LG ENERGY SOLUTION, LTD. patent applications on April 24th, 2025
Patent Applications by LG ENERGY SOLUTION, LTD. on April 24th, 2025
LG ENERGY SOLUTION, LTD.: 24 patent applications
LG ENERGY SOLUTION, LTD. has applied for patents in the areas of H01M4/04 (3), H01M50/249 (3), H01M50/204 (2), H01M10/613 (2), H01M10/6567 (2) H01M10/0565 (2), H01M10/6567 (2), A62C3/16 (1), H01M50/367 (1), H01M50/35 (1)
With keywords such as: battery, electrode, assembly, portion, case, unit, cell, module, part, and configured in patent application abstracts.
Patent Applications by LG ENERGY SOLUTION, LTD.
20250128100. BATTERY PACK WITH IMPROVED SAFETY_simplified_abstract_(lg energy solution, ltd.)
Inventor(s): Jong Kyu AHN of Daejeon KR for lg energy solution, ltd., Jeong Oh MOON of Daejeon KR for lg energy solution, ltd., Jaeki LEE of Daejeon KR for lg energy solution, ltd., Kiyoun KIM of Daejeon KR for lg energy solution, ltd., Hyeon Kyu KIM of Daejeon KR for lg energy solution, ltd., Gidong PARK of Daejeon KR for lg energy solution, ltd., Seongju LEE of Daejeon KR for lg energy solution, ltd., Youngwon YUN of Daejeon KR for lg energy solution, ltd.
IPC Code(s): A62C3/16, H01M50/209, H01M50/291, H01M50/507
CPC Code(s): A62C3/16
Abstract: a battery pack includes a cell module assembly including a battery cell stack in which a plurality of battery cells are stacked and each battery cell is erected in a vertical direction; a plate-shaped blocking member disposed between adjacent battery cells and erected in a vertical direction; a pack case configured so as to house the cell module assembly and opened at its upper surface; and a fire-fighting tank located above the cell module assembly and covering an upper surface of the pack case. the blocking member includes a plurality of openings at its upper end, and an inside of the blocking member includes an empty space connected to the plurality of openings.
Inventor(s): Chang-Je LEE of Daejeon KR for lg energy solution, ltd., Min-Jae KANG of Daejeon KR for lg energy solution, ltd., Gu-Cheol KIM of Daejeon KR for lg energy solution, ltd.
IPC Code(s): B23K26/24
CPC Code(s): B23K26/24
Abstract: discussed are a welding device and a welding method that may improve welding efficiency during a battery manufacturing process, and a battery manufacturing device and a vehicle manufacturing device including such a welding device. a welding device can include a laser irradiation unit configured to irradiate a laser; and a laser power control unit configured to control the laser irradiation unit to irradiate the laser with the peak power and the laser with the base power to a welding portion.
20250128640. BATTERY CONTROL DEVICE AND METHOD_simplified_abstract_(lg energy solution, ltd.)
Inventor(s): Eun HEO of Daejeon KR for lg energy solution, ltd., Ji-Hoon AHN of Daejeon KR for lg energy solution, ltd.
IPC Code(s): B60L58/13, H02J7/00
CPC Code(s): B60L58/13
Abstract: a battery control device includes: a connector turning on or off a connection state between a plurality of batteries and an output terminal to which a discharge current is output, for each battery; a controller controlling the connector such that the plurality of batteries are connected in parallel with each other to the output terminal and discharged during a first discharge period from a start time of discharge of the plurality of batteries each of which soc is a predetermined reference value or more until a time when the soc of at least one of the plurality of batteries reaches the reference value, and connected alternatively to the output terminal and discharged during a second discharge period from a time when the soc of each of the plurality of batteries becomes lower than the reference value until a time when the discharge of the plurality of batteries is terminated.
Inventor(s): Soon-Hyung CHOI of Daejeon KR for lg energy solution, ltd., Dae-Soo KIM of Daejeon KR for lg energy solution, ltd., Young-Deok KIM of Daejeon KR for lg energy solution, ltd.
IPC Code(s): G01R31/389, G01R31/367, G01R31/3835, G01R31/392, H02J7/00
CPC Code(s): G01R31/389
Abstract: an apparatus for diagnosing a battery according to one aspect of the present disclosure may include a measuring unit configured to measure a voltage value of the battery at each predetermined cycle during a battery charging process; and a processor configured to calculate a resistance value of the battery based on the measured voltage value of the battery, determine a resistance change pattern by comparing the calculated plurality of resistance values with a preset criterion profile, and determine the state of the battery based on the determined resistance change pattern.
Inventor(s): Shinkyu KANG of Daejeon KR for lg energy solution, ltd., Min Yong Kim of Daejeon KR for lg energy solution, ltd., Hyeong Geun Chae of Daejeon KR for lg energy solution, ltd., Nam Hyuck Kim of Daejeon KR for lg energy solution, ltd., Youngduk Kim of Daejeon KR for lg energy solution, ltd., Su Ho Jeon of Daejeon KR for lg energy solution, ltd., Sung Nam Cho of Daejeon KR for lg energy solution, ltd.
IPC Code(s): G05B19/418, H01M4/04
CPC Code(s): G05B19/41885
Abstract: a simulation apparatus for secondary battery production is provided. the simulation apparatus for secondary battery production comprises a memory configured to store at least one instruction and at least one processor configured to execute the at least one instruction stored in the memory. the at least one instruction includes instructions for executing an apparatus operating unit including a 3d coater related to secondary battery production, a facility operating unit including a plurality of adjustment parameters for determining operation of the 3d coater, and a quality checking unit including quality information related to quality of a material produced by the 3d coater.
Inventor(s): Dong Su Kim of Daejeon KR for lg energy solution, ltd., Junyeong Kim of Daejeon KR for lg energy solution, ltd.
IPC Code(s): G05D1/667, G05D1/229, G05D1/661, G05D105/28, G05D107/70
CPC Code(s): G05D1/667
Abstract: an automatic transportation control method includes moving, by an automatic guidance vehicle, to a first node which is an initial reference location according to an instruction from an automatic transportation control apparatus; moving, by the automatic guidance vehicle, to a second node which is a stand-by location before entering a production facility from the first node; moving, by the automatic guidance vehicle, to a third node for docking to the production facility from the second node; and receiving, by the automatic guidance vehicle, the changed location coordinate value of the second node from the automatic transportation control apparatus, and traveling based on the changed location coordinate value of the second node when the second node is changed according to a work location change of the production facility.
Inventor(s): Ran CHOI of Daejeon KR for lg energy solution, ltd., Jee Ho YOM of Daejeon KR for lg energy solution, ltd.
IPC Code(s): H01M4/583, H01M4/02, H01M4/04
CPC Code(s): H01M4/583
Abstract: the present disclosure provides an all-solid-state battery using lithium or a lithium alloy as an anode active material, the all-solid-state battery including: a cathode, a solid electrolyte layer, a coating layer, and an anode current collector, wherein the coating layer comprises an amorphous carbon, wherein the amorphous carbon comprises a nitrogen-containing amorphous carbon, and wherein a nitrogen amount (atomic %) included in the coating layer ranges from 0.5% to 7%. the all-solid-state battery according to the present disclosure may exhibit excellent capacity retention over cycles during high-rate charge and discharge.
Inventor(s): Nam-Jeong Lee of Daejeon KR for lg energy solution, ltd., Koo-Seung Chung of Daejeon KR for lg energy solution, ltd., Sang-Min Kwak of Daejeon KR for lg energy solution, ltd., Ji-Hyun Kim of Daejeon KR for lg energy solution, ltd., Dong-Oh Shin of Daejeon KR for lg energy solution, ltd., Ki-Seok Lee of Daejeon KR for lg energy solution, ltd., Kwang-Ho Yoo of Daejeon KR for lg energy solution, ltd.
IPC Code(s): H01M4/62, H01M4/04, H01M10/052
CPC Code(s): H01M4/623
Abstract: disclosed are an electrode, a secondary battery comprising the same and an energy storage system, the electrode comprising: an electrode current collector; and an electrode layer on the electrode current collector, the electrode layer comprising an active material, a conductive material and a fluorine-containing binder, wherein the electrode layer has a quantified binder ratio (qbr) of 1.1 or less, and the qbr is defined as the following equation:
Inventor(s): Nam-Jeong Lee of Daejeon KR for lg energy solution, ltd., Koo-Seung Chung of Daejeon KR for lg energy solution, ltd., Sang-Min Kwak of Daejeon KR for lg energy solution, ltd., Ji-Hyun Kim of Daejeon KR for lg energy solution, ltd., Dong-Oh Shin of Daejeon KR for lg energy solution, ltd., Ki-Seok Lee of Daejeon KR for lg energy solution, ltd., Kwang-Ho Yoo of Daejeon KR for lg energy solution, ltd.
IPC Code(s): H01M4/62, H01M4/04, H01M10/052
CPC Code(s): H01M4/623
Abstract:
Inventor(s): Nam-Jeong Lee of Daejeon KR for lg energy solution, ltd., Koo-Seung Chung of Daejeon KR for lg energy solution, ltd., Sang-Min Kwak of Daejeon KR for lg energy solution, ltd., Ji-Hyun Kim of Daejeon KR for lg energy solution, ltd., Dong-Oh Shin of Daejeon KR for lg energy solution, ltd., Ki-Seok Lee of Daejeon KR for lg energy solution, ltd., Kwang-Ho Yoo of Daejeon KR for lg energy solution, ltd.
IPC Code(s): H01M4/62, H01M4/04, H01M10/052
CPC Code(s): H01M4/623
Abstract: bs denotes an average fluorine content in an electrode layer surface region within 15% of a total thickness of the electrode layer from an outermost surface of the electrode layer, and bf denotes an average fluorine content in an electrode layer bottom region within 15% of the total thickness of the electrode layer from an interface between the electrode layer and the current collector.
Inventor(s): Dong Hyun Kim of Daejeon KR for lg energy solution, ltd., Houng Sik Yoo of Daejeon KR for lg energy solution, ltd., Seong Kyun Kang of Daejeon KR for lg energy solution, ltd., Gye Min Kwon of Daejeon KR for lg energy solution, ltd., Hyeon Choi of Daejeon KR for lg energy solution, ltd.
IPC Code(s): H01M4/62, C01B32/174, C09C1/56, H01B1/24, H01M4/02, H01M10/0525
CPC Code(s): H01M4/625
Abstract: a conductive material dispersion includes a carbon-based conductive material, a main dispersant, an auxiliary dispersant, and a dispersion medium, wherein the main dispersant is a nitrile-based copolymer and the auxiliary dispersant is a copolymer including an oxyalkylene unit and at least one selected from the group consisting of a styrene unit and an alkylene unit.
Inventor(s): Jong Seong You of Daejeon KR for lg energy solution, ltd., Min Ki Kim of Daejeon KR for lg energy solution, ltd.
IPC Code(s): H01M10/04
CPC Code(s): H01M10/0409
Abstract: an apparatus for manufacturing an electrode assembly, includes a mandrel, a first fixing part, and a second fixing part. the mandrel to winds an electrode assembly including a first electrode, a first separator, a second electrode, and a second separator. the first fixing part to fix an outermost periphery of the electrode assembly, and the second fixing part is positioned to be spaced apart from the first fixing part along a circumference of the mandrel and to fix the first and second separators. the first fixing part includes a position adjustment part to adjust a position thereof in accordance with a winding thickness of the electrode assembly. a method comprising the same is also provided.
Inventor(s): Sunghyun NAM of Daejeon KR for lg energy solution, ltd., Hyeaeun HAN of Daejeon KR for lg energy solution, ltd., Dong Kyu KIM of Daejeon KR for lg energy solution, ltd.
IPC Code(s): H01M10/0565
CPC Code(s): H01M10/0565
Abstract: a polymer solid electrolyte and a method for preparing the same are provided. the method includes preparing a polymer solid electrolyte, defining a correlation between an added amount of a lithium salt and ionic conductivity of the polymer solid electrolyte, and adjusting the added amount of the lithium salt depending on the ionic conductivity of the prepared solid electrolyte, and is thereby capable of preparing a polymer solid electrolyte having high ionic conductivity through a large-capacity continuous process.
Inventor(s): Ji-Hoon RYU of Daejeon KR for lg energy solution, ltd., Tae-Seob LIM of Daejeon KR for lg energy solution, ltd., Dong-Kyu KIM of Daejeon KR for lg energy solution, ltd., Yeo-Min YOON of Daejeon KR for lg energy solution, ltd., Jung-Pil LEE of Daejeon KR for lg energy solution, ltd.
IPC Code(s): H01M10/0565, H01M10/44, H01M50/42, H01M50/434, H01M50/446, H01M50/46, H01M50/609
CPC Code(s): H01M10/0565
Abstract: the present disclosure relates to a method for manufacturing a gel polymer electrolyte secondary battery which allows easy removal of the gases generated in the secondary battery, and provides the secondary battery with significantly improved resistance and life characteristics and improved mechanical properties and thus improved stiffness and safety.
Inventor(s): Han Ki YOON of Daejeon KR for lg energy solution, ltd., Sanghyun YU of Daejeon KR for lg energy solution, ltd., Hyeok NAMGOUNG of Daejeon KR for lg energy solution, ltd., Young Bum CHO of Daejeon KR for lg energy solution, ltd., Ji Won JEONG of Daejeon KR for lg energy solution, ltd., Wonhoe KU of Daejeon KR for lg energy solution, ltd.
IPC Code(s): H01M10/48, G01K1/143
CPC Code(s): H01M10/486
Abstract: a temperature sensing member is located between two adjacent battery cells, and includes a main body part arranged in parallel to one surface of the battery cell, and a temperature measuring unit mounted on the main body part and measuring the temperature of the battery cell. the main body part has a plate shape. the temperature measuring unit is inserted into one side of the main body part.
Inventor(s): Jung-Hoon Lee of Daejeon KR for lg energy solution, ltd., Doo-Seung Kim of Daejeon KR for lg energy solution, ltd., Tae-Ki Um of Daejeon KR for lg energy solution, ltd., Jae-Uk Ryu of Daejeon KR for lg energy solution, ltd.
IPC Code(s): H01M10/6567, H01M10/613, H01M10/6551, H01M50/204, H01M50/249, H01M50/284
CPC Code(s): H01M10/6567
Abstract: an immersion-cooled battery module according to the present disclosure can includes a battery assembly with a plurality of battery units. a module case of the battery module can extend in a first direction and have an opening at least at one end in a first direction. the module case can accommodate the battery assembly and a cooling liquid in an internal space of the module case connected to the opening. a sealing cover is configured to airtightly seal the opening.
20250132418. POWER STORAGE DEVICE_simplified_abstract_(lg energy solution, ltd.)
Inventor(s): Jin-Kyu LEE of Daejeon KR for lg energy solution, ltd.
IPC Code(s): H01M10/6567, H01M10/48, H01M10/613, H01M10/6556
CPC Code(s): H01M10/6567
Abstract: an energy storage system includes a rack container having a predetermined accommodation space, a plurality of battery racks disposed in the rack container and respectively having a coolant tank in which a predetermined coolant is contained, and at least one flux supplement unit configured to connect the coolant tanks of the plurality of battery racks.
Inventor(s): Jeong-Hoon PARK of Daejeon KR for lg energy solution, ltd., Hye-Mi JUNG of Daejeon KR for lg energy solution, ltd., Soo-Youl KIM of Daejeon KR for lg energy solution, ltd.
IPC Code(s): H01M50/105, H01M10/04, H01M50/178, H01M50/186, H01M50/54, H01M50/55
CPC Code(s): H01M50/105
Abstract: a pouch-type battery cell includes an electrode assembly configured such that positive electrode plates and negative electrode plates are repeatedly arranged to face each other with a separator interposed therebetween; an exterior pouch case configured to store the electrode assembly to be sealed; and electrode leads connected to a bundle of electrode tabs extending from the electrode assembly inside the exterior pouch case and protruding to the outside of the exterior pouch case. the electrode leads include a first electrode lead and a second electrode lead that face each other, extend in the same direction, and have the same polarity. a rupture sealing member is provided between the first electrode lead and the second electrode lead such that one side thereof is bonded to the first electrode lead and the other side is bonded to the second electrode lead.
20250132428. BATTERY CORE MODULE_simplified_abstract_(lg energy solution, ltd.)
Inventor(s): Chien-Pin Huang of Taipei City TW for lg energy solution, ltd.
IPC Code(s): H01M50/14, H01M50/55, H01M50/552, H01M50/581
CPC Code(s): H01M50/14
Abstract: discussed is a battery module, which includes a battery unit and an anti-collision structure. the battery unit may include a battery body, a first electrode, a second electrode and a thermal cut-off. the battery body has an end portion. the first electrode, the second electrode and the thermal cut-off are disposed at the end portion. the thermal cut-off is connected to the first electrode. the anti-collision structure includes a first sheet and a second sheet. the end portion, a part of the first electrode, a part of the second electrode and the thermal cut-off are installed between the first sheet and the second sheet. the first sheet and the second sheet are coupled to each other.
Inventor(s): Min Gyu KIM of Daejeon KR for lg energy solution, ltd., Joo Hwan SUNG of Daejeon KR for lg energy solution, ltd., Min Su CHO of Daejeon KR for lg energy solution, ltd., Geun Young PARK of Daejeon KR for lg energy solution, ltd.
IPC Code(s): H01M50/169, H01M50/109, H01M50/153, H01M50/531, H01M50/559, H01M50/586
CPC Code(s): H01M50/169
Abstract: a button-type secondary battery has a diameter greater than a height thereof. the button type secondary battery includes a can body defining an accommodation space therein and having an opened upper end; an electrode assembly accommodated in the accommodation space of the can body; and a top cap assembly configured to cover the upper end of the can body and coupled to the can body. the top cap assembly includes a base plate having a flat plate shape and bent upward from a circumferential area thereof; an electrode terminal having a flat plate shape to be seated on an upper portion of the base plate, wherein the electrode terminal comprises a protrusion protruding downward from a central area thereof; and an insulating member between the base plate and the electrode terminal.
Inventor(s): Euihoon MYUNG of Daejeon KR for lg energy solution, ltd.
IPC Code(s): H01M50/204, H01M50/236
CPC Code(s): H01M50/204
Abstract: provided is a battery module including a battery cell assembly () that comprises a reference plate () which has a predetermined thickness in a third direction, and a first stack () and a second stack () which are respectively coupled to a first side surface and a second side surface of the reference plate () in the third direction and respectively comprise a plurality of battery cells (c) stacked and coupled to each other in the third direction; and a frame () with an inner space (s) in which the battery cell assembly () is inserted and accommodated (). the inner space (s) comprises a predetermined portion (p) accommodating the reference plate (), and one side portion (p) and the other side portion (p) respectively corresponding to spaces at one side and the other side of the predetermined portion (p) in the third direction with respect to the predetermined portion (p) and respectively accommodating the first stack () and the second stack (). a position of the predetermined portion (p) is determined based on lengths of the first stack () and the second stack () in the third direction. thus, the battery module () that has a simple configuration and ensures improvement in safety and reliability can be manufactured readily and rapidly without incurring large costs.
Inventor(s): Jeong-Hoon Park of Daejeon KR for lg energy solution, ltd., Ka-Hyun Yoon of Daejeon KR for lg energy solution, ltd., Hye-Mi Jung of Daejeon KR for lg energy solution, ltd., Hyuk-Kyun Chang of Daejeon KR for lg energy solution, ltd., Jung-Woo Choi of Daejeon KR for lg energy solution, ltd.
IPC Code(s): H01M50/211, H01M50/249, H01M50/383, H01M50/507
CPC Code(s): H01M50/211
Abstract: provided is a battery pack and a vehicle including the same. a battery pack according to an embodiment of the present disclosure includes a plurality of pouch-type battery cells, a pack case having an inner space in which the plurality of pouch-type battery cells are accommodated, and a plurality of cell covers provided in the inner space of the pack case to at least partially surround at least some of the plurality of pouch-type battery cells, each of the plurality of cell covers being each to have a dimension that is changeable in a width direction.
Inventor(s): Gae-Sung Kim of Daejeon KR for lg energy solution, ltd., Tae-Young Park of Daejeon KR for lg energy solution, ltd., Bum Choi of Daejeon KR for lg energy solution, ltd.
IPC Code(s): H01M50/293, H01M10/643, H01M50/213, H01M50/227, H01M50/229, H01M50/231, H01M50/249, H01M50/291, H01M50/367
CPC Code(s): H01M50/293
Abstract: a battery pack includes a pack case, a battery cell assembly, a resin layer, and an inorganic film. the battery cell assembly includes a plurality of battery cells accommodated in the pack case; and the resin layer fills a relatively lower portion of a space between the plurality of battery cells. the inorganic film fills a relatively upper portion of the space between the plurality of battery cells. a method of manufacture is also provided.
Inventor(s): Doo Seung KIM of Daejeon KR for lg energy solution, ltd., Il Suk SIM of Daejeon KR for lg energy solution, ltd.
IPC Code(s): H01M50/35, F16K17/16, F16K24/04, F16K27/00, H01M50/184, H01M50/342
CPC Code(s): H01M50/35
Abstract: a gas venting device, and a battery module and a battery pack including same has a gradually reducing cross-sectional area of a flow path in a gas discharge direction so that a greater flow rate of gas can be discharged even when a venting disc having the same area is used.
20250132456. BATTERY PACK WITH DOUBLE COVER_simplified_abstract_(lg energy solution, ltd.)
Inventor(s): Jung Hoon Lee of Daejeon KR for lg energy solution, ltd., Kwang Mo Kim of Daejeon KR for lg energy solution, ltd., Hye Mi Jung of Daejeon KR for lg energy solution, ltd.
IPC Code(s): H01M50/367, H01M50/271, H01M50/289
CPC Code(s): H01M50/367
Abstract: a battery pack with a double cover includes a plurality of battery modules; and a case accommodating the battery modules, the case includes the double cover disposed at an upper portion of the case, and the double cover includes a first lid disposed above the battery module and having a through hole; and a second lid above the first lid and spaced apart from the first lid.
Inventor(s): Hyun-Jong LEE of Daejeon KR for lg energy solution, ltd., Jae-Sang KIM of Daejeon KR for lg energy solution, ltd.
IPC Code(s): H01R13/52, H01M50/296, H01R43/00
CPC Code(s): H01R13/521
Abstract: a waterproof connector includes at least one connector terminal, a connector housing including a connecting portion formed on a front surface to connect another connector and an opening portion formed on a rear surface to form an open space through which the connector terminal is exposed, a connector cable connected to a side of the connector terminal exposed through the opening portion, and a bag molding member which is an injection molded product, the bag molding member surrounding and sealing the opening portion.
LG ENERGY SOLUTION, LTD. patent applications on April 24th, 2025
- LG ENERGY SOLUTION, LTD.
- A62C3/16
- H01M50/209
- H01M50/291
- H01M50/507
- CPC A62C3/16
- Lg energy solution, ltd.
- B23K26/24
- CPC B23K26/24
- B60L58/13
- H02J7/00
- CPC B60L58/13
- G01R31/389
- G01R31/367
- G01R31/3835
- G01R31/392
- CPC G01R31/389
- G05B19/418
- H01M4/04
- CPC G05B19/41885
- G05D1/667
- G05D1/229
- G05D1/661
- G05D105/28
- G05D107/70
- CPC G05D1/667
- H01M4/583
- H01M4/02
- CPC H01M4/583
- H01M4/62
- H01M10/052
- CPC H01M4/623
- C01B32/174
- C09C1/56
- H01B1/24
- H01M10/0525
- CPC H01M4/625
- H01M10/04
- CPC H01M10/0409
- H01M10/0565
- CPC H01M10/0565
- H01M10/44
- H01M50/42
- H01M50/434
- H01M50/446
- H01M50/46
- H01M50/609
- H01M10/48
- G01K1/143
- CPC H01M10/486
- H01M10/6567
- H01M10/613
- H01M10/6551
- H01M50/204
- H01M50/249
- H01M50/284
- CPC H01M10/6567
- H01M10/6556
- H01M50/105
- H01M50/178
- H01M50/186
- H01M50/54
- H01M50/55
- CPC H01M50/105
- H01M50/14
- H01M50/552
- H01M50/581
- CPC H01M50/14
- H01M50/169
- H01M50/109
- H01M50/153
- H01M50/531
- H01M50/559
- H01M50/586
- CPC H01M50/169
- H01M50/236
- CPC H01M50/204
- H01M50/211
- H01M50/383
- CPC H01M50/211
- H01M50/293
- H01M10/643
- H01M50/213
- H01M50/227
- H01M50/229
- H01M50/231
- H01M50/367
- CPC H01M50/293
- H01M50/35
- F16K17/16
- F16K24/04
- F16K27/00
- H01M50/184
- H01M50/342
- CPC H01M50/35
- H01M50/271
- H01M50/289
- CPC H01M50/367
- H01R13/52
- H01M50/296
- H01R43/00
- CPC H01R13/521