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公开(公告)号：EP4123813A1
公开(公告)日：2023-01-25
申请号：EP21936252.2
申请日：2021-05-28
发明人： ZHU, Jianping , ZHANG, Xiaoxi , KE, Haibo , CHEN, Heng , CAO, Junqi
IPC分类号： H01M50/30
摘要： Embodiments of this application provide an end cap assembly (23), a battery cell (20), a battery (100), an electrical device, and a method and device (2000) for manufacturing a battery cell (20), and relate to the technical field of batteries (100). The end cap assembly (23) includes an end cap (233) and a pressure relief mechanism (234). The pressure relief mechanism (234) is connected to the end cap (233). The pressure relief mechanism (234) is configured to: keep in a first pressure relief state when an internal pressure or temperature of the battery cell (20) is greater than or equal to a first threshold and less than a second threshold, so as to release the internal pressure of the battery cell (20); and keep in a second pressure relief state when the internal pressure or temperature of the battery cell (20) is greater than or equal to the second threshold, so as to release the internal pressure of the battery cell (20). A pressure relief area in the first pressure relief state is smaller than a pressure relief area in the second pressure relief state. The pressure can be released rapidly when the internal pressure or temperature of the battery cell (20) is relatively high, thereby improving the pressure relief capability and ensuring the internal pressure to be constant at all times. Without needing to reserve a gas storage space, the pressure relief mechanism (234) does not occupy an internal space of the battery cell (20), and does not affect the energy density of the battery cell (20).
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公开(公告)号：EP4391183A1
公开(公告)日：2024-06-26
申请号：EP23777706.5
申请日：2023-02-21
发明人： ZHONG, Qineng , XING, Chengyou , YAN, Miaomiao , SONG, Shutao , ZHANG, Xiaoxi
IPC分类号： H01M50/30 , H01M50/152
CPC分类号： Y02E60/10 , H01M50/30 , H01M50/152
摘要： The embodiments of the present application provide an end cover, a battery cell, a battery, and an electric apparatus, relating to the technical field of batteries. The end cover comprises a cover body and an arc-shaped groove. The arc-shaped groove is provided in the cover body, and the cover body is configured to crack along the arc-shaped groove when a pressure or temperature in the battery cell reaches a threshold, such that the pressure in the battery cell is released. A depth of the arc-shaped groove is gradually increased from the middle of the arc-shaped groove to the two ends of the arc-shaped groove. In this way, a residual thickness of the cover body at the position where the arc-shaped groove is arranged is gradually increased from the two ends of the arc-shaped groove to the middle of the arc-shaped groove, such that an anti-damage capability of the cover body at the middle of the arc-shaped groove is increased, the risk that the end cover starts to relieve the pressure before the pressure in the battery cell reaches an initiation pressure is reduced, and the service life of the battery cell is prolonged.
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公开(公告)号：EP4184689A1
公开(公告)日：2023-05-24
申请号：EP21939978.9
申请日：2021-09-28
发明人： MENG, Wanqiu , LIU, Qian , YE, Yonghuang , ZHENG, Yulian , XUE, Longfei , ZHANG, Xiaoxi , WANG, Peng
IPC分类号： H01M50/30 , H01M50/308 , H01M50/317 , H01M50/325 , H01M50/202
摘要： This application relates to a battery cell, a cover assembly, a battery, an electric apparatus, a method, and a device. The battery cell includes: an electrode assembly; a housing configured to accommodate the electrode assembly, where a wall portion of the housing includes a body portion and a fastener, the fastener is provided with a recess communicating with the outside, and the recess is arranged on an inner surface of the fastener facing the electrode assembly and recessed in a direction leaving the electrode assembly; and an air-permeable member covering the recess, where the air-permeable member is configured to allow gas to be discharged to the outside of the housing through the recess when a gas pressure inside the housing reaches a threshold, a bottom wall of the recess is provided with a protruding portion extending toward the electrode assembly, and the protruding portion is configured to be attached to the air-permeable member, so as to limit deformation of the air-permeable member in a thickness direction of the wall portion. The embodiments of this application can alleviate battery safety problems caused by gas discharge.
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公开(公告)号：EP4386957A1
公开(公告)日：2024-06-19
申请号：EP21967664.0
申请日：2021-12-16
发明人： LIU, Yanyu , ZHENG, Yulian , ZHANG, Xiaoxi , HUANG, Shoujun , CHEN, Xinxiang , WANG, Peng
IPC分类号： H01M50/30
摘要： A battery cell, a cover assembly, a battery, an electricity-consuming apparatus, a method and a device of manufacturing the battery cell are provided by the present application. The battery cell includes an electrode assembly; a casing accommodating the electrode assembly, in which the casing includes a wall portion, the wall portion includes a stepped hole, the stepped hole includes a first hole segment, a second hole segment and a first stepped face; a sealing member, in which a first sealing interface is formed between the sealing member and the first stepped face, the first sealing interface surrounds the first hole segment, and the sealing member includes a ventilating hole communicating with the first hole segment; a gas-ventilating film including a body and a convex portion, in which the body covers the ventilating hole, a second sealing interface is formed between the body and the sealing member, the second sealing interface surrounds the ventilating hole, the convex portion is arranged at a side of the body facing the sealing member, and the convex portion is located between the hole wall of the second hole segment and the sealing member to restrict the gas-ventilating film moving in a radial direction of the second hole segment; and a fixing member, connected to the wall portion and configured to provide a pressure to the gas-ventilating film. The present application can alleviate the battery safety problem caused by exhausting gas.
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5.发明公开
公开(公告)号：EP4203160A1
公开(公告)日：2023-06-28
申请号：EP21953776.8
申请日：2021-08-19
发明人： MENG, Wanqiu , LIU, Qian , YE, Yonghuang , LIU, Wenzhong , ZHANG, Xiaoxi , XUE, Longfei
IPC分类号： H01M50/30 , H01M50/35 , H01M50/10 , H01M50/147
摘要： The present application provides a battery cell, including a cover plate, a housing, and a gas-permeable film. The housing has an opening, and the cover plate covers the opening of the housing. The cover plate and/or housing have/has at least one through hole, and the inside and the outside of the battery cell are in communication with each other via the through hole; and the gas-permeable film is connected to the inside of the cover plate and/or housing and covers the at least one through hole. According to the battery cell of the present application, gas inside a battery can be discharged to prevent the gas from accumulating inside the housing, thereby improving performance of an electrode assembly, prolonging service life of a secondary battery, and ensuring safety performance of the battery cell.
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公开(公告)号：EP4184688A1
公开(公告)日：2023-05-24
申请号：EP21937196.0
申请日：2021-09-28
发明人： MENG, Wanqiu , LIU, Qian , YE, Yonghuang , ZHENG, Yulian , XUE, Longfei , ZHANG, Xiaoxi , WANG, Peng
IPC分类号： H01M50/30 , H01M50/202
摘要： The present invention provides an exhaust apparatus, a battery cell, a battery, and an electric apparatus, and relates to the field of battery technologies. The exhaust apparatus includes an exhaust body and an exhaust mechanism, where the exhaust mechanism includes a connection member and a ventilation member that are provided on the exhaust body, the connection member is configured to connect the exhaust body, the connection member is provided with a plurality of first through holes, the ventilation member covers the plurality of first through holes, and the ventilation member is configured to, when a pressure of gas inside a battery cell reaches a first threshold, exhaust the gas to the outside of the battery cell through the plurality of first through holes. The connection member includes a connection portion formed between two adjacent ones of the first through holes, and the connection portion is configured to attach to the ventilation member to limit deformation of the ventilation member. This application can meet internal gas exhaust requirements of the battery cell, and can also ensure safety performance of the battery cell.
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公开(公告)号：EP4376193A1
公开(公告)日：2024-05-29
申请号：EP22918372.8
申请日：2022-12-14
发明人： DENG, Gao , CHEN, Yuefei , MENG, Wanqiu , ZHANG, Xiaoxi , XUE, Longfei
摘要： This application provides a degassing apparatus, a battery cell, a battery, and an electric apparatus. The degassing apparatus includes a degassing body, a breathable member, and a protection member. The breathable member and the protection member are disposed at the degassing body, and the protection member is disposed on a side of the breathable member back away from an electrode assembly of the battery cell. The protection member is provided with a through-hole, and a gas channel in communication with the first through-hole is formed between the breathable member and the protection member. The breathable member is configured for gas to pass through when pressure in the battery cell reaches a first threshold, such that the gas passes through the gas channel and the first through-hole to be discharged outside the battery cell. A projection of the first through-hole in an axial direction and a projection of the breathable member in the axial direction are staggered. In the degassing apparatus provided in this application, the projection of the first through-hole in the axial direction and the projection of the breathable member in the axial direction are staggered, reducing the possibility that external impurities damage the breathable member after entering the degassing apparatus, thus effectively improving the safety of the battery cell during operation.
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公开(公告)号：EP4322301A1
公开(公告)日：2024-02-14
申请号：EP21967704.4
申请日：2021-12-16
发明人： MENG, Wanqiu , LIU, Qian , YE, Yonghuang , ZHENG, Yulian , XUE, Longfei , ZHANG, Xiaoxi
IPC分类号： H01M50/30
摘要： A gas-exhausting apparatus, a battery cell, a battery and an electricity-consuming apparatus are provided by the present application. The gas-exhausting apparatus includes a gas-exhausting body and a gas-exhausting mechanism. The gas-exhausting mechanism includes a connecting assembly and a gas-ventilating member. The connecting assembly includes a first connecting member and a second connecting member. The first connecting member is provided with a first through hole for communicating with an inside of the battery cell. The second connecting member is provided with a second through hole for communicating with an outside of the battery cell. The first connecting member is configured to attach to a surface of the gas-ventilating member facing the inside of the battery cell. The second connecting member is configured to attach to a surface of the gas-ventilating member facing away from the inside of the battery cell. An orthographic projection of the first through hole on the gas-ventilating member and an orthographic projection of the second through hole on the gas-ventilating member are arranged to be staggered from each other. The present application can alleviate the aging and damage of the gas-ventilating member caused by an electrolyte adhering to the gas-ventilating member, and improve the overall reliability of the gas-exhausting apparatus.
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公开(公告)号：EP3799182A1
公开(公告)日：2021-03-31
申请号：EP20809286.6
申请日：2020-04-19
发明人： LI, Zhoufu , TANG, Daichun , LONG, Xigui , ZHANG, Xiaoxi , LI, Baiqing , JIANG, Lingyan
IPC分类号： H01M10/052 , H01M10/058 , H01M2/26
摘要： Embodiments of the present application provide a secondary battery, a battery pack, and an electric device. The secondary battery includes: a case with an inner cavity in which an electrolyte is included; a cap assembly covering an opening of the case; and an electrode assembly located in the inner cavity, the electrode assembly including an electrode unit and tabs, and along a length direction, the electrode unit including two side portions disposed oppositely, the tabs extending from the side portions; a connecting component configured to connect the tabs and the cap assembly; a flow guiding component located between a corresponding connecting component and a corresponding side portion and being connected to the connecting component, at least part of the flow guiding component being in contact with the corresponding side portion, and the flow guiding component being in contact with the electrolyte; where the flow guiding component is provided with an avoiding portion, the avoiding portion is configured to avoid the tabs. The flow guiding component could pass the electrolyte in the inner cavity of the case into the electrode unit, wettability of the electrolyte could be improved, risk of lithium precipitation in the electrode assembly is reduced, a service life of the secondary battery is increased. The tabs extend through the avoiding portion to realize the fixed connection between the tabs and the connecting component.
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