Top cover structure, battery cell, battery pack and electric equipment

Abstract

The utility model provides a top cover structure, a battery cell, a battery pack and electric equipment, and relates to the technical field of top cover structures. The top cover structure comprises a top cover and a monitoring assembly, the top cover is provided with a first side and a second side which are opposite, the first side is used for facing the interior of the battery cell, the monitoring assembly is arranged on the second side and communicated with the first side, the monitoring assembly is used for monitoring information in the battery cell, and the monitoring assembly is used for being in communication connection with a battery management device. According to the top cover structure provided by the invention, the information in the single battery cell is monitored through the monitoring assembly, so that the monitoring accuracy and timeliness are relatively good, and the occurrence of battery cell safety accidents can be effectively prevented.

Description

Technical Field

[0001] The present application relates to the technical field of top cover structures, and in particular to a top cover structure, a battery cell, a battery pack and an electrical device. Background Art

[0002] With the rapid development of electric vehicle technology, the safety of battery packs has become an increasing focus of attention.

[0003] In the prior art, a temperature sensor is usually installed in the battery pack to detect the temperature inside the battery pack. When the temperature inside the battery pack is abnormal, the batteries in the battery pack can be controlled to prevent safety accidents.

[0004] However, it takes time for the battery temperature to be transmitted to the temperature sensor, resulting in information lag. Utility Model Content

[0005] The present application provides a top cover structure, a battery cell, a battery pack and an electrical device to solve the problem in the prior art that it takes a certain amount of time for the battery temperature to be transmitted to the temperature sensor, resulting in information lag.

[0006] In a first aspect, the present application provides a top cover structure for a battery cell, comprising:

[0007] a top cover having a first side and a second side opposite to each other, wherein the first side is configured to face toward an interior of the battery cell;

[0008] A monitoring component is provided on the second side and is connected to the first side. The monitoring component is used to monitor information in the battery cell and is used to communicate with a battery management device.

[0009] In some possible implementations, the monitoring assembly includes a monitoring component, which is in communication with the first side for monitoring information within the battery cell, and the monitoring component is configured to communicate with the battery management device.

[0010] In some possible implementations, the monitoring assembly further includes a fixing member, which connects the monitoring member and the top cover.

[0011] In some possible implementations, the monitoring component is located between the fixing component and the top cover, and the fixing component is connected to the top cover.

[0012] In some possible implementations, the fixing member has an avoidance hole, and a portion of the monitoring member extends out of the fixing member through the avoidance hole.

[0013] In some possible implementations, the top cover has a plug hole connecting the first side and the second side, and part of the monitoring components is inserted into the top cover through the plug hole.

[0014] In some possible implementations, the top cover has a groove, the notch of the groove faces the second side, the fixing member is at least partially located in the groove, and the plug hole is located in the groove.

[0015] In some possible implementations, the monitoring assembly further includes an insulating member, the fixing member is at least partially located within the insulating member, and at least a portion of the monitoring member is located between the insulating member and the top cover.

[0016] In some possible implementations, the insulating member is an injection-molded member, and at least a portion of the fixing member is injection-molded inside the insulating member.

[0017] In some possible implementations, the monitoring component further includes a first sealing member, which seals and connects the monitoring member and the top cover.

[0018] In some possible embodiments, the monitoring component includes a package, a circuit board, a signal collector and a transmission interface. The circuit board is encapsulated in the package, and the signal collector and the transmission interface are electrically connected to the circuit board. The signal collector is used to collect information in the battery cell, and the transmission interface is used to communicate with the battery management device.

[0019] In some possible implementations, the top cover includes a top cover body having a plug hole, and part of the monitoring components are inserted into the top cover body through the plug hole.

[0020] In some possible implementations, a plastic part is further included, and the plastic part is used to be arranged between the top cover body and the interior of the battery cell.

[0021] In some possible implementations, the plastic part has a communication hole, and the communication hole is used to connect the plug hole with the interior of the battery core.

[0022] In a second aspect, the present application provides a battery cell, comprising: a shell and any one of the top cover structures in the first aspect described above connected to the shell.

[0023] In a third aspect, the present application provides a battery pack, comprising: a battery pack housing and at least one battery cell group disposed in the battery pack housing, wherein the battery cell group includes at least one battery cell according to the second aspect above.

[0024] In a fourth aspect, the present application provides an electrical device, comprising: a device body and a battery pack according to the third aspect above, which is arranged on the device body.

[0025] The present application proposes a top cover structure, battery cell, battery pack and electrical equipment. The top cover structure monitors the information in the battery cell in real time through a monitoring component to identify the current health status of the battery cell. The monitoring component is communicatively connected to the battery management device so that the monitoring component can transmit the collected information in the battery cell to the battery management device, thereby facilitating the battery management device to control and manage the battery cell. The monitoring component is arranged on the second side of the top cover and is connected to the first side. The monitoring component is more convenient for monitoring the information in the battery cell. At the same time, the monitoring component has good accuracy and timeliness in monitoring, which can effectively prevent the occurrence of battery cell safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0027] Figure 1 A schematic diagram of the structure of the top cover provided in an embodiment of the present application;

[0028] Figure 2 for Figure 1 Explosion diagram of

[0029] Figure 3 for Figure 1 sectional view of

[0030] Figure 4 for Figure 3 A magnified schematic diagram of point A in the middle;

[0031] Figure 5 for Figure 3 A magnified schematic diagram of point B in the middle;

[0032] Figure 6 for Figure 1 Explosion diagram of the monitoring component;

[0033] Figure 7 for Figure 6 a cross-sectional view of the middle monitoring member and the first sealing member;

[0034] Figure 8 A schematic diagram of the structure of a battery cell provided in an embodiment of the present application;

[0035] Figure 9 Schematic diagram of the explosion of part of the battery pack provided in an embodiment of the present application.

[0036] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.

[0037] Description of reference numerals:

[0038] 10-battery cell group; 20-battery cell; 21-shell; 30-battery pack shell;

[0039] 100-top cover structure;

[0040] 200 - top cover; 210 - top cover body; 211 - groove; 212 - plug-in hole; 213 - fixing groove; 214 - pole hole; 220 - pole; 230 - plastic part; 231 - communication hole; 232 - first mounting hole; 240 - pressure plate; 241 - second mounting hole; 250 - mounting member; 251 - first mounting groove; 252 - third mounting hole; 260 - second sealing member; 270 - adapter;

[0041] 300-monitoring component; 310-monitoring part; 311-packaging part; 312-circuit board; 313-signal collector; 314-transmission interface; 320-fixing part; 321-avoidance hole; 322-first annular segment; 323-second annular segment; 324-third annular segment; 330-insulating part; 340-first sealing part; 341-first sealing segment; 342-second sealing segment. DETAILED DESCRIPTION

[0042] The following exemplary embodiments are described in detail, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numbers in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0043] In the prior art, a battery pack includes a housing, a battery pack, and a temperature sensor. The temperature sensor is located on the battery pack or on the inner wall of the housing to detect the temperature within the battery pack. When the temperature within the battery pack becomes abnormal, the batteries within the pack can be controlled to prevent safety accidents. However, after the temperature of a single battery cell becomes abnormal, it takes a certain amount of time for the temperature to be transmitted to the temperature sensor. This causes a lag in abnormal information, resulting in an inability to timely control the battery and effectively prevent safety accidents.

[0044] Based on this, an embodiment of the present application provides a top cover structure that uses a monitoring component to monitor the information within the battery cell in real time to identify the current health status of the battery cell. The monitoring component is communicatively connected to the battery management device so that the monitoring component can transmit the collected information within the battery cell to the battery management device, thereby facilitating the battery management device to control and manage the battery cell. The monitoring component is arranged on the second side of the top cover and connected to the first side. The monitoring component is more convenient for monitoring the information within the battery cell. At the same time, the monitoring component has good accuracy and timeliness in monitoring, which can effectively prevent the occurrence of battery cell safety accidents.

[0045] The embodiments of the present application are described below with reference to the accompanying drawings.

[0046] Reference Figures 1 to 7 The top cover structure 100 provided in an embodiment of the present application is used for a battery cell 20. The top cover structure 100 includes: a top cover 200 and a monitoring assembly 300. The top cover 200 has a first side and a second side facing each other. The first side is configured to face the interior of the battery cell 20. The monitoring assembly 300 is disposed on the second side and is connected to the first side. The monitoring assembly 300 is configured to monitor information within the battery cell 20 and is configured to communicate with a battery management device.

[0047] Among them, the first side is located inside the battery cell 20, the second side is located outside the battery cell 20, part of the monitoring component 300 is set outside the battery cell 20, and part of the monitoring component 300 is set inside the battery cell 20, so that the monitoring component 300 can monitor the information inside the battery cell 20.

[0048] It is understood that the top cover structure 100 provided in the embodiment of the present application can be used for lithium iron phosphate batteries, ternary lithium batteries or sodium ion batteries, etc. The number of monitoring components 300 is at least one, which can be adaptively set according to the battery type and actual needs.

[0049] The monitoring assembly 300 can monitor at least one type of information within the battery cell 20. This information can include temperature, pressure, and gas information. When an abnormality occurs in the battery cell 20, the temperature and pressure within the battery cell 20 may change abnormally, for example, increasing or decreasing. The monitoring assembly 300 monitors the information within the battery cell 20 by sampling and collecting at least one of the pressure, temperature, and gas information within the battery cell 20.

[0050] Specifically, a first side of the top cover 200 is located within the battery cell 20, and a portion of the monitoring assembly 300 is inserted into the top cover 200 from a second side thereof and communicates with the first side to collect information from the first side, that is, information within the battery cell 20. The monitoring assembly 300 is only partially inserted within the battery cell 20 so that the monitoring assembly 300 occupies less space within the battery cell 20, thereby reducing interference with the internal structure of the battery cell 20.

[0051] The monitoring assembly 300 is communicatively connected to the battery management device. It converts the collected information into output signals and transmits them to the battery management device. The battery management device uses the received signals to determine whether a cell 20 anomaly has occurred. If an anomaly is detected, the battery cell 20 can be actively controlled manually or through a control system. This allows for early warning and control measures before a safety incident occurs, ensuring the safety of the cell 20. The monitoring assembly 300 can be electrically connected to the battery management device, or wirelessly connected to the battery management device.

[0052] The top cover structure 100 provided in the embodiment of the present application monitors the information in a single battery cell 20 in real time through the monitoring component 300 to identify the current health status of the battery cell 20. The monitoring component 300 is communicatively connected to the battery management device so that the monitoring component 300 can transmit the collected information in the battery cell 20 to the battery management device, thereby facilitating the battery management device to control and manage the single battery cell 20. The monitoring component 300 is arranged on the second side of the top cover 200 and is connected to the first side. Compared with setting the monitoring component 300 entirely on the outside of the battery cell 20, it is more convenient for the monitoring component 300 to monitor the information in the battery cell 20, and the monitoring component 300 has better accuracy and timeliness in monitoring, which can effectively prevent the occurrence of battery cell safety accidents. Compared with setting the monitoring component 300 inside the battery cell 20, the monitoring component 300 occupies less space in the battery cell 20 and has less impact on the internal structure of the battery cell 20.

[0053] In some embodiments, one end of the monitoring component 300 close to the first side of the top cover 200 is located inside the top cover 200, so that the monitoring component 300 does not need to extend to the first side of the top cover 200 and can be connected to the first side, thereby ensuring that the monitoring component 300 does not occupy the internal space of the battery cell 20 and does not affect the internal structure of the battery cell 20.

[0054] Reference Figure 1 、 Figure 4 and Figure 6 In some embodiments, the monitoring assembly 300 includes a monitoring component 310 , which is in communication with the first side for monitoring information within the battery cell 20 , and the monitoring component 310 is configured to communicate with a battery management device.

[0055] The monitoring component 310 is in communication with the first side of the top cover 200 , thereby facilitating the monitoring component 310 to collect information in the battery cell 20 .

[0056] It should be noted that the monitoring component 310 can be inserted into the top cover 200 or not, so that the monitoring component 310 is connected to the first side, that is, the monitoring space of the monitoring component 310 and the interior of the battery cell 20 are in the same through space.

[0057] For example, the monitoring element 310 may be a temperature sensor, a pressure sensor, etc. The temperature sensor and the pressure sensor are provided to collect the temperature or pressure inside the battery cell 20 .

[0058] In a specific implementation, the monitoring component 300 further includes a fixing member 320 , which connects the monitoring member 310 and the top cover 200 .

[0059] The monitoring member 310 and the top cover 200 are connected by providing a fixing member 320 to fix the monitoring member 310 on the top cover 200. Thus, the connection between the monitoring member 310 and the top cover 200 is more convenient.

[0060] In some embodiments, the monitoring component 310 is located between the fixing component 320 and the top cover 200 , and the fixing component 320 is connected to the top cover 200 .

[0061] A receiving groove is defined between the fixing member 320 and the top cover 200, and at least a portion of the monitoring member 310 is located in the receiving groove. The fixing member 320 is connected to the top cover 200 to fix the monitoring member 310 in the receiving groove.

[0062] In some embodiments, the fixing member 320 may be an injection molded part, and the fixing member 320 is fixedly connected to the monitoring member 310 and the top cover 200 by injection molding, so that the monitoring member 310 is directly fixed to the top cover 200 .

[0063] In some embodiments, the fixing member 320 may be a metal member, and the fixing member 320 may be welded to the top cover 200 .

[0064] In some embodiments, the fixing member 320 and the monitoring member 310 may be connected by threading, clamping, or bonding.

[0065] Reference Figure 4 and Figure 6 In a specific implementation, the fixing member 320 has an avoidance hole 321 , and part of the monitoring member 310 extends out of the fixing member 320 through the avoidance hole 321 .

[0066] Part of the monitoring component 310 extends out of the fixing component 320 through the avoidance hole 321 , so that the monitoring component 310 can be connected to the battery management device for communication.

[0067] Reference Figure 2 and Figure 4 In a specific implementation, the top cover 200 has a plug hole 212 , which connects the first side and the second side, and part of the monitoring component 310 is inserted into the top cover 200 through the plug hole 212 .

[0068] The top cover 200 is provided with a plug hole 212 so that the monitoring component 310 can be plugged into the top cover 200. Specifically, the monitoring component 310 is sealed and connected to the plug hole 212.

[0069] Exemplarily, part of the monitoring component 310 is located on the second side of the top cover 200, and one end of the monitoring component 310 close to the first side of the top cover 200 is located in the plug hole 212, and the plug hole 212 is a through hole, so that the monitoring component 310 can monitor the internal information of the battery cell 20 without occupying the internal space of the battery cell 20.

[0070] In some embodiments, the insertion hole 212 can be an injection hole on the top cover 200. After the electrolyte is injected into the battery cell 20 through the injection hole, the monitoring component 310 is inserted into the injection hole and sealed to the injection hole. In this way, the sealing process of the injection hole can be omitted.

[0071] Reference Figure 2 and Figure 4 In some embodiments, the top cover 200 has a groove 211 , the notch of the groove 211 faces the second side, the fixing member 320 is at least partially located in the groove 211 , and the plug hole 212 is located in the groove 211 .

[0072] The groove 211 provides a stable and reliable connection between the fixing member 320 and the top cover 200. The insertion hole 212 is located at the bottom of the groove 211 and communicates with the receiving groove. At least part of the monitoring member 310 is located in the receiving groove, and part of the monitoring member 310 is inserted into the insertion hole 212.

[0073] Exemplarily, the fixing member 320 is connected to both the sidewall of the groove 211 and a portion of the bottom of the groove 211. Furthermore, the fixing member 320 may be welded to at least one of the sidewall of the groove 211 and a portion of the bottom of the groove 211.

[0074] Specifically, the fixing member 320 includes a first annular segment 322, a second annular segment 323, and a third annular segment 324. The second annular segment 323 is inclined relative to the first annular segment 322 and the third annular segment 324. The second annular segment 323 connects the first annular segment 322 and the third annular segment 324, and the first annular segment 322 and the third annular segment 324 are respectively disposed on opposite sides of the second annular segment 323. The first annular segment 322, the second annular segment 323, and the third annular segment 324 can be integrally formed.

[0075] The first annular segment 322 is partially located within the groove 211 and is connected to the sidewalls and bottom of the groove 211. The third annular segment 324 is located on the side of the first annular segment 322 facing away from the top cover 200 and opposite the bottom of the groove 211. The second annular segment 323, the third annular segment 324, and the bottom of the groove 211 collectively define a receiving groove, within which a portion of the groove 211 is located.

[0076] In some embodiments, the avoidance hole 321 is located on the third annular segment 324 .

[0077] Reference Figure 4 and Figure 6 In some embodiments, the monitoring assembly 300 further includes an insulating member 330 , the fixing member 320 is at least partially located inside the insulating member 330 , and the monitoring member 310 is connected between the insulating member 330 and the top cover 200 .

[0078] The insulating member 330 is provided to isolate the monitoring member 310 , thereby preventing the operator from coming into contact with the monitoring member 310 , thereby protecting the operator from the risk of electric shock and improving safety.

[0079] Exemplarily, a portion of the first ring segment 322 is fixed in the insulating member 330 , and the remaining portion of the first ring segment 322 extends out of the insulating member 330 and is located in the groove 211 . The second ring segment 323 and the third ring segment 324 are both located in the insulating member 330 .

[0080] In some embodiments, the insulating member 330 is an injection-molded member, and at least a portion of the fixing member 320 is injection-molded within the insulating member 330 .

[0081] The fixing member 320 and the monitoring member 310 are injection-molded in the insulating member 330 , so that the connection between the fixing member 320 and the monitoring member 310 and the insulating member 330 is relatively stable and reliable.

[0082] Specifically, the fixing member 320 and the monitoring member 310 may be thermally melted and solidified through the insulating member 330 , so that both the fixing member and the monitoring member 310 are fixed on the insulating member 330 .

[0083] In some embodiments, the insulating member 330 is injection molded, and at least a portion of the fixing member 320 and at least a portion of the monitoring member 310 are fixed in the insulating member 330 by injection molding.

[0084] Reference Figure 4 、 Figure 6 and Figure 7 In a specific implementation, the monitoring component 300 further includes a first sealing member 340 , which seals and connects the monitoring member 310 and the top cover 200 .

[0085] The first sealing member 340 is provided to seal the signal collector 313 and the side wall of the plug hole 212 , thereby sealing the interior of the battery cell 20 and the exterior of the battery cell 20 , ensuring that the interior of the battery cell 20 is in a closed state.

[0086] Exemplarily, the first seal 340 includes a first sealing section 341 and a second sealing section 342, which are integrally formed. The first sealing section 341 is disposed on one side of the second sealing section 342. The first sealing section 341 abuts between the package 311 and the bottom of the groove 211, while the second sealing section 342 abuts between the outer wall of the signal collector 313 and the side wall of the insertion hole 212. Both the first sealing section 341 and the second sealing section 342 are annular.

[0087] In a specific implementation, the monitoring component 310 and the fixing component 320 can be first fixedly connected to the insulating component 330, and then the first sealing component 340 can be sleeved on a portion of the monitoring component 310. Then, the portion of the monitoring component 310 can be inserted into the insertion hole 212 so that the first sealing component 340 abuts against the inner wall of the insertion hole 212. Finally, a force is applied to the insulating component 330 toward the top cover 200 to ensure the compression rate of the first sealing component 340, and then the fixing component 320 is connected to the top cover 200. In this way, the monitoring assembly 300 can be connected to the top cover 200.

[0088] Reference Figure 4 and Figure 7 In a specific implementation, the monitoring component 310 includes a packaging component 311, a circuit board 312, a signal collector 313 and a transmission interface 314. The circuit board 312 is encapsulated in the packaging component 311. The signal collector 313 and the transmission interface 314 are both electrically connected to the circuit board 312. The signal collector 313 is used to collect information in the battery cell 20, and the transmission interface 314 is used to communicate with the battery management device.

[0089] Specifically, the circuit board 312 is encapsulated within the package 311, and a portion of the signal collector 313 is encapsulated within the package 311, while the remaining portion of the signal collector 313 extends out of the package 311 toward the interior of the battery cell 20, allowing the signal collector 313 to collect information from the interior of the battery cell 20. A portion of the transmission interface 314 is encapsulated within the package 311, while the remaining portion of the transmission interface 314 extends out of the package 311 away from the second side, allowing the transmission interface 314 to communicate with the battery management device.

[0090] The signal collector 313 is partially inserted into the insertion hole 212, and the transmission interface 314 extends through the avoidance hole 321. The projections of the insertion hole 212 and the avoidance hole 321 on the packaging member 311 are both located within the packaging member 311, thereby limiting the position of the packaging member 311 and ensuring that the packaging member 311 is always located between the fixing member 320 and the top cover 200, thereby limiting the position of the monitoring member 310.

[0091] A fixing groove is formed on the insulating member 330, which is connected to the plug hole 212. The packaging member 311 is located in the fixing groove and abuts against the inner wall of the fixing groove. The transmission interface 314 is inserted into the insulating member 330 through the bottom of the fixing groove and partially extends out of the insulating member 330.

[0092] In a specific implementation, the signal collector 313 collects information from the battery cell 20 and transmits the collected parameter information to the circuit board 312. The circuit board 312 then converts the parameter information into an electrical signal and transmits it to the transmission interface 314. Finally, the transmission interface 314 feeds the signal back to the battery management unit via circuitry or wireless communication. The battery management unit uses corresponding module algorithms to convert the signal into corresponding temperature and pressure parameters and compares them with preset parameter ranges. If the feedback parameter exceeds the preset parameter range, that is, if the feedback parameter is abnormal, the battery cell 20 can be controlled to bring the feedback parameter back within the preset parameter range.

[0093] In some embodiments, when the feedback parameter returns to a preset parameter range, the battery management device reduces the control operation on the battery cell 20, for example, by reducing the heat exchange efficiency through the cooling system to reduce the power loss of the battery management device.

[0094] Reference Figure 2 and Figure 4 In a specific implementation, the top cover 200 includes a top cover body 210 , which has a plug hole 212 , and a portion of the monitoring component 300 is inserted into the top cover body 210 through the plug hole 212 .

[0095] The top cover body 210 has a first surface and a second surface facing each other, with the first surface facing the interior of the battery cell 20. The top cover body 210 also has a groove 211 located on the second surface. A plug hole 212 is located at the bottom of the groove 211 and connects the bottom of the groove 211 with the first surface. The plug hole 212 facilitates the installation of part of the monitoring assembly 300 on the top cover body 210.

[0096] Exemplarily, the top cover 200 further includes a post 220. The top cover body 210 has a post hole 214, and the post 220 is inserted into the top cover body 210 through the post hole 214. The post 220 is electrically connected to the core inside the battery cell 20. The post 220 is a current conduction path between the core and an external device or circuit. The post 220 is used to conduct the current generated by the core to the external device or circuit.

[0097] As will be understood, the electrode columns 220 include positive and negative electrode columns, and the top cover 200 includes a positive and negative electrode top cover. The positive electrode columns are located on the top cover body 210 of the positive top cover, and the negative electrode columns are located on the top cover body 210 of the negative top cover. The monitoring assembly 300 can be disposed on either the positive or negative top cover. Of course, two monitoring assemblies 300 can also be provided, one on each positive and negative top cover.

[0098] In some embodiments, the positive and negative electrode posts may be located on the same top cover 200 .

[0099] Specifically, the top cover body 210 has a pole hole 214 , the pole hole 214 connects the first surface and the second surface, and the pole 220 is disposed on the first surface and the second surface through the pole hole 214 .

[0100] Reference Figure 2 、 Figure 4 and Figure 5 In a specific implementation, the top cover structure 100 provided in the embodiment of the present application further includes a plastic part 230 , which is used to be arranged between the top cover body 210 and the interior of the battery cell 20 .

[0101] The plastic component 230 is located on a side of the top cover body 210 facing the interior of the battery cell 20 . A first surface of the top cover body 210 faces the plastic component 230 .

[0102] For example, the plastic part 230 has a first mounting hole 232 that communicates with the pole hole 214. The pole 220 is inserted into the plastic part 230 through the first mounting hole 232. The pole 220 is sequentially inserted into the first mounting hole 232 and the pole hole 214.

[0103] The plastic part 230 has good insulation properties. By placing the plastic part 230 between the interior of the battery cell 20 and the top cover body 210, it can prevent metal components inside the battery cell 20 from contacting the top cover body 210 and causing a short circuit, thereby ensuring the safety of the battery cell 20. Furthermore, when the battery cell 20 contains electrolyte, the plastic part 230 helps seal the interior of the battery cell 20, preventing the electrolyte from leaking out of the battery cell 20.

[0104] In a specific implementation, the plastic part 230 has a communication hole 231 , and the communication hole 231 is used to connect the plug hole 212 with the interior of the battery core 20 .

[0105] Part of the monitoring component 300 is inserted into the plug hole 212 so that the monitoring component 300 can communicate with the interior of the battery cell 20 through the communication hole 231 , thereby enabling the monitoring component 300 to monitor information inside the battery cell 20 .

[0106] Reference Figure 2 In a specific implementation, the top cover 200 further includes a pressing plate 240 having a connecting hole. The pole 220 is inserted into the pressing plate 240 through the connecting hole. The pressing plate 240 is arranged on the side of the top cover body 210 away from the plastic part 230 .

[0107] Exemplarily, the top cover 200 further includes a mounting member 250, which is connected between the pressing plate 240 and the top cover body 210. The mounting member 250 is an insulating member.

[0108] Furthermore, the mounting member 250 has a first mounting slot 251, and the pressure plate 240 is located within the first mounting slot 251. The pressure plate 240 has a second mounting hole 241, and the mounting member 250 has a third mounting hole 252, which is located at the bottom of the first mounting slot 251. The pole 220 is sequentially inserted into the pole hole 214, the third mounting hole 252, and the second mounting hole 241. The pressure plate 240 is connected to the pole 220.

[0109] In some embodiments, the pressing plate 240 and the pole 220 are fixed by riveting and then welding.

[0110] In some embodiments, a fixing groove 213 is provided on the second surface of the top cover body 210 , the pole hole 214 is located in the fixing groove 213 , and part of the mounting member 250 is located in the fixing groove 213 to ensure the stability of the connection between the mounting member 250 and the top cover body 210 .

[0111] In some embodiments, the top cover 200 further includes a second sealing member 260 , which seals and connects the pole 220 and a side of the top cover body 210 facing the plastic member 230 .

[0112] The second sealing member 260 is provided to seal the pole 220 and the top cover body 210 .

[0113] Illustratively, a portion of the second sealing member 260 abuts between the pole hole 214 and the pole 220 .

[0114] Specifically, after the pole 220 is connected to the pressing plate 240 , pressure is applied to the pressing plate 240 and the pole 220 to ensure the compression rate of the second sealing member 260 , thereby ensuring that the second sealing member 260 seals the pole 220 and the top cover body 210 .

[0115] In some embodiments, the top cover 200 further includes a connecting piece 270 , which is connected to a side of the plastic component 230 facing away from the top cover body 210 .

[0116] Exemplarily, the adapter 270 has a second mounting groove 271 and a fourth mounting hole 272. The pole 220 is partially located in the second mounting groove 271 and connected to the bottom of the second mounting groove 271. The second mounting groove 271 is provided to fix the pole 220. The fourth mounting hole 272 is located in the second mounting groove 271. By providing the fourth mounting hole 272, the pole 220 is electrically connected to the internal structure of the battery cell 20.

[0117] Reference Figure 8 Based on the above embodiments, an embodiment of the present application provides a battery cell 20 , comprising: a shell 21 and any top cover structure 100 in the above embodiments connected to the shell 21 .

[0118] The specific structure of the top cover structure 100 is described in detail in the above embodiment and will not be repeated here. The battery cell 20 can be a cylindrical battery cell, a square battery cell or a blade battery cell.

[0119] For example, the battery cell 20 further includes a pole core, and the housing 21 and the top cover structure 100 together define a closed receiving cavity, in which the pole core is located. The monitoring component 300 on the top cover structure 100 can be used to monitor information in the receiving cavity.

[0120] There can be one or two top cover structures 100. When there is one top cover structure 100, both the positive and negative electrode posts are located on the top cover 200. When there are two top cover structures 100, both the positive and negative electrode posts are located on two corresponding top covers 200, and the monitoring assembly 300 can be installed on both top covers 200.

[0121] In some embodiments, a monitoring assembly 300 may also be provided on the housing 21 to collect information within the battery cell 20. For example, the housing 21 has a fixing hole, and the monitoring assembly 300 is partially inserted into the fixing hole and sealed therewith.

[0122] The battery cell 20 provided in the embodiment of the present application monitors the information inside a single battery cell 20 in real time through the monitoring component 300 of the top cover structure 100 to identify the current health status of the battery cell 20. The monitoring component 300 is communicatively connected to the battery management device so that the monitoring component 300 can transmit the collected information inside the battery cell 20 to the battery management device, thereby facilitating the battery management device to control and manage the single battery cell 20. The monitoring component 300 is arranged on the second side of the top cover 200 and is connected to the first side. Compared with setting the monitoring component 300 entirely on the outside of the battery cell 20, it is more convenient for the monitoring component 300 to monitor the information inside the battery cell 20, and the monitoring component 300 has better accuracy and timeliness in monitoring, which can effectively prevent the occurrence of battery cell safety accidents. Compared with setting the monitoring component 300 inside the battery cell 20, the monitoring component 300 occupies less space inside the battery cell 20 and has less impact on the internal structure of the battery cell 20.

[0123] Reference Figure 9 Based on the above embodiments, an embodiment of the present application provides a battery pack, including: a battery pack shell 30 and at least one battery cell group 10 arranged in the battery pack shell 30, and the battery cell group 10 includes at least one battery cell 20.

[0124] The multiple battery cells 20 in the battery cell group 10 are stacked in sequence.

[0125] The battery pack provided in the embodiment of the present application collects information within the battery cell 20 by setting a monitoring component 300 on the top cover structure 100 of each battery cell 20. Compared with setting the monitoring component 300 on the battery pack shell 30, the monitoring component 300 has better accuracy and timeliness.

[0126] Based on the above embodiments, an embodiment of the present application provides an electrical device, including: a device body and a battery pack arranged on the device body.

[0127] Exemplarily, the electric device includes a vehicle.

[0128] The vehicle is equipped with a battery management system. Upon receiving abnormal parameter information from a battery cell 20, the battery management system can manually control the battery cell 20, for example, by accessing the battery cell abnormality monitoring and control strategy interface through diagnostic equipment, in-vehicle buttons, or multimedia screen controls. Alternatively, if the system detects that the vehicle is in motion, stationary, or charging, it can automatically trigger battery cell control and control the abnormal battery cell 20.

[0129] In the description and claims of the embodiments of the present application and the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate for the purposes of describing the embodiments of the present application. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0130] In the embodiments of the present application, the terms "upper", "lower", "inside", "middle", "outside", "front", "back", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to being constructed and operated in a specific orientation. Moreover, in addition to being used to indicate orientations or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present application can be understood based on the specific circumstances.

[0131] Furthermore, the terms "disposed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this disclosure based on the specific circumstances.

[0132] Unless otherwise stated, the term "plurality" means two or more.

[0133] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered merely as exemplary, and the scope of this application is to be limited solely by the appended claims.

Claims

1. A top cover structure for a battery cell (20), characterized in that: The top cover structure comprises: a top cover (200), the top cover (200) having a first side and a second side opposite to each other, the first side being used to face the interior of the battery cell (20); A monitoring component (300) is provided on the second side and is connected to the first side. The monitoring component (300) is used to monitor information in the battery cell (20). The monitoring component (300) is used to communicate with a battery management device.

2. The top cover structure according to claim 1, characterized in that: The monitoring assembly (300) includes a monitoring component (310), the monitoring component (310) being in communication with the first side for monitoring information within the battery cell (20), and the monitoring component (310) being in communication connection with the battery management device.

3. The top cover structure according to claim 2, characterized in that: The monitoring component (300) further includes a fixing member (320), wherein the fixing member (320) connects the monitoring member (310) and the top cover (200).

4. The top cover structure according to claim 3, characterized in that: The monitoring component (310) is located between the fixing component (320) and the top cover (200), and the fixing component (320) is connected to the top cover (200).

5. The top cover structure according to claim 4, characterized in that: The fixing member (320) is provided with an avoidance hole (321), and a portion of the monitoring member (310) extends out of the fixing member (320) through the avoidance hole (321).

6. The top cover structure according to claim 3, characterized in that: The top cover (200) has a plug hole (212), the plug hole (212) connects the first side and the second side, and part of the monitoring component (310) is inserted into the top cover (200) through the plug hole (212).

7. The top cover structure according to claim 6, characterized in that: The top cover (200) has a groove (211), the notch of the groove (211) faces the second side, the fixing member (320) is at least partially located in the groove (211), and the plug hole (212) is located in the groove (211).

8. The top cover structure according to claim 3, characterized in that: The monitoring assembly (300) further includes an insulating member (330), the fixing member (320) is at least partially located within the insulating member (330), and at least a portion of the monitoring member (310) is located between the insulating member (330) and the top cover (200).

9. The top cover structure according to claim 8, characterized in that: The insulating part (330) is an injection-molded part, and at least a portion of the fixing part (320) is injection-molded inside the insulating part (330).

10. The top cover structure according to claim 2, characterized in that: The monitoring component (300) further includes a first sealing member (340), wherein the first sealing member (340) seals and connects the monitoring member (310) and the top cover (200).

11. The top cover structure according to any one of claims 2 to 10, characterized in that: The monitoring component (310) comprises a packaging component (311), a circuit board (312), a signal collector (313) and a transmission interface (314); the circuit board (312) is encapsulated in the packaging component (311); the signal collector (313) and the transmission interface (314) are both electrically connected to the circuit board (312); the signal collector (313) is used to collect information in the battery cell (20); and the transmission interface (314) is used to communicate with the battery management device.

12. The roof structure according to any one of claims 1 to 10, characterized in that: The top cover (200) includes a top cover body (210), the top cover body (210) is provided with a plug hole (212), and part of the monitoring component (300) is inserted into the top cover body (210) through the plug hole (212).

13. The roof structure according to claim 12, characterized in that: It also includes a plastic part (230), and the plastic part (230) is used to be arranged between the top cover body (210) and the interior of the battery core (20).

14. The roof structure according to claim 13, characterized in that: The plastic part (230) has a communication hole (231), and the communication hole (231) is used to connect the plug hole (212) and the interior of the battery core (20).

15. A battery cell, characterized in that: include: A shell (21) and a top cover structure (100) according to any one of claims 1 to 14 connected to the shell (21).

16. A battery pack, characterized in that: include: A battery pack housing (30) and at least one battery cell group (10) disposed in the battery pack housing (30), wherein the battery cell group (10) includes at least one battery cell (20) according to claim 15.

17. An electrical device, characterized in that: include: A device body and the battery pack according to claim 16 disposed on the device body.

Images