Battery cell, battery pack, and electric device

Abstract

A battery cell (100), a battery pack (1000), and an electric device (10000). The battery cell comprises a casing (10), cover plate assemblies (20), an electrode core (30), and a monitoring module (20). The cover plate assemblies are disposed in the casing and match the casing to form an inner cavity, the electrode core and the monitoring module are both disposed in the inner cavity, and the monitoring module is electrically connected to the electrode core.

Description

Battery cells, battery packs and electrical devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application "Battery Cell, Battery Pack and Electrical Device" with application number 2024204133957 and application date on February 29, 2024, and the Chinese patent application "Battery Cell, Battery Pack and Electrical Device" with application number 2024110707633 and application date on August 5, 2024, and claims the priority of the above-mentioned Chinese patent applications. The entire contents of the above-mentioned Chinese patent applications are hereby introduced into this application as a reference. Technical Field

[0003] The present application belongs to the field of battery cell technology, and specifically relates to a battery cell, a battery pack, and an electrical device. Background Art

[0004] In recent years, batteries have gradually entered people's daily lives, making people's food, clothing, housing and transportation more convenient.

[0005] During battery operation, temperature changes and gas production inside the battery will affect battery safety. In related technologies, monitoring of the battery's operating status is usually done through fuzzy inference, and the accuracy of the results is extremely low.

[0006] Therefore, how to effectively monitor the working status of the battery has become a technical problem that needs to be solved urgently. Summary of the Invention

[0007] To this end, the present application proposes a battery cell that can monitor its own working status, improve the safety of the battery cell, and solve the technical problem of low accuracy in monitoring the working status of the battery cell in the prior art.

[0008] According to the battery cell of the embodiment of the present application, it includes: a shell; a cover plate assembly, which is arranged on the shell and cooperates with the shell to form an inner cavity; a pole core and a monitoring module, the pole core and the monitoring module are both arranged in the inner cavity, and the monitoring module is electrically connected to the pole core.

[0009] According to the battery cell of the embodiment of the present application, by setting up a monitoring module and setting the monitoring module to be electrically connected to the pole core, a loop can be formed between the monitoring module and the pole core, so that the pole core can supply power to the monitoring module, making it convenient to use the monitoring module to monitor the performance indicators of the pole core. While improving the accuracy of the monitoring results, it can also improve the safety of the battery cell and extend the service life of the battery cell.

[0010] Optionally, a pole is provided on the cover plate assembly, the pole core has a pole ear, the pole ear is electrically connected to the pole, and the monitoring module is electrically connected to the pole ear or the pole.

[0011] Optionally, the battery cell further includes a lead-out plate, a pole is provided on the cover plate assembly, and the pole core has a pole lug, which is electrically connected to the pole through the lead-out plate.

[0012] Optionally, the lead-out tabs include two, the tabs include a positive tab and a negative tab, the poles include a positive pole pole and a negative pole pole, the positive tab is electrically connected to the positive pole pole through one of the lead-out tabs, and the negative tab is electrically connected to the negative pole pole through the other lead-out tab.

[0013] Optionally, the monitoring module is electrically connected to the lead-out piece.

[0014] Optionally, the battery cell further includes a conductive member, one end of the conductive member is electrically connected to the monitoring module, and the other end of the conductive member is electrically connected to the pole core.

[0015] Optionally, the conductive member includes a first conductive member and a second conductive member, the pole core has a positive pole tab and a negative pole tab, the positive pole tab and the negative pole tab are respectively arranged on opposite sides of the pole core in a first direction, the monitoring module is arranged on one side of the pole core in the first direction, the second conductive member connects the monitoring module and the positive pole tab or the negative pole tab located on one side of the pole core, and the first conductive member connects the monitoring module and the positive pole tab or the negative pole tab located on the other side of the pole core.

[0016] Optionally, the battery cell further includes a first side plate and a second side plate, the first side plate and the second side plate are respectively arranged on opposite sides of the pole core in a second direction, and the second direction intersects with the first direction; the first conductive member is at least partially embedded or preset inside the first side plate and / or the second side plate.

[0017] Optionally, the cover plate assembly includes two, and the two cover plate assemblies are respectively arranged corresponding to the positive electrode tab and the negative electrode tab, the cover plate assembly corresponding to the positive electrode tab is provided with a positive electrode pole electrically connected to the positive electrode tab, and the cover plate assembly corresponding to the negative electrode tab is provided with a negative electrode pole electrically connected to the negative electrode tab; the first side plate and the second side plate are connected between the two cover plate assemblies.

[0018] Optionally, the pole core has a positive pole tab and a negative pole tab, and the positive pole tab and the negative pole tab are arranged on the same side of the pole core in the first direction. The cover plate assembly includes one, and the cover plate assembly is arranged opposite the positive pole tab and the negative pole tab. A positive pole column and a negative pole column are provided on the cover plate assembly, and the positive pole tab is electrically connected to the positive pole column, and the negative pole tab is electrically connected to the negative pole column.

[0019] Optionally, the monitoring module is fixed to a side of the cover assembly facing the inner cavity, and the conductive member is fixed to the cover assembly and electrically connected to the monitoring module.

[0020] Optionally, a receiving groove is provided on a side of the cover assembly facing the inner cavity, and the receiving groove is used to receive and fix the monitoring module and part of the conductive member.

[0021] Optionally, the battery cell further includes a spacer, the spacer is fixed between the cover plate assembly and the pole core, and the monitoring module is fixed to the cover plate assembly or the spacer.

[0022] Optionally, the monitoring module is fixed to the spacer, the spacer includes a hollow area, the battery core includes a conductive member, one end of the conductive member is electrically connected to the monitoring module, and the other end of the conductive member passes through the hollow area and is welded to the pole core; and / or, at least part of the conductive member is embedded in the spacer.

[0023] Optionally, the spacer is provided with a buckle, and the monitoring module is snapped onto the spacer via the buckle.

[0024] Optionally, the conductive member includes a laser welding portion, and the monitoring module is electrically connected to the pole core via the laser welding portion.

[0025] Optionally, the monitoring module includes one or more of a chip, a processor and an integrated circuit.

[0026] Optionally, the monitoring module is provided with an inductive conductive tape, which is inserted into the pole core and electrically connected to the pole core to monitor performance data of the battery core.

[0027] A battery pack according to an embodiment of the present application includes: a plurality of battery cells, wherein the battery cells are the aforementioned battery cells; and a tray, wherein the plurality of battery cells are arranged in the tray.

[0028] According to the battery pack of the embodiment of the present application, the safety of the battery pack can be improved by adopting the battery cells of the aforementioned embodiment.

[0029] According to an embodiment of the present application, the electric device includes the aforementioned battery cell or the aforementioned battery pack, and the battery cell or the battery pack is electrically connected to the electric device to supply power to the electric device.

[0030] According to the electric device of the embodiment of the present application, by adopting the battery cell or battery pack of the aforementioned embodiment, the operating performance of the electric device can be ensured while the safety of the electric device can be improved.

[0031] Additional aspects and advantages of the present application will become apparent from the following description or may be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0033] FIG1 is a schematic diagram of the exploded structure of a battery cell provided in some embodiments of the first aspect of the present application;

[0034] FIG2 is a schematic diagram of a battery cell structure provided in some embodiments of the first aspect of the present application;

[0035] FIG3 is a schematic structural diagram of a battery cell provided in some embodiments of the first aspect of the present application from another angle;

[0036] FIG4 is a schematic structural diagram of a battery cell before installation provided in some embodiments of the first aspect of the present application;

[0037] FIG5 is a partial enlarged view of a battery cell before installation provided in some embodiments of the first aspect of the present application;

[0038] FIG6 is a partial structural diagram of a first cover plate assembly provided in some embodiments of the first aspect of the present application;

[0039] FIG7 is a cross-sectional view along line AA of FIG6;

[0040] FIG8 is a perspective schematic diagram of FIG6;

[0041] FIG9 is a perspective schematic diagram of FIG6 with some structures omitted;

[0042] FIG10 is an enlarged view of area I in FIG9 ;

[0043] FIG11 is a partial structural diagram of a second cover plate assembly provided in some embodiments of the first aspect of the present application;

[0044] FIG12 is a cross-sectional view of FIG11 along line BB;

[0045] FIG13 is a perspective schematic diagram of FIG11;

[0046] FIG14 is a perspective schematic diagram of FIG11 with some structures omitted;

[0047] FIG15 is an enlarged view of region II in FIG14 ;

[0048] FIG16 is a schematic diagram of the cover plate assembly and the first side plate and the second side plate in some embodiments of the first aspect of the present application;

[0049] FIG17 is an enlarged view of a portion of the structure in FIG16 ;

[0050] FIG18 is an enlarged view of another part of the structure in FIG16;

[0051] FIG19 is a schematic structural diagram of a battery cell before installation provided in some embodiments of the second aspect of the present application;

[0052] FIG20 is a partial structural diagram of a second cover plate assembly provided in some embodiments of the second aspect of the present application;

[0053] FIG21 is a schematic diagram of the cover plate assembly and the first side plate and the second side plate in some embodiments of the second aspect of the present application;

[0054] FIG22 is an enlarged view of part of the structure in FIG21;

[0055] FIG23 is an enlarged view of region III in FIG22 ;

[0056] Figure 24 is a front view of Figure 22;

[0057] FIG25 is a schematic diagram of an electrical device in some embodiments of the present application.

[0058] Figures: 100, battery cell; 10, housing; 20, cover assembly; 20a, first cover assembly; 20b, second cover assembly; 21, pole; 21a, first pole; 21b, second pole; 22, body; 22a, first body; 22b, second body; 23, cover spacer; 23a, first cover spacer; 23b, second cover spacer; 24, liquid filling port; 25, explosion-proof valve; 26a, first card slot; 26b, second card slot; 211, lead-out piece; 211a, first lead-out piece; 211b, second lead-out piece; 212a, first groove; 212b, second groove; 30, pole Core; 31, pole ear; 31a, first pole ear; 31b, second pole ear; 40, spacer; 40a, first spacer; 40b, second spacer; 50, monitoring module; 70, conductive member; 71, first conductive member; 71c, first foil; 71b, wire; 71a, second foil; 72, second conductive member; 60a, first side panel; 60b, second side panel; 80, buckle; 81, female buckle; 82, female buckle; 1000, battery pack; 10000, electrical device. DETAILED DESCRIPTION

[0059] To facilitate understanding of the present application, a more comprehensive description of the present application will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0060] The following descriptions of the embodiments are with reference to the attached diagrams, which illustrate specific embodiments that the present application can be used to implement. The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application include direct and indirect connections unless otherwise specified. The directional terms mentioned in this application, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of this application, unless otherwise specified, "multiple" means two or more.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0062] The battery cell 100 according to an embodiment of the present application will be described below with reference to the accompanying drawings.

[0063] As shown in FIG1 , a battery cell 100 according to an embodiment of the present application includes: a housing 10 , a cover assembly 20 , a pole core 30 and a monitoring module 50 .

[0064] The cover assembly 20 is disposed on the housing 10 and cooperates with the housing 10 to form an inner cavity.

[0065] In some embodiments, the shell 10 is provided with an opening, and the cover assembly 20 can cover the opening on the shell 10, so that the shell 10 and the cover assembly 20 together form an inner cavity, thereby reducing the difficulty of forming the inner cavity.

[0066] The pole core 30 and the monitoring module 50 are both disposed in the inner cavity, and the monitoring module 50 is electrically connected to the pole core 30 .

[0067] Among them, by electrically connecting the monitoring module 50 to the pole core 30, a loop can be formed between the monitoring module 50 and the pole core 30, so that the pole core 30 can be used to power the monitoring module 50. At this time, the monitoring module 50 can collect and store performance indicators such as gas production, temperature and pressure inside the battery cell 100, and can also wirelessly transmit the collected performance data of the battery cell 100 to other terminals, which will analyze and process the performance data of the battery cell 100 to achieve the performance indicators of the monitoring pole core 30. While improving the accuracy of the monitoring results, it can also improve the safety of the battery cell 100.

[0068] At the same time, by arranging both the pole core 30 and the monitoring module 50 in the inner cavity, on the one hand, the monitoring module 50 can be arranged close to the pole core 30, thereby facilitating the electrical connection between the monitoring module 50 and the pole core 30 and reducing the difficulty of the electrical connection between the monitoring module 50 and the pole core 30; on the other hand, the shell 10 and the cover assembly 20 can be used to cooperate in protecting and fixing the pole core 30 and the monitoring module 50, thereby extending the service life of the pole core 30 and the monitoring module 50, and helping to improve the position stability of the pole core 30 and the monitoring module 50, thereby ensuring the working performance of the pole core 30 and the monitoring module 50 to a certain extent.

[0069] In some embodiments, the pole core 30 is fixed in the inner cavity. This means that the pole core 30 is disposed in the inner cavity and is fixedly connected to the inner cavity, so that the housing 10 and the cover assembly 20 cooperate to protect and fix the pole core 30. The fixed connection mentioned here can be bonding, clamping, etc.

[0070] It can be seen from the above structure that the battery cell 100 of the embodiment of the present application, by setting a monitoring module 50, and setting the monitoring module 50 in the inner cavity and electrically connecting it to the pole core 30, can form a loop between the monitoring module 50 and the pole core 30, so as to realize the use of the pole core 30 to power the monitoring module 50. At this time, the monitoring module 50 can collect and store performance indicators such as gas production, temperature and pressure inside the battery cell 100, and can also wirelessly transmit the collected performance data of the battery cell 100 to other terminals, which analyze and process the performance data of the battery cell 100 to achieve the performance indicators of monitoring the pole core 30. While improving the accuracy of the monitoring results, it can also improve the safety of use of the battery cell 100.

[0071] It is understandable that, compared with the prior art, the present application adopts the monitoring module 50 to monitor the performance indicators of the pole core 30 to improve the accuracy of the monitoring results, which is conducive to ensuring the safety of the battery cell 100.

[0072] In some embodiments, as shown in FIG1 , a pole 21 is provided on the cover plate assembly 20, and the pole core 30 has a pole lug 31, which is electrically connected to the pole 21, and the monitoring module 50 is electrically connected to the pole lug 31 or the pole 21. Here, it means that the monitoring module 50 can be electrically connected to the pole lug 31 or to the pole 21. Since the pole lug 31 is electrically connected to the pole 21, the electrical connection between the monitoring module 50 and the pole lug 31 is achieved, that is, the electrical connection between the monitoring module 50 and the pole core 30 is achieved, thereby forming a loop between the monitoring module 50 and the pole core 30, so as to realize the use of the pole core 30 to power the monitoring module 50, facilitate the use of the monitoring module 50 to monitor the performance indicators of the pole core 30, reduce the difficulty of monitoring, and improve the accuracy of monitoring.

[0073] In addition, by electrically connecting the tab 31 to the pole 21, the electrical device 10000 can be electrically connected to the pole core 30 through the pole 21, thereby facilitating the use of the battery cell 100 to power the electrical device 10000 and ensuring the working performance of the battery cell 100 to a certain extent.

[0074] In some embodiments, as shown in Figure 1, the pole ear 31 extends toward the cover plate assembly 20 so that the pole ear 31 can be set close to the pole 21, thereby facilitating the electrical connection between the pole ear 31 and the pole 21, reducing the difficulty of electrical connection between the pole ear 31 and the pole 21, so that the electrical device 10000 can be electrically connected to the pole core 30 through the pole 21, and then facilitating the use of the battery cell 100 to power the electrical device 10000, thereby ensuring the working performance of the battery cell 100 to a certain extent.

[0075] In summary, the battery cell 100 can be electrically connected to the electrical device 10000 through the tab 31 to form a loop to meet the power demand of the electrical device 10000.

[0076] In some embodiments, as shown in FIG1 , the cover assembly 20 includes a main body 22, and the pole 21 is embedded in the main body 21. This allows the pole 21 to be arranged on the cover assembly 20, facilitates the use of the main body 21 to support the pole 21, improves the positional stability of the pole 21, and ensures the working performance of the pole 21 to a certain extent.

[0077] In some embodiments, as shown in FIG1 , the battery cell 100 further includes a lead-out tab 211 , the cap assembly 20 is provided with a pole 21 , and the pole core 30 has a tab 31 , which is electrically connected to the pole 21 via the lead-out tab 211 . This allows for electrical connection between the tab 31 and the pole 21 and reduces the difficulty of electrical connection between the tab 31 and the pole 21 .

[0078] In addition, compared with directly electrically connecting the pole tab 31 to the columnar pole 21, the contact surface area of ​​the lead-out piece 211 is larger. Fixing the pole tab 31 on the lead-out piece 211 makes the connection between the pole tab 31 and the pole 21 more reliable. At the same time, the larger contact area can reduce the resistance between the pole tab 31 and the pole 21, thereby reducing the energy loss in the process of transmitting electricity through the pole 21 to the electrical device 10000.

[0079] In some embodiments, as shown in FIG. 1 , the lead-out piece 211 is located at one end of the pole 21 facing the pole core 30 , and the pole tab 31 is fixedly connected to the lead-out piece 211 on the pole 21 .

[0080] In some embodiments, the lead-out tabs 211 include two, the electrode core 30 includes a positive electrode tab and a negative electrode tab, and the electrode post 21 includes a positive electrode post and a negative electrode post. The positive electrode tab is electrically connected to the positive electrode post via one of the lead-out tabs 211, and the negative electrode tab is electrically connected to the negative electrode post via the other lead-out tab 211. This achieves electrical connection between the positive electrode tab and the positive electrode post, and between the negative electrode tab and the negative electrode post, and reduces the difficulty of electrical connection between the positive electrode tab and the positive electrode post, and reduces the difficulty of electrical connection between the negative electrode tab and the negative electrode post. As a result, the battery cell 100 can be electrically connected to the electrical device 10000 via the electrode post 21, making it easier to use the battery cell 100 to provide electrical energy to the electrical device 10000, thereby ensuring the working performance of the electrical device 10000 to a certain extent.

[0081] The positive electrode tab and the negative electrode tab mentioned here can be understood as the first tab 31a and the second tab 31b shown in FIG4 , and the positive electrode column and the negative electrode column can be understood as the first column 21a and the second column 21b shown in FIG4 .

[0082] In some embodiments, in combination with Figures 1, 6 and 11, the two lead-out tabs 211 are respectively the first lead-out tab 211a and the second lead-out tab 211b, the positive electrode tab is electrically connected to the positive electrode post through the first lead-out tab 211a, and the negative electrode tab is electrically connected to the negative electrode post through the second lead-out tab 211b, so that the battery cell 100 can be electrically connected to the electrical device 10000 through the post 21.

[0083] In some embodiments, the monitoring module 50 is electrically connected to the lead-out tab 211. Since the lead-out tab 211 is electrically connected to the tab 31 and the pole 21, respectively, by electrically connecting the monitoring module 50 to the lead-out tab 211, the monitoring module 50 can be electrically connected to the tab 31, so that a loop can be formed between the monitoring module 50 and the pole core 30, so as to realize the use of the pole core 30 to power the monitoring module 50 and reduce the difficulty of the electrical connection between the monitoring module 50 and the pole tab 31.

[0084] At the same time, since the contact surface area of ​​the lead-out piece 211 is larger, electrically connecting the monitoring module 50 to the lead-out piece 211 can make the connection between the monitoring module 50 and the tab 31 more reliable.

[0085] Optionally, the monitoring module 50 is electrically connected to the two lead-out pieces 211 respectively, that is, the monitoring module 50 is electrically connected to the first lead-out piece 211a and the second lead-out piece 211b respectively, so that the monitoring module 50 can be electrically connected to the positive pole tab and the negative pole tab respectively, thereby realizing the electrical connection between the monitoring module 50 and the pole core 30, so that a loop can be formed between the monitoring module 50 and the pole core 30, so as to realize the use of the pole core 30 to power the monitoring module 50.

[0086] In some embodiments, as shown in FIG1 , the battery cell 100 further includes a conductive member 70, one end of which is electrically connected to the monitoring module 50, and the other end of which is electrically connected to the pole core 30. This allows for an electrical connection between the monitoring module 50 and the pole core 30, reducing the difficulty of the electrical connection between the monitoring module 50 and the pole core 30, and enabling a circuit to be formed between the monitoring module 50 and the pole core 30 to provide power to the monitoring module 50.

[0087] In some embodiments, the other end of the conductive member 70 is electrically connected to the lead-out piece 211, the tab 31 and / or the pole 21. Here, it means that the other end of the conductive member 70 is electrically connected to the lead-out piece 211; or, the other end of the conductive member 70 is electrically connected to the tab 31; or, the other end of the conductive member 70 is electrically connected to the pole 21; or, the other end of the conductive member 70 is electrically connected to the lead-out piece 211 and the tab 31; or, the other end of the conductive member 70 is electrically connected to the lead-out piece 211 and the pole 21; or, the other end of the conductive member 70 is electrically connected to the tab 31 and the pole 21; or, the other end of the conductive member 70 is electrically connected to the tab 31 and the pole 21; so as to realize the electrical connection between the guide member 70 and the pole core 30, and further realize the electrical connection between the monitoring module 50 and the pole core 30.

[0088] The electrical connection between the other end of the conductive member 70 and the lead-out piece 211 , the tab 31 and / or the pole 21 may be achieved by welding.

[0089] In some examples, the other end of the conductive member 70 is connected to the lead-out piece 211 . Since the lead-out piece 211 has a certain area, the monitoring module 50 and the tab 31 can have higher reliability.

[0090] In some examples, the pole 21 is electrically connected to the pole tab 31 through the lead-out piece 211, and the conductive member 70 is fixed to the cover plate assembly 20 and welded to the lead-out piece 211. That is, one end of the conductive member 70 is electrically connected to the monitoring module 50, and the other end of the conductive member 70 is welded to the lead-out piece 211. At this time, the conductive member 70 is electrically connected to the pole tab 31 through the lead-out piece 211, and the lead-out piece 211 can increase the contact area between the pole tab 31 and the conductive member 70, thereby improving the conductive effect and connection strength between the pole tab 31 and the conductive member 70, thereby making the connection between the monitoring module 50 and the pole tab 31 reliable.

[0091] In some embodiments, the conductive member 70 includes a laser weld portion, and the monitoring module 50 is electrically connected to the pole core 30 via the laser weld portion. This means that the monitoring module 50 is electrically connected to the pole core 30 via the laser weld portion, thereby achieving an electrical connection between the monitoring module 50 and the pole core 30, reducing the difficulty of connecting the monitoring module 50 to the pole core 30, and ensuring the reliability of the connection between the monitoring module 50 and the pole core 30 to a certain extent, which is conducive to ensuring the working performance of the monitoring module 50.

[0092] In some embodiments, the laser welding portion is fixedly connected to the lead-out piece 211 , the electrode tab 31 and / or the electrode post 21 , so that the monitoring module 50 can be electrically connected to the electrode core 30 through the laser welding portion.

[0093] In some embodiments, the material of the positive electrode tab and the positive electrode column is aluminum, and the material of the negative electrode tab and the negative electrode column is nickel-plated copper. When the conductive member 70 forms an electrical connection with the positive electrode tab, the material of the conductive member 70 is the same as the material of the positive electrode tab. When the conductive member 70 forms an electrical connection with the negative electrode tab, the material of the conductive member 70 is the same as the material of the negative electrode tab.

[0094] That is, the conductive member 70 electrically connected to the positive electrode tab is made of aluminum, and the conductive member 70 electrically connected to the negative electrode tab is made of nickel-plated copper.

[0095] In some embodiments, as shown in Figure 1, the conductive member 70 includes a first conductive member 71 and a second conductive member 72, the pole core 30 has a positive pole tab and a negative pole tab, and the positive pole tab and the negative pole tab are respectively arranged on opposite sides of the pole core 30 in the first direction. The monitoring module 50 is arranged on one side of the pole core 30 in the first direction. The second conductive member 72 connects the monitoring module 50 and the positive pole tab or the negative pole tab located on one side of the pole core 30, and the first conductive member 71 connects the monitoring module 50 and the positive pole tab or the negative pole tab located on the other side of the pole core 30. Among them, the first direction mentioned here can be understood as the X direction shown in Figure 1, that is, when the positive pole tab and the negative pole tab are respectively arranged on the opposite sides of the pole core 30 in the first direction, the second conductive member 72 of the conductive member 70 connects the monitoring module 50 and the positive pole tab or the negative pole tab on the same side as the monitoring module 50, and the first conductive member 71 of the conductive member 70 connects the monitoring module 50 and the positive pole tab or the negative pole tab on the opposite sides of the monitoring module 50, so that a loop can be formed between the monitoring module 50 and the pole core 30 to realize power supply to the monitoring module 50.

[0096] In some embodiments, when the second conductive member 72 connects the monitoring module 50 and the positive electrode tab, the first conductive member 71 connects the monitoring module 50 and the negative electrode tab; when the second conductive member 72 connects the monitoring module 50 and the negative electrode tab, the first conductive member 71 connects the monitoring module 50 and the positive electrode tab, thereby achieving conductive coordination between the monitoring module 50 and the electrode core 30.

[0097] In some embodiments, the first conductive member 71 extends along the first direction so that the first conductive member 71 can conduct electricity between the monitoring module 50 and the positive electrode tab or the negative electrode tab located on opposite sides of the monitoring module 50 .

[0098] In some embodiments, as shown in FIG1 , the battery cell 100 further includes a first side plate 60 a and a second side plate 60 b , which are respectively disposed on opposite sides of the pole core 30 in a second direction, where the second direction intersects the first direction. The second direction referred to herein can be understood as the Y direction shown in FIG1 . That is, the first side plate 60 a and the second side plate 60 b are respectively disposed on opposite sides of the pole core 30 in the Y direction. This can, to a certain extent, prevent interference between the first side plate 60 a and the second side plate 60 b and the tab 30 , thereby ensuring the working performance of the tab 30 .

[0099] At the same time, by arranging the first side plate 60a and the second side plate 60b on the opposite sides of the pole core 30 in the Y direction, the first side plate 60a and the second side plate 60b can also be used to cooperate to support and protect the pole core 30, thereby extending the service life of the pole core 30 and improving the structural stability of the pole core 30, thereby ensuring the working performance of the pole core 30 to a certain extent.

[0100] In some embodiments, the first conductive member 71 is at least partially embedded or pre-set within the first side plate 60a. Because the first conductive member 71 conducts electricity between the monitoring module 50 and the positive or negative electrode tab on the other side of the electrode core 30, the extension path of the first conductive member 71 is relatively long. By embedding or pre-setting the first conductive member 71 at least partially within the first side plate 60a, the assembly step of arranging the first conductive member 71 within the inner cavity can be omitted. Moreover, when the housing 10 is installed, the first conductive member 71 disposed within the first side plate 60a is less likely to come into contact with the housing 10, thereby preventing, to a certain extent, the first conductive member 71 from breaking due to contact with the housing 10.

[0101] At the same time, the above arrangement can also prevent the first conductive member 71 from shifting after the battery cell 100 is injected with electrolyte, thereby ensuring the performance of the first conductive member 71 and extending the service life of the first conductive member 71 to a certain extent.

[0102] Of course, in some other embodiments, at least a portion of the first conductive member 71 may also be pre-embedded or preset inside the second side plate 60 b.

[0103] In other embodiments, the first conductive member 71 is at least partially embedded or pre-set inside the first side plate 60a and the second side plate 60b. In other words, the wire 71b can also be embedded or pre-set inside the first side plate 60a and the second side plate 60b. In this way, the first side plate 60a and the second side plate 60b cooperate to fix the first conductive member 71, making it easier for the first conductive member 71 to contact the housing 10, thereby preventing the first conductive member 71 from breaking due to contact with the housing 10.

[0104] In addition, in one embodiment, the number of the first side plates 60a and the second side plates 60b can be multiple, and the first conductive member 71 is at least partially embedded or preset inside the multiple first side plates 60a and / or the multiple second side plates 60b. At this time, the first conductive members 71 on the multiple first side plates 60a and / or the multiple second side plates 60b can all conduct electricity to the monitoring module 50 and the positive pole tab or the negative pole tab located on the other side of the pole core 30.

[0105] In some embodiments, in combination with Figures 1, 5 and 11, the first conductive member 71 includes a wire 71b, a first foil 71c and a second foil 71a. The first foil 71c, the wire 71b and the second foil 71a are electrically connected in sequence to form the first conductive member 71. The second foil 71a is electrically connected to the monitoring module 50. The wire 71b extends along the first direction. The first foil 71c is electrically connected to the positive pole tab or the negative pole tab located on the other side of the pole core 30, thereby realizing the electrical connection between the monitoring module 50 and the positive pole tab or the negative pole tab located on the other side of the pole core 30, reducing the difficulty of electrical connection.

[0106] In some embodiments, as shown in Figures 16 and 17, the wire 71b is embedded in the first side plate 60a, so that the first side plate 60a and the wire 71b are integrated into one component, eliminating the assembly step of arranging the wire 71b in the inner cavity, and when the shell 10 is mounted, the wire 71b arranged in the first side plate 60 is not easy to contact the shell 10, which can avoid the wire 71b from breaking due to contact with the shell 10.

[0107] At the same time, the wire 71 b can be prevented from shifting after the electrolyte is injected into the battery cell 100 .

[0108] Of course, in another embodiment, the wire 71b may also be embedded in the second side plate 60b.

[0109] In some embodiments, as shown in Figure 4, the cover plate assembly 20 includes two, and the two cover plate assemblies 20 are respectively arranged corresponding to the positive electrode tab and the negative electrode tab. The cover plate assembly 20 corresponding to the positive electrode tab is provided with a positive electrode column electrically connected to the positive electrode tab, and the cover plate assembly 20 corresponding to the negative electrode tab is provided with a negative electrode column electrically connected to the negative electrode tab. What this means is that when the positive pole tab and the negative pole tab of the electrode core 30 are respectively located on opposite sides of the electrode core 30, the battery cell 100 has two cover plate assemblies 20, and the two cover plate assemblies 20 are respectively located on opposite sides of the electrode core 30 and are arranged corresponding to the positive pole tab and the negative pole tab, and a positive pole post is provided on the cover plate assembly 20 corresponding to the positive pole tab, and a negative pole post is provided on the cover plate assembly 20 corresponding to the negative pole tab, so as to facilitate the electrical connection between the positive pole tab and the positive pole post and the electrical connection between the negative pole tab and the negative pole post, so that the battery cell 100 can be electrically connected to the electrical device 10000 through the pole 21, so as to facilitate the use of the battery cell 100 to provide electrical energy to the electrical device 10000, so as to ensure the working performance of the electrical device 10000 to a certain extent.

[0110] In some examples, as shown in Figure 1, the battery cell 100 includes two cover assemblies 20 and two pole tabs 31, and a pole 21 is respectively provided on the main body 22 of the two cover assemblies 20, and the cover assemblies 20 and the pole tabs 31 are arranged on both sides of the pole core 30, and different pole tabs 31 extend toward different poles 21. The pole tabs 31 are electrically connected to the poles 21 on the main body 22, so that the pole core 30 is conductively connected to the poles 21 through the pole tabs 31, so that the battery cell 100 can supply power to the electrical device 10000 through the poles 21.

[0111] In some examples, as shown in Figures 1, 2 and 3, the two cover plate assemblies 20 are respectively a first cover plate assembly 20a and a second cover plate assembly 20b, and a first pole 21a and a second pole 21b are respectively provided on the first body 22a of the first cover plate assembly 20a and the second body 22b of the second cover plate assembly 20b.

[0112] As shown in Figures 4 and 5, the first pole tab 31a is located on the side of the pole core 30 facing the first body 22a and extends toward the first body 22a. The first pole tab 31a is fixedly connected to the first lead-out piece 211a on the first body 22a (the specific structure of the first lead-out piece 211a can be seen in Figures 6, 8 and 9). The second pole tab 31b is located on the side of the pole core 30 facing the second body 22b and extends toward the second body 22b. The second pole tab 31b is fixedly connected to the second lead-out piece 211b on the second body 22b (the specific structure of the second lead-out piece 211b can be seen in Figures 11, 13 and 14), so that the battery cell 100 can be electrically connected to the electrical device 10000 through the pole 21.

[0113] In addition, it should be pointed out that Figure 4 shows a schematic diagram of the cover assembly 20 not yet fixedly connected to the shell 10. At this time, the pole ear 31 has not been folded and is in a straight state. When the cover assembly 20 is fixedly connected to the shell 10, the pole ear 31 is in a folded state.

[0114] In some embodiments, as shown in Figures 1, 16, and 21, the first side plate 60a and the second side plate 60b are connected between the two cover plate assemblies 20. At this time, a receiving space for the pole core 30 is formed between the first side plate 60a, the second side plate 60b, and the two cover plate assemblies 20.

[0115] At the same time, the first side panel 60a and the second side panel 60b are connected between the two cover panel assemblies 20, which can also enable the first side panel 60a, the second side panel 60b and the two cover panel assemblies 20 to support each other, thereby improving the positional stability of the first side panel 60a, the second side panel 60b and the two cover panel assemblies 20, and ensuring the working performance of the first side panel 60a, the second side panel 60b and the two cover panel assemblies 20 to a certain extent.

[0116] It should be noted that when two cover plate assemblies 20 are provided, one end of the second conductive member 72 is electrically connected to the monitoring module 50, and the other end of the second conductive member 72 can be electrically connected to the pole 21 or the lead-out piece 211 located on one side of the pole core 30. One end of the first conductive member 71 is electrically connected to the monitoring module 50, and the other end of the first conductive member 71 can be electrically connected to the pole 21 or the lead-out piece 211 located on the other side of the pole core 30. In this way, a loop can be formed between the monitoring module 50 and the pole core 30 to realize power supply to the monitoring module 50.

[0117] That is to say, the monitoring module 50 and the pole core 30 can be electrically connected through various configuration methods of the conductive member 70 to achieve normal operation of the monitoring module 50 .

[0118] In one embodiment, as shown in FIG. 2 , a liquid injection port 24 is provided on the first body 22 a . The liquid injection port 24 is connected to the inner cavity and is used to inject electrolyte into the inner cavity.

[0119] Of course, in another embodiment, the liquid injection port 24 can also be provided on the second main body 22 b or the shell 10 , and the specific position of the liquid injection port 24 can be set according to the position of the battery cell 100 when injecting liquid.

[0120] It should be noted that gas is generated during the operation of the battery cell 100 . Excessive gas will cause excessive pressure in the inner cavity, thereby affecting the safety of the battery cell 100 .

[0121] To address the issue of excessive gas causing excessive pressure in the inner cavity, as shown in FIG3 , the present application provides an explosion-proof valve 25 on the second body 22 b. The explosion-proof valve 25 connects the inner cavity with the outside world and, when opened, releases the gas in the inner cavity. This, to a certain extent, prevents the battery cell 100 from exploding due to excessive pressure, thereby improving the safety of the battery cell 100.

[0122] Of course, in another embodiment, the explosion-proof valve 25 can also be provided on the first body 22a or the housing 10, and the specific position of the explosion-proof valve 25 can be set according to the position of the battery cell 100 during liquid injection.

[0123] In some embodiments, the electrode core 30 has a positive electrode tab and a negative electrode tab, and the positive electrode tab and the negative electrode tab are arranged on the same side of the electrode core 30 in the first direction. The cover plate assembly 20 includes one, and the cover plate assembly 20 is arranged opposite the positive electrode tab and the negative electrode tab. A positive electrode column and a negative electrode column are provided on the cover plate assembly 20, and the positive electrode tab is electrically connected to the positive electrode column, and the negative electrode tab is electrically connected to the negative electrode column. What is meant here is that it is not limited to setting up two cover plate assemblies 20, and the battery cell 100 can also be set to include a cover plate assembly 20. When the battery cell 100 has a cover plate assembly 20, the cover plate assembly 20 is arranged on one side of the pole core 30, and the positive pole tab and the negative pole tab of the pole core 30 are both located on the side of the pole core 30 facing the cover plate assembly 20. After electrically connecting the positive pole tab of the pole core 30 to the corresponding positive pole post on the cover plate assembly 20 and electrically connecting the negative pole tab of the pole core 30 to the corresponding negative pole post on the cover plate assembly 20, the battery cell 100 can also be electrically connected to the electrical device 10000 through the pole post 21, so as to facilitate the use of the battery cell 100 to provide electrical energy to the electrical device 10000, so as to ensure the working performance of the electrical device 10000 to a certain extent.

[0124] In some examples, the battery cell 100 includes a cover assembly 20, two poles 21 are provided on the cover assembly 20, and the pole core 30 includes two pole ears 31. The two pole ears 31 are both located on the side of the pole core 30 facing the cover assembly 20 and extend toward the cover assembly 20. The two pole ears 31 are electrically connected to the corresponding poles 21 respectively.

[0125] In some embodiments, as shown in conjunction with Figures 4, 11, and 13, the monitoring module 50 is fixed to the side of the cover assembly 20 facing the inner cavity, and the conductive member 70 is fixed to the cover assembly 20 and electrically connected to the monitoring module 50. In other words, the monitoring module 50 and the conductive member 70 are both provided on the cover assembly 20, and the conductive member 70 is electrically connected to the monitoring module 50. Since the conductive member 70 is electrically connected to the pole core 30, the electrical connection between the monitoring module 50 and the pole core 30 is achieved, reducing the difficulty of the electrical connection between the monitoring module 50 and the pole core 30, so that a loop can be formed between the monitoring module 50 and the pole core 30 to realize power supply to the monitoring module 50.

[0126] In addition, by fixing the monitoring module 50 to the side of the cover assembly 20 facing the inner cavity, while facilitating the use of the shell 10 and the cover assembly 20 to cooperate in protecting the monitoring module 50, the cover assembly 20 can also be used to support the monitoring module 50, reducing the difficulty of fixing the monitoring module 50 and improving the position stability of the monitoring module 50, thereby ensuring the working performance of the monitoring module 50 to a certain extent, facilitating the use of the monitoring module 50 to monitor the performance indicators of the pole core 30, improving the accuracy of the monitoring results, and at the same time improving the safety of use of the battery cell 100.

[0127] In some examples, the monitoring module 50 is fixed on the cover assembly 20, the cover assembly 20 is provided with a pole 21, and the pole 21 is provided with a lead-out piece 211 at one end facing the inner cavity, and the lead-out piece 211 is electrically connected between the pole 21 and the pole ear 31. The conductive member 70 is fixed to the cover assembly 20, one end of the conductive member 70 extends toward the lead-out piece 211 and is electrically connected to the lead-out piece 211, and the other end is electrically connected to the monitoring module 50, so that the pole core 30 and the monitoring module 50 are conductive to realize power supply of the monitoring module 50.

[0128] In some examples, as shown in Figures 8, 11 and 13, the monitoring module 50 and the second conductive member 72 are both arranged on the second main body 22b, one end of the second conductive member 72 is electrically connected to the monitoring module 50, and the other end is welded to the second lead-out piece 211b, one end of the first conductive member 71 is electrically connected to the monitoring module 50, and the other end extends toward the first main body 22a and is welded to the first lead-out piece 211b provided on the first main body 22a, so that a loop can be formed between the monitoring module 50 and the pole core 30 to realize power supply to the monitoring module 50.

[0129] Of course, in some other embodiments, the monitoring module 50 is fixed to the second body 22b, and the second conductive member 72 can also be welded to the second pole 21b, so that the monitoring module 50 and the second pole 21b are electrically connected.

[0130] Correspondingly, the first conductive member 71 may also be welded to the first pole 21 a.

[0131] In another embodiment, the monitoring module 50 may also be disposed on the first body 22a.

[0132] In some examples, in combination with Figures 5, 8, 17 and 18, the first foil 71c is fixed to the side of the first main body 22a facing the inner cavity, and one end of the first foil 71c is welded to the first lead-out piece 211a, so that the first foil 71c is electrically connected to the first lead-out piece 211a, thereby realizing the electrical connection between the first conductive member 71 and the first lead-out piece 211a, and the other end of the first foil 71c is connected to the wire 71b, at least part of the wire 71b is pre-buried or preset inside the first side plate 60a and extends along the extension direction of the first side plate 60a, the second foil 71a is fixed to the side of the second main body 22b facing the inner cavity, one end of the second foil 71a is electrically connected to the monitoring module 50, and the other end is welded to the end of the wire 71b facing the second main body 22b, so that the first conductive member 71 is electrically connected to the monitoring module 50 and the first lead-out piece 211a, thereby realizing the electrical connection between the monitoring module 50 and the first lead-out piece 211a.

[0133] Of course, in some other embodiments, the first foil 71c may also be welded to the first pole 21a.

[0134] In other embodiments, the first conductive member 71 may include at least one of a first foil 71c, a wire 71b, and a second foil 71a. For example, the first conductive member 71 includes a wire 71b, one end of which is electrically connected to the monitoring module 50 and the other end of which is welded to the electrode tab 31, the electrode post 21, or the lead-out tab 211, thereby electrically connecting the monitoring module 50 to the electrode core 30.

[0135] In addition, the first foil 71c, the wire 71b and the second foil 71a may all be in a foil shape, a wire shape or other shapes that can form an electrical connection.

[0136] In one embodiment, as shown in Figures 8, 9 and 10, the first lead-out piece 211a is provided with a first groove 212a, and the first groove 212a at least partially accommodates the first foil 71c. Providing the first foil 71c in the first groove 212a can improve the reliability of the connection between the first foil 71c and the first lead-out piece 211a, and also facilitate the positioning of the first foil 71c and the first lead-out piece 211a during welding.

[0137] It should be noted that when the first foil 71 c is welded to the first pole 21 a , the first groove 212 a is provided on the first pole 21 a .

[0138] Optionally, in combination with Figures 11, 14 and 15, a second groove 212b is provided on the second lead-out piece 211b, and the second groove 212b at least partially accommodates the second conductive member 72. Providing the second conductive member 72 in the second groove 212b can improve the reliability of the connection between the second conductive member 72 and the second pole 21b, and also facilitate the positioning of the second conductive member 72 when welding with the second pole 21b.

[0139] It should be noted that, when the second conductive member 72 is electrically connected to the second pole 21 b , the second groove 212 b is provided on the second pole 21 b .

[0140] In some embodiments, the conductive member 70 can be welded simultaneously with the welding of the pole 21 to the main body 22. For example, while the first pole 21a is being welded to the first main body 22a, the first foil 71c can also be welded to the first lead tab 211a of the first pole 21a; and while the second pole 21b is being welded to the second main body 22b, the second conductive member 72 can also be welded to the second lead tab 211b of the second pole 21b. This operation can reduce the risk of damage to the monitoring module 50 and the conductive member 70 during handling and assembly.

[0141] In some embodiments, the cover assembly 20 is provided with a receiving groove on the side facing the inner cavity, which is used to receive and secure the monitoring module 50 and a portion of the conductive member 70. The receiving groove can improve the reliability of the connection between the monitoring module 50 and the conductive member 70 and the cover assembly 20, and can also facilitate the positioning of the monitoring module 50 and the conductive member 70 during installation, thereby enabling the monitoring module 50 and a portion of the conductive member 70 to be positioned on the cover assembly 20.

[0142] In some embodiments, as shown in FIG1 , the battery cell 100 further includes a spacer 40, a spacer 40 is fixed between the cover plate assembly 20 and the pole core 30, and the monitoring module 50 is fixed to the cover plate assembly 20 or the spacer 40. This means that when the spacer 40 is fixed between the cover plate assembly 20 and the pole core 30, the monitoring module 50 can be fixed to the cover plate assembly 20 or to the spacer 40, so as to achieve the support of the monitoring module 50 by the cover plate assembly 20 or the spacer 40, reduce the difficulty of fixing the monitoring module 50, and improve the positional stability of the monitoring module 50, improve the connection strength between the monitoring module 50 and the pole core 30, and make it have higher reliability, thereby ensuring the working performance of the monitoring module 50 to a certain extent, facilitating the use of the monitoring module 50 to monitor the performance indicators of the pole core 30, improving the accuracy of the monitoring results, and at the same time improving the safety of the battery cell 100.

[0143] At the same time, fixing the monitoring module 50 to the cover assembly 20 or the spacer 40 also allows the power supply line of the monitoring module 50 to be set along the cover assembly 20 or the spacer 40, reducing the impact of the environment on the monitoring module 50 and enabling the monitoring module 50 to have a better monitoring effect.

[0144] In addition, since the monitoring module 50 is integrated into the cover plate assembly 20 or the spacer 40 , the assembly steps of the pole core 30 are simplified and the assembly efficiency of the pole core 30 is improved.

[0145] It should be noted that if there is no installation position for the monitoring module 50, the monitoring module 50 is difficult to fix in the battery cell 100, and the connection strength between the monitoring module 50 and the battery cell 100 is low. As the battery cell 100 is used for a longer time, the monitoring module 50 is more likely to fail.

[0146] At the same time, due to the compact internal structure of the battery cell 100 and the small available space, it is difficult to install the monitoring module 50. The monitoring module 50 and its power supply line need to be installed with high precision to ensure that during the subsequent installation of the battery cell 100, other components inside the battery cell 100 will not interfere with the monitoring module 50 and its power supply line, thereby protecting the monitoring module 50 and its power supply line and reducing the impact of the environment on the monitoring module 50, so that the monitoring module 50 has a better monitoring effect.

[0147] Based on this, the present application fixes the monitoring module 50 of the battery cell 100 to the cover assembly 20 or the spacer 40. The monitoring module 50 is pre-integrated with the cover assembly 20 or the spacer 40. During the assembly process of the battery cell 100, the monitoring module 50 will be installed in the battery cell 100 along with the installation of the cover assembly 20 or the spacer 40, which simplifies the assembly steps of the battery cell 100 and reduces the difficulty of installing the monitoring module 50.

[0148] In some embodiments, the spacer 40 is arranged on the side of the pole core 30 facing the cover assembly 20, so that the spacer 40 is arranged between the cover assembly 20 and the pole core 30, thereby facilitating the fixing of the monitoring module 50 to the cover assembly 20 or the spacer 40, reducing the difficulty of fixing the monitoring module 50, and helping to improve the positional stability of the monitoring module 50, so as to ensure the working performance of the monitoring module 50 to a certain extent.

[0149] In some embodiments, the tab 31 passes through the spacer 40 and is fixedly connected to the cover plate assembly 20 , so as to achieve a fixed connection between the tab 31 and the cover plate assembly 20 .

[0150] In addition, since the tab 31 is fixedly connected to the cover assembly 20 through the spacer 40, setting the monitoring module 50 on the cover assembly 20 or the spacer 40 can make the distance between the monitoring module 50 and the tab 31 closer, thereby making it more convenient to set the power supply line of the monitoring module 50.

[0151] It should be noted that when the monitoring module 50 is arranged on the cover assembly 20, the power supply line between the monitoring module 50 and the pole 21 can be pre-embedded on the cover assembly 20 or pre-buried inside the cover assembly 20; when the monitoring module 50 is arranged on the spacer 40, the power supply line between the monitoring module 50 and the pole ear 31 can also be pre-embedded on the spacer 40 or pre-buried inside the spacer 40. The above settings can reduce the installation difficulty of the power supply line of the monitoring module 50 and make the power supply line of the monitoring module 50 have higher reliability.

[0152] In some examples, as shown in Figure 1, when the battery cell 100 includes two cover plate assemblies 20 and two pole tabs 31, the battery cell 100 also includes two spacers 40, and the two spacers 40 are arranged on both sides of the pole core 30. The pole tab 31 passes through the spacer 40 and is electrically connected to the pole 21 on the main body 22. The pole core 30 is conductive to the pole 21 through the pole tab 31, so that the battery cell 100 can supply power to the electrical device 10000 through the pole 21.

[0153] In some examples, as shown in Figures 19 to 24, the two spacers 40 are respectively a first spacer 40a and a second spacer 40b, the first spacer 40a is arranged between the first cover plate assembly 20a and the pole core 30, and the second spacer 40b is arranged between the second cover plate assembly 20b and the pole core 30, and the pole ear 31 is divided into a first pole ear 31a and a second pole ear 31b, and the first pole ear 31a and the second pole ear 31b pass through the first spacer 40a and the second spacer 40b respectively and are electrically connected to the first pole 21a and the second pole 21b respectively.

[0154] In one embodiment, the tab 31 passes through the spacer 40 and is fixed to one end of the pole post 21 facing the pole core 30 , so that the pole post 21 is electrically connected to the pole core 30 through the tab 31 .

[0155] In some embodiments, as shown in Figures 19-24, the monitoring module 50 is fixed to the spacer 40, the spacer 40 includes a hollow area, and the battery cell 100 includes a conductive member 70. One end of the conductive member 70 is electrically connected to the monitoring module 50, and the other end of the conductive member 70 passes through the hollow area to be electrically connected to the pole core 30. This means that when the monitoring module 50 is fixed to the spacer 40, the spacer 40 includes a hollow area, so that the conductive member 70 can be electrically connected to the monitoring module 50 and the pole core 30 respectively, thereby achieving electrical conduction between the monitoring module 50 and the pole core 30.

[0156] In some embodiments, as shown in Figures 21, 22, 23, and 24, the monitoring module 50 is fixed to the second spacer 40b, the first conductive member 71 is welded to the first pole 21a, and the second conductive member 72 is welded to the second pole tab 31b. The monitoring module 50 is electrically connected to the first pole 21a via the first conductive member 71 and to the second pole tab 31b via the second conductive member 72.

[0157] Of course, in another embodiment, the monitoring module 50 may also be fixed on the first spacer 40a.

[0158] In some examples, one end of the second conductive member 72 is electrically connected to the monitoring module 50 , and the other end passes through the hollow area of ​​the second spacer 40 b and is welded to the second tab 31 b , so that the monitoring module 50 is electrically connected to the second tab 31 b .

[0159] It should be noted that when the first spacer 40a and the second spacer 40b are included, as shown in Figures 22 and 23, the second foil 71a is fixed to the second spacer 40b. One end of the second foil 71a is welded to the wire 71b, and the other end is electrically connected to the monitoring module 50. The wire 71b is electrically connected to the first lead-out piece 211a through the first foil 71c of the first cover assembly 20a, thereby electrically connecting the monitoring module 50 to the first pole 21a, thereby achieving electrical continuity between the monitoring module 50 and the pole core 30.

[0160] The specific development of each of the above embodiments can make the monitoring module 50 and the pole core 30 conductive, and the battery cell 100 can also provide power to the monitoring module 50 when working, ensuring the normal operation of the monitoring module 50.

[0161] Optionally, at least a portion of the conductive member 70 is embedded in the spacer 40 and welded to the tab 31 , thereby achieving welding with the tab 31 so that the monitoring module 50 and the pole core 30 can be electrically connected.

[0162] In some examples, at least a portion of the conductive member 70 is embedded in the spacer 40 , one end of the conductive member 70 is electrically connected to the monitoring module 50 , and the other end is welded to the tab 31 , thereby enabling conduction between the monitoring module 50 and the pole core 30 .

[0163] In summary, the monitoring module 50 in the battery cell 100 of the present application can be arranged in two ways. In one way, the monitoring module 50 is fixed to the cover assembly 20; in the other way, the monitoring module 50 is fixed to the spacer 40. Both ways can integrate the monitoring module 50 into the battery cell 100, thereby achieving the effect of the monitoring module 50 monitoring the battery cell 100.

[0164] In one embodiment, there are multiple monitoring modules 50, and multiple monitoring modules 50 can be set on the cover assembly 20 or the spacer 40 at the same time, or a certain number of monitoring modules 50 can be set on the cover assembly 20, and a certain number of monitoring modules 50 can be set on the spacer 40.

[0165] In some embodiments, as shown in Figures 22 and 23 , the spacer 40 is provided with a buckle 80, and the monitoring module 50 is snapped onto the spacer 40 via the buckle 80. While achieving the goal of securing the monitoring module 50 to the spacer 40, the difficulty of securing the monitoring module 50 to the spacer 40 is also reduced, thereby facilitating the use of the spacer 40 to support the monitoring module 50, improving the positional stability of the monitoring module 50, and ensuring the working performance of the monitoring module 50 to a certain extent.

[0166] In addition, the snap connection of the buckle 80 can also realize a detachable connection between the monitoring module 50 and the spacer 40, which facilitates the disassembly of the monitoring module 50 and reduces the difficulty of maintenance of the monitoring module 50.

[0167] In one embodiment, in combination with Figures 22 and 23, the second spacer 40b is provided with a female buckle 81 of the buckle 80, and the monitoring module 50 is provided with a sub-buckle 82 of the buckle 80. The female buckle 81 and the sub-buckle 82 cooperate with each other, thereby realizing the mutual cooperation between the monitoring module 50 and the second spacer 40b, so that the monitoring module 50 is fixed on the second spacer 40b.

[0168] In another embodiment, the female buckle 81 of the buckle 80 can be disposed on the monitoring module 50, and the male buckle 82 of the buckle 80 can be disposed on the second spacer 40b.

[0169] In one embodiment, the monitoring module 50 includes a packaging body, the monitoring module 50 is encapsulated in the packaging body, the packaging body at least partially wraps the monitoring module 50, the packaging body is provided with a female buckle 81 or a sub-buckle 82, and the monitoring module 50 is fixedly connected to the spacer 40 through the female buckle 81 or the sub-buckle 82 of the packaging body.

[0170] In one embodiment, as shown in Figure 1, the cover plate assembly 20 includes a cover plate spacer 23, which is located on the side of the main body 22 facing the inner cavity. The cover plate spacer 23 can separate the main body 22 from the pole core 30 in the inner cavity, preventing the pole core 30 from directly contacting the main body 22 of the cover plate assembly 20.

[0171] In one embodiment, as shown in Figures 1, 6 and 7, a first cover spacer 23a is provided on the side of the first main body 22a facing the inner cavity. The first cover spacer 23a includes a first card groove 26a facing the inner cavity. The first card groove 26a can fix and accommodate part of the wire 71b to prevent the wire 71b from moving in the inner cavity and prevent the wire 71b from contacting other components in the battery cell 100 and causing the wire 71b to break.

[0172] In another embodiment, as shown in Figures 1, 11 and 12, the second main body 22b is provided with a second cover spacer 23b on the side facing the inner cavity. The second cover spacer 23b includes a second card groove 26b facing the side facing the inner cavity. The second card groove 26b can also fix and accommodate part of the wire 71b, and can also prevent the wire 71b from moving in the inner cavity or contacting other components in the battery cell 100 and causing breakage.

[0173] In some embodiments, the monitoring module 50 includes one or more of a chip, a processor, and an integrated circuit, so that the monitoring module 50 can monitor and store the performance parameters of the battery cell 100 and send the stored parameters to other receiving terminals, thereby achieving the purpose of monitoring the performance indicators of the battery cell 100 and improving the accuracy of monitoring.

[0174] In some embodiments, the monitoring module 50 is provided with an inductive conductive tape, which is inserted into the pole core 30 and electrically connected to the pole core 30 to monitor the performance data of the battery cell 100. This achieves the purpose of monitoring the performance indicators of the battery cell 100, while improving the accuracy of the monitoring results and the safety of the battery cell 100.

[0175] It should be noted that in this article, the electrical connection between the two components can be achieved by welding, such as: the first lead-out piece 211a and the first foil 71c, the first foil 71c and the wire 71b, the wire 71b and the second foil 71a, and the second conductive member 72 and the second lead-out piece 211b can all be welded to fix the two components.

[0176] It should be noted that the welding between the components of the existing battery cell 100 is usually done by soldering. Since there is electrolyte in the inner cavity, corrosion-resistant glue needs to be set on the outside of the soldering joint to protect the soldering joint, and the curing of the corrosion-resistant glue takes a long time, which will increase the assembly steps of the battery cell 100 and extend its assembly time.

[0177] Based on this, in this embodiment, the welding of the internal components of the battery cell 100 can be performed by laser welding or ultrasonic welding. The use of ultrasonic welding can shorten the assembly time of the battery cell 100.

[0178] The battery pack 1000 according to an embodiment of the present application will be described below with reference to the accompanying drawings.

[0179] As shown in FIG. 25 , a battery pack 1000 according to an embodiment of the present application includes: a plurality of battery cells 100 and a tray.

[0180] The battery cell 100 is the aforementioned battery cell 100 , and the specific structure of the battery cell 100 is not described in detail here.

[0181] As can be seen from the above structure, the battery pack 1000 of the embodiment of the present application can improve the safety of the battery pack 1000 by adopting the battery cell 100 of the above embodiment.

[0182] In some embodiments, multiple battery cells 100 are arranged on a tray to utilize the tray to support the battery cells 100, improve the position stability of the battery cells 100, and make the overall structure of the battery pack 1000 stable, thereby ensuring the working performance of the battery pack 1000 to a certain extent.

[0183] It should also be noted that, in the battery pack 1000 , the multiple battery cells 100 may be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 100 are connected in both series and in parallel.

[0184] The following describes the electrical device 10000 according to an embodiment of the present application with reference to the accompanying drawings.

[0185] As shown in FIG. 25 , an electric device 10000 according to an embodiment of the present application includes: a battery cell 100 or a battery pack 1000 , and the battery cell 100 or the battery pack 1000 is electrically connected to the electric device 10000 to supply power to the electric device 10000 .

[0186] The battery cell 100 is the aforementioned battery cell 100 , and the battery pack 1000 is the aforementioned battery pack 1000 . The specific structures of the battery cell 100 and the battery pack 1000 are not described in detail here.

[0187] As can be seen from the above structure, the electric device 10000 of the embodiment of the present application, by adopting the aforementioned battery cell 100 or battery pack 1000, can ensure the working performance of the electric device 10000 while also improving the safety of the electric device 10000.

[0188] The electrical device 10000 mentioned here may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc.

[0189] It should be noted that the battery cell 100 of the present application can be used in the aforementioned electrical device 10000 or battery pack 1000 as a power supply component. However, the battery cell 100 is not limited to use in the electrical device 10000 or battery pack 1000. The battery cell 100 of the present application is also applicable to other electrical systems requiring power supply and has higher reliability.

[0190] Other structures of the battery cell 100 , the battery pack 1000 and the electrical device 10000 according to the embodiment of the present application are well known to those skilled in the art and will not be described in detail here.

[0191] Throughout this specification, references to terms such as "embodiment" and "example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0192] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery cell, wherein: include: Housing (10); a cover plate assembly (20), the cover plate assembly (20) being disposed on the housing (10) and cooperating with the housing (10) to form an inner cavity; A pole core (30) and a monitoring module (50), wherein the pole core (30) and the monitoring module (50) are both arranged in the inner cavity, and the monitoring module (50) is electrically connected to the pole core (30).

2. The battery cell according to claim 1, wherein: The cover plate assembly (20) is provided with a pole (21), the pole core (30) has a pole ear (31), the pole ear (31) is electrically connected to the pole (21), and the monitoring module (50) is electrically connected to the pole ear (31) or the pole (21).

3. The battery cell according to claim 1 or 2, wherein: It also includes a lead-out piece (211), a pole (21) is provided on the cover plate assembly (20), the pole core (30) has a pole ear (31), and the pole ear (31) is electrically connected to the pole (21) through the lead-out piece (211).

4. The battery cell according to claim 3, wherein: The lead-out tabs (211) include two, the tabs (31) include a positive tab and a negative tab, the pole column (21) includes a positive pole column and a negative pole column, the positive tab is electrically connected to the positive pole column via one of the lead-out tabs (211), and the negative tab is electrically connected to the negative pole column via the other lead-out tab (211).

5. The battery cell according to claim 3 or 4, wherein: The monitoring module (50) is electrically connected to the lead-out piece (211).

6. The battery cell according to claim 1 or 2, wherein: It also includes a conductive member (70), one end of which is electrically connected to the monitoring module (50), and the other end of which is electrically connected to the pole core (30).

7. The battery cell according to claim 6, wherein: The conductive member (70) includes a first conductive member (71) and a second conductive member (72); the pole core (30) has a positive pole tab and a negative pole tab, the positive pole tab and the negative pole tab are respectively arranged on opposite sides of the pole core (30) in a first direction; the monitoring module (50) is arranged on one side of the pole core (30) in the first direction; the second conductive member (72) conducts electricity between the monitoring module (50) and the positive pole tab or the negative pole tab located on one side of the pole core (30); and the first conductive member (71) conducts electricity between the monitoring module (50) and the positive pole tab or the negative pole tab located on the other side of the pole core (30).

8. The battery cell according to claim 7, wherein: It also includes a first side plate (60a) and a second side plate (60b), wherein the first side plate (60a) and the second side plate (60b) are respectively arranged on opposite sides of the pole core (30) in a second direction, and the second direction intersects with the first direction; The first conductive member (71) is at least partially embedded or preset inside the first side plate (60a) and / or the second side plate (60b).

9. The battery cell according to claim 8, wherein: The cover plate assembly (20) includes two, and the two cover plate assemblies (20) are respectively provided corresponding to the positive electrode tab and the negative electrode tab, the cover plate assembly (20) corresponding to the positive electrode tab is provided with a positive electrode column electrically connected to the positive electrode tab, and the cover plate assembly (20) corresponding to the negative electrode tab is provided with a negative electrode column electrically connected to the negative electrode tab; The first side plate (60a) and the second side plate (60b) are connected between the two cover plate assemblies (20).

10. The battery cell according to any one of claims 1 to 6, wherein: The pole core (30) has a positive pole tab and a negative pole tab, and the positive pole tab and the negative pole tab are arranged on the same side of the pole core (30) in the first direction. The cover plate assembly (20) includes one, and the cover plate assembly (20) is arranged opposite to the positive pole tab and the negative pole tab. A positive pole column and a negative pole column are provided on the cover plate assembly (20), and the positive pole tab is electrically connected to the positive pole column, and the negative pole tab is electrically connected to the negative pole column.

11. The battery cell according to any one of claims 6 to 9, wherein: The monitoring module (50) is fixed to the side of the cover assembly (20) facing the inner cavity, and the conductive member (70) is fixed to the cover assembly (20) and electrically connected to the monitoring module (50).

12. The battery cell according to claim 11, wherein: The cover plate assembly (20) is provided with a receiving groove on one side facing the inner cavity, and the receiving groove is used to receive and fix the monitoring module (50) and part of the conductive member (70).

13. The battery cell according to any one of claims 1 to 12, wherein: It also includes a spacer (40), the spacer (40) being fixed between the cover plate assembly (20) and the pole core (30), and the monitoring module (50) being fixed to the cover plate assembly (20) or the spacer (40).

14. The battery cell according to claim 13, wherein: The monitoring module (50) is fixed to the spacer (40), the spacer (40) includes a hollow area, the battery core includes a conductive member (70), one end of the conductive member (70) is electrically connected to the monitoring module (50), and the other end of the conductive member (70) passes through the hollow area and is electrically connected to the pole core (30); And / or, at least a portion of the conductive member (70) is embedded in the spacer (40).

15. The battery cell according to claim 14, wherein: The spacer (40) is provided with a buckle (80), and the monitoring module (50) is buckled onto the spacer (40) via the buckle (80).

16. The battery cell according to any one of claims 6 to 9, wherein: The conductive member (70) includes a laser welding portion, and the monitoring module (50) is electrically connected to the pole core (30) via the laser welding portion.

17. The battery cell according to any one of claims 1 to 16, wherein: The monitoring module (50) includes one or more of a chip, a processor and an integrated circuit.

18. The battery cell according to any one of claims 1 to 17, wherein: The monitoring module (50) is provided with an inductive conductive tape, which is inserted into the pole core (30) and electrically connected to the pole core (30) to monitor performance data of the battery core.

19. A battery pack, wherein: include: A plurality of battery cells, wherein the battery cells are the battery cells according to any one of claims 1 to 18; A tray, wherein the plurality of battery cells are arranged in the tray.

20. An electrical device, wherein: The battery cell comprises the battery cell according to any one of claims 1 to 18 or the battery pack according to claim 19, wherein the battery cell or the battery pack is electrically connected to the electrical device to supply power to the electrical device.

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