Battery cell, battery pack and electric device

Abstract

An electric device (2000), comprising a battery pack (1000). The battery pack (1000) comprises a battery cell (100). The battery cell (100) comprises a cover plate assembly (20), a casing (10), an electrode core (30), a spacer ring (40), and a monitoring module (50), wherein the electrode core (30) is fixed in an inner cavity enclosed by the cover plate assembly (20) and the casing (10); the spacer ring (40) is fixed to the side of the electrode core (30) facing the cover plate assembly (20); the electrode core (30) is provided with a tab (31), the tab (31) passing through the spacer ring (40) and being fixed to the cover plate assembly (20); and the monitoring module (50) is fixed to the cover plate assembly (20) or the spacer ring (40), and the monitoring module (50) is electrically connected to the tab (31) so as to supply power to the monitoring module (50).

Description

Battery cells, battery packs and electrical devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on February 29, 2024, with application number 202420413395.7 and title “Battery Cell, Battery Pack and Electrical Device,” the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of battery cells, and in particular to a battery cell, a battery pack and an electrical device. Background Art

[0004] During the operation of the battery cell, the temperature change and gas production inside the battery cell will affect the safety of the battery cell. In the prior art, a monitoring module is usually set in the battery cell to monitor the working status of the battery cell.

[0005] The monitoring module is installed inside the battery cell housing, but there is no designated mounting location inside the housing, making it difficult to securely secure the monitoring module. Furthermore, the housing's compact components and limited available space make routing the monitoring module's power supply circuit difficult, and the circuit's operating state is easily affected by the environment, leading to poor monitoring.

[0006] Public content

[0007] In view of the above-mentioned technical problems, the purpose of this application is to provide a battery cell with an integrated monitoring module, a battery pack including the above-mentioned battery cell, and a vehicle including the above-mentioned battery cell or the above-mentioned battery pack. The specific technical solutions include the following:

[0008] In the first aspect, an embodiment of the present application provides a battery cell, comprising a cover assembly, a shell, a pole core, a spacer and a monitoring module, wherein the pole core is fixed in an inner cavity formed by the cover assembly and the shell, the spacer is fixed on the side of the pole core facing the cover assembly, the pole ear passes through the spacer and is fixed to the cover assembly, the monitoring module is fixed to the cover or the spacer, and the monitoring module is electrically connected to the pole ear for power supply to the monitoring module.

[0009] The detection module in the battery cell of the present application is electrically connected to the pole ear of the pole core to form a loop, so that the pole core supplies power to the monitoring module. The monitoring module is located in the inner cavity of the battery cell and is fixed on the cover assembly or the spacer to enable the monitoring module to monitor the battery cell performance data.

[0010] The monitoring module of the battery cell of the present application is integrated into the cover plate assembly or the spacer, which improves the connection strength between the monitoring module and the battery cell and makes it more reliable. In addition, the power supply line of the monitoring module can be set along the cover plate assembly or the spacer, reducing the impact of the environment on the monitoring module and making the monitoring module have a better monitoring effect. At the same time, since the monitoring module is integrated into the cover plate assembly or the spacer, the assembly steps of the battery cell are simplified and the assembly efficiency of the battery cell is improved.

[0011] In one embodiment, the cover plate assembly includes a main body and a pole, the pole is embedded in the main body, and the tab passes through the spacer and is electrically connected to the pole.

[0012] In this embodiment, the pole of the cover plate assembly is electrically connected to the pole tab of the pole core, so that the electrical equipment can be electrically connected to the pole core through the pole, thereby supplying power to the electrical equipment.

[0013] In one embodiment, the battery cell 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 welded to the tab, so that the monitoring module is electrically connected to the tab.

[0014] In one embodiment, the other end of the conductive member is welded to the pole, and the monitoring module is electrically connected to the tab via the pole.

[0015] In the above two embodiments, the conductive member is electrically connected between the monitoring module and the tab or pole, thereby electrically connecting the monitoring module to the pole core and ensuring normal operation of the monitoring module. Furthermore, one end of the conductive member is welded to the tab or pole, providing greater reliability.

[0016] In one embodiment, the monitoring module is fixed to the side of the main body facing the inner cavity, and the conductive member is fixed to the main body and welded to the pole.

[0017] In this embodiment, the monitoring module is fixed to the side of the cover assembly's main body facing the inner cavity, and the conductive member is electrically connected between the pole and the monitoring module, so that the pole core and the monitoring module are conductive and power is supplied to the monitoring module, thereby realizing normal operation of the monitoring module.

[0018] In one embodiment, a receiving groove is provided on the side of the main body facing the inner cavity, and the receiving groove is used to receive and fix the monitoring module and part of the conductive member.

[0019] In this embodiment, the main body of the cover assembly is provided with a receiving groove, into which the monitoring module and some conductive components are fixed. This improves the reliability of the connection between the monitoring module and the conductive components and the main body of the cover assembly. Furthermore, the provision of the receiving groove also facilitates the positioning of the monitoring module and the conductive components during installation.

[0020] In one embodiment, the monitoring module is fixed to the spacer, the spacer includes a hollow area, and the conductive member passes through the hollow area and is welded to the tab.

[0021] In one embodiment, the conductive member is at least partially embedded in the spacer and welded to the tab.

[0022] In the above two embodiments, the monitoring module is fixed to the spacer, the conductive part passes through the hollow area of ​​the spacer or is embedded in the spacer, and is electrically connected between the pole ear and the monitoring module, so that the pole core and the monitoring module are conductive and power is supplied to the monitoring module, thereby realizing the normal operation of the monitoring module.

[0023] In one embodiment, the spacer is provided with a buckle, and the monitoring module is snapped onto the spacer.

[0024] In this embodiment, the spacer and the monitoring module are matched through a snap-fit ​​structure, so that the monitoring module is fixed on the spacer.

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

[0026] In this embodiment, the monitoring module is composed of one or more of a chip, a processor and an integrated circuit, so that the monitoring module can monitor and store the performance parameters of the battery cell and send the stored parameters to other receiving terminals.

[0027] In one embodiment, there are two main bodies, which are arranged on both sides of the pole core. Each main body is provided with a pole post, and a spacer is fixed between each main body and the pole core.

[0028] In this embodiment, the battery cell includes a main body of two cover plate assemblies, and poles are provided on the two main bodies and located on both sides of the pole core. The pole ears of the pole core pass through different spacers and are electrically connected to different poles, so that the battery cell can supply power to other devices through the poles.

[0029] In one embodiment, the monitoring module is fixed to one side of the pole core, and the battery core includes a first side plate and a second side plate. The first side plate and the second side plate are both connected between two spacers and are respectively located on opposite sides of the spacers. The conductive member connects the monitoring module and the pole located on the other side of the pole core, and the conductive member is at least partially embedded or preset inside the first side plate.

[0030] In one embodiment, the conductive element is partially embedded or preset inside the first side plate and the second side plate.

[0031] In the above two embodiments, a first side plate and a second side plate are arranged between the spacer rings, the conductive member is at least partially embedded or preset in the first side plate, or the conductive member is at least partially embedded or preset inside the first side plate and the second side plate, and the monitoring module is located on one side of the pole core.

[0032] One end of the conductive member is electrically connected to the monitoring module, and the other end extends through the first side plate in a direction away from the monitoring module and is welded to the pole on the other side of the pole core, or the other end of the conductive member is welded to the pole on the other side of the pole core through the first side plate and the second side plate, so that the conductive member is conductive to the pole core to achieve normal operation of the monitoring module.

[0033] In one embodiment, the pole includes a lead-out piece, the lead-out piece is used to be electrically connected to the tab, and the conductive member is welded to the lead-out piece to be electrically connected to the tab.

[0034] In this embodiment, a lead-out plate is provided at one end of the pole facing the inner cavity, the pole is electrically connected to the pole tab through the lead-out plate, and one end of the conductive part is welded to the lead-out plate, so that the monitoring module is conductive with the pole tab, and the pole core supplies power to the monitoring module to achieve normal operation of the monitoring module.

[0035] In one embodiment, the conductive member includes a laser welding portion, the laser welding portion is fixedly connected to the pole or the pole ear, and the monitoring module is electrically connected to the pole core via the laser welding portion.

[0036] In this embodiment, the conductive member is laser-welded to the pole post or tab to form a laser weld, thereby securely connecting the conductive member to the tab or pole post via the laser weld. Furthermore, the monitoring module can also be electrically connected to the tab or pole post via the laser weld of the conductive member, allowing the pole core to supply power to the monitoring module, thereby ensuring normal operation of the monitoring module.

[0037] In one embodiment, the monitoring module is provided with an inductive conductive tape, which is inserted into the interior of the pole core and electrically connected to the pole core to monitor the performance data of the battery core.

[0038] In a second aspect, an embodiment of the present application further provides a battery pack, which includes the above-mentioned battery cells and a tray, wherein a plurality of battery cells are arranged in the tray.

[0039] In a third aspect, an embodiment of the present application further provides an electrical device, which includes the above-mentioned battery cell or the above-mentioned battery pack, and the battery cell or the battery pack is electrically connected to the electrical device to supply power to the electrical device.

[0040] The battery pack and electrical device of the present application have improved reliability and higher assembly efficiency due to the use of the above-mentioned battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] FIG1 is a schematic diagram of the exploded structure of a battery cell provided in one embodiment of the present application;

[0042] FIG2 is a schematic diagram of a battery cell structure from one perspective provided in an embodiment of the present application;

[0043] FIG3 is a schematic diagram of a battery cell structure from another perspective provided in one embodiment of the present application;

[0044] FIG4 is a schematic diagram of a battery cell structure before installation provided in one embodiment of the present application;

[0045] FIG5 is a partial enlarged view of a battery cell structure before installation provided in one embodiment of the present application;

[0046] FIG6 is a schematic diagram of a structure of a battery cell from one perspective provided in an embodiment of the present application;

[0047] FIG7 is a schematic diagram of the structure of a battery cell from another perspective provided in one embodiment of the present application;

[0048] FIG8 is a schematic diagram of the structure of a battery cell provided in one embodiment of the present application;

[0049] FIG9 is a schematic diagram of a structure of a battery cell from one perspective provided in an embodiment of the present application;

[0050] FIG10 is a schematic diagram of a partial structure of a battery cell from another perspective provided in one embodiment of the present application;

[0051] FIG11 is a schematic diagram of the structure of a battery cell provided in one embodiment of the present application;

[0052] FIG12 is a schematic diagram of the structure of a battery cell before installation provided in one embodiment of the present application;

[0053] FIG13 is a partial enlarged view of a battery cell structure before installation provided in one embodiment of the present application;

[0054] FIG14 is a partial enlarged view of a battery cell structure before installation provided in one embodiment of the present application;

[0055] FIG15 is a partial cross-sectional schematic diagram of a battery cell provided in one embodiment of the present application;

[0056] FIG16 is a partial cross-sectional schematic diagram of a battery cell provided in one embodiment of the present application;

[0057] FIG17 is a schematic diagram of the structure of a battery cell before installation provided in another embodiment of the present application;

[0058] FIG18 is a schematic diagram of the structure of a battery cell provided in another embodiment of the present application;

[0059] FIG19 is a schematic diagram of the structure of a battery cell before installation provided in another embodiment of the present application;

[0060] FIG20 is a partial enlarged view of a battery cell structure before installation provided in another embodiment of the present application;

[0061] FIG21 is a schematic diagram of the structure of a battery cell provided in another embodiment of the present application;

[0062] FIG22 is a schematic block diagram of a battery pack according to an embodiment of the present application;

[0063] FIG23 is a schematic block diagram of an electric device according to an embodiment of the present application;

[0064] FIG24 is a schematic block diagram of an electric device according to another embodiment of the present application;

[0065] FIG25 is a schematic block diagram of a detection module according to an embodiment of the present application.

[0066] The figures are marked as follows: 100-battery cell; 10-housing; 20-cover assembly; 20a-first cover assembly; 20b-second cover assembly; 21-pole; 21a-first pole; 21b-second pole; 211-lead-out piece; 211a-first lead-out piece; 211b-second lead-out piece; 212a-first groove; 212b-second groove; 22-main body; 22a-first main body; 22b-second main 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 Slot; 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; 60-side plate; 60a-first side plate; 60b-second side plate; 70-conductive member; 71-first conductive member; 71a-second foil; 71b-conductive wire; 71c-first foil; 72-second conductive member; 1000-battery pack; 2000-electrical device; 200-tray; 500-chip; 501-processor; 502-integrated circuit; 80-receiving slot; 90-hollow area. DETAILED DESCRIPTION

[0067] 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 may 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.

[0068] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be used to implement. The serial numbers of 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 the present application include direct and indirect connections (couplings) unless otherwise specified. The directional terms mentioned in the present 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.

[0069] 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.

[0070] The present application relates to an electrical device, which includes electrically connected battery cells or battery packs, wherein the battery packs include battery cells and a tray, wherein a plurality of battery cells are arranged in the tray. The battery cells or battery packs are used to power the electrical device.

[0071] Please refer to Figures 1, 2 and 3, wherein Figure 1 shows a schematic diagram of the decomposed structure of the battery cell 100 provided in an embodiment of the present application, Figure 2 shows a schematic diagram of the structure of the battery cell 100 provided in an embodiment of the present application from one perspective, and Figure 3 shows a schematic diagram of the structure of the battery cell 100 provided in another perspective in an embodiment of the present application.

[0072] The battery cell 100 of the present application includes a shell 10, a cover assembly 20, a pole core 30, a spacer 40 and a monitoring module 50. 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 for accommodating the pole core 30. The pole core 30 is fixed in the inner cavity. The pole core 30 includes a pole ear 31, which extends toward the cover assembly 20. A spacer 40 is provided on the side of the pole core 30 facing the cover assembly 20. The pole ear 31 passes through the spacer 40 and is fixedly connected to the cover assembly 20. The battery cell 100 can be electrically connected to the electrical equipment through the pole ear 31 and form a loop to meet the power demand of the electrical equipment.

[0073] Specifically, in one embodiment, as shown in FIG1 , a battery cell 100 includes two cover plate assemblies 20, two tabs 31, and two spacers 40. A pole 21 is provided on each of the main bodies 22 of the two cover plate assemblies 20, and the cover plate assemblies 20, the tabs 31, and the spacers 40 are arranged on either side of the pole core 30. Different tabs 31 extend toward different poles 21. The tabs 31 pass through the spacers 40 to electrically connect to the poles 21 on the main body 22. The pole core 30 is electrically connected to the poles 21 through the tabs 31, allowing the battery cell 100 to power electrical devices through the poles 21.

[0074] The battery cell 100 of the present application is also provided with a monitoring module 50, which is fixed to the cover assembly 20 or the spacer 40. The monitoring module 50 is electrically connected to the pole ear 31 respectively, so that a loop is formed between the monitoring module 50 and the pole core 30 to realize power supply of the monitoring module 50.

[0075] Specifically, in one embodiment, as shown in FIG1 , the monitoring module 50 is fixed to the cover assembly 20. The cover assembly 20 is provided with a pole 21. The end of the pole 21 facing the inner cavity is provided with a lead-out tab 211. The lead-out tab 211 is electrically connected between the pole 21 and the tab 31. At the same time, the battery cell 100 is also provided with a conductive member 70. One end of the conductive member 70 extends toward the lead-out tab 211 and is electrically connected to the lead-out tab 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 electrically connected to each other, thereby realizing power supply to the monitoring module 50.

[0076] The battery cell 100 of the present application is internally provided with a monitoring module 50 for monitoring the performance indicators of the battery cell 100. The monitoring module 50 forms a circuit with the electrode core 30 via the electrode tab 31, and the battery cell 100 supplies power to the monitoring module 50 through the electrode tab 31. The monitoring module 50 can collect and store performance indicators such as gas production, temperature, and pressure within the battery cell 100. It can also wirelessly transmit the collected performance data of the battery cell 100 to other terminals, which can then analyze and process the performance data of the battery cell 100.

[0077] In the prior art, there is no installation location for the monitoring module 50 in the battery cell 100. 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. At the same time, due to the compact internal structure of the battery cell 100 and the small available space, it is more difficult to install the monitoring module 50. The monitoring module 50 and its power supply circuit require high-precision installation 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 circuit, thereby protecting the monitoring module 50 and its power supply circuit and reducing the impact of the environment on the monitoring module 50, so that the monitoring module 50 has a better monitoring effect.

[0078] The monitoring module 50 of the battery cell 100 of the present application is fixed to the cover plate assembly 20 or the spacer 40. The monitoring module 50 is pre-integrated with the cover plate 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 plate 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.

[0079] In addition, since the pole tab 31 is fixedly connected to the cover assembly 20 through the spacer 40, the monitoring module 50 is arranged on the cover assembly 20 or the spacer 40, and the distance between the monitoring module 50 and the pole tab 31 is closer, and it is more convenient to set the power supply line of the monitoring module 50. For example, 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 in the interior of 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 tab 31 can also be pre-embedded on the spacer 40 or pre-buried in the interior of the spacer 40. The above settings can reduce the difficulty of installing the power supply line of the monitoring module 50 and make the power supply line of the monitoring module 50 more reliable.

[0080] It should be noted that the battery cell 100 of the present application can be used in the aforementioned electrical devices or battery packs as a power supply component. However, the battery cell 100 is not limited to use in electrical devices or battery packs. The battery cell 100 of the present application is also applicable to other electrical systems that require power supply and has higher reliability.

[0081] In one embodiment, as shown in FIG. 1 , the cover assembly 20 includes a pole 21 and a body 22 . The pole 21 is embedded in the body 22 , and the tab 31 passes through the spacer 40 and is electrically connected to the pole 21 .

[0082] 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 .

[0083] In another embodiment, as shown in FIG1 , the pole 21 includes a lead tab 211 located at the end of the pole 21 facing the pole core 30. The tab 31 is fixedly connected to the lead tab 211 on the pole 21. Compared to a cylindrical pole 21, the lead tab 211 has a larger contact surface area. The tab 31 is fixed to the lead tab 211, making the connection between the tab 31 and the pole 21 more reliable. Furthermore, the larger contact area reduces the resistance between the tab 31 and the pole 21, thereby reducing energy loss during the transmission of electricity through the pole 21 to the power-consuming device.

[0084] In one embodiment, as shown in Figure 1, 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 is welded to the pole 21, so that the monitoring module 50 is electrically connected to the pole ear 31, thereby realizing power supply to the monitoring module 50.

[0085] In one embodiment, as shown in FIG1 , the pole 21 includes a lead-out tab 211, which electrically connects the pole 21 to the tab 31 via the lead-out tab 211. The conductive member 70 is fixed to the cover assembly 20 and welded to the lead-out tab 211. The conductive member 70 is electrically connected to the tab 31 via the lead-out tab 211. The lead-out tab 211 can increase the contact area between the pole 21 and the conductive member 70, thereby improving the electrical conductivity and connection strength between the pole 21 and the conductive member 70.

[0086] In one embodiment, the battery cell 100 includes a conductive member 70 , one end of which is electrically connected to the monitoring module 50 , and the other end is welded to the tab 31 , so that the monitoring module 50 is electrically connected to the tab 31 , thereby realizing power supply to the monitoring module 50 .

[0087] In one embodiment, the conductive member 70 includes a first conductive member 71 and a second conductive member 72. One end of the first conductive member 71 and the second conductive member 72 are connected to the monitoring module 50, the other end of the first conductive member 71 is connected to the electrode tab 31, and the other end of the second conductive member 72 is connected to the electrode post 21. In one embodiment, as shown in Figures 2 and 3, the battery cell 100 includes two cover plate assemblies 20, namely a first cover plate assembly 20a and a second cover plate assembly 20b. The first body 22a of the first cover plate assembly 20a and the second body 22b of the second cover plate assembly 20b are respectively provided with a first electrode post 21a and a second electrode post 21b.

[0088] In one embodiment, as shown in FIG2 , the first body 22 a is provided with a liquid injection port 24 , which communicates with the inner cavity and is used to inject electrolyte into the inner cavity. In another embodiment, the liquid injection port 24 can also be provided on the second body 22 b or the housing 10 , and the specific position of the liquid injection port 24 can be set according to the position of the battery cell 100 during injection.

[0089] In one embodiment, as shown in Figure 3, the second body 22b is provided with an explosion-proof valve 25, which connects the inner cavity to the outside world. Opening the explosion-proof valve 25 allows gas in the inner cavity to be discharged. During the operation of the battery cell 100, gas is generated. Excessive gas can cause excessive pressure in the inner cavity, thereby affecting the safety of the battery cell 100. In another embodiment, the explosion-proof valve 25 can also be provided on the first body 22a or the housing 10. The specific location of the explosion-proof valve 25 can be set based on the position of the battery cell 100 during liquid injection.

[0090] There are two ways to configure the monitoring module 50 in the battery cell 100. In one embodiment, the monitoring module 50 is fixed to the cover assembly 20; in the other embodiment, the monitoring module 50 is fixed to the spacer 40. Both embodiments allow the monitoring module 50 to be integrated into the battery cell 100, thereby achieving the effect of the monitoring module 50 monitoring the battery cell 100.

[0091] Please refer to Figures 4 and 5, wherein Figure 4 shows a schematic diagram of the structure of the battery cell 100 before installation provided in one embodiment of the present application, and Figure 5 shows a partial enlarged view of the structure of the battery cell 100 before installation provided in one embodiment of the present application. In this embodiment, the monitoring module 50 is fixed to the cover assembly 20.

[0092] Specifically, as shown in Figures 4 and 5 , the tab 31 is divided into a first tab 31a and a second tab 31b. The first tab 31a is located on the side of the electrode core 30 facing the first body 22a and extends toward the first body 22a. The first tab 31a is fixedly connected to the first lead tab 211a on the first body 22a. The second tab 31b is located on the side of the electrode core 30 facing the second body 22b and extends toward the second body 22b. The second tab 31b is fixedly connected to the second lead tab 211b on the second body 22b, allowing the battery cell 100 to be electrically connected to an electrical device through the electrode 21.

[0093] The monitoring module 50 is mounted on the second main body 22b. The first conductive member 71 is welded to the first pole 21a, and the second conductive member 72 is welded to the second pole 21b. The monitoring module 50 is electrically connected to the first pole 21a via the first conductive member 71 and to the second pole 21b via the second conductive member 72.

[0094] In another embodiment, the monitoring module 50 may also be disposed on the first body 22a. In other embodiments, at least one of the first conductive member 71 and the second conductive member 72 may also be welded to the tab 31, thereby also achieving electrical connection between the monitoring module 50 and the pole core 30.

[0095] In one embodiment, as shown in FIG4 , a receiving groove 80 is provided on the side of the main body 22 facing the inner cavity. The receiving groove 80 is used to receive and fix the monitoring module 50 and part of the conductive member 70. The receiving groove 80 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.

[0096] In addition, it should be noted that in Figure 4, the cover assembly 20 has not yet been fixedly connected to the housing 10, and the tabs 31 have not yet been folded and are in a straight state. In another embodiment, as shown in Figure 1, the cover assembly 20 is fixedly connected to the housing 10, and the tabs 31 are in a folded state.

[0097] Please refer to Figures 6, 7 and 8, wherein Figure 6 shows a schematic diagram of the partial structure of the battery cell 100 from one perspective provided in an embodiment of the present application, Figure 7 shows a schematic diagram of the partial structure of the battery cell 100 from another perspective provided in an embodiment of the present application, and Figure 8 shows a schematic diagram of the partial structure of the battery cell 100 provided in an embodiment of the present application.

[0098] In one embodiment, the first foil 71 c is welded to the first pole 21 a on the first cover assembly 20 a , so that the first foil 71 c is electrically connected to the first pole 21 a . The first foil 71 c is a part of the first conductive member 71 .

[0099] In another embodiment, as shown in FIG6 and FIG7 , the first foil 71 c is welded to the first lead-out piece 211 a on the first cover plate assembly 20 a , so that the first foil 71 c is electrically connected to the first pole 21 a .

[0100] In one embodiment, the first pole 21a is provided with a first groove 212a, and the first groove 212a at least partially accommodates the first foil 71c. Placing the first foil 71c in the first groove 212a can improve the reliability of the connection between the first foil 71c and the first pole 21a, and also facilitate the positioning of the first foil 71c when welding to the first pole 21a.

[0101] In another embodiment, as shown in FIG. 8 , the first groove 212 a may also be provided on the first lead-out piece 211 a .

[0102] Please refer to Figures 9, 10 and 11, wherein Figure 9 shows a schematic diagram of the partial structure of the battery cell 100 from one perspective provided in an embodiment of the present application, Figure 10 shows a schematic diagram of the partial structure of the battery cell 100 from another perspective provided in an embodiment of the present application, and Figure 11 shows a schematic diagram of the partial structure of the battery cell 100 provided in an embodiment of the present application.

[0103] In one embodiment, the monitoring module 50 is fixed to the second 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 pole 21b, so that the monitoring module 50 and the second pole 21b are electrically connected.

[0104] In another embodiment, as shown in Figures 9 and 10, the monitoring module 50 is fixed to 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, so that the monitoring module 50 is conductive with the second pole 21b.

[0105] In one embodiment, the second pole 21b is provided with a second groove 212b, which at least partially accommodates the second foil 71a. Placing the second foil 71a in the second groove 212b can improve the reliability of the connection between the second foil 71a and the second pole 21b, and also facilitate the positioning of the second foil 71a when welding to the second pole 21b.

[0106] In another embodiment, as shown in FIG. 11 , the second groove 212 b may also be provided on the second lead-out piece 211 b .

[0107] Please refer to Figures 12, 13 and 14, wherein Figure 12 shows a schematic diagram of the partial structure of the battery cell 100 before installation provided in an embodiment of the present application, Figure 13 shows a partially enlarged view of the structure of the battery cell 100 before installation provided in an embodiment of the present application, and Figure 14 shows a partially enlarged view of the structure of the battery cell 100 before installation provided in an embodiment of the present application.

[0108] In one embodiment, 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 different poles 21 respectively.

[0109] In one embodiment, as shown in FIG12 , there are two cover plate assemblies 20, and the two cover plate assemblies 20 are arranged on both sides of the pole core 30, that is, the first cover plate assembly 20a and the second cover plate assembly 20b are located on both sides of the pole core 30. A spacer 40 is fixed between the cover plate assembly 20 and the pole core 30, that is, a first spacer 40a is provided between the first cover plate assembly 20a and the pole core 30, and a second spacer 40b is provided between the second cover plate assembly 20b and the pole core 30.

[0110] In one embodiment, the battery cell 100 includes a side plate 60 , which is connected between the first spacer 40 a and the second spacer 40 b .

[0111] In one embodiment, the side plate 60 includes a first side plate 60 a and a second side plate 60 b , and the first side plate 60 a and the second side plate 60 b are respectively located on two sides of the pole core 30 .

[0112] In some embodiments, the conductive member 70 is at least partially embedded or preset inside the first side plate 60 a.

[0113] In one embodiment, as shown in FIG12 and FIG13 , a wire 71 b is embedded in the first side plate 60 a , with two ends of the wire 71 b extending toward the first spacer 40 a and the second spacer 40 b , respectively.

[0114] In this embodiment, the wire 71b is embedded in the first side plate 60a. The first side plate 60a and the wire 71b are integrated into one component, eliminating the need to arrange the wire 71b in the inner cavity. Furthermore, when the housing 10 is installed, the wire 71b disposed in the first side plate 60 is less likely to come into contact with the housing 10, thereby preventing breakage of the wire 71b due to contact with the housing 10. Furthermore, this prevents displacement of the wire 71b after the electrolyte is injected into the battery cell 100.

[0115] In another embodiment, the wire 71 b may also be embedded in the second side plate 60 b to protect the conductive member 70 .

[0116] In other embodiments, the conductive member 70 may be partially embedded or preset inside the first side plate 60 a and the second side plate 60 b , which can also protect the conductive member 70 .

[0117] In one embodiment, there may be multiple first side plates 60a and second side plates 60b, and the wires 71b on multiple first side plates 60a can all enable the monitoring module 50 located on the spacers 40 on both sides of the pole core 30 or the cover plate assembly 20 to be electrically connected to the pole core 30.

[0118] In one embodiment, as shown in FIG13 , the first body 22a includes a first foil 71c fixed to the side of the first body 22a facing the inner cavity. The first foil 71c is electrically connected to the monitoring module 50 and the end of the wire 71b facing the first body 22a.

[0119] In one embodiment, as shown in Figure 14, the second body 22b includes a second foil 71a, which is fixed to the side of the second 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 body 22b.

[0120] In one embodiment, as shown in Figures 12 to 14, the first foil 71c, the wire 71b and the second foil 71a are electrically connected in sequence to form a first conductive member 71, and the first conductive member 71 is electrically connected to the monitoring module 50 and the first lead-out piece 211a of the first pole 21a.

[0121] In other embodiments, the first conductive member 71 includes 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 or the electrode post 21, thereby electrically connecting the monitoring module 50 to the electrode core 30.

[0122] In other embodiments, the first foil 71c, the conductive wire 71b, and the second foil 71a may all be in a foil-shaped or wire-shaped shape or other shapes that can form an electrical connection.

[0123] Please refer to Figures 15 and 16, wherein Figure 15 shows a partial cross-sectional schematic diagram of the battery cell 100 provided in an embodiment of the present application, and Figure 16 shows a partial cross-sectional schematic diagram of the battery cell 100 provided in an embodiment of the present application.

[0124] In one embodiment, the cover plate 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 20.

[0125] In one embodiment, as shown in Figure 15, the first main body 22a is provided with a first cover spacer 23a on the side facing the inner cavity. The first cover spacer 23a includes a first card slot 26a facing the side facing the inner cavity. The first card slot 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.

[0126] In another embodiment, as shown in Figure 16, 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 slot 26b facing the side facing the inner cavity. The second card slot 26b can also fix and accommodate part of the wire 71b, which can also prevent the wire 71b from moving in the inner cavity or contacting other components in the battery cell 100 and causing breakage.

[0127] Please refer to Figures 17 and 18 . Figure 17 shows a schematic diagram of the structure of a battery cell 100 before installation in another embodiment of the present application. Figure 18 shows a schematic diagram of a portion of the structure of a battery cell 100 in another embodiment of the present application. In this embodiment, the monitoring module 50 is fixed to the spacer 40 .

[0128] Specifically, as shown in Figure 17, the tab 31 is divided into a first tab 31a and a second tab 31b. The first tab 31a and the second tab 31b respectively pass through the first spacer 40a and the second spacer 40b and are electrically connected to the first pole 21a and the second pole 21b. Please refer to Figures 19, 20, and 21, wherein Figure 19 shows a schematic diagram of the partial structure of the battery cell 100 before installation provided in another embodiment of the present application, Figure 20 shows an enlarged partial view of the structure of the battery cell 100 before installation provided in another embodiment of the present application, and Figure 21 is a schematic diagram of the partial structure of the battery cell 100 provided in another embodiment of the present application.

[0129] In one embodiment, the spacer 40 includes a hollow area 90 , one end of the conductive member 70 passes through the hollow area 90 and is welded to the tab 31 , and the other end is electrically connected to the monitoring module 50 , so that the monitoring module 50 is conductively connected to the pole core 30 .

[0130] In another embodiment, the conductive member 70 is embedded in the spacer 40 , one end of the conductive member 70 is welded to the tab 31 , and the other end is electrically connected to the monitoring module 50 , so that the monitoring module 50 and the electrode core 30 are electrically connected.

[0131] In one embodiment, as shown in FIG19 , the monitoring module 50 is fixed to the second spacer 40 b, the first conductive member 71 is welded to the first pole 21 a, and the second conductive member 72 is welded to the second tab 31 b. The monitoring module 50 is electrically connected to the first pole 21 a via the first conductive member 71 and to the second tab 31 b via the second conductive member 72.

[0132] In another embodiment, the monitoring module 50 may also be fixed on the first spacer 40a.

[0133] In another embodiment, the first conductive member 71 and the second conductive member 72 can be welded to the pole tab 31 or the pole post 21 , which can also achieve electrical conduction between the monitoring module 50 and the pole core 30 .

[0134] In the above specific embodiments, various methods of disposing the conductive member 70 are used to make the monitoring module 50 and the pole core 30 conductive, so as to achieve normal operation of the monitoring module 50 .

[0135] In one embodiment, the spacer 40 is provided with a buckle, and the monitoring module 50 is snap-connected to the spacer 40 .

[0136] In one embodiment, as shown in Figures 20 and 21, the second spacer 40b is provided with a female buckle of a snap buckle, and the monitoring module 50 is provided with a male buckle of a snap buckle. The monitoring module 50 cooperates with the second spacer 40b so that the monitoring module 50 is fixed on the second spacer 40b.

[0137] In another embodiment, the female buckle of the buckle can be set on the monitoring module 50, and the male buckle of the buckle can be set on the second spacer 40b.

[0138] In one embodiment, the monitoring module 50 includes a packaging body, in which the monitoring module 50 is packaged. The packaging body at least partially wraps the monitoring module 50. The packaging body is provided with a snap-fit ​​structure, and the monitoring module 50 is fixedly connected to the spacer 40 through the snap-fit ​​structure of the packaging body.

[0139] In one embodiment, as shown in Figures 20 and 21, 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 90 of the second spacer ring 40b and is welded to the second pole ear 31b, so that the monitoring module 50 is electrically connected to the second pole ear 31b.

[0140] In one embodiment, as shown in Figures 20 and 21, a second foil 71a is fixed to the second spacer 40b. One end of the second foil 71a is welded to a 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.

[0141] 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.

[0142] In one embodiment, the monitoring module 50 is provided with an inductive conductive tape, which is inserted into the interior of the pole core 30 and electrically connected to the pole core 30. The monitoring module can obtain data of the pole core 30 through the inductive conductive tape, and then monitor the performance data of the battery cell 100.

[0143] In some embodiments, as shown in Figure 25, the monitoring module 50 includes one or more of a chip 500, a processor 501 and an integrated circuit 502, so that the monitoring module 50 can monitor and store the performance parameters of the battery cell 100, and can also send the stored parameters to other receiving terminals.

[0144] 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.

[0145] In one embodiment, the first pole 21a and the first foil 71c, the first foil 71c and the wire 71b, the wire 71b and the second foil 71a, the second conductive member 72 and the second pole 21b or the second conductive member 72 and the second tab 31b are all welded to achieve fixation of the two components.

[0146] In a preferred embodiment, ultrasonic welding is used to weld the components within the battery cell 100. Soldering is typically used to weld components within the battery cell 100. However, due to the presence of electrolyte within the internal cavity, corrosion-resistant adhesive must be applied to the solder joints to protect them. Furthermore, the curing of the corrosion-resistant adhesive takes a long time, which increases the number of assembly steps and the time required to assemble the battery cell 100. Using ultrasonic welding can reduce the time required to assemble the battery cell 100.

[0147] In one embodiment, the conductive member 70 includes a laser welding portion, which is fixedly connected to the pole 21 or the pole lug 31, so that the monitoring module 50 is electrically connected to the pole core 30 through the laser welding portion. In this embodiment, laser welding is used to weld the internal components of the battery cell 100. In a preferred embodiment, the pole 21 is welded to the main body 22, and the conductive member 70 can be welded simultaneously during the welding process of the pole 21. For example, during the process of welding the first pole 21a to the first main body 22a, the first foil 71c can also be simultaneously welded to the first lead-out piece 211a of the first pole 21a; during the process of welding the second pole 21b to the second main body 22b, the second conductive member 72 can also be simultaneously welded to the second lead-out piece 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 transportation and assembly.

[0148] In a preferred embodiment, the battery cell 100 includes a positive electrode tab 31 and a negative electrode post 21 . The positive electrode tab 31 and the negative electrode post 21 are made of aluminum, and the negative electrode tab 31 and the negative electrode post 21 are made of nickel-plated copper.

[0149] In a preferred embodiment, the conductive member 70 is welded to the tab 31 or the pole post 21 serving as the positive electrode and the negative electrode, respectively. When the conductive member 70 is welded to the tab 31 or the pole post 21 serving as the positive electrode, the material of the conductive member 70 is the same as that of the tab 31 or the pole post 21 serving as the positive electrode; when the conductive member 70 is welded to the tab 31 or the pole post 21 serving as the negative electrode, the material of the conductive member 70 is the same as that of the tab 31 or the pole post 21 serving as the negative electrode.

[0150] In a preferred embodiment, the conductive member 70 welded to the positive electrode is made of aluminum, and the conductive member 70 welded to the negative electrode is made of nickel-plated copper.

[0151] According to an embodiment of the present disclosure, a battery pack 1000 , as shown in FIG. 22 , includes the battery cell 100 and the tray 200 described in any of the above embodiments, and the battery cell 100 is disposed inside the tray 200 .

[0152] According to an embodiment of the present disclosure, the electric device 2000, as shown in FIG23 , includes the battery cell 100 described in any of the above embodiments; or, as shown in FIG24 , includes the battery pack 1000 described in the above embodiments. The battery cell 100 or the battery pack 200 is electrically connected to the electric device 2000 to supply power to the electric device 2000. In the description of this specification, the reference terms “one embodiment,” “some embodiments,” “illustrative embodiments,” “example,” “specific example,” or “some examples” refer to descriptions such as “one embodiment,” “some embodiments,” and “examples.” It is intended that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the 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 an appropriate manner in any one or more embodiments or examples.

Claims

1. A battery cell (100), characterized in that: include: Cover plate assembly (20); Housing (10); a pole core (30), the pole core (30) being fixed in an inner cavity formed by the cover plate assembly (20) and the housing (10); a spacer (40), the spacer (40) being fixed to a side of the pole core (30) facing the cover plate assembly (20), the pole core (30) being provided with a pole ear (31), the pole ear (31) passing through the spacer (40) and being fixed to the cover plate assembly (20); and A monitoring module (50) is fixed to the cover plate assembly (20) or the spacer (40), and the monitoring module (50) is electrically connected to the tab (31) for powering the monitoring module (50).

2. The battery cell (100) according to claim 1, characterized in that: The cover plate assembly (20) comprises a main body (22) and a pole (21), wherein the pole (21) is embedded in the main body (22), and the pole lug (31) passes through the spacer (40) and is electrically connected to the pole (21).

3. The battery cell (100) according to claim 2, characterized in that: The battery cell (100) comprises 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) is welded to the tab (31), so that the monitoring module (50) is electrically connected to the tab (31); and / or The other end of the conductive member (70) is welded to the pole (21), so that the monitoring module (50) is electrically connected to the pole lug (31) via the pole (21).

4. The battery cell (100) according to claim 3, characterized in that: The monitoring module (50) is fixed to the side of the main body (22) facing the inner cavity, and the conductive member (70) is fixed to the main body (22) and welded to the pole (21).

5. The battery cell (100) according to claim 4, characterized in that: The main body (22) is provided with a receiving groove (80) on one side facing the inner cavity, and the receiving groove (80) is used to receive and fix the monitoring module (50) and part of the conductive member (70).

6. The battery cell (100) according to any one of claims 3 to 5, characterized in that: The monitoring module (50) is fixed to the spacer (40), the spacer (40) includes a hollow area (90), the conductive member (70) passes through the hollow area and is welded to the tab (31); and / or The conductive member (70) is at least partially embedded in the spacer (40) and welded to the tab (31).

7. The battery cell (100) according to claim 6, characterized in that: The spacer (40) is provided with a buckle, and the monitoring module (50) is snap-connected to the spacer (40).

8. The battery cell (100) according to any one of claims 1 to 7, characterized in that: The monitoring module (50) includes one or more of a chip (500), a processor (501) and an integrated circuit (502).

9. The battery cell (100) according to any one of claims 3 to 7, characterized in that: There are two main bodies (22), and the two main bodies (22) are respectively located on opposite sides of the pole core (30). Each main body (22) is provided with a pole column (21), and a spacer (40) is fixed between each main body (22) and the pole core (30).

10. The battery cell (100) according to claim 9, characterized in that: The monitoring module (50) is fixed to one side of the pole core (30), the battery core comprises a first side plate (60a) and a second side plate (60b), the first side plate (60a) and the second side plate (60b) are both connected between the two spacers (40) and are respectively located on opposite sides of the spacers (40), the conductive member (70) conducts between the monitoring module (50) and the pole (21) located on the other side of the pole core (30), and the conductive member (70) is at least partially embedded or preset inside the first side plate (60a); or The conductive member (70) is at least partially embedded or preset inside the first side plate (60a) and the second side plate (60b).

11. The battery cell (100) according to any one of claims 2 to 7, characterized in that: The number of the main body (22) is one, and two poles (21) are provided on the main body (22). The pole ears (31) are both located on the side of the pole core (30) facing the main body (22), and are electrically connected to different poles (21) respectively.

12. The battery cell (100) according to any one of claims 3 to 7, characterized in that: The pole (21) includes a lead-out piece (211), the lead-out piece (211) is used to be electrically connected to the pole lug (31), and the conductive member (70) is welded to the lead-out piece (211) to be electrically connected to the pole lug (31).

13. The battery cell (100) according to any one of claims 3 to 7 and 12, characterized in that: The conductive member (70) includes a laser welding portion, the laser welding portion is fixedly connected to the pole (21) or the pole lug (31), and the monitoring module (50) is electrically connected to the pole core (30) via the laser welding portion.

14. The battery cell (100) according to any one of claims 2 to 7 and 11, characterized in that: 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 (100).

15. A battery pack (1000), characterized in that: include: The battery cell (100) according to any one of claims 1 to 14; and A tray (200), wherein a plurality of the battery cells (100) are arranged in the tray (200).

16. An electrical device (2000), characterized in that: include: The battery cell (100) according to any one of claims 1 to 14; or According to the battery pack (1000) of claim 15, the battery cell (100) or the battery pack (1000) is electrically connected to the electrical device (2000) to supply power to the electrical device (2000).

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