Battery cell, battery pack and power utilization device

Abstract

The utility model discloses a battery cell, a battery pack and a power utilization device. The battery cell comprises a cover plate assembly and a battery pack, the space ring is arranged on one side, facing the interior of the battery cell, of the cover plate assembly; and the monitoring module is fixed on the cover plate assembly or the space ring. According to the battery cell provided by the embodiment of the utility model, the monitoring module can be arranged in the battery cell, and the installation difficulty of the monitoring module is low, so that the installation steps of the monitoring module are simplified, and the battery cell is more convenient and rapid to assemble.

Description

[0001] Cross - reference to related applications

[0002] This application is based on and claims priority to a Chinese patent application with the application number 202420413395.7 and the filing date of February 29, 2024. The entire content of this Chinese patent application is incorporated herein by reference. Technical field

[0003] The utility model relates to the technical field of batteries, and in particular, to a battery cell, a battery pack, and an electrical device. Background art

[0004] In related art, a monitoring module is usually provided inside a battery cell. The monitoring module can be used to monitor the working state of the battery cell, so as to monitor the temperature change and gas production inside the battery cell in real time during the working process of the battery cell, thereby improving the working safety of the battery cell.

[0005] However, since there is no installation position for the detection module inside the battery cell in related art, and the internal components of the battery cell housing are compact and the available space is small, the monitoring module cannot be reliably fixed inside the battery cell. Summary of the utility model

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a battery cell that can install the monitoring module inside the battery cell, and the installation difficulty of the monitoring module is low, which is beneficial to simplifying the installation steps of the monitoring module and making the battery cell assembly more convenient and fast.

[0007] The utility model also provides a battery pack having the above - mentioned battery cell.

[0008] The utility model also provides an electrical device having the above - mentioned battery pack.

[0009] To achieve the above object, according to a first - aspect embodiment of the utility model, a battery cell is provided, the battery cell includes: a cover plate assembly; a spacer ring disposed on a side of the cover plate assembly facing the inside of the battery cell; and a monitoring module fixed to the cover plate assembly or the spacer ring.

[0010] The battery cell according to the embodiment of the utility model can install the monitoring module inside the battery cell, and the installation difficulty of the monitoring module is low, which is beneficial to simplifying the installation steps of the monitoring module and making the battery cell assembly more convenient and fast.

[0011] According to some embodiments of the utility model, the cover plate assembly includes: a terminal; a main body, the terminal is embedded in the main body, and the monitoring module is fixed to the main body.

[0012] According to some embodiments of the present utility model, the monitoring module is fixed to one side of the main body facing the inside of the battery cell.

[0013] According to some embodiments of the present utility model, a receiving groove is provided on one side of the main body facing the inside of the battery cell, and the receiving groove is used for receiving and fixing the monitoring module.

[0014] According to some embodiments of the present utility model, the battery cell further includes: a tab, the tab passes through the spacer and is electrically connected to the terminal; 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 connected to the tab and / or the terminal.

[0015] According to some embodiments of the present utility model, the other end of the conductive member is welded to the tab to electrically connect the monitoring module to the tab; and / or, the other end of the conductive member is welded to the terminal to electrically connect the monitoring module to the tab through the terminal.

[0016] According to some embodiments of the present utility model, the terminal includes a lead-out piece, the terminal is electrically connected to the tab through the lead-out piece, and the conductive member is electrically connected to the tab through the lead-out piece.

[0017] According to some embodiments of the present utility model, the conductive member is welded to the lead-out piece.

[0018] According to some embodiments of the present utility model, the spacer is provided with a buckle, and the buckle engages with the monitoring module for engaging the monitoring module on the spacer.

[0019] According to some embodiments of the present utility model, the monitoring module includes a package body, the package body is provided with a buckle structure, and the monitoring module is fixedly connected to the spacer through the buckle structure of the package body.

[0020] According to some embodiments of the present utility model, the spacer is provided with a female buckle, the monitoring module is provided with a male buckle, and the female buckle and the male buckle cooperate; or, the spacer is provided with a male buckle, the monitoring module is provided with a female buckle, and the female buckle and the male buckle cooperate.

[0021] According to some embodiments of the present utility model, the monitoring module includes at least one of a chip, a processor, and an integrated circuit.

[0022] According to some embodiments of the present utility model, the battery cell further includes: a core, and the core is disposed on one side of the spacer facing the inside of the battery cell.

[0023] According to some embodiments of the present utility model, the cover plate assemblies and the spacer rings are provided on both opposite sides of the electrode core, and the monitoring module is fixed to the cover plate assembly or the spacer ring on one side of the electrode core.

[0024] According to some embodiments of the present utility model, the monitoring module is provided with an induction conductive belt, and the induction conductive belt is inserted into the electrode core and electrically connected to the electrode core to monitor the performance data of the battery cell.

[0025] According to some embodiments of the present utility model, there are multiple monitoring modules, and multiple monitoring modules are simultaneously arranged on the cover plate assembly or the spacer ring; or, a certain number of monitoring modules are arranged on the cover plate assembly, and a certain number of monitoring modules are arranged on the spacer ring.

[0026] According to an embodiment of the second aspect of the present utility model, a battery pack is provided, and the battery pack includes: a battery cell according to the embodiment of the first aspect of the present utility model; a tray, and the battery cell is arranged in the tray.

[0027] For the battery pack according to the embodiment of the second aspect of the present utility model, by using the battery cell according to the embodiment of the first aspect of the present utility model, the monitoring module can be arranged inside the battery cell, and the installation difficulty of the monitoring module is low, which is beneficial to simplifying the installation steps of the monitoring module, and the assembly of the battery cell is more convenient and fast.

[0028] According to an embodiment of the third aspect of the present utility model, an electrical device is provided, and the electrical device includes the battery cell according to the embodiment of the first aspect of the present utility model or the battery pack according to the embodiment of the second aspect of the present utility model, and the battery cell or the battery pack supplies power to the electrical device.

[0029] For the electrical device according to the embodiment of the third aspect of the present utility model, by using the battery cell according to the embodiment of the first aspect of the present utility model or the battery pack according to the embodiment of the second aspect of the present utility model, the monitoring module can be arranged inside the battery cell, and the installation difficulty of the monitoring module is low, which is beneficial to simplifying the installation steps of the monitoring module, and the assembly of the battery cell is more convenient and fast.

[0030] The additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0032] Figure 1Schematic diagram of the cell decomposition structure according to an embodiment of the present utility model;

[0033] Figure 2 Schematic diagram of the cell structure according to an embodiment of the present utility model;

[0034] Figure 3 Schematic diagram of the cell structure from another perspective according to an embodiment of the present utility model;

[0035] Figure 4 Schematic diagram of the cell structure before installation according to an embodiment of the present utility model;

[0036] Figure 5 Partial enlarged view of the cell structure before installation according to an embodiment of the present utility model;

[0037] Figure 6 Schematic diagram of a partial structure of the cell according to an embodiment of the present utility model;

[0038] Figure 7 Schematic diagram of a partial structure of the cell from another perspective according to an embodiment of the present utility model;

[0039] Figure 8 Schematic diagram of a partial structure of the cell according to an embodiment of the present utility model;

[0040] Figure 9 Schematic diagram of a partial structure of the cell from another perspective according to an embodiment of the present utility model;

[0041] Figure 10 Schematic diagram of a partial structure of the cell from yet another perspective according to an embodiment of the present utility model;

[0042] Figure 11 Schematic diagram of a partial structure of the cell according to an embodiment of the present utility model;

[0043] Figure 12 Schematic diagram of a partial structure of the cell before installation according to an embodiment of the present utility model;

[0044] Figure 13 Partial enlarged view of the cell structure before installation according to an embodiment of the present utility model;

[0045] Figure 14 Partial enlarged view of the cell structure before installation according to an embodiment of the present utility model;

[0046] Figure 15 Schematic diagram of a partial cross-section of the cell according to an embodiment of the present utility model;

[0047] Figure 16 Schematic diagram of a partial cross-section of the cell according to an embodiment of the present utility model;

[0048] Figure 17 It is a schematic diagram of the cell structure before installation according to another embodiment of the present utility model;

[0049] Figure 18 It is a schematic diagram of a partial structure of the cell according to another embodiment of the present utility model;

[0050] Figure 19 It is a schematic diagram of a partial structure of the cell before installation according to another embodiment of the present utility model;

[0051] Figure 20 It is an enlarged partial view of the cell structure before installation according to another embodiment of the present utility model;

[0052] Figure 21 It is a schematic diagram of a partial structure of the cell according to another embodiment of the present utility model.

[0053] Reference numerals:

[0054] 100, cell;

[0055] 10, housing;

[0056] 20, cover assembly; 20a, first cover assembly; 20b, second cover assembly; 21, terminal; 21a, first terminal; 21b, second terminal; 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; 23a, first cover spacer; 23b, second cover spacer; 24, liquid injection port; 25, explosion-proof valve; 26a, first card slot; 26b, second card slot;

[0057] 30, electrode core; 31, tab; 31a, first tab; 31b, second tab;

[0058] 40, spacer; 40a, first spacer; 40b, second spacer;

[0059] 50, monitoring module;

[0060] 60, side plate; 60a, first side plate; 60b, second side plate;

[0061] 70, conductive member; 71, first conductive member; 71a, second foil; 71b, wire; 71c, first foil; 72, second conductive member. Detailed implementation manners

[0062] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0063] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, 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 thus should not be construed as a limitation to the present utility model.

[0064] In the description of the present utility model, the "first feature" and "second feature" may include one or more of such features.

[0065] In the description of the present utility model, the meaning of "a plurality" is two or more, and the meaning of "several" is one or more.

[0066] The battery cell according to an embodiment of the present utility model will be described below with reference to the accompanying drawings.

[0067] The present utility model relates to an electrical device, which includes an electrically connected battery cell or battery pack. The battery pack includes a battery cell and a tray, and a plurality of battery cells are arranged in the tray. The battery cell or battery pack is used for power supply of the electrical device.

[0068] As Figure 1 , Figure 2 and Figure 3 shown, Figure 1 schematically shows an exploded structural view of a battery cell 100 provided in an embodiment of the present utility model; Figure 2 schematically shows a structural view of the battery cell 100 from one perspective provided in an embodiment of the present utility model; Figure 3 schematically shows a structural view of the battery cell 100 from another perspective provided in an embodiment of the present utility model.

[0069] The electric core 100 of the present utility model comprises a housing 10, a cover plate assembly 20, an electrode core 30, a spacer 40 and a monitoring module 50. The cover plate assembly 20 can shield the opening on the housing 10, so that the housing 10 and the cover plate assembly 20 enclose to form an inner cavity for accommodating the electrode core 30. The electrode core 30 is fixed in the inner cavity. The electrode core 30 comprises electrode tabs 31 which extend towards the cover plate assembly 20. A spacer 40 is arranged on one side of the electrode core 30 facing the cover plate assembly 20. The electrode tabs 31 pass through the spacer 40 and are fixedly connected to the cover plate assembly 20. The electric core 100 can be electrically connected to an electrical device through the electrode tabs 31 and form a circuit to meet the power demand of the electrical device.

[0070] Specifically, in one embodiment, as Figure 1 shown, the electric core 100 comprises two cover plate assemblies 20, two electrode tabs 31 and two spacers 40. One pole column 21 is respectively arranged on the main body 22 of the two cover plate assemblies 20. The cover plate assembly 20, the electrode tabs 31 and the spacers 40 are arranged on both sides of the electrode core 30. Different electrode tabs 31 extend towards different pole columns 21. The electrode tabs 31 pass through the spacers 40 and are electrically connected to the pole columns 21 on the main body 22. The electrode core 30 is conducted with the pole columns 21 through the electrode tabs 31, so that the electric core 100 can supply power to the electrical device through the pole columns 21.

[0071] The electric core 100 of the present utility model is also provided with a monitoring module 50. The monitoring module 50 is fixed to the cover plate assembly 20 or the spacer 40. The monitoring module 50 is respectively electrically connected to the electrode tabs 31, so that a circuit is formed between the monitoring module 50 and the electrode core 30 to realize the power supply of the monitoring module 50.

[0072] Specifically, in one embodiment, as Figure 1 shown, the monitoring module 50 is fixed on the cover plate assembly 20. The cover plate assembly 20 is provided with a pole column 21. A lead-out piece 211 is arranged at one end of the pole column 21 facing the inner cavity. The lead-out piece 211 is electrically connected between the pole column 21 and the electrode tab 31. At the same time, the electric core 100 is also provided with a conductive member 70. One end of the conductive member 70 extends towards 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 electrode core 30 is conducted with the monitoring module 50 to realize the power supply of the monitoring module 50.

[0073] The electric core 100 of the present utility model is internally provided with a monitoring module 50. The monitoring module 50 is used for monitoring the performance indexes of the electric core 100. The monitoring module 50 forms a circuit with the electrode core 30 through the electrode tabs 31. The electric core 100 supplies power to the monitoring module 50 through the electrode tabs 31. In this way, the monitoring module 50 can collect and store the performance indexes such as gas production, temperature and pressure inside the electric core 100, and can also wirelessly transmit the collected performance data of the electric core 100 to other terminals, and the other terminals analyze and process the performance data of the electric core 100.

[0074] It should be noted that in the prior art, there is no installation position for the monitoring module 50 inside the battery cell 100. It is difficult to fix the monitoring module 50 in the battery cell 100, and the connection strength between the monitoring module 50 and the battery cell 100 is relatively low. As the usage time of the battery cell 100 increases, it is more likely to cause the monitoring module 50 to fail. Moreover, due to the compact internal structure of the battery cell 100 and the relatively small available space, it is difficult to install the monitoring module 50. The monitoring module 50 and its power supply circuit both require high-precision installation to ensure that during the subsequent installation process 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, protecting the monitoring module 50 and its power supply circuit and reducing the impact of the environment on the monitoring module 50, enabling the monitoring module 50 to have a better monitoring effect.

[0075] In the present utility model, by fixing the monitoring module 50 of the battery cell 100 on the cover plate assembly 20 or the spacer 40, the monitoring module 50 is pre-integrated on the cover plate assembly 20 or the spacer 40. During the assembly process of the battery cell 100, the monitoring module 50 will be disposed in the battery cell 100 along with the installation of the cover plate assembly 20 or the spacer 40. Thereby, the assembly steps of the battery cell 100 can be simplified, the installation difficulty of the monitoring module 50 is reduced, and the assembly of the battery cell 100 is more convenient and rapid.

[0076] In addition, since the tab 31 passes through the spacer 40 and is fixedly connected to the cover plate assembly 20, and the monitoring module 50 is disposed on the cover plate assembly 20 or the spacer 40, the monitoring module 50 can be closer to the tab 31, and it is also more convenient to arrange the power supply circuit of the monitoring module 50. For example, when the monitoring module 50 is disposed on the cover plate assembly 20, the power supply circuit between the monitoring module 50 and the terminal post 21 can be pre-embedded on the cover plate assembly 20 or pre-buried inside the cover plate assembly 20; when the monitoring module 50 is disposed on the spacer 40, the power supply circuit between the monitoring module 50 and the tab 31 can also be pre-embedded on the spacer 40 or pre-buried inside the spacer 40. The above arrangements can all reduce the installation difficulty of the power supply circuit of the monitoring module 50 and make the power supply circuit of the monitoring module 50 have higher reliability.

[0077] It should be pointed out that the battery cell 100 of the present utility model can be applied to an electrical device or a battery pack and used as a power supply component. However, the battery cell 100 is not limited to being applied to an electrical device or a battery pack. In other electrical systems that require power supply, the battery cell 100 in the embodiments of the present utility model is equally applicable and has higher reliability.

[0078] In one embodiment, as Figure 1 shown, the cover plate assembly 20 includes a terminal post 21 and a main body 22. The terminal post 21 is embedded in the main body 22. The tab 31 passes through the spacer 40 and is electrically connected to the terminal post 21. The monitoring module 50 is fixed to the main body 22.

[0079] In one embodiment, the tab 31 passes through the spacer 40 and is fixed to one end of the terminal 21 facing the electrode core 30, so that the terminal 21 is electrically connected to the electrode core 30 through the tab 31.

[0080] In another embodiment, as Figure 1 shown, the terminal 21 includes a lead-out piece 211. The lead-out piece 211 is located at one end of the terminal 21 facing the electrode core 30, and the tab 31 is fixedly connected to the lead-out piece 211 on the terminal 21. Compared with the columnar terminal 21, the contact surface area of the lead-out piece 211 is larger. Fixing the tab 31 on the lead-out piece 211 makes the connection between the tab 31 and the terminal 21 more reliable. At the same time, the larger contact area can reduce the resistance between the tab and the terminal, thereby reducing the energy loss during the process of electricity conduction from the terminal 21 to the electrical device.

[0081] In one embodiment, as Figure 1 shown, 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 terminal 21, so that the monitoring module 50 is electrically connected to the tab 31, thereby realizing the power supply of the monitoring module 50.

[0082] In one embodiment, as Figure 1 shown, the terminal 21 includes a lead-out piece 211. The terminal 21 is electrically connected to the tab 31 through the lead-out piece 211. The conductive member 70 is fixed to the cover plate assembly 20 and welded to the lead-out piece 211. The conductive member 70 is electrically connected to the tab 31 through the lead-out piece 211. The lead-out piece 211 can increase the contact area between the terminal 21 and the conductive member 70, and improve the conductive effect and connection strength between the terminal 21 and the conductive member 70.

[0083] In one embodiment, 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 tab 31, so that the monitoring module 50 is electrically connected to the tab 31, thereby realizing the power supply of the monitoring module 50.

[0084] In one embodiment, the conductive member 70 includes a first conductive member 71 and a second conductive member 72. One ends 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 tab 31, and the other end of the second conductive member 72 is connected to the terminal 21. In one embodiment, as Figure 2 and Figure 3 shown, the battery cell 100 includes two cover plate assemblies 20, namely a first cover plate assembly 20a and a second cover plate assembly 20b. A first terminal 21a and a second terminal 21b are respectively provided on a first main body 22a of the first cover plate assembly 20a and a second main body 22b of the second cover plate assembly 20b.

[0085] In one embodiment, as Figure 2 shown, a liquid injection port 24 is provided on the first main body 22a. The liquid injection port 24 communicates with the inner cavity, and the liquid injection port 24 is used to inject electrolyte into the inner cavity. In another embodiment, the liquid injection port 24 can also be provided on the second main body 22b or the housing 10, and the specific position of the liquid injection port 24 can be set according to the position when the battery cell 100 is injected with liquid.

[0086] In one embodiment, as Figure 3 shown, an explosion-proof valve 25 is provided on the second main body 22b. The explosion-proof valve 25 communicates the inner cavity with the outside, and the explosion-proof valve 25 can be opened to discharge the gas in the inner cavity. Gas is generated during the operation of the battery cell 100, and too much gas will cause the pressure in the inner cavity to be too high, which will affect the safety of the battery cell 100. In another embodiment, the explosion-proof valve 25 can also be provided on the first main body 22a or the housing 10, and the specific position of the explosion-proof valve 25 can be set according to the position when the battery cell 100 is injected with liquid.

[0087] There are two ways to arrange the monitoring module 50 in the battery cell 100. In one way, the monitoring module 50 is fixed to the cover plate assembly 20; in another way, the monitoring module 50 is fixed to the spacer 40. Both ways can integrate the monitoring module 50 inside the battery cell 100, so as to achieve the effect of the monitoring module 50 monitoring the battery cell 100.

[0088] Please refer to Figure 4 and Figure 5 , where Figure 4 shows a schematic structural diagram of the battery cell 100 before installation provided in an embodiment of the present invention; Figure 5 shows a partial enlarged view of the structure of the battery cell 100 before installation provided in an embodiment of the present invention. In this embodiment, the monitoring module 50 is fixed to the cover plate assembly 20.

[0089] Specifically, as Figure 4 and Figure 5 shown, 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 main body 22a and extends towards the first main body 22a. The first tab 31a is fixedly connected to the first lead piece 211a on the first main body 22a. The second tab 31b is located on the side of the electrode core 30 facing the second main body 22b and extends towards the second main body 22b. The second tab 31b is fixedly connected to the second lead piece 211b on the second main body 22b, so that the battery cell 100 can be electrically connected to the electrical device through the pole column 21.

[0090] 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 column 21.

[0091] The monitoring module 50 is disposed on the second main body 22b. The first conductive member 71 is welded to the first pole column 21a, and the second conductive member 72 is welded to the second pole column 21b. The monitoring module 50 is electrically connected to the first pole column 21a through the first conductive member 71 and is electrically connected to the second pole column 21b through the second conductive member 72.

[0092] In another embodiment, the monitoring module 50 can also be disposed on the first main body 22a. In some other embodiments, at least one of the first conductive member 71 and the second conductive member 72 can also be welded to the tab 31, and the monitoring module 50 can also be electrically connected to the electrode core 30.

[0093] In one embodiment, as Figure 4 shown, a receiving groove is provided on the inner cavity side of the main body 22. The receiving groove is used to receive and fix the monitoring module 50 and a part 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 plate assembly 20, and can also facilitate the positioning during the installation of the monitoring module 50 and the conductive member 70.

[0094] In addition, it should be noted that Figure 4 the cover plate assembly 20 is not yet fixedly connected to the housing 10. At this time, the tab 31 has not been folded and is in a straight state. In another embodiment, as Figure 1 shown, the cover plate assembly 20 is fixedly connected to the housing 10. At this time, the tab 31 is in a folded state.

[0095] Please refer to Figure 6 、 Figure 7 and Figure 8 wherein Figure 6 shows a partial structural schematic diagram of the electrode core 100 from one perspective provided in an embodiment of the present invention; Figure 7 shows a partial structural schematic diagram of the electrode core 100 from another perspective provided in an embodiment of the utility model; Figure 8 shows a partial structural schematic diagram of the electrode core 100 provided in an embodiment of the present invention.

[0096] In one embodiment, the first foil 71c is welded to the first pole column 21a on the first cover plate assembly 20a, so that the first foil 71c is electrically connected to the first pole column 21a. Among them, the first foil 71c is a part of the first conductive member 71.

[0097] In another embodiment, as Figure 6 and Figure 7 shown, the first foil 71c is welded to the first lead-out piece 211a on the first cover plate assembly 20a, so that the first foil 71c is electrically connected to the first pole column 21a.

[0098] In one embodiment, the first pole 21a is provided with a first groove 212a, and the first groove 212a at least partially houses the first foil 71c. Disposing the first foil 71c within 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 during the welding of the first foil 71c and the first pole 21a.

[0099] In another embodiment, as Figure 8 shown, the first groove 212a can also be disposed on the first lead piece 211a.

[0100] Please refer to Figure 9 、 Figure 10 and Figure 11 wherein, Figure 9 schematically shows a partial structural diagram of the battery cell 100 from one perspective provided in an embodiment of the present utility model; Figure 10 schematically shows a partial structural diagram of the battery cell 100 from another perspective provided in an embodiment of the present utility model; Figure 11 schematically shows a partial structural diagram of the battery cell 100 provided in an embodiment of the present utility model.

[0101] In one embodiment, 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 pole 21b, so that the monitoring module 50 is electrically connected to the second pole 21b.

[0102] In another embodiment, as Figure 9 and Figure 10 shown, 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 piece 211b, so that the monitoring module 50 is electrically connected to the second pole 21b.

[0103] In one embodiment, the second pole 21b is provided with a second groove 212b, and the second groove 212b at least partially houses the second foil 71a. Disposing the second foil 71a within 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 during the welding of the second foil 71a and the second pole 21b.

[0104] In another embodiment, as Figure 11 shown, the second groove 212b can also be disposed on the second lead piece 211b.

[0105] Please refer to Figure 12 、 Figure 13 and Figure 14 wherein, Figure 12Schematically shows a partial structural schematic diagram of the battery cell 100 before installation provided in an embodiment of the present utility model; Figure 13 Schematically shows a partially enlarged view of the structure of the battery cell 100 before installation provided in an embodiment of the present utility model; Figure 14 Schematically shows a partially enlarged view of the structure of the battery cell 100 before installation provided in an embodiment of the present utility model.

[0106] In one embodiment, the battery cell 100 includes a cover plate assembly 20, two pole posts 21 are provided on the cover plate assembly 20, the electrode core 30 includes two tab ears 31, both of the two tab ears 31 are located on the side of the electrode core 30 facing the cover plate assembly 20 and extend towards the cover plate assembly 20, and the two tab ears 31 are electrically connected to different pole posts 21 respectively.

[0107] In one embodiment, as Figure 12 shown, the number of the cover plate assemblies 20 is two, and the two cover plate assemblies 20 are arranged on both sides of the electrode core 30, that is, the first cover plate assembly 20a and the second cover plate assembly 20b are located on both sides of the electrode core 30. A spacer 40 is fixed between the cover plate assembly 20 and the electrode core 30, that is, a first spacer 40a is provided between the first cover plate assembly 20a and the electrode core 30, and a second spacer 40b is provided between the second cover plate assembly 20b and the electrode core 30.

[0108] In one embodiment, the battery cell 100 includes a side plate 60, and the side plate 60 is connected between the first spacer 40a and the second spacer 40b.

[0109] In one embodiment, the side plate 60 includes a first side plate 60a and a second side plate 60b, and the first side plate 60a and the second side plate 60b are respectively located on both sides of the electrode core 30.

[0110] In some embodiments, the conductive member 70 is at least partially embedded or preset inside the first side plate 60a.

[0111] In one embodiment, as Figure 1 shown, a wire 71b is embedded in the first side plate 60a, and both ends of the wire 71b extend towards the first spacer 40a and the second spacer 40b respectively. Wherein the wire 71b is a part of the first conductive member 71.

[0112] In this embodiment, the wire 71b is embedded in the first side plate 60a, and the first side plate 60a and the wire 71b are integrated into one component, which can save the assembly step of arranging the wire 71b in the inner cavity, and when the housing 10 is sleeved, the wire 71b arranged in the first side plate 60 is not easy to contact with the housing 10, and the breakage of the wire 71b caused by the contact of the housing 10 can be avoided. At the same time, the displacement of the wire 71b after the battery cell 100 is filled with electrolyte can also be prevented.

[0113] In another embodiment, the wire 71b can also be embedded in the second side plate 60b to protect the conductive member 70.

[0114] In other embodiments, the conductive member 70 can also be partially embedded or preset inside the first side plate 60a and the second side plate 60b, which can also protect the conductive member 70.

[0115] In one embodiment, the number of the first side plates 60a and the second side plates 60b can be multiple, and the wires 71b on the multiple first side plates 60a can all conduct the monitoring module 50 located on the spacer 40 or the cover plate assembly 20 on both sides of the pole core 30 to the pole core 30.

[0116] In one embodiment, as Figure 13 shown, the first main body 22a includes a first foil 71c, the first foil 71c is fixed on the side of the first main body 22a facing the inner cavity, and the first foil 71c is electrically connected to the monitoring module 50 and one end of the wire 71b facing the first main body 22a.

[0117] In one embodiment, as Figure 14 shown, the second main body 22b includes a second foil 71a, the second foil 71a is fixed on 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 one end of the wire 71b facing the second main body 22b.

[0118] In one embodiment, as Figures 12 - 14 shown, 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 piece 211a of the first pole 21a.

[0119] In other embodiments, the first conductive member 71 includes at least one of the first foil 71c, the wire 71b and the second foil 71a. For example, the first conductive member 71 includes the wire 71b, one end of the wire 71b is electrically connected to the monitoring module 50, and the other end is welded to the tab 31 or the pole 21, which can also electrically connect the monitoring module 50 to the pole core 30.

[0120] In other embodiments, the first foil 71c, the wire 71b and the second foil 71a can all be in the shape of a foil or a wire, etc., which can form an electrical connection.

[0121] Please refer to Figure 15 and Figure 16 , wherein, Figure 15 schematically shows a partial cross-sectional view of the battery cell 100 provided in an embodiment of the present invention; Figure 16 schematically shows a partial cross-sectional view of the battery cell 100 provided in an embodiment of the present invention.

[0122] In one embodiment, as Figure 15 shown, a first cover spacer 23a is provided on the inner cavity side of the first body 22a. The first cover spacer 23a includes a first card slot 26a on the inner cavity side. The first card slot 26a can fix and accommodate part of the wire 71b, preventing the wire 71b from moving in the inner cavity and preventing the wire 71b from contacting other components in the battery cell 100, which may cause the wire 71b to break.

[0123] In another embodiment, as Figure 16 shown, a second cover spacer 23b is provided on the inner cavity side of the second body 22b. The second cover spacer 23b includes a second card slot 26b on the inner cavity side. The second card slot 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, which may cause breakage.

[0124] Please refer to Figure 17 and Figure 18 , Figure 17 which shows a schematic structural diagram of the battery cell 100 before installation provided in another embodiment of the present invention; Figure 18 which shows a partial structural diagram of the battery cell 100 provided in another embodiment of the present invention. In this embodiment, the monitoring module 50 is fixed to the spacer 40.

[0125] Specifically, as Figure 17 shown, 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 respectively electrically connected to the first pole 21a and the second pole 21b. Please refer to Figure 19 , Figure 20 and Figure 21 , wherein, Figure 19 which shows a partial structural diagram of the battery cell 100 before installation provided in another embodiment of the present invention; Figure 20 which shows a partial enlarged view of the structure of the battery cell 100 before installation provided in another embodiment of the present invention; Figure 21 is a partial structural diagram of the battery cell 100 provided in another embodiment of the present invention.

[0126] In one embodiment, the spacer 40 includes a hollowed-out area. One end of the conductive member 70 passes through the hollowed-out area 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 electrically connected to the electrode core 30.

[0127] 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 is electrically connected to the electrode core 30.

[0128] In one embodiment, as Figure 19 shown, the monitoring module 50 is fixed on the second spacer 40b. The first conductive member 71 is welded to the first pole column 21a, and the second conductive member 72 is welded to the second tab 31b. The monitoring module 50 is electrically connected to the first pole column 21a through the first conductive member 71 and electrically connected to the second tab 31b through the second conductive member 72.

[0129] In another embodiment, the monitoring module 50 can also be fixed on the first spacer 40a.

[0130] In another embodiment, both the first conductive member 71 and the second conductive member 72 can be welded to the tab 31 or the pole column 21, and the monitoring module 50 can also be electrically connected to the electrode core 30.

[0131] In the above specific embodiments, through various setting methods of the conductive member 70, the monitoring module 50 is electrically connected to the electrode core 30 to enable the normal operation of the monitoring module 50.

[0132] In one embodiment, the spacer 40 is provided with a buckle, and the monitoring module 50 is snap-fitted on the spacer 40.

[0133] In one embodiment, as Figure 20 and Figure 21 shown, the second spacer 40b is provided with a female buckle of the buckle, and the monitoring module 50 is provided with a male buckle of the buckle. The monitoring module 50 and the second spacer 40b cooperate with each other, so that the monitoring module 50 is fixed on the second spacer 40b.

[0134] In another embodiment, the female buckle of the buckle can be provided on the monitoring module 50, and the male buckle of the buckle can be provided on the second spacer 40b.

[0135] In one embodiment, the monitoring module 50 includes a package body. The monitoring module 50 is encapsulated in the package body. The package body at least partially wraps the monitoring module 50. The package body is provided with a buckle structure, and the monitoring module 50 is fixedly connected to the spacer 40 through the buckle structure of the package body.

[0136] In one embodiment, as Figure 20 and Figure 21 shown, 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 40b and is welded to the second tab 31b, so that the monitoring module 50 is electrically connected to the second tab 31b.

[0137] In one embodiment, asFigure 20 and Figure 21 As shown in Figure 21 , 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 piece 211a through the first foil 71c of the first cover assembly 20a, so that the monitoring module 50 is electrically connected to the first terminal 21a, and further the monitoring module 50 is electrically connected to the electrode core 30, thereby realizing the conduction between the monitoring module 50 and the electrode core 30.

[0138] The specific expansion of each of the above embodiments can make the monitoring module 50 conduct electricity with the electrode core 30. When the battery cell 100 is working, it can also provide power for the monitoring module 50 to ensure the normal operation of the monitoring module 50.

[0139] In one embodiment, the monitoring module 50 is provided with an induction conductive strip. The induction conductive strip is inserted into the interior of the electrode core 30 and electrically connected to the electrode core 30. The monitoring module can obtain data of the electrode core 30 through the induction conductive strip, and further monitor the performance data of the battery cell 100.

[0140] 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 can also send the stored parameters to other receiving terminals.

[0141] In one embodiment, the number of the monitoring modules 50 is multiple. Multiple monitoring modules 50 can be simultaneously arranged on the cover assembly 20 or the spacer 40, or a certain number of monitoring modules 50 can be arranged on the cover assembly 20 and a certain number of monitoring modules 50 can be arranged on the spacer 40.

[0142] In one embodiment, the first terminal 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 terminal 21b or the second conductive member 72 and the second tab 31b all adopt welding to realize the fixation of two components.

[0143] In a preferred embodiment, ultrasonic welding is used for welding the internal components of the battery cell 100. Tin welding is usually used for welding between the components of the battery cell 100. Since there is electrolyte in the inner cavity, a corrosion-resistant adhesive needs to be set outside the tin welding joint to protect the tin welding joint, and the curing of the corrosion-resistant adhesive takes a long time, which will increase the assembly steps of the battery cell 100 and prolong its assembly working hours. Using ultrasonic welding for welding can shorten the assembly working hours of the battery cell 100.

[0144] In one embodiment, the conductive member 70 includes a laser welding portion, which is fixedly connected to the pole post 21 or the tab 31, so that the monitoring module 50 is electrically connected to the electrode core 30 through the laser welding portion. In this embodiment, laser welding is used for welding the internal components of the battery cell 100. In a preferred embodiment, the pole post 21 is welded to the main body 22, and during the welding process of the pole post 21, the conductive member 70 can be welded synchronously. For example, during the welding process of the first pole post 21a to the first main body 22a, the first foil 71c can also be welded synchronously to the first lead piece 211a of the first pole post 21a; during the welding process of the second pole post 21b to the second main body 22b, the second conductive member 72 can also be welded synchronously to the second lead piece 211b of the second pole post 21b. This operation can reduce the risk of damage to the monitoring module 50 and the conductive member 70 during handling and assembly.

[0145] In a preferred embodiment, the battery cell 100 includes tabs 31 and pole posts 21 serving as the positive electrode and the negative electrode respectively. The materials of the tabs 31 and pole posts 21 serving as the positive electrode are aluminum, and the materials of the tabs 31 and pole posts 21 serving as the negative electrode are nickel-plated copper.

[0146] 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.

[0147] In a preferred embodiment, the material of the conductive member 70 welded to the positive electrode is aluminum, and the material of the conductive member 70 welded to the negative electrode is nickel-plated copper.

[0148] The other configurations and operations of the battery cell, battery pack, and electrical device according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0149] In the description of this specification, the descriptions referring to the terms "specific embodiment", "specific example", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0150] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery cell, characterized in that: include: Cover plate assembly; A spacer, the spacer being arranged on a side of the cover plate assembly facing the interior of the battery cell; A monitoring module is fixed to the cover plate assembly or the spacer.

2. The battery cell according to claim 1, characterized in that: The cover plate assembly comprises: Pole; The main body, the pole is embedded in the main body, and the monitoring module is fixed to the main body.

3. The battery cell according to claim 2, characterized in that: The monitoring module is fixed to a side of the main body facing the inside of the battery cell.

4. The battery cell according to claim 3, characterized in that: A receiving groove is provided on one side of the main body facing the inside of the battery core, and the receiving groove is used to receive and fix the monitoring module.

5. The battery cell according to claim 2, characterized in that: Also includes: A pole lug, the pole lug passes through the spacer and is electrically connected to the pole; A conductive member, one end of which is electrically connected to the monitoring module, and the other end of which is connected to the pole lug and / or the pole.

6. The battery cell according to claim 5, characterized in that: The other end of the conductive member is welded to the tab, so that the monitoring module is electrically connected to the tab; and / or The other end of the conductive member is welded to the pole, so that the monitoring module is electrically connected to the pole tab via the pole.

7. The battery cell according to claim 5, characterized in that: The pole includes a lead-out plate, the pole is electrically connected to the pole tab via the lead-out plate, and the conductive member is electrically connected to the pole tab via the lead-out plate.

8. The battery cell according to claim 7, characterized in that: The conductive member is welded to the lead-out piece.

9. The battery cell according to claim 1, characterized in that: The spacer is provided with a buckle, and the buckle is engaged with the monitoring module, so as to be used for engaging the monitoring module with the spacer.

10. The battery cell according to claim 1, characterized in that: The monitoring module comprises a packaging body, the packaging body is provided with a buckle structure, and the monitoring module is fixedly connected to the spacer ring through the buckle structure of the packaging body.

11. The battery cell according to claim 1, characterized in that: The spacer is provided with a female buckle, the monitoring module is provided with a male buckle, and the female buckle and the male buckle cooperate with each other; or The spacer is provided with a sub-button, and the monitoring module is provided with a female buckle, and the female buckle cooperates with the sub-button.

12. The battery cell according to any one of claims 1 to 11, characterized in that: The monitoring module includes at least one of a chip, a processor and an integrated circuit.

13. The battery cell according to any one of claims 1 to 11, characterized in that: Also includes: The pole core is arranged on a side of the spacer facing the interior of the battery cell.

14. The battery cell according to claim 13, characterized in that: The cover plate assembly and the spacer are provided on opposite sides of the pole core, and the monitoring module is fixed to the cover plate assembly or the spacer on one side of the pole core.

15. The battery cell according to claim 13, characterized in that: 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 the performance data of the battery core.

16. The battery cell according to any one of claims 1 to 11, characterized in that: There are multiple monitoring modules, and the multiple monitoring modules are simultaneously arranged on the cover plate assembly or the spacer; or A certain number of the monitoring modules are arranged on the cover plate assembly, and a certain number of the monitoring modules are arranged on the spacer.

17. A battery pack, characterized in that: include: The battery cell according to any one of claims 1 to 16; A tray, wherein the battery cell is arranged in the tray.

18. An electrical device, characterized in that: The battery cell comprises the battery cell according to any one of claims 1 to 16 or the battery pack according to claim 17, wherein the battery cell or the battery pack supplies power to the electrical device.

Images