Single cell and battery pack

Abstract

The utility model discloses a single battery and battery pack, single battery includes casing, electrode assembly, top cap subassembly and collection board, and the casing has the accommodation cavity, and electrode assembly is located in the accommodation cavity, and electrode assembly includes main part, first tab and second tab, and first tab is bent and sets up and forms first interlayer space, and collection board is at least partially accommodated in first interlayer space, and collection board and first tab and second tab are all electricity connection. The application is through the first tab bending and forming the first interlayer space, makes collection board at least partially accommodate in it, and is electrically connected with first tab and second tab, saves the independent collection board installation area and a large number of connecting wire harness, makes the battery internal space utilization rate improve significantly, can accommodate more active material, thereby improves the battery energy density, simultaneously, because reduces the additional arrangement wire harness and connector and other components, not only direct reduction material cost, still greatly reduces the assembly process, effectively reduces production cost.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology, and in particular to a single cell battery and a battery pack. Background Technology

[0002] In the field of power battery technology, a Battery Management System (BMS) is used to closely monitor the battery's state, detecting abnormalities such as overcharging during charging and over-discharging during discharging. Traditional battery management systems use wired BMSs. These wired BMSs connect individual battery cells via cables, significantly increasing the complexity of the battery installation process. Furthermore, the cables required by the wired BMS occupy considerable space, which is extremely detrimental to optimizing the internal space of the battery cells and may even limit further improvements in battery energy density.

[0003] For these reasons, wireless BMS has emerged. Wireless BMS, also known as WBMS (Wireless Battery Management System), connects individual battery cells in series through wireless communication technology, eliminating the need for wiring harnesses. This not only improves communication convenience but also significantly reduces the cost of using wiring harnesses.

[0004] In related wireless BMS technologies, whether wired or wireless, the data acquisition board and its supporting connecting components often require separate layout space. For example, there is a dedicated area for placing the data acquisition board, as well as space occupied by the lines connecting the battery cells to the data acquisition board, resulting in low internal space utilization and limiting the flexibility of internal space layout. Utility Model Content

[0005] The main purpose of this utility model is to propose a single battery cell and battery pack, which aims to solve the technical problems of low internal space utilization and low layout flexibility of existing single batteries.

[0006] To achieve the above objectives, this utility model proposes a single-cell battery, comprising:

[0007] A housing having a receiving cavity;

[0008] An electrode assembly is disposed in the receiving cavity. The electrode assembly includes a main body and a first electrode tab and a second electrode tab, both of which are electrically connected to the main body. The first electrode tab is bent and forms a first interlayer space.

[0009] A top cover assembly, the top cover assembly including a top cover sheet, the top cover sheet being connected to the housing and sealing the receiving cavity;

[0010] A data acquisition board, which is at least partially housed in the first interlayer space, and is electrically connected to both the first tab and the second tab.

[0011] In some embodiments, the single battery cell has a first orientation, and the top cover assembly further includes a first terminal that passes through the top cover sheet; the first tab includes a first connecting segment that electrically connects the main body and the first terminal, and at least a portion of the first connecting segment is spaced apart from the main body in the first orientation, such that at least a portion of the first interlayer space is formed between the first connecting segment and the main body.

[0012] In some embodiments, the first tab further includes a second connecting segment and a first bending segment, the second connecting segment being electrically connected to the main body, the first bending segment connecting the second connecting segment and the first connecting segment, and the second connecting segment, the first bending segment, the first connecting segment and the main body forming the first interlayer space.

[0013] In some embodiments, the second electrode tab and the first electrode tab are located on the same side of the main body in the first direction; the second electrode tab is bent to form a second interlayer space, and a portion of the acquisition plate is located in the second interlayer space.

[0014] In some embodiments, the single cell further has a second direction perpendicular to the first direction, and the top cover assembly further includes a second terminal spaced apart from the first terminal in the second direction, the second terminal passing through the top cover sheet, and at least one of the second terminal and the first terminal being insulated from the top cover sheet;

[0015] The second electrode includes a third connecting section, a second bending section, and a fourth connecting section. The third connecting section is electrically connected to the main body. The second bending section connects the third connecting section and the fourth connecting section. The fourth connecting section is electrically connected to the second terminal. The third connecting section, the second bending section, the fourth connecting section, and the main body form the second interlayer space.

[0016] In some embodiments, the single cell further includes a third direction perpendicular to both the first direction and the second direction; two electrode assemblies are provided, and the two electrode assemblies are stacked along the third direction;

[0017] In each of the electrode assemblies, the first connecting segment and the fourth connecting segment both extend along the same side in the third direction;

[0018] In two adjacent electrode assemblies, two first connecting segments extend toward each other along the third direction, two fourth connecting segments extend toward each other along the third direction, and a portion of the acquisition board is located between the two first connecting segments in the third direction, and a portion of the acquisition board is located between the two fourth connecting segments in the third direction.

[0019] In some embodiments, the acquisition plate includes a rigid substrate; or, the acquisition plate is a flexible plate, which is bonded to at least one of the first tab and the second tab.

[0020] In some embodiments, the acquisition board is provided with an insulating layer, the insulating layer being at least located on the side of the acquisition board facing the electrode assembly.

[0021] In some embodiments, the acquisition board is provided with an acquisition module and a wireless communication module. The acquisition module is electrically connected to the first electrode and the second electrode, and the wireless communication module is electrically connected to the acquisition module.

[0022] This utility model also provides a battery pack, including a single battery cell.

[0023] This application forms a first interlayer space by bending the first tab, allowing the data acquisition board to be at least partially housed within it and electrically connected to the first and second tabs. The data acquisition board is arranged using the first interlayer space formed by the first tab, eliminating the need for a separate data acquisition board installation area and a large number of connecting wires. This effectively solves the problems of large space occupation and complex structure in traditional BMS layouts, significantly improving the utilization rate of the battery's internal space and allowing for the accommodation of more active materials, thereby increasing the battery's energy density. At the same time, by reducing the additional arrangement of wires and connectors, not only are material costs directly reduced, but assembly processes are also significantly reduced, effectively lowering production costs. Attached Figure Description

[0024] Figure 1 This is a disassembly diagram of an embodiment of the single-cell battery of this utility model;

[0025] Figure 2 This is a partial structural schematic diagram of an embodiment of the single-cell battery of this utility model;

[0026] Figure 3 This is a partial structural schematic diagram of an embodiment of the single-cell battery of this utility model.

[0027] Explanation of icon numbers:

[0028]

[0029]

[0030] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] The solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0034] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0035] Please refer to Figures 1 to 3 This application provides an embodiment of a single-cell battery 100, including a housing 10, an electrode assembly 20, a top cover assembly 30, and a data acquisition plate 40. The housing 10 has a receiving cavity 11; the electrode assembly 20 is disposed in the receiving cavity 11, and the electrode assembly 20 includes a main body 21 and a first electrode tab 22 and a second electrode tab 23, both electrically connected to the main body 21. The first electrode tab 22 is bent to form a first interlayer space 221; the top cover assembly 30 includes a top cover sheet 31, which is connected to the housing 10 and seals the receiving cavity 11; the data acquisition plate 40 is at least partially housed in the first interlayer space 221, and the data acquisition plate 40 is electrically connected to both the first electrode tab 22 and the second electrode tab 23.

[0036] The casing 10 serves as the basic frame of the single cell 100, forming a cavity 11 for loading core components such as the electrode assembly 20 and the top cover assembly 30. It has mechanical protection and sealing functions to prevent electrolyte leakage and external impurities from entering, creating a stable working environment inside the single cell 100.

[0037] The main body 21 is composed of positive electrode plates, negative electrode plates, diaphragms, etc., and is the core unit for realizing the storage and release of electrical energy; the first electrode 22 has both electrical connection and structural support functions, and forms the first interlayer space 221 by bending; the second electrode 23 serves as the other end electrical connection point, and is connected to the acquisition board 40 to realize data transmission.

[0038] The top cover 31 is sealed to the housing 10 to complete the sealing of the cavity 11. It also integrates external connection terminals to realize the electrical conduction between the single battery 100 and the external circuit. Some top covers 31 are also equipped with safety devices such as explosion-proof valves to ensure the safety of the single battery 100.

[0039] The acquisition board 40 integrates sensors for voltage, temperature, etc., to collect real-time status data of the individual battery 100. Through electrical connection with the first tab 22 and the second tab 23, the data is transmitted to the battery management system, providing a data foundation for the charge and discharge management and fault warning of the individual battery 100.

[0040] In this embodiment, the acquisition board 40 is embedded in the first interlayer space 221 formed by bending the first tab 22, avoiding the space occupied by the independent layout of the traditional acquisition board, and saving the space of the wiring harness. This effectively improves the internal space utilization of the single cell 100 and creates conditions for improving the energy density of the single cell 100. In addition, by reducing the additional wiring harness and connectors, not only is the material cost directly reduced, but the assembly process is also greatly reduced, effectively reducing the production cost.

[0041] Furthermore, at least a portion of the acquisition board 40 is located within the first interlayer space 221 formed by bending the first tab 22, which facilitates direct connection of the acquisition board 40 to the first tab 22, shortens the signal transmission path, reduces contact impedance, and improves the accuracy and real-time performance of data acquisition; the design without exposed wiring harnesses enhances the electromagnetic compatibility of the single cell 100 and improves overall reliability.

[0042] In some embodiments, the single battery cell 100 has a first direction Z, and the top cover assembly 30 further includes a first terminal 32, which is disposed through the top cover sheet 31; the first tab 22 includes a first connecting segment 222, which is electrically connected to the main body portion 21 and the first terminal 32, and at least a portion of the first connecting segment 222 is spaced apart from the main body portion 21 in the first direction Z, so that at least a portion of the first interlayer space 221 is formed between the first connecting segment 222 and the main body portion 21.

[0043] The first terminal 32 is inserted through the top cover plate 31 and serves as an electrical connection component between the single cell 100 and the external circuit. It conducts the current of the first tab 22 to the outside and provides a stable voltage monitoring node for the acquisition board 40, ensuring the accuracy of the acquisition of the status data of the single cell 100.

[0044] The first connecting section 222, as an important component of the first electrode 22, on the one hand, connects to the first terminal 32 to realize the external transmission of electrical energy inside the single cell 100; on the other hand, by being spaced apart from the main body 21 in the first direction Z, it constructs the first interlayer space 221 to provide an installation carrier for the acquisition board 40, thus having the dual functions of electrical connection and structural support.

[0045] In this embodiment, the direct connection between the first connecting segment 222 and the first terminal 32 shortens the current transmission path, reduces the connection impedance, and improves the charging and discharging efficiency of the single battery 100. Moreover, based on the spatial spacing design in the first direction Z, the first interlayer space 221 is precisely defined, making the installation of the acquisition board 40 more standardized, facilitating automated assembly, reducing human error, and improving production efficiency.

[0046] Please continue to refer to this. Figure 2 The first tab 22 also includes a second connecting section 223 and a first bending section 224. The second connecting section 223 is electrically connected to the main body 21. The first bending section 224 connects the second connecting section 223 and the first connecting section 222. The second connecting section 223, the first bending section 224, the first connecting section 222 and the main body 21 form a first interlayer space 221.

[0047] The second connecting segment 223 serves as a bridge connecting the first tab 22 and the main body 21 of the electrode assembly 20, conducting the current generated by the main body 21 and providing a basic support point for the formation of the first interlayer space 221. The first bending segment 224 changes the transmission path of current and signal in the first direction Z by bending at an angle. At the same time, the spatial misalignment formed by the bending, together with other parts, defines the shape and size of the first interlayer space 221, providing structural protection for the installation of the acquisition board 40. One end of the first connecting segment 222 is connected to the second connecting segment 223 through the first bending segment 224, and the other end is electrically connected to the first terminal 32 passing through the top cover plate 31, realizing the efficient transmission of electrical energy inside the battery to the external circuit. At the same time, as one of the boundaries of the first interlayer space 221, it, together with other structures, defines the installation position of the acquisition board 40.

[0048] Optionally, the first connecting segment 222 and the second connecting segment 223 extend in opposite directions, so that the second connecting segment 223, the first bent segment 224, the first connecting segment 222, and the main body 21 form a first interlayer space 221. Figure 2 From the perspective shown, the second connecting segment 223 extends generally to the left, the first connecting segment 222 extends generally to the right, and the first bent segment 224 connects the first connecting segment 222 and the second connecting segment 223, forming a first interlayer space 221 with an opening generally to the right. Figure 2 As shown, when there are two electrode assemblies 20, the openings of the two first interlayer spaces 221 are arranged facing each other, which can make maximum use of the upper space of the main body 21 and reserve enough installation space for the acquisition board 40.

[0049] In this embodiment, the three-segment structure design of the first tab 22 in the single cell 100 makes the size and shape of the first interlayer space 221 easier to control, facilitating the standardized design and automated assembly of the acquisition board 40, and significantly reducing assembly errors and production difficulty. Moreover, by constructing the first interlayer space 221 through the structural changes of the first tab 22 itself, no additional components or complex processes are required. Without increasing the volume of the single cell 100, the acquisition board 40 can be embedded, further freeing up the internal space of the single cell 100 and creating conditions for improving energy density.

[0050] In some embodiments, the second electrode 23 and the first electrode 22 are located on the same side of the main body 21 in the first direction Z; the second electrode 23 is bent to form a second interlayer space 231, and a portion of the acquisition plate 40 is located in the second interlayer space 231.

[0051] The second tab 23 serves as another electrical connection terminal of the electrode assembly 20, working in conjunction with the first tab 22 to achieve power output; by bending, a second interlayer space 231 is formed, providing an additional installation area for the acquisition board 40, and at the same time serving as a node for the acquisition board 40 to acquire battery status signals, ensuring the integrity of data acquisition.

[0052] The second interlayer space 231 is a structural area formed by bending the second electrode 23. Together with the first interlayer space 221, it constitutes the three-dimensional mounting position of the acquisition plate 40, which precisely limits the installation angle and position of the acquisition plate 40 and improves the assembly stability.

[0053] The acquisition board 40 is located in the first layer space and the second interlayer space 231. Through multi-point contact with the first electrode 22 and the second electrode 23, it synchronously acquires parameters such as voltage and temperature of the first electrode 22 and the second electrode 23. At the same time, the symmetrical interlayer space is used to achieve structural fixation, avoiding the risk of loosening caused by traditional wire harness fixing methods.

[0054] Compared to the single-sided sandwich design, the double-sandwich space design in this embodiment uses a symmetrical three-dimensional clamping structure, that is, the first electrode 22 and the second electrode 23 are bent on the same side of the main body 21 to form a symmetrical double sandwich, which mechanically limits the acquisition plate 40 from two directions, effectively constrains its displacement in three-dimensional space, and improves the connection stability of the acquisition plate 40.

[0055] Please refer to Figure 1 and Figure 3 In some embodiments, the single cell 100 also has a second direction X perpendicular to the first direction Z, and the top cover assembly 30 further includes a second terminal 33 spaced apart from the first terminal 32 in the second direction X. The second terminal 33 passes through the top cover sheet 31, and at least one of the second terminal 33 and the first terminal 32 is insulated from the top cover sheet 31.

[0056] The second tab 23 includes a third connecting section 232, a second bending section 233, and a fourth connecting section 234. The third connecting section 232 is electrically connected to the main body 21. The second bending section 233 connects the third connecting section 232 and the fourth connecting section 234. The fourth connecting section 234 is electrically connected to the second terminal 33. The third connecting section 232, the second bending section 233, the fourth connecting section 234, and the main body 21 form a second interlayer space 231.

[0057] The second terminal 33 is inserted through the top cover plate 31 and arranged at a distance from the first terminal 32 in the first direction Z. It serves as an external electrical interface for the other polarity of the battery and is electrically connected to the fourth connection section 234 of the second electrode 23 to realize the output and input of electrical energy. At least one of the second terminal 33 and the first terminal 32 is insulated from the top cover plate 31 to prevent polarity conduction from causing safety hazards.

[0058] The third connecting segment 232 serves as the connection between the second electrode 23 and the main body 21, undertaking the function of current conduction and providing structural support for the formation of the second interlayer space 231. The second bending segment 233, through angular bending, changes the current path in the second direction X, defines the geometry of the second interlayer space 231, and together with other parts, forms a mechanical limit for the acquisition board 40. The fourth connecting segment 234 connects the second bending segment 233 and the second terminal 33, transmitting the current from the main body 21 to the external circuit, and also serves as one of the boundaries of the second interlayer space 231, ensuring the stable installation and electrical connection of the acquisition board 40.

[0059] In this embodiment, a first interlayer space 221 and a second interlayer space 231, formed by the first electrode 22 and the second electrode 23 respectively, are constructed in the vertical first direction Z and second direction X, respectively, so that the acquisition board 40 can be embedded and connected to the corresponding terminals. The three-segment structure of the second electrode 23 (the third connecting segment 232, the second bending segment 233, and the fourth connecting segment 234) forms a regular second interlayer space 231 with the main body 21 in the second direction X, which together with the first interlayer space 221 in the first direction Z constitutes a three-dimensional layout. At the same time, through the insulation design of at least one of the second terminal 33 and the first terminal 32, the positive and negative terminals are electrically isolated to avoid the risk of short circuit and achieve synergistic optimization of electrical safety and space utilization.

[0060] Optionally, the acquisition board 40 can be directly welded to the first connecting section 222 of the first electrode 22, and the acquisition board can be directly welded to the fourth connecting section 234 of the second electrode 23 to form a circuit. On the one hand, the acquisition board 40 is powered by the first electrode 22 and the second electrode 23, and on the other hand, it can acquire and process the required current, voltage and other related information.

[0061] In some embodiments, the single cell 100 further includes a third direction Y perpendicular to both the first direction Z and the second direction X; two electrode assemblies 20 are provided, and the two electrode assemblies 20 are stacked along the third direction Y; wherein:

[0062] Combination Figures 1 to 3 As shown, in each electrode assembly 20, the first connecting segment 222 and the fourth connecting segment 234 both extend along the same side of the third direction Y.

[0063] like Figure 2 As shown, in two adjacent electrode assemblies 20, two first connecting segments 222 extend along the third direction Y towards each other, as... Figure 3 As shown, the two fourth connecting segments 234 extend towards each other along the third direction Y, and a portion of the acquisition board 40 is located between the two first connecting segments 222 in the third direction Y, and a portion of the acquisition board 40 is located between the two fourth connecting segments 234 in the third direction Y.

[0064] In this structure, two electrode assemblies 20 are stacked along the third direction Y to form a dual-cell stacked structure, which can improve the battery capacity or voltage level through parallel or series connection. The first connection segment 222 and the fourth connection segment 234 of each electrode assembly 20 extend to the same side of the third direction Y, providing a physical interface for cross-layer connection.

[0065] like Figure 2 and Figure 3As shown, two first connecting segments 222 extend along the third direction Y towards each other to form a first clamping space; similarly, two fourth connecting segments 234 extend along the third direction Y towards each other to form a second clamping space; the lateral extension portion of the acquisition board 40 is embedded in the first clamping space and the second clamping space respectively, and through the three-dimensional contact in the third direction Y, the voltage, temperature and other parameters of the two-layer electrode assembly 20 are collected simultaneously without the need for additional wire harness cross-layer connection, avoiding the space waste and assembly complexity caused by wire harness interlacing in the stacked structure.

[0066] It is understandable that for the two electrode components 20 of a single cell, both first connecting segments 222 are electrically connected to the first terminal 32, which can be welded; while both fourth connecting segments 234 are electrically connected to the second terminal 33, which can also be welded.

[0067] In some embodiments, the acquisition plate 40 includes a rigid substrate; or, the acquisition plate 40 is a flexible plate, which is bonded to at least one of the first tab 22 and the second tab 23.

[0068] The rigid substrate serves as the circuit carrier, integrating the signal acquisition module and communication chip. Utilizing the structural strength of the rigid material, a stable mechanical and electrical connection is formed within the interlayer space through mechanical fixing and welding processes. It also provides mechanical support for the acquisition board 40, ensuring the positional accuracy when the multilayer electrode assembly 20 is stacked.

[0069] Flexible panels can utilize the bendability of flexible materials to bond to the curved surfaces of tabs through bonding or hot pressing processes, adapting to complex spatial layouts or dynamic stress scenarios and reducing connection failures caused by deformation.

[0070] This embodiment provides a suitable structural configuration for different types of single cells 100 (such as blade batteries and cylindrical batteries) without increasing the volume of the single cell 100 by flexibly selecting the material and shape of the acquisition board 40.

[0071] In some embodiments, the acquisition plate 40 is provided with an insulating layer, which is provided at least on the side of the acquisition plate 40 facing the electrode assembly 20.

[0072] In this embodiment, the acquisition board 40, through the provision of an insulating layer, ensures the reliability of the electrical connection while providing insulation protection for the electrode assembly 20. The insulating layer at least covers the side of the acquisition board 40 facing the electrode assembly 20. Utilizing the dielectric properties of the insulating material, it isolates the circuitry of the acquisition board 40 from the main body 21 of the electrode assembly 20, preventing the risk of short circuits caused by physical contact or electrolyte penetration.

[0073] In some embodiments, the acquisition board 40 is provided with an acquisition module and a wireless communication module. The acquisition module is electrically connected to the first tab 22 and the second tab 23, and the wireless communication module is electrically connected to the acquisition module.

[0074] In this implementation, the acquisition board 40 achieves real-time monitoring and intelligent management of the status of the individual battery 100 through modular functional integration and wireless data transmission. Specifically, the acquisition module is directly electrically connected to the first tab 22 and the second tab 23, converting analog signals such as current, voltage, and temperature collected from the tabs into digital signals; the wireless communication module receives the data from the acquisition module and transmits it wirelessly to the battery management system via wireless communication technologies (such as Bluetooth and ZigBee), thereby eliminating traditional wiring harness connections and reducing the internal wiring of the individual battery 100.

[0075] Optionally, the acquisition module and the wireless communication module can be located on a rigid substrate or a flexible substrate, so that the acquisition board 40 is a rigid board or a flexible board.

[0076] This application also provides a battery pack, including the single cell 100 as described above. Since the battery pack adopts all the technical solutions of all embodiments of the single cell 100 described above, the battery pack of this utility model also possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0077] The above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is impossible to exhaustively list all possible implementations here. All obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A single-cell battery, characterized in that, include: A housing having a receiving cavity; An electrode assembly is disposed in the receiving cavity. The electrode assembly includes a main body and a first electrode tab and a second electrode tab, both of which are electrically connected to the main body. The first electrode tab is bent and forms a first interlayer space. A top cover assembly, the top cover assembly including a top cover sheet, the top cover sheet being connected to the housing and sealing the receiving cavity; A data acquisition board, which is at least partially housed in the first interlayer space, and is electrically connected to both the first tab and the second tab.

2. The single-cell battery according to claim 1, characterized in that, The single battery cell has a first orientation, and the top cover assembly further includes a first terminal, which is disposed through the top cover sheet; the first tab includes a first connecting segment, which is electrically connected to the main body and the first terminal, and at least a portion of the first connecting segment is spaced apart from the main body in the first orientation, so that at least a portion of the first interlayer space is formed between the first connecting segment and the main body.

3. The single-cell battery according to claim 2, characterized in that, The first tab further includes a second connecting segment and a first bending segment. The second connecting segment is electrically connected to the main body. The first bending segment connects the second connecting segment and the first connecting segment. The second connecting segment, the first bending segment, the first connecting segment, and the main body form the first interlayer space.

4. The single-cell battery according to claim 3, characterized in that, The second electrode and the first electrode are located on the same side of the main body in the first direction; the second electrode is bent to form a second interlayer space, and a portion of the acquisition plate is located in the second interlayer space.

5. The single-cell battery according to claim 4, characterized in that, The single cell also has a second direction perpendicular to the first direction, and the top cover assembly further includes a second terminal spaced apart from the first terminal in the second direction. The second terminal passes through the top cover sheet, and at least one of the second terminal and the first terminal is insulated from the top cover sheet. The second electrode includes a third connecting section, a second bending section, and a fourth connecting section. The third connecting section is electrically connected to the main body. The second bending section connects the third connecting section and the fourth connecting section. The fourth connecting section is electrically connected to the second terminal. The third connecting section, the second bending section, the fourth connecting section, and the main body form the second interlayer space.

6. The single-cell battery according to claim 5, characterized in that, The single cell also includes a third direction perpendicular to both the first direction and the second direction; the electrode assembly is provided in two, and the two electrode assemblies are stacked along the third direction. In each of the electrode assemblies, the first connecting segment and the fourth connecting segment both extend along the same side in the third direction; In two adjacent electrode assemblies, two first connecting segments extend toward each other along the third direction, two fourth connecting segments extend toward each other along the third direction, and a portion of the acquisition board is located between the two first connecting segments in the third direction, and a portion of the acquisition board is located between the two fourth connecting segments in the third direction.

7. The single-cell battery according to claim 4, characterized in that, The acquisition plate includes a rigid substrate; or, the acquisition plate is a flexible plate, and the flexible plate is bonded to at least one of the first electrode tab and the second electrode tab.

8. The single-cell battery according to any one of claims 1-7, characterized in that, The acquisition board is provided with an insulating layer, and the insulating layer is provided at least on the side of the acquisition board facing the electrode assembly.

9. The single-cell battery according to any one of claims 1 to 7, characterized in that, The acquisition board is equipped with an acquisition module and a wireless communication module. The acquisition module is electrically connected to the first electrode and the second electrode, and the wireless communication module is electrically connected to the acquisition module.

10. A battery pack, characterized in that, Including the single cell battery as described in any one of claims 1-9.

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