Battery cell assembly, battery and battery module

Abstract

The utility model provides a battery cell assembly, a battery and a battery module. The battery cell assembly comprises: a main body structure, which comprises a pole piece and a tab arranged on the pole piece; the temperature detection device is arranged on the main body structure and is used for detecting the temperature of the main body structure, and at least part of the temperature detection device is in contact with the pole piece and / or the pole lug; and one end of the transmission structure is electrically connected with the temperature detection device, and the other end of the transmission structure is used for being electrically connected with the control module so as to transmit detection information of the temperature detection device to the control module. According to the battery module, the problem that the operation safety of the battery module in the prior art is relatively low is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and more specifically, to a cell assembly, a battery, and a battery module. Background Technology

[0002] Currently, as the consumer electronics market continues to demand higher comprehensive performance from its products, consumers' needs for battery products are also increasing. In addition to conventional electrical performance, consumers are paying more attention to battery safety, especially thermal runaway. Once a battery experiences thermal runaway or spontaneous combustion, it will inevitably cause economic losses to consumers, and even personal safety risks.

[0003] In existing technologies, a PCB board is added to the battery electrode, and a temperature sensor is installed on the PCB board. The temperature sensor works in conjunction with the PCB board to achieve real-time monitoring of the internal temperature of the battery. This allows for timely safety measures such as power-off when the internal temperature of the battery rises, thus preventing thermal runaway.

[0004] However, temperature sensors mounted on the PCB board indirectly reflect the battery electrode temperature by detecting the PCB board's temperature. On one hand, the PCB board actually hinders heat transfer, meaning the temperature detected by the sensor may be lower than the actual temperature of the battery electrode. On the other hand, the sensor's readings are also easily affected by the PCB board's own temperature; if the PCB board generates significant heat, the sensor may detect a temperature higher than the actual temperature of the battery electrode. Therefore, existing temperature sensors cannot accurately detect the actual temperature of the battery electrode, seriously affecting battery operational safety. Utility Model Content

[0005] Instruction manual PN281881HZYWLN

[0006] The main objective of this invention is to provide a cell assembly, a battery, and a battery module to address the problem of low operational safety in existing battery modules.

[0007] To achieve the above objectives, according to one aspect of the present invention, a battery cell assembly is provided, comprising: a main structure including an electrode and a tab disposed on the electrode; a temperature detection device disposed on the main structure and used to detect the temperature of the main structure, wherein at least a portion of the temperature detection device is in contact with the electrode and / or the tab; and a transmission structure, one end of which is electrically connected to the temperature detection device, and the other end of which is used to be electrically connected to a control module to transmit the detection information of the temperature detection device to the control module.

[0008] Furthermore, the battery cell assembly also includes: a flexible cover having a receiving cavity and a through hole communicating with the receiving cavity, an electrode being disposed in the receiving cavity, and an end of the electrode tab away from the electrode extending out of the receiving cavity through the through hole.

[0009] Furthermore, the temperature detection device is disposed on the electrode, and at least part of the temperature detection device is in contact with the electrode; wherein, the flexible covering also has a through hole communicating with the receiving cavity, one end of the transmission structure for electrical connection with the temperature detection device is located inside the receiving cavity, and the other end of the transmission structure for electrical connection with the control module extends out of the receiving cavity through the through hole.

[0010] Furthermore, the temperature detection device is disposed on the tab, at least part of which is in contact with the tab, and the transmission structure is located outside the receiving cavity.

[0011] Furthermore, the transmission structure includes a first transmission section and a second transmission section that are electrically connected to each other. The end of the first transmission section away from the second transmission section is electrically connected to a temperature detection device, and the end of the second transmission section away from the first transmission section is electrically connected to a control module. The first transmission section is a linear structure or a plate structure, and the second transmission section is a linear structure or a plate structure.

[0012] Furthermore, the first transmission unit is one of a wire and a flexible circuit board, and the second transmission unit is one of a wire and a flexible circuit board.

[0013] Instruction manual PN281881HZYWLN

[0014] Furthermore, when one of the first transmission section and the second transmission section is a wire and the other of the first transmission section and the second transmission section is a flexible circuit board, the transmission structure further includes: a connecting section disposed between the first transmission section and the second transmission section, with both ends of the connecting section electrically connected to the first transmission section and the second transmission section respectively.

[0015] Furthermore, the transmission structure also includes a terminal disposed on the end of the second transmission unit away from the first transmission unit, and the second transmission unit is electrically connected to the control module through the terminal.

[0016] According to another aspect of the present invention, a battery is provided, the battery including a cell assembly and a control module, the cell assembly being electrically connected to the control module through its transmission structure, and the cell assembly being the aforementioned cell assembly.

[0017] According to another aspect of the present invention, a battery module is provided, the battery module including the battery described above.

[0018] Applying the technical solution of this application, the main structure of the battery cell assembly includes electrode sheets and tabs disposed on the electrode sheets. A temperature detection device is disposed on the main structure and used to detect the temperature of the main structure. At least a portion of the temperature detection device is in contact with the electrode sheets and / or tabs. One end of the transmission structure is electrically connected to the temperature detection device, and the other end of the transmission structure is used to electrically connect to the control module to transmit the detection information of the temperature detection device to the control module. Thus, during the actual operation of the battery cell assembly, the detection value of the temperature detection device in contact with the electrode sheets or tabs can be closer to the actual temperature value of the main structure. Compared with the prior art method of indirectly reflecting the temperature of the electrode sheets or tabs by detecting the temperature value of the PCB board, the temperature detection device in this application has higher temperature detection accuracy, thereby better avoiding the occurrence of battery thermal runaway and solving the problem of low operational safety of battery modules in the prior art. Simultaneously, the transmission structure electrically connected to the temperature detection device enables the data transmission of the detection information of the temperature detection device, thereby ensuring that the temperature monitoring function can be implemented normally. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic diagram of the internal structure of a battery cell assembly according to a first embodiment of the present invention is shown;

[0021] Figure 2 A schematic diagram of the internal structure of a second embodiment of the battery cell assembly according to the present invention is shown;

[0022] Figure 3 A schematic diagram of the internal structure of a battery cell assembly according to a third embodiment of the present invention is shown;

[0023] Figure 4 It shows Figure 1 A cross-sectional view of the battery cell assembly at point AA;

[0024] Figure 5 A partially enlarged schematic diagram of Embodiment 4 of the battery cell assembly according to the present invention is shown;

[0025] Figure 6 A partially enlarged schematic diagram of Embodiment 5 of the battery cell assembly according to the present invention is shown;

[0026] Figure 7 It shows Figure 1 Enlarged schematic diagram of point B in the battery cell assembly;

[0027] Figure 8 A partially enlarged schematic diagram of embodiment six of the battery cell assembly according to the present invention is shown.

[0028] The above figures include the following reference numerals:

[0029] 10. Main structure; 11. Electrode; 12. Electrode tab; 121. Positive electrode tab; 122. Negative electrode tab; 20. Temperature detection device; 30. Transmission structure; 31. First transmission section; 32. Second transmission section; 33. Adapter section; 40. Flexible covering; 41. Through hole; 42. Through hole.

[0030] Instruction manual PN281881HZYWLN Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0034] Instruction manual PN281881HZYWLN

[0035] To address the issue of low operational safety in existing battery modules, this application provides a cell assembly, a battery, and a battery module.

[0036] Example 1

[0037] like Figure 1 As shown, the battery cell assembly includes a main structure 10, a temperature detection device 20, and a transmission structure 30. The main structure 10 includes an electrode 11 and a tab 12 disposed on the electrode 11. The temperature detection device 20 is disposed on the main structure 10 and is used to detect the temperature of the main structure 10. At least a portion of the temperature detection device 20 is in contact with the electrode 11 and / or the tab 12. One end of the transmission structure 30 is electrically connected to the temperature detection device 20, and the other end of the transmission structure 30 is used to be electrically connected to a control module to transmit the detection information of the temperature detection device 20 to the control module.

[0038] Applying the technical solution of this embodiment, the main structure 10 of the battery cell assembly includes an electrode 11 and a tab 12 disposed on the electrode 11. A temperature detection device 20 is disposed on the main structure 10 and is used to detect the temperature of the main structure 10. At least a portion of the temperature detection device 20 is in contact with the electrode 11 and / or the tab 12. One end of the transmission structure 30 is electrically connected to the temperature detection device 20, and the other end of the transmission structure 30 is used to be electrically connected to the control module to transmit the detection information of the temperature detection device 20 to the control module. In this way, during the actual operation of the battery cell assembly, the detection value of the temperature detection device 20 in contact with the electrode 11 or the tab 12 can be closer to the actual temperature value of the main structure 10. Compared with the prior art method of indirectly reflecting the temperature of the electrode 11 or the tab 12 by detecting the temperature value of the PCB board, the temperature detection device 20 in this embodiment has higher temperature detection accuracy, thereby better avoiding the occurrence of battery thermal runaway and solving the problem of low operational safety of battery modules in the prior art. Meanwhile, the transmission structure 30, which is electrically connected to the temperature detection device 20, can realize the data transmission of the detection information of the temperature detection device 20, thereby ensuring that the temperature monitoring function can be realized normally.

[0039] Instruction manual PN281881HZYWLN

[0040] Specifically, this embodiment actually eliminates the PCB board inside the battery cell assembly and adds a transmission structure 30 so that the temperature detection device 20 can be electrically connected to the control module in the battery module or the control module in the electrical equipment through the transmission structure 30, so as to realize the temperature monitoring function of the temperature detection device 20.

[0041] Specifically, eliminating the PCB board reduces the manufacturing cost of the battery cell assembly (i.e., the battery cell assembly in this embodiment does not require a separate pack, thus reducing the production steps, labor costs, and time costs) and improving the economic efficiency of the battery cell assembly. On the other hand, it also reduces the internal resistance of the battery cell assembly and improves its electrical performance (in battery cell performance testing, the overall internal resistance of the battery cell assembly in this embodiment can be reduced by about 20mΩ compared to the battery cell assembly with an additional PCB board inside).

[0042] like Figure 1 As shown, the battery cell assembly also includes a flexible sheath 40, which has a receiving cavity and a through hole 41 communicating with the receiving cavity. The electrode 11 is disposed in the receiving cavity, and the end of the tab 12 away from the electrode 11 extends out of the receiving cavity through the through hole 41. In this way, the flexible sheath 40 can protect the electrode 11 while isolating it from the outside environment to prevent impurities from entering the receiving cavity, thereby extending the service life of the battery cell assembly. At the same time, the above configuration effectively makes the battery cell assembly a soft-pack design, eliminating the need for mold making during its processing (eliminating the need to manufacture corresponding molds for rigid shells), thereby reducing the processing cost and overall weight of the battery cell assembly and achieving a lightweight design.

[0043] like Figure 1 As shown, the temperature detection device 20 is disposed on the electrode 11, and at least a portion of the temperature detection device 20 is in contact with the electrode 11. The flexible covering 40 also has a through-hole 42 communicating with the receiving cavity. One end of the transmission structure 30 for electrical connection with the temperature detection device 20 is located inside the receiving cavity, and the other end of the transmission structure 30 for electrical connection with the control module extends out of the receiving cavity through the through-hole 42. Thus, when the temperature detection device 20 is disposed on the electrode 11, the transmission structure 30 can extend out of the receiving cavity through the through-hole 42 to be electrically connected to the control module (PN281881HZYWLN) in the manual, allowing the temperature detection device 20 located inside the receiving cavity to still be electrically connected to the control module located outside the receiving cavity via the transmission structure 30.

[0044] like Figure 4As shown, the transmission structure 30 includes a first transmission section 31 and a second transmission section 32 that are electrically connected to each other. The end of the first transmission section 31 away from the second transmission section 32 is electrically connected to the temperature detection device 20, and the end of the second transmission section 32 away from the first transmission section 31 is electrically connected to the control module. The first transmission section 31 and the second transmission section 32 are both linear or plate-like structures. This arrangement makes the structures of the first transmission section 31 and the second transmission section 32 more flexible and diverse, allowing operators to select the appropriate structure for the first transmission section 31 and the second transmission section 32 based on the specifications and models of the temperature detection device 20 and the external control module. This not only increases the processing flexibility of the operators but also improves the versatility of the battery cell assembly.

[0045] Optionally, the first transmission section 31 is one of a wire and a flexible circuit board, and the second transmission section 32 is one of a wire and a flexible circuit board. This makes the flexible circuit board thinner, lighter, more flexible, and possesses excellent bending performance, further achieving a lightweight design for the battery cell assembly while increasing the deformability of the transmission structure 30, thereby expanding the connection range of the transmission structure 30 and further improving its versatility. Simultaneously, the wires can reduce the production cost of the transmission structure 30, thus improving the economics of the battery cell assembly.

[0046] Specifically, staff can adjust the structure of the first transmission unit 31 and the second transmission unit 32 according to actual usage needs.

[0047] Optionally, when one of the first transmission section 31 and the second transmission section 32 is a wire, and the other of the first transmission section 31 and the second transmission section 32 is a flexible circuit board, the transmission structure 30 further includes a connecting section 33. The connecting section 33 is disposed between the first transmission section 31 and the second transmission section 32, and its two ends are respectively electrically connected to the first transmission section 31 and the second transmission section 32. In this way, the above arrangement realizes the electrical connection between the flexible circuit board and the wire through the connecting section 33, ensuring stable data transmission between the first transmission section 31 and the second transmission section 32, and further improving the data transmission reliability of the transmission structure 30.

[0048] like Figure 7 As shown, in this embodiment, the first transmission unit 31 is a wire, and the second transmission unit 32 is a flexible circuit board.

[0049] In this embodiment, the adapter 33 is actually an adapter.

[0050] Specifically, the transmission structure 30 also includes terminals, which are disposed on the end of the second transmission section 32 away from the first transmission section 31. The second transmission section 32 is electrically connected to the control module through the terminals. In this way, the above-mentioned arrangement realizes the electrical connection between the transmission structure 30 and the control module through the terminals, ensuring the reliability of data transmission of the transmission structure 30.

[0051] Specifically, the flexible covering 40 is an aluminum-plastic film. Compared to other composite films, the aluminum-plastic film possesses superior barrier properties (blocking moisture and dust), insulation properties, and puncture resistance. These properties further enhance the electrical performance of the battery cell assembly and extend its service life. Simultaneously, in the event of thermal runaway in the battery cell assembly, the aluminum-plastic film can prevent heat transfer, thus avoiding overheating damage or even combustion of other components within the battery module, further improving the operational safety of the battery module.

[0052] In this embodiment, the temperature detection device 20 is an NTC temperature sensor.

[0053] Specifically, the temperature detection device 20 is attached to the main structure 10. In this way, the above-mentioned arrangement improves the contact reliability between the temperature detection device 20 and the main structure 10, enhances the detection accuracy of the temperature detection device 20, ensures high operational safety of the battery cell assembly, and also makes the temperature detection device 20 less likely to fall off, further extending the service life of the battery cell assembly.

[0054] Instruction manual PN281881HZYWLN

[0055] This application also provides a battery, which includes a cell assembly and a control module. The cell assembly is electrically connected to the control module through its transmission structure 30. The cell assembly is the aforementioned cell assembly.

[0056] This application also provides a battery module, which includes the battery described above.

[0057] Example 2

[0058] The difference between the battery cell assembly in Example 2 and Example 1 is that the temperature detection device 20 is located in a different position.

[0059] like Figure 2 As shown, a temperature detection device 20 is disposed on the tab 12, with at least a portion of the temperature detection device 20 in contact with the tab 12, and the transmission structure 30 is located outside the receiving cavity. This arrangement allows the temperature detection device 20 to directly detect the temperature value of the tab 12 to reflect the temperature value of the electrode 11, thereby improving the detection accuracy of the temperature detection device 20 and thus enhancing the operational safety of the battery cell assembly.

[0060] In this embodiment, the tab 12 includes a positive tab 121 and a negative tab 122.

[0061] like Figure 2 As shown, the temperature detection device 20 is mounted on the negative electrode tab 122, and the transmission structure 30 is located outside the receiving cavity.

[0062] Specifically, considering the high heat transfer efficiency between the electrode 11 and the tab 12, the method by which the temperature detection device 20 directly detects the temperature of the tab 12 to reflect the temperature of the electrode 11 does not significantly affect the detection accuracy of the temperature detection device 20. Simultaneously, this arrangement allows the temperature detection device 20 to be entirely located outside the housing cavity, meaning there is no need to create a through hole 42 on the flexible covering 40. This improves the sealing reliability of the housing cavity and further extends the service life of the battery cell assembly.

[0063] Instruction Manual PN281881HZYWLN Example 3

[0064] The difference between the battery cell assembly in Example 3 and Example 2 is that the temperature detection device 20 is located in a different position.

[0065] like Figure 3 As shown, the temperature detection device 20 is mounted on the positive electrode tab 121, and the transmission structure 30 is located outside the receiving cavity. This arrangement allows for more flexible and diverse placement of the temperature detection device 20 to adapt to different operating conditions and usage requirements.

[0066] Example 4

[0067] The difference between the battery cell assembly in Embodiment 4 and Embodiment 1 is that the structure of the transmission structure 30 is different.

[0068] like Figure 5 As shown, both the first transmission section 31 and the second transmission section 32 are flexible circuit boards, meaning the entire transmission structure 30 is a flexible circuit board. This arrangement makes the structures of the first transmission section 31 and the second transmission section 32 more flexible and versatile, adapting to different working conditions and usage requirements, and also improving the processing flexibility of the workers.

[0069] Example 5

[0070] The difference between the battery cell assembly in Implementation 5 and Implementation 1 is that the structure of the transmission structure 30 is different.

[0071] like Figure 6 As shown, both the first transmission section 31 and the second transmission section 32 are conductive wires, meaning the entire transmission structure 30 is a conductive wire structure. This arrangement helps to further reduce the processing cost of the battery cell assembly and also makes the structures of the first transmission section 31 and the second transmission section 32 more flexible and diverse, adapting to different operating conditions and usage requirements.

[0072] Example 6

[0073] The difference between the battery cell assembly in Implementation 6 and Implementation 1 is that the structure of the transmission structure 30 is different.

[0074] like Figure 8 As shown, the first transmission section 31 is a flexible circuit board, and the second transmission section 32 is a wire. This arrangement makes the structures of the first transmission section 31 and the second transmission section 32 more flexible and versatile, adapting to different working conditions and usage requirements, and also improving the processing flexibility of the workers.

[0075] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0076] The main structure of the battery cell assembly includes electrodes and tabs mounted on the electrodes. A temperature detection device is mounted on the main structure and used to detect the temperature of the main structure. At least part of the temperature detection device is in contact with the electrodes and / or tabs. One end of a transmission structure is electrically connected to the temperature detection device, and the other end of the transmission structure is electrically connected to a control module to transmit the detection information from the temperature detection device to the control module. Thus, during the actual operation of the battery cell assembly, the detection value of the temperature detection device in contact with the electrodes or tabs can be closer to the actual temperature value of the main structure. Compared with the prior art method of indirectly reflecting the temperature of the electrodes or tabs by detecting the temperature of the PCB board, the temperature detection device in this application has higher temperature detection accuracy, thereby better avoiding the occurrence of battery thermal runaway and solving the problem of low operational safety of battery modules in the prior art. Simultaneously, the transmission structure electrically connected to the temperature detection device enables the data transmission of the detection information, thereby ensuring that the temperature monitoring function can be implemented normally.

[0077] In the description of this utility model, it should be understood that directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship of the specification PN281881HZYWLN, which are generally based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0078] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0079] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0080] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery cell assembly, characterized in that, include: The main structure (10) includes an electrode plate (11) and an electrode tab (12) disposed on the electrode plate (11); A temperature detection device (20) is disposed on the main structure (10) and used to detect the temperature of the main structure (10), at least a portion of the temperature detection device (20) is in contact with the electrode (11) and / or the tab (12); A transmission structure (30) is provided, one end of which is electrically connected to the temperature detection device (20), and the other end of which is electrically connected to the control module to transmit the detection information of the temperature detection device (20) to the control module.

2. The cell assembly according to claim 1, characterized in that, The battery cell assembly also includes: The flexible cover (40) has a receiving cavity and a through hole (41) communicating with the receiving cavity. The electrode (11) is disposed in the receiving cavity, and the end of the electrode tab (12) away from the electrode (11) extends out of the receiving cavity through the through hole (41).

3. The cell assembly according to claim 2, characterized in that, The temperature detection device (20) is disposed on the electrode (11), and at least a portion of the temperature detection device (20) is in contact with the electrode (11); The flexible covering (40) also has a through hole (42) communicating with the receiving cavity. One end of the transmission structure (30) for electrical connection with the temperature detection device (20) is located inside the receiving cavity, and the other end of the transmission structure (30) for electrical connection with the control module extends out of the receiving cavity through the through hole (42).

4. The cell assembly according to claim 2, characterized in that, The temperature detection device (20) is disposed on the tab (12), at least a portion of the temperature detection device (20) is in contact with the tab (12), and the transmission structure (30) is located outside the receiving cavity.

5. The cell assembly according to any one of claims 1 to 4, characterized in that, The transmission structure (30) includes a first transmission section (31) and a second transmission section (32) that are electrically connected to each other. The end of the first transmission unit (31) away from the second transmission unit (32) is electrically connected to the temperature detection device (20), and the end of the second transmission unit (32) away from the first transmission unit (31) is electrically connected to the control module; The first transmission unit (31) is a linear structure or a plate structure, and the second transmission unit (32) is a linear structure or a plate structure.

6. The cell assembly according to claim 5, characterized in that, The first transmission unit (31) is one of a wire and a flexible circuit board, and the second transmission unit (32) is one of a wire and a flexible circuit board.

7. The cell assembly according to claim 6, characterized in that, When one of the first transmission section (31) and the second transmission section (32) is a wire, and the other of the first transmission section (31) and the second transmission section (32) is a flexible circuit board, the transmission structure (30) further includes: A transition section (33) is disposed between the first transmission section (31) and the second transmission section (32), and the two ends of the transition section (33) are electrically connected to the first transmission section (31) and the second transmission section (32) respectively.

8. The cell assembly according to claim 5, characterized in that, The transmission structure (30) further includes: A terminal is disposed on one end of the second transmission unit (32) away from the first transmission unit (31), and the second transmission unit (32) is electrically connected to the control module through the terminal.

9. A battery, characterized in that, The battery includes a cell assembly and a control module. The cell assembly is electrically connected to the control module through its transmission structure (30). The cell assembly is the cell assembly according to any one of claims 1 to 8.

10. A battery module, characterized in that, The battery includes the battery described in claim 9.

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