Battery module and battery pack

Abstract

The application discloses a battery module and a battery pack. The battery module comprises a battery cell assembly, an end plate and a wire harness assembly. The battery cell assembly comprises a battery cell. The end plate comprises at least two end plates. The at least two end plates are arranged on opposite sides of the battery cell assembly along the thickness direction of the battery cell assembly, and the end plates on the opposite sides are fixedly connected to clamp and fix the battery cell assembly. The wire harness assembly comprises a wire harness and a wiring circuit board. The wire harness is electrically connected between the wiring circuit board and the tab of the battery cell. The wiring circuit board is installed on the end plate to be electrically connected with a temperature and voltage acquisition device. The battery module and the battery pack can at least solve the problem that the temperature and voltage acquisition mode of the soft package battery module in the prior art is relatively complex.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery module and battery pack. Background Technology

[0002] In related technologies, sampling harnesses (which simultaneously acquire temperature and voltage data) are typically soldered onto the busbars of pouch battery modules to collect the temperature and voltage of the battery cells, or circuit boards are built into the cell trays of the pouch battery modules to collect the temperature and voltage of the cells. However, the temperature and voltage acquisition methods of both sampling harnesses and built-in circuit boards are relatively complex. Utility Model Content

[0003] The main purpose of this application is to provide a battery module and battery pack to solve the problem that the temperature and voltage acquisition methods of existing soft-pack battery modules are relatively complex.

[0004] According to one aspect of this application, a battery module is provided, comprising: Battery cell assembly, the battery cell assembly including battery cells; End plates, the end plates include at least two pieces, the at least two end plates are spaced apart along the thickness direction of the battery cell assembly on opposite sides of the battery cell assembly, and the end plates on opposite sides are fixedly connected to clamp and fix the battery cell assembly; A wiring harness assembly, comprising a wiring harness and a wiring circuit board, wherein the wiring harness is electrically connected between the wiring circuit board and the tabs of the battery cell, and the wiring circuit board is mounted on the end plate for at least electrical connection to a temperature and voltage acquisition device.

[0005] Furthermore, the battery cell assembly includes multiple components, and the wiring harness assembly includes multiple components; Multiple battery cell assemblies are stacked sequentially along the thickness direction of the battery cell assembly, and adjacent battery cell assemblies are electrically connected. Multiple wire harness assemblies are spaced apart along the length direction of the battery cell assembly, and the wire harness assemblies are arranged in a one-to-one correspondence with the battery cell assemblies.

[0006] Furthermore, the battery cell assembly also includes a tray, on which a mounting cavity and a clearance opening are provided. The clearance opening and the mounting cavity are electrically connected. The battery cell is located in the mounting cavity. The wiring harness is electrically connected to the tab of the battery cell and passes through the clearance opening to be electrically connected to the wiring circuit board.

[0007] Furthermore, the battery cell assembly includes a plurality of battery cells, the tray includes a plurality of clearance openings, and the end plate includes a plurality of clearance notches; Along the length of the battery cell assembly, a plurality of battery cells are sequentially spaced apart and electrically connected in the mounting cavity, and a clearance opening is provided between each two adjacent battery cells on the tray; Along the length of the cell assembly, a plurality of clearance notches are spaced apart on the end plate and correspond to the corresponding clearance openings. The clearance openings and clearance notches are at least used to allow the wire harness to pass through for electrical connection with the corresponding wiring circuit board.

[0008] Furthermore, in the plurality of battery cell assemblies, the clearance openings on each of the trays correspond one-to-one, and along the thickness direction of the battery cell assembly, the corresponding clearance openings on two adjacent trays are stacked to form a clearance groove for the wire harness to pass through; and / or, The battery module includes a fixing member; among the plurality of battery cell assemblies, each battery cell assembly includes an insulating bracket; each insulating bracket is fixedly connected to a corresponding tray; the fixing member passes through the insulating bracket and the end plate to fix each battery cell assembly and the end plate; and / or Along the height direction of the cell assembly, there is a predetermined gap between the top of the cell and the tray, and the wire harness passes through at least part of the predetermined gap.

[0009] Furthermore, the battery module also includes multiple protective plates, and the multiple protective plates are spaced apart along the length direction of the cell assembly and are arranged one-to-one with the clearance slots. The protective plates cover the clearance slots to at least cover part of the opening of the clearance slots.

[0010] Furthermore, the end plate includes a first end plate and a second end plate; Along the thickness direction of the cell assembly, the first end plate is located on the first side of the battery module, and the second end plate is located on the second side of the battery module opposite to the first side. At least a portion of the wiring harness assembly's wiring circuit board is mounted on the first end plate, and at least another portion of the wiring harness assembly's wiring circuit board is mounted on the second end plate.

[0011] Furthermore, the end plate is provided with a mounting portion, and the wiring circuit board is mounted to the end plate through the mounting portion; and / or, The wiring circuit board includes a first terminal block, and the temperature and voltage acquisition device includes an acquisition line and a second terminal block. The temperature and voltage acquisition device is electrically connected to the second terminal block through the acquisition line, and the second terminal block is plugged into the first terminal block.

[0012] Furthermore, the mounting part includes a mounting post, the battery module also includes a locking member, and the wiring circuit board is sleeved on the mounting post and detachably mounted to the end plate through the locking member.

[0013] On the other hand, this application also provides a battery pack, which includes the battery module described above.

[0014] In this application, at least two end plates are spaced apart and fixedly connected on opposite sides along the thickness direction of the cell assembly. This allows for precise positioning of the cell assembly, preventing relative movement between the cell assembly and the end plates, ensuring the structural stability of the battery module, and improving its safety. Simultaneously, the clamping of the end plates allows the cell assembly to form a stable whole, thereby enhancing the battery module's resistance to shock and vibration and ensuring reliable operation under various complex operating conditions. The wiring harness assembly electrically connects the wiring circuit board to the cell's tabs. When temperature and voltage data collection from the cell assembly is required, simply connecting the temperature and voltage acquisition device to the wiring circuit board allows for the collection of cell temperature and voltage data, greatly simplifying the method of temperature and voltage data acquisition for the battery module.

[0015] In other words, compared with existing soft-pack battery modules, this application uses a wiring harness assembly to electrically connect the temperature and voltage acquisition device to the battery cell's tabs, which can simplify the connection process between the temperature and voltage acquisition device and the battery cell's tabs to a certain extent, and can also reduce manufacturing costs to a certain extent, which is beneficial to production and manufacturing. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, are illustrative and descriptive, serving to explain this application and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a structural diagram of the battery module disclosed in an embodiment of this application; Figure 2 for Figure 1 Enlarged view of section A; Figure 3 An exploded view of the battery module disclosed in an embodiment of this application; Figure 4 This is a schematic diagram showing the connection of multiple battery cell assemblies and multiple wire harness assemblies disclosed in the embodiments of this application; Figure 5 This is a schematic diagram showing the connection of the battery cell assembly and the wiring harness assembly disclosed in an embodiment of this application; Figure 6 The diagram shows the structure of the tray as disclosed in the embodiments of this application; Figure 7 This is a structural diagram of the first end plate (i.e., the second end plate) disclosed in an embodiment of this application; Figure 8 for Figure 7 Enlarged view of section B.

[0017] The above figures include the following reference numerals: 100. Battery module; 10. Cell assembly; 101. First side; 102. Second side; 11. Cell; 111. Tab; 12. Tray; 121. Mounting cavity; 122. Clearance opening; 123. Predetermined gap; 13. Insulating bracket; 20. End plate; 201. Clearance notch; 202. Mounting part; 2021. Mounting post; 21. First end plate; 211. Metal end plate; 212. Insulating end plate; 22. Second end plate; 30. Wiring harness assembly; 31. Wiring harness; 32. Wiring circuit board; 321. First terminal block; 40. Clearance groove; 401. Groove opening; 50. Fixing component; 60. Protective plate; 70. Locking component; 200. Data acquisition line. Detailed Implementation

[0018] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] 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 the present invention. 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.

[0020] 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.

[0021] As described in the background section, in related technologies, sampling harnesses (which simultaneously acquire temperature and voltage data) are typically soldered onto the busbars of pouch battery modules to collect the temperature and voltage of the battery cells, or circuit boards are built into the cell trays of the pouch battery module to collect the temperature and voltage of the cells. However, the temperature and voltage acquisition methods of the sampling harnesses and the built-in circuit boards are relatively complex. Therefore, this application provides a new battery module and battery pack that solves the problem of the complex temperature and voltage acquisition methods in existing pouch battery modules. The battery module of this application will be described below with reference to the accompanying drawings.

[0022] See Figures 1 to 8 As shown, an embodiment of this application provides a battery module 100, which includes a cell assembly 10, an end plate 20, and a wiring harness assembly 30.

[0023] The battery cell assembly 10 includes a battery cell 11; the end plate 20 includes at least two plates, and the at least two end plates 20 are arranged along the thickness direction of the battery cell assembly 10 (i.e., Figure 1 , Figure 3 as well as Figure 4 The thickness direction shown is shown. The end plates 20 on the opposite sides of the battery cell assembly 10 are spaced apart, and the end plates 20 on the opposite sides are fixedly connected to clamp and fix the battery cell assembly 10. The wiring harness assembly 30 includes a wiring harness 31 and a wiring circuit board 32. The wiring harness 31 is electrically connected between the wiring circuit board 32 and the tab 111 of the battery cell 11, and the wiring circuit board 32 is mounted on the end plate 20 for at least electrical connection with a temperature and voltage acquisition device (not shown in the figure).

[0024] In this application, at least two end plates 20 are spaced apart and fixedly connected on opposite sides along the thickness direction of the cell assembly 10. This allows for precise positioning of the cell assembly 10, preventing relative movement between the cell assembly 10 and the end plates 20, ensuring the structural stability of the battery module 100, and improving its safety. Simultaneously, the clamping of the end plates 20 allows the cell assembly 10 to form a stable whole, thereby enhancing its resistance to impact and vibration and ensuring reliable operation under various complex working conditions. The wiring harness assembly 30 electrically connects the wiring circuit board 32 to the tabs 111 of the cell 11 via the wiring harness 31. When temperature and voltage data collection of the cell 11 in the cell assembly 10 is required, simply connecting the temperature and voltage acquisition device to the wiring circuit board 32 allows for the acquisition of temperature and voltage data of the cell 11, greatly simplifying the temperature and voltage acquisition method of the battery module 100.

[0025] In other words, compared with the existing soft-pack battery module 100, this application uses a wiring harness assembly 30 to electrically connect the temperature and voltage acquisition device to the tab 111 of the cell 11, which can simplify the connection process between the temperature and voltage acquisition device and the tab 111 of the cell 11 to a certain extent, and can also reduce manufacturing costs to a certain extent, which is beneficial to production and manufacturing.

[0026] It is understood that the temperature and voltage acquisition device of this application is a data acquisition device that simultaneously has the functions of temperature data acquisition and voltage data acquisition. When the battery module 100 is actually working (i.e., the battery module 100 is charging or discharging), the temperature and voltage acquisition device can simultaneously acquire the temperature data and voltage data of the cells in the battery module 100. This allows for better feedback of relevant data (such as temperature data and voltage data) of the battery module 100 during operation to the operator. Consequently, the operator can make corresponding adjustments to the battery module 100 based on the relevant data to prevent damage to the battery module 100 or safety accidents. For example, if the operator learns from the temperature and voltage acquisition device that the temperature of the battery module 100 is too high, the operator can reduce the temperature of the battery module 100 by physical heat dissipation or by reducing the actual operating power of the battery module 100. This can prevent problems before they occur, preventing the battery module 100 from being damaged or exploded due to overheating.

[0027] Further, see Figure 1 , Figure 3 as well as Figure 4 As shown, the battery cell assembly 10 includes multiple components, and the wiring harness assembly 30 includes multiple components; the multiple battery cell assemblies 10 are stacked sequentially along the thickness direction of the battery cell assembly 10, and adjacent battery cell assemblies 10 are electrically connected; the multiple wiring harness assemblies 30 are stacked along the length direction of the battery cell assembly 10 (i.e., ...). Figure 1 , Figure 3 as well as Figure 4 The wire harness assembly 30 and the battery cell assembly 10 are arranged at intervals (as shown in the length direction), and the wire harness assembly 30 and the battery cell assembly 10 are arranged in a one-to-one correspondence.

[0028] Specifically, multiple battery cell components 10 are stacked sequentially along their thickness direction, and adjacent battery cell components 10 are electrically connected. This allows the output voltage, capacity, and other parameters of the battery module 100 to be adjusted by changing the number of battery cell components 10, enabling the battery module 100 to meet the diverse needs of different devices. Simultaneously, this adjustability allows the battery module 100 to be applied in various fields such as electric vehicles and energy storage systems, effectively enhancing its market competitiveness and applicability. The electrical connection between adjacent battery cell components 10 ensures stable current transmission between them. The wiring harness assemblies 30 are arranged in a one-to-one correspondence with the cell assemblies 10, meaning each cell assembly 10 corresponds to one wiring harness assembly 30. When it is necessary to collect temperature and voltage data of the cells 11 in the cell assembly 10, the temperature and voltage acquisition device can be electrically connected to the wiring circuit board 32 corresponding to the cell assembly 10, thereby accurately collecting the temperature and voltage data of the cells 11 in the cell assembly 10. This provides detailed and accurate information to the battery management system (not shown in the figure), ensuring the safe and stable operation of the battery module 100. The cell assemblies 10 are stacked along the thickness direction to form the battery module 100, and the wiring harness assemblies 30 are arranged at intervals along the length direction of the cell assemblies 10, with the wiring circuit boards 32 sequentially installed at corresponding positions on the end plate 20. This allows for the reasonable selection and routing of the length of the wiring harness 31 corresponding to each wiring harness assembly 30 during the assembly of the battery module 100, avoiding resource waste and excessive space occupation of the battery module 100. Furthermore, compared to existing soft-pack battery modules, the battery module 100 of this application can weld the wire harness 31 of each wire harness assembly 30 to the corresponding cell assembly 10 during the production stage of the battery module 100. This can avoid interference caused by the wire harness assembly 30 when the cell assemblies 10 are stacked into a group (i.e., the cell assemblies 10 are stacked to form the battery module 100). This not only helps the cell assemblies 10 to be stacked into a group, but also helps to rationally plan the direction and fixed position of the wire harness 31, thereby improving the rationality of the layout between the various structures of the battery module 100.

[0029] It is understood that the electrical connection between two adjacent battery cell assemblies 10 means that they can be connected in series or in parallel, depending on the actual situation and needs. This application does not impose any specific limitations. Furthermore, in this application, the number of battery cell assemblies 10 and wiring harness assemblies 30 can be reasonably selected according to the actual situation and needs. This application does not impose any specific limitations. This embodiment shows a case where both the number of battery cell assemblies 10 and the number of wiring harness assemblies 30 are 12.

[0030] Further, see Figure 1 , Figures 3 to 6 As shown, the battery cell assembly 10 also includes a tray 12, on which a mounting cavity 121 and a clearance opening 122 are provided. The clearance opening 122 and the mounting cavity 121 are connected. The battery cell 11 is located in the mounting cavity 121. The wire harness 31 is electrically connected to the tab 111 of the battery cell 11 and passes through the clearance opening 122 to be electrically connected to the wiring circuit board 32.

[0031] Specifically, the mounting cavity 121 of the tray 12 provides a reasonable mounting position for the battery cell 11 and also plays a role in accurately positioning the battery cell 11, preventing it from shaking within the battery module 100, ensuring the stability of the battery cell 11's position, effectively enhancing the structural stability of the battery module 100, and ensuring the safe use of the battery module 100. Furthermore, the battery cell 11 is located within the mounting cavity 121, allowing the tray 12 to enclose the battery cell 11, thus providing physical protection, reducing damage caused by external impacts and collisions, extending the battery cell 11's lifespan, and improving the overall performance of the battery module 100. Because the clearance opening 122 is conductive to the mounting cavity 121, after one end of the wiring harness 31 is electrically connected to the tab 111 of the cell 11 (i.e., by welding, snap-fit, or other electrical connection methods), the other end of the wiring harness 31 can smoothly pass through the clearance opening 122 and connect to the wiring circuit board 32 mounted on the end plate 20. This effectively simplifies the connection path of the wiring harness 31 and ensures convenient and efficient electrical connection between the cell assembly 10 and the wiring harness assembly 30. Simultaneously, this design, where the wiring harness 31 passes through the clearance opening 122 and connects to the wiring circuit board 32, allows for more organized and orderly wiring within the battery module 100, preventing the wiring harness 31 from becoming tangled and messy inside the battery module 100, reducing electromagnetic interference between the wiring harnesses, improving electrical performance stability, and facilitating inspection of the wiring harness 31 during later maintenance and repair. In addition, the tray 12 is in close contact with the battery cell 11, which can effectively dissipate heat from the battery cell 11 and conduct away the heat generated by the battery cell 11 during operation. This can effectively optimize the heat dissipation performance of the battery module 100 and ensure that the battery cell 11 can operate at a suitable temperature.

[0032] Further, see Figures 1 to 5 As shown, the battery cell assembly 10 includes a plurality of battery cells 11, the tray 12 includes a plurality of clearance openings 122, and the end plate 20 includes a plurality of clearance notches 201. Along the length direction of the battery cell assembly 10, the plurality of battery cells 11 are sequentially and spaced apart in the mounting cavity 121 and electrically connected, and clearance openings 122 are provided between adjacent battery cells 11 on the tray 12. Along the length direction of the battery cell assembly 10, the plurality of clearance notches 201 are spaced apart on the end plate 20 and correspond to the corresponding clearance openings 122. The clearance openings 122 and clearance notches 201 are at least used for the wire harness 31 to pass through to be electrically connected to the corresponding wiring circuit board 32.

[0033] Specifically, multiple battery cells 11 are sequentially spaced and electrically connected within the mounting cavity 121 along the length of the battery cell assembly 10. This makes the layout of the battery cells 11 more regular, ensuring the structural stability of the battery module 100, facilitating stable current transmission, and improving electrical performance. Simultaneously, the spaced arrangement of the battery cells 11 facilitates installation and connection, reducing installation difficulty and improving assembly efficiency. It also facilitates heat dissipation, preventing localized overheating of the battery cell assembly 10 due to close proximity of the cells 11. Multiple clearance openings 122 and multiple clearance notches 201 are spaced apart and correspond to each other along the length of the battery cell assembly 10, providing a clear and orderly wiring channel for the wiring harness 31 (i.e., the clearance groove 40 mentioned below). This allows the wiring harness 31 to pass through and electrically connect to the corresponding wiring circuit board 32, making the internal wiring of the battery module 100 more organized and effectively reducing electromagnetic interference. The orderly arrangement of the battery cells 11 within the mounting cavity 121, along with the corresponding clearance openings 122 and clearance notches 201, provides clear guidance for operators. This allows them to quickly and accurately install the corresponding battery cells 11 into their designated positions and thread the appropriate length of wire harness 31 through the corresponding clearance openings 122 and clearance notches 201 to electrically connect with the wiring circuit board 32 on the end plate 20, effectively improving assembly efficiency. Furthermore, the spacing between the battery cells 11 and the presence of clearance openings 122 and clearance notches 201 facilitate airflow within the battery module 100, forming heat dissipation channels to carry away the heat generated by the battery cells 11. This optimizes the heat dissipation performance of the battery module 100, ensuring that the battery cells 11 operate at suitable temperatures.

[0034] It is understood that in this application, the number of cells 11 in each cell assembly 10, the number of clearance openings 122 on each tray 12, and the number of clearance notches 201 on each end plate 20 can be reasonably adjusted according to actual conditions and needs. This application does not impose specific limitations. Meanwhile, this embodiment shows the case where the number of cells 11 in each cell assembly 10 is 4, the number of clearance openings 122 on each tray 12 is 3, and the number of clearance notches 201 on each end plate 20 is 3.

[0035] Further, see Figures 1 to 5 As shown, in the multiple cell assemblies 10, the clearance openings 122 on each tray 12 correspond one-to-one. Along the thickness direction of the cell assembly 10, the corresponding clearance openings 122 on two adjacent trays 12 are stacked to form a clearance groove 40 for the wire harness 31 to pass through.

[0036] Specifically, the corresponding clearance openings 122 on each tray 12, and the overlapping clearance openings 122 on adjacent trays 12, form clearance grooves 40. This provides a straight and orderly wiring channel for the wire harness 31, preventing the wire harness 31 from being randomly distributed within the battery module 100, reducing electromagnetic interference between wire harnesses 31, and effectively improving the electrical performance stability of the battery module 100. Simultaneously, the existence of the clearance grooves 40 makes the installation of the wire harness 31 more convenient, allowing operators to more easily pass the wire harness 31 through each layer of trays 12, effectively improving the assembly efficiency of the battery module 100. Furthermore, the one-to-one correspondence and overlapping of the clearance openings 122 to form clearance grooves 40 helps to accurately position adjacent trays 12 in the thickness direction of the cell assembly 10, making the relative positions between multiple cell assemblies 10 more stable, and effectively enhancing the overall structural stability of the battery module 100. Furthermore, the clearance groove 40 can serve as part of an airflow channel, facilitating airflow between the cell components 10, aiding in heat dissipation of the cell 11, optimizing the heat dissipation performance of the battery module 100, and ensuring that the cell 11 can operate within a suitable temperature range. In this application, operators can rationally design the clearance groove 40 by adjusting the size and spacing of the clearance openings 122, thereby enabling the clearance groove 40 to adapt to different specifications of wire harnesses 31, effectively enhancing the compatibility of the battery module 100 with various wire harnesses and meeting the needs of different application scenarios.

[0037] Optionally, the battery module 100 includes a fixing member 50. Among the multiple cell assemblies 10, each cell assembly 10 includes an insulating bracket 13. Each insulating bracket 13 is fixedly connected to the corresponding tray 12. The fixing member 50 passes through the insulating bracket 13 and the end plate 20 to fix each cell assembly 10 and the end plate 20.

[0038] Specifically, the fasteners 50 pass through the insulating bracket 13 and the end plate 20, firmly connecting each cell assembly 10 to the end plate 20. This allows the components of the battery module 100 to form a tight and stable whole, effectively enhancing its resistance to impact and vibration and ensuring reliable operation under various working conditions. Simultaneously, by rationally setting the number and installation position of the fasteners 50, this application can evenly distribute force among the cell assemblies 10, avoiding localized stress concentration, further improving the stability and reliability of the battery module 100 structure, and extending its service life. The fastening effect of the fasteners 50 ensures accurate relative positioning between each cell assembly 10 and the end plate 20, preventing component displacement during use (i.e., relative movement between the cell assembly 10 and the end plate 20, and relative movement among the cell assemblies 10), which would affect the performance and safety of the battery module 100. In addition, the combined effect of the insulating bracket 13 and the end plate 20 provides double insulation protection for the battery cell 11, preventing the battery cell 11 from short-circuiting due to contact with external components, and ensuring the electrical safety of the battery module 100.

[0039] It is understood that in this application, the number and installation position of the insulating supports 13 of each cell assembly 10 can be reasonably set according to the actual situation and needs. This application does not impose specific restrictions. At the same time, this embodiment shows the case where each cell assembly 10 includes five insulating supports 13.

[0040] Optionally, along the height direction of the cell assembly 10 (i.e. Figure 1 , Figure 4 as well as Figure 5 As shown in the height direction, a predetermined gap 123 exists between the top of the cell 11 and the tray 12, and the wiring harness 31 passes through at least part of the predetermined gap 123. Specifically, along the height direction of the cell assembly 10, the predetermined gap 123 between the top of the cell 11 and the tray 12 provides dedicated wiring space for the wiring harness 31, allowing the wiring harness 31 to have a more regular arrangement path within the battery module 100, avoiding spatial interference between the wiring harness 31 and other components, and helping to improve the rationality of the internal layout of the battery module 100. At the same time, the setting of the predetermined gap 123 provides a relatively stable arrangement space for the wiring harness 31, which can prevent the electrical connection from becoming loose due to friction or compression between the wiring harness 31 and other components, and ensure the reliability of the electrical connection between the wiring harness 31 and the tabs 111 of the cell 11 and the wiring circuit board 32. Furthermore, the predetermined gap 123 serves as part of an airflow channel, facilitating airflow over the top of the cell 11 and carrying away the heat generated during operation. This optimizes the heat dissipation performance of the battery module 100, ensuring that the cell 11 operates within a suitable temperature range. Additionally, by adjusting the size of the predetermined gap 123, it can be adapted to different specifications of wiring harnesses 31, making the battery module 100 more flexible in design and capable of meeting diverse needs in practical applications.

[0041] Further, see Figures 1 to 3 As shown, the battery module 100 also includes a plurality of protective plates 60, and the plurality of protective plates 60 are spaced apart along the length direction of the cell assembly 10 and are respectively arranged in correspondence with the clearance groove 40. The protective plates 60 cover the clearance groove 40 to at least cover part of the groove opening 401 of the clearance groove 40.

[0042] Specifically, the protective plate 60 covers the clearance groove 40, partially obscuring the groove opening 401 to prevent the wiring harness 31 from being damaged by external collisions or friction. This effectively protects the wiring harness 31 from damage, ensuring the reliability of the electrical connection of the battery module 100 and reducing the risk of failure due to damage to the wiring harness 31. Simultaneously, the protective plate 60 prevents dust, moisture, and other external impurities from entering the clearance groove 40 and contacting the wiring harness 31, preventing the wiring harness 31 from being affected by moisture or dust accumulation, thus extending its service life. The corresponding arrangement of the protective plate 60 and the clearance groove 40 guides airflow within the battery module 100 to a certain extent, assisting in heat dissipation of the battery cell 11. Airflow along the channel formed by the protective plate 60 and the clearance groove 40 more effectively removes the heat generated by the battery cell 11 during operation, optimizing the heat dissipation performance of the battery module 100. Instead of using a single protective plate 60 to cover all the clearance slots 40, the protective plate 60 corresponds one-to-one with each clearance slot 40. This saves resources and reduces the overall weight of the battery module 100, thus improving its range to some extent. Furthermore, the protective plate 60 covers at least part of the openings 401 of the clearance slots 40, resulting in a cleaner and more aesthetically pleasing appearance, effectively enhancing the overall image of the battery module 100 and strengthening its market competitiveness.

[0043] Further, see Figures 1 to 3 As shown, the end plate 20 includes a first end plate 21 and a second end plate 22. Along the thickness direction of the cell assembly 10, the first end plate 21 is located on the first side 101 of the battery module 100, and the second end plate 22 is located on the second side 102 of the battery module 100 opposite to the first side 101. At least a portion of the wiring harness assembly 30's wiring circuit board 32 is mounted on the first end plate 21, and at least another portion of the wiring harness assembly 30's wiring circuit board 32 is mounted on the second end plate 22.

[0044] Specifically, at least a portion of the wiring harness assembly 30's wiring circuit board 32 is mounted on the first end plate 21, and the other portion is mounted on the second end plate 22. This allows for a more rational distribution of the electrical connection lines within the battery module 100, preventing excessive concentration of lines on one side of the battery module 100. This effectively reduces electromagnetic interference between the wiring harnesses 31 and improves the electrical performance stability of the battery module 100. Mounting the wiring circuit board 32 on the first end plate 21 and the second end plate 22 on opposite sides of the battery module 100 allows for more comprehensive collection of temperature and voltage data from the battery cells 11. This provides more detailed and accurate information to the battery management system (not shown in the figure), facilitating precise management and control of the battery module 100. In this application, the number and position of the wiring circuit boards 32 on the first end plate 21 and the second end plate 22 can be reasonably adjusted according to actual conditions and needs. This application does not impose specific limitations. Meanwhile, this embodiment shows that the number of wiring circuit boards 32 on the first end plate 21 and the second end plate 22 are both 6, and the wiring circuit boards 32 on the first end plate 21 and the wiring circuit boards 32 on the second end plate 22 are symmetrical. That is to say, in the 12 battery cell assemblies 10 in this embodiment, the 6 battery cell assemblies 10 closest to the first end plate 21 are electrically connected to the 6 wiring circuit boards 32 on the first end plate 21, and the 6 battery cell assemblies 10 closest to the second end plate 22 are electrically connected to the 6 wiring circuit boards 32 on the second end plate 22. This allows the arrangement of the wire harnesses 31 in each clearance slot 40 to be more uniform, avoiding the wire harnesses 31 from accumulating and occupying too much space or causing electrical interference.

[0045] It is understandable that: see Figures 1 to 3 As shown, in some embodiments of this application, such as in this embodiment, both the first end plate 21 and the second end plate 22 include a metal end plate 211 and an insulating end plate 212. During actual installation, the insulating end plate 212 is located between the end cell of the battery module 100 (i.e., the cell assembly 10 located at the end of the battery module 100) and the metal end plate 211, providing electrical insulation and preventing short circuits between the positive and negative terminals of the cell 11 and the metal end plate 211. Furthermore, the insulating end plate 212 can buffer the expansion stress of the battery cell 11 during expansion, preventing excessive deformation of the battery module 100 due to expansion stress. The metal end plate 211 serves as a strength support for the battery module 100, providing structural fixation and preventing deformation under external forces. It offers some protection to the battery cell assembly 10. Moreover, the metal end plate 211, in addition to the insulating end plate 212, further resists the expansion stress of the battery cell 11 during expansion, preventing excessive deformation of the battery module 100 and ensuring its normal operation. In other embodiments of this application, the first end plate 21 and the second end plate 22 can also be metal end plates with an insulating layer.

[0046] Further, see Figures 1 to 3 , Figure 7 as well as Figure 8 As shown, a mounting portion 202 is provided on the end plate 20, and the wiring circuit board 32 is mounted on the end plate 20 via the mounting portion 202. Specifically, the mounting portion 202 on the end plate 20 provides a precise mounting position for the wiring circuit board 32, allowing it to be accurately installed at a predetermined position on the end plate 20. This effectively ensures the connection accuracy between the wiring circuit board 32 and the tabs 111 of the battery cell 11, as well as the temperature and voltage acquisition device, thereby ensuring the stability of the electrical performance of the battery module 100 and the accuracy of the data collected by the temperature and voltage acquisition device. The cooperation between the mounting portion 202 and the wiring circuit board 32 enhances the connection strength between the wiring circuit board 32 and the end plate 20, enabling the wiring circuit board 32 to resist vibration and impact during the operation of the battery module 100, preventing it from loosening or shifting, and ensuring the reliability of the electrical connection. Furthermore, as part of the end plate 20, the mounting portion 202 further enhances the insulation effect between the wiring circuit board 32 and the battery cell assembly 10, preventing electrical short circuits between the wiring circuit board 32 and the battery cell 11, and effectively ensuring the electrical safety of the battery module 100.

[0047] It is understood that in this application, in order to facilitate the installation of the mounting part 202 on the end plate 20 and to ensure the structural strength of the mounting part 202, the mounting part 202 is generally provided on the metal end plate 211 of the end plate 20. In this way, after the wiring circuit board 32 is installed on the metal end plate 211, the wiring circuit board 32 is not easy to deform or fall off under the action of external force, thereby making the wiring circuit board 32 more reliable. At the same time, the insulating end plate 212 is located between the end cell of the battery module 100 and the metal end plate 211, and can play an electrical insulation role for the wiring circuit board 32 and the cell assembly 10, thereby ensuring that the battery module 100 of this application is safer and more reliable.

[0048] Optionally, the wiring circuit board 32 includes a first terminal block 321, and the temperature and voltage acquisition device includes an acquisition line 200 and a second terminal block (not shown in the figure). The temperature and voltage acquisition device is electrically connected to the second terminal block through the acquisition line 200, and the second terminal block is plugged into the first terminal block 321.

[0049] Specifically, the second terminal block is plugged into the first terminal block 321, eliminating the need for complex soldering or other cumbersome connection processes. This allows operators to quickly connect the temperature and voltage acquisition device to the wiring circuit board 32, effectively improving assembly efficiency. This plug-in connection method enables the temperature and voltage acquisition device to be "plug and play," facilitating flexible access or replacement of the acquisition device during the assembly of the battery module 100 to meet the needs of different testing or usage scenarios. Simultaneously, the plug-in connection ensures good electrical contact between the second terminal block and the first terminal block 321, reducing resistance and ensuring stable transmission of temperature and voltage data acquired by the device, providing accurate data for the battery management system. Furthermore, the plug-in structure (i.e., the plug-in structure formed by the second terminal block and the first terminal block 321) possesses a certain mechanical strength. During battery module 100 operation, the plug-in structure can withstand vibration and impact, preventing signal interruption due to loose connections and ensuring reliable connection between the temperature and voltage acquisition device and the wiring circuit board 32. The temperature and voltage acquisition devices are electrically connected to the second terminal block via acquisition line 200, and then connected to the first terminal block 321 of the wiring circuit board 32 via a plug-in connection, forming a relatively independent yet tightly integrated module. The independent modules facilitate separate production, testing, and optimization, while the integrated module effectively enhances the overall functionality of the battery module 100. Furthermore, this modular design allows operators to flexibly expand or replace the temperature and voltage acquisition devices with higher-level ones according to different application scenarios and needs, effectively enhancing the adaptability and scalability of the battery module 100.

[0050] Further, see Figures 1 to 3 , Figure 7 as well as Figure 8 As shown, the mounting part 202 includes a mounting post 2021, the battery module 100 also includes a locking member 70, and the wiring circuit board 32 is sleeved on the mounting post 2021 and detachably mounted on the end plate 20 through the locking member 70.

[0051] Specifically, the mounting post 2021 provides a precise positioning reference for the wiring circuit board 32. The wiring circuit board 32, fitted onto the mounting post 2021, accurately determines its position on the end plate 20, facilitating a reasonable layout of the wire harness 31's length and routing, preventing redundant wire harness length or excessive space occupation. The locking element 70 firmly secures the wiring circuit board 32, fitted onto the mounting post 2021, to the end plate 20. This connection method effectively resists vibrations and impacts generated during battery module 100 operation, preventing the wiring circuit board 32 from loosening and shifting under external forces, ensuring the reliability of the electrical connection, and improving the overall structural stability of battery module 100 to a certain extent. The mounting post 2021 and locking element 70 make the installation process of the wiring circuit board 32 simpler and clearer. Operators only need to fit the wiring circuit board 32 onto the mounting post 2021 and then use the locking element 70 to fix it, greatly improving assembly efficiency and reducing assembly difficulty. Furthermore, during maintenance and repair, the wiring circuit board 32 can be easily removed from the mounting post 2021 by disassembling the locking member 70, facilitating inspection, repair, or replacement of the wiring circuit board 32. This detachable installation method improves the maintainability of the battery module 100 and reduces maintenance costs. In this application, by adjusting the size and shape of the mounting post 2021 and the type of the locking member 70, different specifications and shapes of wiring circuit boards 32 can be accommodated, improving the compatibility of the battery module 100 with different wiring circuit boards 32, effectively enhancing design flexibility, and meeting diverse application needs.

[0052] On the other hand, see Figures 1 to 8 As shown, this application also provides a battery pack (not shown in the figure), which includes the battery module 100 described above. Therefore, the battery pack includes all the technical effects of the battery module 100 described above. Since the technical effects of the battery module 100 have been described in detail above, they will not be repeated here.

[0053] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects: (1) The battery module uses end plates to clamp and fix the cell assembly, which can ensure the structural stability and safety of the cell assembly. At the same time, the battery module uses wire harness assembly to electrically connect the cell assembly to the temperature and voltage acquisition device, which simplifies the temperature and voltage acquisition method.

[0054] (2) Multiple battery cell components are stacked and adjacent battery cell components are electrically connected. The output or output parameters of the battery module can be adjusted by relevant data (such as temperature data and voltage data) collected by temperature and voltage acquisition devices, which can effectively optimize the working performance of the battery module.

[0055] (3) The tray can position and protect the battery cells. At the same time, the design of the clearance simplifies the wiring path of the harness, which can optimize the wiring and enhance the heat dissipation performance of the battery module.

[0056] (4) The clearance groove provides a regular wiring channel for the wire harness, which not only facilitates the installation of the wire harness, but also enhances the structural stability and heat dissipation performance of the battery module.

[0057] (5) The battery module uses a fastener to connect the cell assembly and the end plate, which can enhance the stability of the overall structure of the battery module. At the same time, the insulating bracket and the end plate can provide double insulation for the cell, effectively protecting the cell.

[0058] (6) The setting of the predetermined gap provides reasonable wiring space for the wiring harness and optimizes the heat dissipation of the battery module.

[0059] (7) The protective plate can effectively protect the wiring harness and guide airflow to ventilate and dissipate heat inside the battery module.

[0060] (8) The wiring circuit board is installed on both sides, which can optimize the distribution of electrical lines and collect data to accurately manage the battery module.

[0061] (9) The installation section can ensure the installation accuracy and firmness of the wiring circuit board and improve the reliability of the wiring circuit board.

[0062] (10) The second terminal and the first terminal are connected by plugging in quickly and easily, realizing "plug and play", which simplifies the connection between the temperature and voltage acquisition device and the battery module.

[0063] (11) The battery module uses mounting posts and locking components to install and fix the wiring circuit board, which makes it easy for operators to install and maintain the wiring circuit board, effectively improving installation efficiency and reducing costs.

[0064] 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.

[0065] 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.

[0066] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements 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 module, characterized in that, include: A battery cell assembly (10), the battery cell assembly (10) comprising a battery cell (11); End plate (20), the end plate (20) includes at least two pieces, the at least two end plates (20) are spaced apart along the thickness direction of the cell assembly (10) on opposite sides of the cell assembly (10), and the end plates (20) on opposite sides are fixedly connected to clamp and fix the cell assembly (10); A wiring harness assembly (30) includes a wiring harness (31) and a wiring circuit board (32), wherein the wiring harness (31) is electrically connected between the wiring circuit board (32) and the tabs (111) of the battery cell (11), and the wiring circuit board (32) is mounted on the end plate (20) for at least electrical connection with a temperature and voltage acquisition device.

2. The battery module according to claim 1, characterized in that, The battery cell assembly (10) includes multiple components, and the wiring harness assembly (30) includes multiple components; Multiple battery cell assemblies (10) are stacked sequentially along the thickness direction of the battery cell assembly (10), and adjacent battery cell assemblies (10) are electrically connected. Multiple wire harness assemblies (30) are spaced apart along the length direction of the battery cell assembly (10), and the wire harness assemblies (30) are arranged in a one-to-one correspondence with the battery cell assembly (10).

3. The battery module according to claim 2, characterized in that, The battery cell assembly (10) also includes a tray (12) on which a mounting cavity (121) and a clearance opening (122) are provided. The clearance opening (122) and the mounting cavity (121) are connected. The battery cell (11) is located in the mounting cavity (121). The wire harness (31) is electrically connected to the tab (111) of the battery cell (11) and passes through the clearance opening (122) to be electrically connected to the wiring circuit board (32).

4. The battery module according to claim 3, characterized in that, The battery cell assembly (10) includes a plurality of the battery cells (11), the tray (12) includes a plurality of the clearance openings (122), and the end plate (20) includes a plurality of clearance notches (201). Along the length of the battery cell assembly (10), a plurality of battery cells (11) are sequentially spaced in the mounting cavity (121) and electrically connected, and a clearance opening (122) is provided between two adjacent battery cells (11) on the tray (12). Along the length of the cell assembly (10), a plurality of clearance notches (201) are spaced apart on the end plate (20) and correspond to the corresponding clearance openings (122). The clearance openings (122) and the clearance notches (201) are at least used for the wire harness (31) to pass through to be electrically connected to the corresponding wiring circuit board (32).

5. The battery module according to claim 4, characterized in that, In the plurality of battery cell assemblies (10), the clearance openings (122) on each of the trays (12) correspond one-to-one. Along the thickness direction of the battery cell assembly (10), the corresponding clearance openings (122) on two adjacent trays (12) are stacked to form a clearance groove (40) through which the wire harness (31) passes; and / or, The battery module (100) includes a fixing member (50). In each of the plurality of battery cell assemblies (10), each battery cell assembly (10) includes an insulating support (13). Each insulating support (13) is fixedly connected to a corresponding tray (12). The fixing member (50) passes through the insulating support (13) and the end plate (20) to fix each battery cell assembly (10) and the end plate (20); and / or, Along the height direction of the cell assembly (10), there is a predetermined gap (123) between the top of the cell (11) and the tray (12), and the wire harness (31) passes through at least part of the predetermined gap (123).

6. The battery module according to claim 5, characterized in that, The battery module (100) also includes a plurality of protective plates (60), and the plurality of protective plates (60) are spaced apart along the length direction of the cell assembly (10) and are arranged one-to-one with the clearance groove (40). The protective plates (60) cover the clearance groove (40) to at least cover part of the opening (401) of the clearance groove (40).

7. The battery module according to claim 3, characterized in that, The end plate (20) includes a first end plate (21) and a second end plate (22); Along the thickness direction of the cell assembly (10), the first end plate (21) is located on the first side (101) of the battery module (100), and the second end plate (22) is located on the second side (102) of the battery module (100) opposite to the first side (101). At least a portion of the wiring harness assembly (30)’s wiring circuit board (32) is mounted on the first end plate (21), and at least another portion of the wiring harness assembly (30)’s wiring circuit board (32) is mounted on the second end plate (22).

8. The battery module according to any one of claims 1 to 7, characterized in that, The end plate (20) is provided with a mounting part (202), and the wiring circuit board (32) is mounted on the end plate (20) through the mounting part (202); and / or, The wiring circuit board (32) includes a first terminal (321), and the temperature and voltage acquisition device includes an acquisition line (200) and a second terminal. The temperature and voltage acquisition device is electrically connected to the second terminal through the acquisition line (200), and the second terminal is plugged into the first terminal (321).

9. The battery module according to claim 8, characterized in that, The mounting part (202) includes a mounting post (2021), the battery module (100) also includes a locking member (70), the wiring circuit board (32) is sleeved on the mounting post (2021) and is detachably mounted on the end plate (20) through the locking member (70).

10. A battery pack, characterized in that, The battery pack includes the battery module (100) according to any one of claims 1 to 9.

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