Battery cell and battery cell module

Abstract

The application provides an electric core and an electric core module. The electric core comprises a pole and an explosion-proof structure. The electric core has a protection area matched with a protection piece. The pole is located in the protection area. The protection piece covers the protection area when the protection piece covers the protection area. The normal projection of the explosion-proof structure on the surface of the electric core is located outside the range of the outer edge of the protection area. The application solves the problem that when the explosion-proof valve of the electric core in the prior art fails, the electrolyte impacts other components, leading to a chain thermal runaway.

Description

Technical Field

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

[0002] A battery cell module is a unit assembled from multiple battery cells to provide higher voltage and capacity. Currently, battery cells are assembled into modules through pretreatment and module structure assembly. The CCS (Cell Contact System, i.e., wiring harness integrated unit) is installed directly above the two terminals of the battery cell. If a battery cell fails, it will impact the CCS, and the splashed electrolyte will corrode the CCS, triggering a chain reaction of thermal runaway between adjacent cells within the battery module, affecting the overall performance of the module. Specifically, on the one hand, when the cell's explosion-proof valve fails, electrolyte splashing may directly contact high-temperature components or short-circuit areas, causing a violent chemical reaction and releasing a large amount of heat, triggering a chain reaction of thermal runaway between adjacent cells within the module. On the other hand, leaked electrolyte can penetrate into the module's internal circuitry or the surface of adjacent cells, corroding the CCS, causing insulation failure, partial short circuits, or abnormal voltage, leading to problems such as increased cell self-discharge or malfunction. Utility Model Content

[0003] The main objective of this application is to provide a battery cell and a battery cell module to solve the problem of chain thermal runaway caused by electrolyte impact on other components when the explosion-proof valve of the battery cell fails in the prior art.

[0004] To achieve the above objectives, according to one aspect of this application, a battery cell is provided, comprising: a terminal post and an explosion-proof structure, the battery cell having a protective area that mates with a protective member, the terminal post being located within the protective area, and the protective member sealing the protective area when it is covered; the orthographic projection of the explosion-proof structure on the surface of the battery cell being located outside the outer edge of the protective area.

[0005] Furthermore, there are multiple poles, and each pole and the explosion-proof structure are arranged sequentially along the first direction, with the explosion-proof structure located on the same side of all poles.

[0006] Furthermore, the electrode includes a first electrode and a second electrode. The first electrode is disposed on the first side of the battery cell, and the explosion-proof structure and the second electrode are disposed on the second side of the battery cell. The first side and the second side are disposed opposite to each other.

[0007] According to another aspect of this application, a battery cell module is provided, comprising: the aforementioned battery cell and a protective component, wherein the battery cell has a terminal post and an explosion-proof structure; the protective component is disposed on the surface of the battery cell, a protective cavity is formed between the protective component and the battery cell, the terminal post is located inside the protective cavity, and the explosion-proof structure is located outside the protective cavity.

[0008] Furthermore, there are multiple battery cells arranged sequentially, with protective components extending along the arrangement direction of the cells and covering the terminals of the multiple cells. Furthermore, there are multiple protective components, with protective components covering both the first and second sides of the battery cells, forming multiple protective cavities between the first side and the protective component, and between the second side and the protective component, respectively. The first and second terminals of the terminals are located within different protective cavities.

[0009] Furthermore, the first terminals of two adjacent cells are located in different protective chambers.

[0010] Furthermore, the explosion-proof structures of two adjacent battery cells are located on the same side of the protective component or on opposite sides of the protective component.

[0011] Furthermore, the terminals include positive terminals and negative terminals. Along the arrangement direction perpendicular to the battery cell, the explosion-proof structure, positive terminals, and negative terminals of the battery cell are arranged in sequence. Between two adjacent battery cells, the positive terminal of one battery cell is aligned with and electrically connected to the negative terminal of the other battery cell.

[0012] Furthermore, the battery module also includes a wiring harness board assembly, which is electrically connected to the terminal post, and at least a portion of the wiring harness board assembly is located within a protective cavity.

[0013] Furthermore, along the arrangement direction of the battery cells, both ends of the protective component have mounting parts, which are engaged and fixed with the wire harness board integration component.

[0014] Furthermore, the wire harness board assembly includes a bracket, the edge of which has a mounting structure, and the mounting portion engages and is fixed with the mounting structure.

[0015] Furthermore, the extension direction of the mounting part is perpendicular to the length direction of the protective component.

[0016] Furthermore, both the protective components and the support structure are designed to be insulated.

[0017] Furthermore, the wire harness board assembly also includes a connector bar and a circuit board, both of which are housed within a protective cavity.

[0018] By applying the technical solution of this application, a protective area is provided on the surface of the battery cell, allowing the battery cell to cooperate with the protective component to protect the terminal within the protective area. This ensures that the terminal is protected from direct physical impact and chemical corrosion, thereby improving the reliability and lifespan of the battery cell. The explosion-proof structure is located outside the protective area, effectively isolating possible thermal runaway events inside the battery cell. If the internal pressure of the battery cell becomes too high, the explosion-proof structure will open, guiding the high-temperature gas and electrolyte to an area away from the terminal through a preset pressure relief path. This prevents the splashed electrolyte from directly impacting adjacent battery cells or other critical components of the battery cell, thereby reducing the risk of heat spread and improving the overall safety of the battery cell. Attached Figure Description

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

[0020] Figure 1 An exploded view of the battery cell module according to Embodiment 1 of this application is shown;

[0021] Figure 2 The front view of the wire harness board assembly and multiple battery cells according to Embodiment 1 of this application is shown;

[0022] Figure 3 It shows Figure 2 Top view;

[0023] Figure 4 An isometric view of the wire harness board assembly and multiple battery cells according to Embodiment 1 of this application is shown;

[0024] Figure 5 A schematic diagram of the structure of multiple battery cells according to Embodiment 1 of this application is shown;

[0025] Figure 6 A schematic diagram of the battery cell according to Embodiment 1 of this application is shown;

[0026] Figure 7 A schematic diagram of the protective component according to Embodiment 1 of this application is shown;

[0027] Figure 8 It shows Figure 7 Another structural diagram from a different angle;

[0028] Figure 9 A schematic diagram of the battery cell module according to Embodiment 2 of this application is shown;

[0029] Figure 10 A side view of the battery cell module according to Embodiment 2 of this application is shown;

[0030] Figure 11 A schematic diagram of the battery cell according to Embodiment 2 of this application is shown;

[0031] Figure 12 It shows Figure 11 Another structural diagram from another angle.

[0032] The above figures include the following reference numerals:

[0033] 10. Battery cell; 11. Terminal; 111. Positive terminal; 112. Negative terminal; 12. Explosion-proof structure; 20. Protective component; 21. Mounting part; 30. Wiring harness board assembly; 31. Bracket; 311. Mounting structure. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0036] In this application, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this application.

[0037] It should be noted that "multiple" in the above embodiments refers to at least two.

[0038] To address the problem of cascading thermal runaway caused by electrolyte impact on other components when the explosion-proof valve of a battery cell fails in the prior art, this application provides a battery cell and a battery cell module.

[0039] Example 1

[0040] like Figures 1 to 8 The battery cell 10 shown includes: a terminal post 11 and an explosion-proof structure 12. The battery cell has a protective area that cooperates with a protective member 20. The terminal post 11 is located within the protective area. When the protective member 20 is placed over the protective area, the protective area is closed. The orthographic projection of the explosion-proof structure 12 on the surface of the battery cell 10 is located outside the range of the outer edge of the protective area.

[0041] This embodiment provides a protective area on the surface of the battery cell 10, allowing the battery cell 10 to cooperate with the protective component 20 to protect the electrode post 11 within the protective area. This ensures that the electrode post 11 is protected from direct physical impact and chemical corrosion, thereby improving the reliability and lifespan of the battery cell 10. The explosion-proof structure 12 is located outside the protective area, effectively isolating potential thermal runaway events inside the battery cell 10. If the internal pressure of the battery cell 10 becomes too high, the explosion-proof structure 12 will open, guiding the high-temperature gas and electrolyte to an area away from the electrode post 11 through a preset pressure relief path. This prevents the splashed electrolyte from directly impacting adjacent battery cells or other critical components of the battery cell 10, thereby reducing the risk of heat spread and improving the overall safety of the battery cell 10.

[0042] This embodiment also provides a battery cell module, including: a battery cell 10 and a protective component 20. The battery cell 10 has a terminal post 11 and an explosion-proof structure 12. The protective component 20 covers the surface of the battery cell 10, and a protective cavity is formed between the protective component 20 and the battery cell 10. The terminal post 11 is located inside the protective cavity, and the explosion-proof structure 12 is located outside the protective cavity.

[0043] In this embodiment, a protective component 20 is installed on the surface of the battery cell 10, forming a protective cavity between the protective component 20 and the battery cell 10. This protects the electrode post 11 inside the protective cavity. Simultaneously, an explosion-proof structure 12 is placed outside the protective cavity to isolate the electrode post area from the explosion-proof structure area. This prevents the electrolyte splashed from the explosion-proof structure 12 from directly impacting the electrode post area inside the protective cavity when the explosion-proof structure 12 fails, thus avoiding further expansion of thermal runaway. When multiple battery cells 10 are present, the electrolyte splashed from a thermally runaway battery cell 10 can also be prevented from directly impacting the electrode post area of ​​adjacent battery cells 10, reducing the risk of short circuits and thermal runaway between adjacent battery cells 10 and preventing cascading thermal runaway. This improves the overall safety and reliability of the battery cell module.

[0044] It should be noted that in this embodiment, the pole post area refers to the pole post 11 and the area surrounding it, while the explosion-proof structure area refers to the explosion-proof structure 12 and the area surrounding it. In this embodiment, the pole post area is located inside the protective cavity, with both the pole post 11 and the wiring harness assembly 30 located within the pole post area, and the explosion-proof structure area located outside the protective cavity. Optionally, the explosion-proof structure 12 can be configured as an explosion-proof valve.

[0045] In this embodiment, there are multiple pole posts 11, and each pole post 11 and the explosion-proof structure 12 are arranged sequentially along the first direction, with the explosion-proof structure 12 located on the same side of all pole posts 11. Figure 5 As shown, the electrode post 11 in this embodiment includes a first electrode post and a second electrode post. The first electrode post, the second electrode post, and the explosion-proof structure 12 are arranged sequentially, thereby optimizing the internal structural layout of the battery cell 10, separating the explosion-proof structure 12 from the electrode post 11, reducing the impact of electrolyte splashing on the electrode post 11, and facilitating the efficient integration and management of the wire harness board integration component 30. Specifically, as Figure 5 , Figure 6As shown, in this embodiment, the first pole and the second pole are arranged adjacent to each other. The explosion-proof structure 12 is located on the side of the first pole away from the second pole, or the explosion-proof structure 12 is located on the side of the second pole away from the first pole. This makes it easy to distinguish the pole area and the explosion-proof structure area. This method of moving the explosion-proof structure 12 to one side of the cell 10 avoids the situation in the traditional cell 10 where the explosion-proof structure 12 is located in the middle of the first pole and the second pole, which would cause the pole area to be divided into two parts and make it difficult to protect the pole area as a whole. In this way, when the wire harness board integration component 30 is set for the battery cell module, the wire harness board integration component 30 does not need to consider crossing the explosion-proof structure 12 or the winding, and can be directly connected to the first and second poles. At the same time, the setting of the protective component 20 does not need to divide the protective cavity into two parts, but can directly protect the first and second poles in a complete protective cavity. This simplifies the layout of the battery cell module, improves the stability and maintenance efficiency of the battery cell module, and reduces the risk of electrolyte directly impacting the pole area after the explosion-proof structure 12 fails, avoiding electrolyte splashing that could impact and corrode the poles 11 and the wire harness board integration component 30 in the pole area. Of course, depending on the actual situation, the poles 11 can include more, such as the third pole, the fourth pole, etc. The first pole, the second pole, the third pole, the fourth pole, and the explosion-proof structure 12 are arranged in sequence. When the number of poles 11 is set to other numbers, it is still necessary to ensure that the poles 11 and the explosion-proof structure 12 are arranged in sequence.

[0046] In this embodiment, there are multiple battery cells 10 arranged sequentially. A protective member 20 extends along the arrangement direction of the battery cells 10 and covers the terminals 11 of the multiple battery cells 10. This continuous protective member 20 covers the entire terminal area of ​​the battery cell module, forming a unified protective barrier that effectively prevents the lateral propagation of electrolyte between the multiple battery cells 10 and prevents cascading thermal runaway. Specifically, in this embodiment, the arrangement direction of the first terminal, the second terminal, and the explosion-proof structure 12 is the first direction. The arrangement direction of the battery cells 10 is perpendicular to the first direction, and the extension direction of the protective member 20 is also perpendicular to the first direction, thus forming a protective cavity extending perpendicular to the first direction. This allows the terminals 11 of each battery cell 10 to be located within the protective cavity, enabling the protective member 20 to provide overall protection for the terminals 11 of the multiple battery cells 10, thereby enhancing the overall protection capability of the battery cell module.

[0047] In this embodiment, the explosion-proof structure 12 of two adjacent cells 10 is located on the same side of the protective member 20 or on opposite sides of the protective member 20. By rationally planning the position of the explosion-proof valve, the electrolyte is prevented from being sprayed directly onto the adjacent cells 10 when a single cell 10 thermally runs away, thereby reducing the spread speed and range of thermal runaway.

[0048] Specifically, the explosion-proof structures 12 of two adjacent battery cells 10 can be located on the same side of the protective member 20, that is, along the arrangement direction of the battery cells 10, the terminals 11 of each battery cell 10 are aligned, so that the explosion-proof structures 12 located on one side of the terminals 11 can also be aligned. Alternatively, the explosion-proof structures 12 of two adjacent battery cells 10 can be located on opposite sides of the protective member 20, such as... Figure 3 , Figure 4 As shown, this embodiment adopts this configuration. In this embodiment, two adjacent battery cells 10 are not placed in the same direction, but are placed 180° apart. However, the planes on which the terminals 11 of the two adjacent battery cells 10 are located are coplanar. The terminals 11 and the explosion-proof structure 12 can be set to be located on the upper surface of the battery cell 10, with the terminals 11 located at the center of the upper surface. This ensures that the terminals 11 of the two adjacent battery cells 10 are aligned even after the battery cell 10 is rotated 180°. This allows the protective component 20 to protect the terminals 11 of each battery cell 10 within the protective cavity. Due to the 180° difference, the explosion-proof structures 12 of the two adjacent battery cells 10 can be located on opposite sides of the protective component 20. Thus, when the explosion-proof structure 12 of one battery cell 10 fails, causing electrolyte splashing, it will not affect the terminals 11 and other components in the protective cavity, nor will it affect the explosion-proof structures 12 of the adjacent battery cells 10. This further reduces the risk of cascading thermal runaway of the battery cell module and improves the overall safety of the battery cell module.

[0049] In this embodiment, the electrode post 11 includes a positive electrode post 111 and a negative electrode post 112. Along the arrangement direction perpendicular to the battery cell 10, the explosion-proof structure 12, the positive electrode post 111, and the negative electrode post 112 of the battery cell 10 are arranged in sequence. Between two adjacent battery cells 10, the positive electrode post 111 of one battery cell 10 is aligned with the negative electrode post 112 of the other battery cell 10 and electrically connected. On the one hand, this can optimize the electrical connection between the battery cells 10, ensure the smoothness of the current path, increase the spatial layout flexibility of the battery cell module, and facilitate the integration of components such as the wire harness board assemblies 30 and sensors. On the other hand, the position arrangement of the explosion-proof structure 12 avoids the impact of electrolyte splashing on the electrical connection points. Specifically, in this embodiment, the explosion-proof structure 12 is arranged adjacent to the positive terminal 111. Since the adjacent cells 10 are arranged at a 180° angle, the positive terminal 111 can be aligned with the negative terminal 112 of the adjacent cell 10 along the arrangement direction of the cells 10. The explosion-proof structure 12 can be alternately distributed on both sides of the protective plate, so that when the connecting plate assembly is electrically connected to the terminal 11, the connection path between the positive terminal 111 and the negative terminal 112 can be shortened, thereby facilitating the arrangement of the connecting plate assembly, improving the electrical performance and stability of the cell module, and reducing electrical faults caused by electrolyte splashing.

[0050] In this embodiment, the battery cell module further includes a wiring harness board integration component 30, which is electrically connected to the terminal post 11. At least a portion of the wiring harness board integration component 30 is located within a protective cavity. By placing the wiring harness board integration component 30 within the protective cavity, the protective cavity formed by the protective component 20 protects the wiring harness board integration component 30 from interference from the electrolyte and external environmental factors, particularly avoiding direct contact with the electrolyte. This reduces the risk of thermal runaway in the battery cell module and improves the insulation performance and corrosion resistance of the wiring harness board integration component 30, extending its service life. Specifically, in this embodiment, the wiring harness board integration component 30 extends along the arrangement direction of the battery cells 10, thereby integrating multiple battery cells 10 into a battery cell module. The wire harness board assembly 30 includes conductive components such as connecting bars and circuit boards. All conductive components of the wire harness board assembly 30 are located inside the protective cavity, thereby avoiding direct impact of electrolyte on the conductive components and preventing the explosion-proof structure 12 from splashing electrolyte onto the conductive components, which could lead to a chain thermal runaway of the battery cell 10 or corrosion of the conductive components.

[0051] In this embodiment, the protective member 20 protrudes from the surface of the battery cell 10, such as... Figure 1 As shown, in this embodiment, the protective component 20 is disposed on the upper surface of the battery cell 10, and the protective component 20 is located above the upper surface of the battery cell 10. This allows for the independent planning of a thermal runaway pressure relief zone for the explosion-proof structure 12 located on one side of the protective component 20, thus confining the thermal runaway pressure relief zone within the explosion-proof structure area. In this way, when the explosion-proof structure 12 splashes electrolyte, the electrolyte is unlikely to exceed the height of the protective component and flow to the other side of the protective component 20. This controls the damage range of the electrolyte within the explosion-proof structure area of ​​the faulty battery cell 10, preventing the high-temperature splashed electrolyte from directly impacting adjacent battery cells 10 or wire harness board integration components 30, reducing the risk of thermal spread, and further improving the safety and reliability of the battery cell module.

[0052] like Figure 7 , Figure 8 As shown, in this embodiment, along the arrangement direction of the battery cells 10, both ends of the protective member 20 have mounting portions 21. The mounting portions 21 are engaged and fixed with the wire harness plate integrated member 30. This engagement and fixation ensures the stability and positioning accuracy of the protective member 20 in the arrangement direction of the battery cells 10, preventing displacement due to vibration during transportation or use and thus maintaining the protective effect. Specifically, the protective member 20 and the wire harness plate integrated member 30 extend in the same direction. The wire harness plate integrated member 30 is fixed to the upper surface of the battery cells 10, and the protective member 20 covers the upper surface of the battery cells 10, allowing the wire harness plate integrated member 30 to be located within the protective cavity. Along the arrangement direction of the battery cells 10, the edge of the wire harness plate integrated member 30 is fixed to the two battery cells 10 located at both ends of the battery cell module, while the protective plate is fixed to the edge of the wire harness plate integrated member 30. This improves the installation stability of the protective member 20 and the structural integrity of the entire battery cell module.

[0053] like Figure 2 , Figure 3 As shown, in this embodiment, the wire harness board assembly 30 includes a bracket 31. The edge of the bracket 31 has a mounting structure 311, and the mounting part 21 engages and is fixed with the mounting structure 311. Specifically, the protective member 20 in this embodiment is used in conjunction with the bracket 31. The protective member 20 is configured as a rectangular cover-like structure, that is, it has protrusions protruding towards the battery cell 10 on the four edges of a rectangular plate-like structure, namely two long side protrusions and two short side protrusions, thereby forming a rectangular protective cavity. The two short side protrusions are the mounting parts 21. The bracket 31 serves as a supporting structure for the wire harness board assembly 30, playing a supporting and protective role. The bracket 31 also extends along the arrangement direction of the battery cell 10 and has mounting structures 311 at both ends. The short side protrusions are configured as a U-shaped structure, that is, the two sides protrude and the middle is recessed. The mounting structure 311 is configured as a block structure. When the mounting structure 311 is engaged with the mounting part 21, the mounting structure 311 is located in the middle recessed position of the short side protrusion, thereby achieving a snap-fit ​​fixation and forming a stable connection between the wire harness board integrated component 30 and the protective component 20. At the same time, a closed protective cavity is formed to prevent electrolyte from flowing into the protective cavity, thereby improving the structural strength and protective performance of the wire harness board integrated component 30 and reducing damage caused by external impact or vibration.

[0054] In this embodiment, the extension direction of the mounting portion 21 is perpendicular to the length direction of the protective member 20. This vertically extending mounting portion 21 ensures the protective member 20 is firmly fixed in the cell arrangement direction. Simultaneously, optimized spatial layout reduces the space occupied within the battery, improving space utilization. Specifically, the mounting portion 21 and the mounting structure 311 in this embodiment do not occupy the space on the upper surface of the cell 10, but are instead located on the side of the cell 10. This not only enhances the fixing strength of the protective member 20 but also optimizes the internal structural layout of the battery, improving overall compactness and efficiency.

[0055] In this embodiment, both the protective component 20 and the bracket 31 are configured as insulators to avoid the risk of electrical short circuits. Furthermore, the insulating material typically possesses good corrosion resistance and high-temperature resistance, further enhancing the overall protection level of the battery cell module. In this embodiment, the protective component 20 is made of polypropylene, and the bracket 31 is made of plastic, thereby improving the electrical safety and environmental interference resistance of the battery cell module and reducing maintenance costs.

[0056] In this embodiment, the wire harness board assembly 30 also includes a connecting busbar and a circuit board, both of which are disposed within a protective cavity. This utilizes the enclosed protective cavity of the protective component 20 to protect these critical electrical components from external environmental factors, particularly preventing electrolyte corrosion. Specifically, in this embodiment, except for the two ends of the bracket 31 that mate with the mounting portion 21, the rest of the wire harness board assembly 30 is located within the protective cavity. This improves the insulation performance and corrosion resistance of the connecting busbar and the circuit board, extending their service life. The connecting busbar can be made of aluminum or copper, etc., as long as it meets the requirements of the battery cell module. The circuit board can be a single, complete board, providing a carrier for electrical connections between multiple battery cells 10.

[0057] The battery cell module of this embodiment not only effectively solves the problem of impact and corrosion of the wire harness board integrated component 30 caused by the splashing of electrolyte from the failure of the explosion-proof valve of the battery cell 10, but also isolates the explosion-proof structure area from the electrode area, avoiding impact and corrosion on the wire harness board integrated component 30. This reduces the impact of electrolyte on the electrode 11 and wire harness board integrated component 30, thus reducing the risk of electrolyte splashing and effectively controlling the risk. It also improves the spatial layout flexibility and overall performance of the battery cell module, enhancing the convenience of maintenance. Furthermore, by rationally planning the positions of the explosion-proof structure 12 and the electrode 11, when the explosion-proof structure 12 fails, direct impact on the wire harness board integrated component 30 can be effectively avoided. Simultaneously, a protective component 20 is installed above the wire harness board integrated component 30 for physical isolation, separating the explosion-proof structure area from the electrode area, limiting the diffusion range of splashed electrolyte, and reducing the contamination risk of adjacent battery cells 10. This achieves comprehensive protection for the battery cell module and improves its overall safety and reliability.

[0058] Example 2

[0059] Unlike Embodiment 1, the arrangement of the electrode post 11 and the explosion-proof structure 12 in this embodiment is different. In Embodiment 1, the first electrode post, the second electrode post, and the explosion-proof structure 12 are all disposed on the same surface of the battery cell. However, in this embodiment, the explosion-proof structure 12 and the second electrode post are located on one side of the battery cell 10, and the first electrode post is located on the other side of the battery cell 10. By distributing the first electrode post and the second electrode post on two opposite sides of the battery cell 10, this embodiment divides the protected area of ​​the battery cell 10 into two parts: the protected area of ​​the first electrode post and the protected area of ​​the second electrode post.

[0060] like Figures 9 to 12As shown, in this embodiment, the electrode 11 includes a first electrode and a second electrode. The first electrode is disposed on a first side of the battery cell 10, and the explosion-proof structure 12 and the second electrode are disposed on a second side of the battery cell 10. The first and second sides are arranged opposite to each other, thereby disposing the first electrode and the second electrode on different surfaces of the battery cell 10, thus achieving separate protection for the first electrode and the second electrode. Specifically, as... Figure 9 As shown, in this embodiment, the first and second poles are disposed opposite to each other on the first and second sides of the battery cell 10, so that the protective area of ​​the battery cell 10 has a protective area of ​​the first pole and a protective area of ​​the second pole. The protective area of ​​the first pole is located on the first side, and the protective area of ​​the second pole is located on the second side, so that the first and second poles can be effectively protected respectively. At the same time, the first pole is further away from the explosion-proof structure 12 compared to the second pole, thereby further improving the safety of the first pole. Of course, depending on the actual situation, the positions of the first and second poles in this embodiment can be interchanged to ensure that the pole 11 can be placed within the protective area and effectively protected.

[0061] like Figure 9 As shown, in this embodiment, there are multiple protective components 20. Protective components 20 are provided on both the first and second sides of the battery cell 10, forming multiple protective cavities between the first side and the protective component 20, and between the second side and the protective component 20. The first and second terminals of the electrode 11 are located in different protective cavities, thereby achieving separate protection for the first and second terminals. Specifically, this embodiment provides two protective components 20, forming two independent protective cavities between the protective component 20 and the battery cell 10, allowing the first and second terminals to be located in different protective cavities, thus achieving effective protection for the electrode 11.

[0062] Preferably, both the first and second terminals are positioned in the middle of their respective surfaces. This ensures that when multiple cells are aligned in the same direction, the first and second terminals can be aligned along the cell arrangement direction. More importantly, in the cell module, when two adjacent cells 10 are rotated 180°, i.e., when the first terminal of a cell 10 faces upward, the first terminal of its adjacent cell 10 faces downward. This facilitates the connection of the wire harness board assembly 30 to the first and second terminals of the cell 10, shortens the connection path, and simplifies the structure of the cell module.

[0063] In this embodiment, the first terminals of two adjacent battery cells 10 are located in different protective cavities, i.e., the two adjacent battery cells 10 are rotated 180° apart. These two adjacent battery cells 10 are referred to as the first battery cell and the second battery cell. The first terminal of the first battery cell and the second terminal of the second battery cell are coplanar, and the second terminal of the first battery cell and the first terminal of the second battery cell are also coplanar. This achieves effective protection of the terminals 11 and facilitates electrical connection between different battery cells 10 by the wiring harness assembly 30. Specifically, in this embodiment, protective members 20 are provided on both opposite surfaces of the battery cell module, resulting in two oppositely arranged protective cavities. This allows both the first terminal on the first side and the second terminal on the second side of each battery cell 10 to be protected within the protective cavities simultaneously. Correspondingly, two wiring harness assemblies 30 are also provided, each disposed within one of the two protective cavities. In this embodiment, the arrangement direction of the second pole and the explosion-proof structure 12 is perpendicular to the arrangement direction of the battery cell 10. Therefore, the arrangement direction of the second pole and the explosion-proof structure 12 can also be perpendicular to the extension direction of the protective member 20. This allows the protective member 20 to protect the pole 11 while keeping the explosion-proof structure 12 outside the protective cavity.

[0064] In this embodiment, the first terminal is the positive terminal 111, and the second terminal is the negative terminal 112, as follows: Figure 11 , Figure 12 As shown, the explosion-proof structure 12 and the negative terminal 112 are disposed on the second side, and the positive terminal 111 is disposed on the first side. Depending on the actual situation, the explosion-proof structure 12 and the positive terminal 111 can also be disposed on the first side, and the negative terminal 112 on the second side. It should be noted that "multiple" in the above embodiments refers to at least two.

[0065] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0066] 1. This solves the problem of chain thermal runaway caused by electrolyte impact on other components when the explosion-proof valve of the battery cell fails in the existing technology;

[0067] 2. By setting a protective cover on the surface of the battery cell, a protective cavity can be formed between the protective cover and the battery cell, thereby protecting the electrode post inside the protective cavity. At the same time, the explosion-proof structure is set outside the protective cavity to isolate the electrode post area and the explosion-proof structure area. This ensures that when the explosion-proof structure of the battery cell fails, the electrolyte splashed out by the explosion-proof structure will not directly impact the electrode post area inside the protective cavity, thus avoiding further expansion of thermal runaway.

[0068] 3. When multiple cells are present, it can prevent the electrolyte splashed from a thermally runaway cell from directly impacting the terminal area of ​​adjacent cells, thereby reducing the risk of short circuits and thermal runaway between adjacent cells, avoiding the occurrence of cascading thermal runaway, and thus improving the overall safety and reliability of the cell module.

[0069] Obviously, the embodiments described above are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort should fall within the scope of protection of this application.

[0070] 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.

[0071] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0072] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery cell, characterized in that, include: The electrode post (11) and the battery cell (10) have a protective area that cooperates with the protective member (20). The electrode post (11) is located within the protective area, and the protective member (20) closes the protective area when it is covered. An explosion-proof structure (12) is provided, wherein the orthographic projection of the explosion-proof structure (12) onto the surface of the cell (10) is located outside the range of the outer edge of the protected area.

2. The battery cell according to claim 1, characterized in that, There are multiple pole posts (11), and each pole post (11) and the explosion-proof structure (12) are arranged sequentially along the first direction, with the explosion-proof structure (12) located on the same side of all the pole posts (11).

3. The battery cell according to claim 1, characterized in that, The pole (11) includes a first pole and a second pole. The first pole is disposed on the first side of the battery cell (10), and the explosion-proof structure (12) and the second pole are disposed on the second side of the battery cell (10). The first side and the second side are disposed opposite to each other.

4. A battery cell module, characterized in that, include: The battery cell (10) according to any one of claims 1 to 3, the battery cell (10) having a terminal (11) and an explosion-proof structure (12); The protective component (20) is covered on the surface of the battery cell (10), and a protective cavity is formed between the protective component (20) and the battery cell (10). The pole post (11) is located inside the protective cavity, and the explosion-proof structure (12) is located outside the protective cavity.

5. The cell module according to claim 4, characterized in that, There are multiple battery cells (10), and each battery cell (10) is arranged in sequence. The protective member (20) extends along the arrangement direction of the battery cells (10) and covers the terminals (11) of the multiple battery cells (10).

6. The cell module according to claim 5, characterized in that, There are multiple protective components (20). The first side and the second side of the battery cell (10) are covered with the protective components (20), and multiple protective cavities are formed between the first side and the protective components (20) and between the second side and the protective components (20). The first pole and the second pole of the pole (11) are located in different protective cavities.

7. The cell module according to claim 5, characterized in that, The first terminals of two adjacent cells (10) are located in different protective cavities.

8. The battery cell module according to claim 5, characterized in that, The explosion-proof structures (12) of two adjacent cells (10) are located on the same side of the protective member (20) or on opposite sides of the protective member (20).

9. The cell module according to claim 5, characterized in that, The electrode (11) includes a positive electrode (111) and a negative electrode (112). Along the arrangement direction perpendicular to the battery cell (10), the explosion-proof structure (12), the positive electrode (111), and the negative electrode (112) of the battery cell (10) are arranged in sequence. Between two adjacent battery cells (10), the positive electrode (111) of one battery cell (10) and the negative electrode (112) of the other battery cell (10) are aligned and electrically connected.

10. The cell module according to claim 4, characterized in that, The battery module also includes a wire harness board assembly (30), which is electrically connected to the terminal post (11), and at least a portion of the wire harness board assembly (30) is located within the protective cavity.

11. The cell module according to claim 10, characterized in that, Along the arrangement direction of the battery cells (10), both ends of the protective member (20) have mounting portions (21), which are engaged and fixed with the wire harness board assembly (30).

12. The cell module according to claim 11, characterized in that, The wire harness board assembly (30) includes a bracket (31), the edge of which has a mounting structure (311), and the mounting part (21) engages and is fixed with the mounting structure (311).

13. The cell module according to claim 11, characterized in that, The extension direction of the mounting part (21) is perpendicular to the length direction of the protective member (20).

14. The cell module according to claim 12, characterized in that, Both the protective component (20) and the bracket (31) are configured as insulating components.

15. The cell module according to claim 10, characterized in that, The wire harness board assembly (30) also includes a connecting bar and a circuit board, both of which are disposed within the protective cavity.

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