Battery module, battery pack and electric equipment

Abstract

The utility model relates to a battery module, a battery pack and electric equipment, the battery module comprises a battery cell group, two end plates and two insulating plates, and the battery cell group comprises a plurality of battery cells; the two end plates are respectively arranged at the two ends of the battery cell group; the two insulating plates are respectively arranged corresponding to the two end plates, each insulating plate comprises a plate body and a folding edge, the plate body is clamped between the end plates and the battery cell group and is fixedly connected with the adjacent battery cell or end plate, and the folding edge is bent towards the battery cell group and is positioned on the outer side of the battery cell group. Through the design that the insulating plates are provided with the folded edges, the insulating plates not only cover the contact surfaces between the battery cells and the end plates, but also extend to the outer side of the battery cell group, so that the creepage distance is greatly increased; according to the battery module provided by the invention, the plate body is fixedly connected with the adjacent battery cell or end plate, so that when the battery module is subjected to external impact or vibration, the insulating plate can be kept at a correct position and continuously plays an insulating role, thereby optimizing the insulating performance between the end plate and the battery cell and improving the safety and reliability of the battery module.

Description

Technical Field

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

[0002] In related technologies, insulation between the battery cell and the end plate is achieved through a blue film on the cell surface. However, as voltage levels increase, the insulation requirements between the cell and the end plate also rise. The insulation performance of the blue film is no longer sufficient to meet these requirements. Therefore, some battery module products have begun to add sheet-like insulating sheets between the end plate and the cell to enhance insulation and ensure the safety and reliability of the battery module. However, when the design voltage of the battery module increases further, simply adding sheet-like insulating sheets is still insufficient to meet the creepage distance requirements between the cell and the end plate, and thus fails to satisfy the insulation requirements. Utility Model Content

[0003] This application provides a battery module, battery pack, and electrical equipment, which optimizes the insulation performance between the end plate and the battery cell, and improves the safety and reliability of the battery module, thereby at least partially solving the above-mentioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, a battery module is provided, comprising:

[0005] A battery cell assembly includes multiple battery cells arranged along a first direction;

[0006] Two end plates are respectively disposed at both ends of the battery cell assembly in the first direction; and,

[0007] Two insulating plates are respectively provided for the two end plates. Each insulating plate includes a plate body and a folded edge connected to the plate body. The plate body is sandwiched between the end plate and the cell group and is fixedly connected to the adjacent cell or the end plate. The folded edge is bent toward the cell group and located on the outside of the cell group.

[0008] Optionally, the folded edge includes two opposing first parts and a second part connected between the two first parts.

[0009] Optionally, the folded edge is arranged in a ring shape and surrounds the outer periphery of the battery cell assembly.

[0010] Optionally, the folded edge has a notch, which is used to avoid the electrode post of the adjacent battery cell.

[0011] Optionally, the folded edge has a dimension of 2 mm or more in the first direction.

[0012] Optionally, the plate body is bonded to the adjacent battery cell.

[0013] Optionally, the plate body has two spaced-apart first limiting blocks protruding from one side facing the battery cell assembly, and the battery module includes a first colloid disposed between the two first limiting blocks.

[0014] Optionally, the plate body is bonded to the adjacent end plate.

[0015] Optionally, the plate body has two spaced second limiting blocks protruding from the side opposite to the cell assembly, and the battery module includes a second colloid disposed between the two second limiting blocks.

[0016] Optionally, the insulating plate further includes reinforcing ribs that protrude from the side of the folded edge away from the battery cell assembly.

[0017] Optionally, the end plate has a limiting groove on the side opposite to the battery cell assembly;

[0018] The battery module also includes a ring clamp, which is disposed outside the two end plates, the two insulating plates, and the battery cell assembly, and a portion of the ring clamp is located in the limiting groove.

[0019] According to a second aspect of this application, a battery module is provided, comprising:

[0020] A battery cell assembly includes multiple battery cells arranged along a first direction;

[0021] Two end plates are respectively disposed at both ends of the battery cell assembly in the first direction; and,

[0022] Two insulating plates are respectively provided for the two end plates. Each insulating plate includes a plate body and a folded edge connected to the plate body. The plate body is sandwiched between the end plate and the cell assembly and is fixedly connected to the adjacent cell or the end plate. The folded edge is bent toward the adjacent end plate and located on the outside of the end plate.

[0023] According to a third aspect of this application, a battery pack is provided, comprising:

[0024] Box; and,

[0025] The battery module as described in any of the preceding claims is disposed within the housing.

[0026] Optionally, the housing includes a bottom protective plate, and the bottom protective plate has an insulating layer on the side facing the battery pack;

[0027] The plate body and the folded edge are adjacent to the insulating layer.

[0028] According to a fourth aspect of this application, an electrical device is provided, including a battery module as described in any of the preceding claims, or a battery pack as described in any of the preceding claims.

[0029] In the battery module of this application embodiment, the insulating plate has a folded edge design, which not only covers the contact surface between the cell and the end plate, but also extends to the outside of the cell assembly, greatly increasing the creepage distance. The plate body is fixedly connected to the adjacent cell or end plate, ensuring that the insulating plate can remain in the correct position and continue to perform its insulating function when the battery module is subjected to external impact or vibration, thereby optimizing the insulation performance between the end plate and the cell and improving the safety and reliability of the battery module.

[0030] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0033] Figure 1 This is a three-dimensional structural schematic diagram of the battery module provided in an exemplary embodiment of this disclosure;

[0034] Figure 2 yes Figure 1 An exploded view of the battery module structure;

[0035] Figure 3 yes Figure 2 A three-dimensional schematic diagram of the insulating plate structure in the diagram;

[0036] Figure 4 yes Figure 3 A three-dimensional structural diagram of the insulating plate from another perspective;

[0037] Figure 5 yes Figure 2 A three-dimensional structural diagram of the end plate in the middle;

[0038] Figure 6 This is an exploded view of the structure of a battery pack provided in an exemplary embodiment of this disclosure.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1000, Battery Pack; 100, Battery Module; 1, Cell Assembly; 11, Cell; 2, End Plate; 21, Limiting Groove; 3, Insulating Plate; 31, Plate Body; 311, First Limiting Block; 312, Second Limiting Block; 32, Folded Edge; 321, First Part; 322, Second Part; 323, Notch; 33, Reinforcing Rib; 4, First Glue; 5, Second Glue; 6, Ring Hoop; 7, Heat Insulation Pad; 8, CCS Module; 200, Bottom Protective Plate; 210, Insulating Layer. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0042] This application provides a battery module, a battery pack, and an electrical device. Please refer to the accompanying drawings. Figures 1 to 5 This is a schematic diagram of the battery module provided in an embodiment of this application.

[0043] See Figure 1 and Figure 2 The battery module 100 includes a cell assembly 1, two end plates 2, and two insulating plates 3.

[0044] The battery cell pack 1 includes multiple battery cells 11 arranged along a first direction. The multiple battery cells 11 are connected in series or in parallel to adjust the voltage and capacity of the battery module 100 to meet the needs of different application scenarios.

[0045] Two end plates 2 are respectively located at both ends of the cell assembly 1 in the first direction. The main function of the end plates 2 is to fix and support the cell assembly 1, ensuring that the cell assembly 1 is in a stable position in the battery module 100. In addition, the end plates 2 can also provide structural rigidity, protect the cell 11 from external impacts and vibrations, and improve the mechanical strength and safety of the battery module 100.

[0046] Two insulating plates 3 are respectively installed corresponding to the two end plates 2, see Figure 3 and Figure 4Each insulating plate 3 includes a plate body 31 and a folded edge 32 connected to the plate body 31. The plate body 31 is sandwiched between the end plate 2 and the cell assembly 1, and is fixedly connected to the adjacent cell 11 or end plate 2. The folded edge 32 is bent towards the cell assembly 1 and located on the outside of the cell assembly 1. The plate body 31 of the insulating plate 3 covers the contact surface between the cell 11 and the end plate 2, while the folded edge 32 design extends the insulating plate 3 to the outside of the cell assembly 1, significantly increasing the creepage distance. This effectively prevents current from being conducted from the end plate 2 to the cell 11 through air or other media, significantly improving the insulation performance between the cell 11 and the end plate 2. The plate body 31 of the insulating plate 3 is fixedly connected to the adjacent cell 11 or end plate 2, ensuring that the insulating plate 3 can remain in the correct position when the battery module 100 is subjected to external impact or vibration, and will not easily shift or fall off, improving the installation stability of the insulating plate 3 and ensuring that the insulating plate 3 continues to perform its insulation function.

[0047] In the technical solution of this application, the insulating plate 3 has a folded edge 32, which not only covers the contact surface between the cell 11 and the end plate 2, but also extends to the outside of the cell assembly 1, greatly increasing the creepage distance; the plate body 31 is fixedly connected to the adjacent cell 11 or end plate 2, ensuring that when the battery module 100 is subjected to external impact or vibration, the insulating plate 3 can remain in the correct position and continue to perform its insulation function, thereby optimizing the insulation performance between the end plate 2 and the cell 11 and improving the safety and reliability of the battery module 100.

[0048] This application does not limit the manufacturing process of the insulating board 3. The insulating board 3 can be made by injection molding or by die cutting and folding process 32.

[0049] This application does not limit the coverage area of ​​the folded edge 32, see Figure 4 In some embodiments, the folded edge 32 includes two opposing first portions 321 and a second portion 322 connected between the two first portions 321. In these embodiments, the folded edge 32, comprising two opposing first portions 321 and a second portion 322 connected between the two first portions 321, forms a semi-enclosed structure, which can more comprehensively cover the outer side of the cell assembly 1, further increasing the creepage distance and improving insulation performance. The two opposing first portions 321 can better fit the sides of the cell assembly 1, while the second portion 322 provides additional support and protection, ensuring that the insulating plate 3 is more stable when subjected to external impacts, ensuring that the insulating plate 3 continues to perform its insulating function, further optimizing the insulation performance between the end plate 2 and the cell 11, and improving the safety and reliability of the battery module 100.

[0050] In some embodiments, the folded edge 32 is annular and surrounds the outer periphery of the cell assembly 1. In these embodiments, the annular folded edge 32, surrounding the outer periphery of the cell assembly 1, can fully cover the circumference of the cell assembly 1, further increasing the creepage distance and improving insulation. The annular folded edge 32 design also provides additional structural support, making the insulation plate 3 more stable when subjected to external impacts, reducing the risk of insulation failure due to vibration or impact, thereby improving the safety and reliability of the battery module 100. Specifically, the annular folded edge 32 can be adjusted according to the specific size and shape of the cell assembly 1 to ensure that the insulation plate 3 can fit tightly against the outer periphery of the cell assembly 1, adapting to different types of battery module 100 designs. Furthermore, it is understood that the annular folded edge 32 design makes the insulation plate 3 easier to position and fix during installation, simplifying the installation process and improving production efficiency.

[0051] In some embodiments, see Figure 2 and Figure 3 The folded edge 32 has a notch 323, which is used to avoid the electrode posts of adjacent cells 11. In these embodiments, the folded edge 32 of the insulating plate 3 has a notch 323, which is used to avoid the electrode posts of adjacent cells 11. This design can ensure that the insulating plate 3 provides insulation protection without hindering the normal function of the electrode posts of the cells 11. The presence of the notch 323 allows the insulating plate 3 to adapt to the specific structure of the cell assembly 1, avoid interference with the electrode posts, and thus ensure the normal operation of the battery module 100.

[0052] In some embodiments, the folded edge 32 has a dimension greater than or equal to 2 mm in the first direction. In these embodiments, the folded edge 32 has a dimension greater than or equal to 2 mm in the first direction to ensure that the folded edge 32 has sufficient coverage, thereby increasing the creepage distance, improving insulation performance, and ensuring reliable insulation protection under different operating conditions.

[0053] Understandably, the insulating plate 3 has a folded edge 32. Through the structural design of the folded edge 32 (such as including two opposing first parts 321 and a second part 322 connected between the two first parts 321), the folded edge 32 has a unique spatial shape, which can form an effective holding structure for the adjacent battery cell 11 to be embedded, thereby achieving a fixed connection through interference fit.

[0054] In some embodiments, the plate body 31 is bonded to the adjacent battery cell 11. In these embodiments, the bonding operation is relatively simple and does not require additional connectors or complex installation steps, thereby improving production efficiency. Through bonding, the insulating plate 3 can better fit onto the surface of the battery cell 11, reducing air gaps and thus improving the insulation effect.

[0055] In some embodiments, see Figure 4The plate body 31 has two spaced first limiting blocks 311 protruding from the side facing the cell assembly 1. The battery module 100 includes a first gel 4 ( Figure 4 The diagram shows two first adhesive bodies 4 and two sets of first limiting blocks 311, with the first adhesive bodies 4 positioned between the two first limiting blocks 311. In these embodiments, the first limiting blocks 311 serve as a positioning aid structure. When installing the first adhesive bodies 4, the operator can accurately place them based on the position of the first limiting blocks 311, improving the accuracy and efficiency of assembly. Specifically, the first adhesive body 4 is double-sided adhesive. It is understood that double-sided adhesive has a certain degree of elasticity, which can play a role in shock absorption and buffering between the battery cell 11 and the insulating plate 3. This is crucial for protecting the battery module 100 from vibration and impact, and can extend the service life of the battery module 100.

[0056] In some embodiments, the plate body 31 is bonded to the adjacent end plate 2. In these embodiments, the bonding operation is relatively simple, requiring no additional connectors or complex installation steps, thereby improving production efficiency. Through bonding, the insulating plate 3 can better fit onto the surface of the end plate 2, reducing air gaps and thus improving the insulation effect.

[0057] In some embodiments, the plate body 31 is bonded to the adjacent cell 11 and the plate body 31 is bonded to the adjacent end plate 2. In these embodiments, through bonding, the insulating plate 3, the cell 11 and the end plate 2 form an integral structure, which enhances the stability of the battery module 100. When the battery module 100 is subjected to external impact or vibration, this bonding method can effectively prevent relative displacement between the insulating plate 3 and the cell 11 or the end plate 2, thereby ensuring insulation performance and improving the safety and reliability of the battery module 100.

[0058] In some embodiments, see Figure 3 The plate body 31 has two spaced-apart second limiting blocks 312 protruding from the side opposite to the cell assembly 1. The battery module 100 includes a second adhesive 5, which is disposed between the two second limiting blocks 312. In these embodiments, the second limiting blocks 312 serve as a positioning aid structure. When installing the second adhesive 5, the operator can accurately place the second adhesive 5 based on the position of the second limiting blocks 312, improving the accuracy and efficiency of assembly. Specifically, the second adhesive 5 is double-sided adhesive.

[0059] In some embodiments, see Figure 3 and Figure 4The insulating plate 3 also includes reinforcing ribs 33, which protrude from the side of the folded edge 32 away from the cell assembly 1. In these embodiments, the reinforcing ribs 33 improve the overall structural strength of the insulating plate 3, enabling it to better withstand external pressure and stress. During the use of the battery module 100, this enhanced structural strength can prevent the insulating plate 3 from deforming or being damaged, thereby protecting the integrity and safety of the battery module 100.

[0060] In some embodiments, see Figure 1 and Figure 5 The end plate 2 has a limiting groove 21 on the side opposite to the cell assembly 1; the battery module 100 also includes a ring 6 (two rings 6 are shown in the figure), which is clamped outside the two end plates 2, the two insulating plates 3, and the cell assembly 1, with a portion of the ring 6 located in the limiting groove 21. In these embodiments, the ring 6 in the battery module 100 is clamped outside the two end plates 2, the two insulating plates 3, and the cell assembly 1, forming an integral constraint structure that can apply inward pressure to the cell assembly 1, the insulating plates 3, and the end plates 2, making them fit tightly together, while the portion of the ring 6 is located in the limiting groove 21, further restricting the displacement of the ring 6. Figure 1 and Figure 5 The vertical positioning of the limiting groove 21 enhances the stability of the entire battery module 100 structure. When the battery module 100 is subjected to vibration, impact, or during transportation, this structure effectively prevents relative displacement between components, maintaining the integrity of the battery module 100. Understandably, the limiting groove 21 provides a precise positioning point for the ring clamp 6. During the assembly of the battery module 100, operators can accurately place the ring clamp 6 according to the position of the limiting groove 21, improving assembly efficiency and accuracy.

[0061] In some embodiments, see Figure 2 The battery module 100 also includes a heat insulation pad 7, which is disposed between two adjacent battery cells 11. The heat insulation pad 7 can effectively suppress heat diffusion, delay the occurrence of accidents, and improve the safety of the battery module 100 in the event of thermal runaway of the battery cell 11.

[0062] In some embodiments, the battery module 100 further includes a CCS component 8, which is disposed on the side of the cell assembly 1 where the electrode posts are provided, and is connected to the electrodes of the cell 11 by welding or other connection methods to realize the electrical connection between the cells 11.

[0063] According to a second aspect of this application, a battery module 100 is provided, including a cell assembly 1, two end plates 2, and two insulating plates 3. The cell assembly 1 includes a plurality of cells 11 arranged along a first direction. The two end plates 2 are respectively disposed at both ends of the cell assembly 1 in the first direction. The two insulating plates 3 are respectively disposed corresponding to the two end plates 2. Each insulating plate 3 includes a plate body 31 and a folded edge 32 connected to the plate body 31. The plate body 31 is sandwiched between the end plate 2 and the cell assembly 1 and is fixedly connected to the adjacent cell 11 or end plate 2. The folded edge 32 is bent toward the adjacent end plate 2 and located on the outside of the end plate 2. In these embodiments, the folded edge 32 is bent toward the adjacent end plate 2 and located on the outside of the end plate 2. The design of the insulating plate 3 with the folded edge 32 allows the insulating plate 3 to not only cover the contact surface between the cell 11 and the end plate 2, but also extend to the outside of the end plate 2, which greatly increases the creepage distance. The plate body 31 is fixedly connected to the adjacent cell 11 or end plate 2, ensuring that when the battery module 100 is subjected to external impact or vibration, the insulating plate 3 can remain in the correct position and continue to perform its insulation function, thereby optimizing the insulation performance between the end plate 2 and the cell 11 and improving the safety and reliability of the battery module 100.

[0064] According to a third aspect of this application, a battery pack 1000 is provided, including a housing and a battery module 100. The structure of the battery module 100 is as described above. The battery module 100 is disposed in the housing. Since the battery pack 1000 adopts all the technical solutions of all the above embodiments, it has at least the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0065] In some embodiments, see Figure 6 The housing includes a bottom protective plate 200, with an insulating layer 210 on the side of the bottom protective plate 200 facing the cell assembly 1; the plate body 31 and the folded edge 32 are adjacent to the insulating layer 210. In these embodiments, the insulating plate 3 and the insulating layer 210 on the bottom protective plate 200 are spatially tightly connected, forming a continuous insulating protective structure. During the operation of the battery module 100, this structure can effectively prevent short circuits caused by accidental contact between the cell assembly 1 and the bottom protective plate 200, further improving the safety of the battery module 100. Specifically, as shown... Figure 6 As shown, the lower end face of the board body 31 is bonded to the insulating layer 210, and the folded edge 32 is U-shaped with the opening facing downwards (combined with...). Figure 3 and Figure 4 The open end face of the folded edge 32 is bonded to the insulating layer 210.

[0066] According to a fourth aspect of this application, an electrical device is provided, including a battery module 100 or a battery pack 1000. The structure of the battery module 100 or the battery pack 1000 is as described above. Since the electrical device adopts all the technical solutions of all the above embodiments, it at least has the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. This application does not specifically limit the type of electrical device, and the electrical device includes, but is not limited to, automobiles, ships, household appliances, and industrial equipment.

[0067] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0068] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0069] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0070] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A battery module, characterized in that, include: A battery cell assembly includes multiple battery cells arranged along a first direction; Two end plates are respectively disposed at both ends of the battery cell assembly in the first direction; as well as, Two insulating plates are respectively provided for the two end plates. Each insulating plate includes a plate body and a folded edge connected to the plate body. The plate body is sandwiched between the end plate and the cell group and is fixedly connected to the adjacent cell or the end plate. The folded edge is bent toward the cell group and located on the outside of the cell group.

2. The battery module according to claim 1, characterized in that, The folded edge includes two opposing first parts and a second part connected between the two first parts.

3. The battery module according to claim 1, characterized in that, The folded edge is arranged in a ring shape and surrounds the outer periphery of the battery cell assembly.

4. The battery module according to claim 2, characterized in that, The folded edge has a notch, which is used to avoid the electrode post of the adjacent battery cell.

5. The battery module according to any one of claims 1-4, characterized in that, The folded edge has a dimension of 2 mm or greater in the first direction.

6. The battery module according to any one of claims 1-4, characterized in that, The plate body is bonded to the adjacent battery cell.

7. The battery module according to claim 6, characterized in that, The plate body has two spaced first limiting blocks protruding from one side facing the battery cell assembly. The battery module includes a first colloid, which is disposed between the two first limiting blocks.

8. The battery module according to any one of claims 1-4, characterized in that, The plate body is bonded to the adjacent end plate.

9. The battery module according to claim 8, characterized in that, The plate body has two spaced second limiting blocks protruding from the side opposite to the cell assembly. The battery module includes a second colloid, which is disposed between the two second limiting blocks.

10. The battery module according to any one of claims 1-4, characterized in that, The insulating plate also includes reinforcing ribs, which protrude from the side of the folded edge away from the battery cell assembly.

11. The battery module according to any one of claims 1-4, characterized in that, The end plate is provided with a limiting groove on the side opposite to the battery cell assembly; The battery module also includes a ring clamp, which is disposed outside the two end plates, the two insulating plates, and the battery cell assembly, and a portion of the ring clamp is located in the limiting groove.

12. A battery module, characterized in that, include: A battery cell assembly includes multiple battery cells arranged along a first direction; Two end plates are respectively disposed at both ends of the battery cell assembly in the first direction; as well as, Two insulating plates are respectively provided for the two end plates. Each insulating plate includes a plate body and a folded edge connected to the plate body. The plate body is sandwiched between the end plate and the cell assembly and is fixedly connected to the adjacent cell or the end plate. The folded edge is bent toward the adjacent end plate and located on the outside of the end plate.

13. A battery pack, characterized in that, include: Box; as well as, The battery module as described in any one of claims 1-12, wherein the battery module is disposed within the housing.

14. The battery pack according to claim 13, characterized in that, The enclosure includes a bottom protective plate, and the bottom protective plate has an insulating layer on the side facing the battery cell assembly; The plate body and the folded edge are adjacent to the insulating layer.

15. An electrical appliance, characterized in that, This includes the battery module as described in any one of claims 1-12, or the battery pack as described in claim 13 or 14.

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