Protective assembly, battery module and battery pack

Abstract

The utility model relates to soft package electric core technical field discloses a protection assembly, battery module and battery package, and protection assembly has the first direction, second direction and third direction of two -two intersection, and protection assembly includes first heat insulating part and first fire -retardant part, first heat insulating part is provided with at least two, and the first heat insulating part interval arrangement of two adjacent, the first heat insulating part is formed with the clamping groove along the third direction, the clamping groove is suitable for holding the electric core unit in, and is suitable for passing through the pole lug, first fire -retardant part is provided with at least one, and first fire -retardant part sets up between two adjacent first heat insulating parts, and is connected with two first heat insulating parts respectively. The utility model installs first fire -retardant part to first heat insulating part, and through the positioning of the clamping groove of first heat insulating part, installs protection assembly accurately and fast on the electric core unit, improves the installation efficiency and accuracy of protection assembly.

Description

Technical Field

[0001] This utility model relates to the field of soft-pack battery technology, specifically to protective components, battery modules, and battery packs. Background Technology

[0002] Thermoelectric separation is a technological concept that separates the heat transfer path from the current transfer path, aiming to optimize equipment performance and improve safety and reliability. In battery systems, thermoelectric separation is equally important. Taking a small power battery pack as an example, heat is generated when current passes through a conductor. If heat is mixed with the current path, it can not only affect the normal operation of electronic components and the battery, but may also cause safety issues.

[0003] In related technologies, fire-retardant materials are pasted between closely packed battery cells to ensure the safety performance of the battery pack. However, directly pasting fire-retardant materials is difficult and inefficient. Utility Model Content

[0004] In view of this, the present invention provides a protective component, a battery module, and a battery pack to solve the problems of difficult and inefficient installation of fireproof materials.

[0005] In a first aspect, the present invention provides a protective component having a first direction, a second direction, and a third direction intersecting in pairs, including a first heat insulation component and a first fireproof component. At least two first heat insulation components are provided, with adjacent two first heat insulation components spaced apart. A clamping groove is formed in the first heat insulation component along the third direction, and the clamping groove is suitable for clamping a battery cell unit and for passing through an electrode tab. At least one first fireproof component is provided, and the first fireproof component is disposed between two adjacent first heat insulation components and is respectively connected to the two first heat insulation components.

[0006] Beneficial effects: By installing the first fireproof component onto the first heat insulation component and positioning it through the clamping groove of the first heat insulation component, the protective component can be accurately and quickly installed onto the battery cell unit, improving the installation efficiency and accuracy of the protective component.

[0007] In one optional embodiment, the first heat insulation member includes a main body and a connecting part. Two main bodies are provided, and the two main bodies are spaced apart along a first direction to form the clamping groove. The connecting part (12) is connected to both main bodies at the same time. The first fireproof member is connected to the side of the main body away from the clamping groove.

[0008] Beneficial effects: By using different cell unit structural dimensions, the clamping groove formed by the connection part and the main body can be customized and adjusted, which improves the flexibility and adaptability of the protective components.

[0009] In one optional embodiment, the main body includes a retaining edge and a baffle. The retaining edge is formed by protruding one end of the baffle in a third direction toward a first direction. Two baffles are spaced apart. The first fireproof member is connected to the baffle, and the edge of the first fireproof member abuts against the retaining edge.

[0010] Beneficial effects: The structure of the edge and the baffle is simple, and the angle structure formed by the edge and the baffle facilitates the connection and positioning of the first fireproof component.

[0011] In one optional embodiment, the first heat insulation element has mounting holes, and at least two of the first heat insulation elements are arranged along a first direction. The protective assembly further includes a connecting rod, which passes through the mounting holes of a plurality of the first heat insulation elements in sequence along the first direction.

[0012] Beneficial effects: Connecting several first heat insulation components in series with connecting rods enhances the stability of the overall structure, improves the structural strength of the protective components, and thus improves the mechanical strength of the battery module and battery pack; the connecting rods further improve the assembly speed and ease of assembly of the protective components.

[0013] Secondly, this utility model also provides a battery module, including the aforementioned protective components, cell unit, and potting structure; the cell unit has a tab formed at its first end along a third direction, the first end being disposed in the clamping groove, and the tab extending out of the clamping groove; the potting structure is at least connected to the second end of the cell unit along a third direction.

[0014] Beneficial effects: The potting structure allows the cell unit to vent air from the first end. The protective components at the first end of the cell unit protect the tabs at the first end, achieving thermal and electrical separation and improving the safety performance of the battery module.

[0015] In one optional embodiment, the first heat insulation member has a through hole along a third direction, at least one through hole is provided, the through hole extends along a second direction, the through hole communicates with the clamping groove, and the electrode tab extends out from the through hole.

[0016] In one optional embodiment, a plurality of battery cells are provided, and the plurality of battery cells are arranged along a first direction. The battery module further includes a buffer member, which is disposed on opposite sides of the battery cells along the first direction.

[0017] Beneficial effects: The buffer buffer reduces the pressure between adjacent battery cells, protecting the battery cells and improving the safety performance of the battery module.

[0018] In one optional embodiment, the battery module further includes a second heat insulation component disposed between two adjacent battery cells and abutting against the battery cells; and / or, a plurality of battery cells are arranged along the first direction to form a battery cell array, the battery module further includes a second fireproof component and a separator, two separators are provided, the two separators are respectively disposed on both sides of the battery cell array along the first direction, and the second fireproof component is connected to the separator and the first heat insulation component on both sides along the first direction.

[0019] Beneficial effects: The second heat insulation component isolates the heat transfer between two adjacent battery cells, preventing heat spread and improving the safety performance of the battery module; the separator protects the two sides of the battery cell array along the first direction; and the second fireproof component provides heat insulation and fire protection for the space between the two sides of the battery cell array and the separator, further improving the safety performance of the battery module.

[0020] In one alternative embodiment, the battery module further includes a circuit board disposed opposite to the first end of the battery cell in a third direction, and the circuit board is electrically connected to the tab.

[0021] Thirdly, this utility model also provides a battery pack, including the aforementioned battery module and housing, wherein a receiving cavity is formed inside the housing, and the battery module is disposed within the receiving cavity. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the protective component according to an embodiment of the present utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the rodless protective assembly of this utility model at a first angle according to an embodiment of the present invention;

[0025] Figure 3 This is a structural schematic diagram of the rodless protective assembly according to an embodiment of the present invention at a second angle.

[0026] Figure 4 This is a schematic diagram of the overall structure of the battery module according to an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10. First heat insulation component; 11. Main body; 111. Edge retainer; 112. Baffle; 12. Connecting part; 13. Gutter; 14. Mounting hole; 15. Through hole; 20. First fireproof component; 30. Connecting rod; 40. Battery cell unit; 41. Electrode; 42. Main body; 50. Buffer component; 60. Second heat insulation component; 70. Second fireproof component; 80. Partition; 90. Circuit board; X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] The following is combined with Figures 1 to 4 The following describes embodiments of the present invention.

[0031] According to an embodiment of the present invention, in a first aspect, a protective component is provided, having intersecting first directions X, second directions Y, and third directions Z, including a first heat insulation member 10 and a first fireproof member 20. At least two first heat insulation members 10 are provided, with adjacent first heat insulation members 10 spaced apart. A clamping groove 13 is formed in the first heat insulation member 10 along the third direction Z, the clamping groove 13 being suitable for clamping a battery cell unit 40 and suitable for passing through an electrode tab 41. At least one first fireproof member 20 is provided, the first fireproof member 20 being disposed between two adjacent first heat insulation members 10 and connected to the two first heat insulation members 10 respectively.

[0032] By applying the protective component of this embodiment, the first fireproof component 20 is installed on the first heat insulation component 10, and the protective component is accurately and quickly installed on the cell unit 40 through the positioning of the clamping groove 13 of the first heat insulation component 10, thereby improving the installation efficiency and accuracy of the protective component; the first heat insulation component 10 and the first fireproof component 20 provide thermal protection for one end of the cell unit 40, thereby improving the safety performance of the battery module.

[0033] It should be noted that in related technologies, in order to ensure the safety performance of the battery pack, fireproof material is often directly pasted between the closely arranged cells. However, when directly pasting fireproof material, it is difficult to put the fireproof material into the gap and then connect it because the gap between the cell units 40 is small, resulting in low work efficiency.

[0034] Therefore, in this embodiment, before installation onto the battery cell unit 40, the first heat insulation component 10 and the second fireproof component 70 are pre-assembled, and the clamping groove 13 formed by the connection facilitates quick positioning with the battery cell unit 40 during installation, reducing installation difficulty and improving work efficiency.

[0035] Specifically, in this embodiment, the first heat insulation component 10 is ceramic silicone rubber, and the first fireproof component 20 is mica paper. Using mica paper and ceramic silicone rubber as the first fireproof component 20 and the first heat insulation component 10, the insulation properties of these components reduce the risk of short circuits between the battery cells 40 and improve the electrical safety of the battery module.

[0036] Of course, other heat insulation or fireproof materials can also be used in other alternative implementations.

[0037] Specifically, such as Figure 2 As shown, a first fireproof component 20 is provided between every two first heat insulation components 10 to prevent the flame from affecting the adjacent battery cell units 40 from both sides of the first direction X.

[0038] In one embodiment, such as Figure 2 As shown, the first heat insulation component 10 includes a main body 11 and a connecting part 12. Two main body parts 11 are provided, spaced apart along a first direction X to form a clamping groove 13. The connecting part 12 is connected to both main body parts 11 simultaneously. The first fireproof component 20 is connected to the side of the main body part 11 away from the clamping groove 13. The clamping groove 13 formed by the connecting part 12 and the main body part 11 can be customized and adjusted by using different battery cell unit 40 structural dimensions, improving the flexibility and adaptability of the protective component.

[0039] It should be noted that the width or length of each different battery cell unit 40 is different. The width of the battery cell unit 40 can be adapted by adjusting the spacing between the two main body parts 11, and the length of the connecting part 12 and the main body part 11 along the second direction Y can be adapted to the length of the battery cell unit 40, thereby improving the flexibility and adaptability of the protective assembly.

[0040] In one embodiment, such as Figure 2 As shown, the main body 11 includes a retaining edge 111 and a baffle 112. The retaining edge 111 is formed by protruding from one end of the baffle 112 along a third direction Z towards a first direction X. The two baffles 112 are spaced apart. The first fireproof component 20 is connected to the baffle 112, and the edge of the first fireproof component 20 abuts against the retaining edge 111. The structure of the retaining edge 111 and the baffle 112 is simple, and the included angle structure formed by the retaining edge 111 and the baffle 112 facilitates the connection and positioning of the first fireproof component 20.

[0041] Specifically, such as Figure 2As shown, the main body 11 has an "L" shaped structure, and the first fireproof component 20 is connected to the baffle 112. It is understandable that if only the baffle 112 is provided, the connection position between the first fireproof component 20 and the baffle 112 cannot be quickly confirmed, and the connection position between each first fireproof component 20 and the baffle 112 cannot be uniform, which is not conducive to standardized operation.

[0042] Of course, in other alternative embodiments, the first fireproof component 20 may also be connected to the baffle 112, or the first fireproof component 20 may also be connected to both the edge 111 and the baffle 112.

[0043] Furthermore, such as Figure 3 As shown, the first heat insulation component 10 has mounting holes 14, and at least two first heat insulation components 10 are arranged along the first direction X. The protective assembly also includes a connecting rod 30, which passes through the mounting holes 14 of several first heat insulation components 10 sequentially along the first direction X. By connecting several first heat insulation components 10 in series with the connecting rod 30, the stability of the overall structure is enhanced, the structural strength of the protective assembly is improved, and thus the mechanical strength of the battery module and battery pack is improved. The connecting rod 30 also further improves the assembly speed and ease of assembly of the protective assembly.

[0044] Specifically, such as Figure 4 As shown, in this embodiment, there are thirteen first heat insulation members 10, arranged along the first direction X.

[0045] Specifically, there are two connecting parts 12, which are respectively located at both ends of the main body 11 along the second direction Y. Each connecting part 12 has a mounting hole 14, such as... Figure 1 As shown, there are two connecting rods 30, which are respectively located at both ends of the main body 11 along the second direction Y.

[0046] It should be noted that the number of mounting holes 14 and connecting rods 30 on the connecting part 12 can be adjusted according to actual needs.

[0047] According to an embodiment of the present invention, in a second aspect, a battery module is provided, including the aforementioned protective components, a cell unit 40, and a potting structure; the cell unit 40 has a tab 41 formed at its first end along the third direction Z, the first end being disposed in a clamping groove 13, and the tab 41 extending out of the clamping groove 13; the potting structure is at least connected to the second end of the cell unit 40 along the third direction Z.

[0048] The battery module using this embodiment uses a potting structure to allow the cell unit 40 to vent from the first end. The protective component at the first end of the cell unit 40 protects the tab 41 at the first end, achieving thermal-electric separation and improving the safety performance of the battery module.

[0049] Specifically, the battery cell 40 includes a body portion 42 and a tab 41, with the tab 41 extending from the body portion 42 in a third direction Z.

[0050] Specifically, in this embodiment, the potting structure is connected to the second end of the battery cell 40 along the third direction Z and the circumferential direction of the battery cell 40 along the third direction Z. The potting structure seals the circumferential direction and the second end of the battery cell 40 to limit the exhaust direction of the battery cell 40, prevent high-temperature gas from spreading from the battery cell 40 along the circumferential direction Z, and prevent heat spread.

[0051] It should be noted that after the battery module is placed into the battery pack housing, the above-mentioned potting structure is formed by potting adhesive between the battery module and the housing.

[0052] In one embodiment, such as Figure 1 and Figure 3 As shown, the first heat insulation member 10 has a through hole 15 along the third direction Z. At least one through hole 15 is provided. The through hole 15 extends along the second direction Y. The through hole 15 communicates with the clamping groove 13. The electrode tab 41 extends out from the through hole 15.

[0053] Specifically, such as Figure 3 As shown, a through hole 15 is provided along the second direction Y. The through hole 15 is located near the middle part of the first heat insulation member 10. The electrode tab 41 is narrowed so that the positive electrode tab and the negative electrode tab extend out of one through hole 15 at the same time, which saves processing steps.

[0054] Furthermore, such as Figure 3 As shown, the two connecting parts 12 are connected to the main body 11 to block the opening of the clamping groove 13 along the third direction Z, thereby forming the above-mentioned through hole 15. This can not only ensure the overall strength, but also limit the position of the tab 41.

[0055] Of course, in other alternative embodiments, there may be two through holes 15, which are respectively provided on both sides of the first heat insulation member 10 along the second direction Y, and each through hole 15 corresponds to a normal-sized tab 41.

[0056] In one embodiment, such as Figure 4 As shown, a plurality of battery cell units 40 are arranged along a first direction X. The battery module also includes a buffer member 50, which is disposed on opposite sides of the battery cell units 40 along the first direction X. The buffer member 50 buffers the pressure between adjacent battery cell units 40, thereby protecting the battery cell units 40 and improving the safety performance of the battery module.

[0057] Specifically, the cushioning element 50 is made of foam.

[0058] Of course, in other alternative implementations, the buffer 50 can also be selected as other elastic material structures.

[0059] It should be noted that during the charging process of the battery cell 40, the volume of the battery cell 40 may expand, which may cause pressure between adjacent battery cell 40. The buffer 50 absorbs this pressure to prevent adjacent battery cell 40 from being damaged by pressure collision and affecting the performance of the battery module.

[0060] In one embodiment, such as Figure 4 As shown, several battery cell units 40 are arranged along a first direction X to form a cell array. The battery module also includes a second fireproof component 70 and a separator 80. Two separators 80 are provided, one on each side of the cell array along the first direction X. The second fireproof component 70 is connected to the separator 80 and the first heat insulation component 10 along both sides of the cell array along the first direction X. The separator 80 protects the cell array along both sides of the first direction X, and the second fireproof component 70 provides heat insulation and fire protection for the space between the two sides of the cell array and the separator 80, thereby improving the safety performance of the battery module.

[0061] Specifically, the second fireproof component 70 is made of mica paper.

[0062] Of course, in other alternative embodiments, the second fireproof component 70 may also be made of other fireproof and heat-insulating materials.

[0063] In one embodiment, such as Figure 4 As shown, the battery module also includes a second heat insulation component 60, which is disposed between two adjacent cell units 40 and abuts against the cell units 40. The second heat insulation component 60 isolates heat transfer between two adjacent cell units 40, preventing heat spread and improving the safety performance of the battery module.

[0064] Specifically, the second insulation element 60 is aerogel.

[0065] It should be noted that when a second heat insulation component 60 is provided between two battery cell units 40, two first fireproof components 20 can be provided between the two first heat insulation components 10 near the second heat insulation component 60. The first fireproof components 20 are connected to the first heat insulation component 10 and the second heat insulation component 60 on both sides along the first direction X, respectively.

[0066] Of course, in other alternative embodiments, the second heat insulation member 60 may also adopt other heat insulation structures, such as vacuum heat insulation panels.

[0067] In one embodiment, such as Figure 4As shown, the battery module also includes a circuit board 90, which is disposed opposite to the first end of the cell unit 40 along the third direction Z, and the circuit board 90 is electrically connected to the tab 41.

[0068] Specifically, the circuit board 90 has a through hole, the tab 41 passes through the through hole and bends, and abuts against the side of the circuit board 90 away from the body 42 along the third direction Z. The through hole in the circuit board 90 can reduce the weight of the circuit board 90 and reduce the heat generated by the circuit board 90.

[0069] Furthermore, additional heat-insulating materials can be placed at the connection between the circuit board 90 and the tab 41 to further insulate the battery and improve the thermoelectric separation performance of the battery module.

[0070] According to an embodiment of the present invention, in a third aspect, a battery pack is provided, including the battery module and the housing described above, wherein a receiving cavity is formed inside the housing, and the battery module is disposed in the receiving cavity.

[0071] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. A protective component having intersecting first direction (X), second direction (Y), and third direction (Z), characterized in that, include: First heat insulation element (10), at least two first heat insulation elements (10) are provided, two adjacent first heat insulation elements (10) are spaced apart, and the first heat insulation element (10) is formed with a clamping groove (13) along the third direction (Z), the clamping groove (13) is suitable for clamping the battery cell unit (40) and is suitable for passing through the electrode tab (41); A first fireproof component (20) is provided at least once. The first fireproof component (20) is disposed between two adjacent first heat insulation components (10) and is connected to the two first heat insulation components (10) respectively.

2. The protective component according to claim 1, characterized in that, The first heat insulation member (10) includes a main body (11) and a connecting part (12). There are two main body parts (11), which are spaced apart along a first direction (X) to form the clamping groove (13). The connecting part (12) is connected to both main body parts (11) at the same time. The first fireproof member (20) is connected to the side of the main body part (11) away from the clamping groove (13).

3. The protective component according to claim 2, characterized in that, The main body (11) includes a retaining edge (111) and a baffle (112). The retaining edge (111) is formed by the baffle (112) protruding from one end in a third direction (Z) towards a first direction (X). The two baffles (112) are spaced apart. The first fireproof component (20) is connected to the baffle (112), and the edge of the first fireproof component (20) abuts against the retaining edge (111).

4. The protective component according to any one of claims 1-3, characterized in that, The first heat insulation component (10) has a mounting hole (14), and at least two first heat insulation components (10) are arranged along a first direction (X). The protective assembly also includes a connecting rod (30), which passes through the mounting holes (14) of a plurality of first heat insulation components (10) in sequence along the first direction (X).

5. A battery module, characterized in that, include: The protective component according to any one of claims 1-4; A battery cell unit (40) has a tab (41) formed at its first end along a third direction (Z), the first end being disposed in the clamping groove (13), and the tab (41) extending out of the clamping groove (13); A potting structure is provided at least to the second end of the cell unit (40) along a third direction (Z).

6. The battery module according to claim 5, characterized in that, The first heat insulation member (10) has a through hole (15) along the third direction (Z), and at least one through hole (15) is provided. The through hole (15) extends along the second direction (Y). The through hole (15) communicates with the clamping groove (13), and the electrode tab (41) extends out from the through hole (15).

7. The battery module according to claim 5, characterized in that, The battery cell unit (40) is provided in a plurality of manner, and the plurality of battery cell units (40) are arranged along a first direction (X). The battery module also includes a buffer member (50), which is disposed on opposite sides of the battery cell unit (40) along the first direction (X).

8. The battery module according to claim 7, characterized in that, The battery module further includes a second heat insulation component (60), which is disposed between two adjacent battery cells (40) and abuts against the battery cells (40); and / or, A plurality of the battery cell units (40) are arranged along the first direction (X) to form a battery cell array. The battery module further includes a second fireproof component (70) and a separator (80). There are two separators (80), which are respectively disposed on both sides of the battery cell array along the first direction (X). The second fireproof component (70) is connected to the separator (80) and the first heat insulation component (10) on both sides of the first direction (X).

9. The battery module according to claim 5, characterized in that, The battery module also includes a circuit board (90), which is disposed opposite to the first end of the cell unit (40) along a third direction (Z), and the circuit board (90) is electrically connected to the tab (41).

10. A battery pack, characterized in that, include: The battery module according to any one of claims 5-9; The housing has a cavity inside, and the battery module is disposed in the cavity.

Images