Battery pack and electric device

Abstract

The utility model relates to a battery pack and a power utilization device. The battery pack comprises a battery pack shell, a battery module and insulating filling glue, a shell cavity is formed in the battery pack shell, and the battery module is arranged in the shell cavity; the insulating filling glue is filled in the shell cavity and wraps the battery module; wherein the battery module comprises at least two battery monomers, at least one electric connecting piece and at least one first insulating layer; every two adjacent single batteries are electrically connected through the corresponding electric connecting piece; and the first insulating layer is positioned between the electric connecting piece and the insulating filling adhesive. By arranging the insulating filling adhesive and the first insulating layer, a large-size interval space does not need to be reserved between the electric connecting piece and the battery pack shell, and by utilizing the double-layer insulating design of the insulating filling adhesive and the first insulating layer, the requirement of an insulating space can be effectively reduced, and the overall integration level of the battery pack is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of battery pack, in particular, to a battery pack and a power utilization device. BACKGROUND

[0002] As one of the core components of new energy electric vehicles, the integration, safety and cost of the battery pack are key points to be considered in the design process.

[0003] In the related art, the battery monomer is arranged in the battery module in the battery pack, and the battery monomers are often electrically connected through the cross aluminum row. In order to realize the insulation between the cross aluminum row and the battery pack shell, a large space is often arranged between the two, thereby greatly reducing the integration of the battery pack. UTILITY MODEL CONTENT

[0004] In order to overcome the problems in the related art, the present disclosure provides a battery pack and a power utilization device to solve the technical problems in the related art.

[0005] According to a first aspect of the embodiments of the present disclosure, a battery pack is provided, comprising: a battery pack shell, a battery module, and an insulating filling glue.

[0006] The inside of the battery pack shell forms a shell cavity, and the battery module is arranged in the shell cavity; the insulating filling glue is filled in the shell cavity and covers the battery module.

[0007] The battery module comprises at least two battery monomers, at least one electrical connecting piece, and at least one first insulating layer.

[0008] The two adjacent battery monomers are electrically connected through the electrical connecting piece.

[0009] The first insulating layer is located between the electrical connecting piece and the insulating filling glue.

[0010] In some embodiments, the battery module and the cover plate of the battery pack shell are spaced apart in a first direction to form a filling space.

[0011] The insulating filling glue is filled in the filling space.

[0012] The first insulating layer is arranged on the side of the electrical connecting piece away from the battery monomer in the first direction, and the first insulating layer is connected with the insulating filling glue.

[0013] In some embodiments, the insulating filling glue comprises a first area, the first area is arranged opposite to the first insulating layer in the first direction, and the size of the first area in the first direction is between 1mm and 2mm.

[0014] In some embodiments, the first insulating layer has a size in the first direction between 300 um and 500 um.

[0015] In some embodiments, the battery pack further comprises a second insulating layer, the second insulating layer is arranged on the inner wall of the battery pack shell and is located between the insulating filling glue and the battery pack shell; wherein the second insulating layer is arranged at least opposite to the first insulating layer.

[0016] In some embodiments, the second insulating layer has a thickness between 150 um and 200 um.

[0017] In some embodiments, the battery module further comprises at least one insulating support;

[0018] The first insulating layer is arranged on the side of the electrical connector away from the battery monomer in the first direction, and the distance between the first insulating layer and the battery pack shell in the first direction is a first size;

[0019] The insulating support is arranged protrudingly on the battery monomer in the first direction, and the distance between the insulating support and the battery pack shell in the first direction is a second size;

[0020] Wherein, the first size is greater than the second size.

[0021] In some embodiments, the difference between the first size and the second size is between 0.5 mm and 1 mm.

[0022] In some embodiments, the battery module comprises at least two battery unit groups, the battery unit groups are arranged in a second direction;

[0023] Each of the battery unit groups comprises two battery monomers arranged in the second direction, and the two battery monomers are electrically connected by the electrical connector;

[0024] The insulating support is arranged between adjacent two battery unit groups;

[0025] Wherein, the first direction and the second direction are arranged intersectingly.

[0026] In some embodiments, the insulating support comprises a U-shaped support, the U-shaped support comprises a first support plate, a second support plate and a third support plate;

[0027] The first support plate and the second support plate are arranged along the first direction to extend to the battery monomer, the third support plate extends along the second direction and connects the first support plate and the second support plate, and the third support plate is arranged opposite to the battery pack shell in the first direction.

[0028] In some embodiments, the battery pack further comprises an insulating support frame arranged at the battery monomer;

[0029] The first support plate is provided with a first flange on one side away from the battery pack shell in the first direction;

[0030] The second support plate is provided with a second flange on one side away from the battery pack shell in the first direction;

[0031] The first flange and the second flange are connected to the insulating support frame.

[0032] According to a second aspect of the embodiments of the present disclosure, a power utilization device is additionally provided, the power utilization device comprising the battery pack; wherein the power utilization device comprises a vehicle.

[0033] The technical solutions provided by the embodiments of the present disclosure can have the following beneficial effects: first, by filling the insulating filling glue in the cavity of the shell and coating the battery module, the insulating filling glue can play a good insulating protection role, avoiding the insulation failure caused by the direct contact between the battery pack shell and the battery module. Moreover, in addition to the insulating role, the insulating filling glue can also be used as a filling material to fix the position of the battery module, thereby enhancing the stability of the overall structure of the battery pack, helping to reduce the displacement of internal components caused by vibration or impact, and prolonging the service life of the battery pack. Second, by arranging the insulating filling glue and the first insulating layer, a large-size spacing space does not need to be reserved between the electrical connector and the battery pack shell, and by using the double-layer insulating design of the insulating filling glue and the first insulating layer, the demand for insulating space can be effectively reduced, and the integration of the overall battery pack can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present disclosure and serve to explain the principles of the present disclosure together with the specification.

[0035] Figure 1 is an explosion structure schematic diagram of a battery pack of an embodiment of the present disclosure.

[0036] Figure 2 is a cross-sectional view schematic diagram of a battery pack in a second direction of an embodiment of the present disclosure.

[0037] Figure 3 isFigure 2 A close-up view of the middle D.

[0038] Figure 4 A close-up view of the middle E. Figure 3 A close-up view of the middle E.

[0039] Figure 5 A close-up view of the middle E. Figure 3 A close-up view of the middle E.

[0040] BRIEF DESCRIPTION OF DRAWINGS

[0041] 1. battery pack shell; 10, shell cavity; 101, filling space; 11, cover plate; 12, side plate; 13, bottom plate;

[0042] 2. battery module; 20, battery unit group; 21, battery monomer; 22, electrical connection; 23, first insulation layer; 24, insulation support; 241, first support plate; 242, second support plate; 243, third support plate; 244, first flange; 245, second flange; 25, insulation support frame;

[0043] 3. insulation filling glue; 31, first area; 4, second insulation layer; 100, battery pack;

[0044] A, first direction; B, second direction. DETAILED DESCRIPTION

[0045] Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. In the following description, the same drawings refer to the same elements or similar elements. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present disclosure. Rather, they are merely examples of devices and methods consistent with some aspects of the present disclosure, as detailed in the appended claims.

[0046] In the present disclosure, unless otherwise specified, the orientation words such as "first direction, second direction" can also refer to the orientation of the specific structure shown in Figure 1 and Figure 3 The orientation words used such as "inner, outer" refer to the inner and outer of the specific structure profile, and the terms "first, second" are used only to distinguish one element from another element, and do not have sequential and important nature.

[0047] In the description of the present disclosure, it should also be noted that, unless otherwise specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0048] Referring to Figures 1 to 5 The battery pack 100 includes a battery pack shell 1, a battery module 2, and an insulating filling glue 3. The battery pack shell 1 has a shell cavity 10 formed inside, and the battery module 2 is arranged in the shell cavity 10. The insulating filling glue 3 is filled in the shell cavity 10 and covers the battery module 2. The battery module 2 includes at least two battery monomers 21, at least one electrical connector 22, and at least one first insulating layer 23. The two adjacent battery monomers 21 are electrically connected through the electrical connector 22. The first insulating layer 23 is located between the electrical connector 22 and the insulating filling glue 3.

[0049] In the above technical solution, first, by filling the insulating filling glue 3 in the shell cavity 10 and covering the battery module 2, the insulating filling glue 3 can play a good insulating protection role, avoiding the insulation failure caused by the direct contact between the battery pack shell 1 and the battery module 2. Moreover, in addition to the insulating role, the insulating filling glue 3 can also be used as a filling material to fix the position of the battery module 2, thereby enhancing the stability of the overall structure of the battery pack 100, reducing the displacement of the internal components caused by vibration or impact, and prolonging the service life of the battery pack 100. Secondly, by arranging the insulating filling glue 3 and the first insulating layer 23, a large-size spacing space does not need to be reserved between the electrical connector 22 and the battery pack shell 1. By using the double-layer insulating design of the insulating filling glue 3 and the first insulating layer 23, the demand for insulating space can be effectively reduced, and the integration of the overall battery pack 100 can be improved.

[0050] Optionally, the insulating filling glue 3 can be a foaming glue or a non-foaming glue, and the disclosure does not limit the specific type of the insulating filling glue 3. In addition, the filling method of the insulating filling glue 3 can be a half-filling method or a full-filling method, and the same glue can be used in different regions, and the disclosure does not limit this.

[0051] In addition, in the related art, a high-low voltage connection space is often reserved separately in the top pole region of the battery monomer 21, including insulating protection and buffer space. A height of 10 mm to 12 mm needs to be reserved between the cover plate 11 of the battery pack shell 1 and the top pole region of the battery monomer 21, which is not conducive to the design of the integration of the battery pack 100.

[0052] To solve the above problems in the related art, in an embodiment of the disclosure, referring to Figure 3 and Figure 4As shown, the battery module 2 and the cover plate 11 of the battery pack shell 1 are spaced apart in the first direction A to form a filling space 101; the insulating filling glue 3 is filled in the filling space 101; and the first insulating layer 23 is arranged on the side of the electrical connector 22 away from the battery monomer 21 in the first direction A, and the first insulating layer 23 is connected with the insulating filling glue 3.

[0053] That is, in this embodiment, by filling the insulating filling glue 3 in the filling space 101 between the battery module 2 and the cover plate 11 of the battery pack shell 1, the insulating property of the insulating filling glue 3 can effectively reduce the insulating protection size of the filling space 101 in the first direction A, which is conducive to the design of the integration of the battery pack 100. In addition, by arranging the first insulating layer 23 on the side of the electrical connector 22 away from the battery monomer 21 in the first direction A, and connecting the first insulating layer 23 with the insulating filling glue 3, the insulating protection effect of the electrical connector 22 can be further improved.

[0054] Optionally, the above-mentioned electrical connector 22 can be connected to the two pole end faces of the adjacent two battery monomers 21, and the pole end face of the battery monomer 21 can be arranged opposite to the cover plate 11 of the battery pack shell 1, or the pole end face of the battery monomer 21 can be arranged opposite to the bottom plate 13 of the battery pack shell 1, and the present disclosure does not limit this.

[0055] Optionally, referring to Figure 4 As shown, the insulating filling glue 3 includes a first area 31, the first area 31 is arranged opposite to the first insulating layer 23 in the first direction A, and the size of the first area 31 in the first direction A is between 1mm and 2mm.

[0056] For example, the size of the first area 31 in the first direction A can be 1mm, or the size of the first area 31 in the first direction A can be 1.5mm, or the size of the first area 31 in the first direction A can be 2mm, and the present disclosure does not limit the specific size of the first area 31 in the first direction A.

[0057] In addition, referring to Figure 4 As shown, the size of the first insulating layer 23 in the first direction A is between 300um and 500um. For example, the size of the first insulating layer 23 in the first direction A is 300um; or the size of the first insulating layer 23 in the first direction A is 400um; or the size of the first insulating layer 23 in the first direction A is 500um, and the present disclosure does not limit the size of the first insulating layer 23 in the first direction A.

[0058] For the specific material of the first insulation layer 23, an insulation spraying material can be used, which can be sprayed uniformly on the side of the electrical connector 22 away from the battery monomer 21 in the first direction A. For example, the insulation spraying material can be epoxy resin, but the specific material of the first insulation layer 23 and the specific manner of being arranged on the electrical connector 22 are not limited in the present disclosure.

[0059] In another embodiment, referring to FIG. 1, the battery pack 100 can further include a second insulation layer 4 arranged on the inner wall of the battery pack shell 1 between the insulation filling glue 3 and the battery pack shell 1, wherein the second insulation layer 4 is arranged at least opposite to the first insulation layer 23. Figure 4

[0060] In this embodiment, by further arranging the second insulation layer 4 on the inner wall of the battery pack shell 1, the insulation protection of the electrical connector 22 can be further improved, and the insulation failure can be prevented by the three-layer insulation protection of the insulation filling glue 3, the first insulation layer 23 and the second insulation layer 4.

[0061] For example, the thickness of the second insulation layer 4 is between 150um and 200um. For example, the thickness of the second insulation layer 4 can be 150um, or the thickness of the second insulation layer 4 can be 160um, or the thickness of the second insulation layer 4 can be 200um, and the specific thickness of the second insulation layer 4 is not limited in the present disclosure.

[0062] In addition, for the specific material of the second insulation layer 4, an insulation spraying material can be used, for example, the insulation spraying material can be epoxy resin, but the specific material of the second insulation layer 4 and the specific manner of being arranged on the inner wall of the battery pack shell 1 are not limited in the present disclosure.

[0063] For example, the insulation spraying material can be sprayed uniformly on the entire inner wall of the battery pack shell 1. Or the insulation spraying material can be sprayed on the entire inner wall of the cover plate 11 of the battery pack shell 1, or the insulation spraying material can be sprayed only on the area opposite to the first insulation layer 23 in the first direction A of the cover plate 11, and the present disclosure does not limit this.

[0064] In addition, for the above-mentioned electrical connector 22, it can be configured as a jumper aluminum row, but the specific material of the electrical connector 22 is not limited in the present disclosure.

[0065] ​In summary, through the three-layer insulation protection design of the first insulating layer 23, the insulating filler 3, and the second insulating layer 4, the height required between the cover plate 11 and the top terminal area of ​​the battery cell 21 in the related technology is reduced from 10mm to 12mm to 5mm to 6mm, which is equivalent to reducing the height requirement by half, thereby greatly improving the integration and compactness of the battery pack 100.

[0066] In another embodiment, refer to Figure 3 and Figure 5 As shown, the battery module 2 also includes at least one insulating support member 24; a first insulating layer 23 is disposed on the side of the electrical connector 22 away from the battery cell 21 along the first direction A, and the distance between the first insulating layer 23 and the battery pack housing 1 in the first direction A is a first dimension; the insulating support member 24 is protruding from the battery cell 21 in the first direction A, and the distance between the insulating support member 24 and the battery pack housing 1 in the first direction A is a second dimension; wherein, the first dimension is greater than the second dimension.

[0067] In other words, compared to the electrical connector 22 with the first insulating layer 23, the insulating support 24 is positioned closer to the battery pack housing 1 in the first direction A. By providing the insulating support 24, the risk of insulation failure caused by direct contact between the battery pack housing 1 and the first insulating layer 23 can be effectively avoided. Even if the battery pack housing 1 is deformed and pressed inward by force in the first direction A, the insulating support 24 can still play a supporting and limiting role.

[0068] For example, the distance between the first insulating layer 23 and the cover plate 11 of the battery pack housing 1 in the first direction A is a first dimension, and the distance between the insulating support member 24 and the cover plate 11 of the battery pack housing 1 in the first direction A is a second dimension. That is, by setting the insulating support member 24, the cover plate 11 of the battery pack housing 1 can be effectively limited and supported, avoiding direct contact between the cover plate 11 and the first insulating layer 23, which would lead to insulation failure.

[0069] Optionally, the difference between the first dimension and the second dimension is between 0.5 mm and 1 mm. That is, the height of the insulating support 24 above the first insulating layer 23 in the first direction A is between 0.5 mm and 1 mm. For example, the difference between the first dimension and the second dimension can be 0.5 mm, or it can be 0.7 mm, or it can be 1 mm. This disclosure does not limit the specific difference.

[0070] Optionally, the insulating support 24 can be made of any suitable insulating material with a certain supporting strength. For example, the insulating support 24 can be made of plastic.

[0071] Optionally, the battery module 2 described above can further comprise an insulating support frame 25 arranged on the battery monomers 21 of the battery module 2, which can provide a mounting base for the insulating support 24 and the electrical connector 22 described above.

[0072] Optionally, the specific shape of the insulating support 24 can be configured as a U-shaped support shape, but the specific shape of the insulating support 24 is not limited in the present disclosure.

[0073] For example, the U-shaped support comprises a first support plate 241 extending in the first direction A and a second support plate 242, the first support plate 241 comprises a first end portion close to the battery pack housing 1 and a second end portion away from the battery pack housing 1 in the first direction A, the second support plate 242 comprises a third end portion close to the battery pack housing 1 and a fourth end portion away from the battery pack housing 1 in the first direction A, the first end portion and the second end portion are connected by a third support plate 243 extending in the second direction B, the second end portion is provided with a first flange 244, and the fourth end portion is provided with a second flange 245. Wherein, the third support plate 243 is used to support and limit the battery pack housing 1, and the first flange 244 and the second flange 245 can be connected to the insulating support frame 25 described above.

[0074] Optionally, referring to Figure 3 The battery module 2 comprises at least two battery unit groups 20, the battery unit groups 20 are arranged and disposed along the second direction B; each battery unit group 20 comprises two battery monomers 21 arranged along the second direction B, the two battery monomers 21 are electrically connected by the electrical connector 22; the insulating support 24 is arranged between the adjacent two battery unit groups 20; wherein, the first direction A and the second direction B are arranged intersectingly.

[0075] In this embodiment, by arranging the insulating support 24 between the adjacent two battery unit groups 20, the uniformity of the support can be effectively improved, and the risk of insulation failure due to local support failure can be avoided. In addition, the specific arrangement of the battery monomers 21 of the battery module 2 is not limited in the present disclosure.

[0076] In addition, for the specific structure of the battery pack housing 1 described above, in addition to the cover plate 11 and the bottom plate 13 mentioned above, it also comprises a side plate 12 connected between the cover plate 11 and the bottom plate 13, wherein the cover plate 11, the side plate 12 and the bottom plate 13 collectively enclose the housing cavity 10 described above.

[0077] The present disclosure further provides a power utilization device, which comprises the battery pack 100 described above.

[0078] Optionally, the above-mentioned electrical device can be a vehicle, that is, the battery pack 100 is applied to the use scenario of the vehicle. For example, the above-mentioned cover plate 11 can be used as the vehicle body floor of the vehicle, that is, the battery pack can be configured as a CTB battery pack, but the present disclosure does not limit the specific type of the battery pack 100, nor does it limit the electrical device, for example, the above-mentioned electrical device can also be a spacecraft or a ship, etc.

[0079] Other embodiments of the present disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the present disclosure. This application is intended to cover any variations, uses or adaptations of the present disclosure following the general principles thereof and including such departures from the present disclosure that come within known

[0080] It should be understood that the present disclosure is not limited to the precise structures as herein described and illustrated in the drawings, and that various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the claims that follow.

Claims

1. A battery pack, characterized by, The battery pack comprises: a battery pack shell, a battery module, and an insulating filling adhesive; a shell cavity is formed in the battery pack shell, and the battery module is arranged in the shell cavity; the insulating filling adhesive is filled in the shell cavity and covers the battery module; wherein the battery module comprises at least two battery monomers, at least one electrical connector, and at least one first insulating layer; two adjacent battery monomers are electrically connected by the electrical connector; the first insulating layer is located between the electrical connector and the insulating filling adhesive.

2. The battery pack of claim 1, wherein, The battery module and the cover plate of the battery pack shell are spaced apart in a first direction to form a filling space; the insulating filling adhesive is filled in the filling space; the first insulating layer is arranged on the side of the electrical connector away from the battery monomer in the first direction, and the first insulating layer is connected with the insulating filling adhesive.

3. The battery pack of claim 2, wherein, The insulating filling adhesive comprises a first area, the first area is arranged opposite to the first insulating layer in the first direction, and the size of the first area in the first direction is between 1mm and 2mm.

4. The battery pack of claim 2, wherein, The size of the first insulating layer in the first direction is between 300um and 500um.

5. The battery pack of any one of claims 1-4, wherein, The battery pack further comprises a second insulating layer, the second insulating layer is arranged on the inner wall of the battery pack shell and located between the insulating filling adhesive and the battery pack shell; wherein the second insulating layer is arranged opposite to at least the first insulating layer.

6. The battery pack of claim 5, wherein, The thickness of the second insulating layer is between 150um and 200um.

7. The battery pack of claim 1, wherein, The battery module further comprises at least one insulating support; The first insulating layer is arranged on the side of the electrical connector away from the battery monomer in the first direction, and the distance between the first insulating layer and the battery pack shell in the first direction is a first size; the insulating support is protrudingly arranged on the battery monomer in the first direction, and the distance between the insulating support and the battery pack shell in the first direction is a second size; wherein the first size is greater than the second size.

8. The battery pack of claim 7, wherein, The difference between the first size and the second size is between 0.5mm and 1mm.

9. The battery pack of claim 7, wherein, The battery module comprises at least two battery cell groups, the battery cell groups are arranged in a second direction; each battery cell group comprises two battery monomers arranged in the second direction, and the two battery monomers are electrically connected by the electrical connector; the insulating support is arranged between two adjacent battery cell groups; wherein the first direction intersects the second direction.

10. The battery pack of claim 7, wherein, The insulating support comprises a U-shaped support, the U-shaped support comprises a first support plate, a second support plate, and a third support plate; the first support plate and the second support plate are arranged on the battery monomer in the first direction, the third support plate extends in the second direction and connects the first support plate and the second support plate, and the third support plate is arranged opposite to the battery pack shell in the first direction.

11. The battery pack of claim 10, wherein, The battery pack further comprises an insulating support frame, the insulating support frame is arranged on the battery monomer; The first support plate is provided with a first flange on one side thereof away from the battery pack shell in the first direction; The second support plate is provided with a second flange on one side thereof away from the battery pack shell in the first direction; The first flange and the second flange are connected to the insulating support frame.

12. An electrical device, characterized by The power-using device comprises the battery pack according to any one of claims 1-11; wherein the power-using device comprises a vehicle.

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