Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment, the battery pack comprises a box body and a battery cell group, the battery cell group is installed between two side plates of the box body in a heat conduction manner, at least one side plate comprises a plurality of fins, and the plurality of fins extend along the length direction of the box body and are arranged at intervals along the height direction of the box body; and the battery cell group dissipates heat through the fins in the side plates, so that heat dissipation devices such as harmonica-shaped tubes and axial fans are removed, the operation power consumption is reduced, and the overall size of the battery pack is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to a battery pack and electrical equipment. Background Art

[0002] In the related art, the battery pack adopts a module-in-box process. The module is composed of aluminum end plates, harmonica tubes, steel belts, etc. After the module is put into the box, an axial fan is used to supply or exhaust air in front of the box to remove heat. This process has many structural parts, a complex production process, and low efficiency. The fan will increase the operating power consumption of the battery pack and reduce efficiency. At the same time, harmonica tubes for heat dissipation are sandwiched between the battery cells in the module, resulting in a larger box size.

[0003] Therefore, the battery pack in the related art has technical problems of high operating power consumption and large battery pack size. Utility Model Content

[0004] The embodiments of the present utility model provide a battery pack and an electrical device, which can improve the technical problems of high operating power consumption and large battery pack size in the prior art.

[0005] In a first aspect, an embodiment of the present invention provides a battery pack, comprising:

[0006] The box body comprises a bottom plate and at least two side plates connected to the bottom plate, wherein the at least two side plates extend along the length direction of the box body and are arranged opposite to each other in the width direction of the box body;

[0007] At least one battery cell group, each of the battery cell groups comprising a plurality of battery cells arranged along the length direction of the box and spaced apart from each other, and thermally mounted between two adjacent side plates;

[0008] Wherein, at least one of the side plates includes a plurality of fins, and the plurality of fins are extended along the length direction of the box body and spaced apart along the height direction of the box body.

[0009] In one embodiment, the box body further includes an end plate connected to the end of the bottom plate and the ends of at least two side plates, and a first through hole is provided on the end plate, and the first through hole is aligned with the corresponding fin.

[0010] In one embodiment, in the same side plate, ventilation holes are formed between two adjacent fins, and at least two of the ventilation holes are connected to the first through hole.

[0011] In one embodiment, the battery pack further includes a continuously arranged adhesive structure, and each of the battery cell groups is thermally connected between the corresponding two adjacent side plates through the adhesive structure, and the adhesive structure covers the top surface and side surfaces of at least one of the battery cells.

[0012] In one embodiment, in the same battery cell group, buffer members are provided on the bottom and side surfaces of at least one battery cell, so that gaps are formed between at least one battery cell and the bottom plate and between two adjacent battery cells, and the glue structure fills the gaps.

[0013] In one embodiment, each of the battery cells includes a battery cell explosion-proof valve, and a plurality of second through holes are provided on the top of the glue structure, and each of the second through holes exposes the corresponding battery cell explosion-proof valve.

[0014] In one embodiment, there are two battery cell groups, the two battery cell groups include a first battery cell group and a second battery cell group, there are three side panels, the three side panels include a first side panel, a third side panel and a second side panel located between the first side panel and the third side panel, the first battery cell group is installed between the first side panel and the second side panel, and the second battery cell group is installed between the second side panel and the third side panel; wherein, the battery pack further includes a first output row and a second output row, one end of the first output row is connected to the first battery cell group, and the other first end of the first output row is close to the third side panel, one end of the second output row is connected to the second battery cell group, and the other second end of the second output row is close to the third side panel.

[0015] In one embodiment, a limiting member and a notch are provided on the top of the second side plate, and the first output row passes through the notch and is located between the bottom wall of the notch and the limiting member.

[0016] In one embodiment, the first output row includes a first portion, a third portion, and a second portion bent between the first portion and the third portion; wherein the first portion is connected between the first battery cell group and the second portion, the second portion passes through the gap, and the third portion is close to the third side plate; the second portion is located above the first portion and the third portion, and the second output row is located on a side of the third portion away from the third side plate and below the second portion.

[0017] In a second aspect, an embodiment of the present invention provides an electrical device comprising a battery pack as described in any of the above embodiments.

[0018] Beneficial effects of the embodiments of the present utility model:

[0019] In the embodiment of the present application, the battery cells in the battery cell group are arranged along the length direction and are installed between the corresponding adjacent two side plates in a heat-conducting manner, so that the heat dissipation efficiency is improved, the heat dissipation devices such as harmonica tubes and axial fans are removed, the operation power consumption is reduced, the overall size of the battery pack is reduced, and the technical problems of large operation power consumption and large size of the battery pack in the prior art are improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0021] Figure 1 is a perspective view of the battery pack provided by the embodiment of the present application;

[0022] Figure 2 is an exploded view of the battery pack provided by the embodiment of the present application;

[0023] Figure 3 is a perspective view of the box of the battery pack provided by the embodiment of the present application;

[0024] Figure 4 is a front view in the three views of the battery pack provided by the embodiment of the present application;

[0025] Figure 5 is a top view in the three views of the battery pack provided by the embodiment of the present application;

[0026] Figure 6 is a side view in the three views of the battery pack provided by the embodiment of the present application;

[0027] Figure 7 is Figure 2 is a schematic view of the battery pack provided by the embodiment of the present application in the top direction. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0029] See also Figures 1 to 7 The battery pack provided by an embodiment of the present invention includes a box body and at least one battery cell group 3. The box body includes a bottom plate 1 and at least two side plates 2 connected to the bottom plate 1. The at least one battery cell group 3 includes a plurality of battery cells 31 arranged along the length direction of the box body and spaced apart from each other, and is heat-conductively installed between the corresponding two adjacent side plates 2. At least one side plate 2 includes a plurality of fins 4. The plurality of fins 4 extend along the length direction of the box body and are spaced apart along the height direction of the box body.

[0030] Wherein, at least two of the side panels 2 extend along the length direction of the box body and are arranged opposite to each other in the width direction of the box body.

[0031] In this embodiment, since the battery cell group 3 is heat-conductingly installed between the two adjacent side panels 2, the battery cell group 3 dissipates heat through the fins 4 in the side panels 2, thereby eliminating heat dissipation devices such as harmonica tubes and axial fans, which not only reduces the operating power consumption, but also reduces the overall size of the battery pack, alleviating the technical problems of high operating power consumption and large battery pack size in the prior art.

[0032] The technical solution of this application is now described in conjunction with specific embodiments.

[0033] In one embodiment, see Figure 3 The box body also includes an end plate 5, which is connected to the end of the bottom plate 1 and the ends of at least two side plates 2. The end plate 5 is provided with a first through hole 9, which is aligned with the corresponding fin 4.

[0034] The end plate 5 includes a front end plate 51 located on one side of the box body and a rear end plate 52 located on the other side of the box body.

[0035] The first through hole 9 can be selectively provided on at least one of the front plate 51 and the rear plate 52 .

[0036] It is understandable that by opening holes in the end plate 5 aligned with the fins 4 , airflow can be easily introduced into the fins 4 to carry away heat, thereby enhancing the heat dissipation efficiency of the fins 4 to the chipset.

[0037] In this embodiment, first through holes 9 are provided on the end plate 5 opposite to the fins 4 , and airflow is allowed to flow between the fins 4 through the first through holes 9 , thereby enhancing the heat dissipation efficiency of the fins 4 for the chipset.

[0038] In one embodiment, see Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 In the same side plate 2 , ventilation holes are formed between two adjacent fins 4 , and at least two ventilation holes are connected to the first through hole 9 .

[0039] The adjacent fins 4 are arranged at equal intervals along the thickness direction of the box.

[0040] Among them, adjacent fins 4 can also be connected by heat conduction, and heat exchange can be carried out between different fins 4, which can avoid heat accumulation on a certain fin 4.

[0041] It is understandable that the ventilation hole can be opposite to and connected to the first through hole 9, so that the airflow of the first through hole 9 can pass through the ventilation hole and better remove the heat from the adjacent fins 4 on both sides of the ventilation hole.

[0042] In this embodiment, the ventilation holes can further improve the heat dissipation efficiency of the fins 4 .

[0043] In one embodiment, see Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 The battery pack also includes a continuously arranged adhesive structure 6, each battery cell group 3 is thermally connected between the corresponding adjacent two side plates 2 through the adhesive structure 6, and the adhesive structure 6 covers the top surface and side surfaces of at least one battery cell 31.

[0044] Each battery cell 31 is wrapped by the adhesive structure 6 to form a heat-conducting whole, so that the temperature rise data of each battery cell 31 is consistent, which is also conducive to improving the heat dissipation uniformity of each battery cell 31.

[0045] Among them, the battery pack also includes a CCS integrated busbar. The adhesive structure 6 wraps the CCS integrated busbar, so that the CCS integrated busbar is isolated from the outside world, which can avoid the impact of short circuit caused by air-conditioning condensation.

[0046] In this embodiment, the continuous and integrally arranged adhesive structure 6 can, on the one hand, make the temperature rise data of each battery cell 31 consistent; on the other hand, the heat dissipation of the battery cell group 3 is achieved by utilizing the heat conduction between the adhesive structure 6 and the fins 4, and heat dissipation devices such as harmonica tubes and axial fans can be eliminated, thereby improving the heat dissipation efficiency while reducing the size and power consumption of the battery pack.

[0047] In one embodiment, the adhesive structure 6 is made of AB adhesive.

[0048] Among them, AB glue plays the role of fixation and heat conduction.

[0049] The AB glue includes the glue and the hardener, and the glue and the hardener are mixed to achieve the hardening of the glue structure 6 .

[0050] It is understandable that the material for preparing the adhesive structure 6 can also be selected as any one or more of structural adhesive, thermal conductive adhesive, and potting adhesive, which can be selected according to the specific process.

[0051] In one embodiment, see Figure 7 In the same battery cell group 3, a buffer member 7 is provided on the bottom and side surfaces of at least one battery cell 31, so that a gap is formed between at least one battery cell 31 and the bottom plate 1 and between two adjacent battery cells 31, and the glue structure 6 is filled in the gap.

[0052] The buffer member 7 may be made of a buffer material, and the buffer member 7 can prevent collision damage between adjacent battery cells 31 , and between the battery cells 31 and the side plate 2 and the bottom plate 1 .

[0053] It can be understood that the buffer part 7 also has the function of blocking adjacent battery cells 31, battery cells 31 and the bottom plate 1 and side plate 2, so that there are gaps between adjacent battery cells 31, battery cells 31 and the bottom plate 1 and side plate 2, making it easier for the glue structure 6 to pass through the gap to wrap the battery cell 31.

[0054] In this embodiment, the buffer member 7 is used to ensure that there is a certain gap between the battery cells 31 and the battery cells 31, and between the battery cells 31 and the side panels 2 and the bottom panel 1, so as to ensure that each battery cell 31 can be wrapped by the glue structure 6 during subsequent glue filling.

[0055] In one embodiment, each battery cell 31 includes a battery cell explosion-proof valve 8 , and a plurality of second through holes 10 are provided on the top of the glue structure 6 , each second through hole 10 exposing a corresponding battery cell explosion-proof valve 8 .

[0056] The size of the second through hole 10 is greater than or equal to the size of the battery cell explosion-proof valve 8 .

[0057] It can be understood that the battery cell explosion-proof valve 8 is used to discharge the gas in the battery cell 31 to prevent the battery cell 31 from exploding. Exposing the battery cell explosion-proof valve 8 through the second through hole 10 can prevent the glue structure 6 from blocking the air outlet of the battery cell explosion-proof valve 8, which is conducive to the normal operation of the battery cell explosion-proof valve 8.

[0058] In this embodiment, by removing the glue structure 6 above the battery cell explosion-proof valve 8 and forming the second through hole 10 , the vent hole of the battery cell explosion-proof valve 8 is prevented from being blocked by the glue structure 6 and becoming ineffective.

[0059] In one embodiment, see Figure 1 、 Figure 2 、 Figure 7 There are two battery cell groups 3, the two battery cell groups 3 include a first battery cell group 3 and a second battery cell group 3, there are three side panels 2, the three side panels 2 include a first side panel 21, a third side panel 23 and a second side panel 22 located between the first side panel 21 and the third side panel 23, the first battery cell group 3 is installed between the first side panel 21 and the second side panel 22, and the second battery cell group 3 is installed between the second side panel 22 and the third side panel 23; wherein, the battery pack also includes a first output row 13 and a second output row 14, one end of the first output row 13 is connected to the first battery cell group 3, and the other first end 15 of the first output row 13 is close to the third side panel 23, one end of the second output row 14 is connected to the second battery cell group 3, and the other second end 19 of the second output row 14 is close to the third side panel 23.

[0060] A plurality of battery cells 31 are connected in series between the first output row 13 and the second output row 14 .

[0061] It can be understood that by placing the first end 15 and the second end 19 of the first output row 13 and the second output row 14, which are respectively in contact with the end plate 5, close to the third side plate 23 and adjacent to each other, the distance between the first end 15 of the first output row 13 and the second end 19 of the second output row 14 can be shortened, thereby facilitating electrical connection between the battery pack and the external circuit.

[0062] In this embodiment, the distance between the first end 15 and the second end 19 of the first output row 13 and the second output row 14 contacting the end plate 5 respectively is shortened, so as to facilitate electrical connection between the battery pack and the external circuit.

[0063] In one embodiment, see Figure 1 、 Figure 3 A limiting member 11 and a notch 12 are provided on the top of the second side plate 22 . The first output row 13 passes through the notch 12 and is located between the bottom wall of the notch 12 and the limiting member 11 .

[0064] The limiting member 11 is used to prevent the first output row 13 from falling out of the notch 12 .

[0065] The notch 12 is used to hide the first output row 13 , allowing the first output row 13 to pass through the second side plate 22 , and placing the other first end 15 of the first output row 13 close to the third side plate 23 .

[0066] In one embodiment, the first output row 13 includes a first portion 131, a third portion 133, and a second portion 132 connected in a bent manner between the first portion 131 and the third portion 133; wherein the first portion 131 is connected between the first battery cell group 3 and the second portion 132, the second portion 132 passes through the notch 12, and the third portion 133 is close to the third side plate 23; the second portion 132 is located above the first portion 131 and the third portion 133, and the second output row 14 is located on a side of the third portion 133 away from the third side plate 23 and below the second portion 132.

[0067] In one embodiment, see Figure 3 The top surface of the box is hollowed out.

[0068] It can be understood that the top surface of the box is hollow and there is no need to set a top plate. On the one hand, the adhesive structure 6 can replace the role of the top plate. On the other hand, in a structure in which multiple battery packs are stacked longitudinally, two adjacent battery packs along the thickness direction can share a bottom plate 1, that is, the bottom plate 1 of the upper battery pack in the two adjacent battery packs can be shared as the top plate of the lower battery pack.

[0069] In this embodiment, the top plate of the battery pack is removed. On the one hand, this facilitates the glue filling and formation of the glue structure 6 , and on the other hand, it saves materials and simplifies the structure.

[0070] In one embodiment, the bottom plate 1 and the side plates 2 of the box body may be an integrally formed structure.

[0071] The box body may be made of aluminum.

[0072] It can be understood that the fins 4 are arranged inside the side panel 2, the outer surface of the fins 4 contacts the inner surface of the side panel 2, and the glue structure 6 contacts the outer surface of the side panel 2, so that the glue structure 6 can extract the heat of the battery cell 31 and conduct it to the fins 4 through the side panel 2 for heat dissipation.

[0073] In one embodiment, see Figure 3 The battery pack includes a cell 31 setting area and a wiring setting area located on both sides of the partition 18. The cell 31 setting area is arranged close to the front end plate 51 relative to the wiring setting area. A handle 16 is also provided on the outer surface of the front end plate 51, and the box body is moved by the handle 16.

[0074] It can be understood that the battery cell 31 setting area includes multiple battery cell groups 3, and the wiring setting area includes BMU, series rows 17, and insulating sheets 20. The series rows 17 are arranged on the insulating sheet 20 at intervals and are connected to the battery cells 31 below through vias passing through the insulating sheet 20. When the wiring setting area needs to be repaired, the battery pack is pulled out through the handle 16. Since the top surface of the battery pack is hollow, the wiring setting area of ​​the battery pack can be directly repaired.

[0075] In a second aspect, an embodiment of the present invention provides an electrical device, comprising a battery pack as described in any of the above embodiments.

[0076] On the third aspect, an embodiment of the present invention provides a battery pack stacking structure, comprising a plurality of battery packs as in any of the above embodiments, wherein the plurality of battery packs are stacked on each other, and in two adjacent battery packs along the stacking direction, the bottom plate 1 of one battery pack covers the top surface of the other battery pack.

[0077] The utility model provides a battery pack, in which fins 4 for heat dissipation are arranged in the side panels 2 of the box body, and the fins 4 are thermally connected to the battery cell group 3, thereby eliminating the need for harmonica tubes and axial fans, reducing the size of the battery pack, reducing power loss, and improving power conversion efficiency.

[0078] In addition, by continuously wrapping the battery cells 31 with the adhesive structure 6 , the temperature rise data of the battery cells 31 can be made consistent.

[0079] In addition, since the battery pack of the present invention does not adopt the method of inserting modules into the box, but directly inserts the battery cells 31 into the box, the use of structural parts is reduced and the assembly efficiency is improved.

[0080] In addition, the box is integrated after glue filling, and the battery pack can withstand large extrusion pressure in all directions.

[0081] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, based on the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A battery pack, characterized in that: include: The box body comprises a bottom plate and at least two side plates connected to the bottom plate, wherein the at least two side plates extend along the length direction of the box body and are arranged opposite to each other in the width direction of the box body; At least one battery cell group, each of the battery cell groups comprising a plurality of battery cells arranged along the length direction of the box and spaced apart from each other, and thermally mounted between two adjacent side plates; Wherein, at least one of the side plates includes a plurality of fins, and the plurality of fins are extended along the length direction of the box body and spaced apart along the height direction of the box body.

2. The battery pack according to claim 1, wherein: The box body further includes an end plate connected to the end of the bottom plate and the end of at least two side plates. The end plate is provided with a first through hole, and the first through hole is aligned with the corresponding fin.

3. The battery pack according to claim 2, wherein: In the same side plate, ventilation holes are formed between two adjacent fins, and at least two of the ventilation holes are communicated with the first through hole.

4. The battery pack according to claim 1, wherein: The battery pack further includes a continuously arranged adhesive structure, and each of the battery cell groups is thermally connected between two corresponding adjacent side plates through the adhesive structure, and the adhesive structure covers the top surface and side surfaces of at least one of the battery cells.

5. The battery pack according to claim 4, characterized in that: In the same battery cell group, buffer members are provided on the bottom and side surfaces of at least one battery cell, so that gaps are formed between at least one battery cell and the bottom plate and between two adjacent battery cells, and the glue structure is filled in the gaps.

6. The battery pack according to claim 4, characterized in that: Each of the battery cells includes a battery cell explosion-proof valve, and a plurality of second through holes are provided on the top of the glue structure, and each of the second through holes exposes the corresponding battery cell explosion-proof valve.

7. The battery pack according to claim 1, wherein: There are two battery cell groups, the two battery cell groups include a first battery cell group and a second battery cell group, there are three side panels, the three side panels include a first side panel, a third side panel and a second side panel located between the first side panel and the third side panel, the first battery cell group is installed between the first side panel and the second side panel, and the second battery cell group is installed between the second side panel and the third side panel; wherein, the battery pack also includes a first output row and a second output row, one end of the first output row is connected to the first battery cell group, and the other first end of the first output row is close to the third side panel, one end of the second output row is connected to the second battery cell group, and the other second end of the second output row is close to the third side panel.

8. The battery pack according to claim 7, characterized in that: A limiting member and a notch are provided on the top of the second side plate. The first output row passes through the notch and is located between the bottom wall of the notch and the limiting member.

9. The battery pack according to claim 8, characterized in that: The first output row includes a first part, a third part and a second part bent between the first part and the third part; wherein, the first part is connected between the first battery cell group and the second part, the second part passes through the gap, and the third part is close to the third side plate; the second part is located above the first part and the third part, and the second output row is located on the side of the third part away from the third side plate and below the second part.

10. An electrical device, characterized in that: Comprising the battery pack according to any one of claims 1 to 9.

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