Energy storage equipment

Abstract

The utility model relates to the technical field of energy storage, in particular to energy storage equipment, which comprises a box body provided with an inner cavity, and a battery core assembly is arranged in the inner cavity; the lifting piece is arranged in the inner cavity, and one end of the lifting piece is connected to the bottom wall of the box body; the battery cell assembly is located in the inner cavity, the battery cell assembly comprises a battery cell body and a first connecting part, the first connecting part is fixed to the battery cell body, and the first connecting part is fixed to the other end of the lifting part, so that a first gap is formed between the battery cell assembly and the bottom wall of the box body. When the energy storage equipment is transported, an external object collides with the box body, the first gap is kept between the battery cell assembly and the box body, the first gap can provide a deformation space for the box body, the risk of damaging the battery cell assembly is reduced, and the energy storage equipment is safer and more reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to an energy storage device. Background Art

[0002] The energy storage device includes a battery cell assembly and a box body. The box body is provided with an inner cavity, and the battery cell assembly is arranged in the inner cavity. The battery cell assembly is provided with a plurality of screw holes, and the wall surface of the inner cavity is provided with a plurality of through holes. One through hole corresponds to one screw hole, and a bolt passes through the through hole and is screwed into the screw hole to lock the battery cell assembly relative to the box body.

[0003] However, in the process of implementing the present utility model, the inventor found that when transporting the energy storage device, the energy storage device shakes, and an external object collides with the box body, which is further likely to damage the battery cell assembly, making the energy storage device have potential safety hazards. Summary of the Utility Model

[0004] The present utility model provides an energy storage device with good safety performance.

[0005] To solve the above technical problems, one technical solution adopted by the present utility model is: to provide an energy storage device, including a box body provided with an inner cavity, and a battery cell assembly arranged in the inner cavity; a lifting member arranged in the inner cavity, one end of the lifting member being connected to the bottom wall of the box body; a battery cell assembly located in the inner cavity, the battery cell assembly including a battery cell body and a first connecting portion, the first connecting portion being fixed to the battery cell body, and the first connecting portion being fixed to the other end of the lifting member, so that there is a first gap between the battery cell assembly and the bottom wall of the box body.

[0006] Optionally, the first connecting portion is provided with a first through hole; the lifting member is provided with a first screw hole; the energy storage device further includes a first bolt, and the first bolt passes through the first through hole and is screwed into the first screw hole.

[0007] Optionally, the lifting member includes a first fixing portion, a first bending portion and a straight portion. One end of the first fixing portion is connected to the bottom wall of the box body, the first bending portion is respectively connected to the other end of the first fixing portion and the straight portion, the first screw hole is arranged on the straight portion, and the first connecting portion is carried on the straight portion.

[0008] Optionally, the lifting member further includes a second fixing portion and a second bending portion. One end of the first bending portion is connected to the straight portion, the first bending portion and the second bending portion are arranged oppositely, the second fixing portion is connected to the second bending portion, and the second fixing portion is fixed to the bottom wall of the box body.

[0009] Optionally, the number of the lifting members and the first connecting portions is two, and the two first connecting portions are respectively fixed to two ends of the battery cell body; one first connecting portion is fixed to one lifting member.

[0010] Optionally, the box body has a first side wall and a second side wall, the first side wall and the second side wall are arranged adjacent to each other, and the lifting member is located on the first side wall; the energy storage device further includes a separator, the separator is arranged on the second side wall, and a second gap is formed between the box body and the battery cell assembly.

[0011] Optionally, the battery cell assembly extends a second connecting portion towards the separator, the second connecting portion is provided with a second through hole; the separator is provided with a second screw hole; the energy storage device further includes a second bolt, and the second bolt passes through the second through hole and is screwed to the second screw hole.

[0012] Optionally, the bottom wall of the box body is recessed towards the inner cavity, and a protruding supporting portion is formed on the bottom wall of the box body, and the battery cell assembly abuts against the supporting portion.

[0013] Optionally, the battery cell body includes a battery cell and an installation box, the installation box is provided with an installation space, the battery cell is arranged in the installation space, and the side wall of the installation box is recessed in a direction away from the battery cell to form a heat dissipation channel.

[0014] Optionally, the number of the battery cells is multiple; the installation box includes a partition board and a surrounding board, the surrounding board encloses the installation space, the partition board is arranged in the installation space, the partition board divides the installation space into a first cavity and a second cavity, part of the battery cells are arranged in the first cavity, and the other part of the battery cells are arranged in the second cavity. A first heat conduction channel is arranged on the surface of the partition board facing the first cavity, and a second heat conduction channel is arranged on the surface of the partition board facing the second cavity. Both the first heat conduction channel and the second heat conduction channel communicate with the heat dissipation channel.

[0015] The beneficial effects of the embodiments of the present application are as follows: An energy storage device is provided, which includes a battery cell assembly, a box body, a lifting member and a first bolt. The battery cell assembly extends a first connecting portion, the first connecting portion is provided with a first through hole, the box body is provided with an inner cavity, the battery cell assembly is arranged in the inner cavity, the lifting member is located between the battery cell assembly and the box body, one end of the lifting member is connected to the bottom wall of the inner cavity, and the lifting member is provided with a first screw hole. The first bolt passes through the first through hole and is screwed to the first screw hole. When transporting the energy storage device, an external object collides with the box body, and a first gap is maintained between the battery cell assembly and the box body. The first gap can provide a deformation space for the box body, reduce the risk of damaging the battery cell assembly, and make the energy storage device safer and more reliable. Description of the Drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for the embodiments of the present application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on the accompanying drawings.

[0017] Figure 1 is a view of the energy storage device provided by the present utility model in a three-dimensional state;

[0018] Figure 2 is an exploded view of the energy storage device provided by the present utility model in a three-dimensional state;

[0019] Figure 3 is provided by the present utility model Figure 2 an enlarged view of area A;

[0020] Figure 4 is an exploded view of the battery cell assembly provided by the present utility model in a three-dimensional state;

[0021] Figure 5 is provided by the present utility model Figure 4 an enlarged view of area B;

[0022] Figure 6 is a sectional view of the energy storage device provided by the present utility model.

[0023] Reference numerals:

[0024] 100, energy storage device;

[0025] 10, battery cell assembly; 11, battery cell body; 12, first connection part; 13, second connection part; 111, battery cell; 112, installation box; 11a, heat dissipation channel; 112a, installation space; 112a1, first cavity; 112a2, second cavity; 1121, partition board; 1122, enclosing board; 1121a, first heat conduction channel; 1121b, second heat conduction channel;

[0026] 20, lifting member; 21, first fixing part; 22, first bending part; 23, straight part; 24, second fixing part; 25, second bending part;

[0027] 30, box body; 30a, inner cavity; 31, first side wall; 32, second side wall; 33, support part; 40, isolation member. Detailed implementation manners

[0028] To facilitate the understanding of the present utility model, the present utility model will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are only for illustrative purposes.

[0029] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in this specification in the description of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0030] Please refer to Figures 1 - 2 , the energy storage device 100 includes a battery cell assembly 10, a lifting member 20 and a box body 30. The box body 30 is provided with an inner cavity 30a, the battery cell assembly 10 is disposed in the inner cavity 30a, the lifting member 20 is disposed in the inner cavity 30a, one end of the lifting member 20 is connected to the bottom wall of the box body 30, the battery cell assembly 10 is located in the inner cavity 30a, one end of the lifting member 20 is connected to the bottom wall of the box body 30, and the battery cell assembly 10 abuts against the other end of the lifting member 20, so that there is a first gap between the battery cell assembly 10 and the bottom wall of the box body 30. When the energy storage device 100 is transported, an external object collides with the box body 30, and the box body 30 deforms or elastically deforms toward the first gap. The first gap provides a deformation space for the box body 30, reducing the risk of damaging the battery cell assembly 10 when transporting the energy storage device 100, making the energy storage device 100 safer and more reliable, further solving the technical problem of easily damaging the battery cell assembly 10 in the prior art, and improving the safety factor of the energy storage device 100.

[0031] For the above battery cell assembly 10, please refer to Figure 3The battery cell assembly 10 includes a battery cell body 11 and a first connecting portion 12. The first connecting portion 12 is fixed to the battery cell body 11, and the first connecting portion 12 is fixed to the other end of the lifting member 20. Optionally, the first connecting portion 12 and the lifting member 20 are fixed, the first connecting portion 12 is provided with a first through hole, the lifting member 20 is provided with a first screw hole, and the energy storage device 100 further includes a first bolt, the first bolt passes through the first through hole and is screwed to the first screw hole, so that a detachable connection is formed between the first connecting portion 12 and the lifting member 20. Of course, the fixation between the first connecting part 12 and the lifting member 20 is not limited to the above-mentioned method, for example: the first connecting part 12 and the lifting member 20 are directly welded, riveted or clamped; by further illustrating by the clamping method, the first connecting part 12 includes a connecting section and a bending section, one end of the connecting section is connected to the battery cell body 11, and the bending section is connected to the other end of the connecting section, and the connecting section and the bending section are arranged at an angle so that the connecting section and the bending section are jointly enclosed to form a hook-shaped structure, and the lifting member 20 is provided with a connecting hole, which is inserted into the connecting hole through the hook-shaped structure, and the bending section of the hook-shaped structure passes through the connecting hole and abuts against the edge of the hole mouth of the connecting hole.

[0032] For cell body 11, see Figure 2 Combination Figure 4 The battery body 11 includes a battery 111 and an installation box 112. The installation box 112 is provided with an installation space 112a, and the battery 111 is arranged in the installation space 112a. The side wall of the installation box 112 is recessed in a direction away from the battery 111 to form a heat dissipation channel 11a. When the battery 111 generates heat, the heat dissipation channel 11a provides heat dissipation for the battery 111, thereby increasing the heat dissipation performance of the battery assembly 10.

[0033] In some embodiments, see Figure 4 Combination Figure 5 There are multiple battery cells 111, and the installation box 112 includes a partition 1121 and a surrounding plate 1122. The surrounding plate 1122 encloses an installation space 112a. The partition 1121 is arranged in the installation space 112a. The partition 1121 divides the installation space 112a into a first cavity 112a1 and a second cavity 112a2. Some battery cells 111 are arranged in the first cavity 112a1, and another part of the battery cells 111 are arranged in the second cavity 112a2. A first heat conduction channel 1121a is arranged on the surface of the partition 1121 facing the first cavity 112a1, and a second heat conduction channel 1121b is arranged on the surface of the partition 1121 facing the second cavity 112a2. The first heat conduction channel 1121a and the second heat conduction channel 1121b are both connected to the heat dissipation channel 11a. When the battery cell 111 generates heat, the heat is collected in the first heat conduction channel 1121a and the second heat conduction channel 1121b to the heat dissipation channel 11a and then discharged to the outside, so that the battery cell assembly 10 has a good heat dissipation effect.

[0034] Optionally, the battery cell assembly 10 further includes a fan (not shown in the figure). The fan is disposed in the heat dissipation channel 11a to extract the gas in the first heat conduction channel 1121a and the second heat conduction channel 1121b, accelerating the discharge of heat and enhancing the heat dissipation effect of the fan energy storage device 100.

[0035] For the above-mentioned lifting member 20, please refer to Figure 2 Combined with Figure 3 , the lifting member 20 includes a first fixing portion 21, a first bending portion 22, and a straight portion 23. The first fixing portion 21, the first bending portion 22, and the straight portion 23 are all in the shape of a thin plate. One end of the first fixing portion 21 is connected to the bottom wall of the box body 30. The first bending portion 22 is respectively connected to the other end of the first fixing portion 21 and the straight portion 23. The first screw hole is disposed on the straight portion 23, and the first connecting portion 12 is carried on the straight portion 23. The first fixing portion 21 in the shape of a thin plate is in surface contact with the bottom wall of the box body 30. When the lifting member 20 bears the weight of the battery cell assembly 10, the contact portion between the bottom wall of the box body 30 and the first fixing portion 21 shares the weight of the battery cell assembly 10 together, reducing the risk of deformation of the bottom wall of the box body 30.

[0036] In some embodiments, please refer to Figure 2 Combined with Figure 3 , the lifting member 20 further includes a second fixing portion 24 and a second bending portion 25. The second fixing portion 24 and the second bending portion 25 are both in the shape of a thin plate. One end of the first bending portion 22 is connected to the straight portion 23. The first bending portion 22 and the second bending portion 25 are disposed opposite to each other. The second fixing portion 24 is connected to the second bending portion 25, and the second fixing portion 24 is fixed to the bottom wall of the box body 30. The second fixing portion 24 in the shape of a thin plate is in surface contact with the bottom wall of the box body 30. When the lifting member 20 bears the weight of the battery cell assembly 10, the contact portion between the bottom wall of the box body 30 and the second fixing portion 24 shares part of the weight of the battery cell assembly 10 together, that is, the first fixing portion 21 and the second fixing portion 24 share the weight of the battery cell assembly 10 together, further reducing the risk of deformation of the bottom wall of the box body 30 and enhancing the stability of the battery cell assembly 10.

[0037] In some embodiments, the number of the lifting members 20 and the first connecting portions 12 is two. The two first connecting portions 12 are respectively fixed to both ends of the battery cell body 11; one first connecting portion 12 is fixed to one lifting member 20. The lifting members 20 jointly lift and support the battery cell assembly 10, further increasing the stability of the battery cell assembly 10.

[0038] For the above-mentioned box body 30, please refer to Figure 2, the bottom wall of the box body 30 is recessed towards the inner cavity 30a, and a protruding support portion 33 is formed on the bottom wall of the box body 30, and the battery cell assembly 10 abuts against the support portion 33. The support portion 33 functions to support the battery cell assembly 10, so that a gap is stably maintained between the battery cell assembly 10 and the bottom wall of the box body 30, reducing the risk of deformation of the battery cell assembly 10 towards the bottom wall of the box body 30. In addition, the support portion 33 also has a heat conduction function. When the temperature of the battery cell assembly 10 is higher than the temperature of the support portion 33, the temperature of the battery cell assembly 10 is conducted to the outside through the support portion 33, thereby achieving a heat dissipation effect.

[0039] The box body 30 has a first side wall 31 and a second side wall 32. There are two first side walls 31 and two second side walls 32. The first side wall 31 and the second side wall 32 are arranged adjacent to each other, that is, the two first side walls 31 are arranged opposite to each other, and the two second side walls 32 are arranged opposite to each other. The lifting member 20 is located on the first side wall 31.

[0040] For the above energy storage device 100, an isolation member 40 is further included. Please refer to Figure 6 , the isolation member 40 is arranged on the second side wall 32, and the isolation member 40 is located between the box body 30 and the battery cell assembly 10, so that a second gap is formed between the box body 30 and the battery cell assembly 10. When an external object impacts the box body 30, the box body 30 deforms or elastically deforms towards the second gap. The second gap provides a deformation space for the box body 30, reducing the risk of damaging the battery cell assembly 10 when transporting the energy storage device 100, making the energy storage device 100 safer and more reliable. Optionally, the isolation member 40 has a hollow square columnar structure, and the hollow isolation member 40 can also provide a deformation space for the box body 30, further increasing the safety of the battery cell assembly 10 and reducing the risk of damaging the battery cell assembly 10.

[0041] For the connection between the isolation member 40 and the battery cell assembly 10, please refer to Figure 6 , the battery cell assembly 10 extends a second connecting portion 13 towards the isolation member 40. The second connecting portion 13 is provided with a second through hole, and the isolation member 40 is provided with a second screw hole. The energy storage device 100 further includes a second bolt (not shown in the figure). The second bolt passes through the second through hole and is screwed into the second screw hole.

[0042] Optionally, a third gap is maintained between the battery cell assembly 10 and the second side wall 32. When an external object impacts the box body 30, the box body 30 deforms or elastically deforms towards the third gap. The third gap provides a deformation space for the box body 30, reducing the risk of damaging the battery cell assembly 10 when transporting the energy storage device 100.

[0043] In an embodiment of the present application, an energy storage device 100 is provided. The energy storage device 100 includes a battery cell assembly 10, a lifting member 20, and a box body 30. The box body 30 is provided with an inner cavity 30a. The battery cell assembly 10 is disposed in the inner cavity 30a, and the lifting member 20 is disposed in the inner cavity 30a. One end of the lifting member 20 is connected to the bottom wall of the box body 30. The battery cell assembly 10 is located in the inner cavity 30a. The battery cell assembly 10 includes a battery cell body 11 and a first connection portion 12. The first connection portion 12 is fixed to the battery cell body 11, and the first connection portion 12 is fixed to the other end of the lifting member 20, so that a first gap is formed between the battery cell assembly 10 and the bottom wall of the box body 30. When the energy storage device 100 is transported, an external object collides with the box body 30, and there is a gap between the battery cell assembly 10 and the box body 30. The gap can provide a deformation space for the box body 30, reducing the risk of damaging the battery cell assembly 10 and making the energy storage device 100 safer and more reliable.

[0044] It should be noted that the description and drawings of the present invention have given preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments are not additional limitations to the content of the present invention. The purpose of providing these embodiments is to make the understanding of the disclosed content of the present invention more thorough and comprehensive. Moreover, the above technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as within the scope described in the description of the present invention. Further, for those of ordinary skill in the art, improvements or changes can be made according to the above description, and all such improvements and changes should fall within the protection scope of the appended claims of the present invention.

Claims

1. An energy storage device, characterized in that: include: The box body is provided with an inner cavity, and the battery cell assembly is arranged in the inner cavity; A lifting member is disposed in the inner cavity, and one end of the lifting member is connected to the bottom wall of the box body; A battery cell assembly is located in the inner cavity, and the battery cell assembly includes a battery cell body and a first connecting portion, wherein the first connecting portion is fixed to the battery cell body, and the first connecting portion is fixed to the other end of the lifting member so that a first gap is provided between the battery cell assembly and the bottom wall of the box body.

2. The energy storage device according to claim 1, characterized in that: The first connecting portion is provided with a first through hole; The lifting member is provided with a first screw hole; The energy storage device further includes a first bolt, which passes through the first through hole and is screwed into the first screw hole.

3. The energy storage device according to claim 2, characterized in that: The lifting member includes a first fixing portion, a first bending portion and a straight portion, one end of the first fixing portion is connected to the bottom wall of the box body, the first bending portion is respectively connected to the other end of the first fixing portion and the straight portion, the first screw hole is arranged in the straight portion, and the first connecting portion is supported by the straight portion.

4. The energy storage device according to claim 3, characterized in that: The lifting member also includes a second fixing portion and a second bending portion, one end of the first bending portion is connected to the straight portion, the first bending portion and the second bending portion are arranged opposite to each other, the second fixing portion is connected to the second bending portion, and the second fixing portion is fixed to the bottom wall of the box body.

5. The energy storage device according to claim 1, characterized in that: There are two lifting members and two first connecting parts, and the two first connecting parts are respectively fixed at two ends of the battery cell body; A first connecting portion is fixed to a lifting member.

6. The energy storage device according to claim 1, characterized in that: The box body has a first side wall and a second side wall, the first side wall is arranged adjacent to the second side wall, and the lifting member is located on the first side wall; The energy storage device further includes an isolating member, which is disposed on the second side wall, and a second gap is formed between the box body and the battery cell assembly.

7. The energy storage device according to claim 6, characterized in that: The battery cell assembly has a second connecting portion extending toward the isolation member, and the second connecting portion is provided with a second through hole; The isolating member is provided with a second screw hole; The energy storage device further includes a second bolt, which passes through the second through hole and is screwed into the second screw hole.

8. The energy storage device according to claim 1, characterized in that: The bottom wall of the box body is recessed toward the inner cavity, and a protruding support portion is formed on the bottom wall of the box body, and the battery cell assembly is supported by the support portion.

9. The energy storage device according to any one of claims 1 to 8, characterized in that: The battery cell body comprises a battery cell and an installation box, the installation box is provided with an installation space, the battery cell is arranged in the installation space, and the side wall of the installation box is recessed in a direction away from the battery cell to form a heat dissipation channel.

10. The energy storage device according to claim 9, characterized in that: The number of the battery cells is multiple; The installation box includes a partition and a surrounding plate, the surrounding plate encloses the installation space, the partition is arranged in the installation space, the partition divides the installation space into a first cavity and a second cavity, part of the battery cells are arranged in the first cavity, and the other part of the battery cells are arranged in the second cavity, the surface of the partition facing the first cavity is provided with a first heat conduction channel, and the surface of the partition facing the second cavity is provided with a second heat conduction channel, and the first heat conduction channel and the second heat conduction channel are both connected to the heat dissipation channel.

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