CN-122025930-A - Battery device, energy storage system, power utilization device and charging network

Abstract

The application belongs to the technical field of battery production, and provides a battery device, an energy storage system, an electricity utilization device and a charging network. The heat exchange substrate comprises a first plate body and a second plate body, the end face of the first plate body, which is away from the second plate body, is a plane, and the upper cover is covered on the end face of the first plate body, which is away from the second plate body. According to the battery device provided by the application, the first plate body of the heat exchange substrate is used as the bottom plate covered with the upper cover, so that the accommodating space for accommodating the battery monomer assembly is formed by enclosing. The battery cell assembly is arranged on the first planar plate body, and meanwhile, the reinforcing assembly for supporting and reinforcing is arranged on the end face of the second plate body, which is away from the first plate body, so that the volume of the battery cell assembly in the accommodating space is larger, that is, the space utilization rate in the accommodating space is higher.

Inventors

• DAI YUNLONG

Assignees

• 宁德时代新能源科技股份有限公司

Dates

Publication Date

20260512

Application Date

20241107

Claims (20)

1. 1. A battery device, characterized by comprising: a battery cell assembly; An upper cover; the heat exchange substrate comprises a first plate body and a second plate body which are mutually covered to form a heat exchange cavity, the first plate body is a flat plate, and the upper cover is covered on the end face of the first plate body, which is away from the second plate body, so as to enclose and form a containing space for containing the battery cell assembly.
2. 2. The battery device of claim 1, wherein the battery device comprises a reinforcing component, wherein the reinforcing component is arranged on one side of the second plate body, which is away from the upper cover, and is used for bearing the first plate body and the second plate body.
3. 3. The battery device of claim 2, wherein the reinforcement assembly comprises two stringer structures, each of the stringer structures extending in a first direction and the two stringer structures being spaced apart in a second direction; in the third direction, at least part of the longitudinal beam structure is positioned below the battery cell assembly, the first direction, the second direction and the third direction are perpendicular to each other, and the third direction is the thickness direction of the heat exchange substrate.
4. 4. The battery device of claim 3, wherein the second plate body is provided with a groove, the groove and the first plate body are combined to form the heat exchange cavity, and in the third direction, the projection of the longitudinal beam structure is staggered with the projection of the heat exchange cavity.
5. 5. The battery device of claim 3 or 4, wherein the reinforcement assembly includes a first fastener, the stringer structure has a first top end surface, the first plate is disposed on the first top end surface, and the first fastener sequentially passes through the first plate and the first top end surface.
6. 6. The battery device of claim 5, wherein the rail structure has a second top end surface, the second top end surface being lower than the first top end surface, and wherein a difference in height between the first top end surface and the second top end surface in the third direction is configured to accommodate the second plate body.
7. 7. The battery device of claim 6, wherein the thickness of the second plate body in the third direction is less than or equal to a difference in height between the first top end surface and the second top end surface.
8. 8. The battery device of claim 6, wherein a first adhesive layer is applied between the second plate and the second top surface.
9. 9. The battery device according to any one of claims 3 to 8, wherein the side member structure includes a beam main body portion having a first cavity and a beam support portion extending from the beam main body portion in the second direction, the beam support portion having a second cavity, the first cavity and the second cavity being not in communication with each other.
10. 10. The battery device of claim 9, wherein the thickness of the beam support portion is smaller than the thickness of the beam main body portion in the third direction.
11. 11. The battery device according to claim 9, wherein the beam body portion has a first vertical side, a second vertical side spaced apart from the first vertical side, and two first lateral sides connecting the first vertical side and the second vertical side, respectively, the first vertical side, the second vertical side, and the two first lateral sides are enclosed to form the first cavity, and the beam support portion has a third vertical side and two second lateral sides connecting the third vertical side and the second vertical side, respectively, the second vertical side, the third vertical side, and the two second lateral sides are enclosed to form the second cavity.
12. 12. The battery device of claim 9, wherein in the third direction, the projection of the beam support coincides with the projected portion of the battery cell assembly, and the projection of the beam support does not coincide with the projection of the heat exchange cavity.
13. 13. The battery device of any one of claims 9 to 12, wherein the reinforcement assembly includes a plurality of reinforcement beams connected between the beam supports of two of the stringer structures, each reinforcement beam extending in the second direction and being spaced apart in the first direction.
14. 14. The battery device according to claim 13, wherein a step is formed between a bottom end surface of the beam main body portion and a bottom end surface of the beam support portion in the third direction, the end portion of the reinforcing beam being located in the step, the bottom end surface of the reinforcing beam facing away from the beam support portion being higher than the bottom end surface of the beam main body portion.
15. 15. The battery device of claim 13 or 14, wherein the reinforcement assembly comprises a second fastener, the first plate body is provided with a through hole, the second plate body is provided with a counter bore, the second fastener penetrates through the counter bore and the reinforcement beam and connects the second plate body and the reinforcement beam, and the end face of the second fastener is lower than the end face of the first plate body.
16. 16. The battery device of claim 15, wherein the second fastener comprises a rivet stem and a cap body arranged on the rivet stem, the cap body is abutted against the second plate body, a second adhesive layer is arranged between the cap body and the second plate body, and the rivet stem penetrates through the counter bore to be connected with the reinforcing beam.
17. 17. The battery device of claim 9, wherein the reinforcement assembly includes a plurality of press blocks, each of the press blocks being disposed on the beam body portion at intervals along the first direction, and the first plate body being provided with a relief notch through which the press block is disposed.
18. 18. The battery device of claim 17, wherein the height of each of the compacts decreases gradually in the first direction.
19. 19. The battery device of any one of claims 3 to 18, wherein the battery device includes a slider disposed at a bottom of the rail structure and extending in the first direction.
20. 20. The battery device of any one of claims 13 to 19, wherein the battery device comprises two module beams, each of the module beams is disposed on the first plate body, each of the module beams extends along the second direction and is spaced apart along the first direction, and the battery cell assembly is disposed between the two module beams.

Description

Battery device, energy storage system, power utilization device and charging network Technical Field The present application relates to the field of battery production technologies, and in particular, to a battery device, an energy storage system, an electricity consumption device, and a charging network. Background In the technical field of battery devices, the battery devices comprise an upper box body, a battery monomer assembly formed by a plurality of battery monomers, a roll pressing beam, a water cooling plate and a stiffening beam, wherein the roll pressing beam and the stiffening beam are respectively arranged on two opposite sides of the water cooling plate, an upper box body cover is arranged on the roll pressing beam, the upper box body, the roll pressing beam and the water cooling plate enclose to form a containing space for containing the battery monomer assembly, and the roll pressing beam and the stiffening beam are both used for providing structural support and improving the integral structural strength of the battery devices. However, the production process of the above-described structural form of the water-cooled plate is complicated. Disclosure of Invention The application aims to provide a battery device, an energy storage system, an electric device and a charging network, and aims to solve the technical problem that a production process of a water cooling plate of the battery device is complex. In a first aspect, the present application provides a battery device comprising: a battery cell assembly; An upper cover; the heat exchange substrate comprises a first plate body and a second plate body which are mutually covered to form a heat exchange cavity, the first plate body is a flat plate, and the upper cover is covered on the end face of the first plate body, which is away from the second plate body, so as to enclose and form a containing space for containing the battery cell assembly. The battery device provided by the invention has the beneficial effects that the first plate body of the heat exchange substrate is used as the bottom plate covered with the upper cover, so that the accommodating space for accommodating the battery monomer assembly is formed by enclosing. On one hand, the first plate body is a flat plate, the heat exchange cavity is formed by stamping the groove in the second plate body, the production process is simple, the cost is low, and on the other hand, the upper cover and the heat exchange substrate are directly and hermetically connected, so that the sealing interface is reduced, and the sealing reliability of the battery device is improved. In one embodiment, the battery device comprises a reinforcing component, wherein the reinforcing component is arranged on one side of the second plate body, which is away from the upper cover, and is used for bearing the first plate body and the second plate body. Through adopting above-mentioned technical scheme, utilize the enhancement subassembly to support and consolidate heat exchange substrate to promote heat exchange substrate to battery monomer subassembly support reliability. In one embodiment, the reinforcement assembly includes two stringer structures, each of the stringer structures extending in a first direction and the two stringer structures being spaced apart in a second direction; in the third direction, at least part of the longitudinal beam structure is positioned below the battery cell assembly, the first direction, the second direction and the third direction are perpendicular to each other, and the third direction is the thickness direction of the heat exchange substrate. Through adopting above-mentioned technical scheme, utilize each longeron structure to support battery monomer subassembly to promote the holistic structural strength of heat exchange base plate. In one embodiment, the second plate body is provided with a groove, the groove and the first plate body are combined to form the heat exchange cavity, and in the third direction, the projection of the longitudinal beam structure is staggered with the projection of the heat exchange cavity. Through adopting above-mentioned technical scheme, the position that sets up of longeron structure can not cause the extrusion to heat exchange cavity to satisfy heat exchange cavity space integrity's demand, and, only set up the recess on the second plate body, and there is not the cavity setting on the first plate body, heat exchange substrate's production process is less, low in manufacturing cost. In one embodiment, the reinforcement assembly includes a first fastener, the stringer structure has a first top end surface, the first panel is disposed on the first top end surface, and the first fastener sequentially penetrates the first panel and the first top end surface. Through adopting above-mentioned technical scheme, utilize first fastener in order to realize longeron structure and first plate body and be connected, can promote the stability that the t