CN-224232730-U - Energy storage device, energy storage system and charging network

Abstract

The application relates to the technical field of energy storage devices, and discloses an energy storage device, an energy storage system and a charging network, wherein the energy storage device comprises an energy storage box; the battery device is arranged in the energy storage box and comprises a battery unit, a heat conduction structure and a heat exchange structure, wherein the battery unit comprises at least one battery unit, a medium accommodating cavity is formed in the heat conduction structure and is configured to accommodate phase change media, the heat conduction structure is in heat exchange fit with the battery unit and the heat exchange structure, the heat dissipation structure is arranged outside the energy storage box, and the heat dissipation structure is communicated with the heat exchange structure to form a circulation flow path of the heat exchange media. Therefore, compared with the prior art, the heat conduction structure, the heat exchange structure and the heat dissipation structure are matched, so that heat dissipation energy consumption is reduced, the failure rate of the energy storage device is reduced, the maintenance cost of the energy storage device is reduced, the manufacturing cost of the energy storage device is reduced, and the economic benefit of the energy storage device is improved.

Inventors

• OuYang Linyuan
• ZHANG WENQI
• He shuangjiang
• LI ZHONGHONG

Assignees

• 宁德时代新能源科技股份有限公司

Dates

Publication Date

20260512

Application Date

20260212

Claims (18)

1. 1. An energy storage device, comprising: An energy storage tank; the battery device is arranged in the energy storage box and comprises a battery unit, a heat conduction structure and a heat exchange structure, wherein the battery unit comprises at least one battery unit, a medium accommodating cavity is formed in the heat conduction structure and is configured to accommodate a phase change medium, and the heat conduction structure is in heat exchange fit with the battery unit and the heat exchange structure; the heat dissipation structure is arranged outside the energy storage box and is communicated with the heat exchange structure to form a circulating flow path of heat exchange medium.
2. 2. The energy storage device of claim 1, wherein the heat conducting structure comprises a first heat conducting portion and a second heat conducting portion which are connected in a bending manner, the first heat conducting portion is in heat exchange fit with the corresponding battery cell, the second heat conducting portion is in heat exchange fit with the corresponding heat exchanging structure, the second heat conducting portion is located above the first heat conducting portion in the vertical direction, the medium accommodating cavity comprises a first accommodating cavity and a second accommodating cavity which are communicated, the first accommodating cavity is formed in the first heat conducting portion, and the second accommodating cavity is formed in the second heat conducting portion.
3. 3. The energy storage device of claim 2, wherein the second heat conducting portions and the heat exchanging structures are plural, and the plural second heat conducting portions are respectively heat-exchanging matched with the plural heat exchanging structures.
4. 4. The energy storage device of claim 2, wherein the second heat conducting portions are two, the two second heat conducting portions are opposite and spaced apart along a first direction of the battery device, the first heat conducting portion is connected between the two second heat conducting portions, the battery cell is located above the first heat conducting portion along the vertical direction, and the battery cell is located between the two second heat conducting portions, the first direction is perpendicular to the vertical direction.
5. 5. The energy storage device of claim 4, wherein the number of heat exchanging structures is two, and the heat exchanging structure is disposed on a side of each of the second heat conducting portions facing away from the battery unit along the first direction.
6. 6. The energy storage device of claim 2, wherein the battery device further comprises a bottom plate positioned below the battery cells and in heat exchanging engagement with the battery cells in the vertical direction, and wherein the first thermally conductive portion is positioned between the bottom plate and the battery cells and in heat exchanging engagement with the bottom plate.
7. 7. The energy storage device of claim 6, wherein a fitting groove is formed on a side of the bottom plate facing the battery unit, and at least a portion of the first heat conduction portion is fitted in the fitting groove.
8. 8. The energy storage device of claim 2, wherein the second thermally conductive portion is formed with a medium injection port that communicates with the medium receiving cavity.
9. 9. The energy storage device of claim 2, further comprising a heat sink fin disposed on the heat sink structure.
10. 10. The energy storage device of claim 9, wherein at least one of an outer surface of the heat dissipating structure and an outer surface of the heat dissipating fin is provided with a heat dissipating layer.
11. 11. The energy storage device of any of claims 2-10, wherein the battery cells and the first thermally conductive portions are arranged along the vertical direction, the first thermally conductive portions comprise a thermally conductive body, the thermally conductive body and the respective battery cells correspond along the vertical direction, the thermally conductive body comprises a first thermally conductive section and a second thermally conductive section arranged along a first direction of the battery device and connected, an end surface of the battery cell facing the respective thermally conductive body is formed with a middle heat transfer area and an edge heat transfer area arranged along the first direction, at least a portion of the first thermally conductive section corresponds to the middle heat transfer area, at least a portion of the second thermally conductive section corresponds to the edge heat transfer area, and a width dimension of the first thermally conductive section is greater than a width dimension of the second thermally conductive section along a second direction of the battery device, the first direction, the second direction, and the vertical direction being mutually perpendicular.
12. 12. The energy storage device of claim 11, wherein the first heat conducting portion comprises a plurality of heat conducting bodies, the plurality of heat conducting bodies are sequentially arranged along the first direction, and the plurality of heat conducting bodies are respectively in heat exchange fit with the corresponding battery cells.
13. 13. The energy storage device of claim 11, wherein the plurality of heat conductive structures are sequentially arranged along the second direction, the battery unit comprises a plurality of rows of battery cells, the plurality of rows of battery cells are sequentially arranged along the second direction, and the plurality of rows of battery cells and the plurality of heat conductive structures are in one-to-one correspondence.
14. 14. The energy storage device of any of claims 1-10, further comprising a drive pump disposed in the heat dissipating structure and the heat exchanging structure communication path, the drive pump configured to drive a heat exchanging medium to circulate in the circulation flow path.
15. 15. The energy storage device of claim 14, wherein the drive pump is configured to drive the heat exchange medium to circulate within the circulation flow path if an average temperature of the battery cells of the energy storage device is greater than an ambient temperature.
16. 16. The energy storage device of any of claims 1-10, wherein the battery cell is a sodium ion battery cell.
17. 17. An energy storage system comprising an energy conversion system and an energy storage device according to any one of claims 1 to 16, the energy conversion system being connected to the energy storage device to convert energy from current input to or output from the energy storage device.
18. 18. A charging network, comprising: Charging piles; An energy storage device as claimed in any one of claims 1 to 16 or an energy storage system as claimed in claim 17, for providing electrical energy to the charging pile.

Description

Energy storage device, energy storage system and charging network Technical Field The present application relates to the field of energy storage devices, and in particular, to an energy storage device, an energy storage system, and a charging network. Background In the related art, the energy storage device is provided with a thermal management mechanism, and the thermal management mechanism takes away heat of the battery monomer in the energy storage device, so that the temperature of the battery monomer is kept at a proper temperature. However, the existing thermal management mechanism comprises a water cooling unit, the failure rate of the energy storage device is improved by relying on components such as a fan, a condenser and a compressor, and a large amount of electric quantity is consumed during the operation of the thermal management mechanism, so that the heat dissipation energy consumption of the energy storage device is high, the economic benefit of the energy storage device is influenced, meanwhile, the components such as the fan and the compressor are required to be replaced and maintained regularly, the maintenance cost of the energy storage device is high, and in addition, the cost of the water cooling unit is high, and the manufacturing cost of the energy storage device is high. Disclosure of utility model The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present application is to provide an energy storage device, which is beneficial to reducing heat dissipation energy consumption, reducing failure rate of the energy storage device, reducing maintenance cost of the energy storage device, and reducing manufacturing cost of the energy storage device, so as to improve economic benefit of the energy storage device. The application further provides an energy storage system. The application further provides a charging network. In a first aspect, an embodiment of the present application provides an energy storage device, including: An energy storage tank; The battery device is arranged in the energy storage box and comprises a battery unit, a heat conduction structure and a heat exchange structure, wherein the battery unit comprises at least one battery unit, a medium accommodating cavity is formed in the heat conduction structure and is configured to accommodate a phase change medium, and the heat conduction structure is in heat exchange fit with the battery unit and the heat exchange structure; The heat radiation structure is arranged outside the energy storage box and is communicated with the heat exchange structure to form a circulating flow path of the heat exchange medium. In the technical proposal, the heat conduction structure can transfer the heat of the battery monomer to the heat exchange structure through the cooperation of the heat conduction structure, the heat exchange structure and the heat dissipation structure, and the heat on the heat exchange structure is transferred to the heat dissipation structure through the circulation flow of the heat exchange medium in the circulation flow path, the energy storage device of the application does not need to be provided with parts such as a water cooling unit and the like, does not need to rely on the parts such as a fan, a condenser, a compressor and the like to dissipate heat, and compared with the prior art, the application does not need to be provided with the water cooling unit, the heat dissipation structure for radiating the battery monomer is simple, the number of parts formed by the heat dissipation structure for radiating the battery monomer is small, the fault rate of the energy storage device is reduced, the manufacturing cost of the energy storage device is reduced, the power consumption required by heat dissipation is reduced, the heat dissipation energy consumption is reduced, meanwhile, the parts of the energy storage device which are required to be replaced and maintained regularly are reduced, the operation and maintenance cost of the energy storage device in the whole life cycle is reduced, and the economic benefit of the energy storage device is improved. In some embodiments, the heat conducting structure comprises a first heat conducting part and a second heat conducting part which are connected in a bending way, the first heat conducting part is in heat exchange fit with the corresponding battery unit, the second heat conducting part is in heat exchange fit with the corresponding heat exchanging structure, the second heat conducting part is located above the first heat conducting part along the vertical direction, the medium accommodating cavity comprises a first accommodating cavity and a second accommodating cavity which are communicated, the first accommodating cavity is formed in the first heat conducting part, and the second accommodating cavity is formed in the second heat conducting part. In the above technical scheme, through sett