CN-122025905-A - Energy storage device

Abstract

The application provides an energy storage device, and belongs to the technical field of energy storage. The energy storage device comprises a cabinet body, a battery device, a heat exchange unit, a heat management assembly and a reversing assembly. The heat exchanger unit has a first outlet and a first inlet. The heat management component comprises a plurality of heat management components, a runner for flowing heat exchange medium is formed in the heat management components, the runner is provided with a first communication port and a second communication port, and each heat management component and the heat exchange unit form a heat exchange loop. The reversing assembly is arranged on the heat exchange loop and is provided with a first state and a second state, and is configured to be communicated with the first outlet and the first communication port and communicated with the first inlet and the second communication port in the first state, and to be communicated with the first outlet and the second communication port and communicated with the first inlet and the first communication port in the second state, so that the reversing of the heat exchange medium in the flow channel of the heat management component is realized, and the phenomenon of unbalanced heat exchange of the heat management component is facilitated to be alleviated.

Inventors

• LIU HONGBIAO
• LI QING
• WU KAI
• YU DONGXU
• LI ZHONGHONG
• ZHANG KAIWEN
• XING YANQING
• He shuangjiang

Assignees

• 宁德时代新能源科技股份有限公司

Dates

Publication Date

20260512

Application Date

20241111

Claims (20)

1. 1. An energy storage device, comprising: A cabinet body; The battery device is accommodated in the cabinet body and comprises a plurality of battery monomers; A heat exchange unit for providing a heat exchange medium, the heat exchange unit having a first outlet for outflow of the heat exchange medium and a first inlet for inflow of the heat exchange medium; a heat management assembly including a plurality of heat management members configured to manage a temperature of the battery device, the heat management members having flow passages formed therein for the heat exchange medium to flow, the flow passages having first and second communication ports, each of the heat management members forming a heat exchange circuit with the heat exchange unit, and The reversing assembly is arranged on the heat exchange loop and is provided with a first state and a second state, and is configured to be communicated with the first outlet and the first communication port and communicated with the first inlet and the second communication port in the first state, and to be communicated with the first outlet and the second communication port and communicated with the first inlet and the first communication port in the second state.
2. 2. The energy storage device of claim 1, wherein the reversing assembly comprises: A first valve module having a second inlet, a second outlet, and a third outlet, the second inlet in communication with the first outlet, the second outlet and the third outlet configured to alternatively communicate with the second inlet; a second valve module having a fourth outlet, a third inlet, and a fourth inlet, the fourth outlet in communication with the first inlet, the third inlet and the fourth inlet configured to alternatively communicate with the fourth outlet; wherein, second export with the third entry all with first communication port intercommunication, third export with the fourth entry all with the second communication port intercommunication.
3. 3. The energy storage device of claim 2, wherein the first valve module is a three-way valve.
4. 4. The energy storage device of claim 2, wherein the first valve module comprises a first valve and a second valve, the first valve and the second valve each being two-way valves; The first valve is provided with two first interfaces, the second valve is provided with two second interfaces, one first interface of the first valve is communicated with one second interface of the second valve to form the second inlet, the other first interface of the first valve is the second outlet, and the other second interface of the second valve is the third outlet.
5. 5. The energy storage device of claim 2, wherein the second valve module is a three-way valve.
6. 6. The energy storage device of claim 2, wherein the second valve module comprises a third valve and a fourth valve, each of the third valve and the fourth valve being a two-way valve; The third valve is provided with two third interfaces, the fourth valve is provided with two fourth interfaces, one third interface of the third valve is communicated with one fourth interface of the fourth valve to form the fourth outlet, the other third interface of the third valve is the third inlet, and the other fourth interface of the fourth valve is the fourth inlet.
7. 7. The energy storage device of claim 2, wherein the first valve module and the second valve module are each three-way ball valves.
8. 8. The energy storage device of any of claims 1-7, wherein the thermal management assembly further comprises a first duct and a second duct, the first communication ports of the plurality of thermal management components each communicating with the first duct, the second communication ports of the plurality of thermal management components each communicating with the second duct; Wherein the reversing assembly is configured to communicate the first outlet with the first delivery tube and to communicate the first inlet with the second delivery tube in the first state and to communicate the first outlet with the second delivery tube and to communicate the first inlet with the first delivery tube in the second state.
9. 9. The energy storage device of claim 8, wherein the energy storage device comprises a plurality of battery packs comprising a plurality of the battery devices arranged along a first direction, the plurality of battery packs arranged along a second direction, the second direction being perpendicular to the first direction; The energy storage device comprises a plurality of thermal management components, and the thermal management components are in one-to-one correspondence with the battery packs.
10. 10. The energy storage device of claim 9, comprising a plurality of said reversing assemblies, each said thermal management assembly being connected to said heat exchange unit by one said reversing assembly.
11. 11. The energy storage device of claim 10, further comprising a plurality of first detection modules and a plurality of first control modules, the first detection modules, the first control modules, the reversing assemblies, and the thermal management assemblies being in one-to-one correspondence, each first control module electrically connecting a corresponding first detection module and a corresponding reversing assembly; Wherein the first detection module is configured to detect a first temperature of the heat exchange medium within the first delivery tube and a second temperature of the heat exchange medium within the second delivery tube of the corresponding thermal management assembly, the first control module being configured to control the corresponding reversing assembly to switch between the first state and the second state when a difference between the first temperature and the second temperature is greater than a first preset value.
12. 12. The energy storage device of claim 9, further comprising a first conduit and a second conduit, wherein the first conduits of the plurality of thermal management assemblies are each in communication with the first conduit, and wherein the second conduits of the plurality of thermal management assemblies are each in communication with the second conduit; The first pipeline and the second pipeline are connected with the heat exchange unit through one reversing assembly, and the reversing assembly is configured to be communicated with the first outlet and the first pipeline and communicated with the first inlet and the second pipeline in the first state, and to be communicated with the first outlet and the second pipeline and communicated with the first inlet and the first pipeline in the second state.
13. 13. The energy storage device of claim 12, further comprising a second detection module and a second control module, the second control module electrically connecting the second detection module and the reversing assembly; the second detection module is used for detecting a third temperature of the heat exchange medium in the first pipeline and a fourth temperature of the heat exchange medium in the second pipeline, and the second control module is configured to control the reversing assembly to switch between the first state and the second state when a difference value between the third temperature and the fourth temperature is larger than a second preset value.
14. 14. The energy storage device of any one of claims 1-7, wherein the energy storage device comprises a plurality of the reversing assemblies in a one-to-one correspondence with the thermal management components, each of the thermal management components being connected to the heat exchange unit by one of the reversing assemblies.
15. 15. The energy storage device of claim 14, further comprising a plurality of third detection modules and a plurality of third control modules, the third detection modules, the third control modules, the reversing assemblies, and the thermal management components being in one-to-one correspondence, each third control module electrically connecting a corresponding third detection module and a corresponding reversing assembly; Wherein the third detection module is configured to detect a fifth temperature of the heat exchange medium at the first communication port and a sixth temperature of the heat exchange medium at the first communication port of the corresponding thermal management component, the third control module being configured to control the corresponding reversing assembly to switch between the first state and the second state when a difference between the fifth temperature and the sixth temperature is greater than a third preset value.
16. 16. The energy storage device of claim 1, further comprising a case, wherein a plurality of the battery cells are accommodated in the case, and wherein the plurality of the battery cells are arranged in a second direction and a third direction; The battery device is provided with the thermal management component on at least one side in a first direction, and the first direction, the second direction and the third direction are perpendicular to each other.
17. 17. The energy storage device of claim 16, comprising a battery pack comprising a plurality of the battery devices arranged along the first direction, each of the battery devices being provided with the thermal management component on at least one side of the first direction.
18. 18. The energy storage device of claim 17, wherein the thermal management components are in one-to-one correspondence with the battery devices, and the thermal management components are disposed at the bottom of the battery devices.
19. 19. The energy storage device of claim 18, wherein, in the first direction, a projection of the battery device is located within the corresponding thermal management component.
20. 20. The energy storage device of claim 16, wherein an area of an area defined by an outer contour of orthographic projections of the plurality of battery cells in a projection plane perpendicular to the first direction is greater than or equal to 0.48m 2 .

Description

Energy storage device Technical Field The application relates to the technical field of energy storage, in particular to an energy storage device. Background In recent years, with the rapid development of technology, large base stations, such as 5G base stations, have been greatly popularized. Among the basic operating devices of a base station, energy storage devices are of great importance for storing and supplying energy. The energy storage device comprises a plurality of battery devices to promote the voltage and the capacity of the energy storage device, and because the battery devices can generate a large amount of heat in the continuous charging and discharging use process, the internal temperature of the energy storage device can be increased rapidly, and the service performance and the service life of the energy storage device are seriously affected. Disclosure of Invention The embodiment of the application provides an energy storage device, which can effectively improve the service performance and service life of the energy storage device. In a first aspect, an embodiment of the application provides an energy storage device, comprising a cabinet, a battery device, a heat exchange unit, a heat management assembly and a reversing assembly, wherein the battery device is accommodated in the cabinet, the battery device comprises a plurality of battery cells, the heat exchange unit is used for providing a heat exchange medium, the heat exchange unit is provided with a first outlet for flowing out of the heat exchange medium and a first inlet for flowing in the heat exchange medium, the heat management assembly comprises a plurality of heat management components, the heat management components are configured to manage the temperature of the battery device, a flow channel for flowing the heat exchange medium is formed in the heat management components, the flow channel is provided with a first communication port and a second communication port, each heat management component forms a heat exchange circuit with the heat exchange unit, the reversing assembly is arranged on the heat exchange circuit, and is provided with a first state and a second state, and the reversing assembly is configured to be communicated with the first outlet and the first communication port and the first inlet and the first communication port and the second communication port when in the first state. In the technical proposal, the heat management component is provided with a plurality of heat management components, each heat management component forms a heat exchange loop with the heat exchange unit, the heat exchange loop is provided with a reversing component, the reversing component can realize the communication between the first outlet and the first communication port and between the first inlet and the second communication port when in the first state, and realize the communication between the first outlet and the second communication port and between the first inlet and the first communication port when in the second state, so as to realize the reversing of the heat exchange medium in the flow channels of the heat management components, the energy storage device adopting the structure can realize the structure that the plurality of heat management components are mutually connected in parallel on one hand, is beneficial to reducing the mutual influence of the heat exchange medium in the flow channels of the plurality of heat management components, can realize the smaller temperature difference of the heat exchange medium in the flow channels of the plurality of the heat management components, so as to effectively improve the heat exchange balance among the heat management components, on the other hand, the flow direction of the heat exchange medium in the flow channel of the heat management component is switched in the use process of the energy storage device, the temperature of the heat management component continuously positioned at the first communication port is lower than the temperature of the heat exchange medium at the second communication port or the temperature of the heat exchange medium at the second communication port is lower than the temperature of the heat exchange medium at the first communication port can be effectively relieved, the phenomenon that the temperature difference of different areas of the heat management component is overlarge in the use process can be improved, the phenomenon that the heat exchange imbalance occurs in the heat management component can be relieved, the effect of the heat management component on the battery device can be improved, the temperature consistency among a plurality of battery monomers in the battery device or the temperature consistency among the battery monomers can be improved, the service life and the service performance of the energy storage device are improved. In some embodiments, the reversing assembly includes a first valve module having a second inlet in communi