CN-122025965-A - Cascade type energy storage battery compartment

Abstract

The invention belongs to the technical field of energy storage, and particularly relates to a cascading energy storage battery compartment, which comprises a container type compartment body and a plurality of cascading energy storage modules arranged in the container type compartment body side by side; the cascade energy storage module comprises a frame body, two battery clusters and two energy storage converters, wherein the two battery clusters are arranged on the frame body, the two battery clusters are distributed up and down, the interface ends face opposite, the two energy storage converters are oppositely arranged between the two battery clusters, the interface ends face outwards and are respectively and electrically connected with the two battery clusters, the two energy storage converters are connected in series, and the cascade energy storage modules are connected in series sequentially through the energy storage converters, so that the voltage is increased step by step. The cascade energy storage modules are uniformly arranged, the upper battery clusters and the lower battery clusters are aligned, the upper battery clusters and the lower battery clusters face opposite directions, and the energy storage converter faces the corresponding battery clusters in the same direction, so that the height of the whole cabin can be reduced, the energy density is improved, the risk of ultrahigh transportation is reduced, the potential difference between the adjacent battery clusters is small, and the running safety of equipment is ensured.

Inventors

• WEN YULIANG
• LUO WENGUANG
• SHI MENGZHAO
• XU DONGYANG
• TANG WENBING
• WANG YUXIANG
• LUO QINGQUN
• SU MINGMING
• YE MING

Assignees

• 中车株洲电力机车研究所有限公司

Dates

Publication Date

20260512

Application Date

20241112

Claims (10)

1. 1. A cascade energy storage battery compartment, comprising: A container-type cabin (100); The cascade energy storage modules (200) are arranged in the container-type cabin body (100) side by side, each cascade energy storage module (200) comprises a frame body (210), two battery clusters (220) and two energy storage converters (230), wherein the two battery clusters (220) are arranged on the frame body (210) in a sequential series mode, the interface ends of the two battery clusters (220) are distributed up and down, the directions of the interface ends of the two energy storage converters (230) are opposite, the two energy storage converters (230) are oppositely arranged between the two battery clusters (220) and the interface ends of the two energy storage converters are outwards connected with the two battery clusters (220) respectively in an electric mode, the two energy storage converters (230) are connected in series mode, and the cascade energy storage modules (200) enable voltage to rise step by step.
2. 2. The cascade energy storage battery compartment according to claim 1, characterized in that the battery cluster (220) comprises at least three battery packs (221) connected in series and/or at least three battery packs (221) connected in parallel.
3. 3. The cascade energy storage battery compartment of claim 2, wherein the number of cells connected in series within the battery pack (221) is not less than ninety.
4. 4. The cascade energy storage battery compartment according to claim 2, wherein the battery cluster (220) is electrically connected with an energy storage high-voltage tank (240), the energy storage high-voltage tank (240) and the energy storage converter (230) are distributed side by side, the battery pack (221) is connected to the energy storage high-voltage tank (240), the energy storage high-voltage tank (240) is connected to a direct current input end of the shooter energy storage converter (230), and the energy storage converter (230) outputs in alternating current.
5. 5. The cascade energy storage battery compartment according to claim 1, wherein the potential difference between the upper and lower battery clusters (220) of the cascade energy storage module (200) is 800V-1200V.
6. 6. The cascade energy storage battery compartment according to claim 1, wherein a cascade copper bar (300) is arranged in the container-type compartment body (100), the cascade copper bar (300) is arranged on the frame body (210) in an S-shaped manner and passes through the lower part of each energy storage converter (230), and the energy storage converters (230) are connected in series through the cascade copper bar (300).
7. 7. The cascade energy storage battery compartment according to claim 1, characterized in that a plurality of insulating supports (400) are arranged in the container type compartment body (100), the cascade energy storage module (200) is arranged at the top of the insulating supports (400), and the insulating supports (400) are fixedly connected with the frame body (210).
8. 8. The cascade energy storage battery compartment of any of claims 1-7, further comprising a liquid cooling module comprising an upper cooling line, a lower cooling line and a plurality of cooling plates, the upper cooling line being arranged above the cascade energy storage module (200), the lower cooling line being arranged below the cascade energy storage module (200), the plurality of cooling plates being divided into two groups communicating with the upper cooling line and the lower cooling line, respectively, the cooling plates being in contact with the battery cluster (220), the upper cooling line and the lower cooling line both communicating with an external liquid cooling unit for cooling the upper layer of the battery cluster (220) and the lower layer of the battery cluster (220), respectively.
9. 9. The cascade energy storage battery compartment of any of claims 1-7, further comprising a dehumidifier and a desiccant air conditioner (500), the dehumidifier and the desiccant air conditioner (500) being diagonally distributed in the container-like compartment (100).
10. 10. The cascade energy storage battery compartment of any of claims 1-7, wherein a fan (800) and a ventilation window are provided on the container-type compartment body (100), the fan (800) and the ventilation window being diagonally distributed.

Description

Cascade type energy storage battery compartment Technical Field The invention belongs to the technical field of energy storage, and particularly relates to a cascade energy storage battery compartment. Background With the development of wind power and photovoltaics, the demand of a power system for power auxiliary services such as peak regulation, frequency modulation, smooth output and the like is obviously increased, and the energy storage technology is rapidly developed. Electrochemical energy storage is the mainstream energy storage mode at present because of its characteristics such as quick response, construction cycle are short, can nimble application, conversion efficiency are high. The current electrochemical energy storage cabin can be divided into a low-voltage boosting type and a medium-high voltage cascading type, and the current market mainstream is the low-voltage boosting type. When the scale of the energy storage power station reaches more than hundred megawatts, the problems of parallel capacity loss, parallel circulation and the like of the direct current side of the low-voltage boost energy storage cabin occur, and the safety and the efficiency of the energy storage power station are affected. The medium-high voltage cascade energy storage cabin is used as an emerging technical path, and the battery pack is subjected to inversion and series connection to achieve the purpose of boosting, so that the problems can be solved, and the system is fast in response, high in efficiency, suitable for a large-capacity energy storage application scene and wide in market prospect. However, the prior middle-high voltage cascade energy storage cabin has unreasonable layout of a plurality of battery clusters and energy storage converters in the cabin, so that the space utilization rate in the cabin is low, and the cabin is inconvenient to maintain and set protective equipment. Disclosure of Invention The invention aims to solve the technical problem of providing a cascade energy storage battery compartment which has higher integration density, improves the space utilization rate and is convenient to maintain. The invention provides a cascade energy storage battery compartment, comprising: a container type cabin body; The cascade energy storage modules comprise a frame body, two battery clusters and two energy storage converters, wherein the two battery clusters and the two energy storage converters are arranged on the frame body, the two battery clusters are distributed up and down, the interface ends face opposite, the two energy storage converters are oppositely arranged between the two battery clusters, the interface ends face outwards and are respectively electrically connected with the two battery clusters, the two energy storage converters are connected in series, and the cascade energy storage modules are sequentially connected in series through the energy storage converters, so that the voltage is increased step by step. Optionally, the battery cluster comprises at least three battery packs connected in series and/or at least three battery packs connected in parallel. Optionally, the number of cells connected in series in the battery pack is not less than ninety. Optionally, the battery cluster is electrically connected with an energy storage high-voltage box, the energy storage high-voltage box and the energy storage converter are distributed side by side, the battery pack is connected into the energy storage high-voltage box, the energy storage high-voltage box is connected into the direct current input end of the shooter energy storage converter, and the energy storage converter outputs in an alternating current mode. Optionally, the potential difference between the upper and lower battery clusters in the cascade energy storage module is 800V-1200V. Optionally, a cascading copper bar is arranged in the container type cabin body, the cascading copper bar is arranged on the frame body in an S-shaped mode and penetrates through the lower portion of each energy storage converter, and the energy storage converters are connected in series through the cascading copper bar. Optionally, a plurality of insulating supports are arranged in the container type cabin, the cascade energy storage module is arranged at the top of the insulating supports, and the insulating supports are fixedly connected with the frame body. Optionally, the cascade energy storage battery compartment further comprises a liquid cooling module, the liquid cooling module comprises an upper cooling pipeline, a lower cooling pipeline and a plurality of cooling plates, the upper cooling pipeline is arranged above the cascade energy storage module, the lower cooling pipeline is arranged below the cascade energy storage module, the plurality of cooling plates are divided into two groups and are respectively communicated with the upper cooling pipeline and the lower cooling pipeline, the cooling plates are in contact with the battery clus