CN-224217553-U - Energy storage box and flow equalizing and liquid separating structure for energy storage device

CN224217553UCN 224217553 UCN224217553 UCN 224217553UCN-224217553-U

Abstract

The application relates to an energy storage box and a flow equalizing and liquid distributing structure for refrigerant liquid inlet of the energy storage box, wherein the flow equalizing and liquid distributing structure is used for introducing and distributing refrigerant from the outside of the energy storage box to the periphery of the energy storage box through the matching of a main liquid inlet channel and a plurality of secondary liquid inlet channels and then matching with a plurality of liquid distributing outlets on a branch channel, so that the refrigerant can uniformly flow into each heat radiating channel.

Inventors

Hou Xinchen
CAI QINGFENG
Zhong Luyi
LU GUI
LI SHIJIE

Assignees

北京超弦传热科技有限公司

Dates

Publication Date: 20260508
Application Date: 20250626

Claims (10)

1. The flow equalizing and liquid separating structure for cold coal liquid inlet of energy storing box is used for leading refrigerant into heat dissipating flow channels between adjacent electric cores in battery grouping and balancing flow resistance, and is characterized in that the flow equalizing and liquid separating structure comprises a liquid equalizing flow channel positioned at the top or bottom of the energy storing box and a branch flow channel positioned at the side of the battery grouping, The liquid homogenizing channel comprises a main liquid inlet channel and a secondary liquid inlet channel, wherein one end of the main liquid inlet channel extends to the outside of the energy storage box, and the other end of the main liquid inlet channel extends to the top or bottom of the energy storage box; Each battery grouping side is provided with at least two branch flow passages, each branch flow passage is communicated with one secondary liquid inlet flow passage, a plurality of liquid separating outlets are arranged on each branch flow passage, and each liquid separating outlet is respectively communicated with one heat dissipation flow passage.
2. The flow equalizing and liquid separating structure according to claim 1, wherein the secondary liquid inlet channel adopts a m-shaped layout structure, the secondary liquid inlet channel comprises a first liquid inlet channel arranged along the diagonal direction of the energy storage box, a second liquid inlet channel arranged along the width direction of the energy storage box and a third liquid inlet channel arranged along the length direction of the energy storage box, one ends of the first liquid inlet channel, the second liquid inlet channel and the third liquid inlet channel are respectively communicated with the main liquid inlet channel, the other ends of the first liquid inlet channel are arranged at four corners of the energy storage box, the other ends of the second liquid inlet channel are arranged at the center positions of the sides of the width direction of the energy storage box, the other ends of the third liquid inlet channel are arranged at the center positions of the sides of the length direction of the energy storage box, and the other ends of the first liquid inlet channel, the second liquid inlet channel and the third liquid inlet channel are respectively communicated with one branch channel.
3. The flow equalizing and liquid separating structure as in claim 2, wherein the second-stage liquid inlet flow channel and the third liquid inlet flow channel are S-shaped flow channel structures formed by alternately connecting a plurality of curved sections and straight sections, and the number of the curved sections of the third liquid inlet flow channel is greater than that of the second-stage liquid inlet flow channel.
4. The flow equalizing and liquid separating structure as recited in claim 3, wherein the first liquid inlet channel, the second liquid inlet channel and the third liquid inlet channel are respectively provided with two or more first liquid outlets, and the aperture of the first liquid outlet is increased along the flowing direction of the refrigerant.
5. The flow equalizing and liquid separating structure according to claim 1, wherein the secondary liquid inlet channels adopt snowflake-shaped layout structures, each secondary liquid inlet channel comprises a fourth liquid inlet channel and a plurality of radial fifth liquid inlet channels, each fourth liquid inlet channel adopts a closed-loop polygonal structure, the other end of each main liquid inlet channel is located at the center of the closed-loop polygonal structure, the other end of each main liquid inlet channel is communicated with the vertex or the side edge of the closed-loop polygonal structure, each fifth liquid inlet channel is provided with at least one sixth liquid inlet channel, one end of each fifth liquid inlet channel is communicated with the vertex or the side edge of the closed-loop polygonal structure, the other end of each fifth liquid inlet channel or the tail end of each sixth liquid inlet channel extends to the periphery of the energy storage box, and the other end of each fifth liquid inlet channel or the tail end of each sixth liquid inlet channel is respectively communicated with one branch channel.
6. The flow equalizing and liquid separating structure as in claim 1, wherein the secondary liquid inlet flow passage adopts a plurality of regular geometric framework nested distribution structures, the secondary liquid inlet flow passage comprises a plurality of coaxial nested geometric flow passages, at least one communicating flow passage is arranged between adjacent geometric flow passages, the other end of the main liquid inlet flow passage is positioned at the center of the geometric flow passage of the innermost layer, the other end of the main liquid inlet flow passage is communicated with the top point or the side edge of the geometric flow passage of the innermost layer, a liquid outlet is arranged at the top point or the side edge of each geometric flow passage, and each liquid outlet is communicated with one branch flow passage.
7. The flow equalizing and liquid separating structure according to claim 1, wherein the secondary liquid inlet runner adopts a lung-shaped bionic runner structure, the secondary liquid inlet runner comprises a seventh liquid inlet runner and a plurality of eighth liquid inlet runners, wherein the seventh liquid inlet runner is of an arc-shaped structure, the other end of the main liquid inlet runner is communicated with the middle position of the seventh liquid inlet runner, one end of each eighth liquid inlet runner is communicated with the end part or a position close to the end part of the seventh liquid inlet runner, the other end of each eighth liquid inlet runner extends to the periphery of the energy storage tank, and the other end of each eighth liquid inlet runner is respectively communicated with one branch runner.
8. An energy storage box, wherein a plurality of battery groups are arranged in the energy storage box, and the energy storage box is internally provided with a flow equalizing and liquid separating structure as claimed in any one of claims 1-7, wherein the flow equalizing channels are arranged at the top or bottom positions of the energy storage box, and the branch flow channels are distributed at the side positions of the battery groups; The battery grouping is provided with a plurality of battery cores, heat dissipation flow channels are arranged between adjacent battery cores, liquid inlets of the heat dissipation flow channels are close to the side parts of the battery cores and are arranged at lower positions, liquid inlets of the heat dissipation flow channels are respectively communicated with liquid distribution outlets of the branch flow channels, and liquid outlets of the heat dissipation flow channels are close to the top parts of the battery cores.
9. The energy storage box according to claim 8, wherein the battery group is provided with a baffle at the top of the battery core, the baffle encloses to form a first effusion cavity covering the top surface of the battery group, and the liquid inlet of the heat dissipation runner is communicated with the first effusion cavity.
10. The energy storage box according to claim 8, wherein a cavity partition plate is arranged in the energy storage box and divides the interior of the energy storage box into a pipeline cavity and a liquid storage cavity, wherein the battery grouping and branch flow passages positioned at the sides of the battery grouping are uniformly distributed in the liquid storage cavity, and the liquid homogenizing flow passages are arranged in the pipeline cavity.

Description

Energy storage box and flow equalizing and liquid separating structure for energy storage device Technical Field The application relates to the technical field of battery energy storage and cooling, in particular to an energy storage box and a flow equalizing and liquid separating structure for an energy storage device. Background Along with the rapid development of new energy technology, the energy storage box is used as key equipment for electric power storage, and a large amount of heat can be generated by an internal battery in the charging and discharging process, so that the performance and the service life of the battery can be seriously affected if the heat cannot be effectively dissipated in time, and even potential safety hazards exist. At present, a common mode is to conduct heat dissipation by introducing a refrigerant into a heat dissipation flow channel between adjacent cells in a battery grouping. However, the existing refrigerant liquid inlet structure has the problem of unbalanced flow resistance, so that the refrigerant is difficult to uniformly distribute to each heat dissipation flow channel, the heat dissipation of part of the battery cells is insufficient, the refrigerant flow of part of the battery cells is excessive, and the energy waste is caused. Meanwhile, the traditional liquid inlet structure layout occupies a large space, influences the arrangement of batteries in the energy storage box and the compactness of the whole structure, limits the improvement of the energy storage density of the energy storage box, and cannot meet the increasing high-energy-density energy storage requirement. Therefore, there is a need for a refrigerant inlet flow equalizing and separating structure of an energy storage tank, which can equalize flow resistance, efficiently distribute refrigerant and optimize space layout. Disclosure of utility model In order to overcome the defects in the prior art, the application provides an energy storage box and a flow equalizing and liquid separating structure for an energy storage device, and the technical scheme is as follows: a flow equalizing and liquid dividing structure for cold coal liquid inlet of an energy storage box, which is used for guiding refrigerant into heat dissipation flow channels between adjacent electric cores in battery grouping and equalizing flow resistance, the flow equalizing and liquid dividing structure comprises a flow equalizing flow channel positioned at the top or bottom of the energy storage box and a branch flow channel positioned at the side of the battery grouping, The liquid homogenizing channel comprises a main liquid inlet channel and a secondary liquid inlet channel, wherein one end of the main liquid inlet channel extends to the outside of the energy storage box, and the other end of the main liquid inlet channel extends to the top or bottom of the energy storage box; Each battery grouping side is provided with at least two branch flow passages, each branch flow passage is communicated with one secondary liquid inlet flow passage, a plurality of liquid separating outlets are arranged on each branch flow passage, and each liquid separating outlet is respectively communicated with one heat dissipation flow passage. The secondary liquid inlet channel is of a rice-shaped layout structure, comprises a first liquid inlet channel arranged in the diagonal direction of the energy storage box, a second liquid inlet channel arranged in the width direction of the energy storage box and a third liquid inlet channel arranged in the length direction of the energy storage box, wherein one ends of the first liquid inlet channel, the second liquid inlet channel and the third liquid inlet channel are respectively communicated with the main liquid inlet channel, the other end of the first liquid inlet channel is arranged at the four corners of the energy storage box, the other end of the second liquid inlet channel is arranged at the center of the side edge of the width direction of the energy storage box, the other end of the third liquid inlet channel is arranged at the center of the side edge of the length direction of the energy storage box, and the other ends of the first liquid inlet channel, the second liquid inlet channel and the third liquid inlet channel are respectively communicated with one branch channel. Optionally, the second-stage liquid inlet flow channel and the third liquid inlet flow channel are of an S-shaped flow channel structure formed by alternately connecting a plurality of bending sections and straight line sections, and the number of the bending sections of the third liquid inlet flow channel is larger than that of the second-stage liquid inlet flow channel. Optionally, the first liquid inlet channel, the second liquid inlet channel and the third liquid inlet channel are respectively provided with two or more first liquid outlets, and the aperture of the first liquid outlets is increased along the flowing directio