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CN-121986400-A - Battery device, refrigerant heat exchange device and electricity utilization device

CN121986400ACN 121986400 ACN121986400 ACN 121986400ACN-121986400-A

Abstract

The application belongs to the technical field of battery production, and provides a battery device, a refrigerant heat exchange device and an electricity utilization device, wherein the battery device comprises a box body assembly, a battery monomer assembly and a refrigerant heat exchange component; the box body assembly is provided with a containing cavity, the battery unit assembly is contained in the containing cavity, the refrigerant heat exchange component comprises an inlet and outlet area, a main flow distribution and collection area and a heat exchange area, wherein the inlet and outlet area, the main flow distribution and collection area and the heat exchange area are respectively provided with a refrigerant flow passage, the refrigerant flow passages in the main flow distribution and collection area are communicated with the inlet and outlet area and the refrigerant flow passages in the main flow distribution and collection area, the inlet and outlet area is configured to guide in or guide out refrigerant to the refrigerant flow passages, the heat exchange area is overlapped with the projection of the battery unit assembly on the refrigerant heat exchange component, the refrigerant flow passages in the heat exchange area are configured to perform heat exchange with the battery unit assembly, and the main flow distribution and collection area and the inlet and outlet area are both configured to be misaligned with the projection of the battery unit assembly on the refrigerant heat exchange component. The application aims to improve the temperature equalizing capability of a refrigerant heat exchange component.

Inventors

  • Gao Bang
  • ZHANG RUITONG
  • HUANG XIAOTENG

Assignees

  • 宁德时代新能源科技股份有限公司

Dates

Publication Date
20260505
Application Date
20250427
Priority Date
20240428

Claims (20)

  1. A battery device (1100), characterized by comprising: a housing assembly (1120) having a receiving cavity (1124); a battery cell assembly (1110) housed within the housing cavity (1124); The refrigerant heat exchange component (1130) comprises an inlet and outlet area (1131) with a refrigerant flow channel (1134) inside, a main flow distribution and collection area (1132) and a heat exchange area (1133), wherein the main flow distribution and collection area (1132) is located between the inlet and outlet area (1131) and the heat exchange area (1133), the refrigerant flow channel (1134) in the main flow distribution and collection area (1132) is communicated with the inlet and outlet area (1131) and the refrigerant flow channel (1134) in the main flow distribution and collection area (1132), the inlet and outlet area (1131) is configured to guide refrigerant into or guide out of the refrigerant flow channel (1134), the heat exchange area (1133) coincides with the projection of the battery unit assembly (1110) on the refrigerant heat exchange component (1130), the refrigerant flow channel (1134) in the heat exchange area (1133) is configured to be in heat exchange with the battery unit assembly (1110), and the inlet and outlet area (1132) and the main flow distribution and collection area (1131) are configured to be not coincident with the projection of the battery unit assembly (1110) on the heat exchange component (1130).
  2. The battery device (1100) according to claim 1, wherein the heat exchange region (1133) comprises a direct current region (11331) and a reversing region (11332), the refrigerant flow channels (1134) in the direct current region (11331) are configured as a plurality of direct current channel structures (11333) which are arranged at intervals in a second direction (Y), each direct current channel structure (11333) extends along a first direction (X), the refrigerant flow channels (1134) in the reversing region (11332) are configured as a bent flow channel structure (11334), the bent flow channel structure (11334) is communicated with the direct current channel structures (11333), the second direction (Y) is perpendicular to the first direction (X), and the battery cell assembly (1110) is arranged opposite to the direct current region (11331) or the battery cell assembly (1110) is arranged opposite to both the direct current region (11331) and the reversing region (11332).
  3. The battery device (1100) according to claim 2, wherein the battery cell assembly (1110) comprises a plurality of battery cell groups (1111) arranged in the second direction (Y), each of the battery cell groups (1111) comprising a plurality of battery cells (1112) stacked in the first direction (X).
  4. The battery device (1100) according to claim 2, wherein the direct current channel structure (11333) has a first length (L1) in the first direction (X), the folded channel structure (11334) has a second length (L2) in the first direction (X), and a ratio of the second length (L2) to the first length (L1) is less than 0.1.
  5. The battery device (1100) according to claim 2, wherein the commutation zone (11332) is located at an edge of the heat exchange zone (1133) and/or the commutation zone (11332) is located between the direct current zone (11331) and the main current distribution and collection zone (1132).
  6. The battery device (1100) of claim 2, wherein the commutation area (11332) further comprises a sub-shunt and bus structure (11335), the sub-shunt and bus structure (11335) being connected between a portion of the meandering channel structure (11334) and a portion of the direct channel structure (11333).
  7. The battery device (1100) according to any one of claims 1-6, wherein the heat exchange region (1133) has a third length (L3) in the first direction (X), the refrigerant heat exchange member (1130) has a fourth length (L4) in the first direction (X), and a ratio of the third length (L3) to the fourth length (L4) ranges from 0.6 or more to less than 1.
  8. The battery device (1100) of any of claims 1-6, wherein the heat exchange zone (1133) has a heat exchange surface (11339) opposite the battery cell assembly (1112), the coolant flow channel (1134) within the heat exchange zone (1133) is configured opposite the heat exchange surface (11339), and a ratio of an area of a projected area of the coolant flow channel (1134) within the heat exchange zone (1133) on the heat exchange surface (11339) to an area of the heat exchange surface (11339) is greater than or equal to 0.4 and less than or equal to 0.8.
  9. The battery arrangement (1100) according to any one of claims 2-6, wherein a separation distance (L5) between two adjacent direct current channel structures (11333) in the second direction (Y) is in the range of 5mm-15mm.
  10. The battery arrangement (1100) according to any one of claims 1-6, wherein the width (L6) of the coolant flow channel is in the range of 6mm-15mm.
  11. The battery unit (1100) according to any one of claims 1-6, wherein the refrigerant heat exchange member (1130) further comprises a plurality of cavities (1138) therein, each of the cavities (1138) being disposed in non-communication with the refrigerant flow channel (1134).
  12. The battery device (1100) according to any one of claims 1-6, wherein the refrigerant heat exchange component (1130) further comprises a plurality of mounting holes (1139), and the mounting holes (1139) are distributed in the heat exchange area (1133) and avoid the refrigerant flow channel (1134).
  13. The battery device (1100) according to any one of claims 1-6, wherein the inlet and outlet region (1131), the primary current collecting region (1132) and the heat exchange region (1133) are sequentially arranged in a first direction (X), the refrigerant flow channel (1134) in the inlet and outlet region (1131) comprises a first flow channel (11311) and a second flow channel (11312), the flow direction of the refrigerant in the first flow channel (11311) is opposite to the flow direction of the refrigerant in the second flow channel (11312), the refrigerant flow channel (1134) in the primary current collecting region (1132) comprises a first flow channel (11321) and a second flow channel (11322), the refrigerant flow channel (1134) in the heat exchange region (1133) comprises an upstream flow channel (11337) and a downstream flow channel (11338) which are communicated, the first flow channel (11311), the first flow channel (11321) and the upstream flow channel (11337) are sequentially arranged, and the second flow channel (11338) is sequentially communicated.
  14. The battery device (1100) according to claim 13, wherein the refrigerant flow channels (1134) within the heat exchange region (1133) comprise a plurality of heat exchange sub-flow channels (11336) disposed in parallel, each of the heat exchange sub-flow channels (11336) comprising the upstream flow channel (11337) and the downstream flow channel (11338), a portion of the upstream flow channels (11337) of the heat exchange sub-flow channels (11336) being in adjacent and thermally conductive engagement with the downstream flow channels (11338) of the adjacent heat exchange sub-flow channels (11336), and a portion of the downstream flow channels (11338) of the heat exchange sub-flow channels (11336) being in adjacent and thermally conductive engagement with the upstream flow channels (11337) of the adjacent heat exchange sub-flow channels (11336).
  15. The battery device (1100) according to claim 14, wherein a plurality of the heat exchange sub-channels (11336) are arranged in sequence along a second direction (Y), and the upstream channel (11337) and the downstream channel (11338) in the heat exchange sub-channels (11336) are each arranged to extend along the first direction (X), and the second direction (Y) is perpendicular to the first direction (X).
  16. The battery device (1100) according to claim 13, wherein at least one of the first flow channels (11311) is provided, a plurality of the second flow channels (11312) are provided, and all of the first flow channels (11311) are distributed between two adjacent second flow channels (11312).
  17. The battery device (1100) according to claim 16, wherein the flow direction of the refrigerant in the first flow channel (11311) is an entering direction of the main flow dividing and collecting region (1132).
  18. The battery device (1100) according to any one of claims 1-6, wherein the case assembly (1120) comprises a case body (1121) having an opening, the refrigerant heat exchanging member (1130) is connected to the case body (1121) and covers the opening to form the accommodating chamber (1124), and the refrigerant heat exchanging member (1130) is disposed opposite to the battery cell assembly (1110).
  19. A refrigerant heat exchange device, characterized in that the refrigerant heat exchange device comprises the refrigerant heat exchange component (1130) in a battery device (1100) according to any one of claims 1-18.
  20. An electrical device comprising a battery device (1100) according to any one of claims 1-18, the battery device (1100) being adapted to store or provide electrical energy.

Description

Battery device, refrigerant heat exchange device and electricity utilization device The present application claims priority from the national intellectual property agency, application number 202420907842.4, chinese patent application entitled "heat exchange device, battery and electric device", filed 28 at 2024, the entire contents of which are incorporated herein by reference, and from international application PCT/CN2025/078572 entitled "battery device, refrigerant heat exchange device and electric device", filed 21 at 2025, 02, the entire contents of which are incorporated herein by reference. Technical Field The battery device in the new energy automobile can release more heat in the process of charging and discharging, and the heat exchange component capable of exchanging heat to the battery cell assembly can be arranged in the battery device generally, so that the battery cell assembly can be cooled down through heat exchange. In the related art, the flow channel inside the heat exchange component is disordered in layout, and the functional area with heat exchange capacity and the nonfunctional area with lower heat exchange capacity are mutually alternated, so that the temperature uniformity of the heat exchange component is influenced, the temperature distribution of the heat exchange component is uneven, the balanced heat exchange of the heat exchange component to the battery cell assembly is influenced, and the service performance and the service life of the battery device are further influenced. Disclosure of Invention The embodiment of the application aims to provide a battery device, a refrigerant heat exchange device and an electric device, and aims to solve the technical problem that the temperature uniformity of refrigerant heat exchange components in the battery device is poor. Technical solution The technical scheme adopted by the embodiment of the application is as follows: in a first aspect, the present application provides a battery device comprising: a housing assembly having a receiving cavity; The battery monomer component is accommodated in the accommodating cavity; The refrigerant heat exchange component comprises an inlet and outlet area, a main flow distribution and collection area and a heat exchange area, wherein the inlet and outlet area, the main flow distribution and collection area and the heat exchange area are respectively provided with a refrigerant flow passage, the main flow distribution and collection area is positioned between the inlet and outlet area and the heat exchange area, the refrigerant flow passages in the main flow distribution and collection area are communicated with the inlet and outlet area and the refrigerant flow passages in the main flow distribution and collection area, the inlet and outlet area is configured to guide in or guide out a refrigerant to the refrigerant flow passages, the heat exchange area is overlapped with the projection of the battery unit assembly on the refrigerant heat exchange component, the refrigerant flow passages in the heat exchange area are configured to perform heat exchange with the battery unit assembly, and the main flow distribution and collection area and the inlet and outlet area are both configured to be misaligned with the projection of the battery unit assembly on the refrigerant heat exchange component. In this embodiment, the heat exchange areas with higher heat exchange capacity are separated from the main current distribution and collection area and the inlet and outlet areas, and the refrigerant flow channels in the main current distribution and collection area and the inlet and outlet areas can not enter the areas of the refrigerant flow channels in the heat exchange areas, so that the refrigerant flow channels in the heat exchange areas are more concentrated in distribution, the distribution paths of the refrigerant flow channels can be simpler, the temperature distribution in the heat exchange areas is more uniform, the heat exchange areas are configured to be opposite to the battery unit assembly and exchange heat with the battery unit assembly, and the capacity of the refrigerant heat exchange components for uniformly exchanging heat to the battery unit assembly is improved. In one embodiment, the heat exchange area comprises a direct current area and a reversing area, wherein the refrigerant flow channels in the direct current area are configured into a plurality of direct current channel structures which are arranged at intervals in a second direction, each direct current channel structure extends along a first direction, the refrigerant flow channels in the reversing area are configured into a bent flow channel structure, the bent flow channel structure is communicated with the direct current channel structure, the second direction is perpendicular to the first direction, and the battery unit component is arranged opposite to the direct current area or opposite to the direct current area and the reve