Cold plate, battery pack, and powered device

Abstract

The utility model relates to a kind of cold plate, battery pack and electric device, comprising: plate body, fluid passage is equipped in it;The plate body forms the inlet end for fluid to enter the fluid passage along the one end of first direction, and the other end forms the outlet end for fluid to flow out the fluid passage;Heat exchange structure is located in the fluid passage;From the inlet end to the outlet end, the distribution of heat exchange structure in the fluid passage gradually dense. From the inlet end to the outlet end of plate body, the distribution of heat exchange structure in the fluid passage gradually dense, and the heat exchange effect of cold plate and fluid in the position where heat exchange structure distribution dense is superior to the position where heat exchange structure distribution sparse, through this mode, the adverse effects brought by the temperature difference of fluid in each place in fluid passage can be weakened or offset, so that the temperature of battery monomer tends to be consistent, and the uniformity of battery monomer is improved.

Claims

1. A cold plate characterized by, include: A plate (10) is provided with a fluid channel (11) therein; one end of the plate (10) along the first direction (X) forms an inlet end (12) for fluid to enter the fluid channel (11), and the other end forms an outlet end (13) for fluid to flow out of the fluid channel (11); A heat exchange structure (20) is disposed in the fluid channel (11); from the inlet end (12) to the outlet end (13), the distribution of the heat exchange structure (20) in the fluid channel (11) gradually becomes denser.

2. The cold plate of claim 1, wherein, The fluid channel (11) includes a first edge region (111), a middle region (112), and a second edge region (113) along the second direction (Z); the first direction (X) and the second direction (Z) intersect. The heat exchange structure (20) is more densely distributed in the first edge region (111) and the second edge region (113) than in the middle region (112).

3. The cold plate of claim 2, wherein, The intermediate region (112) includes a first region (1121), a second region (1122), and a third region (1123) distributed sequentially along the second direction (Z); The heat exchange structure (20) is more densely distributed in the first region (1121) and the third region (1123) than it is distributed in the second region (1122).

4. The cold plate of claim 1, wherein, The heat exchange structure (20) includes at least one of stiffeners (21), fins (22), and channel portions (23); The two ends of the stiffener (21) along the third direction (Y) are respectively connected to the inner wall of the fluid channel (11), and the fin (22) protrudes from the surface of the stiffener (21) along the second direction (Z). The channel portion (23) is protruding or recessed on the inner wall of the fluid channel (11) and has a first channel (231) through which the fluid flows; The first direction (X), the second direction (Z), and the third direction (Y) intersect each other.

5. The cold plate of claim 4, wherein, The fluid channel (11) includes, along the second direction (Z), a first edge region (111), a middle region (112), and a second edge region (113); The heat exchange structure (20) is more densely distributed in the first edge region (111) and the second edge region (113) than in the middle region (112); the heat exchange structure (20) in the first edge region (111) and the second edge region (113) includes the stiffener (21), the fin (22) and the channel portion (23).

6. The cold plate of claim 1, wherein, The cold plate also includes a first current collector (30) and a second current collector (40); The first collector (30) is installed at the inlet end (12) and has a fluid inlet (31) communicating with the fluid channel (11); the second collector (40) is installed at the outlet end (13) and has a fluid outlet (41) communicating with the fluid channel (11).

7. The cold plate of claim 6, wherein, The first current collector (30) has a first current collection cavity (32), and the second current collector (40) has a second current collection cavity (42); the fluid channel (11) includes a plurality of sub-channels (114) arranged relatively independently along the second direction (Z), and each of the sub-channels (114) extends along the first direction (X); Along the second direction (Z), one of the sub-channels (114) located at one edge is connected at both ends to the fluid inlet (31) and the corresponding second collection cavity (42), respectively. Another sub-channel (114) located at the other edge is connected at both ends to the fluid outlet (41) and the corresponding first collection cavity (32), respectively. The remaining sub-channels (114) located in the middle position are connected at both ends to the corresponding first collection cavity (32) and the second collection cavity (42), respectively. The first direction (X) and the second direction (Z) intersect. The fluid flows in opposite directions in the two adjacent sub-channels (114).

8. A battery pack, characterized by, It includes a battery pack (200) and a cold plate as described in any one of claims 1-7, wherein the plate body (10) of the cold plate is sandwiched between two adjacent battery packs (200) along a third direction (Y); each battery pack (200) includes a plurality of battery cells (201) arranged sequentially along the first direction (X); The first direction (X) and the third direction (Y) intersect.

9. The battery pack according to claim 8, characterized in that, The height h of the cold plate in the second direction (Z) and the height H of the battery cell (201) in the second direction (Z) satisfy: 0.6≤h / H≤0.95; The cold plate forms a gap between at least one end in the second direction (Z) and the end of the battery cell (201); The first direction (X), the second direction (Z), and the third direction (Y) intersect each other.

10. An electrical device, characterized in that, Includes the battery pack as described in claim 8 or 9.

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