Liquid cooling plate, battery pack and vehicle

Abstract

The utility model discloses a liquid cooling plate, battery pack and vehicle, liquid cooling plate includes superposing surface plate and runner plate, surface plate and runner plate are connected, the surface of surface plate departing from the runner plate is fixed with a plurality of protection strip, the length direction of the plurality of protection strip is along the first direction and in the second direction interval arrangement, the length direction of the plurality of protection strip is along the first direction, and the length direction of the plurality of protection strip is along the second direction interval arrangement. The first direction is perpendicular to the second direction; the liquid cooling plate can be used for bearing a battery cell, the base angle of the battery cell can be supported on the protection strip, and the protection strip is used for reducing extrusion of the base angle of the battery cell on the surface plate, reducing or avoiding deformation of a flow channel of the liquid cooling plate and ensuring the heat conduction performance of the liquid cooling plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric automobile technical field, concretely relates to a liquid cooling panel, battery pack and vehicle. BACKGROUND

[0002] In prior art, the CTP (CELL TO PACK) battery pack is loaded with battery cells through a liquid cooling panel, and the battery cells are cooled through the liquid cooling panel. Because the rigidity of the bottom corner of the battery cell is high, under the vibration / impact working condition, the liquid cooling panel is easily deformed by the battery cell bottom corner at the position corresponding to the bottom corner of the battery cell shell, which causes the flow channel of the liquid cooling panel to be deformed, thereby affecting the heat conduction performance of the liquid cooling panel. SUMMARY

[0003] The utility model discloses a liquid cooling panel, at least to some extent, solve the above technical problems in prior art, avoid the deformation of the liquid cooling panel at the position corresponding to the bottom corner of the battery cell under the vibration or impact working condition.

[0004] The battery pack liquid cooling panel according to the utility model embodiment comprises a plane plate and a flow channel plate, the plane plate is connected with the flow channel plate, the surface of the plane plate away from the flow channel plate is fixed with a plurality of protection strips, the plurality of protection strips are arranged in a first direction and a second direction, the first direction is perpendicular to the second direction, the liquid cooling panel can be used to load battery cells, the bottom corner of the battery cell can be supported on the protection strip, and the protection strip is used to reduce the extrusion of the bottom corner of the battery cell on the plane plate.

[0005] Further, the first direction is the length direction of the liquid cooling panel, the second direction is the width direction of the liquid cooling panel, and the protection strip comprises a plurality of sub-protection strips in the first direction.

[0006] According to some embodiments of the utility model, the protection strip is a PCM composite material, and the protection strip is bonded to the surface of the plane plate.

[0007] According to some embodiments of the utility model, the protection strip is a foam material, and the protection strip is bonded to the surface of the plane plate.

[0008] According to some embodiments of the utility model, the protection strip is an aluminum or aluminum alloy material, and the protection strip is welded to the surface of the plane plate.

[0009] According to some embodiments of the utility model, the thickness of the protection strip is 0.5mm-2mm, and the width is 10mm-30mm.

[0010] The utility model also proposes a kind of battery pack, including multiple electric core and the liquid cooling plate described in any one of preceding, multiple electric core is arranged on the flat plate of liquid cooling plate, it is arranged along the first direction, the bottom corner of electric core is supported on the protection strip.

[0011] According to some embodiments of the utility model, the electric core includes a first face with the largest area, and the first face is perpendicular to the first direction.

[0012] Further, the battery pack includes at least two columns of electric cores arranged along a second direction, wherein adjacent bottom corners of adjacent two columns of electric cores are commonly supported on the protection strip.

[0013] The utility model also proposes a vehicle with the above liquid cooling plate or battery pack.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The battery pack liquid cooling plate, the battery pack and the vehicle provided by the utility model embodiment increase protection of the liquid cooling plate, reduce or avoid extrusion deformation of the bottom corner of the electric core on the liquid cooling plate under vibration or impact working conditions, and ensure the heat conduction performance of the liquid cooling plate. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is the schematic diagram of the liquid cooling plate provided by an embodiment of the utility model;

[0017] Fig. 2 is the schematic diagram of partial structure of the battery pack provided by an embodiment of the utility model;

[0018] Fig. 3 is the schematic diagram of partial structure of the battery pack provided by an embodiment of the utility model.

[0019] BRIEF DESCRIPTION OF DRAWINGS

[0020] 1, battery pack liquid cooling plate; 11, flat plate; 12, flow channel plate; 121, flat part; 122, concave part; 2, protection strip; 21, sub-protection strip; 3, electric core. DETAILED DESCRIPTION

[0021] In the following description, many specific details are set forth in order to provide a thorough understanding of the utility model. However, the utility model can be practiced in many different ways from those described herein, and skilled in the art can make similar generalization without departing from the utility model connotation, therefore the utility model is not limited to the specific implementation disclosed below.

[0022] The utility model discloses an embodiment of a kind of battery pack, including bottom guard plate structure, for the bottom of the battery pack is protected, prevent the structure of battery pack bottom after being bumped to be damaged to cause the damage of the battery pack inside electric core or electric connection component.

[0023] Referring to Figs. 1-3 As shown in the utility model provides an embodiment, the battery pack liquid cooling plate 1 includes laminated flat panel 11 and flow channel plate 12. Flow channel plate 12 includes flat part 121 and recess 122, flat panel 11 is stacked with flow channel plate, and flat part 121 of flow channel plate 12 is connected with flat panel 1 by bonding or brazing, so that recess 122 forms closed flow channel. The surface of flat panel 1 away from flow channel plate 2 is provided with multiple protection strips 3, and the length direction of multiple protection strips 3 extends along the first direction and is spaced apart in the second direction, wherein the first direction is perpendicular to the second direction. Liquid cooling plate 1 is applied to battery pack for heat dissipation to electric core 3, and electric core 3 is carried on the surface of flat panel 11 of battery pack liquid cooling plate 1 away from flow channel plate 12, and the bottom surface of electric core 3 is bonded with the surface of flat panel 11 away from flow channel plate 12 by heat-conducting adhesive, and the bottom corner of heat-conducting adhesive electric core 3 is supported on protection strip 3. In one case, during vehicle driving, the bump of road surface makes the battery pack be in vibration condition, and due to the high rigidity of the bottom corner of electric core 3, the position corresponding to the bottom corner of electric core 3 of flat panel 11 is extruded, to cause the deformation of the position corresponding to the bottom corner of electric core 3 of flat panel 11. In another case, when vehicle passes through the road surface of pit or protrusion, the bottom of vehicle is impacted by bottoming, and the bottom of battery pack is extruded, and the bottom corner of electric core 3 can cause the extrusion of the position corresponding to the bottom corner of electric core 3 of flat panel 11, to cause the deformation of flat panel 11. By fixing protection strip 2 at the position corresponding to the bottom corner of electric core 3 of flat panel 11, protection strip 2 protects the position corresponding to the bottom corner of electric core 3 of flat panel 11, to reduce the extrusion of the position corresponding to the bottom corner of electric core 3 of flat panel 11 under vibration or impact condition, avoid the deformation of flow channel of liquid cooling plate 1, and ensure the heat-conducting performance of liquid cooling plate 1.

[0024] Further, the first direction is the length direction of the liquid cooling plate 1, the second direction is the width direction of the liquid cooling plate 1, the length direction of the plurality of protection strips 2 is the same as the length direction of the liquid cooling plate 1, and the plurality of protection strips 2 are spaced apart in the width direction of the liquid cooling plate 1. Further, each protection strip 2 includes a plurality of sub-protection strips 21 arranged in the first direction.

[0025] In another embodiment, the first direction can be the width direction of the liquid cooling plate 1, the second direction is the length direction of the liquid cooling plate 1, the length direction of the plurality of protection strips 2 is the same as the width direction of the liquid cooling plate 1, and the plurality of protection strips 2 are spaced apart in the length direction of the liquid cooling plate 1. The arrangement of the protection strips 2 can be selected according to the arrangement of the electric cores 3 in the battery pack.

[0026] In an embodiment, the protection strip 2 is a PCM composite material, and the protection strip 2 is fixed to the surface of the plane plate 11 by adhesive bonding. The protection strip 2 of the PCM (Prepreg Compression Molding) composite material has appropriate strength and low density, and strengthens the position of the plane plate 11 corresponding to the bottom corner of the battery cell 3, thereby reducing the deformation of the plane plate 11 caused by extrusion. Specifically, the base resin of the composite material includes one or more of polycarbonate, epoxy resin, phenolic resin, bismaleimide, etc. The reinforcing fibers in the composite material include one or more of glass fiber, carbon fiber, aramid fiber, basalt fiber, etc.

[0027] In another embodiment, the protection strip 2 is a foam material, and the protection strip 2 is fixed to the surface of the plane plate 11 by adhesive bonding. The protection strip 2 of the foam material has a buffering effect, thereby reducing the deformation of the plane plate 11 caused by extrusion. Specifically, the foam includes one or more of PU foam, CR foam, EPE foam, EVA foam, SBR foam, EPDM foam, etc.

[0028] In another embodiment, the protection strip 2 is an aluminum or aluminum alloy material, and the protection strip 2 is fixed to the surface of the plane plate 11 by welding. The aluminum or aluminum alloy protection strip 2 is fixed to the surface of the plane plate 11 by welding, and the process is simple.

[0029] Further, in the above embodiment, the thickness of the protection strip is 0.5mm-2mm, and the width is 10mm-30mm. The thickness of the protection strip 2 is selected according to the design requirements of the thickness of the adhesive layer bonding the battery cell 3 to the surface of the plane plate 11 and the material of the protection strip 2.

[0030] The utility model also provides a CTP battery pack, including preceding liquid cooling plate 1, liquid cooling plate 1 sets up in battery pack frame (not shown) bottom side, the length direction of protection strip 2 on plane plate 11 is along first direction, and a plurality of protection strips 2 are arranged at intervals in the second direction, wherein, first direction is the length direction of liquid cooling plate 1, and it is also the length direction of battery pack, and second direction is the width direction of liquid cooling plate 1, and it is also the width direction of battery pack. A plurality of battery cells 3 are carried on the liquid cooling plate 1, and the battery cell 3 is a square shell battery cell, includes the first face of the largest area, and a plurality of battery cells 3 are arranged as a column along the first direction in the manner that the first face is perpendicular to the first direction. At least two columns of battery cells 3 are included in the second direction. The bottom corner of each battery cell 3 is supported on a protection strip 2, wherein the adjacent bottom corners of the two adjacent columns of battery cells 3 in the second direction are commonly supported on the same protection strip 2.

[0031] The utility model also provides a vehicle, including preceding embodiment's liquid cooling board or preceding embodiment's battery pack. Battery pack can be detachably fixed at the bottom side of the vehicle body, and the vehicle can automatically replace the same type of battery pack in the battery swap station.

[0032] The liquid cooling board, the battery pack and the vehicle provided by the utility model can at least obtain the beneficial effects as follows: the protection of the liquid cooling board is increased, the extrusion of the bottom corner of the battery cell to the liquid cooling board under the vibration or impact working condition is reduced or avoided to cause the liquid cooling to deform, and the heat conduction performance of the liquid cooling board is ensured.

[0033] It should be explained that the utility model discloses the above with preferable embodiment, but it is not used to limit the utility model, and any person skilled in the art can make possible change and modification without departing from the spirit and scope of the utility model, therefore the protection scope of the utility model should be accurate with the range defined in the utility model claim.

Claims

1. A liquid-cooled plate, characterized in that, The liquid cooling plate comprises a plurality of protection strips fixed on the surface of the flat plate away from the flow channel plate, the length direction of the plurality of protection strips is along the first direction and is arranged in the second direction, the first direction is perpendicular to the second direction; the liquid cooling plate can be used to carry the battery cell, the bottom corner of the battery cell can be supported on the protection strip, and the protection strip is used to reduce the extrusion of the bottom corner of the battery cell on the flat plate.

2. The liquid cold plate of claim 1, wherein, The first direction is the length direction of the liquid cooling plate, the second direction is the width direction of the liquid cooling plate, and the protection strip comprises a plurality of sub-protection strips in the first direction.

3. The liquid cold plate of claim 1, wherein, The protection strip is a PCM composite material, and the protection strip is bonded to the surface of the flat plate.

4. The liquid cold plate of claim 1, wherein, The protection strip is foam, and the protection strip is bonded to the surface of the flat plate.

5. The liquid cold plate of claim 1, wherein, The protection strip is an aluminum or aluminum alloy material, and the protection strip is welded to the surface of the flat plate.

6. The liquid cold plate of claim 1, wherein, The thickness of the protection strip is 0.5mm-2mm, and the width is 10mm-30mm.

7. A battery pack, characterized by, The liquid cooling plate comprises a plurality of battery cells and the liquid cooling plate of any one of claims 1-6, the plurality of battery cells are arranged on the flat plate of the liquid cooling plate and arranged in a column along the first direction, and the bottom corner of the battery cell is supported on the protection strip.

8. The battery pack of claim 7, wherein, The battery cell comprises a first face with the largest area, and the first face is perpendicular to the first direction.

9. The battery pack of claim 8, wherein, At least two columns of battery cells arranged along the second direction are arranged, wherein adjacent bottom corners of adjacent two columns of battery cells are jointly supported on the same protection strip.

10. A vehicle characterized by comprising: The battery pack liquid cooling plate comprises the liquid cooling plate of any one of claims 1-6, Or the battery pack of any one of claims 7-9.

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