Liquid cooling module

Abstract

The utility model provides a liquid cooling module which is characterized in that a plurality of cells are arranged in parallel to form a battery pack, end plates are respectively arranged at two ends of the battery pack, a positive pole and a negative pole are arranged at the top of each cell, a plurality of busbars are arranged on the battery pack, and the positive pole and the negative pole of each cell are respectively connected by the busbars. The liquid cooling plate is arranged at the top of the battery cell and located between the positive pole and the negative pole, and the heat conduction structural adhesive is arranged between the liquid cooling plate and the top of the battery pack; the liquid cooling plate is arranged between the positive pole and the negative pole by fully utilizing the protruding heights of the positive pole and the negative pole, so that the space occupied by the liquid cooling plate in height is reduced, and the space utilization rate is improved; the liquid cooling plate is integrated on the battery module, so that the material of the liquid cooling plate is reduced, and the cost is reduced; the liquid cooling plate is arranged at the top of the battery cell, so that the risks of poor insulation, short circuit and the like caused by liquid cooling plate breakage due to bottom collision of the battery pack are reduced, and the safety of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the field of lithium-ion batteries, in particular to a liquid cooling module. Background Art

[0002] The liquid cooling system can effectively cool the battery module and improve the battery's working efficiency and life. During the charging and discharging process, the battery will generate heat. Excessive temperature will cause the battery performance to decline or even damage. The liquid cooling system can remove the heat from the battery through the circulating coolant and keep the battery within a suitable operating temperature range. This can improve the battery's cycle life and safety performance, reduce the risk of failure, and the liquid-cooled battery module has a higher power density.

[0003] The existing liquid cooling plate is arranged at the bottom of the battery box, taking up space in the height direction. Moreover, when the bottom of the battery pack is bumped, it is easy to rupture and cause coolant leakage, thereby causing insulation risks and even causing battery short circuit, threatening the safety of passengers.

[0004] Moreover, the heat generated by the bus is difficult to dissipate. The heat is transferred to the battery cell body and then to the bottom liquid cooling plate. Therefore, a bus with a larger cross-section is needed to conduct current and dissipate heat. Most battery pack liquid cooling plates cover the entire bottom of the battery pack, which is relatively expensive.

[0005] To this end, we propose a liquid cooling module to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to solve the shortcomings of the prior art. In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A liquid cooling module comprises a battery cell, an end plate, a bus bar, a thermally conductive structural adhesive and a liquid cooling plate; a plurality of the battery cells are arranged in parallel to form a battery pack, end plates are respectively arranged at both ends of the battery pack, positive and negative poles are arranged on the top of the battery cells, a plurality of bus bars are arranged on the battery pack, the plurality of bus bars respectively connect the positive and negative poles of the battery cells and output at both ends of the battery pack, the liquid cooling plate is arranged on the top of the battery cell and is located between the positive and negative poles, and the thermally conductive structural adhesive is arranged between the liquid cooling plate and the top of the battery pack.

[0008] Further preferably, the inner cavity of the liquid cooling plate is provided with a plurality of cold liquid cavities, and both ends of the plurality of cold liquid cavities are respectively connected with a water inlet and a water outlet.

[0009] Further preferably, the width of the liquid cooling plate is smaller than the distance between the positive and negative poles of the battery cell.

[0010] Further preferably, the liquid cooling plate is a U-shaped structure.

[0011] Further preferably, buffer foam is arranged between adjacent battery cells.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model makes full use of the protruding height of the positive and negative poles, arranges the liquid cooling plate between the positive and negative poles, reduces the space occupied by the liquid cooling plate in height, and improves space utilization; the liquid cooling plate is integrated on the battery module, and compared with covering the bottom of the battery pack, it reduces the liquid cooling plate material and reduces the cost; the liquid cooling plate is arranged on the top of the battery cell, which reduces the risk of poor insulation, short circuit, etc. caused by the liquid cooling plate rupture due to collision with the bottom of the battery pack, thereby improving the safety of the battery pack.

[0014] The heat generated by the battery cell and the bus is conducted to the top of the battery cell, and then to the liquid cooling plate through the heat conducting medium. The coolant circulates to reduce the temperature. When the battery cell is working, the bus dissipates heat quickly, and a large-section bus is not required to conduct current and dissipate heat, thereby reducing the bus cross-section and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the explosion of the utility model Figure 1 ;

[0016] Figure 2 Schematic diagram of the explosion of the utility model Figure 2 ;

[0017] Figure 3 It is a schematic diagram of the assembly of the utility model;

[0018] Figure 4 It is a schematic diagram of the structure of the liquid cooling plate;

[0019] Figure 5 for Figure 4 Cross-sectional view of the liquid cooling plate at AA.

[0020] In the figure: battery cell 1, buffer foam 2, end plate 3, bus bar 4, thermal conductive structural adhesive 5, liquid cooling plate 6, water inlet 61, water outlet 62, cold liquid cavity 63. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-Figure 5A liquid cooling module comprises a battery cell 1, an end plate 3, a bus bar 4, a thermally conductive structural adhesive 5 and a liquid cooling plate 6; a plurality of the battery cells 1 are arranged in parallel to form a battery pack, end plates 3 are respectively arranged at both ends of the battery pack, a positive and a negative electrode column are arranged on the top of the battery cell 1, a plurality of bus bars 4 are arranged on the battery pack, the plurality of bus bars 4 respectively connect the positive and negative electrode columns of the battery cell 1, and output at both ends of the battery pack, the liquid cooling plate 6 is arranged on the top of the battery cell 1 and is located between the positive and negative electrode columns, and the thermally conductive structural adhesive 5 is arranged between the liquid cooling plate 6 and the top of the battery pack.

[0023] In the embodiment: the upper surface of the liquid cooling plate is flush with the upper surfaces of the positive and negative poles, or the upper surface of the liquid cooling plate is slightly lower than the upper surfaces of the positive and negative poles, and the liquid cooling plate is arranged between the positive and negative poles to reduce the space occupied by the liquid cooling plate in height and improve space utilization; the liquid cooling plate is integrated on the battery module, which reduces the width of the liquid cooling plate, reduces the material of the liquid cooling plate, and reduces the cost compared to covering the entire bottom of the battery pack.

[0024] The liquid cooling plate is set on the top of the battery cell to reduce the risk of the liquid cooling plate breaking due to collision with the bottom of the battery pack, causing poor insulation and short circuit, thereby improving the safety of the battery pack. The liquid cooling plate set on the top of the battery cell is less likely to be blocked during heat dissipation than that set at the bottom, and the heat dissipation effect is better.

[0025] The inner cavity of the liquid cooling plate 6 is provided with a plurality of cold liquid cavities 63, and the two ends of the plurality of cold liquid cavities 63 are respectively connected with a water inlet 61 and a water outlet 62; the width of the liquid cooling plate 6 is smaller than the distance between the positive and negative poles of the battery cell 1; the liquid cooling plate 6 is a U-shaped structure.

[0026] In the embodiment: the liquid cooling plate 6 is a U-shaped structure, the water inlet 61 and the water outlet 62 are respectively located at the two ends of the U-shaped structure, the coolant enters from the water inlet 61, passes through the cold liquid cavity 63, and flows out from the water outlet 62, the heat generated by the battery cell and the bus is conducted to the top of the battery cell, and is conducted to the liquid cooling plate through the heat conductive medium, and the coolant circulates to reduce the temperature; the coolant circulates through the water inlet 61 and the water outlet 62 to achieve a cooling effect.

[0027] The width of the U-shaped liquid cooling plate 6 is smaller than the spacing between the positive and negative poles of the battery cell 1. Compared with covering the bottom of the battery pack, it reduces the width of the liquid cooling plate, reduces the intermediate material of the U-shaped liquid cooling plate 6, reduces the liquid cooling plate material, and reduces the cost.

[0028] Buffer foams 2 are arranged between adjacent battery cells 1. When the battery cells expand or are squeezed, the buffer foams 2 buffer the pressure, so that the battery cells are evenly stressed and are not easily crushed.

[0029] The sides of the battery pack and the end plate 3 are wrapped with straps, and the straps are used to tightly bind the battery pack and the end plate; at least two straps are provided, and at least two of the straps are spaced apart and distributed along the height direction of the battery pack.

[0030] In the embodiment: there are two binding straps, which are wound around the upper and lower sides of the battery pack at intervals, and the battery pack and the end plate are fastened and fixed by the binding straps.

[0031] The utility model makes full use of the protruding height of the positive and negative poles, arranges the liquid cooling plate between the positive and negative poles, reduces the space occupied by the liquid cooling plate in height, and improves space utilization; the liquid cooling plate is integrated on the battery module, and compared with covering the bottom of the battery pack, it reduces the liquid cooling plate material and reduces the cost; the liquid cooling plate is arranged on the top of the battery cell, which reduces the risk of poor insulation and short circuit caused by the liquid cooling plate rupture caused by the bottom of the battery pack, thereby improving the safety of the battery pack; the heat generated by the battery cell and the bus is conducted to the top of the battery cell, and then conducted to the liquid cooling plate through the heat conductive medium, and the coolant circulates to reduce the temperature. When the battery cell is working, the bus dissipates heat quickly, and there is no need for a large cross-section bus to conduct current and dissipate heat, thereby reducing the cross-section of the bus and reducing costs.

Claims

1. A liquid cooling module, characterized in that: It includes battery cells, end plates, bus bars, thermally conductive structural adhesive and liquid cooling plates; multiple battery cells are arranged in parallel to form a battery pack, end plates are respectively arranged at both ends of the battery pack, positive and negative poles are arranged on the top of the battery cells, multiple bus bars are arranged on the battery pack, the multiple bus bars connect the positive and negative poles of the battery cells respectively and output at both ends of the battery pack, the liquid cooling plate is arranged on the top of the battery cell and is located between the positive and negative poles, and the thermally conductive structural adhesive is arranged between the liquid cooling plate and the top of the battery pack.

2. A liquid cooling module according to claim 1, characterized in that: The inner cavity of the liquid cooling plate is provided with a plurality of cold liquid cavities, and both ends of the plurality of cold liquid cavities are respectively connected with a water inlet and a water outlet.

3. A liquid cooling module according to claim 1, characterized in that: The width of the liquid cooling plate is smaller than the distance between the positive and negative poles of the battery cell.

4. A liquid cooling module according to claim 3, characterized in that: The liquid cooling plate is a U-shaped structure.

5. The liquid cooling module according to claim 1, characterized in that: Buffer foam is arranged between adjacent battery cells.

6. The liquid cooling module according to claim 1, characterized in that: The sides of the battery pack and the end plate are wrapped with binding straps, and the binding straps are used to bind the battery pack and the end plate tightly.

7. A liquid cooling module according to claim 6, characterized in that: At least two of the binding straps are provided, and the at least two binding straps are spaced apart and distributed along the height direction of the battery pack.

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