Integrated liquid cooling heat dissipation structure for large cylindrical battery of new energy heavy truck

Abstract

The utility model belongs to the field of battery heat dissipation, and particularly relates to an integrated liquid cooling heat dissipation structure for a large cylindrical battery of a new energy heavy truck. The utility model provides an integrated liquid cooling heat dissipation structure for a large cylindrical battery of a new energy heavy truck, which comprises heat conduction support plates which cover two ends of the battery and are stacked layer by layer, and the support plates are provided with bosses matched with tabs of the battery; and the liquid cooling pipeline penetrates through the supporting plate from the battery gap. According to the integrated liquid cooling heat dissipation structure for the large cylindrical battery of the new energy heavy truck, the overall heat dissipation efficiency can be greatly improved; a heat dissipation blind area does not exist, so that all places, including the tabs, of the battery are fully dissipated; meanwhile, space utilization is reasonable, and energy density is not affected.

Description

Integrated liquid cooling structure for large cylindrical batteries in new energy heavy-duty trucks Technical Field

[0001] This utility model belongs to the field of battery heat dissipation, specifically relating to an integrated liquid cooling heat dissipation structure for large cylindrical batteries in new energy heavy-duty trucks. Background Technology

[0002] Existing liquid cooling modules for power batteries generally use serpentine cooling pipes. This pipe layout takes up a lot of module space and affects energy density. Moreover, this heat dissipation structure cannot take into account the battery tabs, so that the local high heat cannot be dissipated. In addition, the overall heat dissipation efficiency of this heat dissipation mechanism is low and often fails to meet the requirements. Summary of the Invention

[0003] The integrated liquid-cooled heat dissipation structure for large cylindrical batteries in new energy heavy-duty trucks provided by this utility model can effectively solve the problems in the background technology.

[0004] This utility model provides an integrated liquid-cooled heat dissipation structure for large cylindrical batteries in new energy heavy-duty trucks, including...

[0005] A layered, heat-conducting support plate is installed at both ends of the battery, and the support plate has protrusions that mate with the battery's tabs; and

[0006] Liquid cooling pipes run through the support plate between the batteries.

[0007] As a further optimization of this utility model, the support plate is made of a composite material of polyimide filled with aluminum nitride.

[0008] As a further optimization of this utility model, the surface of the support plate is coated with a magnesium oxide layer.

[0009] As a further optimization of this utility model, fins are provided inside the liquid cooling pipe.

[0010] As a further optimization of this utility model, the fin height is 0.2-0.5mm.

[0011] As a further optimization of this utility model, the liquid cooling pipeline circulates an ethylene glycol solution with a content of 40%-60%.

[0012] As a further optimization of this utility model, the bosses are distributed in a ring array or a rectangular array.

[0013] As a further optimization of this utility model, the support plate is provided with a sleeve corresponding to the liquid cooling pipe.

[0014] The integrated liquid cooling structure for the large cylindrical battery of new energy heavy-duty trucks provided by this utility model can significantly improve the overall heat dissipation efficiency; there are no heat dissipation blind spots, so that all parts of the battery, including the tabs, can be fully cooled; at the same time, the space is used reasonably without affecting the energy density. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the external structure of this embodiment;

[0016] Figure 2 is a schematic diagram of the support plate structure in Figure 1;

[0017] Figure 3 is a schematic diagram of the structure from another perspective of Figure 2;

[0018] Figure 4 is a schematic diagram of the liquid cooling pipeline structure in Figure 1;

[0019] The components include a support plate 1, a boss 1a, a sleeve 1b, a liquid cooling pipe 2, a fin 2a, a battery 3, and an electrode tab 3a. Detailed Implementation

[0020] As shown in Figures 1-4, this embodiment includes a support plate 1 and a liquid cooling pipe 2.

[0021] The support plate 1 and the battery 3 adopt a stacked structure of one layer of support plate 1, one layer of battery 3, another layer of support plate 1, and another layer of battery 3. Both sides of the support plate 1 are provided with protrusions 1a corresponding to the positive and negative electrode tabs 3a of the battery 3. The protrusions 1a are provided with slots corresponding to the shape of the electrode tabs 3a. The electrode tabs 3a are inserted into the slots and are interference-fitted with the slots.

[0022] The purpose of setting the boss 1a is, on the one hand, to make the support plate 1 and the battery 3 fit together more securely and prevent shaking; on the other hand, the boss 1a can dissipate heat from the tab 3a, because the support plate 1 in this embodiment is supported by a material with high thermal conductivity, specifically, a composite material of polyimide filled with aluminum nitride.

[0023] In this embodiment, the boss 1a is arranged in a rectangular array. In other embodiments, the boss 1a may also be arranged in a circular array.

[0024] In this embodiment, a magnesium oxide layer is also plated on the surface of the support plate 1, which, together with the insulating material of the support plate 1 itself, gives it a double insulation effect and improves safety performance.

[0025] The liquid cooling pipe 2 is located between the gaps of the batteries 3 and passes through the support plate 1. When the batteries 3 are cylindrical, there will inevitably be gaps between the batteries 3. In this embodiment, the liquid cooling pipe 2 makes full use of these gaps and does not occupy any additional space, making the overall structure more reasonable.

[0026] In this embodiment, serrated microfins 2a with a height of 0.2-0.5mm are installed inside the liquid cooling pipe 2. The fins 2a can increase the contact area between the liquid cooling pipe 2 and the coolant circulating inside, thereby improving the heat dissipation effect. Due to the unique structure of this embodiment, the liquid cooling pipes 2 passing through the support plate 1 are all straight. The cost of installing fins 2a in straight pipes is lower than that of curved structures, which is one of the advantages of this embodiment over the prior art that uses serpentine pipes. Moreover, using straight pipes to pass through the support plate 1 can further enhance the stability of the module.

[0027] In this embodiment, a sleeve 1b is provided on the support plate 1 at the position corresponding to the liquid cooling pipe 2. The sleeve 1b facilitates the positioning and insertion of the liquid cooling pipe 2; it also increases the contact area between the liquid cooling pipe 2 and the support plate 1, thereby improving the heat dissipation effect; and it also enhances the stability of the assembly between the liquid cooling pipe 2 and the support plate 1.

[0028] Preferably, the coolant circulating in the liquid cooling pipe 2 is an ethylene glycol solution with a content of 40%-60%. Through numerous experiments, it has been found that using an ethylene glycol solution with a content of 40%-60% has an excellent heat dissipation effect.

[0029] This embodiment has two heat conduction paths. One is that heat is transferred from the tab 3a of the battery 3 to the protrusion 1a, then to the body of the support plate 1, then to the liquid cooling pipe 2, and finally to the coolant. The other is that heat is transferred from the casing of the battery 3 to the surface radiation layer of the support plate 1, and finally to the environment.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. An integrated liquid-cooled heat dissipation structure for large cylindrical batteries in new energy heavy-duty trucks, characterized in that, It includes thermally conductive support plates that are stacked on both ends of the battery, with protrusions on the support plates that mate with the battery tabs; and liquid cooling pipes that pass through the support plates from between the batteries.

2. The integrated liquid-cooled heat dissipation structure for large cylindrical batteries in new energy heavy-duty trucks according to claim 1, characterized in that, The support plate is made of a composite material of polyimide filled with aluminum nitride.

3. The integrated liquid-cooled heat dissipation structure for large cylindrical batteries in new energy heavy-duty trucks according to claim 1, characterized in that, The surface of the support plate is coated with a magnesium oxide layer.

4. The integrated liquid-cooled heat dissipation structure for large cylindrical batteries in new energy heavy-duty trucks according to claim 1, characterized in that, Fins are installed inside the liquid cooling pipes.

5. The integrated liquid-cooled heat dissipation structure for large cylindrical batteries in new energy heavy-duty trucks according to claim 4, characterized in that, The fin height is 0.2-0.5mm.

6. The integrated liquid-cooled heat dissipation structure for large cylindrical batteries in new energy heavy-duty trucks according to claim 1, characterized in that, The liquid cooling pipeline circulates a 40%-60% ethylene glycol solution.

7. The integrated liquid-cooled heat dissipation structure for large cylindrical batteries in new energy heavy-duty trucks according to claim 1, characterized in that, The protrusions are distributed in a ring array or a rectangular array.

8. The integrated liquid-cooled heat dissipation structure for large cylindrical batteries in new energy heavy-duty trucks according to claim 7, characterized in that, The support plate is equipped with a sleeve corresponding to the liquid cooling pipe.

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