Heat dissipation device for cooling battery pack

Abstract

The utility model discloses a heat dissipation device for cooling a battery pack, the heat dissipation device comprises a liquid cooling heat exchange plate and a heat dissipation flow channel located in the liquid cooling heat exchange plate, the heat dissipation flow channel comprises a liquid inlet flow channel, a plurality of branch flow channels and a liquid outlet flow channel, the plurality of branch flow channels are distributed on the liquid cooling heat exchange plate in parallel, one end of the liquid inlet flow channel is communicated with the branch flow channels, one end of the liquid outlet flow channel is communicated with the branch flow channels, the other end of the liquid inlet flow channel is connected with a water inlet connector, and the other end of the liquid outlet flow channel is connected with a water outlet connector. According to the heat dissipation device, the anti-freezing cooling liquid flows in the heat dissipation flow channels in the liquid cooling heat exchange plate, cooling and heat dissipation can be conducted on a plurality of battery packs placed at the upper end of the liquid cooling heat exchange plate, the branch flow channels are distributed on the liquid cooling heat exchange plate side by side, the battery packs can be evenly cooled, the temperature difference of the battery packs is reduced, and the heat dissipation efficiency of the battery packs is improved. And the working safety and stability of the battery pack are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile battery heat dissipation, in particular to a heat dissipation device for cooling a battery pack. Background Art

[0002] The heating of the battery is mainly caused by the heating elements inside the battery. The heating elements of the battery are mainly battery cells. In the existing battery structure, the battery cells are arranged relatively closely inside the battery, which will cause the battery to produce more heat, have high power, and have uneven heat dissipation. When the temperature difference of the battery in the container is greater than 10°C, the battery life will be shortened by more than 15%. The temperature rise difference between the battery packs will increase the internal resistance difference. Due to the barrel effect, the life of the entire battery will be further shortened. In addition, if the battery generates too much heat during operation and this heat cannot be dissipated quickly and effectively, the battery temperature will increase, reducing the battery efficiency. In severe cases, it will cause safety accidents such as battery fire or even explosion. Therefore, a heat dissipation structure is needed to cool the battery.

[0003] The existing heat dissipation structure is usually mainly composed of a heat exchange plate and a bottom plate. The bottom plate is fixed under the heat exchange plate, and the heat exchange plate is arranged under the battery pack. A flow channel is set inside the heat exchange plate, and antifreeze coolant flows in the flow channel. The heat generated by the battery is transferred through the heat exchange plate contacted by the battery surface, and the heat is taken away by the antifreeze coolant flowing in the flow channel inside the heat exchange plate. Although the existing heat dissipation structure can achieve the purpose of cooling the battery, the existing heat dissipation structure has the following shortcomings:

[0004] 1) The existing heat exchange plate has only one flow channel inside, which cannot evenly cool the battery pack above the entire heat exchange plate, which easily leads to uneven heat dissipation in the battery pack;

[0005] 2) The existing heat exchange plate has low heat dissipation efficiency, which affects the heat dissipation effect of the battery. Utility Model Content

[0006] In view of the problems existing in the prior art, the technical problem to be solved by the utility model is to provide a heat dissipation device which can perform flow diversion through multiple branch flow channels, improve the uniformity of the flow of antifreeze coolant, and be beneficial to improving the heat dissipation efficiency of the battery pack of new energy vehicles, and can evenly cool the battery pack, reduce the temperature difference of the battery pack, and improve the working safety and stability of the battery pack.

[0007] In order to solve the above technical problems, the utility model provides a heat dissipation device for cooling a battery pack, wherein the heat dissipation device includes a liquid-cooled heat exchange plate and a heat dissipation channel located inside the liquid-cooled heat exchange plate, and a plurality of battery packs are distributed on the upper end surface of the liquid-cooled heat exchange plate, and the heat dissipation channel includes a liquid inlet channel, a plurality of branch channels, and a liquid outlet channel, and the plurality of branch channels are distributed in parallel on the liquid-cooled heat exchange plate, one end of the liquid inlet channel is connected to a plurality of branch channels, one end of the liquid outlet channel is connected to a plurality of branch channels, the other end of the liquid inlet channel is connected to a water inlet joint, and the other end of the liquid outlet channel is connected to a water outlet joint.

[0008] As a further improvement of the above solution, a bare plate is fixed to the upper end of the liquid-cooled heat exchange plate.

[0009] As a further improvement of the above solution, the liquid-cooled heat exchange plate and the bare plate are pressed and brazed and stamped into an integrated structure.

[0010] As a further improvement of the above solution, each branch flow channel has a coil structure, and the position above each branch flow channel corresponds to a group of battery packs.

[0011] As a further improvement of the above scheme, the heat dissipation device includes two groups of limiting beams and positioning fixing parts, the two groups of limiting beams are symmetrically distributed, each group of limiting beams is provided with a number of spaced fixing holes, and the positioning fixing parts pass through the fixing holes of the two groups of limiting beams to respectively install the two groups of limiting beams on both sides of the liquid-cooled heat exchange plate.

[0012] As a further improvement of the above solution, the heat dissipation device includes a support seat, and the liquid-cooled heat exchange plate is installed above the support seat.

[0013] As a further improvement of the above scheme, the support seat includes a support frame, a plurality of transverse reinforcement tubes, and a plurality of longitudinal reinforcement tubes. A receiving groove is provided in the middle of the support frame. The plurality of transverse reinforcement tubes are distributed with spacing from each other along the horizontal direction of the receiving groove of the support frame, and the plurality of longitudinal reinforcement tubes are distributed with spacing from each other along the vertical direction of the receiving groove of the support frame. The plurality of transverse reinforcement tubes and the plurality of longitudinal reinforcement tubes are cross-connected to form an integrated reinforcement structure.

[0014] As a further improvement of the above solution, the support frame includes a front frame, a rear frame, a left frame, and a right frame, and the four sides of the liquid-cooled heat exchange plate are respectively installed on the upper ends of the front frame, the rear frame, the left frame, and the right frame.

[0015] Compared with the prior art, the solution of the utility model has at least the following beneficial effects:

[0016] The heat dissipation device of the utility model comprises a liquid-cooled heat exchange plate and a heat dissipation channel located inside the liquid-cooled heat exchange plate, a plurality of battery packs are distributed on the upper end surface of the liquid-cooled heat exchange plate, the heat dissipation channel comprises a liquid inlet channel, a plurality of branch channels, and a liquid outlet channel, the plurality of branch channels are distributed in parallel on the liquid-cooled heat exchange plate, one end of the liquid inlet channel is connected to the plurality of branch channels, one end of the liquid outlet channel is connected to the plurality of branch channels, the other end of the liquid inlet channel is connected to a water inlet joint, and the other end of the liquid outlet channel is connected to a water outlet joint. The heat dissipation device of the utility model utilizes antifreeze coolant to flow in the heat dissipation channel in the liquid-cooled heat exchange plate, and can cool down and dissipate heat for a plurality of battery packs placed on the upper end of the liquid-cooled heat exchange plate, and the antifreeze coolant is shunted respectively by a plurality of branch channels, so as to improve the uniformity of the flow of the antifreeze coolant, which is beneficial to improve the heat dissipation efficiency, and a plurality of branch channels are distributed in parallel on the liquid-cooled heat exchange plate, so as to evenly cool down the battery pack, reduce the temperature difference of the battery pack, and improve the safety and stability of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.

[0018] Figure 1 This is a schematic diagram of the overall structure of the heat dissipation device of the utility model. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the overall structure of the heat dissipation device of the utility model. Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the relationship between the liquid cooling heat exchange plate and the silicone thermal pad of the utility model;

[0021] Figure 4 It is a schematic diagram of the relationship between the liquid-cooled heat exchange plate and the support seat of the utility model.

[0022] In the figure, there are a liquid-cooled heat exchange plate 1, a heat dissipation channel 11, a liquid inlet channel 111, a branch channel 112, a liquid outlet channel 113, a water inlet joint 13, a water outlet joint 14, a support seat 2, a support frame 21, a receiving groove 211, a front frame 212, a rear frame 213, a left frame 214, a right frame 215, a transverse reinforcement tube 22, a longitudinal reinforcement tube 23, a mounting part 24, a battery pack 3, a silicone thermal pad 4, a limiting beam 5, a positioning fixing part 51, and a light panel 6. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1-3 As shown, the first embodiment of the utility model provides a heat dissipation device for cooling a battery pack 3, the heat dissipation device includes a liquid-cooled heat exchange plate 1 and a heat dissipation channel 11 located inside the liquid-cooled heat exchange plate 1, the heat dissipation channel 11 can be used for circulating antifreeze coolant, a plurality of battery packs 3 are distributed on the upper end surface of the liquid-cooled heat exchange plate 1, and the plurality of battery packs 3 are connected in series, the heat dissipation channel 11 includes an inlet channel 111, a plurality of branch channels 112, and an outlet channel 113, the plurality of branch channels 112 are distributed in parallel on the liquid-cooled heat exchange plate 1, one end of the inlet channel 111 is connected to the plurality of branch channels 112, one end of the outlet channel 113 is connected to the plurality of branch channels 112, and the other end of the inlet channel 111 is connected to the plurality of branch channels 112. There is a water inlet joint 13, and the other end of the liquid outlet channel 113 is connected to the water outlet joint 14. The heat dissipation device of the utility model utilizes the antifreeze coolant to flow into the liquid inlet channel 111 and then pass through multiple branch channels 112 in sequence before flowing out from the liquid outlet channel 113. It can cool down and dissipate heat for multiple battery packs 3 placed on the upper end of the liquid-cooled heat exchange plate 1. The multiple branch channels 112 are used to divert the flow respectively to improve the heat dissipation efficiency. Multiple branch channels 112 are distributed in parallel on the liquid-cooled heat exchange plate 1, which can evenly cool the battery pack 3, reduce the temperature difference of the battery pack 3, achieve the effect of equalizing the temperature of the battery pack 3, thereby improving the performance of the battery pack 3, extending the service life of the battery pack 3, and improving the working safety of the battery pack 3.

[0025] The utility model places the battery pack 3 on the upper end of the liquid-cooled heat exchange plate 1. When the heat dissipation device starts working, the antifreeze coolant flows into the liquid inlet channel 111 through the water inlet joint 13, passes through multiple branch channels 112 in sequence, and then flows out from the liquid outlet channel 113, so that the antifreeze coolant flows in the multiple branch channels 112 of the liquid-cooled heat exchange plate 1, which is convenient for liquid cooling and heat dissipation of the battery pack 3 placed on the upper end of the liquid-cooled heat exchange plate 1. The antifreeze coolant is respectively diverted through the multiple branch channels 112, so as to improve the uniformity and flow efficiency of the antifreeze coolant flow, which is beneficial to improving the heat dissipation efficiency of the battery pack 3 and ensuring the working stability of the battery pack 3.

[0026] When the utility model is implemented specifically, the water inlet joint 13 and the water outlet joint 14 are distributed in parallel, and the water inlet joint 13 and the water outlet joint 14 are distributed at both ends of the same side of the liquid-cooled heat exchange plate 1. The water inlet joint 13 of the liquid inlet channel 111 can be used to connect to the water outlet end of the circulating cooling system of the battery pack 3, and the water outlet joint 14 of the liquid outlet channel 113 is used to connect to the water inlet end of the circulating cooling system of the battery pack 3.

[0027] In specific implementation, the utility model can also apply an anti-condensation layer on the bottom of the liquid-cooled heat exchange plate 1 .

[0028] In the embodiment of the utility model, each branch flow channel 112 is in a coil structure, and the position above each branch flow channel 112 corresponds to a group of battery packs 3. Each branch flow channel 112 adopts a coil structure design, which can ensure that the antifreeze coolant has sufficient flow contact area from the liquid-cooled heat exchange plate 1 to the battery pack 3, thereby enhancing the cooling effect of the liquid-cooled heat exchange plate 1.

[0029] The utility model has a bare plate 6 fixed on the upper end of the liquid-cooled heat exchange plate 1. The liquid-cooled heat exchange plate 1 and the bare plate 6 are brazed and stamped into an integrated structure after being pressed tightly. The liquid-cooled heat exchange plate 1 and the bare plate 6 can be made of two 0-state aluminum plates that are pressed tightly and brazed and stamped into an integrated structure.

[0030] like Figure 3 As shown, in a specific implementation, in order to ensure the liquid cooling effect of the heat dissipation device, the utility model installs a layer of silicone pad 4 between the liquid cooling heat exchange plate 1 and the plurality of battery packs 3. The thickness of the silicone pad 4 is 1.5 mm. The silicone pad 4 can make the liquid cooling heat exchange plate 1 better in contact with the battery pack 3, better conduct heat, and improve the heat conduction effect of the liquid cooling heat exchange plate 1.

[0031] The heat dissipation device of the utility model includes two groups of limiting beams 5 and positioning fixings 51. The two groups of limiting beams 5 are symmetrically distributed. Each group of limiting beams 5 is provided with a plurality of spaced fixing holes. The positioning fixings 51 pass through the fixing holes of the two groups of limiting beams 5 to respectively install the two groups of limiting beams 5 on both sides of the liquid-cooled heat exchange plate 1. In specific implementation, the two groups of limiting beams 5 of the utility model are square tubes, and the positioning fixings 51 are bolts and nuts. The positioning fixings 51 use a fixing method in which the bolts and nuts cooperate to detachably install the two groups of limiting beams 5 on both sides of the liquid-cooled heat exchange plate 1; by setting two groups of limiting beams 5, a plurality of battery packs 3 can be limited to ensure the accuracy of the placement of the battery packs 3.

[0032] like Figure 4As shown, when the embodiment of the utility model is specifically implemented, the heat dissipation device includes a support seat 2, and the liquid-cooled heat exchange plate 1 is installed above the support seat 2. Among them, the support seat 2 includes a support frame 21, a plurality of transverse reinforcement tubes 22, and a plurality of longitudinal reinforcement tubes 23. A receiving groove 211 is provided in the middle of the support frame 21. A plurality of transverse reinforcement tubes 22 are distributed along the horizontal direction of the receiving groove 211 of the support frame 21, and a plurality of longitudinal reinforcement tubes 23 are distributed along the vertical direction of the receiving groove 211 of the support frame 21. A plurality of transverse reinforcement tubes 22 and a plurality of longitudinal reinforcement tubes 23 are cross-connected to form an integrated reinforcement structure. By setting the transverse reinforcement tubes 22, the longitudinal reinforcement tubes 23, and the support frame 21, the support strength of the liquid-cooled heat exchange plate 1 is improved, and the stability of the structure of the liquid-cooled heat exchange plate 1 is provided. A plurality of transverse reinforcement tubes 22, the longitudinal reinforcement tubes 23, and the support frame 21 can all be square tubes. A plurality of transverse reinforcement tubes 22 and a plurality of longitudinal reinforcement tubes 23 are fixed to the support frame 21 by welding, thereby ensuring the load-bearing strength and structural strength of the support seat 2.

[0033] The support frame 21 of the utility model includes a front frame 212, a rear frame 213, a left frame 214, and a right frame 215. The four sides of the liquid-cooled heat exchange plate 1 are respectively mounted on the upper ends of the front frame 212, the rear frame 213, the left frame 214, and the right frame 215. The support seat 2 includes a mounting member 24, which is respectively arranged on the front frame 212, the rear frame 213, the left frame 214, and the right frame 215 of the support frame 21. The four sides of the liquid-cooled heat exchange plate 1 are fixed to the front frame 212, the rear frame 213, the left frame 214, and the right frame 215 of the support frame 21 through the mounting member 24. In specific implementation, the mounting member 24 of the utility model can use a rivet nut to detachably fix the support frame 21 to the liquid-cooled heat exchange plate 1, so as to facilitate the assembly and disassembly between the support frame 21 and the liquid-cooled heat exchange plate 1 and to facilitate the replacement of the liquid-cooled heat exchange plate 1.

[0034] When the embodiment of the utility model is implemented, taking four battery packs 3 as an example, the specific situation of cooling the battery pack 3 by the heat dissipation device of the utility model is described in detail as follows:

[0035] Four battery packs 3 are connected in series and placed above the liquid-cooled heat exchange plate 1. Four branch flow channels 112 are provided inside the liquid-cooled heat exchange plate 1. Each branch flow channel 112 corresponds to a battery pack 3. Each battery pack 3 is provided with a plurality of battery core blocks. Each branch flow channel 112 of the utility model is designed in a coil-type structure. The position above each branch flow channel 112 corresponds to a battery pack 3. Each branch flow channel 112 adopts a coil-type structure design, which can ensure that the coolant has sufficient flow contact area from the liquid-cooled heat exchange plate 1 to the battery pack 3, thereby enhancing the cooling effect of the liquid-cooled heat exchange plate 1. The branch flow channel 112 of the coil-type structure has a return flow of the coolant, which can enhance the consistency of the temperature distribution of the battery core blocks in the same battery pack 3, improve the temperature equalization ability of the liquid-cooled heat exchange plate 1, reduce the temperature difference of the battery pack 3, solve the problem of uneven temperature of the battery pack 3, and improve the heat dissipation efficiency of the heat dissipation device.

[0036] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A heat dissipation device for cooling a battery pack, characterized in that: The heat dissipation device includes a liquid-cooled heat exchange plate and a heat dissipation channel located inside the liquid-cooled heat exchange plate. A plurality of battery packs are distributed on the upper end surface of the liquid-cooled heat exchange plate. The heat dissipation channel includes a liquid inlet channel, a plurality of branch channels, and a liquid outlet channel. The plurality of branch channels are distributed in parallel on the liquid-cooled heat exchange plate. One end of the liquid inlet channel is connected to the plurality of branch channels, one end of the liquid outlet channel is connected to the plurality of branch channels, the other end of the liquid inlet channel is connected to a water inlet joint, and the other end of the liquid outlet channel is connected to a water outlet joint.

2. The heat dissipation device for cooling a battery pack according to claim 1, characterized in that: A bare plate is fixed to the upper end of the liquid-cooled heat exchange plate.

3. The heat dissipation device for cooling a battery pack according to claim 2, characterized in that: The liquid-cooled heat exchange plate and the bare plate are pressed and brazed and punched into an integrated structure.

4. The heat dissipation device for cooling a battery pack according to claim 1, characterized in that: Each branch flow channel is in a coil structure, and the position above each branch flow channel corresponds to a group of battery groups.

5. The heat dissipation device for cooling a battery pack according to claim 1, characterized in that: The heat dissipation device includes two groups of limiting beams and positioning fixings. The two groups of limiting beams are symmetrically distributed. Each group of limiting beams is provided with a plurality of spaced fixing holes. The positioning fixings pass through the fixing holes of the two groups of limiting beams to respectively install the two groups of limiting beams on both sides of the liquid-cooled heat exchange plate.

6. The heat dissipation device for cooling a battery pack according to claim 1, characterized in that: The heat dissipation device comprises a support seat, and the liquid-cooled heat exchange plate is installed above the support seat.

7. The heat dissipation device for cooling a battery pack according to claim 6, characterized in that: The support seat includes a support frame, a plurality of transverse reinforcement tubes, and a plurality of longitudinal reinforcement tubes. A receiving groove is provided in the middle of the support frame. The plurality of transverse reinforcement tubes are distributed with spacing from each other along the horizontal direction of the receiving groove of the support frame, and the plurality of longitudinal reinforcement tubes are distributed with spacing from each other along the vertical direction of the receiving groove of the support frame. The plurality of transverse reinforcement tubes and the plurality of longitudinal reinforcement tubes are cross-connected to form an integrated reinforcement structure.

8. The heat dissipation device for cooling a battery pack according to claim 7, characterized in that: The support frame comprises a front frame, a rear frame, a left frame and a right frame, and the four sides of the liquid-cooled heat exchange plate are respectively mounted on the upper ends of the front frame, the rear frame, the left frame and the right frame.

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