Power battery cooling device of new energy automobile

Abstract

The invention discloses a power battery cooling device of a new energy automobile, which comprises a plurality of cooling flow channels for cooling a power battery, and the plurality of cooling flow channels are divided into a plurality of first cooling flow channels and a plurality of second cooling flow channels; the first cooling flow channels and the second cooling flow channels are arranged alternately, and the flowing direction of cooling liquid in the first cooling flow channels is opposite to the flowing direction of cooling liquid in the second cooling flow channels. According to the device, the cooling liquid has better heat dissipation performance, the overall cooling of the power battery is more uniform, and the service life of the power battery is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries for new energy vehicles, and in particular to a power battery cooling device for new energy vehicles. Background Art

[0002] As an energy storage device for new energy vehicles, power batteries will be repeatedly charged and discharged during the operation of the vehicle. During this process, the power batteries will generate heat. If the heat accumulates, it will cause thermal runaway of the battery. At present, the thermal management of power battery systems can be divided into four categories: natural cooling, air cooling, liquid cooling, and direct cooling. Among them, natural cooling is a passive thermal management method, while air cooling, liquid cooling, and direct cooling are active. The main difference between the three lies in the different heat exchange media.

[0003] A device in a liquid cooling mode, for example, an invention patent application with application publication number CN116053512A discloses a chain-shaped coolant flow channel structure of a proton exchange membrane fuel cell cooling plate, the chain-shaped coolant flow channel structure comprising a fuel cell, the fuel cell is assembled by stacking a plurality of single cells, the single cell is composed of a cooling plate 1, an anode plate, a cathode plate, a membrane electrode and a cooling plate 2; a plurality of evenly distributed chain-shaped single flow channels are provided at one end of the cooling plate 1 and the cooling plate 2 close to each other, and the plurality of chain-shaped single flow channels form a coolant flow channel structure; an inlet main flow channel and an outlet main flow channel are respectively provided on the cooling plate 1 and the cooling plate 2 and located on both sides of the plurality of chain-shaped single flow channels, the top inlet main flow channel and the outlet main flow channel are located on one side away from each other and are located on the cooling plate 1 and the cooling plate 2, and a flow channel inlet and a flow channel outlet are respectively provided, a plurality of the chain-shaped single flow channels are connected with the flow channel inlet through the inlet main flow channel, and a plurality of the chain-shaped single flow channels are connected with the flow channel outlet through the outlet main flow channel. This structure can improve the overall temperature uniformity of the battery and the efficiency of the coolant absorbing heat. However, the above chain-shaped coolant flow channel structure still has the following shortcomings:

[0004] When the chain-shaped coolant flow channel structure is working, the coolant enters the flow channel from the flow channel inlet, and is divided into each chain-shaped single flow channel through the inlet main flow channel. After absorbing heat, the coolant converges from each chain-shaped single flow channel to the outlet main flow channel, and then is discharged through the flow channel outlet. That is, the coolant flows uniformly from one end of the fuel cell to the other end of the fuel cell; the coolant first contacts the end of the fuel cell near the flow channel inlet. At this time, the coolant can absorb a large amount of fuel cell temperature, and the heat absorption is obvious. The coolant temperature rises, and the temperature of the fuel cell near the flow channel inlet drops rapidly. As the coolant flows toward the end of the fuel cell near the flow channel outlet, the coolant temperature continues to rise. The high-temperature coolant cannot better take away the temperature of the fuel cell behind, which will result in a good cooling effect at the end of the fuel cell near the flow channel inlet, and a poor cooling effect at the end of the fuel cell near the flow channel outlet, which in turn causes the temperature of the fuel cell near the flow channel inlet to be lower than the temperature of the fuel cell near the flow channel outlet, thereby causing uneven cooling of the fuel cell as a whole. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned problems and provide a power battery cooling device for new energy vehicles, which can make the coolant have better heat dissipation performance, the overall cooling of the power battery is more uniform, and the service life of the power battery is increased.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A power battery cooling device for a new energy vehicle comprises a plurality of cooling channels for cooling the power battery, wherein the plurality of cooling channels are divided into a plurality of first cooling channels and a plurality of second cooling channels; the first cooling channels and the second cooling channels are arranged alternately, and a flow direction of a coolant in the first cooling channels is opposite to a flow direction of a coolant in the second cooling channels.

[0008] The working principle of the power battery cooling device of the above-mentioned new energy vehicle is:

[0009] The flow direction of the coolant in the first cooling channel is opposite to the flow direction of the coolant in the second cooling channel, so that when cooling the power battery, the coolant is cooled from two directions, and the temperature at both ends of the power battery is more balanced. The first cooling channel and the second cooling channel are arranged alternately, so that the coolant has better heat dissipation performance, avoiding the temperature of the coolant at one end, further improving the uniformity of cooling, and cooling the power battery as a whole more evenly, thereby increasing the service life of the power battery.

[0010] In a preferred embodiment of the present invention, the power battery cooling device further comprises an adaptive adjustment module for adaptively adjusting the size of the cooling channel; the cooling channel is arranged on the adaptive adjustment module. By arranging the adaptive adjustment module, when a certain position on the power battery is seriously heated and the temperature is high, the diameter (or width) of the cooling channel corresponding to the position will automatically increase under the adjustment of the adaptive adjustment module, and the cooling channel can accommodate more coolant, which can speed up the cooling of the power battery at the position, and realize automatic cooling adjustment according to the temperature of the power battery.

[0011] Preferably, the adaptive adjustment module includes thermally conductive silicone, a rigid guide, a thermal expansion unit and an adjustment member; the number of the thermally conductive silicone is two, the two thermally conductive silicones are respectively located on both sides of the rigid guide member, and the cooling channel is arranged between the two thermally conductive silicones; the rigid guide member includes a horizontal plate and two vertical plates arranged at the lower end of the horizontal plate, and the thermal expansion unit is located between the two vertical plates; there are two adjustment members, and the two adjustment members are symmetrically arranged on both sides of the cooling channel; after the thermal expansion unit expands due to heat, it pushes the two adjustment members to move away from each other. In the above structure, when a certain position on the power battery generates severe heat and the temperature is high, the heat will be transferred to the adaptive adjustment module corresponding to the position. First, the heat of the power battery will be transferred to the rigid guide part, and then transferred to the thermally conductive silicone, the thermal expansion unit and the adjustment part through the rigid guide part. The heat of the thermally conductive silicone will also be transferred to the adjustment part. The thermal expansion unit and the adjustment part transfer the heat to the coolant in the cooling channel. The space enclosed by the two adjustment parts and the thermal expansion unit constitutes the cooling channel. The thermal expansion unit expands after being heated, and its volume changes, thereby pushing the two adjustment parts to move away from each other, and the thermally conductive silicone on both sides is deformed, which expands the caliber (or width) of the cooling channel. The cooling channel accommodates more coolant, and the heat of the adjustment part will also be transferred to the coolant. The heat of the thermal expansion unit will also be taken away by the coolant, and automatic cooling adjustment will be achieved according to the temperature of the power battery. After the temperature drops, the thermal expansion unit will shrink and its volume will decrease, and the thermally conductive silicone will reset, so that the adjustment part will also reset.

[0012] Preferably, the adaptive adjustment module includes thermally conductive silicone, a rigid guide, a thermal expansion unit and an adjustment member; the thermally conductive silicone is provided with a through cavity, the cooling channel is located at the lower end of the cavity (the lower end of the cavity constitutes the cooling channel), the rigid guide is located at the upper end of the cavity, the thermal expansion unit is arranged inside the rigid guide, there are two adjustment members, and the two adjustment members are symmetrically arranged on both sides of the cooling channel. After the thermal expansion unit expands due to heat, it pushes the two adjustment members to move away from each other. In the above structure, when a certain position on the power battery generates severe heat and the temperature is high, the heat will be transferred to the adaptive adjustment module corresponding to the position. First, the heat of the power battery will be transferred to the thermally conductive silicone, and part of the heat on the thermally conductive silicone will be transferred to the rigid guide, part to the adjustment part, and part directly to the coolant in the cooling channel; the heat of the rigid guide will be transferred to the thermal expansion unit, and the thermal expansion unit will expand after being heated, and its volume will change, thereby pushing the two adjustment parts to move away from each other, expanding the caliber (or width) of the cooling channel, and the cooling channel can accommodate more coolant. The heat of the adjustment part will also be transferred to the coolant and the thermal expansion unit, and the heat of the thermal expansion unit will also be taken away by the coolant, and automatic cooling adjustment will be achieved according to the temperature of the power battery; after the temperature drops, the thermal expansion unit will shrink and its volume will decrease, and the thermally conductive silicone will reset, so that the adjustment part will also reset.

[0013] Preferably, a conical opening is provided at the upper end between the two adjusting members, and a conical portion is provided at the lower end of the thermal expansion unit; the conical portion cooperates with the conical opening. When the thermal expansion unit expands after being heated, the conical portion will expand downward and to both sides, and the expansion of the conical portion will push the conical opening to open, thereby pushing the two adjusting members to move away from each other, thereby expanding the caliber of the cooling channel. When the temperature drops, the thermal expansion unit will shrink, the adjusting member will reset, and the cooling channel will return to its original size.

[0014] Preferably, each cooling channel is provided with a plurality of adaptive adjustment modules, and the plurality of adaptive adjustment modules are spliced ​​end to end. In the above structure, the spaces between the heat-conducting silica gels of the adaptive adjustment modules spliced ​​end to end are interconnected to form a cooling channel. The provision of a plurality of adaptive adjustment modules can dissipate heat more accurately. When a certain position on the power battery is seriously heated and the temperature is high, the adaptive adjustment module corresponding to the position will adaptively adjust the size of its internal cooling channel, thereby improving the heat dissipation effect of the power battery and ensuring the overall temperature balance of the power battery.

[0015] Preferably, the adaptive adjustment module further comprises a power transmission member, which is arranged between the adjustment member and the thermal expansion unit. When the thermal expansion unit expands after being heated, the volume of the thermal expansion unit changes, and under the guidance of the rigid guide member, the thermal expansion unit will expand downward, driving the power transmission member to move, and then pushing the two adjustment members to move away from each other, thereby changing the size of the cooling channel.

[0016] Preferably, the power battery cooling device also includes a mounting plate, on which a plurality of partition plates are arranged evenly along a straight line; the plurality of partition plates divide the interior of the mounting plate into a plurality of mounting slots, and the plurality of adaptive adjustment modules corresponding to each cooling channel are installed on the mounting slots. In the above structure, the mounting slots can play a role in positioning and installing the adaptive adjustment modules, and at the same time, make the structure of the power battery cooling device more compact. In addition, the partition plates and the mounting plate can further dissipate heat. The partition plates can transfer the heat of the thermally conductive silicone to the mounting plate, and the heat of the thermally conductive silicone can also be directly transferred to the mounting plate, so that heat dissipation is achieved through the mounting plate.

[0017] Preferably, the power battery cooling device further includes an inlet main channel and an outlet main channel; the inlet main channel is connected to the inlet of the first cooling channel and the inlet of the second cooling channel through an inlet branch channel; the outlet main channel is connected to the inlet of the first cooling channel and the inlet of the second cooling channel through an outlet branch channel. When the power battery starts working, the coolant enters the inlet branch channel from the inlet main channel, enters the corresponding cooling channel through the inlet branch channel, and the cooling channel takes away the heat. Finally, the coolant in the cooling channel flows from the outlet branch channel into the outlet main channel to discharge the coolant.

[0018] Preferably, the mounting disk is provided with a liquid inlet hole at a position corresponding to the inlet of the cooling channel, and the inlet branch channel is connected to the inlet of the cooling channel through the liquid inlet hole; the mounting disk is provided with a liquid outlet hole at a position corresponding to the outlet of the cooling channel, and the outlet branch channel is connected to the outlet of the cooling channel through the liquid outlet hole.

[0019] Preferably, the power battery cooling device further comprises a power battery and a battery mounting frame, both of which are arranged at the upper end of the mounting plate, and the power battery is fixed inside the battery mounting frame. The power battery is located at the upper end of the mounting plate, and the power battery can be in direct contact with the rigid guide member. When working, the heat of the power battery can be transferred to the rigid guide member, and finally cooled by the coolant to achieve cooling of the power battery; the battery mounting frame can play a role in installing and fixing the power battery.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the power battery cooling device of the present invention, the flow direction of the coolant in the first cooling channel is opposite to the flow direction of the coolant in the second cooling channel, so that when cooling the power battery, the coolant is cooled from two directions, the temperature at both ends of the power battery is more balanced, and the heat dissipation effect is improved.

[0022] 2. In the power battery cooling device of the present invention, the first cooling channel and the second cooling channel are arranged alternately, so that the coolant has better heat dissipation performance, avoids the temperature of the coolant from gathering at one end, further improves the uniformity of cooling, and makes the overall cooling of the power battery more uniform, thereby increasing the service life of the power battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a schematic diagram of the structure of a cooling channel of a power battery cooling device for a new energy vehicle.

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of a power battery cooling device for a new energy vehicle in the present invention.

[0025] Figure 3 The present invention is a schematic diagram of the three-dimensional structure of a power battery cooling device for a new energy vehicle, in which a power battery and a battery mounting frame are hidden.

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the first specific implementation mode of all the adaptive adjustment modules in the present invention.

[0027] Figure 5 It is a cross-sectional view of the adaptive adjustment module in the mounting plate of the present invention.

[0028] Figure 6 for Figure 5 A partial enlarged view of point A in the middle.

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the adaptive adjustment module in the present invention.

[0030] Figure 8 It is a side view of the adaptive adjustment module in the present invention.

[0031] Fig. 9 It is a schematic diagram of the three-dimensional structure of the adaptive adjustment module in the present invention in another viewing direction.

[0032] Fig.10 It is a schematic diagram of the three-dimensional structure of the installation disk in the present invention.

[0033] Fig.11 It is a schematic diagram of the three-dimensional structure of the second specific implementation mode of the adaptive adjustment module in the present invention.

[0034] Fig.12 It is a side view of a second specific implementation manner of the adaptive adjustment module in the present invention.

[0035] Fig.13 It is a side view of a third specific implementation manner of the adaptive adjustment module in the present invention. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0037] Example 1

[0038] See also Figure 1 This embodiment discloses a power battery cooling device for a new energy vehicle, comprising a plurality of cooling channels 1 for cooling a power battery 14, wherein the plurality of cooling channels 1 are divided into a plurality of first cooling channels 1-1 and a plurality of second cooling channels 1-2; the first cooling channels 1-1 and the second cooling channels 1-2 are arranged alternately, and the flow direction of the coolant in the first cooling channels 1-1 is opposite to the flow direction of the coolant in the second cooling channels 1-2, Figure 1 The arrow direction is the coolant flow direction.

[0039] See also Figure 1 and Figure 2 , the working principle of the power battery cooling device of the above-mentioned new energy vehicle is:

[0040] The flow direction of the coolant in the first cooling channel 1-1 is opposite to the flow direction of the coolant in the second cooling channel 1-2, so that when cooling the power battery 14, the coolant is cooled from two directions, and the temperature at both ends of the power battery 14 is more balanced. The first cooling channel 1-1 and the second cooling channel 1-2 are arranged alternately, so that the coolant has better heat dissipation performance, avoids the temperature of the coolant from gathering at one end, further improves the uniformity of cooling, and cools the power battery 14 more evenly as a whole, thereby increasing the service life of the power battery 14.

[0041] See also Figure 2-Figure 9 The power battery cooling device further includes an adaptive adjustment module 2 for adaptively adjusting the size of the cooling channel 1; the cooling channel 1 is arranged on the adaptive adjustment module 2. By arranging the adaptive adjustment module 2, when a certain position on the power battery 14 is seriously heated and the temperature is high, the cooling channel 1 corresponding to the position will automatically increase the diameter (or width) of the cooling channel 1 under the adjustment of the adaptive adjustment module 2, and the cooling channel 1 can accommodate more coolant, which can speed up the cooling of the position of the power battery 14, and realize automatic cooling adjustment according to the temperature of the power battery 14.

[0042] See also Figure 2-Figure 9 The adaptive adjustment module 2 includes a thermally conductive silicone 2-1, a rigid guide 2-2, a thermal expansion unit 2-3 and an adjustment member 2-4; the number of the thermally conductive silicone 2-1 is two, and the two thermally conductive silicones 2-1 are respectively located on both sides of the rigid guide 2-2, specifically located below the horizontal plate 2-21, and the cooling channel 1 is arranged between the two thermally conductive silicones 2-1; the rigid guide 2-2 includes a horizontal plate 2-21 and two vertical plates 2-22 arranged at the lower end of the horizontal plate 2-21, and the thermal expansion unit 2-3 is located between the two vertical plates 2-22; there are two adjustment members 2-4, and the two adjustment members 2-4 are symmetrically arranged on both sides of the cooling channel 1; after the thermal expansion unit 2-3 expands due to heat, it pushes the two adjustment members 2-4 to move away from each other. In the above structure, when a certain position on the power battery 14 is heated seriously and the temperature is high, the heat will be transferred to the adaptive adjustment module 2 corresponding to the position. First, the heat of the power battery 14 will be transferred to the rigid guide 2-2, and then transferred to the heat-conducting silica gel 2-1, the thermal expansion unit 2-3 and the adjustment member 2-4 through the rigid guide 2-2. The heat of the heat-conducting silica gel 2-1 will also be transferred to the adjustment member 2-4. The thermal expansion unit 2-3 and the adjustment member 2-4 transfer the heat to the coolant in the cooling channel 1. The space enclosed by the two adjustment members 2-4 and the thermal expansion unit 2-3 constitutes the cooling channel 1. The heat of the thermal expansion unit 2-3 will also be taken away by the coolant, and automatic cooling and adjustment will be achieved according to the temperature of the power battery 14; when the temperature drops, the thermal expansion unit 2-3 will shrink and its volume will decrease, and the thermal conductive silicone 2-1 will be reset, so that the adjusting part 2-4 will also be reset.

[0043] See also Figure 2-Figure 9 The upper end between the two adjusting members 2-4 is provided with a conical opening 3, and the lower end of the thermal expansion unit 2-3 is provided with a conical portion 4; the conical portion 4 cooperates with the conical opening 3. When the thermal expansion unit 2-3 expands after being heated, the conical portion 4 will expand downward and to both sides, and the expansion of the conical portion 4 will push the conical opening 3 to open, thereby pushing the two adjusting members 2-4 to move away from each other, and the thermal conductive silicone 2-1 will deform, expanding the diameter of the cooling channel 1. When the temperature drops, the thermal expansion unit 2-3 will shrink, the adjusting member 2-4 will reset, and the cooling channel 1 will return to its original size.

[0044] See also Figure 2-Figure 9, each cooling channel 1 is provided with a plurality of adaptive adjustment modules 2, and the plurality of adaptive adjustment modules 2 are spliced ​​end to end. In the above structure, the spaces between the thermal conductive silica gel 2-1 of the front and rear adaptive adjustment modules 2 are interconnected to form a cooling channel 1. The provision of a plurality of adaptive adjustment modules 2 can dissipate heat more accurately. When a certain position on the power battery 14 is seriously heated and the temperature is high, the adaptive adjustment module 2 corresponding to the position will adaptively adjust the size of the cooling channel 1 inside it, thereby improving the heat dissipation effect of the power battery 14 and ensuring the overall temperature balance of the power battery 14.

[0045] See also Figure 2-Figure 9 The two adjacent thermal conductive silicone rubbers 2-1 and the rigid guide member 2-2 can be bonded by glue to ensure the sealing of the connection.

[0046] See also Figure 2-Figure 9 The rigid guide member 2-2 is not easily deformed by heat and has a stable structure. The thermal expansion unit 2-3 is a metal with a high thermal expansion coefficient, such as aluminum or cadmium.

[0047] See also Figure 2-Figure 10 The power battery cooling device also includes a mounting plate 5, on which a plurality of partition plates 6 are arranged evenly along a straight line; the plurality of partition plates 6 divide the interior of the mounting plate 5 into a plurality of mounting grooves 7, and the plurality of adaptive adjustment modules 2 corresponding to each cooling channel 1 are mounted on the mounting grooves 7. In the above structure, the mounting grooves 7 can play a role in positioning and mounting the adaptive adjustment modules 2, and at the same time, the structure of the power battery cooling device becomes more compact. In addition, the partition plates 6 and the mounting plate 5 can further dissipate heat. The partition plates 6 can transfer the heat of the thermally conductive silica gel 2-1 to the mounting plate 5, and the heat of the thermally conductive silica gel 2-1 can also be directly transferred to the mounting plate 5, so that heat dissipation is achieved through the mounting plate 5.

[0048] See also Figure 2-Figure 10 The thermally conductive silicone 2-1 is tightly attached to the side wall of the mounting groove 7 to improve the stability of the installation and the heat dissipation effect. The space enclosed by the two adjusting members 2-4, the thermal expansion unit 2-3 and the bottom of the mounting groove 7 constitutes the cooling channel 1. The thermally conductive silicone 2-1 can also play a sealing role to prevent the coolant from leaking. The adjusting member 2-4 is a 7-shaped adjusting member, and the upper end of the 7-shaped adjusting member is provided with an inclined portion, and the inclined portions of the two adjusting members 2-4 form a conical opening 3.

[0049] See also Figure 2-Figure 10 , four adaptive adjustment modules 2 are arranged on each mounting groove 7 , that is, one cooling channel 1 corresponds to four adaptive adjustment modules 2 .

[0050] See also Figure 1-Figure 10The power battery cooling device further includes an inlet main channel 8 and an outlet main channel 9; the inlet main channel 8 is connected to the inlet of the first cooling channel 1-1 and the inlet of the second cooling channel 1-2 through an inlet branch channel 10; the outlet main channel 9 is connected to the inlet of the first cooling channel 1-1 and the inlet of the second cooling channel 1-2 through an outlet branch channel 11. When the power battery 14 starts to work, the coolant enters the inlet branch channel 10 from the inlet main channel 8, and enters the corresponding cooling channel 1 through the inlet branch channel 10. The cooling channel 1 will take away the heat, and finally the coolant in the cooling channel 1 will flow from the outlet branch channel 11 into the outlet main channel 9 to discharge the coolant.

[0051] See also Figure 1-Figure 10 The mounting disk 5 is provided with a liquid inlet hole 12 at a position corresponding to the inlet of the cooling channel 1, and the inlet branch channel 10 is connected with the inlet of the cooling channel 1 (the first cooling channel 1-1 and the second cooling channel 1-2) through the liquid inlet hole 12; the mounting disk 5 is provided with a liquid outlet hole 13 at a position corresponding to the outlet of the cooling channel 1, and the outlet branch channel 11 is connected with the outlet of the cooling channel 1 (the first cooling channel 1-1 and the second cooling channel 1-2) through the liquid outlet hole 13.

[0052] See also Figure 1-Figure 10 The power battery cooling device further includes a power battery 14 and a battery mounting frame 15, both of which are arranged at the upper end of the mounting plate 5, and the power battery 14 is fixed inside the battery mounting frame 15. The power battery 14 is located at the upper end of the mounting plate 5, and the power battery 14 can be in direct contact with the thermal conductive silica gel 2-1. When working, the heat of the power battery 14 can be transferred to the thermal conductive silica gel 2-1 to achieve cooling of the power battery 14; the battery mounting frame 15 can play a role in installing and fixing the power battery 14.

[0053] See also Figure 1-Figure 10 , the number of cooling channels 1 is 13, the number of first cooling channels 1-1 is 7, and the number of second cooling channels 1-2 is 6. The first cooling channels 1-1 and the second cooling channels 1-2 are arranged alternately, that is, the first cooling channel 1-1 is located between two second cooling channels 1-2, and the second cooling channel 1-2 is located between two first cooling channels 1-1. Correspondingly, the number of mounting grooves 7 is also 14, and the number of partition plates 6 is 12.

[0054] Example 2

[0055] See also Figure 2-Figure 3 and Figure 11-Figure 12The adaptive adjustment module 2 includes a thermally conductive silicone rubber 2-1, a rigid guide 2-2, a thermal expansion unit 2-3 and an adjustment member 2-4; the thermally conductive silicone rubber 2-1 is provided with a through cavity (also referred to as a through hole, the inner wall of the through hole is the thermally conductive silicone rubber 2-1), the cooling channel 1 is located at the lower end of the cavity (the lower end of the cavity constitutes the cooling channel 1), the rigid guide 2-2 is located at the upper end of the cavity, the thermal expansion unit 2-3 is arranged inside the rigid guide 2-2, there are two adjustment members 2-4, and the two adjustment members 2-4 are symmetrically arranged on both sides of the cooling channel 1. After the thermal expansion unit 2-3 is heated and expanded, it pushes the two adjustment members 2-4 to move away from each other. In the above structure, when a certain position on the power battery 14 generates heat seriously and the temperature is high, the heat will be transferred to the adaptive adjustment module 2 corresponding to the position. First, the heat of the power battery 14 will be transferred to the thermal conductive silicone 2-1, part of the heat on the thermal conductive silicone 2-1 will be transferred to the rigid guide 2-2, part of it will be transferred to the adjustment member 2-4, and part of it will be directly transferred to the coolant in the cooling channel 1; the heat of the rigid guide 2-2 will be transferred to the thermal expansion unit 2-3, and the thermal expansion unit 2-3 will expand after being heated, and the volume will change, thereby pushing the two adjustment members 2-4 to move away from each other, expanding the caliber (or width) of the cooling channel 1, and the cooling channel 1 will accommodate more coolant. The heat of the adjustment member 2-4 will also be transferred to the coolant and the thermal expansion unit 2-3, and the heat of the thermal expansion unit 2-3 will also be taken away by the coolant, and automatic cooling adjustment will be realized according to the temperature of the power battery 14; after the temperature drops, the thermal expansion unit 2-3 will shrink and the volume will decrease, and the thermal conductive silicone 2-1 will reset, so that the adjustment member 2-4 will also reset.

[0056] See also Figure 2-Figure 3 and Figure 11-Figure 12 The power battery 14 is located at the upper end of the mounting plate 5, and the power battery 14 can be in direct contact with the thermally conductive silicone 2-1. During operation, the heat of the power battery 14 can be transferred to the thermally conductive silicone 2-1, and finally cooled by the coolant to achieve cooling of the power battery 14; the battery mounting frame 15 can play a role in installing and fixing the power battery 14.

[0057] See also Figure 2-Figure 3 and Figure 11-Figure 12 The rigid guide 2-2 is an n-shaped guide. The rigid guide 2-2 is not easily deformed when heated and has a stable structure. The n-shaped guide can prevent the thermal expansion unit 2-3 from deforming laterally at the part in contact with the n-shaped guide after being heated, and guide the thermal expansion unit 2-3 to deform downward, so that the tapered portion 4 moves downward and expands, pushing the two adjusting members 2-4 to move. The adjusting member 2-4 is a 7-shaped adjusting member, and an inclined portion is provided at the upper end of the 7-shaped adjusting member. The inclined portions of the two adjusting members 2-4 form a tapered opening 3.

[0058] See also Figure 2-Figure 3 and Figure 11-Figure 12 The two adjacent thermal conductive silicone rubbers 2-1 can be bonded together by glue to ensure the sealing of the connection.

[0059] See also Figure 2-Figure 3 and Figure 11-Figure 12 The lower ends of the cavities between the heat-conducting silica gel 2 - 1 of the adaptive adjustment modules 2 spliced ​​end to end are connected to form a cooling channel 1 .

[0060] Example 3

[0061] See also Figure 2 and Fig.13 , the other structures in this embodiment are the same as those in embodiment 1 or embodiment 2, except that the adaptive adjustment module 2 further includes a power transmission member 2-5, the power transmission member 2-5 is arranged between the adjustment member 2-4 and the thermal expansion unit 2-3, a tapered portion is arranged at the lower part of the power transmission member 2-5, the cross section of the thermal expansion unit 2-3 is rectangular, and the tapered portion cooperates with the tapered opening 3. When the thermal expansion unit 2-3 expands after being heated, the volume of the thermal expansion unit 2-3 changes, and under the guidance of the rigid guide member 2-2, the thermal expansion unit 2-3 will expand downward, driving the power transmission member 2-5 to move, and then pushing the two adjustment members 2-4 to move away from each other, thereby changing the size of the cooling channel 1.

[0062] The thermal expansion unit 2-3 may be solid or liquid.

[0063] Example 4

[0064] The other structures in this embodiment are the same as those in Embodiment 2, except that there is a gap between the thermally conductive silicone 2-1 and the partition. The purpose is that when the size of the cooling channel 1 is adaptively adjusted, the two adjusting parts 2-4 move away from each other, which will push the thermally conductive silicone 2-1 outward, causing the thermally conductive silicone 2-1 to deform. By setting the gap, the thermally conductive silicone 2-1 has space to adapt to the deformation, thereby ensuring smooth adjustment of the cooling channel 1.

[0065] The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A power battery cooling device for a new energy vehicle, characterized in that: It includes multiple cooling channels for cooling the power battery, and the multiple cooling channels are divided into a plurality of first cooling channels and a plurality of second cooling channels; the first cooling channels and the second cooling channels are arranged alternately, and the flow direction of the coolant in the first cooling channels is opposite to the flow direction of the coolant in the second cooling channels.

2. The power battery cooling device according to claim 1, characterized in that: The power battery cooling device also includes an adaptive adjustment module for adaptively adjusting the size of the cooling channel; the cooling channel is arranged on the adaptive adjustment module.

3. The power battery cooling device according to claim 2, characterized in that: The adaptive adjustment module includes thermally conductive silicone, a rigid guide, a thermal expansion unit and an adjustment member; the number of the thermally conductive silicone is two, the two thermally conductive silicones are respectively located on both sides of the rigid guide, and the cooling channel is arranged between the two thermally conductive silicones; the rigid guide includes a horizontal plate and two vertical plates arranged at the lower end of the horizontal plate, and the thermal expansion unit is located between the two vertical plates; there are two adjustment members, and the two adjustment members are symmetrically arranged on both sides of the cooling channel; after the thermal expansion unit expands due to heat, it pushes the two adjustment members to move away from each other.

4. The power battery cooling device according to claim 2, characterized in that: The adaptive adjustment module includes a thermally conductive silicone rubber, a rigid guide, a thermal expansion unit and an adjustment member; the thermally conductive silicone rubber is provided with a through cavity, the cooling channel is located at the lower end of the cavity, the rigid guide member is located at the upper end of the cavity, the thermal expansion unit is arranged inside the rigid guide member, there are two adjustment members, and the two adjustment members are symmetrically arranged on both sides of the cooling channel. After the thermal expansion unit expands due to heat, it pushes the two adjustment members to move away from each other.

5. The power battery cooling device according to claim 3 or 4, characterized in that: A conical opening is arranged at the upper end between the two adjusting members, and a conical portion is arranged at the lower end of the thermal expansion unit; the conical portion and the conical opening are matched with each other.

6. The power battery cooling device according to claim 2, 3 or 4, characterized in that: Each cooling channel is provided with a plurality of self-adaptive adjustment modules, and the plurality of self-adaptive adjustment modules are connected end to end.

7. The power battery cooling device according to claim 3 or 4, characterized in that: The adaptive adjustment module further comprises a power transmission member, which is arranged between the adjustment member and the thermal expansion unit.

8. The power battery cooling device according to claim 6, characterized in that: The power battery cooling device also includes a mounting plate, on which a plurality of partition plates are provided, and the plurality of partition plates are evenly arranged along a straight line; the plurality of partition plates divide the interior of the mounting plate into a plurality of mounting slots, and the plurality of adaptive adjustment modules corresponding to each cooling channel are mounted on the mounting slots.

9. The power battery cooling device according to claim 1, characterized in that: The power battery cooling device also includes an inlet main channel and an outlet main channel; the inlet main channel is connected to the inlet of the first cooling channel and the inlet of the second cooling channel through an inlet branch channel; the outlet main channel is connected to the inlet of the first cooling channel and the inlet of the second cooling channel through an outlet branch channel.

10. The power battery cooling device according to claim 8, characterized in that: The power battery cooling device also includes a power battery and a battery mounting frame. The battery mounting frame and the battery mounting frame are both arranged at the upper end of the mounting plate, and the power battery is fixed inside the battery mounting frame.

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