Liquid cooling heat dissipation structure and heat dissipation method of automobile battery

Abstract

The invention relates to the field of heat dissipation of automobile batteries, and discloses a liquid cooling heat dissipation structure of automobile batteries, comprising a battery box and a battery cell, wherein the battery box comprises a box body, a box cover and a box bottom, wherein the upper opening and the lower opening of the box body are both provided with built-in steps, wherein the two built-in steps are respectively connected to the opening ends of the box cover and the box bottom, wherein a heat conducting plate is provided between the two built-in steps, wherein the heat conducting plate divides the box body into an outer area and an inner area which are not connected to each other, wherein a surface array of the heat conducting plate is provided with a plurality of outer fins located in the outer area and a plurality of inner fins located in the inner area, wherein a battery bottom plate is provided in the built-in steps located below, wherein a battery jacket is provided on the upper end surface of the battery bottom plate, wherein a battery top plate is provided at the upper opening of the battery jacket, wherein the battery cell is provided between the battery bottom plate and the battery top plate, wherein a slide plate and a driving source for driving the slide plate to reciprocate in a vertical direction are installed in the box bottom, wherein a side surface of the slide plate is connected to an inner wall of the box bottom via a diaphragm.

Description

Technical Field

[0001] The present invention relates to the field of automobile batteries, in particular to the field of automobile battery heat dissipation, and in particular to a liquid cooling heat dissipation structure and a heat dissipation method of an automobile battery. Background Art

[0002] During the charging and discharging process, automobile batteries tend to generate a lot of heat, causing the internal temperature of the battery pack to rise. Overheating can easily cause problems with the battery cells in the battery pack, which can cause damage at the very least, or even catch fire or explode. Therefore, the heat dissipation structure is one of the important factors affecting the safe use of the battery pack.

[0003] In the prior art, automotive batteries usually use air cooling or liquid cooling or a combination of the two to dissipate heat, but the air cooling effect is poor, and more rely on liquid cooling. In the existing liquid cooling technology, liquid cooling pipes are generally arranged inside the automotive battery, which occupies too much space inside the battery pack, and the pipeline layout is complicated. Moreover, the heat dissipation conduction is achieved by relying on liquid cooling pipes, and the heat dissipation effect is relatively poor. Based on this, the applicant has found some prior arts through searching, and now introduces them one by one:

[0004] The Chinese utility model patent with authorization announcement number CN220209084U discloses an immersion liquid-cooled battery pack, in which an insulating coolant is filled in a battery box, and a liquid inlet and a liquid outlet are provided on the side wall of the battery box for the insulating coolant to enter and exit. The insulating coolant enters the heat exchanger and returns to the battery box through the liquid inlet and the liquid outlet, and the coolant is dissipated by the heat exchanger, so that the battery cells in the battery pack are immersed in an insulating coolant in a low-temperature state. The temperature of the battery pack can be quickly reduced by this immersion heat dissipation. However, it still has some shortcomings: the number of battery cells in the automotive battery is very large and the distribution is relatively dense. When the coolant is dissipated by the heat exchanger, the battery cells hinder the flow of the coolant, and it is difficult to make the coolant in various parts of the battery box simultaneously participate in the heat dissipation of the heat exchanger. Therefore, the temperature distribution of the coolant in the battery box is uneven and needs to be improved.

[0005] The Chinese invention patent with application publication number CN115411405A discloses a lithium battery energy storage system, which also adopts immersion heat dissipation. The connection between the refrigeration unit and the liquid storage box PACK battery box is achieved through a liquid inlet pipe, a liquid return pipe and a liquid storage pipe. The coolant is introduced into the refrigeration unit for heat dissipation and refrigeration and then introduced back to the battery box. There is also a problem that it is difficult to make the coolant in each part of the battery box participate in the heat dissipation and refrigeration of the refrigeration unit synchronously, and the temperature distribution of the coolant in the battery box is uneven.

[0006] Based on the above, the present invention proposes a liquid cooling heat dissipation structure and heat dissipation method for an automobile battery. Summary of the invention

[0007] In order to solve the problems mentioned in the above background, the present invention provides a liquid cooling heat dissipation structure and heat dissipation method for an automobile battery.

[0008] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows.

[0009] A liquid cooling heat dissipation structure for automobile batteries, comprising a battery pack, the battery pack comprising a battery box and a plurality of battery cells arranged in the battery box, the battery box comprising a box body, a box cover and a box bottom, the upper opening and the lower opening of the box body are both provided with built-in steps facing inward, the opening end of the box cover is connected to the built-in step located above, and the opening end of the box bottom is connected to the built-in step located below;

[0010] A heat conductor is arranged in the box, and the heat conductor includes a heat conducting plate arranged between two built-in steps, and the heat conducting plate divides the box into an outer area and an inner area which are not connected to each other, and a surface array of the heat conducting plate is provided with a plurality of outer fins located in the outer area and a plurality of inner fins located in the inner area;

[0011] The inner surface of the built-in step at the bottom is provided with a horizontally arranged battery bottom plate, the upper end surface of the battery bottom plate is provided with a battery jacket, and the upper opening of the battery jacket is provided with a battery top plate, the battery bottom plate and the battery top plate are both in the shape of hollow plates, and the battery monomer is provided between the battery bottom plate and the battery top plate;

[0012] A horizontally arranged slide plate and a driving source for driving the slide plate to reciprocate in a vertical direction are installed in the bottom of the box, and the side surface of the slide plate is connected to the inner wall of the bottom of the box through a diaphragm.

[0013] Furthermore, the diaphragm is made of rubber or silicone material and has a reserve corresponding to the reciprocating motion of the slide plate.

[0014] Furthermore, a one-way hole located outside the battery jacket is provided through the end surface of the battery base plate. There are four one-way holes and they are respectively located on the outside of the four sides of the battery jacket. A one-way valve is provided in the one-way hole. The area between the heat conduction plate and the battery jacket is named the side area, and the area between the battery base plate and the slide plate is named the bottom area. The one-way valve is used to make the insulating coolant in the side area flow unidirectionally toward the bottom area.

[0015] Furthermore, the portion of the battery base plate located outside the battery casing is in a solid plate state, the one-way hole is arranged on the solid plate portion of the battery base plate, the one-way valve includes a convex sleeve arranged at the lower opening of the one-way hole, the lower opening of the convex sleeve is connected to the open end of the bottom of the box, and a notch and an elastic sheet are arranged on the side of the convex sleeve facing the vertical center line of the box body, the upper end of the elastic sheet is connected to the convex sleeve and the connection is located above the notch, and the lower end of the elastic sheet is located below the notch. Initially, the elastic sheet blocks the notch.

[0016] Furthermore, initially, the liquid level of the insulating coolant in the battery jacket is flush with the lower end surface of the battery top plate.

[0017] Furthermore, the outer fins are arranged horizontally, and a plurality of outer fins are distributed in an array along the vertical direction.

[0018] Furthermore, the battery top plate is in the shape of a table with a rectangular horizontal cross section, and the horizontal cross-sectional area of ​​the battery top plate decreases from bottom to top.

[0019] Furthermore, a nozzle is respectively arranged on two side surfaces of the box body along the length direction, the outer area is connected to the nozzle, the two nozzles are respectively an air inlet nozzle and an air outlet nozzle, and an air guide component is arranged at the air inlet nozzle.

[0020] Furthermore, the air guide member includes an air guide shell, the open end of the air guide shell is located directly in front of the closed end along the straight-line driving direction of the vehicle, the open end of the air guide shell is located outside the vehicle, and the closed end is provided with an air guide nozzle, which is connected to the air inlet nozzle;

[0021] A partition is arranged in the air guide shell at an angle. The lowest point of the partition is connected to the bottom of the open end of the air guide shell, and the highest point extends into the air guide nozzle. The area of ​​the air guide shell below the partition is named the active zone. The air guide nozzle and the active zone are connected through a connecting port. Wind holes are arranged on the side of the active zone, and a fan is arranged in the active zone.

[0022] A heat dissipation method of a liquid cooling heat dissipation structure of an automobile battery:

[0023] Step 1: The driving source drives the slide plate to move up in the vertical direction. During the upward movement, the slide plate can push the coolant in the bottom area and the immersion area to move upward to the top area, and finally flow to the surroundings and into the side area. The increase of coolant in the side area means that the force on the elastic sheet becomes larger and larger than the critical value. Therefore, the elastic sheet will undergo elastic deformation, the notch will be opened, and the coolant near the bottom of the side area will flow into the bottom area;

[0024] Step 2: The driving source drives the slide plate to move downward in the vertical direction. During the downward movement, the coolant in the bottom area and the immersion area moves downward. Since the upper end surface of the battery top plate is in an inclined shape, a part of the coolant will still flow into the side area along the inclined surface, and the coolant near the bottom of the side area will flow into the bottom area;

[0025] Step 3: Repeat steps 1 and 2 to achieve that the coolant near the liquid surface in the traction immersion zone with a higher temperature flows unidirectionally into the side zone to wait for heat dissipation and cooling, the coolant near the bottom in the side zone with a lower temperature flows unidirectionally into the bottom zone, and the coolant with a lower temperature in the bottom zone flows unidirectionally into the immersion zone from below;

[0026] At the same time, the air is guided by the air guide component, enters the outer area from the air inlet, and leaves from the air outlet, taking away the heat of the outer fins, and dissipating the heat of the coolant entering the side area, so that the temperature is reduced before entering the bottom area.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] In this solution, each time the slide plate completes a reciprocating motion, the coolant near the liquid surface in the immersion zone can flow into the side zone, and the coolant near the bottom in the side zone can flow into the bottom zone. This can be repeated to achieve the traction of the coolant near the liquid surface in the immersion zone with a higher temperature to flow unidirectionally into the side zone to wait for heat dissipation and cooling, and the coolant near the bottom in the side zone with a lower temperature flows unidirectionally to the bottom zone, and the coolant with a lower temperature in the bottom zone flows unidirectionally into the immersion zone from below. Therefore, this solution can achieve immersion heat dissipation of the battery monomer, and during the heat dissipation process:

[0029] 1. The insulating coolant flows in one direction due to the push of the slide plate. The overall size of the slide plate is close to the size of the battery bottom plate on which the battery cells are installed, and is located below the battery cells. Therefore, when the insulating coolant flows in one direction, the coolant at the same level in the immersion area is pushed out at the same time and participates in the one-way flow synchronously. There is no dead angle problem, which solves the problem of "battery cells hindering the flow of coolant, making it difficult for all parts of the coolant in the battery box to participate in the heat dissipation of the heat exchanger, and the temperature distribution of the coolant in the battery box is uneven";

[0030] 2. During each reciprocating motion of the slide plate, the coolant in the immersion zone is pushed up first, and a part of it flows to the side zone, and the other part returns to the immersion zone when the slide plate moves down. Since the battery top plate is in the shape of a rectangular table with a horizontal cross-section, the horizontal cross-sectional area of ​​the battery top plate decreases from bottom to top. Therefore, the upper end surface of the battery top plate is composed of four inclined surfaces, which can guide the coolant returning to the immersion zone when the slide plate moves down, so that part of it returns to the immersion zone and part of it is guided to the side zone. That is, each reciprocating motion of the slide plate can draw more coolant to participate in the unidirectional flow, thereby increasing the unidirectional flow speed of the coolant and further enhancing the heat dissipation effect;

[0031] 3. In this solution, the outer fins surround the outer periphery of the heat conducting plate, which is equivalent to setting a circle of outer fins on the outer surface of the original battery box. This layout method, on the one hand, improves the space utilization rate, and there is no need to reserve an additional space for the heat exchanger. On the other hand, it can conduct heat out in time to prevent the heat generated by the battery from spreading and affecting the rest of the structure inside the car;

[0032] 4. When the car is driving, the air guide component guides the outside air to quickly pass through the outer area, taking away the heat on the outer fins and reducing the energy consumption of heat dissipation. When the car is parked for charging, the fan draws the air through the outer area to take away the heat on the outer fins. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the present invention;

[0034] Figure 2 is a schematic diagram of a battery pack;

[0035] Figure 3 A cross-sectional view of a battery pack Figure 1 ;

[0036] Figure 4 A cross-sectional view of a battery pack Figure 2 ;

[0037] Figure 5 A partial diagram of a battery pack Figure 1 ;

[0038] Figure 6 A partial diagram of a battery pack Figure 2 ;

[0039] Figure 7 This is a schematic diagram of the box and the battery bottom plate from an upward perspective;

[0040] Figure 8 is a schematic diagram of a heat conductor;

[0041] Fig. 9 is a partial cross-sectional view of a battery pack;

[0042] Fig.10 is a schematic diagram of a driving source;

[0043] Fig.11 is a schematic diagram of an air guide component;

[0044] Fig.12 This is a cross-sectional view of the air guide shell.

[0045] The reference numerals in the accompanying drawings are:

[0046] 100, battery box; 101, air inlet; 102, air outlet; 103, box body; 104, box cover; 105, box bottom; 106, one-way hole; 107, convex sleeve; 108, convex plate; 109, elastic sheet; 110, battery bottom plate; 111, battery jacket; 112, battery top plate; 113, slide plate; 114, diaphragm; 115, heat conduction plate; 116, inner fin; 117, outer fin; 200, battery cell; 300, driving source; 301, driving assembly; 302, hydraulic assembly; 400, air guide component; 401, air guide shell; 402, partition; 403, air guide nozzle; 404, fan. DETAILED DESCRIPTION

[0047] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0048] Embodiment 1

[0049] Reference Figure 1-Figure 12 A liquid cooling heat dissipation structure of a car battery includes a battery pack, wherein the battery pack includes a battery box 100 and a plurality of battery cells 200 arranged in the battery box 100.

[0050] Reference Figure 2 and Figure 3 The battery box 100 includes a box body 103, and the upper opening and the lower opening of the box body 103 are both provided with built-in steps facing inward, a box cover 104 is provided at the open opening of the upper built-in step, and a box bottom 105 is provided at the open opening of the lower built-in step. The box cover 104 and the box bottom 105 are both closed at one end and open at the other end and connected to the built-in step.

[0051] Two side surfaces of the box body 103 along the length direction are respectively provided with a nozzle, and the two nozzles are an air inlet nozzle 101 and an air outlet nozzle 102 respectively.

[0052] Reference Figure 4 and Figure 8 A heat conductor is disposed in the box 103, and the heat conductor includes a heat conducting plate 115 disposed between two built-in steps. The heat conducting plate 115 divides the box 103 into two areas that are not connected to each other: an outer area and an inner area.

[0053] The outer area is connected to the nozzle, and air can enter the outer area from the air inlet nozzle 101 and leave from the air outlet nozzle 102. The outer surface array of the heat conducting plate 115 is provided with a plurality of outer fins 117. When the air flows in the outer area, it can take away the heat of the outer fins 117. Furthermore, the outer fins 117 are arranged horizontally and the array direction is vertical to prevent the outer fins 117 from hindering the flow of air in the outer area.

[0054] The inner surface of the heat conducting plate 115 is also provided with a plurality of inner fins 116 in an array.

[0055] An insulating coolant, such as silicone oil, is present in the inner zone.

[0056] Reference Figure 3 , Figure 5 , Figure 6 , Figure 7 and Fig. 9 The inner surface of the built-in step below is provided with a battery bottom plate 110 which is horizontally arranged and in the shape of a hollow plate.

[0057] The upper end surface of the battery bottom plate 110 is provided with a battery jacket 111 made of a heat insulating material. It should be noted that in this solution, the box body 103 is rectangular in shape, so the heat conducting plate 115 and the battery jacket 111 are annular in shape with a rectangular horizontal cross section.

[0058] A battery top plate 112 is provided at the upper opening of the battery jacket 111. The battery top plate 112 is in the shape of a table with a rectangular horizontal cross-section. At the same time, the horizontal cross-sectional area of ​​the battery top plate 112 decreases from bottom to top. The battery bottom plate 110 and the battery top plate 112 are both in the shape of hollow plates or are both provided with through holes for the flow of coolant. The battery cell 200 is arranged between the battery bottom plate 110 and the battery top plate 112. Since there is coolant in the inner area, the battery cell 200 is immersed in the coolant, and the heat dissipation effect is better. It should be noted that there is a gap between two adjacent battery cells 200, so that there is coolant around the battery cells 200.

[0059] Reference Figure 3 and Fig. 9 A one-way hole 106 is provided through the end surface of the battery bottom plate 110. Furthermore, the one-way hole 106 is located outside the battery jacket 111. Since the horizontal cross-section of the battery jacket 111 is rectangular, four one-way holes 106 are provided and the length directions of the openings of the four one-way holes 106 are respectively parallel to the four sides of the battery jacket 111.

[0060] A convex sleeve 107 extends from the lower opening of the one-way hole 106, and the lower opening of the convex sleeve 107 is connected to the open end of the box bottom 105. The open end of the box bottom 105 is also provided with a convex plate 108 facing upward. Similarly, the convex plate 108 is in the shape of a hollow plate, and is in the shape of a ring with a rectangular horizontal cross-section. The convex plate 108 is located on the side of the convex sleeve 107 facing the vertical center line of the box body 103, and the upper end of the convex plate 108 is connected to the lower end surface of the battery bottom plate 110.

[0061] In addition, the portion of the battery bottom plate 110 located on the side of the convex plate 108 away from the vertical center line of the box body 103 is in a solid plate state, and the portion of the battery bottom plate 110 located outside the battery jacket 111 is also in a solid plate state.

[0062] The side of the convex sleeve 107 facing the convex plate 108 is provided with a notch and an elastic sheet 109, wherein the elastic sheet 109 is elastic, the upper end is connected to the convex sleeve 107 and the connection is located above the notch, and the lower end is located below the notch, so that initially, the elastic sheet 109 can block the notch to Fig. 9 Taking the perspective of as an example, initially, the left side of the elastic sheet 109 is subjected to a force, and the force is unable to cause elastic deformation of the elastic sheet 109, which is named the critical value. When the force from the left side of the elastic sheet 109 is greater than the critical value, the elastic sheet 109 deflects to the right and the notch is opened. When the force on the left side is less than or equal to the critical value, the notch is closed, acting as a one-way valve, allowing the coolant on the left to flow unidirectionally to the right through the notch.

[0063] Reference Figure 3 and Fig. 9 A horizontally arranged skateboard 113 and a driving source 300 for driving the skateboard 113 to reciprocate in the vertical direction are installed in the box bottom 105. Diaphragms 114 are arranged between the four sides of the skateboard 113 and the four inner walls of the box bottom 105. The diaphragm 114 is made of rubber or silicone material, so the areas on the upper and lower sides of the skateboard 113 are not connected to each other. It should be noted that it is easy for technicians in this field to think of installing a piston in the box bottom 105 to replace the skateboard 113 and the diaphragm 114. However, the piston frequently reciprocates, and the sealing is easily affected, resulting in leakage of the coolant. The diaphragm 114 itself is preset with a margin. Therefore, when the skateboard 113 frequently reciprocates, the diaphragm 114 is difficult to be damaged, and the sealing is not easily affected, that is, the sealing is better.

[0064] Working principle of the present invention:

[0065] The outer area and the inner area are not connected to each other, so there is no insulating coolant in the outer area, and there is insulating coolant in the inner area. It should be noted that the inner area not only refers to the area of ​​the box body 103 separated by the heat conducting plate 115, but also includes the area of ​​the box cover 104 and the box bottom 105 located above the slide plate 113. Initially, the liquid level of the coolant is flush with the lower end surface of the battery top plate 112;

[0066] For the convenience of description, the inner area is divided again: the area between the heat conducting plate 115 and the battery jacket 111 is named as the side area, the area between the battery bottom plate 110, the slide plate 113 and the convex plate 108 is named as the bottom area, the area inside the battery jacket 111 is named as the soaking area, and the area between the battery top plate 112 and the box cover 104 is named as the top area;

[0067] The heat dissipation process of the battery pack is specifically manifested as follows:

[0068] The temperature of the coolant near the battery cell 200 is higher, and the temperature of the coolant far from the battery cell 200 is lower;

[0069] The driving source 300 drives the slide plate 113 to perform a reciprocating motion in the vertical direction, first moving up and then moving down, wherein:

[0070] During the upward movement, the slide plate 113 can push the coolant in the bottom area and the immersion area upward to the top area, and finally flow to the surroundings and flow into the side area. The increase of coolant in the side area means that the force on the elastic sheet 109 becomes larger and larger than the critical value. Therefore, the elastic sheet 109 undergoes elastic deformation, the notch is opened, and the coolant near the bottom in the side area flows into the bottom area.

[0071] During the downward movement, the coolant in the bottom area and the immersion area moves downward. Since the upper end surface of the battery top plate 112 is in an inclined shape, a portion of the coolant will still flow into the side area along the inclined surface, and the coolant near the bottom of the side area will flow into the bottom area.

[0072] It should be noted that once the force applied by the side area to the elastic sheet 109 is equal to or less than the critical value, the elastic deformation of the elastic sheet 109 is restored and the gap is closed;

[0073] In summary, although the coolant level will move downward when the slide plate 113 moves downward, and the coolant in the top area returns to the immersion area, generally speaking, each time the slide plate 113 completes a reciprocating motion, the coolant near the liquid surface in the immersion area can flow into the side area, and the coolant near the bottom in the side area flows into the bottom area, and so on and so forth, so that the coolant near the liquid surface in the immersion area with a higher temperature can flow unidirectionally into the side area to wait for heat dissipation and cooling, and the coolant near the bottom in the side area with a lower temperature can flow unidirectionally to the bottom area, and the coolant with a lower temperature in the bottom area can flow unidirectionally into the immersion area from below, so this solution can realize immersion heat dissipation of the battery cell 200, and during the heat dissipation process:

[0074] 1. The insulating coolant flows in one direction due to the push of the slide plate 113. The overall size of the slide plate 113 is close to the size of the battery bottom plate 110 on which the battery cell 200 is installed, and is located below the battery cell 200. Therefore, when the insulating coolant flows in one direction, the coolant at the same level in the immersion area is pushed out at the same time and participates in the one-way flow synchronously. There is no dead angle problem, which solves the problem of "battery cells hindering the flow of coolant, making it difficult for all parts of the coolant in the battery box to participate in the heat dissipation of the heat exchanger, and the temperature distribution of the coolant in the battery box is uneven";

[0075] 2. During each reciprocating motion of the slide plate 113, the coolant in the immersion zone is first pushed up, a part of it flows to the side zone, and the other part returns to the immersion zone when the slide plate 113 moves downward. Since the battery top plate 112 is in the shape of a table with a rectangular horizontal cross-section, the horizontal cross-sectional area of ​​the battery top plate 112 decreases from bottom to top. Therefore, the upper end surface of the battery top plate 112 is composed of four inclined surfaces, which can guide the coolant returning to the immersion zone when the slide plate 113 moves downward, so that part of it returns to the immersion zone and part of it is guided to the side zone, that is, each reciprocating motion of the slide plate 113 can draw more coolant to participate in the unidirectional flow, thereby increasing the unidirectional flow speed of the coolant and further enhancing the heat dissipation effect.

[0076] In addition, while the coolant flows unidirectionally, the air is guided by the air guide component 400, enters the outer area from the air inlet nozzle 101, and leaves from the air outlet nozzle 102, taking away the heat of the outer fins 117, dissipating the heat of the coolant entering the side area, lowering its temperature before entering the bottom area.

[0077] Further, see Fig.10 Since the inner area is a closed area, when the slide plate 113 moves upward, the overall volume of the inner area decreases, which causes the air in the top area to be compressed. Of course, initially, the top area may be in a negative pressure state, or even close to a vacuum state, but the air content cannot be zero. Therefore, a certain force is required to drive the slide plate 113 to move upward. Therefore, in order to make the slide plate 113 move upward more smoothly, the driving source 300 can be hydraulic. Specifically, the driving source 300 includes a driving component 301 and a hydraulic component 302, wherein the driving component 301 includes a mounting shell with a vertical axis, and the mounting shell is provided with a plurality of hydraulic components. A piston is sleeved in the mounting shell, a piston rod extends from the upper end of the piston, the piston rod is connected to the bottom of the slide plate 113, an interface is provided at the bottom of the mounting shell, the hydraulic assembly 302 includes a cylinder shell, a cylinder plug is provided in the cylinder shell, the cylinder plug is driven by a hydraulic rod or an electric telescopic rod, and moves in the cylinder shell, and the cylinder shell and the interface are connected by a connecting pipe; by driving the cylinder plug to move, the hydraulic medium is injected into the mounting shell, the piston moves upward, thereby driving the slide plate 113 upward, conversely, the cylinder plug moves in the opposite direction, the hydraulic medium in the mounting shell is drawn back into the cylinder shell, the piston moves downward, thereby driving the slide plate 113 downward.

[0078] Embodiment 2

[0079] Reference Fig.11 and Fig.12 , and also includes an air guiding component 400, which is used to allow air to enter the outer area from the air inlet nozzle 101 and leave from the air outlet nozzle 102.

[0080] Specifically, the air guide component 400 includes an air guide shell 401, one end of which is open and the other end is closed, wherein the open end is located directly in front of the closed end along the straight-line driving direction of the car, and the open end is located outside the car, and the closed end is provided with an air guide nozzle 403, and the air guide nozzle 403 is connected to the air inlet nozzle 101 through pipeline technology. In this solution, the air guide nozzle 403 is directly connected to the air inlet nozzle 101, and the pipeline technology is not shown. According to the layout of the car and the reserved space, as long as the open end is outside the car, when the car is driving, the outside air can enter the air inlet nozzle 101 through the open end and the air guide nozzle 403.

[0081] A partition 402 is also provided in the air guide shell 401. The partition 402 is arranged at an angle. The lowest point of the partition 402 is connected to the bottom of the open end of the air guide shell 401, and the highest point extends into the air guide nozzle 403. The area of ​​the air guide shell 401 located below the partition 402 is named the active zone. A connecting port for connecting the air guide nozzle 403 with the active zone is also provided in the air guide shell 401. Wind holes are provided on the side of the active zone, and a fan 404 is provided in the active zone. When the car battery is charging, the car stops. At this time, the fan 404 is started, so that the air is guided by the partition 402 and enters the air inlet nozzle 101 through the air guide nozzle 403 to dissipate heat to the outer fins 117 in the outer zone.

[0082] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A liquid cooling heat dissipation structure for automobile batteries, comprising a battery pack, wherein the battery pack comprises a battery box (100) and a plurality of battery cells (200) arranged in the battery box (100), characterized in that: The battery box (100) comprises a box body (103), a box cover (104) and a box bottom (105); the upper opening and the lower opening of the box body (103) are both provided with built-in steps facing inward; the opening end of the box cover (104) is connected to the built-in step located above, and the opening end of the box bottom (105) is connected to the built-in step located below; A heat conductor is arranged in the box body (103), the heat conductor comprising a heat conducting plate (115) arranged between two built-in steps, the heat conducting plate (115) divides the box body (103) into an outer area and an inner area which are not connected to each other, and a surface array of the heat conducting plate (115) is provided with a plurality of outer fins (117) located in the outer area and a plurality of inner fins (116) located in the inner area; A horizontally arranged battery bottom plate (110) is provided on the inner surface of the built-in step located at the bottom, a battery jacket (111) is provided on the upper end surface of the battery bottom plate (110), a battery top plate (112) is provided at the upper opening of the battery jacket (111), the battery bottom plate (110) and the battery top plate (112) are both in the shape of hollow plates, and the battery monomer (200) is provided between the battery bottom plate (110) and the battery top plate (112); A horizontally arranged slide plate (113) and a driving source (300) for driving the slide plate (113) to reciprocate in a vertical direction are installed in the box bottom (105); a side surface of the slide plate (113) is connected to an inner wall of the box bottom (105) via a diaphragm (114); The end surface of the battery bottom plate (110) is penetrated by a one-way hole (106) located outside the battery outer shell (111), four one-way holes (106) are provided and are respectively located outside the four side surfaces of the battery outer shell (111), a one-way valve is provided in the one-way hole (106), the area between the heat conducting plate (115) and the battery outer shell (111) is named as the side area, and the area between the battery bottom plate (110) and the slide plate (113) is named as the bottom area, and the one-way valve is used to make the insulating coolant in the side area flow toward the bottom area in one direction; Initially, the liquid level of the insulating coolant in the battery jacket (111) is flush with the lower end surface of the battery top plate (112); The battery top plate (112) is in the shape of a table with a rectangular horizontal cross section, and the horizontal cross section area of ​​the battery top plate (112) decreases from bottom to top; A nozzle is respectively arranged on two side surfaces of the box body (103) along the length direction, the outer area is connected to the nozzle, the two nozzles are respectively an air inlet nozzle (101) and an air outlet nozzle (102), and an air guide component (400) is arranged at the air inlet nozzle (101); The air guide component (400) comprises an air guide shell (401), the open end of the air guide shell (401) is located directly in front of the closed end along the straight-line driving direction of the automobile, the open end of the air guide shell (401) is located outside the automobile, and the closed end is provided with an air guide nozzle (403), and the air guide nozzle (403) is connected to the air inlet nozzle (101); A partition (402) is arranged inside the air guide shell (401), and the partition (402) is arranged in an inclined manner. The lowest point of the partition (402) is connected to the bottom of the open end of the air guide shell (401), and the highest point extends into the air guide nozzle (403). The area of ​​the air guide shell (401) located below the partition (402) is named as the active area. The air guide nozzle (403) and the active area are connected through a connecting port. Wind holes are arranged on the side of the active area, and a fan (404) is arranged in the active area.

2. A liquid cooling and heat dissipation structure for a car battery according to claim 1, characterized in that: The diaphragm (114) is made of rubber or silicone material and has a reserve corresponding to the reciprocating motion of the slide plate (113).

3. The liquid cooling heat dissipation structure of a car battery according to claim 1, characterized in that: The portion of the battery bottom plate (110) located outside the battery jacket (111) is in a solid plate state, the one-way hole (106) is arranged on the solid plate portion of the battery bottom plate (110), the one-way valve comprises a convex sleeve (107) arranged at the lower opening of the one-way hole (106), the lower opening of the convex sleeve (107) is connected to the open end of the box bottom (105), the side of the convex sleeve (107) facing the vertical center line of the box body (103) is provided with a notch and an elastic sheet (109), the upper end of the elastic sheet (109) is connected to the convex sleeve (107) and the connection is located above the notch, the lower end of the elastic sheet (109) is located below the notch, and initially, the elastic sheet (109) blocks the notch.

4. The liquid cooling heat dissipation structure of a car battery according to claim 1, characterized in that: The outer fins (117) are arranged horizontally, and a plurality of the outer fins (117) are distributed in an array along the vertical direction.

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