Automobile battery with heat dissipation device

Abstract

The present application relates to an automobile battery with a heat dissipation device, and relates to the technical field of automobile batteries. The automobile battery includes a battery body and a heat dissipation mechanism. The heat dissipation mechanism includes: a cooling box, which is filled with coolant; a protective box, which is used to protect the battery body; a heat-conducting component, which is in contact with the battery body, and the heat-conducting component extends downward through the cooling box into the coolant and extends upward to the top of the protective box; a cooling box, which has a cooling chamber and a cooling hole inside, and the heat-conducting component extends upward through the cooling hole to the top of the cooling box; a plurality of connecting pipes, which are used to connect the cooling box and the cooling chamber and allow the coolant to evaporate and move into the cooling chamber; an air-cooling component, which is used to air-cool the heat-conducting component and the cooling box. The present application protects the battery body by placing it in a protective box, and cools the battery body by water cooling and air cooling at the same time. The air cooling can also cool the coolant, thereby greatly improving the heat dissipation effect of the battery.

Description

Technical Field

[0001] The present application relates to the technical field of automobile batteries, and in particular to an automobile battery with a heat dissipation device. Background Art

[0002] With the rapid development of new energy vehicles, new energy batteries are also widely used. As a car driven by electricity, the battery is a very important component of the new energy vehicle and the source of driving force for the new energy vehicle. However, after a long time of driving, the battery of the new energy vehicle tends to generate a lot of heat. If the battery is not cooled and dissipated in time, it will have a great impact on the use of the new energy battery.

[0003] In existing cooling solutions, water cooling is often used for heat dissipation. However, as the battery is cooled, the coolant temperature will also increase, thereby reducing the heat dissipation effect on the battery and shortening the battery life. Summary of the invention

[0004] In order to increase the life of the battery, the present application provides a car battery with a heat dissipation device.

[0005] The present application provides an automobile battery with a heat dissipation device, which adopts the following technical solution:

[0006] An automobile battery with a heat dissipation device comprises a battery body and a heat dissipation mechanism for dissipating heat from the battery body, wherein the heat dissipation mechanism comprises:

[0007] a cooling box, containing coolant;

[0008] A protection box is arranged on the cooling box and allows the battery body to be placed therein for protection;

[0009] A heat-conducting component is arranged on the protection box and contacts the battery body, and the heat-conducting component extends downward through the cooling box into the coolant and extends upward to above the protection box;

[0010] A cooling box is arranged on the top of the protection box and has a cooling cavity and a cooling hole inside, and the heat conducting component extends upward through the cooling hole to the top of the cooling box;

[0011] A plurality of connecting pipes are used to connect the cooling box and the cooling chamber so that the cooling liquid evaporates and moves into the cooling chamber and condenses into liquid to flow back into the cooling box;

[0012] The air cooling component is used to cool the heat conducting component and the cooling box.

[0013] By adopting the above technical solution, the battery body is placed in a protective box for protection, which improves the life of the battery. At the same time, the heat-conducting component is in contact with the battery body. The heat-conducting component can directly export the heat of the battery to the coolant for cooling, and the air-cooling component can also dissipate the heat of the heat-conducting component. Therefore, the battery body is cooled and cooled by water cooling and air cooling at the same time, and the air cooling can also cool the coolant, thereby greatly improving the heat dissipation effect of the battery.

[0014] When the coolant temperature rises and evaporates, it enters the cooling chamber. The coolant in the cooling box can also be cooled during the evaporation process. At the same time, the air cooling component can cool the cooling box. In addition, the heat conducting component can also conduct heat from the coolant, so that the coolant in the cooling chamber condenses into liquid and then flows back into the cooling box, thereby cooling the coolant, further improving the heat dissipation effect on the battery and increasing the battery life.

[0015] At the same time, the cooling box is located below the protective box, so the heat conductive component extends downward through the cooling box into the coolant, thereby reducing the risk of liquid leakage from the gap between the heat conductive component and the cooling box. In addition, the heat conductive component is in contact with the battery body and can directly dissipate heat, further realizing the heat dissipation effect and increasing the life of the battery.

[0016] Optionally, the heat conduction component includes:

[0017] A wrapping member, wrapped around the battery body and made of a metal material;

[0018] Multiple heat sink fins 1 and 2 are respectively arranged on the upper and lower surfaces of the package. The heat sink fins 1 pass upward through the protection box and the cooling hole and extend above the cooling box. The heat sink fins 2 pass downward through the protection box and the upper surface of the cooling box and are immersed in the coolant.

[0019] By adopting the above technical solution, the package can better export the heat of the battery body, and the heat is also conducted to the coolant through multiple heat dissipation fins 2 to achieve cooling and heat dissipation. After the coolant evaporates, it moves upward to the cooling chamber for cooling; at the same time, the heat is dissipated into the air through multiple heat dissipation fins 1, and the heat of the coolant evaporated in the cooling chamber is also dissipated through multiple heat dissipation fins 1. The air cooling component is started to make the multiple heat dissipation fins 1 dissipate faster, and the evaporated coolant condenses and flows back into the cooling box, thereby greatly improving the heat dissipation effect on the battery and increasing the battery life.

[0020] Optionally, the cooling box is provided with a connecting assembly connected to the heat sink fin 2, the connecting assembly includes a connecting plate made of metal material and a plurality of connecting fins, the plurality of connecting fins are arranged on the connecting plate and pass through the cooling box and are immersed in coolant, and when the protective box is installed on the cooling box, the connecting plate is pushed against the upper surface of the cooling box for positioning and the heat sink fin 2 is plugged and installed on the connecting plate for positioning.

[0021] By adopting the above technical solution, multiple connecting fins are passed through the cooling box and immersed in the coolant, the connecting piece is against the cooling box, and after the protection box is fixedly installed on the cooling box, it can be pressed against the connecting piece for positioning. The pressing of the connecting piece against the cooling box can further improve the sealing effect and further reduce the risk of coolant leakage. At the same time, when multiple heat dissipating fins are plugged into the connecting piece and installed on the connecting piece, the position of the protection box can also be positioned, thereby greatly improving the convenience of fixing the protection box on the cooling box.

[0022] Optionally, a sealing ring is provided on the connecting piece and is pressed against the cooling box for sealing.

[0023] By adopting the above technical solution, the sealing effect is further improved and the risk of coolant leakage is reduced.

[0024] Optionally, the protective box includes a fixed box and a sealing box detachably arranged on the fixed box, two wrapping pieces are provided and are located inside the fixed box and the sealing box, the two wrapping pieces are abutted against each other and are used to wrap the battery body, and the heat dissipation fins 1 and 2 are respectively provided on the two wrapping pieces and are respectively slidably arranged on the sealing box and the fixed box.

[0025] By adopting the above technical solution, the sealing box is removed from the fixed box, and the two wrapping parts are moved away from each other when the sealing box is moved and removed. Then the battery body can be removed for replacement, and the wrapping part and heat sink fin 1 or the wrapping part and heat sink fin 2 can also be removed for replacement. After the replacement is completed, the sealing box is fixedly installed on the fixed box and the two wrapping parts are abutted against each other, thereby realizing the replacement of the battery body. At the same time, the heat conductive component can also be replaced, which improves the heat dissipation effect of the heat conductive component and increases the life of the battery.

[0026] At the same time, the two packages can conduct heat when they are against each other. Therefore, when there is a temperature difference between heat sink fin 1 and heat sink fin 2, they can conduct heat to each other, so that multiple heat sink fins 1 and multiple heat sink fins 2 form a whole to dissipate heat, thereby further improving the heat dissipation effect of the thermal conductive component and increasing the life of the battery.

[0027] Optionally, the air cooling component includes:

[0028] Fan, used for blowing air for cooling;

[0029] A retractable cover is arranged at the air outlet of the fan and is in an inwardly retracted shape;

[0030] The guide pipe is arranged on the shrink cover and has a pipe opening at one end away from the fan, which can cover the air outlet end of the second heat dissipation fin and the cooling box.

[0031] By adopting the above technical solution, the fan starts to inhale air so that the gas enters the shrink hood, and the shrink hood can increase the air pressure. The pressurized gas is then blown to the heat sink fins 2 and the cooling box through the guide pipe for cooling, thereby cooling the heat sink fins 2 and the cooling box.

[0032] Optionally, the air flow direction blown out from the air outlet is parallel to the length direction of the second heat sink fin, and the cooling box is provided with a plurality of ventilation slots penetrating the cooling box along the length direction of the second heat sink fin.

[0033] By adopting the above technical solution, the length direction of the second heat sink fin is parallel to the gas flow direction, which greatly reduces the resistance encountered when the gas moves and speeds up the gas flow. At the same time, the gas can move through the ventilation slots, greatly improving the heat dissipation effect of the gas on the cooling box and the second heat sink fin, thereby increasing the battery life.

[0034] Optionally, the protection box is provided with a support block pressed against the connecting plate, the support block forms a cooling space for air to pass between two adjacent heat dissipation fins, and the shrink cover is provided with a guide component for guiding the gas to the cooling space.

[0035] By adopting the above technical solution, after the fan is started, the guiding component guides the gas into the cooling space, and then the gas moves out through the cooling space. The flow of gas can accelerate the dissipation of heat on the heat dissipation fins and the connecting plate, further improving the heat dissipation effect on the battery and increasing the battery life.

[0036] Optionally, the guiding component includes:

[0037] A guide pipe is arranged on the shrink cover and extends to the cooling space;

[0038] The guide end is arranged on the guide pipe and the pipe mouth can cover a plurality of cooling spaces and allow the gas to dissipate heat through the plurality of cooling spaces.

[0039] By adopting the above technical solution, the gas in the shrink cover is ejected through the guide tube and the guide section, so that the gas passes through the heat sink fin 1 and the ventilation slot, thereby cooling the heat sink fin 1 and the cooling box, thereby improving the life of the battery.

[0040] Optionally, the fan is provided with an air ducting hood for guiding air to enter.

[0041] By adopting the above technical solution, the setting of the air hood makes it easier for outside air to enter the fan, especially when the vehicle moves forward, the movement of the vehicle causes the gas to enter the air hood, and the air hood introduces the gas into the fan, thereby further increasing the air output of the fan and increasing the life of the battery.

[0042] In summary, the present application includes at least one of the following beneficial technical effects:

[0043] 1. The battery body is placed in a protective box for protection, and the battery body is cooled by water cooling and air cooling at the same time. Air cooling can also cool the coolant, thereby greatly improving the heat dissipation effect of the battery.

[0044] 2. The coolant is cooled by the coolant, and the air cooling component can cool the cooling box at the same time. In addition, the heat conducting component can also conduct the heat in the coolant, so that the coolant in the cooling chamber condenses into liquid and then flows back into the cooling box, thereby cooling the coolant, further improving the heat dissipation effect of the battery and increasing the battery life.

[0045] 3. The cooling box is located below the protective box, so the heat-conducting component passes downward through the cooling box and extends into the coolant, thereby reducing the risk of liquid leakage from the gap between the heat-conducting component and the cooling box. In addition, the heat-conducting component can directly conduct heat when in contact with the battery body, further embodying the heat dissipation effect and increasing the life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the structure of a car battery;

[0047] Figure 2 yes Figure 1 Schematic diagram of the cross section of AA;

[0048] Figure 3 yes Figure 2 The enlarged schematic diagram of the middle part B;

[0049] Figure 4 yes Figure 2 The enlarged schematic diagram of the middle C part;

[0050] Figure 5 It is a schematic diagram of the structure of the air cooling component and the guide component in the automobile battery.

[0051] Figure numerals: 1. battery body; 2. heat dissipation mechanism; 21. cooling box; 22. cooling box; 23. connecting pipe; 24. mounting hole; 25. ventilation slot; 26. cooling hole; 27. cooling chamber; 3. protection box; 31. fixing box; 32. blocking box; 33. support block; 34. cooling space; 4. heat conduction component; 41. wrapping piece; 42. heat dissipation fin one; 43. heat dissipation fin two; 5. connecting component; 51. connecting piece; 52. connecting fin; 53. connecting slot; 6. air cooling component; 61. fan; 62. shrinkage cover; 63. guide pipe; 64. air outlet; 65. induced draft cover; 7. guide component; 71. guide pipe; 72. guide end. DETAILED DESCRIPTION

[0052] The present application is described in further detail below.

[0053] The embodiment of the present application discloses a car battery with a heat dissipation device.

[0054] Reference Figure 1 and Figure 2 The automobile battery with a heat dissipation device includes a battery body 1 and a heat dissipation mechanism 2 for dissipating heat from the battery body 1 .

[0055] The heat dissipation mechanism 2 includes a cooling box 21, a protective box 3, and a heat-conducting component 4. The cooling box 21 is filled with coolant and is used to be fixedly installed on the car. The cooling box 21 is in the shape of a rectangular parallelepiped and has a mounting hole 24 on its upper surface along its length direction; the protective box 3 is fixedly installed on the upper surface of the cooling box 21 by screws. The protective box 3 includes a fixed box 31 and a sealing box 32 fixedly installed on the upper surface of the fixed box 31 by screws. The fixed box 31 and the sealing box 32 have the same shape and size. The top of the fixed box 31 and the bottom of the sealing box 32 are both in an open state. The sealing box 32 is buckled on the upper surface of the fixed box 31 and the two are fixed by screws. A sealing strip is clamped and installed on the upper surface of the fixed box 31 to press against the sealing box 32 for sealing.

[0056] The bottom of the fixed box 31 is fixedly installed on the upper surface of the cooling box 21 by screws, and the battery body 1 is placed in the fixed box 31 and the sealing box 32 for protection; the heat conductive component 4 includes a wrapping piece 41, a plurality of heat dissipation fins 1 42 and a plurality of heat dissipation fins 2 43, and two wrapping pieces 41 are provided and are respectively located in the fixed box 31 and the sealing box 32. When the fixed box 31 and the sealing box 32 are fixedly connected, the two wrapping pieces 41 abut against each other and are used to wrap the battery body 1, so that the battery body 1 is located in the two wrapping pieces 41. The wrapping pieces 41 are made of thin plates of metal material, so the two wrapping pieces 41 abut against the outer wall of the battery body 1 and can maximize the contact area with the battery body 1. The wrapping pieces 41 can realize the heat dissipation of the battery body 1 faster, and at the same time can further improve the protection effect of the battery body 1, thereby increasing the life of the battery.

[0057] The length directions of the plurality of heat sink fins 42 and the plurality of heat sink fins 43 are parallel to the length directions of the cooling box 21 and the protection box 3. The plurality of heat sink fins 42 are vertically arranged upward and the plurality of heat sink fins 43 are vertically arranged downward and are respectively and integrally arranged on the upper and lower surfaces of the two wrapping members 41. The wrapping member 41, the heat sink fins 42 and the heat sink fins 43 are made of the same metal material, and the material is preferably copper. The heat sink fins 42 vertically upward pass through the sealing box 32 to extend above the sealing box 32, and the heat sink fins 43 vertically downward pass through the fixed box 31 to extend below the fixed box 31.

[0058] Reference Figure 1-Figure 3 The cooling box 21 is provided with a connecting assembly 5 connected to the heat dissipation fins 2 43, and the connecting assembly 5 includes a connecting piece 51 and a plurality of connecting fins 52 made of metal material, and the materials of both are preferably copper; the connecting piece 51 is against the upper surface of the cooling box 21, and the plurality of connecting fins 52 are integrally arranged on the lower surface of the connecting piece 51 and vertically downwardly pass through the plurality of mounting holes 24 to extend into the cooling box 21, and at the same time, the plurality of connecting fins 52 extend into the coolant to achieve heat dissipation and cooling; a plurality of connecting grooves 53 are spaced apart on the upper surface of the connecting piece 51, and after the fixed box 31 is fixedly installed on the cooling box 21, the plurality of heat dissipation fins 2 43 are vertically inserted and installed on the plurality of connecting grooves 53 downwardly for positioning, so that the heat on the heat dissipation fins 2 43 can be conducted to the coolant through the connecting piece 51 and the plurality of connecting fins 52 for heat dissipation, and at the same time, the connecting piece 51 can block the plurality of mounting holes 24, thereby reducing the risk of coolant leakage from the mounting holes 24 and causing damage to the battery or the car.

[0059] Two support blocks 33 are fixedly installed on the lower surface of the fixed box 31. The length directions of the support blocks 33 and the heat dissipation fins 43 are parallel, and the two support blocks 33 are spaced apart in a direction perpendicular to the length direction of the heat dissipation fins 43. At the same time, the two support blocks 33 are pressed against the connecting piece 51 for positioning, so that the lower surface of the fixed box 31, the connecting piece 51, the support blocks 33 and the multiple heat dissipation fins 43 cooperate to form a plurality of cooling spaces 34 for air to pass through.

[0060] Reference Figure 1 , Figure 2 and Figure 4 The heat dissipation mechanism 2 also includes a cooling box 22, a plurality of connecting pipes 23 and an air cooling component 6. The cooling box 22 is fixedly mounted on the upper surface of the sealing box 32, and the length directions of the cooling box 22 and the heat dissipation fins 42 are parallel. A cooling chamber 27 is provided in the cooling box 22, and a plurality of cooling holes 26 vertically penetrating the upper and lower surfaces of the cooling box 22 are provided on the cooling box 22 at intervals. A plurality of ventilation slots 25 penetrating the cooling box 22 are provided on the cooling box 22 along its own length direction, and the ventilation slots 25 are provided for gas to pass through to cool the cooling box 22; the plurality of cooling holes 26 are arranged corresponding to the plurality of heat dissipation fins 42, and the plurality of heat dissipation fins 42 vertically pass through the plurality of cooling holes 26 and extend to the top of the cooling box 22.

[0061] The bottom ends of the multiple connecting pipes 23 are fixedly mounted on the side wall of the cooling box 21 and the top ends are fixedly mounted on the side wall of the cooling box 22 . The multiple connecting pipes 23 are spaced apart along the length direction of the cooling box 21 and connect the cooling chamber 27 and the cooling box 21 .

[0062] Reference Figure 1 , Figure 5 The air cooling component 6 includes a fan 61, a shrink cover 62 and a guide tube 63. The fan 61 is fixedly installed on the car, or the fan 61 can also be fixedly installed on the fixed box 31. The fan 61 is located on one side of the fixed box 31 as an air outlet and is set toward the heat transfer component 4 and the cooling box 22. When the fan 61 is started, the gas flow direction is parallel to the length direction of the cooling box 22.

[0063] The shrinking hood 62 is fixedly mounted on the fan 61 and is connected to the air outlet of the fan 61. The end of the shrinking hood 62 away from the fan 61 is inwardly contracted and is used to gradually increase the air pressure. The guide tube 63 is fixedly mounted on the shrinking hood 62 and extends to one end of the cooling box 22 and the plurality of heat dissipating fins 42. The guide tube 63 is provided with a flat air outlet end 64 at the end close to the cooling box 22 and the heat dissipating fins 42. The air outlet end 64 can cover the cooling box 22 and the heat dissipating fins 42 located above the cooling box 22.

[0064] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5The heat on the battery body 1 is dissipated into the coolant through the wrapping piece 41 and the heat dissipation fins 43, the connecting piece 51 and the connecting fins 52. After the coolant in the cooling box 21 evaporates, it enters the cooling chamber 27 through the connecting pipe 23 for cooling. The fan 61 is started, so that the gas is blown to the cooling box 22 and the multiple heat dissipation fins 42 through the air outlet end 64. The gas can cool the cooling box 22 through the multiple ventilation slots 25, that is, it can cool the coolant in the cooling chamber 27, so that the evaporated coolant condenses into liquid and then flows back into the cooling box 21, thereby realizing cooling of the coolant and improving the heat dissipation effect of the battery; the heat on the battery body 1 can also be dissipated into the air through the wrapping piece 41 and the heat dissipation fins 42, and the gas blows air to the multiple heat dissipation fins 42, which accelerates the heat dissipation effect of the multiple heat dissipation fins 42 and improves the heat dissipation effect of the battery.

[0065] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5 A guide assembly 7 for guiding the gas to the cooling space 34 is provided on the shrink cover 62. The guide assembly 7 includes a guide pipe 71 and a guide end 72. The guide pipe 71 is fixedly installed on the shrink cover 62 and extends to one side of the cooling space 34. The guide end 72 is fixedly installed at one end of the guide pipe 71 close to the cooling space 34. The guide end 72 is flat and the pipe mouth can cover multiple cooling spaces 34. The gas is blown out through the guide pipe 71 and the guide end 72, and the gas moves in the cooling space 34, thereby accelerating the heat dissipation speed of the connecting piece 51 and the multiple heat dissipation fins 43, and further improving the heat dissipation effect of the battery body 1.

[0066] Reference Figure 1 and Figure 5 An air hood 65 is fixedly installed on the fan 61 and at the air inlet. The end of the air hood 65 away from the fan 61 is outwardly expanded and is used to introduce external air into the fan 61. Especially when the car is moving, the air hood 65 is located on the side of the fan 61 close to the forward moving direction of the car. The movement of the car allows more air to enter the fan 61 faster, increasing the amount of air during cooling, further improving the cooling effect on the battery, and increasing the battery life.

[0067] The working principle of the embodiment of the present application is as follows:

[0068] The heat on the battery body 1 is dissipated into the coolant through the wrapping part 41 and the heat dissipation fins 243, the connecting piece 51 and the connecting fins 52. The coolant in the cooling box 21 evaporates and enters the cooling chamber 27 for cooling. The evaporated coolant can also cool the coolant in the cooling box 21. At the same time, the fan 61 is started, and the gas can cool the coolant in the cooling chamber 27, so that the evaporated coolant condenses into liquid and then flows back into the cooling box 21. In addition, the gas also accelerates the heat dissipation effect of the connecting piece 51 and the heat dissipation fins 243 through the cooling space 34, further improving the heat dissipation effect of the battery and improving the battery life.

[0069] The heat on the battery body 1 can also be dissipated into the air through the wrapping member 41 and the heat dissipation fins 42, and the gas blows on the multiple heat dissipation fins 42, which accelerates the heat dissipation effect of the multiple heat dissipation fins 42, and further improves the heat dissipation effect of the battery. Furthermore, the two wrapping members 41 wrap the battery body 1, thereby being able to simultaneously improve the heat dissipation effect and the protection effect on the battery, and further improving the battery life.

[0070] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An automobile battery with a heat dissipation device, characterized in that: It comprises a battery body (1) and a heat dissipation mechanism (2) for dissipating heat from the battery body (1), wherein the heat dissipation mechanism (2) comprises: A cooling box (21) filled with cooling liquid; A protection box (3) is arranged on the cooling box (21) and allows the battery body (1) to be placed therein for protection; A heat-conducting component (4) is arranged on the protection box (3) and is in contact with the battery body (1); the heat-conducting component (4) extends downward through the cooling box (21) into the coolant and extends upward to above the protection box (3); A cooling box (22) is arranged on the top of the protection box (3) and has a cooling chamber (27) and a cooling hole (26) therein, and the heat conducting component (4) extends upward through the cooling hole (26) to the top of the cooling box (22); A plurality of connecting pipes (23) for connecting the cooling box (21) and the cooling chamber (27) so that the cooling liquid evaporates and moves into the cooling chamber (27) and the cooling liquid condenses into liquid and flows back into the cooling box (21); The air cooling component (6) is used to air cool the heat conducting component (4) and the temperature reduction box (22).

2. The automotive battery with a heat dissipation device according to claim 1, characterized in that: The heat conducting component (4) comprises: A wrapping member (41), wrapped around the battery body (1) and made of a metal material; A plurality of heat dissipation fins one (42) and a plurality of heat dissipation fins two (43) are respectively arranged on the upper and lower surfaces of the wrapping member (41); the heat dissipation fins one (42) pass upward through the protection box (3) and the cooling hole (26) and extend to the top of the cooling box (22); and the heat dissipation fins two (43) pass downward through the protection box (3) and the upper surface of the cooling box (21) and are immersed in the coolant.

3. The automotive battery with a heat dissipation device according to claim 2, characterized in that: The cooling box (21) is provided with a connecting assembly (5) connected to the second heat sink fin (43), the connecting assembly (5) comprising a connecting sheet (51) made of a metal material and a plurality of connecting fins (52), the plurality of connecting fins (52) being arranged on the connecting sheet (51) and passing through the cooling box (21) and immersed in a coolant, and when the protection box (3) is installed on the cooling box (21), the connecting sheet (51) is pushed against the upper surface of the cooling box (21) for positioning and the second heat sink fin (43) is inserted and installed on the connecting sheet (51) for positioning.

4. The automotive battery with a heat dissipation device according to claim 3, characterized in that: The connecting piece (51) is provided with a sealing ring which is pressed against the cooling box (21) for sealing.

5. The automotive battery with a heat dissipation device according to claim 2, characterized in that: The protection box (3) comprises a fixed box (31) and a sealing box (32) detachably arranged on the fixed box (31); two wrapping members (41) are provided and are located in the fixed box (31) and the sealing box (32); the two wrapping members (41) are mutually abutted and used to wrap the battery body (1); the heat dissipation fin 1 (42) and the heat dissipation fin 2 (43) are respectively provided on the two wrapping members (41) and are respectively slidably arranged on the sealing box (32) and the fixed box (31).

6. The automotive battery with a heat dissipation device according to claim 2, characterized in that: The air cooling component (6) comprises: A fan (61) for blowing air for cooling; A retractable cover (62) is arranged at the air outlet of the fan (61) and is in an inwardly retracted shape; The guide tube (63) is arranged on the shrink cover (62) and has a tube opening at one end away from the fan (61) capable of covering the second heat dissipation fin (43) and the air outlet end (64) of the cooling box (22).

7. The automotive battery with a heat dissipation device according to claim 6, characterized in that: The air flow direction blown out by the air outlet (64) is parallel to the length direction of the second heat sink fin (43), and the cooling box (22) is provided with a plurality of ventilation slots (25) penetrating the cooling box (22) along the length direction of the second heat sink fin (43).

8. The automotive battery with a heat dissipation device according to claim 6, characterized in that: The protection box (3) is provided with a support block (33) pressed against the connecting piece (51), the support block (33) forms a cooling space (34) for air to pass between two adjacent heat dissipation fins (42), and the shrink cover (62) is provided with a guide component (7) for guiding gas to the cooling space (34).

9. The automotive battery with a heat dissipation device according to claim 8, characterized in that: The guide component (7) comprises: A guide pipe (71) is disposed on the shrink cover (62) and extends to the cooling space (34); The guide end (72) is arranged on the guide pipe (71) and the pipe mouth can cover a plurality of cooling spaces (34) and allow the gas to pass through the plurality of cooling spaces (34) to dissipate heat.

10. The automotive battery with a heat dissipation device according to claim 6, characterized in that: The fan (61) is provided with an air inlet hood (65) for guiding air to enter.

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