Heat dissipation device of vehicle battery pack, battery pack system and vehicle

Abstract

The utility model relates to the technical field of vehicle battery pack heat dissipation, and discloses a heat dissipation device of a vehicle battery pack, a battery pack system and a vehicle, the device comprises a heat dissipation box, a containing cavity is formed in the heat dissipation box, the containing cavity is used for containing the battery pack, a liquid storage cavity is formed in the hollow box body wall of the heat dissipation box, and the liquid storage cavity is used for guiding in cooling liquid; the battery pack is cooled through the cooling liquid; and the liquid storage equipment is communicated with the liquid storage cavity, is used for storing a cooling liquid, and is also used for guiding the cooling liquid into the liquid storage cavity to dissipate heat of the battery pack when the current temperature of the battery pack is higher than a preset temperature. Therefore, through the arrangement of the heat dissipation box, heat dissipation can be carried out by introducing the cooling liquid when the temperature of the battery pack is relatively high, and the heat dissipation requirement of the battery pack can be met.

Description

Technical Field

[0001] This application relates to the field of vehicle battery pack heat dissipation technology, specifically to a heat dissipation device for a vehicle battery pack, a battery pack system, and a vehicle. Background Technology

[0002] The battery pack, as a crucial component of new energy vehicles, provides the driving force for the vehicle's operation. The battery pack's performance is related to its temperature; higher temperatures result in poorer performance. Furthermore, lower ambient temperatures also negatively impact the battery pack's performance.

[0003] To address this issue, current battery packs incorporate a heat dissipation structure, utilizing coolant circulating within this structure for both heat dissipation and insulation. However, when the battery pack temperature is high, this internal heat dissipation structure is insufficient to meet the pack's cooling requirements. Utility Model Content

[0004] In view of the above problems, this application provides a heat dissipation device for a vehicle battery pack, a battery pack system and a vehicle. By setting up a heat dissipation box, coolant can be introduced to dissipate heat when the battery pack temperature is high, thereby meeting the heat dissipation requirements of the battery pack.

[0005] The first aspect of this application provides a heat dissipation device for a vehicle battery pack, comprising: a heat dissipation box having a receiving cavity for housing the battery pack, the heat dissipation box having a hollow wall forming a liquid storage cavity for introducing coolant to dissipate heat from the battery pack; and a liquid storage device communicating with the liquid storage cavity for storing coolant, and further for introducing coolant into the liquid storage cavity to dissipate heat from the battery pack when the current temperature of the battery pack is higher than a preset temperature.

[0006] In some specific embodiments, the heat sink includes a bottom wall, a top wall, and a side wall. The bottom wall, top wall, and side wall of the heat sink enclose a receiving cavity, and the bottom wall is opposite to the bottom of the battery pack. The liquid storage cavity includes a first liquid storage area and a second liquid storage area that are isolated from each other. The first liquid storage area is disposed in the bottom wall. The liquid storage device is used to introduce coolant into the first liquid storage area when the current temperature of the battery pack is higher than a preset temperature but lower than a limit temperature.

[0007] In some specific embodiments, the liquid storage device includes a liquid reservoir and a water pump. The water pump is connected to the liquid reservoir, a first liquid storage area, and a second liquid storage area, respectively. The water pump is used to draw coolant from the liquid reservoir to the first liquid storage area and / or the second liquid storage area.

[0008] In some specific embodiments, the heat dissipation device further includes a radiator, and the radiator, the liquid storage device, and the liquid storage chamber constitute a heat dissipation circuit. The liquid storage device is also used to realize the circulation of coolant in the heat dissipation circuit, and the radiator is used to dissipate heat from the coolant in the heat dissipation circuit.

[0009] In some specific embodiments, the heat sink includes an outer shell and an inner shell, with the outer shell and the inner shell spaced apart to form a liquid storage cavity. The outer shell is provided with a first heat dissipation structure and / or the inner shell is provided with a second heat dissipation structure. The first heat dissipation structure is used to contact the air to dissipate heat from the heat sink, and the second heat dissipation structure is used to contact the battery pack to dissipate heat from the battery pack.

[0010] In some specific embodiments, a heat dissipation support structure is provided inside the liquid storage cavity. The heat dissipation support structure is connected to the outer shell and the inner shell respectively. The heat dissipation support structure is used to support the liquid storage cavity and to conduct the heat of the coolant to the outer shell for dissipation.

[0011] In some specific embodiments, the heat dissipation device also includes a heater connected to the liquid storage chamber. The heater is used to generate warm air and introduce it into the liquid storage chamber, which does not contain coolant, when the current ambient temperature is lower than the preset ambient temperature, so as to heat the battery pack.

[0012] In some specific embodiments, the heat dissipation device further includes a controller connected to a liquid storage device. The controller is used to control the liquid storage device to introduce coolant into the liquid storage chamber to dissipate heat from the battery pack when the current temperature of the battery pack is higher than a preset temperature. The controller is also used to control the liquid storage device to draw coolant from the liquid storage chamber into the liquid storage device when the current ambient temperature is lower than a preset ambient temperature.

[0013] A second aspect of this application provides a vehicle battery pack system, comprising: a heat dissipation device for a vehicle battery pack as described in any of the preceding claims; and a battery pack disposed within the heat dissipation device, the heat dissipation device being used to dissipate heat from the battery pack.

[0014] A third aspect of this application provides a vehicle that includes the battery pack system of the vehicle described above.

[0015] This application provides at least the following beneficial effects: The vehicle battery pack cooling device provided in this application includes: a cooling box with a accommodating cavity for housing the battery pack; a liquid storage cavity formed in the hollow wall of the cooling box for introducing coolant to dissipate heat from the battery pack; and a liquid storage device connected to the liquid storage cavity for storing coolant and also for introducing coolant into the liquid storage cavity to dissipate heat from the battery pack when the current temperature of the battery pack is higher than a preset temperature. Therefore, by setting up the cooling box, heat dissipation can be achieved by introducing coolant when the battery pack temperature is high, thus meeting the heat dissipation requirements of the battery pack.

[0016] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of this application are described below. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the heat dissipation device for a vehicle battery pack provided in this application;

[0019] Figure 2 yes Figure 1 A schematic diagram of a portion of the structure shown;

[0020] Figure 3 yes Figure 2 The structure shown is a cross-sectional view along section line AA;

[0021] Figure 4 yes Figure 3 An enlarged structural diagram of region A in the diagram;

[0022] Figure 5 yes Figure 2 A schematic diagram of the structure after removing part of the structure shown.

[0023] Figure 6 yes Figure 5 An enlarged structural diagram of region B in the diagram.

[0024] Explanation of reference numerals in the attached drawings: 10 heat dissipation device for vehicle battery pack, 11 heat dissipation box, 111 accommodating cavity, 112 liquid storage cavity, 113 bottom wall, 114 top wall, 115 side wall, 116 heat dissipation support structure, 12 liquid storage device, 20 battery pack.

[0025] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0027] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0029] The first aspect of this application provides a heat dissipation device 10 for a vehicle battery pack. Figure 1 This is a schematic diagram of a structure of an embodiment of the heat dissipation device 10 for a vehicle battery pack provided in this application. Figure 2 yes Figure 1 A schematic diagram of a portion of the structure shown. Figure 3 yes Figure 2 The structure shown is a cross-sectional view along section line AA. Figure 4 yes Figure 3 An enlarged structural diagram of region A in the diagram.

[0030] Combination Figure 1 The vehicle battery pack cooling system 10 includes a cooling box 11 and a coolant storage device 12. The cooling box 11 is used to dissipate heat from the battery pack 20, and the coolant storage device 12 is used to store coolant and control the flow of coolant into and out of the cooling box 11, so as to achieve heat dissipation through the coolant. Figure 1 The image only shows a portion of the structure of the liquid storage device 12, such as some pipelines and water pumps.

[0031] Specifically, the heat dissipation box 11 has a hollow cavity 111 for accommodating the battery pack 20, so that the battery pack 20 is disposed within the cavity 111. The shape and size of the cavity 111 can be adapted to the shape and size of the battery pack 20, thereby allowing the battery pack 20 to be well accommodated within the cavity 111. In this case, the distance between the outer wall of the battery pack 20 and the cavity wall of the cavity 111 can be small, thereby enabling the heat dissipation box 11 to have a good heat dissipation effect on the battery pack 20. For example, when the battery pack is roughly rectangular, the shape of the cavity 111 can also be roughly rectangular, and the size of the cavity 111 is slightly larger than the size of the battery pack 20.

[0032] Furthermore, the heat dissipation box 11 has a hollow wall forming a liquid storage cavity 112, which is used to introduce coolant to dissipate heat from the battery pack 20. The heat dissipation box 11 may have a partially hollow wall forming the liquid storage cavity 112, or it may have a completely hollow wall forming the liquid storage cavity 112, depending on actual needs; this embodiment does not impose specific limitations.

[0033] It should be understood that the liquid storage chamber 112 and the receiving chamber 111 are spaced apart at this time, meaning that when coolant is introduced into the liquid storage chamber 112, the coolant and the battery pack 20 do not come into contact with each other. To achieve good heat exchange between the coolant and the battery pack 20, the side wall 115 of the heat sink 11 can be made of a material with good thermal conductivity. For example, the casing wall of the heat sink 11 can be made of a metal material with good thermal conductivity, while ensuring the structural strength of the heat sink 11.

[0034] Specifically, the liquid storage device 12 is connected to the liquid storage chamber 112, and the liquid storage device 12 and the liquid storage chamber 112 can be connected by a pipe. The liquid storage device 12 is used to store coolant and includes components such as a liquid storage bottle, mainly for storing coolant. The liquid storage device 12 is also used to introduce coolant into the liquid storage chamber 112 to dissipate heat from the battery pack 20 when the current temperature of the battery pack 20 is higher than a preset temperature. The liquid storage device 12 is also equipped with a power device, which is mainly used to introduce coolant from the liquid storage device 12 into the liquid storage chamber 112. For example, the power device can be a water pump or other components.

[0035] It should be understood that the preset temperature is set according to actual needs, and the preset temperature can be a relatively high temperature. When the current temperature of the battery pack 20 is higher than the preset temperature, it indicates that the working state of the battery pack 20 may be adversely affected by the high temperature. At this time, coolant is drawn into the storage chamber 112 through the liquid storage device 12, thereby allowing the coolant to dissipate heat from the battery pack 20. Of course, in some embodiments, if the temperature of the battery pack 20 returns to the preset temperature or below, the coolant in the storage chamber 112 can be drawn out through the liquid storage device 12. At this time, although there is no coolant in the heat sink 11, due to the existence of the structure of the heat sink 11 itself, the heat sink 11 can still achieve heat preservation for the battery pack 20 (especially suitable for scenarios with low ambient temperature) and play a certain protective role for the battery pack 20.

[0036] Combination Figure 4 In some specific embodiments, the heat sink 11 includes a bottom wall 113, a top wall 114, and a side wall 115, which together form an accommodating cavity 111. In this case, the top wall 114 of the heat sink 11 faces the top of the battery pack 20, the side wall 115 faces the side of the battery pack 20, and the bottom wall 113 faces the bottom of the battery pack 20.

[0037] Based on this structural arrangement of the heat sink 11, the liquid storage chamber 112 includes a first liquid storage area and a second liquid storage area that are isolated from each other. The first liquid storage area is located within the bottom wall 113 of the heat sink 11. That is, the liquid storage chamber 112 is composed of the first liquid storage area and the second liquid storage area. Since the two liquid storage areas are isolated from each other, coolant can be introduced into either or both of the first liquid storage area and the second liquid storage area. At this time, the first liquid storage area is located on the bottom wall 113 of the heat sink 11, and the second liquid storage area is located on the side wall 115 and / or the top wall 114 of the heat sink 11. The first liquid storage area can cover the entire bottom wall 113 of the heat sink 11, or it can be only located on a portion of the bottom wall 113 of the heat sink 11; no specific limitation is made here.

[0038] Based on the setup of the first liquid storage area, the liquid storage device 12 is used to introduce coolant into the first liquid storage area when the current temperature of the battery pack 20 is higher than a preset temperature but lower than a limit temperature. The limit temperature is higher than the preset temperature, but not an extremely high temperature, and can be set according to actual needs. When the current temperature of the battery pack 20 is higher than the preset temperature but lower than the limit temperature, it indicates that the battery pack 20 is currently generating a significant amount of heat, but not in a severely overheated state. At this time, heat dissipation can be applied to the most severely overheated parts of the battery pack 20, while other parts can temporarily bypass heat dissipation through the heat sink 11. The bottom of the battery pack 20 is generally the area with the most severe heat generation; therefore, dissipating heat from the bottom of the battery pack 20 through the first liquid storage area meets the specific heat dissipation requirements of the current scenario. Furthermore, when the current temperature of the battery pack 20 is higher than the limit temperature, coolant can be introduced into both the first and second liquid storage areas simultaneously, thereby achieving more comprehensive heat dissipation for the battery pack 20.

[0039] It should be understood that, Figure 4 The image only shows the portion of the liquid storage chamber 112 located on the side wall 115 of the heat sink 11, and does not show the portions located on the top wall 114 and bottom wall 113. The arrangement of the liquid storage chamber 112 on the side wall 115 can be referenced.

[0040] Furthermore, in the embodiment where the liquid storage device 12 includes a liquid reservoir and a water pump, the water pump is connected to the liquid reservoir, the first liquid storage area, and the second liquid storage area, respectively. The water pump is used to draw coolant from the liquid reservoir to the first liquid storage area and / or the second liquid storage area. At this time, the water pump can draw coolant to either or both of the first and second liquid storage areas according to actual needs to meet different heat dissipation requirements.

[0041] To achieve better heat dissipation of the coolant, in some specific embodiments, the heat dissipation device further includes a radiator. The radiator, the coolant storage device 12, and the coolant storage chamber 112 constitute a heat dissipation circuit. The coolant storage device 12 is also used to circulate the coolant in the heat dissipation circuit, and the radiator is used to dissipate heat from the coolant in the heat dissipation circuit. At this time, the coolant in the heat dissipation circuit will circulate. The coolant flowing into the coolant storage chamber 112 in the heat dissipates heat from the battery pack 20. The coolant flowing out of the coolant storage chamber 112 with increased temperature can enter the radiator to dissipate heat, and the coolant with decreased temperature will further enter the coolant storage chamber 112. This circulation ensures that the coolant temperature remains low, thereby achieving a good heat dissipation effect on the battery pack 20.

[0042] Regarding the specific configuration of the heat sink 11, in some specific embodiments, the heat sink 11 includes an outer shell and an inner shell, with the outer shell and inner shell spaced apart to form a liquid storage cavity 112. This method allows for convenient fabrication of the liquid storage cavity 112. In this case, to achieve better heat dissipation of the heat sink 11, the outer shell is provided with a first heat dissipation structure and / or the inner shell is provided with a second heat dissipation structure. The first and second heat dissipation structures can be the same heat dissipation structure, or conventional heat dissipation structures in the prior art, and are not specifically limited here. Since the first heat dissipation structure is located on the outer shell of the heat sink 11, it is mainly used to contact the air to dissipate heat from the heat sink 11, thereby reducing the temperature of the coolant inside the heat sink 11. Since the second heat dissipation structure is located on the inner shell of the heat sink 11, it is used to contact the battery pack 20, so that the heat from the battery pack 20 is conducted through the second heat dissipation structure to the inner shell and absorbed by the coolant, thereby achieving heat dissipation of the battery pack 20.

[0043] Figure 5 yes Figure 2 The diagram shows the structure after removing part of the structure shown. Figure 6 yes Figure 5 An enlarged structural diagram of region B in the diagram.

[0044] Combination Figure 5 as well as Figure 6 In some specific embodiments, a heat dissipation support structure 116 is provided inside the liquid storage cavity 112. The heat dissipation support structure 116 is connected to both the outer shell and the inner shell. The heat dissipation support structure 116 is used to support the liquid storage cavity 112 and also to conduct the heat of the coolant to the outer shell for dissipation. It should be understood that one end of the heat dissipation support structure 116 is connected to the outer shell and the other end is connected to the inner shell, thereby maintaining the distance between the outer shell and the inner shell, and thus making the structure of the liquid storage cavity 112 more stable. On the other hand, the heat dissipation support structure 116 can be made of a material with good thermal conductivity, so that the heat of the coolant can be effectively conducted to the outer shell, and some of the heat can be dissipated through the outer shell. At the same time, it can also directly conduct the heat of the inner shell to the outer shell, thereby achieving heat dissipation of the battery pack 20.

[0045] The design of the heat dissipation support structure 116 must ensure both structural strength and good thermal conductivity. To guarantee structural strength, it can be designed as a trapezoidal structure, with its two bases connecting to the outer and inner shells respectively. To further ensure good thermal conductivity, connecting structures can be incorporated within the trapezoidal shape, increasing the contact area with the coolant and enhancing the structural strength of the heat dissipation support structure 116.

[0046] It should be understood that the heat dissipation device provided in the above embodiments achieves heat dissipation through coolant. However, in scenarios with low ambient temperature, the heat dissipation device itself can achieve a certain heat preservation effect due to its structure, but the heat preservation effect is not strong.

[0047] To enhance the heat dissipation device's insulation and heating effects in low-temperature environments, in some specific embodiments, the heat dissipation device also includes a heater (not shown). The heater is connected to the coolant reservoir 112. When the current ambient temperature is lower than a preset ambient temperature, the heater generates warm air and directs it into the coolant reservoir 112, which contains no coolant, to heat the battery pack 20. The heater generates warm air, and because it is connected to the coolant reservoir 112, it can direct the generated warm air into the reservoir 112, thereby providing a certain degree of insulation and heating. The preset ambient temperature can be a pre-set, relatively low ambient temperature. Only when the current ambient temperature is lower than the preset ambient temperature will the battery pack 20 have a strong demand for heat dissipation and heating, at which point the heater will generate warm air and direct it into the coolant reservoir 112.

[0048] To achieve automatic control of the heat dissipation device, in some specific embodiments, the heat dissipation device further includes a controller (not shown). The controller is connected to the liquid storage device 12. When the current temperature of the battery pack 20 is higher than a preset temperature, the controller controls the liquid storage device 12 to introduce coolant into the liquid storage chamber 112 to dissipate heat from the battery pack 20. The controller is also used to control the liquid storage device 12 to draw coolant from the liquid storage chamber 112 into the liquid storage device 12 when the current ambient temperature is lower than a preset ambient temperature.

[0049] At this time, the control device can obtain the current temperature of the battery pack 20 and the current ambient temperature, and then control the liquid storage device 12 based on these two temperatures. Specifically, it controls the pump of the liquid storage device 12 to achieve the introduction and extraction of coolant. It should be understood that, corresponding to the above-described implementation of coolant extraction, it is particularly emphasized that when the current ambient temperature is lower than the preset ambient temperature, the control device extracts the coolant, thereby achieving a better heat preservation effect for the battery pack 20 through the structure of the heat sink 11 itself.

[0050] A second aspect of this application provides a vehicle battery pack 20 system, including: a heat dissipation device 10 for the vehicle battery pack as described in any of the above embodiments; and a battery pack 20 disposed within the heat dissipation device, which is used to dissipate heat from the battery pack 20. By providing the heat dissipation device, the battery pack 20 in the battery pack 20 system can achieve good heat dissipation, thereby ensuring the good working condition of the battery pack 20 system.

[0051] A third aspect of this application provides a vehicle that includes the aforementioned battery pack 20 system. In this case, because the battery pack 20 system has good heat dissipation, the vehicle can have better discharge performance, thereby improving various aspects of the vehicle's performance.

[0052] In summary, the vehicle battery pack cooling device 10 provided in this application includes: a cooling box 11 with a receiving cavity 111 for housing the battery pack 20; a liquid storage cavity 112 formed in the hollow wall of the cooling box 11 for introducing coolant to dissipate heat from the battery pack 20; and a liquid storage device 12 connected to the liquid storage cavity 112 for storing coolant and introducing coolant into the liquid storage cavity 112 to dissipate heat from the battery pack 20 when the current temperature of the battery pack 20 is higher than a preset temperature. Therefore, by setting up the cooling box 11, heat dissipation can be achieved by introducing coolant when the temperature of the battery pack 20 is high, thus meeting the heat dissipation requirements of the battery pack 20.

[0053] The above description is merely an optional embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A heat dissipation device for a vehicle battery pack, characterized in that, include: A heat dissipation box has a receiving cavity for accommodating the battery pack. The box wall of the heat dissipation box is hollow and has a liquid storage cavity for introducing coolant to dissipate heat from the battery pack. A liquid storage device is connected to the liquid storage chamber. The liquid storage device is used to store coolant. The liquid storage device is also used to introduce the coolant into the liquid storage chamber to dissipate heat from the battery pack when the current temperature of the battery pack is higher than a preset temperature.

2. The heat dissipation device according to claim 1, characterized in that, The heat dissipation box includes a bottom wall, a top wall, and a side wall. The bottom wall, top wall, and side wall of the heat dissipation box enclose the accommodating cavity, and the bottom wall is opposite to the bottom of the battery pack. The liquid storage chamber includes a first liquid storage area and a second liquid storage area that are isolated from each other. The first liquid storage area is disposed within the bottom wall. The liquid storage device is used to introduce the coolant into the first liquid storage area when the current temperature of the battery pack is higher than the preset temperature but lower than the limit temperature.

3. The heat dissipation device according to claim 2, characterized in that, The liquid storage device includes a liquid reservoir and a water pump. The water pump is connected to the liquid reservoir, the first liquid storage area, and the second liquid storage area, respectively. The water pump is used to draw the coolant in the liquid reservoir into the first liquid storage area and / or the second liquid storage area.

4. The heat dissipation device according to claim 1, characterized in that, The heat dissipation device further includes a radiator, and the radiator, the liquid storage device, and the liquid storage chamber constitute a heat dissipation circuit. The liquid storage device is also used to realize the circulation of the coolant in the heat dissipation circuit, and the radiator is used to dissipate heat from the coolant in the heat dissipation circuit.

5. The heat dissipation device according to claim 1, characterized in that, The heat dissipation box includes an outer shell and an inner shell, the outer shell and the inner shell are spaced apart to form the liquid storage cavity, the outer shell is provided with a first heat dissipation structure and / or the inner shell is provided with a second heat dissipation structure; The first heat dissipation structure is used to contact the air to dissipate heat from the heat dissipation box, and the second heat dissipation structure is used to contact the battery pack to dissipate heat from the battery pack.

6. The heat dissipation device according to claim 5, characterized in that, A heat dissipation support structure is provided inside the liquid storage cavity. The heat dissipation support structure is connected to the outer shell and the inner shell respectively. The heat dissipation support structure is used to support the liquid storage cavity and to conduct the heat of the coolant to the outer shell for dissipation.

7. The heat dissipation device according to claim 1, characterized in that, The heat dissipation device also includes a heater, which is connected to the liquid storage chamber. The heater is used to generate warm air and introduce it into the liquid storage chamber, which does not contain the coolant, when the current ambient temperature is lower than the preset ambient temperature, so as to heat the battery pack.

8. The heat dissipation device according to claim 1, characterized in that, The heat dissipation device also includes a controller connected to the liquid storage device. The controller is used to control the liquid storage device to introduce the coolant into the liquid storage chamber to dissipate heat from the battery pack when the current temperature of the battery pack is higher than the preset temperature. The control device is also used to control the liquid storage device to pump the coolant in the liquid storage chamber into the liquid storage device when the current ambient temperature is lower than the preset ambient temperature.

9. A battery pack system for a vehicle, characterized in that, include: A heat dissipation device for a vehicle battery pack as described in any one of claims 1-8; The battery pack is disposed within the heat dissipation device, which is used to dissipate heat from the battery pack.

10. A vehicle, characterized in that, The vehicle includes the battery pack system of the vehicle as described in claim 9.

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