A multi-layer heat dissipation structure for battery pack

Abstract

The present invention relates to the technical field of heat dissipation of battery packs, and discloses a multi-layer heat dissipation structure for a battery pack, comprising: a carrying box, which comprises a box body and a box cover matched therewith, wherein the inner cavity of the box body is divided into a carrying area and a heat dissipation area from top to bottom; the heat dissipation area is provided with a water cooling mechanism and an air cooling mechanism, and the air cooling mechanism is located below the water cooling mechanism; a partition plate is provided with a plurality of groups, which are plugged into the top side wall of the water cooling mechanism and limited to the edge side wall of the box body; in the present invention, by improving the box structure for accommodating the battery pack, the box body has the heat dissipation modes of natural cooling, water cooling and air cooling, and the overall structure of the carrying box is simple, which meets the requirements of lightweight, is easy to install the battery pack, meets different heat dissipation requirements, and has excellent structural characteristics.

Description

Technical Field

[0001] The present invention relates to the technical field of battery pack heat dissipation, and in particular to a multi-layer heat dissipation structure for a battery pack. Background Art

[0002] In recent years, with the vigorous advocacy of energy conservation and emission reduction, new energy electric vehicles have been greatly developed. The main power of new energy vehicles comes from the power batteries they are equipped with, which are also the core components of new energy electric vehicles. The performance of the batteries directly affects the performance of electric vehicles. The power batteries are generally large in size and occupy the chassis position of the vehicle. The original power batteries have high energy density, but are compactly assembled, so they cannot get good heat dissipation during use.

[0003] In electric vehicles, the common heat dissipation method for power batteries is generally natural cooling, air cooling or water cooling. The impact of temperature on power batteries is huge; taking lithium batteries as an example, the internal optimal charging and discharging temperature cannot be higher than 140°C, and the external temperature cannot be higher than 80°C, otherwise it will reduce the battery life and charging and discharging effect, making it difficult to give full play to the advantages of electric vehicles.

[0004] These three heat dissipation methods have their own advantages. Natural cooling is only used when the battery temperature is safe enough due to its low cooling efficiency; air cooling has a simple structure and is the current market mainstream; water cooling has a complex structure, but its cooling efficiency and controllability are the highest. How to effectively combine the three heat dissipation methods to achieve the best heat dissipation effect has always been the pursuit of major manufacturers and research institutions. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the above-mentioned problems existing in the heat dissipation of the existing electric vehicle battery pack, the present invention is proposed.

[0007] Therefore, an object of the present invention is to provide a multi-layer heat dissipation structure for a battery pack, which is used to combine natural cooling, air cooling and water cooling to achieve better heat dissipation for the automotive battery pack.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a multi-layer heat dissipation structure for a battery pack, comprising a carrying box, which includes a box body and a matching box cover, and the inner cavity of the box body is divided into a carrying area and a heat dissipation area from top to bottom; the heat dissipation area is provided with a water cooling mechanism and an air cooling mechanism, and the air cooling mechanism is located below the water cooling mechanism; a partition plate is provided with several groups, which are plugged into the top side wall of the water cooling mechanism and limited to the edge side wall of the box body.

[0009] As a preferred solution of the multi-layer heat dissipation structure for a battery pack described in the present invention, wherein: a through fan hole is provided on the bottom side wall of the box body; a plurality of groups of first partition ribs and second partition ribs are provided on the inner cavity side wall of the box body, the first partition ribs are located on the inner cavity length side of the box body, and the second partition ribs are located on the inner cavity width side of the box body; an air inlet is provided on the box cover.

[0010] As a preferred solution of the multi-layer heat dissipation structure for the battery pack described in the present invention, wherein: the first partition rib and the second partition rib are both perpendicular to the side wall of the box body, and connecting holes are opened in the rib side walls of both, and the first partition rib and the second partition rib form an air duct through the connecting hole; the first partition rib is located on the supporting platform of the side wall of the box body, and the supporting platform is provided with card slots at equal intervals, and the width of the first partition rib can adapt to the setting of the card slot.

[0011] As a preferred solution of the multi-layer heat dissipation structure for a battery pack described in the present invention, the water cooling mechanism includes a water cooling box, a heat sink disposed in the water cooling box and extending into the inner cavity of the box, and a water cooling pipeline connected to the water cooling box; the heat sink is provided in several groups and distributed at equal intervals; both ends of the length side of the water cooling box are in contact with the second partition rib, and both ends of the width side are connected to the support platform.

[0012] As a preferred solution of the multi-layer heat dissipation structure for a battery pack of the present invention, the heat dissipation element includes a contact block, a heat pipe and a heat dissipation fin.

[0013] The contact block is embedded in the upper side wall of the water cooling box and extends into the inner cavity of the box. One end of the heat pipe is embedded in the contact block, and the other end extends into the water cooling box and is connected to a plurality of groups of heat dissipation fins.

[0014] As a preferred solution of the multi-layer heat dissipation structure for a battery pack described in the present invention, a plug-in slot is provided on the top surface of the contact block, the heat pipe is located in the plug-in slot, and the plug-in slot corresponds to the card slot.

[0015] As a preferred solution of the multi-layer heat dissipation structure for a battery pack described in the present invention, wherein: the heat pipe is located at one end of the heat dissipation fin and extends to no less than 2 branch pipes; the end of the heat dissipation fin away from the heat pipe penetrates the bottom side wall of the water cooling box and extends to the air cooling cavity of the heat dissipation area.

[0016] As a preferred solution of the multi-layer heat dissipation structure for a battery pack described in the present invention, the water cooling pipeline includes a water inlet pipe and a water outlet pipe communicated with the water cooling box, and a circulating pump connected to the water inlet pipe or the water outlet pipe; the water inlet pipe and the water outlet pipe are distributed at relative corners of the water cooling box.

[0017] As a preferred solution of the multi-layer heat dissipation structure for a battery pack described in the present invention, the air cooling mechanism includes no less than a heat dissipation fan, and the heat dissipation fan is installed at the fan hole.

[0018] As a preferred solution of the multi-layer heat dissipation structure for a battery pack described in the present invention, the partition plate is divided into a lower plug-in block and an upper heat-conducting clamping plate, the heat-conducting clamping plate has an interlayer inside, and the interlayer is connected to the air duct.

[0019] Beneficial effects of the present invention:

[0020] In the present invention, the box structure for containing the battery pack is improved so that the box has the heat dissipation modes of natural cooling, water cooling and air cooling. The overall structure of the carrying box is simple, which meets the requirements of lightweight, is easy to install the battery pack, meets different heat dissipation requirements, and has excellent structural characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0022] Figure 1 It is a schematic diagram of the overall structure of the multi-layer heat dissipation structure for a battery pack of the present invention.

[0023] Figure 2 It is a schematic diagram of the specific assembly structure of the multi-layer heat dissipation structure for a battery pack of the present invention.

[0024] Figure 3 It is a schematic diagram of the overall structure of the carrying box of the multi-layer heat dissipation structure for the battery pack of the present invention.

[0025] Figure 4 It is a schematic diagram of the internal structure of the box of the multi-layer heat dissipation structure used for the battery pack of the present invention.

[0026] Figure 5 It is a schematic diagram of the specific internal structure of the carrying box of the multi-layer heat dissipation structure for the battery pack of the present invention.

[0027] Figure 6 It is a schematic diagram of the connection structure of heat pipes and heat dissipation fins of the multi-layer heat dissipation structure for a battery pack of the present invention.

[0028] Figure 7 It is a schematic diagram of the connection structure between the partition plate and the heat sink of the multi-layer heat dissipation structure for the battery pack of the present invention.

[0029] Figure 8 Schematic diagram of the air-cooling and water-cooling operation trends of the multi-layer heat dissipation structure for the battery pack of the present invention. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0033] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included. Example

[0034] Reference Figures 1 to 4 , which is the first embodiment of the present invention, provides a multi-layer heat dissipation structure for a battery pack. This heat dissipation structure is mainly a carrying box 100 for holding the battery pack of an electric vehicle. The box structure is improved so that it can naturally cool the internal battery pack, and dissipate heat through air cooling and water cooling, and the power of air cooling and water cooling is controlled, thereby adjusting to achieve different heat dissipation effects.

[0035] Specifically, the carrying box 100 includes a box body 101 and a matching box cover 102. The inner cavity of the box body 101 is divided into a carrying area A and a heat dissipation area B from top to bottom; the heat dissipation area B is provided with a water cooling mechanism 103 and an air cooling mechanism 104, and the air cooling mechanism 104 is located below the water cooling mechanism 103.

[0036] The box cover 102 is provided with an air inlet 102 a.

[0037] The carrying box 100 is used to hold the car battery pack. Its specific shape is determined by the final position of the car chassis where it is installed. The shape in this figure is only used for structural illustration. The box body 101 is the main part. The box cover 102 matches the opening of the box body 101 and is used to encapsulate the box body 101 to form protection for the battery pack placed inside. There is an air inlet 102a on its side wall for air intake and ventilation in the box body 101. The carrying area A of the box body 101 is used to place the battery pack, and the heat dissipation area B is used to dissipate heat from the battery pack. The water cooling mechanism 103 and the air cooling mechanism 104 are distributed in the lower part of the box body 101 to achieve specific heat dissipation actions.

[0038] The partition plates 200 are provided in several groups, and are plugged on the top side wall of the water cooling mechanism 103 and are limited to the edge side wall of the box body 101. The partition plates 200 are installed in the bearing area A in the box body 101, and are used to separate the battery packs.

[0039] Specifically, the partition plate 200 is divided into a lower plug-in block 201 and an upper heat-conducting splint 202. The heat-conducting splint 202 has an interlayer J inside, and the interlayer J is connected to the air duct F. The splints on both sides of the upper part of the heat-conducting splint 202 are made of materials with high thermal conductivity, which makes it easy to extract the heat from the battery pack in contact with it to avoid heat concentration, and conduct it to the contact block 103b-1, and then the heat is exchanged by the heat pipe 103b-2. The interlayer J is used for gas circulation, which not only avoids the influence of the heat of the battery pack on the adjacent battery pack, but also can cooperate with air cooling for heat dissipation. Moreover, the interlayer makes the partition plate 200 lighter, and the interlayer J can also buffer the impact of the battery pack in the distribution direction, further improving the safety of the safety pack.

[0040] In this embodiment, the battery pack is placed in the bearing area A of the box 101 through the partition plate 200, and the battery pack is cooled to varying degrees by natural cooling of the box 101 and the water cooling mechanism 103 and the air cooling mechanism 104; the box cover 102 is arranged on the top of the box 101. Example

[0041] Reference Figures 3 to 7 , which is the second embodiment of the present invention, is based on the previous embodiment, and is different from the previous embodiment in that:

[0042] The bottom side wall of the box 101 is provided with a through fan hole 101a; the fan hole 101a is used to install the heat dissipation fan in air cooling, and multiple fan holes 101a can be provided, depending on factors such as the size of the box 101, the air volume required for air cooling, the power consumption of the fan, and the specific installation position of the battery pack; it should be noted that the number of fan holes 101a corresponds to the number of installed fans. In this embodiment, two fan holes 101a are used as an example for demonstration.

[0043] Furthermore, a plurality of groups of first partition ribs 101 b and second partition ribs 101 c are provided on the inner cavity side wall of the box body 101 . The first partition ribs 101 b are located on the inner cavity length side of the box body 101 , and the second partition ribs 101 c are located on the inner cavity width side of the box body 101 .

[0044] The first partition rib 101b and the second partition rib 101c are both perpendicular to the side wall of the box body 101, and a connecting hole K is opened in the rib side walls of both. The first partition rib 101b and the second partition rib 101c form an air duct F through the connecting hole K; the first partition rib 101b is located on the supporting platform 101d of the side wall of the box body 101, and the supporting platform 101d is provided with card slots C at equal intervals, and the width of the first partition rib 101b can adapt to the setting of the card slots C.

[0045] Among them, the first partition rib 101b and the second partition rib 101c are both arranged in close contact with the side wall of the box body 101, and the partition ribs are arranged continuously and at equal intervals, which can not only keep the overall lightness of the carrying box 100, but also form a wind channel F for gas flow at the edge of the inner cavity of the box body 101. Furthermore, the distribution of the first partition rib 101b and the second partition rib 101c increases the wall thickness of the box body 101, so that when the electric vehicle is hit, the rib plate can buffer the kinetic energy and protect the battery pack; through the partition ribs, the battery pack is always contact-limited, which can maintain the original fixed installation, but effectively reduce the weight of the box body 101.

[0046] Specifically, the first partition rib 101b is located on the length side of the box body 101, extending from the opening of the box body 101 into its inner cavity, and extending to the supporting platform 101d at the lower part of its inner cavity. Corresponding to the card slot C on the supporting platform 101d, the first partition rib 101b is adaptively adapted in width, so that when the partition plate 200 is plugged in, the first partition rib 101b can form a contact limit on the partition plate 200.

[0047] The heat dissipation zone B is correspondingly divided into a water-cooled heat dissipation area and an air-cooled heat dissipation area; for water-cooled heat dissipation, specifically, the water cooling mechanism 103 includes a water-cooled box 103a, a heat sink 103b arranged in the water-cooled box 103a and extending to the inner cavity of the box body 101, and a water-cooled pipeline 103c connecting the water-cooled box 103a; the heat sink 103b is arranged in several groups and distributed at equal intervals; the two ends of the length side of the water-cooled box 103a are in contact with the second partition rib 101c, and the two ends of the width side are connected to the support platform 101d.

[0048] The water cooling box 103a is a box-type structure, fixed on the inner cavity side wall of the box body 101, and located in the lower half of the inner cavity of the box body 101, with cooling medium flowing inside; its overall length is less than the inner cavity length of the box body 101, so there is a channel formed by partition ribs between the two ends of the water cooling box 103a and the inner cavity of the box body 101, so that the upper and lower areas of the inner cavity of the box body 101 remain connected. The heat sink 103b has multiple groups, which are distributed in an array. Its evaporation end is located in the bearing area A to absorb the heat generated in the battery pack, and the condensation end is located inside the water cooling box 103a and extends to the area of ​​the air cooling mechanism 104 to quickly guide the heat dissipation; the water cooling pipeline 103c is used for the circulation of the cooling medium in the water cooling box 103a to take away the heat at the condensation end and cool the battery pack.

[0049] Specifically, the heat sink 103b includes a contact block 103b-1, a heat pipe 103b-2 and a heat sink fin 103b-3.

[0050] The contact block 103b-1 is embedded in the upper side wall of the water cooling box 103a and extends into the inner cavity of the box body 101. One end of the heat pipe 103b-2 is embedded in the contact block 103b-1 and the other end extends into the water cooling box 103a and is connected to a plurality of groups of heat dissipation fins 103b-3.

[0051] A plugging slot S is formed on the top surface of the contact block 103 b - 1 , and the heat pipe 103 b - 2 is located in the plugging slot S, and the plugging slot S corresponds to the card slot C.

[0052] The heat pipe 103b-2 is located at one end of the heat dissipation fin 103b-3 and extends to at least two branch pipes; the end of the heat dissipation fin 103b-3 away from the heat pipe 103b-2 penetrates the bottom side wall of the water cooling box 103a and extends to the air cooling cavity of the heat dissipation area B.

[0053] The water cooling pipeline 103c includes an inlet pipe 103c-1 and an outlet pipe 103c-2 communicated with the water cooling box 103a, and a circulation pump 103c-3 connected to the inlet pipe 103c-1 or the outlet pipe 103c-2; the inlet pipe 103c-1 and the outlet pipe 103c-2 are distributed at relative corners of the water cooling box 103a.

[0054] The water-cooling pipeline 103c is used to pump a cooling medium into the water-cooling box 103a. The cooling medium flows into and out of the water-cooling box 103a through the water inlet pipe 103c-1 and the water outlet pipe 103c-2. As the cooling medium flows, the heat in the water-cooling box 103a is taken away. The cooling medium is driven by the circulating pump 103c-3 and then circulates between an external container (not shown in the figure) and the water-cooling box 103a. The purpose of the diagonal distribution of the water inlet pipe 103c-1 and the water outlet pipe 103c-2 is to extend the flow path of the cooling medium in the water-cooling box 103a and increase the heat exchange time.

[0055] Among them, the heat sink 103b is a heat pipe type radiator structure, the difference is that the "base" of the radiator extends on the surface of the water cooling box 103a as a contact block 103b-1, and cooperates with the partition plate 200 to extract heat from the battery pack. The plug-in slot S set on the top of the contact block 103b-1 facilitates the plugging of the partition plate 200, and is also used to keep the bottom of the partition plate 200 in contact with the side wall of the evaporation end of the heat pipe 103b-2 for better heat conduction.

[0056] The heat pipe 103b-2 has multiple branches as the condensation end to promote rapid heat dissipation at the condensation end. It should be noted that its multiple branches are distributed at different heights in the water cooling box 103a to fully contact the flowing cooling medium at different heights to enhance the heat release effect of the condensation end.

[0057] The heat dissipation fins 103b-3 are distributed perpendicularly to the extension direction of the heat pipes 103b-2, or are distributed at a certain angle. The heat dissipation fin 103b-3 array has many groups, and the fins are parallel to each other. It should be noted that each heat pipe 103b-2 corresponds to a group of heat dissipation fins 103b-3 in the array, and the groups of heat dissipation fins 103b-3 are not connected or contacted with each other, and can be distributed in parallel and staggered, and are all submerged in the cooling medium.

[0058] Furthermore, the top of the heat dissipation fin 103b-3 is connected to or in contact with the top side wall of the inner cavity of the water-cooled box 103a, and the lower part thereof penetrates the bottom side wall of the water-cooled box 103a. The heat dissipation fin 103b-3 can support the water-cooled box 103a, and the water-cooled box 103a and the air-cooled cavity at the bottom can be used to rigidly buffer the impact of the battery pack in the vertical direction. The portion of the heat dissipation fin 103b-3 in the water-cooled box 103a is cooled by the water cooling cycle, while the portion of the heat dissipation fin 103b-3 located in the cavity of the air-cooled mechanism 104 is cooled by air cooling. The double heat dissipation can quickly take away the heat from the condensation end of the fin. The portion of the heat dissipation fin 103b-3 located in the cavity of the air-cooled mechanism 104 has its fins adapted to the distribution of the fan of the air-cooled mechanism 104, which will not be elaborated on here.

[0059] The air cooling mechanism 104 includes at least one heat dissipation fan 104a, which is installed at the fan hole 101a. The heat dissipation fan 104a is used to form airflow to remove the heat in the box 101. It should be noted that the power of the heat dissipation fan 104a is adjustable to achieve different air cooling effects.

[0060] In summary, combined with the Figures 1 to 8 As shown in , the implementation method of the heat dissipation structure is: assemble the carrying box 100, place the corresponding battery packs in the carrying area A in the box body 101 according to the area, and keep the adjacent battery packs separated by the partition plate 200; it should also be noted that a temperature sensor is also provided in the inner cavity of the box body 101, which is used to monitor the temperature value in the box and is connected to the vehicle-mounted control system of the car, and the cooling fan 104a and the circulating pump 103c-3 are electrically connected to the vehicle-mounted control system; this is a general technology and will not be described in detail.

[0061] Under normal circumstances, when the temperature inside the carrying box 100 is measured to be low, natural cooling is used to dissipate heat for the battery pack, and the air flow channel is as follows: external air enters the box through the cooling fan 104a and the air inlet 102a, flows through the air passages between the partition ribs and between the interlayers J, and takes away the heat in the box; and the partition plate 200 in contact with the battery pack disperses the heat to the cooling medium and the air environment in the box through the heat pipe 103b-2 and the cooling fins 103b-3 at the bottom.

[0062] When the temperature in the carrying box 100 rises and air cooling or water cooling needs to be started, the control system controls the intervention of air cooling or water cooling. When air cooling is started, the heat dissipation fan 104a is turned on to extract the air in the box and discharge it outside the box, and the external normal temperature air is forced into the box and passes through the air passages of various parts in the box 101 to take away the heat, and the fins extending in the air cooling cavity are cooled to take away the heat.

[0063] When water cooling is turned on, the circulation pump 103c-3 is started to circulate the cooling medium in the water cooling box 103a, continuously and quickly taking away the heat from the heat dissipation fins 103b-3 and the condensation end of the heat pipe 103b-2. Air cooling and water cooling can be turned on separately or simultaneously to meet different heat dissipation requirements.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A multi-layer heat dissipation structure for a battery pack, characterized in that: include, A carrying box (100) comprising a box body (101) and a matching box cover (102), wherein the inner cavity of the box body (101) is divided from top to bottom into a carrying area (A) and a heat dissipation area (B); the heat dissipation area (B) is provided with a water cooling mechanism (103) and an air cooling mechanism (104), and the air cooling mechanism (104) is located below the water cooling mechanism (103); The bottom side wall of the box body (101) is provided with a through fan hole (101a); A plurality of groups of first partition ribs (101b) and second partition ribs (101c) are arranged on the inner cavity side wall of the box body (101), wherein the first partition ribs (101b) are located on the inner cavity length side of the box body (101), and the second partition ribs (101c) are located on the inner cavity width side of the box body (101); The box cover (102) is provided with an air inlet (102a); The first partition rib (101b) and the second partition rib (101c) are both perpendicular to the side wall of the box body (101), and a connecting hole (K) is provided in the rib side walls of both ribs, and the first partition rib (101b) and the second partition rib (101c) form an air duct (F) through the connecting hole (K); The first partition rib (101b) is located on a support platform (101d) on a side wall of the box body (101), and the support platform (101d) is provided with card slots (C) at equal intervals, and the width of the first partition rib (101b) can adapt to the arrangement of the card slots (C); The water cooling mechanism (103) comprises a water cooling box (103a), a heat sink (103b) disposed in the water cooling box (103a) and extending into the inner cavity of the box body (101), and a water cooling pipeline (103c) connected to the water cooling box (103a); the heat sink (103b) is provided in a plurality of groups and is distributed at equal intervals; both ends of the length side of the water cooling box (103a) are in contact with the second partition rib (101c), and both ends of the width side are connected to the support platform (101d); The heat sink (103b) comprises a contact block (103b-1), a heat pipe (103b-2) and heat dissipation fins (103b-3); the contact block (103b-1) is embedded in the upper side wall of the water cooling box (103a) and extends into the inner cavity of the box body (101); one end of the heat pipe (103b-2) is embedded in the contact block (103b-1) and the other end extends into the water cooling box (103a) and is connected to a plurality of groups of heat dissipation fins (103b-3); The top surface of the contact block (103b-1) is provided with a plug-in slot (S), the heat pipe (103b-2) is located in the plug-in slot (S), and the plug-in slot (S) corresponds to the card slot (C); The heat pipe (103b-2) is located at one end of the heat dissipation fin (103b-3) and has no less than two branch pipes extending therefrom; One end of the heat dissipation fin (103b-3) away from the heat pipe (103b-2) penetrates the bottom side wall of the water cooling box (103a) and extends to the air cooling cavity of the heat dissipation area (B); The water cooling pipeline (103c) comprises a water inlet pipe (103c-1) and a water outlet pipe (103c-2) communicated with the water cooling box (103a), and a circulation pump (103c-3) connected to the water inlet pipe (103c-1) or the water outlet pipe (103c-2); the water inlet pipe (103c-1) and the water outlet pipe (103c-2) are distributed at relative angles of the water cooling box (103a); The partition plates (200) are provided in a plurality of groups and are plugged into the top side wall of the water cooling mechanism (103) and are limited to the edge side wall of the box body (101); The partition plate (200) is divided into a lower plug-in block (201) and an upper heat-conducting clamping plate (202); the heat-conducting clamping plate (202) has an interlayer (J) inside, and the interlayer (J) is in communication with the air duct (F).

2. The multi-layer heat dissipation structure for a battery pack according to claim 1, characterized in that: The air cooling mechanism (104) comprises at least one heat dissipation fan (104a), and the heat dissipation fan (104a) is installed at the fan hole (101a).

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