Heat exchange structure for battery pack and battery pack

Abstract

The utility model provides a heat exchange structure for a battery pack and a battery pack, the heat exchange structure comprising: a liquid cooling part, used to exchange heat with the battery cell module in the battery pack and transfer heat to the outside of the battery pack; a fuse assembly, connected to the liquid cooling part, the fuse assembly comprising: a fuse, the fuse having a heat exchange surface facing the liquid cooling part, an insulating heat conductive layer is provided between the heat exchange surface and the liquid cooling part, the fuse abuts against the liquid cooling part through the insulating heat conductive layer and exchanges heat. The heat exchange structure for a battery pack of the utility model improves the heat exchange efficiency of the fuse by providing a heat exchange surface on the fuse, and providing an insulating heat conductive layer between the heat exchange surface and the liquid cooling part, so that the fuse abuts against the liquid cooling part through the insulating heat conductive layer and exchanges heat, which is beneficial to the temperature difference control of the entire battery pack.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a heat exchange structure for a battery pack and a battery pack. Background Art

[0002] A fuse is a current protector that is commonly installed in battery packs as a short circuit and overcurrent protector. As the voltage of battery packs increases, the charge and discharge currents also increase, and the voltage and current of the fuses that protect the battery packs are also increasing.

[0003] Accompanied by high current charging and discharging, the fuse will generate high temperature during normal operation. The heat generated by the fuse is continuously transferred to the surroundings, causing the temperature inside the battery pack to continue to rise, resulting in abnormal temperatures at the overall level of the battery module and electrical connectors, affecting the overall temperature difference control of the battery pack. Utility Model Content

[0004] The utility model aims to at least solve the problem in the prior art that the existing fuse has poor heat dissipation effect and affects the overall temperature difference control of the battery pack, and proposes a heat exchange structure for a battery pack and a battery pack.

[0005] In order to achieve the purpose of the utility model, a heat exchange structure for a battery pack is provided, comprising: a liquid cooling part, used for exchanging heat with a cell module in the battery pack and transferring heat to the outside of the battery pack; a fuse assembly, connected to the liquid cooling part, the fuse assembly comprising: a fuse, the fuse having a heat exchange surface facing the liquid cooling part, an insulating heat conductive layer being arranged between the heat exchange surface and the liquid cooling part, the fuse abutting against the liquid cooling part through the insulating heat conductive layer and exchanging heat.

[0006] In an optional embodiment, the fuse assembly further includes: a mounting seat fixedly connected to the liquid cooling part, and the fuse is detachably connected to the mounting seat.

[0007] In an optional embodiment, the mounting base includes: a connecting plate fixedly connected to the liquid cooling part, the connecting plate being provided with a through avoidance opening in the thickness direction, the insulating heat-conductive layer being located in the avoidance opening; an insulating column connected to the connecting plate, the fuse being detachably connected to the insulating column.

[0008] In an optional embodiment, the avoidance opening and the corresponding surface of the liquid cooling portion form a limiting groove for limiting the insulating heat-conducting layer.

[0009] In an optional embodiment, the insulating column is detachably connected to the connecting plate.

[0010] In an optional embodiment, there are two insulating columns, the two insulating columns are arranged at an interval, and the avoidance is located between the two insulating columns.

[0011] In an optional embodiment, the fuse includes: a fuse body, which is arranged between the two insulating columns, and the heat exchange surface is arranged on the fuse body; two contacts, which are arranged at both ends of the fuse body and correspond one-to-one to the positions of the insulating columns, and each of the contacts is detachably connected to the insulating column.

[0012] In an optional embodiment, the fuse assembly further comprises: a protective cover (23), which is disposed on the fuse and is detachably connected to the fuse.

[0013] In an optional embodiment, the liquid cooling part includes a liquid cooling plate, which has a liquid inlet, a liquid outlet, a liquid separation cavity and a plurality of heat exchange channels; the liquid separation cavity is connected to the liquid inlet, and the plurality of heat exchange channels are arranged in parallel, the liquid inlet end of each heat exchange channel is connected to the liquid separation cavity, and the liquid outlet end of each heat exchange channel is connected to the liquid outlet, and the abutment position between the heat exchange surface and the liquid cooling plate corresponds to the position of the liquid separation cavity.

[0014] In an optional embodiment, the protective cover includes: a cover body, which has a first limiting portion on the side facing the contact, the first limiting portion being used to cooperate with the mounting bolts provided on the contact to limit the displacement of the cover body in a direction parallel to the heat exchange surface; a plurality of clips connected to the cover body, the clips being used to engage with the contacts to fix the cover body in a direction perpendicular to the heat exchange surface.

[0015] In an optional embodiment, the protective cover further includes: a side plate, wherein there are two side plates, the two side plates are arranged in parallel, the cover body, the fuse and the mounting seat are located between the two side plates, and the two side plates are connected to the cover body.

[0016] According to a second aspect of the present utility model, a battery pack is also disclosed, comprising:

[0017] The above heat exchange structure.

[0018] The heat exchange structure for a battery pack of the utility model provides a heat exchange surface on the fuse, and an insulating heat-conducting layer is provided between the heat exchange surface and the liquid cooling part, so that the fuse abuts against the liquid cooling part and exchanges heat through the insulating heat-conducting layer, thereby improving the heat exchange efficiency of the fuse. The heat generated when the fuse works normally is directly transferred to the liquid cooling part, and the heat is transferred to the outside of the battery pack through the liquid cooling part, thereby avoiding the accumulation of heat generated when the fuse works normally in the battery pack, thereby reducing the temperature difference interference of the connecting copper bus, the electrical connector, and the module total level caused by the high temperature generated during the operation of the fuse, which is beneficial to the temperature difference control of the entire battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the heat exchange structure of an embodiment of the utility model;

[0020] Figure 2 This is a structural schematic diagram of a connecting plate of a heat exchange structure according to an embodiment of the utility model;

[0021] Figure 3 for Figure 2 AA section view of the middle connecting plate;

[0022] Figure 4 It is a schematic diagram of the assembly of the connecting plate and the liquid cooling part of the heat exchange structure of the embodiment of the utility model;

[0023] Figure 5 A side view of the heat exchange structure of an embodiment of the utility model;

[0024] Figure 6 This is a schematic structural diagram of the liquid cooling portion of the heat exchange structure of an embodiment of the utility model;

[0025] Figure 7 This is a schematic structural diagram of a heat exchange structure in another embodiment of the utility model;

[0026] Figure 8 A schematic structural diagram of a protective cover of a heat exchange structure according to another embodiment of the utility model;

[0027] Fig. 9 A side view of a fuse assembly of a heat exchange structure according to another embodiment of the utility model;

[0028] Fig.10 A cross-sectional view of a fuse assembly of a heat exchange structure according to another embodiment of the utility model;

[0029] List of reference numerals:

[0030] 10. Liquid cooling unit; 11. Liquid inlet; 12. Liquid outlet; 13. Liquid separation chamber; 14. Heat exchange flow channel; 20. Fuse assembly; 21. Fuse; 211. Heat exchange surface; 212. Fuse body; 213. Contact; 22. Mounting seat; 221. Connecting plate; 222. Insulating column; 223. Avoidance; 224. Connecting bolt; 2211. Plug hole; 2212. Connecting nut; 23. Protective cover; 231. Cover body; 2311. First limiting part; 232. Buckle; 233. Side panel; 30. Insulating heat conductive layer; 40. Mounting bolt. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the heat exchange structure for a battery pack and the battery pack provided by the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] A fuse is a current protector that is commonly installed in battery packs as a short circuit and overcurrent protector. As the voltage of battery packs increases, the charge and discharge currents also increase, and the voltage and current of the fuses that protect the battery packs are also increasing.

[0033] Accompanied by high current charging and discharging, the fuse will generate high temperature during normal operation. The heat generated by the fuse is continuously transferred to the surroundings, causing the temperature inside the battery pack to continue to rise, resulting in abnormal temperatures at the overall level of the battery module and electrical connectors, affecting the temperature difference control of the entire pack.

[0034] After research, it was found that in some related technologies, the fuse is fixed to the liquid cooling plate inside the battery pack through a plastic mounting base. When the battery pack is in normal operation, the temperature generated by the fuse is about 50-70°C. At this time, the local temperature of the fuse installation position is relatively high. Since the mounting base is usually made of plastic, and the thermal conductivity of plastic is low, the fuse cannot effectively exchange heat with the liquid cooling plate, resulting in the heat of the fuse can only accumulate in the battery pack, and eventually transfer the heat to other electrical connectors of the battery pack, the battery module overall level and its area, causing the temperature of the battery and electrical connectors to rise, resulting in an increase in the temperature difference on the battery surface, exceeding the input parameters of the temperature difference during the design input, and making it difficult to control the temperature of the entire package.

[0035] Increase

[0036] In order to solve the above problems, Figure 1As shown, an embodiment of the utility model discloses a heat exchange structure for a battery pack, including: a liquid cooling part 10 and a fuse assembly 20. Among them, the liquid cooling part 10 is used to exchange heat with the battery cell module in the battery pack and transfer the heat to the outside of the battery pack. The fuse assembly 20 is connected to the liquid cooling part 10, and the fuse assembly 20 includes: a fuse 21, the fuse 21 has a heat exchange surface 211 facing the liquid cooling part 10, and the heat exchange surface 211 abuts and exchanges heat with the liquid cooling part 10. When in use, since the heat exchange surface 211 of the fuse 21 abuts and exchanges heat with the liquid cooling part 10, the heat generated by the fuse 21 during normal operation can be directly transferred to the liquid cooling part 10, and the heat is transferred to the outside of the battery pack through the liquid cooling part 10, so as to avoid the heat generated by the fuse 21 during normal operation from accumulating in the battery pack.

[0037] The heat exchange structure for a battery pack of the utility model is provided with a heat exchange surface 211 on the fuse 21, and an insulating heat-conducting layer 30 is provided between the heat exchange surface 211 and the liquid cooling part 10, so that the fuse 21 abuts against the liquid cooling part 10 through the insulating heat-conducting layer 30 and exchanges heat, thereby improving the heat exchange efficiency of the fuse 21. The heat generated by the fuse 21 during normal operation is directly transferred to the liquid cooling part 10, and the heat is transferred to the outside of the battery pack through the liquid cooling part 10, thereby avoiding the accumulation of heat generated by the fuse 21 during normal operation in the battery pack, thereby reducing the temperature difference interference of the connecting copper bus, the electrical connector, and the module total level caused by the high temperature generated during the operation of the fuse 21, which is beneficial to the temperature difference control of the entire battery pack.

[0038] It should be noted that in this embodiment, the liquid cooling unit 10 is a liquid cooling plate. However, this is not restrictive. In some other embodiments not shown in the figure, the liquid cooling unit 10 can also be a heat sink that dissipates heat through air cooling, or the shell of the battery pack. Under the premise of not violating the concept and principle of the invention, as long as the structure can exchange heat with the fuse 21 and transfer heat to the outside of the battery pack, it is within the protection scope of the utility model.

[0039] It is understandable that during the use of the fuse 21, current passes through the fuse 21, and usually, the liquid cooling part 10 is made of metal to ensure heat transfer efficiency. By providing an insulating heat-conducting layer 30 between the heat exchange surface 211 and the liquid cooling part 10, it is also possible to prevent the current on the fuse 21 from being transferred to the liquid cooling part 10 to cause leakage. By providing the insulating heat-conducting layer 30, while achieving heat transfer between the two and ensuring the heat dissipation effect of the fuse 21, the insulation between the fuse 21 and the liquid cooling part 10 is also ensured, thereby improving safety.

[0040] It should be noted that, in this embodiment, the insulating heat-conducting layer 30 uses a heat-conducting adhesive, which is a single-component, heat-conducting, room-temperature curing silicone adhesive sealant. The low molecular weight is released through the condensation reaction of the water in the air to cause cross-linking and curing, and vulcanized into a high-performance elastomer. The good-adhesive heat-conducting adhesive has excellent resistance to cold and hot alternation, aging resistance and electrical insulation performance. It also has excellent moisture resistance, shock resistance, corona resistance, leakage resistance and chemical medium resistance. It can be used continuously at -60 to 280°C and maintain performance. It does not swell and has good adhesion to most metal and non-metal materials. By using the heat-conducting adhesive, since the heat-conducting adhesive has good insulation properties, the insulation between the fuse 21 and the liquid cooling part 10 can be achieved. At the same time, since the heat-conducting adhesive has good fluidity before curing, it can be evenly distributed between the heat exchange surface 211 of the fuse 21 and the liquid cooling part 10, and can also be filled in the gap between the heat exchange surface 211 and the liquid cooling part 10, thereby improving the efficiency of heat transfer.

[0041] like Figure 1 As shown, the fuse assembly 20 further includes: a mounting seat 22, the mounting seat 22 is fixedly connected to the liquid cooling unit 10, and the fuse 21 is detachably connected to the mounting seat 22. By providing the mounting seat 22, the fuse 21 can be fixedly connected to the liquid cooling unit 10 through the mounting seat 22, thereby achieving reliable fixation. At the same time, since the fuse 21 and the mounting seat 22 are detachably connected, after the fuse 21 is blown, the replacement of the fuse 21 is more convenient.

[0042] The following is combined with specific Figures 1 to 5 The structure of the fuse assembly 20 is described in detail:

[0043] like Figure 1 As shown, the mounting base 22 includes: a connecting plate 221 and an insulating column 222. The connecting plate 221 is fixedly connected to the liquid cooling unit 10, and the connecting plate 221 is provided with a through avoidance opening 223 in the thickness direction, and the insulating heat-conducting layer 30 is located in the avoidance opening 223; the insulating column 222 is connected to the connecting plate 221, and the fuse 21 is detachably connected to the insulating column 222. By providing the insulating column 222 on the connecting plate 221, the fuse 21 is fixedly connected to the connecting plate 221 through the insulating column 222, which facilitates installation and replacement while ensuring insulation. In addition, as Figure 2 and Figure 3 As shown, by providing a relief opening 223 in the thickness direction of the connecting plate 221, during assembly, the thermal conductive adhesive can be coated on the surface of the liquid cooling part 10 through the relief opening 223 to form an insulating thermal conductive layer 30, making the operation more convenient.

[0044] It should be noted that, in the present embodiment, the connection plate 221 and the liquid cooling part 10 are fixed by welding, but this is not restrictive. In some other embodiments not shown in the figure, the connection plate 221 and the liquid cooling part 10 may be fixed by clamping, riveting, threading, etc. Without violating the concept and principle of the invention, any method that can achieve fixed connection between the connection plate 221 and the liquid cooling part 10 is within the protection scope of the present utility model.

[0045] like Figure 3 As shown, the avoidance opening 223 and the corresponding surface of the liquid cooling part 10 form a limiting groove for limiting the insulating heat conductive layer 30. Since the thermal conductive adhesive has fluidity before solidification, by forming the limiting groove with the avoidance opening 223 and the surface of the liquid cooling part 10, the position of the thermal conductive adhesive before solidification can be limited to prevent the thermal conductive adhesive from flowing around before solidification, so that the setting position of the insulating heat conductive layer 30 is more controllable.

[0046] like Figure 1 As shown, the insulating column 222 is detachably connected to the connecting plate 221. The insulating column 222 has a first end and a second end. The first end of the insulating column 222 is provided with a connecting bolt 224, and the second end of the insulating column 222 is provided with a screw hole, which is a blind hole. Figure 3 As shown, the connecting plate 221 is provided with a plug hole 2211, the connecting bolt 224 is plugged into the plug hole 2211 and fixedly connected to the connecting plate 221, and the insulating column 222 is detachably connected to the connecting plate 221 through the connecting bolt 224. During assembly, the first end of the insulating column 222 is detachably connected to the connecting plate 221 through the connecting bolt 224; the fuse 21 is threadedly connected to the screw hole at the second end of the insulating column 222 through the mounting bolt 40, so as to realize the detachable connection between the fuse 21 and the insulating column 222.

[0047] like Figure 2 and Figure 3 As shown, in this embodiment, there are two plug-in holes 2211, the two plug-in holes 2211 are arranged at intervals, and the avoidance opening 223 is located between the two plug-in holes 2211. Correspondingly, there are two insulating columns 222, and a connecting bolt 224 is provided at the first end of each insulating column 222, that is, the two insulating columns 222 are arranged at intervals, and the avoidance opening 223 is located between the two insulating columns 222.

[0048] like Figure 1As shown, the fuse 21 includes: a fuse body 212 and two contacts 213. The fuse body 212 is arranged between two insulating columns 222. The fuse body 212 is provided with a heat exchange surface 211. The two contacts 213 are arranged at both ends of the fuse body 212 and correspond to the positions of the insulating columns 222 one by one. Each contact 213 is detachably connected to the insulating column 222. A connecting hole is provided on each contact 213, and the connecting hole corresponds to the screw hole at the second end of the insulating column 222. The mounting bolt 40 is passed through the connecting hole and is threadedly connected to the screw hole at the second end of the insulating column 222, so that the contact 213 is connected and fixed to the insulating column 222.

[0049] When assembling, Figure 4 As shown, first fix the connecting plate 221 on the liquid cooling part 10, spray the thermal conductive glue in the avoidance opening 223 to form the insulating heat conductive layer 30, then install the insulating column 222 on the connecting plate 221, and finally install the fuse 21, press the heat exchange surface 211 on the fuse body 212 onto the insulating heat conductive layer 30, so that the heat exchange surface 211 and the insulating heat conductive layer 30, and the liquid cooling part 10 and the insulating heat conductive layer 30 are in full contact to ensure the efficiency of heat transfer, and finally connect and fix the contact 213 and the corresponding insulating column 222 by installing the bolt 40 to complete the installation.

[0050] In this embodiment, since the insulating column 222 is detachably connected to the mounting plate, the insulating columns 222 of different heights can be replaced according to the size of the fuse 21 to ensure sufficient contact between the fuse 21 and the insulating thermal conductive layer 30 .

[0051] It should be noted that the connecting bolts 224 and the connecting plate 221 can be fixed by direct welding, or by Figure 3 and Figure 5 As shown, a connecting nut 2212 is arranged between the connecting plate 221 and the liquid cooling part 10, the connecting nut 2212 corresponds to the position of the plug hole 2211, and the connecting nut 2212 is welded and fixed to the connecting plate 221, and the first end of the connecting bolt 224 is threadedly connected to the connecting nut 2212 to realize the fixed connection between the connecting bolt 224 and the connecting plate 221.

[0052] like Figure 6 As shown, in the present embodiment, the liquid cooling part 10 includes a liquid cooling plate, and the liquid cooling part 10 has a liquid inlet 11, a liquid outlet 12, a liquid separation cavity 13 and a plurality of heat exchange channels 14; the liquid separation cavity 13 is connected to the liquid inlet 11, and the plurality of heat exchange channels 14 are arranged in parallel, the liquid inlet end of each heat exchange channel 14 is connected to the liquid separation cavity 13, and the liquid outlet end of each heat exchange channel 14 is connected to the liquid outlet 12, and the abutment position of the heat exchange surface 211 and the liquid cooling part 10 corresponds to the position of the liquid separation cavity 13.

[0053] That is, the position where the fuse 21 exchanges heat with the liquid cooling plate is located above the liquid separation cavity 13. After the refrigerant enters the liquid cooling plate through the liquid inlet 11, it first enters the liquid separation cavity 13, and then flows into each heat exchange flow channel 14 through the liquid separation cavity 13. In other words, there is a large amount of low-temperature refrigerant at the location of the fuse 21, so this area has the best cooling effect on the fuse 21.

[0054] like Figure 7 Another embodiment of the utility model shown in the figure also discloses a heat exchange structure, and its structure is basically the same as that of the above embodiment, except that, in the other embodiment, the fuse assembly 20 further includes: a protective cover 23, which is provided on the fuse 21 and is detachably connected to the fuse 21. By providing the protective cover 23, the fuse 21 can be protected to improve the reliability of the operation of the fuse 21.

[0055] like Figure 8 As shown, the protective cover 23 includes: a cover body 231, a buckle 232 and a side plate 233. A first limiting portion 2311 is provided on the side of the cover body 231 facing the contact 213. The first limiting portion 2311 is used to limit the position of the mounting bolt 40 on the contact 213 to limit the displacement of the cover body 231 in the direction parallel to the heat exchange surface 211. Figure 8 and Fig.10 As shown, the first limiting portion 2311 is a limiting groove set on the cover body 231, and the position of the limiting groove corresponds to the position of the mounting bolt 40. When the protective cover 23 is set on the fuse 21, the nut of the mounting bolt 40 is located in the limiting groove, thereby forming a limiting fit to limit the displacement of the cover body 231 in the direction parallel to the heat exchange surface 211.

[0056] It should be noted that, in the present embodiment, the first limiting portion 2311 is a limiting groove surrounded by an annular protrusion on the cover body 231, but this is not restrictive. In some other embodiments not shown in the figure, the first limiting portion 2311 can also be other limiting structures, such as a buckle 232, a limiting protrusion, etc. As long as it is a movable structure that can be limited and matched with the mounting bolt 40, it is within the protection scope of the present utility model.

[0057] like Figure 8 and Fig. 9 As shown, there are four clips 232, which are divided into two pairs. The two pairs of clips 232 are respectively connected to the two ends of the cover body 231. The same pair of clips 232 are relatively arranged to form a clipping space for engaging with the contact 213. The contact 213 is located in the clipping space. Each clip 232 has a clipping protrusion. Each clip 232 is clipped with the contact 213 through the clipping protrusion to fix the cover body 231 in the direction perpendicular to the heat exchange surface 211.

[0058] like Figure 8As shown, the protective cover 23 further includes: a side plate 233, two side plates 233, the two side plates 233 are arranged in parallel, the cover body 231, the fuse and the mounting seat are located between the two side plates 233, and the two side plates 233 are connected to the cover body 231. By providing the side plates 233, the fuse 21 and the mounting seat can be protected between the two side plates 233 to prevent the fuse 21 and the mounting seat from being damaged by collision.

[0059] According to the second aspect of the utility model, a battery pack is also disclosed, comprising: a battery cell module, a cover and the above-mentioned heat exchange structure. Among them, the fuse assembly 20 is located inside the battery pack, and the liquid cooling part 10 is a cold liquid plate. The battery cell module is installed on the cold liquid plate and is cooled by heat exchange on the cold liquid plate. The cover is buckled on the cold liquid plate and together with the cold liquid plate, it forms the outer shell of the battery pack.

[0060] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A heat exchange structure for a battery pack, characterized in that: include: A liquid cooling unit (10) for exchanging heat with the battery cell modules in the battery pack and transferring heat to the outside of the battery pack; A fuse assembly (20) is connected to the liquid cooling part (10), and the fuse assembly (20) comprises: a fuse (21), and the fuse (21) has a heat exchange surface (211) facing the liquid cooling part (10); An insulating heat-conducting layer (30) is provided between the heat exchange surface (211) and the liquid cooling part (10), and the fuse (21) abuts against the liquid cooling part (10) through the insulating heat-conducting layer (30) to exchange heat.

2. The heat exchange structure according to claim 1, characterized in that: The liquid cooling part (10) comprises a liquid cooling plate, wherein the liquid cooling plate has a liquid inlet (11), a liquid outlet (12), a liquid separation cavity (13) and a plurality of heat exchange channels (14); The liquid separation chamber (13) is connected to the liquid inlet (11), and the plurality of heat exchange channels (14) are arranged in parallel. The liquid inlet end of each heat exchange channel (14) is connected to the liquid separation chamber (13), and the liquid outlet end of each heat exchange channel (14) is connected to the liquid outlet (12). The abutment position between the heat exchange surface (211) and the liquid cooling plate corresponds to the position of the liquid separation chamber (13).

3. The heat exchange structure according to claim 1, characterized in that: The fuse assembly (20) further comprises: The mounting seat (22) is fixedly connected to the liquid cooling part (10), and the fuse (21) is detachably connected to the mounting seat (22).

4. The heat exchange structure according to claim 3, characterized in that: The mounting seat (22) comprises: A connecting plate (221) fixedly connected to the liquid cooling part (10), the connecting plate (221) being provided with a through-hole (223) in the thickness direction, the insulating heat-conducting layer (30) being located in the through-hole (223); An insulating column (222) is connected to the connecting plate (221), and the fuse (21) is detachably connected to the insulating column (222).

5. The heat exchange structure according to claim 4, characterized in that: The avoidance opening (223) and the corresponding surface of the liquid cooling portion (10) form a limiting groove for limiting the insulating heat-conducting layer (30).

6. The heat exchange structure according to claim 4, characterized in that: The insulating column (222) is detachably connected to the connecting plate (221).

7. The heat exchange structure according to claim 4, characterized in that: There are two insulating columns (222), the two insulating columns (222) are arranged at an interval, and the avoidance opening (223) is located between the two insulating columns (222).

8. The heat exchange structure according to claim 7, characterized in that: The fuse (21) comprises: A fuse body (212) is arranged between the two insulating columns (222), and the heat exchange surface (211) is arranged on the fuse body (212); Two contacts (213) are arranged at two ends of the fuse body (212) and correspond one-to-one to the positions of the insulating columns (222); each of the contacts (213) is detachably connected to the insulating column (222).

9. The heat exchange structure according to claim 8, characterized in that: The fuse assembly (20) further comprises: A protective cover (23) is disposed on the fuse (21) and is detachably connected to the fuse (21).

10. The heat exchange structure according to claim 9, characterized in that: The protective cover (23) comprises: The cover body (231) is provided with a first limiting portion (2311) on a side facing the contact (213), and the first limiting portion (2311) is used to cooperate with a mounting bolt (40) provided on the contact (213) to limit the displacement of the cover body (231) in a direction parallel to the heat exchange surface (211); A plurality of buckles (232) are connected to the cover body (231), and the buckles (232) are used to engage with the contacts (213) so as to fix the cover body (231) in a direction perpendicular to the heat exchange surface (211).

11. The heat exchange structure according to claim 10, characterized in that: The protective cover (23) further comprises: Side plates (233), there are two side plates (233), the two side plates (233) are arranged in parallel, the cover body (231), the fuse (21) and the mounting seat (22) are located between the two side plates (233), and the two side plates (233) are connected to the cover body (231).

12. A battery pack, characterized in that: include: The heat exchange structure according to any one of claims 1 to 11.

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