Heat dissipation structure and battery pack

Abstract

The utility model relates to the technical field of batteries, and provides a heat dissipation structure and a battery pack. The heat dissipation structure is applied to the battery pack and comprises a bottom plate, a bracket, a fuse and a heat conduction piece, the support is installed on the bottom plate. The fuse is installed on the support. The heat-conducting member is mounted on the bracket. The heat conduction piece is connected between the fuse and the bottom plate. On the basis of heat conduction of the heat conduction piece, heat generated when the temperature of the fuse rises can be transmitted to the bottom plate, heat dissipation of the fuse is achieved through the route, and therefore the situation that the temperature difference between the aluminum rows is too large due to the fact that the fuse transmits the heat to the aluminum rows is prevented.

Description

Technical Field

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

[0002] In the related art, a fuse is usually installed in a battery box as a safety device to ensure electrical safety. During the operation of the battery pack, the temperature rise of the fuse can reach 60 degrees Celsius. The metal terminals on both sides of the fuse are connected to the output pole of the battery module and the MSD (Manual Service Disconnect) through copper bars. After the temperature of the fuse rises, the generated heat will be transferred to the aluminum bar of the battery module connected thereto through the copper bar. At this time, the temperature of this aluminum bar will be higher than that of the other aluminum bars, which is likely to cause too large a temperature difference between the aluminum bars and generate abnormal temperature differences, resulting in an alarm of the battery pack. Summary of the Utility Model

[0003] An embodiment of the utility model provides a heat dissipation structure and a battery pack, which can improve the technical problem of too large a temperature difference between aluminum bars caused by the temperature rise of the fuse.

[0004] In a first aspect, an embodiment of the utility model provides a heat dissipation structure, which is applied to a battery pack and includes:

[0005] A bottom plate;

[0006] A bracket, mounted on the bottom plate;

[0007] A fuse, mounted on the bracket;

[0008] A heat conducting member, connected between the fuse and the bottom plate.

[0009] In one embodiment, the heat conducting member is formed with a heat dissipation channel extending in the direction from the fuse to the bottom plate, and the heat dissipation channel is filled with a heat conducting glue layer, and the heat conducting glue layer is connected between the fuse and the bottom plate.

[0010] In one embodiment, on the side close to the bottom plate, a relief notch is formed on the heat conducting member, and the relief notch is configured to avoid a reinforcing member on the bottom plate.

[0011] In one embodiment, a protective cover is mounted on the bracket, the fuse is mounted in the protective cover, and the heat conducting member is constructed in the protective cover.

[0012] In one embodiment, the protective cover includes:

[0013] A mounting plate, connected to the bracket, and the fuse is mounted on the mounting plate;

[0014] Side walls, surrounding the mounting plate;

[0015] Wherein, a connection notch is formed on one side of the side wall facing the bottom plate, and the heat conducting member passes through the protective cover from the connection notch and abuts against the fuse.

[0016] In one embodiment, the side wall includes a first wall segment and a second wall segment. The first wall segment and the second wall segment are located on one side of the mounting plate close to the bottom plate. The first wall segment and the second wall segment are spaced apart to form the connection notch. Wherein, opposite sides of the heat conducting member are respectively connected to the first wall segment and the second wall segment.

[0017] In one embodiment, the side wall further includes a third wall segment. The third wall segment is located on one side of the mounting plate away from the bottom plate. The third wall segment has a first segment, a second segment and a third segment connected in sequence. The width of the first segment is D1, the width of the second segment is D2, and the width of the third segment is D3, satisfying: D3 > D1 > D2.

[0018] In one embodiment, the side wall further includes a fourth wall segment. Two ends of the fourth wall segment are respectively connected to the second wall segment and the third segment. Wherein, the width of the fourth wall segment is D4, and the width of the second wall segment is D6, satisfying: D3 > D4 and D6 > D4.

[0019] In one embodiment, the side wall further includes a fifth wall segment. Two ends of the fifth wall segment are respectively connected to the first wall segment and the first segment. The width of the fifth wall segment is D5, satisfying: D5 > D1.

[0020] In a second aspect, an embodiment of the present invention provides a battery pack, including the heat dissipation structure as described above.

[0021] Beneficial effects of the embodiments of the present invention:

[0022] In the embodiments of the present invention, the fuse and the heat conducting member are installed through a bracket, and the heat conducting member is connected between the fuse and the bottom plate. Based on the heat conduction of the heat conducting member, the heat generated when the temperature of the fuse rises can be transferred to the bottom plate, so as to realize the heat dissipation of the fuse through this route, thereby preventing the fuse from transferring heat to the aluminum busbar and causing too large a temperature difference between the aluminum busbars. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 is one of the partial perspective views of the battery pack provided by the embodiment of the present utility model;

[0025] Figure 2 is the second of the partial perspective views of the battery pack provided by the embodiment of the present utility model;

[0026] Figure 3 is the perspective view of the heat dissipation structure provided by the embodiment of the present utility model;

[0027] Figure 4 is the perspective view of the bracket provided by the embodiment of the present utility model;

[0028] Figure 5 is the first of the perspective views of the protective cover provided by the embodiment of the present utility model;

[0029] Figure 6 is the second of the perspective views of the protective cover provided by the embodiment of the present utility model.

[0030] Reference numerals:

[0031] 10 - bottom plate, 20 - bracket, 210 - first mounting position, 220 - second mounting position, 230 - third mounting position, 240 - first connecting column, 250 - second connecting column, 260 - third connecting column, 270 - weight reduction notch, 280 - first bending portion, 2810 - first connecting hole, 290 - second bending portion, 2910 - second connecting hole, 21 - near side, 22 - far side, 221 - first straight section, 222 - first inclined section, 223 - second straight section, 224 - second inclined section, 225 - third straight section, 30 - fuse, 310 - first connecting piece, 40 - heat conducting piece, 410 - heat dissipation channel, 420 - relief notch, 50 - reinforcing piece, 60 - protective cover, 610 - mounting plate, 620 - side wall, 630 - first wall section, 640 - second wall section, 650 - third wall section, 6510 - first section, 6520 - second section, 6530 - third section, 660 - fourth wall section, 670 - fifth wall section, 70 - front panel, 710 - fire sprinkler. Detailed implementation manners

[0032] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model. In the present utility model, unless otherwise stated, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the drawings; while "inner" and "outer" refer to the outline of the device.

[0033] As Figures 1 to 6 shown, an embodiment of the present utility model provides a heat dissipation structure. This heat dissipation structure is applied to a battery pack. The heat dissipation structure includes a bottom plate 10, a bracket 20, a fuse 30, and a heat conducting member 40. Among them, the bracket 20 is installed on the bottom plate 10. The fuse 30 is installed on the bracket 20. The heat conducting member 40 is connected between the fuse 30 and the bottom plate 10.

[0034] In some embodiments, the fuse 30 and the heat conducting member 40 are installed through the bracket 20, and the heat conducting member 40 is connected between the fuse 30 and the bottom plate 10. Based on the heat conduction of the heat conducting member 40, the heat generated when the temperature of the fuse 30 rises can be transferred to the bottom plate 10, so as to realize the heat dissipation of the fuse 30 through this route, thereby preventing the fuse 30 from transferring heat to the aluminum busbar and causing too large a temperature difference between the aluminum busbars.

[0035] Among them, the bottom plate 10 is the lower box body structure of the battery box, and a liquid coolant can flow inside it. That is to say, the bottom plate 10 itself serves as the liquid cooling plate of the battery pack. When the heat conducting member 40 transfers the heat of the fuse 30 to the bottom plate 10, rapid cooling can be achieved. Based on the continuous heat conduction of the heat conducting member 40, the fuse 30 can be maintained at an appropriate temperature, and the heat transferred from the fuse 30 to the copper busbar is less. At this time, only a small part of this heat is transferred from the copper busbar to the aluminum busbar of the battery module, so that the temperature rise of the aluminum busbar is small. Thus, it can be ensured that the temperature difference between each aluminum busbar is less than 3 degrees Celsius, thereby preventing the aluminum busbars in the battery pack from generating temperature differences and causing the battery pack to alarm.

[0036] The bracket 20, as a structure for installing the fuse 30 and the heat conducting member 40, can be set as a sheet metal bracket 20. It is integrally formed based on sheet metal technology.

[0037] As Figure 5As shown, in some embodiments, the heat conducting member 40 is formed with a heat dissipation channel 410 extending from the fuse 30 towards the bottom plate 10. The heat dissipation channel 410 is filled with a heat conducting adhesive layer, and the heat conducting adhesive layer is connected between the fuse 30 and the bottom plate 10.

[0038] It can be understood that the heat conducting member 40 extends along the direction from the fuse 30 to the bottom plate 10, and the inside of the heat conducting member 40 is hollow, thus forming a heat dissipation channel 410 extending from the fuse 30 towards the bottom plate 10. Based on filling the heat conducting adhesive layer in the heat dissipation channel 410, and the heat conducting adhesive layer can conduct heat to connect the fuse 30 and the bottom plate 10, then the heat generated by the fuse 30 can be transferred to the bottom plate 10 through the heat conducting adhesive layer.

[0039] The heat conducting adhesive layer can be formed by solidifying the heat conducting adhesive. After the bracket 20 is assembled to the bottom plate 10, the heat conducting adhesive can be filled into the heat dissipation channel 410. After the heat conducting adhesive solidifies, the heat conducting adhesive layer can be formed. The heat conducting adhesive layer has good heat conductivity and can transfer most of the heat generated by the fuse 30 to the bottom plate 10 for heat dissipation. Then, even if the remaining small part of the heat of the fuse 30 is transferred to the aluminum busbar of the battery module through the copper busbar, it will not cause a significant temperature rise of the aluminum busbar, and the temperature difference between the aluminum busbars will not be greater than 3 degrees Celsius, preventing the battery pack from alarming.

[0040] Among them, the heat dissipation channel 410 can be set as a square channel, a circular channel, or an oval channel. The shape and size of the heat dissipation channel 410 can be reasonably selected based on the shape and size of the fuse 30.

[0041] As Figure 5 shown, in some embodiments, on the side close to the bottom plate 10, a relief notch 420 is formed on the heat conducting member 40, and the relief notch 420 is configured to avoid the reinforcement member 50 on the bottom plate 10.

[0042] Since a reinforcement member 50 will be constructed on the bottom plate 10 to enhance the overall structural strength of the battery box, by constructing the relief notch 420 on the heat conducting member 40, the heat conducting member 40 and the reinforcement member 50 can be made to avoid each other to prevent the reinforcement member 50 from affecting the assembly of the bracket 20.

[0043] Among them, the reinforcement member 50 is usually a square structure extending along the length direction of the bottom plate 10, and the relief notch 420 is usually set as a square hole.

[0044] When the bracket 20 is assembled on the bottom plate 10, the relief notch 420 is engaged with the reinforcement member 50, so that the reinforcement member 50 can close the relief notch 420 to prevent the heat conducting adhesive from flowing out of the relief notch 420.

[0045] As Figure 3As shown, in some embodiments, a protective cover 60 is mounted on the bracket 20, the fuse 30 is installed in the protective cover 60, and the heat conducting member 40 is configured on the protective cover 60.

[0046] It can be understood that by installing the fuse 30 in the protective cover 60, the protective cover 60 can be used to provide physical protection and electrical isolation for the fuse 30, thereby isolating the electrical clearance between the fuse 30 and adjacent conductive components.

[0047] Among them, the heat conducting member 40 is integrally formed with the protective cover 60.

[0048] Please refer to Figure 5 , in some embodiments, the protective cover 60 includes a mounting plate 610 and side walls 620. The mounting plate 610 is connected to the bracket 20. The fuse 30 is installed on the mounting plate 610. The side walls 620 surround the mounting plate 610. Among them, the heat conducting member 40 is configured on the side of the side wall 620 facing the bottom plate 10.

[0049] The mounting plate 610 and the side walls 620 are integrally formed, and the side walls 620 surround the periphery of the mounting plate 610 to form a mounting groove, so that the fuse 30 is arranged in the mounting groove, and the side walls 620 can be used to isolate the electrical clearance between the fuse 30 and adjacent conductive components.

[0050] On the side close to the bottom plate 10, the side wall 620 abuts against the fuse 30. Thus, the heat conducting member 40 and the internal heat conducting adhesive layer formed on the side wall 620 can abut against the fuse 30, so that the heat generated by the fuse 30 can be quickly transferred to the bottom plate 10 through the heat conducting member 40 and the heat conducting adhesive layer, realizing the rapid heat dissipation of the fuse 30.

[0051] Please refer to Figure 5 and Figure 6 , in some embodiments, the side wall 620 includes a first wall segment 630 and a second wall segment 640. The first wall segment 630 and the second wall segment 640 are located on the side of the mounting plate 610 close to the bottom plate 10. Among them, the first wall segment 630 and the second wall segment 640 are arranged at intervals. The opposite sides of the heat conducting member 40 are respectively connected to the first wall segment 630 and the second wall segment 640.

[0052] The first wall segment 630 and the second wall segment 640 are arranged on the side close to the bottom plate 10, and the first wall segment 630 and the second wall segment 640 are arranged at intervals so as to connect the heat conducting member 40 between the first wall segment 630 and the second wall segment 640. Among them, the side of the heat conducting member 40 away from the bottom plate 10 is flush with the first wall segment 630 and the second wall segment 640. The side of the fuse 30 close to the bottom plate 10 can be attached to the first wall segment 630 and the second wall segment 640 for the pre-positioning and heat conduction of the fuse 30.

[0053] Such asFigure 5 As shown, both the first wall segment 630 and the second wall segment 640 can be arranged in a Z shape, which can achieve the effects of structural strengthening and space avoidance, and can ensure that there is sufficient installation area to install the fuse 30.

[0054] Please continue to refer to Figure 5 and Figure 6 , in some embodiments, the side wall 620 further includes a third wall segment 650. The third wall segment 650 is located on the side of the mounting plate 610 away from the bottom plate 10. The third wall segment 650 has a first segment 6510, a second segment 6520, and a third segment 6530 connected in sequence. The width of the first segment 6510 is D1, the width of the second segment 6520 is D2, and the width of the third segment 6530 is D3, satisfying: D3 > D1 > D2.

[0055] The third wall segment 650 is located at a position away from the bottom plate 10. Based on dividing the third wall segment 650 into the first segment 6510, the second segment 6520, and the third segment 6530, and making the width D3 of the third segment 6530 greater than the width D1 of the first segment 6510, and the width D1 of the first segment 6510 greater than the width D2 of the second segment 6520. Thus, the third segment 6530 can be used to fully shield the fuse 30 to isolate the electrical clearance between the fuse 30 and adjacent conductive components.

[0056] After the front panel 70 is installed on the battery box, a first notch can be formed between the first segment 6510 and the front panel 70. It can be understood that after the fuse 30 is installed, copper bars will be connected to both ends of the fuse 30. One of the copper bars can pass through the protective cover 60 from the first notch to achieve electrical connection with other electrical components. Among them, based on the width of the copper bar, the extension length of the first segment 6510 can be reasonably selected to ensure that the copper bar can pass through the protective cover 60 from the first notch.

[0057] The width of the third wall segment 650 is the narrowest at the position corresponding to the second segment 6520. Thus, an operation notch can be formed here. When the fuse 30 needs to be installed, the fuse 30 can be held at this operation notch to facilitate the installation, taking, and disassembly of the fuse 30.

[0058] Please continue to refer to Figure 5 and Figure 6 , in some embodiments, the side wall 620 further includes a fourth wall segment 660. Both ends of the fourth wall segment 660 are respectively connected to the second wall segment 640 and the third segment 6530. Among them, the width of the fourth wall segment 660 is D4, and the width of the second wall segment 640 is D6, satisfying: D3 > D4, and D6 > D4.

[0059] Based on the width design of the second wall segment 640, the third segment 6530, and the fourth wall segment 660, after the fourth wall segment 660, the second wall segment 640, and the third segment 6530 are connected, a second gap can be formed. It can be understood that after the fuse 30 is installed, copper bars will be connected to both ends of the fuse 30. One of the copper bars can pass through the protective cover 60 from the second gap to achieve electrical connection with other electrical components. Among them, based on the width of the copper bar, the extension length of the fourth wall segment 660 can be reasonably selected to ensure that the copper bar can pass through the protective cover 60 from the second gap.

[0060] In some embodiments, the width D6 of the second wall segment 640 is equal to the width D3 of the third segment 6530.

[0061] Please continue to refer to Figure 5 and Figure 6 In some embodiments, the side wall 620 further includes a fifth wall segment 670. Both ends of the fifth wall segment 670 are respectively connected to the first wall segment 630 and the first segment 6510. The width of the fifth wall segment 670 is D5, satisfying: D5 > D1.

[0062] Based on the relatively large width of the fifth wall segment 670, the fifth wall segment 670 can be used to fully shield the fuse 30 to isolate the electrical clearance between the fuse 30 and adjacent conductive components. And after the front panel 70 is completed, the fifth wall segment 670 can be in contact with or spaced from the front panel 70. Whether they are in contact or spaced, it can ensure that a first gap is formed between the first segment 6510 and the front panel 70 to ensure that the copper bar can pass through the protective cover 60 from the first gap.

[0063] In some embodiments, the width D5 of the fifth wall segment 670 is equal to the width D3 of the third segment 6530.

[0064] As Figure 4 shown, in some embodiments, the bracket 20 has a first mounting position 210, a second mounting position 220, and a third mounting position 230. The fuse 30 is installed at the first mounting position 210. The second mounting position 220 is configured to install a fire detector, and the third mounting position 230 is configured to install an aerosol fire extinguishing device.

[0065] It can be understood that by forming redundant first mounting position 210, second mounting position 220, and third mounting position 230 on the bracket 20, and setting the fuse 30 at the first mounting position 210, it is possible to select whether to install a fire detector at the second mounting position 220 and whether to install an aerosol fire extinguishing device at the third mounting position 230 based on the usage requirements, so that the bracket 20 can be compatible with multiple installation modes, thereby improving the compatibility and applicability of the battery pack.

[0066] The bracket 20 has a first mounting position 210, a second mounting position 220, and a third mounting position 230. The first mounting position 210 is used to mount the fuse 30. The second mounting position 220 is used to mount the fire detector. The third mounting position 230 is used to mount the aerosol fire extinguishing device. Thus, the bracket 20 has at least the following mounting modes:

[0067] Mode 1: The fuse 30 is mounted at the first mounting position 210, the fire detector is not mounted at the second mounting position 220, and the aerosol fire extinguishing device is not mounted at the third mounting position 230. At this time, the bracket 20 is applicable to the battery pack that adopts the perfluoropentanone fire protection scheme and does not have a fire detector.

[0068] Mode 2: The fuse 30 is mounted at the first mounting position 210, the fire detector is mounted at the second mounting position 220, and the aerosol fire extinguishing device is not mounted at the third mounting position 230. At this time, the bracket 20 is applicable to the battery pack that adopts the perfluoropentanone fire protection scheme and has a built-in fire detector.

[0069] Mode 3: The fuse 30 is mounted at the first mounting position 210, the fire detector is not mounted at the second mounting position 220, and the aerosol fire extinguishing device is mounted at the third mounting position 230. At this time, the bracket 20 is applicable to the battery pack that adopts the aerosol fire protection scheme and does not have a fire detector.

[0070] Mode 4: The fuse 30 is mounted at the first mounting position 210, the fire detector is mounted at the second mounting position 220, and the aerosol fire extinguishing device is mounted at the third mounting position 230. At this time, the bracket 20 is applicable to the battery pack that adopts the aerosol fire protection scheme and has a built-in fire detector.

[0071] Thus, based on constructing redundant mounting positions on the bracket 20, the bracket 20 can adapt to different usage modes and be compatible with battery packs with different usage requirements. When there is a need to export to the European and American regions, the aerosol fire extinguishing device can be mounted at the third mounting position 230 to meet the requirement of prohibiting the use of perfluoropentanone in the European and American regions. When there is a need for a built-in fire detector, the fire detector can be mounted at the second mounting position 220. Based on different usage requirements, the aerosol fire extinguishing device and the fire detector are reasonably mounted on the bracket 20 to improve the compatibility and applicability of the battery pack.

[0072] As Figure 3 shown, in some embodiments, the fuse 30 is connected with a first connecting member 310. One of the first connecting member 310 and the first mounting position 210 is configured with a first connecting column 240, and the other is configured with a first connecting hole 2810. The first connecting column 240 passes through the first connecting hole 2810 and is locked by a first fastener.

[0073] Based on the cooperation between the first connecting column 240 and the first connecting hole 2810 and being locked by the first fastener, reliable fixation of the fuse 30 on the bracket 20 can be achieved, preventing the fuse 30 from falling off the bracket 20.

[0074] For example, a first connecting hole 2810 is provided on the first connecting member 310. A first connecting column 240 is formed at the first installation position 210, and an external thread is formed on the first connecting column 240. The first connecting hole 2810 is assembled onto the first connecting column 240, and a nut is threadedly installed on the first connecting column 240 to achieve a reliable connection between the first connecting member 310 and the first connecting column 240. Thus, reliable fixation of the fuse 30 on the bracket 20 is achieved, preventing the fuse 30 from falling off the bracket 20.

[0075] For example, a first connecting column 240 is formed on the first connecting member 310, and an external thread is formed on the first connecting column 240. A first connecting hole 2810 is formed at the first installation position 210. The first connecting hole 2810 is assembled onto the first connecting column 240, and a nut is threadedly installed on the first connecting column 240 to achieve a reliable connection between the first connecting member 310 and the first connecting column 240. Thus, reliable fixation of the fuse 30 on the bracket 20 is achieved, preventing the fuse 30 from falling off the bracket 20.

[0076] As Figure 4 shown, in some embodiments, the fire detector is connected to a second connecting member, and one of the second connecting member and the second installation position 220 is formed with a second connecting column 250, and the other is formed with a second connecting hole 2910. The second connecting column 250 passes through the second connecting hole 2910 and is locked by a second fastener.

[0077] Based on the cooperation between the second connecting column 250 and the second connecting hole 2910 and being locked by the second fastener, reliable fixation of the fire detector on the bracket 20 can be achieved, preventing the fire detector from falling off the bracket 20.

[0078] For example, a second connecting hole 2910 is provided on the second connecting member. A second connecting column 250 is formed at the second installation position 220, and an external thread is formed on the second connecting column 250. The second connecting hole 2910 is assembled onto the second connecting column 250, and a nut is threadedly installed on the second connecting column 250 to achieve a reliable connection between the second connecting member and the second connecting column 250. Thus, reliable fixation of the fire detector on the bracket 20 is achieved, preventing the fire detector from falling off the bracket 20.

[0079] For example, a second connecting column 250 is constructed on the second connecting member, and an external thread is constructed on the second connecting column 250. A second connecting hole 2910 is constructed at the second installation position 220. The second connecting hole 2910 is assembled onto the second connecting column 250, and a nut is threadedly installed on the second connecting column 250 to achieve a reliable connection between the second connecting member and the second connecting column 250. Thereby, a reliable fixation of the fire detector on the bracket 20 is achieved, preventing the fire detector from falling off the bracket 20.

[0080] As Figure 4 shown, in some embodiments, the aerosol fire extinguishing device is connected with a third connecting member, and a third connecting column 260 is constructed on one of the third connecting member and the third installation position 230, and a third connecting hole is constructed on the other. The third connecting column 260 passes through the third connecting hole and is locked by a third fastener.

[0081] Based on the cooperation between the third connecting column 260 and the third connecting hole and being locked by the third fastener, a reliable fixation of the aerosol fire extinguishing device on the bracket 20 can be achieved, preventing the aerosol fire extinguishing device from falling off the bracket 20.

[0082] For example, a third connecting hole is provided on the third connecting member. A third connecting column 260 is constructed at the third installation position 230, and an external thread is constructed on the third connecting column 260. The third connecting hole is assembled onto the third connecting column 260, and a nut is threadedly installed on the third connecting column 260 to achieve a reliable connection between the third connecting member and the third connecting column 260. Thereby, a reliable fixation of the aerosol fire extinguishing device on the bracket 20 is achieved, preventing the aerosol fire extinguishing device from falling off the bracket 20.

[0083] For example, a third connecting column 260 is constructed on the third connecting member. An external thread is constructed on the third connecting column 260. A third connecting hole is constructed at the third installation position 230. The third connecting hole is assembled onto the third connecting column 260, and a nut is threadedly installed on the third connecting column 260 to achieve a reliable connection between the third connecting member and the third connecting column 260. Thereby, a reliable fixation of the aerosol fire extinguishing device on the bracket 20 is achieved, preventing the aerosol fire extinguishing device from falling off the bracket 20.

[0084] Please continue to refer to Figure 4 , in some embodiments, a weight reduction notch 270 is constructed at the third installation position 230. The weight reduction notch 270 can save the consumables of the bracket 20 and reduce the weight of the bracket 20. Thereby, the manufacturing cost of the bracket 20 is reduced, and the installation of the bracket 20 is facilitated.

[0085] For example, the weight reduction notch 270 is set as a square notch, a circular notch, an oval notch, etc.

[0086] As Figure 2As shown, in some embodiments, the heat dissipation structure further includes a front panel 70. The front panel 70 is connected to the bottom plate 10 and is configured to mount a fire sprinkler 710. The fire sprinkler 710 is used to connect to a fire pipeline. When there is a fire demand, the fire sprinkler 710 can spray perfluorhexanone in the fire pipeline into the battery box, thereby meeting the requirements of cooling and extinguishing the internal battery cells.

[0087] It can be understood that the fire sprinkler 710 is used to implement the perfluorhexanone fire protection solution. Therefore, when the fire sprinkler 710 is installed on the front panel 70, there is no need to install an aerosol fire protection device on the bracket 20. That is, when the bracket 20 is in Mode 1 and Mode 2, the fire sprinkler 710 can be installed on the front panel 70. When the bracket 20 is in Mode 3 and Mode 4, there is no need to install the fire sprinkler 710 on the front panel 70.

[0088] Among them, the front panel 70 is a plate structure of the battery box, and it can be fixed to the battery box through fastening mechanisms such as bolts. For example, the front panel 70 is connected to the bottom plate 10, the top plate, and the side plates by bolts. Alternatively, the front panel 70 can be connected to the box body skeleton by bolts.

[0089] As Figure 4 shown, in some embodiments, the bracket 20 is configured with a first bending portion 280 extending in the direction of the front panel 70. A first connection hole 2810 is formed on the first bending portion 280, and the first connection hole 2810 is connected to the bottom plate 10 through a fourth fastener.

[0090] It can be understood that the first bending portion 280 has a certain width, so that there is a bonding surface with a certain width between the bracket 20 and the bottom plate 10, which is convenient for pre-positioning between the bracket 20 and the bottom plate 10. The first connection hole 2810 formed on the first bending portion 280 can be connected to the mounting hole on the bottom plate 10 through a fourth fastener, thereby realizing the mutual fixation of the bracket 20 and the bottom plate 10.

[0091] For example, the mutual fixation of the bracket 20 and the bottom plate 10 can be realized by sequentially passing bolts through the first connection hole 2810 and the mounting hole of the bottom plate 10. Alternatively, the mutual fixation of the bracket 20 and the bottom plate 10 can be realized by sequentially arranging rivets in the first connection hole 2810 and the mounting hole of the bottom plate 10.

[0092] Among them, the first bending portion 280 can also play an effect of strengthening the structure of the bracket 20. The first bending portion 280 is configured on both sides and the bottom side of the bracket 20, thereby improving the structural strength of the bracket 20 and reducing the risk of deformation of the bracket 20 under external force.

[0093] Please continue to refer to Figure 4, in some embodiments, on the side of the bracket 20 away from the bottom plate 10, a second bending portion 290 extending in a direction away from the front panel 70 is formed. A second connection hole 2910 is formed on the second bending portion 290, and the second connection hole 2910 is configured to connect to the end plate of the battery module in the battery pack through a fifth fastener.

[0094] It can be understood that after the second bending portion 290 is bent in a direction away from the front panel 70, it can abut or overlap with the end plate of the battery module, and the second connection hole 2910 on the second bending portion 290 is aligned with the mounting hole on the end plate. By sequentially passing the fifth fastener through the second connection hole 2910 and the mounting hole, a firm connection between the bracket 20 and the end plate is achieved.

[0095] For example, the bracket 20 and the end plate can be fixed to each other by sequentially passing bolts through the second connection hole 2910 and the mounting hole of the end plate. Or, the bracket 20 and the end plate can be fixed to each other by sequentially arranging rivets in the second connection hole 2910 and the mounting hole of the end plate.

[0096] The upper side of the bracket 20 is connected to the end plate of the battery module through the second bending portion 290, and the lower side of the bracket 20 is connected to the bottom plate 10 of the battery box through the first bending portion 280. Thus, both the upper and lower sides of the bracket 20 can be fixed, ensuring the reliable installation of the bracket 20.

[0097] Based on the fact that the bracket 20 is integrally formed by sheet metal processing, the first bending portion 280 and the second bending portion 290 are both integrally formed on the bracket 20.

[0098] Please continue to refer to Figure 4 , in some embodiments, the bracket 20 includes a proximal side 21 close to the bottom plate 10 and a distal side 22 away from the bottom plate 10. The distal side 22 includes a first straight section 221, a first inclined section 222, a second straight section 223, a second inclined section 224, and a third straight section 225 connected in sequence. The second bending portion 290 is formed on the second straight section 223. Among them, the distance between the first straight section 221 and the proximal side 21 is L1, the distance between the second straight section 223 and the proximal side 21 is L2, and the distance between the third straight section 225 and the proximal side 21 is L3, satisfying: L2 > L3 > L1.

[0099] It can be understood that based on the above distance design, it can ensure that there is space on the bracket 20 to form the second mounting position 220. At the same time, it can also save the consumables of the bracket 20 and reduce the weight of the bracket 20. Thus, the production cost of the bracket 20 can be reduced, and the installation of the bracket 20 is facilitated.

[0100] Along the direction from the first straight section 221 to the third straight section 225, the first inclined section 222 is inclined in the direction from the far side 22 to the near side 21, and the second inclined section 224 is inclined in the direction from the near side 21 to the far side 22. Thus, a trapezoid-like structure can be formed on the far side 22, thereby forming the second mounting position 220 at this position.

[0101] On the other hand, an embodiment of the present invention also provides a battery pack. The battery pack includes the heat dissipation structure as described in the foregoing embodiment.

[0102] In some embodiments, the fuse 30 and the heat conducting member 40 are mounted by the bracket 20, and the heat conducting member 40 is connected between the fuse 30 and the bottom plate 10. Based on the heat conduction of the heat conducting member 40, the heat generated when the temperature of the fuse 30 rises can be transferred to the bottom plate 10, so as to realize the heat dissipation of the fuse 30 through this route, thereby preventing the fuse 30 from transferring heat to the aluminum busbar and causing too large a temperature difference between the aluminum busbars. Thus, it is possible to prevent the battery pack from generating an alarm due to too large a temperature difference between the aluminum busbars caused by the temperature rise of the fuse 30.

[0103] The embodiments of the present invention have been described in detail above. Specific examples are used herein to elaborate the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A heat dissipation structure, applied to a battery pack, characterized in that: include: Base plate; A bracket, mounted on the bottom plate; A fuse, mounted on the bracket; A heat conducting member is connected between the fuse and the bottom plate.

2. The heat dissipation structure according to claim 1, characterized in that: The heat-conducting member forms a heat dissipation channel extending from the fuse to the bottom plate. The heat dissipation channel is filled with a heat-conducting adhesive layer, and the heat-conducting adhesive layer is connected between the fuse and the bottom plate.

3. The heat dissipation structure according to claim 1, characterized in that: A clearance gap is formed on the heat conducting member at a side close to the bottom plate, and the clearance gap is configured to avoid the reinforcing member on the bottom plate.

4. The heat dissipation structure according to any one of claims 1 to 3, characterized in that: A protective cover is installed on the bracket, the fuse is installed in the protective cover, and the heat conducting member is constructed on the protective cover.

5. The heat dissipation structure according to claim 4, characterized in that: The protective cover comprises: A mounting plate connected to the bracket, the fuse being mounted on the mounting plate; A side wall enclosed by the mounting plate; Wherein, the heat conducting member is constructed on a side of the side wall facing the bottom plate.

6. The heat dissipation structure according to claim 5, characterized in that: The side wall includes a first wall section and a second wall section, wherein the first wall section and the second wall section are located on a side of the mounting plate close to the base plate, wherein the first wall section and the second wall section are spaced apart, and opposite sides of the heat conductor are respectively connected to the first wall section and the second wall section.

7. The heat dissipation structure according to claim 6, characterized in that: The side wall also includes a third wall section, which is located on a side of the mounting plate away from the base plate. The third wall section has a first section, a second section and a third section connected in sequence. The width of the first section is D1, the width of the second section is D2, and the width of the third section is D3, satisfying: D3>D1>D2.

8. The heat dissipation structure according to claim 7, characterized in that: The side wall also includes a fourth wall segment, two ends of which are respectively connected to the second wall segment and the third segment, wherein the width of the fourth wall segment is D4, and the width of the second wall segment is D6, satisfying: D3>D4, and D6>D4.

9. The heat dissipation structure according to claim 7, characterized in that: The side wall further includes a fifth wall segment, two ends of which are respectively connected to the first wall segment and the first section, and a width of the fifth wall segment is D5, satisfying: D5>D1.

10. A battery pack, characterized in that: It comprises the heat dissipation structure as described in any one of claims 1 to 9.

Images