Heat dissipation structure for battery pack of sanitation truck

Abstract

The utility model provides a heat dissipation structure for a battery pack of a sanitation truck, which comprises a battery protection box and a storage battery pack for the sanitation truck, and an active heat dissipation component is arranged on the lower side in the battery protection box. The heat conduction layer adsorbs most of heat on the side edge of the storage battery pack for the sanitation vehicle and transmits the heat to the battery protection box, the multiple vertical cooling fins can further improve the cooling area of the battery protection box at the moment, and meanwhile the intelligent temperature control switch monitors the temperature of the bottom of the battery protection box in real time through the temperature sensor; a cooling fan switch is automatically controlled to actively ventilate and cool the bottom of the battery protection box, a plurality of transverse ventilation holes are formed so that external air can conveniently enter the protection box cover to ventilate and cool the protection box cover, and a plurality of first through holes are formed so that part of heat in the transverse ventilation holes can be conveniently transferred to a plurality of longitudinal cooling fins to dissipate heat; therefore, heat accumulation of the protective box cover is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation of battery packs for sanitation vehicles, in particular to a heat dissipation structure of battery packs for sanitation vehicles. Background Art

[0002] Sanitation vehicles are special vehicles used for urban appearance management and cleaning. They are special vehicles serving environmental sanitation management, road maintenance and urban sanitation. They are mainly used in urban environmental sanitation, garbage management stations, urban roads, community sanitation, garden green belts and other places.

[0003] Publication number "CN211455805U" provides a battery box for an electric sanitation vehicle, in which two battery bodies are separated by a first partition and a second partition, so that a first cavity and a second cavity are formed between the battery bodies, thereby increasing the fluidity of the gas between the battery bodies. Through the support of the U-shaped plate and the ventilation effect of the mesh of the grid, a certain space is formed between the bottom of the battery body and the bottom of the box. Through the cooperation of the wind hood, the first tube body and the second tube body on both sides, the hot gas is gathered from the bottom of the grid to the position of the first cavity and the second cavity, and then discharged through the first tube body and the second tube body respectively, thereby effectively discharging the hot gas emitted by the battery body.

[0004] However, the above technical solutions and the prior art have the following defects:

[0005] First, the cooling fan in the battery box of the electric sanitation vehicle will continue to work when the sanitation vehicle is turned on, and cannot be automatically turned on and off according to the temperature of the battery box, thereby increasing the power consumption of the sanitation vehicle. Secondly, there is no heat dissipation structure on the outer surface of the battery box and the outer surface of the cover, resulting in low heat dissipation capacity of the battery box and the cover itself, and the practicality needs to be improved. Utility Model Content

[0006] The purpose of the utility model is to provide a heat dissipation structure of a battery pack of a sanitation vehicle to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A heat dissipation structure for a battery pack for a sanitation vehicle comprises a support base, a battery protection box, a protection box cover and a battery pack for a sanitation vehicle, wherein the bottom of the battery protection box is fixedly connected to the support base, the upper end face of the battery protection box is provided with a protection box cover, a battery pack for a sanitation vehicle is placed inside the battery protection box, an active heat dissipation component is arranged on the lower side of the battery protection box, and the active heat dissipation component is used for actively ventilating and cooling the battery protection box, an auxiliary heat dissipation component is arranged on the upper end face of the protection box cover, and the auxiliary heat dissipation component is used for further improving the heat dissipation effect of the protection box cover.

[0009] Preferably, the active heat dissipation component includes a shunt pipe, exhaust holes, an air inlet pipe, a cooling fan, an intelligent temperature control switch, a temperature sensor and a connecting pipe. A plurality of exhaust holes are opened on the lower side of the interior of the battery protection box. A connecting pipe is fixedly connected to the lower side of the left end surface of the battery protection box, a shunt pipe is fixedly connected to the left end of the connecting pipe, the lower side of the annular side surface of the shunt pipe is fixedly connected to the air inlet pipe, the bottom of the air inlet pipe is fixedly connected to a cooling fan, an intelligent temperature control switch is installed on the left side of the lower end surface of the support base, and a temperature sensor is installed in the middle position of the bottom of the battery protection box.

[0010] Preferably, the left and right end faces and the front and rear end faces of the battery protection box are provided with a plurality of heat conduction holes, the left and right end faces and the front and rear end faces of the battery protection box are fixedly connected with a plurality of vertical heat sinks, and vertical ventilation holes are provided inside the vertical heat sinks.

[0011] Preferably, the auxiliary heat dissipation assembly includes longitudinal heat sinks, transverse ventilation holes, first through holes, second through holes and a top limit seat, the upper end surface of the protective box cover is fixedly connected with a plurality of longitudinal heat sinks, a plurality of transverse ventilation holes are opened inside the protective box cover, a top limit seat is provided on the inner wall of the protective box cover, a first through hole is opened between the transverse ventilation hole and the longitudinal heat sink, and a second through hole is opened between the transverse ventilation hole and the top limit seat.

[0012] Preferably, longitudinal ventilation holes are provided inside the longitudinal heat sink, and heat sink fins are symmetrically and fixedly connected to the left and right end surfaces of the longitudinal heat sink.

[0013] Preferably, the top limit seat is made of thermally conductive silicone rubber, a threading slot is provided on the lower end surface of the top limit seat, and threading through holes are symmetrically provided on the left and right sides of the lower end surface of the protective box cover, and the threading through holes are connected to the threading slot.

[0014] Preferably, the output end of the intelligent temperature control switch is connected to the cooling fan through a wire, the input end of the intelligent temperature control switch is connected to the battery assembly for the sanitation vehicle through a wire, and the temperature sensor is connected to the intelligent temperature control switch through a signal line.

[0015] Preferably, a heat-conducting layer is bonded to the inner wall of the battery protection box, and the material of the heat-conducting layer is heat-conducting silicone rubber. A heat-insulating sheet is inserted between the battery packs for the sanitation vehicle, and the material of the heat-insulating sheet is heat-insulating silicone rubber.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. During the use of the battery pack for sanitation vehicles, the heat-conducting layer of the utility model absorbs most of the heat on the side of the battery pack for sanitation vehicles and transfers it to the battery protection box. At this time, multiple vertical heat sinks can further increase the heat dissipation area of ​​the battery protection box, thereby assisting the heat dissipation of the battery protection box. At the same time, the intelligent temperature control switch monitors the temperature at the bottom of the battery protection box in real time through the temperature sensor, and automatically controls the heat dissipation fan switch to actively ventilate and cool the bottom of the battery protection box, which not only avoids the easy accumulation of heat at the bottom of the battery protection box, but also prevents the heat dissipation fan from working all the time, resulting in high power consumption;

[0018] 2. During the use of the battery pack for sanitation vehicles, the utility model can transfer most of the heat on the top of the battery pack to the protective box cover, and the multiple transverse ventilation holes are convenient for external air to enter the protective box cover for ventilation and cooling. At the same time, the multiple second through holes will transfer a part of the heat in the top limit seat to the transverse ventilation holes for heat dissipation, and the multiple first through holes will transfer a part of the heat in the transverse ventilation holes to the multiple longitudinal heat sinks for heat dissipation. The longitudinal ventilation holes and heat sinks can further increase the heat dissipation area of ​​the longitudinal heat sinks, thereby avoiding heat accumulation in the protective box cover, and the utility model has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0020] Figure 2 It is a right side view of the battery protection box and the protection box cover in the utility model;

[0021] Figure 3 It is a front cross-sectional view of the active heat dissipation component and the auxiliary heat dissipation component in the utility model;

[0022] Figure 4 This is a structural diagram of the battery protection box in the utility model;

[0023] Figure 5 It is a structural diagram of the auxiliary heat dissipation component in the utility model.

[0024] In the figure: 1. Support base; 2. Active heat dissipation component; 21. Diverter pipe; 22. Exhaust hole; 23. Heat conductive layer; 24. Heat insulation sheet; 25. Air inlet pipe; 26. Cooling fan; 27. Intelligent temperature control switch; 28. Temperature sensor; 29. ​​Connecting pipe; 211. Vertical heat sink; 212. Vertical ventilation hole; 213. Heat conductive hole; 3. Battery protection box; 4. Protection box cover; 41. Threading hole; 5. Auxiliary heat dissipation component; 51. Longitudinal heat sink; 52. Horizontal ventilation hole; 53. Longitudinal ventilation hole; 54. Heat dissipation fin; 55. First through hole; 56. Second through hole; 57. Top limit seat; 571. Threading slot; 6. Battery pack for sanitation vehicle. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-5 , the utility model provides a technical solution:

[0027] Embodiment 1:

[0028] A heat dissipation structure for a battery pack for a sanitation vehicle comprises a support base 1, a battery protection box 3, a protection box cover 4 and a battery pack 6 for a sanitation vehicle. The bottom of the battery protection box 3 is fixedly connected to the support base 1, the support base 1 is installed and fixed at a designated position of an external sanitation vehicle, the support base 1 supports and fixes the battery protection box 3, a protection box cover 4 is installed on the upper end surface of the battery protection box 3, the protection box cover 4 is a detachable structure, the detachable protection box cover 4 not only shields the upper end surface of the battery protection box 3, but also facilitates the later maintenance of the inside of the battery protection box 3 by the staff, a battery pack 6 for a sanitation vehicle is placed inside the battery protection box 3, the battery pack 6 for a sanitation vehicle will supply power to electronic components in the external sanitation vehicle.

[0029] An active heat dissipation component 2 is arranged on the lower side of the battery protection box 3, and the active heat dissipation component 2 is used to actively ventilate and cool the battery protection box 3. An auxiliary heat dissipation component 5 is arranged on the upper end surface of the protection box cover 4, and the auxiliary heat dissipation component 5 is used to further improve the heat dissipation effect of the protection box cover 4.

[0030] The active heat dissipation component 2 includes a shunt pipe 21, an exhaust hole 22, an air inlet pipe 25, a cooling fan 26, an intelligent temperature control switch 27, a temperature sensor 28 and a connecting pipe 29. A plurality of exhaust holes 22 are provided on the lower side of the battery protection box 3. The plurality of exhaust holes 22 facilitate air to enter the lower side of the battery protection box 3 for ventilation and cooling. A connecting pipe 29 is fixedly connected to the lower side of the left end face of the battery protection box 3. A plurality of connecting pipes 29 are fixedly connected, and the plurality of connecting pipes 29 have the same specifications. The connecting pipe 29 is respectively connected to the shunt pipe 21 and the exhaust hole 22. The plurality of connecting pipes 29 will guide the air in the shunt pipe 21 to the plurality of exhaust holes 22. A shunt pipe 21 is fixedly connected to the left end of the connecting pipe 29. The shunt pipe 21 will divert the air guided from the air inlet pipe 25 to the plurality of connecting pipes 29.

[0031] An air inlet pipe 25 is fixedly connected to the lower side of the circular side of the shunt pipe 21. The air inlet pipe 25 is respectively connected to the shunt pipe 21 and the cooling fan 26. The air inlet pipe 25 facilitates the cooling fan 26 to blow air into the shunt pipe 21. The cooling fan 26 is fixedly connected to the bottom of the air inlet pipe 25. The cooling fan 26 blows air to the air inlet pipe 25 when working. An intelligent temperature control switch 27 is installed on the left side of the lower end surface of the support base 1. The output end of the intelligent temperature control switch 27 is connected to the cooling fan 26 through a wire, and the input end of the intelligent temperature control switch 27 is connected to 6 battery packs for sanitation vehicles through a wire. A battery protection box 3 is installed in the middle of the bottom. The temperature sensor 28 is connected to the intelligent temperature control switch 27 through a signal line. When the temperature sensor 28 detects that the temperature value at the bottom of the battery protection box 3 exceeds the highest preset value, the intelligent temperature control switch 27 will control the cooling fan 26 to be powered on, so as to actively ventilate and cool the bottom of the battery protection box 3. When the intelligent temperature control switch 27 detects that the temperature value at the bottom of the battery protection box 3 is lower than the lowest preset value through the temperature sensor 28, the cooling fan 26 will be stopped from being powered on, so as to automatically switch on and off the cooling fan 26 according to the temperature at the bottom of the battery protection box 3, thereby reducing the power consumption of the cooling fan 26.

[0032] The left and right end faces and the front and rear end faces of the battery protection box 3 are all provided with a plurality of heat-conducting holes 213, and the plurality of heat-conducting holes 213 will transfer most of the heat absorbed by the heat-conducting layer 23 to the plurality of vertical heat sinks 211. The left and right end faces and the front and rear end faces of the battery protection box 3 are all fixedly connected with a plurality of vertical heat sinks 211, and the plurality of vertical heat sinks 211 can further increase the heat dissipation area of ​​the battery protection box 3, thereby assisting the heat dissipation of the battery protection box 3. Vertical ventilation holes 212 are provided inside the vertical heat sink 211, and the vertical ventilation holes 212 not only facilitate external air to enter the vertical heat sink 211 for ventilation and cooling, but also can further increase the vertical heat sink The heat dissipation area is 211, and a heat-conducting layer 23 is bonded to the inner wall of the battery protection box 3, and the heat-conducting layer 23 is made of heat-conducting silicone rubber. The heat-conducting layer 23 made of heat-conducting silicone rubber has good heat-conducting effect, so as to transfer most of the heat generated by the sides of the battery packs 6 for sanitation vehicles to the battery protection box 3. A heat-insulating sheet 24 is inserted between the battery packs 6 for sanitation vehicles, and the heat-insulating sheet 24 is made of heat-insulating silicone. The heat-insulating sheet 24 made of heat-insulating silicone can not only isolate most of the heat between the battery packs 6 for sanitation vehicles, avoiding overheating of one of the battery packs 6 for sanitation vehicles and affecting the battery packs 6 for sanitation vehicles next to it, but also avoiding bumps between the battery packs 6 for sanitation vehicles.

[0033] Embodiment 2:

[0034] On the basis of the first embodiment, in this embodiment, by setting a top limit seat 57, most of the heat on the top of the battery pack 6 for sanitation vehicles can be transferred to the protective box cover 4, and the multiple transverse ventilation holes 52 are convenient for external air to enter the protective box cover 4 for ventilation and cooling. At the same time, the multiple second through holes 56 will transfer a part of the heat in the top limit seat 57 to the transverse ventilation holes 52 for heat dissipation, and the multiple first through holes 55 will transfer a part of the heat in the transverse ventilation holes 52 to the multiple longitudinal heat sinks 51 for heat dissipation. The longitudinal ventilation holes 53 and the heat sink fins 54 can further increase the heat dissipation area of ​​the longitudinal heat sink 51, thereby preventing the protective box cover 4 from easily accumulating heat.

[0035] The auxiliary heat dissipation component 5 includes longitudinal heat sinks 51, transverse ventilation holes 52, first through holes 55, second through holes 56 and top limit seats 57. The upper end surface of the protective box cover 4 is fixedly connected with multiple longitudinal heat sinks 51. The multiple longitudinal heat sinks 51 can increase the heat dissipation area of ​​the protective box cover 4, thereby assisting the heat dissipation of the protective box cover 4. A plurality of transverse ventilation holes 52 are opened inside the protective box cover 4. The transverse ventilation holes 52 are respectively connected with the first through holes 55 and the second through holes 56. The multiple transverse ventilation holes 52 facilitate external air to enter the protective box cover 4 for ventilation and cooling. The inner wall of the protective box cover 4 is provided with a top limit seat 57. The top limit seat 57 is made of thermal conductive silicone rubber. The top limit seat 57 made of thermal conductive silicone rubber can not only transfer most of the top heat of the sanitation vehicle battery pack 6 to the protective box cover 4, but also press and limit the sanitation vehicle battery pack 6 to avoid up and down displacement of the sanitation vehicle battery pack 6 during use.

[0036] A threading slot 571 is provided on the lower end surface of the top limit seat 57, and the threading slot 571 facilitates the connection wires between the battery packs 6 for sanitation vehicles to be inserted into the top limit seat 57. Threading through holes 41 are symmetrically provided on the left and right sides of the lower end surface of the protective box cover 4, and the threading through holes 41 are connected to the threading slot 571. The threading through holes 41 facilitate the insertion of external wires into the lower end surface of the protective box cover 4 for use, and after the external wires are inserted into the threading through holes 41, the threading through holes 41 are sealed with the help of external explosion-proof clay to prevent external dust from easily entering the threading through holes 41. A first through hole 55 is provided between the horizontal ventilation hole 52 and the longitudinal heat sink 51, and a plurality of first through holes 55 are provided, and a plurality of first through holes 55, a plurality of first through holes 55 facilitates transferring a portion of the heat in the transverse ventilation holes 52 to the multiple longitudinal heat sinks 51 for heat dissipation. A second through hole 56 is provided between the transverse ventilation hole 52 and the top limit seat 57. The multiple second through holes 56 facilitate transferring a portion of the heat in the top limit seat 57 to the transverse ventilation hole 52 for heat dissipation. The longitudinal heat sink 51 is provided with longitudinal ventilation holes 53. The longitudinal ventilation holes 53 not only facilitate external air to enter the longitudinal heat sink 51 to cool it, but also can increase the heat dissipation area of ​​the longitudinal heat sink 51. The left and right end surfaces of the longitudinal heat sink 51 are symmetrically fixedly connected with heat dissipation fins 54. The heat dissipation fins 54 can further increase the heat dissipation area of ​​the longitudinal heat sink 51, thereby making the heat dissipation effect of the longitudinal heat sink 51 better.

[0037] Working principle: During the use of the battery pack 6 for sanitation vehicles, the heat-conducting layer 23 will absorb most of the heat on the side of the battery pack 6 for sanitation vehicles and transfer it to the battery protection box 3. At this time, the heat-conducting holes 213 will transfer a part of the heat adsorbed by the heat-conducting layer 23 to the vertical heat sink 211, and the multiple vertical heat sinks 211 can further increase the heat dissipation area of ​​the battery protection box 3, thereby assisting the heat dissipation of the battery protection box 3, and the vertical ventilation holes 212 not only facilitate the external air to enter the vertical heat sink 211 for ventilation and cooling, but also can further increase the vertical heat sink 211 heat dissipation area; at the same time, the intelligent temperature control switch 27 will monitor the temperature at the bottom of the battery protection box 3 in real time through the temperature sensor 28. When the temperature value at the bottom of the battery protection box 3 exceeds the maximum preset value, the cooling fan 26 will be controlled to be powered on. At this time, the working cooling fan 26 will blow air to the air inlet pipe 25, and then the air will be diverted to multiple connecting pipes 29 through the shunt pipe 21, and then enter the multiple exhaust holes 22 through the multiple connecting pipes 29. At this time, the air will absorb the heat in the multiple exhaust holes 22 and discharge it to the outside, so as to actively ventilate the bottom of the battery protection box 3. The intelligent temperature control switch 27 detects that the temperature value at the bottom of the battery protection box 3 is lower than the lowest preset value through the temperature sensor 28, and stops the cooling fan 26 from being powered on, thereby reducing the power consumption of the cooling fan 26; the top limit seat 57 is set through the customs, which can not only transfer most of the heat on the top of the sanitation vehicle battery pack 6 to the protection box cover 4, but also press the sanitation vehicle battery pack 6 to limit the position, so as to avoid the sanitation vehicle battery pack 6 from moving up and down during use. , which facilitates external air to enter the protective box cover 4 for ventilation and cooling. At the same time, the multiple second through holes 56 will transfer a portion of the heat in the top limit seat 57 to the horizontal ventilation holes 52 for heat dissipation, and the multiple first through holes 55 facilitate the transfer of a portion of the heat in the horizontal ventilation holes 52 to the multiple longitudinal heat sinks 51 for heat dissipation, and the longitudinal ventilation holes 53 and the heat sinks 54 can further increase the heat dissipation area of ​​the longitudinal heat sink 51, thereby preventing the protective box cover 4 from easily accumulating heat, thereby preventing the sanitation vehicle battery pack 6 from easily accumulating heat during use.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat dissipation structure for a battery pack for a sanitation vehicle, comprising a support base (1), a battery protection box (3), a protection box cover (4) and a battery pack for a sanitation vehicle (6), characterized in that: The bottom of the battery protection box (3) is fixedly connected to a support base (1), the upper end surface of the battery protection box (3) is provided with a protection box cover (4), and a storage battery pack (6) for a sanitation vehicle is placed inside the battery protection box (3); An active heat dissipation component (2) is provided on the lower side of the battery protection box (3), and the active heat dissipation component (2) is used to actively ventilate and cool the battery protection box (3); an auxiliary heat dissipation component (5) is provided on the upper end surface of the protection box cover (4), and the auxiliary heat dissipation component (5) is used to further improve the heat dissipation effect of the protection box cover (4).

2. A heat dissipation structure for a battery pack of a sanitation vehicle according to claim 1, characterized in that: The active heat dissipation component (2) comprises a shunt pipe (21), an exhaust hole (22), an air inlet pipe (25), a cooling fan (26), an intelligent temperature control switch (27), a temperature sensor (28) and a connecting pipe (29); a plurality of exhaust holes (22) are provided on the lower side of the battery protection box (3); a connecting pipe (29) is fixedly connected to the lower side of the left end surface of the battery protection box (3); a shunt pipe (21) is fixedly connected to the left end of the connecting pipe (29); an air inlet pipe (25) is fixedly connected to the lower side of the annular side surface of the shunt pipe (21); a cooling fan (26) is fixedly connected to the bottom of the air inlet pipe (25); an intelligent temperature control switch (27) is installed on the left side of the lower end surface of the support base (1); and a temperature sensor (28) is installed at the middle position of the bottom of the battery protection box (3).

3. A heat dissipation structure for a battery pack of a sanitation vehicle according to claim 1, characterized in that: The left and right end faces and the front and rear end faces of the battery protection box (3) are provided with a plurality of heat conduction holes (213); the left and right end faces and the front and rear end faces of the battery protection box (3) are fixedly connected with a plurality of vertical heat sinks (211); and the vertical heat sinks (211) are provided with vertical ventilation holes (212) inside.

4. A heat dissipation structure for a battery pack of a sanitation vehicle according to claim 1, characterized in that: The auxiliary heat dissipation component (5) comprises longitudinal heat sinks (51), transverse ventilation holes (52), first through holes (55), second through holes (56) and a top limit seat (57); the upper end surface of the protective box cover (4) is fixedly connected with a plurality of longitudinal heat sinks (51); a plurality of transverse ventilation holes (52) are provided inside the protective box cover (4); a top limit seat (57) is provided on the inner wall of the protective box cover (4); a first through hole (55) is provided between the transverse ventilation hole (52) and the longitudinal heat sinks (51); and a second through hole (56) is provided between the transverse ventilation hole (52) and the top limit seat (57).

5. A heat dissipation structure for a battery pack of a sanitation vehicle according to claim 4, characterized in that: A longitudinal ventilation hole (53) is provided inside the longitudinal heat sink (51), and heat sink fins (54) are symmetrically fixedly connected to the left and right end surfaces of the longitudinal heat sink (51).

6. A heat dissipation structure for a battery pack of a sanitation vehicle according to claim 4, characterized in that: The top limit seat (57) is made of heat-conducting silicone rubber, and a threading slot (571) is provided on the lower end surface of the top limit seat (57). Threading through holes (41) are symmetrically provided on the left and right sides of the lower end surface of the protective box cover (4), and the threading through holes (41) are connected to the threading slot (571).

7. A heat dissipation structure for a battery pack of a sanitation vehicle according to claim 2, characterized in that: The output end of the intelligent temperature control switch (27) is connected to the cooling fan (26) via a wire, the input end of the intelligent temperature control switch (27) is connected to the sanitation vehicle battery pack (6) via a wire, and the temperature sensor (28) is connected to the intelligent temperature control switch (27) via a signal line.

8. The heat dissipation structure of a battery pack for a sanitation vehicle according to claim 1, characterized in that: The inner wall of the battery protection box (3) is bonded with a heat-conducting layer (23), and the material of the heat-conducting layer (23) is heat-conducting silicone rubber. A heat-insulating sheet (24) is inserted between the storage battery packs (6) for sanitation vehicles, and the material of the heat-insulating sheet (24) is heat-insulating silicone rubber.

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