An electric vehicle and its in-vehicle battery heat insulation system

Abstract

The present invention discloses a vehicle-mounted battery heat insulation system, which includes a vehicle-mounted battery, a first cushion block for fixing to the vehicle frame bottom plate, a heat insulation plate disposed above the first cushion block, and a second cushion block disposed above the heat insulation plate. The vehicle-mounted battery is placed above the second cushion block; a first heat dissipation channel is formed between the heat insulation plate and the vehicle frame bottom plate, and a second heat dissipation channel is formed between the heat insulation plate and the vehicle-mounted battery. The present invention also discloses an electric vehicle including the above vehicle-mounted battery heat insulation system. The vehicle-mounted battery heat insulation system provided by the present invention not only ensures the protection requirements of dust and water prevention for the vehicle-mounted battery, but also improves the heat dissipation capacity, and avoids the vehicle-mounted battery from stopping working due to excessive temperature.

Description

Technical Field

[0001] The present invention relates to the field of vehicle equipment, and particularly to an in-vehicle battery heat insulation system. The present invention also relates to an electric vehicle having an in-vehicle battery heat insulation system. Background Art

[0002] At present, domestic lithium battery forklifts are widely used in the field of electric forklifts because of their advantages such as fast charging and cleanliness. However, most manufacturers choose a relatively low capacity considering the cost factor of the lithium battery pack, which results in a greatly shortened one-time endurance mileage of the lithium battery. During the working interval, multiple charges are required, and continuous charge and discharge operations cause the temperature of the lithium battery to rise very quickly. The walking motor and the hydraulic oil tank are located directly below the lithium battery. When the vehicle is working, the heat generated by the hydraulic oil tank and the walking motor will be directly absorbed by the lithium battery pack, thereby accelerating the temperature rise of the lithium battery pack. Therefore, the temperature of the lithium battery is very likely to exceed 65°C. After exceeding this temperature, the lithium battery pack will stop outputting, and the vehicle will stop operating. The common practice of most manufacturers is to install fans on both sides of the lithium battery for forced heat dissipation. This seriously damages the waterproof and dustproof grade of the lithium battery and the clean working environment required by the lithium battery, and also does not conform to the general trend of electric vehicles replacing fuel vehicles and moving outdoors.

[0003] Therefore, how to solve the problem of overheating of in-vehicle batteries without reducing the waterproof and dustproof grade of in-vehicle batteries has become a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of the present invention is to provide an in-vehicle battery heat insulation system, which can improve the heat dissipation ability of the in-vehicle battery without reducing the dustproof and waterproof grade of the in-vehicle battery, and avoid the in-vehicle battery from stopping working due to excessive temperature. Another purpose of the present invention is to provide an electric vehicle including the above-mentioned in-vehicle battery heat insulation system.

[0005] To achieve the above purpose, the present invention provides an in-vehicle battery heat insulation system, which includes an in-vehicle battery, a first cushion block for fixing on the frame bottom plate, a heat insulation plate arranged above the first cushion block, and a second cushion block arranged above the heat insulation plate, and the in-vehicle battery is placed above the second cushion block;

[0006] A first heat dissipation channel is formed between the heat insulation plate and the frame bottom plate, and a second heat dissipation channel is formed between the heat insulation plate and the in-vehicle battery.

[0007] Optionally, the heat insulation plate includes a sheet metal plate located on the upper layer and a heat insulation cotton located on the lower layer, and the heat insulation cotton is fixedly glued to the sheet metal plate.

[0008] Optionally, the first cushion block is a long strip-shaped cushion block, the first cushion block is arranged in parallel at both ends in the length direction of the heat insulation plate, and the orthographic projection of the second cushion block is located directly above the first cushion block.

[0009] Optionally, a through hole is formed in a portion of the heat insulation board that is in contact with the first cushion block, and the second cushion block is fixedly connected to the first cushion block via the through hole.

[0010] Optionally, the first cushion block and the second cushion block are each provided with a threaded hole coaxially arranged with the through hole, and a threaded fastener connecting the first cushion block and the second cushion block is provided in the threaded hole.

[0011] Optionally, the through holes, the threaded holes and the second pads are all in four groups, the heat insulation board is a rectangular board, and the second pads are correspondingly arranged at the four corners of the heat insulation board.

[0012] Optionally, the second cushion block is a rubber buffer cushion block.

[0013] Optionally, the height of the second cushion block is greater than or equal to the height of the first cushion block.

[0014] The present invention also provides an electric vehicle, comprising any of the above-mentioned on-vehicle battery insulation systems.

[0015] Optionally, the electric vehicle is specifically an electric forklift, which includes a hydraulic oil tank, a travel motor, and a frame bottom plate arranged above the hydraulic oil tank and the travel motor, and the first cushion block is welded above the frame bottom plate.

[0016] Compared with the above background technology, the vehicle-mounted battery heat insulation system provided by the present invention includes a vehicle-mounted battery and a heat insulation board. The heat insulation board is raised by a first pad and arranged on the frame bottom plate, and a first heat dissipation channel for heat dissipation is formed between the heat insulation board and the frame bottom plate, and the heat insulation board plays a good heat insulation role; the heat insulation board is provided with a second pad, and the vehicle-mounted battery is placed above the second pad. The vehicle-mounted battery is raised by the second pad and arranged above the heat insulation board, so that a second heat dissipation channel for heat dissipation is formed between the heat insulation board and the vehicle-mounted battery. The heights of the first heat dissipation channel and the second heat dissipation channel are approximately equal to the heights of the first pad and the second pad, respectively. When the heat generated by the hydraulic oil tank and the travel motor is transferred to the vehicle-mounted battery, it is first dissipated through the first heat dissipation channel, and the heat continues to be transferred upward to the heat insulation board. After the heat insulation of the heat insulation board, a very small part of the heat is transferred to the second heat dissipation channel, and the second heat dissipation channel further dissipates the heat, and the heat transferred to the vehicle-mounted battery can be basically ignored, thereby effectively avoiding the overheating of the vehicle-mounted battery. And there is no need to force the heat dissipation of the vehicle-mounted battery through auxiliary mechanisms such as fans, and the inherent dustproof and waterproof structure of the vehicle-mounted battery will not be damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0018] Figure 1 Schematic diagram of the vehicle-mounted battery heat insulation system provided by an embodiment of the invention;

[0019] Figure 2 For Figure 1 Schematic diagram of the heat transfer of the vehicle-mounted battery heat insulation system in

[0020] Figure 3 For Figure 1 Top view of the assembly and fixation of the vehicle-mounted battery heat insulation system in

[0021] Wherein:

[0022] 01 - hydraulic oil tank, 02 - traveling motor, 03 - frame bottom plate, 1 - first cushion block, 2 - heat insulation plate, 21 - heat insulation cotton, 22 - sheet metal plate, 3 - second cushion block, 4 - vehicle-mounted battery. Detailed implementation manners

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0024] To enable those skilled in the art of this technology to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation manners.

[0025] Please refer to Figures 1 to 3 , Figure 1 Schematic diagram of the vehicle-mounted battery heat insulation system provided by an embodiment of the invention; Figure 2 For Figure 1 Schematic diagram of the heat transfer of the vehicle-mounted battery heat insulation system in Figure 3 For Figure 1 Top view of the assembly and fixation of the vehicle-mounted battery heat insulation system in Figure 2 The arrow direction in indicates the direction of heat transfer.

[0026] The vehicle-mounted battery heat insulation system provided by the present invention includes a first cushion block 1, a heat insulation plate 2, a second cushion block 3 and a vehicle-mounted battery 4. The vehicle-mounted battery 4 is used to supply power to the vehicle and provide energy for the power device. The first cushion block 1 is fixedly connected to the frame bottom plate 03 of the vehicle. The heat insulation plate 2 is arranged above the first cushion block 1. On the one hand, it cooperates with the cushion block to form a first heat dissipation channel between the frame bottom plate 03 and the heat insulation plate 2. The height of the first cushion block 1 is the height of the first heat dissipation channel. On the other hand, the heat insulation plate 2 itself plays a role in isolating heat and reducing the upward transfer of heat. The second cushion block 3 is arranged above the heat insulation plate 2 and is used to support and cooperate with the vehicle-mounted battery 4, so that a second heat dissipation channel is formed between the vehicle-mounted battery 4 and the heat insulation plate 2. The height of the second heat dissipation channel is equal to the height of the second cushion block 3.

[0027] Through the heat dissipation of the first heat dissipation channel and the isolation of heat by the heat insulation plate 2, the heat transferred upward through the heat insulation plate 2 has been significantly reduced, and the second heat dissipation channel can dissipate the heat again, reducing the heat transferred to the vehicle-mounted battery 4. The heat causing the vehicle-mounted battery 4 to heat up is basically the heat generated when the vehicle-mounted battery 4 works by itself. This part of the heat is taken into account in the production and design of the vehicle-mounted battery 4 and usually does not affect the normal operation of the vehicle-mounted battery 4. By insulating the vehicle-mounted battery 4, the heat generated in other parts of the vehicle is reduced from being transferred to the vehicle-mounted battery 4, avoiding overheating of the vehicle-mounted battery 4. It should be noted that the setting of the vehicle-mounted battery 4 and its dust and waterproof structure itself can refer to the prior art, and the present invention does not make improvements to the vehicle-mounted battery 4 and its dust and waterproof structure itself or damage its dust and waterproof mechanism.

[0028] In a specific embodiment provided by the present invention, the first cushion block 1 adopts a long strip-shaped metal cushion block. Since the vehicle-mounted battery 4 is generally a regular cuboid structure and the heat insulation plate 2 is for isolating the heat transferred to the vehicle-mounted battery 4, the heat insulation plate 2 generally adopts a rectangular heat insulation plate 2. The long strip-shaped first cushion blocks 1 are arranged parallel to each other at both ends in the length direction of the heat insulation plate 2. In other words, there are two first cushion blocks 1, and the length direction of the two first cushion blocks 1 is parallel to the width direction of the rectangular heat insulation plate 2, and the heat insulation plate 2 is arranged on the first cushion blocks 1.

[0029] One function of the second cushion block 3 is to isolate the vehicle-mounted battery 4 relative to the heat insulation plate 2, and another function is to carry and fix the vehicle-mounted battery 4. Generally speaking, the second cushion block 3 can be selected to be set in four groups, and the four groups of second cushion blocks 3 are respectively arranged at the preset positions of the four corners of the heat insulation plate 2, so that the vehicle-mounted battery 4 can be placed on the second cushion block 3 through its four corners. In order to better transfer the gravity of the vehicle-mounted battery 4, the orthographic projection of the second cushion block 3 falls directly above the first cushion block 1, that is, the second cushion block 3 is located directly above the first cushion block 1, and only a layer of heat insulation plate 2 is isolated between the two. The vehicle-mounted battery 4 transfers the gravity to the second cushion block 3, the second cushion block 3 acts on the heat insulation plate 2 and transfers the gravity to the first cushion block 1 directly below, and the first cushion block 1 then transfers it to the vehicle frame bottom plate 03. The stress on the heat insulation plate 2 is reduced, and the stress on the suspended part of the heat insulation plate 2 is avoided, preventing uneven stress and cracking.

[0030] To realize the fixation of the vehicle-mounted battery heat insulation system relative to the vehicle, the first cushion block 1 relative to the heat insulation plate 2, the heat insulation plate 2 relative to the second cushion block 3, and the vehicle-mounted battery 4 relative to the second cushion block 3. The first cushion block 1 can be selected to be a metal cushion block as needed. The first cushion block 1 and the vehicle frame bottom plate 03 are fixed by welding. Through holes are provided on the heat insulation plate 2, and the first cushion block 1 and the second cushion block 3 pass through the through holes and are fixedly connected.

[0031] Specifically, vertical threaded holes are provided at the corresponding positions of the first cushion block 1 and the second cushion block 3, and the threaded holes and the through holes are coaxially arranged, so that threaded fasteners can pass through the through holes and cooperate with the threaded holes to play a role in firmly connecting the first cushion block 1 and the second cushion block 3, and the heat insulation plate 2 is clamped in.

[0032] The settings of the threaded holes and the threaded fasteners mainly have the following two forms:

[0033] The first: The threaded hole of the first cushion block 1 is vertically provided on the upper end surface of the first cushion block 1. The threaded hole of the second cushion block 3 penetrates through the height (thickness) direction of the second cushion block 3. The threaded fastener uses a conventional bolt, and a counterbore coaxial with the threaded hole is provided on the upper end surface of the second cushion block 3. When the bolt is tightened to connect the first cushion block 1 and the second cushion block 3, the bolt is submerged in the counterbore on the upper end surface of the second cushion block 3 to ensure the flatness of the upper end surface of the second cushion block 3;

[0034] The second: The threaded holes are respectively provided on the upper end surface of the first cushion block 1 and the lower end surface of the second cushion block 3, and both are blind holes, that is, the threaded holes do not penetrate through the first cushion block 1 and the second cushion block 3. At this time, the threaded fastener can use a stud.

[0035] The vehicle-mounted battery 4 is directly placed on the second cushion block 3 and is fixed by its own gravity and the friction force with the second cushion block 3. Since limiting mechanisms are provided at the parts of the vehicle where the vehicle-mounted battery 4 is installed, the side part of the vehicle-mounted battery 4 can be limited by the limitation of the installation space of the vehicle-mounted battery itself in the vehicle, avoiding the shaking of the vehicle-mounted battery 4 in the front-back, left-right directions, and the second cushion block 3 only plays a vertical bearing role.

[0036] The main function of the heat insulation board 2 is to isolate heat, and the setting can be processed and manufactured by using existing common materials. In the above specific embodiment, the heat insulation board 2 is specifically processed from a sheet metal plate 22 and heat insulation cotton 21. The heat insulation cotton 21 is arranged on the lower layer of the sheet metal plate 22 to isolate heat, and the sheet metal plate 22 plays a certain bearing role. The heat insulation cotton 21 is adhered and fixed on the lower layer of the sheet metal plate 22 by using glue.

[0037] The second cushion block 3 adopts an elastic buffer cushion block, such as a rubber buffer cushion block, etc., which can play a certain buffer protection role for the vehicle-mounted battery 4 and reduce the vibration of the vehicle-mounted battery 4.

[0038] In another specific embodiment provided by the present invention, the connection manner of the first cushion block 1, the heat insulation board 2 and the second cushion block 3 is as follows: the heat insulation board 2 is provided with a through hole, and the opposite end faces of the first cushion block 1 and the second cushion block 3 are respectively provided with a convex part and a concave part that cooperate with each other. The convex part and the concave part can be provided with mutually cooperating threads, so that the convex part can pass through the through hole and cooperate with the concave part to realize the fitting and fixing of the first cushion block 1 and the second cushion block 3. In other words, at this time, neither the first cushion block 1 nor the second cushion block 3 adopts a regular block shape, but a positioning connection mechanism that cooperates with each other is provided on the upper end face of the first cushion block 1 and the lower end face of the second cushion block 3.

[0039] Obviously, the first cushion block 1 can not only adopt the strip-shaped cushion block as described in the above embodiment, but also adopt a cubic cushion block with the same specification as the second cushion block 3.

[0040] Generally speaking, after a certain number of years, the heat insulation performance of the heat insulation board 2 will decrease. In order to prevent the heat from being transferred to the vehicle-mounted battery 4 after the heat insulation performance of the heat insulation board 2 decreases, the present invention particularly sets the height of the second cushion block 3 to be greater than the height of the first cushion block 1, that is, the height of the second heat dissipation channel is greater than the height of the first heat dissipation channel, and the heat transferred to the vehicle-mounted battery 4 is reduced by improving the heat dissipation capacity of the second heat dissipation channel. At the same time, the above-mentioned second cushion block 3 and heat insulation board 2 both adopt a detachable installation setting method, and the heat insulation board 2 and the second cushion block 3 can be replaced regularly according to needs, and the first heat dissipation channel and the second heat dissipation channel can be cleaned to ensure the heat insulation and heat dissipation capacity.

[0041] The present invention also provides an electric vehicle, including the vehicle-mounted battery heat insulation system described in any of the above embodiments. In particular, the electric vehicle may specifically be an electric forklift. The electric forklift is provided with a hydraulic oil tank 01 for driving the lifting of the forklift fork and a traveling motor 02 for driving the electric forklift to travel. Above the hydraulic oil tank 01 and the traveling motor, there is a frame bottom plate 03. The first cushion block 1 is welded above the frame bottom plate 03, that is, the vehicle-mounted battery 4 is arranged above the traveling motor 02 and the hydraulic oil tank 01, and heat dissipation is carried out through the first heat dissipation channel, the heat insulation plate 2 and the second heat dissipation channel to prevent the vehicle-mounted battery 4 from overheating. Other parts of the electric forklift may refer to the prior art and will not be elaborated here.

[0042] The electric forklift provided by the present invention does not improve the structural layout of the existing electric forklift, but forms a heat insulation system for heat insulation of the vehicle-mounted battery 4 by installing the first cushion block 1, the heat insulation plate 2 and the second cushion block 3, and isolates and dissipates the heat of the hydraulic oil tank 01 and the traveling motor 02 through the first heat dissipation channel, the heat insulation plate 2 and the second heat dissipation channel to prevent the vehicle-mounted battery 4 from overheating.

[0043] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0044] The above has introduced in detail the electric vehicle provided by the present invention and its vehicle-mounted battery heat insulation system. Specific examples are used in this article to elaborate on 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. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A vehicle-mounted battery heat insulation system, characterized in that, it is applied to an electric vehicle, specifically an electric forklift. The electric forklift includes a hydraulic oil tank (01), a traveling motor (02), and a frame bottom plate (03) provided above the hydraulic oil tank (01) and the traveling motor (02). The vehicle-mounted battery heat insulation system includes a vehicle-mounted battery (4), a first cushion block (1) used to be fixed on the frame bottom plate (03), a heat insulation plate (2) provided above the first cushion block (1), and a second cushion block (3) provided above the heat insulation plate (2). The first cushion block (1) is welded above the frame bottom plate (03), the vehicle-mounted battery (4) is placed above the second cushion block (3), and the height of the second cushion block (3) is greater than or equal to the height of the first cushion block (1); a first heat dissipation channel is formed between the heat insulation plate (2) and the frame bottom plate (03), and a second heat dissipation channel is formed between the heat insulation plate (2) and the vehicle-mounted battery (4); the heat insulation plate (2) includes a sheet metal plate (22) located on the upper layer and a heat insulation cotton (21) located on the lower layer, and the heat insulation cotton (21) is fixedly glued to the sheet metal plate (22).

2. The vehicle-mounted battery heat insulation system according to claim 1, characterized in that, the first cushion block (1) is a strip-shaped cushion block, the first cushion block (1) is arranged in parallel at both ends in the length direction of the heat insulation plate (2), and the orthographic projection of the second cushion block (3) is located directly above the first cushion block (1).

3. The vehicle-mounted battery heat insulation system according to claim 2, characterized in that, through holes are formed in the part of the heat insulation plate (2) that fits the first cushion block (1), and the second cushion block (3) is fixedly connected to the first cushion block (1) through the through holes.

4. The vehicle-mounted battery heat insulation system according to claim 3, characterized in that, both the first cushion block (1) and the second cushion block (3) are provided with threaded holes coaxially arranged with the through holes, and threaded fasteners connecting the first cushion block (1) and the second cushion block (3) are arranged in the threaded holes.

5. The vehicle-mounted battery heat insulation system according to claim 4, characterized in that, the through holes, the threaded holes, and the second cushion blocks (3) are all in four groups, the heat insulation plate (2) is a rectangular plate, and the second cushion blocks (3) are correspondingly arranged at the four corners of the heat insulation plate (2).

6. The vehicle-mounted battery heat insulation system according to claim 5, characterized in that, the second cushion block (3) is a rubber buffer cushion block.

7. An electric vehicle, characterized in that, it includes the vehicle-mounted battery heat insulation system according to any one of claims 1 to 6.

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