New energy automobile battery case

Abstract

The invention relates to a new energy automobile battery case, and relates to the technical field of new energy automobile batteries, the case comprises a protection device, and the protection device comprises a base used for being connected with an automobile; the bottom of the mounting box is connected with the base through an elastic buffer mechanism, a buffer cavity is formed among the mounting box, the elastic buffer mechanism and the base, and heat dissipation cavities communicated with the buffer cavity are formed in the bottom and the side wall of the mounting box; and the plugging assembly is used for plugging the mounting opening and cooling the battery main body. When the base vibrates, the battery main body is buffered through cooperation of the cooling liquid and the elastic buffer mechanism, the risk that the mounting box and the battery main body vibrate is reduced, and the base and the mounting box move relatively to change the size of the buffer cavity, so that the cooling liquid is driven to flow in the buffer cavity and the heat dissipation cavity; and the flowing of the cooling liquid further improves the heat dissipation effect on the battery main body, so that the service life and the safety of the battery are improved.

Description

Technical Field

[0001] This application relates to the technical field of new energy vehicles, especially to the battery chassis of new energy vehicles. Background Art

[0002] New energy vehicles refer to vehicles that use unconventional vehicle fuels as power sources and integrate advanced technologies in vehicle power control and drive, forming vehicles with advanced technical principles, new technologies, and new structures. In order to protect new energy vehicle batteries, generally, new energy vehicle batteries are installed inside battery protection boxes for new energy vehicles.

[0003] New energy vehicles include pure electric vehicles, range-extended electric vehicles, hybrid vehicles, fuel cell electric vehicles, hydrogen engine vehicles, and other new energy vehicles. Existing pure electric vehicles generally use lithium batteries as energy storage power sources, providing electrical energy from the batteries to the electric motors to drive the motors to operate, thereby pushing the vehicle to move forward.

[0004] During the driving process of the vehicle, when encountering bumpy road conditions, the battery is prone to being damaged by bumps inside the vehicle. When the vehicle is impacted, the battery may also catch fire, with relatively low safety. Moreover, when the vehicle is driving, the battery is always in an operating state, generating a large amount of heat, and the heat dissipation effect of the battery is average. Therefore, the lifespan and safety of the battery are reduced. Summary of the Invention

[0005] In order to improve the lifespan and safety of the battery, this application provides a battery chassis for new energy vehicles.

[0006] The battery chassis for new energy vehicles provided by this application adopts the following technical solutions: The battery chassis for new energy vehicles includes a protection device for protecting the battery body. The protection device includes: A base for connecting with the vehicle; An installation box, the bottom of which is connected to the base through an elastic buffer mechanism and has an installation opening formed at the top. The battery body is placed in the installation box through the installation opening for protection. The installation box is made of a metal material and abuts against multiple side walls of the battery body for heat dissipation. A buffer cavity is formed between the bottom of the installation box and the upper surface of the elastic buffer mechanism and the base. Heat dissipation cavities filled with coolant are provided on both the bottom and side walls of the installation box and are communicated with the buffer cavity. When the installation box and the base move relative to each other, they are buffered by the elastic buffer mechanism, and the coolant in the buffer cavity and the heat dissipation cavity is pushed to flow, and the volume change of the buffer cavity is realized; A plugging component, which is arranged on the installation box and is used for plugging the installation opening and for dissipating heat from the battery body.

[0007] By adopting the above technical solution, the sealing component is opened, the battery body is placed into the installation box through the installation opening, and then the sealing component seals the installation opening, thereby installing the battery body into the installation box. The base is fixedly installed on the vehicle. Alternatively, the base is first fixedly installed on the vehicle, and then the battery body is installed into the installation box. The coolant located in the buffer cavity and the heat dissipation cavity can dissipate heat from and cool the battery body.

[0008] During the operation of the vehicle, vibrations occur, causing the base to vibrate. When the base vibrates, elastic buffering is performed through the elastic buffering mechanism. The coolant supports the installation box to provide a supporting force, enabling the coolant and the elastic buffering mechanism to cooperate to buffer the installation box and the battery body, reducing the risk of vibration of the installation box and the battery body. Moreover, when the base and the installation box move relatively, the size of the buffer cavity changes, thereby driving the coolant to flow in the buffer cavity and the heat dissipation cavity. The flow of the coolant further improves the heat dissipation effect on the battery body, enhancing the battery life and safety.

[0009] When the vehicle is impacted, an impact force is first generated on the side wall of the installation box. The presence of the coolant can also support and buffer the impact force. When the installation box is deformed by the impact, the heat dissipation cavity becomes smaller, causing the coolant to fill the heat dissipation cavity and the buffer cavity, thereby achieving hydraulic buffering of the impact force, greatly improving the protection effect on the battery, and further reducing the battery life. Even when the installation box is damaged, the coolant splashes towards the battery or the vehicle under the action of the impact force, thereby further greatly reducing the risk of combustion of the battery and the vehicle, thus greatly enhancing the battery life and safety.

[0010] Optionally, the elastic buffering mechanism includes: A first buffer member and a second buffer member, which are respectively arranged on the base and the installation box and are slidably connected to each other. The buffer cavity is formed by the cooperation among the first buffer member, the second buffer member, the installation box, and the base; A plurality of elastic components, which are arranged on the installation box at intervals and are connected to the base and are used to buffer the installation box under the action of elastic force.

[0011] By adopting the above technical solution, the first buffer member and the second buffer member are slidably connected to each other and cooperate with the base and the installation box to form a buffer cavity for storing the coolant. At the same time, the coolant also enters the heat dissipation cavity, thereby achieving buffering and heat dissipation.

[0012] When the base vibrates, multiple elastic components can buffer the vibration of the base. At the same time, relative movement occurs between the base and the installation box, causing the first buffer member and the second buffer member to move relative to each other. The coolant buffers the relative movement between the base and the installation box. At the same time, after being squeezed, the coolant will flow in the buffer cavity and the heat dissipation cavity. The flowing coolant enables faster and better heat dissipation. And because the coolant will flow when it is squeezed, the risk of leakage at the connection of the first buffer member and the second buffer member is reduced. Thus, when the coolant buffers and cools the battery body, the effect is more stable, further improving the life and safety of the battery.

[0013] Optionally, the elastic component includes: A buffer rod, which is arranged on the base and slidably installed on the installation box; A spring, which is sleeved on the buffer rod and its two ends are pressed against the base and the installation box; A fixing nut, which is threadedly connected to the buffer rod and abuts against the installation box for positioning.

[0014] By adopting the above technical solution, the installation box presses against the spring under the action of gravity. When the base vibrates up and down, a force is generated on the spring. The fixing nut enables the installation box to move downward, and makes the installation box abut against the fixing nut so that it cannot move upward, thereby restricting the position of the installation box. At the same time, the spring can be replaced after the fixing nut is removed, improving the buffering effect and the life and safety of the battery.

[0015] Optionally, when the battery body is placed in the installation box, its top extends above the installation box. The sealing component includes: A sealing ring, which is snap-fitted on the top of the installation box, extends above the battery body and is fixedly connected to the installation box through a screw and nut; A sealing plate, which is arranged on the top of the sealing ring and is made of the same metal material as the sealing ring and cooperates with the sealing ring to seal the installation opening.

[0016] By adopting the above technical solution, when the battery body is installed in the installation box, its top extends above the installation box, which is convenient for subsequently removing the battery body for replacement. The sealing ring is snap-fitted downward onto the top of the installation box for positioning, and finally the sealing ring is fixed by cooperating with the screw and nut. Thus, the sealing plate, the sealing ring and the installation box cooperate to protect the battery body. At the same time, the sealing plate, the sealing ring and the installation box are all made of metal materials, so they can have good heat conduction and heat dissipation effects, further improving the heat dissipation effect of the battery body and the life and safety of the battery.

[0017] Optionally, the plugging plate and the plugging ring are provided with a plugging cavity communicating with the heat dissipation cavity. The inner side walls of the plugging ring and the plugging plate are in contact with the battery body. The coolant in the buffer cavity enters the plugging cavity located on the plugging plate and leaves a flow space for the coolant to flow, so as to cool the battery body and buffer external forces.

[0018] By adopting the above technical solution, in the normal state, that is, when the base does not vibrate or vibrates very little, the coolant enters the plugging cavity located on the plugging plate after passing through the plugging cavity located in the plugging ring, and a flow space is formed between the coolant and the top of the plugging cavity, so that this part of the coolant is located on the side close to the top of the battery body, thereby enabling heat dissipation and cooling of the heat at the top of the battery body. At the same time, the coolant in the plugging cavity on the plugging ring can dissipate heat from the side wall of the battery body close to its top, and also enables the heat dissipation cavity and the buffer cavity to be filled with coolant, so that the coolant can wrap the battery body. When the coolant needs to flow, the design of the flow space enables the coolant to flow, so as to meet the requirement of coolant flow to improve heat dissipation, and at the same time greatly increases the amount of coolant, further improving the life and safety of the battery.

[0019] Optionally, the spring pushes the installation box upward and makes the fixing nut press against the installation box for positioning. After the fixing nut is removed from the buffer rod, the installation box and the buffer member II move upward under the action of the spring, and the coolant in the plugging cavity flows back into the heat dissipation cavity for storage.

[0020] By adopting the above technical solution, when the plugging ring needs to be replaced, rotate the fixing nut away from the installation box, and the spring can push the installation box and the buffer member II upward, thereby increasing the size of the buffer cavity, enabling the coolant in the plugging cavity to flow downward into the heat dissipation cavity for storage, so as to facilitate the disassembly and replacement of the plugging ring and the plugging plate, reducing the risk of coolant outflow loss. After the plugging ring is fixedly installed on the installation box, rotate the fixing nut to push the installation box and the buffer member II downward, thereby reducing the size of the buffer cavity, enabling the coolant to flow into the plugging cavity, improving the convenience during installation while reducing coolant loss.

[0021] At the same time, after the plugging ring is removed, coolant can also be filled into the heat dissipation cavity, then the plugging ring is installed, and the fixing nut is rotated downward to its original position, thereby pushing the coolant in the heat dissipation cavity into the plugging cavities located on the plugging ring and the plugging plate. Therefore, there is no need to additionally provide a structure for adding and discharging coolant on the plugging ring, making the structure simple and stable.

[0022] Optionally, a sealing ring pressing against the plugging ring is snap-fitted on the installation box. The sealing ring extends to the inner side of the connection between the plugging cavity and the heat dissipation cavity and forms a sealing hole for the coolant to pass through inside.

[0023] By adopting the above technical solution, when the base receives a large impact force, the base moves upward rapidly, pushing the coolant to flow rapidly in the buffer cavity. The design of the sealing holes will slow down the flow rate of the coolant, thereby increasing the supporting force on the installation box. When the base moves downward, the liquid in the plugging cavity can flow back to the heat dissipation cavity through the fixing holes, reducing the risk of battery damage and improving the battery life and safety.

[0024] Optionally, a heat dissipation mechanism communicating with the heat dissipation cavity is provided on the side wall of the installation box for heat dissipation. The heat dissipation mechanism includes: A plurality of heat dissipation fins, which are spaced and inserted on the outer side wall of the installation box and extend into the heat dissipation cavity; A positioning component for positioning the plurality of heat dissipation fins.

[0025] By adopting the above technical solution, the plurality of heat dissipation fins can better transfer the heat in the coolant, further improving the heat dissipation and cooling effect of the coolant on the battery. At the same time, after the positioning component is unlocked, the plurality of heat dissipation fins can be removed for replacement, thereby further improving the battery life and safety.

[0026] Optionally, the positioning component includes: A positioning plate, which is arranged on the plurality of heat dissipation fins and abuts against the outer side wall of the installation box for positioning; A positioning screw, which passes through the positioning plate and is threadedly connected to the installation box for positioning.

[0027] By adopting the above technical solution, the heat dissipation fins are inserted and installed on the outer side wall of the installation box, and the positioning plate is pushed to abut against the outer side wall of the installation box for positioning. Finally, the positioning screw passes through the positioning plate and is threadedly connected to the installation box for positioning, thereby realizing the fixation of the plurality of heat dissipation fins. At the same time, the positioning plate abuts against the outer side wall of the installation box, so that the connection between the heat dissipation fins and the installation box can be sealed, thereby blocking the leakage of the coolant and reducing the loss of the coolant while installing the plurality of heat dissipation fins.

[0028] Optionally, a sealing ring that is pressed against the installation box under the pushing action of the positioning plate is sleeved on the plurality of heat dissipation fins.

[0029] By adopting the above technical solution, the loss of the coolant is further reduced.

[0030] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the base vibrates, the cooperation of the coolant and the elastic buffer mechanism realizes the buffering of the battery body, reducing the risk of vibration of the installation box and the battery body. Moreover, when the base and the installation box move relatively, the size of the buffer cavity changes, driving the coolant to flow between the buffer cavity and the heat dissipation cavity. The flow of the coolant further improves the heat dissipation effect on the battery body, enhancing the battery's lifespan and safety.

[0031] 2. When the vehicle collides, an impact force is first generated on the side wall of the installation box. The presence of the coolant can also support and buffer the impact force. When the installation box is deformed by the impact, the heat dissipation cavity becomes smaller, causing the coolant to fill the heat dissipation cavity and the buffer cavity, thereby achieving hydraulic buffering of the impact force, greatly improving the protection effect on the battery, and further reducing the battery's lifespan. Even when the installation box is damaged, the coolant splashes towards the battery or the vehicle under the action of the impact force, further greatly reducing the risk of combustion of the battery and the vehicle, thus significantly enhancing the battery's lifespan and safety.

[0032] 3. By rotating the fixing nut, the installation box and the buffer part II move upward, increasing the size of the buffer cavity, enabling the coolant in the plugging cavity to flow downward into the heat dissipation cavity for storage, facilitating the disassembly and replacement of the plugging ring and the plugging plate, and reducing the risk of coolant leakage. After fixing the plugging ring to the installation box, rotating the fixing nut pushes the installation box and the buffer part II downward, reducing the size of the buffer cavity, causing the coolant to flow into the plugging cavity, improving the convenience during installation while reducing coolant loss. Description of the Drawings

[0033] Figure 1 is a three-dimensional structural schematic diagram of the chassis; Figure 2 is a partial exploded view of the chassis; Figure 3 is Figure 2 the sectional schematic diagram of A - A in Figure 4 is Figure 3 the enlarged schematic diagram of part B in

[0034] Reference signs: 1, battery main body; 2, protection device; 21, base; 22, installation box; 23, installation opening; 24, buffer cavity; 25, heat dissipation cavity; 26, fixing block; 27, clamping groove; 28, installation hole; 3, plugging assembly; 31, plugging ring; 32, plugging plate; 33, plugging cavity; 34, insertion section; 35, connection section; 4, elastic buffer mechanism; 41, first buffer member; 42, second buffer member; 5, elastic assembly; 51, buffer rod; 52, spring; 53, fixing nut; 6, sealing ring; 61, sealing hole; 7, heat dissipation mechanism; 71, heat dissipation fins; 8, positioning assembly; 81, positioning plate; 82, positioning screw. Detailed implementation manners

[0035] The following further elaborates on this application in detail.

[0036] The embodiment of this application discloses a battery case for a new energy vehicle.

[0037] Referring to Figures 1 - 3 , the battery case for a new energy vehicle includes a protection device 2 for protecting the battery main body 1.

[0038] The protection device 2 includes a base 21, an installation box 22, and a plugging assembly 3. The base 21 is used to connect with the vehicle and is designed according to different installation positions and requirements. The upper surface of the base 21 is horizontal. The bottom of the installation box 22 is connected to the upper surface of the base 21 through an elastic buffer mechanism 4, and an installation opening 23 is formed at the top. The battery main body 1 is placed in the installation box 22 through the installation opening 23 for protection. The installation box 22 is made of a metal material and abuts against multiple side walls of the battery main body 1 for heat dissipation. The installation box 22 can be made of a metal material with high strength and good heat conduction, and the material is designed according to needs. The material can be iron, steel, or alloy material, etc.

[0039] The installation box 22 is in the shape of a cuboid or a cube. A buffer cavity 24 is formed between the bottom of the installation box 22, the elastic buffer mechanism 4, and the base 21. Heat dissipation cavities 25 filled with coolant are formed on both the bottom and the side walls of the installation box 22 and are communicated with the buffer cavity 24. When the installation box 22 and the base 21 move relative to each other, they are buffered by the elastic buffer mechanism 4, and the coolant in the buffer cavity 24 and the heat dissipation cavities 25 is pushed to flow, and the volume change of the buffer cavity 24 is realized.

[0040] Referring to Figures 1 - 3, the elastic buffer mechanism 4 includes a first buffer member 41, a second buffer member 42, and a plurality of elastic components 5. The vertical projections of the first buffer member 41 and the second buffer member 42 are rectangular or square. The first buffer member 41 and the second buffer member 42 are of a housing structure and are respectively fixedly installed on the upper surface of the base 21 and the bottom of the installation box 22. The first buffer member 41 is slidably sleeved on the outer side wall of the second buffer member 42 for positioning. An annular installation groove is formed on the upper surface of the first buffer member 41, and a leak-proof ring is snap-fitted on the installation groove. The leak-proof ring is sleeved on the outer side wall of the second buffer member 42 and is used to seal the connection between the first buffer member 41 and the second buffer member 42.

[0041] The buffer cavity 24 is formed by the cooperation of the first buffer member 41, the second buffer member 42, the upper surface of the base 21 and the bottom of the installation box 22. Heat dissipation cavities 25 are formed on the side walls of the four installation boxes 22, and two adjacent heat dissipation cavities 25 are interconnected. The bottoms of the four heat dissipation cavities 25 are connected to the heat dissipation cavity 25 located at the bottom of the installation box 22, and the heat dissipation cavity 25 located at the bottom of the installation box 22 is connected to the top of the buffer cavity 24, so as to realize the interconnection of the five heat dissipation cavities 25 and the buffer cavity 24.

[0042] Two fixing blocks 26 are arranged at intervals at the bottoms of both ends of the installation box 22. The plurality of elastic components 5 are arranged in one-to-one correspondence with the four fixing blocks 26, and the plurality of elastic components 5 are connected to the base 21 and are used to buffer the installation box 22 under the action of elastic force. The elastic component 5 includes a buffer rod 51, a spring 52, and a fixing nut 53. The buffer rod 51 is fixedly installed on the upper surface of the base 21, and the buffer rod 51 is in a vertical state and vertically slides through the fixing block 26; the spring 52 is sleeved on the buffer rod 51 and its two ends are pressed against the base 21 and the fixing block 26 for positioning, and the fixing nut 53 is threadedly connected to the buffer rod 51 and pressed against the upper surface of the fixing block 26 for positioning.

[0043] Referring to Figures 2 - 4 , when the battery body 1 is placed in the installation box 22, the side wall of the battery body 1 abuts against the four inner side walls of the installation box 22 and the top extends above the installation box 22. The four heat dissipation cavities 25 are connected to the top of the installation box 22 and are provided with interconnected clamping grooves 27 at the top.

[0044] The plugging component 3 includes a plugging ring 31 and a plugging plate 32. The plugging ring 31 includes an insertion section 34 and a connection section 35 that are both annular and interconnected. The insertion section 34 is snap-fitted on the four clamping grooves 27 and the top end extends above the clamping grooves 27. The connection section 35 is located at the top end of the insertion section 34, and the top of the connection section 35 extends above the battery body 1. The connection section 35 is fixedly connected to the top of the installation box 22 by a screw nut or a screw.

[0045] The plugging plate 32 is integrally arranged at the top of the connection section 35 to plug the installation opening 23. The plugging ring 31, the plugging plate 32 and the installation box 22 cooperate to form a protective space for protecting the battery main body 1. The four side walls and the inner top wall of the connection section 35 are in contact with the top of the side wall of the battery main body 1. The plugging plate 32 and the plugging ring 31 are provided with a plugging cavity 33, and the plugging cavity 33 communicates with the bottom of the plugging plate 32 and is used to communicate with the four heat dissipation cavities 25.

[0046] A plurality of springs 52 are sleeved on a plurality of buffer rods 51. The plurality of buffer rods 51 pass through a plurality of fixing blocks 26. The plurality of fixing blocks 26 are pressed against the plurality of springs 52 under the action of gravity. A plurality of fixing nuts 53 are threadedly connected to the plurality of buffer rods 51. The fixing nuts 53 are screwed to press against the fixing blocks 26 and push the fixing blocks 26 and the installation box 22 down to a specified position. At the same time, a torque wrench can be used to screw the fixing nuts 53. When the fixing nuts 53 reach a certain torque, the fixing nuts 53 cannot be screwed any further, so as to make the pressure of the plurality of fixing nuts 53 on the plurality of fixing blocks 26 balanced, thereby completing the replacement and installation of the plurality of springs 52.

[0047] During the process of replacing the spring 52, the installation box 22 and the second buffer member 42 are pushed downwards, reducing the space of the buffer cavity 24. Since the buffer cavity 24 and the plurality of heat dissipation cavities 25 are filled with coolant, thereby pushing the coolant in the heat dissipation cavity 25 to flow into the plugging cavity 33 on the plugging ring 31 and the plugging plate 32. A flow space for the coolant to flow is formed between the liquid level of the coolant and the top of the plugging cavity 33. At this time, the protection device 2 is in the initial state.

[0048] Before the plugging ring 31 and the plugging plate 32 need to be replaced, the fixing nuts 53 are screwed away from the fixing blocks 26 and moved above the fixing blocks 26. The installation box 22 and the second buffer member 42 move upwards under the elastic force of the springs 52, thereby increasing the space of the buffer cavity 24, so that the coolant in the plugging cavity 33 on the plugging ring 31 and the plugging plate 32 all flows into the heat dissipation cavity 25 under the action of gravity, greatly reducing the coolant in the plugging cavity 33. That is, when the plugging ring 31 is removed, the risk of coolant loss in the plugging cavity 33 is reduced. At this time, coolant can also be filled into the heat dissipation cavity 25. After connecting the plugging ring 31 to the installation box 22, the fixing nuts 53 are screwed down to the original position. The fixing nuts 53 are screwed down to push the installation box 22 and the second buffer member 42 downwards, thereby pushing the coolant in the heat dissipation cavity 25 to flow into the plugging cavity 33 on the plugging ring 31 and the plugging plate 32, saving coolant and facilitating the addition of coolant at the same time.

[0049] A sealing ring 6 is snap-fitted and installed at the bottom of the clamping groove 27. The insertion section 34 presses against the sealing ring 6 for positioning. The sealing ring 6 extends to the connection between the heat dissipation cavity 25 and the plugging cavity 33, and a sealing hole 61 for the coolant to pass through is formed inside. The coolant in the heat dissipation cavity 25 is extruded and then passes through the sealing hole 61, generating an extrusion force on the sealing ring 6. The sealing hole 61 becomes larger to facilitate the passage of the coolant. The design of the sealing hole 61 can produce a blocking effect on the flow of the coolant, thereby slowing down the flow rate of the coolant and increasing the supporting force on the installation box 22. When it is necessary to remove the plugging ring 31 and the plugging plate 32, turn the fixing nut 53 upward, the buffer cavity 24 increases, so that the coolant in the plugging cavity 33 flows back into the heat dissipation cavity 25 through the sealing hole 61.

[0050] Connect the base 21 to the vehicle. The coolant located in the buffer cavity 24, the heat dissipation cavity 25, and the plugging cavity 33 can dissipate heat and cool the battery body 1. When the vehicle runs and the base 21 vibrates up and down, multiple springs 52 can buffer the installation box 22 and the battery body 1. At the same time, the coolant also buffers the bottom of the installation box 22 and the battery body 1. Moreover, the up and down vibration of the base 21 also pushes the coolant to flow mutually in the buffer cavity 24, the heat dissipation cavity 25, and the plugging cavity 33, thereby further accelerating the cooling effect of the coolant on the battery body 1.

[0051] When the vehicle is impacted, the impact force will act on any side wall of the installation box 22 or the upper surface of the plugging plate 32. The coolant located in the buffer cavity 24, the heat dissipation cavity 25, and the plugging cavity 33 can buffer the impact force. When the installation box 22 and / or the plugging plate 32 are impacted and deformed, the space where the coolant is located is reduced, causing the coolant to concentrate until all the spaces are filled, thereby realizing the buffering of the impact force by the liquid, greatly improving the service life of the battery. Moreover, when the installation box 22 and / or the plugging plate 32 are damaged by impact, part of the coolant can move towards the battery body 1 and the vehicle under the action of the impact force. The coolant drops on the battery body 1 and / or the vehicle, thereby further reducing the probability of combustion of the battery body 1 and the vehicle and improving the service life and safety of the battery and the vehicle.

[0052] Refer to Figures 1 - 3 As shown in , a heat dissipation mechanism 7 for communicating with the inside of the heat dissipation cavity 25 for heat dissipation is provided on the side wall of the installation box 22. The heat dissipation mechanism 7 includes a plurality of heat dissipation fins 71 and a positioning assembly 8. A vertically long strip-shaped installation hole 28 is formed on the side wall of the installation box 22. The plurality of heat dissipation fins 71 are correspondingly arranged with the plurality of installation holes 28. The plurality of heat dissipation fins 71 pass through the installation holes 28 and extend into the heat dissipation cavity 25 to conduct out the heat of the coolant in the heat dissipation cavity 25 for heat dissipation; the positioning assembly 8 is used for positioning the plurality of heat dissipation fins 71.

[0053] The positioning component 8 includes a positioning plate 81 and positioning screws 82. A plurality of heat dissipation fins 71 pass through the positioning plate 81 and are fixedly installed on the positioning plate 81. Elastic sealing rings are sleeved on the plurality of heat dissipation fins 71. At the same time, the positioning plate 81 pushes the sealing rings to press against the side wall of the installation box 22 for positioning; the positioning screws 82 pass through the positioning plate 81 and are threadedly connected to the installation box 22, thereby realizing the fixation of the plurality of heat dissipation fins 71.

[0054] The working principle of the embodiment of the present application is as follows: Connect the base 21 to the vehicle. The coolant located in the buffer chamber 24, the heat dissipation chamber 25, and the blocking chamber 33 can dissipate heat from the battery body 1. At the same time, the plurality of heat dissipation fins 71 can dissipate heat from the coolant, thereby further improving the heat dissipation and cooling effect on the battery body 1.

[0055] When the vehicle runs and the base 21 vibrates up and down, the plurality of springs 52 and the coolant can cooperate to buffer the bottom of the installation box 22 and the battery body 1. Moreover, the up and down vibration of the base 21 also pushes the coolant to flow mutually in the buffer chamber 24, the heat dissipation chamber 25, and the blocking chamber 33, thereby further accelerating the cooling effect of the coolant on the battery body 1.

[0056] When the vehicle is impacted, the impact force acts on any side wall of the installation box 22 or the upper surface of the blocking plate 32. The coolant located in the buffer chamber 24, the heat dissipation chamber 25, and the blocking chamber 33 can buffer the impact force. When the installation box 22 and / or the blocking plate 32 are impacted and deformed, the space where the coolant is located is reduced, causing the coolant to concentrate until all spaces are filled, thereby realizing the buffering of the impact force by the liquid, greatly improving the battery life. Moreover, when the installation box 22 and / or the blocking plate 32 are damaged by impact, part of the coolant can move towards the battery body 1 and the vehicle under the action of the impact force, and the coolant drops on the battery body 1 and / or the vehicle, thereby further reducing the probability of combustion of the battery body 1 and the vehicle, and improving the life and safety of the battery and the vehicle.

[0057] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited accordingly. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. New energy vehicle battery chassis, characterized in that: It includes a protection device (2) for protecting the battery body (1), and the protection device (2) includes: A base (21) for connecting to an automobile; An installation box (22) whose bottom is connected to the base (21) through an elastic buffer mechanism (4) and whose top forms an installation opening (23). The battery body (1) is placed in the installation box (22) through the installation opening (23) for protection. The installation box (22) is made of a metal material and abuts against multiple side walls of the battery body (1) for heat dissipation. A buffer cavity (24) is formed between the bottom of the installation box (22), the elastic buffer mechanism (4), and the upper surface of the base (21). Heat dissipation cavities (25) filled with coolant are provided on both the bottom and side walls of the installation box (22) and are communicated with the buffer cavity (24). When the installation box (22) and the base (21) move relative to each other, they are buffered by the elastic buffer mechanism (4), and the coolant in the buffer cavity (24) and the heat dissipation cavity (25) is pushed to flow, and the volume change of the buffer cavity (24) is realized; A plugging assembly (3) arranged on the installation box (22) for plugging the installation opening (23) and for dissipating heat from the battery body (1).

2. The new energy vehicle battery chassis according to claim 1, characterized in that: The elastic buffer mechanism (4) includes: A first buffer member (41) and a second buffer member (42) which are respectively arranged on the base (21) and the installation box (22) and are slidably connected to each other. The buffer cavity (24) is formed by the cooperation between the first buffer member (41), the second buffer member (42), the installation box (22), and the base (21); A plurality of elastic components (5) which are arranged on the installation box (22) at intervals and are connected to the base (21) and are used for buffering the installation box (22) under the action of elastic force.

3. The new energy vehicle battery chassis according to claim 2, characterized in that: The elastic component (5) includes: A buffer rod (51) arranged on the base (21) and slidably installed on the installation box (22); A spring (52) sleeved on the buffer rod (51) and having both ends pressed against the base (21) and the installation box (22); A fixing nut (53) threadedly connected to the buffer rod (51) and abutting against the installation box (22) for positioning.

4. The new energy vehicle battery chassis according to claim 3, characterized in that: When the battery body (1) is placed in the installation box (22), its top extends above the installation box (22). The plugging assembly (3) includes: A plugging ring (31) which is snap - fitted and installed on the top of the installation box (22), extends above the battery body (1), and is fixedly connected to the installation box (22) through a screw - nut; A plugging plate (32) arranged on the top of the plugging ring (31). Both the plugging plate (32) and the plugging ring (31) are made of a metal material and cooperate with the plugging ring (31) to plug the installation opening (23).

5. The new energy vehicle battery chassis according to claim 4, wherein: The plugging plate (32) and the plugging ring (31) are provided with a plugging cavity (33) communicated with the heat dissipation cavity (25). The inner side walls of the plugging ring (31) and the plugging plate (32) are in contact with the battery body (1). The coolant in the buffer cavity (24) enters the Plugging cavity (33) on the plugging plate (32) and leaves a flowing space for the coolant to flow, so as to cool the battery body (1) and buffer external forces.

6. The new energy vehicle battery chassis according to claim 5, characterized in that: The spring (52) pushes the mounting box (22) upward so that the fixing nut (53) presses against the mounting box (22) for positioning. After the fixing nut (53) is removed from the buffer rod (51), the mounting box (22) and the second buffer member (42) move upward under the action of the spring (52), and the coolant in the sealing cavity (33) flows back into the heat dissipation cavity (25) for storage.

7. The new energy vehicle battery chassis according to claim 5, characterized in that: A sealing ring (6) that presses against the sealing ring (31) is snap-fitted and mounted on the mounting box (22). The sealing ring (6) extends to the inner side of the connection between the sealing cavity (33) and the heat dissipation cavity (25), and a sealing hole (61) for the coolant to pass through is formed inside.

8. The battery chassis of a new energy vehicle according to claim 1, characterized in that: A heat dissipation mechanism (7) for communicating with the inside of the heat dissipation cavity (25) for heat dissipation is provided on the side wall of the mounting box (22). The heat dissipation mechanism (7) includes: A plurality of heat dissipation fins (71) are spaced and inserted and mounted on the outer side wall of the mounting box (22) and extend into the heat dissipation cavity (25); A positioning component (8) for positioning the plurality of heat dissipation fins (71).

9. The new energy vehicle battery chassis according to claim 8, characterized in that: The positioning component (8) includes: A positioning plate (81) is provided on the plurality of heat dissipation fins (71) and abuts against the outer side wall of the mounting box (22) for positioning; A positioning screw (82) passes through the positioning plate (81) and is threadedly connected to the mounting box (22) for positioning.

10. The new energy vehicle battery chassis according to claim 9, wherein: A sealing ring that is sleeved on the plurality of heat dissipation fins (71) and presses against the mounting box (22) for sealing under the pushing action of the positioning plate (81).

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