Composite multifunctional battery protection shell based on basalt fibers

Abstract

The invention relates to the technical field of battery protection, in particular to a composite multifunctional battery protection shell based on basalt fibers. Comprising a shell which is provided with a sealing cover in a sealing manner; the basalt fiber boards are slidably connected to the interiors of the adjacent inner walls of the shell, the basalt fiber boards divide the adjacent inner walls of the shell into a first cavity and a second cavity, the interior of the second cavity is in a vacuum state, an elastic telescopic sealing plate is slidably connected to the interior of the first cavity in a sealed mode, and the elastic telescopic sealing plate is connected to the interior of the second cavity in a sealed mode. The space, located on the upper side of the elastic telescopic sealing plate, of the first cavity is filled with a phase change heat storage agent. The strength of the shell is improved by arranging the basalt fiber board, the influence of external impact on the battery is reduced, and when the battery explodes, the explosion of the battery is buffered through the deformation of the basalt fiber board, so that the diffusion speed of gas and battery scraps in the shell to the periphery is reduced, and the service life of the battery is prolonged. Therefore, the splashing range of chips to the periphery after the battery explodes is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of battery protection, and in particular to a composite multifunctional battery protection shell based on basalt fiber. Background Art

[0002] Traditional battery protective cases are generally plastic protective cases or metal protective cases. Although plastic protective cases are light and low in cost, they are easily deformed in high temperature environments and do not have good fire resistance. Metal protective cases will increase their overall weight, which is not conducive to lightweight design. Therefore, a composite battery protective case is needed.

[0003] Basalt fiber is a new type of high-performance inorganic fiber material made from natural volcanic rock (mainly basalt) through high-temperature melting and drawing. Basalt fiber has the advantages of high strength, corrosion resistance, excellent thermal stability and electromagnetic shielding effect. Therefore, incorporating basalt fiber into the battery protective shell can provide the battery with composite multifunctional protection to enhance the battery's stability and safety.

[0004] In order to reduce the impact of external impact on the battery, the existing battery protective shell is generally hard. Once the battery produces thermal runaway due to excessive charging and discharging, a large amount of high-temperature and high-pressure gas will be generated inside the battery protective shell, which will cause the battery to explode during use. There is a risk of explosion. Once the battery explodes, a large amount of debris will be generated. The debris generated after the battery explosion will splash around, posing a threat to the life safety of people. Summary of the Invention

[0005] In order to overcome the shortcomings mentioned in the above background, the present invention provides a composite multifunctional battery protective shell based on basalt fiber.

[0006] The technical solution is as follows: A composite multifunctional battery protective case based on basalt fiber, comprising:

[0007] a housing, wherein a sealing cover is sealingly mounted on the housing;

[0008] There are four groups of protective components, which are respectively arranged at the four edges of the shell in the circumferential direction, and are used to protect the batteries stored in the shell. The protective components include:

[0009] A basalt fiber board is slidably connected to the adjacent inner walls of the shell. The basalt fiber board divides the adjacent inner walls of the shell into a first chamber and a second chamber. The second chamber is in a vacuum state. An elastic telescopic sealing plate is sealingly and slidably connected to the first chamber. A first elastic member is fixed between the elastic telescopic sealing plate and the shell. The space above the elastic telescopic sealing plate in the first chamber is filled with a phase change heat storage agent. A protective component is provided in the shell, and the protective component is used to provide emergency protection for the battery.

[0010] Preferably, the basalt fiber board is composed of a plurality of first supporting parts, a plurality of second supporting parts and a plurality of inclined connecting parts, the first supporting parts and the second supporting parts are staggered, the first supporting parts are closer to the interior of the shell than the adjacent second supporting parts, the connecting parts of the basalt fiber board are used to connect the adjacent first supporting parts and the adjacent second supporting parts, and the thickness of the second supporting parts is greater than the thickness of the first supporting parts.

[0011] Preferably, the protection component includes:

[0012] A support seat, fixedly connected to the bottom of the housing, the support seat being provided with four circumferentially distributed communication holes, the communication holes being in communication with the adjacent first chamber;

[0013] The piston rack has four parts, each of which is slidably connected to the adjacent communicating holes. A second elastic member is fixedly connected between the piston rack and the support seat. The support seat is slidably connected to four circumferentially distributed connecting plates. A net bag is fixedly connected between the connecting plate and the support seat. The piston rack is used to limit the adjacent connecting plates.

[0014] There are at least four rotating wheels distributed circumferentially, which are rotatably connected to the four circumferential edges of the shell respectively. A connecting rope is fixed between the rotating wheel and the adjacent connecting plate. The net bag and connecting rope of the connecting plate are made of fireproof material. A spring is fixed between the shell and the rotating wheel.

[0015] As a preference, it also includes:

[0016] There are four flexible blocks, which are respectively arranged in the inner walls at the four corners of the shell. The flexible blocks are located between two adjacent basalt fiber boards. The flexible blocks are fixed with sliding plates near the two adjacent basalt fiber boards. The sliding plates are fitted with the adjacent basalt fiber boards and are used to squeeze the adjacent elastic telescopic sealing plates.

[0017] Preferably, the piston rack is provided with an exhaust hole, and the bottom of the shell is provided with four gradient holes, and the exhaust holes are used to connect adjacent gradient holes with the interior of the shell.

[0018] Preferably, a recessed portion is provided at the bottom of the shell, the gradient hole is located on the recessed portion, and a plurality of circumferentially distributed exhaust portions are provided at the bottom of the shell.

[0019] Preferably, the width of the gradient hole gradually increases from a position close to the adjacent exhaust hole to a position far away from the exhaust hole.

[0020] As a preference, it also includes:

[0021] The number of the support bars is the same as that of the second support parts, and both are fixed to the housing. The support bars are fitted with adjacent second support parts to increase the support thickness of the second support parts.

[0022] Preferably, the support bar is elastic and wave-shaped, and can be bent and deformed only in the direction where two adjacent first support portions are located.

[0023] Preferably, the elastic coefficients of all the support bars on the same basalt fiber board increase successively from the support bar in the middle to the support bars on both sides.

[0024] Compared with the existing technology, the present invention has the following advantages: 1. The present invention improves the strength of the outer shell by providing a basalt fiberboard, reducing the impact of external impact on the battery. When the battery explodes, the deformation of the basalt fiberboard cushions the explosion, thereby slowing the diffusion rate of gas and battery debris in the outer shell to the surrounding area, thereby reducing the range of debris splashing after the battery explosion.

[0025] 2. When a battery explosion causes the outer shell and basalt fiberboard to rupture, the mesh bag on the connecting plate intercepts the shattered battery debris. The mesh bag on the connecting plate does not block the discharge of high-pressure gas, which relieves the pressure inside the outer shell while reducing the probability of injury caused by the splashing of battery debris, thereby improving the safety of the battery during use.

[0026] 3. The exhaust hole is driven to move by the piston holder. The higher the battery temperature, the larger the exhaust area between the exhaust hole and the adjacent gradient hole. The high-temperature and high-pressure gas generated by the battery temperature rise is discharged through the exhaust hole and the gradient hole. The gas discharge volume is adaptively adjusted according to the battery temperature to prevent the shell from being ruptured by high pressure due to the high-temperature and high-pressure gas in the shell.

[0027] 4. When the outer shell is subjected to external impact, the second support part is supported by the support bar to improve the strength of the second support part. When the outer shell is subjected to the explosion impact of the internal battery, the support bar is deformed, causing the basalt fiberboard to deform, increasing the volume inside the outer shell, thereby slowing down the leakage rate of high-pressure gas and battery debris in the outer shell, buffering the gas and battery debris, and thus reducing the probability of personal injury caused by the splashing of battery debris. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0029] Figure 2 is a sectional view of the three-dimensional structure of the housing of the present invention;

[0030] Figure 3 Schematic diagram of the three-dimensional structure of the flexible block of the present invention;

[0031] Figure 4 It is a schematic diagram of the three-dimensional structure of the support base of the present invention;

[0032] Figure 5 Schematic diagram of the three-dimensional structure of the connecting plate of the present invention;

[0033] Figure 6 Schematic diagram of the three-dimensional structure of the rotating wheel of the present invention;

[0034] Figure 7 Schematic diagram of the three-dimensional structure of the elastic telescopic sealing plate of the present invention;

[0035] Figure 8 This is an exploded view of the three-dimensional structure of the rotating wheel and the mainspring of the present invention;

[0036] Figure 9 Schematic diagram of the three-dimensional structure of the recessed portion of the present invention;

[0037] Figure 10 It is a schematic diagram of the three-dimensional structure of the support bar of the present invention.

[0038] Explanation of the reference numerals: 1-housing, 101-sealing cover, 2-protective component, 201-basalt fiber board, 202-first chamber, 203-second chamber, 204-elastic telescopic sealing plate, 205-support seat, 2051-connecting hole, 206-piston frame, 207-connecting plate, 208-rotating wheel, 209-spring, 3-flexible block, 301-sliding plate, 4-first supporting part, 5-second supporting part, 601-exhaust hole, 602-gradient hole, 701-recessed part, 702-exhaust part, 8-support bar. DETAILED DESCRIPTION

[0039] The following description is merely a preferred embodiment of the present invention and does not limit the scope of protection of the present invention.

[0040] A composite multifunctional battery protective shell based on basalt fiber, such as Figure 1-Figure 5 As shown, it includes: a shell 1, a sealing cover 101 is sealed and installed on the shell 1, the impact resistance of the sealing cover 101 is greater than the impact resistance of the shell 1, the battery is placed in the shell 1, and the sealing cover 101 is provided with positive and negative poles connected to the battery; a protective component 2, which has four groups and is respectively arranged at the four edges of the shell 1 in the circumference, for protecting the battery stored in the shell 1, and the protective component 2 includes: a basalt fiber board 201, which is slidably connected to the adjacent inner wall of the shell 1, and the basalt fiber board 201 is in the shape of a corrugated board. Taking the basalt fiber board 201 on the left as an example, the basalt fiber board on the left is The left side of 201 is in contact with the shell 1, and the right side of the left basalt fiber board 201 is not in contact with the shell 1. The basalt fiber board 201 separates the adjacent inner walls of the shell 1 into a first chamber 202 and a second chamber 203. The second chamber 203 is in a vacuum state. The second chamber 203 is filled with a storage liquid (such as ethylene glycol aqueous solution or silicone oil) for isolating cold air. The first chamber 202 is sealed and slidably connected with an elastic telescopic sealing plate 204. A first elastic member is fixed between the elastic telescopic sealing plate 204 and the shell 1, wherein the first elastic member is a compression spring. The first chamber 202 is located in the elastic telescopic sealing plate. The space on the upper side of the sealing plate 204 is filled with a phase change heat storage agent, wherein the phase change heat storage agent can be a salt hydrate containing paraffin. The salt hydrate has a high latent heat value and is suitable for storing heat energy in medium and low temperature environments to keep the battery warm. The phase change temperature of paraffin is around 55°C, and the maximum value of the optimal operating temperature of a lithium-ion battery is generally 40°C. When the temperature of a lithium-ion battery exceeds 60°C, the lithium-ion battery may enter a thermal runaway state. The phase change temperature of paraffin is close to the temperature at which the lithium-ion battery may enter a thermal runaway state. A protective component is provided in the outer shell 1, and the protective component is used to provide emergency protection for the battery. The basalt fiber board 201 is composed of a plurality of first support parts 4, a plurality of second support parts 5 and a plurality of inclined connecting parts. The first support parts 4 and the second support parts 5 are staggered. The first support parts 4 are closer to the internal first chamber 202 of the shell 1 than the adjacent second support parts 5. The connecting part of the basalt fiber board 201 is used to connect the adjacent first support parts 4 and the adjacent second support parts 5. The thickness of the second support parts 5 is greater than that of the first support parts 4, so that the basalt fiber board 201 is not easy to deform when the second support parts 5 are under pressure, and the basalt fiber board 201 is more likely to deform when the first support parts 4 are under pressure.

[0041] like Figure 3-Figure 8As shown, the protection component includes: a support seat 205, which is fixed to the bottom of the shell 1, and the support seat 205 is provided with four communicating holes 2051 distributed circumferentially, and the communicating holes 2051 are connected to the adjacent first chamber 202; a piston rack 206, which has four, respectively slidably connected to the adjacent communicating holes 2051, the shell 1 is a double-layer structure, the piston rack 206 slides in the double-layer structure of the shell 1, and there is a gap between the piston rack 206 and the inner layer of the shell 1, and a second elastic member is fixed between the piston rack 206 and the support seat 205, wherein the second elastic member is a tension spring, and the piston rack 206 consists of a piston portion that is located in the adjacent communicating holes 2051 and slides in a sealed manner, a baffle portion located on the upper side and a connecting portion connected to the second elastic member, and the support seat 205 is slidably connected to four connecting plates 207 distributed circumferentially, and the connecting plate 207 is connected to the support seat 2 05 is fixedly connected with a net bag, and the net bag of the connecting plate 207 is initially in a stacked state. After the connecting plate 207 moves upward, the net bag of the connecting plate 207 is stretched, and the baffle part of the piston frame 206 is used to limit the adjacent connecting plate 207; the rotating wheel 208 has at least four circumferentially distributed ones, which are rotatably connected to the four circumferential edges of the shell 1, and a connecting rope is fixedly connected between the rotating wheel 208 and the adjacent connecting plate 207. The net bag and the connecting rope of the connecting plate 207 are both made of fireproof material. A spring 209 is fixedly connected between the shell 1 and the rotating wheel 208. The spring 209 is initially in a stored force state. After the baffle part of the piston frame 206 moves to lose contact with the adjacent connecting plate 207, the spring 209 releases its stored force, and the spring 209 drives the adjacent rotating wheel 208 to rotate, and the rotating wheel 208 drives the connecting plate 207 to move upward through the connecting rope.

[0042] like Figure 3 and Figure 4 As shown, it also includes: flexible blocks 3, which have four parts and are respectively arranged in the inner wall of the four corners of the shell 1. The flexible blocks 3 are made of fireproof material and are L-shaped. The flexible blocks 3 are located between two adjacent basalt fiber boards 201. The flexible blocks 3 are fixed with sliding plates 301 near the two adjacent basalt fiber boards 201. After the phase change heat storage agent in the first chamber 202 is heated and phase-changed, the volume of the phase change heat storage agent increases and squeezes the sliding plate 301. The sliding plate 301 squeezes the flexible blocks 3, so that the flexible blocks 3 are shaped The volume of the phase change heat storage agent is increased by adapting to the deformation of the flexible block 3. The sliding plate 301 is fitted with the adjacent basalt fiber plate 201. The sliding plate 301 is used to squeeze the adjacent elastic telescopic sealing plate 204. Taking the elastic telescopic sealing plate 204 on the left as an example, the front and rear sides of the left elastic telescopic sealing plate 204 can be respectively extended and retracted in the forward and backward directions. During the movement of the sliding plate 301, the front and rear sides of the elastic telescopic sealing plate 204 are always respectively close to the two adjacent sliding plates 301.

[0043] Specific working principle:

[0044] When the operator needs to use this device to protect the battery, the operator opens the sealing cover 101 and places the battery in the outer shell 1, and then closes the sealing cover 101. When the outer shell 1 is subjected to external impact (for example, when the car starter battery is in use, the car is rear-ended and the outer shell 1 is impacted, or the battery is hit by a heavy object during charging), the basalt fiber board 201 supports the outer shell 1 through the second support part 5, thereby increasing the hardness of the outer shell 1 and reducing the probability of damage to the outer shell 1, thereby enhancing the safety of the battery.

[0045] During the use of the battery, if the battery is overloaded or overheated, the phase change heat storage agent in the first chamber 202 continuously absorbs the heat generated by the battery to reduce the temperature of the battery during use. The phase change heat storage agent absorbs heat and gradually changes phase (for example, solid paraffin changes into liquid paraffin), and the volume of the phase change heat storage agent gradually increases. The phase change heat storage agent squeezes the elastic telescopic sealing plate 204 and the sliding plate 301, and the sliding plate 301 squeezes the flexible block 3, causing the flexible block 3 to deform (during the deformation of the flexible block 3, the two sides of the elastic telescopic sealing plate 204 are always close to the adjacent sliding plates 301). The deformation of the flexible block 3 adapts to the increase in the volume of the phase change heat storage agent, and the elastic telescopic sealing plate 204 is pressed downward. The elastic telescopic sealing plate 204 squeezes its first elastic member. When the battery temperature returns to normal, the first elastic member of the elastic telescopic sealing plate 204 rebounds and drives it to reset. The flexible block 3 rebounds and no longer deforms, and the sliding plate 301 resets.

[0046] When the battery explodes due to thermal runaway, the battery explodes and impacts the outer shell 1, and the inner layer of the outer shell 1 is deformed, causing the space in the first chamber 202 to become smaller. At this time, the battery explosion squeezes the first support part 4, and the first support part 4 moves and squeezes the connection part of the basalt fiber board 201, causing the basalt fiber board 201 to be gradually flattened. Taking the left basalt fiber board 201 as an example, the front-to-back length of the left basalt fiber board 201 increases after being compressed, and the space in the second chamber 203 is also compressed. The basalt fiber board 201 flattens and squeezes the two adjacent sliding plates 3 01, the sliding plate 301 squeezes the flexible block 3, and all the basalt fiber boards 201 wrapped around the battery expand, so that the volume inside the shell 1 increases. Before the battery explodes, the amount of gas that can be stored in the shell 1 increases, so as to reduce the probability of leakage of high-temperature and high-pressure gas before the battery explodes. When the battery explodes, the deformation of the basalt fiber board 201 cushions the explosion of the battery, thereby slowing down the speed at which the gas and battery debris in the shell 1 spread to the surroundings, thereby reducing the range of debris splashing around after the battery explodes and reducing the probability of people being injured by debris.

[0047] When the temperature of the battery rises to a level where there is a risk of explosion, the elastically retractable sealing plate 204 is squeezed downward by the phase-change heat storage agent. The elastically retractable sealing plate 204 squeezes the gas in the lower part of the second chamber 203 into the connecting hole 2051. The gas squeezes the piston rack 206 to move, and the piston rack 206 moves until it loses contact with the connecting plate 207. The spring 209 releases its stored force, and the spring 209 drives the adjacent rotating wheel 208 to rotate. The rotating wheel 208 drives the connecting plate 207 upward through the connecting rope, and the connecting plate 207 drives its net bag upward to wrap the battery with the net bags around it. When the battery explosion causes the outer shell 1 and the basalt fiber board 201 to rupture, the net bag of the connecting plate 207 intercepts the exploded battery fragments, and the net bag of the connecting plate 207 does not block the discharge of high-pressure gas. While relieving the pressure inside the outer shell 1, it reduces the probability of personal injury caused by splashing of battery fragments, thereby improving the safety of the battery during use.

[0048] When the battery protective shell or battery is damaged, the operator collects and replaces the damaged battery protective shell or battery.

[0049] like Figure 4 、 Figure 6 and Figure 9 As shown, the piston rack 206 is provided with exhaust holes 601, and the bottom of the shell 1 is provided with gradient holes 602 with the same number as the exhaust holes 601. The gradient holes 602 are triangular. After the piston rack 206 moves, the exhaust holes 601 are used to connect the adjacent gradient holes 602 with the interior of the shell 1. The width of the gradient holes 602 gradually increases from close to the adjacent exhaust holes 601 to far away from them, so that when the exhaust holes 601 move toward the adjacent gradient holes 602, the exhaust area between the exhaust holes 601 and the adjacent gradient holes 602 gradually increases.

[0050] like Figure 1 and Figure 9 As shown, a recessed portion 701 is provided at the bottom of the shell 1, and the gradient hole 602 is located on the recessed portion 701. A plurality of circumferentially distributed exhaust portions 702 are provided at the bottom of the shell 1. The exhaust portions 702 are arranged at the bottom of the shell 1 so that the high-pressure gas in the shell 1 is actively discharged downward to the exhaust portions 702. When the battery explosion causes the gas in the shell 1 to be delayed in discharge, the gas preferentially squeezes the exhaust portions 702 downward, causing the exhaust portions 702 to bulge downward, thereby reducing the probability of debris generated by the battery explosion being splashed upward.

[0051] Specific working principle:

[0052] When the battery temperature rises and the piston rack 206 moves, the piston rack 206 drives the exhaust hole 601 to move, so that the exhaust hole 601 is connected with the adjacent gradient hole 602. Taking the exhaust hole 601 on the left as an example, the higher the battery temperature, the more the exhaust hole 601 moves to the right, and the larger the exhaust area between the exhaust hole 601 and the adjacent gradient hole 602. The high-temperature and high-pressure gas generated by the battery heating is discharged through the exhaust hole 601 and the gradient hole 602, and the gas discharge amount is adaptively adjusted according to the battery temperature. The discharged gas is then discharged to the exhaust portion 702 through the recessed portion 701 at the bottom of the outer shell 1. When the gas pressure in the outer shell 1 is too high or the battery explodes, the gas is discharged through the lower side and squeezes the recessed portion 701 to bulge downward, so as to reduce the probability of debris splashing from the upper side of the outer shell 1 after the battery explodes, thereby improving the safety of the battery during use.

[0053] like Figure 4 and Figure 10 As shown, it also includes: support bars 8, the number of which is the same as the number of the second support parts 5, all of which are fixed to the shell 1, and are used to increase the support thickness of the second support part 5. The support bars 8 are elastic and the support bars 8 are corrugated. Taking the support bar 8 on the left side as an example, the bending parts of the left support bar 8 are both located on its front and rear sides, so that the support bar 8 can only bend and deform in the direction of the two adjacent connection parts on the basalt fiber board 201. When the second support part 5 is subjected to external impact force, the support bar 8 is difficult to bend and deform. When the first support part 4 is deformed by the impact force generated by the battery explosion, the first support part 4 squeezes the support bar 8 to bend. The elastic coefficients of all support bars 8 on the same basalt fiber board 201 increase successively from the support bar 8 in the middle to the support bars 8 on both sides.

[0054] Specific working principle:

[0055] When the shell 1 is subjected to external impact, the second support portion 5 is subjected to force, and the support bar 8 supports the second support portion 5 to improve the strength of the second support portion 5. When the shell 1 is subjected to the explosion impact of the internal battery, the first support portion 4 is squeezed by the inner layer of the shell 1. The first support portion 4 squeezes the connection part of the basalt fiber board 201, so that the basalt fiber board 201 is gradually flattened. Taking the left basalt fiber board 201 as an example, the front and rear length of the left basalt fiber board 201 increases after being compressed (the basalt fiber board 201 gradually squeezes the adjacent sliding plate 301 during the deformation process). , causing the flexible block 3 to deform, and the two sides of the elastically retractable sealing plate 204 can respectively retract in the direction of the two adjacent flexible blocks 3, so that the elastically retractable sealing plate 204 is always in close contact with the two adjacent sliding plates 301), the second supporting portion 5 moves and drives the supporting bar 8 to deform, increasing the internal volume of the shell 1, thereby increasing the amount of gas that can be stored in the shell 1. Before the battery explodes, the speed at which the gas and battery debris in the shell 1 diffuse to the surroundings is slowed down, so as to reduce the range of the debris splashing to the surroundings after the battery explodes, thereby reducing the probability of accidental injury to personnel caused by the battery explosion.

[0056] When the battery protective shell or battery is damaged, the operator collects and replaces the damaged battery protective shell or battery.

[0057] The above are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A composite multifunctional battery protective shell based on basalt fiber, characterized in that: Includes: A housing (1), wherein the housing (1) is sealed with a sealing cover (101); The protective component (2) has four groups, which are respectively arranged at the four edges of the outer shell (1) in the circumferential direction, and are used to protect the batteries stored in the outer shell (1). The protective component (2) includes: a basalt fiber board (201) slidably connected to the adjacent inner walls of the outer shell (1), the basalt fiber board (201) divides the adjacent inner walls of the outer shell (1) into a first chamber (202) and a second chamber (203), the second chamber (203) is in a vacuum state, an elastic telescopic sealing plate (204) is sealingly and slidably connected in the first chamber (202), a first elastic member is fixed between the elastic telescopic sealing plate (204) and the outer shell (1), the space in the first chamber (202) located above the elastic telescopic sealing plate (204) is filled with a phase change heat storage agent, and a protective component is provided in the outer shell (1), and the protective component is used to provide emergency protection for the battery.

2. The composite multifunctional battery protective shell based on basalt fiber according to claim 1, characterized in that: The basalt fiber board (201) is composed of a plurality of first supporting portions (4), a plurality of second supporting portions (5), and a plurality of inclined connecting portions; the first supporting portions (4) and the second supporting portions (5) are staggered; the first supporting portion (4) is closer to the interior of the shell (1) than the adjacent second supporting portion (5); the connecting portion of the basalt fiber board (201) is used to connect adjacent first supporting portions (4) and adjacent second supporting portions (5); the thickness of the second supporting portion (5) is greater than the thickness of the first supporting portion (4).

3. The composite multifunctional battery protective shell based on basalt fiber according to claim 2, characterized in that: The protection component includes: A support seat (205) is fixedly connected to the bottom of the housing (1), and the support seat (205) is provided with four circumferentially distributed communication holes (2051), and the communication holes (2051) are in communication with the adjacent first chamber (202); The piston rack (206) has four parts, each of which is slidably connected to the adjacent communicating holes (2051). A second elastic member is fixedly connected between the piston rack (206) and the support seat (205). The support seat (205) is slidably connected to four circumferentially distributed connecting plates (207). A net bag is fixedly connected between the connecting plates (207) and the support seat (205). The piston rack (206) is used to limit the adjacent connecting plates (207). The rotating wheels (208) have at least four circumferentially distributed wheels, which are rotatably connected to the four circumferential edges of the housing (1). A connecting rope is fixed between the rotating wheel (208) and the adjacent connecting plate (207). The net bag and the connecting rope of the connecting plate (207) are both made of fireproof material. A spring (209) is fixed between the housing (1) and the rotating wheel (208).

4. The composite multifunctional battery protective case based on basalt fiber according to claim 3, characterized in that: Also included are: There are four flexible blocks (3) which are respectively arranged in the inner walls at the four corners of the shell (1). The flexible blocks (3) are located between two adjacent basalt fiber boards (201). The flexible blocks (3) are fixed with sliding plates (301) near the two adjacent basalt fiber boards (201). The sliding plates (301) are fitted with the adjacent basalt fiber boards (201). The sliding plates (301) are used to squeeze the adjacent elastic telescopic sealing plates (204).

5. The composite multifunctional battery protective case based on basalt fiber according to claim 4, characterized in that: The piston frame (206) is provided with an exhaust hole (601), and the bottom of the shell (1) is provided with four gradient holes (602). The exhaust holes (601) are used to connect adjacent gradient holes (602) with the interior of the shell (1).

6. The composite multifunctional battery protective case based on basalt fiber according to claim 5, characterized in that: The bottom of the housing (1) is provided with a recessed portion (701), the gradient hole (602) is located on the recessed portion (701), and the bottom of the housing (1) is provided with a plurality of circumferentially distributed exhaust portions (702).

7. The basalt fiber-based composite multifunctional battery protective shell according to claim 6, characterized in that: The width of the gradual hole (602) gradually increases from a position close to the adjacent exhaust hole (601) to a position far away from it.

8. The basalt fiber-based composite multifunctional battery protective shell according to claim 2, characterized in that: Also included are: The number of support bars (8) is the same as the number of the second support parts (5), and both are fixed to the housing (1). The support bars (8) are fitted with adjacent second support parts (5) to increase the support thickness of the second support parts (5).

9. The composite multifunctional battery protective case based on basalt fiber according to claim 8, characterized in that: The support bar (8) is elastic and wave-shaped, and the support bar (8) can only be bent and deformed in the direction where two adjacent first support portions (4) are located.

10. The basalt fiber-based composite multifunctional battery protective shell according to claim 9, characterized in that: The elastic coefficients of all the support bars (8) on the same basalt fiber board (201) increase in sequence from the support bar (8) in the middle to the support bars (8) on both sides.

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