Electric vehicle power battery with protection mechanism

Abstract

The invention discloses an electric vehicle power battery with a protection mechanism, and relates to the technical field of electric vehicle power batteries. The electric automobile power battery comprises a main protection framework, an automobile battery body is mounted in the main protection framework, a battery supporting plate is fixedly connected to the lower end of the main protection framework, a plurality of heavy-load springs are connected to the lower end of the battery supporting plate, a bottom plate is connected to the lower ends of the heavy-load springs, and a plurality of connecting plates are fixedly connected to the periphery of the bottom plate; a carbon dioxide jet flow component is arranged at the upper end of the main protection framework, a dry powder jet flow tank is arranged on the lower portion of the main protection framework, the carbon dioxide jet flow component and the dry powder jet flow tank are connected with a movable pushing component, and an automatic expansion component is arranged between the movable pushing component and the connecting plate. When collision occurs, the automatic expansion part expands to push the movable pushing part to move, so that the carbon dioxide jet flow part and the dry powder jet flow tank work, and fire extinguishing and cooling are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle power batteries, in particular to an electric vehicle power battery with a protection mechanism. Background Art

[0002] Power batteries are the core components of new energy vehicles and an important direction for future energy transformation. They are mainly different from the starting batteries used to start automobile engines. They are mostly valve-sealed lead-acid batteries, open-type tubular lead-acid batteries and lithium iron phosphate batteries. During transportation, electric vehicle power batteries will be protected and fixed with protective mechanisms to prevent them from being subjected to excessive impact.

[0003] In the existing technology, although electric vehicle power batteries are protected by protective mechanisms, the protective mechanisms of electric vehicle power batteries can still be damaged after being hit. In addition, after being hit, the metal shell of the electric vehicle power battery may be damaged, the internal electrolyte may flow out, and frictional electricity and fire may occur. Therefore, it does not meet the existing needs. In this regard, we propose an electric vehicle power battery with a protective mechanism. Summary of the invention

[0004] The purpose of the present invention is to provide an electric vehicle power battery with a protection mechanism to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides an electric vehicle power battery with a protection mechanism, comprising a main protection structure and an automobile battery body, wherein a battery support plate is fixedly connected to the lower end of the main protection structure, the automobile battery body is arranged on the battery support plate and is located in the main protection structure, a bottom plate is arranged below the battery support plate, a plurality of heavy-load springs are arranged between the bottom plate and the battery support plate, a plurality of connecting plates are fixedly connected around the bottom plate, and the connecting plates surround the main protection structure;

[0006] An automatic expansion component is fixedly connected to the inner side of the upper end of the connecting plate, a carbon dioxide spray component is fixedly connected to the upper end of the main protective structure, a dry powder spray can is arranged at the lower end of the main protective structure, and the dry powder spray can is fixed on the bottom plate. A movable pushing component is also arranged between the automatic expansion component and the main protective structure, the upper end of the movable pushing component is movably connected to the carbon dioxide spray component, and the lower end of the movable pushing component is movably connected to the dry powder spray can, one end of the dry powder spray can is provided with a nozzle, and a latch plug is plugged in the nozzle; the automatic expansion component can expand when the connecting plate collides, and after the automatic expansion component expands, it can drive the movable pushing component to act on the carbon dioxide spray component and the dry powder spray can, so that the carbon dioxide spray component and the dry powder spray can work to cool down the vehicle battery body and extinguish the fire.

[0007] Preferably, the main protective structure includes a plurality of support frames, the support frames are arranged in one-to-one correspondence with the connecting plates, the support frames are penetrated by inner slots, and the inner slots are inserted with buffer plates.

[0008] Preferably, the movable pushing component includes a movable plate movably arranged at the front end of the support frame, and the upper end of the movable plate is fixedly connected with a first push column, the first push column is arranged in a one-to-one correspondence with the carbon dioxide jet component, and the first push column enters the carbon dioxide jet component.

[0009] Preferably, the carbon dioxide spray component includes a tank shell fixedly connected to the support frame, the interior of the tank shell is fixedly connected to an inner support plate along the long axis, the interior of the tank shell is radially provided with a baffle, the upper end of the baffle is connected to the upper end of the tank shell by a hinge, one end of the baffle is connected to a curved spring, one end of the curved spring is connected to the upper end surface of the tank shell, a storage box is placed on the upper end of the inner support plate, the first push column and the baffle respectively resist the two ends of the storage box; after the automatic expansion component expands, it drives the first push column to move in a direction close to the baffle, and the baffle is squeezed to approach the upper end surface of the tank shell, so that the storage box falls from the inner support plate, and the storage box is provided with a hole.

[0010] Preferably, the bottom of the tank shell is loaded with a strong acid solution, the liquid level of the strong acid solution does not exceed the inner support plate, and the storage box is loaded with sodium bicarbonate powder; after the storage box falls from the inner support plate, the sodium bicarbonate powder inside the storage box reacts with the strong acid solution to generate carbon dioxide gas; the tank shell is also provided with a pressure relief valve.

[0011] Preferably, a pushing assembly is fixedly connected to the lower end of the movable plate, and the pushing assembly is arranged in a one-to-one correspondence with the dry powder spray can. Each of the pushing assemblies includes a transverse plate and at least two second push columns, and at least two second push columns are arranged on the outside of the dry powder spray can. The front end of each second push column is fixedly connected to the movable plate, and the rear end is fixedly connected to the transverse plate, and the transverse plate is fixedly connected to the latch plug; after the automatic expansion component expands, it drives the second push column to move in a direction close to the transverse plate, so that the transverse plate drives the latch plug to fall off, so that the dry powder spray can works.

[0012] Preferably, a support block is mounted on the surface of the second push column, and the lower end of the support block is fixedly connected to the bottom plate.

[0013] Preferably, the dry powder spray tank is filled with dry powder fire extinguishing agent.

[0014] Preferably, the automatic expansion component comprises a deformable shell and a partition, wherein the partition is arranged in the deformable shell and divides the deformable shell into a first inner cavity and a second inner cavity, and the first inner cavity is located above the second inner cavity.

[0015] Preferably, the deformable shell is located between the connecting plate and the movable plate, and the two ends of the partition abut against the inner wall of the deformable shell while squeezing the outer wall of the deformable shell to contact the surface of the movable plate and the connecting plate. The deformable shell is made of an elastic soft rubber material, and the partition is made of a fragile material. The first inner cavity is loaded with sodium bicarbonate powder, and the second inner cavity is loaded with a strong acid solution. When the connecting plate collides, the connecting plate and the movable plate approach each other, causing the partition to break, and the sodium bicarbonate powder in the first inner cavity enters the second inner cavity and reacts with the strong acid solution in the second inner cavity.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. When the battery is hit, the automatic expansion component expands and squeezes the movable pushing component. The movable pushing component acts on the carbon dioxide spray component and the dry powder spray can, so that the carbon dioxide spray component sprays carbon dioxide and the dry powder spray can sprays dry powder fire extinguishing agent, thereby achieving the effect of cooling and extinguishing the car battery.

[0018] 2. When the connecting plate and the automatic expansion component are collided, the movable pushing component operates to make the first push column and the second push column run simultaneously, thereby making the carbon dioxide spray component at the upper end and the dry powder spray can at the lower end run simultaneously, thereby making the carbon dioxide spray component and the dry powder spray can simultaneously prevent fire and cool down the upper and lower ends of the vehicle battery body, wherein the carbon dioxide spray component uses carbon dioxide to prevent fire, and the dry powder spray can uses dry powder to prevent fire, and the combined use of the two makes the cooling effect more obvious.

[0019] 3. After the automatic expansion component expands, it pushes the first push column of the movable plate to the rear end. The first push column squeezes the storage box to force the storage box to move backward. During the backward movement of the storage box, the baffle is squeezed. The baffle overcomes the elastic force of the curved spring and approaches the upper end surface of the tank shell. Since there is a large gap between the inner support plate and the inner wall of the tank shell, the storage box moves a distance and then breaks away from the inner support plate and falls into the lower part of the tank shell. There are a large number of tiny holes distributed on the surface of the entire storage box. These tiny holes can prevent the sodium bicarbonate powder from escaping. When the storage box falls from the inner support plate to the lower part of the tank shell, the strong acid solution in the lower part of the tank shell will enter the storage box from the tiny holes on the surface of the storage box. At this time, the strong acid solution and the sodium bicarbonate powder are mixed to produce a large amount of carbon dioxide, and finally the carbon dioxide is leaked from the pressure relief valve on the outer surface of the carbon dioxide jet component. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In addition, similar numbers in the figures are used to represent similar components, among which:

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0022] Figure 2 It is a three-dimensional structural schematic diagram of the overall interior and movable driving components of the present invention;

[0023] Figure 3 A top view of the present invention as a whole;

[0024] Figure 4 It is a cross-sectional view of the movable propulsion component, the carbon dioxide spray component and the dry powder spray can in the present invention;

[0025] Figure 5 It is a cross-sectional view of the movable propulsion component, the carbon dioxide spray component and the dry powder spray can in another state of the present invention;

[0026] Figure 6 It is a three-dimensional structural diagram of the main protection structure in the present invention.

[0027] In the figure: 1. connecting plate; 2. movable pushing component; 201. movable plate; 202. first push column; 203. second push column; 204. support block; 205. transverse plate; 3. carbon dioxide spray component; 301. tank shell; 302. inner support plate; 303. storage box; 304. baffle; 305. curved spring; 4. automatic expansion component; 401. first inner cavity; 402. partition; 403. second inner cavity; 5. main protective structure; 501. support frame; 502. inner slot; 503. buffer plate; 6. automobile battery body; 7. dry powder spray can; 8. latch plug; 9. battery support plate; 10. heavy-duty spring; 11. pressure relief valve; 12. bottom plate; 13. nozzle. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invention workpiece is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] See also Figures 1 to 6 An embodiment of the present invention provides an electric vehicle power battery with a protective mechanism, including a main protective structure 5 and a vehicle battery body 6. The lower end of the main protective structure 5 is fixedly connected to a battery support plate 9. The vehicle battery body 6 is arranged on the battery support plate 9 and is located in the main protective structure 5. A bottom plate 12 is provided below the battery support plate 9. A plurality of heavy-load springs 10 are provided between the bottom plate 12 and the battery support plate 9. A plurality of connecting plates 1 are fixedly connected around the bottom plate 12, and the connecting plates 1 surround the main protective structure 5. An automatic expansion component 4 is fixedly connected to the inner side of the upper end of the connecting plate 1, a carbon dioxide spray component 3 is fixedly connected to the upper end of the main protection frame 5, a dry powder spray can 7 is arranged at the lower end of the main protection frame 5, and the dry powder spray can 7 is fixed on the bottom plate 12. A movable pushing component 2 is also arranged between the automatic expansion component 4 and the main protection frame 5, the upper end of the movable pushing component 2 is movably connected to the carbon dioxide spray component 3, and the lower end of the movable pushing component 2 is movably connected to the dry powder spray can 7, and one end of the dry powder spray can 7 is provided with a nozzle 13, and a latch plug 8 is plugged in the nozzle 13. The automatic expansion component 4 can expand when the connecting plate 1 collides, and after the automatic expansion component 4 expands, it can drive the movable pushing component 2 to act on the carbon dioxide spray component 3 and the dry powder spray can 7, so that the carbon dioxide spray component 3 and the dry powder spray can 7 work to cool down the automobile battery body 6 and extinguish the fire.

[0036] Among them, a plurality of heavy-load springs 10 are supported between the battery support plate 9 and the bottom plate 12. This arrangement enables a supporting connection between the battery support plate 9 and the bottom plate 12, and at the same time supports a plurality of vehicle battery bodies 6 on the upper end of the main protection structure 5. In the event of a collision, the plurality of heavy-load springs 10 play a buffering role for the vehicle battery body 6.

[0037] The main protective structure 5 includes a plurality of support frames 501, and an inner slot 502 is provided inside the support frame 501, and a buffer plate 503 is inserted inside the inner slot 502. The support frames 501 are arranged in a one-to-one correspondence with the connecting plates 1. Preferably, the number of the support frames 501 and the connecting plates 1 are 4. The function of the four support frames 501 is to limit and fix the multiple automobile battery bodies 6, so as to form protection for the multiple automobile battery bodies 6. Furthermore, by providing the inner slot 502 inside the support frame 501, and inserting the buffer plate 503 in the inner slot 502, the buffer plate 503 is made of soft material, when the overall main protective structure 5 is hit, the buffer plate 503 can absorb part of the impact force, thereby further improving the protective effect of the overall main protective structure 5.

[0038] The above-mentioned movable pushing component 2 includes a movable plate 201 arranged at the front end of the support frame 501, and a first push column 202 is fixedly connected to the rear side of the upper end of the movable plate 201. The first push column 202 is arranged in a one-to-one correspondence with the carbon dioxide spray component 3, and the first push column 202 is inserted into the corresponding tank shell 301. A pushing assembly is fixedly connected to the rear side of the lower end of the movable plate 201. The pushing assembly is arranged in a one-to-one correspondence with the dry powder spray can 7. Each pushing assembly includes a transverse plate 205 and at least two second push columns 203. At least two second push columns 203 are arranged on the outside of the dry powder spray can 7. The front end of each second push column 203 is fixedly connected to the movable plate 201 and the rear end is fixedly connected to the transverse plate 205. The transverse plate 205 is fixedly connected to the latch plug 8. After the automatic expansion component 4 expands, it drives the second push column 203 to move in the direction close to the transverse plate 205. Under the driving action of the transverse plate 205, the latch plug 8 falls off, and the dry powder spray can 7 sprays dry powder fire extinguishing agent. Furthermore, a support block 204 is mounted on the surface of the second push column 203, the lower end of the support block 204 is fixedly connected to the bottom plate 12, and a movable hole is provided through the front and rear of the support block 204, and the second push column 203 is inserted into the movable hole to increase the stability of the lateral movement of the second push column 203.

[0039] The carbon dioxide jetting component 3 includes a tank shell 301 fixedly connected to the upper end of the support frame 501, a baffle 304 is provided in the middle of the tank shell 301, the upper end of the baffle 304 is connected to the upper end of the tank shell 301 through a hinge, one end of the baffle 304 is connected to a curved spring 305, and one end of the curved spring 305 is connected to the upper end surface of the tank shell 301. An inner support plate 302 is fixedly connected to the inside of the tank shell 301, the inner support plate 302 is arranged along the length direction of the tank shell 301, and extends from one side of the tank shell 301 to the position of the baffle 304, a storage box 303 is placed on the upper end of the inner support plate 302, the distance between the inner support plate 302 and the other side of the tank shell 301 is greater than the length of the storage box 303, and the storage box 303 can fall from the inner support plate 302 to the lower part of the tank shell 301.

[0040] The bottom of the tank shell 301 is loaded with a strong acid solution, the liquid level of the strong acid solution does not exceed the inner support plate 302, and the storage box 303 is loaded with sodium bicarbonate powder. After the storage box 303 falls from the inner support plate 302, the strong acid solution can enter the storage box 303, so that the sodium bicarbonate powder in the storage box 303 reacts with the strong acid solution to generate carbon dioxide gas; the tank shell 301 is also provided with a pressure relief valve 11, and the carbon dioxide gas can be ejected from the pressure relief valve 11.

[0041] In a specific implementation, holes can be provided on the top of the storage box 303. When the storage box 303 is placed on the inner support plate 302, the holes on the top of the storage box 303 are away from the strong acid solution, so as to prevent the strong acid solution at the bottom of the tank shell 301 from entering the storage box 303 as the vehicle shakes. When the storage box 303 falls, the strong acid solution can enter the storage box 303 through these holes.

[0042] When the overall movable pushing component 2 is not active, the overall baffle 304 is located at the upper end of the inner support plate 302, wherein the baffle 304 moves toward one side of the storage box 303 under the action of the elastic force of the curved spring 305, thereby preventing the storage box 303 from falling into the strong acid solution below the inner part of the tank shell 301 due to the shaking of the vehicle without the push of the first push column 202.

[0043] The automatic expansion component 4 includes a deformable shell and a partition 402. The partition 402 is arranged in the deformable shell and divides the deformable shell into a first inner cavity 401 and a second inner cavity 403. The first inner cavity 401 is located above the second inner cavity 403. In a possible implementation, the deformable shell is located between the connecting plate 1 and the movable plate 201. The two ends of the partition 402 abut against the inner wall of the deformable shell, and the outer wall of the deformable shell is squeezed to contact the surface of the movable plate 201 and the connecting plate 1. The deformable shell is made of an elastic soft rubber material, such as PVC (Polyvinyl chloride). The partition 402 is made of a fragile material, such as PS (Polystyrene). At the same time, in order to ensure that the partition 402 can be broken after being stressed, the partition 402 is designed to have a smaller wall thickness. The first inner cavity 401 is loaded with sodium bicarbonate powder, and the second inner cavity 403 is loaded with a strong acid solution. When the connecting plate 1 collides, the connecting plate 1 and the movable plate 201 come close to each other, causing the partition 402 to break, and the sodium bicarbonate powder in the first inner cavity 401 enters the second inner cavity 403 to react with the strong acid solution in the second inner cavity 403 .

[0044] See also Figure 4 and Figure 5 , the partition 402 is broken when the connecting plate 1 and the automatic expansion component 4 collide, and the sodium bicarbonate powder inside the upper end of the first inner cavity 401 enters the second inner cavity 403, and the sodium bicarbonate powder reacts with the strong acid solution contained in the second inner cavity 403 to produce a large amount of carbon dioxide. It is worth noting that even if the automatic expansion component 4 is damaged after the collision, the carbon dioxide produced by the chemical reaction still exists, thereby making the entire automatic expansion component 4 also have the performance of fire prevention and fire extinguishing.

[0045] After the automatic expansion component 4 expands, the movable plate 201 pushes the first push column 202 to the rear end, and the first push column 202 squeezes the storage box 303, forcing the storage box 303 to move backward. In the process of the storage box 303 moving backward, the storage box 303 squeezes the baffle 304, and the baffle 304 overcomes the elastic force of the curved spring 305 and approaches the upper end surface of the tank shell 301. Since there is a large gap between the inner support plate 302 and the inner wall of the tank shell 301, the storage box 303 moves a certain distance and then breaks away from the inner support plate 302 and falls into the lower part of the tank shell 301. There are a large number of holes distributed on the upper part or top of the storage box 303. When the storage box 303 is placed on the inner support plate 302, the sodium bicarbonate powder will not escape from these holes. When the storage box 303 falls from the inner support plate 302 to the lower part of the tank shell 301, the strong acid solution in the lower part of the tank shell 301 will enter the storage box 303 through the holes of the storage box 303. The strong acid solution and the sodium bicarbonate powder are mixed to produce a large amount of carbon dioxide, and finally the carbon dioxide is leaked from the pressure relief valve 11 on the outer surface of the carbon dioxide spray component 3.

[0046] In this embodiment, when the connecting plate 1 and the automatic expansion component 4 are collided, the movable pushing component 2 operates to make the first push column 202 and the second push column 203 operate simultaneously, thereby driving the carbon dioxide spray component 3 at the upper end and the dry powder spray can 7 at the lower end to operate simultaneously. The carbon dioxide spray component 3 sprays carbon dioxide, and the dry powder spray can 7 sprays dry powder spray. The two simultaneously extinguish the fire and cool down the upper and lower ends of the automobile battery body 6. The mixed use of the two is conducive to improving the fire extinguishing and cooling effect.

[0047] The working process of the electric vehicle power battery with the protection mechanism includes:

[0048] When the battery is not subjected to strong external impact, the overall frame of the battery is intact, the automatic expansion component 4 is in a "dormant" state, the carbon dioxide spray component 3 does not produce carbon dioxide, and the dry powder spray tank 7 does not spray dry powder fire extinguishing agent.

[0049] When the battery collides and causes the connecting plate 1 to be squeezed and deformed, the partition 402 inside the automatic expansion component 4 breaks, the first inner cavity 401 is connected to the second inner cavity 403, and the sodium bicarbonate powder inside the upper end of the first inner cavity 401 enters the second inner cavity 403 and reacts with the strong acid solution inside the second inner cavity 403 to produce a large amount of carbon dioxide.

[0050] As the carbon dioxide in the automatic expansion component 4 increases, the automatic expansion component 4 expands rapidly. Since the connecting plate 1 is in a fixed state and the movable plate 201 is in a movable state, the expanded automatic expansion component 4 pushes the movable plate 201 to move away from the connecting plate 1. Then, the movable plate 201 drives the first push column 202 and the second push column 203 to move.

[0051] The first push column 202 squeezes the storage box 303, forcing the storage box 303 to move backward. During the backward movement of the storage box 303, the baffle 304 is squeezed, and the baffle 304 overcomes the elastic force of the curved spring 305 and moves upward. Finally, the storage box 303 falls from the upper end of the inner support plate 302 to the strong acid solution at the lower end of the tank shell 301. At this time, the strong acid solution enters the storage box 303 and mixes with the sodium bicarbonate powder inside the storage box 303, generating a large amount of carbon dioxide gas in the tank shell 301. Finally, the carbon dioxide gas inside the tank shell 301 leaks out from the pressure relief valve 11 outside the carbon dioxide jet component 3, and fire prevention and fire extinguishing treatment is performed on the top of the vehicle battery body 6.

[0052] While the movable plate 201 pushes the first push column 202 to move horizontally, the movable plate 201 also pushes the second push column 203 at the lower end. The second push column 203 drives the horizontal plate 205 on one side to move toward the rear end. The latch plug 8 fixedly connected to one side of the horizontal plate 205 is disengaged from the nozzle 13, so that the dry powder fire extinguishing agent in the dry powder spray tank 7 is sprayed out from the nozzle 13 to prevent fire and cool the lower end of the automobile battery body 6.

[0053] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An electric vehicle power battery with a protection mechanism, comprising a main protection structure (5) and an automobile battery body (6), characterized in that: A battery support plate (9) is fixedly connected to the lower end of the main protection structure (5); the automobile battery body (6) is arranged on the battery support plate (9) and is located in the main protection structure (5); a bottom plate (12) is provided below the battery support plate (9); a plurality of heavy-load springs (10) are provided between the bottom plate (12) and the battery support plate (9); a plurality of connecting plates (1) are fixedly connected around the bottom plate (12); and the connecting plates (1) surround the main protection structure (5); An automatic expansion component (4) is fixedly connected to the inner side of the upper end of the connecting plate (1); a carbon dioxide spray component (3) is fixedly connected to the upper end of the main protective frame (5); a dry powder spray can (7) is provided at the lower end of the main protective frame (5); the dry powder spray can (7) is fixed on the bottom plate (12); a movable pushing component (2) is further provided between the automatic expansion component (4) and the main protective frame (5); the upper end of the movable pushing component (2) is movably connected to the carbon dioxide spray component (3); and the lower end of the movable pushing component (2) is movably connected to the carbon dioxide spray component (3). The automatic expansion component (4) is capable of expanding when the connecting plate (1) collides with the connecting plate (1), and after the automatic expansion component (4) expands, it can drive the movable pushing component (2) to act on the carbon dioxide spray component (3) and the dry powder spray can (7), so that the carbon dioxide spray component (3) and the dry powder spray can (7) work, so as to cool down the automobile battery body (6) and extinguish the fire.

2. The electric vehicle power battery with a protection mechanism according to claim 1, characterized in that: The main protection structure (5) comprises a plurality of support frames (501), wherein the support frames (501) are arranged in a one-to-one correspondence with the connection plates (1), and wherein an inner slot (502) is provided through the support frame (501), and a buffer plate (503) is inserted into the inner slot (502).

3. The electric vehicle power battery with a protection mechanism according to claim 2, characterized in that: The movable pushing component (2) comprises a movable plate (201) movably arranged at the front end of the support frame (501); a first push column (202) is fixedly connected to the upper end of the movable plate (201); the first push column (202) is arranged in a one-to-one correspondence with the carbon dioxide jet component (3); and the first push column (202) enters the carbon dioxide jet component (3).

4. The electric vehicle power battery with a protection mechanism according to claim 3, characterized in that: The carbon dioxide spray component (3) comprises a tank shell (301) fixedly connected to a support frame (501); an inner support plate (302) is fixedly connected to the inside of the tank shell (301) along the long axis; a baffle (304) is radially provided inside the tank shell (301); an upper end of the baffle (304) is connected to the upper end of the tank shell (301) via a hinge; one end of the baffle (304) is connected to a curved spring (305); one end of the curved spring (305) is connected to the upper end of the tank shell (301); The storage box (303) is placed on the upper end of the inner support plate (302), and the first push column (202) and the baffle plate (304) respectively abut against the two ends of the storage box (303); after the automatic expansion component (4) expands, it drives the first push column (202) to move towards the baffle plate (304), and the baffle plate (304) is squeezed and approaches the upper end surface of the tank shell (301), so that the storage box (303) falls off the inner support plate (302), and the storage box (303) is provided with a hole.

5. The electric vehicle power battery with a protection mechanism according to claim 4, characterized in that: The bottom of the tank shell (301) is loaded with a strong acid solution, the liquid level of the strong acid solution does not exceed the inner support plate (302), and the storage box (303) is loaded with sodium bicarbonate powder; after the storage box (303) falls from the inner support plate (302), the sodium bicarbonate powder inside the storage box (303) reacts with the strong acid solution to generate carbon dioxide gas; the tank shell (301) is also provided with a pressure relief valve (11).

6. The electric vehicle power battery with a protection mechanism according to claim 3, characterized in that: A pushing assembly is fixedly connected to the lower end of the movable plate (201), and the pushing assembly is arranged in a one-to-one correspondence with the dry powder spray can (7). Each of the pushing assemblies comprises a transverse plate (205) and at least two second push columns (203). The at least two second push columns (203) are arranged on the outer side of the dry powder spray can (7). The front end of each second push column (203) is fixedly connected to the movable plate (201), and the rear end is fixedly connected to the transverse plate (205). The transverse plate (205) and the latch plug (8) are fixedly connected. After the automatic expansion component (4) expands, it drives the second push column (203) to move in a direction close to the transverse plate (205), so that the transverse plate (205) drives the latch plug (8) to fall off, so that the dry powder spray can (7) works.

7. The electric vehicle power battery with a protection mechanism according to claim 6, characterized in that: A support block (204) is sleeved on the surface of the second push column (203), and the lower end of the support block (204) is fixedly connected to the bottom plate (12).

8. The electric vehicle power battery with a protection mechanism according to claim 6, characterized in that: The dry powder spray tank (7) contains dry powder fire extinguishing agent.

9. The electric vehicle power battery with a protection mechanism according to claim 3, characterized in that: The automatic expansion component (4) comprises a deformable shell and a partition (402); the partition (402) is arranged in the deformable shell and divides the deformable shell into a first inner cavity (401) and a second inner cavity (403); the first inner cavity (401) is located above the second inner cavity (403).

10. The electric vehicle power battery with a protection mechanism according to claim 9, characterized in that: The deformable shell is located between the connecting plate (1) and the movable plate (201); the two ends of the partition (402) abut against the inner wall of the deformable shell, while the outer wall of the deformable shell is squeezed to contact the surface of the movable plate (201) and the connecting plate (1); the deformable shell is made of an elastic soft rubber material; the partition (402) is made of a fragile material; the first inner cavity (401) is loaded with sodium bicarbonate powder, and the second inner cavity (403) is loaded with a strong acid solution; when the connecting plate (1) collides, the connecting plate (1) and the movable plate (201) are close to each other, causing the partition (402) to break, and the sodium bicarbonate powder in the first inner cavity (401) enters the second inner cavity (403) and reacts with the strong acid solution in the second inner cavity (403).

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