Explosion-proof lithium battery

Abstract

This invention relates to the field of lithium battery technology and discloses an explosion-proof lithium battery, including a casing assembly. A battery control panel is embedded in one outer wall of the casing assembly, and a heat dissipation assembly is fixedly mounted on the other outer wall of the casing assembly. A battery body is snapped into the inner cavity of the casing assembly. Connecting seats are fixedly mounted on the positive and negative terminals of the battery body. The power input terminal of the battery control panel is electrically connected to the connecting seats. Insulating oil compressed in the inner cavity of the compression bottle is transferred to a sealed bag, causing the sealed bag to expand towards the battery body. This reduces the space between the separator and the inner cavity of the casing, causing the insulating oil in the separator and the inner cavity of the casing to be squeezed into the inner cavity of the battery body by the expansion of the sealed bag. The insulating oil coats the positive and negative electrode cells inside the inner cavity of the battery body, achieving insulation between the positive and negative electrode cells and preventing the battery body from further releasing positive and negative ions, thus preventing the battery body from heating up, expanding, and burning.

Description

Technical Field

[0001] This invention relates to the field of lithium battery technology, specifically to an explosion-proof lithium battery. Background Technology

[0002] Lithium-ion batteries are a type of battery that uses lithium metal or lithium alloys as the negative electrode material and a non-aqueous electrolyte solution. They can be broadly classified into two categories: lithium metal batteries and lithium-ion batteries. Lithium-ion batteries do not contain metallic lithium and are rechargeable. Due to the highly reactive chemical properties of lithium metal, its processing, storage, and use require very strict environmental controls. With the development of science and technology, lithium-ion batteries have become the mainstream technology.

[0003] Currently, when lithium batteries spontaneously combust or explode, rescue and emergency response can generally only be carried out using external fire extinguishing tools. Existing lithium batteries do not have a structure to prevent spontaneous combustion or even explosion. Summary of the Invention

[0004] This invention provides an explosion-proof lithium battery that solves the problems mentioned in the background section.

[0005] The present invention provides the following technical solution: an explosion-proof lithium battery, including a shell assembly, a battery control panel is embedded in one outer wall of the shell assembly, a heat dissipation assembly is fixedly mounted on the other outer wall of the shell assembly, a battery body is snapped into the inner cavity of the shell assembly, and a connector is fixedly mounted on both the positive and negative terminals of the battery body, and the power input terminal of the battery control panel is electrically connected to the connector.

[0006] As a preferred embodiment of the present invention: the outer casing assembly includes a casing, and isolation chambers are fixedly installed on both sides of the inner wall of the casing near the battery control panel. Isolation plates are fixedly installed on both sides of the casing near the heat dissipation assembly. Both sets of battery bodies are located within the space formed by the two sets of isolation plates and the casing. Buffer sponges I are fixedly installed on both sides of the inner wall of the casing. A sealing bag is adhered to the inner wall of buffer sponge I. Buffer sponge II is fixedly installed on the inner wall of the casing near the heat dissipation assembly. A fixing plate is fixedly installed on the top of the isolation plates. A compression bottle is snapped between the two sets of isolation plates. Temperature sensors are provided on the side of both sets of isolation plates near the battery bodies.

[0007] As a preferred technical solution of the present invention: the fixing plate is located on the top of the battery body, and the battery body is abutted by buffer sponge one and buffer sponge two, and both buffer sponge one and buffer sponge two have flow grooves on the side near the battery body.

[0008] As a preferred embodiment of the present invention: the space formed by the isolation plate and the shell is filled with insulating oil, and the discharge end of the compression bottle is connected to the inner cavity of the two sets of sealing bags;

[0009] The compression bottle includes an electronic sealing valve for controlling the discharge of liquid from the compression bottle, and the electronic sealing valve is electrically connected to the battery control panel, which includes a backup power supply.

[0010] As a preferred technical solution of the present invention: the density of the insulating oil is greater than that of the electrolyte, and both sets of isolation chambers are connected to the space formed by the two sets of isolation plates and the shell through connecting pipes, and the connecting pipes are located at the bottom of the isolation chambers;

[0011] One-way valves are installed at the connection between the isolation chamber and the connecting pipe, and at the top of the isolation chamber.

[0012] As a preferred embodiment of the present invention: the heat dissipation assembly includes a connecting shell, a liquid pump is fixedly mounted on the bottom inner wall of the connecting shell, one end of a heat dissipation fin is fixedly mounted on the discharge end of the liquid pump, and a discharge pipe is fixedly mounted on the other end of the heat dissipation fin. The two input ends of the liquid pump are respectively connected to the cavity formed by the two sets of isolation plates and the shell, and the two sets of discharge pipes are respectively connected to the cavity formed by the two sets of isolation plates and the shell. A cooling fan is provided on the top of the liquid pump. A cover plate is fixedly mounted on the outer wall of the connecting shell away from the outer shell assembly. An air inlet is opened on the outer wall of the cover plate opposite to the cooling fan, and air outlets are opened on both sides of the outer wall of the cover plate.

[0013] A conductive plate is provided on the top of the battery body, and the battery body is composed of several battery cells, which are electrically connected through the conductive plate.

[0014] The outer wall of the conductive plate is respectively fitted with a limiting plate and a cutting plate, and the bottom of the limiting plate and the cutting plate are fixedly assembled with a base. The inner cavity of the cutting plate is connected to a conduit.

[0015] The cutting board is in a retracted state.

[0016] The present invention has the following beneficial effects:

[0017] 1. This explosion-proof lithium battery connects the discharge end of the compression bottle to the inner cavity of two sets of sealing bags. The compression bottle is controlled by the battery control panel, which transfers the insulating oil compressed in the inner cavity of the compression bottle to the sealing bags. The sealing bags are placed on the inner wall of the buffer sponge, causing the sealing bags to expand towards the battery body. This reduces the space between the separator and the inner cavity of the casing, and the insulating oil in the separator and the inner cavity of the casing is squeezed into the inner cavity of the battery body by the expansion of the sealing bags. The insulating oil covers the positive and negative electrode cells in the inner cavity of the battery body, and the positive and negative electrode cells are insulated by the insulating oil to prevent the battery body from releasing positive and negative ions and causing the battery body to expand and burn due to heat.

[0018] Meanwhile, the electrolyte overflowing from the battery body will be deposited below the insulating oil due to density. The liquid at the bottom is transferred to the inner cavity of the isolation chamber through a one-way valve and connecting pipe.

[0019] By separating the electrolyte into an isolation chamber, the electrolyte is separated from the battery body, reducing the possibility of battery body combustion. At the same time, the isolation chamber seals the electrolyte, preventing it from contacting air and solving the problem of electrolyte overflow leading to contact with oxygen and subsequent combustion.

[0020] 2. This explosion-proof lithium battery uses a liquid pump to transfer the insulating oil in the cavity formed by the two sets of separators and the shell to the heat dissipation fins, and then transfers it back to the cavity formed by the two sets of separators and the shell through the discharge pipe. The cooling fan runs, and the air adsorbed through the air inlet is discharged through the air outlet, so that the air dissipates heat from the heat dissipation fins.

[0021] 3. This explosion-proof lithium battery is connected to the inner cavity of the cutting plate through a conduit. When the cutting plate is in a contracted state, the sealing bag expands towards the side closer to the battery body, thereby reducing the space of the separator and the inner cavity of the shell. The insulating oil located in the inner cavity of the separator and the shell is squeezed into the inner cavity of the cutting plate by the expansion of the sealing bag through the conduit, so that the cutting plate changes from a contracted state to a telescopic state.

[0022] By limiting the conductive plate with a limiting plate, the cutting plate can cut the conductive plate through the limiting plate, thereby eliminating the electrical connection between several battery cells. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the main structure of the battery of the present invention;

[0025] Figure 3 This is a schematic diagram of the connector structure of the present invention;

[0026] Figure 4This is a schematic diagram of the outer shell assembly structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the cushioning sponge of the present invention;

[0028] Figure 6 This is a schematic diagram of the heat dissipation component structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the compression bottle structure of the present invention;

[0030] Figure 8 This is a schematic diagram of the sealing bag structure of the present invention;

[0031] Figure 9 This is a schematic diagram of the conductive plate of the present invention;

[0032] Figure 10 This is a schematic diagram of the cutting board of the present invention.

[0033] In the diagram: 1. Housing assembly; 2. Battery control panel; 3. Heat dissipation assembly; 4. Battery body; 5. Connector;

[0034] 101. Shell; 102. Isolation chamber; 103. Isolation plate; 104. Buffer sponge one; 105. Buffer sponge two; 106. Fixing plate; 107. Sealing bag; 108. Compression bottle body;

[0035] 301. Connecting shell; 302. Liquid pump; 303. Heat dissipation fin; 304. Discharge pipe; 305. Cooling fan; 306. Cover plate; 307. Air inlet; 308. Air outlet;

[0036] 41. Conductive plate; 42. Limiting plate; 43. Cutting plate; 44. Base; 45. Conduit. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figure 1 - Figure 10 An explosion-proof lithium battery includes a housing assembly 1, a battery control panel 2 embedded in one outer wall of the housing assembly 1, a heat dissipation assembly 3 fixedly mounted on the other outer wall of the housing assembly 1, a battery body 4 snapped into the inner cavity of the housing assembly 1, and a connector 5 fixedly mounted on both the positive and negative terminals of the battery body 4. The power input terminal of the battery control panel 2 is electrically connected to the connector 5.

[0039] In a preferred embodiment: the outer casing assembly 1 includes a casing 101, with isolation chambers 102 fixedly mounted on both sides of the inner wall of the casing 101 near the battery control panel 2, and isolation plates 103 fixedly mounted on both sides of the casing 101 near the heat dissipation assembly 3. The two battery bodies 4 are located in the space formed by the two isolation plates 103 and the casing 101. Buffer sponges 104 are fixedly mounted on both sides of the inner wall of the casing 101, and sealing bags 107 are adhered to the inner wall of the buffer sponges 104. Buffer sponges 105 are fixedly mounted on the inner wall of the casing 101 near the heat dissipation assembly 3. A fixing plate 106 is fixedly mounted on the top of the isolation plates 103. A compression bottle 108 is snapped between the two isolation plates 103. Temperature sensors are provided on the side of each isolation plate 103 near the battery body 4.

[0040] In the above structure, the battery body 4 is isolated by the isolation plate 103, so that the battery body 4 is located in an independent space inside the outer shell assembly 1, and the battery body 4 is fixed by the fixing plate 106 so that the battery body 4 will not shake.

[0041] Temperature sensors installed on one side of the battery body 4 near the two sets of isolation plates 103 enable the battery control panel 2 to detect the state of the battery body 4 via temperature sensors.

[0042] In a preferred embodiment: the fixing plate 106 is located on the top of the battery body 4, and the battery body 4 is abutted by the first buffer sponge 104 and the second buffer sponge 105. Both the first buffer sponge 104 and the second buffer sponge 105 have flow grooves on the side near the battery body 4.

[0043] In a preferred embodiment: the space formed by the isolation plate 103 and the housing 101 is filled with insulating oil, and the discharge end of the compression bottle 108 is connected to the inner cavity of the two sets of sealing bags 107.

[0044] The compression bottle 108 includes an electronic sealing valve for controlling the discharge of liquid from the compression bottle 108, and the electronic sealing valve is electrically connected to the battery control panel 2, which includes a backup power supply.

[0045] In the above structure, the battery body 4 is abutted by the first buffer sponge 104 and the second buffer sponge 105. When the battery body 4 shakes, the first buffer sponge 104 and the second buffer sponge 105 can dampen the vibration and prevent the battery body 4 from colliding with the outer shell assembly 1. The flow grooves opened on the side of the first buffer sponge 104 and the second buffer sponge 105 near the battery body 4 allow the insulating oil filled in the space between the isolation plate 103 and the shell 101 to circulate, thereby achieving the effect of cooling the battery body 4.

[0046] On the other hand, the battery control panel 2 detects the state of the battery body 4 through a temperature sensor. When the battery body 4 breaks, the value detected by the temperature sensor increases. It connects the discharge end of the compression bottle 108 with the inner cavity of the two sets of sealing bags 107. The battery control panel 2 controls the compression bottle 108 to transfer the insulating oil compressed in the inner cavity of the compression bottle 108 to the sealing bag 107. The sealing bag 107 is placed on the inner wall of the buffer sponge 104, causing the sealing bag 107 to expand towards the side closer to the battery body 4. This reduces the space of the separator plate 103 and the inner cavity of the shell 101, and the insulating oil in the inner cavity of the separator plate 103 and the shell 101 is squeezed into the inner cavity of the battery body 4 by the expansion of the sealing bag 107. The insulating oil covers the positive and negative electrode cells in the inner cavity of the battery body 4, so that the positive and negative electrode cells are insulated by the insulating oil, thereby preventing the battery body 4 from further releasing positive and negative ions and causing the battery body 4 to expand and burn due to heat.

[0047] The battery control panel 2 has a backup power supply, so that if the battery body 4 is damaged, the battery control panel 2 can be controlled by the backup power supply.

[0048] In a preferred embodiment: the density of the insulating oil is greater than that of the electrolyte, and both sets of isolation chambers 102 are connected to the space formed by the two sets of isolation plates 103 and the shell 101 through connecting pipes, and the connecting pipes are located at the bottom of the isolation chambers 102.

[0049] One-way valves are installed at the connection between the isolation chamber 102 and the connecting pipe, and at the top of the isolation chamber 102.

[0050] In the above structure, since the density of the insulating oil is greater than that of the electrolyte, when the battery body 4 is broken, the electrolyte inside the battery body 4 will be deposited below the insulating oil due to the density effect. The liquid at the bottom of the isolation chamber 102 is transferred to the inner cavity of the isolation chamber 102 through the one-way valve and the connecting pipe via the connecting pipe, while the air in the inner cavity of the isolation chamber 102 is discharged through the one-way valve at the top of the isolation chamber 102.

[0051] By separating the electrolyte into the isolation chamber 102, the electrolyte and the battery body 4 are separated, reducing the possibility of the battery body 4 burning. At the same time, the isolation chamber 102 seals the electrolyte, preventing it from contacting the air and solving the problem of electrolyte overflow causing the electrolyte to come into contact with oxygen and burn.

[0052] Specifically, the compressed liquid inside the compressed bottle 108 is transferred to the sealing bag 107, which then squeezes the insulating oil inside the isolation plate 103 and the housing 101. This causes the mixed liquid at the bottom of the isolation plate 103 and the housing 101 to be transferred to the inner cavity of the isolation chamber 102 through the connecting pipe.

[0053] In a preferred embodiment: the heat dissipation assembly 3 includes a connecting shell 301, a liquid pump 302 is fixedly mounted on the bottom inner wall of the connecting shell 301, one end of a heat dissipation fin 303 is fixedly mounted on the discharge end of the liquid pump 302, and a discharge pipe 304 is fixedly mounted on the other end of the heat dissipation fin 303. The two input ends of the liquid pump 302 are respectively connected to the cavity formed by the two sets of isolation plates 103 and the shell 101. The two sets of discharge pipes 304 are respectively connected to the cavity formed by the two sets of isolation plates 103 and the shell 101. A cooling fan 305 is provided on the top of the liquid pump 302. A cover plate 306 is fixedly mounted on the outer wall of the connecting shell 301 away from the outer shell assembly 1. An air inlet 307 is opened on the outer wall opposite to the cooling fan 305. An air outlet 308 is opened on both sides of the outer wall of the cover plate 306.

[0054] In the above structure, the insulating oil in the cavity formed by the two sets of isolation plates 103 and the housing 101 is transferred to the heat dissipation fin 303 by the liquid pump 302, and then transferred back to the cavity formed by the two sets of isolation plates 103 and the housing 101 through the discharge pipe 304. The air is drawn in through the air inlet 307 and discharged through the air outlet 308, so that the air dissipates heat from the heat dissipation fin 303.

[0055] A conductive plate 41 is provided on the top of the battery body 4. The battery body 4 is composed of several battery cells, which are electrically connected through the conductive plate 41.

[0056] The outer wall of the conductive plate 41 is respectively fitted with a limiting plate 42 and a cutting plate 43. The bottom of the limiting plate 42 and the cutting plate 43 are fixedly assembled with a base 44, and the inner cavity of the cutting plate 43 is connected to a conduit 45.

[0057] The cutting board 43 is in a retracted state.

[0058] The conduit 45 connects to the inner cavity of the cutting plate 43. When the cutting plate 43 is in a contracted state, the sealing bag 107 expands towards the side closer to the battery body 4, thereby reducing the space of the inner cavity of the separator 103 and the housing 101. The insulating oil located in the inner cavity of the separator 103 and the housing 101 is squeezed into the inner cavity of the cutting plate 43 by the expansion of the sealing bag 107 through the conduit 45, causing the cutting plate 43 to change from a contracted state to a stretched state.

[0059] By limiting the conductive plate 41 with the limiting plate 42, the cutting plate 43 can cut the conductive plate 41 through the limiting plate 42, thereby eliminating the electrical connection between several battery cells.

[0060] Working principle: The insulating oil in the cavity formed by the two sets of isolation plates 103 and the housing 101 is transferred to the heat dissipation fin 303 by the liquid pump 302, and then transferred back to the cavity formed by the two sets of isolation plates 103 and the housing 101 through the discharge pipe 304. The cooling fan 305 runs, and the air adsorbed through the air inlet 307 is discharged through the air outlet 308, so that the air dissipates heat from the heat dissipation fin 303.

[0061] The battery control panel 2 detects the state of the battery body 4 through a temperature sensor. When the temperature of the battery body 4 reaches a threshold, the value detected by the temperature sensor increases. The discharge end of the compression bottle 108 is connected to the inner cavity of the two sets of sealing bags 107. The battery control panel 2 controls the compression bottle 108 to transfer the insulating oil compressed in the inner cavity of the compression bottle 108 to the sealing bag 107. The sealing bag 107 is placed on the inner wall of the buffer sponge 104, causing the sealing bag 107 to expand towards the side closer to the battery body 4. This reduces the space of the separator plate 103 and the inner cavity of the shell 101. The insulating oil in the inner cavity of the separator plate 103 and the shell 101 is squeezed into the inner cavity of the battery body 4 through the rupture of the battery body 4 by the expansion of the sealing bag 107. The insulating oil covers the positive and negative electrode cells in the inner cavity of the battery body 4, so that the positive and negative electrode cells are insulated by the insulating oil, thereby preventing the battery body 4 from further releasing positive and negative ions and causing the battery body 4 to expand and burn due to heat.

[0062] Meanwhile, the electrolyte inside the battery body 4 is squeezed out by the insulating oil and will be deposited below the insulating oil due to density. The liquid at the bottom is transferred to the inner cavity of the isolation chamber 102 through a one-way valve and connecting pipe.

[0063] By separating the electrolyte into the isolation chamber 102, the electrolyte and the battery body 4 are separated, reducing the possibility of the battery body 4 burning. At the same time, the isolation chamber 102 seals the electrolyte, preventing it from contacting the air and solving the problem of electrolyte overflow causing it to come into contact with oxygen and burn.

[0064] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0065] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof lithium battery, comprising a casing assembly (1), characterized in that: A battery control panel (2) is embedded in one side of the outer wall of the housing assembly (1), and a heat dissipation assembly (3) is fixedly installed on the other side of the outer wall of the housing assembly (1). A battery body (4) is snapped into the inner cavity of the housing assembly (1). A connector (5) is fixedly installed on both the positive and negative terminals of the battery body (4). The power input terminal of the battery control panel (2) is electrically connected to the connector (5). The outer casing assembly (1) includes a casing (101). Isolation chambers (102) are fixedly installed on both sides of the inner wall of the casing (101) near the battery control panel (2). Isolation plates (103) are fixedly installed on both sides of the casing (101) near the heat dissipation assembly (3). The two battery bodies (4) are located in the space formed by the two isolation plates (103) and the casing (101). Buffer sponge I (104) is fixedly installed on both sides of the inner wall of the casing (101). A sealing bag (107) is adhered to the inner wall of the buffer sponge I (104). Buffer sponge II (105) is fixedly installed on the inner wall of the casing (101) near the heat dissipation assembly (3). A fixing plate (106) is fixedly installed on the top of the isolation plate (103). A compression bottle (108) is snapped between the two isolation plates (103). A temperature sensor is provided on the side of the two isolation plates (103) near the battery body (4). The space formed by the isolation plate (103) and the shell (101) is filled with insulating oil, and the discharge end of the compression bottle (108) is connected to the inner cavity of the two sets of sealing bags (107). The compression bottle (108) includes an electronic sealing valve for controlling the liquid discharge of the compression bottle (108), and the electronic sealing valve is electrically connected to the battery control panel (2), which includes a backup power supply. The density of insulating oil is greater than that of electrolyte. Both sets of isolation chambers (102) are connected to the space formed by the two sets of isolation plates (103) and the shell (101) through connecting pipes, and the connecting pipes are located at the bottom of the isolation chambers (102). One-way valves are provided at the connection between the isolation chamber (102) and the connecting pipe, and at the top of the isolation chamber (102).

2. The explosion-proof lithium battery according to claim 1, characterized in that: The fixing plate (106) is located on the top of the battery body (4). The battery body (4) is abutted by buffer sponge one (104) and buffer sponge two (105). Flow grooves are opened on the side of buffer sponge one (104) and buffer sponge two (105) near the battery body (4).

3. The explosion-proof lithium battery according to claim 2, characterized in that: The heat dissipation assembly (3) includes a connecting shell (301). A liquid pump (302) is fixedly mounted on the bottom inner wall of the connecting shell (301). One end of a heat dissipation fin (303) is fixedly mounted on the discharge end of the liquid pump (302). The other end of the heat dissipation fin (303) is fixedly mounted on a discharge pipe (304). The two input ends of the liquid pump (302) are respectively connected to the cavity formed by the two sets of isolation plates (103) and the shell (101). The outlet pipe (304) is connected to the cavity formed by the two sets of isolation plates (103) and the housing (101). A cooling fan (305) is provided on the top of the liquid pump (302). A cover plate (306) is fixedly installed on the outer wall of the connecting shell (301) away from the outer shell assembly (1). An air inlet (307) is opened on the outer wall opposite to the cover plate (306) and the cooling fan (305). An air outlet (308) is opened on the outer walls on both sides of the cover plate (306).

4. The explosion-proof lithium battery according to claim 1, characterized in that: A conductive plate (41) is provided on the top of the battery body (4). The battery body (4) is composed of several battery cells, and the several battery cells are electrically connected through the conductive plate (41). The outer wall of the conductive plate (41) is respectively fitted with a limiting plate (42) and a cutting plate (43). The bottom of the limiting plate (42) and the cutting plate (43) is fixedly fitted with a base (44). The inner cavity of the cutting plate (43) is connected to a conduit (45). The cutting board (43) is in a retracted state.

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