Lithium battery charging box with thermal runaway prevention and control function and thermal runaway prevention and control method

Abstract

The invention relates to a lithium battery charging box with a thermal runaway prevention and control function and a thermal runaway prevention and control method.The lithium battery charging box comprises a charging box body, the charging box body comprises a first box body, a second box body, a third box body and a control device, the second box body is arranged at the top of the first box body, and the third box body is arranged at the top of the second box body; the control device is arranged at the top of the third box body; a first accommodating cavity is formed in the first box body; a first smoke sensor, a first temperature sensor and a first gas sensor are arranged at the top of the first accommodating cavity; a second accommodating cavity is formed in the second box body; a second smoke sensor, a second temperature sensor and a second gas sensor are arranged at the top of the second accommodating cavity; a third containing cavity is formed in the third box body, and a third smoke sensor, a third temperature sensor and a third gas sensor are arranged on the top of the third containing cavity. The system has the characteristics of passive fire extinguishing, real-time early warning, ventilation cooling and automatic power off.

Description

Technical Field

[0001] The present invention relates to a lithium battery charging box with a thermal runaway prevention and control function and a thermal runaway prevention and control method. Background Art

[0002] With the development of lithium-ion battery technology, lithium-ion batteries are widely used in drones. Due to the high energy density and capacity of these batteries, thermal runaway is easily caused during the charging process, resulting in loss of life and property. Battery charging cabinets play a key role in ensuring the safe, economical and efficient development of industries such as drones. The invention mainly provides the prevention and control function of thermal runaway of battery charging and discharging operations. The invention relates to a thermal runaway early warning method and fire safety technology for the charging and discharging process of drone lithium batteries.

[0003] The existing automatic charging system for drone batteries is mainly the DJI BS60 smart battery box, which includes a charger, a cooling system, an electronic load, a control panel, etc. Since the drone battery charging process is unprotected, the drone battery is damaged. The invention patent "A drone lithium battery charging box" uses a groove method to increase the protection of the battery. The existing drone charging compartment is large in size, and the fixed charging slot leads to an increase in volume and low efficiency. The invention patent "A drone battery automatic charging compartment and its working method" proposes to integrate the charger, electronic load, cooling fan, control panel, battery guide device, and indicator light into one, which minimizes the volume. However, the above patents do not have the function of preventing and controlling safety accidents during the drone battery charging process. Once the battery has thermal runaway during the charging process, it will not only affect the normal operation of the drone, but also cause casualties and property losses. Therefore, we have made improvements to this and proposed a lithium battery charging box with thermal runaway prevention and control function. Summary of the invention

[0004] In view of the above-mentioned problems existing in the prior art, the main purpose of the present invention is to provide a lithium battery charging box with thermal runaway prevention and control function and a thermal runaway prevention and control method.

[0005] The technical solution of the present invention is as follows:

[0006] A lithium battery charging box with thermal runaway prevention and control function and a thermal runaway prevention and control method, the lithium battery charging box includes a charging box body, the charging box body includes a first box body, a second box body, a third box body and a control device, the second box body is fixedly arranged on the top of the first box body, the third box body is fixedly arranged on the top of the second box body, and the control device is fixedly arranged on the top of the third box body, wherein:

[0007] The first housing has a first accommodating cavity inside, a first battery tray is arranged at the bottom of the first accommodating cavity, and the first battery tray is used to place the battery to be charged, a first smoke sensor, a first temperature sensor and a first gas sensor are fixedly arranged at the top of the first accommodating cavity, a first mounting hole and a second mounting hole are arranged on the rear side wall of the second housing, a first warning fan is fixed in the first mounting hole, and a second warning fan is fixed in the second mounting hole;

[0008] The second housing has a second accommodating cavity inside, a second battery tray is arranged at the bottom of the second accommodating cavity, and the second battery tray is used to place batteries to be charged, a second smoke sensor, a second temperature sensor and a second gas sensor are fixedly arranged at the top of the second accommodating cavity, and a third mounting hole and a fourth mounting hole are arranged on the rear side wall of the second housing, a first warning fan is fixed in the third mounting hole, and a second warning fan is fixed in the fourth mounting hole;

[0009] The third housing has a third accommodating cavity inside, a third battery tray is arranged at the bottom of the third accommodating cavity, the third battery tray is used to place batteries to be charged, a third smoke sensor, a third temperature sensor and a third gas sensor are fixedly arranged at the top of the third accommodating cavity, a fifth mounting hole and a sixth mounting hole are arranged on the rear side wall of the third housing, a first early warning fan is fixed in the fifth mounting hole, and a second early warning fan is fixed in the sixth mounting hole;

[0010] The control device comprises a control housing, a circuit board is fixedly arranged inside the control housing, the first smoke sensor, the first temperature sensor, the first gas sensor, the second smoke sensor, the second temperature sensor, the second gas sensor, the third smoke sensor, the third temperature sensor and the third gas sensor are electrically connected to the circuit board respectively, and a touch screen is arranged on the front side plate of the control housing, and the touch screen is electrically connected to the circuit board;

[0011] The control device has a first-level warning function and a second-level warning function. The first-level warning threshold and the second-level warning threshold are manually input through the touch screen. When the battery starts to charge, the first warning fan and the second warning fan are not turned on.

[0012] When the monitoring data of any gas, smoke or temperature sensor among the first smoke sensor, the first temperature sensor, the first gas sensor, the second smoke sensor, the second temperature sensor, the second gas sensor, the third smoke sensor, the third temperature sensor and the third gas sensor reaches the first-level warning threshold, a first-level warning signal is issued and the charging power supply is automatically powered off, and the corresponding first warning fan is automatically turned on;

[0013] When the monitoring data of the first smoke sensor, the first temperature sensor, the first gas sensor, the second smoke sensor, the second temperature sensor, the second gas sensor, the third smoke sensor, the third temperature sensor and any gas, smoke or temperature sensor among the third gas sensor reaches the second warning threshold, a second warning signal is issued and the corresponding second warning fan is automatically turned on.

[0014] A first fireproof layer is fixedly provided on the left side wall of the first accommodating cavity, a second fireproof layer is fixedly provided on the right side wall of the first accommodating cavity, and a third fireproof layer is fixedly provided on the top side wall of the first accommodating cavity;

[0015] The first fireproof layer, the second fireproof layer and the third fireproof layer are all made of silicon dioxide material.

[0016] A fourth fireproof layer is fixedly provided on the left side wall of the second accommodating cavity, a fifth fireproof layer is fixedly provided on the right side wall of the second accommodating cavity, and a sixth fireproof layer is fixedly provided on the top side wall of the second accommodating cavity;

[0017] The fourth fireproof layer, the fifth fireproof layer and the sixth fireproof layer are all made of silicon dioxide material.

[0018] A seventh fireproof layer is fixedly provided on the left side wall of the third accommodating cavity, an eighth fireproof layer is fixedly provided on the right side wall of the third accommodating cavity, and a ninth fireproof layer is fixedly provided on the top side wall of the third accommodating cavity;

[0019] The seventh fireproof layer, the eighth fireproof layer and the ninth fireproof layer are all made of silicon dioxide material.

[0020] A first push-pull protrusion is longitudinally fixedly disposed on the left side wall of the first battery tray, and a first guide slot is longitudinally disposed on the bottom of the left side wall of the first accommodating cavity, and the first push-pull protrusion slides forward and backward in the first guide slot;

[0021] A second push-pull protrusion is longitudinally fixedly disposed on the right side wall of the first battery tray, a second guide slot is longitudinally disposed on the bottom of the right side wall of the first accommodating cavity, and the second push-pull protrusion slides forward and backward in the second guide slot;

[0022] The first battery tray is pulled out of or pushed into the first accommodating cavity by the cooperation between the first push-pull protrusion and the first guide slot and the cooperation between the second push-pull protrusion and the second guide slot.

[0023] The front side of the first box body is designed to be open, and a first box cover is provided on the front side of the first box body, and the first accommodating cavity is sealed by the first box cover;

[0024] The side wall of the first box body is composed of three layers of first fire extinguishing panels, a first aerogel layer and a first stainless steel plate from the inside to the outside, and the first box cover is provided with a first transparent window;

[0025] The first fire extinguishing plate is made of paraffin, and the first shell is filled with fire extinguishing material. The first shell of the first fire extinguishing plate melts when encountering the high temperature of flame and releases the fire extinguishing material therein.

[0026] A third push-pull protrusion is longitudinally fixedly disposed on the left side wall of the second battery tray, and a third guide slot is longitudinally disposed on the bottom of the left side wall of the second accommodating cavity, and the third push-pull protrusion slides forward and backward in the third guide slot;

[0027] A fourth push-pull protrusion is longitudinally fixedly disposed on the right side wall of the second battery tray, a fourth guide slot is longitudinally disposed on the bottom of the right side wall of the second accommodating cavity, and the fourth push-pull protrusion slides forward and backward in the fourth guide slot;

[0028] The second battery tray is pulled out of or pushed into the second accommodating cavity through the cooperation between the third push-pull protrusion and the third guide slot and the cooperation between the fourth push-pull protrusion and the fourth guide slot.

[0029] The front side of the second box body is designed to be open, and a second box cover is provided on the front side of the second box body, and the second accommodating cavity is sealed by the second box cover;

[0030] The side wall of the second box body is composed of three layers of second fire extinguishing panels, a second aerogel layer and a second stainless steel plate from the inside to the outside, and a second transparent window is provided on the second box cover;

[0031] The second fire extinguishing plate is made of paraffin, and the second outer shell is filled with fire extinguishing material. The second outer shell of the second fire extinguishing plate melts when encountering the high temperature of flame and releases the fire extinguishing material therein.

[0032] A fifth push-pull protrusion is fixedly disposed longitudinally on the left side wall of the third battery tray, a fifth guide slot is longitudinally disposed at the bottom of the left side wall of the third accommodating cavity, and the fifth push-pull protrusion slides forward and backward in the fifth guide slot;

[0033] A sixth push-pull protrusion is longitudinally fixedly disposed on the right side wall of the third battery tray, a sixth guide slot is longitudinally disposed on the bottom of the right side wall of the third accommodating cavity, and the sixth push-pull protrusion slides forward and backward in the sixth guide slot;

[0034] The third battery tray is pulled out of or pushed into the third accommodating cavity through the cooperation between the fifth push-pull protrusion and the fifth guide slot and the cooperation between the sixth push-pull protrusion and the sixth guide slot.

[0035] The front side of the third box body is designed to be open, and a third box cover is provided on the front side of the third box body, and the third containing cavity is sealed by the third box cover;

[0036] The side wall of the third box body is composed of three layers of third fire extinguishing panels, a third aerogel layer and a third stainless steel plate from the inside to the outside, and the third box cover is provided with a third transparent window;

[0037] The third fire extinguishing plate is made of paraffin, and the third outer shell is filled with fire extinguishing material. The third outer shell of the third fire extinguishing plate melts when encountering the high temperature of flame and releases the fire extinguishing material therein.

[0038] The present invention has the following advantages and beneficial effects: a lithium battery charging box with thermal runaway prevention and control function and a thermal runaway prevention and control method provided by an embodiment of the present invention have a first-level warning function and a second-level warning function, and the first-level warning threshold and the second-level warning threshold are manually input through the touch screen. When the battery starts to charge, the first warning fan and the second warning fan are not turned on; when the monitoring data of any one of the first smoke sensor, the first temperature sensor, the first gas sensor, the second smoke sensor, the second temperature sensor, the second gas sensor, the third smoke sensor, the third temperature sensor and the third gas sensor reaches the first-level warning threshold, a first-level warning signal is issued and the charging power supply is automatically powered off, and the corresponding first warning fan is automatically turned on at the same time; when the monitoring data of any one of the first smoke sensor, the first temperature sensor, the first gas sensor, the second smoke sensor, the second temperature sensor, the second gas sensor, the third smoke sensor, the third temperature sensor and the third gas sensor reaches the second-level warning threshold, a second-level warning signal is issued, and the corresponding second warning fan is automatically turned on, thereby achieving the purpose of linkage warning. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of a lithium battery charging box with thermal runaway prevention and control function provided in accordance with an embodiment of the present invention.

[0040] Figure 2 A schematic diagram of the three-dimensional structure of a lithium battery charging box with thermal runaway prevention and control function in one direction provided in an embodiment of the present invention.

[0041] Figure 3 A schematic diagram of the three-dimensional structure in one direction of a lithium battery charging box with thermal runaway prevention and control function provided in an embodiment of the present invention after removing the first box cover, the second box cover and the third box cover.

[0042] Figure 4 A schematic diagram of the three-dimensional structure of a lithium battery charging box with thermal runaway prevention and control function provided in an embodiment of the present invention from another direction.

[0043] Figure 5 A schematic diagram of the three-dimensional structure in another direction of the lithium battery charging box with thermal runaway prevention and control function provided in an embodiment of the present invention after removing the first box cover, the second box cover and the third box cover.

[0044] Figure 6 A schematic diagram of a three-dimensional structure in which a first box body, a second box body and a third box body cooperate with each other according to an embodiment of the present invention. DETAILED DESCRIPTION

[0045] 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, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0047] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0049] like Figures 1 to 6As shown: a lithium battery charging box with thermal runaway prevention and control function and a thermal runaway prevention and control method according to an embodiment of the present invention, the lithium battery charging box comprises a charging box body 100, the charging box body 100 comprises a first box body 110, a second box body 120, a third box body 130 and a control device 140, the second box body 120 is fixedly arranged on the top of the first box body 110, the third box body 130 is fixedly arranged on the top of the second box body 120, and the control device 140 is fixedly arranged on the top of the third box body 130, wherein:

[0050] The first housing 110 has a first accommodating cavity 111 inside, a first battery tray 112 is arranged at the bottom of the first accommodating cavity 111, the first battery tray 112 is used to place the battery 200 to be charged, a first smoke sensor 113, a first temperature sensor 114 and a first gas sensor 115 are fixedly arranged on the top of the first accommodating cavity 111, a first mounting hole (not shown in the figure) and a second mounting hole (not shown in the figure) are arranged on the rear side wall of the first housing 110, a first warning fan 116 is fixedly arranged in the first mounting hole, and a second warning fan 126 is fixedly arranged in the second mounting hole; wherein the first gas sensor 115 is one or both or more of an H2 sensor, a CO sensor, a CO2 sensor or an electrolyte sensor;

[0051] The second housing 120 has a second accommodating cavity 121 inside, a second battery tray 122 is arranged at the bottom of the second accommodating cavity 121, and the second battery tray 122 is used to place the battery to be charged, and a second smoke sensor 123, a second temperature sensor 124 and a second gas sensor 125 are fixedly arranged on the top of the second accommodating cavity 121, and a third mounting hole (not shown in the figure) and a fourth mounting hole (not shown in the figure) are arranged on the rear side wall of the second housing 120, a first warning fan 116 is fixedly arranged in the third mounting hole, and a second warning fan 126 is fixedly arranged in the fourth mounting hole; wherein the second gas sensor 125 is one or both or more of an H2 sensor, a CO sensor, a CO2 sensor or an electrolyte sensor;

[0052] The third housing 130 has a third accommodating cavity 131 inside, a third battery tray 132 is arranged at the bottom of the third accommodating cavity 131, and the third battery tray 132 is used to place the battery to be charged, and a third smoke sensor 133, a third temperature sensor 134 and a third gas sensor 135 are fixedly arranged on the top of the third accommodating cavity 130, and a fifth mounting hole (not shown in the figure) and a sixth mounting hole (not shown in the figure) are arranged on the rear side wall of the third housing 130, a first warning fan 116 is arranged in the fifth mounting hole, and a second warning fan 126 is fixedly arranged in the sixth mounting hole; wherein the third gas sensor 135 is one or both or more of an H2 sensor, a CO sensor, a CO2 sensor or an electrolyte sensor;

[0053] The control device 140 includes a control shell 141, in which a circuit board (not shown in the figure) is fixedly arranged inside the control shell 141, and the first smoke sensor 113, the first temperature sensor 114, the first gas sensor 115, the second smoke sensor 123, the second temperature sensor 124, the second gas sensor 125, the third smoke sensor 133, the third temperature sensor 134 and the third gas sensor 135 are electrically connected to the circuit board respectively, and the front side panel of the control shell 141 is provided with a touch screen 142, and the touch screen 142 is electrically connected to the circuit board.

[0054] In the present invention, the control device 140 has a first-level warning function and a second-level warning function, and the first-level warning threshold and the second-level warning threshold are manually input through the touch screen 142. When the battery starts to charge, the first warning fan 116 and the second warning fan 126 are not turned on; when the monitoring data of any one of the first smoke sensor 113, the first temperature sensor 114, the first gas sensor 115, the second smoke sensor 123, the second temperature sensor 124, the second gas sensor 125, the third smoke sensor 133, the third temperature sensor 134 and the third gas sensor 135 reaches the first-level warning threshold, a first-level warning signal is issued and the charging power supply is automatically powered off, and the corresponding first warning fan 116 is automatically turned on, that is: when the monitoring data of any one of the first smoke sensor 113, the first temperature sensor 114 and the first gas sensor 115 in the first box 110 reaches the first-level warning threshold, a first-level warning signal is issued and the charging power supply is automatically powered off, and the first warning fan 116 in the first box 110 is automatically turned on;

[0055] When the monitoring data of any one of the second smoke sensor 123, the second temperature sensor 124, and the second gas sensor 125 in the second box 120 reaches the first-level warning threshold, a first-level warning signal is issued and the charging power supply is automatically powered off, and the first warning fan 116 in the second box 110 is automatically turned on;

[0056] When the monitoring data of any one of the third smoke sensor 133, the third temperature sensor 134, and the third gas sensor 135 in the third box 130 reaches the first-level warning threshold, a first-level warning signal is issued and the charging power supply is automatically powered off, and the first warning fan 116 in the third box 130 is automatically turned on;

[0057] When the monitoring data of any one of the first smoke sensor 113, the first temperature sensor 114, the first gas sensor 115, the second smoke sensor 123, the second temperature sensor 124, the second gas sensor 125, the third smoke sensor 133, the third temperature sensor 134 and the third gas sensor 135 reaches the secondary warning threshold, a secondary warning signal is issued, and the corresponding second warning fan 126 is automatically turned on to achieve the purpose of linkage warning, that is: when the monitoring data of any one of the first smoke sensor 113, the first temperature sensor 114 and the first gas sensor 115 inside the first box 110 reaches the secondary warning threshold, a secondary warning signal is issued and the charging power supply is automatically cut off, and the second warning fan 126 in the first box 110 is automatically turned on;

[0058] When the monitoring data of any one of the second smoke sensor 123, the second temperature sensor 124, and the second gas sensor 125 in the second box 120 reaches the second warning threshold, a second warning signal is issued and the charging power supply is automatically powered off, and the second warning fan 126 in the second box 110 is automatically turned on;

[0059] When the monitoring data of any one of the third smoke sensor 133, the third temperature sensor 134, and the third gas sensor 135 inside the third box 130 reaches the first-level warning threshold, a second-level warning signal is issued and the charging power supply is automatically cut off, and the second warning fan 126 in the third box 130 is automatically turned on.

[0060] A first fireproof layer 117 is fixedly provided on the left side wall of the first accommodating cavity 111, a second fireproof layer (not shown in the figure) is fixedly provided on the right side wall of the first accommodating cavity 111, and a third fireproof layer 118 is fixedly provided on the rear side wall of the first accommodating cavity 111 below the first mounting hole. The first fireproof layer 117, the second fireproof layer and the third fireproof layer 118 are all made of silicon dioxide material.

[0061] The left side wall of the second accommodating cavity 121 is fixedly provided with a fourth fireproof layer 127, the right side wall of the second accommodating cavity is fixedly provided with a fifth fireproof layer (not shown in the figure), and the rear side wall of the second accommodating cavity 121 is fixedly provided with a sixth fireproof layer 128 below the second mounting hole. The fourth fireproof layer 127, the fifth fireproof layer and the sixth fireproof layer 128 are all made of silicon dioxide material.

[0062] The left side wall of the third accommodating cavity 131 is fixedly provided with a seventh fireproof layer 137, the right side wall of the third accommodating cavity 131 is fixedly provided with an eighth fireproof layer (not shown in the figure), and the rear side wall of the third accommodating cavity 131 is located below the third mounting hole and is fixedly provided with a ninth fireproof layer 138. The seventh fireproof layer 137, the eighth fireproof layer and the ninth fireproof layer 138 are all made of silicon dioxide material.

[0063] A first push-pull protrusion 151 is longitudinally fixedly provided on the left side wall of the first battery tray 112, and a first guide groove (not shown in the figure) is longitudinally provided on the bottom of the left side wall of the first accommodating cavity 111, and the first push-pull protrusion 151 slides back and forth in the first guide groove; a second push-pull protrusion 152 is longitudinally fixedly provided on the right side wall of the first battery tray 112, and a second guide groove (not shown in the figure) is longitudinally provided on the bottom of the right side wall of the first accommodating cavity 111, and the second push-pull protrusion 152 slides back and forth in the second guide groove; the first battery tray 112 is pulled out or pushed into the first accommodating cavity 111 through the cooperation of the first push-pull protrusion 151 and the first guide groove and the cooperation of the second push-pull protrusion 152 and the second guide groove, that is, the first battery tray 112 can be quickly pulled out or pushed into the first accommodating cavity 111 of the first box body 110, so as to be used for quickly placing or taking out lithium batteries on the first battery tray 112 in the first box body 110, and has the characteristics of convenient and quick operation.

[0064] The front side of the first box body 110 is designed to be open, and a first box cover 153 is provided on the front side of the first box body 110, and the first accommodating cavity 111 is sealed by the first box cover 153;

[0065] The side walls of the first box body 110 are composed of three layers of first fire extinguishing plates (not shown in the figure), a first aerogel layer and a first stainless steel plate from the inside to the outside, and a first transparent window 154 is provided on the first box cover 153; the first outer shell of the first fire extinguishing plate is made of paraffin, and the first outer shell is filled with fire extinguishing material. When the lithium battery in the first box body 110 thermally runs away and catches fire, the first outer shell of the first fire extinguishing plate encounters the high temperature of the flame to melt and release the fire extinguishing material therein, and the fire extinguishing material submerges the burning lithium battery and extinguishes the flame, thereby achieving the purpose of extinguishing the fire.

[0066] A third push-pull protrusion 155 is longitudinally fixedly provided on the left side wall of the second battery tray 122, and a third guide groove (not shown in the figure) is longitudinally provided on the bottom of the left side wall of the second accommodating cavity 121, and the third push-pull protrusion 155 slides back and forth in the third guide groove; a fourth push-pull protrusion 156 is longitudinally fixedly provided on the right side wall of the second battery tray 122, and a fourth guide groove (not shown in the figure) is longitudinally provided on the bottom of the right side wall of the second accommodating cavity 121, and the fourth push-pull protrusion 156 slides back and forth in the fourth guide groove; the second battery tray 122 is pulled out or pushed into the second accommodating cavity 121 through the cooperation of the third push-pull protrusion 155 and the third guide groove and the cooperation of the fourth push-pull protrusion 156 and the fourth guide groove, that is, the second battery tray 122 can be quickly pulled out or pushed into the second accommodating cavity 121 of the second box body 120, so as to be used for quickly placing or taking out lithium batteries from the second battery tray 122 in the second box body 120, which has the characteristics of convenient and quick operation.

[0067] The front side of the second box body 120 is designed to be open, and a second box cover 157 is provided on the front side of the second box body 120, and the second accommodating cavity 121 is sealed by the second box cover 157;

[0068] The side walls of the second box body 120 are composed of three layers of second fire extinguishing plates (not shown in the figure), a second aerogel layer and a second stainless steel plate from the inside to the outside, and a second transparent window 158 is provided on the second box cover 157; the second outer shell of the second fire extinguishing plate is made of paraffin, and the second outer shell is filled with fire extinguishing material. When the lithium battery in the second box body 120 thermally runs away and catches fire, the second outer shell of the second fire extinguishing plate encounters the high temperature of the flame to melt and release the fire extinguishing material therein, and the fire extinguishing material submerges the burning lithium battery and extinguishes the flame, thereby achieving the purpose of extinguishing the fire.

[0069] A fifth push-pull protrusion 159 is longitudinally fixedly provided on the left side wall of the third battery tray 132, and a fifth guide slot (not shown in the figure) is longitudinally provided on the bottom of the left side wall of the third accommodating cavity 131, and the fifth push-pull protrusion 159 slides forward and backward in the fifth guide slot; a sixth push-pull protrusion 160 is longitudinally fixedly provided on the right side wall of the third battery tray 132, and a sixth guide slot (not shown in the figure) is longitudinally provided on the bottom of the right side wall of the third accommodating cavity, and the sixth push-pull protrusion 160 slides forward and backward in the sixth guide slot; the third battery tray 132 is pulled out or pushed into the third accommodating cavity 131 through the cooperation of the fifth push-pull protrusion 159 and the fifth guide slot and the cooperation of the sixth push-pull protrusion 160 and the sixth guide slot, that is, the third battery tray 132 can be quickly pulled out or pushed into the third accommodating cavity 131 of the third box body 130, so as to quickly put in or take out the lithium battery on the third battery tray 132 in the third box body 130, which has the characteristics of convenient and quick operation.

[0070] The front side of the third box body 130 is designed to be open, and a third box cover 161 is provided on the front side of the third box body 130, and the third accommodating cavity 131 is sealed by the third box cover 161;

[0071] The side walls of the third box body 130 are composed of three layers of third fire extinguishing plates (not shown in the figure), a third aerogel layer and a third stainless steel plate from the inside to the outside, and a third transparent window 162 is provided on the third box cover 161; the third outer shell of the third fire extinguishing plate is made of paraffin, and the third outer shell is filled with fire extinguishing material. When the lithium battery in the third box body 130 thermally runs away and catches fire, the third outer shell of the third fire extinguishing plate encounters the high temperature of the flame to melt and release the fire extinguishing material therein, and the fire extinguishing material submerges the burning lithium battery and extinguishes the flame, thereby achieving the purpose of extinguishing the fire.

[0072] In the present invention, the first fire extinguishing plate, the second fire extinguishing plate and the third fire extinguishing plate are all made of paraffin. The fire extinguishing principle of the present invention is: when the lithium battery 200 in the first box 110 catches fire due to thermal runaway, the flame temperature of the thermal runaway lithium battery will break through the ignition point of the first fire extinguishing plate on the inner wall of the first box 110, and then the first shell of the first fire extinguishing plate melts, and the first shell of the first fire extinguishing plate releases the fire extinguishing material therein to cover the lithium battery that is on fire due to thermal runaway, thereby achieving the purpose of fire extinguishing; the fire extinguishing principle of the second box 120 and the third box 130 is the same as that of the first box 110. At the same time, the fire extinguishing material is made of silica material.

[0073] Finally, it should be noted that the above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lithium battery charging box with thermal runaway prevention and control function and a thermal runaway prevention and control method, characterized in that: The lithium battery charging box includes a charging box body, the charging box body includes a first box body, a second box body, a third box body and a control device, the second box body is fixedly arranged on the top of the first box body, the third box body is fixedly arranged on the top of the second box body, and the control device is fixedly arranged on the top of the third box body, wherein: The first housing has a first accommodating cavity inside, a first battery tray is arranged at the bottom of the first accommodating cavity, and the first battery tray is used to place the battery to be charged, a first smoke sensor, a first temperature sensor and a first gas sensor are fixedly arranged at the top of the first accommodating cavity, a first mounting hole and a second mounting hole are arranged on the rear side wall of the second housing, a first warning fan is fixed in the first mounting hole, and a second warning fan is fixed in the second mounting hole; The second housing has a second accommodating cavity inside, a second battery tray is arranged at the bottom of the second accommodating cavity, and the second battery tray is used to place batteries to be charged, a second smoke sensor, a second temperature sensor and a second gas sensor are fixedly arranged at the top of the second accommodating cavity, and a third mounting hole and a fourth mounting hole are arranged on the rear side wall of the second housing, a first warning fan is fixed in the third mounting hole, and a second warning fan is fixed in the fourth mounting hole; The third housing has a third accommodating cavity inside, a third battery tray is arranged at the bottom of the third accommodating cavity, the third battery tray is used to place batteries to be charged, a third smoke sensor, a third temperature sensor and a third gas sensor are fixedly arranged at the top of the third accommodating cavity, a fifth mounting hole and a sixth mounting hole are arranged on the rear side wall of the third housing, a first early warning fan is fixed in the fifth mounting hole, and a second early warning fan is fixed in the sixth mounting hole; The control device comprises a control housing, a circuit board is fixedly arranged inside the control housing, the first smoke sensor, the first temperature sensor, the first gas sensor, the second smoke sensor, the second temperature sensor, the second gas sensor, the third smoke sensor, the third temperature sensor and the third gas sensor are electrically connected to the circuit board respectively, and a touch screen is arranged on the front side plate of the control housing, and the touch screen is electrically connected to the circuit board; The control device has a first-level warning function and a second-level warning function. The first-level warning threshold and the second-level warning threshold are manually input through the touch screen. When the battery starts to charge, the first warning fan and the second warning fan are not turned on. When the monitoring data of any gas, smoke or temperature sensor among the first smoke sensor, the first temperature sensor, the first gas sensor, the second smoke sensor, the second temperature sensor, the second gas sensor, the third smoke sensor, the third temperature sensor and the third gas sensor reaches the first-level warning threshold, a first-level warning signal is issued and the charging power supply is automatically powered off, and the corresponding first warning fan is automatically turned on; When the monitoring data of the first smoke sensor, the first temperature sensor, the first gas sensor, the second smoke sensor, the second temperature sensor, the second gas sensor, the third smoke sensor, the third temperature sensor and any gas, smoke or temperature sensor among the third gas sensor reaches the second warning threshold, a second warning signal is issued and the corresponding second warning fan is automatically turned on.

2. The lithium battery charging box with thermal runaway prevention and control function and the thermal runaway prevention and control method according to claim 1, characterized in that: A first fireproof layer is fixedly provided on the left side wall of the first accommodating cavity, a second fireproof layer is fixedly provided on the right side wall of the first accommodating cavity, and a third fireproof layer is fixedly provided on the top side wall of the first accommodating cavity; The first fireproof layer, the second fireproof layer and the third fireproof layer are all made of silicon dioxide material.

3. The lithium battery charging box with thermal runaway prevention and control function and the thermal runaway prevention and control method according to claim 1, characterized in that: A fourth fireproof layer is fixedly provided on the left side wall of the second accommodating cavity, a fifth fireproof layer is fixedly provided on the right side wall of the second accommodating cavity, and a sixth fireproof layer is fixedly provided on the top side wall of the second accommodating cavity; The fourth fireproof layer, the fifth fireproof layer and the sixth fireproof layer are all made of silicon dioxide material.

4. The lithium battery charging box with thermal runaway prevention and control function and the thermal runaway prevention and control method according to claim 1, characterized in that: A seventh fireproof layer is fixedly provided on the left side wall of the third accommodating cavity, an eighth fireproof layer is fixedly provided on the right side wall of the third accommodating cavity, and a ninth fireproof layer is fixedly provided on the top side wall of the third accommodating cavity; The seventh fireproof layer, the eighth fireproof layer and the ninth fireproof layer are all made of silicon dioxide material.

5. The lithium battery charging box with thermal runaway prevention and control function and the thermal runaway prevention and control method according to claim 1, characterized in that: A first push-pull protrusion is longitudinally fixedly disposed on the left side wall of the first battery tray, and a first guide slot is longitudinally disposed on the bottom of the left side wall of the first accommodating cavity, and the first push-pull protrusion slides forward and backward in the first guide slot; A second push-pull protrusion is longitudinally fixedly disposed on the right side wall of the first battery tray, a second guide slot is longitudinally disposed on the bottom of the right side wall of the first accommodating cavity, and the second push-pull protrusion slides forward and backward in the second guide slot; The first battery tray is pulled out of or pushed into the first accommodating cavity by the cooperation between the first push-pull protrusion and the first guide slot and the cooperation between the second push-pull protrusion and the second guide slot.

6. The lithium battery charging box with thermal runaway prevention and control function and the thermal runaway prevention and control method according to claim 5, characterized in that: The front side of the first box body is designed to be open, and a first box cover is provided on the front side of the first box body, and the first accommodating cavity is sealed by the first box cover; The side wall of the first box body is composed of three layers of first fire extinguishing panels, a first aerogel layer and a first stainless steel plate from the inside to the outside, and the first box cover is provided with a first transparent window; The first shell of the first fire extinguishing plate is made of paraffin, and the first shell is filled with fire extinguishing material. The first shell of the first fire extinguishing plate melts when encountering the high temperature of flame and releases the fire extinguishing material therein.

7. The lithium battery charging box with thermal runaway prevention and control function and the thermal runaway prevention and control method according to claim 1, characterized in that: A third push-pull protrusion is longitudinally fixedly provided on the left side wall of the second battery tray, and a third guide slot is longitudinally provided on the bottom of the left side wall of the second accommodating cavity, and the third push-pull protrusion slides forward and backward in the third guide slot; A fourth push-pull protrusion is longitudinally fixedly provided on the right side wall of the second battery tray, a fourth guide slot is longitudinally provided on the bottom of the right side wall of the second accommodating cavity, and the fourth push-pull protrusion slides forward and backward in the fourth guide slot; The second battery tray is pulled out of or pushed into the second accommodating cavity by the cooperation between the third push-pull protrusion and the third guide slot and the cooperation between the fourth push-pull protrusion and the fourth guide slot.

8. The lithium battery charging box with thermal runaway prevention and control function and the thermal runaway prevention and control method according to claim 7, characterized in that: The front side of the second box body is designed to be open, and a second box cover is provided on the front side of the second box body, and the second containing cavity is sealed by the second box cover; The side wall of the second box body is composed of three layers of second fire extinguishing panels, a second aerogel layer and a second stainless steel plate from the inside to the outside, and a second transparent window is provided on the second box cover; The second outer shell of the second fire extinguishing plate is made of paraffin and is filled with fire extinguishing material. The second outer shell of the second fire extinguishing plate melts when encountering the high temperature of flame and releases the fire extinguishing material therein.

9. The lithium battery charging box with thermal runaway prevention and control function and the thermal runaway prevention and control method according to claim 1, characterized in that: A fifth push-pull protrusion is fixedly disposed longitudinally on the left side wall of the third battery tray, a fifth guide slot is longitudinally disposed at the bottom of the left side wall of the third accommodating cavity, and the fifth push-pull protrusion slides forward and backward in the fifth guide slot; A sixth push-pull protrusion is longitudinally fixedly disposed on the right side wall of the third battery tray, a sixth guide slot is longitudinally disposed on the bottom of the right side wall of the third accommodating cavity, and the sixth push-pull protrusion slides forward and backward in the sixth guide slot; The third battery tray is pulled out of or pushed into the third accommodating cavity through the cooperation between the fifth push-pull protrusion and the fifth guide slot and the cooperation between the sixth push-pull protrusion and the sixth guide slot.

10. The lithium battery charging box with thermal runaway prevention and control function and the thermal runaway prevention and control method according to claim 9, characterized in that: The front side of the third box body is designed to be open, and a third box cover is provided on the front side of the third box body, and the third containing cavity is sealed by the third box cover; The side wall of the third box body is composed of three layers of third fire extinguishing panels, a third aerogel layer and a third stainless steel plate from the inside to the outside, and the third box cover is provided with a third transparent window; The third outer shell of the third fire extinguishing plate is made of paraffin, and the third outer shell is filled with fire extinguishing material. The third fire extinguishing plate melts when encountering the high temperature of flame and releases the fire extinguishing material.

Images