Lithium ion battery charging box for electric bicycle and thermal runaway prevention and control method thereof

Abstract

The invention relates to a lithium ion battery charging box for an electric bicycle and a thermal runaway prevention and control method thereof.The lithium ion 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 box body, and the first box body is provided with a first containing cavity; a first temperature sensor and a first gas sensor are arranged at the top of the first accommodating cavity; a first early warning fan and a second early warning fan are arranged on the rear side wall of the first box body; the second box body is provided with a second accommodating cavity, a second temperature sensor and a second gas sensor are arranged at the top of the second accommodating cavity, and a first early warning fan and a second early warning fan are arranged on the rear side wall of the second box body; the third box body is provided with a third containing cavity, a third temperature sensor and a third gas sensor are arranged on the top of the third containing cavity, and a first early warning fan and a second early warning fan are arranged on the rear side wall of the third box body. The system has the functions of real-time monitoring, real-time early warning, ventilation cooling, automatic power-off, passive fire extinguishing and resetting.

Description

Technical Field

[0001] The invention relates to a lithium ion battery charging box for an electric bicycle and a thermal runaway prevention and control method thereof. Background Art

[0002] With the development of lithium-ion battery technology, lithium-ion batteries are widely used in electric bicycles. 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 electric bicycles. At present, the battery charging box for two-wheeled electric vehicles is mainly the "Lithium Battery Replacement" of Hangzhou Yugu Technology Co., Ltd. The patent "A Self-service Charging Cabinet for Internet of Things Electric Vehicle Batteries" proposes a self-service charging cabinet for Internet of Things batteries for electric vehicles, which mainly includes a main cabinet box cover, a main cabinet box and a main cabinet base, an extension cabinet and a central control box. However, this patent does not have the function of preventing and controlling safety accidents during battery charging. Once the battery has thermal runaway during the charging process, it will not only affect the normal operation of the electric vehicle, but also cause casualties and property losses. Therefore, it is urgent to design a safe and reliable lithium-ion battery charging box for electric automatic vehicles to meet the needs of lithium-ion battery charging for electric bicycles. Summary of the invention

[0003] In view of the above problems existing in the prior art, the main purpose of the present invention is to provide a lithium-ion battery charging box for an electric bicycle and a thermal runaway prevention and control method thereof.

[0004] The technical solution of the present invention is as follows:

[0005] A lithium-ion battery charging box for an electric bicycle and a thermal runaway prevention and control method thereof, the lithium-ion battery charging box comprising a charging box body, the charging box body comprising a first box body, a second box body, a third box body and a control box body, 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 box body is fixedly arranged on the top of the third box body, wherein:

[0006] The first housing has a first accommodating cavity inside, a first battery tray is drawable at the bottom of the first accommodating cavity through a first connecting assembly, the first battery tray is used to place lithium-ion batteries to be charged, a first temperature sensor and a first gas sensor are fixedly arranged on the top of the first accommodating cavity, and a first warning fan and a second warning fan are arranged on the rear side wall of the first housing;

[0007] The second housing has a second accommodating cavity inside, a second battery tray is drawable at the bottom of the second accommodating cavity through a second connecting assembly, the second battery tray is used to place lithium-ion batteries to be charged, a second temperature sensor and a second gas sensor are fixedly arranged on the top of the second accommodating cavity, and a first warning fan and a second warning fan are arranged on the rear side wall of the second housing;

[0008] The third housing has a third accommodating cavity inside, a third battery tray is drawable at the bottom of the third accommodating cavity through a third connecting assembly, the third battery tray is used to place lithium-ion batteries to be charged, a third temperature sensor and a third gas sensor are fixedly arranged on the top of the third accommodating cavity, and a first warning fan and a second warning fan are arranged on the rear side wall of the third housing;

[0009] The control box comprises a control housing, a control circuit board is fixedly arranged inside the control housing, the first temperature sensor, the first gas sensor, the second temperature sensor, the second gas sensor, the third temperature sensor and the third gas sensor are electrically connected to the control circuit board respectively, and a touch screen is arranged on the front side of the control housing, and the touch screen is electrically connected to the control circuit board;

[0010] The control box 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 lithium-ion battery starts to charge, the first warning fan and the second warning fan are not turned on;

[0011] The prevention and control method is: when the monitoring data of any sensor monitoring gas concentration or temperature among the first temperature sensor, the first gas sensor, the second temperature sensor, the second gas sensor, the third temperature sensor, and the third gas sensor reaches the first-level warning threshold, a first-level warning signal is issued and a first-level warning alarm is performed, and the corresponding first warning fan is automatically turned on at the same time; when the monitoring data is less than the first-level warning threshold, the first-level warning is automatically lifted;

[0012] When the monitoring data of any sensor monitoring gas concentration or temperature among the first temperature sensor, the first gas sensor, the second temperature sensor, the second gas sensor, the third temperature sensor, and the third gas sensor reaches the second-level warning threshold, a second-level warning signal is issued and a second-level warning alarm is performed, and all first warning fans and second warning fans are automatically turned on, and all charging power supplies are automatically powered off;

[0013] When the monitoring data is less than the secondary warning threshold, the secondary warning is automatically lifted; when a false alarm occurs, a manual reset is performed by clicking the reset button on the touch screen to restore power to all charging power sources; when the monitoring data exceeds the secondary warning value, manual reset is invalid, the charging power source is still powered off, all primary warning fans and secondary warning fans rotate at the same time, and a secondary warning signal is issued and a secondary warning alarm is performed until the gas concentration and temperature drop to the normal threshold, all primary warning fans and secondary warnings are turned off, and the secondary warning signal is lifted, and all charging power sources are automatically powered.

[0014] The first connecting assembly includes a bottom support plate, a left pulley assembly and a right pulley assembly, wherein the bottom support plate is fixedly disposed laterally at the front end of the bottom side wall of the first accommodating cavity inside the first box body, wherein:

[0015] The left pulley block is fixedly arranged on the left side of the bottom side wall of the first accommodating cavity inside the first box body, and the right pulley block is fixedly arranged on the right side of the bottom side wall of the first accommodating cavity inside the first box body;

[0016] The first battery tray is located between the left pulley assembly and the right pulley assembly. The left side wall of the first battery tray is concavely formed with a first connecting groove along the longitudinal direction, and the right side wall of the first battery tray is concavely formed with a second connecting groove along the longitudinal direction.

[0017] The left pulley assembly comprises a left fixing frame and a plurality of left pulleys arranged in the left fixing frame, wherein the left fixing frame is fixedly arranged on the left side of the bottom side wall of the first accommodating cavity along the longitudinal direction, and a plurality of first mounting cavities are arranged on the left fixing frame along the longitudinal direction, and a left pulley is installed in each of the first mounting cavities, and the plurality of left pulleys are slidably connected in the first connecting slide groove;

[0018] The right pulley assembly includes a right fixing frame and a plurality of right pulleys arranged in the right fixing frame, the right fixing frame is fixedly arranged on the right side of the bottom side wall of the first accommodating cavity along the longitudinal direction, a plurality of second installation cavities are arranged on the right fixing frame along the longitudinal direction, a right pulley is installed in each of the second installation cavities, and the plurality of right pulleys are slidably connected in the second connecting groove.

[0019] The first connection assembly further comprises a first longitudinal pulley block and a second longitudinal pulley block, wherein:

[0020] The first longitudinal pulley block is arranged on the left side of the bottom side wall of the first accommodating cavity and is located on the right side of the left pulley assembly, and the first longitudinal pulley block includes a plurality of first pulleys arranged longitudinally, and a first connecting shaft is fixedly arranged in the first pulley;

[0021] The second longitudinal pulley block is arranged on the right side of the bottom side wall of the first accommodating cavity and is located on the left side of the right pulley assembly. The second longitudinal pulley block includes a plurality of second pulleys arranged longitudinally, and a second connecting shaft is fixedly arranged in the second pulley.

[0022] A first positioning slot and a second positioning slot are longitudinally arranged on the bottom lower surface of the first battery tray, the first pulley is slidably connected to the first positioning slot, and the second pulley is slidably connected to the second positioning slot.

[0023] A first fixing groove is longitudinally arranged on the left side of the bottom side wall of the first accommodating cavity, the first pulley is slidably arranged in the first fixing groove, a first connecting hole is arranged on the left side wall of the first fixing groove, and a second connecting hole is arranged on the right side wall of the first fixing groove, and both ends of the first connecting shaft are respectively installed in the first connecting hole and the second connecting hole;

[0024] A second fixing groove is longitudinally arranged on the right side of the bottom side wall of the first accommodating cavity, the second pulley is slidably arranged in the second fixing groove, a third connecting hole is arranged on the left side wall of the second fixing groove, and a fourth connecting hole is arranged on the right side wall of the second fixing groove, and both ends of the second connecting shaft are respectively installed in the third connecting hole and the fourth connecting hole.

[0025] The left and right sides of the top side walls of the first accommodating cavity are respectively extended downward to fix a first fixing plate and a second fixing plate, the right side wall of the first fixing plate is concave to form a first connecting slide groove, the left side wall of the second fixing plate is concave to form a second connecting slide groove, a first push-pull plate is arranged above the first accommodating cavity, the left end of the first push-pull plate is arranged in the first connecting slide groove, the right end of the first push-pull plate is arranged in the second connecting slide groove, and the first push-pull plate is pushed and pulled and slides forward and backward along the first connecting slide groove and the second connecting slide groove;

[0026] A first accommodating space is provided inside the first push-pull plate, and the first accommodating space is filled with a fire extinguishing agent. A plurality of first through holes are provided on the lower side wall of the first push-pull plate, and the first through holes are connected with the first accommodating space. A sealant is filled in the first through holes, and when the sealant encounters the flame of the burning lithium-ion battery on the first battery tray, it melts, and the first push-pull plate releases the fire extinguishing agent therein to extinguish the burning lithium-ion battery.

[0027] A third fixing plate and a fourth fixing plate are respectively extended downward and fixedly arranged on the left and right sides of the top side wall of the second accommodating cavity, the right side wall of the third fixing plate is concave to form a third connecting slide groove, the left side wall of the fourth fixing plate is concave to form a fourth connecting slide groove, a second push-pull plate is arranged above the second accommodating cavity, the left end of the second push-pull plate is arranged in the third connecting slide groove, the right end of the second push-pull plate is arranged in the fourth connecting slide groove, and the second push-pull plate pushes and slides forward and backward along the third connecting slide groove and the fourth connecting slide groove;

[0028] A second accommodating space is provided inside the second sliding plate, and the second accommodating space is filled with a fire extinguishing agent. A plurality of second through holes are provided on the lower side wall of the second sliding plate, and the second through holes are connected with the second accommodating space. The second through holes are filled with a sealant, and when the sealant encounters the flame of the burning lithium-ion battery on the second battery tray, it melts, and the second sliding plate releases the fire extinguishing agent therein to extinguish the burning lithium-ion battery.

[0029] A fifth fixing plate and a sixth fixing plate are respectively extended downward and fixedly arranged on the left and right sides of the top side wall of the third accommodating cavity, the right side wall of the fifth fixing plate is concave to form a fifth connecting slide groove, the left side wall of the sixth fixing plate is concave to form a sixth connecting slide groove, a third push-pull plate is arranged above the third accommodating cavity, the left end of the third push-pull plate is arranged in the fifth connecting slide groove, the right end of the third push-pull plate is arranged in the sixth connecting slide groove, and the third push-pull plate can be pushed and slid forward and backward along the fifth connecting slide groove and the sixth connecting slide groove;

[0030] A third accommodating space is provided inside the third sliding plate, and the third accommodating space is filled with a fire extinguishing agent. A plurality of third through holes are provided on the lower side wall of the third sliding plate, and the third through holes are communicated with the third accommodating space. The third through holes are filled with a sealant, and when the sealant encounters the flame of the burning lithium-ion battery on the third battery tray, it melts, and the third sliding plate releases the fire extinguishing agent therein to extinguish the burning lithium-ion battery.

[0031] When the fire extinguishing agent is composed of one of hydrogel, water or AVD fire extinguishing agent, the sealant is composed of paraffin;

[0032] When the fire extinguishing agent is composed of one or more of silicon dioxide, ammonium dihydrogen phosphate, sodium bicarbonate or silicate, the sealant is composed of one or more of polypropylene, polyester or polyurethane.

[0033] The left and right walls of the first box body are both provided with a first air inlet, the front side of the first box body is designed to be open, the front side of the first box body is provided with a first box cover, the first containing cavity is closed by the first box cover, and the side walls of the first box body are sequentially composed of a first carbon steel plate, a first aerogel layer or a first heat insulation cotton and a first stainless steel plate from the outside to the inside;

[0034] The left and right walls of the second box body are both provided with a second air inlet, the front side of the second box body is designed to be open, and the front side of the second box body is provided with a second box cover, and the second accommodating cavity is closed by the second box cover, and the side walls of the second box body are sequentially composed of a second carbon steel plate, a second aerogel layer or a second heat insulation cotton, and a second stainless steel plate from the outside to the inside;

[0035] The left and right walls of the third box body are both provided with a third air inlet, the front side of the third box body is designed to be open, and the front side of the third box body is provided with a third box cover, and the third containing cavity is closed by the third box cover, and the side walls of the third box body are composed of a third carbon steel plate, a third aerogel layer or a third thermal insulation cotton and a third stainless steel plate from the outside to the inside.

[0036] The present invention has the following advantages and beneficial effects: a lithium-ion battery charging box for an electric bicycle and a thermal runaway prevention and control method thereof provided in an embodiment of the present invention have 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 lithium-ion 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 temperature sensor, the first gas sensor, the second temperature sensor, the second gas sensor, the third temperature sensor and the third gas sensor reaches the first-level warning threshold, a first-level warning signal is issued and a first-level warning alarm is performed, and the corresponding first warning fan is automatically turned on; when the monitoring data of any one of the first temperature sensor, the first gas sensor, the second temperature sensor, the second gas sensor, the third temperature sensor and the third gas sensor reaches the second-level warning threshold, a second-level warning signal is issued and a second-level warning alarm is performed, and all the first warning fans and the second warning fans are automatically turned on, and all charging power supplies are automatically powered off, thereby achieving the purpose of linkage warning. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of the three-dimensional structure of a lithium-ion battery charging box for an electric bicycle provided in an embodiment of the present invention.

[0038] Figure 2 A schematic diagram of the three-dimensional structure of a lithium-ion battery charging box for an electric bicycle provided in an embodiment of the present invention after removing the first battery tray, the second battery tray and the third battery tray.

[0039] Figure 3 A schematic diagram of a three-dimensional structure of a first box body, a second box body, a third box body and a controller that cooperate with each other provided in an embodiment of the present invention.

[0040] Figure 4 A schematic diagram of a three-dimensional structure in which a first battery tray, a second battery tray and a third battery tray cooperate with a first box body, a second box body and a third box body provided in an embodiment of the present invention.

[0041] Figure 5 A schematic diagram of the main structure of the first warning fan, the second warning fan, the first temperature sensor, the first gas sensor, the second temperature sensor, the second gas sensor, the third temperature sensor and the third gas sensor provided in an embodiment of the present invention.

[0042] Figure 6 This is a schematic diagram of the enlarged structure in one direction of the first box provided by an embodiment of the present invention after the first battery tray is removed.

[0043] Figure 7 This is a schematic diagram of the enlarged structure of the first box provided by an embodiment of the present invention with the first battery tray removed from another direction.

[0044] Figure 8 A schematic diagram of a three-dimensional structure in which a first accommodating cavity, a first connecting hole, a third connecting hole and a second fixing groove cooperate with each other in an embodiment of the present invention.

[0045] Fig. 9 A schematic diagram of a three-dimensional structure in which a first accommodating cavity, a second connecting hole, a fourth connecting hole and a first fixing groove cooperate with each other in an embodiment of the present invention.

[0046] Fig.10 An enlarged three-dimensional structural schematic diagram of a left pulley assembly provided in an embodiment of the present invention.

[0047] Fig.11 An enlarged three-dimensional structural schematic diagram of the right pulley assembly provided in an embodiment of the present invention.

[0048] Fig.12 This is a schematic diagram of an enlarged three-dimensional structure of a first battery tray in one direction provided by an embodiment of the present invention.

[0049] Fig.13 This is a schematic diagram of an enlarged three-dimensional structure of the first battery tray provided by an embodiment of the present invention in another direction.

[0050] Fig.14 An enlarged bottom view of the structure of a first battery tray provided in an embodiment of the present invention.

[0051] Fig.15A schematic diagram of a three-dimensional structure in which a first connecting slide groove, a second connecting slide groove and a first accommodating cavity cooperate with each other according to an embodiment of the present invention.

[0052] Fig.16 A schematic cross-sectional structural diagram of a first push-pull plate provided in an embodiment of the present invention.

[0053] Fig.17 A schematic diagram of a three-dimensional structure in which a third connecting slot, a fourth connecting slot and a second accommodating cavity cooperate with each other in an embodiment of the present invention.

[0054] Fig.18 This is a schematic cross-sectional structural diagram of a second push-pull plate provided in an embodiment of the present invention.

[0055] Fig.19 A schematic diagram of a three-dimensional structure in which a fifth connecting slot, a sixth connecting slot and a third accommodating cavity cooperate with each other according to an embodiment of the present invention.

[0056] Fig. 20 This is a schematic cross-sectional structural diagram of a third push-pull plate provided in an embodiment of the present invention.

[0057] Fig.21 A schematic diagram of the front structure of the first push-pull plate and the first box, the second push-pull plate and the second box, and the third push-pull plate and the third box provided in an embodiment of the present invention.

[0058] Fig. 22 A schematic diagram of content displayed on a touch screen provided by an embodiment of the present invention.

[0059] Fig.23 This is a functional block diagram of a lithium-ion battery charging box for an electric bicycle provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0060] 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.

[0061] 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.

[0062] 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.

[0063] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0064] like Figures 1 to 23 As shown: An embodiment of the present invention provides a lithium-ion battery charging box for an electric bicycle and a thermal runaway prevention and control method thereof, wherein the lithium-ion battery charging box comprises a charging box body 100, wherein the charging box body 100 comprises a first box body 110, a second box body 120, a third box body 130 and a control box body 140, wherein 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 box body 140 is fixedly arranged on the top of the third box body 130, wherein:

[0065] The first housing 110 has a first accommodating cavity 111 inside, and a first battery tray 112 is provided at the bottom of the first accommodating cavity 111 through a first connecting assembly, and the first battery tray 112 is used to place the lithium-ion battery 200 to be charged, and a first temperature sensor 113 and a first gas sensor 114 are fixedly provided at the top of the first accommodating cavity 111, and a first warning fan 151 and a second warning fan 152 are provided on the rear side wall of the first housing;

[0066] The second housing 120 has a second accommodating cavity 121 inside, and a second battery tray 122 is provided at the bottom of the second accommodating cavity 121 through a second connecting assembly, and the second battery tray 122 is used to place the lithium-ion battery 200 to be charged, and a second temperature sensor 123 and a second gas sensor 124 are fixedly provided at the top of the second accommodating cavity 121, and a first warning fan 151 and a second warning fan 152 are provided on the rear side wall of the second housing 120;

[0067] The third housing 130 has a third accommodating cavity 131 inside, and a third battery tray 132 is provided at the bottom of the third accommodating cavity 131 through a third connecting assembly, and the third battery tray 132 is used to place the lithium-ion battery 200 to be charged, and a third temperature sensor 133 and a third gas sensor 134 are fixedly provided at the top of the third accommodating cavity 131, and a first warning fan 151 and a second warning fan 152 are provided on the rear side wall of the third housing 130;

[0068] The control box 140 includes a control housing 141, a control circuit board (not shown) is fixedly arranged inside the control housing 141, the first temperature sensor 113, the first gas sensor 114, the second temperature sensor 123, the second gas sensor 124, the third temperature sensor 133 and the third gas sensor 134 are electrically connected to the control circuit board respectively, and a touch screen 142 is arranged on the front side of the control housing 141, and the touch screen 142 is electrically connected to the control circuit board;

[0069] The control box 141 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 142. When the lithium-ion battery 200 starts to charge, the first warning fan 151 and the second warning fan 152 are not turned on;

[0070] The thermal runaway prevention and control method is as follows: when the monitoring data of any sensor monitoring gas concentration or temperature among the first temperature sensor 113, the first gas sensor 114, the second temperature sensor 123, the second gas sensor 124, the third temperature sensor 133 and the third gas sensor 134 reaches the first-level warning threshold, a first-level warning signal is issued and a first-level warning alarm is performed, and the corresponding first warning fan is automatically turned on at the same time, and the first-level warning alarm is automatically released when the monitoring data is less than the first-level warning threshold;

[0071] When the monitoring data of any sensor monitoring gas concentration or temperature among the first temperature sensor 113, the first gas sensor 114, the second temperature sensor 123, the second gas sensor 124, the third temperature sensor 133 and the third gas sensor 134 reaches the second-level warning threshold, a second-level warning signal is issued and a second-level warning alarm is performed, and all first warning fans 151 and second warning fans 152 are automatically turned on, and all charging power supplies are automatically powered off;

[0072] When the monitoring data is less than the secondary warning threshold, the secondary warning is automatically lifted; when a false alarm occurs, a manual reset is performed by clicking the reset button on the touch screen 142 to restore the power supply of all charging power sources; when the monitoring data exceeds the secondary warning value, the manual reset is invalid, the charging power source is still powered off, all the first-level warning fans 151 and the second-level warning fans 152 rotate at the same time, and a second-level warning signal is issued and a second-level warning alarm is performed until the gas concentration and temperature drop to the normal threshold, all the first-level warning fans and the second-level warnings are turned off, and the second-level warning signal is lifted, and all charging power sources are automatically powered.

[0073] The first connecting assembly includes a bottom support plate 160, a left pulley assembly and a right pulley assembly, wherein the bottom support plate 160 is fixedly disposed at the front end of the bottom side wall of the first accommodating cavity 111 inside the first box body 110 in a transverse direction, wherein:

[0074] The left pulley block is fixedly arranged on the left side of the bottom side wall of the first accommodating cavity 111 inside the first box body 110, and the right pulley block is fixedly arranged on the right side of the bottom side wall of the first accommodating cavity 111 inside the first box body 110;

[0075] The first battery tray 112 is located between the left pulley assembly and the right pulley assembly. The left side wall of the first battery tray 112 is concave in the longitudinal direction to form a first connecting groove 171, and the right side wall of the first battery tray 112 is concave in the longitudinal direction to form a second connecting groove 172. At the same time, the first battery tray 112 is composed of a fourth stainless steel plate and a first silicon dioxide layer or a fourth heat insulation cotton from top to bottom. In addition, the structures of the second battery tray and the third battery tray are the same as that of the first battery tray.

[0076] The left pulley assembly includes a left fixing frame 180 and a plurality of left pulleys 182 arranged in the left fixing frame 180. The left fixing frame 180 is fixedly arranged on the left side of the bottom side wall of the first accommodating cavity 111 along the longitudinal direction. A plurality of first installation cavities 181 are arranged on the left fixing frame 180 along the longitudinal direction. A left pulley 182 is installed in each of the first installation cavities 181. The plurality of left pulleys 182 are slidably connected to the first connecting groove 171.

[0077] The right pulley assembly includes a right fixing frame 190 and a plurality of right pulleys 192 arranged in the right fixing frame 190. The right fixing frame 190 is fixedly arranged on the right side of the bottom side wall of the first accommodating cavity 111 along the longitudinal direction. A plurality of second mounting cavities 191 are longitudinally arranged on the right fixing frame 190. A right pulley 192 is installed in each of the second mounting cavities 191. The plurality of right pulleys 192 are all slidably connected in the second connecting groove 172.

[0078] The first gas sensor 114, the second gas sensor 124, and the third gas sensor 134 are all H2 sensors, which first detect H2 in the early stage of thermal runaway of the lithium-ion battery. Compared with other warning gases such as CO and CO2, the H2 sensor greatly advances the time of lithium-ion battery overcharge thermal runaway warning.

[0079] The first connection assembly further comprises a first longitudinal pulley block and a second longitudinal pulley block, wherein:

[0080] The first longitudinal pulley block is arranged on the left side of the bottom side wall of the first accommodating cavity 111 and on the right side of the left pulley assembly. The first longitudinal pulley block includes a plurality of first pulleys 166 arranged longitudinally. A first connecting shaft (not shown in the figure) is fixedly arranged in the first pulley 166.

[0081] The second longitudinal pulley group is arranged on the right side of the bottom side wall of the first accommodating cavity 111 and on the left side of the right pulley assembly. The second longitudinal pulley group includes a plurality of longitudinally arranged second pulleys 168, and a second connecting shaft (not shown in the figure) is fixedly arranged in the second pulley 168.

[0082] A first positioning slot 115 and a second positioning slot 116 are longitudinally provided on the bottom lower surface of the first battery tray 112 . The first pulley 166 is slidably connected to the first positioning slot 115 , and the second pulley 168 is slidably connected to the second positioning slot 116 .

[0083] A first fixing groove 117 is longitudinally arranged on the left side of the bottom side wall of the first accommodating cavity 111, and the first pulley 166 is slidably arranged in the first fixing groove 117. A first connecting hole 118 is arranged on the left side wall of the first fixing groove 117, and a second connecting hole 119 is arranged on the right side wall of the first fixing groove 117. Both ends of the first connecting shaft are respectively installed in the first connecting hole 118 and the second connecting hole 119.

[0084] A second fixing groove 125 is longitudinally arranged on the right side of the bottom side wall of the first accommodating cavity 111, and the second pulley 192 is slidably arranged in the second fixing groove 125. A third connecting hole 126 is arranged on the left side wall of the second fixing groove 125, and a fourth connecting hole 127 is arranged on the right side wall of the second fixing groove 125. Both ends of the second connecting shaft 194 are respectively installed in the third connecting hole 126 and the fourth connecting hole 127.

[0085] A first fixing plate 1111 and a second fixing plate 1112 are respectively extended downward and fixedly arranged on the left and right sides of the top side wall of the first accommodating cavity 111, a first connecting groove 1113 is formed in the right side wall of the first fixing plate 1111, a second connecting groove 1114 is formed in the left side wall of the second fixing plate 1112, a first push-pull plate 1115 is arranged above the first accommodating cavity 111, a left end of the first push-pull plate 165 is arranged in the first connecting groove 1113, and a right end of the first push-pull plate 165 is arranged in the second connecting groove 1114. 114, the first push-pull plate 1115 can be pushed and slid forward and backward along the first connecting slot 1113 and the second connecting slot 1114; at the same time, a first accommodating space 1116 is provided inside the first push-pull plate 1115, and the first accommodating space 1116 is filled with a fire extinguishing agent, and a plurality of first through holes 1117 are provided on the lower side wall of the first push-pull plate 1115, the first through holes 1117 are connected to the first accommodating space 1116, and the first through holes 1117 are filled with sealants, that is, the first through holes 1117 are sealed by the sealants. When the sealants encounter the flames of the burning lithium-ion batteries on the first battery tray 112, they burn and melt, and the first push-pull plate 1115 releases the fire extinguishing agent therein to extinguish the burning lithium-ion batteries.

[0086] A third fixing plate 1211 and a fourth fixing plate 1212 are respectively extended downward and fixedly arranged on the left and right sides of the top side walls of the second accommodating cavity 121, the right side wall of the third fixing plate 1211 is concavely formed with a third connecting groove 1213, the left side wall of the fourth fixing plate 1212 is concavely formed with a fourth connecting groove 1214, a second push-pull plate 1215 is arranged above the second accommodating cavity 121, the left end of the second push-pull plate 1215 is arranged in the third connecting groove 1213, and the right end of the second push-pull plate 1215 is arranged in the fourth connecting groove 1214, the second push-pull plate 1215 can be pushed and slid forward and backward along the third connecting slot 1213 and the fourth connecting slot 1214; at the same time, a second accommodating space 1216 is provided inside the second push-pull plate 1215, the first accommodating space 1216 is filled with a fire extinguishing agent, and a plurality of first through holes 1217 are provided on the lower side wall of the first push-pull plate 1215, the first through holes 1217 are connected to the first accommodating space 1216, and the first through holes 1217 are filled with sealants, that is, the second through holes 1217 are sealed by the sealants. When the sealants encounter the flames of the burning lithium-ion batteries on the second battery tray, they burn and melt, and the second push-pull plate 1215 releases the fire extinguishing agent therein to extinguish the burning lithium-ion batteries.

[0087] A fifth fixing plate 1311 and a sixth fixing plate 1312 are respectively extended downward and fixedly arranged on the left and right sides of the top side wall of the third accommodating cavity 131, the right side wall of the fifth fixing plate 1311 is concavely formed with a fifth connecting groove 1313, the left side wall of the sixth fixing plate 1312 is concavely formed with a sixth connecting groove 1314, a third push-pull plate 1315 is arranged above the third accommodating cavity 131, the left end of the third push-pull plate 1315 is arranged in the fifth connecting groove 1313, and the right end of the third push-pull plate 165 is arranged in the sixth connecting groove 1314. 314, the third push-pull plate 1315 can be pushed and slid forward and backward along the fifth connecting groove 1313 and the sixth connecting groove 1314; at the same time, a third accommodating space 1316 is arranged inside the third push-pull plate 1315, and the third accommodating space 1316 is filled with a fire extinguishing agent, and a plurality of third through holes 1317 are arranged on the lower side wall of the third push-pull plate 1315, and the third through holes 1317 are connected with the third accommodating space 1316, and the third through holes 1317 are filled with sealants, that is, the third through holes 1317 are sealed by the sealants.

[0088] When the fire extinguishing agent is composed of one of hydrogel, water or AVD fire extinguishing agent, the sealant is composed of paraffin; when the fire extinguishing agent is composed of one or more of silicon dioxide or ammonium dihydrogen phosphate or sodium bicarbonate or silicate, the sealant is composed of one or more of polypropylene (PP), polyester (PET) and polyurethane (PU). For example, when the sealant encounters the flame of the burning lithium-ion battery on the third battery tray, it burns and melts, and the third push-pull plate 1315 releases the fire extinguishing agent therein to extinguish the burning lithium-ion battery. That is, the sealant can burn or melt when it encounters fire, and the purpose is to allow the fire extinguishing agent in the above-mentioned push-pull plate (that is, the first push-pull plate 1115, the second push-pull plate 1215 or the third push-pull plate 1315) to be released outward through the corresponding through hole (that is, the first through hole 1117, the second through hole 1217 or the third through hole 1317) to extinguish the burning lithium-ion battery.

[0089] The front side of the first box body 110 is designed to be open, and a first box cover 135 is provided on the front side of the first box body 110, and the first accommodating cavity 111 is closed by the first box cover 135; the side walls of the first box body 110 are composed of a first carbon steel plate, a first aerogel layer or a first thermal insulation cotton and a first stainless steel plate from the outside to the inside, wherein the thickness of the first stainless steel plate is 1 mm, the thickness of the first aerogel layer or the first thermal insulation cotton is 5 mm, and the thickness of the first carbon steel plate is 1 mm; the side walls of the first box cover 135 are also composed of a first carbon steel plate, a first aerogel layer or a first thermal insulation cotton and a first stainless steel plate from the outside to the inside, and a first transparent window 145 is provided on the first box cover 135, and the first transparent window 145 is composed of explosion-proof glass, thereby improving safety and reliability.

[0090] At the same time, the left and right walls of the first box 110 are both provided with first air inlets 153. By providing the first air inlets 153 on the left and right walls of the first box 110, the speed of air intake can be increased, thereby improving the cooling effect of the first box 110. The outer wall of the first box 110 is located outside the first air inlet 153 and is fixedly provided with a first protective net. By providing the first protective net, the first air inlet 153 can be safely protected, and the safety and reliability are improved. In addition, a first charging socket 108 is provided on the rear side wall of the first accommodating cavity 111 of the first box body 110. When the first box body 110 is used to charge the lithium-ion battery, the first box cover 135 is opened, the first battery tray 112 is pulled out, the lithium-ion battery to be charged is placed on the first battery tray 112, and then the first battery tray 112 is pushed into the first accommodating cavity 111 of the first box body 110. At the same time, the charging port on the lithium-ion battery on the first battery tray 112 cooperates with the first charging socket 108 for charging.

[0091] The front side of the second box body 120 is designed to be open, and a second box cover 136 is provided on the front side of the second box body 120, and the second containing cavity is closed by the second box cover 136; the side walls of the second box body 120 are composed of a second carbon steel plate, a second aerogel layer or a second thermal insulation cotton and a second stainless steel plate from the outside to the inside, wherein the thickness of the second stainless steel plate is 1 mm, the thickness of the second aerogel layer or the second thermal insulation cotton is 5 mm, and the thickness of the second carbon steel plate is 1 mm; the side walls of the second box cover 127 are also composed of a second carbon steel plate, a second aerogel layer or a second thermal insulation cotton and a second stainless steel plate from the outside to the inside, and a second transparent window 146 is provided on the second box cover 136, and the second transparent window 146 is composed of explosion-proof glass, thereby improving safety and reliability.

[0092] At the same time, the left side wall and the right side wall of the second box body 120 are both provided with a second air inlet 154. By providing the second air inlet 154 on the left side wall and the right side wall of the second box body 120, the speed of the incoming air can be increased, thereby improving the cooling effect of the second box body 120; at the same time, the outer side wall of the second box body 120 is located on the outside of the second air inlet 154 and is fixedly provided with a second protective net. By providing the second protective net, the second air inlet 153 can be safely protected, and the safety and reliability are improved. In addition, a second charging socket 128 is provided on the rear side wall of the second accommodating cavity 121 of the second box body 120. When the second box body 120 is used to charge the lithium-ion battery, the second box cover 136 is opened, the second battery tray 122 is pulled out, the lithium-ion battery to be charged is placed on the second battery tray 122, and then the second battery tray 122 is pushed into the second accommodating cavity 121 of the second box body 120. At the same time, the charging port on the lithium-ion battery on the second battery tray 122 cooperates with the second charging socket 128 for charging.

[0093] When the fire extinguishing agent is composed of one of hydrogel, water or AVD fire extinguishing agent, the sealant is composed of paraffin; when the fire extinguishing agent is composed of one or more of silicon dioxide, diammonium dihydrogen phosphate, sodium bicarbonate or silicate, the sealant is composed of one or more of polypropylene, polyester or polyurethane.

[0094] The front side of the third box body 130 is designed to be open, and a third box cover 137 is provided on the front side of the third box body 130, through which the third containing cavity is closed; the side walls of the third box body 130 are composed of a third carbon steel plate, a third aerogel layer or a third thermal insulation cotton and a third stainless steel plate from the outside to the inside, wherein the thickness of the third stainless steel plate is 1 mm, the thickness of the third aerogel layer or the third thermal insulation cotton is 5 mm, and the thickness of the third carbon steel plate is 1 mm; the side walls of the third box cover 137 are also composed of a third carbon steel plate, a third aerogel layer or a third thermal insulation cotton and a third stainless steel plate from the outside to the inside, and a third transparent window 147 is provided on the third box cover 137, and the third transparent window 147 is composed of explosion-proof glass, thereby improving safety and reliability.

[0095] At the same time, the left side wall and the right side wall of the third box body 130 are both provided with a third air inlet 155. By providing the third air inlet 155 on the left side wall and the right side wall of the third box body 130, the speed of the incoming air can be increased, thereby improving the cooling effect of the third box body 130; at the same time, the outer wall of the third box body 130 is located on the outside of the third air inlet 155 and is fixedly provided with a third protective net (not shown in the figure). By providing the third protective net, the third air inlet 155 can be safely protected, and the safety and reliability are improved. In addition, a third charging socket 138 is provided on the rear side wall of the third accommodating cavity 131 on the third box body 130. When the third box body 130 is used to charge the lithium-ion battery, the third box cover 137 is opened, the third battery tray 132 is pulled out, and the lithium-ion battery to be charged is placed on the third battery tray 132, and then the third battery tray 132 is pushed into the third accommodating cavity 131 of the third box body 130. At the same time, the charging port on the lithium-ion battery on the third battery tray 132 cooperates with the third charging socket 138 for charging.

[0096] A lithium-ion battery charging box for an electric bicycle provided in an embodiment of the present invention has a thermal runaway prevention and control method or working principle as follows: a first warning threshold and a second warning threshold are set by manually operating a touch screen on a control box 140; when a lithium-ion battery 200 is charged in a corresponding charging box in a charging box body 100, namely, a first box 110, a second box 120, or a third box 130, the first warning fan 151 and the second warning fan 152 are not turned on, and the touch screen 142 can display the charging current, charging voltage, and charging power of the lithium-ion battery in real time; the charging rate of each charging box can also be set through the touch screen 142, namely, fast charging or slow charging; in addition, the touch screen 142 can be used to perform fingerprint or password to turn the machine on and off;

[0097] When the lithium-ion battery 200 in the first box 110 is in the process of charging, the first temperature sensor 113 and the first gas sensor 114 are activated and monitor the temperature and gas concentration in the first box 110 in real time;

[0098] When the lithium-ion battery 200 in the second box 120 is in the charging process, the second temperature sensor 123 and the second gas sensor 124 are activated and monitor the temperature and gas concentration in the second box 120 in real time;

[0099] When the lithium-ion battery 200 in the third box 130 is in the process of charging, the third temperature sensor 133 and the third gas sensor 3 are activated and monitor the temperature and gas concentration in the third box 130 in real time;

[0100] When the monitoring data of any sensor for monitoring gas concentration or temperature among the first temperature sensor 113, the first gas sensor 114, the second temperature sensor 123, the second gas sensor 124, the third temperature sensor 133 and the third gas sensor 134 reaches the first-level warning threshold, a first-level warning signal is issued and a first-level warning alarm is performed, and the corresponding first warning fan 151 is automatically turned on to cool the temperature in the corresponding box. When the monitoring data is less than the first-level warning threshold, the first-level warning is automatically lifted;

[0101] When the monitoring data of any sensor monitoring gas concentration or temperature among the first temperature sensor 113, the first gas sensor 114, the second temperature sensor 123, the second gas sensor 124, the third temperature sensor 133 and the third gas sensor 134 reaches the second-level warning threshold, a second-level warning signal is issued and a second-level warning alarm is performed, and all first warning fans 151 and second warning fans 152 are automatically turned on, and all charging power supplies are automatically powered off;

[0102] When the lithium-ion battery 200 in the first box body 110, the second box body 120, or the third box body 130 catches fire due to thermal runaway combustion during charging, the sealant filled in the first through hole 1117 on the lower surface of the first push-pull plate 1115, the second through hole 1217 on the lower surface of the second push-pull plate 1215, or the third through hole 1317 on the lower surface of the third push-pull plate 1315 burns or melts, and the first push-pull plate 1115, the second push-pull plate 1215, or the third push-pull plate 1315 releases the fire extinguishing agent therein to extinguish the burning lithium-ion battery 200;

[0103] When the monitoring data is less than the secondary warning threshold, the secondary warning alarm is automatically lifted; when a false alarm occurs, a manual reset is performed by clicking the reset button on the touch screen 142 to restore the power supply of all charging power sources; when the monitoring data exceeds the secondary warning value, the manual reset is invalid, the charging power source is still powered off, all the first-level warning fans 151 and the second-level warning fans 152 rotate at the same time, a second-level warning signal is issued and a second-level warning alarm is performed until the gas concentration and temperature are reduced to the normal threshold, all the first-level warning fans and the second-level warning fans are turned off, and the second-level warning alarm is lifted, and all charging power sources are automatically powered.

[0104] 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-ion battery charging box for an electric bicycle and a thermal runaway prevention and control method thereof, characterized in that: The lithium-ion battery charging box includes a charging box body, which includes a first box body, a second box body, a third box body and a control box body, wherein 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 box body 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 drawable at the bottom of the first accommodating cavity through a first connecting assembly, the first battery tray is used to place lithium-ion batteries to be charged, a first temperature sensor and a first gas sensor are fixedly arranged on the top of the first accommodating cavity, and a first warning fan and a second warning fan are arranged on the rear side wall of the first housing; The second housing has a second accommodating cavity inside, a second battery tray is drawable at the bottom of the second accommodating cavity through a second connecting assembly, the second battery tray is used to place lithium-ion batteries to be charged, a second temperature sensor and a second gas sensor are fixedly arranged on the top of the second accommodating cavity, and a first warning fan and a second warning fan are arranged on the rear side wall of the second housing; The third housing has a third accommodating cavity inside, a third battery tray is drawable at the bottom of the third accommodating cavity through a third connecting assembly, the third battery tray is used to place lithium-ion batteries to be charged, a third temperature sensor and a third gas sensor are fixedly arranged on the top of the third accommodating cavity, and a first warning fan and a second warning fan are arranged on the rear side wall of the third housing; The control box comprises a control housing, a control circuit board is fixedly arranged inside the control housing, the first temperature sensor, the first gas sensor, the second temperature sensor, the second gas sensor, the third temperature sensor and the third gas sensor are electrically connected to the control circuit board respectively, and a touch screen is arranged on the front side of the control housing, and the touch screen is electrically connected to the control circuit board; The control box 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 lithium-ion battery starts to charge, the first warning fan and the second warning fan are not turned on; The thermal runaway prevention and control method is: when the monitoring data of any sensor monitoring gas concentration or temperature among the first temperature sensor, the first gas sensor, the second temperature sensor, the second gas sensor, the third temperature sensor, and the third gas sensor reaches the first-level warning threshold, a first-level warning signal is issued and a first-level warning alarm is performed, and the corresponding first warning fan is automatically turned on at the same time, and the first-level warning is automatically lifted when the monitoring data is less than the first-level warning threshold; When the monitoring data of any sensor monitoring gas concentration or temperature among the first temperature sensor, the first gas sensor, the second temperature sensor, the second gas sensor, the third temperature sensor, and the third gas sensor reaches the second-level warning threshold, a second-level warning signal is issued and a second-level warning alarm is performed, and all first warning fans and second warning fans are automatically turned on, and all charging power supplies are automatically powered off; When the monitoring data is less than the secondary warning threshold, the secondary warning is automatically lifted; when a false alarm occurs, a manual reset is performed by clicking the reset button on the touch screen to restore power to all charging power sources; when the monitoring data exceeds the secondary warning value, manual reset is invalid, the charging power source is still powered off, all primary warning fans and secondary warning fans rotate at the same time, and a secondary warning signal is issued and a secondary warning alarm is performed until the gas concentration and temperature drop to the normal threshold, all primary warning fans and secondary warnings are turned off, and the secondary warning signal is lifted, and all charging power sources are automatically powered.

2. The lithium-ion battery charging box for electric bicycle and the thermal runaway prevention and control method thereof according to claim 1, characterized in that: The first connecting assembly includes a bottom support plate, a left pulley assembly and a right pulley assembly, wherein the bottom support plate is fixedly disposed laterally at the front end of the bottom side wall of the first accommodating cavity inside the first box body, wherein: The left pulley block is fixedly arranged on the left side of the bottom side wall of the first accommodating cavity inside the first box body, and the right pulley block is fixedly arranged on the right side of the bottom side wall of the first accommodating cavity inside the first box body; The first battery tray is located between the left pulley assembly and the right pulley assembly. The left side wall of the first battery tray is concavely formed with a first connecting groove along the longitudinal direction, and the right side wall of the first battery tray is concavely formed with a second connecting groove along the longitudinal direction.

3. The lithium-ion battery charging box for electric bicycle and the thermal runaway prevention and control method thereof according to claim 2, characterized in that: The left pulley assembly comprises a left fixing frame and a plurality of left pulleys arranged in the left fixing frame, wherein the left fixing frame is fixedly arranged on the left side of the bottom side wall of the first accommodating cavity along the longitudinal direction, and a plurality of first mounting cavities are arranged on the left fixing frame along the longitudinal direction, and a left pulley is installed in each of the first mounting cavities, and the plurality of left pulleys are slidably connected in the first connecting slide groove; The right pulley assembly includes a right fixing frame and a plurality of right pulleys arranged in the right fixing frame, the right fixing frame is fixedly arranged on the right side of the bottom side wall of the first accommodating cavity along the longitudinal direction, a plurality of second installation cavities are arranged on the right fixing frame along the longitudinal direction, a right pulley is installed in each of the second installation cavities, and the plurality of right pulleys are slidably connected in the second connecting groove.

4. The lithium-ion battery charging box for electric bicycle and the thermal runaway prevention and control method thereof according to claim 3, characterized in that: The first connection assembly further comprises a first longitudinal pulley block and a second longitudinal pulley block, wherein: The first longitudinal pulley block is arranged on the left side of the bottom side wall of the first accommodating cavity and is located on the right side of the left pulley assembly, and the first longitudinal pulley block includes a plurality of first pulleys arranged longitudinally, and a first connecting shaft is fixedly arranged in the first pulley; The second longitudinal pulley block is arranged on the right side of the bottom side wall of the first accommodating cavity and is located on the left side of the right pulley assembly. The second longitudinal pulley block includes a plurality of second pulleys arranged longitudinally, and a second connecting shaft is fixedly arranged in the second pulley.

5. The lithium-ion battery charging box for electric bicycle and the thermal runaway prevention and control method thereof according to claim 4, characterized in that: A first positioning slot and a second positioning slot are longitudinally arranged on the bottom lower surface of the first battery tray, the first pulley is slidably connected to the first positioning slot, and the second pulley is slidably connected to the second positioning slot.

6. The lithium-ion battery charging box for electric bicycle and the thermal runaway prevention and control method thereof according to claim 4, characterized in that: A first fixing groove is longitudinally arranged on the left side of the bottom side wall of the first accommodating cavity, the first pulley is slidably arranged in the first fixing groove, a first connecting hole is arranged on the left side wall of the first fixing groove, and a second connecting hole is arranged on the right side wall of the first fixing groove, and both ends of the first connecting shaft are respectively installed in the first connecting hole and the second connecting hole; A second fixing groove is longitudinally arranged on the right side of the bottom side wall of the first accommodating cavity, the second pulley is slidably arranged in the second fixing groove, a third connecting hole is arranged on the left side wall of the second fixing groove, and a fourth connecting hole is arranged on the right side wall of the second fixing groove, and both ends of the second connecting shaft are respectively installed in the third connecting hole and the fourth connecting hole.

7. The lithium-ion battery charging box for electric bicycle and the thermal runaway prevention and control method thereof according to claim 1, characterized in that: The left and right sides of the top side walls of the first accommodating cavity are respectively extended downward to fix a first fixing plate and a second fixing plate, the right side wall of the first fixing plate is concave to form a first connecting slide groove, the left side wall of the second fixing plate is concave to form a second connecting slide groove, a first push-pull plate is arranged above the first accommodating cavity, the left end of the first push-pull plate is arranged in the first connecting slide groove, the right end of the first push-pull plate is arranged in the second connecting slide groove, and the first push-pull plate is pushed and pulled and slides forward and backward along the first connecting slide groove and the second connecting slide groove; A first accommodating space is provided inside the first push-pull plate, and the first accommodating space is filled with a fire extinguishing agent. A plurality of first through holes are provided on the lower side wall of the first push-pull plate, and the first through holes are connected with the first accommodating space. A sealant is filled in the first through holes, and when the sealant encounters the flame of the burning lithium-ion battery on the first battery tray, it melts, and the first push-pull plate releases the fire extinguishing agent therein to extinguish the burning lithium-ion battery.

8. The lithium-ion battery charging box for electric bicycle and the thermal runaway prevention and control method thereof according to claim 1, characterized in that: A third fixing plate and a fourth fixing plate are respectively extended downward and fixedly arranged on the left and right sides of the top side wall of the second accommodating cavity, the right side wall of the third fixing plate is concave to form a third connecting slide groove, the left side wall of the fourth fixing plate is concave to form a fourth connecting slide groove, a second push-pull plate is arranged above the second accommodating cavity, the left end of the second push-pull plate is arranged in the third connecting slide groove, the right end of the second push-pull plate is arranged in the fourth connecting slide groove, and the second push-pull plate pushes and slides forward and backward along the third connecting slide groove and the fourth connecting slide groove; A second accommodating space is provided inside the second sliding plate, and the second accommodating space is filled with a fire extinguishing agent. A plurality of second through holes are provided on the lower side wall of the second sliding plate, and the second through holes are connected with the second accommodating space. The second through holes are filled with a sealant, and when the sealant encounters the flame of the burning lithium-ion battery on the second battery tray, it melts, and the second sliding plate releases the fire extinguishing agent therein to extinguish the burning lithium-ion battery.

9. The lithium-ion battery charging box for electric bicycle and the thermal runaway prevention and control method thereof according to claim 1, characterized in that: A fifth fixing plate and a sixth fixing plate are respectively extended downward and fixedly arranged on the left and right sides of the top side wall of the third accommodating cavity, the right side wall of the fifth fixing plate is concave to form a fifth connecting slide groove, the left side wall of the sixth fixing plate is concave to form a sixth connecting slide groove, a third push-pull plate is arranged above the third accommodating cavity, the left end of the third push-pull plate is arranged in the fifth connecting slide groove, the right end of the third push-pull plate is arranged in the sixth connecting slide groove, and the third push-pull plate can be pushed and slid forward and backward along the fifth connecting slide groove and the sixth connecting slide groove; A third accommodating space is provided inside the third sliding plate, and the third accommodating space is filled with a fire extinguishing agent. A plurality of third through holes are provided on the lower side wall of the third sliding plate, and the third through holes are communicated with the third accommodating space. The third through holes are filled with a sealant, and when the sealant encounters the flame of the burning lithium-ion battery on the third battery tray, it melts, and the third sliding plate releases the fire extinguishing agent therein to extinguish the burning lithium-ion battery.

10. The lithium-ion battery charging box for electric bicycle and the thermal runaway prevention and control method thereof according to claim 7, 8 or 9, characterized in that: When the fire extinguishing agent is composed of one of hydrogel, water or AVD fire extinguishing agent, the sealant is composed of paraffin; When the fire extinguishing agent is composed of one or more of silicon dioxide, ammonium dihydrogen phosphate, sodium bicarbonate or silicate, the sealant is composed of one or more of polypropylene, polyester or polyurethane.

11. The lithium-ion battery charging box for electric bicycle and the thermal runaway prevention and control method thereof according to claim 1, characterized in that: The left and right walls of the first box body are both provided with a first air inlet, the front side of the first box body is designed to be open, the front side of the first box body is provided with a first box cover, the first containing cavity is closed by the first box cover, and the side walls of the first box body are sequentially composed of a first carbon steel plate, a first aerogel layer or a first heat insulation cotton and a first stainless steel plate from the outside to the inside; The left and right walls of the second box body are both provided with a second air inlet, the front side of the second box body is designed to be open, and the front side of the second box body is provided with a second box cover, and the second accommodating cavity is closed by the second box cover, and the side walls of the second box body are sequentially composed of a second carbon steel plate, a second aerogel layer or a second heat insulation cotton, and a second stainless steel plate from the outside to the inside; The left and right walls of the third box body are both provided with a third air inlet, the front side of the third box body is designed to be open, and the front side of the third box body is provided with a third box cover, and the third containing cavity is closed by the third box cover, and the side walls of the third box body are composed of a third carbon steel plate, a third aerogel layer or a third thermal insulation cotton and a third stainless steel plate from the outside to the inside.

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