Lithium-ion battery pack thermal runaway processing system and method

Abstract

The present application provides a lithium-ion battery pack thermal runaway processing system and method, the system comprising a lithium-ion battery pack, an electrolyte suction device, a temperature detection device and a controller. The lithium-ion battery pack thermal runaway processing system provided by the present application, on the one hand, is provided with a temperature detection device on the inner wall of the lithium-ion battery pack shell, which can monitor the internal temperature of the lithium-ion battery pack in real time. After the thermal runaway phenomenon occurs, the thermal runaway phenomenon can be discovered in time and a solution can be implemented based on the internal temperature of the lithium-ion battery pack. On the other hand, the lithium-ion battery pack shell is connected to an electrolyte suction device. When a thermal runaway phenomenon occurs inside the lithium-ion battery pack, the electrolyte inside the lithium-ion battery pack shell is extracted through the electrolyte suction device to prevent the electrolyte inside the lithium-ion battery pack from continuing to react violently, fundamentally cutting off the source of the thermal runaway reaction, and effectively curbing the development of the thermal runaway reaction from inside the lithium-ion battery pack.

Description

Technical Field

[0001] The present application relates to the technical field of lithium-ion batteries, and in particular to a system and method for handling thermal runaway of a lithium-ion battery pack. Background Art

[0002] In recent years, the market share of electric vehicles has steadily increased. Lithium-ion batteries have excellent performance such as high voltage, high specific energy, long cycle life and no pollution to the environment, and have received great attention from the electric vehicle industry. However, during the thermal runaway of lithium-ion batteries, combustible mixed gases such as H2, CO or CH4 will be generated, which will accumulate inside the battery. After a certain pressure limit is reached inside the lithium-ion battery, the safety valve is opened by the combustible mixed gas and released into the external environment as the battery erupts. During the battery eruption process, the surface temperature of the lithium-ion battery can reach up to about 1000℃, and the temperature inside the lithium-ion battery cell is even higher, often accompanied by sparks, and its surface temperature is about 600-1200℃. Since the high temperature surface of the lithium-ion battery and the temperature of the sparks are much higher than the ignition temperature of the gaseous eruption, once the gaseous eruption is sprayed into the air and contacts with oxygen, it will easily catch fire and cause a fire. In addition, even if the gaseous eruption produced after the lithium-ion battery eruption does not catch fire, if it gradually accumulates to a certain amount, it may also explode, and its harm will be greater. Therefore, lithium-ion battery eruption is one of the potential safety hazards that may cause lithium-ion battery fires or even explosions. Fires and explosions caused by thermal runaway of lithium-ion batteries have been reported frequently, and the safety issues of lithium-ion battery use have become one of the main factors hindering its large-scale commercial application in the power supply industry.

[0003] The thermal runaway process of lithium-ion batteries is composed of a series of chemical reactions. In traditional solutions, due to the limitations of the structure of lithium-ion batteries themselves, only the stability of lithium-ion battery materials is changed during the lithium-ion battery design stage, or the external boundaries of lithium-ion batteries are adjusted after the lithium-ion battery is produced, such as thermal management. It is impossible to directly control the chemical reaction boundaries inside the lithium-ion battery cells, nor is it possible to effectively control the occurrence and development of the thermal runaway process. Summary of the invention

[0004] Based on this, it is necessary to provide a lithium-ion battery pack thermal runaway processing system and method to address the problem that traditional lithium-ion batteries cannot control the chemical reaction boundaries inside battery cells.

[0005] A lithium-ion battery pack thermal runaway processing system, comprising:

[0006] A lithium-ion battery pack comprises a shell, a plurality of battery cells arranged in the shell, and an electrolyte filled in the shell;

[0007] an electrolyte suction device connected to the housing;

[0008] a temperature detection device, fixedly disposed on the inner wall of the shell, for detecting the internal temperature of the shell; and

[0009] The controller is electrically connected to the electrolyte suction device and the temperature detection device respectively, and is used to control the electrolyte suction device to suck out the electrolyte in the shell.

[0010] The present application provides a lithium-ion battery pack thermal runaway processing system and method. The lithium-ion battery pack thermal runaway processing system includes a lithium-ion battery pack, an electrolyte suction device, a temperature detection device and a controller. The lithium-ion battery pack includes a shell, a plurality of battery cells arranged in the shell, and an electrolyte filled in the shell. The electrolyte suction device is connected to the shell, and the temperature detection device is fixedly arranged on the inner wall of the shell. The thermal runaway processing system for lithium-ion battery packs provided in the present application, on the one hand, is provided with a temperature detection device on the inner wall of the shell of the lithium-ion battery pack, which can monitor the internal temperature of the lithium-ion battery pack in real time, so that after the thermal runaway phenomenon occurs, the monitoring personnel can timely discover the thermal runaway phenomenon and implement a solution based on the internal temperature of the lithium-ion battery pack; on the other hand, the shell of the lithium-ion battery pack is connected to the electrolyte suction device, and when the thermal runaway phenomenon occurs inside the lithium-ion battery pack, the electrolyte inside the shell of the lithium-ion battery pack can be extracted through the electrolyte suction device to prevent the electrolyte inside the lithium-ion battery pack from continuing to react violently, thereby fundamentally cutting off the reaction source of the thermal runaway reaction, and effectively curbing the development of the thermal runaway reaction from inside the lithium-ion battery pack.

[0011] A method for handling thermal runaway of a lithium-ion battery pack, applied to the thermal runaway system of the lithium-ion battery pack mentioned above, comprising:

[0012] receiving the internal temperature of the housing acquired by the temperature detection device;

[0013] Determining whether the internal temperature of the housing is greater than the preset thermal runaway trigger temperature;

[0014] If the internal temperature of the shell is greater than the preset thermal runaway trigger temperature, the valve of the suction device is controlled to open, the first pressure pump is controlled to open, and the electrolyte suction device is controlled to suck the electrolyte in the shell into the electrolyte storage tank;

[0015] Continue to receive the internal temperature of the shell obtained by the temperature detection device until the internal temperature of the shell is lower than the preset thermal runaway trigger temperature, control the valve of the suction device and the first pressure pump to close, and control the electrolyte suction device to stop working.

[0016] The present application provides a lithium-ion battery pack thermal runaway processing system and method. The lithium-ion battery processing method obtains the internal temperature of the shell of the lithium-ion battery pack through a temperature detection device, and further, based on the comparison result of the internal temperature of the shell and the preset thermal runaway trigger temperature, controls the electrolyte suction device to suck the electrolyte in the shell into the electrolyte suction device, which can effectively prevent the electrolyte in the lithium-ion battery pack from continuing to react and avoid explosion and fire inside the lithium-ion battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of a lithium-ion battery pack provided in one embodiment of the present application;

[0018] Figure 2 A top view of a lithium-ion battery pack provided in one embodiment of the present application;

[0019] Figure 3 A schematic diagram of the assembly of a battery cell and a top cover plate in a lithium-ion battery pack provided in an embodiment of the present application;

[0020] Figure 4 A top view of a lithium-ion battery pack provided in one embodiment of the present application;

[0021] Figure 5 A top view of a lithium-ion battery pack provided in one embodiment of the present application;

[0022] Figure 6 A three-dimensional diagram of a lithium-ion battery pack provided in one embodiment of the present application;

[0023] Figure 7 A top view of a lithium-ion battery pack thermal runaway processing system provided in one embodiment of the present application;

[0024] Figure 8 A top view of a lithium-ion battery pack thermal runaway processing system provided in one embodiment of the present application;

[0025] Fig. 9 A schematic diagram of the structure of a lithium-ion battery pack heat dissipation system provided in one embodiment of the present application;

[0026] Fig.10 A schematic diagram of the structure of a lithium-ion battery pack heat dissipation system provided in one embodiment of the present application;

[0027] Fig.11A schematic diagram of the structure of a lithium-ion battery pack heat dissipation system provided in one embodiment of the present application;

[0028] Fig.12 A schematic diagram of the assembly of a battery cell and a heat dissipation core in a lithium-ion battery pack heat dissipation system provided in one embodiment of the present application;

[0029] Fig.13 A top view of a lithium-ion battery pack heat dissipation system provided in one embodiment of the present application;

[0030] Fig.14 A top view of a lithium-ion battery pack thermal runaway processing system provided in one embodiment of the present application;

[0031] Fig.15 A top view of a lithium-ion battery pack thermal runaway management system provided in one embodiment of the present application.

[0032] Reference numerals:

[0033] 10 housing; 100 lithium-ion battery pack; 110 top cover plate; 111 groove; 120 bottom pad;

[0034] 130 wall plate; 131 window door; 132 through hole; 133 rotating shaft; 134 observation window; 135 first valve

[0035] 136 second valve; 137 third valve; 138 opening; 140 storage space; 141 sub-storage space

[0036] 150 bracket; 151 buckle; 160 battery cell; 161 positive electrode sheet; 162 negative electrode sheet;

[0037] 163 positive electrode ear; 164 negative electrode ear; 170 positioning clip; 171 positioning shaft; 180 positioning hole

[0038] 190 electrolyte; 191 transmission pipeline; 192 recovery pipeline; 200 air pressure detection device

[0039] 300 gas storage device; 400 dilution device; 500 controller; 600 cooling device; 610 cooling coil

[0040] 611 heat dissipation coil cavity; 612 first pipe opening; 613 second pipe opening; 620 water cooling unit

[0041] 621 water tank; 622 water pump; 623 water outlet; 624 water inlet; 625 first pump outlet

[0042] 626 second pump port; 630 heat sink; 631 heat sink cavity; 632 connection buckle

[0043] 640 air cooling unit; 641 radiator; 642 cooling pipe

[0044] 700 electrolyte suction device; 710 electrolyte storage box; 720 capacity detection component

[0045] 730 suction device valve; 740 first pressure pump; 800 temperature detection device

[0046] 900 electrolyte recovery device; 910 electrolyte recovery tank; 920 recovery device valve;

[0047] 930 Second pressure pump DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of this application more clear, the lithium-ion battery pack provided by this application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain this application and are not used to limit this application.

[0049] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The present application provides a lithium-ion battery pack 100. It should be noted that the lithium-ion battery pack 100 provided in the present application does not limit the application scenario of the lithium-ion battery pack 100. The lithium-ion battery pack 100 provided in the present application can be used in any application scenario. Optionally, the lithium-ion battery pack 100 provided in the present application is applied to the field of electric vehicles. Specifically, the lithium-ion battery pack 100 is applied to the research on preventing thermal runaway of lithium-ion batteries from causing disasters such as fire or explosion.

[0051] See also Figure 1 and Figure 2 In one embodiment of the present application, the lithium-ion battery pack 100 includes a housing 10, a bracket 150, and a plurality of battery cells 160. Specifically, the lithium-ion battery pack 100 also includes an electrolyte filled in the housing 10. The battery cells 160 may be connected in series or in parallel.

[0052] The housing 10 includes a top cover plate 110, a bottom pad plate 120, and a plurality of wall plates 130 connected end to end in sequence. The top cover plate 110, the bottom pad plate 120, and the plurality of wall plates 130 together surround a storage space 140. The bracket 150 is disposed in the storage space 140, and is used to separate the storage space 140 into a plurality of sub-storage spaces 141. Each of the battery cells 160 is disposed in a sub-storage space 141. Each of the wall plates 130 is provided with a window door 131, so that the battery cell 160 can freely enter and exit the housing 10 through the window door 131.

[0053] Specifically, the material of the shell 10 can be one of an aluminum alloy and an iron-carbon alloy. The top surface of the bracket 150 is fixedly connected to the top cover plate 110, and the bottom surface of the bracket 150 is fixedly connected to the bottom pad 120 to divide the storage space 140 into the multiple sub-storage spaces 141. The arrangement of the bracket 150 can reduce the reaction area of ​​the electrolyte when the lithium-ion battery pack 100 has a thermal runaway phenomenon, avoid a chain reaction, and avoid the simultaneous release of energy to cause a sudden increase in the internal temperature and surface temperature of the lithium-ion battery pack 100. The top cover plate 110 can serve as the positive terminal of the lithium-ion battery pack 100, and the bottom pad 120 can serve as the negative terminal of the lithium-ion battery pack 100.

[0054] In this embodiment, the structure of the lithium-ion battery pack 100 provided in the present application, on the one hand, by means of a bracket 150 provided in the shell 10 of the lithium-ion battery pack 100, the storage space 140 in the shell 10 is divided into a plurality of independently sealed sub-storage spaces 141, which greatly reduces the volume of the electrolyte reaction inside the lithium-ion battery pack 100 when thermal runaway occurs, greatly reduces the electrolyte reaction rate, and thus curbs the further development of thermal runaway; on the other hand, a window door 131 is provided on the wall plate 130 of the shell 10, and the battery cell 160 in the lithium-ion battery pack 100 can be moved out of the shell 10 through the window door 131 when thermal runaway occurs, thereby effectively preventing further violent chemical reactions from occurring inside the lithium-ion battery pack 100.

[0055] like Figure 3As shown, in one embodiment of the present application, the battery cell 160 includes a positive electrode sheet 161, a negative electrode sheet 162, a positive electrode tab 163 and a negative electrode tab 164. The positive electrode sheet 161 and the negative electrode sheet 162 are wound together into a cylindrical shape. The positive electrode tab 163 is arranged on a side of the battery cell 160 close to the top cover plate 110 and is electrically connected to the positive electrode sheet 161. The negative electrode tab 164 is arranged on a side of the battery cell 160 close to the top cover plate 110 and is electrically connected to the negative electrode sheet 162.

[0056] Specifically, the battery cell 160 also includes a diaphragm, which is arranged between the positive electrode sheet 161 and the negative electrode sheet 162. The surface of the positive electrode sheet 161 is coated with a positive electrode material. The surface of the negative electrode sheet 162 is coated with a negative electrode material. Optionally, the material of the positive electrode sheet 161 may be aluminum. The material of the negative electrode sheet 162 may be copper. The battery cell 160 is a wound battery cell 160. The battery cell 160 is wound by the positive electrode sheet 161, the diaphragm and the negative electrode sheet 162. The positive electrode tab 163 is electrically connected to the positive electrode sheet 161, and the negative electrode tab 164 is electrically connected to the negative electrode sheet 162.

[0057] In this embodiment, the positive electrode tab 163 and the negative electrode tab 164 are arranged on the same side of the battery cell 160, so that the battery cell 160 can be connected to the top cover plate through the positive electrode tab 163 and the negative electrode tab 164, thereby avoiding short circuit and fire caused by chaotic wiring inside the shell 10.

[0058] Please continue reading Figure 3 In one embodiment of the present application, a plurality of grooves 111 are provided on the bottom surface of the top cover plate 110 . Each of the positive electrode tabs 163 is in contact with and connected to one of the grooves 111 . Each of the negative electrode tabs 164 is in contact with and connected to one of the grooves 111 .

[0059] Specifically, a plurality of grooves 111 are provided on the bottom surface of the top cover plate 110 , and a top surface of the bracket 150 is fixedly connected to the top cover plate 110 so that each of the sub-storage spaces 141 has at least two grooves 111 .

[0060] In addition, the size of the groove 111 is consistent with the size of the positive electrode tab 163 and the negative electrode tab 164, so that when the battery cell 160 is installed inside the housing 10, the positive electrode tab 163 and the negative electrode tab 164 are in close contact with the two grooves 111 of the top cover plate 110, respectively, to achieve the connection between the battery cell 160 and the top cover plate 110. It should be noted that the positive electrode tab 163 or the negative electrode tab 164 is connected to the groove 111 by contact connection, not fixed connection.

[0061] In this embodiment, by providing the groove 111, when thermal runaway occurs in a sub-storage space 141 in the shell 10 of the lithium-ion battery pack 100, the window door 131 on the wall panel 130 can be opened quickly and conveniently to take out the battery cell 160 in the sub-storage space 141.

[0062] In one embodiment of the present application, the top cover plate 110 is made of a conductive material. The bottom surface of the top cover plate 110 except the groove 111 is coated with an insulating paint.

[0063] Specifically, insulating paint is applied to the bottom surface of the top cover plate 110 except for the groove 111, which can maintain the good insulation and airtightness of the sub-storage space 141, and prevent the leakage of electrolyte between the multiple sub-storage spaces 141, resulting in a chain reaction of thermal runaway. In addition, the top cover plate 110 can serve as the positive terminal of the lithium-ion battery pack 100. Wires can be arranged in the top cover plate 110, and the top cover plate 110 is electrically connected to the multiple battery cells 160 through the wires and the multiple grooves 111 to normally realize the lithium de-lithiation and lithium insertion cycle of the lithium-ion battery. The multiple battery cells 160 can also be connected in series or in parallel through the wires.

[0064] In one embodiment of the present application, the top surface of the bracket 150 is fixedly connected to the bottom surface of the top cover plate 110, and the bottom surface of the bracket 150 is fixedly connected to the top surface of the bottom pad 120 to form a plurality of independent and closed sub-storage spaces 141. The surface of the bracket 150 and the top surface of the bottom pad 120 are coated with insulating paint.

[0065] Specifically, the bracket 150 may be made of a heat-resistant material that does not deform in a high temperature environment. Optionally, the top surface of the bracket 150 is welded to the bottom surface of the top cover plate 110 , and the bottom surface of the bracket 150 is welded to the top surface of the bottom pad plate 120 .

[0066] like Figure 4As shown, in one embodiment of the present application, the bracket 150 is provided with a plurality of buckles 151 so that each of the battery cells 160 is buckled with the bracket 150 .

[0067] Specifically, the bracket 150 is provided with a plurality of buckles 151, and each of the sub-storage spaces 141 has one buckle 151. Each buckle 151 is clamped to one of the battery cells 160. The buckle 151 has a clamped state and a relaxed state. When the buckle 151 is in the clamped state, the battery cell 160 can be fixed to the bracket 150 by the buckle 151. When the buckle 151 is in the relaxed state, the battery cell 160 fixed to the bracket 150 can be detached from the bracket 150 by the buckle 151.

[0068] In this embodiment, by providing the buckle 151, the battery cell 160 can be fixed in the housing 10 to perform normal lithium removal and lithium insertion when the lithium-ion battery pack 100 does not experience thermal runaway. When the lithium-ion battery pack 100 experiences thermal runaway, the buckle 151 allows the battery cell 160 to be removed from the bracket 150 and detached from the housing 10 of the lithium-ion battery pack 100 through the window door 131 on the wall plate 130.

[0069] like Figure 5 As shown, in one embodiment of the present application, a positioning clip 170 is disposed in each of the sub-storage spaces 141. The positioning clip 170 is used to clamp the battery cell 160 so that the battery cell 160 is fixedly connected to the housing 10.

[0070] Specifically, the function of the positioning clip 170 is equivalent to that of the buckle 151 in the above embodiment.

[0071] In an embodiment of the present application, the positioning clip 170 includes a positioning shaft 171 , the positioning shaft 171 is fixedly connected to the bottom pad 120 , and the positioning clip 170 is made of a heat-resistant and insulating material.

[0072] Specifically, a spring and a positioning shaft 171 are provided in the positioning clip 170. The positioning shaft 171 is fixedly connected to the bottom pad 120, and the spring passes through the bottom pad 120. The cooperation between the spring and the positioning shaft 171 enables the positioning clip 170 to clamp the battery cell 160 and fix it in the sub-storage space 141.

[0073] like Figure 6As shown, in one embodiment of the present application, the wall plate 130 is provided with a through hole 132. The size of the through hole 132 is larger than the size of the battery cell 160, so that the battery cell 160 can freely enter and exit the housing 10 through the through hole 132. The lithium-ion battery pack 100 further includes a rotating shaft 133. The rotating shaft 133 is disposed between the window door 131 and the wall plate 130, so that the window door 131 covers the through hole 132.

[0074] Specifically, the window door 131 is made of an insulating material or the surface of the window door 131 is coated with insulating paint. When the lithium-ion battery pack 100 is normally charged and discharged and no thermal runaway occurs, the window door 131 covers the through hole 132 to make the interior of the lithium-ion battery pack 100 airtight, thereby preventing the electrolyte inside the lithium-ion battery pack 100 from overflowing and causing leakage. When the lithium-ion battery pack 100 has a thermal runaway phenomenon, the window door 131 can be opened to remove the battery cell 160 in the sub-storage space 141 that has a thermal runaway phenomenon through the through hole 132, thereby effectively preventing further violent chemical reactions from occurring inside the lithium-ion battery pack 100.

[0075] In addition, each sub-storage space 141 has the corresponding through hole 132 and the window door 131, so that when the maintenance personnel of the lithium-ion battery pack 100 find that a certain battery cell 160 or the electrolyte in a certain area in the lithium-ion battery pack 100 has a thermal runaway phenomenon, it is not necessary to remove or destroy all the battery cells 160. After the battery cell 160 in the sub-storage space 141 with the thermal runaway phenomenon is removed, the battery cells 160 and the electrolyte in the remaining sub-storage spaces 141 can still work normally.

[0076] Please continue reading Figure 6 In one embodiment of the present application, the lithium-ion battery pack 100 further includes an observation window 134. The observation window 134 is embedded in the window door 131 and is used to observe the internal state of the lithium-ion battery pack 100. The observation window 134 is made of heat-resistant glass.

[0077] Specifically, the maintenance personnel of the lithium-ion battery pack 100 can observe the internal state of the lithium-ion battery pack 100 at any time through the observation window 134, so as to timely discover and take corresponding measures when thermal runaway occurs inside the lithium-ion battery pack.

[0078] The present application provides a lithium-ion battery pack 100, comprising a housing 10, a bracket 150 and a plurality of battery cells 160. The housing 10 comprises a top cover plate 110, a bottom pad plate 120 and a plurality of wall plates 130 connected end to end in sequence. A window door 131 is provided on each of the wall plates, so that the battery cells 160 can freely enter and exit the housing 10 through the window door 131. The bracket 150 is provided with a buckle 151 or a positioning clip 170. The structure of the lithium-ion battery pack 100 provided in the present application, on the one hand, is provided with a bracket 150 in the shell 10 of the lithium-ion battery pack 100, and the storage space 140 in the shell 10 is divided into a plurality of independently sealed sub-storage spaces 141, which greatly reduces the volume of the electrolyte reaction inside the lithium-ion battery pack 100 when thermal runaway occurs, and greatly reduces the electrolyte reaction rate, thereby curbing the further development of thermal runaway; on the other hand, a window door 131 is opened on the wall plate 130 of the shell, and the battery cell 160 in the lithium-ion battery pack 100 can be moved out of the shell 10 through the window door 131 when thermal runaway occurs, effectively preventing further violent chemical reactions from occurring inside the lithium-ion battery pack 100.

[0079] The present application also provides a lithium-ion battery pack thermal runaway processing system and method.

[0080] like Figure 7 As shown, in one embodiment of the present application, the thermal runaway processing system for a lithium-ion battery pack provided by the present application includes the lithium-ion battery pack 100 mentioned in the foregoing content. The thermal runaway processing system for a lithium-ion battery pack also includes an air pressure detection device 200, an air storage device 300, a dilution device 400 and a controller 500. The air storage device 300 and the dilution device 400 are respectively connected to the lithium-ion battery pack 100 through a gas pipeline. The controller 500 is electrically connected to the air pressure detection device 200, the air storage device 300 and the dilution device 400, respectively. The air pressure detection device 200 is disposed in the lithium-ion battery pack 100.

[0081] Specifically, the controller 500 may be disposed in a monitoring module connected to the thermal runaway processing system of the lithium-ion battery pack. The controller 500 may control the gas storage device 300 or the dilution device 400 to be connected to the lithium-ion battery pack 100 through the monitoring module.

[0082] It should be noted that the thermal runaway processing system for lithium-ion battery packs does not limit its application environment. Optionally, the thermal runaway processing system for lithium-ion battery packs can be applied to scientific research. Optionally, the thermal runaway processing system for lithium-ion battery packs can be applied to electric vehicles. Specifically, the thermal runaway processing system for lithium-ion battery packs can be installed on electric vehicles to deal with thermal runaway phenomena that may occur in electric vehicle batteries. Optionally, the thermal runaway processing system for lithium-ion battery packs can be applied to transfer stations or charging stations for electric vehicles, and the thermal runaway state of the electric vehicle battery is monitored when the electric vehicle passes through the transfer station or charging station.

[0083] In this embodiment, the lithium-ion battery pack 100 includes a housing 10 and a plurality of battery cells 160 disposed in the housing 10. The air pressure detection device 200 is disposed in the housing 10 and is used to detect the gas pressure in the housing 10. The controller 500 is used to control the gas storage device 300 or the dilution device 400 to adjust the gas pressure in the housing 10 according to the gas pressure in the housing 10. The controller 500 may be a processor.

[0084] In this embodiment, the thermal runaway processing system of the lithium-ion battery pack provided by the present application, on the one hand, is provided with the air pressure detection device 200 in the shell 10 of the lithium-ion battery pack 100, which can monitor the internal air pressure of the lithium-ion battery pack 100 in real time, so that after the thermal runaway process occurs, the monitoring personnel can take quick action according to the internal air pressure of the lithium-ion battery pack 100. On the other hand, the lithium-ion battery pack 100 is electrically connected to the gas storage device 300 and the dilution device 400, and when the battery cell 160 in the lithium-ion battery pack 100 has thermal runaway, the battery cell 160 can be moved out of the shell 10 through the window door 131, and the gas storage device 300 or the dilution device 400 can be controlled to adjust the gas pressure in the shell 10, so as to effectively prevent further violent chemical reactions from occurring inside the lithium-ion battery pack 100.

[0085] In one embodiment of the present application, the housing 10 includes a top cover plate 110, a bottom pad plate 120, and a plurality of wall plates 130 connected end to end in sequence. The top cover plate 110, the bottom pad plate 120, and the plurality of wall plates 130 together surround and form a storage space 140. The housing 10 also includes a bracket 150. The housing 10 also includes a bracket 150, which is disposed in the storage space 140 and is used to separate the storage space 140 into a plurality of sub-storage spaces 141.

[0086] This embodiment has been mentioned in the above content and will not be repeated here.

[0087] In one embodiment of the present application, each of the battery cells 160 is disposed in one of the sub-storage spaces 141. Each of the battery cells 160 is electrically connected to the top cover plate 110, respectively.

[0088] This embodiment has been mentioned in the above content and will not be repeated here.

[0089] like Figure 8 As shown, in one embodiment of the present application, one air pressure detection device 200 is disposed in each of the sub-storage spaces 141 . The air pressure detection device 200 is used to detect the air pressure of each of the sub-storage spaces 141 .

[0090] Specifically, the air pressure detection device 200 may be an air pressure sensor. The air pressure detection device 200 may be fixed to the inner wall of the housing 10. Figure 4 For example, the bracket 150 in the shell 10 divides the storage space 140 in the shell 10 into four sub-storage spaces 141. Accordingly, four air pressure detection devices 200 are arranged in the shell 10. Each of the sub-storage spaces 141 is provided with an air pressure detection device 200 to detect the gas pressure in different sub-storage spaces 141. The multiple air pressure detection devices 200 are also electrically connected to the controller 500 respectively to send the gas pressure in the shell 10 obtained by detection to the controller 500.

[0091] In this embodiment, by setting the air pressure detection device 200 in the sub-storage space 141 in the shell 10, real-time monitoring of the pressure state of the sub-storage space 141 in the shell 10 is achieved. Once thermal runaway occurs inside the lithium-ion battery pack 100, the air pressure detection device 200 can detect the pressure change in the shell 10 in the first time, so that the maintenance personnel of the lithium-ion battery pack 100 can discover it in time and take corresponding measures.

[0092] Continue reading Figure 8 In one embodiment of the present application, the wall plate 130 is provided with a plurality of first valves 135, a plurality of second valves 136 and a plurality of third valves 137. Each of the sub-storage spaces 141 has a corresponding first valve 135, a second valve 136 and a third valve 137. The plurality of first valves 135 are connected to the gas storage device 300 via a gas pipeline. The plurality of third valves 137 are connected to the dilution device 400 via a gas pipeline.

[0093] In this embodiment, by providing a plurality of first valves 135, a plurality of second valves 136, and a plurality of third valves 137 on the wall plate 130 of the shell 10 of the lithium-ion battery pack 100, when thermal runaway occurs, the gas storage device 300 or the dilution device 400 can be connected to the lithium-ion battery pack 100 by opening the corresponding valves, thereby timely and effectively adjusting the gas pressure in the shell 10, thereby preventing the further development of the thermal runaway phenomenon from inside the lithium-ion battery pack 100.

[0094] In one embodiment of the present application, the thermal runaway processing method of a lithium-ion battery pack provided by the present application includes the following steps S100 to S160:

[0095] S100 , receiving the gas pressure of the sub-storage space 141 acquired by the gas pressure detection device 200 .

[0096] Specifically, the air pressure detection device 200 obtains the air pressure in the sub-storage space 141 , and sends the air pressure in the sub-storage space 141 to the controller 500 .

[0097] S110, determining whether the gas pressure in the sub-storage space 141 is greater than the first preset pressure.

[0098] After the controller 500 receives the gas pressure of the sub-storage space 141, the controller 500 retrieves the first preset pressure pre-stored in the monitoring module. The first preset pressure is pre-set by the lithium-ion battery pack monitoring personnel. Further, the controller 500 compares the gas pressure of the sub-storage space 141 with the value of the first preset pressure to determine whether the gas pressure of the sub-storage space 141 is greater than the first preset pressure.

[0099] S120: If the gas pressure of the sub-storage space 141 is greater than the first preset pressure, continue to determine whether the gas pressure of the sub-storage space 141 is greater than the second preset pressure. The second preset pressure is greater than the first preset pressure.

[0100] Specifically, the value of the second preset pressure is greater than the first preset pressure. The first preset pressure is a low-risk pressure. The second preset pressure is a high-risk pressure. If the gas pressure in the sub-storage space 141 is greater than the first preset pressure, it means that the electrolyte 190 or the battery cell 160 inside the lithium-ion battery pack 100 has begun to react and has produced a thermal runaway phenomenon, but the risk factor is low. In order to detect whether the lithium-ion battery pack 100 is in a thermal runaway state with a high risk factor, it is necessary to further determine whether the gas pressure in the sub-storage space 141 is greater than the second preset pressure.

[0101] S130 , if the gas pressure in the sub-storage space 141 is not greater than the second preset pressure, controlling the gas mixture in the sub-storage space 141 to enter the gas storage device 300 .

[0102] Specifically, if the gas pressure of the sub-storage space 141 is not greater than the second preset pressure, it means that the electrolyte 190 or the battery cell 160 inside the lithium-ion battery pack 100 has not reacted violently, nor has a serious thermal runaway phenomenon occurred. The lithium-ion battery pack 100 is at risk of fire or explosion at any time. Subsequently, the controller 500 makes a solution to the thermal runaway phenomenon with a low risk factor, that is, controls the gas mixture in the sub-storage space 141 to enter the gas storage device 300. In addition, the controller 500 can perform steps S100 to S130 for the multiple sub-storage spaces 141 respectively, so as to open the gas storage device 300 for the sub-storage space 141 where the gas pressure is abnormal. The gas storage device 300 can inhale the flammable gas mixture generated by the thermal runaway reaction in the sub-storage space 141, and slow down the thermal runaway reaction rate in the sub-storage space 141.

[0103] S150, return to step S100.

[0104] Specifically, the controller 500 returns to step S100 and continues to monitor the change of air pressure in the sub-storage space 141.

[0105] In this embodiment, the lithium-ion battery processing method obtains the gas pressure in the sub-storage space 141 of the lithium-ion battery pack 100 through the air pressure detection device 200. Furthermore, based on the comparison result of the gas pressure in the sub-storage space 141 and the first preset pressure, and the comparison result of the gas pressure in the sub-storage space 141 and the second preset pressure, the gas storage device 300 is controlled to store the gas mixture in the sub-storage space 141, which can effectively reduce the density of the gas mixture in the sub-storage space 141 after the thermal runaway reaction occurs, thereby avoiding explosion and fire inside the lithium-ion battery pack 100.

[0106] In one embodiment of the present application, step S130 includes:

[0107] S131, controlling the first valve 135 to open, and controlling the second valve 136 and the third valve 137 to close.

[0108] Specifically, the first valve 135 is connected to the gas storage device 300 through a gas pipeline. Therefore, the controller 500 controls the first valve 135 to open, and controls the second valve 136 and the third valve 137 to close, so as to connect the gas storage device 300 with the sub-storage space 141 .

[0109] like Fig.11 As shown, in one embodiment of the present application, the lithium-ion battery pack thermal runaway processing method further includes the following steps S140 to S160:

[0110] S140 , if the gas pressure in the sub-storage space 141 is greater than the second preset pressure, controlling the dilution device 400 to input dilution gas into the sub-storage space 141 .

[0111] Specifically, if the gas pressure of the sub-storage space 141 is greater than the second preset pressure, it means that the electrolyte 190 or the battery cell 160 inside the lithium-ion battery pack 100 has reacted violently, resulting in serious thermal runaway. The lithium-ion battery pack 100 is in danger of fire or explosion at any time. At this time, the use of the gas storage device 300 to absorb the combustible gas mixture in the sub-storage space 141 can no longer effectively control the thermal runaway reaction. The controller 500 closes the connection between the shell 10 and the gas storage device 300, and connects the dilution device 400 to the shell 10.

[0112] The dilution device 400 stores the dilution gas. The dilution gas is a non-flammable protective gas. The protective gas may be CO2 gas. The gas mixture inside the housing 10 may be a combustible gas such as H2, CO and CH4.

[0113] In this embodiment, the non-flammable protective gas is introduced into the sub-storage space 141 through the dilution device 400, which can effectively dilute the concentration of the combustible gas in the sub-storage space 141, thereby effectively curbing the further development of the thermal runaway reaction.

[0114] S160, return to step S100.

[0115] Specifically, the controller 500 returns to step S100 and continues to monitor the change of air pressure in the sub-storage space 141.

[0116] In one embodiment of the present application, step S140 includes:

[0117] S141, controlling the second valve 136 to open, controlling the first valve 135 to close, and controlling the third valve 137 to close, for a preset time.

[0118] Specifically, the second valve 136 is connected to the gas storage device 300 through a gas pipeline, so the controller 500 controls the second valve 136 to open, controls the second valve 136 and the third valve 137 to close, and connects the dilution device 400 to the sub-storage space 141. The preset time is manually set by the lithium-ion battery pack maintenance personnel. By controlling the second valve 136 to open for a preset time, the combustible gas mixture and the non-flammable protective gas in the sub-storage space 141 can be fully mixed to achieve the effect of diluting the combustible gas mixture.

[0119] S142, after the preset time ends, controlling the second valve 136 and the third valve 137 to open, and controlling the first valve 135 to close.

[0120] Specifically, the third valve 137 is disposed on the wall plate 130 of the shell 10, and is used to discharge the diluted mixed gas from the shell 10. The third valve 137 can be connected to a processing device to collect the diluted mixed gas for subsequent separate processing. The third valve 137 can also be directly connected to the outside world to facilitate the discharge of the diluted mixed gas to the outside world. When the third valve 137 is opened, the second valve 136 remains open so that the diluted gas continues to be filled into the sub-storage space 141 to further dilute the combustible gas mixture in the sub-storage space 141.

[0121] In this embodiment, the controller 500 connects the dilution device 400 with the lithium-ion battery when severe thermal runaway occurs inside the lithium-ion battery pack 100 by opening the second valve 136 and the third valve 137, thereby diluting the combustible gas mixture in the sub-storage space 141 and effectively controlling the further development of the thermal runaway reaction from inside the lithium-ion battery pack 100.

[0122] In one embodiment of the present application, the lithium-ion battery pack thermal runaway processing method further includes the following step S170:

[0123] S170: If the gas pressure in the sub-storage space 141 is not greater than the first preset pressure, the first valve 135, the second valve 136 and the third valve 137 are controlled to be closed.

[0124] Specifically, if the gas pressure of the sub-storage space 141 is not greater than the first preset pressure, it means that the electrolyte 190 or the battery cell 160 inside the lithium-ion battery pack 100 has not reacted and no thermal runaway has occurred. The lithium-ion battery pack 100 is in a relatively safe state.

[0125] The lithium-ion battery processing method provided in the present application obtains the gas pressure in the sub-storage space 141 of the lithium-ion battery pack 100 through the gas pressure detection device 200, and controls the gas storage device 300 to store the gas mixture in the sub-storage space 141 based on the comparison result of the gas pressure in the sub-storage space 141 and the first preset pressure, and the comparison result of the gas pressure in the sub-storage space 141 and the second preset pressure, so as to effectively reduce the density of the gas mixture in the sub-storage space 141 after the thermal runaway reaction occurs, thereby avoiding explosion and fire inside the lithium-ion battery pack 100.

[0126] The present application also provides a heat dissipation system for a lithium-ion battery pack 100 .

[0127] like Fig. 9 As shown, in one embodiment of the present application, the heat dissipation system of the lithium-ion battery pack 100 includes the lithium-ion battery pack 100 mentioned above and a heat dissipation device 600. The heat dissipation device 600 is in contact with the lithium-ion battery pack 100.

[0128] The lithium-ion battery pack 100 includes a housing 10 and a plurality of battery cells 160 disposed in the housing 10. The heat dissipation device 600 is used to transfer the heat inside the lithium-ion battery pack 100 to the outside when thermal runaway occurs in the lithium-ion battery pack 100. The heat dissipation device 600 includes a heat dissipation coil 610. The heat dissipation coil 610 is wound around the outer surface of the housing 10.

[0129] Specifically, the heat dissipation coil 610 is made of a material that is resistant to high temperatures and has excellent thermal conductivity. Optionally, the material of the heat dissipation coil 610 is ceramic. The size of the heat dissipation coil 610 matches the size of the housing 10 so that the heat dissipation coil 610 is in close and full contact with the housing 10.

[0130] In this embodiment, the heat dissipation system of the lithium-ion battery pack 100 is provided with a heat dissipation coil 610 around the outer surface of the shell 10 of the lithium-ion battery pack 100, so that when a thermal runaway reaction occurs in the lithium-ion battery pack 100, a part of the heat generated inside the lithium-ion battery pack 100 is promptly transferred to the heat dissipation coil 610, thereby reducing the safety hazard of the lithium-ion battery pack 100 under thermal runaway.

[0131] Please continue reading Fig. 9 In one embodiment of the present application, the heat dissipation coil 610 is provided with a heat dissipation coil cavity 611. The heat dissipation coil cavity 611 contains circulating water.

[0132] Specifically, the circulating water in the heat dissipation coil cavity 611 can be replaced regularly to maintain the excellent heat dissipation performance of the heat dissipation coil 610. Other excellent heat-conducting media can also be placed in the heat dissipation coil cavity 611.

[0133] like Fig.10 As shown, in one embodiment of the present application, the heat dissipation device 600 further includes a water-cooled heat dissipation unit 620. The water-cooled heat dissipation unit 620 is connected to the heat dissipation coil 610 via a water pipeline. The water-cooled heat dissipation unit 620 includes a water tank 621 and a water pump 622. The water tank 621 is connected to the heat dissipation coil 610 via a water pipeline. The water pump 622 is disposed on the water pipeline between the water tank 621 and the heat dissipation coil 610. The water pump 622 is used to transport the circulating water in the water tank 621 to the heat dissipation coil 610 to achieve heat exchange between the water tank 621 and the lithium-ion battery pack 100.

[0134] In this embodiment, by setting the water-cooling heat dissipation unit 620, the circulating water in the water tank 621 in the water-cooling heat dissipation unit 620 can be transported to the heat dissipation coil 610 through the water pump 622. After the circulating water in the heat dissipation coil 610 has completed the heat exchange with the shell 10 of the lithium-ion battery pack 100, the circulating water is re-input into the water tank 621 to achieve circulating heat dissipation, which is low in cost and easy to implement.

[0135] Continue reading Fig.10In one embodiment of the present application, the water tank 621 includes a water outlet and a water inlet 624. The water pump 622 includes a first pump inlet 625 and a second pump inlet 626. The heat dissipation coil 610 includes a first pipe inlet 612 and a second pipe inlet 613. The water outlet is connected to the first pump inlet 625 through a water pipeline, the second pump inlet 626 is connected to the first pipe inlet 612 through a water pipeline, and the second pipe inlet 613 is connected to the water inlet 624 through a water pipeline.

[0136] Specifically, the circulating water in the water tank 621 flows out through the water outlet, flows into the water pump 622 through the first pump port 625, and flows out of the water pump 622 through the second pump port 626. After the circulating water flows out of the water pump 622, it enters the heat dissipation coil 610 through the first pipe port 612, and after heat exchange with the housing 10, it flows into the water inlet 624 through the second pipe port 613, and then returns to the water tank 621 to achieve circulating heat dissipation.

[0137] like Fig.11 As shown, in one embodiment of the present application, the heat dissipation device 600 further includes a heat dissipation core 630. The heat dissipation core 630 is provided with a heat dissipation core cavity 631, and the heat dissipation core cavity 631 contains a heat conducting medium.

[0138] Specifically, the heat dissipation core 630 is made of a material that is resistant to high temperatures and has excellent thermal conductivity. Optionally, the material of the heat dissipation core 630 is ceramic.

[0139] like Fig.12 As shown, in one embodiment of the present application, the battery cell 160 includes a positive electrode sheet 161 and a negative electrode sheet 162. The positive electrode sheet 161 and the negative electrode sheet 162 are wound around the heat dissipation core 630 into a cylindrical shape and attached to the heat dissipation core 630.

[0140] Specifically, during the production process of the lithium-ion battery pack 100, the heat dissipation core 630 can be wound together with the positive electrode sheet 161 and the negative electrode sheet 162 to form the battery cell 160. When the lithium-ion battery pack 100 is working normally, once thermal runaway occurs, the heat dissipation core 630 can take away the heat generated in the battery cell 160.

[0141] Continue reading Fig.11In one embodiment of the present application, the heat dissipation device 600 further includes an air-cooled heat dissipation unit 640. The air-cooled heat dissipation unit 640 includes a radiator 641 and a heat dissipation pipe 642. The heat dissipation pipe 642 is arranged between the radiator 641 and the heat dissipation core 630. The radiator 641 is used to exchange heat with air. The heat dissipation pipe 642 is used to transfer the heat of the heat dissipation core 630 to the radiator 641.

[0142] Specifically, the heat sink 641 may be provided with a plurality of heat sinks and a plurality of fans.

[0143] In this embodiment, by providing the heat dissipation core 630 and the air-cooled heat dissipation unit 640, when thermal runaway occurs in the lithium-ion battery pack 100, not only can the heat dissipation core 630 achieve a heat dissipation effect, but also the heat generated in the battery cell 160 can be continuously discharged to the radiator 641 through the heat dissipation pipe 642, thereby achieving efficient heat dissipation.

[0144] The two ends of the heat dissipation core 630 are respectively provided with connection clips, and one end of the heat sink 641 is engaged with the connection clip 632151. The other end of the heat sink 641 is fixedly connected to the heat sink 641.

[0145] Specifically, the connection method between the heat dissipation core 630 and the radiator 641 may not be limited. In addition to being connected through the connection buckle 632151, they may also be connected through other contact methods.

[0146] In one embodiment of the present application, the housing 10 further includes a top cover plate 110, a bottom pad plate 120, and a plurality of wall plates 130 connected end to end in sequence. The top cover plate 110, the bottom pad plate 120, and the plurality of wall plates 130 together surround and form a storage space 140. The top cover plate 110 and the bottom pad plate 120 are respectively provided with positioning holes 180, so that the connection buckles 632151 at both ends of the heat dissipation core 630 can extend out of the housing 10 through the positioning holes 180.

[0147] In this embodiment, by providing the positioning hole 180 , the heat dissipation core 630 can be extended out of the housing 10 , so as to facilitate the connection between the heat dissipation core 630 and the radiator 641 .

[0148] In one embodiment of the present application, the heat dissipation system of the lithium-ion battery pack 100 further includes a bracket 150 . The bracket 150 is disposed in the storage space 140 to divide the storage space 140 into a plurality of sub-storage spaces 141 .

[0149] This embodiment has been mentioned in the above content and will not be described again here.

[0150] like Fig.13 As shown, in one embodiment of the present application, each of the battery cells 160 is disposed in a sub-storage space 141. Each of the sub-storage spaces 141 is provided with an air-cooling heat dissipation unit 640.

[0151] This embodiment has been mentioned in the above content and will not be described again here. In this embodiment, by providing the plurality of sub-storage spaces 141 and the air-cooling heat dissipation units 640 corresponding to the plurality of sub-storage spaces 141, when the plurality of sub-storage spaces 141 simultaneously experience thermal runaway, the plurality of air-cooling heat dissipation units 640 can simultaneously produce an excellent heat dissipation effect on the lithium-ion battery pack 100, and when the single sub-storage space 141 simultaneously experiences thermal runaway, resources will not be wasted, and the heat dissipation method is flexible, the heat dissipation efficiency is high, and the heat dissipation speed is fast.

[0152] The lithium-ion battery pack heat dissipation system provided in the present application, on the one hand, forms the water-cooling heat dissipation unit 620 by winding a heat dissipation coil 610 around the outer surface of the shell 10 of the lithium-ion battery pack 100, so that when the lithium-ion battery pack 100 has a thermal runaway reaction, a part of the heat generated inside the lithium-ion battery pack 100 is promptly transferred to the heat dissipation coil 610, thereby reducing the safety hazard of the lithium-ion battery pack 100 under thermal runaway; on the other hand, the air-cooling heat dissipation unit 640 is formed by arranging a heat dissipation core 630 containing a heat-conducting medium and a radiator 641 connected to the heat dissipation core 630 inside the battery cell 160 of the lithium-ion battery pack 100, so that when the lithium-ion battery pack 100 has a thermal runaway reaction, the water-cooling heat dissipation unit 620 and the air-cooling heat dissipation unit 640 work together to effectively cool the inside of the lithium-ion battery pack 100, thereby curbing the further development of the thermal runaway reaction of the lithium-ion battery pack 100.

[0153] The present application also provides another lithium-ion battery pack thermal runaway processing system and method.

[0154] like Fig.14As shown, in one embodiment of the present application, the thermal runaway control system of the lithium-ion battery pack 100 includes the lithium-ion battery pack 100 mentioned above, the electrolyte suction device 700, the temperature detection device 800 and the controller 500 mentioned above. The lithium-ion battery pack 100 includes a housing 10, a plurality of battery cells 160 disposed in the housing 10 and the electrolyte 190 filled in the housing 10. The electrolyte suction device 700 is connected to the housing 10. The temperature detection device 800 is fixedly disposed on the inner wall of the housing 10. The controller 500 is electrically connected to the electrolyte suction device 700 and the temperature detection device 800 respectively. The temperature detection device 800 is used to detect the internal temperature of the housing 10. The controller 500 is used to control the electrolyte suction device 700 to suck out the electrolyte 190 in the housing 10.

[0155] Specifically, the electrolyte suction device 700 can accommodate the electrolyte 190 extracted from the housing 10. The capacity of the electrolyte suction device 700 is greater than or equal to the capacity of the housing 10, so that when a thermal runaway phenomenon with a high risk factor occurs in the lithium-ion battery pack 100, the electrolyte suction device 700 can extract all the electrolyte 190 in the housing 10 to cut off the reaction source of the thermal runaway reaction.

[0156] The temperature detection device 800 may be a temperature sensor. There may be multiple temperature sensors. When there are multiple temperature sensors, the controller 500 may detect multiple internal temperatures of the housing 10 acquired by the temperature detection device 800, and take the average value of the multiple internal temperatures of the housing 10 as the final detection value, so that the detection result of the internal temperature of the housing 10 is accurate and close to the actual value.

[0157] In this embodiment, the thermal runaway processing system of the lithium-ion battery pack provided by the present application, on the one hand, by setting a temperature detection device 800 on the inner wall of the shell 10 of the lithium-ion battery pack 100, the internal temperature of the lithium-ion battery pack 100 can be monitored in real time, so that after the thermal runaway phenomenon occurs, the monitoring personnel can timely discover the thermal runaway phenomenon and implement a solution based on the internal temperature of the lithium-ion battery pack 100. On the other hand, the shell 10 of the lithium-ion battery pack 100 is connected to the electrolyte suction device 700, and when the thermal runaway phenomenon occurs inside the lithium-ion battery pack 100, the electrolyte 190 inside the shell 10 of the lithium-ion battery pack 100 can be extracted through the electrolyte suction device 700 to prevent the electrolyte 190 inside the lithium-ion battery pack 100 from continuing to react violently, thereby fundamentally cutting off the source of the thermal runaway reaction, and effectively curbing the development of the thermal runaway reaction from inside the lithium-ion battery pack 100.

[0158] In one embodiment of the present application, the lithium-ion battery pack 100 includes the housing 10 and the bracket 150. The housing 10 includes a top cover plate 110, a bottom pad plate 120, and a plurality of wall plates 130 connected end to end. The top cover plate 110, the bottom pad plate 120, and the plurality of wall plates 130 together surround a storage space 140. The bracket 150 is disposed in the storage space 140 to separate the storage space 140 into a plurality of sub-storage spaces 141.

[0159] This embodiment has been mentioned in the above content and will not be described again here.

[0160] In an embodiment of the present application, each of the battery cells 160 is disposed in a sub-storage space 141 , and each of the battery cells 160 is electrically connected to the top cover plate 110 .

[0161] This embodiment has been mentioned in the above content and will not be described again here.

[0162] Please continue reading Fig.13 In one embodiment of the present application, there are multiple electrolyte suction devices 700, and each of the electrolyte suction devices 700 absorbs the electrolyte 190 in one of the sub-storage spaces 141.

[0163] In this embodiment, by arranging a plurality of the electrolyte suction devices 700 in each of the sub-storage spaces 141, when a thermal runaway reaction occurs in part of the sub-storage spaces 141, only the electrolyte 190 in the sub-storage space 141 where the thermal runaway reaction occurs is sucked, and other normal sub-storage spaces 141 are not affected. The lithium-ion battery pack 100 can continue to operate normally, which is flexible and reduces costs.

[0164] Continue reading Fig.15 In one embodiment of the present application, the wall plate 130 is provided with a plurality of openings 138 , and each of the electrolyte suction devices 700 is connected to one of the openings 138 via a transmission pipe 191 .

[0165] Specifically, the electrolyte suction device 700 is connected to the housing 10 through the opening 138 .

[0166] Please continue reading Fig.14 In one embodiment of the present application, the electrolyte suction device 700 includes an electrolyte storage box 710, a capacity detection component 720, a suction device valve 730 and a first pressure pump 740. The electrolyte storage box 710 is connected to the opening 138 through the transmission pipe 191. The capacity detection component 720 is fixedly arranged in the electrolyte storage box 710. The suction device valve 730 is arranged in the transmission pipe 191. The first pressure pump 740 is arranged in the transmission pipe 191. The electrolyte storage box 710 is used to store the electrolyte 190 sucked out from the housing 10. The capacity detection component 720 is used to detect the capacity of the electrolyte 190 stored in the electrolyte storage box 710. The first pressure pump 740 is used to provide power for the electrolyte suction device 700 to suck out the electrolyte 190.

[0167] Specifically, the capacity detection component 720 is used to detect the capacity of the electrolyte 190 stored in the electrolyte storage box 710. A warning light is provided on the surface of the electrolyte storage box 710. When the electrolyte 190 stored in the electrolyte storage box 710 exceeds a preset threshold, the warning light flashes, indicating that the electrolyte storage box 710 needs to be cleaned.

[0168] like Fig.15 As shown, in one embodiment of the present application, the lithium-ion battery pack thermal runaway processing system further includes an electrolyte recovery device 900. The electrolyte recovery device 900 is connected to the multiple electrolyte suction devices 700 through a recovery pipe 192. The electrolyte recovery device 900 is used to collect the electrolyte 190 stored in the multiple electrolyte suction devices 700. The electrolyte recovery device 900 is also electrically connected to the controller 500, and is used to receive control information from the controller 500, and transport the electrolyte 190 stored in the multiple electrolyte suction devices 700 to the electrolyte recovery device 900.

[0169] Specifically, the electrolyte recovery device 900 is a sealed container for collecting the electrolyte 190 sucked from the housing 10 by the electrolyte suction device 700. Since the electrolyte 190 is obtained by suction after the thermal runaway reaction of the lithium-ion battery pack occurs, it is a waste electrolyte. The electrolyte recovery device 900 is used to uniformly recover or store the electrolyte 190 to prevent environmental pollution.

[0170] Please continue reading Fig.15 In one embodiment of the present application, the electrolyte recovery device 900 includes an electrolyte recovery box 910, a recovery device valve 920 and a second pressure pump 930. The electrolyte recovery box 910 is connected to the multiple electrolyte storage boxes 710 through the recovery pipe 192. The recovery device valve 920 is arranged in the recovery pipe 192. The second pressure pump 930 is arranged in the recovery pipe 192. The electrolyte recovery box 910 is used to collect the electrolyte 190 stored in the multiple electrolyte storage boxes 710. The second pressure pump 930 is used to provide power for transferring the electrolyte 190 stored in the electrolyte storage box 710 to the electrolyte recovery box 910.

[0171] In this embodiment, the electrolyte recovery device 900 recovers the electrolyte 190 in the multiple electrolyte storage boxes 710 to the electrolyte recovery box 910 through the joint action of the recovery device valve 920 and the second pressure pump 930, thereby realizing the unified recovery of waste electrolyte after thermal runaway occurs. The electrolyte 190 in multiple electrolyte storage boxes 710 can be recovered at the same time, which is highly efficient and saves manpower and material resources.

[0172] The present application provides a lithium-ion battery pack thermal runaway processing system. The lithium-ion battery pack thermal runaway processing system includes a lithium-ion battery pack 100, an electrolyte suction device 700, a temperature detection device 800 and a controller 500. The lithium-ion battery pack 100 includes a housing 10, a plurality of battery cells 160 disposed in the housing 10, and an electrolyte 190 filled in the housing 10. The electrolyte suction device 700 is connected to the housing 10, and the temperature detection device 800 is fixedly disposed on the inner wall of the housing 10. The thermal runaway processing system for a lithium-ion battery pack provided in the present application, on the one hand, is provided with a temperature detection device 800 on the inner wall of the shell 10 of the lithium-ion battery pack 100, which can monitor the internal temperature of the lithium-ion battery pack 100 in real time, so that after the thermal runaway phenomenon occurs, the monitoring personnel can timely discover the thermal runaway phenomenon and implement a solution based on the internal temperature of the lithium-ion battery pack 100; on the other hand, the shell 10 of the lithium-ion battery pack 100 is connected to the electrolyte suction device 700, and when the thermal runaway phenomenon occurs inside the lithium-ion battery pack 100, the electrolyte 190 inside the shell 10 of the lithium-ion battery pack 100 can be sucked out by the electrolyte suction device 700, so as to prevent the electrolyte 190 inside the lithium-ion battery pack 100 from continuing to react violently, thereby fundamentally cutting off the reaction source of the thermal runaway reaction, and effectively curbing the development of the thermal runaway reaction from inside the lithium-ion battery pack 100.

[0173] The present application also provides a method for handling thermal runaway of a lithium-ion battery pack.

[0174] In one embodiment of the present application, the lithium-ion battery pack thermal runaway processing method includes the following steps S200 to S240:

[0175] S200 , receiving the internal temperature of the housing 10 acquired by the temperature detection device 800 .

[0176] Specifically, the temperature detection device 800 obtains the internal temperature of the housing 10 and sends the internal temperature of the housing 10 to the controller 500 .

[0177] S210, determining whether the internal temperature of the housing 10 is greater than the preset thermal runaway trigger temperature.

[0178] Specifically, after the controller 500 receives the internal temperature of the shell 10, the controller 500 retrieves the preset thermal runaway trigger temperature pre-stored in the monitoring module. The preset thermal runaway trigger temperature is pre-set by the lithium-ion battery pack monitoring personnel. Further, the controller 500 compares the internal temperature of the shell 10 with the value of the preset thermal runaway trigger temperature to determine whether the internal temperature of the shell 10 is greater than the preset thermal runaway trigger temperature.

[0179] S220, if the internal temperature of the shell 10 is greater than the preset thermal runaway trigger temperature, the suction device valve 820 is controlled to open, the first pressure pump 740 is controlled to open, and the electrolyte suction device 700 is controlled to suck the electrolyte 190 in the shell 10 into the electrolyte storage tank 710.

[0180] Specifically, if the internal temperature of the shell 10 is greater than the preset thermal runaway trigger temperature, the controller 500 determines that thermal runaway occurs inside the lithium-ion battery pack 100, controls the first pressure pump 740 to start, and controls the electrolyte suction device 700 to suck the electrolyte 190 in the shell 10 into the electrolyte storage tank 710.

[0181] S240, continue to receive the internal temperature of the shell 10 obtained by the temperature detection device 800 until the internal temperature of the shell 10 is lower than the preset thermal runaway trigger temperature, control the suction device valve 820 and the first pressure pump 740 to close, and control the electrolyte suction device 700 to stop working.

[0182] Specifically, the controller 500 may control the suction power of the electrolyte suction device 700 to speed up the suction work of the electrolyte suction device 700 .

[0183] In this embodiment, the lithium-ion battery pack thermal runaway processing system and method provided by the present application obtains the internal temperature of the shell 10 of the lithium-ion battery pack 100 through the temperature detection device 800, and further, based on the comparison result of the internal temperature of the shell 10 and the preset thermal runaway trigger temperature, controls the electrolyte suction device 700 to suck the electrolyte 190 in the shell 10 into the electrolyte suction device 700, which can effectively prevent the electrolyte 190 in the lithium-ion battery pack 100 from continuing to react, thereby avoiding explosion and fire inside the lithium-ion battery pack 100.

[0184] In one embodiment of the present application, the lithium-ion battery pack thermal runaway processing method includes the following steps S230 to S500:

[0185] S230: If the internal temperature of the housing 10 is not greater than the preset thermal runaway trigger temperature, the suction device valve 720 and the first pressure pump 740 are controlled to be closed.

[0186] Specifically, if the internal temperature of the shell 10 is not greater than the preset thermal runaway trigger temperature, the controller 500 determines that the internal temperature of the lithium-ion battery pack 100 has returned to normal, the thermal runaway phenomenon has been effectively controlled, and the subsequent electrolyte 190 recovery work can be performed.

[0187] S250, receiving the capacity of the electrolyte 190 in the electrolyte storage box 710 obtained by the capacity detection component 720.

[0188] Specifically, an electrolyte measuring component may be provided on the outer surface of the electrolyte storage box 710 , and the electrolyte measuring component is connected to the capacity detection component 720 , so that the maintenance personnel of the lithium-ion battery pack 100 can intuitively know the capacity of the electrolyte 190 in the electrolyte storage box 710 .

[0189] S260, determining whether the capacity of the electrolyte 190 in the electrolyte storage box 710 is greater than a preset electrolyte capacity.

[0190] Specifically, the preset electrolyte capacity is manually set by a maintenance person of the lithium-ion battery pack 100 .

[0191] S270, if the capacity of the electrolyte 190 in the electrolyte storage box 710 is greater than the preset electrolyte capacity, the recovery device valve 920 is controlled to open, the second pressure pump 930 is controlled to open, and the electrolyte recovery device 900 is controlled to suck the electrolyte 190 in the electrolyte storage box 710 into the electrolyte recovery box 910.

[0192] Specifically, if the capacity of the electrolyte 190 in the electrolyte storage box 710 is greater than the preset electrolyte capacity, the controller 500 determines that the capacity of the electrolyte 190 in the electrolyte storage box 710 needs to be recovered, otherwise it will cause the electrolyte 190 to accumulate in the electrolyte storage box 710, affecting subsequent electrolyte suction work.

[0193] S280, continue to receive the capacity of the electrolyte 190 in the electrolyte storage box 710 obtained by the capacity detection component 720, until the capacity of the electrolyte 190 in the electrolyte storage box 710 is less than the preset electrolyte capacity, control the recovery device valve 920 and the second pressure pump 930 to close, and control the electrolyte recovery device 900 to stop working.

[0194] Specifically, if the capacity of the electrolyte 190 in the electrolyte storage box 710 is not greater than the preset electrolyte capacity, the controller 500 determines that the capacity of the electrolyte 190 in the electrolyte storage box 710 is very small, and there is no need to recycle it, and it does not affect the subsequent electrolyte suction work.

[0195] The present application provides a method for handling thermal runaway of a lithium-ion battery pack. On the one hand, the lithium-ion battery handling method obtains the internal temperature of the shell 10 of the lithium-ion battery pack 100 through the temperature detection device 800, and controls the electrolyte suction device 700 to suck the electrolyte 190 in the shell 10 into the electrolyte suction device 700 according to the comparison result of the internal temperature of the shell 10 and the preset thermal runaway trigger temperature, which can effectively prevent the electrolyte 190 in the lithium-ion battery pack 100 from continuing to react and avoid explosion and fire inside the lithium-ion battery pack 100. On the other hand, the electrolyte 190 stored in the electrolyte suction device 700 is recovered to the electrolyte recovery device 900 through the electrolyte recovery device 900, which is convenient for unified recycling and processing, clean and environmentally friendly.

[0196] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0197] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A lithium-ion battery pack thermal runaway processing system, characterized in that: include: A lithium-ion battery pack (100) comprises a housing (10), a plurality of battery cells (160) disposed in the housing (10), and an electrolyte (190) filled in the housing (10); An electrolyte suction device (700) connected to the housing (10); A temperature detection device (800) is fixedly arranged on the inner wall of the shell (10) and is used to detect the internal temperature of the shell (10); as well as a controller (500) electrically connected to the electrolyte suction device (700) and the temperature detection device (800), respectively, and used to control the electrolyte suction device (700) to suck out the electrolyte (190) in the housing (10); The lithium-ion battery pack (100) comprises: A housing (10) comprising a top cover plate (110), a bottom pad plate (120), and a plurality of wall plates (130) connected end to end in sequence, wherein the top cover plate (110), the bottom pad plate (120), and the plurality of wall plates (130) together surround and form a storage space (140); and A bracket (150) is disposed in the storage space (140) and is used to divide the storage space (140) into a plurality of sub-storage spaces (141); Each of the battery cells (160) is arranged in a sub-storage space (141), and each of the wall panels (130) is provided with a window door (131) so that the battery cells (160) can freely enter and exit the shell (10) through the window door (131); a plurality of grooves (111) are arranged on the bottom surface of the top cover plate (110), and the top surface of the bracket (150) is fixedly connected to the top cover plate (110) so that each of the sub-storage spaces (141) has at least two grooves (111), and the positive electrode tab (163) of each of the battery cells (160) is in contact with and connected to one of the grooves (111), and the negative electrode tab (164) of each of the battery cells (160) is in contact with and connected to one of the grooves (111); There are a plurality of electrolyte suction devices (700), and each of the electrolyte suction devices (700) absorbs the electrolyte (190) in one of the sub-storage spaces (141).

2. The lithium-ion battery pack thermal runaway processing system according to claim 1, characterized in that: Each of the battery cells (160) is disposed in a sub-storage space (141), and each of the battery cells (160) is electrically connected to the top cover plate (110).

3. The lithium-ion battery pack thermal runaway processing system according to claim 2, characterized in that: The wall plate (130) is provided with a plurality of openings (138), and each of the electrolyte suction devices (700) is connected to one of the openings (138) via a transmission pipe (191).

4. The lithium-ion battery pack thermal runaway processing system according to claim 3, characterized in that: The electrolyte suction device (700) comprises: an electrolyte storage box (710), connected to the opening (138) via the transmission pipe (191), and used for storing the electrolyte (190) sucked out from the housing (10); a capacity detection component (720), fixedly disposed in the electrolyte storage box (710), and used for detecting the capacity of the electrolyte (190) stored in the electrolyte storage box (710); A suction device valve (730) is disposed on the transmission pipeline (191); and The first pressure pump (740) is arranged in the transmission pipeline (191) and is used to provide power for the electrolyte suction device (700) to suck out the electrolyte (190).

5. The lithium-ion battery pack thermal runaway processing system according to claim 4, characterized in that: Also includes: an electrolyte recovery device (900), connected to the plurality of electrolyte suction devices (700) via a recovery pipe (192), and used for collecting the electrolyte (190) stored in the plurality of electrolyte suction devices (700); The electrolyte recovery device (900) is also electrically connected to the controller (500) and is used to receive control information from the controller (500) and transport the electrolyte (190) stored in the multiple electrolyte suction devices (700) to the electrolyte recovery device (900).

6. The lithium-ion battery pack thermal runaway processing system according to claim 5, characterized in that: The electrolyte recovery device (900) comprises: an electrolyte recovery box (910), connected to the plurality of electrolyte storage boxes (710) via the recovery pipe (192), and used for collecting the electrolyte (190) stored in the plurality of electrolyte storage boxes (710); a recovery device valve (920), disposed on the recovery pipeline (192); and The second pressure pump (930) is disposed in the recovery pipe (192) and is used to provide power for transferring the electrolyte stored in the electrolyte storage tank (710) to the electrolyte recovery tank (910).

7. A method for processing thermal runaway of a lithium-ion battery pack, applied to the thermal runaway processing system of a lithium-ion battery pack according to claim 6, characterized in that: include: receiving the internal temperature of the housing (10) acquired by the temperature detection device (800); Determining whether the internal temperature of the housing (10) is greater than a preset thermal runaway trigger temperature; If the internal temperature of the housing (10) is greater than the preset thermal runaway trigger temperature, the suction device valve (730) is controlled to open, the first pressure pump (740) is controlled to open, and the electrolyte suction device (700) is controlled to suck the electrolyte (190) in the housing (10) into the electrolyte storage tank (710); Continue to receive the internal temperature of the shell (10) acquired by the temperature detection device (800) until the internal temperature of the shell (10) is lower than the preset thermal runaway trigger temperature, control the suction device valve (730) and the first pressure pump (740) to close, and control the electrolyte suction device (700) to stop working; If a thermal runaway reaction occurs in the sub-storage space (141) of the shell (10) where the battery cell (160) is stored, the electrolyte suction device (700) is controlled to suction the electrolyte (190) in the sub-storage space (141) where the thermal runaway reaction occurs, and the battery cell (160) in the sub-storage space (141) where the thermal runaway reaction occurs is moved out of the shell (10) through the window door (131).

8. The method for processing thermal runaway of a lithium-ion battery pack according to claim 7, characterized in that: Also includes: If the internal temperature of the housing (10) is not greater than the preset thermal runaway trigger temperature, controlling the suction device valve (730) and the first pressure pump (740) to be closed; receiving the capacity of the electrolyte (190) in the electrolyte storage box (710) acquired by the capacity detection component (720); Determining whether the capacity of the electrolyte (190) in the electrolyte storage box (710) is greater than a preset electrolyte capacity; If the capacity of the electrolyte (190) in the electrolyte storage box (710) is greater than the preset electrolyte capacity, the recovery device valve (920) is controlled to open, the second pressure pump (930) is controlled to open, and the electrolyte recovery device (900) is controlled to suck the electrolyte (190) in the electrolyte storage box (710) into the electrolyte recovery box (910); Continue to receive the capacity of the electrolyte (190) in the electrolyte storage box (710) obtained by the capacity detection component (720) until the capacity of the electrolyte (190) in the electrolyte storage box (710) is less than the preset electrolyte capacity, control the recovery device valve (920) and the second pressure pump (930) to close, and control the electrolyte recovery device (900) to stop working.

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