Management system of battery pack

Abstract

The utility model provides a management system of a battery pack. The management system comprises a circulating pump, a temperature control assembly, a first change-over switch, a heat exchange assembly and a spraying assembly, the heat exchange assembly and the spraying assembly are arranged in the battery pack; the circulating pump communicates with the temperature control assembly and the heat exchange assembly. A first switching port of the first switching switch communicates with the temperature control assembly, a second switching port of the first switching switch communicates with the heat exchange assembly, and a third switching port of the first switching switch communicates with the spraying assembly. The first change-over switch is used for switching between a first conduction state and a second conduction state, the first conduction state comprises conduction between the first switching port and the second switching port, and the second conduction state comprises conduction between the first switching port and the third switching port. On one hand, quick response can be performed for fire extinguishing when a fire disaster occurs; and on the other hand, a special fire extinguishing system does not need to be independently arranged for management, the maintenance cost is effectively saved, and the system size is reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of batteries, and in particular to a management system of a battery pack. BACKGROUND

[0002] Lithium battery technology is widely used in new energy vehicle power batteries and electrochemical energy storage. Specifically, lithium batteries have the advantages of fast charging and discharging speed, high comprehensive efficiency, strong practicality, and few limitations. Compared with other electrochemical energy storage technologies, lithium battery energy storage has great advantages in cycle times, energy density, and response speed.

[0003] However, lithium-ion batteries have the risk of thermal runaway, which can cause economic losses and safety threats. To address this problem, most current management measures are to set up an independent fire extinguishing system, which undoubtedly greatly increases the production and maintenance costs of lithium batteries. CONTENT OF THE INVENTION

[0004] To solve the problem of increased production and maintenance costs of lithium batteries due to the setting of the fire extinguishing system in the prior art, the present disclosure provides a management system of a battery pack.

[0005] The present disclosure provides a management system of a battery pack, which includes a circulating pump, a temperature control assembly, a first switching switch, a heat exchange assembly, and a spraying assembly.

[0006] The heat exchange assembly and the spraying assembly are arranged inside the battery pack.

[0007] The circulating pump is in communication with the temperature control assembly and the heat exchange assembly.

[0008] The first switching port of the first switching switch is in communication with the temperature control assembly, the second switching port is in communication with the heat exchange assembly, and the third switching port is in communication with the spraying assembly.

[0009] The first switching switch is used to switch between a first conduction state and a second conduction state. The first conduction state includes conduction between the first switching port and the second switching port, and the second conduction state includes conduction between the first switching port and the third switching port.

[0010] In some possible embodiments, the management system further includes a controller.

[0011] The controller is electrically connected to the first switching switch, and the controller is used to control the first switching switch to switch between the first conduction state and the second conduction state.

[0012] In some possible embodiments, the management system further includes a first monitoring assembly.

[0013] The first monitoring component is electrically connected to the controller, and is arranged inside the battery pack and configured to send the monitored gas concentration of the battery pack to the controller.

[0014] The controller is configured to control the first switching switch to switch to the first conduction state when the gas concentration is less than or equal to the concentration threshold.

[0015] Alternatively, the controller is configured to control the first switching switch to switch to the second conduction state when the gas concentration is greater than the concentration threshold.

[0016] In some possible embodiments, the management system further includes a second monitoring component.

[0017] The second monitoring component is electrically connected to the controller, and is arranged at a connection between the heat exchange component and the circulating pump and configured to send the monitored temperature output by the heat exchange component to the controller.

[0018] The controller is configured to control the first switching switch to switch to the first conduction state when the temperature is less than or equal to the first temperature threshold.

[0019] Alternatively, the controller is configured to control the first switching switch to switch to the second conduction state when the temperature is greater than the first temperature threshold.

[0020] In some possible embodiments, the controller is further electrically connected to the circulating pump.

[0021] The controller is configured to control the circulating pump to increase the rotating speed when the first switching switch switches to the second conduction state.

[0022] In some possible embodiments, the management system further includes a storage component and a second switching switch.

[0023] The fourth switching port of the second switching switch is connected to the circulating pump, the fifth switching port is connected to the heat exchange component, and the sixth switching port is connected to the storage component.

[0024] The second switching switch is configured to switch between a third conduction state and a fourth conduction state, the third conduction state including conduction between the fourth switching port and the fifth switching port, and the fourth conduction state including conduction between the fourth switching port and the sixth switching port.

[0025] In some possible embodiments, the second switching switch includes a first electromagnetic valve and a second electromagnetic valve.

[0026] The liquid outlet ports of the first electromagnetic valve and the second electromagnetic valve are connected to the circulating pump, the liquid inlet port of the first electromagnetic valve is connected to the liquid outlet port of the heat exchange component, and the liquid inlet port of the second electromagnetic valve is connected to the liquid outlet port of the storage component.

[0027] In some possible embodiments, the temperature control assembly comprises a heat exchanger and a refrigeration sub-assembly;

[0028] The first exchange port of the heat exchanger is in communication with the circulating pump, and the second exchange port of the heat exchanger is in communication with the first switching port of the first switching switch.

[0029] The third exchange port of the heat exchanger is in communication with the liquid outlet port of the refrigeration sub-assembly, and the fourth exchange port of the heat exchanger is in communication with the liquid inlet port of the refrigeration sub-assembly.

[0030] In some possible embodiments, the refrigeration sub-assembly comprises a compressor and a condenser.

[0031] The third exchange port of the heat exchanger is in communication with the liquid outlet port of the compressor, the liquid inlet port of the compressor is in communication with the liquid outlet port of the condenser, and the liquid inlet port of the condenser is in communication with the fourth exchange port of the heat exchanger.

[0032] In some possible embodiments, the temperature control assembly comprises a heater.

[0033] The liquid inlet port of the heater is in communication with the circulating pump, and the liquid outlet port of the heater is in communication with the first switching port of the first switching switch.

[0034] The management system of the battery pack provided by the embodiments of the present disclosure has the following technical effects:

[0035] The heat exchange assembly and the spraying assembly are arranged in the interior of the battery pack, the circulating pump is in communication with the temperature control assembly and the heat exchange assembly, the first switching port of the first switching switch is in communication with the temperature control assembly, the second switching port is in communication with the heat exchange assembly, and the third switching port is in communication with the spraying assembly; the first switching switch is used for switching between the first conduction state and the second conduction state, the first conduction state comprises conduction between the first switching port and the second switching port, and the second conduction state comprises conduction between the first switching port and the third switching port. The first switching switch is used for integrating the heat exchange assembly for heat exchange of the battery pack and the spraying assembly for fire extinguishing of the battery pack. On the one hand, the fire extinguishing can be quickly responded in the case of fire; on the other hand, a special fire extinguishing system does not need to be separately arranged for management, the production and maintenance costs are greatly reduced while the heat exchange and fire extinguishing performance of the system is ensured, the integration degree of the management system is improved, and the volume of the management system is effectively reduced.

[0036] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, and the advantages thereof, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 is a first structural schematic diagram of a battery pack management system provided by an example embodiment of the present disclosure;

[0039] Figure 2 is a partial schematic diagram of a battery pack management system provided by an example embodiment of the present disclosure;

[0040] Figure 3 is a second structural schematic diagram of a battery pack management system provided by an example embodiment of the present disclosure;

[0041] Figure 4 is a partial schematic diagram of a second switch 110 provided by an example embodiment of the present disclosure;

[0042] Figure 5 is a first partial schematic diagram of a temperature control assembly 102 provided by an example embodiment of the present disclosure;

[0043] Figure 6 is a second partial schematic diagram of a temperature control assembly 102 provided by an example embodiment of the present disclosure;

[0044] Figure 7 is a third partial schematic diagram of a temperature control assembly 102 provided by an example embodiment of the present disclosure;

[0045] Figure 8 is a third structural schematic diagram of a battery pack management system provided by an example embodiment of the present disclosure. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative effort belong to the scope of protection of the present disclosure.

[0047] In the description of the present disclosure, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation to the present disclosure.

[0048] In addition, the terms "first", "second" are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0049] In the present disclosure, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0050] In the present disclosure, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0051] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0052] Figure 1 An exemplary embodiment of this disclosure provides a battery pack management system, see [link to relevant documentation]. Figure 1 The management system 10 includes a circulating pump 101, a temperature control component 102, a first switching switch 103, a heat exchange component 104, and a spraying component 105. The circulating pump 101 is connected to both the temperature control component 102 and the heat exchange component 104.

[0053] The heat exchange component 104 and the spraying component 105 are disposed inside the battery pack 20. Specifically, the heat exchange component 104 can be placed close to the battery cells of the battery pack 20 to facilitate heat exchange between the heat exchange component 104 and the battery cells of the battery pack 20; the spraying component 105 can be disposed between the battery cells to facilitate fire extinguishing by the spraying component 105. It is not limited to this and can be selected according to actual needs.

[0054] The first switching port 1031 of the first switching switch 103 is connected to the temperature control component 102, the second switching port 1032 is connected to the heat exchange component 104, and the third switching port 1033 is connected to the spraying component 105. The first switching switch 103 may include a combination of a three-way ball valve, a three-way valve, and a solenoid valve, or multiple solenoid valves, which can be selected according to the actual situation.

[0055] The first switching switch 103 is used to switch between a first conducting state and a second conducting state. The first conducting state includes conducting between the first switching port 1031 and the second switching port 1032, and the second conducting state includes conducting between the first switching port 1031 and the third switching port 1033.

[0056] The battery pack management system provided in this embodiment has two operating modes: a heat exchange mode and a fire suppression mode. The system can switch between these modes based on the different conduction states of the first switching switch 103. Specifically:

[0057] When the first switching port 1031 and the second switching port 1032 of the first switching switch 103 are connected, a circulation loop is formed among the circulation pump 101, the temperature control assembly 102 and the heat exchange assembly 104, and the circulation loop contains the circulation medium.

[0058] In the embodiment, the heat exchange assembly 104 can include but is not limited to one or more of the following: heat exchange plates, heat pipes, liquid cooling channels, micro-channel heat exchangers, etc. Taking the heat exchange plates as an example, the heat exchange plates are made of metal materials (such as aluminum or copper) and have internal flow channels for circulation of the circulation medium. When the battery cells of the battery pack 20 need to be cooled, the circulation medium flows in the channels and absorbs the heat of the battery cells to prevent the battery pack 20 from overheating; when the battery cells of the battery pack 20 need to be heated, the circulation medium flows in the channels and provides heat to the battery cells. Under the action of the circulation pump 101, the circulation medium is temperature-controlled by the temperature control assembly 102 and returns to the heat exchange assembly 104 to continue heat exchange after reaching the required temperature for heat exchange.

[0059] When the first switching port 1031 and the third switching port 1033 of the first switching switch 103 are connected, a fire extinguishing branch is formed from the circulation pump 101, the temperature control assembly 102 to the spraying assembly 105, and the circulation medium originally used for heat exchange circulation in the circulation loop will be used to extinguish the fire of the battery pack 20.

[0060] Generally, the first switching switch 103 remains in the first conduction state and only switches to the second conduction state when fire extinguishing is needed.

[0061] In the embodiment, the spraying assembly 105 can include but is not limited to one or more of the following: nozzles, sprayers, spraying pipelines and spraying holes provided on the spraying pipelines, etc., and can be selected according to actual conditions. In the fire extinguishing mode, the spraying assembly 105 achieves the effect of suppressing the fire by distributing the circulation medium to the fire source position.

[0062] Regarding the selection of the circulation medium, in addition to the requirement that the circulation medium has thermal conductivity, it is also required to have good flame retardancy. For example, the circulation medium can include but is not limited to one or more of the following: silicone oil, modified water-based coolant, fluorine-containing coolant and organic phosphate-based coolant, etc., and can be selected according to actual needs.

[0063] As to other components in the management system provided by the embodiment, the circulating pump 101 is configured to circulate the circulating medium in the management system by forced flow in the heat exchange mode, to ensure that the circulating medium can flow continuously between the heat exchange assembly 104 and the temperature control assembly 102 to exchange heat with the battery pack 20; and in the fire extinguishing mode, to drive the circulating medium to be output from the spraying assembly 105 and to extinguish the fire of the battery pack 20. The temperature control assembly 102 is configured to heat the circulating medium when the temperature of the battery pack 20 is too low, and to cool the circulating medium when the temperature of the battery pack 20 is too high; and the circulating medium exchanges heat with the battery pack 20 in the heat exchange assembly 104 to make the battery pack 20 reach a suitable working temperature.

[0064] In the embodiment, the heat exchange assembly for heat exchange with the battery pack and the spraying assembly for extinguishing the fire of the battery pack are integrated by the first switch. On one hand, the fire can be quickly extinguished when the fire occurs; on the other hand, a separate fire extinguishing system does not need to be arranged for management, thereby effectively saving the maintenance cost and reducing the system volume.

[0065] In some possible embodiments, referring to Figure 2 , the management system further comprises a controller 106. The controller 106 is electrically connected with the first switch 103, and the first switch 103 is controlled by the controller 106 to switch between the first conduction state and the second conduction state.

[0066] In addition to being manually switched by the management personnel, the first switch 103 can also be switched according to the state of the battery pack. For example, when the state of the battery pack indicates that the battery pack is in a normal working state, the first switch 103 is controlled to be in the first conduction state; and when the state of the battery pack indicates that the battery pack is in a fire or a fire precursor, the first switch 103 is controlled to be in the second conduction state to extinguish the fire. Specifically,

[0067] In a specific embodiment, the management system can further comprise a first monitoring assembly 107. The first monitoring assembly 107 is electrically connected with the controller 106, and the first monitoring assembly 107 is arranged in the interior of the battery pack 20. The first monitoring assembly 107 can be configured to send the monitored gas concentration of the battery pack 20 to the controller 106.

[0068] The controller 106 is configured to control the first switch 103 to switch to the first conduction state when the gas concentration is less than or equal to a concentration threshold; or the controller 106 is configured to control the first switch 103 to switch to the second conduction state when the gas concentration is greater than the concentration threshold.

[0069] The gas concentration can be, but is not limited to, carbon monoxide concentration, volatile organic compound concentration (VOCs), etc., and can be selected according to the type of the battery pack. When a fire occurs, it is usually accompanied by the generation of multiple gases. By monitoring the concentration changes of these gases, the fire monitoring system can provide real-time early warning, especially in the early stages of fire, when some toxic gases (such as carbon monoxide, carbon dioxide, VOCs) are released first. Different gas monitoring sensors can help us discover and take effective measures in the early stages of battery thermal runaway to prevent the fire from spreading or spreading.

[0070] In addition, the first monitoring component 107 can monitor pressure, temperature, etc. For example, the controller 106 is configured to control the first switching switch 103 to switch to the first conduction state when the pressure is less than or equal to a pressure threshold; or the controller 106 is configured to control the first switching switch 103 to switch to the second conduction state when the pressure is greater than the pressure threshold. The pressure threshold can be set according to specific conditions, which is not particularly limited here.

[0071] When a fire or thermal runaway occurs in the battery, the internal chemical reaction will cause violent gas release and temperature rise, resulting in a significant increase in pressure in the battery pack. Therefore, monitoring the pressure change in the battery pack 20 can provide a fire warning to help take fire extinguishing or control measures in advance.

[0072] In summary, the first monitoring component 107 can be a single type of monitoring component or a composite type of monitoring component. When the first monitoring component 107 is a composite type of monitoring component, it can construct a fire monitoring network according to temperature, pressure, gas concentration, etc. and achieve all-around, multi-dimensional monitoring of the state of the battery pack. At the same time, the controller can train according to the feedback of temperature, pressure, gas concentration, etc. to construct a thermal runaway prediction model (or a fire prediction model) to accurately predict the thermal runaway risk of the battery pack.

[0073] Through the first monitoring component 107 and the second monitoring component 108, early warning of thermal runaway can be achieved, and the controller 106 can respond quickly to control the first switching switch 103 to switch to the first conduction state to extinguish the fire of the battery pack 20, thereby significantly reducing the risk of fire.

[0074] In a specific embodiment, the management system can further include a second monitoring component 108. The second monitoring component 108 is electrically connected to the controller 106, and the second monitoring component 108 is arranged at the connection between the heat exchange component 104 and the circulating pump 101. The second monitoring component 104 is configured to send the monitored temperature output by the heat exchange component 104 to the controller 106.

[0075] The controller 106 is configured to control the first switching switch 103 to switch to the first conduction state when the temperature is less than or equal to the first temperature threshold, or the controller 106 is configured to control the first switching switch 103 to switch to the second conduction state when the temperature is greater than the first temperature threshold.

[0076] The first temperature threshold can be set according to specific conditions, and the second monitoring component 108 can include a temperature sensor, which is specifically configured to monitor the temperature of the circulating medium output by the heat exchange component 104. During the heat exchange process of the heat exchange component 104, when the battery pack is in thermal runaway or is about to be in thermal runaway, the temperature in the battery pack 20 will rise sharply, and at this time, the temperature of the circulating medium after the heat exchange of the heat exchange component 104 will also rise. Therefore, by monitoring the temperature output by the second monitoring component 108, the thermal runaway of the battery pack 20 can be timely responded to, the first switching switch 103 can be controlled to switch to the second conduction state to extinguish the fire, reduce the expansion of the fire influence of the battery pack 20, and improve the safety performance of the system.

[0077] In a specific embodiment, the first monitoring component 107 and the second monitoring component 108 can be used in combination, and specific embodiments can be referred to the above two embodiments. By combining multiple monitoring angles, efficient and safe operation under any working condition can be ensured, false positives and excessive responses can be reduced, and battery thermal runaway can be detected earlier.

[0078] In some possible embodiments, the controller 106 is also electrically connected with the circulating pump 101, and the controller 106 adjusts the rotating speed of the circulating pump 101 according to the state of the battery pack or the management system. Specifically:

[0079] In a specific embodiment, the controller 106 is configured to control the circulating pump 101 to increase the rotating speed when the first switching switch 103 switches to the second conduction state.

[0080] Specifically, the rotating speed of the motor of the circulating pump 101 or the speed regulating device built in the circulating pump 101 can be adjusted. By increasing the rotating speed of the circulating pump 101, the flow rate of the circulating medium in the management system can be increased, and fire prevention and control can be performed in time.

[0081] In an embodiment, the controller 106 can also adjust the rotating speed of the circulating pump 101 according to the information fed back by the first monitoring component 107 and / or the second monitoring component 108. For example, when the temperature fed back by the second monitoring component 108 is greater than a second temperature threshold, the controller 106 can control the circulating pump 101 to increase the rotating speed, where the second temperature threshold is less than the first temperature threshold, and the second temperature threshold can be set according to specific conditions, which is not particularly limited herein. In this embodiment, even if the temperature fed back by the second monitoring component 108 at this time does not represent that the battery pack has a fire, the rotating speed of the circulating pump 101 can be appropriately increased to accelerate the circulating speed of the circulating medium in the management system, thereby improving the cooling speed of the battery pack 20.

[0082] In some possible embodiments, referring to Figure 3 , the management system further comprises a storage component 109 and a second switching switch 110.

[0083] The second switching switch 110 can include a three-way ball valve, a combination of a three-way valve and a solenoid valve, or a plurality of solenoid valves. The storage component 109 stores the circulating medium. The fourth switching port 1101 of the second switching switch 110 is connected to the circulating pump 106, the fifth switching port 1102 is connected to the heat exchange component 104, and the sixth switching port 1103 is connected to the storage component 109.

[0084] The second switching switch 110 is used to switch between a third conduction state and a fourth conduction state. The third conduction state includes that the fourth switching port 1101 and the fifth switching port 1102 are conducted, and the fourth conduction state includes that the fourth switching port 1101 and the sixth switching port 1103 are conducted.

[0085] When the second switching switch 110 is in the third conduction state, the circulating medium stored in the storage component 109 can be controlled to stop flowing to the circulating pump 101; when the second switching switch 110 is in the fourth conduction state, the circulating medium stored in the storage component 109 can be controlled to flow to the circulating pump 101 to achieve the supplement of the circulating medium in the management system.

[0086] Generally, the second switch 110 keeps the third conduction state, and switches to the fourth conduction state only when the circulating medium needs to be supplemented. For example, during the initialization phase of the management system, the second switch 110 switches to the fourth conduction state, and the circulating medium in the storage assembly 109 flows to the circulating pump 101 through the second switch 110, and when the circulating loop contains sufficient circulating medium, the second switch 110 switches to the third conduction state, and the storage assembly 109 stops delivering the circulating medium; or when the first switch 103 switches to the second conduction state, at this time the management system is in the fire extinguishing mode, the second switch 110 can be switched to the fourth conduction state synchronously, and the circulating medium in the storage assembly 109 flows to the circulating pump 101 through the second switch 110 to provide sufficient circulating medium for fire extinguishing.

[0087] Referring to Figure 4 , the following will be described by taking a plurality of electromagnetic valves as an example:

[0088] The second switch 110 includes a first electromagnetic valve 1104 and a second electromagnetic valve 1105. The outlet port of the first electromagnetic valve 1104 and the outlet port of the second electromagnetic valve 1105 are connected in communication with the circulating pump 101, the inlet port of the first electromagnetic valve 1104 is connected in communication with the heat exchange assembly 104, and the inlet port 1106 of the second electromagnetic valve 1105 is connected in communication with the storage assembly 109.

[0089] Among them, the outlet port of the first electromagnetic valve 1104 and the outlet port of the second electromagnetic valve 1105 correspond to the fourth switch port 1101, the inlet port of the first electromagnetic valve 1104 corresponds to the fifth switch port 1102, and the inlet port of the second electromagnetic valve 1105 corresponds to the sixth switch port 1103.

[0090] In the third conduction state, the first electromagnetic valve 1104 is controlled to be opened, and the second electromagnetic valve 1105 is controlled to be closed; in the fourth conduction state, the first electromagnetic valve 1104 is controlled to be closed, and the second electromagnetic valve 1105 is controlled to be opened.

[0091] In some possible embodiments, the temperature control assembly 102 can be in a refrigeration mode and a heating mode, which are selected according to the state of the battery pack 20.

[0092] In the refrigeration mode, referring to Figure 5 , the temperature control assembly 102 includes a heat exchanger 1021 and a refrigeration subassembly.

[0093] The first exchange port of the heat exchanger 1021 is connected to the circulating pump 101, and the second exchange port of the heat exchanger 1021 is connected to the first switching port 1031 of the first switching switch 103. The third exchange port of the heat exchanger 1021 is connected to the liquid outlet port of the refrigeration subassembly, and the fourth exchange port of the heat exchanger 1021 is connected to the liquid inlet port of the refrigeration subassembly.

[0094] Inside the heat exchanger 1021, there are a first channel from the first exchange port to the second exchange port, and a second channel from the third exchange port to the fourth exchange port, and the first channel and the second channel exchange heat through the channel wall. The circulating medium flows into the first channel, and the condensed medium output by the refrigeration subassembly flows into the second channel, and the heat between the condensed medium and the circulating medium is exchanged through the channel wall, so that the temperature of the circulating medium is reduced.

[0095] Specifically, the refrigeration subassembly includes a compressor 1022 and a condenser 1023. The third exchange port of the heat exchanger 1021 is connected to the liquid outlet port of the compressor 1022, the liquid inlet port of the compressor 1022 is connected to the liquid outlet port of the condenser 1023, and the liquid inlet port of the condenser 1023 is connected to the fourth exchange port of the heat exchanger 1021.

[0096] The refrigeration mode is described in detail below: the gaseous refrigerant enters the compressor 1022, and after being processed by the compressor 1022, its pressure and temperature are significantly increased. The high-pressure and high-temperature refrigerant then enters the condenser 1023, which is no longer in contact with outdoor air. Inside the condenser 1023, the refrigerant exchanges heat through the pipeline, releases the heat it carries, and quickly condenses into condensed medium, which enters the heat exchanger 1021 for heat exchange and temperature reduction.

[0097] In the heating mode, referring to Figure 6 The temperature control assembly includes a heater 1024.

[0098] The liquid inlet port of the heater 1024 is connected to the circulating pump 101, and the liquid outlet port of the heater 1024 is connected to the first switching port of the first switching switch 103.

[0099] After the circulating medium enters the heater 1024, the heater 1024 starts the heating mode, so that the temperature of the circulating medium is increased.

[0100] In some use scenarios, referring to Figure 7 The temperature control assembly 102 can only contain the refrigeration mode or the heating mode, or both the refrigeration mode and the heating mode.

[0101] When the temperature control assembly 102 contains both the refrigeration mode and the heating mode, the heater 1024 is connected between the first exchange port of the heat exchanger 1021 and the circulating pump 101. When the temperature control assembly 102 is in the refrigeration mode, the heater 1024 stops working; when the temperature control assembly 102 is in the heating mode, the heat exchanger 1021, the compressor 1022, and the condenser 1023 stop working.

[0102] In addition, the temperature control assembly 102 can also be electrically connected with the controller 106, and the controller 106 can control the temperature control assembly 102 to switch between the refrigeration mode and the heating mode according to the temperature of the battery pack 20.

[0103] For the convenience of understanding, the heat exchange mode and the fire extinguishing mode in the present embodiment are described in detail through a specific embodiment: Figure 8

[0104] The heat exchange mode: the circulating pump 101 is initialized, the second switch 110 is switched to the fourth conduction state, the circulating medium in the storage assembly 109 enters the circulating pump 101, and after balancing in the pipe network, the second switch 110 is switched to the third conduction state; the circulating pump 101 works, the circulating medium passes through the heater 1024 and the heat exchanger 1021, and after heat exchange, enters the first switch 103, at this time, the first switch 103 is in the first conduction state. Then enter the heat exchange assembly 104, the circulating medium is heat exchanged in the battery pack 20 and then flows back to the circulating pump through the second switch 110. The controller 106 acquires the gas concentration and temperature collected by the first monitoring assembly 107 and the second monitoring assembly 108, and adjusts the rotating speed of the circulating pump 101 according to the gas concentration and temperature, realizes on-demand cooling, improves energy efficiency, and precisely adjusts the temperature of the battery cabin heat management, so as to ensure that the battery temperature is in a suitable range.

[0105] The controller 106 acquires the gas concentration and temperature collected by the first monitoring assembly 107 and the second monitoring assembly 108, and the controller 106 judges that the battery pack 20 has thermal runaway, controls the first switch 103 to switch to the second conduction state, the second switch 110 to switch to the fourth conduction state, and the circulating pump 101 to increase the rotating speed. The circulating medium in the storage assembly 109 enters the circulating pump 101, reaches the spraying assembly 105 through the pipe network, and implements fire extinguishing.

[0106] It should be noted that the above-mentioned sequence of the embodiments of the present disclosure is only for description, and does not represent the advantages and disadvantages of the embodiments. The above describes specific embodiments of the present disclosure. Other embodiments are within the scope of the appended claims.

[0107] ​The above merely provides the preferred embodiment of the present disclosure and not intended to limit the present disclosure. Accordingly, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall fall within the protection scope of the present disclosure.

Claims

1. A battery pack management system, characterized by, The management system comprises a circulating pump (101), a temperature control assembly (102), a first switch (103), a heat exchange assembly (104) and a spraying assembly (105); The heat exchange assembly (104) and the spraying assembly (105) are arranged in the interior of the battery pack; The circulating pump (101) is in communication with the temperature control assembly (102) and the heat exchange assembly (104) respectively; The first switch (103) is in communication with the temperature control assembly (102) through a first switch port (1031), in communication with the heat exchange assembly (104) through a second switch port, and in communication with the spraying assembly (105) through a third switch port; The first switch (103) is used for switching between a first conduction state and a second conduction state, the first conduction state comprising conduction between the first switch port (1031) and the second switch port, and the second conduction state comprising conduction between the first switch port (1031) and the third switch port.

2. The management system of claim 1, wherein, The management system further comprises a controller (106); The controller (106) is electrically connected with the first switch (103), and is used for controlling the first switch (103) to switch between the first conduction state and the second conduction state.

3. The management system of claim 2, wherein, The management system further comprises a first monitoring assembly (107); The first monitoring assembly (107) is electrically connected with the controller (106), is arranged in the interior of the battery pack, and is used for sending a monitored gas concentration of the battery pack to the controller (106); The controller (106) is used for controlling the first switch (103) to switch to the first conduction state when the gas concentration is less than or equal to a concentration threshold value; Or, the controller (106) is used for controlling the first switch (103) to switch to the second conduction state when the gas concentration is greater than the concentration threshold value.

4. The management system of claim 2, wherein, The management system further comprises a second monitoring assembly (108); The second monitoring assembly (108) is electrically connected with the controller (106), is arranged at a connection between the heat exchange assembly (104) and the circulating pump (101), and is used for sending a monitored temperature output by the heat exchange assembly (104) to the controller (106); The controller (106) is used for controlling the first switch (103) to switch to the first conduction state when the temperature is less than or equal to a first temperature threshold value; Or, the controller (106) is used for controlling the first switch (103) to switch to the second conduction state when the temperature is greater than the first temperature threshold value.

5. The management system of claim 2, wherein, The controller (106) is further electrically connected with the circulating pump (101); The controller (106) is used for controlling the circulating pump (101) to increase the rotating speed when the first switch (103) switches to the second conduction state.

6. The management system of claim 1, wherein, The management system further comprises a storage component (109) and a second switch (110); The fourth switch port (1101) of the second switch (110) is connected with the circulating pump (101), the fifth switch port (1102) is connected with the heat exchange component (104), and the sixth switch port (1103) is connected with the storage component (109); The second switch (110) is used for switching between a third conduction state and a fourth conduction state, the third conduction state includes that the fourth switch port (1101) is conducted with the fifth switch port (1102), and the fourth conduction state includes that the fourth switch port (1101) is conducted with the sixth switch port (1103).

7. The management system of claim 6, wherein, The second switch (110) comprises a first electromagnetic valve (1104) and a second electromagnetic valve (1105); The liquid outlet port of the first electromagnetic valve (1104) and the liquid outlet port of the second electromagnetic valve (1105) are connected with the circulating pump (101), the liquid inlet port of the first electromagnetic valve (1104) is connected with the liquid outlet port of the heat exchange component (104), and the liquid inlet port of the second electromagnetic valve (1105) is connected with the liquid outlet port of the storage component (109).

8. The management system of claim 1, wherein, The temperature control component (102) comprises a heat exchanger (1021) and a refrigeration sub-component; The first exchange port of the heat exchanger (1021) is connected with the circulating pump (101), and the second exchange port of the heat exchanger (1021) is connected with the first switch port (1031) of the first switch (103); The third exchange port of the heat exchanger (1021) is connected with the liquid outlet port of the refrigeration sub-component, and the fourth exchange port of the heat exchanger (1021) is connected with the liquid inlet port of the refrigeration sub-component.

9. The management system of claim 8, wherein, The refrigeration sub-component comprises a compressor (1022) and a condenser (1023); The third exchange port of the heat exchanger (1021) is connected with the liquid outlet port of the compressor (1022), the liquid inlet port of the compressor (1022) is connected with the liquid outlet port of the condenser (1023), and the liquid inlet port of the condenser (1023) is connected with the fourth exchange port of the heat exchanger (1021).

10. The management system of claim 1, wherein, The temperature control component (102) comprises a heater (1024); The liquid inlet port of the heater (1024) is connected with the circulating pump (101), and the liquid outlet port of the heater (1024) is connected with the first switch port (1031) of the first switch (103).

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