Thermal management system and mobile emergency energy storage equipment

Abstract

The utility model provides a thermal management system and mobile emergency energy storage equipment. The thermal management system is used for performing thermal management on a battery pack. The thermal management system comprises a refrigerating device, a heating device and a main control device. The refrigerating device comprises a refrigerating waterway and a cooling-water machine, one end of the refrigerating waterway is connected with the cooling-water machine, and the other end extends to one side of the battery pack and is used for cooling the battery pack; the heating device is arranged on one side of the battery pack and is used for heating the battery pack; the main control device is used for detecting the real-time temperature of the battery pack; the refrigerating device is configured to cool the battery pack under the condition that the real-time temperature is higher than the preset temperature threshold value; the heating device is configured to heat the battery pack under the condition that the real-time temperature is lower than a preset temperature threshold value; in other words, the temperature of the battery pack can be controlled within a proper range through the refrigerating device and the heating device, and the thermal runaway risk of the battery pack and the mobile energy storage equipment can be reduced.

Description

Technical Field

[0001] The present application belongs to the field of mobile emergency energy storage technology, and in particular relates to a thermal management system and a mobile emergency energy storage device. Background Art

[0002] Current mobile energy storage devices are all equipped with power batteries. Mobile energy storage devices can serve as power transfer stations, providing fast and convenient charging services for new energy vehicles. However, their power batteries face the risk of thermal runaway due to various reasons such as short circuit, overcharging, over-discharging, and mechanical damage during the frequent charging and discharging process. If these risks cannot be effectively controlled, they will directly cause serious safety accidents such as fire and explosion, which will not only threaten the safety of vehicles and passengers, but also cause immeasurable damage to the surrounding environment.

[0003] Therefore, how to reduce the risk of thermal runaway of mobile energy storage devices is a problem that those skilled in the art currently need to solve. Utility Model Content

[0004] The purpose of this application is to provide a thermal management system and a mobile emergency energy storage device, aiming to solve the problem of high thermal runaway risk of mobile energy storage devices in traditional technologies.

[0005] A first aspect of an embodiment of the present application provides a thermal management system for thermally managing a battery pack; the thermal management system includes:

[0006] A refrigeration device, comprising a refrigeration water circuit and a chiller, wherein one end of the refrigeration water circuit is connected to the chiller and the other end extends to one side of the battery pack and is used to cool the battery pack;

[0007] a heating device, disposed on one side of the battery pack and used to heat the battery pack;

[0008] A main control device, used to detect the real-time temperature of the battery pack;

[0009] The cooling device is configured to cool the battery pack when the real-time temperature is higher than a preset temperature threshold; the heating device is configured to heat the battery pack when the real-time temperature is lower than a preset temperature threshold.

[0010] In some embodiments of the present application, the refrigeration water circuit includes a first water inlet branch and a second water inlet branch both connected to the chiller, a first water inlet valve is provided on the first water inlet branch, and a second water inlet valve is provided on the second water inlet branch;

[0011] Wherein, the temperature of the refrigerant in the first water inlet branch is lower than the temperature of the refrigerant in the second water inlet branch.

[0012] In some embodiments of the present application, the first water inlet valve is turned on when the real-time temperature is higher than a first temperature, and the second water inlet valve is turned on when the real-time temperature is higher than a second temperature, and the second temperature is set between the first temperature and the preset temperature threshold;

[0013] And / or, the first water inlet valve is turned on when the heating rate of the real-time temperature is greater than the first heating rate, and the second water inlet valve is turned on when the heating rate of the real-time temperature is greater than the second heating rate, and the first heating rate is greater than the second heating rate.

[0014] In some embodiments of the present application, the other end of the cooling water circuit extends to the battery pack and then extends to the chiller to form a cooling loop.

[0015] In some embodiments of the present application, the heating device includes a heating power supply and a heating element. The heating element is arranged close to the battery pack. The heating power supply is electrically connected to the heating element and is used to drive the heating element to generate heat.

[0016] In some embodiments of the present application, the heating device further includes a contactor, which is configured to close when the real-time temperature is lower than a preset temperature threshold.

[0017] In some embodiments of the present application, the thermal management system further includes:

[0018] a first detection unit, configured to detect a first temperature within the battery pack;

[0019] A first fire extinguishing device is provided near the battery pack, and is used for extinguishing a fire in the battery pack when the first temperature is greater than a first safety temperature.

[0020] In some embodiments of the present application, the thermal management system further includes:

[0021] a second detection unit, the second detection unit being configured to detect fire data outside the battery pack, the main control device being configured to output a first control signal according to the fire data;

[0022] The second fire extinguishing device extinguishes the fire of the battery pack according to the first control signal.

[0023] In some embodiments of the present application, the second fire extinguishing device includes a HFC-227ea fire extinguisher; and the second detection unit includes a smoke detector and / or a temperature detector.

[0024] In a second aspect, the present application also provides a mobile emergency energy storage device, including the above-mentioned thermal management system.

[0025] Compared with the prior art, the beneficial effects of the embodiments of the present invention are as follows: the above-mentioned thermal management system and mobile emergency energy storage equipment, the thermal management system is used to perform thermal management on the battery pack; the thermal management system includes a refrigeration device, a heating device and a main control device; the refrigeration device includes a refrigeration water circuit and a chiller, one end of the refrigeration water circuit is connected to the chiller, and the other end extends to one side of the battery pack and is used to cool the battery pack; the heating device is arranged on one side of the battery pack and is used to heat the battery pack; the main control device is used to detect the real-time temperature of the battery pack; the present application is configured to cool the battery pack when the real-time temperature is higher than a preset temperature threshold by setting the refrigeration device; the heating device is configured to heat the battery pack when the real-time temperature is lower than the preset temperature threshold; that is, the temperature of the battery pack can be controlled within an appropriate range by the refrigeration device and the heating device, which is beneficial to reducing the risk of thermal runaway of the battery pack and the mobile energy storage equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the framework structure of a thermal management system provided in one embodiment of the present application;

[0027] Figure 2 A schematic structural diagram of a refrigeration device provided in one embodiment of the present application;

[0028] Figure 3 A schematic diagram of the framework structure of a thermal management system provided in another embodiment of the present application;

[0029] Figure 4 A schematic diagram of the structure of a thermal management system provided in one embodiment of the present application.

[0030] Specific element symbol description: 100-main control device, 200-heating device, 300-battery pack, 400-refrigeration device, 500-first detection unit, 600-first fire extinguishing device, 64-first water inlet valve, 65-second water inlet valve. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0032] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the terms "length", "width", "up", "down", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0035] It is important to know that current mobile energy storage devices are all equipped with power batteries. Mobile energy storage devices can serve as power transfer stations to provide fast and convenient charging services for new energy vehicles. However, their power batteries face the risk of thermal runaway due to various reasons such as short circuit, overcharging, over-discharging, and mechanical damage during frequent charging and discharging. If these risks cannot be effectively controlled, they will directly cause serious safety accidents such as fire and explosion, which will not only threaten the safety of vehicles and passengers, but also cause immeasurable damage to the surrounding environment.

[0036] Specifically, batteries are prone to overheating during use and are also susceptible to continuously releasing excessive amounts of heat due to short circuits, overcharging, over-discharging, and mechanical damage. This can ultimately lead to safety hazards such as fires and explosions during charging, driving, and parking. However, existing mobile energy storage systems typically use passive cooling via natural airflow. This involves keeping all maintenance doors and windows of the container open during operation, allowing natural air convection to dissipate heat generated by the battery pack during charging and discharging. However, this heat dissipation efficiency is very low, further increasing the risk of thermal runaway.

[0037] Therefore, this application improves the relevant thermal management system and mobile emergency energy storage equipment based on this.

[0038] See also Figure 1 , Figure 1The schematic diagram of the framework structure of the thermal management system provided in this embodiment is shown. The thermal management system of this embodiment is used to perform thermal management on the battery pack 300; the thermal management system includes a refrigeration device 400, a heating device 200, and a main control device 100; the refrigeration device 400 includes a refrigeration water circuit and a chiller, one end of the refrigeration water circuit is connected to the chiller, and the other end extends to one side of the battery pack 300, and is used to cool the battery pack 300; the heating device 200 is provided on one side of the battery pack 300 and is used to heat the battery pack 300; the main control device 100 is used to detect the real-time temperature of the battery pack 300; the present application is configured to cool the battery pack 300 when the real-time temperature is higher than a preset temperature threshold by setting the refrigeration device 400; the heating device 200 is configured to heat the battery pack 300 when the real-time temperature is lower than the preset temperature threshold.

[0039] It should be explained that the chiller acts as a cold source, and transports the cooling medium (such as water or coolant) to one side of the battery pack 300 through the cooling water circuit, thereby reducing the temperature of the battery pack 300 through heat exchange. This method can effectively deal with the heat accumulation generated by the battery pack 300 when it is running under high load or the ambient temperature is too high. The heating device 200 is arranged on one side of the battery pack 300. When the ambient temperature is too low or the battery pack 300 needs to be preheated to achieve the best working state, the heating device 200 will start and provide the necessary heat to the battery pack 300 through heat conduction or radiation. The main control device 100 is responsible for detecting the temperature of the battery pack 300 in real time, and judging whether it is necessary to start the cooling or heating device 200 according to the preset temperature threshold.

[0040] It is understood that if the real-time temperature exceeds the preset temperature threshold, the main control device 100 will activate the cooling device 400 to cool the battery pack 300 through the cooling water circuit. If the real-time temperature falls below the preset temperature threshold, the heating device 200 will be activated to heat the battery pack 300 to an appropriate operating temperature. The system automatically adjusts the cooling or heating intensity based on temperature changes to maintain the battery pack 300 within the optimal operating temperature range.

[0041] Currently, most systems only use fans to dissipate heat from the battery pack 300. This not only provides cooling but also fails to heat the battery pack 300, and the heat dissipation efficiency is relatively low. However, in this application, the temperature of the battery pack 300 can be controlled within an appropriate range through the cooling device 400 and the heating device 200, which helps reduce the risk of thermal runaway of the battery pack 300 and the mobile energy storage device.

[0042] In some embodiments, the battery pack 300 may be a battery box, a battery cluster, a battery pack, or a single battery. The thermal management system in this application can perform thermal management on multiple battery packs 300.

[0043] In some embodiments of this application, please refer to Figure 2 , Figure 2 A schematic diagram of the structure of the refrigeration device 400 provided in this embodiment is shown; in which, the refrigerant flows to the battery pack 300 through 66. In this embodiment, the refrigeration water circuit includes a first water inlet branch and a second water inlet branch, both of which are connected to the chiller. A first water inlet valve 64 is provided on the first water inlet branch, and a second water inlet valve 65 is provided on the second water inlet branch. The temperature of the refrigerant in the first water inlet branch is lower than that of the refrigerant in the second water inlet branch.

[0044] It should be explained that since the temperature of the refrigerant in the first water inlet branch is lower than that in the second water inlet branch, the system can selectively open the first water inlet valve 64 or the second water inlet valve 65, or open both at the same time but adjust their flow ratio, according to the actual temperature requirements of the battery pack 300 or the heat distribution in different areas, to achieve more precise temperature control. For example, when the temperature of the battery pack 300 is high, the first water inlet branch can be opened first to quickly lower the temperature; when the temperature approaches the target range, the temperature can be fine-tuned by opening the second water inlet branch or reducing the flow of the first water inlet branch. By distinguishing water inlet branches of different temperatures, the system can meet cooling needs while minimizing energy consumption. When extremely low temperature cooling is not required, the second water inlet branch with a slightly higher temperature can be selected, thereby reducing the energy consumption and operating costs of the chiller.

[0045] In some embodiments of the present application, the first water inlet valve 64 is opened when the real-time temperature is higher than a first temperature, and the second water inlet valve 65 is opened when the real-time temperature is higher than a second temperature, where the second temperature is set between the first temperature and a preset temperature threshold. Alternatively, the first water inlet valve 64 is opened when the real-time temperature rises at a rate greater than a first rate, and the second water inlet valve 65 is opened when the real-time temperature rises at a rate greater than a second rate, where the first rate is greater than the second rate.

[0046] It should be explained that when the real-time temperature is higher than the first temperature, the first water inlet valve 64 is turned on. The first temperature here is usually set as the trigger point for rapid cooling, because the refrigerant temperature in the first water inlet branch is the lowest, which can quickly reduce the temperature of the battery pack 300. When the real-time temperature is higher than the second temperature, the second water inlet valve 65 is turned on. The second temperature is set between the first temperature and the preset temperature threshold, which means that when the temperature of the battery pack 300 rises slightly but has not reached the level of emergency cooling, the system will enable the second water inlet branch for gentle cooling. The preset temperature threshold is the upper limit temperature for safe operation of the battery pack 300.

[0047] In addition to the temperature threshold, the system also considers the real-time temperature rise rate. When the temperature rise rate exceeds the first temperature rise rate, the first water inlet valve 64 is turned on, indicating that the temperature of the battery pack 300 is rising rapidly and strong cooling measures need to be taken immediately. Similarly, when the temperature rise rate exceeds the second temperature rise rate, the second water inlet valve 65 is turned on. However, the first temperature rise rate here is greater than the second temperature rise rate, which means that when the temperature rise rate is fast but has not yet reached an extreme situation, the system will first activate the second water inlet branch for preliminary cooling to slow down the temperature rise trend.

[0048] Specifically, Figure 2 In the figure, 56 represents the water outlet of the battery pack 300, 57 represents the water inlet of the battery pack 300, and 67 represents the communication port between the chiller and the main control device 100. The battery pack 300 experiences a temperature rise during charging and discharging. When the temperature exceeds the reasonable operating temperature range, a liquid cooling cycle is activated. The water inlet and outlet of each battery pack are connected in parallel to the chiller's outlet and inlet manifolds 66 and 62. The chiller has two water outlets (corresponding to the first and second water inlet branches): 'chilled water' and 'cold water'. These are controlled by the first and second water inlet valves 64 and 65. Switching between the 'chilled water' and 'cold water' channels is determined by the magnitude and speed of the temperature rise. Through the chiller's communication port 67, the main monitoring unit can control its power on / off, refrigeration temperature control, and other functions, and monitor its status in real time.

[0049] In some embodiments, the first water inlet valve 64 and / or the second water inlet valve 65 is a solenoid valve.

[0050] In some embodiments of this application, please continue to refer to Figure 2 , Figure 2 The refrigerant in the battery pack 300 flows out to 62 and returns to the chiller. The other end of the cooling water circuit of this embodiment extends to the battery pack 300 and then to the chiller to form a refrigeration circuit.

[0051] In some embodiments of this application, please continue to refer to Figure 2 The heating device 200 of this embodiment includes a heating power supply and a heating element. The heating element is arranged close to the battery pack 300. The heating power supply is electrically connected to the heating element and is used to drive the heating element to generate heat.

[0052] It should be explained that the heating power supply is the core component of the heating device 200, which is responsible for providing electrical energy to drive the heating element to generate heat. It usually has a stable output voltage and current to ensure that the heating element can generate heat evenly and reliably. The heating element is arranged close to the battery pack 300 to ensure that heat can be transferred to the battery pack 300 directly and efficiently. The heating element can be designed to fit the shape of the surface of the battery pack 300 to maximize the heat transfer area. The structure of the heating element can be customized according to the shape and size of the battery pack 300. It can be flat, curved or have a complex shape to adapt to the heating requirements of different battery packs 300.

[0053] Specifically, when the system detects that the real-time temperature of the battery pack 300 is below a preset temperature threshold, the main control device 100 activates the heating device 200. The heating power supply provides electrical energy to the heating element, driving it to generate heat. The heat generated by the heating element is transferred to the battery pack 300 via thermal conduction, gradually increasing its temperature. As the temperature of the battery pack 300 increases, the main control device 100 continuously monitors temperature changes and adjusts the output power of the heating power supply as needed to maintain the battery pack 300 within an appropriate operating temperature range.

[0054] In some embodiments of this application, please continue to refer to Figure 2 , Figure 2 58, 59, 60 and 61 are all contactors. The heating device 200 of this embodiment further includes a contactor, which is configured to close when the real-time temperature is lower than a preset temperature threshold.

[0055] It should be explained that the contactor can safely isolate the heating power supply and the heating element when in the disconnected state, preventing accidental power-on when heating is not required. This isolation function helps to reduce energy consumption, avoid the risk of overheating, and improve the overall safety of the system. By cooperating with the main control device 100, the contactor can accurately control the start and stop of the heating process. When the main control device 100 detects that the real-time temperature is lower than the preset temperature threshold, it will send a signal to close the contactor, thereby starting the heating device 200. Once the temperature reaches or exceeds the preset range, the main control device 100 will send a signal to disconnect the contactor and stop the heating process.

[0056] Specifically, for example, when the battery pack 300 is a lithium battery, the lithium battery is not allowed to be charged and discharged below 0°C. Therefore, the battery must be preheated to a reasonable temperature range before use. Preheating can be performed by switching the charging power supply to the charging gun interface, disconnecting the battery charging and discharging main circuit, and attracting the heating contactor 58-61. Then send the charging demand voltage and current to the charging pile until the temperature of the battery pack 300 rises to a reasonable temperature range: 20~35°C to complete the heating control and perform normal charging operations. The preheating method during discharge is to switch the heating power supply to the battery discharge bus, and attract the heating contactor 58-61 to use the electrical energy of the battery pack 300 to heat the battery pack 300 until the temperature of the battery pack 300 rises to a reasonable temperature range.

[0057] In some embodiments of this application, please refer to Figure 3 , Figure 3 This is a diagram of the thermal management system framework provided in this embodiment. When the battery pack 300 is punctured by external force, subjected to pressure, an electrode short circuit, or subjected to overcharge or over-discharge, the abnormal heat generation rate of the battery exceeds the heat dissipation rate of the battery, leading to explosion and combustion caused by thermal runaway. The thermal management system of this embodiment also includes a first detection unit 500 and a first fire extinguishing device 600; the first detection unit 500 is used to detect a first temperature within the battery pack 300; the first fire extinguishing device 600 is located near the battery pack 300 and is used to extinguish a fire in the battery pack 300 when the first temperature exceeds a first safety temperature. Figure 3 In the figure, 71 is the first fire extinguishing device 600 , and 72 is the first detection unit 500 .

[0058] It should be noted that the first detection unit 500 is specifically designed to detect the first temperature within the battery pack 300, which is one of the key parameters for ensuring the safe operation of the battery pack 300. By monitoring the temperature of the battery pack 300 in real time, potential overheating risks can be promptly detected. The first fire extinguishing device 600 is located near the battery pack 300 to enable rapid response and extinguishing of the fire in the event of a fire. It is typically installed in a location near the battery pack 300 that is easily accessible and does not affect the normal operation of other systems.

[0059] It will be appreciated that the first fire extinguishing device 600 can employ different fire extinguishing methods depending on the characteristics of the battery pack 300 and the type of fire that may occur. For example, for lithium-ion battery fires, commonly used fire extinguishing agents include dry powder, inert gas (such as nitrogen), or specialized fire-extinguishing foam. The fire extinguishing device can be designed to automatically spray or manually trigger. The triggering condition of the first fire extinguishing device 600 is typically related to the temperature detected by the first detection unit 500. When the first temperature exceeds the first safety temperature (i.e., the preset fire risk threshold), the main control device 100 sends a signal to activate the fire extinguishing device. In addition, to prevent false triggering, multiple triggering conditions can be set, such as the continuous temperature rise rate and smoke detection. Through the synergistic effect of the first detection unit 500 and the first fire extinguishing device 600, the thermal management system can monitor the temperature status of the battery pack 300 in real time and quickly implement fire extinguishing measures when an anomaly is detected, thereby effectively preventing the occurrence of fire accidents. This design not only improves system safety but also reduces the risk of loss of life and property caused by fire. At the same time, it also provides strong guarantees for the long-term stable operation of the battery pack 300.

[0060] Specifically, the first detection unit 500 and the first fire extinguishing device 600 provide early warning of fires within the battery pack 300. The first detection unit 500 collects real-time data on free ions released by thermal expansion of the batteries within the battery pack 300 and abnormal temperature rises. When this data reaches the early fire threshold, the first detection unit 500 promptly sends an alarm to the main monitoring unit 45 via the CAN bus. The monitoring system halts all charging and discharging operations and notifies operators through the human-machine interface and related fire sound and light alarms to troubleshoot and address the fault. When the fault area progresses from an early fire to a fire, the first detection unit 500 within the battery pack 300 actively controls the first fire extinguishing device 600 of the power battery within the battery pack 300 to extinguish the fire and notify the monitoring unit to immediately halt all operations and activate the fire sound and light alarm. This effectively limits the fire to within the battery pack 300, preventing further spread.

[0061] In some embodiments of this application, please continue to refer to Figure 3 The thermal management system of this embodiment further includes a second detection unit and a second fire extinguishing device. The second detection unit is configured to detect fire data outside the battery pack 300. The main control device 100 is configured to output a first control signal based on the fire data. The second fire extinguishing device extinguishes the fire in the battery pack 300 based on the first control signal. Reference numeral 70 corresponds to the second detection unit.

[0062] It should be noted that the second detection unit is specifically designed to detect fire data outside the battery pack 300. This data may include smoke density, flame radiation, and a sharp increase in ambient temperature, all of which are obvious signs of a fire. To effectively monitor the environment around the battery pack 300, the second detection unit should be installed near the battery pack 300 but also provide coverage for a wider area. It may include various types of sensors, such as smoke detectors, flame detectors, and infrared thermal imagers.

[0063] In some embodiments, the second fire extinguishing device is also located near the battery pack 300 and may have a wider coverage area than the first fire extinguishing device 600 to respond to fires outside or near the battery pack 300. It can work independently or in conjunction with the first fire extinguishing device 600.

[0064] In some embodiments of the present application, the second fire extinguishing device includes a heptafluoropropane fire extinguisher; and the second detection unit includes a smoke detector and / or a temperature detector.

[0065] Specifically, the first fire extinguishing device 600 and the first detection unit 500 are combined to form a first-level fire alarm system. When the fire cannot be quickly controlled locally and spreads outside the battery box, the fire extinguishing automatic controller 68 of the second-level fire alarm system detects the fire signal through its smoke and temperature sensors 70, and notifies the main monitoring unit 45 through the 485 bus to immediately stop all electrical operations and close all electric shutters of the container to isolate the electrical components inside the container from the outside air. Then, the HFC-227ea fire extinguishing device 69 is started to spray the fire extinguishing agent, quickly exhausting the oxygen in the box and cooling the fire site, completely preventing the further spread of the fire. At the same time, the serious fire sound and light alarm is activated, and the fire rescue number is dialed through the GPRS wireless unit.

[0066] Furthermore, in order to better implement the thermal management system in any of the above embodiments, based on the above thermal management system, the present application also provides a mobile emergency energy storage device, including the above thermal management system.

[0067] In some embodiments, the mobile emergency energy storage device may be a mobile emergency energy storage platform or a charging vehicle.

[0068] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0069] The basic concepts have been described above. It will be apparent to those skilled in the art that the detailed disclosure above is merely illustrative and does not limit the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and amendments to the present application. Such modifications, improvements, and amendments are suggested in the present application and remain within the spirit and scope of the exemplary embodiments of the present application.

[0070] At the same time, this application uses specific terms to describe the embodiments of this application. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that "one embodiment," "an embodiment," or "an alternative embodiment" mentioned twice or multiple times in different locations in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application may be appropriately combined.

[0071] Similarly, it should be noted that, in order to simplify the description of the present disclosure and thus facilitate understanding of one or more utility model embodiments, the foregoing description of the present embodiment sometimes combines multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not mean that the subject matter of the present application requires more features than those recited in the claims. In fact, the features of an embodiment may be fewer than the total features of a single embodiment disclosed above.

[0072] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A thermal management system, characterized in that: The thermal management system is used to perform thermal management on the battery pack; the thermal management system includes: A refrigeration device, comprising a refrigeration water circuit and a chiller, wherein one end of the refrigeration water circuit is connected to the chiller and the other end extends to one side of the battery pack and is used to cool the battery pack; a heating device, disposed on one side of the battery pack and used to heat the battery pack; A main control device, used to detect the real-time temperature of the battery pack; The cooling device is configured to cool the battery pack when the real-time temperature is higher than a preset temperature threshold; the heating device is configured to heat the battery pack when the real-time temperature is lower than a preset temperature threshold.

2. The thermal management system according to claim 1, characterized in that The refrigeration water circuit includes a first water inlet branch and a second water inlet branch both connected to the chiller, the first water inlet branch is provided with a first water inlet valve, and the second water inlet branch is provided with a second water inlet valve; Wherein, the temperature of the refrigerant in the first water inlet branch is lower than the temperature of the refrigerant in the second water inlet branch.

3. The thermal management system according to claim 2, characterized in that: The first water inlet valve is turned on when the real-time temperature is higher than a first temperature, and the second water inlet valve is turned on when the real-time temperature is higher than a second temperature, and the second temperature is set between the first temperature and the preset temperature threshold; And / or, the first water inlet valve is turned on when the heating rate of the real-time temperature is greater than the first heating rate, and the second water inlet valve is turned on when the heating rate of the real-time temperature is greater than the second heating rate, and the first heating rate is greater than the second heating rate.

4. The thermal management system according to any one of claims 1 to 3, characterized in that: The other end of the cooling water circuit extends to the battery pack and then to the chiller to form a cooling loop.

5. The thermal management system according to claim 1, wherein: The heating device includes a heating power supply and a heating element. The heating element is arranged close to the battery pack. The heating power supply is electrically connected to the heating element and is used to drive the heating element to generate heat.

6. The thermal management system according to claim 5, characterized in that: The heating device further includes a contactor configured to close when the real-time temperature is lower than a preset temperature threshold.

7. The thermal management system according to claim 1, wherein: The thermal management system further comprises: a first detection unit, configured to detect a first temperature within the battery pack; A first fire extinguishing device is provided near the battery pack, and is used for extinguishing a fire in the battery pack when the first temperature is greater than a first safety temperature.

8. The thermal management system according to claim 7, characterized in that: The thermal management system further comprises: a second detection unit, the second detection unit being configured to detect fire data outside the battery pack, the main control device being configured to output a first control signal according to the fire data; The second fire extinguishing device extinguishes the fire of the battery pack according to the first control signal.

9. The thermal management system according to claim 8, characterized in that: The second fire extinguishing device includes a heptafluoropropane fire extinguisher; the second detection unit includes a smoke detector and / or a temperature detector.

10. A mobile emergency energy storage device, characterized in that: A thermal management system comprising any one of claims 1 to 9.

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