阅读说明：本技术 汽车电池的温控系统 (Temperature control system of automobile battery ) 是由 亓新亮 于 2019-09-23 设计创作，主要内容包括：本申请公开了一种汽车电池的温控系统。该温控系统包括：制冷装置、加热装置和控制装置；控制装置分别与制冷装置和加热装置电连接,制冷装置和加热装置均用于与汽车电池相连通,并供导热介质流动而调整导热介质的温度；基于汽车状态信号以及汽车电池的温度信号,控制装置控制制冷装置和/或加热装置,以通过导热介质的热传导而调整汽车电池的温度；其中,汽车状态信号包括：充电模式和行驶模式。(The application discloses temperature control system of car battery. This temperature control system includes: the device comprises a refrigerating device, a heating device and a control device; the control device is respectively electrically connected with the refrigerating device and the heating device, and the refrigerating device and the heating device are both used for being communicated with the automobile battery and allowing the heat-conducting medium to flow so as to adjust the temperature of the heat-conducting medium; based on the automobile state signal and the temperature signal of the automobile battery, the control device controls the refrigerating device and/or the heating device to adjust the temperature of the automobile battery through heat conduction of the heat-conducting medium; wherein, the car status signal includes: a charging mode and a travel mode.)

1. A temperature control system for a vehicle battery, comprising: the device comprises a refrigerating device, a heating device and a control device;

the control device is respectively electrically connected with the refrigerating device and the heating device, and the refrigerating device and the heating device are both used for being communicated with an automobile battery and supplying a heat-conducting medium to flow so as to adjust the temperature of the heat-conducting medium;

based on the vehicle state signal and the temperature signal of the vehicle battery, the control device controls the cooling device and/or the heating device to adjust the temperature of the vehicle battery through heat conduction of the heat-conducting medium; wherein the vehicle status signal comprises: a charging mode and a travel mode.

2. The temperature control system for the vehicle battery according to claim 1, wherein the control device comprises: a first controller and a second controller; the refrigerating apparatus includes: the system comprises a compressor, a condenser, a refrigeration expansion valve, an evaporator, a refrigeration exchanger and a battery expansion valve;

the compressor, the condenser, the refrigeration expansion valve and the evaporator are sequentially connected to form a refrigeration loop; one end of the battery expansion valve is connected between the condenser and the refrigeration expansion valve, the other end of the battery expansion valve is connected with the refrigeration exchanger, and one end of the refrigeration exchanger, which is far away from the battery expansion valve, is connected between the evaporator and the compressor and is communicated with the automobile battery; the heat-conducting medium enters the cooling loop through the refrigeration exchanger so as to reduce the temperature of the heat-conducting medium;

based on the automobile state signal, the temperature signal of the automobile battery and the feedback signal of the second controller, the first controller controls the opening degree of the refrigeration expansion valve and controls the rotating speeds of the compressor and the fan of the condenser, and outputs a first control signal; the second controller receives the state signal of the refrigerating device and the first control signal so as to control the rotating speed of a fan of the evaporator.

3. The temperature control system for a vehicle battery according to claim 2, wherein the control device further comprises: a third controller; the heating device includes: a heating water pump, a heater and a heating exchanger;

the heating water pump, the heater and the heating exchanger are sequentially communicated to form a heating loop, and the heating exchanger is communicated with the automobile battery; the heat-conducting medium enters the heating loop through the heating exchanger so as to increase the temperature of the heat-conducting medium;

the first controller controls the start and stop of the heater and outputs a second control signal based on the received automobile state signal, the temperature signal of the automobile battery and the feedback signal of the third controller; and the third controller receives the state signal of the heating device and the second control signal so as to control the rotating speed of the heating water pump.

4. The temperature control system for a vehicle battery according to claim 3, further comprising: the cooling water pump is arranged between the cooling exchanger and the automobile battery; the third controller is electrically connected with the cooling water pump to control the rotating speed of the cooling water pump.

5. The temperature control system for a vehicle battery according to claim 4, wherein when the vehicle is in a charging mode or a driving mode, the cooling device is turned off, and the temperature of the vehicle battery is greater than or equal to 40 ℃, the first controller controls a fan of the condenser to be started, the third controller controls the cooling water pump to be started, and then the first controller controls the battery expansion valve and the compressor to be started, so that the heat conducting medium takes away heat from the vehicle battery.

6. The temperature control system for a vehicle battery according to claim 4, wherein when the vehicle is in a charging mode or a driving mode, the cooling device is turned on, and the temperature of the vehicle battery is greater than or equal to 35 ℃, the first controller controls a fan of the condenser to be started, the third controller controls the cooling water pump to be started, and then the first controller controls the cooling expansion valve, the battery expansion valve and the compressor to be started, so that the heat transfer medium takes away heat of the vehicle battery.

7. The temperature control system for the vehicle battery according to claim 4, wherein when the first controller determines that the temperature difference between different positions of the vehicle battery is greater than or equal to 10 ℃, the third controller controls the cooling water pump to be repeatedly turned on for 40s to 120s and turned off for 240s to 360 s; and the third controller controls the cooling water pump to be closed until the temperature difference of different positions of the automobile battery is less than or equal to 6 ℃.

8. The temperature control system for a vehicle battery according to claim 3, wherein when the first controller determines that the vehicle is in a charging mode or charging is completed and the temperature of the vehicle battery is less than or equal to 5 ℃, the third controller controls the heating water pump to be activated, and then the first controller controls the heater to be turned on and the third controller controls the cooling water pump to be activated to increase the temperature of the vehicle battery.

9. The temperature control system for a vehicle battery as defined in claim 1, further comprising: a battery temperature sensor and a water temperature sensor;

the battery temperature sensor is used for acquiring the temperature of the automobile battery, and the water temperature sensor is used for acquiring the temperature of the heat-conducting medium and feeding back the temperature signals to the control device in the forms of the temperature signal of the automobile battery and the temperature signal of the heat-conducting medium respectively;

the control device is used for controlling the heating device to start when the temperature of the automobile battery is less than or equal to 5 ℃ and the temperature difference between the automobile battery and the heat-conducting medium is less than or equal to 8-12 ℃; and controlling the heating device to be turned off when the temperature of the automobile battery is greater than or equal to 10 ℃.

10. The temperature control system for a vehicle battery according to claim 8, wherein the control device controls the water temperature sensor to acquire the temperature of the heat transfer medium every predetermined time;

when the difference value between the maximum temperature and the minimum temperature acquired by the heat-conducting medium at adjacent time or the same time is greater than or equal to 15 ℃, the control device discards the maximum temperature and the minimum temperature and controls the water temperature sensor to acquire the temperature of the heat-conducting medium again after 4-10 s.

Technical Field

The application relates to the technical field of automobiles, in particular to a temperature control system of an automobile battery.

Background

At present, the safety of new energy vehicles is more and more emphasized by consumers, wherein the core power of the new energy vehicles is the batteries of the vehicles, and the safety of the batteries of the vehicles directly determines the safety of the new energy vehicles. At present, the battery core can generate chemical heat and joule heat in the use process of the battery, so that the temperature of the battery core is overhigh. The battery core temperature is too high, the thermal runaway of the automobile battery can be caused, and the automobile battery can be ignited and exploded in severe cases.

When the automobile battery is charged at low temperature, the charging is slow or the charging is obstructed due to too low temperature, the automobile battery can generate irreversible damage, and the short circuit of the anode and the cathode of the automobile battery can be caused in serious conditions, so that the service life and the safety of the automobile battery are influenced. Therefore, it is necessary to control the temperature of the car battery within a reasonable range to avoid the danger of high temperature thermal runaway and low temperature charging.

Disclosure of Invention

An object of the application is to provide a temperature control system of car battery to solve current car battery and appear high temperature thermal runaway and the dangerous problem of low temperature charging.

In order to solve the technical problem, the application provides a temperature control system of an automobile battery. This temperature control system of car battery includes: the device comprises a refrigerating device, a heating device and a control device; the control device is respectively electrically connected with the refrigerating device and the heating device, and the refrigerating device and the heating device are both used for being communicated with an automobile battery and supplying a heat-conducting medium to flow so as to adjust the temperature of the heat-conducting medium; based on the vehicle state signal and the temperature signal of the vehicle battery, the control device controls the cooling device and/or the heating device to adjust the temperature of the vehicle battery through heat conduction of the heat-conducting medium; wherein the vehicle status signal comprises: a charging mode and a travel mode.

In one embodiment, the control device comprises: a first controller and a second controller; the refrigerating apparatus includes: the system comprises a compressor, a condenser, a refrigeration expansion valve, an evaporator, a refrigeration exchanger and a battery expansion valve; the compressor, the condenser, the refrigeration expansion valve and the evaporator are sequentially connected to form a refrigeration loop; one end of the battery expansion valve is connected between the condenser and the refrigeration expansion valve, the other end of the battery expansion valve is connected with the refrigeration exchanger, and one end of the refrigeration exchanger, which is far away from the battery expansion valve, is connected between the evaporator and the compressor and is communicated with the automobile battery; the heat-conducting medium enters the cooling loop through the refrigeration exchanger so as to reduce the temperature of the heat-conducting medium; based on the automobile state signal, the temperature signal of the automobile battery and the feedback signal of the second controller, the first controller controls the opening degree of the refrigeration expansion valve and controls the rotating speeds of the compressor and the fan of the condenser, and outputs a first control signal; the second controller receives the state signal of the refrigerating device and the first control signal so as to control the rotating speed of a fan of the evaporator.

In one embodiment, the control device further comprises: a third controller; the heating device includes: a heating water pump, a heater and a heating exchanger; the heating water pump, the heater and the heating exchanger are sequentially communicated to form a heating loop, and the heating exchanger is communicated with the automobile battery; the heat-conducting medium enters the heating loop through the heating exchanger so as to increase the temperature of the heat-conducting medium; the first controller controls the start and stop of the heater and outputs a second control signal based on the received automobile state signal, the temperature signal of the automobile battery and the feedback signal of the third controller; and the third controller receives the state signal of the heating device and the second control signal so as to control the rotating speed of the heating water pump.

In one embodiment, the temperature control system further comprises: the cooling water pump is arranged between the cooling exchanger and the automobile battery; the third controller is electrically connected with the cooling water pump to control the rotating speed of the cooling water pump.

In one embodiment, when the vehicle is in a charging mode or a driving mode, the refrigeration device is turned off, and the temperature of the vehicle battery is greater than or equal to 40 ℃, the first controller controls the fan of the condenser to be started, the third controller controls the cooling water pump to be started, and then the first controller controls the battery expansion valve and the compressor to be started, so that the heat conducting medium takes away the heat of the vehicle battery.

In one embodiment, when the vehicle is in a charging mode or a driving mode, the refrigeration device is turned on, and the temperature of the vehicle battery is greater than or equal to 35 ℃, the first controller controls the fan of the condenser to be started, the third controller controls the cooling water pump to be started, and then the first controller controls the refrigeration expansion valve, the battery expansion valve and the compressor to be started, so that the heat of the vehicle battery is taken away by the heat-conducting medium.

In one embodiment, when the first controller determines that the temperature difference between different positions of the automobile battery is greater than or equal to 10 ℃, the third controller controls the cooling water pump to be repeatedly opened for 40-120 s and closed for 240-360 s; and the third controller controls the cooling water pump to be closed until the temperature difference of different positions of the automobile battery is less than or equal to 6 ℃.

In one embodiment, when the first controller determines that the vehicle is in a charging mode or charging is completed and the temperature of the vehicle battery is less than or equal to 5 ℃, the third controller controls the heating water pump to start, and then the first controller controls the heater to be turned on and the third controller controls the cooling water pump to start, so as to increase the temperature of the vehicle battery.

In one embodiment, the temperature control system further comprises: a battery temperature sensor and a water temperature sensor; the battery temperature sensor is used for acquiring the temperature of the automobile battery, and the water temperature sensor is used for acquiring the temperature of the heat-conducting medium and feeding back the temperature signals to the control device in the forms of the temperature signal of the automobile battery and the temperature signal of the heat-conducting medium respectively; the control device is used for controlling the heating device to start when the temperature of the automobile battery is less than or equal to 5 ℃ and the temperature difference between the automobile battery and the heat-conducting medium is less than or equal to 8-12 ℃; and controlling the heating device to be turned off when the temperature of the automobile battery is greater than or equal to 10 ℃.

In one embodiment, the control device controls the water temperature sensor to obtain the temperature of the heat-conducting medium every preset time interval; when the difference value between the maximum temperature and the minimum temperature acquired by the heat-conducting medium at adjacent time or the same time is greater than or equal to 15 ℃, the control device discards the maximum temperature and the minimum temperature and controls the water temperature sensor to acquire the temperature of the heat-conducting medium again after 4-10 s.

The temperature control system of this application can cool off or heat the car battery to adjust the temperature of car battery. The temperature of the automobile battery is controlled, and meanwhile, the overall energy consumption of the automobile is reduced. In addition, the temperature control system can also prevent the condition that the temperature is uneven for the car battery to make the car battery also can have relatively stable operating temperature under microthermal external environment, in order to reduce the potential safety hazard and improve the life of car battery.

Drawings

Fig. 1 is a block diagram of a temperature control system for a vehicle battery according to an embodiment of the present application.

Fig. 2 is a schematic diagram of a temperature control system for a vehicle battery according to an embodiment of the present application.

Fig. 3 is a schematic diagram of a refrigeration apparatus according to an embodiment of the present application.

Fig. 4 is a schematic diagram of a heating device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

Referring to fig. 1 to fig. 2, an embodiment of the present invention provides a temperature control system 100 for an automobile battery, where the temperature control system 100 can cool or heat an automobile battery 7 to adjust the temperature of the automobile battery 7, so as to reduce the overall energy consumption of an automobile while controlling the temperature of the automobile battery. Through this temperature control system 100, the uneven condition of temperature can also prevent to appear in car battery 7 to make car battery 7 also can have relatively stable operating temperature under microthermal external environment.

Referring to fig. 1, the temperature control system 100 includes: a cooling device 110, a heating device 120 and a control device 130. The control device 130 is electrically connected with the refrigeration device 110 and the heating device 120 respectively, the refrigeration device 110 and the heating device 120 are communicated with the automobile battery 7 through pipelines, and the heat-conducting medium can flow among the automobile battery 7, the refrigeration device 110 and the heating device 120. Thus, both the cooling device 110 and the heating device 120 can adjust the temperature of the vehicle battery 7 by adjusting the temperature of the heat transfer medium. It should be understood that the heat conducting medium may be water or other liquid with good heat conducting property, without limitation. After the heat-conducting medium flows through the refrigeration device 110, the refrigeration device 110 can reduce the temperature of the heat-conducting medium, and then the heat-conducting medium flows through the automobile battery 7 through a pipeline to take away the heat of the automobile battery 7, thereby reducing the temperature of the automobile battery 7. After the heat transfer medium flows through the heating device 120, the heating device 120 may increase the temperature of the heat transfer medium, and then the heat transfer medium flows through the vehicle battery 7 so that the vehicle battery 7 takes away the heat of the heat transfer medium, thereby increasing the temperature of the vehicle battery 7.

It should be understood that the temperature control system 100 may be provided with a cold plate (not shown) to space the vehicle battery 7 from the heat transfer medium. The vehicle battery 7 and the heat conducting medium are directly conducted through the cold plate, so that the temperature of the vehicle battery 7 can be increased or decreased, and the temperature control of the vehicle battery can be realized.

Based on the vehicle status signal 11 and the temperature signal of the vehicle battery 7, the control device 130 controls the cooling device 110 and/or the heating device 120 accordingly to adaptively adjust the temperature of the vehicle battery 7. In some embodiments, the vehicle status signal 11 includes: a charging mode and a travel mode. The charging mode is that the charging port of the automobile is electrically connected with the charging pile, so that the automobile battery 7 is charged. The driving mode is a state in which the vehicle is running.

Referring to fig. 2, in an embodiment, the control device 130 includes: a first controller 1, a second controller 2 and a third controller 3. The first controller 1 is electrically connected with the second controller 2 and the third controller 3, respectively, so that the first controller 1 can realize data exchange with the second controller 2 and the third controller 3, respectively.

The first controller 1 may receive the vehicle state signal 11, the external environment temperature signal, the temperature signal of the vehicle battery 7, the feedback signal 4 of the second controller 2, the feedback signal 5 of the third controller 3, and so on, and the first controller 1 may output the first control signal 6a or the second control signal 6 b. Accordingly, the second controller 2 may receive the status signal of the refrigeration device 110 and the first control signal 6 a; thus, the first controller 1 and the second controller 2 may control the cooling device 110 to be turned on or off. The third controller 3 may receive the status signal of the heating device 120 and the second control signal 6 b; the first controller 1 and the third controller 3 are used for controlling the heating device 120 to control the heating device 120 to be turned on or off.

Referring to fig. 2 and fig. 3, in an embodiment, the refrigeration device 110 includes: condenser 13, refrigeration expansion valve 15, compressor 16, evaporator 20, refrigeration exchanger 22, and battery expansion valve 14. It should be understood that the various components of the refrigeration unit 110 shown above may all be in communication via conduits. The condenser 13 and the evaporator 20 are respectively provided with a fan to improve the operation efficiency, as shown in fig. 2 and 3 as an example, the condenser 13 is provided with a fan 17, and the evaporator 20 is provided with a fan 18.

The compressor 16, the condenser 13, the refrigeration expansion valve 15, and the evaporator 20 are connected in series to form a refrigeration circuit through which a heat transfer medium can flow. The battery expansion valve 14 is connected at one end between the condenser 13 and the refrigeration expansion valve 15 and at the other end to the refrigeration exchanger 22, and the end of the refrigeration exchanger 22 remote from the battery expansion valve 14 is connected between the evaporator 20 and the compressor 16 and communicates with the vehicle battery 7. Thereby, the heat transfer medium may enter the cooling circuit through the refrigeration exchanger 22 to take away heat of the heat transfer medium through the cooling circuit, and the temperature of the heat transfer medium may be lowered.

In some embodiments, the first controller 1 may control the opening degree of the refrigeration expansion valve 15, the rotation speed of the compressor 16, and the rotation speed of the fan 17 of the condenser 13. The second controller 2 may then control the speed of the fan 18 of the evaporator 20.

Referring to fig. 2 and 4, in an embodiment, the heating device 120 includes: a heating exchanger 8, a heating water pump 9 and a heater 10. It should be understood that, by analogy, the various components of the heating device 120 shown above may all be in communication via conduits.

The heating water pump 9, the heater 10 and the heating exchanger 8 are communicated in sequence to form a heating loop, and the heating exchanger 8 is communicated with the automobile battery 7. The heat transfer medium enters the heating circuit through the heat exchanger 8 to provide energy to the heat transfer medium through the heating circuit, so that the temperature of the heat transfer medium can be increased.

In some embodiments, the first controller 1 may also control the start and stop of the heater 10, and the third controller 3 may control the rotation speed of the heating water pump 9.

Referring to fig. 2 again, in an embodiment, the temperature control system 100 further includes a cooling water pump 19, and the cooling water pump 19 is configured to transfer the heat transfer medium cooled by the cooling device 110 to the automobile battery 7, so as to reduce the temperature of the automobile battery 7. To control the cooling water pump 19, the third controller 3 is electrically connected to the cooling water pump 19, and thereby controls the rotational speed of the cooling water pump 19. It should be understood that the cooling water pump 19 may also be included as part of the refrigeration unit 110 in some embodiments.

In some embodiments, when the vehicle is in the charging mode or the driving mode, the refrigeration device 110 is turned off, and the temperature of the vehicle battery 7 is greater than or equal to 40 ℃, it may be determined that the temperature of the vehicle battery 7 of the vehicle is higher, and there is a greater potential safety hazard; in particular, there is a great risk for a running vehicle. Based on this, in order to prevent an accident from occurring during the charging or driving of the vehicle, the first controller 1 controls the fan 17 of the condenser 13 to be started, the third controller 3 controls the cooling water pump 19 to be started, and then the first controller 1 controls the battery expansion valve 14 and the compressor 16 to be started again, so that the heat transfer medium flows between the vehicle battery 7 and the cooling device 110, thereby taking away the heat of the vehicle battery 7 and thus reducing the temperature of the vehicle battery 7.

When the temperature of the vehicle battery 7 is lowered to 35 c, it may be determined that the temperature of the vehicle battery 7 has been lowered to a relatively suitable range, and the cooling device 110 may be turned off by the control device 130. Illustratively, the first controller 1 turns off the compressor 16, then the first controller 1 turns off the battery expansion valve 14 and the blower 17 of the condenser 13, and the third controller 3 turns off the cooling water pump 19.

In other embodiments, the temperature of the car battery 7 of the car is judged to be high when the car is in the charging mode or the driving mode, the cooling device 110 is turned on, and the temperature of the car battery 7 is greater than or equal to 35 ℃. In particular, there is a great risk for a running vehicle. In order to prevent accidents in the process of charging or driving of the automobile, the first controller 1 controls the fan 17 of the condenser 13 to be started, the third controller 3 controls the cooling water pump 19 to be started, and then the first controller 1 controls the refrigeration expansion valve 15, the battery expansion valve 14 and the compressor 16 to be started, so that the heat conducting medium takes away heat of the automobile battery 7.

Correspondingly, when the temperature of the vehicle battery 7 is reduced to 30 ℃, it may be determined that the temperature of the vehicle battery 7 has been reduced to a relatively suitable range, and the cooling device 110 may be turned off by the control device 130. Illustratively, the first controller 1 turns off the compressor 16, then the first controller 1 turns off the battery expansion valve 14 and the blower 17 of the condenser 13, and the third controller 3 turns off the cooling water pump 19.

In one embodiment, in order to prevent temperature unevenness of the automobile battery 7 (the temperature unevenness may be a situation where the local temperature of the automobile battery 7 is too high or too low), the service life of the automobile battery 7 is shortened or a safety accident is easily caused. In the embodiment, the temperatures of different positions of the automobile battery 7 are obtained through the first controller 1, and when the temperature difference of different positions of the automobile battery 7 is greater than or equal to 10 ℃, the third controller 3 is utilized to control the cooling water pump 19 to repeat the following processes of turning on 40 s-120 s (such as 50s, 60s, 70s, 80s, 90s, 100s or 110s) and turning off 240 s-360 s (such as 250s, 260s, 270s, 280s, 290s, 300s, 310s, 320s, 330s, 340s or 350 s); the supercooling water pump 19 and the cooling device 110 are used to adjust the temperatures of the different positions of the vehicle battery 7, thereby controlling the difference between the temperatures of the different positions of the vehicle battery 7 within a certain range.

And when the cooling water pump 19 is repeatedly turned on and off a plurality of times until the difference in temperature at different positions of the automobile battery 7 is less than or equal to 6 deg.c, it is determined that the difference in temperature at different positions of the automobile battery 7 is small, whereby the third controller 3 controls the cooling water pump 19 to be turned off.

In some embodiments, the vehicle battery 7 has a suitable temperature for the vehicle to operate well to provide power after the user starts the vehicle during or after the vehicle is charged. In the embodiment, the temperature of the automobile battery 7 in the charging process or after the charging is completed is obtained through the first controller 1, when the temperature of the automobile battery 7 is less than or equal to 5 ℃, the third controller 3 controls the heating water pump 9 to start, then the first controller 1 controls the heater 10 to start, and the third controller 3 controls the cooling water pump 19 to start, so that a circulating water path is formed among the automobile battery 7, the cooling water pump 19, the cooling exchanger 22 and the heating exchanger 8, and the temperature of the heat-conducting medium is increased through the heating device 120. Furthermore, the temperature of the automobile battery 7 is increased through the flow of the heat-conducting medium between the circulating water channels, so that the service life of the automobile battery 7 is prolonged, and potential safety hazards are reduced.

In some embodiments, the temperature control system 100 of the vehicle battery 7 may further include: a battery temperature sensor 23 and a water temperature sensor 24. The battery temperature sensor 23 is used to acquire the temperature of the vehicle battery 7 and feed back the temperature signal of the vehicle battery 7 to the third controller 3. The water temperature sensor 24 is used for acquiring the temperature of the heat-conducting medium and feeding back the temperature signal of the heat-conducting medium to the third controller 3. The third controller 3 feeds back the data of the temperature of the battery of the vehicle and the data of the temperature of the heat transfer medium to the first controller 1. Thus, the first controller 1 can send the second control signal 6b to the third controller 3 through the feedback signal 5 given by the third controller 3, and the third controller 3 adjusts the rotation speed of the heating water pump 9 accordingly based on the second control signal 6b sent by the first controller 1.

When the first controller 1 determines that the temperature of the vehicle battery 7 is less than or equal to 5 ℃, and the temperature difference between the vehicle battery 7 and the heat transfer medium is less than or equal to 8 ℃ to 12 ℃ (for example, 9 ℃, 10 ℃ or 11 ℃), it can be determined that the temperatures of the vehicle battery 7 and the heat transfer medium are both low. Based on this, the third controller 3 controls the heating water pump 9 to be turned on, and then the first controller 1 controls the heater 10 and the battery expansion valve 14 to be turned on, so as to raise the temperature of the heat transfer medium by the heating device 120, and thus, the temperature of the vehicle battery 7 by the heat transfer medium. When the temperature of the automobile battery 7 is heated to be greater than or equal to 10 ℃, it can be determined that the temperature of the automobile battery 7 is relatively high, and in this case, the automobile does not have a great risk in charging or driving. Thus, the first controller 1 turns off the heater 10, and then the third controller 3 turns off the heating water pump 9 again to end the heating process of the vehicle battery 7.

In some embodiments, during the heating process of the automobile battery 7, when the temperature of the heat transfer medium is greater than or equal to 40 ℃, the first controller 1 controls to turn off the heater 10; when the temperature of the heat-conducting medium is less than or equal to 35 ℃, the first controller 1 controls the heater 10 to be turned on. Therefore, in the heating process, the heat-conducting medium can have a relatively stable temperature, so that the temperature of the automobile battery 7 can be relatively stably increased, the temperature control system 100 can conveniently control the temperature of the automobile battery 7, and potential safety hazards caused by the fact that the automobile battery 7 is heated too fast or too slow can be prevented.

It should be understood that when the temperature of the car battery 7 is reduced to 5 ℃ or below and the temperature difference between the car battery 7 and the heat-conducting medium is less than or equal to 8 ℃ to 12 ℃, the control device 130 performs the above heating process again to increase the temperature of the car battery 7.

In order to prevent the water temperature sensor 24 from acquiring some invalid temperature data due to a drastic change of the external environment, the temperature control system 100 according to the embodiment of the present application may further screen the temperature data of the heat-conducting medium through cooperation of the third controller 3 and the water temperature sensor 24. The third controller 3 obtains the temperature of the heat-conducting medium once every preset time, which may be several seconds, ten seconds, or several tens of seconds, without limitation. When the difference between the maximum temperature and the minimum temperature acquired by the heat-conducting medium at adjacent time or the same time is greater than or equal to 15 ℃, the third controller 3 discards the maximum temperature and the minimum temperature (or does not feed the maximum temperature and the minimum temperature back to the first controller 1), and then the third controller 3 controls the water temperature sensor 24 to acquire the temperature of the heat-conducting medium again after 4 s-10 s (for example, 5s, 6s, 7s, 8s, or 9s), so as to eliminate the influence on the water temperature sensor 24 caused by the change of the external environment and maintain the normal working state of the temperature control system 100.

It should be understood that the time between adjacent time instants is the preset time. When the third controller 3 discards the maximum temperature and the minimum temperature, the maximum temperature and the minimum temperature acquired at the previous time may be maintained, and the temperature of the heat transfer medium may be acquired again after 4s to 10 s. Furthermore, the maximum temperature and the minimum temperature may also be derived from the temperature of the vehicle battery 7 at different locations at the same time.

In some embodiments, the temperature control system 100 in the above embodiments may further include a pressure sensor 25, and the pressure sensor 25 may acquire pressure data inside the refrigeration device 110 and transmit the pressure data to the first controller 1 in the form of a pressure signal, so that the first controller 1 may adjust the pressure inside the refrigeration device 110 according to the requirement.

While the foregoing is directed to embodiments of the present application, it will be appreciated by those skilled in the art that various changes and modifications may be made without departing from the principles of the application, and it is intended that such changes and modifications be covered by the scope of the application.