Power battery temperature control system

Abstract

A power battery temperature control system, comprising: a first temperature sensor, a second temperature sensor, a thermal management mechanism, and a controller. The first temperature sensor is disposed on a power battery; the second temperature sensor is disposed on a first water inlet passage; the thermal management mechanism is connected to an engine cooling circuit by means of a second water inlet passage and the first water inlet passage; and the controller is used for controlling, on the basis of temperatures fed back by the first temperature sensor and the second temperature sensor, the thermal management mechanism to connect or disconnect from the engine cooling circuit, or controlling a cooling module to start or stop. When the temperature of the power battery is lower than a threshold, cooling water of an engine is used to heat the power battery. However, the temperature of the cooling water is too high during the operation of the engine, such that the temperature of the cooling water of the engine needs to be lowered by means of the cooling module, and then the cooling water is supplied to the first water inlet passage to heat the power battery to a normal working temperature.

Description

A power battery temperature control system

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411235161.9, filed on September 04, 2024, the entire contents of which are incorporated by reference herein for all purposes. TECHNICAL FIELD

[0003] The present application relates to the technical field of battery temperature control, and particularly relates to a power battery temperature control system. BACKGROUND

[0004] With the rapid development of power batteries, more and more power batteries are applied to mining vehicles. At present, due to the limitation of power battery materials, the performance of power batteries cannot meet the use requirements in low-temperature and high-temperature environments.

[0005] The inventor realizes that in order to solve the problem that the power battery cannot work normally in a low-temperature environment, a measure of adding thermal insulation cotton outside the power battery is generally adopted. However, the thermal insulation effect of the thermal insulation cotton is not ideal, and the thermal insulation cotton will affect the heat dissipation of the power battery in a high-temperature environment, and the power battery still cannot work normally in extremely cold weather. SUMMARY

[0006] The present application aims to at least solve one of the technical problems in the prior art or related art that the thermal insulation effect of the thermal insulation cotton is not ideal, and the thermal insulation cotton will affect the heat dissipation of the power battery in a high-temperature environment, and the power battery still cannot work normally in extremely cold weather.

[0007] To this end, the present application provides a power battery temperature control system. When the temperature of the power battery is lower than a threshold value, the engine cooling water is used to heat the power battery. However, the temperature of the engine cooling water is too high during the operation of the engine, and the engine cooling water temperature needs to be reduced by a cooling module, and then supplied to a first water inlet channel to heat the power battery to a normal working temperature.

[0008] According to an embodiment of the present application, a power battery temperature control system comprises a first temperature sensor, a second temperature sensor, a thermal management mechanism and a controller. The first temperature sensor is arranged on the power battery and is configured to detect the temperature of the power battery. The second temperature sensor is arranged on a first water inlet channel, which is a water inlet channel from the thermal management mechanism to the power battery. The second temperature sensor is configured to detect the temperature of the liquid in the first water inlet channel. The thermal management mechanism is connected to the first water inlet channel through a second water inlet channel and an engine cooling pipeline. The engine cooling pipeline is used to heat the power battery through the liquid in the first water inlet channel. The thermal management mechanism is used to cool the power battery through the cooling module arranged inside and using the liquid in the first water inlet channel. The controller is used to control the thermal management mechanism to turn on or off the engine cooling pipeline, or to control the cooling module to start or stop, based on the temperatures fed back by the first temperature sensor and the second temperature sensor.

[0009] Optionally, the controller is configured to send a first control instruction when it is detected that the temperature fed back by the first temperature sensor is lower than a first battery lower threshold value. The first control instruction is used to control the thermal management mechanism to turn on the second water inlet channel. The controller is configured to send a second control instruction when it is detected that the temperature fed back by the second temperature sensor is higher than a water channel upper threshold value and it is detected that the thermal management mechanism turns on the second water inlet channel. The second control instruction is used to start the cooling module.

[0010] Optionally, the cooling module comprises an exhaust fan. The cooling module is configured to start the exhaust fan to work when it receives the second control instruction.

[0011] Optionally, the power battery temperature control system further comprises a fuel heater. The fuel heater is connected to the first water inlet channel through a third water inlet channel and the thermal management mechanism. The fuel heater is used to heat the liquid in the first water inlet channel. The controller is configured to send a third control instruction when it is detected that the temperature fed back by the first temperature sensor is lower than the first battery lower threshold value, it is detected that the temperature fed back by the second temperature sensor is lower than a water channel lower threshold value, and it is detected that the thermal management mechanism turns on the second water inlet channel. The third control instruction is used to control the thermal management mechanism to switch to turn on the third water inlet channel and start the fuel heater.

[0012] Optionally, the controller is configured to send a fourth control instruction when it is detected that the temperature fed back by the second temperature sensor is higher than the water channel upper threshold value and it is detected that the thermal management mechanism turns on the third water inlet channel. The fourth control instruction is used to control the fuel heater to reduce the heating power.

[0013] Optionally, the fuel heater comprises a heat exchange cavity, an ignition electrode, a solenoid valve and a fuel pump, the heat exchange cavity is connected with the third water inlet channel; an input end of the fuel pump is connected with the fuel tank through a pipeline, an output end of the fuel pump is connected with the ignition electrode through a pipeline, the solenoid valve is arranged on the pipeline between the output end of the fuel pump and the ignition electrode; the ignition electrode is arranged in the heat exchange cavity, and the ignition electrode is used for igniting a flame to heat the heat exchange cavity.

[0014] Optionally, the heat management mechanism further comprises a power module, a water pump and a reversing valve group, the water pump is arranged on the first water inlet channel; the first water inlet channel is connected with the second water inlet channel and the third water inlet channel through the reversing valve group; the reversing valve group is used for switching the second water inlet channel and the third water inlet channel; the power module is used for supplying power to the water pump and the reversing valve group.

[0015] Optionally, the controller is configured to send a fifth control instruction when it is detected that the temperature fed back by the first temperature sensor is higher than the upper limit threshold of the battery, and the fifth control instruction is used to start the cooling module; the cooling module comprises a compressor, and the cooling module is configured to start the compressor to work when the fifth control instruction is received.

[0016] Optionally, the controller is configured to send a sixth control instruction when it is detected that the temperature fed back by the first temperature sensor is lower than the second lower limit threshold of the battery, and the sixth control instruction is used to switch the power supply of the heat management mechanism to the generator; the second lower limit threshold of the battery is lower than the first lower limit threshold of the battery.

[0017] Optionally, the controller is configured to send a sixth control instruction when it is detected that the temperature fed back by the first temperature sensor is lower than the third lower limit threshold of the battery, and the seventh control instruction is used to switch the power supply of the heat management mechanism to the storage battery; the third lower limit threshold of the battery is lower than the second lower limit threshold of the battery.

[0018] One of the above technical solutions has at least the following advantages or beneficial effects:

[0019] For the power battery temperature control system of the embodiment of the application, comprising: a first temperature sensor, a second temperature sensor, a thermal management mechanism and a controller, the first temperature sensor is arranged on the power battery and is configured to detect the temperature of the power battery; the second temperature sensor is arranged on the first water inlet channel, the first water inlet channel is a water inlet channel from the thermal management mechanism to the power battery; the second temperature sensor is configured to detect the temperature of the liquid in the first water inlet channel; the thermal management mechanism is connected with the engine cooling pipeline through the second water inlet channel and the first water inlet channel, the engine cooling pipeline is used for heating the power battery through the liquid in the first water inlet channel; the thermal management mechanism is used for cooling the power battery through the cooling module arranged inside and using the liquid in the first water inlet channel; the controller is used for controlling the thermal management mechanism to turn on or turn off the engine cooling pipeline, or controlling the cooling module to start or turn off, based on the temperature feedback by the first temperature sensor and the second temperature sensor. When the temperature of the power battery is lower than a threshold value, the engine cooling water is used to heat the power battery, but the temperature of the cooling water is too high during the operation of the engine, and the cooling module is needed to reduce the temperature of the engine cooling water, and then supply the first water inlet channel to heat the power battery to the normal working temperature. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0021] Fig. 1 shows the structure block diagram of the power battery temperature control system provided by the embodiment of the present application;

[0022] Fig. 2 shows the structure block diagram of the thermal management mechanism provided by the embodiment of the present application;

[0023] Fig. 3 shows the structure block diagram of the cooling module provided by the embodiment of the present application;

[0024] Fig. 4 shows the structure block diagram of the fuel heater provided by the embodiment of the present application;

[0025] Fig. 5 shows the structure block diagram of the power supply of the thermal management mechanism provided by the embodiment of the present application. DETAILED DESCRIPTION

[0026] The technical solutions of the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0027] As described above, the power battery is a core component for providing power for the whole vehicle, and has an output voltage as high as 600V, but needs to work in an ambient temperature of-25℃ to 40℃. When the temperature is lower than-25℃, the output current of the power battery will be sharply reduced due to the low-temperature characteristics of the power battery, and the power battery cannot work normally in a low-temperature environment.

[0028] At present, to solve the problem that the power battery cannot work normally in a low-temperature environment, a measure of adding thermal insulation cotton outside the power battery is generally adopted. However, the thermal insulation effect of the thermal insulation cotton is not ideal, and the thermal insulation cotton will affect the heat dissipation of the power battery in a high-temperature environment, and the power battery still cannot work normally in extremely cold weather.

[0029] In order to at least solve one of the technical problems existing in the prior art or related art, the present application provides a power battery temperature control system, comprising: a first temperature sensor, a second temperature sensor, a thermal management mechanism and a controller, the first temperature sensor is arranged on the power battery, and the first temperature sensor is configured to detect the temperature of the power battery; the second temperature sensor is arranged on a first water inlet channel, and the first water inlet channel is a water inlet channel from the thermal management mechanism to the power battery; the second temperature sensor is configured to detect the temperature of the liquid in the first water inlet channel; the thermal management mechanism is connected with an engine cooling pipeline through a second water inlet channel and the first water inlet channel, and the engine cooling pipeline is used for heating the power battery through the liquid in the first water inlet channel; the thermal management mechanism is used for cooling the power battery by using the liquid in the first water inlet channel through an internally arranged cooling module; and the controller is used for controlling the thermal management mechanism to turn on or turn off the engine cooling pipeline, or controlling the cooling module to start or turn off, based on the temperatures fed back by the first temperature sensor and the second temperature sensor. When the temperature of the power battery is lower than a threshold value, the engine cooling water is used to heat the power battery, but the temperature of the cooling water is too high during the operation of the engine, and the cooling module is needed to reduce the temperature of the engine cooling water, and then supply the first water inlet channel to heat the power battery to a normal working temperature.

[0030] The power battery temperature control system according to some embodiments provided by the present application is described below with reference to the accompanying drawings.

[0031] Referring to FIGS. 1 to 5, the power battery temperature control system provided by the embodiments of the present application comprises: a first temperature sensor, a second temperature sensor, a thermal management mechanism and a controller, the first temperature sensor is arranged on the power battery, and the first temperature sensor is configured to detect the temperature of the power battery; the second temperature sensor is arranged on a first water inlet channel, and the first water inlet channel is a water inlet channel from the thermal management mechanism to the power battery; and the second temperature sensor is configured to detect the temperature of the liquid in the first water inlet channel.

[0032] The power battery is wrapped by a power battery water jacket, the power battery water jacket is provided with a first water inlet channel and a first water outlet channel, the first water inlet channel is used for introducing liquid into the power battery water jacket, and the first water outlet channel is used for discharging liquid from the power battery water jacket, so that the first water inlet channel and the first water outlet channel form a circulation loop, and the liquid can be water, antifreeze, coolant or the like. Through liquid circulation, the power battery can be heated or cooled.

[0033] The thermal management mechanism is connected with the engine cooling pipeline through the second water inlet channel and the first water inlet channel, the engine cooling pipeline is used for heating the power battery through the liquid in the first water inlet channel, and the thermal management mechanism is used for cooling the power battery through the cooling module arranged inside and using the liquid in the first water inlet channel.

[0034] The engine cooling pipeline is connected with the engine cooling system, the engine cooling system can provide engine cooling water, the temperature of the cooling water can reach 100℃ during engine operation, and the waste heat of the engine cooling water can be used to heat the power battery. The thermal management mechanism is internally provided with a cooling module, as shown in FIG. 2, the cooling module is used for cooling the liquid in the first water inlet channel.

[0035] The controller is used for controlling the thermal management mechanism to turn on or turn off the engine cooling pipeline based on the temperature feedback by the first temperature sensor and the second temperature sensor, or controlling the cooling module to start or turn off.

[0036] In an illustrative embodiment, the controller is configured to send a first control instruction when it is detected that the temperature feedback by the first temperature sensor is lower than a first battery lower threshold, the first control instruction being used for controlling the thermal management mechanism to turn on the second water inlet channel; and send a second control instruction when it is detected that the temperature feedback by the second temperature sensor is higher than a water channel upper threshold and it is detected that the thermal management mechanism turns on the second water inlet channel, the second control instruction being used for starting the cooling module.

[0037] The controller is connected with each mechanism through a cable or wireless mode, is used for receiving the signal feedback by each sensor, and controls the motor, brake, valve and other devices of each mechanism to work. The controller can be an industrial computer, a single-chip microcomputer, a programmable logic controller (PLC), a digital signal processor (DSP), a field programmable gate array (FPGA), an application-specific integrated circuit (ASIC) and other devices with storage and operation functions, and the embodiments of the present application do not limit this.

[0038] When the power battery is in a low-temperature environment, the power battery needs to be heated, the first battery lower threshold is the lower limit of the normal working temperature of the power battery, and the range can be set to-25℃ to-15℃. For example, the first battery lower threshold is-25℃, when the temperature fed back by the first temperature sensor is lower than-25℃, the controller sends the first control instruction; or the first battery lower threshold is-20℃, when the temperature fed back by the first temperature sensor is lower than-20℃, the controller sends the first control instruction; or the first battery lower threshold is-15℃, when the temperature fed back by the first temperature sensor is lower than-15℃, the controller sends the first control instruction.

[0039] When the thermal management mechanism receives the first control instruction, the second water inlet channel is connected, so that the engine cooling water can flow from the second water inlet channel into the first water inlet channel to heat the power battery; at the same time, the second water outlet channel is connected, so that the cooling water can flow from the first water outlet channel to the second water outlet channel to form a circulation in the engine cooling pipeline. However, if the temperature of the engine cooling water is too high and exceeds the upper limit of the temperature that the power battery can withstand, direct heating of the power battery can easily cause damage. The water channel upper threshold is the upper limit of the temperature that the power battery can withstand, and the range can be set to 40℃ to 50℃. For example, the water channel upper threshold is 40℃, when the temperature fed back by the second temperature sensor is higher than 40℃ and the thermal management mechanism connects the second water inlet channel, the controller sends the second control instruction; or the water channel upper threshold is 45℃, when the temperature fed back by the second temperature sensor is higher than 45℃ and the thermal management mechanism connects the second water inlet channel, the controller sends the second control instruction; or the water channel upper threshold is 50℃, when the temperature fed back by the second temperature sensor is higher than 50℃ and the thermal management mechanism connects the second water inlet channel, the controller sends the second control instruction.

[0040] In an illustrative embodiment, as shown in FIG. 3, the cooling module includes an exhaust fan, and the cooling module is configured to start the exhaust fan to work when the second control instruction is received.

[0041] Generally, when the second water inlet channel is connected to heat the power battery, the outdoor temperature is also lower than-25℃ to-15℃, at this time, the first water inlet channel can be cooled by starting the exhaust fan to use the outdoor cold air, which can not only achieve good cooling effect, but also effectively save energy. The engine cooling water temperature is reduced to below the water channel upper threshold by the cooling module, and then the first water inlet channel is supplied to heat the power battery to the normal working temperature. In this process, the temperature of the first water outlet channel is reduced, and the engine cooling can also be circulated through the second water outlet channel, effectively utilizing the engine waste heat and saving energy consumption.

[0042] In an illustrative embodiment, when it is detected that the temperature fed back by the first temperature sensor reaches the battery intermediate threshold value, a stop instruction is sent, the stop instruction being used to control the thermal management mechanism to close the second water inlet channel, or to close the fuel heater, or to close the cooling module. The battery intermediate threshold value is a suitable temperature value for the normal operation of the power battery, and can be set to a range of 10-20°C. When the temperature fed back by the first temperature sensor reaches the battery intermediate threshold value, it indicates that the temperature of the power battery has been suitable, and heating or cooling is not needed.

[0043] In an illustrative embodiment, the controller is configured to send a fifth control instruction when it is detected that the temperature fed back by the first temperature sensor is higher than the battery upper threshold value, the fifth control instruction being used to start the cooling module.

[0044] When the power battery is in a high-temperature environment, the power battery needs to be cooled, and the battery upper threshold value is an upper temperature limit value for the normal operation of the power battery, and can be set to a range of 30-40°C. For example, the battery upper threshold value is 30°C, and when the temperature fed back by the first temperature sensor is higher than 30°C, the controller sends the fifth control instruction. Or, the battery upper threshold value is 35°C, and when the temperature fed back by the first temperature sensor is higher than 35°C, the controller sends the fifth control instruction. Or, the battery upper threshold value is 40°C, and when the temperature fed back by the first temperature sensor is higher than 40°C, the controller sends the fifth control instruction.

[0045] In an illustrative embodiment, the cooling module comprises a compressor, and the cooling module is configured to start the compressor to work when the fifth control instruction is received. The compressor can be shared with an air conditioning system in the vehicle, so that the air conditioning system can also be provided with cold air when the first water inlet channel is cooled, thereby saving energy consumption.

[0046] In an illustrative embodiment, the power battery temperature control system further comprises a fuel heater, the fuel heater being connected to the first water inlet channel through a third water inlet channel and the thermal management mechanism, and the fuel heater being used to heat the liquid in the first water inlet channel.

[0047] As shown in FIG. 4, the fuel heater comprises a heat exchange cavity, an ignition electrode, an electromagnetic valve, and a fuel pump. The heat exchange cavity is connected to the third water inlet channel. The input end of the fuel pump is connected to the fuel tank through a pipeline, the output end of the fuel pump is connected to the ignition electrode through a pipeline, and the electromagnetic valve is arranged on the pipeline between the output end of the fuel pump and the ignition electrode. The ignition electrode is arranged in the heat exchange cavity, and the ignition electrode is used to ignite a flame to heat the heat exchange cavity.

[0048] The heat exchange cavity is connected with the third water inlet channel and the third water outlet channel. The cooling water enters the heat exchange cavity from the first water outlet channel to the third water outlet channel, and flows out from the third water inlet channel to the first water inlet channel to form a circulation. The fuel pump draws fuel from the fuel tank to supply the ignition electrode, and the ignition electrode ignites the flame to heat the heat exchange cavity. The electromagnetic valve is used to control the opening or closing of the ignition electrode oil supply pipeline.

[0049] The controller is configured to send a third control instruction when it is detected that the temperature feedback by the first temperature sensor is lower than the first battery lower threshold, that the temperature feedback by the second temperature sensor is lower than the water channel lower threshold, and that the thermal management mechanism is connected to the second water inlet channel. The third control instruction is used to control the thermal management mechanism to switch to connecting to the third water inlet channel and start the fuel heater.

[0050] The water channel lower threshold is a lower temperature limit value of the power battery heating, which can be set in the range of -10℃ to -20℃. It is detected that the temperature feedback by the first temperature sensor is lower than the first battery lower threshold, indicating that the power battery needs to be heated. It is detected that the thermal management mechanism is connected to the second water inlet channel, indicating that the engine cooling pipeline has been used for heating. It is detected that the temperature feedback by the second temperature sensor is lower than the water channel lower threshold, indicating that the engine cooling pipeline cannot provide sufficient heating temperature, and the fuel heater needs to be switched to heating at this time.

[0051] In an illustrative embodiment, the controller is configured to send a fourth control instruction when it is detected that the temperature feedback by the second temperature sensor is higher than the water channel upper threshold, and that the thermal management mechanism is connected to the third water inlet channel. The fourth control instruction is used to control the fuel heater to reduce the heating power.

[0052] It is detected that the temperature feedback by the second temperature sensor is higher than the water channel upper threshold, and that the thermal management mechanism is connected to the third water inlet channel, indicating that the heating power of the fuel heater is too high. In order to make the first water inlet channel not exceed the upper temperature limit value that the power battery can withstand, the output power of the fuel pump can be controlled to be reduced, so that the ignition electrode ignites the flame to be smaller, and the heating power is reduced.

[0053] In an illustrative embodiment, the thermal management mechanism further includes a power module, a water pump and a reversing valve group. The water pump is arranged on the first water inlet channel. The first water inlet channel is connected with the second water inlet channel and the third water inlet channel through the reversing valve group. The reversing valve group is used to switch the second water inlet channel and the third water inlet channel. The power module is used to supply power to the water pump and the reversing valve group.

[0054] The water pump can provide sufficient power for the circulation loop formed by the first water inlet channel and the first water outlet channel. The reversing valve group includes a first reversing valve and a second reversing valve, the first reversing valve is used for switching the second water inlet channel and the third water inlet channel, and the second reversing valve is used for switching the second water outlet channel and the third water outlet channel. The power module adopts a bidirectional DC / DC converter, also known as a bidirectional DC / DC converter or a bidirectional direct current converter, which is an important power supply equipment and can efficiently and stably convert between different direct current voltages.

[0055] When the power supply is normal, as shown in FIG. 5, the power battery serves as a power supply, and the battery relay, the main positive relay and the main negative relay are closed to provide power for the whole vehicle. When the thermal management mechanism needs to work, the water cooling relay is closed, and the output voltage of the power battery can reach 600V, while the power supply voltage requirement of the water pump and the reversing valve group in the thermal management mechanism is 24V; the power supply voltage requirement of the exhaust fan is 24V, and the power supply voltage requirement of the compressor is 600V. Therefore, the power module can convert the input voltage of 600V into the output voltage of 600V and 24V.

[0056] In an illustrative embodiment, the controller is configured to send a sixth control instruction when it is detected that the temperature fed back by the first temperature sensor is lower than a second battery lower limit threshold, the sixth control instruction being used to switch the power supply of the thermal management mechanism to the generator; the second battery lower limit threshold is lower than the first battery lower limit threshold.

[0057] The second battery lower limit threshold is the lower limit value of the temperature at which the power battery cannot work normally, and the range can be set to-45℃ to-35℃. When it is detected that the temperature fed back by the first temperature sensor is lower than the second battery lower limit threshold, the output current of the power battery will decrease sharply, causing the battery relay and the water cooling relay to be automatically disconnected. At this time, the power supply needs to be switched to the generator in the vehicle, and the output voltage of the generator is 24V. The power module can convert the input voltage of 24V into the output voltage of 600V and 24V.

[0058] In an illustrative embodiment, the controller is configured to send a seventh control instruction when it is detected that the temperature fed back by the first temperature sensor is lower than a third battery lower limit threshold, the seventh control instruction being used to switch the power supply of the thermal management mechanism to the storage battery; the third battery lower limit threshold is lower than the second battery lower limit threshold.

[0059] The third battery lower threshold is a lower temperature threshold at which the generator cannot work normally, and the range can be set to-55℃ to-45℃. When the temperature feedback by the first temperature sensor is detected to be lower than the third battery lower threshold, the generator also cannot work normally, at which time the power supply needs to be switched to the battery in the vehicle. The output voltage of the battery is 24V, and the power supply module can convert the input voltage of 24V into the output voltage of 600V and 24V. Such a setting can enable the thermal management mechanism to work at very low temperatures, for example, when the temperature is lower than-55℃, the thermal management mechanism is switched to the fuel heater for heating, so that the temperature of the power battery reaches a working temperature, and the battery relay, the main positive relay and the main negative relay are closed, so that the power battery participates in the work of the vehicle.

[0060] It should be noted that the terms "first", "second", "third", "fourth", and the like (if any) in the description and claims of the present application and in the above description of the drawings (if any) are used only to distinguish similar objects, and do not necessarily have to be used to describe a particular order or sequence of steps. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0061] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "embodiment", "exemplary embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present application and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0062] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can modify, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A power cell temperature control system, wherein, Comprise: a first temperature sensor, a second temperature sensor, a thermal management mechanism and a controller, the first temperature sensor is arranged on a power battery, the first temperature sensor is configured to detect the temperature of the power battery; the second temperature sensor is arranged on a first water inlet channel, the first water inlet channel is a water inlet channel from the thermal management mechanism to the power battery; the second temperature sensor is configured to detect the temperature of the liquid in the first water inlet channel; the thermal management mechanism is connected with an engine cooling pipeline through a second water inlet channel and the first water inlet channel, the engine cooling pipeline is used to heat the power battery through the liquid in the first water inlet channel; the thermal management mechanism is used to cool the power battery through the cooling module arranged inside and using the liquid in the first water inlet channel; the controller is used to control the thermal management mechanism to turn on or off the engine cooling pipeline based on the temperature feedback of the first temperature sensor and the second temperature sensor, or control the cooling module to start or shut down.

2. The power battery temperature control system of claim 1, wherein the controller is configured to send a first control instruction when it is detected that the temperature feedback of the first temperature sensor is lower than a first battery lower threshold, the first control instruction is used to control the thermal management mechanism to turn on the second water inlet channel; when it is detected that the temperature feedback of the second temperature sensor is higher than a water channel upper threshold, and it is detected that the thermal management mechanism is turned on the second water inlet channel, a second control instruction is sent, the second control instruction is used to start the cooling module.

3. A power cell temperature control system as claimed in claim 2, wherein, The cooling module comprises an exhaust fan, and the cooling module is configured to start the exhaust fan to work when receiving the second control instruction.

4. The power cell temperature control system of claim 1, wherein, Further comprising a fuel heater, the fuel heater is connected with the thermal management mechanism through a third water inlet channel and the first water inlet channel, the fuel heater is used to heat the liquid in the first water inlet channel; the controller is configured to send a third control instruction when it is detected that the temperature feedback of the first temperature sensor is lower than a first battery lower threshold, it is detected that the temperature feedback of the second temperature sensor is lower than a water channel lower threshold, and it is detected that the thermal management mechanism is turned on the second water inlet channel, the third control instruction is used to control the thermal management mechanism to switch to turn on the third water inlet channel and start the fuel heater.

5. A power cell temperature control system as claimed in claim 4, wherein, the controller is configured to send a fourth control instruction when it is detected that the temperature feedback of the second temperature sensor is higher than a water channel upper threshold, and it is detected that the thermal management mechanism is turned on the third water inlet channel, the fourth control instruction is used to control the fuel heater to reduce the heating power.

6. A power cell temperature control system as claimed in claim 4, wherein, The fuel heater comprises a heat exchange cavity, an ignition electrode, a solenoid valve and a fuel pump, the heat exchange cavity is connected with the third water inlet channel; the input end of the fuel pump is connected with a fuel tank through a pipeline, the output end of the fuel pump is connected with the ignition electrode through a pipeline, the solenoid valve is arranged on the pipeline between the output end of the fuel pump and the ignition electrode; the ignition electrode is arranged in the heat exchange cavity, and the ignition electrode is used for igniting a flame to heat the heat exchange cavity.

7. A power cell temperature control system as claimed in claim 4, wherein, The heat management mechanism further comprises a power supply module, a water pump and a reversing valve group, the water pump is arranged on the first water inlet channel; the first water inlet channel is connected with the second water inlet channel and the third water inlet channel through the reversing valve group; the reversing valve group is used for switching the second water inlet channel and the third water inlet channel; the power supply module is used for supplying power to the water pump and the reversing valve group.

8. A power cell temperature control system as claimed in claim 1, wherein, The controller is configured to send a fifth control instruction when it is detected that the temperature fed back by the first temperature sensor is higher than a battery upper limit threshold, and the fifth control instruction is used to start the cooling module; The cooling module comprises a compressor, and the cooling module is configured to start the compressor to work when receiving the fifth control instruction.

9. A power cell temperature control system as claimed in claim 1, wherein, The controller is configured to send a sixth control instruction when it is detected that the temperature fed back by the first temperature sensor is lower than a second battery lower limit threshold, and the sixth control instruction is used to switch the power supply of the heat management mechanism to a generator; the second battery lower limit threshold is lower than the first battery lower limit threshold.

10. A power cell temperature control system as claimed in claim 9, wherein, The controller is configured to send a seventh control instruction when it is detected that the temperature fed back by the first temperature sensor is lower than a third battery lower limit threshold, and the seventh control instruction is used to switch the power supply of the heat management mechanism to a storage battery; the third battery lower limit threshold is lower than the second battery lower limit threshold.

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