TWI618643B - Electric vehicle battery temperature management system - Google Patents

Abstract

An electric vehicle battery temperature management system includes a temperature management module, a heating module, a cooling module, and a control module. The temperature management module includes a heat and heat medium pipeline corresponding to a battery module and circulating a temperature regulating liquid, and a heat exchanger disposed in the heat and heat medium pipeline. The control module controls the heating module and the cooling module to provide and remove the temperature regulating liquid heat energy through the heat exchanger. By setting the temperature management module, the heating module, the cooling module, and using the control module for control, the temperature of the battery module can be maintained in the working temperature range without The battery module is charged or discharged or the temperature is cold, causing the battery module to be too high/low temperature to operate properly.

Description

Electric vehicle battery temperature management system

The invention relates to a temperature management system, in particular to an electric vehicle battery temperature management system.

At present, the operating temperature range of a general electric vehicle battery is about 10 to 40 ° C, and the limit interval is about 0 to 50 ° C. If this limit interval is exceeded, the charging and discharging of the electric vehicle battery may be abnormal, however, since the electric vehicle battery is In the process of charging and discharging, heat energy is generated, which easily causes the temperature to rise and exceeds the limit interval. When the weather is extremely cold, the temperature is lower than the limit range, and the electric vehicle battery cannot operate normally.

Accordingly, it is an object of the present invention to provide an electric vehicle battery temperature management system that solves the above problems.

Therefore, the electric vehicle battery temperature management system of the present invention is applicable to a battery module, and the electric vehicle battery temperature management system comprises a temperature management module, a heating module, a cooling module, and a control module.

The temperature management module includes a pair of cooling and heat medium pipes disposed on the battery module, and a heat exchanger disposed on the heat and heat medium pipeline, the cold The heat medium line is used for a temperature regulating liquid flow cycle to provide and remove the heat energy of the battery module.

The heating module is coupled to the heat exchanger and is controlled to provide the temperature regulating fluid thermal energy via the heat exchanger.

The cooling module is coupled to the heat exchanger and is controlled to carry away thermal energy of the temperature regulating fluid via the heat exchanger.

The control module is electrically connected to the heating module and the cooling module to respectively control the heating module and the cooling module to provide and remove the temperature regulating liquid heat energy through the heat exchanger.

The effect of the present invention is that the temperature of the battery module can be maintained in the working temperature range by setting the temperature management module, the heating module, the cooling module, and using the control module for control. The battery module is too high/low temperature to operate normally due to the battery module being charged or discharged or the temperature is cold.

2‧‧‧ Temperature Management Module

4‧‧‧Cooling module

21‧‧‧Chill heat medium pipeline

41‧‧‧Refrigerant piping

22‧‧‧ heat exchanger

42‧‧‧Compressor

23‧‧‧ pump

43‧‧‧Regulator

24‧‧‧Battery temperature sensor

44‧‧‧Expansion valve

25‧‧‧Regulating fluid temperature sensor

5‧‧‧Control Module

3‧‧‧heating module

6‧‧‧Water supply module

31‧‧‧Heat media pipeline

8‧‧‧Battery module

32‧‧‧Regulator

9‧‧‧DC Converter

33‧‧‧Powerplant

Other features and advantages of the present invention will be apparent from the description of the embodiments of the present invention. FIG. 1 is a schematic diagram of an embodiment of an electric vehicle battery temperature management system of the present invention.

Referring to FIG. 1 , an embodiment of an electric vehicle battery temperature management system of the present invention is applied to a battery module 8 and a DC converter 9 . The electric vehicle battery temperature management system includes a temperature management module 2 and a heating module. 3 a cooling module 4, a control module 5, and a water adding module 6.

The temperature management module 2 includes a pair of heat and heat medium tubes 21 disposed in the battery module 8 , a heat exchanger 22 disposed in the heat and heat medium tubes 21 , and a pump 23 disposed in the heat and heat medium tubes 21 . A battery temperature sensor 24 and a regulating liquid temperature sensor 25.

The heat and heat medium line 21 is used for a temperature regulating liquid flow cycle to provide and remove the heat energy of the battery module 8, and the pump 23, the heat exchanger 22, the battery module 8, and the DC converter 9 According to the temperature regulation liquid flow cycle direction, respectively.

Wherein, the temperature regulating liquid may be implemented by using water or a suitable refrigerant or a heat medium, and is not limited thereto.

The pump 23 is configured to provide the kinetic energy of the temperature regulating liquid. The battery temperature sensor 24 senses the temperature of the battery module 8 and transmits the temperature to the control module 5.

The regulating liquid temperature sensor 25 is disposed at the temperature regulating liquid flow outlet of the heat exchanger 22 for sensing the temperature of the temperature regulating liquid and transmitting to the control module 5.

The heating module 3 is connected to the heat exchanger 22, controlled to provide the temperature regulating liquid heat energy via the heat exchanger 22, and includes a heat medium line 31 connected to the heat exchanger 22 for circulating a heat medium. A regulating valve 32 disposed in the heat medium line 31 and a power unit 33 disposed in the heat medium line 31.

The regulating valve 32 is controlled by the control module 5 to regulate the flow rate of the heat medium flowing therethrough.

The power unit 33 is configured to provide the heat energy of the heat medium. In the embodiment, the power unit 33 is an engine (not shown), and the heat medium line 31 is connected to a cooling water line for cooling the engine (not shown). So, you can directly use the waste heat recovery of the engine as a source of heat.

The cooling module 4 is connected to the heat exchanger 22, controlled to carry away the thermal energy of the temperature regulating liquid via the heat exchanger 22, and includes a refrigerant line 41 connected to the heat exchanger 22 for circulating a refrigerant. And a compressor 42 disposed in the refrigerant line 41, a regulating valve 43, and an expansion valve 44, the regulating valve 43 being controlled by the control module 5 to regulate the flow rate of the refrigerant flowing through.

The control module 5 is electrically connected to the heating module 3 and the regulating valves 32 and 43 of the cooling module 4 to respectively control and provide the heating module 3 and the cooling module 4 via the heat exchanger 22 This temperature regulates the thermal energy of the liquid.

The water adding module 6 is connected to the cold heat medium line 21, and when the liquid amount in the cold heat medium line 21 is lower than a predetermined value, the water adding module 6 applies a temperature regulating liquid to the cold heat medium line 21, It is possible to avoid malfunction due to the escape of the temperature regulating fluid in the cold heat medium line 21.

In general use, the battery temperature sensor 24 senses the temperature of the battery module 8 and transmits it to the control module 5. The control module 5 controls the temperature of the battery module 8 when the temperature is less than a lower limit. The regulating valve 32 of the heating module 3 causes the heat medium of the heat medium line 31 to flow through the heat exchanger 22. At this time, the heat medium in the heat medium line 31 passes the heat energy of the power unit 33 through the heat. The exchanger 22 supplies the temperature regulating liquid to the cooling medium line 21 When the temperature regulating liquid flows through the battery module 8, heat energy is transferred to the battery module 8, so that the temperature of the battery module 8 can be raised to a desired temperature interval.

When the temperature of the battery module 8 is greater than an upper limit, the The control module 5 controls the regulating valve 43 of the cooling module 4 to flow the refrigerant of the refrigerant line 41 through the heat exchanger 22. At this time, the refrigerant in the refrigerant line 41 is taken away through the heat exchanger 22. The temperature of the temperature regulating liquid in the cold heat medium line 21, and the temperature adjusting liquid after the temperature is lowered, the heat energy of the battery module 8 is taken away when flowing through the battery module 8, so that the temperature can be reduced. The temperature of the battery module 8 is to the desired temperature range.

In this embodiment, the lower limit value and the upper limit value are respectively 10 °C and 40 °C, but can also have different settings according to actual needs, not limited to this.

The control module 5 can also receive the temperature adjustment by adjusting the temperature The temperature of the temperature adjustment liquid sensed by the device 25, and whether the temperature of the temperature adjustment liquid is actually raised or decreased after adjusting the regulating valves 32, 43 to determine the heating module 3 and the cooling module 4 is normal operation, in addition, when the temperature of the temperature regulating liquid is greater than a regulating liquid upper limit value, the control module 5 controls the regulating valve 32 of the heating module 3 to be closed to stop providing the temperature regulating liquid heat energy; When the temperature of the temperature regulating liquid is less than a lower limit value of the regulating liquid, the control module 5 controls the regulating valve 43 of the cooling module 4 to be closed to stop taking away the heat energy of the temperature regulating liquid, thereby forming a safety protection mechanism. To avoid damage to the battery module 8 or peripheral components due to overheating/supercooling of the temperature regulating fluid.

It is worth mentioning that since the DC converter 9 is also electric One of the components in the vehicle that is prone to heat, so in the present embodiment, the DC converter 9 is disposed on the cold heat medium line 21 after the battery module 8 is connected, so that the temperature regulating liquid flows through the battery module. After the group 8, it will flow through the DC converter 9. Since the operating temperature of the DC converter 9 is 70-80 ° C, which is higher than the operating temperature of the battery module 8 by 10 to 40 ° C, whether it is heating or cooling In the case of the battery module 8, the temperature regulating liquid flowing through the battery module 8 can then be cooled by the DC converter 9.

Through the above description, the advantages of this embodiment can be summarized as follows:

1. By setting the temperature management module 2, the heating module 3, the cooling module 4, and using the control module 5 for control, the temperature of the battery module 8 can be maintained in the working temperature range. The battery module 8 is too high/low temperature to operate normally due to the battery module 8 being charged or discharged or the temperature is cold.

Second, by directly using the engine in the electric vehicle to implement the power unit 33, and connecting the heat medium line 31 to the cooling water pipeline of the engine, the waste heat of the engine can be directly used as a source of heat energy, and on the one hand, the heating element can be saved. On the one hand, the waste heat of the engine can also be recycled, so it is also environmentally friendly in terms of cost savings.

In summary, the object of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent change and modification of the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.

Claims (4)

The utility model relates to an electric vehicle battery temperature management system, which is suitable for being applied to a battery module. The electric vehicle battery temperature management system comprises: a temperature management module, comprising a pair of cold and heat medium pipes arranged by the battery module, and a setting a heat exchanger of the cold heat medium pipeline for circulating a temperature regulating liquid to provide and remove heat energy of the battery module; a heating module connected to the heat exchanger and controlled to pass The heat exchanger provides the temperature regulating liquid heat energy; a cooling module is connected to the heat exchanger, controlled to take away the thermal energy of the temperature regulating liquid through the heat exchanger; and a control module electrically connected to the heating The module and the cooling module respectively control the heating module and the cooling module to provide and remove the temperature regulating liquid heat energy through the heat exchanger; wherein the temperature management module further comprises a battery temperature sensing The battery temperature sensor is configured to sense the temperature of the battery module and transmit the temperature to the control module; the control module controls the heating mode when the temperature of the battery module is less than a lower limit value Providing the temperature adjustment liquid heat energy through the heat exchanger to enable the temperature adjustment liquid to provide thermal energy of the battery module; and the control module controls the cooling module to pass the temperature of the battery module when the temperature of the battery module is greater than an upper limit value The heat exchanger takes away the thermal energy of the temperature regulating liquid to cause the temperature regulating fluid to carry away the thermal energy of the battery module; wherein the temperature management module further comprises a regulating liquid temperature sensor The temperature sensor is used to sense the temperature of the temperature regulating liquid and is sent to the control module. The heating module includes a heat medium pipe connected to the heat exchanger for circulating a heat medium, and a regulating valve disposed in the heat medium pipeline, the regulating valve being controlled by the control module to regulate a flow rate of the heat medium flowing through, the cooling module comprising a heat exchanger connected to the heat exchanger and circulating a refrigerant a refrigerant pipe, a compressor disposed on the refrigerant pipe, a regulating valve, and an expansion valve, the regulating valve being controlled by the control module to adjust a flow rate of the refrigerant flowing through; When the temperature is greater than an upper limit of the adjusting liquid, the control module controls the heating module to stop providing the thermal energy of the temperature regulating liquid, and the control module controls the regulating valve of the heating module to be closed; the temperature of the temperature regulating liquid is less than one When the liquid lower limit value is adjusted, the control module controls the cooling module to stop taking away the heat energy of the temperature regulating liquid, and the control module controls the regulating valve of the cooling module to be closed; the adjusting liquid temperature sensor is disposed at the Heat exchange The temperature adjusting fluid flow outlet. The electric vehicle battery temperature management system of claim 1, wherein the temperature management module further comprises a pump disposed in the cold heat medium pipeline, and the pump, the heat exchanger, and the battery module respectively According to the temperature regulation liquid flow circulation direction is set in order. The electric vehicle battery temperature management system of claim 1, wherein the heating module further comprises a power device disposed in the heat medium pipeline, wherein the power device is configured to provide the heat medium heat energy. The electric vehicle battery temperature management system according to claim 1 further includes a And the water adding module connected to the cold heat medium pipeline, wherein the water adding module adds the temperature regulating liquid to the cold heat medium pipeline when the liquid amount in the cold heat medium pipeline is lower than a predetermined value.