KR20210076547A - Method and system for vehicle battery cooling control - Google Patents

Abstract

According to the present invention, a battery cooling control method for a vehicle comprises: a step of monitoring battery voltage, battery temperature, and battery current information when charging a battery of a vehicle; a step of determining a charging step in a battery charging map based on the monitored current temperature of the battery, the battery voltage, and the battery current information and pre-stored battery charging map; a step of determining whether the current temperature of the battery is temperature having the maximum charging current in response to the charging step; and a step of cooling or heating the battery for charging by using the maximum charging current when the current temperature of the battery is not the temperature having the maximum charging current.

Description

A method and system for controlling the cooling of a vehicle battery {METHOD AND SYSTEM FOR VEHICLE BATTERY COOLING CONTROL}

The present invention relates to a vehicle battery cooling control method and system.

In general, EV vehicles allow maximum charging current from the normal temperature region due to the characteristics of the battery charging map, but next-generation EV batteries have the characteristic of having the maximum charging current in the high temperature region.

℃?)영역에 온도분포를 하도록 냉각제어를 해야 했다. EV 차량은 충전구에 급속충전기를 삽입하는 순간 냉각장치(칠러)도 함께 구동되며 EWP에 의한 냉각수 순환이 이루어진다.Therefore, during EV fast charging, the temperature rise due to current is suppressed as much as possible at room temperature (25

℃?), it was necessary to control the cooling to distribute the temperature in the region. In an EV vehicle, the cooling device (chiller) is also driven as soon as the fast charger is inserted into the charging port, and coolant circulation is made by the EWP.

However, when the above cooling mode is applied to a battery having a maximum charging current characteristic in a high temperature region, the maximum current charging region is reduced, and thus the charging speed is reduced.

The present invention proposes a method and system for controlling cooling of a vehicle battery.

More specifically, it provides a method and system for controlling the cooling of a vehicle battery while simultaneously considering maximizing a battery current, protecting a battery from overheating, and preventing a battery output limitation due to high temperature during high-current rapid charging.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

In order to solve the above technical problem, the vehicle battery cooling control method is based on the battery temperature when charging the vehicle battery. monitoring battery voltage and battery current information; The monitored battery current temperature. determining a charging step in the battery charging map based on battery voltage and battery current information and a previously stored battery charging map; determining whether the current temperature of the battery is a temperature having a maximum charging current corresponding to the charging step; and when the current temperature of the battery is not a temperature having the maximum charging current, controlling the battery to cool or increase the temperature in order to charge the battery with the maximum charging current.

According to an embodiment, the controlling to cool or increase the temperature of the battery may include determining whether the current temperature of the battery is less than a temperature having a maximum charging current.

According to an embodiment, the controlling to cool or increase the temperature of the battery may further include determining whether the current temperature of the battery is greater than or equal to a chiller driving temperature when the current temperature of the battery is less than a temperature having a maximum charging current.

According to an embodiment, the controlling to cool or increase the temperature of the battery may include: when the current battery temperature is higher than or equal to a temperature having a maximum charging current, determining whether the current battery temperature exceeds a temperature increase system operating target temperature; controlling the PTC heater, EWP, and chiller in a first battery cooling suppression mode to turn off all of the current temperature of the battery when the temperature exceeds the operating target temperature of the temperature increase system; and controlling the temperature of the battery to rise by turning on the PTC heater when the current battery temperature does not exceed the operating target temperature of the temperature increase system after the first battery cooling suppression mode. .

According to an embodiment, the controlling to cool or increase the temperature of the battery may include: when the current battery temperature is not higher than or equal to the chiller driving temperature, controlling the PTC heater, the EWP, and the chiller to a first battery cooling suppression mode for turning off all; may further include.

According to an embodiment, the controlling to cool or increase the temperature of the battery may include, when the current battery temperature is equal to or higher than a chiller driving temperature, entering a battery cooling mode in which each of the EWP and the chiller is driven at a maximum rpm; may include.

After entering the battery cooling mode, when the current temperature of the battery is less than the temperature having the maximum charging current, the EWP operates at a preset target rpm, and the chiller is turned off, controlling the second battery cooling suppression mode; may include more.

According to an embodiment, after performing the battery cooling or temperature raising control, determining whether the current temperature of the battery is equal to or greater than a chiller driving temperature; increasing the charging step according to the reaching of the upper limit voltage for each charging step when the current temperature of the battery is not equal to or higher than the chiller driving temperature; and determining whether the increased charging step is the final step of the charging map.

According to an embodiment, when the current temperature of the battery is equal to or higher than the chiller driving temperature, entering a battery cooling mode in which each of the EWP and the chiller is driven at maximum rpm; may further include. In the final step, performing constant voltage charging; and terminating charging when the voltage of the battery reaches a target charging limit voltage. may further include.

In order to solve the above technical problem, the vehicle battery cooling control system is the battery temperature when charging the vehicle battery. a battery including a BMS for monitoring battery voltage and battery current information; a chiller for lowering the temperature of the coolant flowing into the battery; a PTC heater for increasing the temperature of the coolant flowing into the battery; EWP for injecting the coolant cooled by the chiller into the battery; and a control unit for controlling the chiller, the PTC heater, and the EWP, wherein the control unit is the monitored current temperature of the battery. determining a charging step in the battery charging map based on battery voltage, battery current information, and a pre-stored battery charging map, determining whether the current battery temperature is a temperature having a maximum charging current corresponding to the charging step, and the battery When the current temperature is not a temperature having the maximum charging current, it is possible to control to cool or increase the temperature of the battery in order to be charged with the maximum charging current.

The vehicle battery cooling control method and system according to the present invention have the advantage of improving R&H and reverse rotation driving performance of a tow vehicle and a cargo trailer through tire steering angle control of a cargo trailer.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are provided to help understanding of the present invention, and provide embodiments of the present invention together with a detailed description. However, the technical features of the present invention are not limited to specific drawings, and features disclosed in each drawing may be combined with each other to form a new embodiment.
1 is a block diagram illustrating a configuration of a device including a vehicle battery according to an embodiment of the present invention.
2 is a diagram illustrating a battery charging map according to a vehicle according to an embodiment of the present invention.
3 is a diagram illustrating a flow of battery charging control according to an embodiment of the present invention.

Hereinafter, an apparatus and various methods to which embodiments of the present invention are applied will be described in more detail with reference to the drawings. The suffixes "module" and "part" for the components used in the following description are given or mixed in consideration of only the ease of writing the specification, and do not have a meaning or role distinct from each other by themselves.

In the description of the embodiment, in the case of being described as being formed in "above (above) or below (below)", "before (front) or after (rear)" of each component, "above (above) or below" "(below)" and "before (front) or after (rear)" include both components formed by direct contact with each other or one or more other components disposed between the two components.

In addition, in describing the components of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the components from other components, and the essence, order, or order of the components are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but another component is between each component. It should be understood that elements may be “connected,” “coupled,” or “connected.”

In addition, terms such as "comprises", "comprises" or "have" described above mean that the corresponding component may be embedded, unless otherwise stated, so that other components are excluded. Rather, it should be construed as being able to further include other components. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms commonly used, such as those defined in the dictionary, should be interpreted as being consistent with the meaning of the context of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

A vehicle to which the vehicle system of the present invention is applied may be provided in a vehicle having a battery, such as an electric vehicle (EV) or a plug hybrid electric vehicle (PHEV), and a cooling system for cooling the battery through a cooling device.

1 is a block diagram showing the configuration of a vehicle battery cooling control system according to an embodiment of the present invention.

As shown in FIG. 1 , the vehicle battery cooling control system according to an embodiment of the present invention includes a battery 100 , a chiller 200 , a PTC heater 300 , an Electronic Water Pump (EWP) 400 , and a control unit 500 . ) may be included.

The battery 100 is a battery that provides a driving voltage to a vehicle, and may be a water-cooled battery. The battery 100 may include a Battery Management System (BMS) 110 . The BMS 110 includes a temperature sensor (not shown) for measuring the temperature of the battery 100, a current sensor (not shown) for measuring the current of the battery, and a voltage sensor (not shown) for measuring the voltage of the battery. can be provided. The BMS 110 may measure the temperature of the battery 100 , the current of the battery 100 , and the voltage of the battery 100 and provide it to the controller 500 .

The chiller 200 is driven according to a control signal of the controller 500 and serves to cool the coolant. According to an embodiment, the chiller 200 may be an air conditioner compressor (A/C compressor).

The PTC (Positive Temperature Coefficient) heater 300 may increase the battery temperature by heating the coolant circulating in the battery. In this case, the PTC heater 300 can be driven only in a low-temperature state where the battery is 0 degrees or less. The PTC heater 300 may have a short heating time for rapidly improving battery output at low temperatures.

The EWP 400 serves to cool the battery 100 by introducing the coolant cooled by the chiller 220 into the battery 100 .

The controller 500 may monitor battery temperature, battery voltage, and battery current information during rapid charging of the battery, and perform cooling of the battery based thereon. In this case, the controller 500 may control cooling of the battery based on a pre-stored battery charge map. Here, the charging map is a map in which the charging voltage and current of the battery are defined according to the battery temperature and the battery charging step. According to an embodiment, the charging map set based on the battery temperature and the battery charging step may be represented as shown in FIG. 2 below.

The control unit 500 monitors the current temperature of the battery. The charging step in the battery charging map may be determined based on the battery voltage and battery current information and the pre-stored battery charging map.

The controller 500 may determine whether the current charging current is the maximum current among the charging currents for each temperature section at the time of initial charging due to the insertion of the battery charger or when the step is changed according to the voltage increase during battery charging.

Based on the battery charging map, the controller 500 may perform battery cooling in the maximum charging current temperature region during charging for overtemperature protection due to the increase in battery temperature.

Thereafter, when the current charging current is the maximum current among the charging currents for each temperature section, the controller 500 may continue charging at the current battery temperature. Accordingly, it is possible to maintain the current charging current.

In addition, when the current charging current is not the maximum current among the charging currents for each temperature section, the controller 500 may perform cooling or temperature increase control to the maximum charging current temperature. In this case, the controller 500 may control the temperature increase to operate the PTC heater 300 when the current battery temperature is less than or equal to the target temperature for operating the temperature increase system, that is, in a low temperature environment. And, when the current battery temperature exceeds the target temperature for operating the temperature raising system, the controller 500 may perform the first battery cooling suppression mode.

The first battery cooling suppression mode may increase the temperature of the battery up to the maximum charging current temperature on the charging map by suppressing the cooling water circulation and the chiller driving up to the chiller driving temperature (T_target_chiller driving temperature). In this case, the temperature increase of the battery may be performed by heating the battery by the rapid charging current.

Meanwhile, when the current battery temperature (T_current temperature) is less than the chiller driving temperature (T_target_chiller driving), the controller 500 may perform the first battery cooling suppression mode. In some embodiments, the chiller driving temperature may be 35 degrees.

In addition, the control unit 500 may perform the battery cooling mode when the current temperature (T_current temperature) is equal to or greater than the chiller driving temperature (T_target_chiller driving) to protect the temperature from rising during rapid charging. In this case, the control unit 500 may control the EWP 400 to operate to circulate the cooling water, and control to drive the chiller 200 to cool the cooling water.

According to an embodiment, in the case of rapid charging, the control unit 500 sets the current temperature (T_current temperature) to the chiller driving temperature (T_target_chiller driving temperature) because the temperature of the battery does not drop immediately after the cooling mode is operated and the temperature tends to rise continuously. ) or higher, in order to realize the maximum cooling performance, a cooling mode for controlling the rpm of the EWP 400 and the rpm of the chiller 200 to be driven to the maximum may be performed.

Thereafter, the control unit 500 controls the chiller 200 to turn off when the battery reaches the cooling target temperature according to the cooling mode and the current temperature (T_current temperature) is equal to or higher than the chiller driving temperature (T_target_chiller driving). , it is possible to control the EWP 400 to operate at a preset target rpm so that the cooling water circulation by driving the EWP 400 is maintained.

Since the charging map performs step-by-step charging according to voltage, the controller 500 may repeat cooling after confirming the maximum charging current temperature corresponding to the voltage when moving step-by-step for each voltage.

The control unit 500 may perform a constant voltage charging (CV charging) after the charging step rises according to the charging progress and the final step is reached.

The controller 500 may end charging when the voltage of the battery reaches a target charging limit voltage according to the constant voltage charging.

2 is a diagram illustrating a battery charging map according to a vehicle according to an embodiment of the present invention.

Referring to FIG. 2 , the horizontal axis of the charging map indicates the battery temperature, T1 to T2, T2 to T3. It can be divided into T3~T4, T5~T6, T6~T7, T7 or higher. The vertical axis of the charging map represents the battery charging step, and may be divided into 1 to 10 steps.

Since the charging map performs step-by-step charging according to voltage, it is possible to provide the maximum charging current temperature corresponding to the voltage when stepping by voltage. The control unit 500 may drive the cooling mode based on the charging map.

As shown in FIG. 2 , when the battery temperature is T1 to T3, CV may be maintained at the step-7 cut-off voltage until the corresponding temperature slow charging current. And, when the battery temperature is T3 or higher, CV may be maintained at the step-10 cut-off voltage until the corresponding temperature slow charging current.

In this case, the battery having the maximum charging current characteristic in the high temperature region has the characteristic of having the maximum charging current in the high temperature region T3 to T7. Therefore, it is possible to control the cooling of the battery to maintain the maximum charging current temperature range T6 (for example, 35℃) when charging the battery.

3 is a diagram illustrating a flow of battery charging control according to an embodiment of the present invention.

Referring to FIG. 3 , the vehicle battery cooling control system may start rapid charging when the rapid charger is inserted ( S101 ). In this case, the vehicle battery cooling control system may charge the battery according to the nth charging step of the charging map.

After the step S101, the vehicle battery cooling control system may determine whether the current battery temperature is a temperature having the maximum charging current corresponding to the charging step (S102).

After step S102, if the current battery temperature is not the temperature having the maximum charging current (no in S102), the vehicle battery cooling control system may control the cooling or temperature rise of the battery to charge the battery with the maximum charging current having the maximum charging current. There is (S103).

After the step S103, the vehicle battery cooling control system may determine whether the current temperature of the battery is less than the temperature having the maximum charging current (S104).

After step S104, when the current battery temperature is not less than the temperature having the maximum charging current (No in S104), the vehicle battery cooling control system may determine whether the current battery temperature is equal to or greater than the chiller driving temperature (S105).

After the step S105, when the current battery temperature is equal to or higher than the chiller driving temperature (Yes in S105), the vehicle battery cooling control system may enter the battery cooling mode (S106).

Meanwhile, after the step S105, when the current battery temperature is not equal to or higher than the chiller driving temperature (NO in S105), the first battery cooling suppression mode may be controlled (S122). After the step S122, the vehicle battery cooling control system may determine whether the current temperature of the battery is equal to or greater than the chiller driving temperature (S109).

After step S106, the vehicle battery cooling control system may determine whether the current battery temperature is less than the temperature having the maximum charging current (S107). After the step S107, when the current battery temperature is not equal to or less than the maximum temperature of the charging current (No in S107), the vehicle battery cooling control system may enter the battery cooling mode (S106).

Meanwhile, after the step S107, when the current battery temperature is equal to or less than the maximum temperature of the charging current (Yes in S107), the vehicle battery cooling control system may control the second battery cooling suppression mode (S108).

After the step S108, the vehicle battery cooling control system may determine whether the current temperature of the battery is equal to or greater than the chiller driving temperature (S109).

On the other hand, after the step S103, when the current battery temperature is less than the temperature having the maximum charging current (yes in S104), the vehicle battery cooling control system may determine whether the current battery temperature exceeds the operating target temperature of the temperature increase system (S120) .

After the step S120, when the current battery temperature does not exceed the operating target temperature of the temperature increase system (No in S120), the vehicle battery cooling control system may control the battery temperature to increase (S121). In this case, the PTC heater 300 may be controlled ON through the battery temperature increase control. After the battery temperature raising step, step S120 may be performed again.

In addition, after the step S120, when the current battery temperature exceeds the operating target temperature of the temperature increase system (yes in S120), the vehicle battery cooling control system may control the first battery cooling suppression mode (S122).

After the step S122, the vehicle battery cooling control system may determine whether the current temperature of the battery is equal to or greater than the chiller driving temperature (S109).

Meanwhile, after the step S101, when the temperature is not at the maximum charging current (yes in S102), the vehicle battery cooling control system may maintain the current charging current (S130). After the step S130, the vehicle battery cooling control system may determine whether the current temperature of the battery is equal to or greater than the chiller driving temperature (S109).

After step S109, when the current battery temperature is equal to or higher than the chiller driving temperature (yes in S109), the vehicle battery cooling control system may enter the battery cooling mode (S106).

On the other hand, after the step S109, when the current battery temperature is not higher than the chiller driving temperature (No in S109), the vehicle battery cooling control system may determine whether the charging step is increased according to the reaching the upper limit voltage for each step (S110).

After the step S110, when the charging step is not increased (No in S110), the vehicle battery cooling control system may maintain the current charging current (S130).

On the other hand, after the step S110, when the charging step is increased (YES in S110), the vehicle battery cooling control system may determine whether the increased charging step (N+1) is equal to or greater than the final step (step N_final) (S111).

After the step S111, if the charging step is not more than the final step (no in S111), the vehicle battery cooling control system may re-enter the step (S102) of determining whether the temperature having the maximum charging current in the current charging step n is have.

On the other hand, after the step S111, when the charging step is greater than or equal to the final step (YES in S111), the vehicle battery cooling control system may CV charge when the target charging limit voltage is reached (S112).

After the step S112, the vehicle battery cooling control system may end charging when the target SOC is reached or the battery upper limit voltage is reached (S113).

The method according to the above-described embodiment may be produced as a program to be executed on a computer and stored in a computer-readable recording medium. Examples of the computer-readable recording medium include ROM, RAM, CD-ROM, magnetic There are tapes, floppy disks, and optical data storage devices. The computer-readable recording medium is distributed in network-connected computer devices, so that the computer-readable code can be stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing the above-described method can be easily inferred by programmers in the technical field to which the embodiment belongs.

100: battery
200: chiller
300: PTC heater
400: EWP
500: control

Claims (19)

Battery temperature when charging the vehicle's battery. monitoring battery voltage and battery current information;
The monitored battery current temperature. determining a charging step in the battery charging map based on battery voltage and battery current information and a previously stored battery charging map;
determining whether the current temperature of the battery is a temperature having a maximum charging current corresponding to the charging step; and
When the current temperature of the battery is not a temperature having a maximum charging current, controlling the battery to cool or increase the temperature in order to be charged with the maximum charging current;
A method for controlling the cooling of a vehicle battery. The method of claim 1,
The step of controlling the battery to cool or increase the temperature,
Determining whether the current temperature of the battery is less than a temperature having a maximum charging current;
A method for controlling the cooling of a vehicle battery. 3. The method of claim 2,
The step of controlling the battery to cool or increase the temperature,
When the current temperature of the battery is less than a temperature having a maximum charging current, determining whether the current temperature of the battery is greater than or equal to a chiller driving temperature; further comprising
A method for controlling the cooling of a vehicle battery. 3. The method of claim 2,
The step of controlling the battery to cool or increase the temperature,
determining whether the current temperature of the battery exceeds a target temperature for operating a temperature increase system when the current temperature of the battery is greater than or equal to a temperature having a maximum charging current;
controlling the PTC heater, EWP, and chiller in a first battery cooling suppression mode for turning off all of the PTC heater, EWP, and chiller when the current battery temperature exceeds the operating target temperature of the temperature increase system; and
After the first battery cooling suppression mode, when the current temperature of the battery does not exceed the operating target temperature of the temperature raising system, turning on the PTC heater to control the temperature of the battery to rise; further comprising
A method for controlling the cooling of a vehicle battery. 4. The method of claim 3,
The controlling to cool or increase the temperature of the battery may include: when the current temperature of the battery is not higher than or equal to the chiller driving temperature, controlling the PTC heater, the EWP, and the chiller in a first battery cooling suppression mode to OFF; further comprising
A method for controlling the cooling of a vehicle battery. 4. The method of claim 3,
The step of controlling the battery to cool or increase the temperature,
entering a battery cooling mode in which each of the EWP and the chiller is driven at a maximum rpm when the current temperature of the battery is equal to or higher than the chiller driving temperature; and
After entering the battery cooling mode, when the current temperature of the battery is less than the temperature having the maximum charging current, the EWP operates at a preset target rpm, and the chiller is turned off, controlling the second battery cooling suppression mode; more containing
A method for controlling the cooling of a vehicle battery. The method of claim 1,
determining whether the current temperature of the battery is equal to or greater than a chiller driving temperature after performing the battery cooling or temperature increase control;
increasing the charging step according to reaching the upper limit voltage for each charging step when the current temperature of the battery is not equal to or higher than the chiller driving temperature; and
Determining whether the increased charging step is the final step of the charging map; further comprising
A method for controlling the cooling of a vehicle battery. 8. The method of claim 7,
When the current battery temperature is equal to or higher than the chiller driving temperature, entering a battery cooling mode in which each of the EWP and the chiller is driven at maximum rpm; further comprising
A method for controlling the cooling of a vehicle battery. 8. The method of claim 7
performing constant voltage charging when it is the final step of the charging map; and
terminating charging when the voltage of the battery reaches a target charging limit voltage; further comprising
A method for controlling the cooling of a vehicle battery. A computer-readable recording medium in which a program for realizing the method for controlling cooling of a vehicle battery according to any one of claims 1 to 9 is recorded. Battery temperature when charging the vehicle's battery. a battery including a BMS for monitoring battery voltage and battery current information;
a chiller for lowering the temperature of the coolant flowing into the battery;
a PTC heater for increasing the temperature of the coolant flowing into the battery;
EWP for injecting the coolant cooled by the chiller into the battery; and
A control unit for controlling the chiller, the PTC heater, and the EWP,
the control unit
The monitored battery current temperature. determining a charging step in the battery charging map based on the battery voltage and battery current information and the pre-stored battery charging map;
It is determined whether the current temperature of the battery is a temperature having a maximum charging current corresponding to the charging step,
When the current temperature of the battery is not a temperature having the maximum charging current, controlling to cool or increase the temperature of the battery in order to charge it with the maximum charging current
Vehicle battery cooling control system. 12. The method of claim 11,
the control unit
Determining whether the current temperature of the battery is less than the temperature having the maximum charging current
Vehicle battery cooling control system. 13. The method of claim 12,
the control unit
When the current temperature of the battery is less than the temperature having the maximum charging current, determining whether the current temperature of the battery is equal to or greater than the chiller driving temperature
Vehicle battery cooling control system. 13. The method of claim 12,
the control unit
It is determined whether the current temperature of the battery exceeds the operating target temperature of the temperature increase system,
When the current temperature of the battery exceeds the operating target temperature of the temperature raising system, the PTC heater, the EWP, and the chiller are all turned off in a first battery cooling suppression mode,
After the first battery cooling suppression mode, when the current battery temperature does not exceed the temperature increase system operation target temperature, the PTC heater is turned on to control the temperature of the battery to rise
Vehicle battery cooling control system. 14. The method of claim 13,
the control unit
If the current temperature of the battery is not higher than the chiller operating temperature,
Controlling the PTC heater, the EWP, and the chiller in the first battery cooling suppression mode
Vehicle battery cooling control system. 14. The method of claim 13,
the control unit
When the current temperature of the battery is equal to or higher than the chiller driving temperature, the EWP and the chiller enter a battery cooling mode in which each is driven at the maximum rpm,
After entering the battery cooling mode, when the current temperature of the battery is less than the temperature having the maximum charging current, the EWP operates at a preset target rpm, and the chiller is controlled in a second battery cooling suppression mode that is OFF
Vehicle battery cooling control system. 12. The method of claim 11,
the control unit
After performing the battery cooling or temperature raising control, it is determined whether the current temperature of the battery is equal to or greater than the chiller driving temperature,
When the current temperature of the battery is not higher than the chiller driving temperature, the charging step increases according to reaching the upper limit voltage for each charging step,
Determining whether the increased charging step is the final step of the charging map
Vehicle battery cooling control system. 18. The method of claim 17,
the control unit
When the current temperature of the battery is equal to or higher than the chiller driving temperature, the EWP and the chiller enter a battery cooling mode in which each is driven at the maximum rpm.
Vehicle battery cooling control system. 18. The method of claim 17,
the control unit
In the case of the final step of the charging map, constant voltage charging is performed,
When the voltage of the battery reaches the target charging limit voltage, charging is terminated.
Vehicle battery cooling control system.

Images