Electric truck battery cooling control system and method

Abstract

The invention discloses an electric truck battery cooling control system and method, and relates to the technical field of vehicle battery cooling, and the system comprises a receiving module which is used for receiving a refrigerating fluid demand temperature value of a battery pack and a wake-up signal and a start-up signal sent by a water cooling unit; the detection module is used for detecting the water outlet temperature of the water chilling unit; the decision module is used for determining the operation mode of the water chilling unit; the control module is used for controlling the water chilling unit to enter a corresponding operation mode; the calculation module is used for calculating the target frequency of a compressor and the target rotating speed of a condenser fan according to the refrigerating fluid required temperature value of the battery pack and the water outlet temperature of the water chilling unit; the control module is further used for controlling the compressor to operate to the target frequency and controlling the condenser fan to operate to the target rotating speed according to the calculation result of the calculation module. The temperature of the cooling water can be accurately controlled, it is ensured that equipment operates within the required temperature range, and the performance and efficiency of the equipment are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle battery cooling, and in particular to a battery cooling control system and method for an electric truck. Background Art

[0002] Electric trucks have developed rapidly in recent years, driven by policy support, technological progress and market demand. Electric trucks are currently in a rapid development stage. With the advancement of technology and the growth of market demand, electric trucks will play an increasingly important role in the future and become one of the important choices in the transportation industry.

[0003] The battery cooling system of an electric truck plays a vital role in electric vehicles. It helps ensure that the battery remains within a suitable temperature range during operation to improve the battery's performance, life, and safety. Battery performance is greatly affected by temperature. Too high or too low a temperature will reduce the battery's output power and life. Therefore, keeping the battery within a suitable operating temperature range is critical to the performance of electric vehicles. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an electric truck battery cooling control system and method.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows: An electric truck battery cooling control system, comprising: A receiving module, used to receive the required temperature value of the refrigerant of the battery pack and the wake-up signal and the start-up signal sent by the water cooling unit; A detection module is used to detect the outlet water temperature of the water cooling unit; A decision module, used to determine the operation mode of the water cooling unit according to the wake-up signal and the start-up signal sent by the water cooling unit; A control module, used to control the water cooling unit to enter a corresponding operation mode according to the judgment result of the decision module; A calculation module, used for calculating the target frequency of the compressor according to the required temperature value of the refrigerant of the battery pack and the outlet water temperature of the water cooling unit when the water cooling unit enters the cooling operation mode; The control module is also used to control the compressor to run to a target frequency and control the condenser fan to run to a target speed according to the calculation result of the calculation module.

[0006] As a preferred solution of the electric truck battery cooling control system described in the present invention, the decision module is used to determine that the operating mode of the water cooling unit is the water pump self-circulation mode when it is judged that there is a wake-up signal for the water cooling unit and the power-on signal is the water pump self-circulation mode power-on signal for three consecutive times; and to determine that the operating mode of the water cooling unit is the cooling mode when it is judged that there is a wake-up signal for the water cooling unit and the power-on signal is the cooling mode power-on signal for three consecutive times.

[0007] As a preferred solution of the electric truck battery cooling control system of the present invention, the control module is used to control the operation of the water pump when the decision module determines that the operation mode of the water cooling unit is the water pump self-circulation mode, and to control the operation of the compressor and condenser fan when the decision module determines that the operation mode of the water cooling unit is the refrigeration mode.

[0008] As a preferred solution of the electric truck battery cooling control system described in the present invention, the calculation module is used to calculate the required cooling load of the battery pack according to the required temperature value of the refrigerant of the battery pack and the water outlet temperature of the water cooling unit, and calculate the target evaporation pressure of the evaporator according to the required cooling load of the battery pack, and calculate the target frequency of the compressor according to the target evaporation pressure of the evaporator.

[0009] The present invention also provides an electric truck battery cooling control method, comprising: Receive the required temperature value of the refrigerant of the battery pack and the wake-up signal and start-up signal sent by the water cooling unit; Detect the outlet water temperature of the water cooling unit; Determine the operation mode of the water cooling unit according to the wake-up signal and the start-up signal sent by the water cooling unit; When it is determined that the operating mode of the water cooling unit is the water pump self-circulation mode, the water pump operation is controlled. When it is determined that the operating mode of the water cooling unit is the refrigeration mode, the target frequency of the compressor is calculated according to the refrigerant demand temperature value of the battery pack and the outlet water temperature of the water cooling unit, and the compressor is controlled to operate to the target frequency, and the condenser fan is controlled to operate to the target speed.

[0010] As a preferred solution of the electric truck battery cooling control method of the present invention, the detection of the outlet water temperature of the water cooling unit includes: Detect the outlet water temperature of the unit through a temperature sensor, and obtain the outlet water temperature of the unit at several detection time points; The unit outlet water temperatures at several detection time points are filtered and averaged to obtain the actual unit outlet water temperature.

[0011] As a preferred solution of the electric truck battery cooling control method of the present invention, the operation mode of the water cooling unit is determined according to the wake-up signal and the start-up signal sent by the water cooling unit, including: When it is determined that there is a wake-up signal for the water cooling unit and the power-on signal is the water pump self-circulation mode power-on signal for three consecutive times, it is determined that the operating mode of the water cooling unit is the water pump self-circulation mode; when it is determined that there is a wake-up signal for the water cooling unit and the power-on signal is the cooling mode power-on signal for three consecutive times, it is determined that the operating mode of the water cooling unit is the cooling mode.

[0012] As a preferred solution of the electric truck battery cooling control method of the present invention, the target frequency of the compressor is calculated according to the required temperature value of the refrigerant of the battery pack and the outlet water temperature of the water cooling unit, including: Calculate the required cooling load of the battery pack according to the required temperature value of the refrigerant of the battery pack and the outlet water temperature of the water cooling unit; Calculate the target evaporation pressure of the evaporator according to the cooling load required by the battery pack; The target frequency of the compressor is calculated based on the target evaporating pressure of the evaporator.

[0013] The beneficial effects of the present invention are: (1) The present invention operates the compressor of the water cooling unit at an appropriate operating frequency according to the cooling load of the battery to be cooled, so that the water cooling unit control system can achieve accurate control of the cooling water temperature, ensure that the equipment operates within the required temperature range, and improve the equipment performance and efficiency.

[0014] (2) The control system provided by the present invention can realize automatic operation and adjust the water temperature according to the set parameters without human intervention, thereby improving the stability and reliability of the system.

[0015] (3) The present invention can adjust the water temperature according to actual needs, avoid energy waste, achieve energy-saving optimization, and reduce operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of a battery cooling control system for an electric truck provided by the present invention; Figure 2 A schematic flow chart of the electric truck battery cooling control method provided by the present invention. DETAILED DESCRIPTION

[0018] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific implementation modes and in combination with the accompanying drawings.

[0019] Figure 1 A schematic diagram of an electric truck battery cooling control system provided in an embodiment of the present application. The system includes a receiving module, a detection module, a decision module, a control module and a calculation module.

[0020] Specifically, the receiving module is used to receive the required temperature value of the refrigerant of the battery pack and the wake-up signal and the start-up signal sent by the water cooling unit.

[0021] It should be noted that there are two types of startup signals issued by the water cooling unit, one is the startup signal of the water pump self-circulation mode, and the other is the startup signal of the refrigeration mode.

[0022] The detection module is used to detect the outlet water temperature of the water cooling unit. Specifically, the actual outlet water temperature of the water cooling unit is detected by a temperature sensor.

[0023] Preferably, to ensure the detection accuracy of the actual water outlet temperature of the water-cooled unit, the detection module will detect the unit's water outlet temperature at multiple different detection time points through a temperature sensor, and then filter and average the unit's water outlet temperatures at these several detection time points to obtain the unit's actual water outlet temperature.

[0024] The decision module is used to determine the operation mode of the water cooling unit according to the wake-up signal and the power-on signal sent by the water cooling unit. Specifically, when the decision module determines that the water cooling unit has a wake-up signal and the power-on signal is a water pump self-circulation mode power-on signal for three consecutive times, the operation mode of the water cooling unit is determined to be the water pump self-circulation mode; when the decision module determines that the water cooling unit has a wake-up signal and the power-on signal is a cooling mode power-on signal for three consecutive times, the operation mode of the water cooling unit is determined to be the cooling mode.

[0025] The control module is used to control the water cooling unit to enter the corresponding operation mode according to the judgment result of the decision module. Specifically, when the decision module determines that the operation mode of the water cooling unit is the water pump self-circulation mode, the control module controls the water pump to operate so that the water cooling unit enters the water pump self-circulation mode. In this operation mode, the water pump drives the coolant to circulate in the pipeline. When the decision module determines that the operation mode of the water cooling unit is the cooling mode, the control module controls the operation of the compressor and the condenser fan.

[0026] The calculation module is used to calculate the target frequency of the compressor according to the required temperature value of the refrigerant of the battery pack and the outlet water temperature of the water cooling unit when the water cooling unit enters the refrigeration operation mode.

[0027] The calculation module calculates the required cooling load of the battery pack according to the required temperature of the refrigerant of the battery pack and the outlet water temperature of the water cooling unit, and then calculates the target evaporation pressure of the evaporator according to the required cooling load of the battery pack. Then, the target frequency of the compressor can be calculated according to the target evaporation pressure of the evaporator. The target speed of the condenser fan is regulated by looking up the table according to the difference between the actual high pressure pressure of the refrigerant and the set target pressure of the refrigerant, and increasing or decreasing the fan speed.

[0028] After the water-cooled unit enters the cooling mode, the control module is used to control the compressor to run to the target frequency and the condenser fan to run to the target speed according to the calculation results of the calculation module, so that the water-cooled unit enters a steady state, cools the coolant, and then cools the battery pack.

[0029] Figure 2 A flow chart of a method for controlling battery cooling of an electric truck provided in an embodiment of the present application. The method comprises the following steps: Step S101: receiving the required temperature value of the refrigerant of the battery pack and the wake-up signal and the start-up signal sent by the water cooling unit.

[0030] Specifically, the water cooling unit sends two types of startup signals, one is a startup signal for the water pump self-circulation mode, and the other is a startup signal for the refrigeration mode.

[0031] Step S102: Detect the outlet water temperature of the water cooling unit.

[0032] Specifically, the unit outlet water temperature at a plurality of different detection time points is detected by a temperature sensor, and then the unit outlet water temperatures at the plurality of detection time points are filtered and averaged to obtain the actual unit outlet water temperature.

[0033] Step S103: determining the operation mode of the water cooling unit according to the wake-up signal and the power-on signal sent by the water cooling unit.

[0034] Specifically, when it is determined that there is a wake-up signal for the water cooling unit and the power-on signal is a water pump self-circulation mode power-on signal for three consecutive times, the operating mode of the water cooling unit is determined to be the water pump self-circulation mode; when it is determined that there is a wake-up signal for the water cooling unit and the power-on signal is a cooling mode power-on signal for three consecutive times, the operating mode of the water cooling unit is determined to be the cooling mode.

[0035] Step S104: When it is determined that the operating mode of the water cooling unit is the water pump self-circulation mode, the water pump is controlled to operate; when it is determined that the operating mode of the water cooling unit is the refrigeration mode, the target frequency of the compressor is calculated according to the refrigerant demand temperature value of the battery pack and the outlet water temperature of the water cooling unit, and the compressor is controlled to operate to the target frequency, and the condenser fan is controlled to operate to the target speed.

[0036] Specifically, when it is determined that the operation mode of the water cooling unit is the water pump self-circulation mode, the water pump is controlled to operate so that the water cooling unit enters the water pump self-circulation mode. In this operation mode, the water pump drives the coolant to circulate in the pipeline.

[0037] When the operation mode of the water cooling unit is determined to be the cooling mode, the compressor and the condenser fan are controlled to operate. Among them, the operating frequency of the compressor and the speed of the condenser fan need to be calculated according to the actual operation conditions. First, the required cooling load of the battery pack is calculated according to the required temperature value of the refrigerant of the battery pack and the outlet water temperature of the water cooling unit, and then the target evaporation pressure of the evaporator is calculated according to the required cooling load of the battery pack, and then the target frequency of the compressor is calculated according to the target evaporation pressure of the evaporator.

[0038] Therefore, the technical solution of the present application operates the compressor of the water cooling unit at an appropriate operating frequency according to the cold load of the battery to be cooled, so that the water cooling unit control system can achieve precise control of the cooling water temperature, ensure that the equipment operates within the required temperature range, and improve equipment performance and efficiency.

[0039] In addition to the above embodiments, the present invention may also have other implementation modes; any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present invention.

Claims

1. An electric truck battery cooling control system, characterized in that: include: A receiving module, used to receive the required temperature value of the refrigerant of the battery pack and the wake-up signal and the start-up signal sent by the water cooling unit; A detection module is used to detect the outlet water temperature of the water cooling unit; A decision module, used to determine the operation mode of the water cooling unit according to the wake-up signal and the start-up signal sent by the water cooling unit; A control module, used to control the water cooling unit to enter a corresponding operation mode according to the judgment result of the decision module; A calculation module, used for calculating the target frequency of the compressor according to the required temperature value of the refrigerant of the battery pack and the outlet water temperature of the water cooling unit when the water cooling unit enters the cooling operation mode; The control module is also used to control the compressor to run to a target frequency and control the condenser fan to run to a target speed according to the calculation result of the calculation module.

2. The electric truck battery cooling control system according to claim 1, characterized in that: The decision module is used to determine that the operating mode of the water cooling unit is the water pump self-circulation mode when it is determined that there is a wake-up signal in the water cooling unit and the power-on signal is the water pump self-circulation mode power-on signal for three consecutive times; and to determine that the operating mode of the water cooling unit is the cooling mode when it is determined that there is a wake-up signal in the water cooling unit and the power-on signal is the cooling mode power-on signal for three consecutive times.

3. The electric truck battery cooling control system according to claim 1, characterized in that: The control module is used to control the operation of the water pump when the decision module determines that the operation mode of the water cooling unit is the water pump self-circulation mode, and to control the operation of the compressor and the condenser fan when the decision module determines that the operation mode of the water cooling unit is the refrigeration mode.

4. The electric truck battery cooling control system according to claim 1, characterized in that: The calculation module is used to calculate the required cooling load of the battery pack according to the required temperature value of the refrigerant of the battery pack and the outlet water temperature of the water cooling unit, calculate the target evaporation pressure of the evaporator according to the required cooling load of the battery pack, and calculate the target frequency of the compressor according to the target evaporation pressure of the evaporator.

5. A method for controlling battery cooling of an electric truck, characterized in that: include: Receive the required temperature value of the refrigerant of the battery pack and the wake-up signal and start-up signal sent by the water cooling unit; Detect the outlet water temperature of the water cooling unit; Determine the operation mode of the water cooling unit according to the wake-up signal and the start-up signal sent by the water cooling unit; When it is determined that the operating mode of the water cooling unit is the water pump self-circulation mode, the water pump operation is controlled. When it is determined that the operating mode of the water cooling unit is the refrigeration mode, the target frequency of the compressor is calculated according to the refrigerant demand temperature value of the battery pack and the outlet water temperature of the water cooling unit, and the compressor is controlled to operate to the target frequency, and the condenser fan is controlled to operate to the target speed.

6. The electric truck battery cooling control method according to claim 5, characterized in that: The detection of the outlet water temperature of the water cooling unit comprises: Detect the outlet water temperature of the unit through a temperature sensor, and obtain the outlet water temperature of the unit at several detection time points; The unit outlet water temperatures at several detection time points are filtered and averaged to obtain the actual unit outlet water temperature.

7. The electric truck battery cooling control method according to claim 5, characterized in that: Determining the operation mode of the water cooling unit according to the wake-up signal and the power-on signal sent by the water cooling unit includes: When it is determined that there is a wake-up signal for the water cooling unit and the power-on signal is the water pump self-circulation mode power-on signal for three consecutive times, it is determined that the operating mode of the water cooling unit is the water pump self-circulation mode; when it is determined that there is a wake-up signal for the water cooling unit and the power-on signal is the cooling mode power-on signal for three consecutive times, it is determined that the operating mode of the water cooling unit is the cooling mode.

8. The electric truck battery cooling control method according to claim 5, characterized in that: Calculating the target frequency of the compressor according to the required temperature value of the refrigerant of the battery pack and the outlet water temperature of the water cooling unit includes: Calculate the required cooling load of the battery pack according to the required temperature value of the refrigerant of the battery pack and the outlet water temperature of the water cooling unit; Calculate the target evaporation pressure of the evaporator according to the cooling load required by the battery pack; The target frequency of the compressor is calculated based on the target evaporating pressure of the evaporator.

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