CN109599607B - Temperature regulation system for vehicle-mounted battery - Google Patents

Temperature regulation system for vehicle-mounted battery Download PDF

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Publication number
CN109599607B
CN109599607B CN201710920234.1A CN201710920234A CN109599607B CN 109599607 B CN109599607 B CN 109599607B CN 201710920234 A CN201710920234 A CN 201710920234A CN 109599607 B CN109599607 B CN 109599607B
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battery
temperature
vehicle
power
cooling
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CN109599607A (en
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伍星驰
谈际刚
王洪军
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BYD Co Ltd
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BYD Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
    • B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H1/00885—Controlling the flow of heating or cooling liquid, e.g. valves or pumps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/635—Control systems based on ambient temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
    • H01M10/663—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
    • B60H2001/00307—Component temperature regulation using a liquid flow
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Secondary Cells (AREA)
  • Automation & Control Theory (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses a temperature adjusting system of a vehicle-mounted battery, which comprises: the vehicle-mounted air conditioning module comprises a refrigeration branch and battery cooling branches connected in series with the refrigeration branch, wherein the refrigeration branch comprises at least one compressor and a condenser connected with the compressor, and each battery cooling branch comprises a heat exchanger in one-to-one correspondence with the compressor and a valve connected with the heat exchanger; the battery temperature adjusting module is connected with the battery cooling branch to form a heat exchange flow path; and the air conditioner is connected with the vehicle-mounted air conditioning module and the battery temperature adjusting module and is used for adjusting the temperature of the battery. The temperature adjusting system can adjust the temperature when the temperature of the vehicle-mounted battery is too high or too low, so that the temperature of the vehicle-mounted battery is maintained in a preset range, and the condition that the performance of the vehicle-mounted battery is influenced by the temperature is avoided.

Description

Temperature regulation system for vehicle-mounted battery
Technical Field
The invention relates to the technical field of automobiles, in particular to a temperature adjusting system of a vehicle-mounted battery.
Background
At present, the performance of a vehicle-mounted battery of an electric vehicle is greatly influenced by the climate environment, and the performance of the vehicle-mounted battery is influenced by too high or too low ambient temperature, so that the temperature of the vehicle-mounted battery needs to be adjusted to maintain the temperature within a preset range.
In the related art, for areas with hot climate environments, a battery cooling system is added in an electric automobile to reduce the temperature of an on-board battery when the temperature of the on-board battery is too high; in areas with cold climate, a battery heating system is added to the electric vehicle to raise the temperature of the vehicle battery when the temperature is too low.
However, in hot summer and cold winter, the above method cannot simultaneously solve the problems of too high temperature and too low temperature of the vehicle-mounted battery, and the method for adjusting the temperature of the vehicle-mounted battery is rough, and cannot accurately control the heating power and the cooling power according to the actual condition of the vehicle-mounted battery, so that the temperature of the vehicle-mounted battery cannot be maintained within the preset range.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, an object of the present invention is to provide a temperature adjustment system for an in-vehicle battery, which can adjust the temperature of the in-vehicle battery when the temperature of the in-vehicle battery is too high or too low, so as to maintain the temperature of the in-vehicle battery within a preset range, thereby avoiding the occurrence of a situation in which the performance of the in-vehicle battery is affected by the temperature.
To achieve the above object, an embodiment of the present invention provides a temperature adjustment system for a vehicle-mounted battery, including: the vehicle-mounted air conditioning module comprises a refrigeration branch and battery cooling branches connected with the refrigeration branch in series, wherein the refrigeration branch comprises at least one compressor and a condenser connected with the compressor, and each battery cooling branch comprises a heat exchanger in one-to-one correspondence with the compressor and a valve connected with the heat exchanger; the battery temperature adjusting module is connected with the battery cooling branch to form a heat exchange flow path; and the controller is connected with the vehicle-mounted air conditioning module and the battery temperature adjusting module and is used for adjusting the temperature of the battery.
According to the temperature adjustment system of the vehicle-mounted battery of the embodiment of the invention, the controller controls the battery temperature adjustment module to adjust the temperature of the battery. Therefore, the system can adjust the temperature when the temperature of the vehicle-mounted battery is too high or too low, so that the temperature of the vehicle-mounted battery is maintained in a preset range, and the condition that the performance of the vehicle-mounted battery is influenced by the temperature is avoided.
In addition, the temperature adjustment system of the vehicle-mounted battery proposed according to the above-described embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, the temperature adjustment system for a vehicle-mounted battery further includes: and the battery state detection module is connected with the battery and is used for detecting the current of the battery.
According to one embodiment of the invention, the battery temperature adjusting module comprises a pump, a first temperature sensor, a second temperature sensor and a flow rate sensor which are arranged on the heat exchange flow path, and the pump, the first temperature sensor, the second temperature sensor and the flow rate sensor are connected with the controller, wherein the pump is used for enabling the medium in the heat exchange flow path to flow; the first temperature sensor is used for detecting the inlet temperature of the medium flowing into the battery; the second temperature sensor is used for detecting the outlet temperature of the medium flowing out of the battery; the flow velocity sensor is used for detecting the flow velocity of the medium in the heat exchange flow path.
According to an embodiment of the present invention, the battery temperature adjusting module further includes: and the heater is connected with the controller and is used for heating the medium in the heat exchange flow path.
According to an embodiment of the present invention, the battery temperature adjusting module further includes: a media container disposed on the heat exchange flow path, the media container for storing and providing media to the heat exchange flow path.
According to one embodiment of the invention, the controller comprises: the system comprises a battery management controller, a battery thermal management controller and a vehicle-mounted air conditioner controller, wherein the battery management controller is connected with a battery state detection module and is used for acquiring the required power for regulating the temperature of the battery; the battery thermal management controller is connected with the pump, the first temperature sensor, the second temperature sensor, the flow rate sensor and the heater, and is used for acquiring the temperature regulation actual power of the battery and regulating the power of the heater according to the temperature regulation required power and the temperature regulation actual power so as to regulate the temperature of the battery; and the vehicle-mounted air conditioner controller is connected with the compressor and the valve and is used for adjusting the power of the compressor according to the temperature adjustment required power and the temperature adjustment actual power so as to adjust the temperature of the battery.
According to an embodiment of the invention, the battery management controller is further configured to obtain a temperature of the battery, and the temperature adjustment system enters a cooling mode when the temperature of the battery is greater than a first temperature threshold, and enters a heating mode when the temperature of the battery is less than a second temperature threshold.
According to one embodiment of the invention, when the temperature regulation required power is greater than the temperature regulation actual power, the vehicle-mounted air conditioner controller acquires a power difference between the temperature regulation required power and the temperature regulation actual power; when in the cooling mode, the on-vehicle air-conditioning controller increases at least one of the power of the compressor for cooling the battery and the opening degree of the valve in accordance with the power difference, and decreases/maintains at least one of the power of the compressor for the battery and the opening degree of the valve when the temperature regulation required power is less than or equal to the temperature regulation actual power; when the battery thermal management controller is in the heating mode, the battery thermal management controller increases the power of a heater for heating the battery according to the power difference, and reduces/maintains the power of the heater when the temperature adjustment required power is less than or equal to the temperature adjustment actual power.
According to one embodiment of the invention, the battery thermal management controller is further configured to reduce/maintain the rotational speed of the pump when the temperature regulation required power is less than or equal to the temperature regulation actual power; and when the temperature regulation required power is greater than the temperature regulation actual power, the battery thermal management controller is also used for increasing the rotating speed of the pump.
According to one embodiment of the present invention, the number of the cells is plural, and the heat exchange flow paths between the plural cells are communicated with each other.
According to one embodiment of the invention, the number of the pumps is two, wherein the rotation directions of the two pumps are opposite, and the two pumps are connected in parallel; alternatively, the number of the pumps is one, and the pump is a bidirectional pump.
According to one embodiment of the invention, the on-board air conditioning module further comprises an in-board cooling branch in series with the refrigeration branch and in parallel with the battery cooling branch.
According to one embodiment of the invention, the heat exchanger is a plate heat exchanger.
According to one embodiment of the invention, the heat exchange flow path comprises a first flow path and a second flow path in the cell, wherein the flow directions of the media in the first flow path and the second flow path are opposite, and the inlet of the first flow path is connected to the inlet of the second flow path and the outlet of the first flow path is connected to the outlet of the second flow path.
According to an embodiment of the present invention, the battery is plural, further comprising: and third temperature sensors are arranged on the heat exchange flow paths between the adjacent batteries.
According to an embodiment of the present invention, the number of the compressors is plural, and the number of the in-vehicle cooling branches is plural, and each of the in-vehicle cooling branches includes an evaporator corresponding to one to the compressor and a valve connected to the evaporator.
According to one embodiment of the invention, the battery cooling branch is provided with a plurality of battery cooling branches, and each battery cooling branch is provided with a fourth temperature sensor for detecting the temperature of the medium on the battery cooling branch.
According to one embodiment of the invention, each battery cooling branch is further provided with a flow rate sensor for detecting the flow rate of the medium on the battery cooling branch.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which,
fig. 1 is a schematic configuration diagram of a flow path of a temperature regulation system of a vehicle-mounted battery according to a first embodiment of the invention;
fig. 2 is a schematic configuration diagram of a temperature regulation system of a vehicle-mounted battery according to a second embodiment of the invention;
fig. 3 is a schematic configuration diagram of a temperature regulation system of a vehicle-mounted battery according to a third embodiment of the invention;
FIG. 3A is a schematic diagram of the operation of a controller according to one embodiment of the present invention;
fig. 4 is a schematic configuration diagram of a forward pump in the temperature regulation system of the vehicle-mounted battery according to the fourth embodiment of the invention when operating;
fig. 5 is a schematic structural view of a reverse pump in the thermostat system of the vehicle-mounted battery according to the fourth embodiment of the invention when operating;
fig. 6 is a schematic configuration diagram of a temperature adjustment system of a vehicle-mounted battery according to a fifth embodiment of the invention;
fig. 7 is a schematic configuration diagram of a forward pump in the temperature regulation system of the vehicle-mounted battery according to the sixth embodiment of the invention when operating;
fig. 7A is a schematic structural view of a reverse pump in a temperature regulation system of a vehicle-mounted battery according to a sixth embodiment of the invention when operating;
fig. 8 is a schematic structural view of a thermostat system bidirectional pump for an in-vehicle battery according to a seventh embodiment of the invention when rotating in the forward direction;
fig. 8A is a schematic structural view at the time of reverse rotation of a bidirectional pump in a temperature regulation system of a vehicle-mounted battery according to a seventh embodiment of the invention;
FIG. 9 is a schematic structural diagram of a temperature regulation system of a vehicle-mounted battery with only a heating function according to an embodiment of the present invention;
fig. 10 is a schematic configuration diagram of a temperature adjustment system of a vehicle-mounted battery having only a cooling function according to an embodiment of the invention;
fig. 11 is a schematic configuration diagram of a temperature adjustment system of a vehicle-mounted battery having only a cooling function according to another embodiment of the invention;
fig. 12 is a schematic structural view of a forward pump in the temperature regulation system of the vehicle-mounted battery according to the eighth embodiment of the invention when operating;
fig. 13 is a schematic structural view of the operation of the reverse pump in the temperature regulation system of the vehicle-mounted battery according to the eighth embodiment of the invention;
FIG. 14 is a schematic view of the distribution of outlets according to an embodiment of the present invention;
fig. 15 is a schematic structural view of a forward pump in the temperature regulation system of the vehicle-mounted battery according to the ninth embodiment of the invention when operating;
fig. 15A is a schematic structural view of the operation of the reverse pump in the temperature regulation system of the vehicle-mounted battery according to the ninth embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A temperature adjustment system of a vehicle-mounted battery proposed according to an embodiment of the invention is described below with reference to the accompanying drawings.
Fig. 1 is a schematic configuration diagram of a temperature adjustment system of a vehicle-mounted battery according to a first embodiment of the invention. As shown in fig. 1, the temperature regulation system of the vehicle-mounted battery may include: an on-board air conditioning module 100, a battery temperature adjustment module 5, and a controller (not specifically shown in the drawings).
The vehicle-mounted air conditioning module 100 comprises a refrigeration branch 10 and battery cooling branches 4 connected with the refrigeration branch 10 in series, the refrigeration branch 10 comprises at least one compressor 1 and a condenser 2 connected with the compressor 1, and each battery cooling branch comprises a heat exchanger in one-to-one correspondence with the compressor 1 and a valve connected with the heat exchanger. The battery temperature adjusting module 5 is connected to the battery cooling branch 4 to form a heat exchange flow path. The controller is connected with the in-vehicle air conditioning module 100 and the battery temperature adjusting module 5, and is used for adjusting the temperature of the battery 6.
Specifically, as shown in fig. 1, the battery cooling branch 4 has two pipes, a first pipe is communicated with the compressor 1, and a second pipe is communicated with the battery temperature adjustment module 5, wherein the first pipe and the second pipe are independently and adjacently disposed, so that media (flowing media such as refrigerant, water, oil, and air, or media such as phase change materials, or other chemicals) are independent of each other. When the temperature of the battery 6 is too high, the refrigeration function of the vehicle-mounted air conditioner is started, the cooling function of the battery is started, and the flowing directions of media (such as refrigerants) in the first pipeline and the second pipeline are respectively as follows: the system comprises a compressor 1, a condenser 2, a battery cooling branch 4, the compressor 1, the battery cooling branch 4, a battery temperature adjusting module 5, a battery 6, the battery temperature adjusting module 5 and the battery cooling branch 4.
In the above embodiment, the vehicle-mounted air conditioner is used only for cooling and heating the battery 6, and the temperature regulation system may also cool both the vehicle compartment and the battery 6 by the vehicle-mounted air conditioner. When the system cools both the cabin and the battery 6 by an on-board air conditioner, as shown in fig. 2, in one embodiment of the invention, the on-board air conditioning module 100 may further include an in-board cooling branch 3 connected in series with the cooling branch 10 and in parallel with the battery cooling branch 4. As shown in fig. 3, the in-vehicle cooling branch 3 may include: an evaporator 31, a first expansion valve 32, and a first electronic valve 33.
Specifically, the interior of the vehicle air conditioner is divided into two independent cooling loops from the condenser 2, namely an in-vehicle cooling branch 3 and a battery cooling branch 4, the in-vehicle cooling branch 3 provides cooling power for the space in the vehicle compartment through the evaporator 31, and the battery cooling branch 4 provides cooling power for cooling the battery through the heat exchanger 41. When the temperature in the vehicle is too high, the cooling function in the vehicle is started, and the flowing direction of the medium is as follows: compressor 1-condenser 2-in-vehicle cooling branch 3-compressor 1. When the temperature of the battery 6 is too high, the battery cooling function is started, and the flowing directions of the media in the first pipeline and the second pipeline are as follows: the system comprises a compressor 1, a condenser 2, a battery cooling branch 4, the compressor 1, the battery cooling branch 4, a battery temperature adjusting module 5, a battery 6, the battery temperature adjusting module 5 and the battery cooling branch 4. Therefore, the temperature can be adjusted when the temperature of the vehicle-mounted battery is too high or too low, the temperature of the vehicle-mounted battery is maintained in a preset range, the situation that the performance of the vehicle-mounted battery is influenced by the temperature is avoided, and the temperature in the vehicle can meet the requirement under the condition that the temperature of the battery meets the requirement.
Further, according to an embodiment of the present invention, the battery cooling branch may include: a valve and a heat exchanger 41, wherein one end of the valve is connected with the condenser 2, the other end is connected with the heat exchanger 41, the other end of the heat exchanger 41 is connected with the compressor 1, the valve may comprise a second electronic valve 43 and a second expansion valve 42, and the heat exchanger 41 may be a plate heat exchanger.
In particular, the battery cooling branch 4 provides cooling power for the battery 6 mainly through a heat exchanger 41 (e.g., a plate heat exchanger). As shown in fig. 3, the battery cooling branch 4 may further include: a second expansion valve 42 and a second electronic valve 43. The second electronic valve 43 is used for controlling the opening and closing of the battery cooling branch 4, and the second expansion valve 42 is used for controlling the refrigerant flow of the battery cooling branch 4.
As shown in fig. 3, the heat exchanger 41 may include a first pipe connected to the battery temperature adjusting module 5 and a second pipe communicated with the compressor 1, wherein the first pipe and the second pipe are independently disposed adjacent to each other. In the embodiment of the invention, the physical position of the heat exchanger 41 can be located in the loop where the vehicle-mounted air conditioner compressor 1 is located, so that the vehicle-mounted air conditioner can be conveniently factory-debugged, the vehicle-mounted air conditioner can be independently supplied and assembled, and meanwhile, the vehicle-mounted air conditioner only needs to be filled with a medium (refrigerant) once in the installation process. The physical location of the heat exchanger 41 may also be located in the circuit where the battery 6 is located, and the physical location of the heat exchanger 41 may also be provided independently of the circuit where the vehicle air conditioner compressor 1 is located and the circuit where the battery 6 is located.
In addition, if the heat exchanger 41 is installed in the battery temperature adjusting module 5, the refrigerant circuit of the vehicle air conditioner is not completely sealed, so that the second electronic valve 43 needs to be closed first, then the refrigerant is filled, after the vehicle air conditioner is installed on a vehicle, the vehicle air conditioner is in butt joint with the battery temperature adjusting module 5, the second electronic expansion valve 43 is opened, and the vehicle air conditioner can normally work after being vacuumized and filled with the refrigerant again.
It is understood that the heat exchanger 41 may not be disposed in the battery cooling branch 4, and when the heat exchanger 41 is not disposed, a cooling medium flows in the battery cooling branch 4. When the heat exchanger 41 is provided, a refrigerant flows through the first pipe of the battery cooling branch 4, a medium flows through the second pipe, and a refrigerant flows through the in-vehicle cooling branch 3.
According to an embodiment of the present invention, as shown in fig. 3, the temperature adjustment system of the vehicle-mounted battery further includes: a battery state detection module 611 connected to the battery 6, the battery state detection module 611 being configured to detect a current of the battery 6. The battery detection module 611 may be a current sensor.
According to an embodiment of the present invention, as shown in fig. 3, the battery temperature adjusting module 5 may include a pump 51, a first temperature sensor 55, a second temperature sensor 56, and a flow rate sensor 57 disposed on the heat exchanging flow path, the pump 51, the first temperature sensor 55, the second temperature sensor 56, and the flow rate sensor 57 being connected to the controller, wherein the pump 51 is configured to flow the medium in the heat exchanging flow path, the first temperature sensor 55 is configured to detect an inlet temperature of the medium flowing into the battery 6, the second temperature sensor 56 is configured to detect an outlet temperature of the medium flowing out of the battery 6, and the flow rate sensor 57 is configured to detect a flow rate of the medium in the heat exchanging flow path.
Further, according to an embodiment of the present invention, the battery temperature adjustment module 5 further includes: and the heater 53 is connected with the controller and is used for heating the medium in the heat exchange flow path.
Still further, according to an embodiment of the present invention, the battery temperature adjusting module 5 further includes: a medium container 52 provided on the heat exchange flow path, the medium container 52 being used for storing and supplying the medium to the heat exchange flow path.
Specifically, the heater 53, the pump 51, the cooling flow path in the battery 6, and the medium container 52 are connected in series, that is, the positions of the respective portions connected in series are not limited, wherein the flow rate sensor 57 is provided on the above-described series circuit, the first temperature sensor 55 is provided at the inlet of the cooling flow path of the battery 6, and the second temperature sensor 56 is provided at the outlet of the cooling flow path of the battery 6. For example, the heater 53 is connected to the heat exchanger 41, the pump 51 is connected to the heater 53 and a first end of the cooling flow path of the battery 6, a first temperature sensor 55 is provided at an inlet (first end) of the cooling flow path of the battery 6 for detecting an inlet temperature of the medium of the battery 6, the medium container 52 is connected to a second end of the cooling flow path of the battery 6, a second temperature sensor 56 is provided at an outlet (second end) of the cooling flow path of the battery 6 for detecting an outlet temperature of the medium of the battery 6, and a flow rate sensor 57 is provided at an outlet of the cooling flow path of the battery 6 for detecting a flow rate of the medium of the battery 6. The heater 53 may be a PTC (Positive Temperature Coefficient, which generally refers to a semiconductor material or a component with a large Positive Temperature Coefficient) heater.
In one embodiment of the present invention, as shown in fig. 3A, the controller may include: the system comprises a battery management controller, a battery thermal management controller and a vehicle-mounted air conditioner controller, wherein the battery management controller is connected with a battery state detection module 611 and is used for acquiring temperature regulation required power P1 of the battery. The battery thermal management controller is connected with the pump 51, the first temperature sensor 55, the second temperature sensor 56, the flow rate sensor 57 and the heater 53, and is used for acquiring the temperature adjustment actual power P2 of the battery 6 and adjusting the power of the heater 53 according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 so as to adjust the temperature of the battery 6. The vehicle-mounted air conditioner controller is connected with the compressor 1 and valves (a first electronic valve 33, a second electronic valve 43, a first expansion valve 32 and a second expansion valve 42) and is used for adjusting the power of the compressor 1 according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 so as to adjust the temperature of the battery 6.
Specifically, the battery thermal management controller may be connected to the first temperature sensor 55, the second temperature sensor 56, and the flow rate sensor 57, perform CAN communication with the pump 51 and the heater 53, and acquire the temperature adjustment actual power P2, and control the rotation speed of the pump 51 and the power of the heater 53 according to the specific heat capacity of the medium, the density of the medium, and the cross-sectional area of the flow path. The battery management controller collects current flowing through the battery and the temperature of the battery, obtains temperature regulation required power P1 according to the target temperature and the target time t of the battery, the specific heat capacity C of the battery, the mass M of the battery and the internal resistance R of the battery, and controls the vehicle-mounted air conditioner controller to start or stop working. The vehicle-mounted air conditioner controller is connected with the expansion valve and the electronic valve, CAN communicate with the battery management controller, the battery thermal management controller and the compressor 1 in a CAN mode, and controls the power P of the compressor, the expansion valve and the electronic valve to be opened and closed according to the temperature regulation required power P1 acquired by the battery management controller and the temperature regulation actual power P2 acquired by the battery thermal management controller, so that the purpose of controlling the heat exchange amount is achieved.
The battery thermal management controller is located inside the battery temperature adjusting module, the first temperature sensor 55 and the second temperature sensor 56 are located at a water inlet and a water outlet of the battery 6 respectively and used for transmitting the water inlet temperature and the water outlet temperature which are detected in real time to the battery thermal management controller, so that the battery thermal management controller can calculate the temperature difference value between the water inlet and the water outlet, meanwhile, the flow rate sensor 57 detects the flow rate information of media in the circulating pipeline of the battery 6 in real time and transmits the flow rate information to the battery thermal management controller, and the battery thermal management controller can estimate the actual flow information of the current media. The first electronic valve 33 is used for controlling the opening and closing of the in-vehicle cooling branch 3, and the first expansion valve 32 is used for controlling the medium flow in the in-vehicle cooling branch 3. The second electronic valve 43 is used to control the opening and closing of the battery cooling branch 4, and the second expansion valve 42 can be used to control the medium flow in the battery cooling branch 4. It will be appreciated that the medium flows into the interior of the battery 6 from the inlet of the flow path and out of the outlet of the flow path, thereby effecting heat exchange between the battery and the medium.
In addition, the battery thermal management controller CAN control the operation of the heater 53 and adjust the heating power of the heater through the CAN communication, when the heater 53 receives the battery heating function starting information sent by the battery thermal management controller, the heater is started to operate, the battery thermal management controller sends the battery heating power requirement in real time, and the heater 53 adjusts the output power according to the heating power requirement. Meanwhile, the battery thermal management controller CAN also control the working state of the pump through CAN communication so as to control the flow speed of the battery medium and the flow direction of the medium, and when the starting information of the pump 51 sent by the battery thermal management controller is received, the battery thermal management controller starts to work and adjusts the rotating speed and the flow according to the flow information sent by the battery thermal management controller.
In one embodiment of the invention, the pump 51 is primarily used to provide power, the media reservoir 52 is primarily used to store media and to receive media added to the temperature regulation system, and the media in the media reservoir 52 can be automatically replenished as the media in the temperature regulation system decreases. The heater 53 may be CAN-communicated with a controller that provides heating power to a temperature regulation system of the vehicle-mounted battery, and the heater 53 may be disposed at any position between the medium container 52 and the first temperature sensor 55 under the control of the controller. That is, the heater 53 is not in direct contact with the battery 6, and has high safety, reliability, and practicality.
It is understood that when the medium of the air conditioner is connected to the battery temperature adjusting module 5, the heat exchanger 41, the pump 51, and the medium container 52 are not required. The mode that this kind of on-vehicle air conditioner return circuit and battery cooling branch 4 communicate can improve cooling efficiency, has avoided the incomplete problem of heat transfer of heat exchanger 41 department, has stopped the heat transfer loss because of the heat transfer efficiency of heat exchanger brings promptly.
How the battery temperature adjustment module 5 obtains the temperature-adjustment required power P1 and the temperature-adjustment actual power P2 of the battery 6 is described below with reference to specific embodiments.
According to an embodiment of the present invention, the step of obtaining the power required for temperature adjustment of the battery by the battery management controller specifically includes: the method comprises the steps of obtaining a first parameter when the temperature of the battery is started to be adjusted, generating first temperature adjustment required power according to the first parameter, obtaining a second parameter when the temperature of the battery is adjusted, generating second temperature adjustment required power according to the second parameter, and generating temperature adjustment required power P1 according to the first temperature adjustment required power and the second temperature adjustment required power.
Further, according to an embodiment of the present invention, the first parameter is an initial temperature and a target temperature at which the battery is turned on for temperature adjustment and a target time from the initial temperature to the target temperature, and the controller acquires a first temperature difference between the initial temperature and the target temperature and generates the first temperature adjustment required power according to the first temperature difference and the target time.
Still further, according to an embodiment of the present invention, the battery management controller may generate the first temperature regulation required power by the following equation (1):
ΔT1*C*M/t (1)
wherein, Delta T1Is a first temperature difference between an initial temperature and a target temperature, t is a target time, C is a specific heat capacity of the battery, and M is a mass of the battery.
The second parameter is the average current I of the battery in the preset time, and the battery management controller generates a second temperature regulation required power through the following formula (2):
I2*R (2)
wherein I is the average current and R is the internal resistance of the battery.
According to one embodiment of the invention, the battery thermal management controller generates a second temperature difference based on the inlet temperature and the outlet temperature, and generates a temperature regulated actual power P2 based on the second temperature difference and the flow rate.
Further, according to an embodiment of the present invention, the battery thermal management controller may obtain the temperature adjustment actual power through the following equation (3):
ΔT2*c*m (3)
wherein, Delta T2And c is the specific heat capacity of the medium in the flow path, and m is the mass of the medium flowing through the cross section of the flow path in unit time, wherein m is v ρ s, v is the flow velocity of the medium, ρ is the density of the medium, and s is the cross section of the flow path.
The flow velocity sensor may be replaced by a flow sensor, where m is Q ρ, and Q is a medium flow rate per unit time measured by the flow sensor and flowing through the cross-sectional area of the flow path.
Specifically, after the vehicle is powered on, the battery management controller determines whether the vehicle needs to be temperature-regulated, and if it is determined that the vehicle needs to be temperature-regulated, for example, the temperature of the battery 6 is too high, the vehicle-mounted air-conditioning controller sends information for turning on the temperature regulation function to the vehicle-mounted air-conditioning controller through CAN communication, and after the vehicle-mounted air-conditioning controller turns on the temperature regulation function, the vehicle-mounted air-conditioning controller sends heat exchange information to the battery thermal management controller, and at the same time, the vehicle-mounted controller controls the second electronic valve 43 to be turned on, and the battery thermal management controller controls the pump 51 to.
Meanwhile, the battery management controller obtains an initial temperature (i.e., a current temperature) of the battery 6, a target temperature, and a target time t from the initial temperature to the target temperature, where the target temperature and the target time t may be preset according to an actual situation, and calculates a first temperature regulation required power of the battery according to the above equation (1). The battery management controller also obtains the average current I of the battery 6 in a preset time, and calculates a second temperature regulation required power of the battery according to the formula (2). Then, the battery management controller calculates a temperature regulation required power P1 (required power that regulates the temperature of the battery 6 to a target temperature for a target time) from the first temperature regulation required power and the second temperature regulation required power of the battery 6, where P1 ═ Δ T when cooling the battery 61*C*M/t+I2R, when the battery 6 is heated, P1 ═ Δ T1*C*M/t-I2*R。
The battery thermal management controller acquires temperature information detected by the first temperature sensor 55 and the second temperature sensor 56, acquires flow rate information detected by the flow rate sensor 57, and calculates the temperature-adjusted actual power P2 of the battery 6 according to the above equation (3).
Finally, the vehicle air conditioner controller controls the output power of the compressor and the opening degree of the second expansion valve 42 according to the temperature regulation required power P1 and the temperature regulation actual power P2 of the battery 6, and optionally, the battery thermal management controller regulates the rotation speed of the pump 51. If the temperature regulation demand power P1 is greater than the temperature regulation actual power P2, the power of the compressor is increased and the opening degree of the second expansion valve 42 is increased according to the difference between the temperature regulation demand power P1 and the temperature regulation actual power P2, and the rotation speed of the pump 51 is optionally increased; if the temperature-adjustment required power P1 is less than the temperature-adjustment actual power P2, the power of the compressor is reduced and the opening degree of the second expansion valve 42 is reduced according to the difference between the temperature-adjustment required power P1 and the temperature-adjustment actual power P2, and the rotation speed of the pump 51 is optionally reduced.
As an example, it can be seen from the above embodiment that the temperature regulation demand power P1 is composed of two parts, and when the battery 6 needs to be cooled,assuming that the initial temperature of the battery 6 is 45 ℃ and the target temperature is 35 ℃, the amount of heat that the battery needs to dissipate to decrease from 45 ℃ to 35 ℃ is fixed, as represented by the above equation (1), i.e., Δ T1The direct calculation of C M/t may be obtained, i.e. the first thermostat demand power. Meanwhile, during the cooling process of the battery 6, there are discharging and charging processes, which generate heat, and since the discharging or charging current of the battery 6 is changed, the heat of the part can also be directly obtained by detecting the average current I of the battery, which is expressed by the above formula (2), i.e. I2R, directly calculating the heating power of the current battery 6, i.e., the second temperature adjustment required power. The cooling completion time of the present invention is set based on the target time t (t may be changed according to the user's needs or the actual design condition of the vehicle). After the target time T required for cooling completion is determined, the temperature adjustment required power P1, P1 ═ Δ T, required for cooling of the current battery 6 can be estimated1*C*M/t+I2R. If the heating function is started, the temperature regulation required power P1 is delta T1*C*M/t-I2R, i.e., the greater the discharge or charge current of the battery 6 during the heating of the battery 6, the smaller the required heating power, i.e., the temperature regulation demand power P1.
How the in-vehicle air-conditioning controller adjusts the temperature of the batteries 6 according to the temperature-adjustment required power P1 and the temperature-adjustment actual power P2 according to each battery 6 will be described below with reference to a specific embodiment. According to an embodiment of the present invention, the battery management controller is further configured to obtain a temperature of the battery 6, enter a cooling mode when the temperature of the battery 6 is greater than a first temperature threshold, and enter a heating mode when the temperature of the battery is less than a second temperature threshold. The first temperature threshold and the second temperature threshold may be preset according to actual conditions, where the first temperature threshold is generally greater than the second temperature threshold, for example, the first temperature threshold may be 40 ℃ and the second temperature threshold may be 0 ℃.
Specifically, after the vehicle is powered on, the battery management controller detects the temperature of the battery 6 in real time and makes a judgment thereof. If the temperature of the battery 6 is higher than 40 ℃, which indicates that the temperature of the battery 6 is too high at this time, in order to avoid the influence of the high temperature on the performance of the battery 6, the temperature of the battery 6 needs to be reduced, the temperature regulation system is controlled to enter a cooling mode, and the start information of the battery cooling function is sent to the vehicle-mounted air conditioner controller. The in-vehicle air conditioning controller controls the second electronic valve 43 to open after receiving the battery cooling function start information, so that the medium exchanges heat with the battery 6 to lower the temperature of the battery 6. As shown in fig. 3, when the temperature regulation system operates in the cooling mode, the flow directions of the media in the corresponding first and second conduits in the circuit in which the battery 6 is located are: compressor 1-condenser 2-second electronic valve 43-second expansion valve 42-heat exchanger 41-compressor 1; the heat exchanger 41, the heater 53 (closed), the pump 51, the first temperature sensor 55, the battery 6, the second temperature sensor 56, the flow rate sensor 57, the medium container 52 and the heat exchanger 41 are circulated, heat exchange is carried out at the heat exchanger 41, and the temperature reduction of the battery 6 is realized.
And if the temperature of the battery 6 is lower than 0 ℃, which indicates that the temperature of the battery 6 is too low at this time, in order to avoid the influence of low temperature on the performance of the battery 6, the temperature of the battery 6 needs to be raised, and the battery management controller controls the temperature regulating system to enter a heating mode and sends the start information of the battery heating function to the vehicle-mounted air conditioner controller. The vehicle-mounted air conditioner controller controls the second electronic valve 43 to be closed after receiving the starting information of the battery heating function, and meanwhile, the battery thermal management controller controls the heater 53 to be opened so as to provide heating power for the temperature adjusting system. When the temperature regulation system operates in the heating mode, the flow directions of the media in the first battery 61 and the second battery 62 are: the heat exchanger 41, the heater 53 (on), the pump 51, the first temperature sensor 55, the battery 6, the second temperature sensor 56, the flow rate sensor 57, the medium container 52 and the heat exchanger 41 are circulated, and the temperature rise of the battery 6 is realized.
Further, according to an embodiment of the present invention, the in-vehicle air conditioner controller acquires a power difference between the temperature regulation required power and the temperature regulation actual power when the temperature regulation required power is greater than the temperature regulation actual power. When in the cooling mode, the on-board air conditioning controller increases at least one of the power of the compressor and the opening degree of the valve for cooling the battery according to the power difference, and decreases/maintains at least one of the power of the compressor and the opening degree of the valve of the battery when the temperature adjustment required power is less than or equal to the temperature adjustment actual power, and when in the heating mode, the battery thermal management controller increases the power of the heater for heating the battery according to the power difference, and decreases/maintains the power of the heater when the temperature adjustment required power is less than or equal to the temperature adjustment actual power.
Specifically, when the temperature regulation system works in the cooling mode, the battery management controller obtains the temperature regulation required power P1 of the battery, the battery management controller obtains the temperature regulation actual power P2 of the battery, and the vehicle-mounted air conditioner controller judges according to the temperature regulation required power P1 and the temperature regulation actual power P2. If the temperature adjustment required power P1 of the battery 6 is greater than the temperature adjustment actual power P2, it means that if the temperature reduction of the battery 6 cannot be completed within the target time according to the current cooling power or medium flow rate, the in-vehicle air conditioning controller acquires the power difference between the temperature adjustment required power P1 of the battery and the temperature adjustment actual power P2, and increases the power of the compressor 1 according to the power difference, or increases the medium flow rate of the battery, that is, increases the opening degree of the second expansion valve 42, to increase the cooling power of the battery, wherein the larger the power difference between the temperature adjustment actual power P1 and the temperature adjustment actual power P2 is, the more the power of the compressor 1 and the medium flow rate of the battery are increased, so that the temperature of the battery is reduced to the target temperature within the preset time t. Whereas, if the temperature-adjusting actual power P1 of the battery 6 is less than or equal to the temperature-adjusting actual power P2, the on-board air-conditioning controller may keep the power of the compressor 1 unchanged or appropriately reduce the power of the compressor 1, or reduce the medium flow rate of the battery, i.e., reduce the opening degree of the second expansion valve 42, to reduce the cooling power of the battery. When the temperature of the battery 6 is lower than 35 ℃, the cooling of the battery 6 is completed, the battery management controller sends information for turning off the temperature regulation function to the vehicle-mounted air conditioner controller through the CAN communication, and the vehicle-mounted air conditioner controller controls the second electronic valve 43 to be turned off. If the temperature of the battery 6 is still higher than 35 c after the thermostat system has entered the cooling mode for a longer time, for example, after 1 hour, the on-board air conditioning controller increases the power of the compressor 1 appropriately to allow the battery to finish cooling as soon as possible.
When the temperature regulating system works in a heating mode, the battery thermal management controller obtains P1 of the battery, and the battery thermal management controller obtains the temperature regulating actual power P2 of the battery. If the temperature regulation required power P1 of the battery 6 is greater than the temperature regulation actual power P2, indicating that the temperature rise of the battery 6 cannot be completed within the target time according to the current heating power or medium flow rate, the battery thermal management controller obtains the power difference between the temperature regulation required power P1 of the battery and the temperature regulation actual power P2, and increases the power of the heater 53 for heating the battery 6 according to the power difference, or adjusts the increase of the medium flow rate of the battery, for example, the rotation speed of the pump 51 may be increased, so that the battery can complete the temperature regulation within the target time. Wherein the larger the difference between the temperature regulation required power P1 and the temperature regulation actual power P2 is, the more the power of the heater 53 and the medium flow rate of the battery circuit are increased. And if the temperature regulation required power P1 of the battery is less than or equal to the temperature regulation actual power P2, the battery thermal management controller may appropriately reduce the power of the heater 53, or keep the power of the heater 53 unchanged, or reduce the medium flow rate of the battery circuit to reduce the heating power of the battery. When the temperature of the battery 6 is higher than a preset temperature, for example, 10 ℃, the heating of the battery 6 is completed, the battery management controller sends a message for turning off the temperature adjustment function to the battery thermal management controller through CAN communication, and the battery thermal management controller controls the heater 53 to be turned off. If the temperature of the battery 6 is still below 10 c after the thermostat system enters the heating mode for a longer period of time, such as 1 hour, the battery thermal management controller will increase the power to the heater 53 appropriately to allow the battery 6 to finish warming as soon as possible.
According to an embodiment of the present invention, the battery thermal management controller is further configured to decrease/maintain the rotation speed of the pump 51 when the temperature regulation required power is less than or equal to the temperature regulation actual power, and to increase the rotation speed of the pump 51 when the temperature regulation required power is greater than the temperature regulation actual power.
Specifically, when the temperature regulation system enters the heating mode or the cooling mode, if the temperature regulation required power P1 of the battery 6 is smaller than the temperature regulation actual power P2, the battery thermal management controller controls the rotation speed of the pump 51 to be reduced to save electric power, or keeps the rotation speed of the pump 51 constant. And if the temperature regulation required power P1 of the battery 6 is greater than the temperature regulation actual power P2, the battery thermal management controller is also configured to control the rotational speed of the pump 51 to be increased, and the mass of the medium flowing through the cross-sectional area of the cooling flow path per unit time can be increased, thereby increasing the temperature regulation actual power P2 of the battery to achieve temperature regulation within the target time t. On the other hand, if the temperature-adjustment required power P1 of the battery 6 is equal to the temperature-adjustment actual power P2, it is sufficient to control the rotation speed of the pump 51 to be kept constant at the current rotation speed.
According to an embodiment of the present invention, as shown in fig. 4, the battery 6 may be provided in plurality, and the plurality of batteries 6 are connected in series with each other, and the heat exchange flow paths between the plurality of batteries are communicated with each other. The number of the batteries may be calibrated according to actual conditions, for example, the number of the batteries 6 may be 2, and the number of the batteries is respectively the first battery 61 and the second battery 62, and each battery is correspondingly provided with a battery state detection module (such as a current sensor) for detecting a charge and discharge current parameter of the corresponding battery, so that the battery management controller counts the average current of the batteries over a period of time to estimate the heating power of the battery 6.
Further, according to an embodiment of the present invention, as shown in fig. 4, the number of the pumps 51 may be two, i.e., a forward pump 511 and a reverse pump 512, wherein the rotation directions of the two pumps are opposite and the two pumps are connected in parallel.
Specifically, when the battery temperature is higher than the set value, the battery cooling function is started, at which time the second electronic valve 43 is opened, and if the forward pump 511 is started at this time, the medium circulation direction in the battery cooling pipe is as shown in fig. 4, the heat exchanger 41-the heater 53 (off) -the forward pump 511-the first temperature sensor 55-the first battery 61-the second battery 62-the second temperature sensor 56-the flow rate sensor 57-the medium container 52-the heat exchanger 41. If the reversing pump 512 is started at this time, the medium circulating direction in the battery cooling pipe is as shown in fig. 5, the heat exchanger 41, the medium container 52, the flow rate sensor 57, the second temperature sensor 56, the second battery 62, the first battery 61, the first temperature sensor 55, the reversing pump 512, the heater 53 (off), and the heat exchanger 41.
When the battery temperature is lower than the set value, the battery heating function is activated, the second electronic valve 43 is closed, and the heater 53 is activated. If the forward pump 511 is started at this time, the medium flow direction in the battery cooling pipe is as shown in fig. 4, the heat exchanger 41-the heater 53 (started) -the forward pump 511-the first temperature sensor 55-the first battery 61-the second battery 62-the second temperature sensor 56-the flow rate sensor 57-the medium container 52-the heat exchanger 41. If the reversing pump 512 is started at this time, the medium flow direction in the battery cooling pipe is as shown in fig. 5, the heat exchanger 41-the medium container 52-the flow rate sensor 57-the second temperature sensor 56-the second battery 62-the first battery 61-the first temperature sensor 55-the reversing pump 512-the heater 53 (started) -the heat exchanger 41.
As a specific example, the battery management controller detects temperature information of the battery in real time. When the battery temperature is higher than a set value, battery cooling function starting information is sent to a vehicle-mounted air conditioner controller through CAN communication, and when the battery temperature reaches the set value of cooling ending, battery cooling function ending information is sent. When the temperature of the battery is lower than a set value, battery heating function starting information is sent to a vehicle-mounted air conditioner controller through CAN communication, and when the temperature of the battery reaches the set value of heating end, battery heating function ending information is sent. The battery management controller can estimate the current heat productivity of the battery through the current discharging/charging current of the battery acquired by the current sensor, estimate the actual cooling/heating efficiency of the battery thermal management system through the difference value between the current average temperature of the battery and the target temperature value of the battery, and send the required heating/cooling power information of the battery to the vehicle-mounted air conditioner controller. The battery management controller can transmit battery temperature difference information to the battery management controller by comparing the battery temperature difference between the first battery 61 and the second battery 62, and the battery temperature difference between the batteries can be reduced by controlling the working states of the forward pump 511 and the reverse pump 512 to change the medium flow direction. For example, when the battery cooling function is started, if the battery temperature of the first battery 61 is higher than that of the second battery 62 and the difference exceeds a set value, the battery thermal management controller controls the forward pump 511 to operate, and the medium flows through the first battery 61 and then flows through the second battery 62; if the battery temperature of the second battery 62 is higher than the battery temperature of the first battery 61 and the difference exceeds the set value, the battery thermal management controller controls the reverse pump 512 to work, and the medium flows through the second battery 62 and then flows through the first battery 61.
When the vehicle does not start the battery heating or battery cooling function, if the battery management controller detects that the battery temperature difference between the batteries exceeds a set value, the vehicle-mounted air conditioner controller sends the starting information of the internal circulation function of the batteries, after receiving the information, the vehicle-mounted air conditioner controller forwards the information to the battery thermal management controller, the battery thermal management controller controls the forward pump 511 to work, the forward pump 511 is started to drive a medium in the cooling loop, and the temperature of the batteries is balanced through the medium.
In order to balance the temperatures of the first battery 61 and the second battery 62, during the cooling process of the batteries, if the battery temperature difference between the temperature T61 of the first battery 61 and the temperature T62 of the second battery 62 exceeds a preset temperature (e.g., 3 ℃), i.e., T61-T62 > 3 ℃, the battery thermal management controller controls the forward pump to be started, so that the medium flows through the first battery 61 and then flows through the second battery 62, and the temperature balance of the first battery 61 and the second battery 62 is realized. And if the temperature T62-T61 is more than 3 ℃, the battery thermal management controller controls the opening degree of the regulating valve 58 in the cooling branch of the second battery 62 to be increased, and controls the reverse pump to be opened, so that the medium flows through the second battery 62 firstly and then flows through the first battery 61, and the temperature balance of the first battery 61 and the second battery 62 is realized.
In addition, in order to reduce the temperature difference between the plurality of cells, as shown in fig. 8, the pump 51 may be a bidirectional pump according to an embodiment of the present invention.
Compared with the temperature adjustment system of the vehicle-mounted battery in the above-described embodiment (fig. 4), the flow direction of the medium can be controlled by controlling the rotation direction of the pump, and the temperature difference between the first battery and the second battery is reduced, so that temperature equalization is achieved among the plurality of batteries.
The principle of the temperature adjustment system for the vehicle-mounted battery shown in fig. 8 and 8A is similar to that of the embodiment shown in fig. 4, and the functions implemented by the functional modules are the same, and the difference is that only in order to further implement temperature equalization between the batteries, the forward pump and the reverse pump are replaced by one bidirectional pump, and in order to avoid redundancy, detailed description is omitted here.
Therefore, in the temperature regulation system for the vehicle-mounted battery in the embodiment of the invention, when the battery management controller detects that the temperature difference value between the water outlet temperature and the water inlet temperature of the battery exceeds the set value, the start information of the internal circulation function of the battery is sent, the vehicle-mounted air conditioner controller receives the information and forwards the information to the battery thermal management controller, the battery thermal management controller controls the pump to start working, the pump is started to drive the medium in the cooling loop, and the battery temperature is balanced through the medium.
In order to reduce the temperature difference between the plurality of cells, according to an embodiment of the present invention, as shown in fig. 6, when the number of the pumps 51 is 1, the plurality of cells 6 are still in plurality, and the plurality of cells are connected in series with each other, but there is more than one series circuit among the plurality of cells, the heat exchange flow path may include a first flow path and a second flow path in the cells, wherein the flow directions of the media in the first flow path and the second flow path are opposite, and the inlet of the first flow path is connected to the inlet of the second flow path, and the outlet of the first flow path is connected to the outlet of the second flow path. Still taking 2 batteries as an example, two series circuits are arranged between the first battery 61 and the second battery 62, the medium flow directions of the two series circuits are different, the flow direction 1 means that the medium flows through the first battery 61 first and then flows to the second battery 62, and the flow direction 2 means that the medium flows through the second battery 62 first and then flows to the first battery 61.
Compared with the temperature regulating system of the vehicle-mounted battery in the embodiment (fig. 4), one pump is reduced, the cost is saved, the control scheme is simpler, the pump is determined to be started without judging the temperature difference of the batteries, the bidirectional medium passes through the battery box, the temperature difference among the batteries connected in series is further reduced, and the consistency of the batteries is improved.
It should be noted that the principle of the temperature adjustment system of the vehicle-mounted battery shown in fig. 6 is similar to that of the embodiment shown in fig. 4, and the functions implemented by the functional modules are the same, and the difference is that there are only a plurality of loops between the batteries, and only one pump is needed, which is not described herein again.
In order to further improve the control accuracy, according to an embodiment of the present invention, as shown in fig. 7, the battery 6 includes a plurality of batteries, and further includes: third temperature sensors 63 are provided in the heat exchange flow paths between the adjacent cells. After the third temperature sensor 63 is added, the battery temperature adjusting module 5 can respectively obtain the real-time heating/cooling power of the first battery 61 and the second battery 62, so as to control the starting operation of the pump according to the real-time heating/cooling power of the first battery 61 and the second battery 62, and balance the heating/cooling power between the two batteries, so that the temperature balance between the batteries is realized.
As compared with the temperature adjustment system of the in-vehicle battery in the above-described embodiment (fig. 4), the embodiment corresponding to fig. 4 can obtain only the sum of the real-time heating/cooling powers of the first battery 61 and the second battery 62. The embodiment corresponding to fig. 7 can obtain the real-time heating/cooling power of the first battery 61 and the second battery 62, respectively, and improve the control accuracy.
It should be noted that the principle of the temperature control system for the vehicle-mounted battery shown in fig. 7 is similar to that of the embodiment shown in fig. 4, and the functions of the functional modules are the same, except that a temperature sensor is additionally provided between the batteries, and when the pump is controlled according to the real-time heating/cooling powers of the first battery and the second battery, the control is performed according to the real-time heating/cooling powers of the plurality of batteries.
Specifically, when the battery temperature is higher than the set value, the battery cooling function is started, at which time the second electronic valve 43 is opened, and if the forward pump 511 is started at this time, the medium circulation direction in the battery cooling pipe is as shown in fig. 7, the heat exchanger 41-the heater 53 (off) -the forward pump 511-the first temperature sensor 55-the first battery 61-the third temperature sensor 63-the second battery 62-the second temperature sensor 56-the flow rate sensor 57-the medium container 52-the heat exchanger 41. If the reversing pump 512 is started at this time, the medium circulating direction in the battery cooling pipe is as shown in fig. 7A, the heat exchanger 41, the medium container 52, the flow rate sensor 57, the second temperature sensor 56, the second battery 62, the third temperature sensor 63, the first battery 61, the first temperature sensor 55, the reversing pump 512, the heater 53 (off), and the heat exchanger 41.
When the battery temperature is lower than the set value, the battery heating function is activated, the second electronic valve 43 is closed, and the heater 53 is activated. If the forward pump 511 is started at this time, the medium in the battery cooling pipe circulates in the direction shown in fig. 7, the heat exchanger 41-the heater 53 (started) -the forward pump 511-the first temperature sensor 55-the first battery 61-the third temperature sensor 63-the second battery 62-the second temperature sensor 56-the flow rate sensor 57-the medium container 52-the heat exchanger 41. If the reversing pump 512 is started at this time, the medium circulating direction in the battery cooling pipe is as shown in fig. 7A, the heat exchanger 41, the medium container 52, the flow rate sensor 57, the second temperature sensor 56, the second battery 62, the third temperature sensor 63, the first battery 61, the first temperature sensor 55, the reversing pump 512, the heater 53 (start) -the heat exchanger 41.
Considering the problem of the ambient temperature of the automobile, some temperature regulation systems of the vehicle-mounted battery only need a heating function, and some temperature regulation systems of the vehicle-mounted battery only need a cooling function.
When the temperature regulation system of the vehicle-mounted battery has only a heating function, as shown in fig. 9, the temperature regulation system of the vehicle-mounted battery may include: a battery temperature adjusting module 5, wherein the battery temperature adjusting module 5 may include: a heater 53, a pump 51, a first temperature sensor 55, a second temperature sensor 56, a flow rate sensor 57, and a medium container 52. When the temperature of the battery exceeds the set value, the heater 53 and the pump 51 start to operate until the temperature of the battery reaches the set value, and the operation is stopped.
Likewise, when the temperature regulation system of the vehicle-mounted battery has only a cooling function, as shown in fig. 10, the temperature regulation system of the vehicle-mounted battery may include: the system comprises a compressor 1, a condenser 2, an in-vehicle cooling branch 3, a battery cooling branch 4 and a battery temperature adjusting module 5.
The condenser 2 is connected with the compressor 1, the in-vehicle cooling branch 3 is connected with the compressor 1, and the battery cooling branch 4 is connected with the compressor 1. A battery temperature regulating module 5 is connected between the battery 6 and the battery cooling branch 4 for regulating the temperature of the battery 6. The compressor 1 and the condenser 2 form a refrigeration branch.
According to an embodiment of the present invention, as shown in fig. 10, the battery cooling branch 4 has a heat exchanger, the battery 6 has a flow path therein, and the battery temperature adjusting module 5 may include: a pump 51, a first temperature sensor 55, a medium container 52 and a second temperature sensor 56. Wherein a pump 51 is connected to the heat exchanger 41 and to a first end of the flow path of the battery, a first temperature sensor 55 is connected to the pump 51 for detecting the inlet temperature of the medium of the battery, a medium container 52 is connected to a second end of the flow path of the battery, and a second temperature sensor 56 is connected to the medium container 52 for detecting the outlet temperature of the medium of the battery 6.
As compared with the temperature control system for the in-vehicle battery of the above-described embodiment (fig. 4), the present invention is different in that the heater 53 is not provided, so that the battery heating function is not realized, and only the battery cooling function is realized.
It can be understood that, as shown in fig. 11, when only the cooling function of the battery needs to be realized, the temperature adjustment system for the vehicle-mounted battery may also be configured without the battery temperature adjustment module 5, and only include a vehicle-mounted air conditioner (battery cooling branch 4) and the battery, where the vehicle-mounted air conditioner includes the compressor 1, the condenser 2, the second electronic valve 43, and the second expansion valve 42, and the medium inside the battery cooling pipeline is a refrigerant.
Compared with the temperature regulation system of the vehicle-mounted battery of the embodiment (fig. 4), the temperature regulation system has a simpler structure, and the amount of the refrigerant flowing through the battery is directly controlled by the vehicle-mounted air conditioner.
Therefore, the temperature adjusting system of the vehicle-mounted battery can provide refrigeration power for the interior of the battery car, the refrigeration power of the system is provided by the vehicle-mounted air conditioner, the refrigeration power and the refrigeration system in the car share refrigeration capacity, the size of the battery thermal management system is reduced, the refrigeration capacity is distributed more flexibly, the requirement for cooling power in a carriage can be met, and the cooling requirement of the power battery can be met. Meanwhile, the battery heat management function is controlled in a centralized mode by a battery heat management controller, the battery heat management controller determines the heating or cooling power required by the system through the water temperature, the flow rate, the power battery parameters and the operating condition of the vehicle-mounted air conditioner, and the refrigerating capacities of the control system and the vehicle-mounted air conditioner are reasonably distributed by controlling the flow distribution of the air conditioner refrigerants, so that the requirements of vehicle internal cooling and battery cooling are met simultaneously.
Fig. 12 is a schematic structural view of a temperature adjustment system of a vehicle-mounted battery according to an eighth embodiment of the invention. As shown in fig. 12, the temperature adjustment system of the vehicle-mounted battery may include: a plurality of refrigeration branches, a plurality of in-vehicle cooling branches 3, a plurality of battery cooling branches 4, and a battery temperature adjusting module 5.
Wherein, the compressor 1 can be a plurality of and not related to each other, each refrigeration branch can include the compressor 1 and the condenser 2 that is connected with the compressor 1, and a plurality of valves in a plurality of battery cooling branches 4 are connected with a plurality of compressors 1, and a plurality of valves in a plurality of in-vehicle cooling branches 3 are connected with a plurality of compressors 1. Each in-vehicle cooling branch may include a first expansion valve 32 and a first electronic valve 33. Each battery cooling branch may include a second expansion valve 42 and a second electronic valve 43. It will be understood that each refrigeration circuit of the on-board air conditioner, starting from the condenser 2, branches into two separate cooling branches, an in-vehicle cooling branch 3 and a battery cooling branch 4. The internal cold branch 3 provides cooling power for the carriage mainly through the evaporator 31, and the battery cooling branch 4 provides cooling power for the battery mainly through the heat exchanger 41.
Further, as shown in fig. 12, a plurality of temperature sensors, for example, a third temperature sensor, are respectively disposed on the plurality of battery cooling branches 4, and are used for detecting the temperature of the medium on each battery cooling branch, so that the on-board air conditioning controller can estimate the cooling power on each battery cooling branch.
Furthermore, as shown in fig. 12, a plurality of flow rate sensors are respectively disposed on the plurality of battery cooling branches 4, and are used for detecting the flow rate of the medium on each battery cooling branch, so that the vehicle air conditioner controller can estimate the cooling power on each battery cooling branch.
In an embodiment of the present invention, the battery temperature adjusting module 5 may include a heater 53, a forward pump 511, a reverse pump 512, a first temperature sensor 55, a second temperature sensor 56, a flow rate sensor 57, and a medium container 52.
Specifically, two cooling branches, a battery cooling branch, an in-vehicle cooling branch, and a battery are taken as examples. The batteries 6 are respectively a first battery 61 and a second battery 62, and are connected in series with each other, the refrigeration branches are respectively a first refrigeration branch 111 and a second refrigeration branch 112, the battery cooling branches are respectively a first battery cooling branch 401 and a second battery cooling branch 402, and the in-vehicle cooling branch loops are respectively a first in-vehicle cooling branch 301 and a second in-vehicle cooling branch 302.
When the battery cooling function starts, the refrigerant of each refrigeration loop has 2 flowing directions, taking the refrigeration loop 1 as an example, the refrigerant flowing direction of the in-vehicle cooling branch is as follows: compressor 11-condenser 21-first electronic valve 331-first expansion valve 321-evaporator 311-compressor 11; the flow direction of the refrigerant of the battery cooling loop is as follows: the compressor 11, the condenser 21, the second electronic valve 431, the second expansion valve 421, the flow rate sensor 441, the third temperature sensor 451, the heat exchanger 411, the fourth temperature sensor 1A, and the compressor 11. Taking the refrigeration loop 2 as an example, the flow direction of the refrigerant in the in-vehicle cooling branch is as follows: compressor 12-condenser 22-first electronic valve 332-first expansion valve 322-evaporator 312-compressor 12; the flow direction of the refrigerant of the battery cooling loop is as follows: compressor 12-condenser 22-second electronic valve 432-second expansion valve 422-flow rate sensor 442-third temperature sensor 452-heat exchanger 412-fourth temperature sensor 1B-compressor 12.
When the battery temperature is higher than the set value, the battery cooling function is activated, the second electronic valve 431 and the second electronic valve 432 are activated, and the air conditioner in the car does not require cooling, and the first electronic valve 331 and the first electronic valve 332 are closed. If the forward pump 511 is started at this time, there are 2 medium circulation directions in the battery cooling pipe, as shown in fig. 12: heat exchanger 411-heater 53 (off) -forward pump 511-first temperature sensor 55-first battery 61-second battery 62-second temperature sensor 56-flow rate sensor 57-medium container 52-heat exchanger 411. Heat exchanger 412-heater 53 (off) -forward pump 511-first temperature sensor 55-first battery 61-second battery 62-second temperature sensor 56-flow rate sensor 57-medium container 52-heat exchanger 412. If the reverse pump 512 is started at this time, there are 2 medium circulation directions in the battery cooling pipe, as shown in fig. 13: heat exchanger 411-medium container 52-flow rate sensor 57-second temperature sensor 56-second battery 62-first battery 61-first temperature sensor 55-reversing pump 512-heater 53 (off) -heat exchanger 411. Heat exchanger 412-medium container 52-flow rate sensor 57-second temperature sensor 56-second battery 62-first battery 61-first temperature sensor 55-reversing pump 512-heater 53 (off) -heat exchanger 412.
When the battery temperature is lower than the set value, the battery heating function is activated, the second electronic valve 431 and the second electronic valve 432 are closed, and the heater 53 is activated. If the forward pump 511 is started at this time, there are 2 medium circulation directions in the battery cooling pipe, as shown in fig. 12: heat exchanger 411-heater 53 (start) -forward pump 511-first temperature sensor 55-first battery 61-second battery 62-second temperature sensor 56-flow rate sensor 57-medium container 52-heat exchanger 411. Heat exchanger 412-heater 53 (start) -forward pump 511-water temperature sensor 1-first battery 61-second battery 62-second temperature sensor 56-flow rate sensor 57-medium container 52-heat exchanger 412. If the reverse pump 512 is started at this time, there are 2 medium circulation directions in the battery cooling pipe, as shown in fig. 13: heat exchanger 411-medium container 52-flow rate sensor 57-second temperature sensor 56-second battery 62-first battery 61-first temperature sensor 55-reversing pump 512-heater 53 (start) -heat exchanger 411. Heat exchanger 412-medium container 52-flow rate sensor 57-second temperature sensor 56-second battery 62-first battery 61-first temperature sensor 55-reversing pump 512-heater 53 (start) -heat exchanger 412.
According to the temperature regulating system of the vehicle-mounted battery, disclosed by the embodiment of the invention, the battery cooling loops are in series connection, the control is simple, and the realization is easy.
In one embodiment of the present invention, the battery temperature adjusting module 5 may further include a controller, wherein the controller may include a battery management controller, a battery thermal management controller, and an on-board air conditioning controller.
The on-vehicle air conditioner controller estimates the cooling power of battery cooling branch circuit 1 by third temperature sensor 451, fourth temperature sensor 1A, and second flow rate sensor 441, and estimates the cooling power of battery cooling branch circuit 2 by third temperature sensor 452, fourth temperature sensor 1B, and second flow rate sensor 442. The in-vehicle air conditioning controller may control the refrigerant flow rate of the battery cooling branch circuit 1 through the second electronic valve 431 and the second expansion valve 121, and control the refrigerant flow rate of the battery cooling branch circuit 2 through the second electronic valve 4 and the second expansion valve 4, thereby controlling the cooling power of the battery cooling branch circuit 1 and the battery cooling branch circuit 2.
The vehicle-mounted air conditioner controller also detects the air temperature of each area in the carriage, and can adjust the power distribution of each refrigeration loop to the battery cooling branch loop according to the air temperature difference of each area and the heat management power demand of the system, so as to balance the air temperature of each area.
For example, as shown in fig. 14, it is assumed that the air outlet 1 and the air outlet 2 are both provided with cooling power by the refrigeration circuit 1, and the air outlet 3 and the air outlet 4 are both provided with cooling power by the refrigeration circuit 2. When the battery cooling function is started, if the vehicle-mounted air conditioner controller detects that the air temperatures near the air outlet 1 and the air outlet 2 are higher than the air temperatures in the areas where the air outlet 3 and the air outlet 4 are located and the difference is large, the vehicle-mounted air conditioner controller can control the opening degree of the first expansion valve 321 of the expansion valve to be increased and the opening degree of the second expansion valve 421 to be decreased, so that the cooling power of the in-vehicle cooling branch circuit 1 in the refrigeration circuit 1 is increased, and the cooling power of the battery cooling branch circuit 1 is decreased. Meanwhile, in order to ensure that the cooling capacity of the battery is not changed, the on-board air conditioning controller may control the opening degree of the first expansion valve 322 to decrease and the opening degree of the second expansion valve 422 to increase, so that the cooling capacity of the in-vehicle cooling branch circuit 2 in the refrigeration circuit 2 decreases and the cooling capacity of the battery cooling branch circuit 2 increases. Therefore, the air temperature in each area in the carriage can be balanced, and the refrigerating power requirement of the battery can be met.
As a specific example, the battery manager detects temperature information of the power battery pack in real time. When the battery temperature is higher than a set value, battery cooling function starting information is sent to a vehicle-mounted air conditioner controller through CAN communication, and when the battery temperature reaches the set value of cooling ending, battery cooling function ending information is sent. When the temperature of the battery is lower than a set value, battery heating function starting information is sent to a vehicle-mounted air conditioner controller through CAN communication, and when the temperature of the battery reaches the set value of heating end, battery heating function ending information is sent. The battery management controller can estimate the current heat productivity of the battery through the current discharging/charging current of the battery, estimate the actual cooling/heating efficiency of the system through the difference value between the current average temperature of the battery and the target temperature value of the battery, and send the required heating/cooling power information of the battery to the vehicle-mounted air conditioner controller. The battery management controller can transmit battery temperature difference information to the battery management controller by comparing the battery temperature difference between the first battery 61 and the second battery 62, and the battery temperature difference between the batteries can be reduced by controlling the working states of the forward pump 511 and the reverse pump 512 to change the medium flow direction. For example, when the battery cooling function is started, if the battery temperature of the first battery 61 is higher than that of the second battery 62 and the difference exceeds a set value, the battery thermal management controller controls the forward pump 511 to operate, and the medium flows through the first battery 61 and then flows through the second battery 62; if the battery temperature of the second battery 62 is higher than the battery temperature of the first battery 61 and the difference exceeds the set value, the battery thermal management controller controls the reverse pump 512 to work, and the medium flows through the second battery 62 and then flows through the first battery 61.
When the vehicle does not start the battery heating or battery cooling function, if the battery management controller detects that the battery temperature difference between the batteries exceeds a set value, the vehicle-mounted air conditioner controller sends the starting information of the internal circulation function of the batteries, after receiving the information, the vehicle-mounted air conditioner controller forwards the information to the battery thermal management controller, the battery thermal management controller controls the forward pump 511 to work, the reverse pump 511 is started to drive a medium in the cooling loop, and the battery temperature of the battery box body is balanced through the medium.
In addition, in order to maintain the temperature of the first battery 61 and the second battery 62 to be equalized, if the battery temperature difference between the temperature T61 of the first battery 61 and the temperature T62 of the second battery 62 exceeds a preset temperature (e.g., 3 ℃) during the cooling of the batteries, i.e., T61-T62 > 3 ℃, the battery thermal management controller controls the forward pump to be turned on so that the medium flows through the first battery 61 first and then through the second battery 62, thereby achieving the temperature equalization of the first battery 61 and the second battery 62. And if the temperature T62-T61 is more than 3 ℃, the battery thermal management controller controls the reverse pump to be started, so that the medium flows through the second battery 62 firstly and then flows through the first battery 61, and the temperature equalization of the first battery 61 and the second battery 62 is realized.
It should be noted that details not disclosed in the temperature regulation system of the vehicle-mounted battery shown in fig. 12 and details disclosed in the temperature regulation system of the vehicle-mounted battery shown in fig. 4 are not described in detail here to avoid redundancy.
Fig. 15 is a schematic structural view of the operation of a forward pump in the temperature regulation system of the vehicle-mounted battery according to the ninth embodiment of the invention. Fig. 15A is a schematic structural view of the operation of the reverse pump in the temperature regulation system of the vehicle-mounted battery according to the ninth embodiment of the invention. As shown in fig. 15 and 15A, compared to the temperature regulation system of the vehicle-mounted battery shown in fig. 12, the second flow rate sensors 441 and 442, the third temperature sensors 451 and 452, and the fourth temperature sensors 1A and 1B are eliminated, so that the structure is made simpler.
The operating principle of the temperature control system for the vehicle-mounted battery shown in fig. 15 is the same as that of the temperature control system for the vehicle-mounted battery shown in fig. 12, and detailed description thereof is omitted.
Therefore, in the temperature regulating system of the vehicle-mounted battery in the embodiment of the invention, the battery is provided with cooling power by more than 2 refrigeration loops, the refrigeration power is larger, and each refrigeration loop is provided with the refrigeration power by one compressor. And the vehicle-mounted air conditioning system is composed of a plurality of refrigeration loops, each refrigeration loop can independently control the refrigeration capacity, and the refrigeration capacity of each refrigeration loop is adjusted according to the requirements of the system. In addition, a plurality of batteries are connected in series for cooling/heating, and the system can control the cooling capacity/heating capacity of the plurality of batteries in series only by controlling the medium flow on the cooling main loop and the medium temperature. In addition, the refrigerant flow paths between the plurality of compressors are not communicated, and the cooling powers of the plurality of compressors are respectively transmitted to the cooling circulation circuit of the battery through the heat exchangers, and the cooling powers are superposed through the heat exchangers.
In summary, according to the temperature adjustment system of the vehicle-mounted battery in the embodiment of the invention, the controller controls the battery temperature adjustment module to adjust the temperature of the battery. Therefore, the system can adjust the temperature when the temperature of the vehicle-mounted battery is too high or too low, so that the temperature of the vehicle-mounted battery is maintained in a preset range, and the condition that the performance of the vehicle-mounted battery is influenced by the temperature is avoided.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (14)

1. A temperature adjustment system of a vehicle-mounted battery, characterized by comprising:
the vehicle-mounted air conditioning module comprises a refrigeration branch and battery cooling branches connected with the refrigeration branch in series, wherein the refrigeration branch comprises at least one compressor and a condenser connected with the compressor, and each battery cooling branch comprises a heat exchanger in one-to-one correspondence with the compressor and a valve connected with the heat exchanger;
the battery temperature adjusting module is connected with the battery cooling branch to form a heat exchange flow path and comprises a pump, a first temperature sensor, a second temperature sensor, a flow velocity sensor and a heater, wherein the pump is arranged on the heat exchange flow path, and the pump is used for enabling a medium in the heat exchange flow path to flow; the first temperature sensor is used for detecting the inlet temperature of the medium flowing into the battery; the second temperature sensor is used for detecting the outlet temperature of the medium flowing out of the battery; the flow velocity sensor is used for detecting the flow velocity of the medium in the heat exchange flow path; the heater is used for heating the medium in the heat exchange flow path;
the battery state detection module is connected with the battery and is used for detecting the current of the battery;
a controller connected to the vehicle-mounted air conditioning module and the battery temperature adjusting module for adjusting the temperature of the battery, the controller including: a battery management controller, a battery thermal management controller, and a vehicle air conditioning controller, wherein,
the battery management controller is connected with the battery state detection module and used for acquiring the required power for temperature regulation of the battery;
the battery thermal management controller is connected with the pump, the first temperature sensor, the second temperature sensor, the flow rate sensor and the heater, and is used for acquiring the temperature regulation actual power of the battery and regulating the power of the heater according to the temperature regulation required power and the temperature regulation actual power so as to regulate the temperature of the battery;
and the vehicle-mounted air conditioner controller is connected with the compressor and the valve and is used for adjusting the power of the compressor according to the temperature adjustment required power and the temperature adjustment actual power so as to adjust the temperature of the battery.
2. The temperature adjustment system of the vehicle-mounted battery according to claim 1, wherein the battery temperature adjustment module further includes: a media container disposed on the heat exchange flow path, the media container for storing and providing media to the heat exchange flow path.
3. The vehicle-mounted battery thermostat system of claim 1, wherein the battery management controller is further configured to obtain a temperature of the battery, the thermostat system enters a cooling mode when the temperature of the battery is greater than a first temperature threshold, and the thermostat system enters a heating mode when the temperature of the battery is less than a second temperature threshold.
4. The temperature regulation system of a vehicle-mounted battery according to claim 3,
when the required power for temperature regulation is larger than the actual power for temperature regulation, the vehicle-mounted air conditioner controller acquires a power difference between the required power for temperature regulation and the actual power for temperature regulation;
when in the cooling mode, the on-vehicle air-conditioning controller increases at least one of the power of the compressor for cooling the battery and the opening degree of the valve in accordance with the power difference, and decreases/maintains at least one of the power of the compressor for the battery and the opening degree of the valve when the temperature regulation required power is less than or equal to the temperature regulation actual power;
when the battery thermal management controller is in the heating mode, the battery thermal management controller increases the power of a heater for heating the battery according to the power difference, and reduces/maintains the power of the heater when the temperature adjustment required power is less than or equal to the temperature adjustment actual power.
5. The temperature adjustment system of the vehicle-mounted battery according to claim 4,
the battery thermal management controller is also used for reducing/maintaining the rotating speed of the pump when the temperature regulation required power is less than or equal to the temperature regulation actual power;
and when the temperature regulation required power is greater than the temperature regulation actual power, the battery thermal management controller is also used for increasing the rotating speed of the pump.
6. The temperature adjustment system of the vehicle-mounted battery according to claim 1, wherein the battery is plural, and the heat exchange flow paths between the plural batteries are communicated with each other.
7. The vehicle-mounted battery temperature regulation system according to claim 1, wherein the number of the pumps is two, wherein the two pumps are opposite in rotation direction and are connected in parallel; alternatively, the number of the pumps is one, and the pump is a bidirectional pump.
8. The vehicle battery thermostat system of claim 1, wherein said vehicle air conditioning module further includes an in-vehicle cooling branch in series with said cooling branch and in parallel with said battery cooling branch.
9. The vehicle-mounted battery temperature regulation system according to claim 1, wherein the heat exchanger is a plate heat exchanger.
10. The temperature adjustment system of the vehicle-mounted battery according to claim 1, characterized in that the heat exchange flow path includes a first flow path and a second flow path in the battery, wherein the flow directions of the media in the first flow path and the second flow path are opposite, and an inlet of the first flow path is connected to an inlet of the second flow path, and an outlet of the first flow path is connected to an outlet of the second flow path.
11. The temperature adjustment system of the vehicle-mounted battery according to claim 1, wherein the battery is plural, further comprising:
and third temperature sensors are arranged on the heat exchange flow paths between the adjacent batteries.
12. The temperature adjustment system for the vehicle-mounted battery according to claim 8, wherein the number of the compressors is plural, and the in-vehicle cooling branch is plural, each of the in-vehicle cooling branches including an evaporator in one-to-one correspondence with the compressors and a valve connected to the evaporator.
13. The vehicle-mounted battery temperature regulation system according to claim 1, wherein the battery cooling branch is plural, and each of the battery cooling branches is provided with a fourth temperature sensor for detecting a temperature of the medium on the battery cooling branch.
14. The system for regulating the temperature of a vehicle-mounted battery according to claim 13, wherein each of said battery cooling branches is further provided with a flow rate sensor for detecting a flow rate of a medium on said battery cooling branch.
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