CN111416180A - Lithium battery constant-temperature control thermal management system and application method thereof - Google Patents
Lithium battery constant-temperature control thermal management system and application method thereof Download PDFInfo
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- CN111416180A CN111416180A CN202010428620.0A CN202010428620A CN111416180A CN 111416180 A CN111416180 A CN 111416180A CN 202010428620 A CN202010428620 A CN 202010428620A CN 111416180 A CN111416180 A CN 111416180A
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
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- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
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- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
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- H01M10/615—Heating or keeping warm
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
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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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H01M10/635—Control systems based on ambient temperature
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
- H01M10/6555—Rods or plates arranged between the cells
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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- 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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
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- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/6595—Means for temperature control structurally associated with the cells by chemical reactions other than electrochemical reactions of the cells, e.g. catalytic heaters or burners
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- 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
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Abstract
A constant temperature control thermal management system for a lithium battery and a using method thereof comprise a battery box, a heat exchange mechanism, a heating mechanism, a water pump, a water tank, a refrigerating mechanism and a control mechanism, wherein the heat exchange mechanism is arranged on one side of the battery box; the invention achieves good effect: the lithium battery constant temperature control thermal management system and the use method thereof realize accurate control of different temperatures of the lithium battery in different seasons through reasonable carrying of the battery box, the heat exchange mechanism, the heating mechanism, the water pump, the water tank, the refrigeration structure and the control mechanism, so that the electric automobile can be maintained in an optimal working temperature range in hot weather at high temperature or cold winter at low temperature, the power consumption of the whole automobile is reduced, the endurance mileage of the whole automobile is prolonged, the service life of the storage battery is prolonged, and the use cost of a user is reduced.
Description
Technical Field
The invention relates to the field of new energy automobiles, in particular to a lithium battery constant-temperature control thermal management system and a using method thereof.
Background
The power battery assembly is used as a power source of an electric automobile, is a key ring for improving the performance of the whole automobile and reducing the cost, the temperature characteristic of the power battery assembly directly influences the performance, the service life and the durability of the automobile, and the lithium ion battery is used as a currently preferred power storage battery due to the advantages of large specific energy, long cycle life, low self-discharge rate, wide allowable working temperature range, good low-temperature effect and the like, particularly the battery temperature control of a high-power vehicle is an important factor for stable working of the battery, so that the temperature uniformity among the batteries is required to be maintained while the single batteries in the battery are ensured to work in a reasonable temperature range; at present, in the existing lithium battery thermal management system, the cooling mode mainly adopts air cooling and liquid cooling; the heating mode mainly adopts heating plate and liquid heating or PTC heating, and its inefficiency, effect are poor, the inhomogeneity of battery electric core monomer temperature has aggravated that lithium cell pressure difference is big, SOC descends, seriously influences the life and the use cost of lithium cell.
Disclosure of Invention
The invention provides a constant-temperature control thermal management system for a lithium battery and a use method thereof, which are used for solving the problems that the service life and the use cost of the lithium battery are influenced due to large pressure difference of the lithium battery, which is aggravated by low temperature control efficiency and poor effect of a battery core of the conventional electric automobile and nonuniformity of the temperature of a single battery cell of a storage battery.
The above object of the present invention is achieved by the following technical means: a constant-temperature control thermal management system for a lithium battery comprises a battery box, a heat exchange mechanism, a heating mechanism, a water pump, a water tank, a refrigerating mechanism and a control mechanism, wherein the heat exchange mechanism is arranged on one side of the battery box; the battery box is externally provided with a box body with power batteries at intervals, and one side of the battery box is provided with a heat exchange mounting hole; the heat exchange mechanism is a water circulation heat exchanger and consists of a water jacket and a heat conducting plate, the water jacket is horizontally arranged on the heat exchange mounting port side of the battery box in the transverse direction, and the heat conducting plate is longitudinally arranged on the rear side of the water jacket in parallel; the water jacket is of a rectangular shell structure, a water outlet through hole is formed in the left side of the water jacket, a water outlet joint is arranged on the outer side of the water outlet through hole, a water inlet through hole is formed in the right side of the water jacket, and a water inlet joint is arranged on the outer side of the water inlet through hole; the rear side surface of the water jacket is uniformly provided with vertical rectangular mounting grooves, and temperature sensors C are arranged in the water inlet joint and the water outlet joint; the heat-conducting plate is a rectangular plate vertically arranged in the longitudinal direction, the front end of the heat-conducting plate is matched and installed with the installation groove of the water jacket, and two sides of the rear part of the heat-conducting plate are in contact with the side face of the power battery in the battery box.
The water pump is driven by a speed-adjustable motor, a water inlet of the water pump is connected with a water outlet of the water jacket of the heat exchange mechanism through a water pipe, and the speed-adjustable motor is connected with the control mechanism through an electric wire.
The heating mechanism is a fuel oil or gas heater, a water inlet of the heating mechanism is connected with a water outlet of the water pump through a water pipe, temperature sensors A are arranged at the water inlet and the water outlet of the heating mechanism, and the temperature sensors A are connected with the control mechanism through electric wires.
The water tank be closed storage water tank, the inboard lower part of water tank is provided with the refrigeration coil pipe, the refrigeration coil pipe both ends set up in the outside of water tank, the both sides of water tank are provided with respectively by water inlet and delivery port, water piping connection passes through between the water inlet of water tank and the heating mechanism delivery port, water piping connection passes through between the delivery port of water tank and the heat exchange mechanism water jacket water inlet, the water inlet of water tank and delivery port end all are provided with temperature sensor B, temperature sensor B passes through the electric wire and is connected with control mechanism.
The refrigerating mechanism is a circulating refrigerator and comprises a compressor and radiating fins, the compressor is connected with two ends of a refrigerating coil of the water tank through a copper pipe, the radiating fins are connected with the compressor through pipelines, the refrigerating mechanism and the refrigerating coil are filled with refrigerants, and the compressor of the refrigerating mechanism is connected with the control mechanism through an electric wire.
The control mechanism is an ECU electronic controller unit.
A use method of a lithium battery constant temperature control thermal management system comprises the following steps:
when the battery temperature is lower than the design temperature:
a) firstly, igniting a heating mechanism to heat circulating water in the heating mechanism, transmitting temperature signals to a control mechanism by temperature sensors at a water inlet end and a water outlet end of the heating mechanism, controlling the heating amount of the heating mechanism by the control mechanism, and starting a water pump to enable the circulating water in the system to circularly flow;
b) the heated circulating water enters the water tank, the sensors in the water inlet and the water outlet of the water tank transmit temperature signals to the control mechanism, and the control mechanism controls the rotating speed of a motor of the water pump so as to control the flow rate of the circulating water;
c) circulating water in the water tank flows into the heat exchange mechanism, and the circulating water in the water jacket of the heat exchange mechanism heats the batteries in the battery box through the heat conducting plate;
d) after the heat is radiated by the circulating water in the water jacket, the circulating water returns to the heater for reheating, and the heated circulating water enters the heat exchange mechanism again through the water pump and the water tank for battery heating;
e) when the battery reaches the designed temperature, the control mechanism controls the heating mechanism to stop working, and the water pump continuously works to circulate the liquid of the whole system to finish heating the battery; when the temperature is lower than the set value, the heating mechanism is ignited again to start the heating mode through the ECU control unit, so that the liquid is maintained in a certain temperature range, and the heating is started and stopped repeatedly, thereby heating the battery;
when the battery temperature is higher than the design temperature:
a) firstly, controlling the refrigeration mechanism to work through a control mechanism, and starting a water pump at the same time to enable circulating water in the system to circularly flow and enter a water tank;
b) circulating water enters the water tank, a refrigeration coil on the inner side of the water tank quickly absorbs heat of the circulating water, sensors in a water inlet and a water outlet of the water tank transmit temperature signals to the control mechanism, and the control mechanism controls the rotating speed of a motor of the water pump, so that the flow rate of the circulating water is controlled;
c) the refrigeration mechanism distributes heat absorbed by the refrigerant in the refrigeration coil out of a heat exchanger of the refrigeration mechanism, and then the cooled refrigerant enters the water tank from the inlet of the refrigeration coil of the water tank again to cool the circulating water;
d) after the heat transferred from the battery to the heat-conducting plate is absorbed, the circulating water with the increased temperature enters the water jacket from the water tank through the refrigeration and expansion cooling circulating water, and then returns to the water tank through the heating mechanism (not started) and the water pump to enter the water tank for cooling;
e) when the battery reaches the designed temperature, the refrigeration mechanism stops refrigerating, and the water pump continuously works to circulate the liquid of the whole system to finish cooling the battery; when the temperature is higher than the set value, the refrigeration mechanism restarts the refrigeration mode through the control mechanism to maintain the liquid in a certain temperature range, and the refrigeration is repeatedly started and stopped, thereby realizing the cooling of the battery.
The invention achieves good effect: the lithium battery constant temperature control thermal management system and the use method thereof realize accurate control of different temperatures of the lithium battery in different seasons through reasonable carrying of the battery box, the heat exchange mechanism, the heating mechanism, the water pump, the water tank, the refrigeration structure and the control mechanism, so that the electric automobile can be maintained in an optimal working temperature range in hot weather at high temperature or cold winter at low temperature, the power consumption of the whole automobile is reduced, the endurance mileage of the whole automobile is prolonged, the service life of the storage battery is prolonged, and the use cost of a user is reduced.
Drawings
FIG. 1 is a diagram of the present invention.
Fig. 2 is a schematic structural diagram of the battery box and the heat exchange mechanism in fig. 1.
Fig. 3 is a schematic structural view of the water tank of fig. 1.
Fig. 4 is a schematic structural diagram of the refrigeration mechanism in fig. 1.
In the figure: 1. the battery box, 1.1, the box, 1.2, power battery, 2, control mechanism, 3, the water pump, 4, heating mechanism, 4.1, temperature sensor A, 5, the water tank, 5.1, refrigeration coil, 5.2, temperature sensor B, 6, refrigeration mechanism, 6.1, compressor, 6.2, fin, 7, heat transfer mechanism, 7.1, the water jacket, 7.2, temperature sensor C, 7.3, the heat-conducting plate.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
a constant-temperature control thermal management system for a lithium battery comprises a battery box 1, a heat exchange mechanism 7, a heating mechanism 4, a water pump 3, a water tank 5, a refrigeration structure 6 and a control mechanism 2, wherein a box body 1.1 with power batteries 1.2 arranged inside is arranged outside the battery box 1 at intervals, and one side of the battery box 1 is provided with a heat exchange mounting hole; the heat exchange mechanism 7 is arranged on one side of the battery box 1, the heat exchange mechanism 7 is a water circulation heat exchanger and consists of a water jacket 7.1 and a heat conducting plate 7.3, the water jacket 7.1 is transversely and horizontally arranged on the heat exchange mounting port side of the battery box 1, the water jacket 7.1 is of a rectangular shell structure, the left side of the water jacket 7.1 is provided with a water outlet through hole, the outer side of the water outlet through hole is provided with a water outlet joint, the right side of the water jacket 7.1 is provided with a water inlet through hole, and the outer side of the water inlet through hole is provided with a water inlet; vertical rectangular mounting grooves are uniformly formed in the rear side face of the water jacket 7.1, and temperature sensors C7.2 are arranged in the water inlet joint and the water outlet joint; the heat conducting plate 7.3 is longitudinally arranged on the rear side of the water jacket 7.1 in parallel, the heat conducting plate 7.3 is a rectangular plate vertically arranged in the longitudinal direction, the front end of the heat conducting plate 7.3 is matched and installed with the installation groove of the water jacket, and two sides of the rear part of the heat conducting plate 7.3 are contacted with the side surface of the power battery 1.2 in the battery box 1; the water pump 3 is arranged on one side of the heat exchange mechanism 7, the water pump 3 is driven by a speed-adjustable motor, a water inlet of the water pump 3 is connected with a water outlet of a water jacket 7.1 of the heat exchange mechanism 7 through a water pipe, and the speed-adjustable motor is connected with the control mechanism 2 through an electric wire;
the heating mechanism 4 is arranged on one side of the water pump 3, the heating mechanism 4 is a fuel oil or gas heater, a water inlet of the heating mechanism 4 is connected with a water outlet of the water pump 3 through a water pipe, temperature sensors A4.1 are arranged at the water inlet and the water outlet of the heating mechanism 4, and the temperature sensors A4.1 are connected with the control mechanism 2 through electric wires; the water tank 5 is arranged between the heating mechanism 4 and the heat exchange mechanism 7.1, the water tank 5 is a closed water storage tank, the lower part of the inner side of the water tank 5 is provided with a refrigeration coil pipe 5.1, two ends of the refrigeration coil pipe 5.1 are arranged on the outer side of the water tank 5, two sides of the water tank 5 are respectively provided with a water inlet and a water outlet, the water inlet of the water tank 5 is connected with the water outlet of the heating mechanism 4 through a water pipe, the water outlet of the water tank 5 is connected with the water inlet of the water jacket of the heat exchange mechanism through a water pipe, the water inlet and the water outlet of the water tank are both provided with a temperature sensor B5.2; the refrigerating mechanism 6 is arranged on one side of the water tank 5, the refrigerating mechanism 6 is a circulating refrigerator and consists of a compressor 6.1 and a radiating fin 6.2, the compressor 6.1 is connected with two ends of a refrigerating coil 5.1 of the water tank 5 through a copper pipe, the radiating fin 6.1 is connected with the compressor 6.1 through a pipeline, the refrigerating mechanism 6, the refrigerating coil 5.1 and the radiating fin 6.2 are filled with refrigerants, and the compressor 6.1 of the refrigerating mechanism 6 is connected with the control mechanism 2 through an electric wire; the control mechanism 2 is arranged on one side of the battery box 1, and the control mechanism 2 is an ECU electronic control unit.
The application method of the lithium battery constant temperature control thermal management system comprises the following steps:
in cold season, when the lithium battery is charged and discharged, and the temperature of the power battery 1.2 is lower than the design temperature: a) firstly, the heating mechanism 4 is ignited to heat the circulating water in the heating mechanism 4, temperature sensors A4.1 at the water inlet and the water outlet of the heating mechanism 4 transmit temperature signals back to the control mechanism 2, the control mechanism 2 controls the heating amount of the heating mechanism, and simultaneously, the water pump 3 is started to enable the circulating water in the system to circularly flow;
b) the heated circulating water enters the water tank 5, temperature sensors B5.2 in a water inlet and a water outlet of the water tank transmit temperature signals to the control mechanism, and the control mechanism 2 controls the rotating speed of a motor of the water pump 3 so as to control the flow rate of the circulating water;
c) then circulating water in the water tank flows into the heat exchange mechanism 7, and the circulating water in the water jacket 7.1 of the heat exchange mechanism 7 heats the power battery 1.2 in the battery box 1 through the heat conducting plate 7.3;
d) after the heat is radiated by the circulating water in the water jacket 7.1, the circulating water returns to the heating mechanism 4 to be heated again, and the heated circulating water enters the heat exchange mechanism 7 again through the water pump 3 and the water tank 5 to be heated by the power battery 1.2;
e) when the power battery 1.2 reaches the designed temperature, the control mechanism 2 controls the heating mechanism 4 to stop working, and the water pump 3 continuously works to circulate the circulating water of the whole system to finish heating the power battery 1.2; when the temperature is lower than the set value, the heating mechanism 4 ignites again through the control mechanism to start the heating mode, so that the circulating water is maintained in a certain temperature range, and the heating is started and stopped repeatedly, so that the heating of the power battery 1.2 is realized;
the lithium battery is charged and discharged in high-temperature seasons in summer, and when the temperature of the power battery 1.2 is higher than the design temperature: a) firstly, the control mechanism 2 controls the refrigeration mechanism 6 to work, the water pump 3 is started at the same time, circulating water in the system flows circularly, and the circulating water enters the water tank 5;
b) circulating water enters the water tank 5, a refrigeration coil 5.1 on the inner side of the water tank 5 quickly absorbs heat of the circulating water, temperature sensors B5.2 in a water inlet and a water outlet of the water tank 5 transmit temperature signals to the control mechanism, and the control mechanism 2 controls the rotating speed of a motor of the water pump 3 so as to control the flow rate of the circulating water;
c) the refrigerating mechanism 6 radiates heat absorbed by the refrigerant in the refrigerating coil 5.1 out from the radiating fins 6.2 of the refrigerating mechanism 6, and then the cooled refrigerant enters the water tank 5 again from the inlet of the refrigerating coil 5.1 of the water tank 5 to cool the circulating water;
d) circulating water is cooled from the water tank 5 through a refrigeration coil 5.1 and enters the water jacket 7.1, heat transferred from the power battery 1.2 to the heat conducting plate 7.3 is absorbed, and then the circulating water with increased temperature returns to the water tank through the heating mechanism 4 (not started) and the water pump 3 to enter for cooling;
e) when the power battery 1.2 reaches the designed temperature, the refrigeration mechanism 6 stops refrigerating, and the water pump 3 continuously works to circulate the circulating water of the whole system, so as to finish cooling the power battery 1.2; when the temperature is higher than the set value, the refrigeration mechanism 6 restarts the refrigeration mode through the control mechanism 2 to maintain the circulating water in a certain temperature range, and the refrigeration is repeatedly started and stopped, so that the power battery 1.2 is cooled.
The present invention is not described in detail in the prior art.
Claims (7)
1. The utility model provides a lithium cell thermostatic control thermal management system, includes battery box (1), heat transfer mechanism (7), heating mechanism (4), water pump (3), water tank (5), refrigeration structure and control mechanism (2), characterized by: the heat exchange mechanism (7) is arranged on one side of the battery box (1), the water pump (3) is arranged on one side of the heat exchange mechanism (7), the heating mechanism (4) is arranged on one side of the water pump (3), the water tank (5) is arranged between the heating mechanism (4) and the heat exchange mechanism (7), the refrigerating mechanism (6) is arranged on one side of the water tank (5), and the control mechanism (2) is arranged on one side of the battery box (1); the battery box (1) is a box body (1.1) with power batteries (1.2) arranged inside at intervals, and one side of the battery box (1) is provided with a heat exchange mounting hole; the heat exchange mechanism (7) is a water circulation heat exchanger and consists of a water jacket (7.1) and a heat conducting plate (7.3), the water jacket (7.1) is horizontally arranged on the heat exchange mounting port side of the battery box (1), and the heat conducting plate (7.3) is longitudinally arranged on the rear side of the water jacket (7.1) in parallel; the water jacket (7.1) is of a rectangular shell structure, a water outlet through hole is formed in the left side of the water jacket (7.1), a water outlet joint is arranged on the outer side of the water outlet through hole, a water inlet through hole is formed in the right side of the water jacket (7.1), and a water inlet joint is arranged on the outer side of the water inlet through hole; vertical rectangular mounting grooves are uniformly formed in the rear side face of the water jacket (7.1), and temperature sensors C (7.2) are arranged in the water inlet joint and the water outlet joint; the heat-conducting plate (7.3) be the rectangular plate of vertical setting, the front end of heat-conducting plate (7.3) and the mounting groove cooperation installation of water jacket (7.1), the rear portion both sides and the power battery (1.2) side contact in battery box (1) of heat-conducting plate (7.3).
2. The lithium battery thermostatic control thermal management system according to claim 1, which is characterized in that: the water pump (3) is driven by a speed-adjustable motor, a water inlet of the water pump (3) is connected with a water outlet of a water jacket (7.1) of the heat exchange mechanism (7) through a water pipe, and the speed-adjustable motor is connected with the control mechanism (2) through an electric wire.
3. The lithium battery thermostatic control thermal management system according to claim 1, which is characterized in that: heating mechanism (4) be fuel or gas heater, water piping connection between the water inlet of heating mechanism (4) and water pump (3) delivery port, the water inlet of heating mechanism (4) and delivery port end all are provided with temperature sensor A (4.1), temperature sensor A (4.1) are connected with control mechanism (2) through the electric wire.
4. The lithium battery thermostatic control thermal management system according to claim 1, which is characterized in that: water tank (5) be closed storage water tank (5), the inboard lower part of water tank (5) is provided with refrigeration coil pipe (5.1), refrigeration coil pipe (5.1) both ends set up the outside at water tank (5), the both sides of water tank (5) are provided with respectively by water inlet and delivery port, water piping connection passes through between the water inlet of water tank (5) and heating mechanism (4) delivery port, water piping connection passes through between the delivery port of water tank (5) and heat transfer mechanism (7) water jacket (7.1) water inlet, the water inlet and the delivery port end of water tank (5) all are provided with temperature sensor B (5.2), temperature sensor B (5.2) are connected with control mechanism (2) through the electric wire.
5. The lithium battery thermostatic control thermal management system according to claim 1, which is characterized in that: the refrigerating mechanism (6) is a circulating refrigerator and comprises a compressor (6.1) and radiating fins (6.2), the compressor (6.1) is connected with two ends of a refrigerating coil (5.1) of the water tank (5) through copper pipes, the radiating fins (6.2) are connected with the compressor (6.1) through pipelines, refrigerants are filled in the refrigerating mechanism (6) and the refrigerating coil (5.1) and the radiating fins (6.2) respectively, and the compressor (6.1) of the refrigerating mechanism (6) is connected with the control mechanism (2) through electric wires.
6. The lithium battery thermostatic control thermal management system according to claim 1, which is characterized in that: the control mechanism (2) is an ECU electronic controller unit.
7. A use method of a lithium battery constant temperature control thermal management system comprises the following steps:
when the temperature of the power battery (1.2) is lower than the design temperature:
a) firstly, igniting a heating mechanism (4), heating circulating water in the heating mechanism (4), transmitting temperature signals to a control mechanism (2) by temperature sensors A (4.1) at a water inlet end and a water outlet end of the heating mechanism (4), controlling the heating amount of the heating mechanism (4) by the control mechanism (2), and starting a water pump (3) to enable the circulating water in the system to circularly flow;
b) the heated circulating water enters the water tank (5), temperature sensors B (5.2) in a water inlet and a water outlet of the water tank (5) transmit temperature signals to the control mechanism (2), and the control mechanism (2) controls the rotating speed of a motor of the water pump (3) so as to control the flow rate of the circulating water;
c) circulating water in the water tank (5) flows into the heat exchange mechanism (7), and the circulating water in the water jacket (7.1) of the heat exchange mechanism (7) heats the power battery (1.2) in the battery box (1) through the heat conducting plate (7.3);
d) after the heat is radiated by the circulating water in the water jacket (7.1), the circulating water returns to the heating mechanism (4) for reheating, and the heated circulating water enters the heat exchange mechanism (7) through the water pump (3) and the water tank (5) again for reheating the power battery (1.2);
e) when the battery reaches the designed temperature, the control mechanism (2) controls the heating mechanism (4) to stop working, and the water pump (3) continuously works to circulate the circulating water of the whole system to finish heating the power battery (1.2); when the temperature is lower than the set value, the heating mechanism (4) re-ignites to start the heating mode through the control mechanism (2), so that the circulating water is maintained in a certain temperature range, and the heating is repeatedly started and stopped, so that the heating of the power battery (1.2) is realized;
when the temperature of the power battery (1.2) is higher than the design temperature:
a) firstly, a control mechanism (2) is used for controlling a refrigerating mechanism (6) to work, a water pump (3) is started simultaneously, circulating water in the system flows in a circulating mode, and the circulating water enters a water tank (5);
b) circulating water enters the water tank (5), a refrigeration coil (5.1) on the inner side of the water tank (5) rapidly absorbs heat of the circulating water, temperature sensors B (5.2) in a water inlet and a water outlet of the water tank (5) transmit temperature signals to the control mechanism (2), and the control mechanism (2) controls the rotating speed of a motor of the water pump (3), so that the flow rate of the circulating water is controlled;
c) the refrigeration mechanism (6) distributes heat absorbed by the refrigerant in the refrigeration coil (5.1) from a heat exchanger of the refrigeration mechanism (6), and then the cooled refrigerant enters the water tank (5) from an inlet of the refrigeration coil (5.1) of the water tank (5) again to cool the circulating water;
d) circulating water is cooled from the water tank (5) through the refrigeration coil (5.1) and enters the water jacket (7.1), heat transferred from the power battery (1.2) to the heat conducting plate (7.3) is absorbed, and then the circulating water with increased temperature returns to the water tank (5) through the heating mechanism (4) (not started) and the water pump (3) to enter for cooling;
e) when the battery reaches the designed temperature, the refrigeration mechanism (6) stops refrigerating, and the water pump (3) continuously works to circulate the circulating water of the whole system, so that the power battery (1.2) is cooled; when the temperature is higher than the set value, the refrigeration mechanism (6) restarts the refrigeration mode through the control mechanism (2) to maintain the circulating water in a certain temperature range, and the refrigeration is repeatedly started and stopped, so that the power battery (1.2) is cooled.
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| CN113701654A (en) * | 2021-04-19 | 2021-11-26 | 唐德科技（深圳）有限公司 | High-temperature workpiece warping testing equipment based on CCD technology |
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| CN113701654A (en) * | 2021-04-19 | 2021-11-26 | 唐德科技（深圳）有限公司 | High-temperature workpiece warping testing equipment based on CCD technology |
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| CN113815495A (en) * | 2021-10-29 | 2021-12-21 | 奇瑞商用车（安徽）有限公司 | System and method for improving low-temperature cruising ability of electric automobile |
| CN114032989A (en) * | 2021-11-19 | 2022-02-11 | 安徽通盛能源科技有限公司 | Low-temperature high-altitude lithium battery control system for electric loader and excavator |
| CN114614145A (en) * | 2022-03-15 | 2022-06-10 | 南通明诺电动科技股份有限公司 | Lithium battery temperature control system for new energy automobile |
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