CN115241562B - Cooling system and temperature control method of electric automobile - Google Patents
Cooling system and temperature control method of electric automobile Download PDFInfo
- Publication number
- CN115241562B CN115241562B CN202210721745.1A CN202210721745A CN115241562B CN 115241562 B CN115241562 B CN 115241562B CN 202210721745 A CN202210721745 A CN 202210721745A CN 115241562 B CN115241562 B CN 115241562B
- Authority
- CN
- China
- Prior art keywords
- temperature
- switch
- outlet
- signal line
- stage temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
-
- 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
- H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
-
- 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
- H01M10/65—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
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
-
- 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
- H01M10/65—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
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Automation & Control Theory (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a cooling system of an electric automobile, which comprises a cooling mechanism, a pump, an electric control simulation flow dividing valve, a motor, a power battery pack, an electric control three-way valve and a temperature switching mechanism, wherein the cooling mechanism, the pump, the electric control simulation flow dividing valve, the motor and the electric control three-way valve are sequentially connected through a pipeline according to the material flow direction; the outlet of the electric control simulation flow divider valve is connected with the inlet of the power battery pack, the outlet of the power battery pack is connected with the inlet of the temperature switching mechanism, and the outlet of the temperature switching mechanism is connected with the inlet of the electric control three-way valve; the refrigerating mechanism comprises a refrigerating fluid container, a fan and a refrigerator, and solves the problem of effectively cooling the cooling fluid around the motor and the battery. The invention has the advantages that: the effective cooling work of the electric automobile cooling pipeline under various different temperature conditions is realized, the working stability of the electric automobile motor and the battery is ensured, the driving safety is improved, and the energy consumption in the driving process of the electric automobile is reduced.
Description
Technical Field
The invention relates to the technical field of temperature control, in particular to a cooling system and a temperature control method of an electric automobile.
Background
At present, in a traditional electric automobile refrigeration pipeline, a motor and a battery respectively use different refrigeration loops, namely, different pipelines are adopted between the motor and upper and lower batteries for refrigeration. In addition, the cooling system of the conventional electric vehicle cooling system is generally controlled by a temperature sensing circuit board, and compared with a mechanical switching device, the cooling system is low in reliability and inconvenient to maintain subsequently.
Disclosure of Invention
The present invention is directed to a cooling system for an electric vehicle, which can solve the above problems. In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the application provides a cooling system of an electric automobile, which comprises a refrigerating mechanism, a pump, an electric control simulation flow dividing valve, a motor, a power battery pack, an electric control three-way valve and a temperature switching mechanism, wherein the refrigerating mechanism, the pump, the electric control simulation flow dividing valve, the motor and the electric control three-way valve are sequentially connected through a pipeline according to the material flow direction; the outlet of the electric control simulation flow divider valve No. 1 is connected with the inlet of a motor refrigerating fluid pipeline, the outlet of the electric control simulation flow divider valve No. 2 is connected with the inlet of a refrigerating fluid pipeline of the power battery pack, the temperature switching mechanism detects the temperature of the motor refrigerating fluid, the temperature switching mechanism detects the temperature of the refrigerating fluid of the power battery pack, the temperature switching switch and the temperature switching switch are used for controlling the opening and closing of the electric control three-way valve and the corresponding valve of the electric control simulation flow divider valve, and the refrigerating fluid at the outlet of the power battery pack and the refrigerating fluid at the outlet of the motor flow into the port No. 0 of the electric control flow divider together after being gathered; the refrigerating mechanism comprises a refrigerating fluid container, a fan and a refrigerator, wherein an outlet of the refrigerator is connected with an inlet of the fan refrigerating fluid pipeline, and an outlet of the fan refrigerating fluid pipeline is connected with an inlet of the refrigerating fluid container. The outlet No. 1, the outlet No. 2 and the outlet No. 3 are respectively a first outlet, a second outlet and a third outlet.
In the traditional electric automobile refrigeration pipeline in the prior art, a motor and a battery share the same refrigeration pipeline, the cooling liquid pipeline in the invention adopts the design of controlling the flow direction of cooling liquid by an electric control three-way valve, after cooling liquid is pumped by a cooling liquid water pump, the cooling liquid respectively flows to a motor cooling pipeline and a battery cooling pipeline in the form of a branched pipeline through an electric control simulation shunt valve, the sum of the cooling liquid flowing out of an outlet No. 1 and an outlet No. 2 is equal to the total amount of the cooling liquid flowing in an outlet No. 0 of the electric control simulation shunt valve, and the flow of the outlet No. 1 and the outlet No. 2 depends on the temperature of the motor and the temperature of the battery pack. The system controls different opening modes of the electric control three-way valve according to the temperatures of the motor and the battery pack measured by the temperature sensing change-over switch, realizes three different cooling modes of small circulation, a fan and a refrigerator, and ensures that the temperatures of the motor and the battery are normal under different temperature conditions; the temperature sensing change-over switch part comprises a temperature sensing mechanism, a switch mechanism, a circuit connecting part and a rebound mechanism; the temperature sensing mechanism comprises a temperature sensing rod, a first temperature bimetal reed and a second temperature bimetal reed, and is characterized in that the two bimetal reeds with different temperature expansion coefficients can deform at different temperatures; the invention adopts a motor and a battery to jointly refrigerate a loop, and controls mechanical temperature sensing switching, so that the invention is more economical and reliable.
In combination with the technical scheme provided by the above, in some possible implementation manners, the temperature switching mechanism comprises a temperature sensing mechanism, a switch mechanism, a circuit connection part and a rebound mechanism, the temperature sensing mechanism, the switch mechanism and the circuit connection part are sequentially connected, and the on-off position of the circuit connection part is controlled by the switch mechanism and the temperature sensing mechanism;
the temperature switching mechanism detects the temperature of the motor and the power battery pack and controls the opening and closing states of corresponding valves of the electric control simulation flow dividing valve and the electric control three-way valve, the temperature switching mechanism detects the temperature of refrigerating fluid of the motor, the temperature switching mechanism detects the temperature of the refrigerating fluid of the power battery pack, and the opening and closing states of the corresponding valves of the electric control three-way valve and the electric control simulation flow dividing valve are controlled by control signals of the two temperature switching mechanisms. The rebounding mechanism comprises a rebounding fixing rod, the rebounding fixing rod is fixedly connected in the control box through threads, a spring is arranged on the rebounding fixing rod, and a rebounding fixing cap used for limiting is arranged at the top of the rebounding fixing rod.
By combining the technical scheme provided by the above, in some possible implementation manners, the temperature sensing mechanism comprises a temperature sensing rod, a first-stage temperature sensing reed and a second-stage temperature sensing reed, one end of the first-stage temperature sensing reed is fixedly connected with the lower part of the temperature sensing rod, a first contact point is arranged on the movable end of the first-stage temperature sensing reed, and the first contact point, the switch mechanism and the circuit connecting part are matched with each other to work; the second-stage temperature sensing reed is fixedly connected with the upper part of the temperature sensing rod, a second contact point is arranged at the movable end of the second-stage temperature sensing reed, and the second contact point, the switch mechanism and the circuit connecting part are matched with each other to work. The temperature threshold of the first-stage temperature sensing reed is lower than that of the second-stage temperature sensing reed.
In some possible implementation manners, the circuit connecting portion includes a first signal line, a second signal line, a third signal line, and a fourth signal line, the first signal line, the second signal line, the third signal line, and the fourth signal line are all convexly disposed on the outer side wall of the control box, and the first signal line, the second signal line, the third signal line, and the fourth signal line are respectively connected to the switch mechanism.
By integrating the technical scheme provided by the above, in some possible implementation manners, the switch mechanism comprises a first connecting piece of a first-stage temperature switch, a second connecting piece of the first-stage temperature switch, a first connecting piece of a second-stage temperature switch and a second connecting piece of the second-stage temperature switch, wherein the first connecting piece of the first-stage temperature switch is fixedly connected with a first signal line, the first connecting piece of the second-stage temperature switch is fixedly connected with a third signal line, the second connecting piece of the first-stage temperature switch is fixedly connected with a second signal line, and the second connecting piece of the second-stage temperature switch is fixedly connected with a fourth signal line.
A temperature control method of a cooling system of an electric automobile comprises the following steps:
detecting the motor and the power supply the temperature of the cooling fluid surrounding the battery pack; when the highest temperature of the refrigerant liquid is detected to reach a preset temperature threshold value of the first-stage temperature sensing reed, the first-stage temperature sensing reed expands and contacts with a first connecting sheet of the first-stage temperature switch and a second connecting sheet of the first-stage temperature switch to form a passage;
switching on a path between the first signal line and a second signal line; opening a port 2 in the electric control three-way valve, enabling cooling liquid to pass through a motor cooling liquid pipeline and a power battery pack cooling liquid pipeline respectively, collecting the cooling liquid, flowing into the electric control three-way valve, flowing to the fan, and flowing back to the cooling liquid container to realize first-stage cooling;
when the highest temperature of the refrigerant liquid is detected to be lower than the preset temperature threshold value of the first-stage temperature sensing reed, the first-stage temperature sensing reed contracts, is disconnected with a first connecting sheet of the first-stage temperature switch and a second connecting sheet of the first-stage temperature switch, and disconnects a path between the first signal line and the second signal line;
and controlling an outlet No. 2 in the electric control three-way valve to be closed, an outlet No. 1 to be opened, collecting cooling liquid flowing out of the motor and the power battery pack to enter the electric control three-way valve, stopping flowing through the fan, directly flowing out of the outlet No. 1, stopping the fan to work, and switching to a circulation mode that the cooling liquid sequentially flows through the refrigerating liquid container, the motor and the power battery pack.
In combination with the above technical solutions, in some possible implementations, the temperature control method further includes the following steps:
the temperature of the cooling liquid around the motor and the power battery pack is detected; when the highest temperature of the refrigerant liquid is detected to reach the preset temperature threshold value of the second-stage temperature sensing reed, the second-stage temperature sensing reed expands and contacts with a first connecting sheet of the second-stage temperature switch and a second connecting sheet of the second-stage temperature switch to form a passage;
turning on a path between the third signal line and a fourth signal line; controlling the No. 3 outlet in the electric control three-way valve to be opened, collecting the cooling liquid from the motor cooling liquid pipeline and the power battery pack cooling liquid pipeline respectively, flowing into the electric control three-way valve, flowing to the refrigerator, flowing back to the fan, and flowing back to the cooling liquid container to realize secondary cooling;
when the highest temperature of the refrigerant liquid is detected to be lower than the preset temperature threshold value of the second-stage temperature sensing reed, the second-stage temperature sensing reed contracts, is disconnected with a first connecting sheet of the second-stage temperature switch and a second connecting sheet of the second-stage temperature switch, and is disconnected with a path between the third signal line and the fourth signal line; and controlling the No. 3 outlet in the electric control three-way valve to be closed, and the No. 2 outlet to be opened, wherein the cooling liquid stops flowing through the refrigerator, flows into the fan from the No. 2 outlet, then flows back to the cooling liquid container, and is switched to the first-stage cooling.
By combining the technical scheme provided by the above, in some possible implementation manners, the temperature threshold of the first-stage temperature sensing reed is 35-45 ℃, and the temperature threshold of the second-stage temperature sensing reed is 65-75 ℃.
The invention has the beneficial effects that: through the combination that sets up temperature sensing mechanism, on-off mechanism and circuit connection portion, realize multistage temperature control, when satisfying electric automobile motor and upper and lower battery surrounding coolant temperature rising, according to different temperature switch different cooling circulation modes, realize the effective cooling of motor and upper and lower battery surrounding coolant liquid. Because the refrigerating capacities required by the battery pack and the motor under different working conditions are different, reasonable refrigerating flow distribution can be carried out by adjusting the two-way flow distribution proportion of the electric control simulation shunt valve, the driving safety is improved, and the aim of accurate energy conservation is fulfilled.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a signal line according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a temperature switching mechanism according to an embodiment of the present invention.
Fig. 3 is a schematic overall structure diagram provided in the embodiment of the present invention.
Fig. 4 is a working schematic diagram of a pipeline of a cooling system of an electric vehicle according to an embodiment of the present invention.
The mark in the figure is: 1. a temperature sensing mechanism; 2. a switch mechanism; 3. a connecting portion; 4. a rebound mechanism; 11. a temperature sensing lever; 12. a first-stage temperature sensing reed; 13. a second stage temperature sensing reed; 21. a first connection tab of the first stage temperature switch; 22. a second connecting sheet of the first-stage temperature switch; 23. a first connection tab of a second stage temperature switch; 24. a second connecting sheet of the second-stage temperature switch; 31. a first signal line; 32. a second signal line; 33. a third signal line; 34. a fourth signal line; 41. rebounding the fixed rod; 42. a spring; 43. a rebound fixing cap; 50. a container of refrigerant fluid; 51. a pump; 52. an electrically controlled analog flow divider valve; 53. a motor; 54. a power battery pack; 55. an electrically controlled three-way valve; 56. a fan; 57. a refrigerator; 58. a first temperature sensitive switch; 59. a second temperature sensitive switch.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Example 1
As shown in fig. 1 to 4, the present embodiment provides a cooling system of an electric vehicle, which includes a refrigeration mechanism, a pump 51, an electrically controlled analog flow-dividing valve 52, a motor 53, a power battery pack 54, an electrically controlled three-way valve 55, and a temperature switching mechanism, wherein the refrigeration mechanism, the pump 51, the electrically controlled analog flow-dividing valve 52, the motor 53, the power battery pack 54, and the electrically controlled three-way valve 55 are connected in sequence through a pipeline according to a material flow direction; the No. 1 outlet of the electric control simulation diverter valve is connected with the inlet of a refrigerating fluid pipeline of the motor 53, the No. 2 outlet of the electric control simulation diverter valve 52 is connected with the inlet of a refrigerating fluid pipeline of the power battery pack 54, the power battery pack 54 and a summarizing instrument after the refrigerating fluid of the motor 53 flows out flow into the No. 0 inlet of the electric control three-way valve, the electric control three-way valve is provided with three outlets, the serial numbers are sequentially 1, 2 and 3, the outlets are respectively connected with the inlets of a refrigerating fluid container 50, a fan 56 and a refrigerator 57, the No. 1, 2 and 3 outlets are opened, the first temperature sensing switch 58 senses the temperature of the refrigerating fluid of the motor 53, and the second temperature sensing switch 59 senses the temperature of the power battery pack; the refrigerating mechanism comprises a refrigerating fluid container 50, a fan 56 and a refrigerator 57, wherein an outlet of the refrigerator 57 is connected with an inlet of a refrigerating fluid pipeline of the fan 56, and an outlet of the refrigerating fluid pipeline of the fan 56 is connected with an inlet of the refrigerating fluid container 50.
It should be noted that the temperature switching mechanism includes a temperature sensing mechanism 1, a switch mechanism 2, a circuit connection portion 3 and a rebounding mechanism 4, and the cooling system pipeline includes a cooling liquid container, a pump 51, an electric control analog flow dividing valve 52, a motor 53, a power battery pack 54, an electric control three-way valve 55, a fan 56 and a refrigerator 57; the temperature sensing mechanism 1 is connected with the switch mechanism 2, and the on-off of the switch mechanism 2 is controlled by different coefficients of thermal expansion and cold contraction of the first and second two-stage bimetal temperature sensing reeds; the switch mechanism 2 is connected with the circuit connecting part 3 and is realized by different switch-on modes: the small-circulation refrigeration mode, the fan 56 refrigeration mode and the refrigerator 57 refrigeration mode are switched; 2 leading-out terminals of the circuit connecting part 3 are fixedly connected with 2 connecting pieces of the switch mechanism 2.
In some optional embodiments, the temperature switching mechanism comprises a temperature sensing mechanism 1, a switch mechanism 2, a circuit connecting part 3 and a rebound mechanism 4, wherein the rebound mechanism 4, the temperature sensing mechanism 1, the switch mechanism 2 and the circuit connecting part 3 are connected in sequence, and the on-off of the circuit connecting part 3 is controlled by the switch mechanism 2 and the temperature sensing mechanism 1;
the control signal circuit of the temperature switching mechanism is respectively communicated with the electric control simulation diverter valve 52 and the electric control three-way valve 55, the first temperature sensing switch 58 detects the temperature of the refrigerant fluid of the motor 53, the control signal circuit of the second temperature sensing switch 59 is respectively communicated with the electric control simulation diverter valve 52 and the electric control three-way valve 55, and the second temperature sensing switch 59 detects the temperature of the power battery pack 54.
It should be noted that, in the two-stage temperature control switch in the temperature sensing mechanism 1, the operating temperature threshold of the first-stage bimetal temperature sensing reed is 40 ℃ ± 5 ℃, and the operating temperature threshold of the second-stage bimetal temperature sensing reed is 70 ℃ ± 5 ℃; the switch structure is connected with the circuit connecting part 3, and the circuit connecting part 3 and the switch structure are fixed through bolts; the on-off of the circuit connecting part 3 is controlled by the switch mechanism 2 and the temperature sensing mechanism 1; when the temperature of the rebound mechanism 4 is reduced, the auxiliary temperature sensing mechanism 1 and the switch mechanism 2 work to assist the first-stage and second-stage bimetal reed contacts to be disconnected with the switch mechanism 2.
Two temperature sensing change-over switches are respectively arranged on the refrigeration pipelines of the motor 53 and the upper/lower batteries (power battery pack 54); the cooling liquid pump 51 pumps the cooling liquid from the cooling liquid container, the cooling liquid flows to the upper battery, the lower battery and the motor 53 through the electric control simulation diverter valve 52, and whether the real-time temperature of the cooling liquid of the motor 53 and the cooling liquid of the battery pack 54 reaches the working temperature threshold of the fan 56 or the refrigerator 57 is detected through the first temperature sensing switch 58 and the second temperature sensing switch 59 which are installed on the motor 53 and the upper battery and the lower battery respectively, so that the start and stop of the electric control three-way valve 55, the fan 56 and the refrigerator 57 are controlled, and the switching of different refrigeration modes is realized.
In some optional embodiments, the temperature sensing mechanism 1 includes a temperature sensing rod 11, a first stage temperature sensing reed 12 and a second stage temperature sensing reed 13, one end of the first stage temperature sensing reed 12 is fixedly connected with the lower part of the temperature sensing rod 11, a first contact point is arranged on the movable end of the first stage temperature sensing reed 12, and the first contact point, the switch mechanism 2 and the circuit connecting part 3 cooperate with each other; the second-stage temperature sensing reed 13 is fixedly connected with the upper part of the temperature sensing rod 11, a second contact point is arranged at the movable end of the second-stage temperature sensing reed 13, and the second contact point, the switch mechanism 2 and the circuit connecting part 3 are matched with each other to work. The temperature threshold of the first-stage temperature sensing reed 12 is lower than the temperature threshold of the second-stage temperature sensing reed 13.
In some optional embodiments, the rebounding mechanism 4 comprises a rebounding fixing rod 41, the rebounding fixing rod 41 is fixedly connected in the control box through threads, a spring 42 is arranged on the rebounding fixing rod 41, and a rebounding fixing cap 43 for limiting is arranged at the top of the rebounding fixing rod 41 to prevent loosening.
It should be noted that, when the temperature rises, the bimetal reed deforms, the reed pushes the rebound fixing rod 41 open, the expansion spring 42 is compressed, the bimetal reed and the switch mechanism 2 are closed, the opening of the corresponding electric control three-way valve 55 is controlled, and the corresponding cooling operation mode is entered. When the temperature is reduced and falls back, the bimetal temperature sensing reed contracts, the reed does not jack the rebound fixing rod 41 any more, the extension spring 42 rebounds, the bimetal reed is disconnected with the switch mechanism 2, the rebound mechanism 4 assists the switch mechanism 2 to control the on-off of a circuit, and the different opening of the electric control three-way valve 55 is controlled.
In some optional embodiments, the circuit connecting portion 3 includes a first signal line 31, a second signal line 32, a third signal line 33, and a fourth signal line 34, the first signal line 31, the second signal line 32, the third signal line 33, and the fourth signal line 34 are all disposed on an outer side wall of the control box in a protruding manner, and the first signal line 31, the second signal line 32, the third signal line 33, and the fourth signal line 34 are respectively connected to the switch mechanism 2.
It should be noted that the connection portion 3 includes a first signal line 31, a second signal line 32, a third signal line 33, and a fourth signal line 34, wherein the first signal line 31, the second signal line 32, the third signal line 33, and the fourth signal line 34 are respectively and fixedly connected to 4 switch connection pads of the switch mechanism 2.
In some optional embodiments, the switch mechanism 2 includes a first connection tab 21 of the first stage temperature switch, a second connection tab 22 of the first stage temperature switch, a first connection tab 23 of the second stage temperature switch, and a second connection tab 24 of the second stage temperature switch, the first connection tab 21 of the first stage temperature switch is fixedly connected to the first signal line 31, the first connection tab 23 of the second stage temperature switch is fixedly connected to the third signal line 33, the second connection tab 22 of the first stage temperature switch is fixedly connected to the second signal line 32, and the second connection tab 24 of the second stage temperature switch is fixedly connected to the fourth signal line 34.
In some alternative embodiments, the temperature threshold of the first stage temperature-sensitive reed 12 is 35 ℃ to 45 ℃, and the temperature threshold of the second stage temperature-sensitive reed 13 is 65 ℃ to 75 ℃.
In summary, the refrigeration pipeline is shared by the motor 53 and the battery pack 54, and due to the difference in the refrigeration capacities required by the motor 53 and the battery pack 54 under different working conditions, the optimal comprehensive refrigeration effect can be achieved by reasonably distributing the refrigeration flow by adjusting the two-way flow distribution ratio of the electrically controlled analog shunt valve 52, and the total amount of the refrigerant flowing in the electrically controlled analog shunt valve 52 is equal to the total amount of the refrigerant flowing out.
Example 2
In the cooling system of the electric vehicle in embodiment 1, this embodiment further provides a temperature control method of the cooling system of the electric vehicle, including the following steps:
detecting the temperature of the cooling fluid around the motor 53 and the power battery pack 54;
when the highest temperature of the refrigerant liquid is detected to reach the preset temperature threshold value of the first-stage temperature sensing reed 12, the first-stage temperature sensing reed 12 expands and contacts with a first connecting sheet 21 of the first-stage temperature switch and a second connecting sheet 22 of the first-stage temperature switch to form a passage;
a path between the first signal line 31 and the second signal line 32 is turned on;
controlling an outlet No. 2 in the electrically-controlled three-way valve 55 to open, collecting and flowing cooling liquid into an outlet No. 1 of the electrically-controlled three-way valve from a cooling liquid pipeline of the motor 53 and a cooling liquid pipeline of the power battery pack 54 respectively, flowing to the fan 56 from the outlet No. 2, and flowing back to the cooling liquid container 50 to realize first-stage cooling;
when the temperature of the refrigerant is detected to be lower than the preset temperature threshold value of the first-stage temperature sensing reed 12, the first-stage temperature sensing reed 12 contracts and is disconnected from the first connecting piece 21 of the first-stage temperature switch and the second connecting piece 22 of the first-stage temperature switch, and a path between the first signal line 31 and the second signal line 32 is disconnected;
and controlling the opening No. 2 in the electric control three-way valve 55 to be closed, opening the opening No. 1, stopping the cooling liquid from flowing through the fan part, collecting the cooling liquid of the refrigerating pipeline of the motor 53 and the cooling liquid of the refrigerating pipeline of the power battery pack 54 after flowing out, flowing into the opening No. 0 of the electric control three-way valve, flowing out from the opening No. 1, stopping the fan 56 from working, and switching to a circulation mode that the cooling liquid sequentially flows through the cooling liquid container 50, the motor 53 and the power battery pack 54.
The temperature switching mechanism is mounted on the refrigeration pipelines of the motor 53 and the upper and lower batteries; the cooling liquid pumped by the cooling liquid pump 51 from the cooling liquid container respectively flows to an upper battery (power battery pack 54), a lower battery (power battery pack 54) and a motor 53 through the electric control simulation diverter valve 52, the temperature switching mechanism respectively detects whether the real-time temperature of the cooling liquid of the motor 53 and the cooling liquid of the battery pack 54 meets the working temperature requirement of a fan 56 or a refrigerator 57, and the electric control simulation diverter valve 52, the electric control three-way valve 55, the fan 56 and the refrigerator 57 are controlled according to the working temperature requirement, so that different refrigeration modes and different diversion ratios are realized.
The embodiment also provides a temperature control method of the cooling system of the electric automobile, which further comprises the following steps:
the temperature of the cooling liquid around the motor 53 and the power battery pack 54 is detected;
when the highest temperature of the refrigerant liquid is detected to reach the preset temperature threshold value of the second-stage temperature sensing reed 13, the second-stage temperature sensing reed 13 expands to jack the rebound mechanism 4, the expansion spring 42 compresses, and a circuit contact point arranged on the second-stage temperature sensing reed 13 is contacted with the first connecting sheet 23 of the second-stage temperature switch and the second connecting sheet 24 of the second-stage temperature switch to form a passage; thereby turning on a path between the third signal line 33 and the fourth signal line 34; opening a port 3 in the electric control three-way valve 55, collecting and flowing cooling liquid into a port 0 of the electric control three-way valve 55 from a cooling liquid pipeline of the motor 53 and a cooling liquid pipeline of the power battery pack 54, flowing out from the port 3, flowing to the refrigerator 57, and flowing back to the cooling liquid container 50 to realize second-stage cooling;
when the highest temperature of the refrigerant liquid is detected to be lower than the preset temperature threshold value of the second-stage temperature sensing reed 13, the second-stage temperature sensing reed 13 contracts, the contact of the rebounding mechanism 4 is disconnected, the expansion spring 42 rebounds to assist in ejecting the contact, the contact of the second-stage temperature sensing reed 13 is disconnected with the first connecting sheet 23 of the second-stage temperature switch and the second connecting sheet 24 of the second-stage temperature switch, and the path between the third signal line 33 and the fourth signal line 34 is disconnected;
and controlling the opening No. 3 in the electric control three-way valve 55 to be closed, and the opening No. 2 to be opened, stopping the cooling liquid from flowing through the cooling liquid container 50, and switching to the first-stage cooling.
In summary, the invention designs a pipeline of an electric vehicle cooling system and a corresponding temperature-sensing control switch mechanism, and by arranging a combination of a temperature-sensing mechanism, a switch mechanism and a circuit connecting part, multi-stage temperature control is realized, so that when the temperature of the cooling liquid around the motor and the upper and lower batteries of the electric vehicle rises, different cooling circulation modes are switched according to different temperatures, and the effective cooling of the cooling liquid around the motor and the upper and lower batteries is realized. Because the refrigerating capacities required by the battery pack and the motor under different working conditions are different, reasonable refrigerating flow distribution can be carried out by adjusting the two-way flow distribution proportion of the electric control simulation shunt valve, the driving safety is improved, and the aim of accurate energy conservation is fulfilled.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The cooling system of the electric automobile is characterized by comprising a refrigerating mechanism, a pump (51), an electric control simulation flow dividing valve (52), a motor (53), a power battery pack (54), an electric control three-way valve (55) and a temperature switching mechanism, wherein the refrigerating mechanism, the pump (51), the electric control simulation flow dividing valve (52), the motor (53), the power battery pack (54) and the electric control three-way valve (55) are sequentially connected through a pipeline according to the material flow direction; an outlet of the electric control simulation diverter valve (52) is connected with an inlet of a refrigerating fluid pipeline of the motor (53), an outlet of the electric control simulation diverter valve (52) is connected with an inlet of a refrigerating fluid pipeline of the power battery pack (54), an outlet of the refrigerating fluid pipeline of the power battery pack (54) and an outlet of the refrigerating fluid pipeline of the motor (53) are gathered and then flow into an electric control three-way valve (55) together, and the temperature switching mechanism is used for detecting the temperatures of the motor (53) and the battery pack (54); the refrigerating mechanism comprises a refrigerating fluid container (50), a fan (56) and a refrigerator (57), wherein an outlet of the refrigerator (57) is connected with an inlet of the fan (56), and an outlet of the fan (56) is connected with an inlet of the refrigerating fluid container (50); the electric control three-way valve (55) comprises three outlets, namely a first outlet, a second outlet and a third outlet, which are respectively connected to inlets of the refrigerant liquid container (50), the fan (56) and the refrigerator (57), and one of the first outlet, the second outlet and the third outlet is opened;
the temperature switching mechanism comprises a temperature sensing mechanism (1), a switch mechanism (2), a circuit connecting part (3) and a rebound mechanism (4), the temperature sensing mechanism (1), the switch mechanism (2) and the circuit connecting part (3) are sequentially connected, and the on-off position of the circuit connecting part (3) is controlled by the switch mechanism (2) and the temperature sensing mechanism (1);
the switch mechanism (2) comprises a first temperature-sensing switch (58) and a second temperature-sensing switch (59), an outlet of the first temperature-sensing switch (58) is respectively communicated with the electric-control simulated diverter valve (52) and the electric-control three-way valve (55) to control the opening and closing states of corresponding valves, an inlet of the first temperature-sensing switch (58) is connected with an outlet of the motor (53), and the first temperature-sensing switch (58) is used for detecting the temperature of cooling liquid of the motor (53); the outlet of the second temperature-sensing switch (59) is respectively communicated with the electric-control simulated diverter valve (52) and the electric-control three-way valve (55) to control the opening and closing states of corresponding valves, the inlet of the second temperature-sensing switch (59) is connected with the power battery pack (54), and the second temperature-sensing switch (59) is used for detecting the temperature of cooling liquid of the power battery pack (54);
the temperature sensing mechanism (1) comprises a temperature sensing rod (11), a first-stage temperature sensing reed (12) and a second-stage temperature sensing reed (13), one end of the first-stage temperature sensing reed (12) is fixedly connected with the lower part of the temperature sensing rod (11), a first contact point is arranged on the movable end of the first-stage temperature sensing reed (12), and the first contact point, the switch mechanism (2) and the circuit connecting part (3) are matched with each other to work; the second-stage temperature sensing reed (13) is fixedly connected with the upper part of the temperature sensing rod (11), a second contact point is arranged at the movable end of the second-stage temperature sensing reed (13), and the second contact point, the switch mechanism (2) and the circuit connecting part (3) are matched with each other to work.
2. The cooling system of an electric vehicle according to claim 1, characterized in that: the temperature threshold value of the first-stage temperature sensing reed (12) is lower than that of the second-stage temperature sensing reed (13).
3. The cooling system of an electric vehicle according to claim 1, characterized in that: rebound mechanism (4) are including resilience dead lever (41), resilience dead lever (41) are through thread fixed connection in the control box, be provided with spring (42) on resilience dead lever (41), the top of resilience dead lever (41) is provided with and is used for spacing resilience locking cap (43).
4. The cooling system of an electric vehicle according to claim 1, characterized in that: the circuit connecting part (3) comprises a first signal line (31), a second signal line (32), a third signal line (33) and a fourth signal line (34), the first signal line (31), the second signal line (32), the third signal line (33) and the fourth signal line (34) are arranged on the outer side wall of the control box in a protruding mode, and the first signal line (31), the second signal line (32), the third signal line (33) and the fourth signal line (34) are respectively connected with the switch mechanism (2).
5. The cooling system of an electric vehicle according to claim 4, characterized in that: the switch mechanism (2) comprises a first connecting piece (21) of a first-stage temperature switch, a second connecting piece (22) of the first-stage temperature switch, a first connecting piece (23) of a second-stage temperature switch and a second connecting piece (24) of the second-stage temperature switch, the first connecting piece (21) of the first-stage temperature switch is fixedly connected with a first signal line (31), the first connecting piece (23) of the second-stage temperature switch is fixedly connected with a third signal line (33), the second connecting piece (22) of the first-stage temperature switch is fixedly connected with a second signal line (32), and the second connecting piece (24) of the second-stage temperature switch is fixedly connected with a fourth signal line (34).
6. A temperature control method for a cooling system of an electric vehicle according to any one of claims 1 to 5, characterized in that: the temperature control method comprises the following steps:
detecting the temperature of the cooling liquid around the motor (53) and the power battery pack (54);
when the detected highest temperature of the refrigerant liquid reaches a preset temperature threshold value of the first-stage temperature sensing reed (12), the first-stage temperature sensing reed (12) expands and contacts with a first connecting sheet (21) of the first-stage temperature switch and a second connecting sheet (22) of the first-stage temperature switch to form a passage;
switching on a path between the first signal line (31) and a second signal line (32);
the sum of the cooling liquid flowing out of the first outlet and the cooling liquid flowing out of the second outlet is equal to the total amount of the cooling liquid flowing out of an inlet in an electrically controlled analog flow dividing valve (52), wherein the flow rates of the first outlet and the second outlet depend on the temperatures of the motor (53) and the battery pack (54), the second outlet in the electrically controlled three-way valve (55) is controlled to be opened, and the cooling liquid respectively passes through the motor (53) and the power battery pack (54), flows to the fan (56) and then flows back to the cooling liquid container (50), so that the first-stage temperature reduction is realized;
when the detected temperature reaches below a preset temperature threshold value of the first-stage temperature sensing reed (12), the first-stage temperature sensing reed (12) contracts and is disconnected with a first connecting piece (21) of the first-stage temperature switch and a second connecting piece (22) of the first-stage temperature switch, and a path between the first signal line (31) and the second signal line (32) is disconnected;
controlling the second outlet of the electrically controlled three-way valve (55) to be closed, the first outlet to be opened, stopping the flow of the cooling liquid through the motor (53) and the power battery pack (54), stopping the operation of the fan (56), and switching to a circulation mode in which the cooling liquid sequentially flows through the cooling liquid container (50), the motor (53) and the power battery pack (54).
7. The method of controlling temperature of a cooling system of an electric vehicle according to claim 6, wherein: the temperature control method further comprises the following steps:
the temperature of cooling liquid around the motor (53) and the power battery pack (54) is detected;
when the detected highest temperature of the refrigerating fluid reaches a preset temperature threshold value of the second-stage temperature sensing reed (13), the second-stage temperature sensing reed (13) expands and contacts with a first connecting sheet (23) of the second-stage temperature switch and a second connecting sheet (24) of the second-stage temperature switch to form a passage;
switching on a path between the third signal line (33) and a fourth signal line (34);
the total amount of the cooling liquid flowing out of the first outlet and the second outlet is equal to the total amount of the cooling liquid flowing out of the inlet of an electrically controlled analog flow dividing valve (52), and the flow rates of the first outlet and the second outlet depend on the temperatures of the motor (53) and the battery pack (54);
controlling a third outlet in the electrically-controlled three-way valve (55) to be opened, enabling cooling liquid to pass through the motor (53) and the power battery pack (54) respectively and flow to the refrigerator (57), and enabling a fan (56) to flow back to the cooling liquid container (50) to achieve secondary cooling;
when the detected temperature reaches below a preset temperature threshold value of the second-stage temperature sensing reed (13), the second-stage temperature sensing reed (13) contracts and is disconnected with a first connecting piece (23) of the second-stage temperature switch and a second connecting piece (24) of the second-stage temperature switch, and a path between the third signal line (33) and a fourth signal line (34) is disconnected;
and controlling the third outlet in the electric control three-way valve (55) to be closed, opening the second outlet, stopping the cooling liquid from flowing through the cooling liquid container (50), and switching to the first-stage cooling.
8. The temperature control method of a cooling system of an electric vehicle according to claim 7, characterized in that: the temperature threshold of the first-stage temperature sensing reed (12) is 35-45 ℃, and the temperature threshold of the second-stage temperature sensing reed (13) is 65-75 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210721745.1A CN115241562B (en) | 2022-06-24 | 2022-06-24 | Cooling system and temperature control method of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210721745.1A CN115241562B (en) | 2022-06-24 | 2022-06-24 | Cooling system and temperature control method of electric automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115241562A CN115241562A (en) | 2022-10-25 |
| CN115241562B true CN115241562B (en) | 2023-03-31 |
Family
ID=83668930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210721745.1A Active CN115241562B (en) | 2022-06-24 | 2022-06-24 | Cooling system and temperature control method of electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115241562B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106985657B (en) * | 2017-03-26 | 2023-04-07 | 安徽安凯汽车股份有限公司 | Battery and motor combined heat management system and heat management method for new energy pure electric bus |
| CN109927534B (en) * | 2019-03-20 | 2023-04-25 | 天津大学 | Thermal management system and control method for hybrid power heavy truck |
| RU2746427C1 (en) * | 2019-12-18 | 2021-04-13 | Федеральное государственное автономное образовательное учреждение высшего образования "Московский политехнический университет" (Московский Политех) | Thermal control method for battery energy storage |
| CN217170413U (en) * | 2021-09-10 | 2022-08-12 | 上海理工大学 | New energy automobile thermal management system |
-
2022
- 2022-06-24 CN CN202210721745.1A patent/CN115241562B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN115241562A (en) | 2022-10-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR0136075B1 (en) | Method and apparatus for subcooling liquid refrigerant circuits | |
| EP0339267B1 (en) | Air conditioning apparatus | |
| CN204786771U (en) | Air conditioner | |
| CN104534732A (en) | Air conditioner | |
| CN104833010A (en) | Outdoor unit of heat recovery VRF air conditioning system and heat recovery VRF air conditioning system | |
| CN103388920B (en) | Refrigerating system and refrigerator provided with same | |
| CN103017392B (en) | Refrigerator refrigerating system and refrigerator with same | |
| CN103900300B (en) | Air-conditioner and control method thereof | |
| CN105042924A (en) | Air conditioner and control method thereof | |
| CN102506557A (en) | Refrigeration equipment and switching unit control method in defrosting process of refrigeration equipment | |
| CN202420014U (en) | Refrigerating system and refrigerator with same | |
| CN201373632Y (en) | Multi-connected air-conditioning system | |
| CN106091192A (en) | Air conditioning system and control method thereof | |
| CN105042738A (en) | Cooling-heating type air conditioning system and cooling air conditioning system | |
| CN115241562B (en) | Cooling system and temperature control method of electric automobile | |
| CN102798261B (en) | Refrigerating system and refrigerating equipment having same | |
| CN108800440B (en) | Air conditioner and control method thereof | |
| CN203083191U (en) | Refrigerator refrigerating system and refrigerator with same | |
| CN218442837U (en) | Air conditioning unit | |
| CN217817534U (en) | Air conditioning unit | |
| CN104422208A (en) | Air conditioning system | |
| CN204329388U (en) | Air-conditioner | |
| CN203501527U (en) | Air conditioning system | |
| CN104748424A (en) | Outdoor unit assembly of multiple on-line system and multiple on-line system with same | |
| CN102353204B (en) | Refrigerator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |