A hybrid power system cooling and heating device
By designing multi-circuit heating devices in hybrid systems and using engine and generator heating systems, the problems of range and engine cold start performance of new energy vehicles under low temperature conditions are solved, and more efficient battery temperature management and cab are achieved Heating.
Patent Information
- Application Number
- CN202010301783.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-04-16
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2040-04-16
AI Technical Summary
The range of new energy vehicles has decreased under low temperature conditions, and the engine has poor low-temperature cold start performance, which affects the vehicle's use effect.
A hybrid system cooling and heating device is designed, including multiple circuits and water pump systems, which can warm up the engine by starting the engine under low temperature conditions, and use generator power to heat the PTC to quickly increase the temperature, ensuring that the power battery and engine achieve proper operation. Temperature, improve low-temperature cold start performance, while providing heating to the cab if necessary.
It effectively improves the range under low temperature conditions, reduces the self-discharge damage of the power battery, improves the low-temperature cold start performance of the engine, and saves power at low temperatures.
Smart Images
Figure CN111546866B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of hybrid electric vehicles, and in particular relates to a hybrid power system cooling and heating device. Background Art
[0002] In recent years, the country's emission requirements for automobile companies have become increasingly stringent, and the public's environmental awareness and low-carbon consumption concepts have been increasingly strengthened, and new energy vehicle technology has also developed rapidly. However, due to the discharge characteristics of the battery, its self-discharge capacity will be greatly reduced at low temperatures. New energy vehicles already face the problem of insufficient cruising range, and the decline in low-temperature discharge capacity makes the already insufficient cruising range even more stretched. Even electric vehicles that use hybrid systems to increase cruising range still face the problem of reduced cruising range under low temperature conditions.
[0003] To this end, we propose a hybrid power system cooling and heating device to solve the problems existing in the prior art, improve the cruising range under low temperature conditions, and improve the low temperature cold start performance of the engine to a certain extent. Summary of the invention
[0004] The object of the present invention is to provide a hybrid power system cooling and heating device to solve the problem of reduced cruising range under low temperature conditions in the prior art mentioned in the above background technology.
[0005] To achieve the above object, the present invention adopts the following technical solutions:
[0006] A hybrid power system cooling and heating device comprises a first circuit, a second circuit, a third circuit, a fourth circuit and an auxiliary water tank, wherein the first circuit comprises a generator, one side of the generator is connected to a driving motor via a pipeline, one side of the driving motor is connected to a first radiator via a pipeline, one side of the first radiator is connected to a second water pump via a pipeline, a water outlet of the second water pump is connected to a motor controller via a pipeline, and one side of the motor controller is fixedly connected to the generator via a pipeline;
[0007] The second circuit includes a power battery, one side of the power battery is connected to a second radiator through a pipeline, one end of the second radiator is connected to a first water pump through a pipeline, and a water outlet end of the first water pump is connected to the power battery through a pipeline;
[0008] The third circuit includes an engine, the engine adopts an electronic thermostat, one side of the engine is connected to a third radiator through a pipeline, one end of the third radiator is connected to a fourth water pump through a pipeline, and the water outlet of the fourth water pump is connected to the engine through a pipeline;
[0009] The fourth circuit includes an engine, one side of the engine is connected to the PTC through a pipeline, one side of the PTC is connected to a second reversing valve through a pipeline, a second outlet of the second reversing valve is connected to one side of the power battery through a pipeline, one side of the power battery is connected to a cab heater through a pipeline, one side of the cab heater is connected to a first reversing valve through a pipeline, a second outlet of the first reversing valve is connected to the engine through a pipeline, a first outlet of the second reversing valve is connected to the cab heater through a pipeline, a first outlet of the first reversing valve is connected to a third water pump through an aisle, and one end of a water outlet of the third water pump is connected to the PTC through a pipeline;
[0010] The water outlet of the auxiliary water tank is connected to the first circuit through a one-way valve, the water outlet of the auxiliary water tank is connected to the second circuit through a one-way valve, the water outlet of the auxiliary water tank is connected to the third circuit through a one-way valve, and the water outlet of the auxiliary water tank is connected to the fourth circuit through a one-way valve;
[0011] The pipeline of the first circuit is connected to a throttle valve through a one-way valve, the pipeline of the second circuit is connected to a throttle valve through a one-way valve, the pipeline of the third circuit is connected to a throttle valve through a one-way valve, one end of the throttle valve is connected to the water inlet of the auxiliary water tank through a pipeline, and the pipeline of the fourth circuit is connected to the water inlet of the auxiliary water tank through a one-way valve.
[0012] Preferably, when the vehicle needs to be cooled under high temperature conditions, the engine is located in the high-temperature circuit, the generator, motor controller, power battery and drive motor are located in the low-temperature circuit, the engine drives the fourth water pump, and at the same time starts the first water pump and the second water pump to cool each circuit respectively.
[0013] Preferably, if the cab needs to be heated, the first reversing valve is adjusted to the second outlet position, the second reversing valve is adjusted to the first outlet position, the electronic thermostat of the engine is turned on, and the cab heater is turned on to heat the cab.
[0014] Preferably, under low temperature conditions, when the power battery needs to be heated, the engine is started first to warm up and heat the circuit, then the first reversing valve is adjusted to the first outlet position, the second reversing valve is adjusted to the second outlet position, the third water pump is turned on, and the generator supplies power to the PTC to heat the fourth circuit, and the fourth circuit heats the power battery to avoid low-temperature discharge of the power battery.
[0015] Preferably, if the cab needs to be heated, the cab heater is turned on and the fourth circuit is used to heat the cab.
[0016] Preferably, when the vehicle is running under low temperature conditions and the power battery is at an appropriate temperature but has insufficient power, the first reversing valve is adjusted to the second outlet position, the second reversing valve is adjusted to the first outlet position, and the electronic thermostat of the engine is turned on, so that the engine and the power battery are in the same circuit. At this time, the circuit can be quickly heated up through power battery self-discharge and PTC heating, thereby improving the engine's low-temperature cold start performance; if the cab needs heating, the cab heater is turned on and the cab is heated using this circuit.
[0017] Preferably, when the temperature of the engine is high after normal startup, the first reversing valve and the second reversing valve can be adjusted to select one of the engine, power battery and PTC as the heating source, or the power battery and PTC can be used together as the heating source.
[0018] Preferably, when the vehicle is running under low temperature conditions and the power battery temperature is suitable and the power is sufficient, the power battery maintains the temperature through self-discharge heating; if the cab needs heating, the first reversing valve is adjusted to the first outlet position, the second reversing valve is adjusted to the second outlet position, and the third water pump is turned on to provide heating during driving. If necessary, the PTC is turned on to heat the circuit. At this time, the position selected by the second reversing valve can be adjusted according to the circuit temperature.
[0019] Technical effects and advantages of the present invention: Compared with the prior art, the hybrid power system cooling and heating device proposed by the present invention has the following advantages:
[0020] 1. Under high temperature conditions, each subsystem is cooled in its own cooling circuit. Under low temperature conditions, the engine is started first when the vehicle is started. After the warm-up is completed, the reversing valve is adjusted, and the generator is used to power the PTC to heat the fourth circuit so that the circuit is quickly heated. When the circuit temperature is suitable, the reversing valve is adjusted again, and the PTC is used to heat the circuit to heat the power battery, so that the power battery is quickly heated to a suitable operating temperature; when the power battery temperature is suitable but needs to be charged, the circuit is first heated by self-discharge or powering the PTC, and then the engine is started to improve the engine's low-temperature cold start performance;
[0021] 2. At low temperatures, the power battery heats itself to a suitable operating temperature by self-discharging or powering the PTC, which greatly saves the power battery and eliminates the damage to the battery caused by low-temperature discharge. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a structural schematic diagram of the present invention;
[0023] Figure 2 is a schematic structural diagram of the first circuit of the present invention;
[0024] Figure 3is a schematic structural diagram of the second circuit of the present invention;
[0025] Figure 4 is a schematic structural diagram of the third circuit of the present invention;
[0026] Figure 5 It is a schematic structural diagram of the fourth circuit of the present invention.
[0027] In the figure: 1. first circuit; 2. second circuit; 3. third circuit; 4. fourth circuit; 5. auxiliary water tank; 101. generator; 102. drive motor; 103. first radiator; 104. second water pump; 105. motor controller; 201. power battery; 202. second radiator; 203. first water pump; 301. engine; 302. third radiator; 303. fourth water pump; 401. PTC; 402. second reversing valve; 403. cab heater; 404. first reversing valve; 405. third water pump; 6. throttle valve. DETAILED DESCRIPTION
[0028] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0029] The present invention provides Figure 1-5 A hybrid power system cooling and heating device shown includes a first circuit 1, a second circuit 2, a third circuit 3, a fourth circuit 4 and an auxiliary water tank 5. The first circuit 1 includes a generator 101. One side of the generator 101 is connected to a drive motor 102 through a pipeline. One side of the drive motor 102 is connected to a first radiator 103 through a pipeline. One side of the first radiator 103 is connected to a second water pump 104 through a pipeline. The water outlet of the second water pump 104 is connected to a motor controller 105 through a pipeline. One side of the motor controller 105 is fixedly connected to the generator 101 through a pipeline.
[0030] The second circuit 2 includes a power battery 201, one side of the power battery 201 is connected to a second radiator 202 through a pipeline, one end of the second radiator 202 is connected to a first water pump 203 through a pipeline, and the water outlet of the first water pump 203 is connected to the power battery 201 through a pipeline;
[0031] The third circuit 3 includes an engine 301, the engine 301 uses an electronic thermostat, one side of the engine 301 is connected to a third radiator 302 through a pipeline, one end of the third radiator 302 is connected to a fourth water pump 303 through a pipeline, and the water outlet of the fourth water pump 303 is connected to the engine 301 through a pipeline;
[0032] The fourth circuit 4 includes an engine 301, one side of the engine 301 is connected to a PTC 401 through a pipeline, the PTC 401 is a heater, one side of the PTC 401 is connected to a second reversing valve 402 through a pipeline, the second outlet of the second reversing valve 402 is connected to one side of the power battery 201 through a pipeline, one side of the power battery 201 is connected to a cab heater 403 through a pipeline, one side of the cab heater 403 is connected to a first reversing valve 404 through a pipeline, the second outlet of the first reversing valve 404 is connected to the engine 301 through a pipeline, the first outlet of the second reversing valve 402 is connected to the cab heater 403 through a pipeline, the first outlet of the first reversing valve 404 is connected to a third water pump 405 through an aisle, and one end of the water outlet of the third water pump 405 is connected to the PTC 401 through a pipeline;
[0033] The water outlet of the auxiliary water tank 5 is connected to the first circuit 1 through a one-way valve, the water outlet of the auxiliary water tank 5 is connected to the second circuit 2 through a one-way valve, the water outlet of the auxiliary water tank 5 is connected to the third circuit 3 through a one-way valve, and the water outlet of the auxiliary water tank 5 is connected to the fourth circuit 4 through a one-way valve;
[0034] The pipeline of the first circuit 1 is connected to the throttle valve 6 through a one-way valve, the pipeline of the second circuit 2 is connected to the throttle valve 6 through a one-way valve, the pipeline of the third circuit 3 is connected to the throttle valve 6 through a one-way valve, one end of the throttle valve 6 is connected to the water inlet of the auxiliary water tank 5 through a pipeline, and the pipeline of the fourth circuit 4 is connected to the water inlet of the auxiliary water tank 5 through a one-way valve.
[0035] When the vehicle needs to be cooled under high temperature conditions, the engine 301 is located in the high-temperature circuit, the generator 101, the motor controller 105, the power battery 201 and the drive motor 102 are located in the low-temperature circuit, and the engine 301 drives the fourth water pump 303, and at the same time starts the first water pump 203 and the second water pump 104 to cool each circuit respectively.
[0036] If the cab needs to be heated, the first reversing valve 404 is adjusted to the second outlet position, the second reversing valve 402 is adjusted to the first outlet position, the electronic thermostat of the engine 301 is turned on, and the cab heater 403 is turned on to heat the cab.
[0037] Under low temperature conditions, when the power battery 201 needs to be heated, the engine 301 is first started to warm up and heat the circuit, then the first reversing valve 404 is adjusted to the first outlet position, the second reversing valve 402 is adjusted to the second outlet position, the third water pump 405 is turned on, and the generator 101 supplies power to the PTC401 to heat the fourth circuit 4, and the fourth circuit 4 heats the power battery 201 to avoid low-temperature discharge of the power battery 201.
[0038] If the cab needs to be heated, the cab heater 403 is turned on and the fourth circuit 4 is used to heat the cab.
[0039] When the vehicle is running under low temperature conditions and the power battery 201 is at a suitable temperature but has insufficient power, the first reversing valve 404 is adjusted to the second outlet position, the second reversing valve 402 is adjusted to the first outlet position, and the electronic thermostat of the engine 301 is turned on, so that the engine 301 and the power battery 201 are in the same circuit. At this time, the circuit can be quickly heated up through the self-discharge of the power battery 201 and the heating of the PTC401, thereby improving the low-temperature cold start performance of the engine 301; if the cab needs heating, the cab heater 403 is turned on, and the cab is heated using this circuit.
[0040] When the temperature of the engine 301 is high after normal startup, the first reversing valve 404 and the second reversing valve 402 can be adjusted to select one of the engine 301, the power battery 201 and the PTC 401 as the heating source, or the power battery 201 and the PTC 401 can be used together as the heating source.
[0041] When the vehicle is running under low temperature conditions and the power battery 201 is at an appropriate temperature and has sufficient power, the power battery 201 maintains its temperature through self-discharge heating; if the cab needs heating, the first reversing valve 404 is adjusted to the first outlet position, the second reversing valve 402 is adjusted to the second outlet position, and the third water pump 405 is turned on to provide heating during driving. If necessary, the PTC 401 is turned on to heat the circuit. At this time, the position selected by the second reversing valve 402 can be adjusted according to the circuit temperature.
[0042] Working principle: Under low temperature conditions, when the vehicle is started, the engine 301 is started first. After the warm-up is completed, the reversing valve is adjusted, and the generator 101 is used to power the PTC401, and the fourth circuit 4 is heated to quickly heat the circuit. When the circuit temperature is suitable, the reversing valve is adjusted again, and the circuit is heated by PTC401 to heat the power battery 201, so that the power battery 201 is quickly heated to a suitable working temperature; when the temperature of the power battery 201 is suitable but needs to be charged, the circuit is first heated by self-discharge or powering the PTC401, and then the engine 301 is started to improve the low-temperature cold start performance of the engine 301; at low temperatures, the power battery 201 heats itself to a suitable working temperature by self-discharge or powering the PTC401, which greatly saves the power of the power battery 201 and eliminates the damage to the power battery 201 caused by low-temperature discharge.
[0043] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A hybrid power system cooling and heating device, comprising a first circuit (1), a second circuit (2), a third circuit (3), a fourth circuit (4) and an auxiliary water tank (5), characterized in that: The first circuit (1) comprises a generator (101), one side of the generator (101) is connected to a drive motor (102) via a pipeline, one side of the drive motor (102) is connected to a first radiator (103) via a pipeline, one side of the first radiator (103) is connected to a second water pump (104) via a pipeline, a water outlet of the second water pump (104) is connected to a motor controller (105) via a pipeline, and one side of the motor controller (105) is fixedly connected to the generator (101) via a pipeline; The second circuit (2) comprises a power battery (201), one side of the power battery (201) is connected to a second radiator (202) via a pipeline, one end of the second radiator (202) is connected to a first water pump (203) via a pipeline, and a water outlet end of the first water pump (203) is connected to the power battery (201) via a pipeline; The third circuit (3) comprises an engine (301), the engine (301) adopts an electronic thermostat, one side of the engine (301) is connected to a third radiator (302) via a pipeline, one end of the third radiator (302) is connected to a fourth water pump (303) via a pipeline, and a water outlet end of the fourth water pump (303) is connected to the engine (301) via a pipeline; The fourth circuit (4) comprises an engine (301), one side of the engine (301) is connected to a PTC (401) via a pipeline, one side of the PTC (401) is connected to a second reversing valve (402) via a pipeline, a second outlet of the second reversing valve (402) is connected to one side of a power battery (201) via a pipeline, one side of the power battery (201) is connected to a cab heater (403) via a pipeline, one side of the cab heater (403) is connected to a first reversing valve (404) via a pipeline, a second outlet of the first reversing valve (404) is connected to the engine (301) via a pipeline, a first outlet of the second reversing valve (402) is connected to the cab heater (403) via a pipeline, a first outlet of the first reversing valve (404) is connected to a third water pump (405) via a passage, and one end of a water outlet of the third water pump (405) is connected to the PTC (401) via a pipeline; The water outlet of the auxiliary water tank (5) is connected to the first circuit (1) through a one-way valve, the water outlet of the auxiliary water tank (5) is connected to the second circuit (2) through a one-way valve, the water outlet of the auxiliary water tank (5) is connected to the third circuit (3) through a one-way valve, and the water outlet of the auxiliary water tank (5) is connected to the fourth circuit (4) through a one-way valve; The pipeline of the first circuit (1) is connected to a throttle valve (6) via a one-way valve, the pipeline of the second circuit (2) is connected to a throttle valve (6) via a one-way valve, the pipeline of the third circuit (3) is connected to a throttle valve (6) via a one-way valve, one end of the throttle valve (6) is connected to the water inlet of the auxiliary water tank (5) via a pipeline, and the pipeline of the fourth circuit (4) is connected to the water inlet of the auxiliary water tank (5) via a one-way valve; When the vehicle needs to be cooled under high temperature conditions, the engine (301) is located in the high temperature circuit, the generator (101), the motor controller (105), the power battery (201) and the drive motor (102) are located in the low temperature circuit, the engine (301) drives the fourth water pump (303), and at the same time starts the first water pump (203) and the second water pump (104) to cool each circuit respectively; under low temperature conditions, when the power battery (201) needs to be heated, the engine (301) is first started to warm up and heat the circuit, then the first reversing valve (404) is adjusted to the first outlet position, the second reversing valve (402) is adjusted to the second outlet position, the third water pump (405) is started, the generator (101) supplies power to the PTC (401) to heat the fourth circuit (4), and the fourth circuit (4) provides heat for the power battery (201) to avoid low temperature discharge of the power battery (201); when the vehicle is running under low temperature conditions and the power battery (201) is at a suitable temperature but insufficient in power, the first reversing valve (404) is turned on. 04) is adjusted to the second outlet position, the second reversing valve (402) is adjusted to the first outlet position, the electronic thermostat of the engine (301) is turned on, so that the engine (301) and the power battery (201) are in the same circuit. At this time, the circuit can be quickly heated up through the self-discharge of the power battery (201) and the heating of the PTC (401), thereby improving the low-temperature cold start performance of the engine (301); if the cab needs to be heated, the cab heater (403) is turned on, and the cab is heated using this circuit; when the vehicle When the vehicle is running under low temperature conditions and the power battery (201) has a suitable temperature and sufficient power, the power battery (201) maintains the temperature by self-discharging and heating; if the cab needs to be heated, the first reversing valve (404) is adjusted to the first outlet position, the second reversing valve (402) is adjusted to the second outlet position, the third water pump (405) is turned on to provide heating during driving, and if necessary, the PTC (401) is turned on to heat the circuit, and at this time, the selected position of the second reversing valve (402) can be adjusted according to the circuit temperature.
2. A hybrid power system cooling and heating device according to claim 1, characterized in that: If the cab needs to be heated, the first reversing valve (404) is adjusted to the second outlet position, the second reversing valve (402) is adjusted to the first outlet position, the electronic thermostat of the engine (301) is turned on, and the cab heater (403) is turned on to heat the cab.
3. A hybrid power system cooling and heating device according to claim 1, characterized in that: If the cab needs to be heated, the cab heater (403) is turned on, and the fourth circuit (4) is used to heat the cab.
4. A hybrid power system cooling and heating device according to claim 1, characterized in that: When the temperature of the engine (301) is high after normal startup, the first reversing valve (404) and the second reversing valve (402) can be adjusted to select one of the engine (301), the power battery (201) and the PTC (401) as a heating source, or the power battery (201) and the PTC (401) as a heating source.