Automobile circulating water supplementing system and control method

Abstract

The invention relates to an automobile thermal management system, in particular to an automobile circulating water supplementing system and a control method. The expansion kettle (1) is respectively connected with a battery heat management cooling system, an air conditioner heating circulating system and a motor electric control circulating system; the expansion kettle is connected with the battery heat management cooling system, the air conditioner heating circulation system and the motor electric control circulation system. The water replenishing requirement of each system loop of the whole vehicle can be met only by using one expansion kettle; the use number of the expansion kettles is effectively reduced, the arrangement space in a vehicle is saved, and the forecabin arrangement is simpler and more attractive; and meanwhile, the cost of parts is reduced.

Description

Technical Field

[0001] The invention relates to an automobile thermal management system, and in particular to an automobile circulating water replenishing system and a control method. Background Art

[0002] Currently, most automotive thermal management systems include multiple circulating water replenishment circuits, such as the battery thermal management cooling and water replenishment system circuit, the air conditioning and heating circulation circuit, and the motor electronic control circulation circuit; multiple expansion kettles need to be arranged to meet the water replenishment needs of different system circuits; the large number of expansion kettles occupies a large space in the vehicle, which is not conducive to the layout of other structures; and at the same time increases the cost of components.

[0003] After searching, the applicant found that the Chinese patent document with publication number 212148301U disclosed a vehicle air-conditioning heat circulation system and a vehicle air-conditioning system on December 15, 2020, including a refrigerant circulation pipeline and a water circulation pipeline. The refrigerant circulation pipeline includes a compressor, a condenser and an outdoor heat exchanger connected in sequence, and the condenser is connected to the water circulation pipeline. The refrigerant circulation pipeline also includes a plate heat exchanger; the first fluid channel of the plate heat exchanger is connected to the outdoor heat exchanger and the compressor, and the second fluid channel of the plate heat exchanger is connected to the automobile motor cooling pipeline; this device also cannot solve the above-mentioned technical problems.

[0004] Therefore, in order to improve or solve at least one of the above problems, it is necessary to provide an automobile circulating water replenishment system and control method that can simultaneously realize the circulating water replenishment of the battery thermal management cooling and water replenishment system loop, the air conditioning heating circulation loop and the motor electronic control circulation loop, and can reduce the number of expansion kettles used. Summary of the invention

[0005] The object of the present invention is to provide an automobile circulating water replenishment system and control method which can simultaneously realize circulating water replenishment of a battery thermal management cooling system loop, an air conditioning heating circulation loop and a motor electronic control circulation loop, and can reduce the number of expansion kettles used.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: an automobile circulating water replenishment system, including an expansion kettle; the expansion kettle is respectively connected to a battery thermal management cooling system, an air conditioning heating circulation system and a motor electronic control circulation system.

[0007] The battery thermal management and cooling system includes a battery water pump; the battery water pump is connected to a chiller; the chiller is connected to a battery; the battery is connected to the battery water pump; the expansion kettle includes a first water supply pipe; the first water supply pipe is connected to the battery water pump.

[0008] The battery thermal management and cooling system includes a compressor; the compressor is connected to a WCC; the WCC is connected to a condenser; the condenser is connected to a first electronic expansion valve; the first electronic expansion valve is connected to the Chiller; the Chiller is connected to a gas-liquid separator; the gas-liquid separator is connected to the compressor.

[0009] The condenser is connected to a second electronic expansion valve; the second electronic expansion valve is connected to an evaporator; and the evaporator is connected to the gas-liquid separator.

[0010] The air conditioning and heating circulation system includes a warm air water pump; the warm air water pump is connected to a warm core; the warm core is connected to the WCC; the WCC is connected to a WPTC; the WPTC is connected to the warm air water pump; the expansion kettle includes a second water supply pipe; the second water supply pipe is connected to the warm air water pump.

[0011] The motor electronically controlled circulation system includes a motor water pump; the motor water pump is connected to an electrically driven radiator; the electrically driven radiator is connected to a motor assembly; the motor assembly is connected to the motor water pump; the expansion kettle includes a third water supply pipe; the third water supply pipe is connected to the motor water pump.

[0012] A control method for the automobile circulating water replenishment system, the control method comprising the following steps:

[0013] 1) The expansion kettle supplies water to the battery water pump through the first water supply pipe; the battery water pump inputs the coolant into the chiller; the coolant in the chiller flows into the battery; the coolant in the battery flows into the battery water pump;

[0014] 2) The expansion kettle supplies water to the heater water pump through the second water supply pipe; the coolant in the heater water pump flows into the heater core; the coolant in the heater core flows into the WCC; the coolant in the WCC flows into the WPTC; the coolant in the WPTC flows into the heater water pump;

[0015] 3) The expansion kettle supplies water to the motor water pump through the third water supply pipe; the coolant in the motor water pump flows into the electric drive radiator; the coolant in the electric drive radiator flows into the motor assembly; the coolant in the motor assembly flows into the motor water pump.

[0016] The step 1) comprises:

[0017] 11) The compressor outputs high-temperature and high-pressure gas refrigerant; the high-temperature and high-pressure gas refrigerant passes through the WCC and the condenser in sequence; the condenser outputs low-temperature and low-pressure liquid refrigerant; the low-temperature and low-pressure liquid refrigerant passes through the first electronic expansion valve; the low-temperature and low-pressure liquid refrigerant in the first electronic expansion valve flows into the Chiller; the low-temperature and low-pressure liquid refrigerant in the Chiller flows into the gas-liquid separator; the low-temperature and low-pressure liquid refrigerant in the gas-liquid separator flows into the compressor.

[0018] The step 1) comprises:

[0019] 12) The compressor outputs high-temperature and high-pressure gas refrigerant; the high-temperature and high-pressure gas refrigerant passes through the WCC and the condenser in sequence; the condenser outputs low-temperature and low-pressure liquid refrigerant; the low-temperature and low-pressure liquid refrigerant passes through the second electronic expansion valve; the low-temperature and low-pressure liquid refrigerant in the second electronic expansion valve flows into the evaporator; the low-temperature and low-pressure liquid refrigerant in the evaporator flows into the gas-liquid separator; the low-temperature and low-pressure liquid refrigerant in the gas-liquid separator flows into the compressor.

[0020] The beneficial effects of this application are:

[0021] The expansion kettle of the present application is connected to the battery thermal management cooling system, the air conditioning heating circulation system and the motor electronic control circulation system through the first water supply pipe, the second water supply pipe and the third water supply pipe respectively; only one expansion kettle is needed to meet the water replenishment needs of various system circuits of the whole vehicle; the number of expansion kettles used is effectively reduced, the interior layout space is saved, the front cabin layout is more concise and beautiful; and the cost of components is reduced at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein:

[0023] Figure 1 This is the connection diagram of the automobile circulating water supply system.

[0024] Figure 2 This is a connection diagram of the battery thermal management and cooling system of the automotive circulating water replenishment system.

[0025] Figure 3 This is a connection diagram of the air conditioning and heating circulation system of this automobile circulating water replenishment system.

[0026] Figure 4 This is a connection diagram of the motor electronic control circulation system of the automobile circulating water replenishment system.

[0027] The marks in the above figure are:

[0028] The markings in the figure are:

[0029] 1. Expansion kettle,

[0030] 2. Battery water pump, 201. Chiller, 202. Battery, 203. First water supply pipe,

[0031] 3. Compressor, 301. WCC, 302. Condenser, 303. Evaporator, 304. First electronic expansion valve, 305. Second electronic expansion valve, 306. Gas-liquid separator,

[0032] 4. Heater water pump, 401, heater core, 402, WPTC, 403, second water supply pipe,

[0033] 5. Motor water pump, 501. Electric drive radiator, 502. Motor assembly, 503. Third water supply pipe. DETAILED DESCRIPTION

[0034] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0035] Figure 1 The automobile circulating water replenishing system shown includes an expansion kettle 1; the expansion kettle 1 is respectively connected to a battery thermal management cooling system, an air conditioning heating circulation system and a motor electronic control circulation system.

[0036] The expansion kettle 1 is respectively connected to the battery thermal management cooling system, the air conditioning heating circulation system and the motor electronic control circulation system; only one expansion kettle 1 is needed to meet the water replenishment demand of each system circuit of the whole vehicle; the number of expansion kettles 1 used is effectively reduced, the layout space in the vehicle is saved, and the front cabin layout is more concise and beautiful; at the same time, the cost of parts is reduced.

[0037] The battery thermal management cooling system includes a battery water pump 2; the battery water pump 2 is connected to Chiller 201; Chiller 201 is connected to a battery 202; the battery 202 is connected to the battery water pump 2; the expansion kettle 1 includes a first water supply pipe 203; the first water supply pipe 203 is connected to the battery water pump 2.

[0038] Chiller 201 absorbs heat and discharges it through circulating refrigerant, thereby achieving a cooling effect; the battery water pump 2 pumps coolant into Chiller 201, and the coolant and refrigerant exchange heat and cool down; the low-temperature coolant flows into the battery 202 to cool the battery 202; the expansion kettle 1 supplies water to the battery water pump 2 through the first water supply pipe 203, so that the coolant can be replenished for the battery thermal management cooling system circuit in real time to ensure the normal operation of the battery thermal management cooling system.

[0039] The battery thermal management cooling system includes a compressor 3; the compressor 3 is connected to WCC301; the WCC301 is connected to a condenser 302; the condenser 302 is connected to a first electronic expansion valve 304; the first electronic expansion valve 304 is connected to Chiller201; the Chiller201 is connected to a gas-liquid separator 306; the gas-liquid separator 306 is connected to the compressor 3.

[0040] WCC (Water Flow Control Center) 301, WCC301 changes the flow of chilled water or hot water by adjusting the speed of the water pump or the opening of the valve, so as to adjust the heat exchange efficiency in the air-conditioning system; the compressor 3 produces a high-temperature and high-pressure gas refrigerant; the high-temperature and high-pressure gas refrigerant can be converted into a low-temperature and low-pressure liquid refrigerant after passing through WCC301 and the condenser 302 in turn; after the low-temperature and low-pressure liquid refrigerant enters Chiller201, it can exchange heat with the coolant entering Chiller201 to cool the coolant.

[0041] The condenser 302 is connected to the second electronic expansion valve 305 ; the second electronic expansion valve 305 is connected to the evaporator 303 ; the evaporator 303 is connected to the gas-liquid separator 306 .

[0042] The condenser 302 outputs a low-temperature, low-pressure liquid refrigerant; the low-temperature, low-pressure liquid refrigerant enters the evaporator 303 through the second electronic expansion valve 305, and can cool the passenger compartment.

[0043] The air conditioning heating circulation system includes a warm air water pump 4; the warm air water pump 4 is connected to a warm core 401; the warm core 401 is connected to WCC301; WCC301 is connected to WPTC402; WPTC402 is connected to the warm air water pump 4; the expansion kettle 1 includes a second water supply pipe 403; the second water supply pipe 403 is connected to the warm air water pump 4.

[0044] WPTC (Water PTC Heater) converts electrical energy into thermal energy by controlling the coolant flowing through the thermistor element, thereby heating the coolant; when the coolant flows through the thermistor heater, the thermistor element generates heat due to the passage of current, and transfers the heat to the coolant; WCC301 outputs low-temperature coolant; the low-temperature coolant flows into WPTC402 for heating; WPTC402 outputs high-temperature coolant, which passes through the heater core 401 to heat the passenger compartment through the heater pump 4; the expansion kettle 1 supplies water to the heater pump 4 through the second water supply pipe 403, thereby replenishing the coolant for the air conditioning and heating circulation system loop in real time to ensure the normal operation of the air conditioning and heating circulation system.

[0045] The motor electronically controlled circulation system includes a motor water pump 5; the motor water pump 5 is connected to an electrically driven radiator 501; the electrically driven radiator 501 is connected to a motor assembly 502; the motor assembly 502 is connected to the motor water pump 5; the expansion kettle 1 includes a third water supply pipe 503; the third water supply pipe 503 is connected to the motor water pump 5.

[0046] The motor water pump 5 pumps the coolant to the electrically driven radiator 501; the electrically driven radiator 501 can cool the coolant; the low-temperature coolant flows into the motor assembly 502, and can dissipate the heat of the motor assembly 502; the expansion kettle 1 supplies water to the motor water pump 5 through the third water supply pipe 503, so that the coolant can be replenished for the motor electronic control circulation system loop in real time to ensure the normal operation of the motor electronic control circulation system.

[0047] A control method for an automobile circulating water replenishment system, the control method comprising the following steps:

[0048] 1) The expansion kettle 1 supplies water to the battery water pump 2 through the first water supply pipe 203; the battery water pump 2 inputs the coolant into the Chiller 201; the coolant in the Chiller 201 flows into the battery 202; the coolant in the battery 202 flows into the battery water pump 2;

[0049] 2) The expansion kettle 1 supplies water to the heater water pump 4 through the second water supply pipe 403; the coolant in the heater water pump 4 flows into the heater core 401; the coolant in the heater core 401 flows into the WCC 301; the coolant in the WCC 301 flows into the WPTC 402; the coolant in the WPTC 402 flows into the heater water pump 4;

[0050] 3) The expansion kettle 1 supplies water to the motor water pump 5 through the third water supply pipe 503; the coolant in the motor water pump 5 flows into the electric drive radiator 501; the coolant in the electric drive radiator 501 flows into the motor assembly 502; the coolant in the motor assembly 502 flows into the motor water pump 5.

[0051] In step 1), the expansion kettle 1 supplies water to the battery water pump 2 through the first water supply pipe 203, so that the coolant can be replenished for the battery thermal management cooling system loop in real time; in step 2), the expansion kettle 1 supplies water to the heater water pump 4 through the second water supply pipe 403, so that the coolant can be replenished for the air conditioning heating circulation system loop in real time; in step 3), the expansion kettle 1 supplies water to the motor water pump 5 through the third water supply pipe 503, so that the coolant can be replenished for the motor electronic control circulation system loop in real time.

[0052] Step 1) includes:

[0053] 11) Compressor 3 outputs high-temperature and high-pressure gas refrigerant; the high-temperature and high-pressure gas refrigerant passes through WCC301 and condenser 302 in sequence; condenser 302 outputs low-temperature and low-pressure liquid refrigerant; the low-temperature and low-pressure liquid refrigerant passes through the first electronic expansion valve 304; the low-temperature and low-pressure liquid refrigerant in the first electronic expansion valve 304 flows into Chiller201; the low-temperature and low-pressure liquid refrigerant in Chiller201 flows into the gas-liquid separator 306; the low-temperature and low-pressure liquid refrigerant in the gas-liquid separator 306 flows into compressor 3.

[0054] Step 1) includes:

[0055] 12) Compressor 3 outputs high-temperature and high-pressure gas refrigerant; the high-temperature and high-pressure gas refrigerant passes through WCC301 and condenser 302 in sequence; condenser 302 outputs low-temperature and low-pressure liquid refrigerant; the low-temperature and low-pressure liquid refrigerant passes through the second electronic expansion valve 305; the low-temperature and low-pressure liquid refrigerant in the second electronic expansion valve 305 flows into the evaporator 303; the low-temperature and low-pressure liquid refrigerant in the evaporator 303 flows into the gas-liquid separator 306; the low-temperature and low-pressure liquid refrigerant in the gas-liquid separator 306 flows into compressor 3.

[0056] After the low-temperature and low-pressure liquid refrigerant enters Chiller 201, it can exchange heat with the coolant entering Chiller 201 to cool the coolant; the low-temperature and low-pressure liquid refrigerant enters the evaporator 303 through the second electronic expansion valve 305, and can cool the passenger compartment.

[0057] The specific workflow of the present invention is as follows:

[0058] 1) The expansion kettle 1 supplies water to the battery water pump 2 through the first water supply pipe 203; the battery water pump 2 inputs the coolant into the Chiller 201; the coolant in the Chiller 201 flows into the battery 202; the coolant in the battery 202 flows into the battery water pump 2;

[0059] 2) The expansion kettle 1 supplies water to the heater water pump 4 through the second water supply pipe 403; the coolant in the heater water pump 4 flows into the heater core 401; the coolant in the heater core 401 flows into the WCC 301; the coolant in the WCC 301 flows into the WPTC 402; the coolant in the WPTC 402 flows into the heater water pump 4;

[0060] 3) The expansion kettle 1 supplies water to the motor water pump 5 through the third water supply pipe 503; the coolant in the motor water pump 5 flows into the electric drive radiator 501; the coolant in the electric drive radiator 501 flows into the motor assembly 502; the coolant in the motor assembly 502 flows into the motor water pump 5.

[0061] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An automobile circulating water replenishment system, characterized in that: It comprises an expansion kettle (1); the expansion kettle (1) is respectively connected to a battery thermal management cooling system, an air conditioning heating circulation system and a motor electronic control circulation system.

2. The automobile circulating water replenishing system according to claim 1, characterized in that: The battery thermal management and cooling system comprises a battery water pump (2); the battery water pump (2) is connected to a chiller (201); the chiller (201) is connected to a battery (202); the battery (202) is connected to the battery water pump (2); the expansion kettle (1) comprises a first water supply pipe (203); the first water supply pipe (203) is connected to the battery water pump (2).

3. The automobile circulating water replenishing system according to claim 2, characterized in that: The battery thermal management and cooling system comprises a compressor (3); the compressor (3) is connected to a WCC (301); the WCC (301) is connected to a condenser (302); the condenser (302) is connected to a first electronic expansion valve (304); the first electronic expansion valve (304) is connected to the chiller (201); the chiller (201) is connected to a gas-liquid separator (306); and the gas-liquid separator (306) is connected to the compressor (3).

4. The automobile circulating water replenishing system according to claim 3, characterized in that: The condenser (302) is connected to a second electronic expansion valve (305); the second electronic expansion valve (305) is connected to an evaporator (303); and the evaporator (303) is connected to the gas-liquid separator (306).

5. An automobile circulating water replenishing system according to any one of claims 3-4, characterized in that: The air conditioning and heating circulation system comprises a warm air water pump (4); the warm air water pump (4) is connected to a warm core (401); the warm core (401) is connected to the WCC (301); the WCC (301) is connected to a WPTC (402); the WPTC (402) is connected to the warm air water pump (4); the expansion kettle (1) comprises a second water supply pipe (403); the second water supply pipe (403) is connected to the warm air water pump (4).

6. The automobile circulating water replenishing system according to claim 5, characterized in that: The motor-controlled circulation system comprises a motor water pump (5); the motor water pump (5) is connected to an electrically driven radiator (501); the electrically driven radiator (501) is connected to a motor assembly (502); the motor assembly (502) is connected to the motor water pump (5); the expansion kettle (1) comprises a third water supply pipe (503); the third water supply pipe (503) is connected to the motor water pump (5).

7. A control method for the automobile circulating water replenishment system according to any one of claims 1 to 6, characterized in that: The control method comprises the following steps: 1) The expansion kettle (1) supplies water to the battery water pump (2) through the first water supply pipe (203); the battery water pump (2) inputs the cooling liquid into the chiller (201); the cooling liquid in the chiller (201) flows into the battery (202); the cooling liquid in the battery (202) flows into the battery water pump (2); 2) the expansion kettle (1) supplies water to the heater water pump (4) through the second water supply pipe (403); the coolant in the heater water pump (4) flows into the heater core (401); the coolant in the heater core (401) flows into the WCC (301); the coolant in the WCC (301) flows into the WPTC (402); the coolant in the WPTC (402) flows into the heater water pump (4); 3) The expansion kettle (1) supplies water to the motor water pump (5) through the third water supply pipe (503); the coolant in the motor water pump (5) flows into the electric drive radiator (501); the coolant in the electric drive radiator (501) flows into the motor assembly (502); and the coolant in the motor assembly (502) flows into the motor water pump (5).

8. The control method according to claim 7, characterized in that: The step 1) comprises: 11) The compressor (3) outputs high-temperature and high-pressure gas refrigerant; the high-temperature and high-pressure gas refrigerant passes through the WCC (301) and the condenser (302) in sequence; the condenser (302) outputs low-temperature and low-pressure liquid refrigerant; the low-temperature and low-pressure liquid refrigerant passes through the first electronic expansion valve (304); the low-temperature and low-pressure liquid refrigerant in the first electronic expansion valve (304) flows into the Chiller (201); the low-temperature and low-pressure liquid refrigerant in the Chiller (201) flows into the gas-liquid separator (306); the low-temperature and low-pressure liquid refrigerant in the gas-liquid separator (306) flows into the compressor (3).

9. The control method according to claim 8, characterized in that: The step 1) comprises: 12) The compressor (3) outputs high-temperature and high-pressure gas refrigerant; the high-temperature and high-pressure gas refrigerant passes through the WCC (301) and the condenser (302) in sequence; the condenser (302) outputs low-temperature and low-pressure liquid refrigerant; the low-temperature and low-pressure liquid refrigerant passes through the second electronic expansion valve (305); the low-temperature and low-pressure liquid refrigerant in the second electronic expansion valve (305) flows into the evaporator (303); the low-temperature and low-pressure liquid refrigerant in the evaporator (303) flows into the gas-liquid separator (306); the low-temperature and low-pressure liquid refrigerant in the gas-liquid separator (306) flows into the compressor (3).

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