Mine truck dual-system large-cooling-capacity integrated heat pump heat management system

Abstract

According to the mine truck dual-system large-cooling-capacity integrated heat pump heat management system, the air outlet side of a second compressor is connected with a warm core body and a second condenser, the warm core body is connected with a second cell panel heat exchanger, and the second cell panel heat exchanger is connected to the other end of the second compressor through a gas-liquid separator; an outlet of the second condenser is divided into two paths; one path is connected with the gas-liquid separator through the cold core body and is connected to the other end of the second compressor through the gas-liquid separator; the other path is connected with a second cell panel heat exchanger which is connected to the other end of the second compressor through a gas-liquid separator; after being connected in parallel, the first battery panel heat exchanger and the second battery panel heat exchanger are connected in series in a refrigerating and heating pipeline of the power battery, and a liquid PTC (Positive Temperature Coefficient) and a battery water pump are arranged in the refrigerating and heating pipeline of the power battery. The high-efficiency heat dissipation requirement of the new energy mine truck is met, the energy of the whole truck is saved, the operation is more stable, the energy efficiency is higher, and the reliability is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of mine card double-system large-cooling integrated heat pump thermal management systems, mainly applied to pure electric mine card, it can also be extended to pure electric mine card, light truck, sanitation vehicle and engineering machinery vehicle etc. BACKGROUND

[0002] Pure electric mine card belongs to emerging new energy vehicles in recent years, on the basis of pure electric vehicle, combined with traditional mine card product, engine part is replaced by battery drive, since certain temperature range is needed in battery working process, so battery unit needs to be cooled.The battery thermal management part of existing pure electric mine card is generally cooled by liquid to improve the uniformity of temperature inside battery, which needs a refrigeration cycle, i.e.compressor, condenser, expansion valve and evaporator, etc.in working process.The single refrigeration system of prior art does not utilize the waste heat of battery, and is limited by installation space, wiring harness and pipeline layout, cost, etc., which cannot meet the increasing heat dissipation demand of new energy mine card.

[0003] As shown in Figure 1 Existing new energy mine card battery cooling unit cycle diagram, high-temperature and high-pressure refrigerant gas from compressor is cooled by condenser, then throttled by electronic expansion valve and enters plate heat exchanger, low-temperature refrigerant exchanges heat with battery side circulating water in plate heat exchanger, and then refrigerant gas returns to compressor through gas-liquid separator.Low-temperature circulating water exchanged heat in plate exchanger is pumped to battery cold plate by water pump to exchange heat with battery.If cab needs to be cooled, open electronic expansion valve at cold core, and low-temperature refrigerant takes away heat from cab and returns to gas-liquid separator.Cab heating is heated by air-warming PTC, and overall energy consumption is large.

[0004] New energy mine card releases a large amount of heat during battery charging and discharging, and as the amount of electricity and load increases, the heat generated by battery under high load condition is much higher than that of ordinary vehicles, and single refrigeration system cannot meet the high-efficiency heat dissipation demand, and it is also a waste to completely discharge the waste heat generated by battery operation.Therefore, the existing system does not utilize battery waste heat, and single battery refrigeration system has upper limit of refrigeration capacity due to performance limitation of each component, so it cannot meet the high-efficiency heat dissipation demand of new energy mine card. UTILITY MODEL CONTENTS

[0005] The utility model wants to solve the technical problem: in order to meet the new energy mine card bigger and bigger heat dissipation demand and provide the utilization rate of energy, according to the prior art, the integrated system of double refrigeration system and heat pump system is adopted, the refrigerating capacity is improved through the cooperative work of double refrigeration system, and the heating is carried out through the heat pump system using battery waste heat. Therefore, the utility model provides a kind of mine card double system large cold integrated heat pump thermal management system, with the advantages of stable operation, energy saving, high reliability, high energy efficiency, strong refrigerating capacity etc.

[0006] To solve the above problems, the utility model is realized through the following technical schemes:

[0007] A kind of mine card double system large cold integrated heat pump thermal management system, including second compressor, the gas side of second compressor is connected warm core body and second condenser respectively, wherein, warm core body connects second battery plate heat exchanger, second battery plate heat exchanger is connected to the other end of second compressor by gas-liquid separator;

[0008] The outlet of second condenser is divided into two ways: one way is connected gas-liquid separator by cold core body, and is connected to the other end of second compressor by gas-liquid separator;Another way is connected second battery plate heat exchanger, and second battery plate heat exchanger is connected to the other end of second compressor by gas-liquid separator;

[0009] Still include first compressor, first compressor connects first condenser, first condenser connects first battery plate heat exchanger, and first battery plate heat exchanger is connected to the other end of first compressor;

[0010] And the first battery plate heat exchanger and second battery plate heat exchanger are connected in parallel, and are connected in series in the refrigeration and heating pipe line of power battery, and liquid PTC and battery water pump are arranged in the refrigeration and heating pipe line of power battery.

[0011] The gas side of second compressor is connected second condenser by third electromagnetic valve, and is connected warm core body by fourth electromagnetic valve.

[0012] The outlet of second condenser, one way is connected cold core body by check valve and first electromagnetic valve, and another way is connected second battery plate heat exchanger by second electromagnetic valve.

[0013] First condenser is connected first battery plate heat exchanger by thermal expansion valve.

[0014] First compressor and second compressor are variable frequency compressor.

[0015] First exhaust temperature sensor and first high pressure sensor are arranged in the gas side of first compressor;Second exhaust temperature sensor and second high pressure sensor are arranged in the gas side of second compressor;Low pressure sensor is arranged in the back gas side of second compressor.

[0016] The outflow temperature sensor and the backflow temperature sensor are arranged in the refrigeration and heating pipeline of the power battery.

[0017] The cold core is provided with a blower, and the cold core is arranged in the HVAC, and an in-vehicle temperature sensor is arranged in the HVAC.

[0018] The out-pipe first temperature sensor is arranged on the pipeline from the cold core to the gas-liquid separator, and the out-pipe second temperature sensor is arranged on the pipeline from the second battery plate heat exchanger to the gas-liquid separator.

[0019] Compared with the prior art, the utility model has the following beneficial effects: battery double refrigeration system and heat pump system are used to carry out thermal management on the whole vehicle. The main refrigeration system is responsible for cab refrigeration and battery side cooling, and the auxiliary refrigeration system carries out battery side cooling. Through the heat pump system, the waste heat generated on the battery side is supplied to the cab heating, greatly improving the energy utilization rate. The integration of the double refrigeration system and the heat pump system improves the integration degree of the thermal management system, realizes the lightweight of the system, not only meets the high-efficiency heat dissipation demand of the new energy mine truck, but also saves the energy of the whole vehicle, runs more stably, has higher energy efficiency and higher reliability. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the existing new energy mine truck battery cooling unit circulation diagram;

[0021] Figure 2 It is the principle diagram of the double-system large-cooling integrated heat pump thermal management system of the utility model. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0023] In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0024] As Figure 1As shown, a mine truck double system large cold quantity integrated heat pump thermal management system, on the basis of the existing battery cooling system, is changed to a heat pump system, while considering the refrigeration of the cab, the heating of the cab and the refrigeration of the battery; and a set of system is additionally increased for battery refrigeration.

[0025] A mine truck double system large cold quantity integrated heat pump thermal management system, comprising a second compressor 2, the gas outlet side of the second compressor 2 is connected with a warm core body 30 and a second condenser 4 respectively, wherein the warm core body 30 is connected with a second battery plate heat exchanger 6, and the second battery plate heat exchanger 6 is connected to the other end of the second compressor 2 through a gas-liquid separator 7;

[0026] The second compressor 2 is connected with the second condenser 4, and the outlet of the second condenser 4 is divided into two paths: one path is connected with the gas-liquid separator 7 through a cold core body 11 and connected to the other end of the second compressor 2 through the gas-liquid separator 7; the other path is connected with the second battery plate heat exchanger 6, and the second battery plate heat exchanger 6 is connected to the other end of the second compressor 2 through the gas-liquid separator 7;

[0027] The utility model also includes a first compressor 1, the first compressor 1 is connected with a first condenser 3, the first condenser 3 is connected with a first battery plate heat exchanger 5, and the first battery plate heat exchanger 5 is connected to the other end of the first compressor 1;

[0028] And the first battery plate heat exchanger 5 and the second battery plate heat exchanger 6 are connected in parallel and then connected in series in the refrigeration and heating pipeline of the power battery 8, and the liquid PTC 9 and the battery water pump 10 are arranged in the refrigeration and heating pipeline of the power battery 8.

[0029] Further, the gas outlet side of the second compressor 2 is connected with the second condenser 4 through a third electromagnetic valve 32 and connected with the warm core body 30 through a fourth electromagnetic valve 33.

[0030] Further, the outlet of the second condenser 4 is divided into two paths, one path is connected with the cold core body 11 through a check valve 31 and a first electromagnetic valve 12, and the other path is connected with the second battery plate heat exchanger 6 through a second electromagnetic valve 13.

[0031] Further, the first condenser 3 is connected with the first battery plate heat exchanger 5 through a thermal expansion valve 14.

[0032] Further, the first compressor 1 and the second compressor 2 are both variable frequency compressors. Better, a first exhaust temperature sensor 15 and a first high pressure sensor 16 are arranged on the gas outlet side of the first compressor 1; a second exhaust temperature sensor 17 and a second high pressure sensor 18 are arranged on the gas outlet side of the second compressor 2; and a low pressure sensor 20 is arranged on the gas inlet side of the second compressor 2.

[0033] Further, the water outlet temperature sensor 21 and the water return temperature sensor 22 are arranged in the refrigeration and heating pipeline of the power battery 8.

[0034] Further, the cold core 11 is arranged with a blower 23, and the cold core 11 is arranged in the HVAC, and the in-vehicle temperature sensor is arranged in the HVAC.

[0035] Further, the first pipe outlet temperature sensor 24 is arranged on the pipeline from the cold core 11 to the gas-liquid separator 7, and the second pipe outlet temperature sensor 25 is arranged on the pipeline from the second battery plate heat exchanger 6 to the gas-liquid separator 7.

[0036] The working principle of the utility model is as follows:

[0037] The high-temperature and high-pressure refrigerant gas from the first compressor 1 is cooled by the first condenser 3 (forcedly radiated to the environment by the condensation radiator fan), and then enters the first battery plate heat exchanger 5 after throttling by the thermal expansion valve 14, and the low-temperature refrigerant exchanges heat with the circulating water in the battery cold plate in the first battery plate heat exchanger 5, and then the refrigerant gas returns to the first compressor 1 through the gas-liquid separator 7. In the high-load working condition, the second set of refrigeration system is started to assist the battery heat dissipation. The operation principles of the two sets of refrigeration systems are the same.

[0038] When the cab has heating demand, the fourth electromagnetic valve 33 is opened, and the high-temperature and high-pressure refrigerant gas from the second compressor 2 is discharged into the warm air core 30, and the refrigerant gas directly returns to the battery plate heat exchanger for the next cycle after discharging heat to the cab. The two low-temperature circulating waters that exchange heat in the battery plate heat exchanger are combined and sent to the power battery 8 by the battery water pump to exchange heat with the power battery 8.

[0039] The control of each component is as follows: the rotation speeds of the two compressors are adjusted by the heat management system demand and are synchronously controlled in combination with the high-pressure pressure sensor.

[0040] The two sets of refrigeration systems use two compressors for pressurization, and when the battery side and the motor refrigeration demand are normal, a single set of refrigeration system is started to dissipate heat; when the battery side load is high, the double refrigeration system is started to dissipate heat. The refrigeration capacity of the double refrigeration system fully meets the high heat dissipation demand of the new energy mine truck in the high-load operation. When the cab has heating demand, the heating pump system is started to heat the cab by the battery waste heat.

[0041] The liquid-heat PTC 9 is arranged at the power battery, and when there is heating demand in winter, defrosting demand or defogging in the transition season, the system heating function can be started to meet the corresponding demand.

[0042] The above merely is preferred implementation manner of the present application, it should be pointed out, for the person skilled in the art, without departing from the overall concept of the present application, can make several changes and improvements, these should also be considered as the protection scope of the present application.

Claims

1. A mine truck dual system large cold load integrated heat pump thermal management system, characterized in that: The second compressor (2) is connected with the warm core (30) and the second condenser (4) respectively, wherein the warm core (30) is connected with the second battery plate heat exchanger (6), and the second battery plate heat exchanger (6) is connected to the other end of the second compressor (2) through the gas-liquid separator (7); The outlet of the second condenser (4) is divided into two paths: one path is connected with the gas-liquid separator (7) through the cold core (11) and connected to the other end of the second compressor (2) through the gas-liquid separator (7); the other path is connected with the second battery plate heat exchanger (6), and the second battery plate heat exchanger (6) is connected to the other end of the second compressor (2) through the gas-liquid separator (7); The first compressor (1) is connected with the first condenser (3), the first condenser (3) is connected with the first battery plate heat exchanger (5), and the first battery plate heat exchanger (5) is connected to the other end of the first compressor (1); The first battery plate heat exchanger (5) and the second battery plate heat exchanger (6) are connected in parallel and then connected in series in the refrigeration and heating pipeline of the power battery (8), and the liquid PTC (9) and the battery water pump (10) are arranged in the refrigeration and heating pipeline of the power battery (8).

2. The mine truck dual-system large cold load integrated heat pump thermal management system according to claim 1, characterized in that: The outlet of the second condenser (4) is connected with the cold core (11) through the one-way valve (31) and the first electromagnetic valve (12), and connected with the second battery plate heat exchanger (6) through the second electromagnetic valve (13).

3. The mine truck dual-system large cold load integrated heat pump thermal management system according to claim 1, characterized in that: The first condenser (3) is connected with the first battery plate heat exchanger (5) through the thermal expansion valve (14).

4. The mine truck dual-system large cold load integrated heat pump thermal management system according to claim 1, characterized in that: The first compressor (1) and the second compressor (2) are variable frequency compressors.

5. The mine truck dual-system large cold load integrated heat pump thermal management system according to claim 1, characterized in that: The first exhaust temperature sensor (15) and the first high pressure sensor (16) are arranged on the gas outlet side of the first compressor (1); the second exhaust temperature sensor (17) and the second high pressure sensor (18) are arranged on the gas outlet side of the second compressor (2); and the low pressure sensor (20) is arranged on the gas inlet side of the second compressor (2).

6. The mine truck dual-system large cold load integrated heat pump thermal management system according to claim 1, characterized in that: The water outlet temperature sensor (21) and the water return temperature sensor (22) are arranged in the refrigeration and heating pipeline of the power battery (8).

7. The mine truck dual-system large cold load integrated heat pump thermal management system according to claim 1, characterized in that: The cold core (11) is provided with the air blower (23), and the cold core (11) is arranged in the HVAC, and the indoor temperature sensor is arranged in the HVAC.

8. The mine truck dual-system large cold load integrated heat pump thermal management system according to claim 1, characterized in that: The outlet pipe first temperature sensor (24) is arranged on the pipeline from the cold core (11) to the gas-liquid separator (7), and the outlet pipe second temperature sensor (25) is arranged on the pipeline from the second battery plate heat exchanger (6) to the gas-liquid separator (7).

9. The mine truck dual-system large cold load integrated heat pump thermal management system according to claim 1, characterized in that: ​

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