Battery constant temperature system

Abstract

The utility model discloses a battery constant-temperature system which comprises a compressor, a high-efficiency condenser, an expansion valve, a plate heat exchanger, a water pump and a PTC (Positive Temperature Coefficient) heater, after refrigerants are added, the compressor converts sucked low-temperature and low-pressure gaseous refrigerants into high-temperature and high-pressure gaseous refrigerants and discharges the high-temperature and high-pressure gaseous refrigerants to an inlet of the condenser; refrigerant in the condenser is cooled through a fan on the condenser, so that medium-temperature and high-pressure liquid refrigerant is discharged from an outlet of the condenser, then the medium-temperature and high-pressure liquid refrigerant is converted into low-temperature and low-pressure gaseous refrigerant through an expansion valve, cold energy is converted to a cooling liquid circulating side of the battery pack through heat exchange of a plate heat exchanger, and after the cooling liquid is added into the battery pack, the battery pack is cooled. The water pump is started to circulate the cooling liquid, the high-temperature cooling liquid is conveyed to the plate heat exchanger to exchange heat with the refrigerant to reduce the temperature of the cooling liquid, then the cooling liquid is conveyed to the battery pack, refrigeration circulation is achieved, heating system circulation is achieved through the PTC heater, meanwhile, the high-efficiency condenser is adopted to accelerate the condensation efficiency, and the overall operation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery heat dissipation, in particular to a battery constant temperature system. Background Art

[0002] Due to the increasingly serious energy crisis and environmental pollution, the direction of automobile development has changed from full fuel to electric form, and with the strong promotion of the country, electric vehicles have developed rapidly. However, the thermal management of lithium batteries used in electric vehicles restricts its development. Lithium batteries will generate a lot of heat during the charging and discharging process, which will cause the temperature of lithium batteries to rise, making them unable to work normally, reducing their service life, and even causing explosions. Therefore, rapid heat dissipation of lithium batteries is currently urgently needed. At the same time, when the temperature is too low, they cannot be used normally. There are many compressor refrigeration systems on the market to solve this heat dissipation problem, but they do not solve the problem of the low ambient temperature of lithium batteries. At the same time, the efficiency of the condenser used is relatively low. Therefore, it is necessary to propose a battery constant temperature system that can both cool and heat and has a high-efficiency condenser. Utility Model Content

[0003] The purpose of the utility model is to solve the problems in the background technology and provide a battery constant temperature system.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] A battery constant temperature system includes a compressor, a high-efficiency condenser, an expansion valve, a plate heat exchanger, a water pump, and a PTC heater. The exhaust port of the compressor is connected to the inlet of the high-efficiency condenser, the outlet of the high-efficiency condenser is connected to the inlet of the expansion valve, the outlet of the expansion valve is connected to the cold medium inlet of the plate heat exchanger, the inlet of the compressor is connected to the cold medium outlet of the plate heat exchanger, the outlet of the water pump is connected to the hot medium inlet of the plate heat exchanger, and the PTC heater is arranged between the water pump and the plate heat exchanger.

[0006] After the utility model adds the refrigerant, the compressor is started, and the compressor converts the sucked low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant and discharges it to the inlet of the condenser, and cools the refrigerant inside the condenser through the fan on the condenser, so that the medium-temperature and high-pressure liquid refrigerant is discharged from the outlet of the condenser, and then the medium-temperature and high-pressure liquid refrigerant is converted into low-temperature and low-pressure gaseous refrigerant through the expansion valve, and the cold capacity is converted to the coolant circulation side of the battery pack through the heat exchange of the plate exchanger. After the coolant is added to the battery pack, the water pump is turned on to circulate the coolant, and the high-temperature coolant is transported to the plate exchanger for heat exchange with the refrigerant to reduce the temperature of the coolant and then sent to the battery pack to realize the refrigeration cycle. After the coolant is added to the battery pack, the water pump is turned on to circulate the coolant, and the low-temperature coolant is transported to the PTC heater, which is heated and then sent to the battery pack to realize the circulation of the heating system and the effect of keeping the battery at a constant temperature. At the same time, a high-efficiency condenser is used to accelerate the condensation efficiency and improve the overall operating efficiency.

[0007] The cooling and heating systems do not operate at the same time.

[0008] Preferably, the high-efficiency condenser includes a heat dissipation component and a fan arranged behind the heat dissipation component, the heat dissipation component includes a vertically placed air inlet pipe and a water outlet pipe, a plurality of parallel inclined heat dissipation pipes are fixedly connected between the air inlet pipe and the water outlet pipe, the end of the inclined heat dissipation pipe fixed to the air inlet pipe is higher than the end fixed to the water outlet pipe, the inclined heat dissipation pipe is respectively connected to the air inlet pipe and the water outlet pipe, a heat dissipation belt mechanism is fixedly connected between two adjacent inclined heat dissipation pipes, an air inlet is provided on the upper end side wall of the air inlet pipe, a water outlet is provided below the water outlet pipe, and the bottoms of the air inlet pipe and the water outlet pipe are both inclined in design.

[0009] The utility model allows high-temperature and high-pressure gaseous refrigerant to enter a vertically placed air inlet pipe through an air inlet, and then disperses the gaseous refrigerant into each inclined heat dissipation pipe. The heat dissipation belt mechanism absorbs heat, and at the same time, the fan works to absorb the temperature on the heat dissipation belt mechanism. The cooled gas becomes medium-temperature and high-pressure liquid refrigerant and flows out from the water outlet. It passes through a plurality of parallel inclined heat dissipation pipes and works simultaneously to reduce the cooling time. The design of the inclined pipe reduces the phenomenon of gas-liquid mixing, discharges the liquid first, increases the liquid outflow, and improves the cooling efficiency.

[0010] Preferably, the heat dissipation belt mechanism includes a wavy heat dissipation belt and a straight heat dissipation belt, the crest of the wavy heat dissipation belt is fixedly connected to the top wall of the inclined heat dissipation tube, the trough of the wavy heat dissipation belt is fixedly connected to the bottom wall of the inclined heat dissipation tube, and the two straight heat dissipation belts are arranged between the crest and the trough of the wavy heat dissipation belt and are parallel to each other.

[0011] The utility model absorbs heat from the inclined heat dissipation pipe through the wave-shaped heat dissipation belt, and the absorbed heat is further absorbed through the straight heat dissipation belt, thereby increasing the heat dissipation area and further improving the cooling efficiency.

[0012] Preferably, two groups of heat dissipation components are arranged from front to back, the air inlets of the two heat dissipation components are connected to the main air inlet pipe, the water outlets of the two heat dissipation components are connected to the main water outlet pipe, and the wavy heat dissipation belts on the two heat dissipation components are staggered, that is, the crests correspond to the troughs.

[0013] Preferably, through the design of two groups of heat dissipation components and the staggered arrangement of the wavy heat dissipation belts on the two heat dissipation components, the wind flow passes through the first wavy heat dissipation belt and then passes through the second wavy heat dissipation belt. Due to the staggered arrangement of the wavy heat dissipation belts, the wind flow is dispersed when passing through the second wavy heat dissipation belt, so that the wind temperature passes through the second heat dissipation belt evenly, thereby increasing the wind temperature and improving the cooling efficiency.

[0014] Preferably, high-temperature and high-pressure resistant pipes are used between the compressor, the high-efficiency condenser, the expansion valve, and the plate heat exchanger; the high-temperature and high-pressure resistant pipe located at the exhaust port of the compressor is provided with an exhaust temperature sensor structure which does not need to be inserted into the high-temperature and high-pressure resistant pipe; the temperature coming out of the compressor can be detected by the temperature sensor to protect the temperature coming out of the compressor from exceeding the temperature; when it is too high, the speed is reduced or the compressor is shut down to extend the service life; the exhaust temperature sensor structure includes a columnar temperature sensor, a thermally conductive seat, and fasteners; the thermally conductive seat is arranged on the side wall of the high-temperature and high-pressure resistant pipe, the columnar temperature sensor is arranged above the thermally conductive seat, and the fasteners fix the columnar temperature sensor, the thermally conductive seat, and the high-temperature and high-pressure resistant pipe.

[0015] The utility model arranges a columnar temperature sensor on a heat-conducting seat, which is then fixed by a fastener, and then the temperature is transmitted to the columnar temperature sensor through the heat-conducting seat. Then the temperature sensor measures the temperature to ensure the accuracy of the measured temperature. Under the premise of not damaging the pipeline, the temperature can be accurately measured, and the problem of insufficient sealing performance that easily leads to refrigerant leakage when the temperature sensor is inserted into the pipeline to obtain the temperature in the traditional way can be solved.

[0016] Preferably, a concave placement groove is formed on the top of the thermal conductive seat, and an upwardly raised limiting groove is formed on the bottom of the thermal conductive seat. The placement groove fits tightly with the side wall of the columnar temperature sensor, and the limiting groove fits tightly with the side wall of the high-temperature and high-pressure resistant pipeline, so that the thermal conductive seat fits tightly with both the pipeline and the columnar temperature sensor, thereby accelerating heat conduction.

[0017] Preferably, the fastener includes a band, a screw, and a socket, the socket is provided with a screw mounting cavity, the screw is rotatably installed in the screw mounting cavity, the band is provided with a plurality of slots that mesh with the screw, one end of the screw is provided with a threaded hole, and the other end is conical, the pipe, the columnar temperature sensor and the thermal conductive seat are wrapped by the band, and then the columnar temperature sensor is fixed to the pipe by the meshing of the screw and the slot, and will not loosen. Beneficial Effects

[0018] 1. After the refrigerant is added to the utility model, the compressor is started, and the compressor converts the sucked low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant and discharges it to the inlet of the condenser, and the refrigerant inside the condenser is cooled by the fan on the condenser, so that the medium-temperature and high-pressure liquid refrigerant is discharged from the outlet of the condenser, and then the medium-temperature and high-pressure liquid refrigerant is converted into low-temperature and low-pressure gaseous refrigerant through the expansion valve, and the cold capacity is converted to the coolant circulation side of the battery pack through the heat exchange of the plate exchanger. After the coolant is added to the battery pack, the water pump is turned on to circulate the coolant, and the high-temperature coolant is transported to the plate exchanger for heat exchange with the refrigerant to reduce the temperature of the coolant and then sent to the battery pack to realize the refrigeration cycle. After the coolant is added to the battery pack, the water pump is turned on to circulate the coolant, and the low-temperature coolant is transported to the PTC heater, which is heated and then sent to the battery pack to realize the circulation of the heating system and the effect of keeping the battery at a constant temperature. At the same time, a high-efficiency condenser is used to accelerate the condensation efficiency and improve the overall operating efficiency.

[0019] 2. The utility model allows high-temperature and high-pressure gaseous refrigerant to enter a vertically placed air inlet pipe through an air inlet, and then disperses the gaseous refrigerant into each inclined heat dissipation tube. The heat dissipation belt mechanism absorbs heat, and at the same time, the fan works to absorb the temperature on the heat dissipation belt mechanism. The cooled gas becomes medium-temperature and high-pressure liquid refrigerant and flows out from the water outlet. It passes through a number of parallel inclined heat dissipation tubes and works simultaneously to reduce the cooling time. Through the design of the inclined tube, the phenomenon of gas-liquid mixing is reduced, liquid is discharged first, the liquid outflow is increased, and the cooling efficiency is improved.

[0020] 3. The utility model arranges a columnar temperature sensor on a heat-conducting seat, and then fixes it with fasteners. Then, the temperature is transmitted to the columnar temperature sensor through the heat-conducting seat, and then the temperature sensor measures the temperature to ensure the accuracy of the measured temperature. Without damaging the pipeline, the temperature can be accurately measured, and the problem of insufficient sealing performance that easily leads to refrigerant leakage when the temperature sensor is inserted into the pipeline to obtain the temperature in the traditional way can be solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the constant temperature system of the utility model;

[0022] Figure 2It is a schematic diagram of the heat dissipation component of the utility model;

[0023] Figure 3 It is a top view schematic diagram of the high-efficiency condenser of the utility model;

[0024] Figure 4 A schematic diagram of the back side of the high-efficiency condenser of the utility model;

[0025] Figure 5 It is a schematic diagram of the heat dissipation belt mechanism at the front of the utility model;

[0026] Figure 6 It is a schematic diagram of the heat dissipation belt mechanism at the rear of the utility model;

[0027] Figure 7 A schematic diagram of the direction of the heat dissipation belt mechanism of the utility model after absorbing heat;

[0028] Figure 8 A schematic diagram of the exhaust temperature sensor structure and the pipeline connection of the utility model;

[0029] Fig. 9 A schematic diagram of the fastener of the utility model;

[0030] Fig.10 A schematic diagram of the screw of the utility model;

[0031] Fig.11 A schematic diagram of a card holder of the utility model. DETAILED DESCRIPTION

[0032] The following specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0033] The present invention will be described in detail below with reference to the accompanying drawings. Example

[0034] like Figure 1 As shown, a battery constant temperature system includes a compressor 2, a high-efficiency condenser 3, an expansion valve 4, a plate heat exchanger 5, a water pump 6, and a PTC heater 7. The exhaust port of the compressor 2 is connected to the inlet of the high-efficiency condenser 3, the outlet of the high-efficiency condenser 3 is connected to the inlet of the expansion valve 4, the outlet of the expansion valve 4 is connected to the cold medium inlet of the plate heat exchanger 5, the inlet of the compressor 2 is connected to the cold medium outlet of the plate heat exchanger 5, the outlet of the water pump 6 is connected to the hot medium inlet of the plate heat exchanger 5, and the PTC heater 7 is arranged between the water pump 6 and the plate heat exchanger 5.

[0035] like Figure 2-7 As shown, the high-efficiency condenser 3 includes a heat dissipation component 36 and a fan 35 arranged behind the heat dissipation component. The heat dissipation component 36 includes an air inlet pipe 31 and a water outlet pipe 32 placed vertically. A plurality of parallel inclined heat dissipation pipes 33 are fixedly connected between the air inlet pipe 31 and the water outlet pipe 32. The end of the inclined heat dissipation pipe 33 fixed to the air inlet pipe 31 is higher than the end fixed to the water outlet pipe 32. The inclined heat dissipation pipe 33 is respectively connected to the air inlet pipe 31 and the water outlet pipe 32. A heat dissipation belt mechanism 34 is fixedly connected between two adjacent inclined heat dissipation pipes 33. An air inlet 310 is provided on the upper end side wall of the air inlet pipe 31, and a water outlet 320 is provided below the water outlet pipe 32. The heat dissipation belt mechanism 34 includes a wavy heat dissipation belt 341 and a straight heat dissipation belt 342. The crest of the wavy heat dissipation belt 341 is fixedly connected to the top wall of the inclined heat dissipation tube 33, and the trough of the wavy heat dissipation belt 341 is fixedly connected to the bottom wall of the inclined heat dissipation tube 33. The two straight heat dissipation belts 342 are arranged between the crest and the trough of the wavy heat dissipation belt 341 and are parallel to each other. Two groups of heat dissipation components 36 are arranged in the direction from front to back. The air inlets of the two heat dissipation components 36 are connected to the total air inlet pipe 361, and the water outlets of the two heat dissipation components 36 are connected to the total water outlet pipe 362. The wavy heat dissipation belts 341 on the two heat dissipation components 36 are staggered, that is, the crests correspond to the troughs.

[0036] like Figure 8-11 As shown, a high temperature and high pressure resistant pipeline is used between the compressor 2, the high efficiency condenser 3, the expansion valve 4, and the plate heat exchanger 5. An exhaust temperature sensor structure 8 is provided on the high temperature and high pressure resistant pipeline located at the exhaust port of the compressor 2. The exhaust temperature sensor structure 8 includes a columnar temperature sensor 81, a heat conductive seat 82, and a fastener 83. The heat conductive seat 82 is arranged on the side wall of the high temperature and high pressure resistant pipeline 9. The columnar temperature sensor 81 is arranged above the heat conductive seat 82. The fastener 83 fixes the columnar temperature sensor 81, the heat conductive seat 82 and the high temperature and high pressure resistant pipeline 9. The heat conductive seat 82 is formed above the columnar temperature sensor 81. There is a concave placement groove 821, and the bottom of the heat conductive seat 82 is shaped with an upward limiting groove 822, the placement groove 821 is tightly fitted with the side wall of the columnar temperature sensor 81, and the limiting groove 822 is tightly fitted with the side wall of the high temperature and high pressure resistant pipeline 9, the fastener 83 includes a hoop 831, a screw 832, and a holder 833, and the holder 833 is provided with a screw installation cavity 834, and the screw 832 can be rotatably installed in the screw installation cavity 834, and the hoop 831 is provided with a plurality of slots 835 that mesh with the screw 832, and one end of the screw 832 is provided with a threaded hole, and the other end is conical.

[0037] Working principle: Figure 1-11As shown, during cooling, the compressor 2 is started, and the compressor 2 converts the sucked low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant and discharges it to the inlet of the condenser 3, and the high-temperature and high-pressure gaseous refrigerant enters the vertically placed inlet pipe 31 through the air inlet 310, and then the gaseous refrigerant is dispersed into each inclined heat dissipation tube 33, and the wavy heat dissipation belt 341 of the heat dissipation belt mechanism 34 absorbs heat from the inclined heat dissipation tube 33, and the absorbed heat is further absorbed by the straight heat dissipation belt 342, thereby increasing the heat dissipation area and further improving the cooling efficiency. At the same time, the fan 35 works to absorb the temperature on the heat dissipation belt mechanism 34, and the cooled gas The refrigerant is converted into medium-temperature and high-pressure liquid refrigerant and flows out from the water outlet to achieve efficient cooling. The medium-temperature and high-pressure liquid refrigerant is then converted into low-temperature and low-pressure gaseous refrigerant through the expansion valve 4. The cold capacity is converted to the coolant circulation side of the battery pack through the heat exchange of the plate exchanger 5. After the coolant is added to the battery pack, the water pump 6 is turned on to circulate the coolant, and the high-temperature coolant is transported to the plate exchanger for heat exchange with the refrigerant to reduce the coolant temperature before being sent to the battery pack; during heating: the water pump is started, the heating control is carried out according to the set temperature, and the PTC heating is turned on; after the coolant is added to the battery pack, the water pump 6 is turned on to circulate the coolant, and the low-temperature coolant is transported to the PTC heater 7 for heating before being sent to the battery pack.

[0038] During the refrigeration process, the exhaust temperature sensor detects the exhaust temperature. If the exhaust temperature is ≥80℃, an alarm will be triggered, and if it is ≤75℃, the speed will be restored. The speed will be reduced after the alarm, and it will be restored to full speed after a delay of 30s after recovery, thereby protecting the compressor and extending the service life of the compressor.

Claims

1. A battery constant temperature system, It is characterized in that The invention comprises a compressor (2), a high-efficiency condenser (3), an expansion valve (4), a plate heat exchanger (5), a water pump (6), and a PTC heater (7). The exhaust port of the compressor (2) is connected to the inlet of the high-efficiency condenser (3), the outlet of the high-efficiency condenser (3) is connected to the inlet of the expansion valve (4), the outlet of the expansion valve (4) is connected to the cold medium inlet of the plate heat exchanger (5), the inlet of the compressor (2) is connected to the cold medium outlet of the plate heat exchanger (5), the outlet of the water pump (6) is connected to the hot medium inlet of the plate heat exchanger (5), and the PTC heater (7) is arranged between the water pump (6) and the plate heat exchanger (5).

2. A battery constant temperature system according to claim 1, It is characterized in that The high-efficiency condenser (3) comprises a heat dissipation component (36) and a fan (35) arranged behind the heat dissipation component. The heat dissipation component (36) comprises an air inlet pipe (31) and a water outlet pipe (32) placed vertically. A plurality of parallel inclined heat dissipation pipes (33) are fixedly connected between the air inlet pipe (31) and the water outlet pipe (32). One end of the inclined heat dissipation pipe (33) fixed to the air inlet pipe (31) is higher than one end fixed to the water outlet pipe (32). The inclined heat dissipation pipe (33) is respectively connected to the air inlet pipe (31) and the water outlet pipe (32). A heat dissipation belt mechanism (34) is fixedly connected between two adjacent inclined heat dissipation pipes (33). An air inlet (310) is provided on the upper side wall of the air inlet pipe (31), and a water outlet (320) is provided below the water outlet pipe (32).

3. A battery constant temperature system according to claim 2, It is characterized in that The heat dissipation belt mechanism (34) comprises a wavy heat dissipation belt (341) and a straight heat dissipation belt (342); the crest of the wavy heat dissipation belt (341) is fixedly connected to the top wall of the inclined heat dissipation tube (33); the trough of the wavy heat dissipation belt (341) is fixedly connected to the bottom wall of the inclined heat dissipation tube (33); and the two straight heat dissipation belts (342) are arranged between the crest and the trough of the wavy heat dissipation belt (341) and are parallel to each other.

4. A battery constant temperature system according to claim 3, It is characterized in that Two groups of the heat dissipation components (36) are arranged in a direction from front to back, the air inlets of the two heat dissipation components (36) are connected to a total air inlet pipe (361), the water outlets of the two heat dissipation components (36) are connected to a total water outlet pipe (362), and the wavy heat dissipation belts (341) on the two heat dissipation components (36) are arranged in a staggered manner, that is, the wave crests correspond to the wave troughs.

5. A battery constant temperature system according to claim 4, It is characterized in that A high temperature and high pressure resistant pipe (9) is used between the compressor (2), the high efficiency condenser (3), the expansion valve (4), and the plate heat exchanger (5). An exhaust temperature sensor structure (8) that does not need to be inserted into the high temperature and high pressure resistant pipe (9) is provided on the high temperature and high pressure resistant pipe (9) located at the exhaust port of the compressor (2). The exhaust temperature sensor structure (8) comprises a columnar temperature sensor (81), a heat conductive seat (82), and a fastener (83). The heat conductive seat (82) is arranged on the side wall of the high temperature and high pressure resistant pipe (9), the columnar temperature sensor (81) is arranged above the heat conductive seat (82), and the fastener (83) fixes the columnar temperature sensor (81), the heat conductive seat (82), and the high temperature and high pressure resistant pipe (9).

6. A battery constant temperature system according to claim 5, It is characterized in that A concave placement groove (821) is formed on the upper side of the heat-conducting seat (82), and an upwardly-raised limiting groove (822) is formed on the lower side of the heat-conducting seat (82); the placement groove (821) is tightly fitted with the side wall of the columnar temperature sensor (81), and the limiting groove (822) is tightly fitted with the side wall of the high-temperature and high-pressure resistant pipeline (9).

7. A battery constant temperature system according to claim 5, It is characterized in that The fastener (83) comprises a band (831), a screw (832), and a holder (833); a screw mounting cavity (834) is provided in the holder (833); the screw (832) is rotatably mounted in the screw mounting cavity (834); and a plurality of slots (835) are provided on the band (831) and mesh with the screw (832).

8. A battery constant temperature system according to claim 7, It is characterized in that One end of the screw rod (832) is provided with a threaded hole, and the other end is tapered.

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