Power battery thermal management unit assembly

Abstract

The utility model discloses a power battery heat management unit assembly which comprises a shell, a circulating water pump, a heat exchanger, a compressor, a condenser core body and a liquid storage drying filter are installed in the shell, an expansion water tank is further fixed outside the shell, and a circulating water inlet pipeline and a circulating water outlet pipeline are fixed in the shell. A water inlet connecting port of the circulating water inlet pipeline and a water outlet connecting port of the circulating water outlet pipeline are fixed on the shell and are exposed; an outlet of the circulating water pump is communicated with one end of a water flowing channel of the heat exchanger, and the other end of the water flowing channel is communicated with the circulating water outlet pipeline; the circulating water inlet pipeline is provided with a water supplementing opening, and the water outlet of the expansion water tank is communicated with the water supplementing opening through a pipeline. The unit assembly can simplify the work of assembly connection, and is simpler and more convenient to install.

Description

Technical Field

[0001] The utility model relates to the technical field of battery thermal management of new energy vehicles, and in particular to a power battery thermal management unit assembly. Background Art

[0002] With the popularization of new energy vehicles, the batteries of new energy vehicles need to be thermally managed when in use, and the thermal management unit assembly is to dissipate heat for the battery to ensure that the battery is working at an appropriate temperature. The current battery thermal management has a relatively mature solution, which uses compressors, condensers, heat exchangers, and battery cooling circulation loops to achieve battery cooling. The refrigerant circulates in the refrigerant circulation loop to form a low-temperature refrigerant. The low-temperature refrigerant and the higher-temperature coolant in the battery cooling circulation loop perform heat exchange in the heat exchanger, so that the temperature of the coolant is reduced. When the coolant circulates in the battery cooling circulation loop, it will take away the heat emitted by the battery, thereby cooling the battery. For example, the invention patent application document with patent publication number CN117537517 A discloses a thermal management unit and its condenser assembly, but this unit still has the following problems:

[0003] 1. The current unit also requires an expansion water tank when in use to ensure that the coolant in the battery cooling circulation water circuit can be replenished in time when it is missing. Therefore, after the current unit is installed on the vehicle, it is necessary to find a space to fix the expansion water tank, and then connect the expansion water tank to the battery cooling circulation loop, and then connect the battery cooling circulation loop to the thermal management unit. The connection and assembly are relatively cumbersome;

[0004] 2. The current layout of the thermal management unit is not compact enough, and the internal components are scattered, resulting in a larger size. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a power battery thermal management unit assembly, which can simplify the work of assembly and connection, and is easier and more convenient to install.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a power battery thermal management unit assembly, including a shell, a circulating water pump, a heat exchanger, a compressor, a condenser core and a liquid storage dry filter are installed in the shell, a condenser fan is fixed to the outside of the shell, the refrigerant outlet of the compressor is connected to the inlet of the condenser core, the outlet of the condenser core is connected to the inlet of the liquid storage dry filter, the outlet of the liquid storage dry filter is connected to one end of the refrigerant heat exchange pipeline, the other end of the refrigerant heat exchange pipeline is connected to one end of the refrigerant flow channel of the heat exchanger, and the other end of the refrigerant flow channel of the heat exchanger is connected to The refrigerant return port of the compressor is connected, and an expansion valve is arranged on the refrigerant heat exchange pipeline; an expansion water tank is also fixed on the outside of the shell, and a circulating water inlet pipe and a circulating water outlet pipe are fixed in the shell, and the water inlet connection port of the circulating water inlet pipe and the water outlet connection port of the circulating water outlet pipe are both fixed on the shell and exposed; the circulating water inlet pipe is connected with the inlet of the circulating water pump, and the outlet of the circulating water pump is connected with one end of the water flow channel of the heat exchanger, and the other end of the water flow channel is connected with the circulating water outlet pipe; a water replenishing port is arranged on the circulating water inlet pipe, and the water outlet of the expansion water tank is connected with the water replenishing port through a pipe.

[0007] As a preferred solution, the circulating water outlet pipe is further provided with an exhaust port, and the exhaust port is connected to the gas phase chamber in the circulating water tank through an exhaust pipe.

[0008] As a preferred solution, the expansion water tank is fixed to the side wall of the shell through a water tank connecting frame, the expansion water tank and the condenser core fan are located on opposite sides of the shell, the expansion water tank is provided with a filling port, a filling cap is threadedly installed on the filling port, and the expansion water tank is also provided with a liquid level sensor for detecting the liquid level of the expansion water tank.

[0009] As a preferred solution, the water tank connecting frame includes a hanging plate and a connecting seat, the connecting seat is detachably fixed inside the shell, the hanging plate and the connecting seat are detachably fixed, at least two hanging ears are arranged on one side of the expansion water tank, and the shell is provided with an avoidance window for facilitating the insertion of the hanging ears, the hanging ears are inserted from the avoidance window and fixed with the hanging plate bolts, and a supporting base plate for supporting the bottom of the expansion water tank is also fixed on the shell.

[0010] As a preferred solution, the outer shell includes a rectangular shell and an upper cover, the upper cover is detachably installed on the upper end of the shell, the shell includes a first side wall, a second side wall, a third side wall and a fourth side wall and a shell bottom plate that are fixedly connected, the circulating water pump and the compressor are fixed on the shell bottom plate, the compressor is arranged horizontally, and an electrical box is also fixed on the connecting seat, and the electrical box is located above the compressor.

[0011] As a preferred solution, the expansion water tank and the condenser core fan are respectively fixed on the second side wall and the fourth side wall, the heat exchanger is fixed on the first side wall of the shell, an ECU controller is also fixed on the fourth side wall, the circulating water pump and the liquid storage dry filter are close to the fourth side wall, the liquid storage dry filter is vertically arranged and detachably fixed on the fourth side wall, and the fourth side wall is also provided with a control button and a wiring harness connector.

[0012] As a preferred solution, handles are also provided on the second side wall and the fourth side wall.

[0013] As a preferred solution, a grounding wire is also fixed on the housing.

[0014] After adopting the above technical scheme, the effect of the utility model is as follows: a power battery thermal management unit assembly includes a shell, a circulating water pump, a heat exchanger, a compressor, a condenser core and a liquid storage drying filter are installed in the shell, a condenser fan is fixed on the outside of the shell, the refrigerant outlet of the compressor is connected to the inlet of the condenser core, the outlet of the condenser core is connected to the inlet of the liquid storage drying filter, the outlet of the liquid storage drying filter is connected to one end of the refrigerant heat exchange pipeline, the other end of the refrigerant heat exchange pipeline is connected to one end of the refrigerant flow channel of the heat exchanger, the other end of the refrigerant flow channel of the heat exchanger is connected to the refrigerant reflux port of the compressor, and an expansion valve is arranged on the refrigerant heat exchange pipeline; an expansion water tank is also fixed on the outside of the shell, a circulating water inlet pipe and a circulating water outlet pipe are fixed in the shell, and the water inlet connection of the circulating water inlet pipe The port and the water outlet connection port of the circulating water outlet pipe are both fixed on the shell and exposed; the circulating water inlet pipe is connected with the inlet of the circulating water pump, the outlet of the circulating water pump is connected with one end of the water flow channel of the heat exchanger, and the other end of the water flow channel is connected with the circulating water outlet pipe; a water replenishment port is arranged on the circulating water inlet pipe, and the water outlet of the expansion water tank is connected with the water replenishment port by a pipe. Therefore, the expansion water tank is fixed outside the shell of the unit assembly, and the expansion water tank is directly connected with the water replenishment port of the circulating water inlet pipe. When in use, it is only necessary to dock the two ports of the battery cooling circulation loop with the water inlet connection port of the circulating water inlet pipe and the water outlet connection port of the circulating water outlet pipe to complete the docking and assembly of the entire battery thermal management system. The installation is simpler and the pipe docking positions on the installation site are also reduced. Other pipes are connected before leaving the factory, thus avoiding leakage.

[0015] Since an exhaust port is also provided on the circulating water outlet pipe, the exhaust port is connected to the gas phase chamber in the circulating water tank through the exhaust pipe. Therefore, bubbles generated in the battery cooling circulation loop can be discharged from the exhaust port, thus ensuring a better battery cooling effect.

[0016] Furthermore, since the expansion water tank is fixed to the side wall of the shell through a water tank connecting frame, the expansion water tank and the condenser core fan are located on opposite sides of the shell, a filling port is provided on the expansion water tank, and a filling cover is threadedly installed on the filling port. The expansion water tank is also provided with a liquid level sensor for detecting the liquid level of the expansion water tank. The expansion water tank and the condenser chip fan are respectively located on both sides. In this way, the total amount distribution of the entire unit assembly can be more balanced, and the liquid level sensor can also timely detect the liquid level height in the expansion water tank to remind timely replenishment of water.

[0017] Furthermore, since the water tank connecting frame includes a hanging plate and a connecting seat, the connecting seat is detachably fixed to the inside of the shell, the hanging plate and the connecting seat are detachably fixed, at least two hanging ears are arranged on one side of the expansion water tank, and an avoidance window is arranged on the shell to facilitate the insertion of the hanging ears. The hanging ears are inserted from the avoidance window and fixed with the hanging plate bolts, and a supporting base plate supporting the bottom of the expansion water tank is also fixed on the shell. With the above structure, the expansion water tank can be better fixed to the shell, and the supporting base plate is also used to support the expansion water tank to ensure sufficient supporting force.

[0018] Furthermore, since the shell includes a rectangular shell and an upper cover, the upper cover can be detachably installed on the upper end of the shell, the shell includes a first side wall, a second side wall, a third side wall and a fourth side wall and a shell bottom plate that are fixedly connected, the circulating water pump and the compressor are fixed on the shell bottom plate, the compressor is arranged horizontally, and an electrical box is also fixed on the connecting seat, and the electrical box is located above the compressor. First, the upper cover can be opened, which is convenient for internal maintenance, and the compressor is arranged horizontally, and the compressor is relatively heavy. The horizontal arrangement can ensure that the shell has more areas to bear the compressor, ensure that the force of the overall shell is more uniform, and also make room for the upper part. The electrical box is arranged above the compressor, and some electrical components in the unit assembly can be integrated in the electrical box. Compared with other mechanical components and pipeline components, the probability of failure of electrical components will be higher, and the electrical box is at the top, and the upper cover shell is opened to inspect and replace the electrical components inside the electrical box.

[0019] Furthermore, since the expansion water tank and the condenser core fan are respectively fixed on the second side wall and the fourth side wall, the heat exchanger is fixed on the first side wall of the shell, an ECU controller is also fixed on the fourth side wall, the circulating water pump and the liquid storage dry filter are close to the fourth side wall, the liquid storage dry filter is vertically arranged and detachably fixed on the fourth side wall, and the fourth side wall is also provided with a control button and a wiring harness connector. After the above-mentioned arrangement and distribution is adopted, the water pump and the liquid storage dry filter are close to the fourth side wall and opposite to the heat exchanger, which optimizes the space, and the heat exchanger is fixed on the side wall, and the bottom can be suspended, which is convenient for the arrangement of pipeline connection and also convenient for subsequent maintenance operations.

[0020] Since the second side wall and the fourth side wall are also provided with handles, the unit assembly can be conveniently lifted by the handles. A grounding wire is also fixed on the shell. Since a vibration-damping rubber pad may be provided when the whole unit is fixed on a vehicle, the shell does not contact the vehicle body. In this way, the grounding is achieved by contacting the vehicle body with the grounding wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a structural stereogram of an embodiment of the utility model;

[0023] Figure 2 is a three-dimensional diagram of the structure after the upper cover, the first side wall and the third side wall are hidden;

[0024] Figure 3 It is a three-dimensional diagram of the structure from another angle after hiding the upper cover, the first side wall and the third side wall;

[0025] Figure 4 is a structural stereogram from another perspective after hiding the upper cover, the first side wall and the third side wall;

[0026] Figure 5 This is a stereoscopic diagram of the installation of the expansion tank;

[0027] In the accompanying drawings: 1. shell; 101. upper cover; 102. second side wall; 103. third side wall; 104. fourth side wall; 1041. avoidance window; 2. expansion water tank; 3. condenser fan; 4. condenser core; 5. liquid storage drying filter; 6. circulating water pump; 7. compressor; 8. heat exchanger; 9. circulating water inlet pipe; 91. internal circulating water inlet pipe section; 10. circulating water outlet pipe; 1001. internal circulating water outlet pipe section; 11. exhaust pipe; 12. water filling port; 13. wiring harness connector; 14. control button; 15. grounding wire; 16. electrical box; 17. water tank connecting frame; 171. hanging plate; 172. connecting seat; 173. supporting bottom plate; 18. refrigerant heat exchange pipeline; 19. refrigerant return pipeline; 20. expansion valve; 21. filling cap; 22. liquid level sensor; 23. hanging ear. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below through specific embodiments.

[0029] like Figures 1 to 5 As shown, a power battery thermal management unit assembly includes a shell 1. In this embodiment, the shell 1 includes a rectangular shell and an upper cover 101. The upper cover 101 is detachably installed on the upper end of the shell. The shell includes a first side wall, a second side wall 102, a third side wall 103 and a fourth side wall 104 fixedly connected and a shell bottom plate. A plurality of heat dissipation holes are opened on the first side wall, the second side wall 102, the third side wall 103 and the fourth side wall 104 to facilitate heat dissipation.

[0030] A circulating water pump 6, a heat exchanger 8, a compressor 7, a condenser core 4 and a liquid storage dry filter 5 are installed in the shell 1. A condenser fan 3 is fixed to the outside of the shell 1. The refrigerant outlet of the compressor 7 is connected to the inlet of the condenser core 4, and the outlet of the condenser core 4 is connected to the inlet of the liquid storage dry filter 5. The outlet of the liquid storage dry filter 5 is connected to one end of the refrigerant heat exchange pipeline 18, and the other end of the refrigerant heat exchange pipeline 18 is connected to one end of the refrigerant flow channel of the heat exchanger 8. The other end of the refrigerant flow channel of the heat exchanger 8 is connected to the refrigerant return port of the compressor 7 through the refrigerant return pipeline 19. An expansion valve 20 is arranged on the circuit 18; an expansion water tank 2 is also fixed to the outside of the shell 1, and a circulating water inlet pipe 9 and a circulating water outlet pipe 10 are fixed in the shell 1, and the water inlet connection port of the circulating water inlet pipe 9 and the water outlet connection port of the circulating water outlet pipe 10 are both fixed on the shell 1 and exposed; the circulating water inlet pipe 9 is connected to the inlet of the circulating water pump 6, the outlet of the circulating water pump 6 is connected to one end of the water flow channel of the heat exchanger 8, and the other end of the water flow channel is connected to the circulating water outlet pipe 10; a water replenishment port 12 is arranged on the circulating water inlet pipe 9, and the water outlet of the expansion water tank 2 is connected to the water replenishment port 12 by a pipe.

[0031] The circulating water outlet pipe 10 is also provided with an exhaust port, which is communicated with the gas phase chamber in the circulating water tank through an exhaust pipe 11 .

[0032] In this embodiment, the circulating water inlet pipe 9 includes an external circulating water inlet pipe section located outside the outer shell 1 and an internal circulating water inlet pipe section 91 located inside the outer shell 1, and the circulating water pump 6 is arranged in the internal circulating water inlet pipe section 91 to provide power for the circulating water. Similarly, the circulating water outlet pipe 10 also includes an external circulating water outlet pipe section located outside the outer shell 1 and an internal circulating water outlet pipe section 1001 located inside the outer shell 1, and the external circulating water inlet pipe section and the external circulating water outlet pipe section are both located below the expansion water tank 2.

[0033] like Figures 2 to 5 As shown, the expansion water tank 2 is fixed to the side wall of the housing 1 through a water tank connecting frame 17, the expansion water tank 2 and the condenser core fan are located on opposite sides of the housing 1, a filling port is provided on the expansion water tank 2, a filling cover 21 is threadedly installed on the filling port, and a liquid level sensor 22 for detecting the liquid level of the expansion water tank 2 is also provided on the expansion water tank 2. The circulating water pump 6 and the compressor 7 are fixed to the bottom plate of the housing, and the compressor 7 is arranged horizontally.

[0034] The water tank connection frame 17 includes a hanging plate 171 and a connecting seat 172. The hanging plate 171 in this embodiment is an L-shaped hanging plate 171, and the connecting seat 172 is also an L-shaped connecting seat 172. The connecting seat 172 is detachably fixed to the inside of the housing 1 by bolts. The hanging plate 171 and the connecting seat 172 are also detachably fixed by bolts. An electrical box 16 is also fixed to the connecting seat 172. The electrical box 16 is located above the compressor 7. The electrical box 16, the hanging plate 171 and the connecting seat 172 are fixed by penetrating bolts and nuts. At least two hanging ears 23 are provided on one side of the expansion water tank 2. The housing 1 is provided with a convenient hanging ear 23 to insert into the avoidance window 1041. The hanging ear 23 is inserted from the avoidance window 1041 and is bolted to the hanging plate 171. The housing 1 is also fixed with a supporting bottom plate 173 that supports the bottom of the expansion water tank 2. In this embodiment, the size of the avoidance window 1041 is consistent with the side size of the expansion water tank 2, so that when the hanging ear 23 of the expansion water tank 2 is extended, a part of the expansion water tank 2 can be in the avoidance window 1041. This also makes more reasonable use of space.

[0035] In this embodiment, the expansion tank 2 and the condenser core fan are fixed on the second side wall 102 and the fourth side wall 104 respectively, the heat exchanger 8 is fixed on the first side wall of the shell, the ECU controller is also fixed on the fourth side wall 104, the circulating water pump 6 and the liquid storage dry filter 5 are close to the fourth side wall 104, the liquid storage dry filter 5 is vertically arranged and detachably fixed on the fourth side wall 104, and the fourth side wall 104 is also provided with a control button 14 and a harness connector 13. The second side wall 102 and the fourth side wall 104 are also provided with handles. The shell 1 is also fixed with a grounding wire 15.

[0036] The specific principle of the utility model is: first, the unit assembly is installed on the new energy vehicle and the two ports of the battery cooling circulation loop are connected to the water outlet connection port and the water inlet connection port, and then cooling water is added to the expansion water tank 2, and the circulating water pump 6 is started to fill the battery cooling circulation loop with cooling water. The entire docking process only requires docking two ports, and the assembly is simpler and more convenient. The gas in the battery cooling circulation loop can enter the gas phase of the expansion water tank 2 to achieve exhaust. When the battery needs to be cooled, the compressor 7 starts to compress the refrigerant to form a high-temperature and high-pressure gaseous refrigerant. The gaseous refrigerant enters the condenser core 4 and flows for condensation. During the condensation process, the condenser fan 3 starts to accelerate the condensation. After the condensation is completed, it becomes a liquid refrigerant. The liquid refrigerant is dried and separated from the gas and liquid by the liquid storage drying filter 5, and then enters the heat exchanger 8 through the expansion valve 20. The heat exchanger 8 in this embodiment adopts a plate heat exchanger 8; and the cooling water is also supplied to the heat exchanger 8 through the circulating water pump 6. In this way, the low-temperature refrigerant will exchange heat with the cooling water, and finally the cooling water with reduced temperature is circulated to the battery cold plate to cool the battery.

[0037] The power battery thermal management unit assembly integrates the expansion water tank 2, which reduces the subsequent assembly and optimizes the layout to make the overall volume smaller. The electrical box 16 is integrated on the top to facilitate subsequent maintenance.

[0038] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solution of the present invention, without departing from the design spirit of the present invention, should fall within the scope of protection defined in the claims of the present invention.

Claims

1. A power battery thermal management unit assembly, comprising a shell, in which a circulating water pump, a heat exchanger, a compressor, a condenser core and a liquid storage dry filter are installed, a condenser fan is fixed to the outside of the shell, a refrigerant outlet of the compressor is connected to the inlet of the condenser core, the outlet of the condenser core is connected to the inlet of the liquid storage dry filter, the outlet of the liquid storage dry filter is connected to one end of a refrigerant heat exchange pipeline, the other end of the refrigerant heat exchange pipeline is connected to one end of a refrigerant flow channel of the heat exchanger, the other end of the refrigerant flow channel of the heat exchanger is connected to a refrigerant return port of the compressor, and an expansion valve is provided on the refrigerant heat exchange pipeline; characterized in that: An expansion water tank is also fixed to the outside of the shell, and a circulating water inlet pipe and a circulating water outlet pipe are fixed to the inside of the shell, and the water inlet connection port of the circulating water inlet pipe and the water outlet connection port of the circulating water outlet pipe are both fixed on the shell and exposed; the circulating water inlet pipe is connected to the inlet of a circulating water pump, the outlet of the circulating water pump is connected to one end of a water flow channel of a heat exchanger, and the other end of the water flow channel is connected to the circulating water outlet pipe; a water replenishing port is provided on the circulating water inlet pipe, and a pipe is connected between the water outlet of the expansion water tank and the water replenishing port.

2. A power battery thermal management unit assembly according to claim 1, characterized in that: The circulating water outlet pipe is also provided with an exhaust port, and the exhaust port is communicated with the gas phase chamber in the circulating water tank through the exhaust pipe.

3. A power battery thermal management unit assembly as claimed in claim 2, characterized in that: The expansion water tank is fixed to the side wall of the shell through a water tank connecting frame. The expansion water tank and the condenser core fan are located on opposite sides of the shell. A filling port is provided on the expansion water tank, and a filling cap is threadedly installed on the filling port. The expansion water tank is also provided with a liquid level sensor for detecting the liquid level of the expansion water tank.

4. A power battery thermal management unit assembly as claimed in claim 3, characterized in that: The water tank connecting frame includes a hanging plate and a connecting seat, the connecting seat is detachably fixed inside the shell, the hanging plate and the connecting seat are detachably fixed, at least two hanging ears are arranged on one side of the expansion water tank, and the shell is provided with an avoidance window for facilitating the insertion of the hanging ears, the hanging ears are inserted from the avoidance window and fixed with the hanging plate bolts, and a supporting bottom plate for supporting the bottom of the expansion water tank is also fixed on the shell.

5. A power battery thermal management unit assembly as claimed in claim 4, characterized in that: The outer shell includes a rectangular shell and an upper cover, the upper cover is detachably mounted on the upper end of the shell, the shell includes a first side wall, a second side wall, a third side wall and a fourth side wall and a shell bottom plate that are fixedly connected, the circulating water pump and the compressor are fixed on the shell bottom plate, the compressor is arranged horizontally, and an electrical box is also fixed on the connecting seat, and the electrical box is located above the compressor.

6. A power battery thermal management unit assembly as claimed in claim 5, characterized in that: The expansion water tank and the condenser core fan are respectively fixed on the second side wall and the fourth side wall, the heat exchanger is fixed on the first side wall of the shell, an ECU controller is also fixed on the fourth side wall, the circulating water pump and the liquid storage drying filter are close to the fourth side wall, the liquid storage drying filter is vertically arranged and detachably fixed on the fourth side wall, and a control button and a wiring harness connector are also provided on the fourth side wall.

7. A power battery thermal management unit assembly as claimed in claim 6, characterized in that: The second side wall and the fourth side wall are also provided with handles.

8. The power battery thermal management unit assembly according to claim 1, characterized in that: A grounding wire is also fixed on the shell.

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