CN214477649U

CN214477649U - Battery thermal management system and electric vehicle

Info

Publication number: CN214477649U
Application number: CN202120735763.6U
Authority: CN
Inventors: 徐盛; 杨涛; 王爱淇
Original assignee: Songz Automobile Air Conditioning Co Ltd
Current assignee: Songz Automobile Air Conditioning Co Ltd
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2021-10-22
Anticipated expiration: 2031-04-12

Abstract

The utility model relates to an electric vehicle technical field discloses a battery thermal management system and electric vehicle. The battery heat management system comprises a battery module and a heat exchange pipeline, wherein cooling liquid in the heat exchange pipeline is used for cooling the battery module, a water pump and a heat exchanger are sequentially arranged on the heat exchange pipeline along the flowing direction of the cooling liquid, an exhaust tank is arranged at the inlet of the water pump or at the outlet of the heat exchanger, the battery heat management system further comprises a water tank, the water tank is communicated with an exhaust port at the top of the exhaust tank through a first gas pipe so as to exhaust gas in the exhaust tank into the water tank, and a liquid outlet of the water tank is communicated with the heat exchange pipeline. The utility model discloses a battery thermal management system's air discharge tank can make the gaseous water tank of discharging into in the heat transfer pipeline to realize adding the notes coolant liquid fast, conveniently, compare with the current scheme of adding the notes coolant liquid, the cost of filling is lower.

Description

Battery thermal management system and electric vehicle

Technical Field

The utility model relates to an electric vehicle technical field especially relates to a battery thermal management system and electric vehicle.

Background

The existing electric vehicle is integrated with a battery thermal management system, a water tank is connected to the highest point of a carriage in order to fill cooling liquid and supplement the cooling liquid into a heat exchange pipeline of the battery thermal management system, and one or more water pumps are connected to corresponding positions in order to provide power for normal operation of the battery thermal management system, however, the existing battery thermal management system still has the following problems: when the cooling liquid is filled for the first time, the gas pressure in the heat exchange pipeline is high, the requirement for emptying cannot be met by independently operating the water pump, and the cooling liquid cannot be filled; in the prior art, the heat exchange pipeline is emptied by starting and stopping the water pump for multiple times, the operation is complex, the operation is difficult to completely empty the gas in the heat exchange pipeline, the filling time of the cooling liquid is long, and the manual operation cost is increased; in the prior art, the heat exchange pipeline is evacuated and pressurized to inject the cooling liquid, the operation is simple, but the equipment purchase cost is high, once the electric vehicle leaves a factory, the later maintenance of the heat exchange pipeline cannot be performed without the equipment, and the maintenance cost is high.

SUMMERY OF THE UTILITY MODEL

Based on above, an object of the utility model is to provide a battery thermal management system and electric vehicle has solved the problem that the filling coolant liquid that prior art exists is with high costs, the operation is complicated, evacuation difficulty and evacuation time are longer.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a battery thermal management system, includes battery module and heat transfer pipeline, coolant liquid in the heat transfer pipeline is used for the cooling the battery module follows the flow direction of coolant liquid, heat transfer pipeline is equipped with water pump and heat exchanger in proper order, the import department of water pump perhaps the exit of heat exchanger is equipped with the exhaust can, battery thermal management system still includes the water tank, the water tank with the gas vent at exhaust can top is through first gas pipe intercommunication in order to incite somebody to action gas in the exhaust can is discharged the water tank, the liquid outlet of water tank with the heat transfer pipeline intercommunication.

As a preferable scheme of the battery thermal management system, an air vent is arranged at the upper part of the water tank, and the air vent is communicated with the air outlet.

As a preferred scheme of the battery thermal management system, the exhaust tank is arranged at an outlet of the heat exchanger, the battery thermal management system further comprises a second gas pipe, one end of the second gas pipe is communicated with the heat exchange pipeline between the water pump and the battery module, and the other end of the second gas pipe is communicated with the vent.

As a preferred scheme of the battery thermal management system, the exhaust tank is arranged between the water pump and the battery module, and the connection position of the water tank and the heat exchange pipeline is located between the exhaust tank and the water pump.

As a preferred scheme of the battery thermal management system, the exhaust tank comprises a tank body, the lower parts of the two ends of the tank body are respectively provided with a first liquid port and a second liquid port, the first liquid port is used for introducing cooling liquid for cooling the battery module, and the second liquid port is communicated with an inlet of the water pump.

As a preferred scheme of battery thermal management system, the internal filter that is equipped with of jar, be equipped with the filtration hole on the filter, through first liquid mouth gets into coolant liquid in the jar body gets into the water pump through in proper order the filtration hole with second liquid mouth gets into.

As a preferable scheme of the battery thermal management system, the filtering holes are round holes, elliptical holes or polygonal holes.

As a preferred scheme of the battery thermal management system, a liquid outlet of the water tank is communicated with the heat exchange pipeline through a liquid pipe, and the distance between the connection position of the liquid pipe and the heat exchange pipeline and the outlet of the water pump is less than or equal to 0.5 m.

Preferably, the top of the water tank is provided with openings for discharging gas and filling coolant as a preferred scheme of the battery thermal management system.

As a preferable scheme of the battery thermal management system, the water tank is higher than the heat exchange pipeline connecting the exhaust tank and the water pump.

An electric vehicle, includes carriage and above any battery thermal management system, the battery module sets up the bottom in carriage, the exhaust can, the water pump reaches the water tank all sets up the top in carriage.

The utility model has the advantages that: the utility model discloses a battery thermal management system's air discharge tank can make the gaseous water tank of discharging into in the heat transfer pipeline to realize adding the notes coolant liquid fast, conveniently, compare with the current scheme of adding the notes coolant liquid, the cost of filling is lower.

The utility model discloses an electric vehicle is because of having the aforesaid battery thermal management system, has the advantage that annotates the coolant liquid swiftly and with annotating with low costs equally.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic diagram of a battery thermal management system according to an embodiment of the present invention;

FIG. 2 is a schematic view of an exhaust canister according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a battery thermal management system according to another embodiment of the present invention;

fig. 4 is a schematic diagram of a battery thermal management system according to another embodiment of the present invention.

In the figure:

1. a battery module; 2. a heat exchange line; 3. an exhaust tank; 301. an exhaust port; 302. a first liquid port; 303. a second liquid port; 31. a tank body; 32. a filter plate; 4. a water pump; 5. a heat exchanger; 6. a water tank; 601. a liquid outlet; 602. a vent; 603. an opening; 71. a first gas pipe; 72. a second gas pipe; 8. a liquid pipe.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment provides a battery thermal management system, as shown in fig. 1 and 2, the battery thermal management system includes a battery module 1 and a heat exchange pipeline 2, coolant in the heat exchange pipeline 2 is used for cooling the battery module 1, along the flowing direction of the coolant, an exhaust tank 3, a water pump 4 and a heat exchanger 5 are sequentially arranged on the heat exchange pipeline 2, the battery thermal management system further includes a water tank 6, the water tank 6 is communicated with an exhaust port 301 at the top of the exhaust tank 3 through a first air pipe 71 so as to exhaust gas in the exhaust tank 3 into the water tank 6, a liquid outlet 601 of the water tank 6 is communicated with the heat exchange pipeline 2, and the communication position of the liquid outlet 601 and the heat exchange pipeline is located between the exhaust tank 3 and the water pump 4.

It should be noted that the heat exchanger 5 of this embodiment is a plate heat exchanger, and the plate heat exchanger is used because of having advantages such as heat exchange efficiency is high, the heat loss is little, compact structure is light and handy, area is little, installation washing convenience and long service life, has guaranteed that the temperature of coolant liquid can reduce, and then cools off battery module 1.

The air discharge tank 3 of the battery thermal management system provided by the embodiment can discharge the gas in the heat exchange pipeline 2 into the water tank 6, so that the coolant can be quickly and conveniently injected, compared with the existing coolant injection scheme, the injection cost is lower, the air discharge tank 3 is arranged between the heat exchanger 5 and the water pump 4, the coolant can be prevented from flowing back into the first air pipe 71, and the operation efficiency of the battery thermal management system is improved.

Specifically, as shown in fig. 1, the upper portion of the water tank 6 of the present embodiment is provided with an air vent 602, and the air vent 602 communicates with the air outlet 301. If the position of air vent 602 on water tank 6 is low, once the liquid level of the coolant in water tank 6 is higher than the height of air vent 602, the coolant in water tank 6 can enter exhaust tank 3 through first gas tube 71, make the unable normal discharge of gas in the exhaust tank 3, and set up air vent 602 on the upper portion of water tank 6 and can guarantee that the gas in the exhaust tank 3 enters water tank 6 through first gas tube 71 and air vent 602 at a time, guaranteed the normal discharge of the gas in the heat exchange pipeline 2.

As shown in fig. 2, the exhaust tank 3 of the present embodiment includes a tank 31, the tank 31 is a cylindrical tube, the lower portions of the two ends of the tank 31 are respectively provided with a first liquid port 302 and a second liquid port 303, the first liquid port 302 is used for introducing cooling liquid for cooling the battery module 1, and the second liquid port 303 is communicated with the inlet of the water pump 4. The jar of body 31 is equipped with filter 32 in, is equipped with the filtration pore on the filter 32, and this filtration pore is the round hole, and the coolant liquid that gets into jar body 31 through first liquid mouth 302 gets into water pump 4 through filtration pore and second liquid mouth 303 in proper order. In other embodiments, the tank 31 may also be a rectangular parallelepiped or other cylindrical structure, and the filtering holes are elliptical holes, polygonal holes or other holes, and are specifically arranged according to actual needs.

When the coolant in the heat exchange pipeline 2 and the gas mixed in the coolant enter the exhaust tank 3 through the first liquid port 302, the gas enters the exhaust tank 3 and enters the water tank 6 through the exhaust port 301, the first air pipe 71 and the vent 602, the coolant is filtered by the filter plate 32 and then enters the water pump 4 through the second liquid port 303 and the heat exchange pipeline 2, the coolant is filtered, the probability that the coolant blocks the water pump 4 due to impurities is reduced, and the normal and stable operation of the battery heat management system is ensured.

The water tank 6 of this embodiment is an expansion tank, and the capacity of the expansion tank is selected according to actual requirements. The liquid outlet 601 of the water tank 6 is communicated with the heat exchange pipeline 2 through a liquid pipe 8, and the distance between the connecting position of the liquid pipe 8 and the heat exchange pipeline 2 and the outlet of the water pump 4 is less than or equal to 0.5 m. The connection position of the liquid pipe 8 and the heat exchange pipeline 2 is close to the inlet of the water pump 4, so that the cooling liquid in the water tank 6 can conveniently enter the water pump 4 through the heat exchange pipeline 2, and the battery heat management system can normally run.

The power of the water pump 4 of this embodiment is selected according to actual need, and any throttling or shunting pipeline is not set up between the inlet of the water pump 4 and the connection position of the liquid pipe 8 and the heat exchange pipeline 2, but auxiliary filling equipment such as pressurization filling or vacuum pumping can be set up according to actual need, and the coolant liquid discharged from the outlet of the water pump 4 is directly used for cooling the battery module 1 through the heat exchange pipeline 2.

As shown in fig. 1, the top of the water tank 6 of the present embodiment is provided with an opening 603 for discharging gas and filling with coolant. Specifically, when the coolant needs to be added to the battery thermal management system, the coolant is added to the water tank 6 through the opening 603, and during the addition of the coolant, the gas in the exhaust tank 3 can enter the water tank 6 through the first gas pipe 71 and be discharged to the outside through the opening 603.

As shown in fig. 1, the water tank 6 of the present embodiment is higher than the heat exchange line 2 connecting the exhaust tank 3 and the water pump 4. If the bottom of water tank 6 is less than heat transfer pipeline 2 of connecting exhaust tank 3 and water pump 4, the coolant liquid in at least some water tanks 6 can't flow to in the heat transfer pipeline 2, and the water tank 6 of this embodiment is higher than the heat transfer pipeline 2 of connecting exhaust tank 3 and water pump 4, can guarantee that the coolant liquid in water tank 6 flows to in the heat transfer pipeline 2 under the effect of gravity, guarantees the normal filling of coolant liquid.

In other embodiments, as shown in fig. 3, the exhaust tank 3 may also be disposed at the outlet of the heat exchanger 5, and the water tank 6 is communicated with the exhaust port 301 at the top of the exhaust tank 3 through the first air pipe 71, and the connection position of the liquid pipe 8 and the heat exchange pipeline 2 is located between the battery module 1 and the inlet of the water pump 4. In other embodiments, as shown in fig. 4, the exhaust tank 3 may be further disposed at the outlet of the heat exchanger 5, the connection position of the liquid pipe 8 and the heat exchange pipeline 2 is located between the battery module 1 and the inlet of the water pump 4, the water tank 6 is communicated with the exhaust port 301 at the top of the exhaust tank 3 through the first gas pipe 71, and the battery thermal management system further includes a second gas pipe 72, one end of the second gas pipe 72 is communicated with the heat exchange pipeline 2 located between the water pump 4 and the battery module 1, and the other end of the second gas pipe 72 is communicated with the vent 602 so that the gas in the heat exchange pipeline 2 located between the water pump 4 and the battery module 1 is exhausted into the water tank 6 through the second gas pipe 72.

This embodiment still provides an electric vehicle, including carriage and this embodiment battery thermal management system, battery module 1 sets up in the bottom of carriage, and exhaust can 3, water pump 4 and water tank 6 all set up the top in carriage.

The electric vehicle provided by the embodiment has the advantages of quick coolant filling, low filling cost and high operation efficiency due to the battery thermal management system.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. The utility model provides a battery thermal management system, its characterized in that, includes battery module (1) and heat transfer pipeline (2), the coolant liquid in heat transfer pipeline (2) is used for the cooling battery module (1), follows the flow direction of coolant liquid, be equipped with water pump (4) and heat exchanger (5) on heat transfer pipeline (2) in proper order, the import department of water pump (4) perhaps the exit of heat exchanger (5) is equipped with air discharge tank (3), battery thermal management system still includes water tank (6), water tank (6) with gas vent (301) at air discharge tank (3) top communicate through first gas pipe (71) in order with gas in the air discharge tank (3) is discharged water tank (6), the liquid outlet (601) of water tank (6) with heat transfer pipeline (2) intercommunication.

2. The battery thermal management system according to claim 1, characterized in that a vent (602) is provided at an upper portion of the water tank (6), the vent (602) communicating with the air outlet (301).

3. The battery thermal management system according to claim 2, wherein the exhaust tank (3) is disposed at an outlet of the heat exchanger (5), and the battery thermal management system further comprises a second gas pipe (72), wherein one end of the second gas pipe (72) is communicated with the heat exchange pipeline (2) between the water pump (4) and the battery module (1), and the other end of the second gas pipe is communicated with the vent (602).

4. The battery thermal management system according to claim 1, characterized in that the exhaust tank (3) is arranged between the water pump (4) and the battery module (1), and the connection position of the water tank (6) and the heat exchange pipeline (2) is located between the exhaust tank (3) and the water pump (4).

5. The battery thermal management system according to claim 4, characterized in that the exhaust tank (3) comprises a tank body (31), the lower parts of two ends of the tank body (31) are respectively provided with a first liquid port (302) and a second liquid port (303), the first liquid port (302) is used for introducing the cooling liquid for cooling the battery module (1), and the second liquid port (303) is communicated with an inlet of the water pump (4).

6. The battery thermal management system according to claim 5, wherein a filter plate (32) is disposed in the tank (31), the filter plate (32) is provided with a filter hole, and the coolant entering the tank (31) through the first liquid port (302) sequentially enters the water pump (4) through the filter hole and the second liquid port (303).

7. The battery thermal management system according to claim 4, characterized in that the liquid outlet (601) of the water tank (6) is communicated with the heat exchange pipeline (2) through a liquid pipe (8), and the distance between the connection position of the liquid pipe (8) and the heat exchange pipeline (2) and the outlet of the water pump (4) is less than or equal to 0.5 m.

8. The battery thermal management system according to claim 1, characterized in that the top of the water tank (6) is provided with openings (603) for gas discharge and coolant filling.

9. The battery thermal management system according to claim 1, characterized in that the water tank (6) is higher than the heat exchange line (2) connecting the exhaust tank (3) and the water pump (4).

10. An electric vehicle, characterized in that it comprises a cabin and a battery thermal management system according to any one of claims 1-9, the battery module (1) is arranged at the bottom of the cabin, and the exhaust tank (3), the water pump (4) and the water tank (6) are all arranged at the top of the cabin.