CN211629259U - Cooling system for battery pack - Google Patents

Abstract

The utility model provides a cooling system of battery package, cooling system of battery package includes: a first cooling pipe; a second cooling pipe; the cooling plate is connected between the first cooling pipe and the second cooling pipe and communicated with the first cooling pipe and the second cooling pipe, and the cooling plate is arranged on the upper surface and/or the lower surface of the battery pack. From this, through locating the cooling plate the upper surface and/or the lower surface of battery package can avoid cooling system to occupy battery package inner space, can increase the quantity that sets up of electric core in the battery package to can promote the energy density of battery package, and, also can set up cooling system in the battery package outside, can reduce the weight of battery package, also can reduce the manufacturing cost of battery package.

Description

Cooling system for battery pack

technical field

The utility model relates to the technical field of batteries, in particular to a cooling system for a battery pack.

Background technique

In the related art, the cooling system of the battery pack is arranged inside the battery pack, and the cooling system is located below the battery module, and the cooling system occupies the internal space of the battery pack, which leads to the reduction of the number of cells in the battery pack and reduces the energy density of the battery pack. . Also, the cooling system is provided inside the battery pack, resulting in an increase in the weight of the battery pack.

Utility model content

In view of this, the present invention aims to provide a cooling system for a battery pack, which can solve the problem of low energy density of the battery pack and the problem of the heavy weight of the battery pack.

In order to achieve the above object, the technical scheme of the present utility model is achieved in this way:

A cooling system for a battery pack includes: a first cooling pipe; a second cooling pipe; a cooling plate, wherein the cooling plate is connected between the first cooling pipe and the second cooling pipe and communicates with the first cooling pipe A pipe and the second cooling pipe, and the cooling plate is provided on the upper surface and/or the lower surface of the battery pack.

In some examples of the present invention, the first cooling pipe has a first refrigerant flow passage, the second cooling pipe has a second refrigerant flow passage, the cooling plate has a third refrigerant flow passage, and the third refrigerant flow passage The refrigerant passage is connected between the first refrigerant passage and the second refrigerant passage and communicates with both the first refrigerant passage and the second refrigerant passage.

In some examples of the present invention, the first cooling pipe or the second cooling pipe is provided with a water inlet and a water outlet.

In some examples of the present invention, there are multiple water inlets and one water outlet.

In some examples of the present invention, the cooling plate extends in the length direction of the battery pack, and the length of the cooling plate is greater than the length of the battery pack.

In some examples of the present invention, the cross-sections of the first cooling pipe and the second cooling pipe are both rectangular.

In some examples of the present invention, the cooling plate is one.

In some examples of the present invention, the cooling plates are plural, and the plurality of cooling plates are spaced apart in the length direction of the first cooling pipe.

In some examples of the present invention, the cooling plate and the battery pack are bonded by structural adhesive.

In some examples of the present invention, the structural adhesive is a thermally conductive structural adhesive.

Compared with the prior art, the cooling system for the battery pack of the present invention has the following advantages:

According to the cooling system of the battery pack of the present invention, by arranging the cooling plate on the upper surface and/or the lower surface of the battery pack, the cooling system can avoid occupying the internal space of the battery pack, and the number of cells in the battery pack can be increased. , so that the energy density of the battery pack can be improved, and the cooling system can also be arranged outside the battery pack, which can reduce the weight of the battery pack and reduce the production cost of the battery pack.

Description of drawings

The accompanying drawings that constitute a part of the present invention are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is an exploded view of a cooling system and a battery pack according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a cooling system according to an embodiment of the present invention.

Description of reference numbers:

battery pack 20;

cooling system 70;

The first cooling pipe 701; the second cooling pipe 702; the cooling plate 703; the first refrigerant passage 704; the second refrigerant passage 705; the water inlet 706;

Detailed ways

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

As shown in FIGS. 1 and 2 , the cooling system 70 of the battery pack 20 according to the embodiment of the present invention includes: a first cooling pipe 701 , a second cooling pipe 702 and a cooling plate 703 . The cooling plate 703 is connected between the first cooling pipe 701 and the second cooling pipe 702, and the cooling plate 703 communicates with the first cooling pipe 701 and the second cooling pipe 702, and the cooling plate 703 is arranged on the upper surface of the battery pack 20 and/or On the lower surface, it should be noted that the battery pack 20 has a casing, and the casing may include an upper casing and a lower casing. The cooling plate 703 of the cooling system 70 may only be disposed on the upper surface of the upper casing of the battery pack 20, The cooling system 70 may be provided only on the lower surface of the lower case of the battery pack 20 , and the cooling system 70 may be provided on the upper surface of the upper case and the lower surface of the lower case at the same time. In this case, there are two cooling systems 70 and one cooling system 70 Provided on the lower surface of the lower case of the battery pack 20 , another cooling system 70 is provided on the upper surface of the upper case of the battery pack 20 . Preferably, the cooling system 70 is only provided on the lower surface of the lower case of the battery pack 20 .

The first cooling pipe 701, the second cooling pipe 702, and the cooling plate 703 may be provided with a refrigerant (eg, water), and the refrigerant may circulate in the first cooling pipe 701, the second cooling pipe 702, and the cooling plate 703. Flow, the refrigerant can exchange heat with the battery pack 20 through the cooling plate 703 to achieve cooling and heating of the battery pack 20, so that the temperature of the battery pack 20 can be maintained at an optimum temperature. In this application, by arranging the cooling system 70 outside the battery pack 20, the cooling system 70 does not need to be arranged inside the battery pack 20. Compared with the prior art, the cooling system 70 can be prevented from occupying the internal space of the battery pack 20, and the number of batteries can be increased. The space for arranging cells in the battery pack 20 can increase the number of cells in the battery pack 20, thereby increasing the energy density of the battery pack 20. Moreover, since the cooling system 70 is not required inside the battery pack 20, the battery pack 20 can be reduced in size. The weight of the pack 20 can also reduce the production cost of the battery pack 20 .

Therefore, by arranging the cooling plate 703 on the upper surface and/or the lower surface of the battery pack 20, the cooling system 70 can be prevented from occupying the internal space of the battery pack 20, and the number of cells in the battery pack 20 can be increased, so that the The energy density of the battery pack 20 is improved, and the cooling system 70 can also be arranged outside the battery pack 20 , which can reduce the weight of the battery pack 20 and also reduce the production cost of the battery pack 20 .

In some embodiments of the present invention, as shown in FIG. 2 , the first cooling pipe 701 may have a first refrigerant flow passage 704 , the second cooling pipe 702 may have a second refrigerant flow passage 705 , and the cooling plate 703 may have a first refrigerant flow passage 705 . Three refrigerant passages, the third refrigerant passage is connected between the first refrigerant passage 704 and the second refrigerant passage 705, and the third refrigerant passage is in communication with the first refrigerant passage 704 and the second refrigerant passage 705 , wherein one end of the third refrigerant flow channel is communicated with the first refrigerant flow channel 704, and the other end of the third refrigerant flow channel is communicated with the second refrigerant flow channel 705, so that the first cooling pipe 701, the cooling plate 703 and the The second cooling pipes 702 are connected in sequence, which can ensure that the first cooling pipe 701, the cooling plate 703 and the second cooling pipe 702 are stored with refrigerant, thereby ensuring that the cooling system 70 can perform heat exchange with the battery pack 20, thereby ensuring that the cooling system 70 working reliability.

In some embodiments of the present invention, as shown in FIG. 2 , the first cooling pipe 701 or the second cooling pipe 702 is provided with a water inlet 706 and a water outlet 707 , wherein the water inlet 706 and the water outlet 707 can both be arranged at On the first cooling pipe 701, the water inlet 706 and the water outlet 707 are both communicated with the first refrigerant passage 704. After the refrigerant flows into the first refrigerant passage 704 from the water inlet 706, the refrigerant flows from the first refrigerant passage 704 into the third refrigerant passage 704. Refrigerant channel, then the refrigerant in the third refrigerant channel will flow into the second refrigerant channel 705, then the refrigerant in the second refrigerant channel 705 will flow into the third refrigerant channel, and then the refrigerant in the third refrigerant channel will flow into the third refrigerant channel. A refrigerant flow channel 704, and finally the refrigerant flows out of the first refrigerant flow channel 704 from the water outlet 707. In this way, the refrigerant can circulate in the cooling system 70, and the refrigerant can continuously exchange heat with the battery pack 20, so that the temperature of the battery pack 20 can be better maintained at an optimum temperature.

In some embodiments of the present invention, as shown in FIG. 2 , there may be multiple water inlets 706 and one water outlet 707 . It should be noted that there may be two water inlets 706 and two water outlets 707 . Located between the two water inlets 706, the water outlet 707 and the water inlet 706 can both be set to be circular, the diameter of the water outlet 707 is the same as the diameter of the water inlet 706, and the refrigerant flows from the two water inlets 706 into the cooling system 70 at the same time. , this arrangement can ensure the stable flow of the refrigerant in the cooling system 70 , so that the refrigerant can better exchange heat with the battery pack 20 .

In some embodiments of the present invention, as shown in FIG. 1 , the cooling plate 703 extends in the length direction of the battery pack 20 , and the length direction of the battery pack 20 refers to the front-rear direction in FIG. 1 , and the length dimension of the cooling plate 703 is The value is greater than the length dimension value of the battery pack 20. After the cooling plate 703 is assembled with the battery pack 20, this setting can prevent the first cooling pipe 701 and the second cooling pipe 702 from interfering with the battery pack 20, which can reduce the battery pack 20 and the battery pack 20. Overall height of cooling system 70 .

In some embodiments of the present invention, as shown in FIG. 2 , both the first cooling pipe 701 and the second cooling pipe 702 may be made of aluminum profiles, and the cross-sections of the first cooling pipe 701 and the second cooling pipe 702 may be Setting it as a rectangle can reduce the height of the first cooling pipe 701 and the second cooling pipe 702 to the greatest extent without affecting the refrigerant flow in the first cooling pipe 701 and the second cooling pipe 702 .

In some embodiments of the present invention, one cooling plate 703 may be provided, and at this time, the cooling plate 703 is a flat plate structure. After the cooling plate 703 and the battery pack 20 are assembled together, the distance between the cooling plate 703 and the battery pack 20 can be increased. The contact area can increase the heat transfer efficiency, so that the cooling effect of the cooling system 70 can be improved.

In some embodiments of the present invention, a plurality of cooling plates 703 may be provided, and the plurality of cooling plates 703 are arranged at intervals along the length direction of the first cooling pipe 701 . The number of cooling plates 703 may be four, and the four cooling plates 703 are spaced apart in the length direction of the first cooling pipe 701 . All of the four cooling plates 703 can be set as flat plates, so the height of the cooling plates 703 can be reduced, and the overall height of the battery pack 20 and the cooling system 70 can be further reduced.

In some embodiments of the present invention, the cooling plate 703 and the battery pack 20 can be bonded together by structural adhesive, so that the cooling plate 703 and the battery pack 20 can be assembled together reliably, and the cooling plate 703 and the battery pack 20 can be prevented from being assembled together. The pack 20 is separated, thereby ensuring that the cooling system 70 can exchange heat with the battery pack 20 .

In some embodiments of the present invention, the structural adhesive can be set as a thermally conductive structural adhesive, and the thermally conductive structural adhesive has a thermal conductivity. After the cooling plate 703 is assembled on the battery pack 20 through the thermally conductive structural adhesive, the thermally conductive structural adhesive can be placed on the battery pack 20 and the battery pack 20 and Heat conduction is conducted between the cooling plates 703 , so that heat exchange between the cooling plates 703 and the battery pack 20 can be ensured.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the within the scope of protection of the present invention.

Claims (10)

1. A cooling system (70) for a battery pack (20), characterized in that, comprising: a first cooling pipe (701); second cooling pipe (702); A cooling plate (703), the cooling plate (703) is connected between the first cooling pipe (701) and the second cooling pipe (702) and communicates with the first cooling pipe (701) and the The second cooling pipe (702), the cooling plate (703) is provided on the upper surface and/or the lower surface of the battery pack (20). 2 . The cooling system ( 70 ) of the battery pack ( 20 ) according to claim 1 , wherein the first cooling pipe ( 701 ) has a first refrigerant flow channel ( 704 ), and the second cooling pipe (702) has a second refrigerant flow channel (705), the cooling plate (703) has a third refrigerant flow channel, and the third refrigerant flow channel is connected between the first refrigerant flow channel (704) and the first refrigerant flow channel (704). The two refrigerant passages (705) are in communication with the first refrigerant passage (704) and the second refrigerant passage (705). 3. The cooling system (70) of the battery pack (20) according to claim 2, wherein the first cooling pipe (701) or the second cooling pipe (702) is provided with a water inlet (706) ) and the water outlet (707). 4. The cooling system (70) of the battery pack (20) according to claim 3, characterized in that there are multiple water inlets (706) and one water outlet (707). 5. The cooling system (70) for a battery pack (20) according to claim 1, wherein the cooling plate (703) extends in the length direction of the battery pack (20), and the cooling plate (703) extends in the length direction of the battery pack (20) The length of (703) is greater than the length of the battery pack (20). 6 . The cooling system ( 70 ) of the battery pack ( 20 ) according to claim 1 , wherein the cross sections of the first cooling pipe ( 701 ) and the second cooling pipe ( 702 ) are both rectangular. 7 . 7. The cooling system (70) of the battery pack (20) according to claim 1, wherein the cooling plate (703) is one. 8 . The cooling system ( 70 ) of the battery pack ( 20 ) according to claim 1 , wherein the cooling plate ( 703 ) is plural, and the plurality of cooling plates ( 703 ) are located in the first cooling pipe. 9 . (701) are spaced lengthwise. 9 . The cooling system ( 70 ) of the battery pack ( 20 ) according to claim 1 , wherein the cooling plate ( 703 ) and the battery pack ( 20 ) are bonded by structural adhesive. 10 . 10. The cooling system (70) of the battery pack (20) according to claim 9, wherein the structural adhesive is a thermally conductive structural adhesive.

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