CN218957841U

CN218957841U - Battery pack

Info

Publication number: CN218957841U
Application number: CN202223164560.XU
Authority: CN
Inventors: 王辉
Original assignee: Weilai Battery Technology Anhui Co ltd
Current assignee: Weilai Battery Technology Anhui Co ltd
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2023-05-02
Anticipated expiration: 2032-11-28

Abstract

The utility model relates to a battery pack, which comprises a battery unit, a heat conducting rod and a cooling mechanism, wherein a heat conducting groove is formed in the battery unit, a first end part of the heat conducting rod enters the heat conducting groove from a first end part of the heat conducting groove, a second end part of the heat conducting rod is connected with the cooling mechanism, a gap exists between the first end part of the heat conducting rod and the second end part of the heat conducting groove, a cooling pipe is arranged around the periphery of the heat conducting rod, and the outer wall of the cooling pipe is in contact with the inner wall of the heat conducting groove. The utility model can avoid the direct contact between the heat conducting rod and the battery unit, thereby avoiding damage to the battery unit and improving the heat dissipation efficiency of the battery unit.

Description

Battery pack

Technical Field

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

Background

The power batteries of different systems have the problem of heat generation during charge and discharge, and the heat dissipation of the central area of the battery with larger size and capacity is extremely poor, which directly affects the service life and the safety of the battery. The existing power battery mainly relies on the battery side plate to conduct heat and dissipate heat, but the inside (especially the center) of the battery is difficult to conduct heat and dissipate heat, so that the size of the single battery can be reduced when the battery product is designed, heat conduction is facilitated, the capacity of the single battery is limited, in addition, in order to ensure that the electric quantity is unchanged, the size of the single battery is reduced, more single batteries are used, and the number of various connecting parts is increased, and the cost is increased. There are also heat dissipation schemes in the prior art that employ a heat conduction rod in direct contact with the battery cells, but in such schemes, the heat conduction rod is liable to cause damage to the battery cells.

Disclosure of Invention

The utility model aims to provide a battery pack, which is used for preventing a heat conduction rod from being in direct contact with a battery unit, so that the battery unit is prevented from being damaged, and the heat dissipation efficiency of the battery unit can be improved.

The aim of the utility model is achieved by adopting the following technical scheme. According to the battery pack provided by the utility model, the battery pack comprises a battery unit, a heat conducting rod and a cooling mechanism, wherein a heat conducting groove is formed in the battery unit, a first end part of the heat conducting rod enters the heat conducting groove from a first end part of the heat conducting groove, a second end part of the heat conducting rod is connected with the cooling mechanism, a gap exists between the first end part of the heat conducting rod and the second end part of the heat conducting groove, a cooling pipe is circumferentially arranged on the periphery of the heat conducting rod, and the outer wall of the cooling pipe is in contact with the inner wall of the heat conducting groove.

In some embodiments, a spiral accommodating groove is formed in the outer wall of the heat conducting rod, the cooling pipe surrounds the accommodating groove, and the cooling pipe is mutually attached to the accommodating groove.

In some embodiments, the first end of the heat conducting channel is disposed at the bottom of the battery cell and the second end of the heat conducting channel is proximate to the top of the battery cell.

In some embodiments, the thermally conductive rod is insulative.

In some embodiments, the material of the thermally conductive rod comprises at least one of graphene, hard alumina, silicone, epoxy.

In some embodiments, the thermally conductive slot is open at the center of the battery cell.

In some embodiments, the heat conducting rod houses a liquid cooling conduit.

In some embodiments, the shape of the heat conducting grooves and the heat conducting rods are adapted to the shape of the battery cells.

In some embodiments, the cooling mechanism includes a base plate, and the second end of the thermally conductive rod is connected to the base plate.

In some embodiments, the cooling mechanism further comprises a side plate connected to the bottom plate, the side plate in contact with a side wall of the battery cell.

The beneficial effects of the utility model at least comprise:

1. according to the utility model, the heat conducting groove is formed in the battery unit, the first end part of the heat conducting rod enters the heat conducting groove from the first end part of the heat conducting groove, the second end part of the heat conducting rod is connected with the cooling mechanism, a gap exists between the first end part of the heat conducting rod and the second end part of the heat conducting groove, the cooling pipe is arranged around the periphery of the heat conducting rod, the outer wall of the cooling pipe is in contact with the inner wall of the heat conducting groove, the heat conducting rod and the battery unit can be fixed through the cooling pipe, the heat conducting rod can be prevented from being in direct contact with the battery unit, so that damage to the battery unit is avoided, and the heat dissipation efficiency of the battery unit can be improved through the cooling pipe and the heat conducting rod.

2. The first end part of the heat conducting groove is arranged at the bottom of the battery unit, the second end part of the heat conducting groove is close to the top surface of the battery unit, and the first end part of the heat conducting rod enters the heat conducting groove from the first end part of the heat conducting groove, so that the contact area between the heat conducting rod and the battery unit is increased, the heat dissipation efficiency is further improved, and meanwhile, the second end part of the heat conducting groove is close to the top surface of the battery unit and does not penetrate through the top surface of the battery unit, so that the layout of the polar post and the polar lug at the top of the battery unit is not influenced.

3. The side plate of the cooling mechanism is connected with the bottom plate, and the side plate surrounds the plurality of battery units and contacts with the side walls of the plurality of battery units, so that the heat conduction efficiency of the battery units is improved.

The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model, as well as the preferred embodiments thereof, together with the following detailed description of the utility model given in conjunction with the accompanying drawings.

Drawings

Fig. 1 illustrates a schematic structure of a battery pack according to an embodiment of the present utility model;

fig. 2 is a schematic view showing the structure of a battery cell and a heat conductive rod of a battery pack according to an embodiment of the present utility model;

fig. 3 shows a schematic structural view of a heat conductive rod and a cooling pipe according to an embodiment of the present utility model.

Detailed Description

In order to further describe the technical means of the present utility model, the following detailed description of a specific embodiment of a battery pack according to the present utility model is given with reference to the accompanying drawings and preferred embodiments. The following examples are only for more clearly illustrating the technical solution of the present utility model, and therefore are only exemplary and are not intended to limit the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the term "comprising" in the description of the present application and the claims and in the description of the figures above, and any variants thereof.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the term "connected" should be construed broadly, and may be a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

As shown in fig. 1, 2 and 3, the battery pack according to the present utility model includes one or more battery cells 1, a heat conductive rod 2 and a cooling mechanism 3, and when the battery pack includes a plurality of battery cells 1, the plurality of battery cells 1 are connected in series or in parallel, and the battery cells 1 may be configured as a cylinder or a rectangular parallelepiped. The battery cell 1 further includes a post 12, the post 12 being provided on a top surface of the battery cell 1.

The inside of battery cell 1 is provided with heat conduction groove 11, and heat conduction groove 11 sets up along the main part of battery cell 1 in the inside of battery cell 1, and heat conduction groove 11's first end is constructed to open-ended, and heat conduction groove 11's first end sets up in the bottom of battery cell 1, and heat conduction rod 2's first end gets into heat conduction groove 11 from heat conduction groove 11's first end, and cooling mechanism 3 is connected to heat conduction rod 2's second end, specifically, heat conduction rod 2's second end accessible welding or screw fixed connection are on cooling mechanism 3's bottom plate 31. In one or more embodiments, the bottom plate 31 may be a metal plate. In some other embodiments, components for cooling may also be integrated onto the base plate 31. The second end of the heat conductive groove 11 is configured to be closed, and in one or more embodiments, the second end of the heat conductive groove 11 is close to the top surface of the battery cell 1, a gap exists between the first end of the heat conductive rod 2 and the second end of the heat conductive groove 11, the cooling tube 21 surrounds the outer circumference of the heat conductive rod 2, the cooling tube 21 is configured as a hose, cooling water can be passed through the inside, and the outer wall of the cooling tube 21 is in pressing contact with the inner wall of the heat conductive groove 11.

According to the utility model, the heat conducting groove 11 is arranged in the battery unit 1, the first end part of the heat conducting rod 2 enters the heat conducting groove 11 from the first end part of the heat conducting groove 11, the second end part of the heat conducting rod 2 is connected with the cooling mechanism 3, a gap exists between the first end part of the heat conducting rod 2 and the second end part of the heat conducting groove 11, the cooling pipe 21 surrounds the periphery of the heat conducting rod 2, the outer wall of the cooling pipe 21 is in contact with the inner wall of the heat conducting groove 11, the heat conducting rod 2 and the battery unit 1 can be fixed through the cooling pipe 21, the heat conducting rod 2 can be prevented from being in direct contact with the battery unit 1, and therefore damage to the battery unit 1 is avoided, and the heat dissipation efficiency of the battery unit 1 can be improved through the cooling pipe 21 and the heat conducting rod 2.

The utility model further provides a heat dissipation efficiency by arranging the first end of the heat conducting groove 11 at the bottom of the battery unit 1, wherein the second end of the heat conducting groove 11 is close to the top surface of the battery unit 1, the first end of the heat conducting rod 2 enters the heat conducting groove 11 from the first end of the heat conducting groove 11, the contact area between the heat conducting rod and the battery unit 1 is increased, and meanwhile, the second end of the heat conducting groove 11 is close to the top surface of the battery unit 1 and does not penetrate through the top surface of the battery unit 1, so that the layout of the pole 12 and the tab at the top of the battery unit 1 (such as the heat conducting groove 11 in the cylindrical battery unit 1 in fig. 2) is not influenced.

In some other embodiments, the heat conducting slots 11 may also be configured as through slots extending through the battery cell 1, in which embodiment the posts 12 take a back-off design, located on either side of the heat conducting slots 11, such as the heat conducting slots 11 in the square battery cell 1 of fig. 2 (such as the heat conducting slots 11 in the square battery cell 1 of fig. 2).

In one or more embodiments, the outer wall of the heat conducting rod 2 is provided with a spiral accommodating groove (not shown in the figure), the cooling tube 21 surrounds the accommodating groove, and the outer wall of the cooling tube 21 is mutually fit with the accommodating groove.

In one or more embodiments, the shape of the heat conduction groove 11 and the heat conduction rod 2 is adapted to the shape of the battery cell 1, and heat exchange efficiency can be improved. Specifically, when the battery cell 1 is configured as a cylinder, the heat conduction groove 11 and the heat conduction rod 2 are configured as cylinders, and when the battery cell 1 is configured as a rectangular parallelepiped, the heat conduction groove 11 and the heat conduction rod 2 are configured as rectangular cubes.

In a preferred embodiment, the heat conduction groove 11 is opened at the center of the battery cell 1. The utility model can improve the heat conduction efficiency in the battery unit by opening the heat conduction groove 11 in the center of the battery unit 1.

In a preferred embodiment, the heat conductive rod 2 has heat conductivity and insulation, and in order to achieve the aforementioned characteristics, the material used to manufacture the heat conductive rod 2 may include at least one of graphene, hard alumina, silicone, and epoxy. For example, as a specific embodiment, the heat conductive rod 2 may be made of one material of graphene, hard alumina, silicone, and epoxy.

In a preferred embodiment, the inside of the heat conductive rod 2 is provided with a liquid cooling pipe to improve cooling efficiency.

In one or more embodiments, the cooling mechanism 3 further includes a side plate 32, the side plate 32 is connected to the bottom plate 31, and the side plate 32 surrounds the plurality of battery cells 1 and contacts the side walls of the plurality of battery cells 1 to conduct heat to and dissipate heat from the battery cells 1. The side plates 32 may be metal plates.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to practice the present utility model. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the utility model. Thus, the present utility model is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a battery package, its characterized in that includes battery cell, heat conduction stick and cooling body, battery cell's inside is provided with the heat conduction groove, the first tip of heat conduction stick is followed the first tip of heat conduction groove gets into the heat conduction groove, the second end connection of heat conduction stick cooling body, there is the clearance between the first tip of heat conduction stick with the second tip of heat conduction groove, the periphery of heat conduction stick is encircleed there is the cooling tube, the outer wall of cooling tube with the inner wall contact of heat conduction groove.

2. The battery pack according to claim 1, wherein a spiral receiving groove is formed in the outer wall of the heat conducting rod, the cooling pipe surrounds the receiving groove, and the cooling pipe is attached to the receiving groove.

3. The battery pack of claim 1, wherein a first end of the thermally conductive slot is disposed at a bottom of the battery cell and a second end of the thermally conductive slot is proximate to a top of the battery cell.

4. The battery pack according to claim 1, wherein the heat conductive rod has insulation.

5. The battery pack of claim 1, wherein the thermally conductive rod material comprises at least one of graphene, hard alumina, silicone, epoxy.

6. The battery pack of claim 1, wherein the heat conducting slot is open at a center of the battery cell.

7. The battery pack of claim 1, wherein the heat conductive rod houses a liquid cooling conduit.

8. The battery pack of claim 2, wherein the shape of the heat conductive grooves and the heat conductive bars are adapted to the shape of the battery cells.

9. The battery pack of claim 1, wherein the cooling mechanism comprises a base plate, the second end of the thermally conductive rod being connected to the base plate.

10. The battery pack of claim 9, wherein the cooling mechanism further comprises a side plate connected to the bottom plate, the side plate being in contact with a side wall of the battery cell.