CN217719753U - Battery with a battery cell - Google Patents

Abstract

The utility model provides a battery, include: a pole core; the heat pipe is arranged on the pole core and used for dissipating heat; the heat pipe is of a plate-shaped structure, the heat pipe is bonded with the pole core through the heat conducting glue, the heat pipe is bonded on the pole core inside the battery through the heat conducting glue, the contact area between the plate-shaped heat pipe and the pole core is larger, the heat conducting area is increased, meanwhile, the heat conducting efficiency between the pole core and the heat pipe is further improved through the heat conducting glue, the temperature inside the battery is favorably reduced, and the performance and the safety of the battery are improved.

Description

Battery

technical field

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

Background technique

Compared with traditional fuel vehicles, electric vehicles do not emit exhaust gas during driving and do not pollute the environment; the conversion efficiency of the motor is higher and energy is saved; there is no engine, gearbox, exhaust system, etc., and the structure is simple and easy to manufacture; moving parts Less, less noise and other advantages. Under the background of environmental protection, energy saving and emission reduction, it has attracted the attention of the government, complete machine manufacturers and consumers. In recent years, the sales penetration rate has increased year by year, reaching 10% in 2022. However, the long charging time of electric vehicles has become the main problem hindering its development. Therefore, fast charging technology has become an important development direction for battery factories and complete machine factories.

During the fast charging process, the current is large, which will generate a lot of heat. If it cannot be effectively dissipated, it will cause the temperature of the battery to rise, cause the attenuation of battery performance, and even cause safety problems. At present, in electric vehicles, air cooling or water cooling is mainly used to dissipate heat from the battery, and the temperature of the battery is lowered by taking away the heat from the surface of the battery. Batteries in the prior art cannot efficiently dissipate internal heat.

Therefore, it is necessary to develop a new type of battery to improve some of the above-mentioned problems in the prior art.

Utility model content

The purpose of the utility model is to provide a battery, which can efficiently export the internal heat of the battery.

In order to achieve the above purpose, the battery provided by the utility model includes: a pole core; a heat pipe, the heat pipe is arranged on the pole core for heat dissipation; the heat pipe is a plate-shaped structure, and the heat pipe and the pole core Bonded with thermally conductive adhesive.

The beneficial effect of the battery provided by the utility model is that: the heat pipe is bonded to the pole core inside the battery through thermally conductive glue, and the contact area between the plate-shaped heat pipe and the pole core is larger, increasing At the same time, the heat-conducting glue further improves the heat conduction efficiency between the pole core and the heat pipe, which is beneficial to reduce the internal temperature of the battery, so as to improve the performance and safety of the battery.

Optionally, several pole cores are arranged along a first direction, and the heat pipe is arranged between two adjacent pole cores centered in the first direction. Its beneficial effect is that: one heat pipe is arranged between the two adjacent pole cores in the middle, and the uniformity of heat dissipation on both sides of the battery can be achieved at a lower cost with only one heat pipe. cooling efficiency.

Optionally, the surface of the heat pipe coincides with the surface of the pole core. The beneficial effect is that it is beneficial to increase the heat exchange area between the heat pipe and the pole core.

Optionally, the end surface of the heat pipe extends to the shell and coincides with the surface of the shell. The beneficial effect is that the battery casing is connected to the external heat dissipation system, and extending the heat pipe to the casing and making the surfaces of the two coincide is conducive to exporting the heat inside the battery to the external heat dissipation system through the casing.

Optionally, the heat pipe is T-shaped, the heat pipe includes a horizontal part and a vertical part, the surface of the horizontal part coincides with the surface of the casing, and the surface of the vertical part coincides with the surface of the pole core . The beneficial effect is that: the T-shaped heat pipe has a horizontal portion, which can increase the heat exchange area between the heat pipe and the shell, and improve the heat dissipation efficiency.

Optionally, the pole core includes a diaphragm, and the heat pipe is bonded to the diaphragm.

Optionally, an insulating coating is provided on the surface of the heat pipe, and the material of the coating has thermal conductivity. The beneficial effect is that: the heat pipe made of metal material can have good thermal conductivity, the insulating coating can reduce the risk of short circuit caused by the heat pipe made of metal material, and improve the safety of the battery.

Optionally, the material of the insulating coating includes any one of thermally conductive silicone grease, thermally conductive silica gel, thermally conductive phase change material, thermally conductive rubber, and thermally conductive ceramic material.

Optionally, the width W ₁ of the pole core, the thickness T ₁ of the pole core, and the width W of the heat pipe ≤ W ₁ −T ₁ .

Description of drawings

Fig. 1 is a schematic diagram of the internal structure of the battery described in the first embodiment of the present invention;

2 is a schematic diagram of the internal structure of the battery described in the second embodiment of the present invention;

Fig. 3 is a schematic structural view of the bottom pallet shown in Fig. 2;

Fig. 4 is a schematic diagram of the internal structure of the battery described in the third embodiment of the present invention;

Fig. 5 is a schematic diagram of the internal structure of the battery in the fourth embodiment of the present invention.

Reference numerals in the figure: 1, heat pipe; 2, pole core; 3, bottom support plate; 4, shell; 101, vertical part; 102, horizontal part; 301, square hole.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention. rather than all examples. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model. Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by those skilled in the art to which the present invention belongs. As used herein, "comprising" and similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, without excluding other elements or items.

In order to solve the problems existing in the prior art, the embodiment of the utility model provides a battery.

FIG. 1 is a schematic diagram of the internal structure of the battery in the first embodiment of the present invention.

In some embodiments of the present utility model, referring to Fig. 1, the battery includes: a pole core 2 and a heat pipe 1, the heat pipe 1 is arranged on the pole core 2 for heat dissipation, the heat pipe 1 is a plate structure, and the The heat pipe 1 and the pole core 2 are bonded by thermally conductive glue.

In some embodiments of the present utility model, referring to FIG. 1 , there are two pole cores 2 , and the heat pipe 1 is arranged between two adjacent pole cores 2 .

In some embodiments of the present utility model, the number of the pole cores 2 is four, and one heat pipe 1 is arranged between two adjacent pole cores 2 located in the center.

In some embodiments of the present utility model, the number of the pole cores 2 is four, and the three heat pipes 1 are respectively arranged between any two adjacent pole cores 2 among the four pole cores 2 .

In some embodiments of the present utility model, the surface of the heat pipe 1 coincides with the surface of the pole core 2 , that is, the adjacent surfaces between the heat pipe 1 and the pole core 2 coincide.

In some embodiments of the present utility model, the shape of the heat pipe 1 and the pole core 2 are the same, both of which are plate-like structures, and the surfaces formed by the length and width of the heat pipe 1 and the pole core 2 overlap each other, That is, the surfaces with the largest areas coincide with each other.

FIG. 2 is a schematic diagram of the internal structure of the battery in the second embodiment of the present invention; FIG. 3 is a schematic diagram of the structure of the bottom plate shown in FIG. 2 .

In some embodiments of the present utility model, referring to Fig. 2 and Fig. 3, the battery further includes a bottom support plate 3, and a square hole 301 is opened on the bottom support plate 3, and the heat pipe 1 passes through the bottom support plate 3 The square hole 301 on the top extends to the casing 4 and coincides with the surface of the casing 4. The other side of the casing 4 is provided with a heat dissipation plate for an external heat dissipation system. The external heat dissipation system can be air-cooled or water-cooled. To dissipate heat, the heat inside the battery is transferred from the heat pipe 1 to the casing 4, and then to the heat dissipation plate of the external heat dissipation system through the casing 4.

Fig. 4 is a schematic diagram of the internal structure of the battery in the third embodiment of the present invention.

In some embodiments of the present utility model, referring to FIG. 4 , the heat pipe 1 is in a T-shape, and the heat pipe 1 includes a horizontal portion 102 and a vertical portion 101, the surface of the horizontal portion 102 coincides with the surface of the shell 4, The surface of the vertical portion 101 coincides with the surface of the pole core 2 .

Fig. 5 is a schematic diagram of the internal structure of the battery in the fourth embodiment of the present invention.

In some embodiments of the present invention, referring to FIG. 5 , the pole core 2 includes a diaphragm, and the heat pipe 1 is disposed inside the pole core 2 and attached to the diaphragm.

In some embodiments of the present invention, the heat pipe 1 is made of metal materials that can have good thermal conductivity, and the metal materials include but not limited to copper, aluminum, nickel, stainless steel, etc., and the insulating coating can reduce the thermal conductivity of the metal materials. The material of the heat pipe 1 causes the risk of short circuit and improves the safety of the battery. An insulating coating is provided on the surface of the heat pipe 1, and the material of the coating has thermal conductivity.

In some embodiments of the present invention, the material of the insulating coating includes any one of heat-conducting silicone grease, heat-conducting silica gel, heat-conducting phase change material, heat-conducting rubber, and heat-conducting ceramic material.

In some embodiments of the present invention, the width W ₁ of the pole core, the thickness T ₁ of the pole core, and the width W of the heat pipe are determined by the following formula, W≤W ₁ -T ₁ .

Embodiments 1-5 of the present utility model respectively provide a battery. The battery in Embodiment 1-5 is a square shell battery with a size of 33mm*220mm*105mm and a capacity of 115Ah. There are 2 pole cores inside the battery cell . The charging process is constant current charging at the specified current to the cut-off voltage (4.3V), constant voltage to 0.05C, and an ambient temperature of 25°C; the battery in Examples 1-5 has the highest heat pipe height, heat pipe width, heat pipe material, heat pipe number, and heat pipe temperature. The temperature rise test was carried out under different parameters such as shape, see Table 1 for the specific parameters, and Table 2 for the test results.

Table 1

Temperature rise tests were carried out on the batteries of Examples 1-6 respectively, and the test results are shown in Table 2.

Table 2

Although the embodiments of the present invention have been described in detail above, it is obvious for those skilled in the art that various modifications and changes can be made to these embodiments. However, it should be understood that such modifications and changes belong to the scope and spirit of the present invention described in the claims. Moreover, the invention described herein is capable of other embodiments and of being practiced or carried out in various ways.

Claims (10)

1. A battery, comprising:

a pole piece;

the heat pipe is arranged on the pole core and used for dissipating heat;

the heat pipe is of a plate-shaped structure, and the heat pipe is bonded with the pole core through heat conducting glue.

2. The battery of claim 1, wherein the number of pole cores is at least two, and the heat pipe is disposed between two adjacent pole cores.

3. The battery according to claim 2, wherein a plurality of the pole pieces are arranged in a first direction, and the heat pipe is disposed between two adjacent pole pieces at a center in the first direction.

4. The battery of claim 3, wherein a surface of the heat pipe coincides with a surface of the pole piece.

5. The battery of claim 2, further comprising a housing, wherein the end face of the heat pipe extends to the housing and coincides with a surface of the housing.

6. The battery of claim 5, wherein the heat pipe is T-shaped, the heat pipe comprising a horizontal portion and a vertical portion, a surface of the horizontal portion coinciding with a surface of the housing, and a surface of the vertical portion coinciding with a surface of the pole piece.

7. The battery of claim 1, wherein the pole piece includes a membrane, the heat pipe being bonded to the membrane.

8. The battery of claim 1, wherein the heat pipe surface is provided with an insulating coating, the material of the coating being thermally conductive.

9. The battery of claim 8, wherein the material of the insulating coating comprises any one of heat-conducting silicone grease, heat-conducting silicone gel, heat-conducting phase-change material, heat-conducting rubber and heat-conducting ceramic material.

10. The battery of claim 1, wherein the pole piece has a width W₁Thickness T of said pole piece₁The width W of the heat pipe is less than or equal to W₁-T₁。

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