CN103227297A - Finned single cell structure for electric automobile - Google Patents

Abstract

A rib-type single battery structure for electric vehicles, which is composed of electrodes, battery bases, bosses, and grooves. The side of the single battery case has bosses and grooves arranged in a staggered and parallel manner, and the bosses and grooves are aligned with the The bottom surface of the battery substrate forms an angle of 0°-90°, the ratio of the groove width to the boss width ranges from 1 to 5, and the boss width ranges from 2-10mm. The present invention enhances the disturbance when the heat exchange fluid flows through the gap between two single cells in the power battery pack through the structure design of the fin type single cells, improves the heat transfer coefficient, and at the same time makes the surface of the single cell shell ribbed When the coefficient is increased, the heat transfer area on the surface of the shell is greatly increased, which significantly increases the heat transfer effect, so that the single battery can quickly obtain heat dissipation or heating.

Description

A rib-type single battery structure for electric vehicles

technical field

It involves the field of power batteries for new energy vehicles, and specifically relates to the structure of a single battery for pure electric vehicles or hybrid vehicles.

Background technique

The key technology of electric vehicles is power batteries, and the performance of power batteries directly determines the future market prospects of electric vehicles. Since the power battery will release a large amount of heat during charging and discharging, the temperature of the battery pack will rise, which will directly affect the performance and life of the battery. If the temperature is too high, it may cause a safety accident; in addition, when the temperature is too low, It is also necessary to heat the power battery to improve its performance.

At present, most of the power batteries for electric vehicles developed on the market use air or liquid as the medium for heat dissipation and heating. The heat or cold heat transfer is mainly carried out through convective heat exchange or heat conduction between the medium and the surface of the battery. Most of the power battery structures used in electric vehicles are cuboids or cylinders, and the heat exchange surfaces are all flat sides. From the perspective of heat transfer, regular and flat heat transfer surface enhancement cannot effectively improve heat transfer, which is not conducive to the rapid heat dissipation and heating of electric vehicle power batteries.

Contents of the invention

The object of the present invention is to overcome the deficiencies of the prior art, and provide a finned single battery structure for electric vehicles with large heat dissipation area and high heat transfer coefficient.

The present invention adopts following technical scheme:

A rib-type single battery structure for electric vehicles, which is composed of electrodes, battery bases, bosses, and grooves, and is characterized in that: the side of the single battery case has bosses and grooves arranged in a staggered and parallel manner, and the bosses and grooves are arranged in parallel. The grooves form an angle of 0°-90° with the bottom surface of the battery base body.

The ratio of the width of the groove to the width of the boss ranges from 1 to 5, and the range of the width of the boss is 2-10mm.

Compared with the prior art, the ribbed single cell structure for electric vehicles has the following advantages:

(1) In the present invention, staggered and parallel bosses and grooves are arranged on the side of the single battery housing, and the single battery for electric vehicles is designed as a fin type. When forming a group, a plurality of rib-type single cells are arranged horizontally and in the same direction, and a small gap is left between the fin-type single cells. The fluid flows through the meandering channels formed by the staggered protrusions and grooves on the surface of the battery case on both sides of the battery case in the battery pack, which enhances the flow of the heat exchange fluid when it flows through the gap between two single cells in the power battery pack. The disturbance improves the heat transfer coefficient and strengthens the heat transfer effect.

(2) At the same time, through the fin-type structural design, the ribbing coefficient of the surface of the single battery shell is increased, the heat transfer area of the shell surface is greatly increased, and the heat transfer is also significantly increased, achieving the enhanced heat transfer. The purpose is to enable the single battery to quickly obtain heat dissipation or heating. .

Description of drawings

Fig. 1 is a perspective view of the structure of a rib-type single battery for an electric vehicle according to Embodiment 1 of the present invention.

Fig. 2 is a perspective view of a rib-type single battery module for an electric vehicle according to Embodiment 1 of the present invention.

Fig. 3 is a left side view of a rib-type single battery module for an electric vehicle according to Embodiment 1 of the present invention.

Fig. 4 is an assembly diagram of a rib-type single battery pack for an electric vehicle according to Embodiment 1 of the present invention.

5 is a perspective view of the structure of a rib-type single battery for an electric vehicle according to Embodiment 2 of the present invention.

Fig. 6 is a perspective view of a rib-type single battery module for an electric vehicle according to Embodiment 2 of the present invention.

Fig. 7 is a left side view of a rib-type single battery module for an electric vehicle according to Embodiment 2 of the present invention.

Fig. 8 is an assembly diagram of a rib-type single battery pack for an electric vehicle according to Embodiment 2 of the present invention.

9 is a perspective view of the structure of a rib-type single battery for an electric vehicle according to Embodiment 3 of the present invention.

Fig. 10 is a perspective view of a rib-type single battery module for an electric vehicle according to Embodiment 3 of the present invention.

Fig. 11 is a left side view of a rib-type single battery module for an electric vehicle according to Embodiment 3 of the present invention.

Fig. 12 is an assembly diagram of a rib-type single battery pack for an electric vehicle according to Embodiment 3 of the present invention.

In the figure, 1. electrode; 2. battery base; 3. boss; 4. groove; 5. electrode wiring; 6. battery box.

Detailed ways

Implementation column 1

A ribbed single cell structure for an electric vehicle, as shown in FIG. The side of the single battery housing has bosses 3 and grooves 4 arranged in parallel in a staggered manner. Both bosses 3 and grooves 4 form an angle of 0° to 90° with the bottom surface of the battery base 2, which is 30° in this embodiment.

The ratio of the width of the groove 4 to the width of the boss 3 ranges from 1 to 5, and 1 is taken in this embodiment, that is, the widths of the two are the same. The value range of the width of the boss 3 is 2-10mm, and the value in this embodiment is 4mm.

The shape of the rib-type single battery in this example is a cuboid. The bosses 3 and the grooves 4 are arranged on the two largest side surfaces of the cuboid, and the bosses 3 and the grooves 4 on both sides are arranged in dislocation.

In the assembly structure of the power battery of an electric vehicle, 2 to 10 single cells are neatly arranged horizontally to form a battery module, and are connected together through electrode wiring 5 to form a series connection, as shown in Figure 2 and Figure 3, the battery module of this embodiment The number of single cells is 5; the interval between the single cells in the battery module is 2-10 mm, and the interval in this embodiment is 5 mm. A plurality of battery modules are neatly arranged longitudinally to form a battery pack and placed in the battery case 6, as shown in FIG. 4, four battery modules are used in the battery pack in this embodiment.

During the use of the electric vehicle power battery, when the temperature is higher than a certain set temperature, such as 40 ° C, the heat dissipation mode is activated, and the cold air or liquid medium flows out through the tortuous channel of the single battery pack and takes away the heat of the battery . Due to the forced disturbance of the cooling medium by the staggered protrusions 3 and grooves 4 on the surface of the battery case, the disturbance of the heat exchange fluid flowing through the gap between two single batteries in the power battery pack is enhanced, the heat transfer coefficient is improved, and the the heat transfer effect. At the same time, through the fin-type structural design, the ribbing coefficient of the surface of the single battery case is increased, the heat transfer area of the case surface is greatly increased, and the heat transfer is also significantly increased, achieving the purpose of enhancing heat transfer.

If the temperature is lower than a certain set temperature during use, such as in winter, the temperature is lower than 0°C, the heating mode will be activated, and the hot air or liquid medium will flow out through the tortuous passage of the single battery pack and take away the power of the battery. heat. Similarly, the staggered protrusions 3 and grooves 4 on the surface of the battery case also form efficient heating, achieving the purpose of enhancing heat transfer, so that the single battery can quickly obtain heat dissipation or heating. .

Implementation column 2

In this embodiment, the staggered bosses 3 and grooves 4 on both sides of the single battery case form an angle of 90° with the bottom surface of the battery base 2 , as shown in FIGS. 5-8 . Others are the same as in Example 1. This embodiment is more suitable for the heat dissipation of the battery pack in the horizontal ventilation direction.

Example 3

In this embodiment, the staggered bosses 3 and grooves 4 on both sides of the battery case form an angle of 0° with the bottom surface of the battery base 2 , as shown in FIGS. 5-8 . Others are the same as in Example 1. This embodiment is more suitable for heat dissipation when the battery pack is in the vertical direction.

Claims (2)

1. A ribbed single battery structure for electric vehicles, consisting of electrodes (1), battery base (2), bosses (3), and grooves (4), characterized in that: the side of the single battery housing It has bosses (3) and grooves (4) arranged in a staggered parallel manner, and both the bosses (3) and the grooves (4) form an angle of 0° to 90° with the bottom surface of the battery base (2). 2. A ribbed single battery structure for electric vehicles according to claim 1, characterized in that the ratio of the width of the groove (4) to the width of the boss (3) ranges from 1 to 5, and the ratio of the width of the boss (3) is 1 to 5. The value range of the table (3) width is 2-10mm.

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