CN210984780U

CN210984780U - Lithium ion battery for electric automobile

Info

Publication number: CN210984780U
Application number: CN201921573706.1U
Authority: CN
Inventors: 吴晓东
Original assignee: Individual
Current assignee: Weishan Technology Co ltd
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2020-07-10
Anticipated expiration: 2029-09-20

Abstract

The utility model is suitable for a lithium ion battery field provides a lithium ion battery for electric automobile, including electric core (3), heat preservation (2), heating member (4), electric connecting wire (5), electrode (6) and casing. The heating body (4) is packaged in the position, close to the electric core, of the interior of the battery, the electric core is directly contacted with the heating body, the heating rate of the battery can be obviously improved, and the heat-insulating layer (2) is arranged outside the heating body to reduce heat dissipation, so that the heating efficiency is further improved; and a temperature adjusting layer made of phase change materials is arranged on the battery shell, so that the phase change materials absorb heat to heat the battery for heat dissipation when the temperature of the battery is overhigh, and the phase change materials release heat when the temperature of the battery is lower than a certain value to keep the temperature of the battery. Meanwhile, a reasonable heat dissipation structure is further arranged, so that normal use of the battery in high and low temperature environments is guaranteed.

Description

Lithium ion battery for electric automobile

Technical Field

The utility model relates to a lithium ion battery, especially a lithium ion battery for electric automobile.

Background

With the rapid development of electric vehicles, it is a big problem to be considered in the field whether a battery system as a power source of the electric vehicle can provide continuous power for the electric vehicle under different working conditions.

As is known, the performance of the lithium ion battery is very susceptible to the influence of the ambient temperature, and too high or too low temperature can greatly affect the performance of the lithium ion battery. Patent CN204375854U discloses a lithium battery for an electric vehicle, which mainly discloses a heat dissipation structure for dissipating heat of the lithium battery. However, the lithium battery cannot be charged even at low temperature, and the discharge capacity of the lithium battery is greatly reduced, so that the working performance of the lithium battery is unstable, and even the service life of the lithium battery is seriously influenced. Under the condition, many researchers add heating elements around the battery, such as CN209329111U and CN209150273U, which are attached with a heating film around the battery, and JP2013145689A is provided with a peltier device on one side of the battery, and these heating elements are all disposed around the battery, so that the battery is heated, and at the same time, the energy dissipation is relatively serious, the heating efficiency is low, and the energy consumption is large. Therefore, it is required to provide a method for rapidly and efficiently heating a battery to a suitable temperature, and a battery using the heating method, and also to be capable of effectively dissipating heat, thereby satisfying the needs of an electric vehicle.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lithium ion battery for electric automobile can be suitable for the battery to use under high low temperature environment, including the inside heating structure of battery and outlying heat radiation structure.

Concretely, lithium ion battery for electric automobile, including battery case and the inside lithium cell of installation battery case, its characterized in that: the heat dissipation plate is composed of a planar substrate, heat dissipation rib plates and T-shaped insertion blocks, the planar substrate, the heat dissipation rib plates and the T-shaped insertion blocks are of an integrated structure made of aluminum, the heat dissipation rib plates are evenly distributed on the planar substrate, and the T-shaped insertion blocks are arranged on the lower portion of the planar substrate; the battery shell is a cuboid, T-shaped slots are formed in four side faces of the battery shell, and the radiating plate is assembled on the four side faces of the battery shell through the T-shaped inserting blocks and the T-shaped slots which are matched with each other; and a heat conduction silica gel layer is filled between the inner surface of the battery shell and the outer surface of the lithium battery unit.

Further, the lithium battery further comprises an electric core 3, a heat preservation layer 2, a heating body 4, an electric connection wire 5, an electrode 6 and a shell. The heating body 4 is packaged inside the battery and tightly attached to the battery core, so that the heating efficiency of the heating body can be increased.

In some embodiments, the heating body may be a heating film, a heating sheet, or the like, and is connected to and encapsulated together with the conductive wire, and the encapsulating material is preferably a high thermal conductivity type epoxy resin.

Further, a temperature adjusting layer composed of a phase change material is disposed on the inner surface of the case, and the phase change material is selected according to the kind of the battery.

Drawings

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

Fig. 1 is a structural diagram of a lithium ion battery according to the present invention.

Fig. 2 is a structural view of the heating body of the present invention.

Detailed Description

The following description provides many different embodiments, or examples, for implementing different features of the invention. The particular examples set forth below are illustrative only and are not intended to be limiting.

A lithium battery for an electric automobile comprises a battery shell, a lithium battery unit and a heat dissipation plate, wherein the lithium battery unit is arranged in the battery shell, the heat dissipation plate is composed of a planar substrate, heat dissipation rib plates and T-shaped insertion blocks, the planar substrate, the heat dissipation rib plates and the T-shaped insertion blocks are of an integrated structure made of aluminum, the heat dissipation rib plates are uniformly distributed on the planar substrate, and the T-shaped insertion blocks are arranged on the lower portion of the planar substrate; the battery shell is a cuboid, T-shaped slots are formed in four side faces of the battery shell, and the radiating plate is assembled on the four side faces of the battery shell through the T-shaped inserting blocks and the T-shaped slots which are matched with each other.

As shown in fig. 1, the lithium ion battery further includes a battery cell 3, a heat insulating layer 2, a heating body 4, an electrical connection wire 5, an electrode 6, and a casing. The heating bodies 4 are packaged in the battery and are tightly attached to the positions of the battery core, a plurality of heating bodies 4 can be selected to be connected in series, in parallel or in series and parallel, and are arranged at different positions on the surface of the battery core, for example, (1) the heating bodies are uniformly distributed on the surface of the battery core or between the battery core and the battery core; (2) distributed on the surface of the cell or between cells in a specific density change, which may be a gradual decrease in density from the center of the cell to the edge. Because electric core is direct to be contacted with the heating member, can show the rate of heating that improves the battery to set up heat preservation 2 in the outside of heating member, with the dissipation that reduces the heat, thereby further improve heating efficiency.

Furthermore, a temperature adjusting layer made of phase change materials is arranged on the battery shell, appropriate phase change materials are selected according to the type of the battery, the phase change temperature of the phase change materials is set at the highest temperature value of the appropriate temperature range of the battery, so that the phase change temperature of the phase change materials is reached when the temperature of the battery exceeds a certain threshold value, and the phase change materials absorb heat to accelerate the heat dissipation of the battery; when the temperature of the battery is reduced, the phase change material releases heat to maintain the temperature of the battery, thereby achieving the effect of regulating the temperature of the battery.

As shown in fig. 2, the heating body 4 may be a heating film, a heating sheet, etc., and the heating body 4 is connected to an electric wire 5 and encapsulated with an electronic packaging material, while two electrodes 6 are provided to protrude out of the battery case to obtain power from an external power source to heat the battery 1. Of course, the two electrodes 6 may also be connected to the electrode terminals of the battery cell 3 through a switch, and the battery 1 is self-powered to heat the battery cell 3 through the control of the switch.

The electronic packaging material can be high-thermal-conductivity epoxy resin.

The utility model discloses a lithium ion battery for electric automobile, set up the heat radiation structure and through directly encapsulating the heating member in the inside of battery, directly contact with electric core and improve the rate of heating of battery; the dissipation of insulation construction in order to reduce the battery internal energy has been set up, density and/or arrangement mode through rationally setting up the heating member between electric core surface or electric core and electric core effectively promote rate of heating, make this battery can increase self temperature to suitable temperature fast under low temperature environment, and set up the temperature regulation layer of constituteing by phase change material on battery case, dispel the heat by phase change material heat absorption heating battery when the battery temperature is too high, it is exothermic by phase change material when the battery temperature is less than a definite value, in order to keep the temperature of battery, thereby make its performance that exerts normally. Therefore, the lithium ion battery for the electric automobile is suitable for being used in high and low temperature environments for the electric automobile, and the practical performance of the lithium ion battery is effectively improved.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A lithium ion battery for an electric automobile comprises a heat dissipation plate, wherein the heat dissipation plate is composed of a planar substrate, heat dissipation rib plates and T-shaped insertion blocks, the planar substrate, the heat dissipation rib plates and the T-shaped insertion blocks are of an integrated structure made of aluminum, the heat dissipation rib plates are uniformly distributed on the planar substrate, and the T-shaped insertion blocks are arranged on the lower portion of the planar substrate; the battery shell is a cuboid, T-shaped slots are formed in four side faces of the battery shell, and the radiating plate is assembled on the four side faces of the battery shell through the T-shaped inserting blocks and the T-shaped slots which are matched with each other; the method is characterized in that: the lithium ion battery (1) comprises an electric core (3), a heat preservation layer (2), a heating body (4), an electric connection wire (5), an electrode (6) and a shell, wherein the heating body (4) and the electric connection wire (5) are packaged by adopting an electronic packaging material, and then the heating body (4) is integrated in the heat preservation layer (2) of the lithium ion battery and is tightly attached to the electric core (3); the temperature adjusting layer composed of phase change materials is arranged on the inner surface of the shell, the phase change materials are selected according to the type of the lithium ion battery, and the phase change temperature of the phase change materials is set at the highest temperature value in the suitable temperature range of the battery.

2. The lithium ion battery according to claim 1, characterized in that the heating body (4) is uniformly distributed on the surface of the cell or between the cells.

3. The lithium ion battery according to claim 1, characterized in that the heating body (4) is distributed on the surface of the cell or between the cells in a specific density variation.

4. The lithium ion battery of claim 3, wherein the specific density variation is a gradual decrease from the center of the cell to the edge of the cell.

5. The lithium ion battery according to claim 1, characterized in that the electrodes (6) extend out of the battery case and are connected to an external power supply.

6. The lithium ion battery according to claim 1, characterized in that the electrode (6) is connected to the electrode of the cell (3) by means of a switch.