CN210167396U

CN210167396U - Battery pack for electric automobile

Info

Publication number: CN210167396U
Application number: CN201920737280.2U
Authority: CN
Inventors: 赵振东
Original assignee: Nanjing Institute of Technology
Current assignee: Nanjing Institute of Technology
Priority date: 2019-05-22
Filing date: 2019-05-22
Publication date: 2020-03-20
Anticipated expiration: 2029-05-22

Abstract

The utility model discloses a battery pack for an electric automobile, which comprises a fan, an air guide cover and a battery pack, wherein an air outlet of the fan is connected with one end of the air guide cover, the other end of the air guide cover is connected with the battery pack, the battery pack comprises a plurality of electric core shells which are arranged in parallel, and an electric core is arranged in each electric core shell; the electric core shell is equipped with four sides and two arc boards that are used for connecting electric core, the surface of arc board is equipped with a plurality of heat dissipation wings, two arc boards set up relatively, every side all includes flange one, flange two and set up in flange one, the electric core shell recess between flange two, the width of flange one equals the width of flange two, the width of electric core shell recess equals the width of flange one plus the width of flange two, one connection is in the electric core shell recess through groove connection board in the arc board both ends, flange one is equipped with the breach, flange two is equipped with the arch that is used for connecting the breach. The utility model discloses can be abundant reasonable utilize limited battery package space, the radiating effect preferred can release unnecessary electric core swell through the clearance.

Description

Battery pack for electric automobile

Technical Field

The utility model relates to a battery pack for electric automobile belongs to electric automobile battery technical field.

Background

The battery pack is one of the core components of the electric automobile and is also one of the important components which currently restrict the development of the electric automobile. At present, the capacity of the battery pack directly determines the driving range of the electric vehicle. At the present stage, on the premise that the lithium battery technology is not improved qualitatively, one of the important ways of improving the endurance mileage of the electric vehicle is to increase the charging speed, but the harm caused by increasing the charging speed is to generate heat of the battery core.

At present, a relatively mature 18650 electric core is generally adopted by an electric automobile, and research shows that the electric core is easy to explode under the condition of instant heating (generally caused by instant current increase). There is therefore a need in the art for a more secure battery assembly that prevents multiple cells.

SUMMERY OF THE UTILITY MODEL

For solving the not enough of prior art, the utility model aims to provide a battery pack for electric automobile.

In order to achieve the above object, the utility model adopts the following technical scheme:

a battery assembly for an electric automobile is characterized by comprising a fan, an air guide cover and a battery pack, wherein an air outlet of the fan is connected with one end of the air guide cover, the other end of the air guide cover is connected with the battery pack, the battery pack comprises a plurality of electric core shells which are arranged in parallel, and an electric core is arranged in each electric core shell;

the electric core shell is provided with four side edges and two arc plates used for connecting the electric core, the outer surface of each arc plate is provided with a plurality of heat dissipation fins, the two arc plates are arranged oppositely, each side edge comprises a first flange, a second flange and an electric core shell groove arranged between the first flange and the second flange, the width of the first flange is equal to the width of the second flange, the width of the electric core shell groove is equal to the width of the first flange and the width of the second flange, the two ends of each arc plate are connected to the electric core shell groove through groove connecting plates, the first flange is provided with a notch, and the second flange is provided with a protrusion used for connecting the notch.

Preferably, in the battery pack for an electric vehicle, a width of the notch is equal to a length of the protrusion, and a length of the notch is not less than the length of the protrusion.

Preferably, in the battery pack for an electric vehicle, the plurality of heat dissipation fins are arranged along the outer surface of the arc plate at equal intervals.

Preferably, in the battery pack for an electric vehicle, an axis of the heat dissipation fin is parallel to an axis of the arc plate.

Preferably, in the battery pack for an electric vehicle, the arc plate is further connected to the core case groove through a groove connecting plate two.

Preferably, in the battery pack for an electric vehicle, there are two groove connection plates.

Preferably, in the battery pack for an electric vehicle, an end of the arc plate is further provided with an oblique piece.

Preferably, in the battery pack for an electric vehicle, an end of the oblique piece is not higher than the side edge.

Preferably, in the battery pack for an electric vehicle, the material of the core case is an aluminum alloy.

The utility model discloses the beneficial effect who reaches:

the utility model relates to an ingenious, equipment is convenient, after a plurality of electric core shells 3 are placed side by side, can be abundant reasonable utilize limited battery package space, when electric core emergence swell, can be through 3 inside and adjacent electric core shells 3 between the clearance release unnecessary electric core, avoid exploding. The utility model discloses can increase the radiating effect of electric core, the probability of explosion when reducing the core swell avoids electric core swell to influence other electric cores simultaneously.

Drawings

FIG. 1 is a front view of the overall structure of the present invention;

fig. 2 is a top view of the electrical core shell of the present invention;

FIG. 3 is a top view of the connection of multiple electrical core shells according to the present invention;

figure 4 is a cross-sectional view of P-P of figure 2 according to the present invention;

fig. 5 is a diagram of the deformation state of the cell casing in the cell bulge state of the present invention;

the meaning of the reference symbols in the figures: 1-a fan; 2-wind cover; 3-an electrical core shell; 4-first rib; 5-electrical core shell groove; 6-second rib; 7-arc plate; 41-notch; 61-projection; 71-radiating fins; 72-groove connecting plate I; 73-a second groove connecting plate; 74-oblique piece.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1 and 2: the embodiment discloses a battery pack for electric automobile, including fan 1, wind scooper 2 and battery package, the one end of wind scooper 2 is connected to the air outlet of fan 1, and the battery package is connected to the other end of wind scooper 2, and the battery package includes a plurality of parallel arrangement's electric core shell 3, is equipped with electric core in the electric core shell 3.

The electric core shell 3 is provided with four side edges and two arc plates 7 used for connecting the electric core, the outer surface of the arc plates 7 is provided with a plurality of radiating fins 71, and the two arc plates 7 are oppositely arranged to form a cavity used for accommodating 18650 electric cores. Specifically, every side all includes flange one 4, flange two 6 and sets up in flange one 4, electric core shell recess 5 between flange two 6, the width A of flange one 4 is equal to the width A of flange two 6, the width B of electric core shell recess 5 equals the width of flange one 4 plus the width of flange two 6, arc 7 both ends are connected in electric core shell recess 5 through groove connection board 72, flange one 4 is equipped with breach 41, flange two 6 are equipped with the arch 61 that is used for connecting breach 41.

Specifically, the width of the notch 41 is equal to the width of the protrusion 61, and the length of the notch 41 is not less than the length of the protrusion 61, so that the notch 41 can completely accommodate the protrusion 61.

The number of the heat dissipation fins 71 in this embodiment is plural, and the plural heat dissipation fins 71 are equidistantly distributed along the outer surface of the arc plate 7. In order to increase the air flow passing capacity of the electric core case 4 and reduce the wind resistance of the cooling air flow, the axis of the heat dissipation fins 71 of the present embodiment is parallel to the axis of the arc plate 7.

In particular, in order to increase the connection strength between the arc plate 7 and the side edge, the two are prevented from being separated. The arc plate 7 is also connected to the electric core shell groove 5 through a second groove connecting plate 73, and preferably two groove connecting plates 73 are provided.

With reference to fig. 2 and 4: the end of the arc plate 7 is also provided with a bevel tab 74. The ramp 74 corresponds to the addition of two larger chamfers to the ends of the two arc plates 7. Play the effect of direction when being used for installing electric core, reduce the installation degree of difficulty of electric core and two arc boards 7, the tip of oblique piece 74 is not higher than the side at best, like this when multilayer electricity core shell 3 stacks the setting, just can avoid the height that oblique piece 74 increases single electricity core shell 3, makes the tip of multilayer electricity core shell 3 realize hugging closely.

The material of the electric core case 3 of the present embodiment is preferably an aluminum alloy.

When the combined type battery core shell is used, a single 18650 battery core is installed between the two arc plates 7, and then a plurality of battery core shells 3 after the battery core is installed are combined in a specific combination mode as shown in fig. 3, because the end part of the groove 5 of the battery core shell is equal to the width of the first rib 4 or twice the width of the second rib 6, and the width of the first rib 4 is equal to the width of the second rib 6. Therefore, when a plurality of electric core shells 3 are placed side by side, the first rib 4 and the second rib 6 of the connected electric core shell 3 can be just placed inside the electric core shell groove 5, and the adjacent gap 41 and the protrusion 61 can further increase the tightness of the fit of the adjacent electric core shell 3.

Under normal process state, arc board 7 can closely laminate electric core, and consequently the heat that electric core produced can transmit to heat dissipation wing 71 through arc board 7, and the air current that fan 1 produced can enter into the clearance between side and the arc board through wind scooper 2, dispels the heat to arc board 7 and heat dissipation wing 71, effectively reduces the temperature of electric core. In the process, the second groove connecting plate 73 and the first groove connecting plate 72 can also play a certain role in heat dissipation.

Referring to fig. 3 and 5, when the battery cell bulges, the battery cell extrudes the arc plate 7 outwards, and the arc plate 7 extrudes the battery cell casing groove 5 through the groove connecting plate two 73 and the groove connecting plate one 72. When the core cases 3 are assembled in the manner of fig. 3, a rectangular space is formed between adjacent core cases 3 through the core case groove 5 in the horizontal direction of the view of fig. 3, and the rectangular space can accommodate the increase in the lateral dimension caused by the cell bulge. In the vertical direction, because the space between the first flange 4 and the second flange 6 at the corner is larger, the first flange 4 and the second flange 6 which are connected with the electric core shell groove 5 at the side edges can be extruded by the electric core shell groove 5, so that the electric core shell groove is deformed and is used for accommodating the increase of the vertical size caused by the electric core bulge. In the actual course of working, the critical force that electric core shell 3 was extruded by electric core is controlled to the mode of 3 thickness of accessible control electric core shell, can't make the phenomenon that electric core shell 3 warp when avoiding electric core swell.

The utility model relates to an ingenious, equipment is convenient, after a plurality of electric core shells 3 are placed side by side, can be abundant reasonable utilize limited battery package space, when the bulge takes place for electric core, can release unnecessary electric core (because of the volume of the electric core that the bulge increases) through the clearance between 3 inside and adjacent electric core shells of electric core shell, avoid exploding. The utility model discloses can increase the radiating effect of electric core, the probability of explosion when reducing the core swell avoids electric core swell to influence other electric cores simultaneously.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.

Claims

1. The battery assembly for the electric automobile is characterized by comprising a fan (1), an air guide cover (2) and a battery pack, wherein an air outlet of the fan (1) is connected with one end of the air guide cover (2), the other end of the air guide cover (2) is connected with the battery pack, the battery pack comprises a plurality of electric core shells (3) which are arranged in parallel, and electric cores are arranged in the electric core shells (3);

electricity core shell (3) are equipped with four sides and two arc boards (7) that are used for connecting the electric core, the surface of arc board (7) is equipped with a plurality of heat dissipation wings (71), and two arc boards (7) set up relatively, and every side all includes flange one (4), flange two (6) and sets up in electric core shell recess (5) between flange one (4), flange two (6), the width of flange one (4) equals the width of flange two (6), the width of electric core shell recess (5) equals the width of flange one (4) plus the width of flange two (6), connect in electric core shell recess (5) through groove connection board one (72) in arc board (7) both ends, flange one (4) are equipped with breach (41), flange two (6) are equipped with arch (61) that are used for connecting breach (41).

2. The battery pack for the electric vehicle as set forth in claim 1, wherein the width of the notch (41) is equal to the projection (61), and the length of the notch (41) is not less than the length of the projection (61).

3. The battery pack for the electric vehicle as claimed in claim 1, wherein the heat dissipating fins (71) are plural, and the plural heat dissipating fins (71) are equally spaced along the outer surface of the arc plate (7).

4. A battery pack for an electric vehicle according to claim 1 or 3, wherein the axis of the heat dissipating fin (71) is parallel to the axis of the arc plate (7).

5. The battery pack for the electric vehicle as claimed in claim 1, wherein the arc plate (7) is further connected to the core case groove (5) through a groove connecting plate two (73).

6. The battery pack for the electric vehicle as set forth in claim 5, wherein there are two of said second groove connecting plates (73).

7. The battery pack for the electric vehicle as claimed in claim 1, wherein the end of the arc plate (7) is further provided with a ramp (74).

8. The battery pack for an electric vehicle as claimed in claim 7, wherein the end of the inclined piece (74) is not higher than the side edge.

9. The battery pack for electric vehicle as claimed in claim 1, wherein the material of the core case (3) is aluminum alloy.