CN214378602U

CN214378602U - Integrated battery pack

Info

Publication number: CN214378602U
Application number: CN202120444184.6U
Authority: CN
Inventors: 夏循钊; 郭盛昌; 罗晶; 肖人漳
Original assignee: Chongqing Jinkang Power New Energy Co Ltd
Current assignee: Chongqing Jinkang Power New Energy Co Ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2021-10-08
Anticipated expiration: 2031-03-01

Abstract

The utility model belongs to the technical field of battery packs, in particular to an integrated battery pack, which comprises a battery module; the battery module comprises an electric core group formed by stacking electric cores along the front-back direction and side plates attached to two sides of the electric core group; and a liquid cooling runner for flowing of cooling liquid is arranged in the side plate. Adopt the technical scheme of the utility model, utilize the curb plate to electric core heat dissipation cooling, can save the liquid cooling board of current electric core bottom, reduce the component quantity in the battery package, alleviate the weight of battery package, simplify the structure, reduce cost improves energy density. And, compare in the liquid cooling board of current electric core bottom, the heat transfer area of curb plate and electric core is bigger than the heat transfer area of water cooling board and electric core, and the cooling electric core effect is better, and in addition, the curb plate links to each other with the outer frame of box, and the structural strength of box is higher.

Description

Integrated battery pack

Technical Field

The utility model relates to a battery package technical field, concretely relates to integrated form battery package.

Background

In the prior art, a box body, a module and a liquid cooling system of a part of battery packs are designed independently, the number and the variety of components in the battery packs are various, the cost is high, and the assembly procedures are multiple. The liquid cooling system integration of some battery packages is in battery module below, and the liquid cooling plate structure in the battery package exists alone, and the degree that the structure is simplified is low. And a part of battery packs integrates the liquid cooling plate at the bottom of the box body, and the scheme of integrating the liquid cooling plate at the bottom of the box body has no obvious effect on reducing the number of components and reducing the cost and has poor cooling effect.

In view of the above problems, it is urgently needed to develop a battery pack having a small number of components, a simple structure, a low cost, a good cooling effect, and a high energy density.

Disclosure of Invention

In view of this, the utility model aims at providing an integrated form battery package, battery package with the liquid cooling runner integrated to the curb plate of battery module to reduce the component quantity on the battery package, reduce the weight of battery package, retrench the structure, improve energy density, promote the cooling effect.

The scheme of the utility model is as follows:

an integrated battery pack including a battery module;

the battery module comprises an electric core group formed by stacking electric cores along the front-back direction and side plates attached to two sides of the electric core group;

and a liquid cooling runner for flowing of cooling liquid is arranged in the side plate.

Preferably, the side plate comprises an upper micro channel and a lower micro channel which are layered, and two ends of part of the micro channels are sealed to form the liquid cooling flow channel.

Preferably, the cross section of the side plate is in a shape of Chinese character 'mu', and three layers of micro-channels which are layered up and down are formed in the side plate; and two ends of the micro channel positioned in the middle layer are sealed to form the liquid cooling flow channel.

Preferably, the bottom of the side plate is provided with a support plate.

Preferably, the side plates are made of hollow aluminum profiles.

Preferably, the battery module is further provided with end plates arranged on the front end face and the rear end face of the electric core group, and two ends of each end plate are fixed with the side plates.

Preferably, the battery pack further comprises a case body, and the case body comprises an outer frame; and two ends of the side plate are fixed with the outer frame.

Preferably, the end of the side plate is fixed to the outer frame by an angle-shaped adapter plate.

Preferably, the box body further comprises a bottom plate fixed at the bottom of the outer frame, and a heat insulation piece is arranged between the outer frame and the bottom plate.

Preferably, both ends of the side plate are connected with liquid cooling pipes; the liquid cooling pipe is communicated with the liquid cooling runner in the side plate; the liquid cooling pipe at one end of the side plate supplies cooling liquid for the liquid cooling flow channel, and the liquid cooling pipe at the other end of the side plate supplies the cooling liquid in the liquid cooling flow channel to be discharged.

Adopt the technical scheme of the utility model, in locating the curb plate with the liquid cooling runner, utilize the curb plate to electric core heat dissipation cooling, can save the liquid cooling board of current electric core bottom, reduce the component quantity in the battery package, alleviate the weight of battery package, simplify the structure, reduce cost improves energy density. And, compare in the liquid cooling board of current electric core bottom, the heat transfer area of curb plate and electric core is bigger than the heat transfer area of water cooling board and electric core, and the cooling electric core effect is better, and in addition, the curb plate links to each other with the outer frame of box, and the structural strength of box is higher.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional structural schematic view of a side panel;

FIG. 3 is a schematic structural view of an end face of a side plate;

in the figure, a box body 1, an outer frame 11, a bottom plate 12, a battery cell 2, a side plate 3, a micro-channel 31, a liquid cooling flow channel 32, a support plate 33, an end plate 4, an adapter plate 5 and a liquid cooling pipe 6 are arranged.

Detailed Description

The following is further detailed by the specific embodiments:

as shown in fig. 1, an integrated battery pack includes a case 1 and a battery module. The case 1 includes a bottom plate 12 and an outer frame 11. The bottom plate 12 is fixed with the outer frame 11 and the side plates 3 by rivets or screws, so that the box body 1 has a simple structure. The battery module comprises an end plate 4, a side plate 3 and a battery core group.

The electric core 2 in this embodiment is regular square, and a plurality of electric cores 2 are stacked in the front-back direction to form an electric core group. The end plates 4 are arranged on the front and rear end faces of the cell pack in the direction in which the cells 2 are stacked, and the end plates 4 clamp the plurality of cells 2 from the front and rear direction. Both sides of electric core group are located along the direction that perpendicular to electric core 2 range upon range of stack to curb plate 3, and a plurality of electric cores 2 are retrained from the side to curb plate 3. Curb plate 3 and end plate 4 mutually support, and a plurality of electric cores 2 in the electric core group are fixed.

In this embodiment, the side plate 3 has a liquid cooling flow passage 32 for the cooling liquid to flow into, and the cooling liquid flows through the liquid cooling flow passage 32 inside the side plate 3, so that both side surfaces of the electric core 2 are cooled by the side plate 3. Utilize curb plate 3 to electric core 2 heat dissipation cooling, can save the liquid cooling plate of current electric core 2 bottoms, reduce the component quantity in the battery package, alleviate the weight of battery package, simplify the structure, reduce cost improves energy density. And, compare in the liquid cold plate of current 2 bottoms of electric core, two curb plates 3 and two side contacts of electric core 2, the heat transfer area of curb plate 3 and electric core 2 is bigger than the heat transfer area of water cold plate and electric core 2, and the effect of adopting two curb plates 3 to cool off electric core 2 is better, and electric core 2 is more even in the ascending temperature of vertical side.

The side plate 3 in this embodiment is preferably made of 6-series aluminum material, particularly No. 6005 or No. 6061 aluminum material, which has high structural strength, good corrosion resistance and cold workability, and is provided with the liquid cooling flow passage 32. However, the cavity in the side plate 3 is large, and the side plate 3 contains too much coolant, which results in a heavy battery pack and is not favorable for reducing the weight of the battery pack. In order to reduce the weight of the battery pack, the side plate 3 is internally provided with the upper and lower layered micro-channels 31, part of the micro-channels 31 are sealed on the end face of the side plate 3, the sealed micro-channels 31 form the liquid cooling flow channel 32, the liquid cooling flow channels with two sealed ends prevent cooling liquid from leaking from two end faces of the side plate 3, and the tightness is ensured. The cooling liquid in the liquid cooling flow passage 32 can meet the requirement of cooling the electric core 2, and meanwhile, the weight of the battery pack is prevented from being overlarge.

As shown in fig. 2 and fig. 3, the cross section of the side plate 3 is in a shape of a Chinese character mu, three layers of microchannels 31 layered up and down are arranged in the side plate 3, and the microchannels 31 located in the middle layer are sealed on two end surfaces of the side plate 3 by arc welding, so that the sealed microchannels 31 form liquid cooling flow passages 32. The bottom of the side plate 3 is further provided with a support plate 33 to increase the contact area between the side plate 3 and the bottom plate 12, so that the side plate 3 is kept stable.

In this embodiment, the both sides face of electric core 2 is beaten and is glued to paste and establish on the curb plate 3 of electric core 2 both sides, end plate 4 is located between the curb plate 3 of both sides, and the both ends of end plate 4 are fixed with curb plate 3 through the welded mode, can reduce the quantity of connecting piece, help the lightweight of battery package.

In order to ensure that the side plate 3 is firmly installed, two ends of the side plate 3 are fixed with the outer frame 11 through the angle-shaped adapter plate 5; each end of curb plate 3 is equipped with two keysets 5, and one angle profile of keysets 5 rivets with curb plate 3, and another angle profile rivets with the inner wall of frame, and the both ends of curb plate 3 are fixed with outer frame 11, and curb plate 3 can act as the crossbeam in outer frame 11, improves outer frame 11's structural strength.

Because the temperature of electric core 2 receives curb plate 3 control, if the coefficient of heat conductivity between electric core 2 and the box 1 is high, electric core 2 receives ambient temperature's influence easily. In a low-temperature environment, the heat preservation effect of the battery pack is poor; in a high temperature environment, the cooling effect of the battery pack is poor. The side plate 3 in this embodiment is connected with the outer frame 11 through the adapter plate 5, the contact area between the adapter plate 5 and the outer frame 11 is small, the thermal conductivity coefficient is low, and the influence of the environmental temperature on the battery cell 2 is favorably reduced. In order to further reduce the thermal conductivity between the battery cell 2 and the case 1, a thermal insulation member is disposed between the bottom plate 12 and the outer frame 11.

In this embodiment, the two ends of the side plate 3 are connected with the liquid cooling pipes 6 through the quick-connect plugs, the liquid cooling pipes 6 are communicated with the liquid cooling flow passages 32 in the side plate 3, the liquid cooling pipes 6 at one end of the side plate 3 are used for cooling liquid to flow into the side plate 3, and the liquid cooling pipes 6 at the other end of the side plate 3 are used for cooling liquid to flow out of the side plate 3.

As shown in fig. 1, the battery pack is composed of twelve groups of electric core groups, twelve groups of electric core groups are distributed in two rows in a direction parallel to the side plate 3, and six rows are distributed in a direction perpendicular to the side plate 3. In the actual production process, the number of the electric core groups can be adjusted according to the actual requirement. In the battery pack of this embodiment, the side plate 3 located between two adjacent rows of electric core groups can cool the two rows of electric core groups simultaneously, can reduce the number of components in the battery pack, contributes to the lightweight of the battery pack, and improves the energy density of the battery pack.

The cooling liquid in this embodiment is from the liquid cooling pipe 6 reposition of redundant personnel to a plurality of curb plates 3 of 3 one ends of curb plate earlier, and after the liquid cooling runner 32 in the curb plate 3 was flowed through to the cooling liquid in the liquid cooling pipe 6 of the 3 other ends of curb plate, guaranteed that the cooling liquid can flow through every row of electricity core 2 with the shortest path, and the cooling effect is good.

When assembling the battery pack, firstly gluing two side surfaces of the electric core 2 and fixing the two side plates 3; then, end plates 4 are arranged on the front end surface and the rear end surface of the electric core group, two ends of each end plate 4 are welded on the side plates 3, and the end plates 4 are utilized to tightly press the plurality of electric cores 2 in the electric core group, so that the electric core group is firmly fixed; the assembled cell pack, end plates 4 and side plates 3 are then hoisted into the box 1. The fixing process of the battery cell 2 can be performed outside the box body 1, the operation space is large, and the installation is convenient.

Compared with the traditional battery pack, the battery pack in the embodiment reduces the liquid cooling plate, accessories, partial fasteners and partial switching bus bars, reduces the number of components by 20-30%, and reduces the cost by about 20%. The weight energy density of the battery pack is improved by 10-15%, and the volume energy density is improved by about 10%. The side plate 3, the bus bar and the liquid cooling pipe 6 of the battery pack can be universal, and the generalization rate of parts is improved by 15-20%. The thermal management efficiency of the battery pack is improved by 5%, and the assembly efficiency is improved by 10%.

The invention is not limited solely to that described in the specification and the embodiments, and additional advantages and modifications will readily occur to those skilled in the art, and it is not intended to be limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.

Claims

1. An integrated battery pack including a battery module; the battery module comprises an electric core group formed by stacking electric cores along the front-back direction and side plates attached to two sides of the electric core group;

the method is characterized in that:

2. The integrated battery pack of claim 1, wherein: the side plate comprises upper and lower layered micro channels, and two ends of each micro channel are sealed to form the liquid cooling flow channel.

3. The integrated battery pack according to claim 2, wherein: the cross section of the side plate is in a shape of Chinese character 'mu', and three layers of micro-channels which are layered up and down are formed in the side plate; and two ends of the micro channel positioned in the middle layer are sealed to form the liquid cooling flow channel.

4. The integrated battery pack of claim 3, wherein: the bottom of the side plate is provided with a supporting plate.

5. The integrated battery pack of claim 4, wherein: the side plates are made of hollow aluminum profiles.

6. The integrated battery pack according to claim 4 or 5, wherein: the battery module is still including locating the end plate on the terminal surface around the electric core group, the both ends of end plate with the curb plate is fixed.

7. The integrated battery pack of claim 6, wherein: the battery pack further comprises a box body, and the box body comprises an outer frame; and two ends of the side plate are fixed with the outer frame.

8. The integrated battery pack of claim 7, wherein: the end part of the side plate is fixed on the outer frame through an angle-shaped adapter plate.

9. The integrated battery pack of claim 8, wherein: the box body further comprises a bottom plate fixed to the bottom of the outer frame, and a heat insulation piece is arranged between the outer frame and the bottom plate.

10. The integrated battery pack of claim 9, wherein: the two ends of the side plate are both connected with liquid cooling pipes, and the liquid cooling pipes are communicated with the liquid cooling flow passages in the side plate; the liquid cooling pipe at one end of the side plate supplies cooling liquid for the liquid cooling flow channel, and the liquid cooling pipe at the other end of the side plate supplies the cooling liquid in the liquid cooling flow channel to be discharged.