CN219917381U

CN219917381U - Battery pack and power utilization device

Info

Publication number: CN219917381U
Application number: CN202320898465.8U
Authority: CN
Inventors: 尚雪莉; 王帅锋; 季娟
Original assignee: China Innovation Aviation Technology Group Co ltd
Current assignee: China Innovation Aviation Technology Group Co ltd
Priority date: 2023-04-20
Filing date: 2023-04-20
Publication date: 2023-10-27
Anticipated expiration: 2033-04-20

Abstract

The utility model discloses a battery pack and an electricity utilization device, wherein the battery pack comprises a plurality of brackets and a plurality of battery packs, each battery pack is correspondingly arranged on each bracket one by one, and the battery is managed in a blocking way; the adjacent two battery columns on the adjacent two brackets are a first battery column and a second battery column respectively, and a first accommodating space is arranged between the adjacent two single batteries in the first battery column, a second accommodating space is arranged between the adjacent two single batteries in the second battery column, and the single batteries in the second battery column are partially projected on the brackets of the first battery column, so that parts of the single batteries in the first battery column and the second battery column can be embedded into the opposite accommodating spaces during assembly, the accommodating spaces not only can position the assembly of the single batteries, so that the splicing of a plurality of battery packs is more efficient, but also the assembly space can be reasonably utilized, and the battery energy density is improved. The power utilization device comprises the battery pack, so that the battery energy density of the power utilization device is improved.

Description

Battery pack and power utilization device

Technical Field

The utility model relates to the technical field of power batteries, in particular to a battery pack and an electric device.

Background

With the development of social economy, the use requirement of the battery is larger and larger, and how to obtain market advantages in industry is important to improving the production economic benefit of the battery. The battery is assembled as a part of the battery production process, and the situation of wrong installation easily occurs in the battery packaging process, so that the battery pack fails and cannot be produced smoothly, and what measures are taken to efficiently install the battery into the box is more and more important.

At present, the fool-proof measures of the battery installation process are mainly realized by additionally arranging a fool-proof structure in the box body, and from the perspective of battery energy density, the additionally arranged fool-proof structure occupies the capacity space of the battery in the box body, reduces the battery energy density and can not well improve the economic benefit of the battery.

Disclosure of Invention

In order to overcome the defects in the prior art, one of the purposes of the utility model is to provide a battery pack which can realize battery block management and achieve the purpose of high efficiency of battery assembly on the premise of not occupying battery space.

The second object of the present utility model is to provide an electric device, which uses a battery pack to achieve the purpose of providing battery energy density.

One of the purposes of the utility model is realized by adopting the following technical scheme:

a battery pack, comprising:

a plurality of brackets arranged side by side along a first direction;

a plurality of battery packs, each of which is mounted to each of the brackets in a one-to-one correspondence;

each battery pack comprises at least two battery columns arranged along the first direction, each battery column comprises a plurality of single batteries arranged along the second direction, and the first direction is perpendicular to the second direction;

two adjacent battery columns on two adjacent brackets are a first battery column and a second battery column respectively, a first accommodating space is arranged between two adjacent single batteries in the first battery column, and a second accommodating space is arranged between two adjacent single batteries in the second battery column; when the battery pack is assembled, the single battery part in the first battery column is embedded into the corresponding second accommodating space, the single battery part in the second battery column is embedded into the corresponding first accommodating space, and the single battery part in the second battery column is projected on the bracket of the first battery column.

The second purpose of the utility model is realized by adopting the following technical scheme:

an electric device comprises the battery pack.

Compared with the prior art, the utility model has the beneficial effects that:

1. the battery pack comprises a plurality of brackets and a plurality of battery packs, wherein each battery pack is correspondingly arranged on the bracket one by one to realize block management of the battery, two adjacent battery columns on two adjacent brackets are respectively a first battery column and a second battery column, and a first accommodating space is arranged between two adjacent single batteries in the first battery column, and a second accommodating space is arranged between two adjacent single batteries in the second battery column, so that parts of the single batteries in the first battery column and the second battery column can be embedded into the opposite accommodating spaces during assembly, the accommodating spaces not only can position the assembly of the single batteries, but also can reasonably utilize the assembly space, and the energy density of the battery is improved.

2. The battery pack is applied to the electric device, so that the battery energy density of the electric device is improved.

Drawings

Fig. 1 is a schematic view showing the internal structure of a battery pack according to the present utility model;

FIG. 2 is a schematic view showing an internal partial structure of the battery pack according to the present utility model;

fig. 3 is a schematic structural view of the reinforcing beam of the present utility model.

In the figure:

1. a bracket; 10. arranging gaps;

21. a first cell string; 22. a second cell string;

3. a pipe;

41. a first accommodation space; 42. a second accommodation space;

5. a single battery;

7. a stiffening beam; 71. a fixing groove;

9. and a liquid cooling plate.

Detailed Description

The utility model will be further described with reference to the accompanying drawings and detailed description below:

in the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

As shown in fig. 1 to 3, the battery pack having a first direction (see X direction in fig. 2) and a second direction (see Y direction in fig. 2) perpendicular to each other includes a plurality of brackets 1 and a plurality of battery packs each mounted on each bracket 1 in one-to-one correspondence. The battery pack includes at least two battery strings arranged in a first direction, each of which includes a plurality of unit cells 5 arranged in a second direction.

On the basis of the above structure, two adjacent battery rows are provided on two adjacent brackets 1, namely a first battery row 21 and a second battery row 22, wherein a first accommodating space 41 is provided between two adjacent single batteries 5 in the first battery row 21, and a second accommodating space 42 is provided between two adjacent single batteries 5 in the second battery row 22.

In this way, when assembling two adjacent brackets 1, as shown in fig. 2 and 3, the unit batteries 5 in the first battery column 21 are partially embedded in the corresponding second accommodating space 42 in the second battery column 22, meanwhile, the unit batteries 5 in the second battery column 22 are partially embedded in the corresponding first accommodating space 41 in the first battery column 21, and the unit batteries 5 in the second battery column 22 are partially projected onto the brackets 1 of the first battery column 21, so that the assembling of the two brackets 1 is completed.

In the prior art, in order to realize battery block management, a plurality of battery packs are usually mounted on corresponding brackets 1 respectively, but when two brackets 1 are assembled, due to lack of guiding references, dislocation between adjacent battery strings on adjacent brackets 1 cannot be avoided, and compactness between the battery packs cannot be ensured.

Further, since the brackets 1 may generate manufacturing variations in the manufacturing process, there is an arrangement gap 10 between the two brackets 1 assembled. If the arrangement gap 10 is larger, when the single batteries 5 of the first battery column 21 and the second battery column 22 are embedded into the corresponding accommodating space during assembly, the parts of the single batteries 5 cannot cross the arrangement gap 10, i.e. the parts of the single batteries 5 are suspended above the arrangement gap 10, so that the single batteries 5 in the first battery column 21 cannot be projected onto the bracket 1 of the second battery column 22, and/or the single batteries in the second battery column 22 cannot be projected onto the bracket 1 of the first battery column; if the arrangement gap 10 is smaller, when the unit cells 5 in the second cell row 22 are mounted in the corresponding first accommodation spaces 41, the portions of the unit cells 5 in the second cell row 22 can be projected onto the brackets 1 of the first cell row 21, and similarly, when the unit cells 5 in the first cell row 21 are mounted in the corresponding second accommodation spaces 42, the portions of the unit cells 5 in the first cell row 21 can be projected onto the brackets 1 of the second cell row 22.

When the arrangement gap 10 is small, at the time of assembling the adjacent two brackets 1, there are two cases where the unit cells 5 in the adjacent cell rows of the adjacent two brackets 1 are embedded in the corresponding accommodation spaces:

the first case is that the unit cells 5 on the first cell line 21 or the second cell line 22 partially cross the arrangement gap 10 while being inserted into the corresponding receiving space. Taking the example that the part of the unit cells 5 on the second cell line 22 spans the arrangement gap 10 as shown in fig. 2, in this case, most of the unit cells 5 on the second cell line 22 are carried by one bracket 1, and the other part of the unit cells are carried by the other bracket 1 adjacent to the bracket 1, so that the unit cells 5 on one cell line are carried by the two adjacent brackets 1, and the stability between assembled battery packs and between brackets 1 is better.

The second situation is that the single batteries 5 on the first battery column 21 and the second battery column 22 span the arrangement gap 10, that is, the part of the first battery column 21 that spans the arrangement gap 10 is embedded into the second accommodating space 42, and the part of the second battery column 22 that spans the arrangement gap 10 is embedded into the first accommodating space 41, so that the first battery column 21 and the second battery column 22 can be carried by the two brackets 1, and the assembly stability is better.

Further, on the basis of the above structure, as shown in fig. 2, after the assembly of the battery pack and the bracket 1 is completed, one end of the single battery 5 far away from the bracket 1 is further connected with a conductive row, if the arrangement gap 10 is too large, the conductive row on the adjacent battery column on the adjacent bracket 1 may be involved due to vibration of the battery pack, so that the connection between the conductive row and the single battery 5 is failed or even broken, and therefore, in order to ensure that the connection of the conductive row is stable, the arrangement gap 10 must be less than or equal to 21mm; when the arrangement gap 10 is greater than or equal to 0.01mm, on one hand, the glue is conveniently filled into the arrangement gap 10 to improve the relative stability between the adjacent brackets 1, and on the other hand, because the temperature of the single batteries 5 is increased and expansion occurs when the single batteries 5 are used, the arrangement gap 10 is required to provide an expansion deformation space for the single batteries 5, so that the arrangement gap 10 is required to meet 0.01-21mm.

As shown in fig. 1 and 3, in some embodiments, when assembling the battery pack, instead of assembling the battery pack into the case of the battery pack, the plurality of brackets 1 may be assembled into a single body by connecting both ends of the plurality of brackets 1 to the reinforcing beam 7, and then installing the plurality of battery packs into the bracket 1 and then installing the plurality of battery packs into the case of the battery pack, or installing the bracket 1 into the case of the battery pack and then installing the battery pack onto the bracket 1, and the reinforcing beam 7 may be fixedly connected with the case of the battery pack to ensure that the internal structure of the battery pack is more stable.

It should be noted that, the stiffening beam 7 of the above scheme can also be directly formed integrally with the box body of the battery pack, and the assembly of the battery pack is not only efficient, but also can be applied to the battery pack and the structural stability of the battery pack can be well ensured in the use process no matter what scheme is adopted.

Further, as shown in fig. 2 and 3, considering that the battery pack will generate heat during use, the service life of the battery pack will be affected by the heat, in order to avoid the single battery 5 being in a high temperature action state, on the basis of the above structure, the liquid cooling plate 9 is arranged between two adjacent battery rows on each bracket 1, but since the liquid cooling plate 9 is internally loaded with cooling liquid, when the battery pack is vibrated, the stability of the liquid cooling plate 9 relative to the battery rows may be affected, so that the fixing grooves 71 can be arranged on the reinforcing beams 7 at two ends of the bracket 1 at positions corresponding to the ends of the liquid cooling plate 9 to avoid the above situation. Specifically, the end portions of the liquid cooling plates 9 are inserted into the corresponding fixing grooves 71 when the battery pack is assembled, stability of the liquid cooling plates 9 is ensured, and the liquid cooling plates 9 are sandwiched between adjacent battery strings, so that compactness and stability between the battery packs can be improved.

Further, in order to equalize the temperatures between the battery strings of the respective portions, one ends of the plurality of liquid cooling plates 9 may be connected in parallel through the pipe 3, so that after the cooling liquid of the liquid cooling plates 9 flows and is cyclically mixed, the temperatures of the respective liquid cooling plates 9 remain relatively stable, so that the temperatures between the battery strings of the respective portions reach the equalization, and at the same time, in order to ensure the relative stability between the pipe 3 and the bracket 1 and between the battery strings, the pipe 3 may be fixed to the outermost two brackets 1 arranged in the first direction by means of bolts or the like.

In order to avoid interference between the pipe 3 and the reinforcing beam 7 during assembly, the pipe 3 may be located between the reinforcing beam 7 and the end of the bracket 1 when assembled into the box of the battery pack, after the pipe 3 is installed on the liquid cooling plate 9, the end of the liquid cooling plate 9 is installed in the fixing groove 71 of the reinforcing beam 7, that is, the end of the liquid cooling plate 9 is inserted into the fixing groove 71 after the assembly is completed, and the pipe 3 connects the plurality of liquid cooling plates 9 in parallel between the fixing groove 71 and the end of the bracket 1.

The utility model also provides an electric device, which comprises the battery pack, and the battery pack is applied to the electric device. The electric device of the present utility model may be, but not limited to, a mobile device (e.g., a cellular phone, a notebook computer, etc.), an electric vehicle (e.g., a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, an electric bicycle, an electric scooter, an electric golf cart, an electric truck, etc.), an electric train, a ship, a satellite, an energy storage system, etc.

In some embodiments, the powered device is a pure electric vehicle, a hybrid electric vehicle, or a plug-in hybrid electric vehicle, or the like. In order to meet the high energy density requirement of the electric device for the battery, the battery pack can be adopted.

In the case where the unit cell 5 of the above embodiment is a cylindrical cell, the improvement of the assembly efficiency and the improvement of the utilization of the assembly space are more effective.

It will be apparent to those skilled in the art from this disclosure that various other changes and modifications can be made which are within the scope of the utility model as defined in the appended claims.

Claims

1. A battery pack, comprising:

a plurality of brackets (1), the plurality of brackets (1) being arranged side by side along a first direction;

a plurality of battery packs, each of which is mounted to each of the brackets (1) in one-to-one correspondence;

each battery pack comprises at least two battery columns arranged along the first direction, each battery column comprises a plurality of single batteries (5) arranged along the second direction, and the first direction is perpendicular to the second direction;

two adjacent battery columns on two adjacent brackets (1) are a first battery column (21) and a second battery column (22) respectively, a first accommodating space (41) is arranged between two adjacent single batteries (5) in the first battery column (21), and a second accommodating space (42) is arranged between two adjacent single batteries (5) in the second battery column (22); when the battery pack is assembled, the single batteries (5) in the first battery column (21) are partially embedded into the corresponding second accommodating space (42), the single batteries (5) in the second battery column (22) are partially embedded into the corresponding first accommodating space (41), and the single batteries (5) in the second battery column (22) are partially projected on the bracket (1) of the first battery column (21).

2. The battery pack according to claim 1, wherein an arrangement gap (10) is provided between two adjacent brackets (1); the single cells (5) in the first cell array (21) and the second cell array (22) partially span the arrangement gap (10).

3. The battery pack according to claim 2, wherein an end of the single battery (5) remote from the bracket (1) is connected with a conductive bar; the arrangement gap (10) is 0.01-21mm, so that the connection of the conductive bars on two adjacent battery columns is stable.

4. The battery pack according to claim 1, wherein reinforcing beams (7) are mounted at both ends of the bracket (1), a liquid cooling plate (9) is arranged between each adjacent column of battery packs in each battery pack, and both ends of the liquid cooling plate (9) are fixedly connected with the corresponding reinforcing beams (7).

5. The battery pack according to claim 4, wherein the reinforcement beam (7) is provided with a plurality of fixing grooves (71), each fixing groove (71) being provided corresponding to an end portion of each liquid cooling plate (9), and an end portion of each liquid cooling plate (9) being inserted into the corresponding fixing groove (71).

6. The battery pack according to claim 4, wherein one ends of the plurality of liquid cooling plates (9) are connected in parallel by a pipe (3), and the pipe (3) is fixed to the bracket (1).

7. An electrical device comprising the battery pack of any one of claims 1-6.