CN219350391U

CN219350391U - Air-cooled battery pack

Info

Publication number: CN219350391U
Application number: CN202320573723.5U
Authority: CN
Inventors: 褚立; 吴细彬
Original assignee: Chuneng New Energy Co Ltd
Current assignee: Chuneng New Energy Co Ltd
Priority date: 2023-03-22
Filing date: 2023-03-22
Publication date: 2023-07-14
Anticipated expiration: 2033-03-22

Abstract

The utility model discloses an air-cooled battery pack, and relates to the technical field of batteries. Including forced air cooling device and a plurality of battery cell, forced air cooling device includes main tuber pipe, at least one fan, a plurality of forced air cooling piece, at least one is installed to the mouth of pipe end of main tuber pipe the fan, a plurality of forced air cooling piece all connect in main tuber pipe, all be equipped with on every forced air cooling piece communicate in the inside forced air cooling passageway of main tuber pipe, every at least one side department of forced air cooling piece is provided with at least one battery cell. According to the air-cooled battery pack, at least one air cooling piece is arranged at each battery unit, so that air flows at each battery unit in the battery box when the fan works, the temperatures of the battery units are uniformly reduced, and the air cooling effect of the battery is improved.

Description

Air-cooled battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to an air-cooled battery pack.

Background

A battery pack is a system consisting of a number of individual cells connected in series and parallel.

In the process of charging and discharging the battery pack, the surface of the battery core can generate different heat according to different use conditions, and the heat accumulation to a certain extent can influence the performance and service life of the whole battery pack system and even influence the safety of the whole system. In this regard, the prior art typically uses air-cooled or liquid-cooled means to cool the battery pack.

The liquid cooling measure is to install a liquid cooling pipeline at the bottom of the whole battery pack, and to use an external liquid cooling unit to feed liquid cooling agent into the liquid cooling pipeline in a matching way, so that the liquid cooling agent flows in the pipeline to take away the heat of the battery pack. The scheme needs to be provided with a liquid cooling pipeline and a liquid cooling unit, so that the cost is high, and meanwhile, the whole product is large in volume. The air cooling measure is to install a fan on the whole battery pack shell, and to cool the whole battery pack by using the fan, the measure easily causes uneven temperature drop in the whole battery pack air cooling process, and influences the whole performance of the battery pack.

In chinese patent application No. CN201710157360.6, entitled air cooling system for battery pack, wind is directly blown onto the surface of a battery module to reduce the temperature of the battery module. In the device, the battery module is formed by arranging a plurality of single batteries in a matrix manner, and adjacent single batteries are mutually abutted, so that wind flow can only blow to the inner side of the single battery close to the air outlet, and the outer side of the single battery close to the air outlet and the single battery relatively farther from the air outlet can not be fully blown by the wind flow; in addition, after the wind flow is blocked by the single battery, the wind flow speed becomes low, and finally, the temperature of the single battery which is far away from the air outlet on the battery module is reduced slowly in the air cooling process, the cooling effect of each area on the battery module is uneven, and the overall performance of the battery pack is affected.

Disclosure of Invention

The utility model provides an air-cooled battery pack, wherein at least one air-cooled sheet is arranged at each battery unit, so that when a fan works, air flows at each battery unit in a battery box, the temperature of the battery units is uniformly reduced, and the air-cooled effect of the battery is improved.

The technical scheme for solving the problems is as follows: the utility model provides an air-cooled battery package, includes forced air cooling device and a plurality of battery cell, forced air cooling device includes main tuber pipe, at least one fan, a plurality of forced air cooling piece, at least one is installed to the mouth of pipe end of main tuber pipe the fan, a plurality of forced air cooling piece all connect in main tuber pipe, all be equipped with on every forced air cooling piece communicate in the inside forced air cooling passageway of main tuber pipe, every at least one side department of forced air cooling piece is provided with at least one battery cell.

Further, the air cooling piece is detachably connected to the main air pipe; one end of the air cooling piece is provided with a clamping piece, the main air pipe is correspondingly provided with a clamping groove, and the bottom of the clamping groove of the main air pipe is provided with an air outlet; when the air cooling piece is clamped to the main air pipe, the passage opening of the air cooling passage is in butt joint with the air outlet, so that the air cooling passage is communicated with the main air pipe.

Further, the battery cell cooling device further comprises at least one battery cell limiting plate used for limiting the battery cells, and each air cooling piece is provided with at least one battery cell limiting plate.

Further, the electric core limiting plate is integrally connected with the air cooling piece, and the electric core limiting plate extends from the air cooling piece to two sides of the air cooling piece at the same time, so that one electric core limiting plate can limit electric core units on two sides of the air cooling piece at the same time.

Further, the battery units are closely arranged on the side surfaces of the corresponding air cooling sheets.

Further, the battery pack also comprises a heat conduction layer arranged between the air cooling sheet and the battery unit, wherein the heat conduction layer is tightly adhered to the battery unit.

Further, the heat conducting layer is made of heat conducting silica gel.

Further, the air cooling device further comprises a branch piece connected to the air cooling piece and extending out towards two sides of the air cooling piece, and the air cooling channel correspondingly extends into the branch piece and forms an opening at the end part of the branch piece.

Further, the air cooling device comprises a containing box body used for containing the air cooling device and the plurality of battery units.

Further, a plurality of exhaust grooves are uniformly formed in the side wall of the accommodating box body, which corresponds to the fan.

Further, a plurality of ventilation round holes are uniformly formed in the side wall of the box body, corresponding to the channel opening of the air cooling channel, of the accommodating box body.

Further, structural reinforcing ribs for preventing the air cooling channel from being deformed due to extrusion are arranged in the air cooling channel.

The utility model has the beneficial effects that:

1. because the wind flow can reach each electric core unit department through the air-cooled blade, consequently the battery package cooling effect is more obvious, and the cooling rate is faster.

2. Because the wind flow can reach each electric core unit department through the air cooling blade, consequently the whole cooling of battery package is more balanced, the inside slower problem of outside cooling of traditional forced air cooling measure can not appear.

3. The air cooling sheet is connected with the main air cooling pipeline by using a clamping groove, and the assembly and disassembly modes are simpler and more convenient.

4. The air cooling channel of the air cooling sheet is internally provided with the structural reinforcing ribs, so that the whole structure of the air cooling sheet is firmer, and the air cooling sheet is not easy to deform when being extruded by the electric cores at two ends, thereby maintaining the whole battery pack structure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model. In the drawings, like reference numerals are used to identify like elements. The drawings, which are included in the description, illustrate some, but not all embodiments of the utility model. Other figures can be derived from these figures by one of ordinary skill in the art without undue effort.

Fig. 1 is an overall structure diagram of an air-cooled battery pack according to a first embodiment;

fig. 2 is a structural diagram of an air cooling device according to the first embodiment;

fig. 3 is a structural diagram of a main duct according to the first embodiment;

FIG. 4 is a block diagram of an air-cooled panel according to the first embodiment;

fig. 5 is a structural view of a housing case of the first embodiment;

fig. 6 is an exploded view of the structure of an air-cooled battery pack according to the first embodiment at the position where the air-cooled sheet is attached to the battery cells;

fig. 7 is a schematic top view of the overall structure of an air-cooled battery pack according to the second embodiment;

FIG. 8 is a block diagram of an air-cooled panel according to a second embodiment;

1-air cooling device, 11-main tuber pipe, 12-fan, 13-forced air cooling piece, 14-forced air cooling passageway, 15-joint groove, 16-joint spare, 17-air outlet, 2-battery unit, 3-electric core limiting plate, 4-hold box, 41-exhaust groove, 42-bleeder vent, 5-structure strengthening rib, 6-branching piece, 7-heat-conducting layer.

Detailed Description

The terms of orientation such as up, down, left, right, front, rear, front, back, top, bottom, etc. mentioned or possible in this specification are defined with respect to the configurations shown in the drawings, and the terms "inner" and "outer" refer to the relative concepts of the terms toward or away from the geometric center of a particular component, respectively, and thus may be changed accordingly depending on the location and use state of the component. These and other directional terms should not be construed as limiting terms.

Embodiment one:

referring to fig. 1-5, in the present embodiment, an air-cooled battery pack includes an air-cooling device 1 and two rows of battery units 2, each row of battery units 2 is formed by arranging a plurality of battery units 2 in equal intervals, and the two rows of battery units 2 are respectively located at two sides of the air-cooling device 1; the air cooling device 1 comprises a main air pipe 11, a fan 12 and a plurality of air cooling fins 13; each air cooling fin 13 is provided with an air cooling channel 14.

Wherein the main air pipe 11 is a cuboid pipeline, and a plurality of rectangular air outlets 17 are formed at equal distances on two sides of the main air pipe 11; the air cooling plates 13 are also rectangular, and air cooling channels 14 formed in the air cooling plates 13 are also rectangular channels, when the air cooling plates 13 are connected to the main air pipe 11, the air cooling channels 14 of any air cooling plate 13 are correspondingly butted with one air outlet 17, so that all the air cooling channels 14 are communicated with the main air pipe 11; the fans 12 are arranged in two, and the two fans 12 are both arranged at the pipe orifice end of the main air pipe 11.

In addition, when two rows of battery units 2 are disposed on two sides of the main air duct 11 of the air cooling device 1, the battery units 2 are distributed along the length direction of the main air duct 11, at least one air cooling sheet 13 is disposed between every two adjacent battery units 2 along the length direction of the main air duct 11, and the adjacent air cooling sheets 13 and the battery units 2 are in contact with each other.

In summary, as each battery unit 2 is provided with the air cooling piece 13, when the fan 12 works, air enters from a channel port of the air cooling channel 14, which is far away from the main air pipe 11, then enters the main air pipe 11 along the air cooling channel 14, and is extracted from a pipe orifice of the main air pipe 11 by the fan 12; in this process, the heat generated by each battery unit 2 can be correspondingly taken away by the air flowing in the air cooling channel 14, so that each battery unit 2 can be cooled even if the heat is dissipated, and the cooling of the battery pack is consistent.

In the present embodiment, the air-cooling device 1 and the plurality of battery cells 2 are each disposed in a housing case 4, and the housing case 4 corresponds to a container that houses the battery cells 2 and a case that protects the battery cells 2.

In addition, although the air cooling device 1 and the battery unit 2 are both arranged in the accommodating box 4, a plurality of air exhaust grooves 41 are uniformly formed in the side wall of the accommodating box 4 corresponding to the installation position of the fan 12, and a plurality of air holes 42 are also uniformly formed in the side wall of the accommodating box 4 corresponding to the passage opening of the air cooling passage 14, so that air can flow conveniently and air cooling of the air cooling device 1 can be facilitated.

As one of the preferable items of the present embodiment, in order to enhance the cooling effect of the air cooling device 1, the air cooling fins 13 are made of a metal material having good heat conductive properties; in addition, each battery unit 2 has one side or two sides which are correspondingly and tightly attached to one air cooling piece 13 or the sides of the two air cooling pieces 13, so that the heat generated by the battery unit 2 can be directly transferred to the air cooling pieces 13, and the air cooling speed is increased.

In this embodiment, in order to ensure that the battery units 2 can be tightly attached to the corresponding air cooling sheets 13, the battery units 2 at two ends of the main air duct 11 are respectively clamped and fixed by matching one air cooling sheet 13 with the side wall of the accommodating box body 4, and each other battery unit 2 is correspondingly clamped and fixed by two air cooling sheets 13, so that all the battery units 2 arranged in the accommodating box body 4 can be fixed, and each battery unit 2 can be tightly contacted with the side surface of the air cooling sheet 13 under the action of the clamping force of the air cooling sheet 13, thereby improving the heat transfer efficiency.

Moreover, when the air cooling device 1 is fixed in the accommodating box 4 in the above manner, the battery unit 2 is clamped and limited by the air cooling fins 13, and the battery unit 2 is not required to be fixed by other manners such as gluing.

As a second preferred item of the present embodiment, in order to enable the battery unit 2 to be better fixed by the two air cooling sheets 13 when being mounted between the two air cooling sheets 13, at least one horizontal battery cell limiting plate 3 is disposed at the upper end edge of each air cooling sheet 13, the battery cell limiting plates 3 are integrally disposed at the upper end edge of the air cooling sheet 13, and the battery cell limiting plates 3 extend out to both sides of the air cooling sheet 13.

In this regard, when two air cooling sheets 13 cooperate to clamp one battery unit 2 or one air cooling sheet 13 cooperates to clamp one battery unit 2 on the side wall of the accommodating box 4, the bottom wall of the accommodating box 4 and the battery cell limiting plate 3 can cooperate to further limit the battery unit 2 between the air cooling sheet 13 and the side wall of the accommodating box 4 or between the two air cooling sheets 13, so as to further limit the battery unit 2, and prevent the battery unit 2 from moving in the accommodating box 4.

In addition, when the battery units 2 are arranged on both sides of one air cooling piece 13, one battery cell limiting plate 3 can limit two battery units 2 at the same time.

Moreover, when the upper end of the air cooling piece 13 is provided with the battery cell limiting plate 3, the battery cells 2 positioned at the two ends of the main air pipe 11 can be mutually matched and limited and fixed only by the side wall of the air cooling piece 13, the bottom wall of the accommodating box body 4 and the battery cell limiting plate 3, so that the battery cells 2 at the outermost side do not need to be fixed by depending on the side wall of the accommodating box body 4, and the air cooling device 1 and the battery cells 2 are conveniently arranged in the accommodating box body 4.

In addition, in order to further increase the contact area between the battery unit 2 and the air cooling fins 13, a heat conducting layer 7 is further arranged between each two air cooling fins 13 which are in contact with each other and the battery unit 2, and the heat conducting layer 7 can ensure that the battery unit 2 is in full contact with the two contacted side surfaces of the air cooling fins 13, so that the efficiency of heat transfer to the air cooling fins 13 is maximized.

In the present embodiment, the heat conductive layer 7 is made of heat conductive silica gel. Specifically, the corresponding side surfaces of the air cooling sheets 13 or the corresponding side surfaces of the battery cells 2 are coated with heat conducting silica gel, and before the heat conducting silica gel is not completely solidified, the air cooling device 1 and the battery cells 2 are assembled, and then the heat conducting silica gel is formed into the heat conducting layer 7 between the battery cells 2 and the air cooling sheets 13.

As a third preferred aspect of the present embodiment, in order to facilitate the maintenance of the battery pack at a later stage, an air cooling fin 13 is detachably connected to the main duct 11.

Specifically, a T-shaped clamping piece 16 is arranged at one end of the air cooling piece 13, a clamping groove 15 capable of correspondingly accommodating the clamping piece 16 is correspondingly arranged at each air outlet 17 of the main air pipe 11, the air outlet 17 is arranged at the bottom of the clamping groove 15, and one passage opening of the air cooling passage 14 is arranged at the clamping piece 16. In this regard, the air cooling plate 13 can be installed at the main air duct 11 in a clamping and inserting manner, and a technician can also slide and withdraw the air cooling plate 13, so as to facilitate maintenance or replacement of the battery unit 2.

For ease of understanding, the clamping groove 15 may be seen as being "C" shaped.

Although the present embodiment describes a case where the air cooling device 1 is provided with a single row of battery cells 2 on each side, the number of battery cells 2 is not limited to one row on each side of the air cooling device 1. In practical application, only by increasing the length of the air cooling fin 13, two or more rows of battery units 2 can be respectively arranged on two sides of the air cooling device 1.

In addition, the air cooling channel 14 is further provided with a structural reinforcing rib 5, and the structural reinforcing rib 5 is used for reinforcing the structural strength of the air cooling sheet 13 so as to prevent the air cooling sheet 13 from being extruded by the battery unit 2 to deform when the battery unit 2 is clamped by being matched with each other.

Embodiment two:

referring to fig. 6 and 7, unlike the first embodiment, two rows of battery units 2 are disposed on two sides of the air cooling device 1 of the present embodiment, and two battery units 2 of two rows of battery units 2 are clamped between two adjacent air cooling fins 13 on one side.

In the case where two rows of battery cells 2 are provided on one side of the air-cooling device 1, heat is not well removed in the space between two adjacent rows of battery cells 2 because the space is small. Therefore, in the present embodiment, the two sides of the air cooling plate 13 are correspondingly provided with the vertically extending branch plates 6, and the air cooling channels 14 correspondingly extend at the branch plates 6 and form openings at the ends of the branch plates 6, so that in the direction perpendicular to the length of the main air duct 11, each adjacent two battery units 2 have the branch air cooling channel 14 formed by one branch plate 6 or two butt-joint branch plates 6, so that at least three sides of each battery unit 2 can contact with the air cooling plate 13 or the branch plates 6, thereby improving the cooling effect of the air cooling device 1 on each battery unit 2.

The present embodiment is also applicable to a case where a row of battery cells 2 is provided on one side of the air cooling device 1. The embodiment is applicable to the case that only one row of battery units 2 is arranged on one side of the air cooling device 1, and the positions of the branch pieces 6 and the lengths of the air cooling pieces 13 are only required to be adjusted in a adapting way, so that the lengths of the air cooling pieces 13 are equivalent to the corresponding lengths of the battery units 2, and the branch pieces 6 are arranged at one end of the air cooling pieces 13 far away from the main air pipe 11; the foregoing adjustment is merely a conventional technical solution in the art, and is not described herein in detail.

The above is applicable to the prior art, where nothing is mentioned.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. The utility model provides an air-cooled battery package, includes air-cooling device (1) and a plurality of battery cell (2), its characterized in that, air-cooling device (1) is including main tuber pipe (11), at least one fan (12), a plurality of forced air cooling piece (13), at least one is installed to the mouth of pipe end of main tuber pipe (11) fan (12), a plurality of forced air cooling piece (13) all connect in main tuber pipe (11), all be equipped with on every forced air cooling piece (13) communicate in inside forced air cooling passageway (14) of main tuber pipe (11), every at least one side department of forced air cooling piece (13) is provided with at least one battery cell (2).

2. An air-cooled battery pack according to claim 1, wherein the air-cooled sheet (13) is detachably connected to the main air duct (11); one end of the air cooling piece (13) is provided with a clamping piece (16), the main air pipe (11) is correspondingly provided with a clamping groove (15), and the bottom of the clamping groove (15) of the main air pipe (11) is provided with an air outlet (17); when the air cooling piece (13) is clamped to the main air pipe (11), the channel opening of the air cooling channel (14) is in butt joint with the air outlet (17), so that the air cooling channel (14) is communicated with the main air pipe (11).

3. An air-cooled battery pack according to claim 1, further comprising at least one cell limiting plate (3) for limiting the battery cells (2), wherein each air-cooled sheet (13) is provided with at least one cell limiting plate (3).

4. An air-cooled battery pack according to claim 3, wherein the cell limiting plates (3) are integrally connected with the air-cooled sheets (13), and the cell limiting plates (3) extend from the air-cooled sheets (13) to both sides of the air-cooled sheets (13) at the same time, so that one cell limiting plate (3) can limit the cell units on both sides of one air-cooled sheet (13) at the same time.

5. An air-cooled battery pack according to claim 1, wherein the battery cells (2) are arranged closely on the side of the corresponding air-cooled sheet (13).

6. An air-cooled battery pack according to claim 5, further comprising a heat conductive layer (7) provided between the air-cooled sheet (13) and the battery cell (2) that are abutted against each other.

7. An air-cooled battery pack according to claim 1, further comprising a branch piece (6) connected to the air-cooled piece (13) and extending to both sides of the air-cooled piece (13), wherein the air-cooled channel (14) extends into the branch piece (6) and forms an opening at an end of the branch piece (6).

8. An air-cooled battery pack according to claim 1, further comprising a housing case (4) for housing the air-cooling device (1) and the plurality of battery cells (2).

9. An air-cooled battery pack as claimed in claim 8, wherein a plurality of air discharge grooves (41) are uniformly formed in the side wall of the accommodating case (4) corresponding to the blower (12).

10. An air-cooled battery pack according to claim 8, wherein a plurality of ventilation holes (42) are uniformly formed in a side wall of the housing case (4) corresponding to the passage opening of the air cooling passage (14).