CN220963598U - Battery pack and electricity utilization device - Google Patents

Abstract

The utility model provides a battery pack and an electric device, wherein the battery pack comprises a shell and a first partition plate arranged in the shell; an accommodating space is formed in the shell, and the first partition plate at least can partition the accommodating space into a battery core accommodating space for accommodating a battery core and an electric part accommodating space for accommodating an electric part; the battery cells are sequentially stacked in the battery cell accommodating space along a preset direction. According to the battery pack, the first partition plate is arranged in the battery pack to partition the accommodating space into the battery core accommodating space and the electric part accommodating space, so that the position for installing the battery core in the battery pack and the position for installing the electric part can be partitioned, the damage of the electric part caused by thermal runaway of the battery core can be prevented, the spreading of the thermal runaway of the battery core is restrained, and the loss caused by the thermal runaway of the battery core and the after-sales maintenance cost are reduced.

Description

Battery pack and electricity utilization device

Technical Field

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

Background

In the current market, soft package battery cell household battery storage systems basically adopt CTM, MTP and other package schemes, a battery module is generally formed by a single battery cell in the package process, and the battery module is installed with components such as an upper side plate, an end plate and the like and then is arranged in a box body to form a battery package.

Because each battery module is provided with an end plate and a side plate, and different battery modules are electrically connected, the structure is complex, and the improvement of the energy density of the battery pack is not facilitated while the production cost is high. And the battery pack is limited by the structure of the existing battery pack, the capability of inhibiting the thermal runaway from spreading is limited after the battery core is out of control, and once the battery core is out of control, all components in the battery pack are basically damaged, so that property loss is caused, and meanwhile, the safety of related personnel cannot be guaranteed.

Disclosure of utility model

In view of the foregoing, the present utility model is directed to a battery pack to facilitate reducing the loss caused by thermal runaway of the battery cells.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

A battery pack comprising a housing, and a first separator disposed within the housing;

An accommodating space is formed in the shell, and the first partition plate at least can partition the accommodating space into a battery core accommodating space for accommodating a battery core and an electric part accommodating space for accommodating an electric part;

the battery cells are stacked in the battery cell accommodating space in sequence along a preset direction.

Further, the electric part accommodating space includes a first sub accommodating space accommodating the BMS module, and a second sub accommodating space accommodating the power harness assembly.

Further, the first sub-accommodating space and the second sub-accommodating space are respectively arranged at two sides of the battery cell accommodating space along the preset direction.

Further, the battery cell storage space is divided into a third sub-storage space and a fourth sub-storage space by the second partition plate;

the battery cell is arranged in the third sub-accommodating space, a gap is formed in the second partition plate, the tab of the battery cell extends into the fourth sub-accommodating space through the gap, and an acquisition plate connected with the tab is arranged in the fourth sub-accommodating space.

Further, a reinforcing plate is arranged on one side of the second partition plate, which faces the fourth sub-accommodating space, and an accommodating groove for accommodating the collecting plate is formed between the reinforcing plate and the second partition plate.

Further, the shell comprises a top plate and a bottom plate which are arranged at intervals up and down, and a side plate assembly connected between the top plate and the bottom plate;

the side plate assembly comprises two first side plates and two second side plates, the two first side plates are arranged at intervals along the preset direction, the two second side plates are arranged between the two first side plates, and the top plate, the bottom plate, the two first side plates and the two second side plates jointly enclose to form the accommodating space.

Further, the first side plate is connected with the second side plate through a mortise and tenon structure, and/or a limiting hole is formed between the first side plate and the second side plate, and a limiting pin is inserted into the limiting hole.

Further, the mortise and tenon structure comprises a groove arranged on one of the first side plate and the second side plate, and a protrusion arranged on the other of the first side plate and the second side plate and embedded in the groove, and the limiting hole is formed between the protrusion and the groove.

Further, a first sealing strip is arranged between the top plate and the side plate assembly, a first outer protruding part extending outwards along the radial direction of the limiting pin is arranged on the limiting pin, and the first outer protruding part is positioned between the top plate and the side plate assembly; and/or the number of the groups of groups,

The bottom plate with be equipped with the second sealing strip between the curb plate subassembly, be equipped with on the spacing round pin along the radial outward second outward extension of self, the second outward extension is located the bottom plate with between the curb plate subassembly.

Compared with the prior art, the utility model has the following advantages:

According to the battery pack, the first partition plate is arranged in the battery pack to partition the accommodating space into the battery core accommodating space and the electric part accommodating space, so that the position for installing the battery core in the battery pack and the position for installing the electric part can be partitioned, the damage of the electric part caused by thermal runaway of the battery core can be prevented, the spreading of the thermal runaway of the battery core is restrained, the loss caused by the thermal runaway of the battery core is reduced, and the after-sale maintenance cost of the battery pack is reduced.

In addition, through being provided with second partition board and separating electric core accommodation space into third sub accommodation space and fourth sub accommodation space to locate the third sub accommodation space with the electric core, locate the fourth sub accommodation space with the collection board, can separate electric core and the mounted position of collection board, thereby when the electric core takes place thermal runaway, reduce the influence that the collection board received electric core thermal runaway.

In addition, through being provided with first outer protruding portion and second outer protruding portion, can restrict the clearance between apron and curb plate subassembly and bottom plate and the curb plate subassembly respectively to guarantee that first sealing strip and second sealing strip have sufficient installation space, do benefit to the sealed effect of assurance sealing strip.

Another object of the present utility model is to propose an electric device in which the battery pack as described above is provided.

Compared with the prior art, the power utilization device and the battery pack have the same technical effects, and detailed description thereof is omitted.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and 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 utility model. In the drawings:

fig. 1 is a schematic view of a battery pack according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a connection structure of a housing, a first partition plate, and a second partition plate according to an embodiment of the present utility model;

fig. 3 is a schematic view illustrating a part of a structure of a battery pack according to an embodiment of the present utility model;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is an enlarged view of portion B of FIG. 3;

FIG. 6 is a schematic view of a second separator according to an embodiment of the present utility model;

FIG. 7 is an enlarged view of portion C of FIG. 6;

Fig. 8 is a schematic diagram of a connection structure between a collecting plate and a tab according to an embodiment of the present utility model;

Fig. 9 is a schematic view illustrating a structure of a battery pack according to an embodiment of the present utility model when stacked.

Reference numerals illustrate:

1. A first partition plate; 2. a cell accommodating space; 201. a third sub-accommodating space; 202. a fourth sub-accommodating space; 3. an electric component accommodation space; 301. a first sub-accommodation space; 302. a second sub-accommodation space; 4. a second partition plate; 401. a slit; 5. a collection plate; 6. a battery cell; 601. a tab; 7. a reinforcing plate; 8. a receiving groove; 9. tin sheets; 10. collecting a wire harness; 11. a BMS module; 12. a power harness assembly; 13. a top plate; 14. a bottom plate; 15. a first side plate; 16. a second side plate; 17. a groove; 18. a protrusion; 19. a limiting pin; 20. a first outer flange.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be noted that, if terms indicating an orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. are presented, they are based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, if any, are also used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, in the description of the present utility model, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in combination with specific cases.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Example 1

The present embodiment relates to a battery pack that includes a case, and a first separator 1 disposed inside the case, as shown in fig. 1 to 9, in its entire construction. An accommodation space is formed in the housing, and the first partition plate 1 can partition the accommodation space into a cell accommodation space 2 accommodating the cell 6, and an electric component accommodation space 3 accommodating an electric component. The battery cells 6 are stacked in the battery cell accommodation space 2 in order along a preset direction.

It can be appreciated that in this embodiment, by providing the first partition plate 1 in the battery pack to partition the accommodating space into the battery cell accommodating space 2 and the electric component accommodating space 3, the position where the battery cell 6 is mounted in the battery pack and the position where the electric component is mounted can be partitioned, so that damage to the electric component can be prevented from being caused after thermal runaway of the battery cell 6, the spreading of the thermal runaway of the battery cell 6 can be suppressed, the loss caused by the thermal runaway of the battery cell 6 can be reduced, and the after-sales maintenance cost can be reduced.

It should be noted that, in the present embodiment, the first partition plate 1 is provided to partition the accommodating space into the cell accommodating space 2 and the electrical component accommodating space 3, which is only a preferred embodiment, and if other components in the battery pack have a requirement of being separately arranged, the number of the first partition plates 1 may be selectively adjusted to define a space for separately accommodating the components.

Based on the above overall description, as a preferred embodiment, as shown in fig. 2, the electrical part accommodating space 3 includes a first sub-accommodating space 301 accommodating the BMS module 11, and a second sub-accommodating space 302 accommodating the power harness assembly 12 in the present embodiment. By having the electrical component accommodation space 3 include the first sub-accommodation space 301 and the second sub-accommodation space 302, the arrangement of the BMS module 11 and the power harness assembly 12 may be facilitated, respectively. And other electric components in the battery pack may be selectively disposed in the first or second sub-receiving space 301 or 302.

In addition, the BMS module 11 and the power harness assembly 12 in the present embodiment are all commonly found in the existing battery pack, and as shown in fig. 2, the power harness assembly 12 includes a connector disposed in the second sub-receiving space 302, and the connector can be connected with the battery cells 6 in the battery pack through a wire harness, and the connector is extended to the outside of the battery pack, which can be used for connection between different battery packs to expand the capacity, or connected to an inverter to perform charge and discharge operations.

Preferably, in the present embodiment, the first sub-receiving space 301 and the second sub-receiving space 302 are disposed at both sides of the battery cell receiving space 2 along the preset direction, respectively. The arrangement is simple and the assembly is convenient. In practice, as also shown in fig. 2, two first partition plates 1 are disposed in the accommodating space at intervals along a preset direction, a cell accommodating space 2 is defined between the two first partition plates 1, and a first sub-accommodating space 301 and a second sub-accommodating space 302 are defined between the two first partition plates 1 and the housing, respectively.

As a preferred embodiment, as shown in fig. 2 and 3, the battery pack in this embodiment further includes a second partition board 4 disposed in the cell accommodating space 2, and the second partition board 4 partitions the cell accommodating space 2 into a third sub-accommodating space 201 and a fourth sub-accommodating space 202. The battery cell 6 is arranged in the third sub-accommodating space 201, a gap 401 is formed in the second partition plate 4, a tab 601 of the battery cell 6 extends into the fourth sub-accommodating space 202 through the gap 401, and an acquisition plate 5 connected with the tab 601 is arranged in the fourth sub-accommodating space 202.

It can be understood that the second partition board 4 is provided to partition the battery cell accommodating space 2 into the third sub-accommodating space 201 and the fourth sub-accommodating space 202, and the battery cell 6 is arranged in the third sub-accommodating space 201, and the collecting board 5 is arranged in the fourth sub-accommodating space 202, so that the mounting positions of the battery cell 6 and the collecting board 5 can be partitioned, and when the battery cell 6 is in thermal runaway, the influence of the thermal runaway of the battery cell 6 on the collecting board 5 is reduced.

It should be noted that, the collecting board 5 in this embodiment is connected with the tab 601 of the electric core 6, and can collect the voltage and the temperature of the electric core 6, and the collecting board 5 is a structure commonly used in the existing battery pack, which is not described in detail herein, and as shown in fig. 3, 4 and 8, the collecting board 5 and the tab 601 can be connected through the tin sheet 9, and the collecting board 5 and the BMS module 11 can be connected through the collecting wire harness 10, so as to transmit the collected information to the BMS module 11.

In addition, the first separator 1 and the second separator 4 in this embodiment can be made of a PC-ABS plastic alloy, which has both excellent heat and weather resistance, dimensional stability and impact resistance of PC resin and excellent processing fluidity of ABS resin.

As a preferred embodiment, as shown in fig. 4 and fig. 6 and 7, in the present embodiment, a reinforcing plate 7 is provided on a side of the second partition plate 4 facing the fourth sub-accommodation space 202, and an accommodation groove 8 accommodating the collection plate 5 is formed between the reinforcing plate 7 and the second partition plate 4. It can be appreciated that by being provided with the reinforcing plate 7, when the structural strength of the second partition plate 4 can be promoted, the accommodating groove 8 for accommodating the collecting plate 5 is formed between the reinforcing plate 7 and the second partition plate 4, so that the collecting plate 5 can be conveniently installed, and the protecting effect on the collecting plate 5 can be promoted.

Further, as preferable, the housing in the present embodiment includes a top plate 13 and a bottom plate 14 arranged at an upper and lower interval, and a side plate assembly connected between the top plate 13 and the bottom plate 14. The side plate assembly comprises two first side plates 15 and two second side plates 16, the two first side plates 15 are arranged at intervals along a preset direction, the two second side plates 16 are arranged between the two first side plates 15, and the top plate 13, the bottom plate 14, the two first side plates 15 and the two second side plates 16 jointly enclose to form an accommodating space. The housing comprises the top plate 13, the bottom plate 14, the first side plate 15 and the second side plate 16, so that the structure of each part is simple and the processing is convenient. In addition, the first side plate 15 and the second side plate 16 may be connected to the top plate 13 and the bottom plate 14 by a connection method commonly used in the art, such as a bolt connection.

In this embodiment, the first side plate 15 and the second side plate 16 are connected by a mortise and tenon structure, and a limiting hole is formed between the first side plate 15 and the second side plate 16, and a limiting pin 19 is inserted into the limiting hole. It can be appreciated that the first side plate 15 and the second side plate 16 are connected through mortise and tenon structures, so that the connecting structure is simple, and the cost of producing parts can be reduced. And through being provided with spacing hole and spacer 19, do benefit to further promote the connection effect between first curb plate 15 and the second curb plate 16.

Of course, in this embodiment, even though the first side plate 15 and the second side plate 16 are connected by the mortise and tenon structure, the limiting hole and the limiting pin 19 are provided between the first side plate 15 and the second side plate 16, which is only a preferred embodiment, and in addition, only the mortise and tenon structure or only the limiting hole and the limiting pin 19 may be alternatively provided.

In particular, as shown in fig. 3 and 5, the mortise and tenon structure includes a groove 17 provided on the second side plate 16, and a protrusion 18 provided on the first side plate 15 and embedded in the groove 17, and a limiting hole is formed between the protrusion 18 and the groove 17. This facilitates further assurance of the engagement effect between the first side plate 15 and the second side plate 16. In addition, as shown in fig. 1 and 8, the top end of the limit pin 19 is extended out of the cover plate, so that when a plurality of battery packs are stacked and connected, the limit pin 19 can be inserted into a limit hole on another battery pack, thereby facilitating positioning between two adjacent battery packs.

As a preferred embodiment, as shown in fig. 5, a first sealing strip is arranged between the top plate 13 and the side plate assembly, and a first outer flange 20 extending radially outwards is arranged on the limiting pin 19, and the first outer flange 20 is located between the top plate 13 and the side plate assembly. A second sealing strip is arranged between the bottom plate 14 and the side plate assembly, a second outer convex part which extends outwards along the radial direction of the limiting pin 19 is arranged on the limiting pin, and the second outer convex part is arranged between the bottom plate 14 and the side plate assembly.

Through being provided with first outer protruding portion 20 and second outer protruding portion, can restrict the clearance between apron and curb plate subassembly respectively to and bottom plate 14 and the curb plate subassembly, in order to guarantee that first sealing strip and second sealing strip have sufficient installation space, prevent in the use, because of the bolt torsion is too big, lead to the sealing strip to bear the damage of pressure too big and the sealing strip that causes from this, guarantee sealed effect.

Of course, the present embodiment is provided with both the first outer protruding portion 20 and the second outer protruding portion, which is a preferred embodiment, and it is also possible to selectively provide only the first outer protruding portion 20 or only the second outer protruding portion.

In the battery pack of this embodiment, after the first end plate is mounted on the bottom plate 14, the battery cells 6 can be directly stacked on the bottom plate 14, foam is disposed between the battery cells 6, and after the battery cells 6 are extruded by the extrusion tooling, the mounting of the first partition plate 1, the second partition plate 4, the second side plate 16 and the top plate 13 is completed. It can be appreciated that in this embodiment, the battery cells 6 are directly stacked to form a battery pack, so that the process from the battery cells 6 to the modules and the process from the modules to the battery pack is simplified, the production efficiency is improved, the internal structure of the battery pack is simplified, and the energy density of the battery pack is improved.

The battery pack of this embodiment is through separating the space inside the battery pack into electric core accommodation space 2 and electric component accommodation space 3, can separate the position of installation electric core 6 in the battery pack and the position of installation electric component to can prevent that electric core 6 from causing electric component damage after taking place thermal runaway, suppress the spreading of electric core 6 thermal runaway, reduce the loss that electric core 6 thermal runaway leads to, and after-market maintenance cost. And the setting of second partition board 4 can play better protective effect to collection board 5, further reduces the loss that electric core 6 thermal runaway caused.

Example two

The embodiment relates to an electric device, and a battery pack of the first embodiment is arranged in the electric device.

Compared with the prior art, the power utilization device of the embodiment and the battery pack of the first embodiment have the same technical effects, and are not described in detail herein.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. A battery pack, characterized in that:

comprises a shell and a first partition plate arranged in the shell;

An accommodating space is formed in the shell, and the first partition plate at least can partition the accommodating space into a battery core accommodating space for accommodating a battery core and an electric part accommodating space for accommodating an electric part;

the battery cells are stacked in the battery cell accommodating space in sequence along a preset direction.

2. The battery pack according to claim 1, wherein:

The electric part accommodating space includes a first sub accommodating space accommodating the BMS module, and a second sub accommodating space accommodating the power harness assembly.

3. The battery pack according to claim 2, wherein:

The first sub-accommodating space and the second sub-accommodating space are respectively arranged at two sides of the battery cell accommodating space along the preset direction.

4. The battery pack according to claim 1, wherein:

The battery cell accommodating space is divided into a third sub-accommodating space and a fourth sub-accommodating space by the second partition plate;

the battery cell is arranged in the third sub-accommodating space, a gap is formed in the second partition plate, the tab of the battery cell extends into the fourth sub-accommodating space through the gap, and an acquisition plate connected with the tab is arranged in the fourth sub-accommodating space.

5. The battery pack according to claim 4, wherein:

And a reinforcing plate is arranged on one side of the second partition plate, which faces the fourth sub-accommodating space, and an accommodating groove for accommodating the collecting plate is formed between the reinforcing plate and the second partition plate.

6. The battery pack according to claim 1, wherein:

The shell comprises a top plate, a bottom plate and a side plate assembly, wherein the top plate and the bottom plate are arranged at intervals up and down, and the side plate assembly is connected between the top plate and the bottom plate;

the side plate assembly comprises two first side plates and two second side plates, the two first side plates are arranged at intervals along the preset direction, the two second side plates are arranged between the two first side plates, and the top plate, the bottom plate, the two first side plates and the two second side plates jointly enclose to form the accommodating space.

7. The battery pack according to claim 6, wherein:

The first side plate is connected with the second side plate through a mortise and tenon structure, and/or a limiting hole is formed between the first side plate and the second side plate, and a limiting pin is inserted into the limiting hole.

8. The battery pack according to claim 7, wherein:

The mortise and tenon structure comprises a groove arranged on one of the first side plate and the second side plate, and a protrusion arranged on the other of the first side plate and the second side plate and embedded in the groove, and the limiting hole is formed between the protrusion and the groove.

9. The battery pack according to claim 7, wherein:

A first sealing strip is arranged between the top plate and the side plate assembly, a first outer protruding part extending outwards along the radial direction of the limiting pin is arranged on the limiting pin, and the first outer protruding part is positioned between the top plate and the side plate assembly; and/or the number of the groups of groups,

The bottom plate with be equipped with the second sealing strip between the curb plate subassembly, be equipped with on the spacing round pin along the radial outward second outward extension of self, the second outward extension is located the bottom plate with between the curb plate subassembly.

10. An electrical device, characterized in that:

The battery pack according to any one of claims 1 to 9 is provided in the power consumption device.