CN215119087U - Buffer member in battery pack and battery pack - Google Patents

Abstract

The application provides a bolster and group battery in group battery. The buffer piece comprises a frame body, wherein the frame body is in a flat plate shape, the frame body is provided with an outer peripheral surface and an inner peripheral surface which are opposite to each other, and two opposite plate surfaces which connect the outer peripheral surface and the inner peripheral surface, and when the two plate surfaces are respectively and completely covered by one single battery, the frame body is communicated with the inside and the outside. The utility model provides a negative pressure can be avoided appearing between two adjacent batteries to the bolster, improves the group battery life-span.

Description

Buffer member in battery pack and battery pack

Technical Field

This application belongs to battery technical field, concretely relates to bolster and group battery in group battery.

Background

A battery module or a battery pack generally has a housing and an array of batteries disposed within the housing. In the related art, a clip-shaped buffer is disposed between two adjacent batteries, and the clip-shaped buffer is used for relieving mutual compression between the batteries caused by charging expansion of the batteries. When the batteries are charged and expanded, the buffer member is brought into close contact with the adjacent two batteries, and air between the batteries is partially discharged. When the batteries are discharged and retracted, negative air pressure is formed between the batteries, which is not beneficial to the retraction of the batteries. Thus, the life of the battery module or the battery pack is affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a bolster and group battery in group battery to prior art's weak point.

In order to solve the technical problem, the following technical scheme is adopted in the application: a buffer piece in a battery pack comprises a frame body, wherein the frame body is in a flat plate shape, the frame body is provided with an outer peripheral surface and an inner peripheral surface which are opposite to each other, and two opposite plate surfaces which connect the outer peripheral surface and the inner peripheral surface, and when the two plate surfaces are respectively and completely covered by a single battery, the frame body is communicated inside and outside.

In order to solve the technical problem, the following technical scheme is adopted in the application: the utility model provides a battery pack, includes a plurality of battery cells and at least one aforementioned bolster, a plurality of battery cells are arranged along setting for the direction, the bolster sets up along set for between the adjacent two battery cells of direction.

Compared with the prior art, the beneficial effect of this application is: when the buffer member is disposed between two adjacent single batteries, the space defined by the two single batteries and the buffer member is not a closed space. Therefore, when the single batteries are discharged and retracted, negative pressure cannot occur between the single batteries, and the retraction of the single batteries has no resistance, so that the service life of the battery pack is prolonged.

Drawings

Fig. 1 is a schematic structural diagram of a buffer according to an embodiment of the present application.

Fig. 2 is a schematic structural view of a buffer according to another embodiment of the present application.

Fig. 3 is a schematic structural view of a buffer according to another embodiment of the present application.

Fig. 4 is a schematic structural view of a buffer according to another embodiment of the present application.

Fig. 5 is a front view of a bumper according to another embodiment of the present application.

Fig. 6 is an exploded view of a battery pack including the buffer member shown in fig. 1.

Fig. 7 is an exploded view of a battery pack including the buffer member shown in fig. 3.

Fig. 8 is an exploded view of a battery pack containing the buffer member shown in fig. 5.

Wherein, 1, a buffer part; 11. a frame body; 121. an outer peripheral surface; 122. an inner peripheral surface; 123. plate surface; 13. a heat insulating pad; 150. a ventilation through hole; 151. a ventilation groove; 152. a notch; 2. a single battery; 3. an end plate; 4. a side plate; 5. a cover plate; 6. wire harness board assembly.

Detailed Description

In this application, it will be understood that terms such as "including" or "having," or the like, are intended to indicate the presence of the disclosed features, integers, steps, acts, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, acts, components, parts, or combinations thereof.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

The application is further described with reference to examples of embodiments shown in the drawings.

As shown in fig. 1 to 5, the present embodiment provides a cushion member 1 in a battery pack, including a frame 11, where the frame 11 has a flat plate shape, the frame 11 has an outer circumferential surface 121 and an inner circumferential surface 122 which are opposite to each other, and two opposite plate surfaces 123 connecting the outer circumferential surface 121 and the inner circumferential surface 122, and the frame is communicated inside and outside when the two plate surfaces 123 are completely covered by one single battery cell 2.

For example, in conjunction with fig. 1 and 6, the buffer member 1 may be applied to a battery pack and placed between two adjacent unit cells 2. The space defined by the buffer member 1 and the two unit cells 2 adjacent thereto is not a closed space. The inner space defined by the buffer member 1 and its adjacent two unit cells 2 communicates with the outer space through two vent through holes 150 (of course, one or more vent through holes 150 are also possible). Therefore, when the single batteries 2 are discharged and retracted, negative air pressure cannot occur between the single batteries 2, and the retraction of the single batteries 2 has no resistance, so that the service life of the battery pack is prolonged.

In some embodiments, referring to fig. 1 and 2, the frame 11 is substantially rectangular, i.e. the frame 11 may be a rectangular structure in case of neglecting manufacturing tolerances and the like. The frame 11 is provided with a ventilation through hole 150, and openings at both ends of the ventilation through hole 150 are provided on the outer circumferential surface 121 and the inner circumferential surface 122, respectively. The ventilation through hole 150 allows the frame 11 to communicate inside and outside. The ventilation through-holes 150 may be perpendicular to the inner circumferential surface 122. The ventilation through hole 150 may be inclined with respect to the inner circumferential surface 122. Even the ventilation through-holes 150 may be curved.

In some embodiments, referring to fig. 3, the frame 11 is rectangular, and the ventilation groove 151 is formed on at least one plate surface 123, and the ventilation groove 151 extends to the outer circumferential surface 121 and the inner circumferential surface 122.

The ventilation grooves 151 are formed in one plate surface 123 of the frame 11 shown in fig. 3, but it is needless to say that ventilation grooves are formed in both plate surfaces 123, and the number of ventilation grooves 151 in a single plate surface 123 is not limited to 1. The outer surface of the single battery 2 contacting the frame 11 is generally a plane, so that when the frame 11 and the single battery 2 are attached together, the single battery 2 and the frame 11 are separated from each other in the region where the ventilation groove 151 is located. In this way, a non-closed space is formed between the frame body 11 and the unit cell 2 with which it is in contact.

In the above embodiments, the frame 11 is still of a closed structure as a whole, while in the next two embodiments, the frame 11 is of an open structure.

In some embodiments, referring to fig. 4, the frame 11 has a gap 152, and the gap 152 connects the outer peripheral surface 121, the inner peripheral surface 122, and the two plate surfaces 123, wherein if the gap 152 is filled, the frame 11 is a closed frame 11. The surface of the notch 152 formed on the frame 11 may be perpendicular to the inner circumferential surface 122, or may obliquely intersect the inner circumferential surface 122, and the surface of the notch 152 formed on the frame 11 may be approximately a curved surface.

This corresponds to cutting a small section of the conventional rectangular frame 11 so that the frame 11 communicates inside and outside.

In some embodiments, referring to fig. 5, the frame 11 is U-shaped. Namely, the frame body 11 is connected by 3 sections of columnar materials to form a U shape.

In some embodiments, referring to fig. 2-5, the cushioning member 1 further includes an insulating mat 13 disposed on the inner peripheral surface 122.

In some embodiments, the thickness of the insulation mat 13 is less than the thickness of the frame 11.

The heat insulation pad 13 is used for insulating heat conduction between two adjacent single batteries 2, and the thickness of the heat insulation pad 13 is smaller than that of the frame body 11, so that an expansion space can be reserved for battery charging while heat insulation is achieved. The material of the heat insulating pad 13 is, for example, heat insulating cotton, soft rubber, foam or aerogel. These materials of the insulating mat 13 have a substantially negligible effect on the circulation of air between the inside and outside of the frame 11.

The material of the buffer frame can be selected from silicon rubber, metal, plastic, hard rubber, and the like. The material of the buffer frame may be relatively hard to avoid deformation by being pressed by the unit cells 2.

The embodiment of this application still provides a group battery, includes a plurality of battery cells 2 and at least one aforementioned bolster 1, and a plurality of battery cells 2 are arranged along setting for the direction, and bolster 1 sets up and is following set for between the adjacent two battery cells 2 of direction.

The buffer member 1 is applied to the battery pack, negative pressure between two adjacent single batteries 2 is avoided, and the service life of the battery pack is prolonged.

The above battery pack is, for example, a battery module or a battery pack.

Taking a battery module as an example, in order to assemble a plurality of single batteries 2 into a battery module, it is generally necessary to form a case enclosing the batteries by using a pair of end portions 3, a pair of side plates 4, a cover plate 5, and a bottom plate (not shown). Also shown in fig. 6 to 8 is the wire harness board assembly 6 in the battery module. The above can be designed according to the prior art, and the present application does not limit the design.

In some embodiments, a battery pack is assembled from a plurality of battery modules. In other embodiments, a plurality of single batteries 2 are directly assembled into a battery pack.

The embodiments in the present application are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments.

The protective scope of the present application is not limited to the above-described embodiments, and it is apparent that various modifications and variations can be made to the present application by those skilled in the art without departing from the scope and spirit of the present application. It is intended that the present application also include such modifications and variations as come within the scope of the appended claims and their equivalents.

Claims (8)

1. The buffer piece (1) in the battery pack is characterized by comprising a frame body (11), wherein the frame body (11) is in a flat plate shape, the frame body (11) is provided with an outer peripheral surface (121) and an inner peripheral surface (122) which are opposite to each other, and two opposite plate surfaces (123) which connect the outer peripheral surface (121) and the inner peripheral surface (122), and when the two plate surfaces (123) are completely covered by one single battery (2), the frame body is communicated with the inside and the outside.

2. The buffer member (1) according to claim 1, wherein the frame body (11) is rectangular, a ventilation through hole (150) is formed in the frame body (11), and openings at two ends of the ventilation through hole (150) are respectively formed in the outer circumferential surface (121) and the inner circumferential surface (122).

3. The buffer (1) according to claim 1, wherein the frame (11) is rectangular, and a ventilation groove (151) is formed in at least one of the plate surfaces (123), and the ventilation groove (151) extends to the outer circumferential surface (121) and the inner circumferential surface (122).

4. The cushioning element (1) according to claim 1, wherein the frame (11) has a notch (152), the notch (152) connecting the outer circumferential surface (121), the inner circumferential surface (122), and the two plate surfaces (123), wherein the frame (11) is a closed frame (11) if the notch (152) is physically filled.

5. The buffer (1) according to claim 1, wherein said frame (11) is U-shaped.

6. The buffer (1) according to claim 1, wherein said buffer (1) further comprises a thermal insulation pad (13) arranged on said inner circumferential surface (122).

7. A battery pack, characterized in that it comprises a plurality of single cells (2) and at least one buffer member (1) according to any one of claims 1 to 6, said plurality of single cells (2) being aligned along a set direction, said buffer member (1) being arranged between two single cells (2) adjacent along said set direction.

8. The battery pack according to claim 7, wherein the battery pack is a battery module or a battery pack.

Images