CN212725471U - Battery pack and terminal - Google Patents

Abstract

The present disclosure relates to a battery pack and a terminal, the battery pack including: an electric core; and the buffer strips have the deformation capacity and are respectively positioned at the two ends of the battery cell. This openly sets up the buffering strip respectively at the both ends of electric core, utilizes the deformability of buffering strip to absorb the impact force that external force brought for electric core, has reduced the problem that the electric core crest rush out the weeping, the impaired short circuit of pole piece.

Description

Battery pack and terminal

Technical Field

The disclosure relates to the field of machinery, in particular to a battery pack and a terminal.

Background

With the advent of the 5G (5th generation wireless systems, fifth generation communication technology), the capacity of batteries is continuously increased, the weight is heavier and heavier, once a safety problem occurs, the damage to people is more serious, and terminals such as mobile phones are used as necessities in life of people, the use environment and scenes are different, and the long-term reliability of the batteries in the mobile phones is guaranteed to be extremely important in extreme use environments.

Batteries generally include an enclosure and a cell within the enclosure. When the battery is impacted by external force under the unexpected conditions of falling and the like, the battery core can shift in the packaging shell and be impacted, so that the serious safety problems of peak-to-peak liquid leakage, damaged pole pieces, short circuit and the like are caused.

SUMMERY OF THE UTILITY MODEL

The present disclosure provides a battery pack and a terminal.

According to a first aspect of embodiments of the present disclosure, there is provided a battery pack including:

an electric core;

and the buffer strips have the deformation capacity and are respectively positioned at the two ends of the battery cell.

In some embodiments, the battery pack further comprises:

and the colloid is used for fixing the battery cell and the buffer strip.

In some embodiments, the battery pack further comprises:

and the packaging shell is coated outside the battery cell, the buffer strip and the colloid and is bonded with the colloid.

In some embodiments, the battery pack further comprises:

the easy-to-tear tape is bonded outside the packaging shell and comprises a first area and a second area;

the bonding force between the second area and the packaging shell is larger than that between the first area and the packaging shell; and the second area is positioned in an area outside the colloid fixed on the packaging shell.

In some embodiments, the middle region of the adhesive body is recessed, and the recess and the package casing form a space for accommodating the second region of the easy-to-tear tape.

In some embodiments, the gel is i-shaped.

In some embodiments, the gel comprises a hot melt adhesive.

In some embodiments, the battery pack further comprises:

and the lug is connected to the battery core and penetrates through the buffer strip to be exposed outside the battery pack.

In some embodiments, the battery pack further comprises:

and the electrode liquid is filled in the packaging shell, and the battery core is soaked in the electrode liquid.

In some embodiments, the battery pack further comprises:

and the release film is coated outside the easy-to-tear tape and is bonded with the easy-to-tear tape.

According to a second aspect of the embodiments of the present disclosure, there is provided a terminal, including:

the battery pack according to any of the above embodiments;

the casing has the battery compartment, the battery package is installed in the battery compartment.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

according to the embodiment, the buffer strips are arranged at the two ends of the battery cell respectively, the impact force brought to the battery cell by the external force is absorbed by the deformation capacity of the buffer strips, and the problems of leakage of the battery cell when the battery cell is opened by the peak and short circuit of the pole piece is damaged are reduced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is one of schematic structural views of a battery pack shown according to an exemplary embodiment;

fig. 2 is a second schematic structural view of a battery pack according to an exemplary embodiment;

fig. 3 is a third schematic structural diagram of a battery pack according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of devices consistent with certain aspects of the present disclosure, as detailed in the appended claims.

In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in fig. 2 and 3.

The disclosed embodiment provides a battery pack, including:

a battery cell 110;

the buffer strips 120 have deformation capability and are respectively located at two ends of the battery cell 110.

In the embodiment of the present disclosure, the buffer strips 120 are respectively disposed at two ends of the battery cell 110, and the deformation capability of the buffer strips 120 is utilized to absorb the impact force brought to the battery cell 110 by the external force, so as to reduce the problems of the battery cell 110 that the top peak is flushed away from the leakage and the pole piece is damaged and short-circuited.

Generally, as shown in fig. 1, in the process of an impact on a battery cell 110, a tensile force applied to the battery cell 110 is greater than a supporting force of an outer surface of a pole piece, so that all impact forces are concentrated on the head of the battery cell 110, the head of the battery cell 110 is more likely to cause serious safety problems such as a peak-to-peak flushing leakage, and the like, and the buffer strips 120 are arranged at two ends of the battery cell 110, so that a protection effect on the battery cell 110 is effectively improved.

Without limitation, the cross-sectional area of the bumper strip 120 may be consistent with the end area of the cell 110. The material of the buffer strip 120 includes, but is not limited to, high molecular resin materials such as ethylene-vinyl acetate copolymer (EVA), Polyethylene (PE), Polypropylene (PP), or Polyvinyl chloride (PVC). Such materials may be materials having foaming properties, and/or elastic properties.

In other optional embodiments, the battery pack further comprises:

and the colloid 130 is used for fixing the battery cell 110 and the buffer strip 120.

As shown in fig. 1 and 2, the head and the tail of the gel 130 are respectively connected to the buffer strip 120, and the middle of the gel 130 is attached to the battery cell 110. Through setting up colloid 130, strengthened electric core 110 and buffering strip 120's wholeness, prevented that buffering strip 120 from breaking away from electric core 110, can further improve the reliability to electric core 110's guard action.

The gel 130 includes, without limitation, a hot melt adhesive. The hot melt adhesive is solid at room temperature, and has an adhesive effect after being heated and melted into liquid. In addition, the gel 130 may be an adhesive tape, which generally includes a substrate and an adhesive coated on the surface of the substrate. Adhesives include, but are not limited to, acrylate adhesives or epoxy adhesives.

In other optional embodiments, the battery pack further comprises:

and the packaging shell 140 is coated outside the battery cell 110, the buffer strip 120 and the colloid 130 and is bonded with the colloid 130.

Generally, a gap is formed between the battery cell 110 and the package casing 140, the battery cell 110 is easy to move in the package casing 140, the battery cell 110 generally includes a diaphragm formed by winding, the moving battery cell 110 can cause pulling of the pole piece, and the pole piece can be torn in a serious case, resulting in a short circuit risk. The colloid 130 is bonded and fixed with the battery cell 110 through the inner surface and is also bonded and fixed with the packaging shell 140 through the outer surface, so that the connection between the battery cell 110 and the packaging shell 140 is enhanced, the relative position between the battery cell 110 and the packaging shell 140 is reinforced, and the moving degree of the battery cell 110 in the packaging shell 140 due to external force impact is weakened.

And by combining the buffering effect of the buffering strip 120, at the moment of impact, the buffering strip 120 and the colloid 130 can convert the impact force into the sum of the supporting force of the top of the electric core 110 and the supporting force of the packaging shell 140 to the electric core 110, so that the instant impact force of the electric core 110 is further reduced, and the reliability of the battery pack is improved.

As shown in fig. 3, the encapsulating case 140 is located outside the battery cell 110, and the cushion strip 120 and the gel 130 are also disposed inside the encapsulating case 140 along with the battery cell 110. One battery cell 110 or more than two battery cells 110 may be disposed in the encapsulating case 140 as required.

The buffer strip 120 and the gel 130 may be disposed on each cell 110. The buffer strip 120 may be specifically attached to the end of the battery cell 110; or attached inside the packaging case 140 and opposite to the end of the battery cell 110.

The package 140 may be a thin film such as an aluminum-plastic film, or may be a hard case such as metal, alloy, or plastic.

In other optional embodiments, the battery pack further comprises:

a peel strip 160 adhered to the exterior of the package 140 and including a first region 161 and a second region 162;

the adhesion between the second region 162 and the package shell 140 is greater than the adhesion between the first region 161 and the package shell 140.

In one embodiment, the first region 161 is located at the edge of the second region 162, and the adhesion force of the first region 161 is smaller, so that the first region 161 can be more easily torn from the package shell 140, and the torn first region 161 can be used to bring the second region 162 away from the package shell 140 more easily.

In some embodiments, the second region 162 is located in a region of the package housing 140 other than the fixing gel 130.

The second region 162 is a strong connection region with the package 140, and the second region 162 is disposed at a position offset from the glue 130. As shown in fig. 3, the position of the gel 130 in the package 140 is shown in dashed lines in fig. 3. The glue body 130 is positioned inside the package 140, the second region 162 is positioned outside the package 140, and the glue body 130 and the second region 162 are not overlapped in the thickness direction of the package 140. This kind of positional relationship of colloid 130 and second region 162 is receiving the moment of assaulting, and the impact force can not direct action on the pole piece of electric core 110, but passes through the deformation transmission of packaging shell 140, can effectively reduce the second region 162 in the impact process and directly pull the power to the pole piece of inside electric core 110 through colloid 130 to effectively reduce the torn risk of pole piece.

Therefore, the easy-to-tear sticker 160 and the colloid 130 have the mutual supporting effect, so that the external force impact received by the pole piece in the battery pack under the situations of falling of the whole battery and the like is relieved, and the reliability of the large-capacity battery is effectively improved.

If the tearing tape is wrapped around the enclosure 140, aligning or overlapping the glue 130 and the second region 162 will not facilitate the enclosure 140 to deform favorably to absorb impact energy, resulting in the risk of tearing the pole piece.

The easy-to-tear sticker 160 is located outside the packaging case 140 for facilitating the installation or disassembly of the battery pack. The adhesion between the first region 161 and the package housing 140 may be 0, i.e. no adhesive is provided between the first region 161 and the package housing 140. Alternatively, the adhesive force can be reduced by reducing the adhesive area of the adhesive between the first region 161 and the package housing 140. The first region 161 serves as a weak glue region and may be used as a hand tear location. When the battery pack is disassembled, the entire easy-to-tear sticker 160 can be disassembled from the package case 140 by using the separated first region 161 from the glass first region 161.

In other alternative embodiments, the recess 131 in the middle region of the adhesive 130, the recess 131 and the package housing 140 form a space for accommodating the second region 162 of the easy-tear tape 160.

The avoiding design of the recess 131 also reserves more space between the colloid 130 and the second region 162, so that the colloid 130 is prevented from being too close to the second region 162 due to thermal expansion, which is not beneficial to the packaging shell 140 to generate favorable deformation and absorb impact energy. As shown in fig. 3, the colloid 130 is spaced from the second region 162. In addition, the recess 131 of the glue body 130 is designed as a clearance, so that more installation space can be reserved on the package shell 140 for the easy-to-tear sticker 160. In order to further facilitate the assembly of the battery pack, the gel 130 is located on the central axis of the electric core 110, and the recesses 131 on the left and right sides of the gel 130 are symmetrically disposed.

Without limitation, the gel 130 is i-shaped, as shown in fig. 2 and 3. The colloid 130 is in an I shape, the head and tail of the battery cell 110 are combined with the wider part of the colloid 130, the battery cell 110 can be effectively pulled under the impact force, and the risk of pole piece fracture is reduced.

In other optional embodiments, the battery pack further comprises:

and the tab 150 is connected to the battery cell 110, and the tab 150 penetrates through the buffer strip 120 and is exposed outside the battery pack.

Generally, the tab 150 includes at least two. As shown in fig. 1 to 3, a plurality of tabs 150 may be disposed at the same end of the battery cell 110, or a plurality of tabs 150 may be disposed at two ends of the battery cell 110, respectively.

In other optional embodiments, the battery pack further comprises:

and the electrode liquid is filled in the packaging shell 140, and the battery cell 110 is immersed in the electrode liquid.

The electrode liquid is a carrier for ion transmission in the battery. After the battery cell 110 is packaged by the packaging shell 140, electrode solution can be injected into the packaging shell 140 through the reserved injection hole, and the battery cell 110 and the electrode solution are sufficiently soaked, so that the normal operation of the battery pack is ensured.

In other optional embodiments, the battery pack further comprises:

and the release film is coated outside the easy-to-tear sticker 160 and is bonded with the easy-to-tear sticker 160.

The release film can be used as the outermost layer structure of the battery pack. The release film and the easy-to-tear sticker 160 have weaker bonding force, and the weaker bonding force can be realized by selecting the release film material. When a battery pack needs to be installed in a terminal such as a mobile phone, the release film can be torn off, and the battery pack can be fixed by using the adhesive on the outer surface of the easy-to-tear tape 160.

An embodiment of the present disclosure further provides a terminal, where the terminal includes:

the battery pack according to any of the above embodiments;

the casing has the battery compartment, and the battery package is installed in the battery compartment.

The shape of the battery compartment is the same as that of the battery pack, and the volume of the battery compartment is equal to that of the battery pack or slightly larger than that of the battery pack. When placing the battery package in the battery compartment, can utilize and tear off from the type membrane after, easily tear the adhesive that pastes 160 surface and bond fixedly with the battery compartment inner wall. Furthermore, the terminal can be provided with corresponding seat buckles and other mechanical parts to further strengthen the fixation of the battery pack.

The terminal includes but is not limited to a mobile phone, a tablet computer, a notebook computer or a wearable device.

In a specific example, the terminal is a mobile phone. Buffer strips 120 are respectively added at the head and the tail of the bare cell 110 (namely, at two ends of the cell 110), the tab 150 penetrates through the buffer strips 120, and one side of the buffer strips 120 is bonded with the hot melt adhesive. The buffer strip 120 is made of EVA material or other polymer resin material. The buffer strip 120 can properly expand by absorbing the liquid volume of the electrode, thereby playing a buffer role. Buffering strip 120 has effectively alleviated electric core 110 and has upwards and the atress of impact in-process downwards, and inside electric core 110 uses the hot melt adhesive fixed, and the hot melt adhesive is the I shape, and upper and lower both ends bond with buffering strip 120 respectively, and the middle part bonds with naked electric core 110 body. The other side of the hot melt adhesive is bonded with the aluminum plastic film (Pouch) of the battery core 110. The hot melt adhesive can fix the relative position of the buffer strip 120 and the battery cell 110, and the battery cell 110 can be guaranteed to be impacted in the up-down process and can be effectively buffered. Meanwhile, the I-shaped hot melt adhesive can effectively increase the contact perimeter of the surface of the battery cell 110, so that the risk of breakage of the internal pole piece is reduced.

In summary, the technical scheme of the embodiment of the disclosure can improve the impact resistance of the battery pack with large capacity and heavy weight and the battery pack with long strip shape; the safety risk of short circuit caused by the tearing of the pole piece of the battery cell 110 is reduced.

Features disclosed in several of the product embodiments provided in the present application may be combined in any combination to yield new product embodiments without conflict.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (11)

1. A battery pack, comprising:

an electric core;

and the buffer strips have the deformation capacity and are respectively positioned at the two ends of the battery cell.

2. The battery pack of claim 1, further comprising:

and the colloid is used for fixing the battery cell and the buffer strip.

3. The battery pack according to claim 2, further comprising:

and the packaging shell is coated outside the battery cell, the buffer strip and the colloid and is bonded with the colloid.

4. The battery pack of claim 3, further comprising:

the easy-to-tear tape is bonded outside the packaging shell and comprises a first area and a second area;

the bonding force between the second area and the packaging shell is larger than that between the first area and the packaging shell; and the second area is positioned in an area outside the colloid fixed on the packaging shell.

5. The battery pack of claim 4, wherein the middle region of the gel is recessed, and the recess and the packaging shell form a space for accommodating the easy-to-tear second region.

6. The battery pack of claim 2 or 5, wherein the gel is I-shaped.

7. The battery pack of claim 2, wherein the gel comprises a hot melt adhesive.

8. The battery pack of claim 1, further comprising:

and the lug is connected to the battery core and penetrates through the buffer strip to be exposed outside the battery pack.

9. The battery pack of claim 3, further comprising:

and the electrode liquid is filled in the packaging shell, and the battery core is soaked in the electrode liquid.

10. The battery pack according to claim 4, further comprising:

and the release film is coated outside the easy-to-tear tape and is bonded with the easy-to-tear tape.

11. A terminal, comprising:

the battery pack according to any one of claims 1 to 10;

the casing has the battery compartment, the battery package is installed in the battery compartment.

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