CN219286525U

CN219286525U - Soft packet of electric core and battery package

Info

Publication number: CN219286525U
Application number: CN202223599668.1U
Authority: CN
Inventors: 胡玥; 丁佩岭; 王海龙
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-06-30
Anticipated expiration: 2032-12-29

Abstract

The utility model provides a soft package battery core and a battery pack, wherein the soft package battery core comprises a pole group, pole lugs arranged at two ends of the pole group in the length direction, and protective frames respectively penetrating through the two pole lugs and sleeved at two ends of the pole group in the length direction; the fender bracket comprises side protection parts which are sleeved on the pole group and are arranged along the width direction of the pole group, and corner protection parts which are arranged at two ends of the side protection parts, wherein the side protection parts are used for preventing an aluminum plastic film corresponding to a welding area of the pole group and the pole lug from being damaged, and the corner protection parts are used for preventing corners of the pole group from being damaged. According to the soft-package battery cell, the protection frames are sleeved at the two ends of the pole group in the length direction, and the protection frames comprise the side protection parts and the corner protection parts, so that electrolyte leakage caused by damage of an aluminum-plastic film corresponding to a welding area of the pole group and the pole lug can be prevented, or the corner of the pole group is damaged due to stress sinking of the local position of the aluminum-plastic film, and adverse effects on the safety performance of the battery cell are caused.

Description

Soft packet of electric core and battery package

Technical Field

The utility model relates to the technical field of battery cells, in particular to a soft-package battery cell. Meanwhile, the utility model also relates to a battery pack.

Background

The soft package battery has the advantages of good safety performance, light weight, high energy density and the like, and is applied to various industries. The soft package battery takes the aluminum plastic film as a shell, plays a role in protecting the internal structure of the battery, and meanwhile, the aluminum plastic film can also prevent the leakage of the electrolyte in the battery.

However, the aluminum-plastic film is soft in texture and easy to deform after being subjected to external force, particularly 4 corners of the square soft-package battery cell are easy to collide in the process of manufacturing the battery cell and the transportation process, so that the positions of the 4 corners of the battery cell are sunken to influence the appearance of the battery cell, and meanwhile, the battery cell electrode group in the aluminum-plastic film is possibly damaged due to the sunken structure. In addition, there is the metal burr in the utmost point group and utmost point ear welded area, can abrade the shell plastic-aluminum membrane in this region in the soft packet of battery use, leads to the battery to take place to corrode the weeping, and produces harmful effects to the security performance of electric core.

Disclosure of Invention

In view of the above, the present utility model is directed to a soft-package battery cell, so as to facilitate improving the safety performance of the battery cell.

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

a soft package battery core comprises a pole group, pole lugs arranged at two ends of the pole group in the length direction, and protective frames penetrating through the two pole lugs and sleeved at two ends of the pole group in the length direction;

the protection frame comprises side protection parts which are sleeved on the pole group and arranged along the width direction of the pole group, and corner protection parts which are arranged at two ends of the side protection parts, wherein the side protection parts are used for preventing an aluminum plastic film corresponding to a welding area of the pole group and the pole lug from being damaged, and the corner protection parts are used for preventing corners of the pole group from being damaged.

Further, in the thickness direction of the pole group, the side protection part comprises two side protection plates which are oppositely arranged, the two side protection plates are partially arranged on the upper side and the lower side of the welding area, and the welding area can be prevented from being contacted with the aluminum plastic film under the blocking of the two side protection plates.

Further, the tab is provided with tab glue, and in the width direction of the tab group, the length dimension of the side protection plate is greater than the length dimension of the tab glue.

Further, in the width direction of the pole group, the difference between the length dimension of the side protection plate and the length dimension of the tab adhesive is between 0 and 1 mm.

Further, the corner protecting part comprises a cover body matched with the corner of the pole group, and the cover body is covered on the corner of the pole group.

Further, the thickness dimension of the side protection plate and/or the thickness dimension of the cover body is between 50um and 100 um.

Further, the cover body comprises an end plate connected with the two side protection plates, a top plate and a bottom plate which are respectively arranged at two ends of the end plate along the thickness direction of the electrode group, and a side plate which is arranged at one side of the end plate, far away from the two side protection plates; the end plate is attached to the end part of the pole group in the length direction, the top plate and the bottom plate are attached to the top and the bottom of the pole group in the thickness direction respectively, the side plate is attached to the side part of the pole group in the width direction, and smooth transition is realized between the side plate and the end plate.

Further, in the length direction of the pole group, the width dimension of the top plate and the bottom plate is between 5mm and 10 mm.

Furthermore, the protection frame is made of at least one of polypropylene material and polyethylene material.

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

according to the soft-package battery core, the protection frames are sleeved at the two ends of the pole group in the length direction, and the protection frames comprise the side protection parts and the corner protection parts, so that electrolyte leakage caused by damage of an aluminum-plastic film corresponding to a welding area of the pole group and the pole lug can be prevented, or the corner of the pole group is damaged due to stress sinking of the local position of the aluminum-plastic film, and adverse effects on the safety performance of a battery can be prevented.

In addition, the width dimension of the top plate and the bottom plate is between 5mm and 10mm, so that the cover body has a larger protection range, and a better protection effect is realized on the corners of the pole group.

In addition, the protection frame is made of at least one of polypropylene material and polyethylene material, so that the protection frame has better insulativity and electrolyte corrosion resistance and has certain puncture resistance strength.

Another object of the present utility model is to propose a battery pack comprising a soft pack cell as described above.

The battery pack provided by the utility model is beneficial to improving the safety performance of the battery pack by arranging the soft-pack battery core.

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 front view of a pole set according to an embodiment of the present utility model;

FIG. 2 is a side view of a pole set according to an embodiment of the present utility model;

fig. 3 is a schematic structural view of a protective frame according to an embodiment of the utility model.

Reference numerals illustrate:

1. a pole group; 2. a tab; 3. a protective frame; 301. a side protection part; 3011. a side shield; 302. a corner guard; 3021. an end plate; 3022. a top plate; 3023. a bottom plate; 3024. a side plate; 4. and (5) tab glue.

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 embodiment relates to a soft-package battery core, which is integrally formed and comprises a pole group 1, pole lugs 2 arranged at two ends of the pole group 1 in the length direction, and protective frames 3 respectively penetrating through the two pole lugs 2 and sleeved at two ends of the pole group 1 in the length direction. And the protection frame 3 comprises side protection parts 301 sleeved on the pole group 1 and arranged along the width direction of the pole group 1, and corner protection parts 302 arranged at two ends of the side protection parts 301, wherein the side protection parts 301 are used for preventing an aluminum plastic film corresponding to a welding area of the pole group 1 and the pole lug 2 from being damaged, and the corner protection parts 302 are used for preventing corners of the pole group 1 from being damaged.

Based on the above overall description, as a preferred embodiment, as shown in fig. 1 to 3, in this embodiment, in the thickness direction of the pole group 1, the side protection portion includes two side protection plates 3011 that are oppositely arranged, the two side protection plates 3011 are respectively disposed on the upper and lower sides of the welding area, and under the blocking of the two side plate 3024 protection plates, the welding area can be prevented from contacting with the plastic-aluminum film, so that the plastic-aluminum film corresponding to the welding area is prevented from being damaged by the metal burrs of the welding area, thereby causing the soft battery cell to generate corrosion leakage.

As shown in fig. 1 and 2, the tab 2 is provided with a tab adhesive 4, and the length dimension of the side protection plate 3011 is greater than the length dimension of the tab adhesive 4 in the width direction of the pole group 1. Preferably, the difference between the length dimension of the side shield plate 3011 and the length dimension of the tab adhesive 4 in the width direction of the pole group 1 is between 0-1mm, and it may be specifically 0, 0.3mm, 0.5mm, 0.8mm, 1mm, and the like. In this way, the protection frame 3 can be conveniently installed to a designated position after passing through the tab 2.

As shown in fig. 1 and 3, the corner protection portion 302 includes a cover body adapted to the corner of the pole set 1, and the cover body is covered on the corner of the pole set 1 to protect the corner of the pole set 1 from damage of the internal pole set 1 caused by the recess of the corner of the battery cell due to damage of the soft package battery cell during the process of transferring or transporting.

In addition, in this embodiment, the thickness of the side shield 3011 and the thickness of the cover are both between 50um and 100um, so that the side shield 301 and the cover have a certain structural strength. Of course, the arrangement of the side shield 301 and the cover within the above-described size range is only one preferred embodiment, and the thickness of the side shield 301 or the cover may be set to other sizes as required.

Still as a preferred embodiment, in this embodiment, the cover body includes an end plate 3021 connected to the two side protection plates 3011, a top plate 3022 and a bottom plate 3023 provided at both ends of the end plate 3021 in the thickness direction of the pole group 1, and a side plate 3024 provided at a side of the end plate 3021 remote from the two side protection plates 3011. The end plate 3021 is attached to the end of the pole group 1 in the length direction, the top plate 3022 and the bottom plate 3023 are attached to the top and the bottom of the pole group 1 in the thickness direction respectively, the side plate 3024 is attached to the side of the pole group 1 in the width direction, and the side plate 3024 and the end plate 3021 are in smooth transition, so that protection of the corners of the pole group 1 is facilitated.

In addition, in the present embodiment, the width dimensions of the top plate 3022 and the bottom plate 3023 in the length direction of the pole group 1 are preferably between 5mm and 10mm, which may specifically be 5mm, 6mm, 7mm, 9mm, 10mm, etc., so as to make the cover have a larger protection range and achieve a better protection effect on the corners of the pole group 1.

In addition, the protection frame 3 in this embodiment may be preferably made of at least one of polypropylene and polyethylene, so that the protection frame 3 has better insulation and electrolyte corrosion resistance, and also has a certain puncture resistance strength.

According to the soft package battery cell of the embodiment, the protection frame 3 is sleeved at the two ends of the pole group 1 in the length direction, and the protection frame 3 comprises the side protection part 301 and the corner protection part 302, so that electrolyte leakage caused by damage to an aluminum plastic film corresponding to a welding area of the pole group 1 and the pole lug 2 can be prevented, or the corner of the pole group 1 is damaged due to stress depression of the local position of the aluminum plastic film, and adverse effects on the safety performance of a battery can be generated.

Example two

The present embodiment relates to a battery pack including the soft pack cell of the first embodiment.

The battery pack of the embodiment is beneficial to improving the safety performance of the battery pack by being provided with the soft pack battery core in the first embodiment.

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

1. The utility model provides a soft packet of electric core which characterized in that:

the electrode plate comprises a pole group, pole lugs arranged at two ends of the pole group in the length direction, and protective frames respectively penetrating through the two pole lugs and sleeved at two ends of the pole group in the length direction;

2. The soft pack cell of claim 1, wherein:

in the thickness direction of the pole group, the side protection part comprises two side protection plates which are oppositely arranged, the two side protection plates are partially arranged on the upper side and the lower side of the welding area, and the welding area can be prevented from being contacted with the aluminum plastic film under the blocking of the two side protection plates.

3. The soft pack cell of claim 2, wherein:

the pole lug is provided with pole lug glue, and the length dimension of the side protection plate is larger than the length dimension of the pole lug glue in the width direction of the pole group.

4. A soft pack cell according to claim 3, wherein:

in the width direction of the pole group, the difference between the length dimension of the side protection plate and the length dimension of the tab adhesive is between 0 and 1 mm.

5. The soft pack cell of claim 2, wherein:

the corner protection part comprises a cover body matched with the corner of the pole group, and the cover body is covered on the corner of the pole group.

6. The soft pack cell of claim 5, wherein:

the thickness dimension of the side protection plate and/or the thickness dimension of the cover body is between 50um and 100 um.

7. The soft pack cell of claim 5, wherein:

the cover body comprises end plates connected with the two side protection plates, a top plate and a bottom plate which are respectively arranged at two ends of the end plates along the thickness direction of the electrode group, and side plates arranged at one side of the end plates, which is far away from the two side protection plates;

the end plate is attached to the end part of the pole group in the length direction, the top plate and the bottom plate are attached to the top and the bottom of the pole group in the thickness direction respectively, the side plate is attached to the side part of the pole group in the width direction, and smooth transition is realized between the side plate and the end plate.

8. The soft pack cell of claim 7, wherein:

the width dimension of the top plate and the bottom plate in the length direction of the pole group is between 5mm and 10 mm.

9. The soft pack cell of any one of claims 1 to 8, wherein:

the protection frame is made of at least one of polypropylene material and polyethylene material.

10. A battery pack, characterized in that:

comprising a soft pack cell according to any one of claims 1 to 9.