CN216288861U - Battery pack - Google Patents

Abstract

The present invention provides a battery pack including: a cell body; the lug is arranged on the side end face of the battery cell body and is connected with the battery cell body; the pole assembly comprises a pole and a connecting bracket, the pole is arranged on the connecting bracket, and the connecting bracket is connected with the pole lug; wherein at least part of the connecting bracket is arranged in a bendable way. The utility model solves the problem of low battery yield in the prior art.

Description

battery pack

technical field

The utility model relates to the technical field of battery structure design, in particular to a battery assembly.

Background technique

At present, with the continuous development of the new energy industry, taking batteries as an example, square batteries account for a high proportion of the market due to their good safety performance.

However, in the production process of the existing square battery, the top side of the battery is relatively thick due to the thickness of the cover plate and the thickness of the plastic parts protecting the tabs, so that most of the space on the top side is wasted. deformation, which in turn leads to a substantial increase in the defective rate during the battery manufacturing process, reducing the yield of the battery.

Utility model content

The main purpose of the present invention is to provide a battery assembly to solve the problem of low yield of batteries in the prior art.

In order to achieve the above purpose, the present invention provides a battery assembly, comprising: a battery core body; a pole lug, which is arranged on the side end face of the battery core body and connected with the battery core body; a pole assembly, the pole assembly includes a pole and a connecting bracket, the pole post is installed on the connecting bracket, and the connecting bracket is connected with the pole ear; wherein, at least part of the connecting bracket can be bent.

Further, the connection bracket includes: a support, the pole is installed on the end of the support; a connection is installed on the side of the support, the connection is connected with the tab, and the connection is bendable relative to the support.

Further, the connector includes: a first metal sheet layer, the first metal sheet layer includes one or more first metal sheets, and the plurality of first metal sheets are sequentially stacked and connected to each other; wherein, the first metal sheet layer is connected to The extension directions of the supports are the same.

Further, the battery assembly further includes: a folding frame, two ends of the folding frame are respectively connected with the tabs and the battery core body, and the folding frame is foldably arranged to make the tabs fit with the battery core body, or make the tabs face away from The direction of the cell body is open.

Further, the tab includes: a second metal sheet layer, the second metal sheet layer includes one or more second metal sheets, a plurality of second metal sheets are stacked in sequence and connected to each other, and the connecting bracket and the second metal sheet layer connect.

Further, the battery assembly further includes: a casing, the battery core body is installed in the casing, and an installation opening is provided on the casing; and an explosion-proof component is installed at the installation opening.

Further, the housing includes: a top plate, the installation opening is provided on the top plate, and the explosion-proof component is connected to the top plate.

Further, the explosion-proof component includes an explosion-proof plate, and an explosion-proof groove is provided on the explosion-proof plate.

Further, the height of the casing is 60mm to 200mm; and or the length of the casing is 100mm to 1500mm, and/or the thickness of the casing is 10mm to 50mm.

Further, the battery assembly further includes: an insulating layer disposed between the tabs and the casing, and two opposite end faces of the insulating layer are respectively attached to the tabs and the casing.

Applying the technical solution of the present utility model, the battery assembly includes a cell body, a tab and a pole assembly, the tab is arranged on the side end face of the cell body and is connected with the cell body, and the pole assembly includes a pole and a connecting bracket, The pole post is installed on the connection bracket, and the connection bracket is connected with the pole ear; wherein, at least part of the connection bracket can be bent. In this way, in the process of assembling the battery, since the connecting bracket can be bent, the flexibility of connecting the connecting bracket and the tab is increased, and it is not easy to be broken during the connection between the connecting bracket and the tab. It can reduce the overall volume of the battery assembly, reduce the deformation of the cover plate and other problems, and improve the yield of battery production.

Description of drawings

The accompanying drawings forming a part of the present application are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

FIG. 1 shows a structural exploded view of an embodiment of a battery assembly according to the present invention;

FIG. 2 shows a schematic structural diagram of a cell body of a battery assembly according to the present invention.

Wherein, the above-mentioned drawings include the following reference signs:

1. The battery core body; 2. The pole ear; 3. The pole assembly; 30, the pole; 31, the connecting bracket; 310, the supporting piece; 311, the connecting piece; 20. Second metal sheet layer; 5. Housing; 50. Top plate; 6. Explosion-proof parts.

Detailed ways

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and/or combinations thereof.

It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that data so used may be interchanged under appropriate circumstances such that the embodiments of the application described herein can, for example, be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

Please refer to FIG. 1 to FIG. 2 , the utility model provides a battery assembly, including: a battery core body 1; a pole lug 2, which is arranged on the side end surface of the battery core body 1 and connected to the battery core body 1; a pole assembly 3. The pole assembly 3 includes a pole 30 and a connecting bracket 31. The pole 30 is mounted on the connecting bracket 31, and the connecting bracket 31 is connected with the pole tab 2; wherein, at least part of the connecting bracket 31 is foldable.

The battery assembly provided according to the present invention includes a cell body 1 , a tab 2 and a pole assembly 3 . The tab 2 is arranged on the side end surface of the cell body 1 and is connected to the cell body 1 , and the pole assembly 3 includes The pole 30 and the connecting bracket 31, the pole 30 is installed on the connecting bracket 31, and the connecting bracket 31 is connected with the pole tab 2; wherein, at least part of the connecting bracket 31 is foldable. In this way, in the process of assembling the battery, since the connecting bracket 31 can be bent, the flexibility of the connection between the connecting bracket 31 and the tab 2 is increased, and it is not easy to be broken during the connection between the connecting bracket 31 and the tab 2. 31 can be bent, and can also reduce the overall volume of the battery assembly, reduce the deformation of the cover plate and other problems, and improve the yield of battery production.

Specifically, the connection bracket 31 includes: a support member 310, the pole post 30 is installed on the end of the support member 310; a connection member 311 is installed on the side surface of the support member 310, the connection member 311 is connected with the pole tab 2, and the connection member 311 is opposite to The support member 310 can be bent. The pole 30 is supported by the support member 310, and at the same time, the pole 30 and the connecting member 311 are conducted through the support member 310. After the connecting member 311 is connected to the tab 2, the current at the tab 2 can be conducted. to the pole 30.

In the specific implementation process, the connecting member 311 includes: a first metal sheet layer 3110, the first metal sheet layer 3110 includes one or more first metal sheets, and the plurality of first metal sheets are sequentially stacked and connected to each other; wherein , the extension direction of the first metal sheet layer 3110 and the support member 310 is consistent. The thickness of the first metal sheet is 0.1mm to 1.5mm, which has good ductility and is not easy to break after deformation or bending is found. The connection between them is more stable, which ensures the safety of the battery.

In the embodiment provided by the present invention, the battery assembly further includes: a folding frame 4, two ends of the folding frame 4 are respectively connected with the tab 2 and the battery body 1, and the folding frame 4 is foldably arranged so that the tab 2 Fit with the cell body 1 , or open the tab 2 in a direction away from the cell body 1 . When the tab 2 is opened relative to the cell body 1, the tab 2 is supported by the folding frame 4, so that the connector 311 and the tab 2 are welded. After the welding is completed, the tab 2 is folded over to make the tab 2 and the cell body 1 fit.

Specifically, the tab 2 includes: a second metal sheet layer 20, the second metal sheet layer 20 includes one or more second metal sheets, the plurality of second metal sheets are stacked in sequence and connected to each other, and the connecting bracket 31 is connected to the first metal sheet. The two metal sheet layers 20 are connected. Specifically, the thickness of the second metal sheet is 0.1 mm to 1.5 mm. The first metal sheet layer 3110 and the second metal sheet layer 20 cooperate with each other to achieve a stable connection between the tab 2 and the pole post 30 .

As shown in FIG. 1 , the battery assembly further includes: a casing 5 , in which the cell body 1 is installed, and an installation opening is provided on the casing 5 ; and an explosion-proof component 6 is installed at the installation opening. By setting the explosion-proof component 6 to protect the battery, the safety of the battery is improved.

Further, the housing 5 includes: a top plate 50 , an installation opening is provided on the top plate 50 , and the explosion-proof component 6 is connected to the top plate 50 . This arrangement can reduce the thickness of the top plate 50 during the manufacturing process, optimize the appearance and structure of the battery assembly, make full use of the space at the top of the casing 5, and improve the energy density level of the battery.

Wherein, the explosion-proof component 6 includes an explosion-proof plate, and an explosion-proof groove is provided on the explosion-proof plate. At the position where the explosion-proof plate is provided with the explosion-proof groove, the strength of the explosion-proof plate decreases. When the air pressure in the casing 5 gradually increases, the explosion-proof plate is torn at the explosion-proof groove, and the high-pressure gas is discharged to ensure the safety of the battery. .

In another embodiment provided by the present invention, there are a plurality of explosion-proof components 6 , and the plurality of explosion-proof components 6 are arranged at intervals around the circumference of the housing 5 .

In order to optimize the overall size of the battery and increase the energy density level of the battery, the height of the case 5 is 60mm to 200mm; and or the length of the case 5 is 100mm to 1500mm, and/or the thickness of the case 5 is 10mm to 50mm.

The battery assembly further includes: an insulating layer disposed between the tab 2 and the casing 5 , and two opposite end faces of the insulating layer are respectively attached to the tab 2 and the casing 5 . In this way, an effective and reliable insulation state is maintained between the tab 2 and the casing 5, and the safety performance of the battery is improved.

In the specific implementation, by extending the tabs 2 from the side of the cell body 1 , the size of the tabs 2 can be adjusted according to the actual required current carrying capacity to meet the actual needs. Extend to maximize space utilization and achieve a high energy density level of the package.

From the above description, it can be seen that the above-mentioned embodiments of the present utility model achieve the following technical effects:

The battery assembly provided according to the present invention includes a cell body 1 , a tab 2 and a pole assembly 3 . The tab 2 is arranged on the side end surface of the cell body 1 and is connected to the cell body 1 , and the pole assembly 3 includes The pole 30 and the connecting bracket 31, the pole 30 is installed on the connecting bracket 31, and the connecting bracket 31 is connected with the pole tab 2; wherein, at least part of the connecting bracket 31 is foldable. In this way, in the process of assembling the battery, since the connecting bracket 31 can be bent, the flexibility of the connection between the connecting bracket 31 and the tab 2 is increased, and it is not easy to be broken during the connection between the connecting bracket 31 and the tab 2. 31 can be bent, and can also reduce the overall volume of the battery assembly, reduce the deformation of the cover plate and other problems, and improve the yield of battery production.

For ease of description, spatially relative terms, such as "on", "over", "on the surface", "above", etc., may be used herein to describe what is shown in the figures. The spatial positional relationship of one device or feature shown to other devices or features. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or features would then be oriented "below" or "over" the other devices or features under other devices or constructions". Thus, the exemplary term "above" can encompass both an orientation of "above" and "below." The device may also be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. A battery assembly, characterized in that, comprising: battery core body (1); a tab (2), arranged on the side end face of the battery core body (1) and connected to the battery core body (1); A pole assembly (3), the pole assembly (3) comprising a pole (30) and a connecting bracket (31), the pole (30) being mounted on the connecting bracket (31), the connecting bracket (31) connected with the tab (2); Wherein, at least part of the connecting bracket (31) can be bent. 2. The battery assembly according to claim 1, wherein the connecting bracket (31) comprises: a support piece (310), the pole post (30) is mounted on the end of the support piece (310); A connecting piece (311) is mounted on the side surface of the supporting piece (310), the connecting piece (311) is connected with the tab (2), and the connecting piece (311) is opposite to the supporting piece (311). 310) A bendable arrangement. 3. The battery assembly according to claim 2, wherein the connecting member (311) comprises: a first metal sheet layer (3110), the first metal sheet layer (3110) includes one or more first metal sheets, and a plurality of the first metal sheets are sequentially stacked and connected to each other; Wherein, the extending direction of the first metal sheet layer (3110) and the support member (310) is consistent. 4. The battery assembly of claim 1, wherein the battery assembly further comprises: A folding frame (4), the two ends of the folding frame (4) are respectively connected with the tabs (2) and the battery core body (1), and the folding frame (4) is foldably arranged so that the The tabs (2) are attached to the cell body (1), or the tabs (2) are opened in a direction away from the cell body (1). 5. The battery assembly according to claim 4, wherein the tab (2) comprises: A second metal sheet layer (20), the second metal sheet layer (20) includes one or more second metal sheets, a plurality of the second metal sheets are sequentially stacked and connected to each other, and the connection bracket ( 31) is connected to the second metal sheet layer (20). 6. The battery assembly according to any one of claims 1 to 5, wherein the battery assembly further comprises: a casing (5), the battery core body (1) is installed in the casing (5), and the casing (5) is provided with an installation opening; An explosion-proof component (6) is installed at the installation opening. 7. The battery assembly according to claim 6, wherein the casing (5) comprises: A top plate (50), the installation opening is provided on the top plate (50), and the explosion-proof component (6) is connected to the top plate (50). 8. The battery assembly according to claim 6, wherein the explosion-proof component (6) comprises an explosion-proof plate, and an explosion-proof groove is provided on the explosion-proof plate. 9. The battery assembly of claim 6, wherein the height of the housing (5) is 60mm to 200mm; and or, The length of the housing (5) is 100mm to 1500mm, and/or, The thickness of the casing (5) is 10mm to 50mm. 10. The battery assembly of claim 6, wherein the battery assembly further comprises: An insulating layer is provided between the tab (2) and the housing (5), and two oppositely arranged end faces of the insulating layer are respectively connected to the tab (2) and the housing (5). )fit.

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