CN109906521B

CN109906521B - Battery pack

Info

Publication number: CN109906521B
Application number: CN201780067270.6A
Authority: CN
Inventors: 李恩仲; 柳大馨
Original assignee: Samsung SDI Co Ltd
Current assignee: Samsung SDI Co Ltd
Priority date: 2016-11-03
Filing date: 2017-09-14
Publication date: 2022-12-16
Anticipated expiration: 2037-09-14
Also published as: KR20180049696A; KR102617690B1; CN109906521A; WO2018084424A1

Abstract

Various embodiments of the present invention relate to a battery pack, and a technical problem to be solved is to provide a battery pack that does not generate noise when twisted. To this end, the present invention provides a battery pack including: a housing; a battery unit mounted in the case; and a label attached to the case and the battery cell, wherein the case further includes a protrusion, and the label is attached to the protrusion.

Description

Battery pack

Technical Field

Various embodiments of the present invention relate to a battery pack.

Background

Generally, an electronic device such as a notebook computer, a pocket notebook computer, a network book, a mobile computer, an Ultra Mobile Personal Computer (UMPC), a Portable Multimedia Player (PMP), or an ultra thin PC has a battery pack having a plurality of battery cells connected in parallel/series as a portable power source. The battery pack includes a Protection Circuit Module (PCM) for protecting the battery cell from overcharge, overdischarge, or overcurrent, and the battery cell and the PCM are received in a case.

The above information disclosed in this background section is only for enhancement of understanding of the background of the described technology and therefore it may contain information that does not constitute prior art that is known in this country to a person of ordinary skill in the art.

Disclosure of Invention

Technical problem

Various embodiments of the present invention provide a battery pack that does not generate noise when twisted.

Technical scheme

In accordance with one aspect of the present invention, the above and other objects can be accomplished by the provision of a battery pack comprising: a housing; a battery unit mounted in the case; and a label attached to the case and the battery cell, wherein the case further includes a protrusion, and the label is attached to the protrusion.

The housing may include: a first surface with which the battery cell is in contact; a second surface opposite the first surface; and a third surface connecting the first surface and the second surface, wherein the protrusion is formed on the third surface.

The surface area of the protrusions may be smaller than the surface area of the third surface.

The protrusion may be formed at a partial region of the third surface.

The protrusion may be formed in a length direction of the third surface.

Alternatively, the protrusion may be formed in a width direction of the third surface.

The groove may be formed at one side or both sides of the protrusion.

The third surface and the convex surface are coplanar.

A label may be attached to the protrusion and the second surface.

The label may further include an extension extending toward the protrusion and the second surface.

Technical effects

As described above, various embodiments of the present invention provide a battery pack that does not generate noise when twisted. That is, various embodiments of the present invention provide a battery pack: which can minimize noise generated at an adhesive region even when a battery is distorted by minimizing an adhesive area between a case and a label.

Drawings

Fig. 1a and 1b are a sectional view and a perspective view of a battery pack according to various embodiments of the present invention.

Fig. 2a and 2b are partially enlarged perspective

views illustrating parts

2a and 2b illustrated in fig. 1b, and fig. 2c is a partially sectional

view illustrating parts

2a and 2b illustrated in fig. 1 b.

Fig. 3a and 3b are partial sectional views of battery packs according to various embodiments of the present invention.

Fig. 4a to 4c are partial perspective views of a battery pack according to various embodiments of the present invention.

PREFERRED EMBODIMENTS FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described in detail.

The various embodiments of the invention may be embodied in many different forms and should not be construed as limited to the example embodiments set forth herein. Rather, these exemplary embodiments of the present disclosure are provided so that this disclosure will be thorough and complete, and will convey the inventive concepts of the disclosure to those skilled in the art.

In the drawings, the size or thickness of various components may be exaggerated for clarity and conciseness. Like numbers refer to like elements throughout. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. Further, it will be understood that when element a is referred to as being "connected to" element B, element a can be directly connected to element B, or intervening elements C may be present and elements a and B are not directly connected to one another.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" or "comprising," and/or variations thereof, when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, for example, a first member, a first element, a first region, a first layer, and/or a first portion discussed below could be termed a second member, a second element, a second region, a second layer, and/or a second portion without departing from the teachings of the present disclosure.

Spatially relative terms, such as "below," "lower," "below," "over," "upper," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the 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 "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below.

Fig. 1a and 1b are a sectional view and a perspective view of a battery pack 100 according to various embodiments of the present invention.

As shown in fig. 1a and 1b, the battery pack 100 includes a case 110, a battery cell 120, a Protection Circuit Module (PCM) 130, an upper label 140, and a lower label 150.

The case 110 may be shaped as a rectangular frame to receive the battery cell 120 and the PCM 130. The case 110 may include, for example, a substantially flat bottom 111 having a rectangular opening, and a side surface portion 112 bent and extending upward from the bottom 111, but is not limited thereto.

Here, the side surface part 112 may be shaped, for example, as a rectangular frame that substantially surrounds one of the battery cells 120, but is not limited thereto. Accordingly, the bottom surface of the battery cell 120 is mounted on the bottom 111 of the case 110, and four side surfaces of the battery cell 120 may be in contact with the four side surface portions 112.

The case 100 may be formed using, for example, polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), polystyrene (PS), or polyvinyl chloride (PVC), but is not limited thereto.

The battery cell 120 may be mounted on the bottom 111 of the case 110 and then surrounded by the four side surface parts 112. For example, two of the battery cells 120 may be mounted in the case 110 while facing each other. The battery cell 120 may include, for example, a cell tab 121 extending outward by a predetermined length, but is not limited thereto. That is, the unit tabs 121 extending from the respective battery cells 120 may be disposed to face each other.

The battery cell 120 may be, for example, a pouch-type battery, each including an electrode assembly and an electrolyte surrounded by a pouch-shaped case, but is not limited thereto. Of course, the battery cell 120 may be, for example, a prismatic battery each including an electrode assembly and an electrolyte received in a prismatic case (or prismatic can), but is not limited thereto.

The PCM 130 may be interposed between the two battery cells 120. In addition, the cell tabs 121 of the battery cells 120 may be electrically/mechanically connected to the PCM 130. The PCM 130 may protect the battery cell 120 from being overcharged and/or overdischarged by, for example, but not limited to, controlling a charging/discharging voltage and/or current of the battery cell 120. In addition, the charging/discharging socket 131 may be coupled to the PCM 130 and then extend outward, and may be electrically connected to an external device. Of course, the PCM 130 may be installed at substantially the center of the case 110.

The upper label 140 is attached to the side surface part 112 of the case 110 and the top surface of the battery cell 120. The upper label 140 may include a main body 141 having a generally rectangular or square shape and an extension 142 extending outwardly from the main body 141 by a predetermined length. An extension 142 (to be described further later) of the upper label 140 may be formed at a region corresponding to the protrusion 116 and/or the groove 117 formed on the side surface part 112 of the case 110. Accordingly, the body 141 of the upper label 140 is attached to the top surface of the battery cell 120, and the extension 142 of the upper label 140 is attached to a predetermined region such as, but not limited to, the protrusion 116 of the case 110 and the side surface part 112 adjacent to the protrusion 116. Of course, the extension 142 of the upper label 140 is not attached to the groove 117 adjacent the projection 116. That is, a gap is formed between the extension 142 and the bottom surface of the groove 117.

Here, since the two battery cells 120 are provided, the upper label 140 may also include two upper labels spaced apart from each other. In addition, a separate center label 160 may be attached to the PCM 130.

The lower label 150 is attached to the bottom 111 of the case 110 and the bottom surface of the battery cell 120, thereby protecting the bottom surface of the battery cell 120 from the external environment.

In this way, the battery pack 100 according to the embodiment of the present invention does not generate or minimize noise even when it is twisted or deformed. That is, with the recent trend toward slimness or miniaturization of the battery pack 100, the battery pack 100 is easily deformed or twisted by an external force. In this case, since the adhesive area between the upper label 140 and the case 110 is increased, a large amount of noise is generated. Specifically, a large amount of noise is generated at the adhesive region between the upper label 140 and the housing 110.

However, as in the embodiment of the present invention, by forming the protrusion 116 at the region of the side surface part 112 of the case 110 and forming the extension 142 only at the region of the upper label 140 corresponding to the protrusion 116, it is possible to attach the extension 142 to the protrusion 116, thereby minimizing the adhesive area between the case 110 and the upper label 140. Therefore, noise is not generated or generated even when the battery pack 100 is twisted.

Fig. 2a and 2b are partially enlarged perspective

views illustrating parts

2a and 2b illustrated in fig. 1b, and fig. 2c is a partially sectional

view illustrating parts

2a and 2b illustrated in fig. 1 b.

As shown in fig. 2a to 2c, the housing 110 includes: a bottom 111; a side surface portion 112 bent at substantially a right angle and extending from the bottom portion 111; and a protrusion 116 and/or a groove 117 formed on the side surface part 112.

Specifically, each of the bottom portion 111 and the side surface portion 112 may include a substantially flat first surface 113, a substantially flat second surface 114 opposite the first surface 113, and a substantially flat third surface 115 formed between the first surface 113 and the second surface 114. Here, the protrusion 116 and/or the groove 117 may be formed at a partial region of the third surface 115 of the side surface part 112. Specifically, the protrusion 116 is formed by removing a partial region of the third surface 115, and the groove 117 is naturally formed at one side of the protrusion 116.

Meanwhile, the bottom surface of the battery cell 120 is in contact with the first surface 113 of the bottom 111 of the case 110, and the side surface of the battery cell 120 is in contact with the first surface 113 of the side surface portion 112 of the case 110. Further, the main body 141 of the upper label 140 contacts the top surface of the battery cell 120, and the extension 142 of the upper label 140 contacts the protrusion 116 and the second surface 114 of the side surface part 112. In addition, the lower label 150 contacts the bottom surface of the battery cell 120 and the second surface 114 of the bottom 111.

In this way, the main body 141 of the upper label 140 is in contact with the top surface of the battery cell 120, and the extension 142 of the upper label 140 is in contact with both the protrusion 116 of the third surface 115 and the second surface 114 provided on the side surface part 112 of the case 110, thereby minimizing the adhesive area of the case 110 and the upper label 140. Therefore, the battery pack 100 according to the embodiment of the present invention does not generate or minimize noise even when it is distorted or deformed by an external force.

Fig. 3a and 3b are partial sectional views of a battery pack 100 according to various embodiments of the present invention.

As shown in fig. 3a, the side surface part 112 of the case 110 may include: a substantially flat first surface 113 in contact with a side surface of the battery cell 120; a generally planar second surface 114 opposite the first surface 113; a third surface 115 (see fig. 2c and 3 b) connecting the first surface 113 and the second surface 114; and a protrusion 116 and/or a groove 117 formed on the third surface 115. Here, for example, the protrusion 116 may be formed relatively close to the second surface 114, and the groove 117 may be formed relatively close to the first surface 113, but aspects of the present invention are not limited thereto.

The surface area of the protrusion 116 (the area of the label attached to the extension 142) may be smaller than the surface area of the third surface 115. Therefore, an area of the extension portion 142 directly attached to the protrusion 116 is smaller than an area of the extension portion 142 directly attached to the third surface 115. Further, the protrusion 116 and/or the groove 117 may not be formed on the entire area of the third surface 115, but may be formed on a partial area of the third surface 115 in the length direction.

Here, the extension 142 of the upper label 140 may be attached to the protrusion 116 of the case 10 and then bent at a substantially right angle to be attached to the second surface 114 of the case 110. These features can be applied in common to all embodiments of the invention.

In this manner, the main body 141 of the upper label 140 is attached to the top surface of the battery cell 120, and the extension 142 of the upper label 140 is attached to the protrusion 116 and the second surface 114 of the side surface part 112 of the case 110. Accordingly, the adhesive area between the case 110 and the upper label 140 may be minimized, thereby minimizing or not generating noise even when the battery pack 100 is distorted.

As shown in fig. 3b, the protrusion 216 and/or the groove 217 may be formed along the length direction of the third surface 115, and the groove 217 having a predetermined depth may be formed at the rear side of the protrusion 216. In particular, the protrusion 216 is provided by forming the groove 217 at a region between the third surface 115 and the first surface 113 and a region between the third surface 115 and the second surface 114 centering on the third surface 115. Thus, the third surface 115 and the protrusion 216 may be substantially coplanar. That is, the third surface 115 to which the extension portion 142 of the upper label 140 is not attached and the projection 216 to which the extension portion 142 of the upper label 140 is not attached may be coplanar. These features can be applied in common to all embodiments of the invention.

In this manner, the extension 142 of the upper label 140 is attached to the protrusion 216 formed generally in the center of the third surface 115, thereby reducing the adhesive area between the housing 110 and the upper label 140. Accordingly, it is possible to minimize or not generate noise even when the battery pack 100 is twisted.

Fig. 4a to 4c are partial perspective views of a battery pack 100 according to various embodiments of the present invention.

As shown in fig. 4a, the protrusion 316 and the groove 317 formed on the side surface part 112 of the case 110 may be formed in a width direction of the third surface 115 instead of a length direction. That is, according to an embodiment of the present invention, the plurality of protrusions 316 and the grooves 317 are elongated in the width direction of the third surface 115. Accordingly, the extension 142 of the upper label 140 is attached to the protrusion 316 elongated in the width direction of the third surface 115 of the side surface part 112 of the case 110, thereby minimizing the adhesive area between the upper label 140 and the case 110.

Further, as shown in fig. 4b, a protrusion 116 and a groove 117 adjacent to the second surface 114 of the side surface part 112 are formed in a length direction of the third surface 115, and a plurality of additional grooves 118 may also be formed on the protrusion 116. That is, a plurality of additional grooves 118 elongated in the width direction of the side surface portion 112 may also be formed on the protrusion 116. With the additional groove 118, it is possible to further reduce the adhesive area between the extension 142 of the upper label 140 and the protrusion 116 of the case 110, thereby further improving the noise suppression efficiency even when the battery pack 100 is twisted.

Further, as shown in fig. 4c, a protrusion 216 and a groove 217 formed substantially at the center between the first surface 113 and the second surface 114 of the side surface part 112 are formed in the length direction of the third surface 115, and a plurality of additional grooves 218 may also be formed on the protrusion 216. That is, a plurality of additional grooves 218 elongated in the width direction of the side surface portion 112 may also be formed on the projection 216. With the additional groove 218, it is possible to further reduce the adhesive area between the extension 142 of the upper label 140 and the protrusion 216 of the case 110, thereby further improving the noise suppression efficiency even when the battery pack 100 is twisted.

While embodiments of a battery pack for practicing the present invention have been described, these embodiments are presented for purposes of illustration and not of limitation. Those skilled in the art will readily appreciate that many modifications and changes may be made without departing from the spirit and scope of the present invention as defined in the appended claims, and that such modifications and changes are intended to be included within the scope and spirit of the present invention.

Claims

1. A battery pack, comprising:

a housing;

a battery unit mounted in the case; and

a label attached to the case and the battery cell,

wherein the housing includes: a first surface, the battery cell being in contact with the first surface; a second surface opposite the first surface; and a third surface connecting the first surface and the second surface, and

wherein the case further includes a groove disposed along a length direction of the third surface and a plurality of protrusions and a plurality of additional grooves alternately disposed on one side of the groove in the length direction of the third surface, and the label is attached to the plurality of protrusions of the case.

2. The battery of claim 1, wherein the plurality of protrusions have a surface area that is less than a surface area of the third surface.

3. The battery pack according to claim 1, wherein the plurality of protrusions are formed at a partial region of the third surface.

4. The battery pack according to claim 1, wherein the grooves are formed at both sides of the plurality of protrusions.

5. The battery pack of claim 1, wherein the third surface and the plurality of raised surfaces are coplanar.

6. The battery pack of claim 1 wherein the label is further attached to the second surface.

7. The battery pack of claim 1 wherein the label further comprises an extension extending toward the plurality of projections and the second surface.