CN218472056U

CN218472056U - Lithium battery pack and electronic equipment

Info

Publication number: CN218472056U
Application number: CN202220813760.4U
Authority: CN
Inventors: 江平; 陈喜皇; 刘仕臻; 吕品风; 黄振星; 武家超
Original assignee: Shenzhen Xinwangda Intelligent Technology Co ltd
Current assignee: Shenzhen Xinwangda Intelligent Technology Co ltd
Priority date: 2022-04-08
Filing date: 2022-04-08
Publication date: 2023-02-10
Anticipated expiration: 2032-04-08

Abstract

The utility model discloses a lithium battery pack and electronic equipment, wherein, lithium battery pack includes lithium cell and protection shield, the lithium cell includes the casing of platykurtic, the casing has two big faces opposite in orientation, the protection shield is the flexible line way board, flexible line way board and lithium cell electric connection, the side and the big face laminating setting of flexible line way board, the protection shield is the flexible line way board, flexible line way board and lithium cell electric connection, the flexible line way board has first side, first side is the side of flexible line way board maximum area, first side and big face laminating setting. The casing laminating of protection shield and lithium cell sets up, when guaranteeing that protection shield and lithium cell are compactly connected, the heat transfer that components and parts produced to the protection shield, the protection shield sets up with the big face laminating of lithium cell, and the casing absorbs the heat of protection shield to realize the quick heat dissipation of protection shield, avoided the local high temperature of protection shield, lead to the life of protection shield shorter.

Description

Lithium battery pack and electronic equipment

Technical Field

The utility model relates to a technical field of power especially relates to a lithium battery pack and electronic equipment.

Background

In some electronic devices, a lithium battery pack may be provided to supply power to the electronic device as a power source. The lithium battery pack includes a lithium battery and a protection board, and the protection board is usually mounted on a head of the lithium battery in order to reduce the size of the lithium battery pack as much as possible and facilitate the layout of the lithium battery pack in the electronic device. However, in this way of integrating the protection board at the head of the lithium battery, the heat generated by the components of the protection board, especially for the power device, concentrated at the head of the lithium battery is not easy to dissipate, and it is very easy to cause local high heat to cause the failure of the protection board, which seriously affects the reliability and the service life of the lithium battery component.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a lithium battery pack can prolong the life of protection shield.

The utility model discloses still provide an electronic equipment who has above-mentioned lithium cell subassembly.

According to the utility model discloses lithium battery pack, include:

a lithium battery comprising a flat housing having two oppositely facing large faces;

the protection shield, the protection shield is flexible line way board, flexible line way board with lithium cell electric connection, just flexible line way board has first side, first side and one the big face laminating sets up.

According to the utility model discloses lithium battery pack has following beneficial effect at least: through the big laminating setting with the casing of protection shield and lithium cell, when guaranteeing protection shield and lithium cell compact connection, the heat of protection shield can be absorbed to the casing high-efficiently to realize the quick heat dissipation of protection shield, avoided the local high temperature of protection shield, can prolong the life of protection shield.

According to some embodiments of the utility model, the protection shield have with the opposite second side of first side orientation, first side with the laminating of big face sets up, the second side is provided with the circuit, the second side be provided with the components and parts that the circuit electricity is connected.

According to some embodiments of the invention, the thickness of the protection plate is between 0.01mm and 0.13 mm.

According to some embodiments of the utility model, the protection shield have with the opposite second side of first side orientation, first side with the laminating of big face sets up, first side with the second side all is provided with the circuit, the second side be provided with the components and parts that the circuit electricity is connected.

According to some embodiments of the invention, the thickness of the protection plate is between 0.13mm and 0.18 mm.

According to some embodiments of the present invention, the lithium battery pack further comprises an adhesive layer, the adhesive layer being bonded between the large face and the side face of the protection plate.

According to some embodiments of the present invention, the attaching area of the protective plate accounts for more than 80% of the area of the large face.

According to the utility model discloses a some embodiments, the protection shield includes that first region and second are regional, first region is used for the integration to be connected with the components and parts electricity anodal circuit, the second region is used for the integration to be connected with the components and parts electricity the negative pole circuit.

According to some embodiments of the utility model, the protection shield includes body, first pin and second pin, first pin with the second pin all with the body is connected, the body with the setting of laminating greatly, first pin with the utmost point ear electric connection of lithium cell, the second pin be used for with outside power module electric connection.

According to the utility model discloses electronic equipment, including foretell lithium cell subassembly.

According to the utility model discloses electronic equipment has following beneficial effect at least: the electronic equipment adopts the lithium battery component, and the lithium battery component has a compact structure, so that the compact assembly of the electronic equipment is ensured; moreover, the protection board can realize quick heat dissipation through the shell, so that the service life of the protection board is ensured, and further the service life of the electronic equipment is ensured.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention will be further described with reference to the following drawings and examples, in which:

fig. 1 is a schematic view of an overall structure of a lithium battery module according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a protection plate of a lithium battery pack according to an embodiment of the present invention.

Reference numerals:

a lithium battery component 100, a lithium battery 110, a shell 111, an upper cover 112, a tab 113, a protective plate 120,

bodies

121, 1211 and a first side surface; 1212. a second side surface; a first lead 122, a second lead 123, and a component 124.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element 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 invention.

In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Conventionally, the lithium battery 110 includes a case 111, an upper cover 112, a winding core and tabs 113, wherein the winding core is assembled inside the case 111, the case 111 is hermetically connected with the upper cover 112, and the tabs 113 are assembled on the upper cover 112 and connected with the winding core; the case 111 is flat and has opposite large surfaces, i.e., outer surfaces in the thickness direction of the lithium battery 110.

According to the utility model discloses a lithium battery pack 100, refer to fig. 1 and fig. 2, including lithium cell 110 and protection shield 120, lithium cell 110 includes flat casing 111, and casing 111 has two opposite big faces of orientation, and protection shield 120 is the flexible line way board, flexible line way board and lithium cell 110 electric connection, the side and the big face laminating setting of flexible line way board. As shown in fig. 1 and fig. 2, a side surface of the flexible printed circuit board attached to the large surface is a first side surface 1211, a side surface opposite to the first side surface 1211 is a second side surface 1212, the first side surface 1211 and/or the second side surface 1212 are integrated with a circuit by using a copper foil, and the first side surface 1211 and the second side surface 1212 are two opposite side surfaces having the largest area among a plurality of side surfaces in the flexible printed circuit board.

Specifically, the protection board 120 is attached to the casing 111 of the lithium battery 110, when the protection board 120 is compactly connected to the lithium battery 110, heat generated by the component 124 is transferred to the protection board 120, the protection board 120 is attached to the large surface of the casing 111 of the lithium battery 110, and the casing 111 absorbs heat of the protection board 120, so that quick heat dissipation of the protection board 120 is realized, local over-high temperature of the protection board 120 is avoided, the overall temperature of the lithium battery is ensured to be uniform, and the service life of the protection board 120 can be prolonged.

Moreover, instead of the protection plate 120 being disposed at the head of the lithium battery 110, the protection plate 120 is attached to the side surface of the case 111 of the lithium battery 110, and the top cover of the lithium battery 110 does not need to be provided with a groove for accommodating the protection plate 120, so that more space can be reserved in the case 111 for accommodating the winding core and the electrolyte, thereby increasing the capacity of the lithium battery 110.

In addition, the area of the large surface of the casing 111 is larger than the size of the top cover of the lithium battery 110, so that compared with the protection plate 120 in the prior art, the design size of the protection plate 120 in the present application is larger, and the heat dissipation effect of the protection plate 120 is better; and because the side surface area of the protection plate 120 is large, the integrated circuits on the side surface of the protection plate 120 are sparse, thereby avoiding the problems of short circuit and the like of the circuits.

In some embodiments, the range of the protection plate 120 is between 0.01mm and 0.18mm, wherein the thickness of the protection plate 120 is at least 0.01mm, so that the thickness of the protection plate 120 is large enough, the difficulty of manufacturing the protection plate 120 and the difficulty of integrating the circuit are both reduced, and the manufacturing of the protection plate 120 is more convenient. The thickness of the protective plate 120 is at least less than or equal to 0.18mm, so that the thickness of the protective plate 120 is sufficiently small, the protective plate 120 has a good heat dissipation effect, and the overall thickness of the lithium battery 110 is thin.

In some embodiments, the protection plate 120 has a first side 1211 and a second side 1212 facing opposite directions, the first side 1211 is attached to a large surface of the housing 111, the second side 1212 is provided with a copper foil, the second side 1212 is integrated with a circuit by using the copper foil, and the second side 1212 is provided with the component 124 electrically connected to the circuit. As can be seen from the above, the component 124 and the circuit are located on the side of the protection plate 120 away from the lithium battery 110, which not only ensures that the protection plate 120 is tightly attached to the large surface of the casing 111, but also ensures that the circuit and the component 124 are located in a low temperature environment, and the circuit and the component 124 are protected.

Further, only one side is provided with the circuit to the protection board, and the thickness of protection board 120 is between 0.01mm and 0.13mm, and wherein, the thickness of protection board 120 is at least at 0.01mm, so, the thickness of protection board 120 is enough big, and the preparation degree of difficulty of protection board 120 and the integrated degree of difficulty of circuit all can reduce, and the preparation of protection board 120 is more convenient. The thickness of the protective plate 120 is at least less than or equal to 0.13mm, so that the thickness of the protective plate 120 is sufficiently small, the protective plate 120 has a good heat dissipation effect, and the overall thickness of the lithium battery 110 is thin.

In some embodiments, the protection plate 120 has a first side 1211 and a second side 1212 facing opposite directions, the first side 1211 is attached to a large surface of the housing 111, copper foils are disposed on both the first side 1211 and the second side 1212, circuits are disposed on both the first side 1211 and the second side 1212, and the components 124 electrically connected to the circuits are disposed on the second side 1212. Therefore, the protective plate 120 is tightly attached to the large surface of the shell 111, and the arrangement of the lines is sparse, so that short circuit of the lines is avoided.

It should be noted that, when the electronic device is used, the current requirement of the circuit is high, and at this time, the circuit on one side of the protection plate 120 cannot meet the requirement, and the circuit needs to be disposed on both sides of the protection plate 120, so that the use requirement of the electronic device can be met.

Further, to being provided with the circuit to the protection shield both sides, the thickness of protection shield 120 is between 0.13mm and 0.18mm, and wherein, the thickness of protection shield 120 is at least at 0.13mm, and like this, the thickness of protection shield 120 is enough big, and the preparation degree of difficulty of protection shield 120 and the integrated degree of difficulty of circuit all can reduce, and the preparation of protection shield 120 is more convenient. The thickness of the protective plate 120 is at least less than or equal to 0.18mm, so that the protective plate 120 has a small thickness, the protective plate 120 has a good heat dissipation effect, and the overall thickness of the lithium battery 110 is ensured to be thin.

In some embodiments, the protection board 120 may have a single-layer structure or a stacked multi-layer structure, for example, a two-layer board structure is adopted, so that the width of the copper foil integrated in the protection board 120 can be increased, that is, the copper foil used for forming a circuit is wider, thereby increasing the current passing, satisfying the power input and output requirements of the lithium battery module, and having a better heat dissipation effect.

In some embodiments, the components 124 are packaged in a sheet (e.g., CSP type) to further reduce the overall thickness of the lithium battery 110.

In some embodiments, the lithium battery pack 100 further includes an adhesive layer made of a material having high temperature resistance and good heat conduction effect, one side of the adhesive layer is adhesively connected to the large surface of the case 111, and the other side of the adhesive layer is adhesively connected to the side surface of the protective plate 120. Therefore, the bonding layer can ensure that the protection plate 120 is tightly attached to the side surface of the casing 111, so that the casing 111 has a good heat conduction effect on the protection plate 120, and the protection plate 120 has a good heat dissipation effect.

In some embodiments, the protection board 120 includes a first region and a second region, the first region is used for integrating a positive electrode circuit electrically connected to the component 124, and the second region is used for integrating a negative electrode circuit electrically connected to the component 124, so that the positive electrode circuit and the negative electrode circuit are relatively distributed, thereby avoiding the problem of breaking the circuit board.

In some embodiments, the attaching area of the protection plate 120 should not be less than nine-tenth of the area of one side of the casing 111, so that the attaching area between the protection plate 120 and the casing 111 is large enough to ensure that the heat of the protection plate 120 can be rapidly transferred to the casing 111, and further, the casing 111 can rapidly dissipate the heat of the protection plate 120, so that the service life of the protection plate 120 can be prolonged; in addition, the integrated circuits on the protection board 120 are sparse, so as to avoid the problem of short circuit of the circuits.

In some embodiments, the protection plate 120 includes a body 121, a first pin 122 and a second pin 123, the first pin 122 is located at one end of the body 121 close to the tab 113 and electrically connected to the body 121, and one end of the first pin 122 away from the body 121 is electrically connected to the tab 113; the second pin 123 is located at the other end of the body 121 and electrically connected to the body 121, and one end of the second pin 123 away from the body 121 is electrically connected to an external power utilization module; the size of the side surface of the body 121 is substantially equal to the large surface of the case 111, one side of the body 121 is bonded to one side of the adhesive layer, and the other side of the adhesive layer is bonded to the large surface of the case 111, so that the side surface of the body 121 is attached to the large surface of the case 111.

According to the utility model discloses a second aspect embodiment discloses an electronic equipment, includes foretell lithium cell component 100.

Specifically, the lithium battery pack 100 is adopted by the electronic device, and the lithium battery pack 100 has a compact structure, so that the compact assembly of the electronic device is ensured; moreover, the protection board 120 can dissipate heat quickly through the housing 111, so that the service life of the protection board 120 is ensured, and the service life of the electronic device is further ensured.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Claims

1. A lithium battery cell pack, comprising:

a lithium battery comprising a housing having two oppositely facing large faces;

the protection shield, the protection shield is the flexible line way board, the flexible line way board with lithium cell electric connection, just the flexible line way board has first side, first side and one the laminating of big face sets up.

2. The lithium battery pack as claimed in claim 1, wherein the protective plate has a second side surface facing opposite to the first side surface, the first side surface being disposed to be attached to the large surface, the second side surface being provided with a wiring, and the second side surface being provided with a component electrically connected to the wiring.

3. The lithium battery cell pack of claim 2, wherein the protective plate has a thickness between 0.01mm and 0.13 mm.

4. The lithium battery pack as claimed in claim 1, wherein the protective plate has a second side surface facing opposite to the first side surface, the first side surface is attached to the large surface, the first side surface and the second side surface are provided with circuits, and the second side surface is provided with components electrically connected to the circuits.

5. The lithium battery cell pack of claim 4, wherein the protective plate has a thickness between 0.13mm and 0.18 mm.

6. The lithium battery cell pack as claimed in claim 1, further comprising an adhesive layer adhered between the large face and the side face of the protective plate.

7. The lithium battery cell pack as claimed in claim 1, wherein the attachment area of the protective sheet occupies 80% or more of the area of the large face.

8. The lithium battery cell pack as claimed in claim 1, wherein the protective plate includes a first region for integrating a positive electrode wiring electrically connected to the component and a second region for integrating a negative electrode wiring electrically connected to the component.

9. The lithium battery pack as claimed in claim 1, wherein the protection plate comprises a body, a first lead and a second lead, the first lead and the second lead are both connected with the body, the body is attached to the large surface, the first lead is electrically connected with a tab of the lithium battery, and the second lead is electrically connected with an external power utilization module.

10. An electronic device characterized by comprising the lithium battery pack according to any one of claims 1 to 9.