CN212625966U

CN212625966U - Composite battery and electronic device

Info

Publication number: CN212625966U
Application number: CN202021623584.5U
Authority: CN
Inventors: 高锃; 徐亮亮; 魏学文
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2021-02-26
Anticipated expiration: 2030-08-06

Abstract

The present disclosure relates to a composite battery and an electronic device. The composite battery includes: each battery cell comprises a positive electrode lug and a negative electrode lug; the conducting strip is respectively connected with the positive electrode tab of any one of the two different battery cells and the negative electrode tab of the other battery cell, so that the battery cells are sequentially connected in series; and the battery protection plate is connected with the positive electrode lugs and the negative electrode lugs at two ends of the series circuit respectively after being connected in series with the plurality of battery cells.

Description

Composite battery and electronic device

Technical Field

The present disclosure relates to the field of terminal technologies, and in particular, to a composite battery and an electronic device.

Background

At present, with the continuous and powerful functions configured in the electronic device, the power consumption of the electronic device is also continuously increased, and thus a higher requirement is put forward on the capacity of the battery in the electronic device.

Based on this, in order to improve the cruising ability of the electronic equipment, designers propose a scheme of placing a plurality of batteries in the electronic equipment, and the plurality of batteries are connected in parallel or in series to supply power to the electronic equipment.

SUMMERY OF THE UTILITY MODEL

The present disclosure provides a composite battery and an electronic device to solve the disadvantages of the related art.

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

each battery cell comprises a positive electrode lug and a negative electrode lug;

the conducting strip is respectively connected with the positive electrode tab of any one of the two different battery cells and the negative electrode tab of the other battery cell, so that the battery cells are sequentially connected in series;

and the battery protection plate is connected with the positive electrode lugs and the negative electrode lugs at two ends of the series circuit respectively after being connected in series with the plurality of battery cells.

Optionally, the plurality of battery cells are arranged side by side, the conducting strip is connected with the positive electrode tab of any one of the two adjacent battery cells and the negative electrode tab of another battery cell, and the battery protection board is connected with the positive electrode tab of any one of the two battery cells and the negative electrode tab of another battery cell in the two battery cells in the side by side directions.

Optionally, the composite battery further includes voltage detection lines, one end of each voltage detection line is connected to any one of the conductive sheets, and the other end of each voltage detection line is connected to the battery protection board, and the voltage detection lines are used for detecting voltages of the positive electrode tab and the negative electrode tab connected to any one of the conductive sheets.

Optionally, the voltage detection line is welded to the battery protection plate.

Optionally, the conductive tabs are welded to the corresponding positive tabs and negative tabs.

Optionally, the length of at least one of the plurality of battery cells is different from the lengths of the other battery cells.

Optionally, the conductive sheet includes one of a nickel sheet, a copper sheet, a nickel alloy sheet, and a copper alloy sheet.

Optionally, the composite battery further includes an encapsulation shell, and the plurality of battery cells are encapsulated in the same encapsulation shell.

Optionally, the package casing includes an aluminum plastic film package casing.

According to a second aspect of embodiments of the present disclosure, there is provided an electronic device including the composite battery according to any one of the embodiments described above.

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

according to the embodiment, the two different batteries are connected in series through the connection of the conducting strips independent of the battery protection board and the positive electrode lug and the negative electrode lug, so that copper sheets in the battery protection board are avoided, current flowing through the interior of the composite battery does not need to pass through the battery protection board, and the temperature rise of the battery protection board is reduced; in addition, the positive electrode lug and the negative electrode lug which are connected through the conducting strips are not connected to the battery protection plate, so that the occupation of a layout area on the battery protection plate can be reduced, and the layout of other components is facilitated.

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 a schematic structural view of a composite battery in the related art.

Fig. 2 is a schematic diagram illustrating a structure of a composite battery according to an exemplary embodiment.

Fig. 3 is a schematic structural view illustrating another hybrid battery according to an exemplary embodiment.

Fig. 4 is a schematic structural view illustrating still another hybrid battery according to an exemplary embodiment.

FIG. 5 is a schematic cross-sectional view of an electronic device shown in accordance with an example 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 apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

Fig. 1 is a schematic structural view of a composite battery 100 in the related art. As shown in fig. 1, the composite battery 100 may include a battery cell 101, a battery cell 102, and a protective plate 103. The positive tab and the negative tab of the battery cell 101 are respectively connected to the protection plate 103, and the positive tab and the negative tab of the battery cell 102 are also respectively connected to the protection plate 103, and the negative tab of the battery cell 101 and the positive tab of the battery cell 102 can be connected in series through the copper sheet arranged in the protection plate 103, so that the series connection between the battery cell 101 and the battery cell 102 is realized. In this correlation technique, because the positive tab and the negative tab of each electric core that composite battery 100 includes all need connect respectively on protection shield 103, improved the requirement to welding area on protection shield 103, be unfavorable for arranging of other components and parts on protection shield 103, connect adjacent two electric cores through the copper sheet in protection shield 103 in series moreover, lead to series current to inevitable need pass through protection shield 103, lead to the increase in temperature of protection shield 103.

Based on the above problems, the present disclosure provides a composite electrical core 200 to solve the technical problems in the related art. As shown in fig. 2, the composite battery cell 200 may include a plurality of battery cells, which will be described below by taking as an example that the plurality of battery cells include a first battery cell 1 and a second battery cell 2, where the first battery cell 1 includes a first positive tab 11 and a first negative tab 12, and the second battery cell 2 includes a first positive tab 21 and a second negative tab 22. As shown in fig. 2, the composite battery 200 may further include a conductive sheet 3 and a battery protection 4, where the conductive sheet 3 is connected to the positive tab and the negative tab of any one of the two different battery cells, respectively, and connects the battery cells in series. For example, in the embodiment of fig. 2, the conductive sheet 3 is connected to the negative electrode tab 12 of the first battery cell 1 and the positive electrode tab of the second battery cell 2, so that the first battery cell 1 and the second battery cell 2 can be connected in series. Of course, when the composite battery 200 includes three or more cells, the negative electrode tab 22 of the second cell 2 may be connected to the same conductive sheet 3 with the positive electrode tabs of other cells, so as to realize series connection between three or more cells. This battery protection board 4 can be connected with the positive pole ear and the negative pole ear at the series circuit both ends after this polylith electricity core establishes ties, and the party in the head end of the series circuit who constitutes by polylith electricity core and end can regard as anodal link with positive pole ear, the other party can regard as the negative pole link with the negative pole ear promptly, and anodal link and negative pole link all can be connected to battery protection board 4 to form a closed loop. In the embodiment shown in fig. 2, the positive tab of the first battery cell 1 is used as the positive connection end of the series circuit formed by connecting the first battery cell 1 and the second battery cell 2 in series, the negative tab of the second battery cell 2 is used as the negative connection end of the series circuit formed by connecting the first battery cell 1 and the second battery cell 2 in series, and the positive tab of the first battery cell 1 and the negative tab of the second battery cell 2 are connected to the battery protection board.

As can be seen from the above embodiments, in the present disclosure, the conductive sheet 3 independent of the battery protection plate 4 is connected to the positive tab and the negative tab to connect two different batteries in series, so as to avoid using a copper sheet in the battery protection plate 4, and thus, the current flowing through the interior of the composite battery 200 does not need to pass through the battery protection plate 4, which is beneficial to reducing the temperature rise of the battery protection plate 4; moreover, the positive tab and the negative tab connected through the conductive sheet 3 are not connected to the battery protection plate 4, so that the occupation of the layout area on the battery protection plate 4 can be reduced, and the layout of other components is facilitated. The conductive plate 3 may be made of a metal material with excellent welding performance and conductivity, for example, the conductive plate 3 may include one of a nickel plate, a copper plate, a nickel alloy plate, and a copper alloy plate, the conductive plate 3 may be welded and fixed to the positive tab and the negative tab connected to the conductive plate 3, and similarly, the battery protection plate 4 may also be welded and fixed to the corresponding positive tab or the corresponding negative tab.

In an embodiment, still using fig. 2 to show, the multiple battery cells included in the composite battery 200 may be arranged side by side, and the conductive sheet 3 connects the positive electrode tab of any one of the two adjacent battery cells and the negative electrode tab of another battery cell, and the battery protection plate 4 is connected to the positive electrode tab of any one of the two battery cells and the negative electrode tab of another battery cell located on two sides in the side by side direction, so as to realize series connection between the multiple battery cells, and meanwhile, the current between the adjacent battery cells does not need to be conducted through the battery protection plate 4. In another embodiment, the plurality of battery cells may also be adaptively designed according to the shape of a battery compartment of an electronic device configuring the composite battery 200, so as to improve flexibility of matching between the composite battery 200 and the electronic device.

As shown in fig. 2, in an embodiment in which a plurality of battery cells are arranged side by side, the lengths of the plurality of battery cells may be the same, or, in another embodiment, as shown in fig. 3, the length of at least one battery cell in the plurality of battery cells may be different from the lengths of other battery cells, so as to enhance the adaptability of the composite battery 200 to the internal space of the electronic device. Further, in the embodiment of fig. 2 and 3, the length of at least one of the battery cells is greater than or equal to twice the width of the battery cell, that is, at least one of the battery cells takes the shape of a narrow strip, so that the internal resistance of the composite battery 100 can be reduced.

In the above embodiments, in order to know the usage of each battery cell in time, the voltage of each battery cell needs to be acquired. Therefore, as shown in fig. 4, the composite battery 200 may further include voltage detection lines 5, one end of each voltage detection line 5 is connected to the conductive sheet 3, and the other end is connected to the battery protection plate 4, so that the power management chip may obtain voltages of the positive tab and the negative tab conducted with the voltage detection line 5 through the voltage detection line 5, and may further obtain voltages of the positive tab and the negative tab connected with the battery protection plate 4, so that the electric core of each electric core may be calculated, so as to facilitate adjustment of the charging strategy and the discharging strategy of the composite electric core 200.

For example, in the embodiment of fig. 4, the voltage detection line 5 switches on the negative electrode tab 12 of the first cell 1 and the positive electrode tab 21 of the second cell 2, and in an ideal situation, the voltage at the negative electrode tab 12 of the first cell 1 is equal to the voltage at the positive electrode tab 21 of the second cell 2, so that the voltage at the negative electrode tab 12 of the first cell 1 and the voltage at the positive electrode tab 21 of the second cell 2 can be obtained through the voltage detection line, and based on the voltage detected at the positive electrode tab of the first cell 1 and the voltage detected at the negative electrode tab of the second cell 2, the voltage of each cell can be obtained according to the distance that the voltage of the series circuit is equal to the sum of the voltages at each place.

Wherein, because it is connected to battery protection shield 4 through voltage detection line 5 to only need reserve a pad position for two utmost point ears on battery protection shield 4, so for the technical scheme among the relevant art, still can reduce the area of welding region on battery protection shield 4

In each of the above embodiments, as shown in fig. 4, the composite battery 200 may further include an encapsulating shell 6, and a plurality of battery cells are all encapsulated in the same encapsulating shell 6, that is, the first battery cell 1 and the second battery cell 2 shown in fig. 4 are all encapsulated in the same encapsulating shell 6, so that, compared to a scheme in which each battery cell 1 corresponds to one encapsulating shell, the width of the composite battery 200 between adjacent battery cells is not increased due to the thickness of the encapsulating shell 6, which is beneficial to increasing the energy density of the low composite battery 200. Wherein the package 6 may comprise an aluminum plastic film package. Moreover, the packaging shell 6 and the transition position of at least one group of adjacently arranged battery cells in the plurality of battery cells arranged side by side can be processed into arc-shaped arrangement so as to adapt to the application scenes of the electronic devices such as virtual reality eyes and wearable devices. In other examples, when the plurality of battery cells include three or more battery cells, the three or more battery cells may also be packaged in the same package 6.

Based on the embodiments provided in the present disclosure, the present disclosure also protects an electronic device 300 as shown in fig. 5, where the electronic device 300 may include the composite battery 200 described in any of the embodiments, and the composite battery 200 may be used to supply power for normal operation of the electronic device 300. The electronic device 300 may include a mobile phone terminal, a tablet terminal, an electronic reader, a wearable device, and the like.

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

1. A composite battery, comprising:

2. The composite battery of claim 1, wherein the plurality of cells are arranged side by side, the conductive sheet is connected to a positive tab of any one of two adjacent cells and a negative tab of the other cell, and the battery protection plate is connected to the positive tab of any one of the two cells and the negative tab of the other cell in the two sides in the side-by-side direction.

3. The composite battery according to claim 1, further comprising voltage detection lines, each of which has one end connected to any one of the conductive sheets and the other end connected to the battery protection plate, for detecting voltages of the positive tab and the negative tab connected to the any one of the conductive sheets.

4. The composite battery according to claim 3, wherein the voltage detection line is welded to the battery protection plate.

5. The composite battery of claim 1, wherein the conductive tabs are welded to corresponding positive and negative tabs.

6. The composite battery of claim 1, wherein at least one cell of the plurality of cells has a length that is different from lengths of other cells.

7. The composite battery of claim 1, wherein the conductive sheet comprises one of a nickel sheet, a copper sheet, a nickel alloy sheet, a copper alloy sheet.

8. The composite battery of claim 1, further comprising an encapsulation shell, wherein the plurality of cells are encapsulated in the same encapsulation shell.

9. The composite battery of claim 8, wherein the enclosure comprises an aluminum plastic film enclosure.

10. An electronic device comprising the composite battery according to any one of claims 1 to 9.