CN217823177U - Battery and electronic device - Google Patents

Abstract

The application discloses a battery and an electronic device. The battery comprises a packaging bag, at least two winding cores, a first circuit board, a second circuit board and an adapter; the at least two winding cores are connected in series and stacked in the packaging bag along a first direction, the tabs connected with the at least two winding cores are respectively arranged at a first end and a second end of the battery, and the first end and the second end are oppositely arranged along a second direction; the lug at the first end is electrically connected with the first circuit board, the lug at the second end is electrically connected with the second circuit board, and the adapter piece is used for electrically connecting the first circuit board with the second circuit board. The battery can improve the energy density of the battery, and is beneficial to the miniaturization design of the battery and the electronic equipment.

Description

Battery and electronic equipment

Technical Field

The application relates to the field of batteries, in particular to a battery and electronic equipment.

Background

With the development of electronic technology, the demand of electronic devices for charging and discharging power of batteries is increasing, and one of the main ways to increase the charging and discharging power in the prior art is to connect a plurality of batteries and charge and discharge the batteries. However, the larger the number of batteries is, the larger the space occupied by the packaging structure of the batteries is, which not only results in the larger volume of the electronic device and is difficult to satisfy the miniaturization design, but also the packaging structure can not be charged and discharged, which has a negative effect on increasing the energy density of the batteries.

SUMMERY OF THE UTILITY MODEL

The application provides a battery and an electronic device, which are used for improving the energy density of the battery and are beneficial to the miniaturization design of the battery and the electronic device.

In a first aspect, the present application provides a battery including a pouch, at least two jelly rolls, a first circuit board, a second circuit board, and an adaptor. The at least two winding cores are connected in series and stacked in the packaging bag along the first direction, the tabs connected with the at least two winding cores are respectively arranged at the first end and the second end of the battery, the first end and the second end are oppositely arranged along the second direction, and optionally, the second direction is perpendicular to the first direction. The pole ear at the first end is electrically connected with the first circuit board, the pole ear at the second end is electrically connected with the second circuit board, and the adapter piece electrically connects the first circuit board with the second circuit board.

The single battery comprises a plurality of winding cores, the capacity of the single battery is high, the energy density of the battery is high under the same volume, in other words, the volume of the battery is small under the same energy density, and the miniaturization design of the battery and the electronic equipment with the battery is facilitated; and moreover, the plurality of winding cores are stacked, so that the space occupied by the plurality of winding cores can be controlled in a small range, and the reduction of the volume of the battery is facilitated.

Alternatively, a single winding core connects two tabs, and both tabs are disposed at the same end of the winding core, so that the two tabs can be connected to the same circuit board (first circuit board or second circuit board), and the impedance between the two tabs is smaller.

Optionally, a single roll core is connected with two tabs, and the two tabs are respectively arranged at the first end and the second end, so that the tab stacking problem can be improved, and the packaging difficulty is reduced.

Optionally, at least two winding cores include a first winding core and a second winding core, two tabs connected by the first winding core are arranged at the same end of the battery, and two tabs connected by the second winding core are arranged at the first end and the second end respectively.

Optionally, the plate body of the second circuit board is perpendicular to the first direction, the second circuit board can be controlled not to protrude out of the packaging bag along the first direction, and the thickness of the battery is small.

Optionally, the plate body of the second circuit board is parallel to the first direction, the thickness of the second circuit board is smaller, and the occupied space in the length direction of the battery is smaller, so that the length of the battery is favorably reduced.

Optionally, the tab at the second end is bent towards the first direction, which is beneficial to reducing the length of the battery.

Optionally, the second circuit board is arranged on one side, facing the winding core, of the tab of the second end, and the second circuit board is clamped between the packaging bag and the tab along a second direction, so that the second circuit board and the electronic components on the second circuit board can reduce contact with equipment (such as a battery compartment) for accommodating a battery, and the second circuit board and the electronic components on the second circuit board can be protected; or the second circuit board is arranged on one side of the lug of the second end, which is back to the winding core, so that the second circuit board with larger width can be assembled, and the second circuit board is positioned on the outer side, thereby being beneficial to the electrical connection of the second circuit board and other external equipment.

Optionally, the interposer includes at least one of a flexible circuit board, a printed circuit board, an electronic wire (e.g., cable wire), a metal sheet.

In a second aspect, the present application provides an electronic device, including a load and any one of the above batteries, wherein the battery is electrically connected to the load to supply power to the load, and the electronic device also has the beneficial effects that the battery can produce.

Drawings

Fig. 1 is a schematic structural view of a battery according to a first embodiment of the present application;

FIG. 2 is a schematic view of a first end of the battery shown in FIG. 1;

FIG. 3 is a schematic view of the second end of the cell shown in FIG. 1;

fig. 4 is a schematic view illustrating an assembly of a first second circuit board and a roll core according to an embodiment of the present application;

fig. 5 is a schematic diagram of a second circuit board and a winding core assembly according to an embodiment of the present application;

fig. 6 is a schematic view illustrating an assembly of a third second circuit board and a roll core according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a battery according to a second embodiment of the present application;

FIG. 8 is a schematic view of the first end of the battery shown in FIG. 7;

FIG. 9 is a schematic view of the second end of the cell shown in FIG. 7;

fig. 10 is a schematic structural view of another battery according to a second embodiment of the present application;

FIG. 11 is a schematic view of the first end of the battery shown in FIG. 10;

FIG. 12 is a schematic view of the second end of the cell shown in FIG. 10;

fig. 13 is a schematic structural view of a battery according to a third embodiment of the present application;

FIG. 14 is a schematic view of the first end of the battery shown in FIG. 13;

fig. 15 is a schematic view of the structure of the second end of the battery shown in fig. 13.

Detailed Description

The battery provided by the embodiment of the application comprises at least two winding cores which are arranged in a packaging bag and connected in series, the capacity of a single battery is higher, the energy density of the battery is higher under the same volume, in other words, the volume of the battery is smaller under the same energy density; moreover, the winding cores are stacked, so that the space occupied by the winding cores can be controlled in a small range, and the volume of the battery can be reduced.

The pole lugs connected with the winding cores and respectively arranged at the two ends of the battery are electrically connected through the adapter, and the adapter can pass bidirectional current for the battery with the charging and discharging functions.

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described below in detail with reference to specific embodiments and accompanying drawings. It should be apparent that the embodiments described below are only some embodiments of the present application, and not all embodiments. In the following embodiments and technical features thereof, all of which are described below may be combined with each other without conflict, and also belong to the technical solutions of the present application.

It should be understood that in the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only used for convenience of describing technical solutions and simplifying the description of the respective embodiments of the present application, but do not indicate or imply that a device or an element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

Example 1

Referring to fig. 1 to 3, a battery 1 includes a package bag 10, at least two winding cores 20, a first circuit board 31, a second circuit board 32, an adaptor 33, and a plurality of tabs.

A single jelly roll 20 may be coupled with two tabs so that charging and discharging may be performed through the two tabs. The body of the single winding core 20 may include a first separator, a negative electrode tab, a second separator, and a positive electrode tab, which are sequentially wound in a stacked manner, the two tabs are a first tab 21 and a second tab 22, respectively, one of the first tab 21 and the second tab 22 is a negative electrode tab, and the other is a positive electrode tab. For convenience of description, the first tab 21 is taken as a negative electrode tab, and the second tab 22 is taken as a positive electrode tab. The first tab 2 is electrically connected to the negative pole piece of the winding core 20, and the second tab 22 is electrically connected to the positive pole piece of the winding core 20. The first tab 21 and the second tab 22 may have the same or different structures.

The number of winding cores 20 included in the battery 1 may be determined according to actual requirements, and the winding cores 20 may be the same or partially the same or completely different, and the embodiment of the present application is not limited. The application is described below with the stacking of the same cores 20 as an example. These winding cores 20 are connected in series, where the capacity of the battery 1 is equal to or almost equal to the sum of the capacities of the plurality of winding cores 20, the capacity of a single battery 1 is high, and the energy density of the battery 1 is high at the same volume, in other words, the volume of the battery 1 is small at the same energy density, which is advantageous for the miniaturization design of the battery 1 and the electronic device having the battery 1.

These winding cores 20 are stacked in the packaging bag 10, for example, in the first direction x indicated by the arrow in the figure, so that the occupied space is small, and the volume of the battery 1 is also reduced. Further, the winding cores 20 can be closely attached to each other, and the shape and position are not easily changed.

The first direction x may be considered as a thickness direction of the battery 1 and the single winding core 20, a length direction of the battery 1 and the single winding core 20 may be the second direction y, and a width direction of the battery 1 and the single winding core 20 may be the third direction z. The first direction x, the second direction y and the third direction z may be perpendicular two by two. It should be noted that, limited by the actual processing or measurement error (also called tolerance), the term perpendicular as used throughout this application does not require that the angle between the two must be 90 °, but allows a deviation of ± 10 °, i.e. perpendicular is understood to mean that the angle between any two directions is 80 ° to 100 °.

The packaging bag 10 is formed to surround the battery 1, and can define the appearance of the battery 1, and the packaging bag 11 can protect the winding cores 20, thereby improving the protection effect and safety.

The present application is not limited to the actual form of the package 10, and may be, for example, an aluminum plastic film. Taking the aluminum plastic film as an example, the shape, thickness and other attribute parameters can be determined according to the application requirements.

Taking the packaging bag 10 shown in fig. 1 to 3 as an example, the packaging bag 10 is rectangular in shape as a whole, the packaging bag 10 includes a first end 11 and a second end 12, the first end 11 and the second end 12 are disposed opposite to each other along the second direction y, and a plurality of winding cores 20 are stacked in the packaging bag 10.

The tabs connected by the winding cores 20 are respectively arranged at the two opposite ends of the battery 1 and respectively extend from the first end 11 and the second end 12 of the packaging bag 10, so that the tab stacking problem can be improved, and the packaging difficulty can be reduced.

For example, in the scenario shown in fig. 1 to 3, the battery 1 includes four winding cores 20, namely, a winding core 20a, a winding core 20b, a winding core 20c, and a winding core 20d along the first direction x, and two tabs connected to the winding core 20c and two tabs connected to the winding core 20d are both disposed at the first end of the battery 1, so that the two tabs can be connected to the same circuit board (the first circuit board 31), and the impedance between the two tabs is relatively small. Optionally, the tabs connected by the winding core 20c and the winding core 20d are not overlapped in the first direction x and are arranged at intervals in the third direction z; the two tabs to which the winding core 20a is connected and the two tabs to which the winding core 20b is connected are both disposed at the second end of the battery 1, and optionally, the tabs to which the winding core 20a and the winding core 20b are connected are not overlapped and are disposed at intervals along the third direction z along the first direction x.

The first circuit board 31 is electrically connected to the tabs at the first end 11, the second circuit board 32 is electrically connected to the tabs at the second end 12, and the adaptor 33 electrically connects the first circuit board 31 to the second circuit board 32. In the scenario shown in fig. 1 to 3, the first circuit board 31 connects in series the two tabs connected to the winding core 20d and the two tabs connected to the winding core 20c, the second circuit board 32 connects in series the two tabs connected to the winding core 20a and the two tabs connected to the winding core 20b, and the adapter 33 electrically connects the first circuit board 31 and the second circuit board 32, thereby connecting in series the winding cores 20a to 20 d. Here, the capacity of the battery 1 is equal to or almost equal to the sum of the capacities of the winding cores 20a to 20d, and the energy density is high.

The functions and specific types of the first circuit board 31 and the second circuit board 32 should be set according to the actual required adaptability. For example, at least one of the first circuit board 31 and the second circuit board 32 may be integrated with a BMS (Battery management system) for implementing overcurrent protection, overvoltage protection, charge protection, power detection, output short-circuit protection, temperature detection, and the like of the Battery, thereby ensuring safety. The single Circuit Board may be embodied as a Printed Circuit Board (PCB) or a Flexible Printed Circuit Board (FPC) or a combination of both. The electronic components on the single circuit board are, for example, thermistors, capacitors, transistors, chips, etc.

With reference to fig. 1, the first circuit board 31 may be a main circuit board electrically connected to other external devices, and therefore may be provided with an external terminal 34; the second circuit board 32 is a through circuit board and is mainly used for connecting the tab of the winding core 20 at the second end 12 to the first circuit board 31. Based on this, the current direction for charging the battery 1 is as shown by the arrow in fig. 1, sequentially passes through the tabs (e.g., two tabs connected by the winding core 20d and two tabs connected by the winding core 20c shown in fig. 1) at the first end 11 in the opposite direction of the first direction x, and sequentially passes through the tabs (e.g., two tabs connected by the winding core 20b and two tabs connected by the winding core 20a shown in fig. 1) at the second end 11 in the opposite direction of the first direction x; the direction of the current discharged from the battery is reversed.

To accommodate this, the adaptor 33 is a structural element through which a large bidirectional current can be passed. In practical scenarios, the adaptor 33 includes, but is not limited to: at least one of a flexible circuit board, a printed circuit board, an electronic wire (e.g., cable wire), a metal sheet.

The second circuit board 32 may be used only for connecting the tabs of the second end 12 in series, and thus the size (e.g., one or more of the length, width and height) thereof may be smaller, for example, smaller than the corresponding size of the first circuit board 31, so that the size of the battery 1 on the side of the second end 12 may be reduced, which is advantageous for miniaturization design.

For example, referring to fig. 4, the first circuit board 31 and the second circuit board 32 are perpendicular to the first direction x, so that the second circuit board 32 can be controlled not to protrude from the package bag 10 along the first direction x, and the thickness of the battery 1 is small.

For another example, referring to fig. 5 and fig. 6, the plate of the first circuit board 31 is perpendicular to the first direction x, the plate of the second circuit board 32 is parallel to the first direction x, the thickness of the second circuit board 32 is smaller, the occupied space in the length direction y of the battery 1 is smaller, and the length of the battery 1 is favorably reduced. For a scene where the width (length along the first direction x in fig. 5 and 6) of the second circuit board 32 is less than or equal to the thickness of the battery 1, the second circuit board 32 does not protrude from the packaging bag 10, and the thickness of the battery 1 does not increase.

It should be noted that, limited by the actual processing or measurement errors (also called tolerances), the parallel in the present application does not require that the angle between the two is necessarily 0 ° or 180 °, but allows a deviation of ± 10 °, i.e. parallel is understood to mean that the angle between the directions in which the two are located or extending is 0 ° to 10 ° and 170 ° to 180 °.

In some scenarios, as shown in fig. 5, the tab at the second end 12 may be bent toward the first direction x, which is beneficial to reduce the length of the battery 1, the second circuit board 32 is disposed on a side of the tab of the second end 12 facing the winding core 20, that is, along the second direction y, the second circuit board 32 is sandwiched between the packaging bag 10 and the tab, and the second circuit board 32 and the electronic component thereon may reduce contact with a device (e.g., a battery compartment) that accommodates the battery 1, which is beneficial to protect the second circuit board 32 and the electronic component thereon.

In other scenes, as shown in fig. 6, the tab located at the second end 12 may be bent toward the first direction x, which is beneficial to reducing the length of the battery 1, and the second circuit board 32 is disposed on one side of the tab of the second end 12, which faces away from the winding core 20, so that not only the second circuit board 32 with a large width may be assembled, but also the second circuit board 32 is located outside, which is beneficial to electrically connecting the second circuit board 32 with other external devices.

Example 2

The same reference numerals are used to identify structural elements having the same name. On the basis of the description of the foregoing embodiment, but with the difference that, in the battery 1 of the present embodiment 2, two tabs to which a single jelly roll 20 is connected are provided at the first end 11 and the second end 12 of the battery 1, respectively.

In the scenarios shown in fig. 7 to 9, still taking as an example that the battery 1 includes the winding core 20a, the winding core 20b, the winding core 20c and the winding core 20d stacked along the first direction x, the second tab 22 connected to the winding core 20d, the first tab 21 connected to the winding core 20c, the second tab 22 connected to the winding core 20b and the first tab 21 connected to the winding core 20a are disposed at the first end 11 of the battery 1, and the first tab 21 connected to the winding core 20d, the second tab 22 connected to the winding core 20c, the first tab 21 connected to the winding core 20b and the second tab 22 connected to the winding core 20a are disposed at the second end 12 of the battery 1.

Optionally, as shown in fig. 8, in the first direction x, the four tabs at the first end 11 are not overlapped and are spaced apart from each other in the third direction z; as shown in fig. 9, the four tabs at the second end 12 are not overlapped and are spaced apart from each other along the third direction z; the problem of tab stacking can be improved.

With reference to fig. 7, the second tab 22 connected to the winding core 20d, the first tab 21 connected to the winding core 20c, the second tab 22 connected to the winding core 20b, the first tab 21 connected to the winding core 20a, the second tab 22 connected to the winding core 20a, the first tab 21 connected to the winding core 20b, the second tab 22 connected to the winding core 20c, and the first tab 21 connected to the winding core 20d are electrically connected in sequence. The direction of the current charging the battery 1 is shown by the arrow in fig. 7; the direction of the current discharged from the battery is reversed. Because the positive and negative lugs connected with the single winding core 20 are respectively arranged at two opposite ends of the battery 1, current is mainly transmitted in the winding core 20 body and between the winding cores 20, and charging current and discharging current do not need to pass through the adaptor 33, the adaptor 33 only needs to detect small current, the detected small current can be current generated by the second circuit board 33 for transmitting sampling signals and the like, and the size of the adaptor 33 can be relatively small to adapt to the detection. Moreover, since the current to be passed is small, the current passing cross-sectional area of the adaptor 33 can be smaller as compared with embodiment 1, and for example, it can be a circuit board with a small thickness and a small width; further examples may be thinner electron lines; and may be a relatively thin sheet of metal, for example.

In the scenarios shown in fig. 10 to 12, the battery 1 may include three battery cells, for example, a winding core 20a, a winding core 20b, and a winding core 20c stacked along the first direction x, two tabs connected by a single winding core 20 are also respectively disposed at the first end 11 and the second end 12 of the battery 1, and the manner of electrically connecting the tabs with the first circuit board 31 and the second circuit board 32 may be referred to the above-mentioned manner of electrically connecting fig. 7 to 9.

Referring to fig. 10, the second tab 22 connected to the winding core 20c, the first tab 21 connected to the winding core 20b, the second tab 22 connected to the winding core 20a, the first tab 21 connected to the winding core 20a, the second tab 22 connected to the winding core 20b, and the first tab 21 connected to the winding core 20c are electrically connected in sequence. The direction of the current charging the battery 1 is shown by the arrow in fig. 10; the direction of the current discharged from the battery is reversed. The positive and negative electrode tabs connected to the single winding core 20 are respectively disposed at two opposite ends of the battery 1, and the current is mainly transmitted in the winding core 20 and between the winding cores 20, but as shown by the arrow in fig. 10, after the current passes through the first electrode tab 21 connected to the winding core 20a, the current still needs to be transmitted to the first circuit board 31 through the adaptor 33, so the adaptor 33 needs to pass a large unidirectional current.

Example 3

On the basis of the foregoing description of the embodiment, but with the difference that, in the battery 1 of the present embodiment 2, the plurality of winding cores 20 adopt the tab arrangement of the embodiments 1 and 2, respectively.

For convenience of description, the jelly roll 20 is divided into a first jelly roll to which two tabs are connected and which are disposed at the same end of the battery 1, and a second jelly roll to which two tabs are connected and which are disposed at the first end 11 and the second end 12 of the battery 1, respectively. Referring to fig. 13 to 15, taking the winding core 20a, the winding core 20b and the winding core 20c stacked along the first direction x as an example, the two tabs connected to the first winding core 20a are disposed at the first end 11 of the battery 1, the first tab 21 connected to the second winding core 20b is disposed at the first end 11 of the battery 1, the second tab 22 is disposed at the second end 12 of the battery 1, and the second tab 22 connected to the second winding core 20c is disposed at the first end 11 of the battery 1, and the first tab 21 is disposed at the second end 12 of the battery 1.

Referring to fig. 13, the second tab 22 connected to the second winding core 20c, the first tab 21 connected to the second winding core 20b, the second tab 22 connected to the first winding core 20a, and the first tab 21 connected to the first winding core 20a are electrically connected in sequence. The direction of the current charging the battery 1 is shown by the arrow in fig. 13; the direction of the current discharged by the battery is opposite. Because the current is mainly transmitted in the winding core 20 body and among the winding cores 20, the charging current and the discharging current do not need to pass through the adapter 33, so that the adapter 33 only needs to detect a small current, and the current passing sectional area of the adapter 33 can be smaller.

It should be noted that the battery 1 of the present application may include other numbers of winding cores 20, the winding cores 20 are stacked along the first direction x, and the tabs connected to the winding cores 20 and the manner of electrically connecting the tabs with the first circuit board 31 and the second circuit board 32 may refer to the foregoing embodiments.

The embodiment of the present application further provides an electronic device, which includes a load and the battery 1 according to any of the above embodiments, and the battery 1 supplies power to the load. The electronic device has the battery 1 of any one of the foregoing embodiments, and therefore, the electronic device can produce the advantageous effects that the battery 1 of the corresponding embodiment has.

Electronic devices can be implemented in various specific forms, for example, electronic products such as mobile phones, unmanned aerial vehicles, electric cleaning tools, energy storage products, electric automobiles, electric bicycles, electric navigation tools, and the like. In a practical scenario, the electronic device specifically includes but is not limited to: standby power supply, motor, automobile, motorcycle, moped, bicycle electric tool, household large-scale storage battery, lithium ion capacitor and the like.

It will be understood by those skilled in the art that the configuration according to the embodiments of the present application can be applied to electronic devices of a stationary type, in addition to elements particularly for moving purposes.

The above description is only a part of the embodiments of the present application, and not intended to limit the scope of the present application, and all equivalent structural changes made by using the contents of the present specification and the drawings will be included in the protection scope of the present application for a person skilled in the art.

Although the terms "first, second, etc. are 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. In addition, the singular forms "a", "an" and "the" are intended to include the plural forms as well. The terms "or" and/or "are to be construed as inclusive or meaning any one or any combination. An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some way.

Claims (10)

1. A battery comprises a packaging bag and at least two winding cores arranged in the packaging bag, wherein the at least two winding cores are connected in series and are stacked along a first direction,

the tabs connected with the at least two winding cores are respectively arranged at a first end and a second end of the battery, and the first end and the second end are oppositely arranged along a second direction;

the battery further comprises a first circuit board, a second circuit board and an adapter; the lug at the first end is electrically connected with the first circuit board, the lug at the second end is electrically connected with the second circuit board, and the adapter piece electrically connects the first circuit board with the second circuit board.

2. The battery of claim 1, wherein a single jellyroll couples two tabs, both of which are located at the same end of the jellyroll.

3. The battery of claim 1, wherein a single winding core connects two tabs disposed at the first end and the second end, respectively.

4. The battery of claim 1, wherein the at least two winding cores comprise a first winding core and a second winding core, wherein two tabs connected by the first winding core are disposed at the same end of the battery, and two tabs connected by the second winding core are disposed at the first end and the second end, respectively.

5. The battery according to any one of claims 1 to 4, wherein the plate body of the second circuit board is perpendicular to the first direction.

6. The battery according to any one of claims 1 to 4, wherein the plate body of the second circuit board is parallel to the first direction.

7. The battery of claim 6, wherein the tab at the second end is bent toward the first direction.

8. The battery of claim 7, wherein the second circuit board is disposed on a side of the tab of the second end facing the jelly roll or a side facing away from the jelly roll.

9. The battery of claim 1, wherein the interposer comprises at least one of a flexible circuit board, a printed circuit board, an electronics cord, a metal sheet.

10. An electronic device comprising a load, and the battery of any one of claims 1 to 9, the battery being electrically connected to the load to power the load.

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