CN115084794A

CN115084794A - Battery and electronic equipment

Info

Publication number: CN115084794A
Application number: CN202110877359.7A
Authority: CN
Inventors: 卢轮; 朱华; 陈伟; 陈宇飞; 邓斌
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2021-03-15
Filing date: 2021-07-31
Publication date: 2022-09-20
Also published as: WO2022193935A1

Abstract

The application provides a battery and electronic equipment relates to electronic equipment technical field, can compromise high energy density and quick charge characteristic to a certain extent simultaneously. Specifically, the battery comprises a shell, a first naked battery cell, a second naked battery cell and a third tab; the first bare cell is arranged in the shell and comprises a first pole piece, a second pole piece and a first pole lug, and the first pole lug is electrically connected to a current collector of the first pole piece; the second bare cell is arranged in the shell and comprises a third pole piece, a fourth pole piece and a second pole lug, and the second pole lug is electrically connected to a current collector of the third pole piece; the third pole lug leads out the electrodes of the second pole piece and the fourth pole piece simultaneously, and one end of the first pole lug, one end of the second pole lug and one end of the third pole lug penetrate through the shell and extend out of the shell. The battery that this application embodiment provided is used for providing the electric quantity for electronic equipment.

Description

Battery and electronic equipment

The present application claims priority from the chinese patent application entitled "a battery and its structure" filed by the national intellectual property office at 15/03/2021 under the application number 202110276595.3, the entire contents of which are incorporated herein by reference.

Technical Field

The present application relates to the field of electronic devices, and in particular, to a battery and an electronic device.

Background

With the continuous enhancement of the performance of consumer electronics products such as mobile phones, the requirements on battery life and charging speed are higher and higher. However, for a battery, long endurance and fast charging are two characteristics which are generally difficult to be compatible, the increase of the battery capacity is often accompanied by the weakening of the fast charging capability, and the increase of the fast charging capability generally leads to the loss of the energy density of the battery, namely the reduction of the battery capacity per unit volume. It is difficult to find a battery which can simultaneously achieve high energy density and rapid charging characteristics in the market at present.

Disclosure of Invention

Embodiments of the present application provide a battery and an electronic device that can compromise high energy density and quick charge characteristics to a certain extent simultaneously.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, some embodiments of the present application provide a battery including a housing, a first bare cell, a second bare cell, and a third tab. First naked electric core sets up in the casing. First naked electric core includes first pole piece, second pole piece and first utmost point ear. One of the first pole piece and the second pole piece is a positive pole piece and the other is a negative pole piece. The first tab is electrically connected to the current collector of the first pole piece. The naked electric core of second sets up in the casing, and the naked electric core of second includes third pole piece, fourth pole piece and second utmost point ear. One of the third pole piece and the fourth pole piece is a positive pole piece and the other is a negative pole piece. The second pole piece is electrically connected to the current collector of the third pole piece. The third pole lug leads out the electrodes of the second pole piece and the fourth pole piece simultaneously, and one end of the first pole lug, one end of the second pole lug and one end of the third pole lug penetrate through the shell and extend out of the shell.

Thus, the first tab and the third tab of the battery form a first charging/discharging port, and the second tab and the third tab of the battery form a second charging/discharging port. At least two charge and discharge links can be formed by the first charge and discharge port and the second charge and discharge port, so that the charge and discharge speed of the battery can be improved. Meanwhile, the first charge and discharge port and the second charge and discharge port share the third lug, so that the number of lugs in the battery can be reduced, and the volume energy density of the battery is ensured. Therefore, the charging and discharging speed and the volume energy density of the battery are considered simultaneously to a certain extent. Meanwhile, the number of the lugs in the battery is small, so that the width of a single lug (comprising a first lug, a second lug and a third lug) can be widened on the premise that the size of the battery is fixed, the charging capacity is further improved, and the heat dissipation effect is optimized.

In a possible implementation manner of the first aspect, the current collector of the second pole piece is electrically connected to the current collector of the fourth pole piece to form a whole, and the third pole piece is electrically connected to the whole. Therefore, the third tab is arranged at more positions, and the flexibility is better.

In a possible implementation manner of the first aspect, the current collector of the second pole piece and the current collector of the fourth pole piece are electrically connected into the whole by means of contact electrical conduction, direct welding or integral forming. Like this, the occupation space at the electric connection position between first naked electric core and the naked electric core of second is less, is favorable to improving the volume energy density of battery.

In a possible implementation manner of the first aspect, the third tab may be electrically connected to a partial current collector belonging to the second pole piece in the whole body, and may also be electrically connected to a partial current collector belonging to the fourth pole piece in the whole body. The third pole ear may also be located between the second pole piece and the fourth pole ear. On the basis, the third pole piece is electrically connected to the partial current collector belonging to the second pole piece in the whole body and the partial current collector belonging to the fourth pole piece in the whole body.

In one possible implementation of the first aspect, the third tab may be electrically connected to a portion of the second pole piece adjacent to the fourth pole piece. Therefore, the distance from the third lug to each part of the fourth lug can be shortened, so that the impedance can be reduced to a certain extent, and the charging and discharging speed can be increased.

In one possible implementation of the first aspect, the third tab may be electrically connected to a portion of the fourth pole piece that is close to the second pole piece. Therefore, the distance from the third lug to each part of the second lug can be shortened, so that the impedance can be reduced to a certain extent, and the charging and discharging speed can be increased.

In a possible implementation manner of the first aspect, the number of the third tabs is two, and both the third tabs are electrically connected to the partial current collectors belonging to the second pole piece in the whole. The two third lugs form first charge and discharge ports with the first lugs respectively, and therefore the two first charge and discharge ports are obtained. And the two third lugs and the second lug form second charging and discharging ports respectively, so that two second charging and discharging ports are obtained. Therefore, four charging and discharging links can be formed, and the charging and discharging speed of the battery can be improved to a certain extent.

In a possible implementation of the first aspect, the first bare cell and the second bare cell are both winding bare cells.

In a possible implementation of the first aspect, the first bare cell and the second bare cell are both laminated bare cells. First naked electric core and the range upon range of setting of the naked electric core of second. The surface of the first naked electric core close to the second naked electric core is formed by the current collector of the second pole piece. The surface of the naked electric core of second near first naked electric core is formed by the current collector of fourth pole piece. The mass flow body of this second pole piece of first naked electric core and the mass flow body electrical connection of this fourth pole piece of the naked electric core of second become a whole. On the basis of which the third pole lug is electrically connected to the whole. The structure is simple and easy to realize.

In a possible implementation of the first aspect, the first bare cell and the second bare cell are both laminated bare cells. First naked electric core sets up side by side with the naked electric core of second. The quantity of the second pole piece of first naked electric core equals with the quantity of the fourth pole piece of the naked electric core of second, the second pole piece of first naked electric core and the fourth pole piece one-to-one of the naked electric core of second, and the mass flow body of every second pole piece all becomes a whole with the mass flow body electrical connection of the fourth pole piece that corresponds. On the basis, the third pole lug comprises a plurality of pole lug units. The plurality of tab units are electrically connected to the plurality of integers respectively. The structure is simple and easy to realize.

In a possible implementation manner of the first aspect, the third tab is disposed between a current collector of the second pole piece and a current collector of the fourth pole piece, the third tab is electrically connected to the current collector of the second pole piece, the third tab is further electrically connected to a current collector of the fourth pole piece, and one end of the first tab, the second tab and the third tab penetrates through the casing and extends out of the casing.

In a possible implementation manner of the first aspect, the third pole piece includes a plurality of pole piece units and a switching conductor, the plurality of pole piece units are respectively formed by directly extending a current collector of the second pole piece and a current collector of the fourth pole piece, and the switching conductor is electrically connected with the plurality of pole piece units.

In a possible implementation manner of the first aspect, the first pole piece is a positive pole piece, the second pole piece is a negative pole piece, the third pole piece is a positive pole piece, and the fourth pole piece is a negative pole piece. On the basis, the first tab is electrically connected to the current collector of the first pole piece, the second tab is electrically connected to the current collector of the third pole piece, and the third tab is used for leading out electrodes of the second pole piece and the fourth pole piece. Therefore, the first tab and the second tab are positive tabs, and the third tab is a negative tab. First naked electric core and the naked electric core of second are parallelly connected to become compound naked electric core. The first charge and discharge port and the second charge and discharge port are arranged in parallel.

In a possible implementation manner of the first aspect, the first pole piece is a negative pole piece, the second pole piece is a positive pole piece, the third pole piece is a negative pole piece, and the fourth pole piece is a positive pole piece. On the basis, the first tab is electrically connected to the current collector of the first pole piece, the second tab is electrically connected to the current collector of the third pole piece, and the third tab is used for leading out electrodes of the second pole piece and the fourth pole piece. Therefore, the first tab and the second tab are negative electrode tabs, and the third tab is a positive electrode tab. First naked electric core and the naked electric core of second are parallelly connected to become compound naked electric core. The first charge and discharge port and the second charge and discharge port are arranged in parallel.

In a possible implementation manner of the first aspect, the first pole piece is a positive pole piece, the second pole piece is a negative pole piece, the third pole piece is a negative pole piece, and the fourth pole piece is a positive pole piece. On the basis, the first tab is electrically connected to the current collector of the first pole piece, the second tab is electrically connected to the current collector of the third pole piece, and the third tab is used for leading out electrodes of the second pole piece and the fourth pole piece. Therefore, first utmost point ear is anodal utmost point ear, and the second utmost point ear is the negative pole utmost point ear, and the third utmost point ear is the anodal utmost point ear of the naked electric core of second simultaneously for the negative pole utmost point ear of first naked electric core. First naked electric core and the naked electric core of second are established ties into compound naked electric core. The first charge and discharge port and the second charge and discharge port are arranged in series.

In a possible implementation manner of the first aspect, the first pole piece is a negative pole piece, the second pole piece is a positive pole piece, the third pole piece is a positive pole piece, and the fourth pole piece is a negative pole piece. On the basis, the first tab is electrically connected to the current collector of the first pole piece, the second tab is electrically connected to the current collector of the third pole piece, and the third tab is used for leading out electrodes of the second pole piece and the fourth pole piece. Therefore, first utmost point ear is the negative pole utmost point ear, and the second utmost point ear is anodal utmost point ear, and the third utmost point ear is the anodal utmost point ear of first naked electric core and is the negative pole utmost point ear of the naked electric core of second simultaneously. First naked electric core and the naked electric core of second are established ties into compound naked electric core. The first charge and discharge port and the second charge and discharge port are arranged in series.

In a possible implementation of the first aspect, the first bare cell and the second bare cell are winding bare cells or lamination bare cells.

In a possible implementation manner of the first aspect, the first bare cell is a first winding-type bare cell. The winding center of the first winding type naked battery cell is the first winding center. One end of the first pole piece located at the first winding center exceeds one end of the second pole piece located at the first winding center. That is, it is assumed that an end of the first pole piece located at the first winding center is a first end of the first pole piece, an end of the second pole piece located at the first winding center is a first end of the second pole piece, and an orthographic projection of the first end of the first pole piece on the first end of the second pole piece is located outside an edge of the second pole piece. The first tab is electrically connected to the current collector at the first end of the first pole piece. So, in the naked electric core of first winding formula, the relative both sides of first utmost point ear all are surrounded by first pole piece, need not to adopt utmost point ear to glue and carry out the insulation and keep apart the processing, can further improve the volume energy density of battery from this.

In a possible implementation of the first aspect, the bare cell of the second winding type is a bare cell of the second winding type. The winding center of the naked electric core of second coiling formula is the second center of coiling. One end of the third pole piece positioned at the second winding center exceeds one end of the fourth pole piece positioned at the second winding center. That is, it is assumed that an end of the third pole piece located at the second winding center is a first end of the third pole piece, an end of the fourth pole piece located at the second winding center is a first end of the fourth pole piece, and an orthographic projection of the first end of the third pole piece on the first end of the fourth pole piece is located outside an edge of the fourth pole piece. The second pole lug is electrically connected to the current collector at the first end of the third pole piece. So, in the naked electric core of second coiling formula, the relative both sides of second utmost point ear are all surrounded by the third pole piece, need not to adopt utmost point ear to glue to carry out the insulation and keep apart the processing, can further improve the volume energy density of battery from this.

In a possible implementation manner of the first aspect, the first tab and the third tab form a first charging and discharging port, and the second tab and the third tab form a second charging and discharging port. The battery also includes a protection plate having a first charge and discharge circuit, a second charge and discharge circuit, a third charge and discharge port, and a fourth charge and discharge port. The first charge and discharge circuit is electrically connected with the first naked electric core by means of the first charge and discharge port, and the third charge and discharge port is located the first charge and discharge circuit, and the protection shield is used for being electrically connected with the power management module, the charge management module and the charger by means of the third charge and discharge port to form a charge and discharge link. The second charge-discharge circuit is electrically connected with the second naked electric core by means of a second charge-discharge port, the fourth charge-discharge port is located on the second charge-discharge circuit, and the protection board is used for being electrically connected with the power management module, the charge management module and the charger by means of the fourth charge-discharge port so as to form another charge-discharge link. So, form two at least charge-discharge links, can improve the charge-discharge speed of battery, simultaneously with the help of these two at least charge-discharge links, can carry out charge-discharge management and capacity, cycle number, the detection of parameters such as health to one in first naked electric core and the naked electric core of second respectively, also can carry out charge-discharge management and capacity, cycle number, the detection of parameters such as health to two naked electric cores of first naked electric core and second simultaneously. The maximized utilization of the performance and the health state of the battery is completed, and when one naked battery cell is charged, the other naked battery cell is discharged.

In a possible implementation manner of the first aspect, the battery further includes a third bare cell, the third bare cell is disposed in the casing, the third bare cell includes a fifth pole piece, a sixth pole piece and a fourth pole ear, one of the fifth pole piece and the sixth pole piece is a positive pole piece, and the other is a negative pole piece, and the fourth pole ear is electrically connected to a current collector of the fifth pole piece. The current collector of the sixth pole piece and the current collector of the second pole piece are electrically connected into a whole, or the current collector of the sixth pole piece and the current collector of the fourth pole piece are electrically connected into a whole, and one end of the fourth pole lug penetrates through the shell and extends out of the shell. In this way, the third tab can draw out the electrode of the sixth pole piece in addition to the electrodes of the second pole piece and the fourth pole piece, and the volume energy density can be taken into consideration while further optimizing the charge-discharge speed.

In one possible implementation manner of the first aspect, the battery further includes a third bare cell and a fifth tab. The naked electric core of third sets up in the casing, and the naked electric core of third includes fifth pole piece, sixth pole piece and fourth pole ear, and one in fifth pole piece and the sixth pole piece is positive pole piece and another is the negative pole piece, and fourth pole ear electric connection is on the mass flow body of fifth pole piece. The fifth tab is arranged between the current collector of the second pole piece and the current collector of the sixth pole piece, electrically connected to the current collector of the second pole piece, and further electrically connected to the current collector of the sixth pole piece. Or the fifth tab is arranged between the current collector of the fourth pole piece and the current collector of the sixth pole piece, electrically connected to the current collector of the fourth pole piece, and electrically connected to the current collector of the sixth pole piece. One end of the fourth tab and one end of the fifth tab penetrate through the shell and extend out of the shell. This makes it possible to achieve a certain balance between the volumetric energy density and the charge/discharge rate of the battery.

In a possible implementation manner of the first aspect, the battery further includes a third bare cell. The naked electric core of third sets up in the casing, and the naked electric core of third includes fifth pole piece, sixth pole piece and fourth utmost point ear. One of the fifth pole piece and the sixth pole piece is a positive pole piece, the other one is a negative pole piece, and the fourth pole piece is electrically connected to a current collector of the fifth pole piece. The third tab also includes a tab portion. The structure of the lug part is similar to that of the lug unit, the lug part is formed by directly extending the current collector of the sixth pole piece, and the switching conductor is also electrically connected with the lug part. This makes it possible to achieve a certain balance between the volume energy density and the charge/discharge rate of the battery.

In a possible implementation manner of the first aspect, the switching conductor may further extend between the first bare cell and the second bare cell. Suppose that the portion of the transit conductor that stretches into between first naked electric core and the naked electric core of second is first portion. The surface that is close to the naked electric core of second of first naked electric core is formed by the mass flow of second pole piece, and the surface that is close to first naked electric core of second naked electric core is formed by the mass flow of fourth pole piece. The first part is electrically connected to the current collector of the second pole piece, and the first part is also electrically connected to the current collector of the fourth pole piece. Like this, between switching conductor and the first naked electric core to and the area of contact between switching conductor and the naked electric core of second is great, can reduce impedance, increase charge-discharge speed.

In a second aspect, some embodiments of the present application provide an electronic device, which includes a housing, a power management module, a charging management module, and a battery as set forth in any of the above aspects. Wherein, a battery cabin is arranged in the shell. The power management module and the charging management module are arranged in the shell. The battery is installed in the battery compartment, the battery is electrically connected with the power management module, and the battery is also electrically connected with the charging management module.

Because the electronic equipment provided by the embodiment of the application comprises the battery in any technical scheme, the electronic equipment and the battery can solve the same technical problem and achieve the same effect.

In a third aspect, some embodiments of the present application further provide a method for processing a battery, the method including:

manufacturing a first naked electric core and a second naked electric core;

arranging a third tab between the first bare cell and the second bare cell, welding the third tab on a current collector of a second pole piece in the first bare cell, and welding the third tab on a current collector of a fourth pole piece in the second bare cell to obtain a composite bare cell connected in series or in parallel;

adopt the above-mentioned compound naked electric core of casing encapsulation to pour into electrolyte into in the casing, in order to obtain electric core.

And connecting a protective plate on the battery core to obtain a finished battery with at least two series or parallel or combined series and parallel winding cores inside.

In a fourth aspect, some embodiments of the present application provide a battery processing system including a first rolling device, a first winding pin, a second rolling device, and a second winding pin.

In the system of processing that this application embodiment provided, can roll up simultaneously and roll up with the help of first rolling press device, first book needle, second rolling press device and second and roll up the needle and form first naked electric core and the naked electric core of second, the example, can adopt first rolling press device roll extrusion and adopt first book needle to roll up and form first naked electric core, adopt the second rolling press device roll extrusion and adopt the second to roll up the needle and roll up and form the naked electric core of second simultaneously. Like this, can improve the production efficiency of the naked electric core of first naked electric core and second.

In a possible implementation manner of the fourth aspect, the welding device further includes a welding station, and the welding station is disposed between the first winding needle and the second winding needle. Therefore, the welding station can be adopted to realize the welding of the third tab on the first naked electric core and the second naked electric core, and the production efficiency of the battery can be improved.

Drawings

Fig. 1 is a perspective view of an electronic device provided by some embodiments of the present application;

FIG. 2 is an exploded view of the electronic device shown in FIG. 1;

fig. 3 is a perspective view of a battery provided by some embodiments of the present application;

fig. 4 is an exploded view of the battery shown in fig. 3;

fig. 5 is an exploded view of the battery cell of fig. 4;

fig. 6 is a schematic structural diagram of a battery according to further embodiments of the present application;

fig. 7 is an exploded view of the battery shown in fig. 6;

fig. 8 is a schematic structural diagram of a battery according to further embodiments of the present application;

fig. 9 is an exploded view of the battery shown in fig. 8;

fig. 10 is a schematic end-face structure view of a first bare cell in the battery shown in fig. 9;

fig. 11 is a schematic cross-sectional structure view of a portion of the first bare cell shown in fig. 10, taken along the direction a-a;

fig. 12 is a schematic structural diagram of the first pole piece in the first bare cell shown in fig. 10 in an unfolded state;

fig. 13 is another schematic structural diagram of the first pole piece in the first bare cell shown in fig. 10 in an unfolded state;

fig. 14 is another schematic structural diagram of the first pole piece in the first bare cell shown in fig. 10 in an unfolded state;

fig. 15 is a schematic diagram of a connection structure between a first pole piece and a first tab in a first bare cell according to yet another embodiment of the present application;

fig. 16 is a schematic structural view of the first pole piece, the diaphragm, and the second pole piece shown in fig. 15 after being stacked and wound to form a first bare cell;

fig. 17 is a schematic view of a connection structure between a first pole piece and a first tab in a first bare cell according to still other embodiments of the present application in an unfolded state;

fig. 18 is a schematic structural diagram of a first bare cell according to further embodiments of the present application;

fig. 19 is a schematic cross-sectional view of the first bare cell shown in fig. 18 at line b-b;

fig. 20 is a schematic cross-sectional view of the first bare cell shown in fig. 18 at line b-b;

fig. 21 is a schematic end-view structure of a second bare cell in the battery of fig. 9;

fig. 22 is a schematic cross-sectional structure view of a portion of the second bare cell shown in fig. 21, taken along the direction c-c;

fig. 23 is a schematic diagram of a connection structure between the first bare cell shown in fig. 10 and the second bare cell shown in fig. 21;

FIG. 24 is a schematic cross-sectional view of the structure of FIG. 23 taken along line d-d;

fig. 25 is a schematic view of yet another connection structure between the first bare cell shown in fig. 10 and the second bare cell shown in fig. 21;

fig. 26 is a schematic view of yet another connection structure between the first bare cell shown in fig. 10 and the second bare cell shown in fig. 21;

fig. 27 is a schematic view of a connection structure between a first bare cell and a second bare cell according to still other embodiments of the present application;

FIG. 28 is a schematic cross-sectional view of the structure of FIG. 27 taken along line e-e;

fig. 29 is a schematic view of a connection structure between a first bare cell and a second bare cell according to still other embodiments of the present application;

fig. 30 is a schematic view of a connection structure between a first bare cell and a second bare cell according to still other embodiments of the present application;

fig. 31 is a schematic view of a connection structure between a first bare cell and a second bare cell according to still other embodiments of the present application;

fig. 32 is a schematic view of a connection structure between a first bare cell and a second bare cell according to still other embodiments of the present application;

FIG. 33 is a schematic view of the connection structure shown in FIG. 32, as viewed from direction A;

fig. 34 is a schematic structural view of a battery provided in accordance with still other embodiments of the present application;

fig. 35 is an exploded view of the battery of fig. 34;

fig. 36 is a schematic end view of the first bare cell in the battery of fig. 35;

fig. 37 is a schematic end view of a second bare cell in the battery of fig. 35;

fig. 38 is a schematic view of a connection structure between a third tab in fig. 35 and the first bare cell shown in fig. 36 and the second bare cell shown in fig. 37;

fig. 39 is a schematic structural view of a first bare cell, a second bare cell, and a third tab according to still other embodiments of the present application;

fig. 40 is a schematic structural view of a first bare cell, a second bare cell, and a third tab according to still other embodiments of the present application;

fig. 41 is a schematic structural view of a battery according to further embodiments of the present application;

fig. 42 is an exploded view of the battery shown in fig. 41;

fig. 43 is a schematic diagram of a connection structure of a first bare cell and a second bare cell in the battery of fig. 42;

FIG. 44 is a schematic cross-sectional view of the structure of FIG. 43 taken along line f-f;

FIG. 45 is a schematic cross-sectional view of the structure of FIG. 43 taken along line g-g;

FIG. 46a is a schematic cross-sectional view of the structure of FIG. 43 taken along line h-h;

FIG. 46b is a schematic view of an alternative cross-sectional configuration of the structure shown in FIG. 43 taken along line h-h;

fig. 47 is a schematic diagram of a connection structure of a first bare cell and a second bare cell in a battery according to still other embodiments of the present application;

fig. 48 is a schematic diagram of a connection structure between a first bare cell and a second bare cell in a battery according to still other embodiments of the present application;

fig. 49 is a schematic structural view of a first bare cell, a second bare cell, and a third tab according to still other embodiments of the present application;

fig. 50 is a schematic structural diagram of a composite bare cell according to further embodiments of the present application;

fig. 51 is a schematic end-face structure view of the composite bare cell shown in fig. 50;

fig. 52 is a schematic end-face structure view of a composite bare cell according to further embodiments of the present application;

fig. 53 is a schematic end-face structure view of a composite bare cell according to yet further embodiments of the present application;

fig. 54 is a schematic end face structure of a composite bare cell according to yet other embodiments of the present application;

fig. 55 is a schematic diagram illustrating a first bare cell component of a method of processing a battery according to some embodiments of the present disclosure;

FIG. 56 is a schematic diagram of a battery processing system according to some embodiments of the present application;

fig. 57 is a schematic structural diagram illustrating a second bare cell in a method of processing a battery according to some embodiments of the present disclosure;

fig. 58 is a process flow diagram of a battery provided in accordance with some embodiments of the present application.

Detailed Description

In the embodiments of the present application, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features.

In the embodiments of the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the embodiment of the present application, "and/or" is only one kind of association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.

Before describing embodiments of the present application, in order to facilitate the description of the embodiments below, some terms of art to which the embodiments of the present application will be referred will be described, specifically:

the casing of the battery: refers to the portion of the battery used to encapsulate and protect the bare cell, and the casing includes, but is not limited to, a steel casing and an aluminum plastic film.

Aluminum plastic film: also known as an aluminum-plastic packaging film, comprises at least three layers of material. The middle layer is an aluminum layer and plays a role in isolating moisture. The outer layer is a nylon (ny l on) glue layer and plays a role in preventing air, particularly oxygen, from penetrating. The inner layer is a polypropylene (PP) layer, which plays a role in sealing and preventing the electrolyte from corroding the aluminum layer. The inner layer of the aluminum-plastic film is contacted with the electrolyte.

Electrolyte solution: and the lithium ion battery cell is present in each gap of the naked battery cell in the shell and is used as a carrier for transmitting lithium ions in the battery. The electrolyte is generally prepared from high-purity organic solvent, electrolyte lithium salt, necessary additives and other raw materials according to a certain proportion under certain conditions.

Naked electric core: comprises a positive pole piece, a negative pole piece and a diaphragm. The positive pole piece and the negative pole piece both comprise a current collector and an electrode material coated on the current collector. The current collector of the positive electrode sheet is typically an aluminum foil. The current collector of the negative pole piece is usually a copper foil. The diaphragm is also called as an isolating film and is arranged between the positive pole piece and the negative pole piece and used for isolating the positive pole piece and the negative pole piece of the bare cell so as to prevent the two pole pieces from being in direct contact to generate short circuit. The material of the separator is usually a polyolefin porous film.

Naked electric core of coiling formula: the diaphragm is formed by laminating four layers of materials, namely a positive pole piece, a diaphragm, a negative pole piece and the diaphragm, and then winding the materials.

Naked electric core of lamination formula: the lithium ion battery comprises positive pole pieces and negative pole pieces which are sequentially and alternately stacked together, wherein a diaphragm is arranged between every two adjacent positive pole pieces and negative pole pieces. The positive pole piece and the negative pole piece both comprise a current collector and an electrode material coated on the current collector. The current collector of the positive electrode sheet is typically an aluminum foil. The current collector of the negative pole piece is usually a copper foil. The diaphragm is used for separating the positive pole piece from the negative pole piece so as to prevent the two pole pieces from being in direct contact to generate short circuit. The diaphragm can be the diaphragm bag, also can be along the folding diaphragm of Z style of calligraphy, still can be the diaphragm of a plurality of monolithic, and the concrete structural style of diaphragm in the naked electric core of lamination formula is not injectd in this application, as long as can insulate isolation positive pole piece and negative pole piece can. The material of the separator is usually a polyolefin porous film. Compare in the naked electric core of coiling formula, the naked electric core of lamination formula possesses stronger quick charge ability, and shape and utmost point ear position design flexibility are more excellent.

And (3) pole lug: and the electrode is used for leading out the electrode of the naked battery cell to the outside of the shell. Specifically, the tab for leading out the positive electrode of the bare cell is a positive electrode tab, and the tab for leading out the negative electrode of the bare cell is a negative electrode tab. A naked electric core includes at least one anodal utmost point ear and at least one negative pole utmost point ear. The positive pole lug can be connected to the current collector of the positive pole piece in the naked electric core in a welding mode, and can also be formed by the direct extension of the current collector of the positive pole piece. In a similar way, the negative pole tab can be connected to the current collector of the negative pole piece in the bare cell in a welding mode, and can also be formed by the direct extension of the current collector of the negative pole piece. The positive electrode tab is typically an aluminum strip. The negative electrode tab is typically a nickel strap. Specifically, the structural forms of the positive electrode tab and the negative electrode tab in the following embodiments will be described in detail in the text and with reference to the drawings, and will not be described herein. In order to avoid short circuit between the tab and a metal layer in the housing (such as an aluminum layer in an aluminum-plastic film), a tab glue is usually coated on a portion of the tab penetrating through the housing to perform an insulating and isolating function.

Battery cell: the structure that obtains after using the casing to pack naked electric core and injecting into electrolyte is electric core promptly.

Protecting the board: the circuit board is integrated with a sampling resistor and a current fuse, and is used for avoiding the situations of overcharge, overdischarge, overcurrent, short circuit, ultrahigh-temperature charge and discharge and the like of the battery.

Packaging the battery: and combining the battery core, the protection plate and other auxiliary materials into a whole to manufacture the complete battery.

The application provides an electronic device. The electronic device is a type of electronic device that includes a battery. Specifically, the electronic device includes, but is not limited to, a mobile phone, a tablet computer (tab et personal computer), a laptop computer (laptop computer), a Personal Digital Assistant (PDA), a personal computer, a Notebook computer (Notebook), a vehicle-mounted device, and a wearable device.

Referring to fig. 1 and fig. 2, fig. 1 is a perspective view of an electronic device 100 according to some embodiments of the present disclosure, and fig. 2 is an exploded view of the electronic device 100 shown in fig. 1. In this embodiment, the electronic device 100 is a mobile phone. Specifically, the electronic device 100 includes a housing 10, a power utilization device, a charging management module, a power management module, and a battery 20.

It is to be understood that fig. 1 and 2 and the related drawings below only schematically illustrate some components included in the electronic device 100, and the actual shape, the actual size, the actual position and the actual configuration of the components are not limited by fig. 1 and 2 and the following drawings. Further, an XYZ coordinate system is established for the convenience of the description of the embodiments below. Specifically, the width direction of the electronic device 100 is defined as the X-axis direction, the length direction of the electronic device 100 is defined as the Y-axis direction, and the thickness direction of the electronic device 100 is defined as the Z-axis direction. It is understood that the coordinate system setting of the electronic device 100 can be flexibly set according to actual needs, and is not particularly limited herein.

The housing 10 includes a light-transmissive cover plate 11, a back cover 12, and a bezel 13. The material of the light-transmissive cover plate 11 includes, but is not limited to, glass and plastic. The light-transmitting cover plate 11 and the back cover 12 are stacked and spaced apart from each other. The material of the frame 13 and the back cover 12 includes, but is not limited to, metal and plastic. The frame 13 is located between the transparent cover plate 11 and the back cover 12, and the frame 13 is fixed on the back cover 12. Illustratively, the frame 13 may be fixedly attached to the back cover 12 by an adhesive. The frame 13 may also be formed integrally with the back cover 12, that is, the frame 13 and the back cover 12 are a unitary structure. The light-transmitting cover plate 11 is fixed on the frame 13. In some embodiments, the light-transmissive cover plate 11 may be fixed to the frame 13 by gluing. The light-transmitting cover plate 11, the back cover 12 and the frame 13 enclose an internal accommodating space of the electronic device 100. The internal receiving space receives therein the electric device, the charge management module, the power management module, and the battery 20.

A battery compartment 30 is provided in the housing 10. The battery compartment 30 is used to house the battery 20. In some embodiments, referring to fig. 2, the electronic device 100 further includes a midplane 40. The middle plate 40 is located in the internal receiving space of the electronic device 100 and is fixed to the inner surface of the bezel 13 for a circle. For example, the middle plate 40 may be fixed on the frame 13 by welding, or may be integrally formed with the frame 13. The middle plate 40 serves as a support "skeleton" in the electronic apparatus 100, and is used to support a camera module 60 (see fig. 2), a main board, a sub-board, a speaker module, and the like. The material of the middle plate 40 includes, but is not limited to, metal and plastic. In order to ensure the supporting performance of the middle plate 40, the material of the middle plate 40 is optionally a metal, specifically, the metal includes, but is not limited to, stainless steel, magnesium aluminum alloy, and the like. The battery compartment 30 is a groove provided on the surface of the middle plate 40 facing the back cover 12. In other embodiments, the middle plate 40 forms a bottom wall of the battery compartment, electronic components such as a main board, a speaker module, and a sub-board are disposed in the accommodating space between the middle plate 40 and the back cover 12, the electronic components form two opposite side walls of the battery compartment 30 arranged in the Y-axis direction, and two sides of the frame 13 extending in the Y-axis direction respectively form two other opposite side walls of the battery compartment 30 arranged in the X-axis direction. In other embodiments, the middle plate 40 may not be disposed in the electronic device 100, and the display screen 50 in fig. 2 is used to form the bottom wall of the battery compartment 30, and the main board, the speaker module, the sub-board, and the frame 13 form the side walls of the battery compartment 30. And is not particularly limited herein.

The battery 20 is mounted in the battery compartment 30, and the battery 20 is used to supply power to the electric devices in the electronic apparatus 100. Specifically, the electrical appliance includes, but is not limited to, one or more of the display screen 50 (see fig. 2), the camera module 60, the main board, the sub-board, the speaker module, and the fingerprint identification module, which is not limited herein.

The power management module is electrically connected between the battery 20 and the electrical consumer. The power management module is configured to receive input from the battery 20 and discharge the electrical device to power the electrical device. The power management module may also be used to monitor parameters such as the capacity of the battery 20, the number of charge and discharge cycles, and the state of health (leakage, impedance).

The charge management module is electrically connected between the charger and the battery 20. The charging management module is configured to receive a charging input from a charger. The charger can be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module may receive a charging input of the wired charger through a Universal Serial Bus (USB) interface. In some wireless charging embodiments, the charging management module may receive the wireless charging input through a wireless charging coil of the electronic device. The power management module and the charging management module may be integrated into a whole or may be arranged separately, and are not limited specifically herein.

Referring to fig. 3 and 4, fig. 3 is a perspective view of a battery 20 according to some embodiments of the present disclosure, and fig. 4 is an exploded view of the battery 20 shown in fig. 3. In the present embodiment, the battery 20 is a lithium ion battery. The battery 20 includes a cell 21 and a protective sheet 22.

Referring to fig. 5, fig. 5 is an exploded view of the battery cell 21 in the battery 20 shown in fig. 4. The battery cell 21 includes a case 211 and a bare cell 212.

The case 211 encloses an electrolyte. The bare cell 212 is located within the housing 211 and is immersed in the electrolyte. The bare cell 212 has two tabs 213. One of the two tabs 213 is a positive electrode tab, and the other is a negative electrode tab. One end of the tab 213 is electrically connected to the bare cell 212, and the other end of the tab 213 penetrates through the housing 211 and extends out of the housing 211. Referring back to fig. 4, protective plate 22 is disposed outside housing 211, and protective plate 22 is electrically connected to the portion of tab 213 located outside housing 211. The protection plate 22 has a charge and discharge port D having a positive electrode terminal and a negative electrode terminal. The positive terminal is communicated with the positive electrode tab, and the negative terminal is communicated with the negative electrode tab. The charging and discharging port D is electrically connected with the power supply management module, the charging management module and the charger through a positive terminal and a negative terminal so as to realize charging and discharging management and detection of parameters such as capacity, cycle frequency, health state and the like.

The battery 20 shown in fig. 3-5 only includes a single cell, and the single cell only implements charging and discharging of the battery 20 through two tabs 213, and the charging and discharging link is single, the cell impedance is large, and large current charging cannot be borne, so the charging speed is low, and rapid charging cannot be implemented. On the other hand, since the charge and discharge link of the battery 20 shown in fig. 3 to 5 is single, and the cell impedance is large, the overall temperature rise of the battery 20 is large in the charge and discharge process, and the thermal safety performance of the battery is low.

To solve the above problem, a feasible design idea is to arrange at least two bare cells in the battery 20 on the premise of not increasing the volume of the battery 20. Wherein "at least two" means two or more. Each naked electric core all has a positive pole utmost point ear and a negative pole utmost point ear at least. With the help of the positive pole utmost point ear and the negative pole utmost point ear of these at least two naked electric cores and every naked electric core, can form two at least charge-discharge links. At least two parts of the battery 20 can be charged and discharged simultaneously by means of the at least two charging and discharging links, the impedance of the battery core is small, the charging and discharging speed can be improved, and the thermal safety performance is ensured.

For example, referring to fig. 6 and 7, fig. 6 is a schematic structural diagram of a battery 20 according to still other embodiments of the present application, and fig. 7 is an exploded view of the battery 20 shown in fig. 6. In the present embodiment, the battery 20 includes a cell 21 and a protective plate 22. Wherein, electric core 21 includes the naked electric core 212a of casing 211, first and second and 212 b.

The case 211 encloses an electrolyte. First naked electric core 212a and the naked electric core 212b of second all set up in casing 211 and soak in electrolyte. Naked electric core 212a of first naked electric core and the naked electric core 212b of second can be the naked electric core of coiling formula, also can be the naked electric core of lamination formula. The shape of first naked electric core 212a and the naked electric core 212b of second can be cuboid, square, cylinder or other allotropes.

The first bare cell 212a has two first tabs 213 a. One of the two first tabs 213a is a positive electrode tab and the other is a negative electrode tab. One end of each of the two first tabs 213a is electrically connected to the first bare cell 212a, and the other end of each of the two first tabs passes through the first casing 211a and extends out of the first casing 211 a. The two first tabs 213a form a first charge and discharge port B. Similarly, the second bare cell 212b has two second tabs 213 b. One of the two second tabs 213b is a positive tab and the other is a negative tab. One ends of the two second pole ears 213b are electrically connected to the second bare cell 212b, and the other ends of the two second pole ears extend out of the second case 211b through the second case 211 b. The two second pole pieces 213b form a second charge and discharge port C.

The protection plate 22 has a first charge and discharge circuit and a second charge and discharge circuit. The first charge and discharge circuit and the second charge and discharge circuit are integrated on the protection plate 22, not shown in the figure. The first charge and discharge circuit is electrically connected to the first bare cell 212a via the first charge and discharge port B. In addition, the protection plate 22 further has a third charge and discharge port D. The third charging/discharging port D is located on the first charging/discharging circuit. The protection board 22 is used to be electrically connected to the power management module, the charging management module and the charger through the third charging/discharging port D to form a charging/discharging link. Similarly, the second charge and discharge circuit is electrically connected to the second bare cell 212b via the second charge and discharge port C. On this basis, the protection plate 22 further has a fourth charge and discharge port E, which is located on the second charge and discharge circuit. The protection board 22 is used for being electrically connected with the power management module, the charging management module and the charger through the fourth charging and discharging port E to form another charging and discharging link.

Compared with the battery 20 shown in fig. 3-5, the battery 20 shown in fig. 6 and 7 is added with a bare cell, so that a charge and discharge link is added, multi-path charge and discharge can be realized, the charge efficiency can be improved compared with a single charge and discharge link, and the thermal safety performance is ensured to a certain extent. However, when a bare cell is added, at least two tabs (including a positive tab and a negative tab) are also added. The tab is only used for leading out the electrode of the bare cell and is not used for participating in charge-discharge reaction, so that the volume energy density of the battery 20 is reduced on the premise that the volume of the battery 20 is not changed. From this, it is often difficult to satisfy both the charge/discharge rate and the volumetric energy density of the battery 20.

In order to overcome the technical problem, the first improvement thinking that this application provided is for setting up two at least naked electric cores in the battery to the mass flow body of a kind of pole piece (positive pole piece or negative pole piece) of one of them naked electric core is connected into a whole with the mass flow body electricity of a kind of pole piece (positive pole piece or negative pole piece) of another naked electric core, can adopt a utmost point ear to draw forth the electrode of these two kinds of pole pieces simultaneously from this. In addition, this application still provides the second kind and improves the thinking, and this second kind improves the thinking for set up two at least naked electric cores in the battery to set up extra utmost point ear between two adjacent naked electric cores, this extra utmost point ear is connected with the mass flow body electricity simultaneously of a pole piece (positive pole piece or negative pole piece) of these two naked electric cores. Therefore, the electrode of one pole piece of the two naked electric cores can be led out by one pole lug. These two kinds of design thinking all can reduce the quantity that sets up of utmost point ear when improving battery charge-discharge speed to can compromise the charge-discharge speed and the volume energy density of battery to a certain extent. Moreover, this application still provides the third kind and improves the thinking, and this third kind improves the thinking for set up two at least naked electric cores in the battery, and the mass flow body of a pole piece of every naked electric core extends and forms utmost point ear unit, and the utmost point ear unit of these two at least naked electric cores draws forth the electrode through same switching conductor. According to the three design concepts, the structure of the battery 20 provided by the present application can have the following first embodiment, second embodiment and third embodiment. Specifically, the following first embodiment is based on the above first design concept, the following second embodiment is based on the above second design concept, and the following third embodiment is based on the above third design concept.

Example one

Referring to fig. 8 and 9, fig. 8 is a schematic structural diagram of a battery 20 according to still other embodiments of the present application, and fig. 9 is an exploded view of the battery 20 shown in fig. 8. In the present embodiment, the battery 20 includes a battery cell 21 and a protective plate 22. Wherein, electric core 21 includes the naked electric core 212a of casing 211, first and second and 212 b.

The case 211 encloses an electrolyte (not shown). First naked electric core 212a and the naked electric core 212b of second all set up in casing 211 and soak in electrolyte.

The shape of first naked electric core 212a and the naked electric core 212b of second can be cuboid, square, cylinder or other allotropes. The drawings of this application all are at the explanation of first naked electric core 212a and the naked electric core 212b of second for the basis of cuboid on. On this basis, first naked electric core 212a can range upon range of the setting with the naked electric core 212b of second, also can set up side by side, still can be for other relative position relations.

Naked electric core 212a of first naked electric core and the naked electric core 212b of second can be the naked electric core of coiling formula, also can be the naked electric core of lamination formula. Fig. 8 and 9 only give first naked electric core 212a and the naked electric core 212b of second example for the naked electric core of winding formula. In other embodiments, first bare cell 212a and second bare cell 212b are bare cell of lamination type. In still other embodiments, the bare cell 212a of first bare cell and the bare cell 212b of second can also be one of them for the bare cell of coiling formula, and another is the bare cell of lamination formula.

Referring to fig. 10, fig. 10 is a schematic end view of the first bare cell 212a in the battery 20 shown in fig. 9. The first bare cell 212a is formed by sequentially laminating and winding four layers of a second pole piece P2, a diaphragm S, a first pole piece P1 and a diaphragm S. One of the first pole piece P1 and the second pole piece P2 is a positive pole piece and the other is a negative pole piece. Referring to fig. 11, fig. 11 is a schematic cross-sectional structure view of a portion of the first bare cell 212a shown in fig. 10 along a-a direction. The first pole piece P1 includes a current collector P11 and a polar material P12 disposed on the surface of the current collector P11. The polar material P12 may be disposed on one surface of the current collector P11, or on two opposite surfaces of the current collector P11, and fig. 11 illustrates an example in which the polar material P12 is disposed on one surface of the current collector P11. With reference to fig. 11, the second electrode sheet P2 includes a current collector P21 and a polar material P22 disposed on the surface of the current collector P21. The polar material P22 may be disposed on one surface of the current collector P21, or may be disposed on opposite surfaces of the current collector P21. Fig. 11 illustrates an example in which the polar material P22 is provided on one surface of the current collector P21.

Referring to fig. 10 and 11, the first bare cell 212a further includes a first tab 213 a. The first tab 213a is electrically connected to the current collector P11 of the first pole piece P1, and is used for leading out the electrode of the first pole piece P1 to the outside of the housing 211.

For the first bare cell 212a of different structural forms, the structure of the first tab 213a is also different.

Specifically, when first naked electric core 212a is the naked electric core of coiling formula, some embodiments please refer to fig. 12 and fig. 13, fig. 12 is a schematic diagram of a first pole piece P1 when the expansion state in the first naked electric core 212a shown in fig. 10, and fig. 13 is another schematic diagram of a first pole piece P1 when the expansion state in the first naked electric core 212a shown in fig. 10. In the embodiment shown in fig. 12 and 13, the first tab 213a is independent from the first pole piece P1, and the first tab 213a is fixed on the current collector P11 of the first pole piece P1 by pressing, welding, or the like. The embodiment shown in fig. 12 differs from the embodiment shown in fig. 13 in that: in fig. 12, an orthographic projection of one end of the first tab 213a on the first pole piece P1 is located outside the first pole piece P1, and the volume of the first tab 213a is smaller, so that the occupied space in the battery 20 is smaller, which is beneficial to improving the volumetric energy density of the battery 20; in fig. 13, the orthographic projection of the two ends of the first tab 213a on the first pole piece P1 is located outside the first pole piece P1, so that the first tab 213a can be connected with more charge and discharge links to increase the charge and discharge speed of the battery 20. The specific first tab 213a may be selected to have one end extending out of the edge of the first pole piece P1 or two ends extending out of the edge of the first pole piece P1 according to the actual volumetric energy density or the charge-discharge speed requirement.

In other embodiments, referring to fig. 14, fig. 14 is another structural schematic diagram of the first pole piece P1 in the first bare cell 212a shown in fig. 10 in the unfolded state. In the present embodiment, the current collector P11 of the first pole piece P1 is disposed to overlap with the polar material P12 of the first pole piece P1, and the current collector P11 of the first pole piece P1 is completely shielded by the polar material P12 of the first pole piece P1, so the current collector P11 of the first pole piece P1 is not shown in fig. 14. On this basis, the first tab 213a includes a tab unit 213a1 formed by directly extending the current collector P11 of the first pole piece P1. That is, the tab unit 213a1 is integral with the current collector P11 of the first pole piece P1. In this regard, the first tab 213a further includes a transfer conductor (not shown) electrically connected to the tab unit 213a1, and the structural strength of the transfer conductor may be greater than that of the tab unit 213a1, so that the first tab 213a is connected to the protective plate 22 through the transfer conductor, and the reliability is better.

It should be noted that fig. 12 to 14 only show an example that the first tab 213a is a single structure when the first bare cell 212a is a winding bare cell, and the structure of the first tab 213a is not limited thereto. In other embodiments, when the first bare cell 212a is a wound bare cell, the first tab 213a may further include a plurality of tab units, and the plurality of tab units are disposed on the current collector P11 of the first pole piece P1 at intervals. When the first pole piece P1, the diaphragm S and the second pole piece P2 are stacked and wound into a bare cell, the plurality of tab units are stacked to conveniently form the first tab 213 a. The plurality of tab units may be fixed on the current collector P11 of the first pole piece P1 by welding, pressing, or the like, or may be formed by directly extending the current collector P11, which is not limited herein.

For example, please refer to fig. 15, fig. 15 is a schematic view of a connection structure between a first pole piece P1 in a first bare cell 212a and a first tab 213a in an expanded state according to yet another embodiment of the present disclosure. The first tab 213a includes a plurality of tab units 213a 1. The plurality of tab units 213a1 are fixed on the current collector P11 of the first pole piece P1 at intervals by welding, pressing and other processes. The plurality of tab units 213a1 may extend from one end of the first pole piece P1, or may extend from both ends of the first pole piece P1, and fig. 15 only shows an example in which one end of the plurality of tab units 213a1 extends from the first pole piece P1. Referring to fig. 16, when the first pole piece P1, the diaphragm S, and the second pole piece P2 are stacked and wound into a bare cell, fig. 16 is a schematic structural diagram of the first pole piece P1, the diaphragm S, and the second pole piece P2 shown in fig. 15 after being stacked and wound into the first bare cell 212 a. In the present embodiment, a plurality of tab units 213a1 are stacked to be fixed together by welding, press-fitting, etc. to form the first tab 213 a.

For another example, referring to fig. 17, fig. 17 is a schematic view of a connection structure between a first pole piece P1 in a first bare cell 212a and a first tab 213a in an expanded state according to still another embodiment of the present disclosure. In the present embodiment, the current collector P11 of the first pole piece P1 is overlapped with the polar material P12 of the first pole piece P1, and the current collector P11 of the first pole piece P1 is completely shielded by the polar material P12 of the first pole piece P1, so the current collector P11 of the first pole piece P1 is not shown in fig. 14. On the basis of this, the first tab 213a includes a plurality of tab units 213a1 and a transfer conductor (not shown). The plurality of tab units 213a1 are formed by directly extending the current collector P11 of the first pole piece P1. That is, the tab units 213a1 and the current collector P11 of the first pole piece P1 are integrated into a single structural component. When the first pole piece P1 is stacked with the separator S and the second pole piece P2 and wound to form the first bare cell 212a, the plurality of tab units 213a1 are stacked and electrically connected to the via conductor to form the first tab 213 a.

When first naked electric core 212a is the naked electric core of lamination formula, please refer to fig. 18 and fig. 19 in some embodiments, fig. 18 is the structure sketch of first naked electric core 212a that this application still some embodiments provided, and fig. 19 is a cross-sectional structure sketch of first naked electric core 212a in b-b line department that fig. 18 shows. In this embodiment, the first bare cell 212a is a laminated bare cell. The first bare cell 212a includes a first pole piece P1 and a second pole piece P2 that are alternately arranged and stacked together in sequence, and a diaphragm S is disposed between the adjacent first pole piece P1 and second pole piece P2. The first pole piece P1 includes a current collector P11 and a polar material P12. The polar material P12 may be disposed on one surface of the current collector P11, or may be disposed on two opposite surfaces of the current collector P11. Fig. 19 shows only an example in which the polar material P12 is provided on one surface of the current collector P11. The second pole piece P2 includes a current collector P21 and a polar material P22. The polar material P22 may be disposed on one surface of the current collector P21, or may be disposed on opposite surfaces of the current collector P21. Fig. 19 shows only an example in which the polar material P22 is provided on one surface of the current collector P21, and this is not to be construed as a particular limitation to the constitution of the present application. On the basis of this, the first tab 213a is used to draw the current of the first pole piece P1. Specifically, the first tab 213a includes a plurality of tab units 213a 1. The tab units 213a1 are electrically connected to the current collectors P11 of the first pole pieces P1 of the first bare cell 212a, respectively, or are formed by extending the current collectors P11 of the first pole pieces P1 directly. In the embodiment shown in fig. 19, the tab units 213a1 are independent from the first pole pieces P1, and the tab units 213a1 are electrically connected to the current collectors P11 of the first pole pieces P1 by welding, pressing, and the like. In other embodiments, referring to fig. 20, fig. 20 is a schematic cross-sectional view of the first bare cell 212a shown in fig. 18 at a line b-b. In the present embodiment, the plurality of tab units 213a1 are respectively formed by directly extending the current collectors P11 of the plurality of first pole pieces P1. In addition to the embodiment shown in fig. 20, the first tab 213a further includes a transfer conductor, and a plurality of tab units 213a1 are stacked and electrically connected together with the transfer conductor to form the first tab 213 a.

Referring to fig. 21, fig. 21 is a schematic end view of the second bare cell 212b in the battery 20 shown in fig. 9. The second bare cell 212b is formed by laminating and winding a fourth pole piece P4, a diaphragm S, a third pole piece P3 and a diaphragm S. One of the third pole piece P3 and the fourth pole piece P4 is a positive pole piece and the other is a negative pole piece. Referring to fig. 22, fig. 22 is a schematic cross-sectional structure view of a portion of the second bare cell 212b shown in fig. 21 along the c-c direction. The third electrode P3 includes a current collector P31 and a polar material P32 disposed on the surface of the current collector P31. The polar material P32 may be disposed on one surface of the current collector P31, or on two opposite surfaces of the current collector P31, and fig. 22 illustrates an example in which the polar material P32 is disposed on one surface of the current collector P31. With reference to fig. 22, the fourth electrode P4 includes a current collector P41 and a polar material P42 disposed on the surface of the current collector P41. The polar material P42 may be disposed on one surface of the current collector P41, or may be disposed on two opposite surfaces of the current collector P41. Fig. 22 is a description of an example in which the polar material P42 is disposed on one surface of the current collector P41.

Referring to fig. 21 and 22, the second bare cell 212b further includes a second tab 213 b. The second tab 213b is electrically connected to the current collector P31 of the third pole piece P3, and is used for leading out the electrode of the third pole piece P3 to the outside of the casing 211.

For the second bare cell 212b of a different structural style, the structure of the second tab 213b is also different. Specifically, under the second bare cell 212b with different structural forms, the structural design of the second tab 213b may refer to the structural implementation of the first tab 213a under the first bare cell 212a with different structural forms, which is not repeated herein.

Combine the naked electric core 212b of first naked electric core 212a and second, first naked electric core 212a in the current collector P21 of second pole piece P2 and the current collector P41 of fourth pole piece P4 in the naked electric core 212b of second be connected into a whole. Specifically, the current collector P21 of the second pole piece P2 in the first bare cell 212a and the current collector P41 of the fourth pole piece P4 in the second bare cell 212b may be electrically connected to form a whole through contact conduction, welding, or integral molding. Like this, the occupation space at the electric connection position between first naked electric core 212a and the naked electric core 212b of second is less, is favorable to improving battery 20's volume energy density.

For example, please refer to fig. 23 and fig. 24, where fig. 23 is a schematic diagram of a connection structure between the first bare cell 212a shown in fig. 10 and the second bare cell 212b shown in fig. 21, and fig. 24 is a schematic diagram of a cross-sectional structure of the structure shown in fig. 23 at a d-d line. In this embodiment, the current collector P21 of the second pole piece P2 in the first bare cell 212a and the current collector P41 of the fourth pole piece P4 in the second bare cell 212b are electrically connected into a whole in a contact and electrical conduction manner. In order to ensure the contact stability of the current collector P21 of the second pole piece P2 in the first bare cell 212a and the current collector P41 of the fourth pole piece P4 in the second bare cell 212b, the contact positions of the current collector P21 of the second pole piece P2 and the current collector P41 of the fourth pole piece P4 can be pressed into a whole in a pressing mode, and the first bare cell 212a and the second bare cell 212b can also be fixed together by adopting tab glue.

For another example, please refer to fig. 25, fig. 25 is a schematic diagram of another connection structure between the first bare cell 212a shown in fig. 10 and the second bare cell 212b shown in fig. 21. In this embodiment, the current collector of the second pole piece P2 in the first bare cell 212a and the current collector of the fourth pole piece P4 in the second bare cell 212b are electrically connected into a whole in a welding manner, and the welding point formed by welding is marked as 215.

For another example, please refer to fig. 26, and fig. 26 is a schematic diagram of another connection structure between the first bare cell 212a shown in fig. 10 and the second bare cell 212b shown in fig. 21. In this embodiment, the current collector of the second pole piece P2 in the first bare cell 212a and the current collector of the fourth pole piece P4 in the second bare cell 212b are electrically connected into a whole in an integrated manner. That is, the current collector of the second pole piece P2 and the current collector of the fourth pole piece P4 are integrated into a structural member.

On this basis, the battery 20 further includes a third tab 214. The third tab 214 is electrically connected to the whole body (i.e. the whole body formed by electrically connecting the current collector of the second pole piece P2 and the current collector of the fourth pole piece P4) to simultaneously lead out the electrodes of the second pole piece P2 and the fourth pole piece P4. Specifically, the third tab 214 may be electrically connected to the partial current collector belonging to the second pole piece P2 in the whole body, or may be electrically connected to the partial current collector belonging to the fourth pole piece P4 in the whole body. The third tab 214 may also be located between the second pole piece P2 and the fourth pole piece P3. In addition, the third tab 214 is electrically connected to both the partial current collector belonging to the second pole piece P2 and the partial current collector belonging to the fourth pole piece P4.

Fig. 23, 25 and 26 give examples of the portion of the current collector belonging to the second pole piece P2 to which the third tab 214 is electrically connected in the whole. Based on this example, optionally, the third tab 214 may be electrically connected to the current collector of the second pole piece P2 by welding, pressing, or the like, or may be formed by directly extending the current collector of the second pole piece P2. And is not particularly limited herein. Specifically, the third tab 214 may be electrically connected to a portion of the second pole piece P2 near the fourth pole piece P4. Thus, the distance from the third pole piece 214 to each part of the fourth pole piece P4 can be shortened, so that the impedance can be reduced to a certain extent, and the charging and discharging speed can be increased.

In still other embodiments, a third tab 214 is electrically connected to the portion of the current collector belonging to the fourth pole piece P4 in the whole. Based on this embodiment, optionally, the third tab 214 may be electrically connected to the current collector of the fourth pole piece P4 by welding, pressing, or the like, or may be formed by directly extending the current collector of the fourth pole piece P4. And is not particularly limited herein. Specifically, the third tab 214 may be electrically connected to a portion of the fourth pole piece P4 near the second pole piece P2. Thus, the distance from the third pole piece 214 to each part of the second pole piece P2 can be shortened, so that the impedance can be reduced to a certain extent, and the charging and discharging speed can be increased.

In still other embodiments, please refer to fig. 27 and 28, fig. 27 is a schematic diagram of a connection structure of a first bare cell 212a and a second bare cell 212b according to still other embodiments of the present application, and fig. 28 is a schematic diagram of a cross-sectional structure of the structure shown in fig. 27 at the line e-e. In the present embodiment, the third tab 214 is located between the second tab P2 and the fourth tab P3, and the third tab 214 is electrically connected to both the partial current collector belonging to the second tab P2 and the partial current collector belonging to the fourth tab P4 in the whole. Optionally, the third tab 214 may be electrically connected to the partial current collector belonging to the second pole piece P2 and the partial current collector belonging to the fourth pole piece P4 in the whole body by welding, pressing, or the like.

One ends of the first tab 213a, the second tab 213b and the third tab 214 protrude out of the case 211 through the case 211.

Thus, the first tab 213a and the third tab 214 of the battery 20 form a first charge/discharge port B, and the second tab 213B and the third tab 214 of the battery 20 form a second charge/discharge port C. At least two charge and discharge links may be formed by the first charge and discharge port B and the second charge and discharge port C, so that the charge and discharge speed of the battery 20 may be increased. Meanwhile, since the first charge/discharge port B and the second charge/discharge port C share the third tab 214, the number of tabs in the battery 20 may be reduced to ensure the volumetric energy density of the battery 20. Thereby, the charge and discharge speed and the volumetric energy density of the battery 20 are both considered to some extent. Meanwhile, the number of the tabs in the battery 20 is small, so that the width of a single tab (including the first tab 213a, the second tab 213b and the third tab 214) can be widened on the premise that the size of the battery 20 is fixed, so as to further improve the charging capability and optimize the heat dissipation effect.

In the above embodiment, the number of the third lugs 214 may be one or more. Fig. 23-28 only give an example where the number of third lugs 214 is one. As the number of the third tabs 214 increases, the number of the charge and discharge links formed by the battery 20 increases, and the charge and discharge speed of the battery 20 increases. However, as the number of third tabs 214 increases, the volume occupied by the inner tabs of the battery 20 increases, and the volumetric energy density of the battery 20 decreases on the premise that the volume of the battery 20 is constant. The number of third tabs 214 can therefore be designed in conjunction with the requirements of charge and discharge speed and volumetric energy density in a particular scenario.

When the number of the third tabs 214 is plural, all of the plural third tabs 214 may be disposed on the partial current collector belonging to the second pole P2 in the whole, all of the plural third tabs 214 may be disposed on the partial current collector belonging to the fourth pole P4 in the whole, a part of the third tabs 214 may be disposed on the partial current collector belonging to the second pole P2 in the whole, and another part of the third tabs 214 may be disposed on the partial current collector belonging to the fourth pole P4 in the whole.

For example, referring to fig. 29, fig. 29 is a schematic view of a connection structure between a first bare cell 212a and a second bare cell 212b according to still other embodiments of the present disclosure. In the present embodiment, the number of the third tabs 214 is two, and two third tabs 214 are electrically connected to the part of the current collector belonging to the second pole P2 in the whole. The two third tabs 214 and the first tab 213a form a first charge/discharge port B, so that two first charge/discharge ports B are obtained. The two third tabs 214 and the second tab 213b form a second charge/discharge port C, so that two second charge/discharge ports C are obtained. Four charge and discharge links can be formed, so that the charge and discharge speed of the battery 20 can be improved to a certain extent.

What need explain is, the connection structure form of above-mentioned first naked electric core 212a and the naked electric core 212b of second only explains that going on for the basis of the naked electric core of coiling formula at first naked electric core 212a and the naked electric core 212b of second. Of course, the first bare cell 212a and the second bare cell 212b may also be laminated bare cells. Based on this, first naked electric core 212a includes a plurality of second pole pieces P2, and second naked electric core 212b includes a plurality of fourth pole pieces P4. The mass collector P21 of second pole piece P2 in the first naked electric core 212a and the mass collector P41 of fourth pole piece P4 in the second naked electric core 212b are connected into a whole, mean: the current collector P21 of at least one second pole piece P2 in the first bare cell 212a is electrically connected with the current collector P41 of at least one fourth pole piece P4 in the second bare cell 212b into a whole.

Specifically, the current collector P21 of at least one second pole piece P2 in the first bare cell 212a and the current collector P41 of at least one fourth pole piece P4 in the second bare cell 212b are electrically connected into a whole, including: the current collector P21 of one second pole piece P2 in the first bare cell 212a and the current collector P41 of one fourth pole piece P4 in the second bare cell 212b are electrically connected into a whole; the current collector P21 of one second pole piece P2 in the first bare cell 212a is electrically connected with the current collector P41 of a plurality of fourth pole pieces P4 in the second bare cell 212b to form a whole; the current collectors P21 of the second pole pieces P2 in the first bare cell 212a and the current collector P41 of the fourth pole piece P4 in the second bare cell 212b are electrically connected into a whole; the current collectors P21 of the second pole pieces P2 in the first bare cell 212a and the current collectors P41 of the fourth pole pieces P4 in the second bare cell 212b are electrically connected into a whole respectively; four layers.

For example, please refer to fig. 30, where fig. 30 is a schematic diagram of a connection structure between a first bare cell 212a and a second bare cell 212b according to some further embodiments of the present disclosure. In this embodiment, first naked electric core 212a and the naked electric core 212b of second are the naked electric core of lamination formula. First naked electric core 212a and the range upon range of setting of the naked electric core 212b of second. The surface of the first bare cell 212a near the second bare cell 212b is formed by the current collector of the second pole piece P2. The surface of the second bare cell 212b close to the first bare cell 212a is formed by the current collector of the fourth pole piece P4. The current collector of this second pole piece P2 of first naked battery cell 212a and this fourth pole piece P4 of second naked battery cell 212b electrically connect into a whole. Specifically, the current collector of the second pole piece P2 and the current collector of the fourth pole piece P4 can be electrically connected into a whole by means of contact electrical conduction, welding, integral molding and the like. On this basis, the third tab 214 is electrically connected to the whole. Specifically, the third tab 214 may be electrically connected to a partial current collector belonging to the second electrode P2 in the whole, may be electrically connected to a partial current collector belonging to the fourth electrode P4 in the whole, may be located between the second electrode P2 and the fourth electrode P4, and may be electrically connected to both a partial current collector belonging to the second electrode P2 in the whole and a partial current collector belonging to the fourth electrode P4 in the whole.

In the above embodiment, when the third tab 214 is electrically connected to the partial current collector belonging to the second pole piece P2 or the partial current collector belonging to the fourth pole piece P4 in the whole, specifically, the third tab 214 may be electrically connected to the partial current collector belonging to the second pole piece P2 or the partial current collector belonging to the fourth pole piece P4 in the whole by welding, pressing, or the like, or may be formed by directly extending the partial current collector belonging to the second pole piece P2 or the partial current collector belonging to the fourth pole piece P4 in the whole. Fig. 30 gives only an example in which the third tab 214 is formed by direct extension of part of the current collector belonging to the fourth pole piece P4 in its entirety. In other examples, please refer to fig. 31, where fig. 31 is a schematic diagram of a connection structure of a first bare cell 212a and a second bare cell 212b according to still other embodiments of the present application. Compared with the embodiment shown in fig. 30, the present embodiment is different in that: in this embodiment, the third tab 214 is located between the partial current collector belonging to the second tab P2 and the partial current collector belonging to the fourth tab P4 in the whole. And the third tab 214 is electrically connected to the current collector belonging to the second tab P2 and the current collector belonging to the fourth tab P4 by welding, pressing, etc.

For another example, please refer to fig. 32 and 33, fig. 32 is a schematic diagram of a connection structure of a first bare cell 212a and a second bare cell 212b according to some further embodiments of the present application, and fig. 33 is a schematic diagram of the connection structure shown in fig. 32 when viewed from a direction a. In this embodiment, first naked electric core 212a and the naked electric core 212b of second are the naked electric core of lamination formula. First naked electric core 212a sets up side by side with the naked electric core 212b of second. The quantity of the second pole piece P2 of first naked electric core 212a equals with the quantity of the fourth pole piece P4 of the naked electric core 212b of second, and the second pole piece P2 of first naked electric core 212a and the fourth pole piece P4 one-to-one of the naked electric core 212b of second, every second pole piece P2's current collector all with the current collector electricity of the fourth pole piece P4 who corresponds and connect into a whole. Specifically, the current collector of each second pole piece P2 and the current collector of the corresponding fourth pole piece P4 are electrically connected into a whole by direct contact and electric conduction, welding, integral molding and the like. In the embodiment shown in fig. 32, the current collector of each second pole piece P2 is integrally and electrically connected with the current collector of the corresponding fourth pole piece P4.

Based on this, please continue to refer to fig. 33, the third tab 214 includes a plurality of tab units 214 a. The plurality of tab units 214a are electrically connected to the plurality of entirety, respectively. Specifically, the plurality of tab units 214a may be electrically connected to the portion of the first bare cell 212a in the plurality of integers, or electrically connected to the portion of the second bare cell 212b in the plurality of integers, or electrically connected to the other portion of the second bare cell 212b in the plurality of integers, which is not specifically limited herein. The plurality of tab units 214a may be electrically connected to the plurality of bodies by welding, pressing, or the like, or may be directly formed by extending the plurality of bodies, that is, the plurality of tab units 214a are respectively integrally formed with the plurality of bodies. When the plurality of tab units 214a are directly extended from the plurality of integral bodies, the third tab 214 further includes a transfer conductor (not shown), and the plurality of tab units 214a are stacked and electrically connected together with the transfer conductor.

Example two

Referring to fig. 34 and 35, fig. 34 is a schematic structural diagram of a battery 20 according to still other embodiments of the present application, and fig. 35 is an exploded view of the battery 20 shown in fig. 34. In the present embodiment, the battery 20 includes a battery cell 21 and a protective plate 22. Wherein, electric core 21 includes the naked electric core 212a of casing 211, first and second and 212 b.

Naked electric core 212a of first naked electric core and the naked electric core 212b of second can be the naked electric core of coiling formula, also can be the naked electric core of lamination formula. Fig. 35 only gives the example that first naked electric core 212a and the naked electric core 212b of second are the naked electric core of coiling formula. In other embodiments, first bare cell 212a and second bare cell 212b are bare cell of lamination type. In still other embodiments, the bare cell 212a of first bare cell and the bare cell 212b of second can also be one of them for the bare cell of coiling formula, and another is the bare cell of lamination formula.

Referring to fig. 36, fig. 36 is a schematic end view of the first bare cell 212a in the battery 20 shown in fig. 35. The first bare cell 212a includes a first pole piece P1, a second pole piece P2, and a diaphragm S for insulating and isolating the first pole piece P1 and the second pole piece P2. One of the first pole piece P1 and the second pole piece P2 is a positive pole piece and the other is a negative pole piece. On this basis, first naked electric core 212a still includes first utmost point ear 213 a. The first tab 213a is electrically connected to the current collector of the first pole piece P1, and is used for leading out the electrode of the first pole piece P1 to the outside of the case 211.

For the first bare cell 212a of different structural forms, the structure of the first tab 213a is also different. Specifically, in this embodiment, under the first bare cell 212a with different structural forms, the structural design of the first tab 213a may be implemented by referring to the structure of the first tab 213a under the first bare cell 212a with different structural forms in the first embodiment, which is not described herein again.

Referring to fig. 37, fig. 37 is a schematic end view of the second bare cell 212b in the battery 20 shown in fig. 35. The second bare cell 212b includes a third pole piece P3, a fourth pole piece P4, and a diaphragm S for insulating and isolating the third pole piece P3 and the fourth pole piece P4. One of the third pole piece P3 and the fourth pole piece P4 is a positive pole piece and the other is a negative pole piece. On this basis, naked electric core 212b of second still includes second utmost point ear 213 b. The second tab 213b is electrically connected to the current collector of the third pole P3, and is used for leading out the electrode of the third pole P3 to the outside of the casing 211.

For the second bare cell 212b of a different structural style, the structure of the second tab 213b is also different. Specifically, in this embodiment, under the second bare cell 212b with different structural forms, the structural design of the second tab 213b may also be implemented by referring to the structure of the first tab 213a under the first bare cell 212a with different structural forms in the first embodiment, which is not described herein again.

On this basis, referring back to fig. 35, the battery 20 further includes a third tab 214. The third tab 214 is disposed between the current collector of the second tab P2 in the first bare cell 212a and the current collector of the fourth tab P4 in the second bare cell 212 b. The third tab 214 is electrically connected to the current collector of the second electrode P2, and the third tab 214 is also electrically connected to the current collector of the fourth electrode P4. That is, the current collector of the second pole piece P2 in the first bare cell 212a is electrically connected to the current collector of the fourth pole piece P4 in the second bare cell 212b via the third pole piece 214. The third tab 214 can simultaneously extract the electrodes of the second pole piece P2 and the fourth pole piece P4.

Specifically, referring to fig. 38, fig. 38 is a schematic diagram of a connection structure between the third tab 214 in fig. 35 and the first bare cell 212a shown in fig. 36 and the second bare cell 212b shown in fig. 37. In this embodiment, the surface of the first bare cell 212a close to the second bare cell 212b is formed by the current collector of the second pole piece P2. The surface of the second bare cell 212b close to the first bare cell 212a is formed by the current collector of the fourth pole piece P4. Third tab 214 is disposed between first bare cell 212a and second bare cell 212b, and third tab 214 is electrically connected to the current collector of the second tab P2 of first bare cell 212a through contact, welding, and pressing, and third tab 214 is also electrically connected to the current collector of the fourth tab P4 of second bare cell 212b through contact, welding, and pressing.

The connection structure shown in fig. 38 is similar to that shown in fig. 27, except that: in the connection structure shown in fig. 38, the current collector of the second pole piece P2 in the first bare cell 212a is electrically conducted with the current collector of the fourth pole piece P4 in the second bare cell 212b only through the third pole piece 214; and in the connection structure shown in fig. 27, the current collector of the second pole piece P2 in the first bare cell 212a is not only electrically conducted with the current collector of the fourth pole piece P4 in the second bare cell 212b via the third pole piece 214, but also electrically conducted with the current collector of the fourth pole piece P4 in the second bare cell 212b in a manner of direct contact, welding, integral molding, etc.

In the above embodiment, the number of the third lugs 214 may be one or more. Fig. 35 and 38 give only an example in which the number of the third lugs 214 is one. As the number of the third lugs 214 increases, the number of the charge and discharge links formed by the battery 20 increases, and the charge and discharge speed of the battery 20 increases. However, as the number of third tabs 214 increases, the volume occupied by the inner tabs of the battery 20 increases, and the volumetric energy density of the battery 20 decreases on the premise that the volume of the battery 20 is constant. The number of third tabs 214 can therefore be designed in conjunction with the requirements of charge and discharge speed and volumetric energy density in a particular scenario.

For example, referring to fig. 39, fig. 39 is a schematic structural diagram of a first bare cell 212a, a second bare cell 212b, and a third tab 214 according to still other embodiments of the present application. In this embodiment, the number of the third tabs 214 is two, two third tabs 214 are both disposed between the first bare cell 212a and the second bare cell 212b, and two third tabs 214 are both electrically connected to the current collector of the second pole P2 of the first bare cell 212a, and two third tabs 214 are also electrically connected to the current collector of the fourth pole P4 of the second bare cell 212 b. The two third tabs 214 and the first tab 213a form a first charge/discharge port B, so that two first charge/discharge ports B are obtained. The two third tabs 214 and the second tab 213b form a second charge/discharge port C, so that two second charge/discharge ports C are obtained. Four charge and discharge links can be formed, so that the charge and discharge speed of the battery 20 can be improved to a certain extent.

What need explain is, the connection structure form of above-mentioned first naked electric core 212a and the naked electric core 212b of second only explains that going on for the basis of the naked electric core of coiling formula at first naked electric core 212a and the naked electric core 212b of second. Of course, the first bare cell 212a and the second bare cell 212b may also be laminated bare cells.

For example, please refer to fig. 40, where fig. 40 is a schematic structural diagram of a first bare cell 212a, a second bare cell 212b, and a third tab 214 according to some further embodiments of the present disclosure. In this embodiment, first naked electric core 212a and the naked electric core 212b of second are the naked electric core of lamination formula. First naked electric core 212a and the range upon range of setting of the naked electric core 212b of second. The surface of the first bare cell 212a near the second bare cell 212b is formed by the current collector of the second pole piece P2. The surface of the second bare cell 212b close to the first bare cell 212a is formed by the current collector of the fourth pole piece P4. Third tab 214 is disposed between first bare cell 212a and second bare cell 212b, and third tab 214 is electrically connected to the current collector of the second tab P2 of first bare cell 212a through contact, welding, and pressing, and third tab 214 is also electrically connected to the current collector of the fourth tab P4 of second bare cell 212b through contact, welding, and pressing.

The connection structure shown in fig. 40 is similar to that shown in fig. 31, except that: in the connection structure shown in fig. 40, the current collector of the second pole piece P2 of the first bare cell 212a is electrically conducted with the current collector of the fourth pole piece P4 of the second bare cell 212b only through the third pole piece 214; and in the connection structure shown in fig. 31, the current collector of the second pole piece P2 of the first bare cell 212a is electrically conducted with the current collector of the fourth pole piece P4 of the second bare cell 212b through the third pole piece 214, and is also electrically conducted with the current collector of the fourth pole piece P4 of the second bare cell 212b through contact, welding, or integral molding.

EXAMPLE III

Referring to fig. 41 and 42, fig. 41 is a schematic structural diagram of a battery 20 according to still other embodiments of the present application, and fig. 42 is an exploded view of the battery 20 shown in fig. 41. In the present embodiment, the battery 20 includes a battery cell 21 and a protective plate 22. Wherein, electric core 21 includes the naked electric core 212a of casing 211, first and second and 212 b.

Naked electric core 212a of first naked electric core and the naked electric core 212b of second can be the naked electric core of coiling formula, also can be the naked electric core of lamination formula. Fig. 42 only shows an example in which the first bare cell 212a and the second bare cell 212b are laminated bare cells. In other embodiments, first naked electric core 212a and the naked electric core 212b of second are the naked electric core of coiling formula. In still other embodiments, the bare cell 212a of first bare cell and the bare cell 212b of second can also be one of them for the bare cell of coiling formula, and another is the bare cell of lamination formula.

Referring to fig. 43 and 44, fig. 43 is a schematic diagram of a connection structure of a first bare cell 212a and a second bare cell 212b in the battery 20 shown in fig. 42, and fig. 44 is a schematic diagram of a cross-sectional structure of the structure shown in fig. 43 at a line f-f. The first bare cell 212a includes a first pole piece P1, a second pole piece P2, and a diaphragm S for insulating and isolating the first pole piece P1 and the second pole piece P2. One of the first and second pole pieces P1 and P2 is a positive pole piece and the other is a negative pole piece. On this basis, first naked electric core 212a still includes first utmost point ear 213 a. The first tab 213a is electrically connected to the current collector of the first pole piece P1, and is used for leading out the electrode of the first pole piece P1 to the outside of the case 211.

The first tab 213a may be independent from the current collector of the first electrode sheet P1, and is electrically connected to the current collector by welding, pressing, or the like. The first tab 213a may further include a tab unit 213a1 formed by a direct extension of the current collector of the first pole piece P1. When the first tab 213a includes a tab unit 213a1 formed by directly extending the current collector of the first pole piece P1, the first tab 213a further includes an adaptor conductor electrically connected to the tab unit 213a1, so as to improve the structural strength of the lead-out portion of the first tab 213a, and facilitate electrical connection with a protection plate.

Referring to fig. 45, fig. 45 is a schematic cross-sectional view of the structure shown in fig. 43 taken along line g-g. The second bare cell 212b includes a third pole piece P3, a fourth pole piece P4, and a diaphragm S for insulating and isolating the third pole piece P3 and the fourth pole piece P4. One of the third pole piece P3 and the fourth pole piece P4 is a positive pole piece and the other is a negative pole piece. On this basis, naked electric core 212b of second still includes second utmost point ear 213 b. A second tab 213b is electrically connected to the current collector of the third tab P3 for leading out the electrode of the third tab P3 to the outside of the case 211.

The second tab 213b may be independent from the current collector of the third tab P3, and may be electrically connected to the current collector by welding, pressing, etc. The second tab 213b may further include a tab unit 213b1 formed by a direct extension of the current collector of the third tab P3. When the second tab 213b includes a tab unit 213b1 formed by directly extending the current collector of the third tab P3, the second tab 213b further includes an adapting conductor electrically connected to the tab unit 213b1 to improve the structural strength of the lead-out portion of the second tab 213b for electrical connection with the protection plate.

On the basis, please refer to fig. 43 and 46a, fig. 46a is a schematic cross-sectional view of the structure shown in fig. 43 at the line h-h. The battery 20 also includes a third tab 214. The third tab 214 includes a plurality of tab units 214a and a transit conductor 214 b. The plurality of tab units 214a are respectively formed by directly extending the current collector P21 of the second pole piece P2 and the current collector P41 of the fourth pole piece P4. The relay conductor 214b and the plurality of tab units 214a are electrically connected together by welding, press-fitting, or the like. In some embodiments, a plurality of tab units 214a may be stacked to facilitate electrical connection with the patch conductors 214 b.

On this basis, optionally, switching conductor 214b can also stretch into between first naked electric core 212a and the naked electric core 212b of second. Referring to FIG. 46b, FIG. 46b is a schematic cross-sectional view of the structure shown in FIG. 43 taken along line h-h. Assume that the portion of the transition conductor 214b extending between the first bare cell 212a and the second bare cell 212b is the first portion. The surface of the naked cell 212b of second that is close to of first naked cell 212a is formed by the current collector P21 of second pole piece P2, and the surface of the naked cell 212b of second that is close to of first naked cell 212a is formed by the current collector P41 of fourth pole piece P4. The first portion is electrically connected to the current collector P21 of the second pole piece P2, and the first portion is electrically connected to the current collector P41 of the fourth pole piece P4. Like this, between switching conductor 214b and the first naked electric core 212a to and the area of contact between switching conductor 214b and the naked electric core 212b of second is great, can reduce impedance, increases charge-discharge speed.

One end of the first tab 213a, the second tab 213b, and the transition conductor 214b extends through the housing 211 to the outside of the housing 211.

Thus, the first tab 213a and the third tab 214 of the battery 20 form a first charge/discharge port B, and the second tab 213B and the third tab 214 of the battery 20 form a second charge/discharge port C. At least two charge and discharge links may be formed by the first charge and discharge port B and the second charge and discharge port C, so that the charge and discharge speed of the battery 20 may be increased. Meanwhile, the tab unit 214a formed by extending the current collector P21 of the second pole piece P2 and the tab unit 214a formed by extending the current collector P41 of the fourth pole piece P4 share the transfer conductor 214b, so that the occupied volume of the tab in the battery 20 can be reduced, and the volumetric energy density of the battery 20 can be ensured. Therefore, the charging and discharging speed and the volume energy density of the battery are considered simultaneously to a certain extent. Meanwhile, the number of the tabs in the battery is small, so that the width of a single tab (including the first tab 213a, the second tab 213b and the third tab 214) can be widened on the premise that the size of the battery is fixed, so that the charging capacity is further improved, and the heat dissipation effect is optimized.

Because compare in the naked electric core of coiling formula, the naked electric core of lamination formula does not receive inner structure's restriction, and the position that sets up of utmost point ear can set up in a flexible way. Fig. 43 only shows an example in which the first tab 213a, the second tab 213b, and the third tab 214 are disposed on the same side of the composite cell composed of the first bare cell 212a and the second bare cell 212 b.

In other examples, please refer to fig. 47, where fig. 47 is a schematic diagram of a connection structure of a first bare cell 212a and a second bare cell 212b in a battery 20 according to still other embodiments of the present disclosure. In this embodiment, the first tab 213a and the second tab 213b are disposed on a side surface of the composite battery cell composed of the first bare cell 212a and the second bare cell 212b, and the third tab 214 is disposed on a side surface adjacent to the side surface in the composite battery cell.

In other embodiments, please refer to fig. 48, where fig. 48 is a schematic diagram of a connection structure of a first bare cell 212a and a second bare cell 212b in a battery 20 according to still other embodiments of the present disclosure. In this embodiment, the first tab 213a and the second tab 213b are disposed on a side surface of the composite battery cell formed by the first bare cell 212a and the second bare cell 212b, and the third tab 214 is disposed on a side surface opposite to the side surface in the composite battery cell.

In the above embodiment, the number of the third lugs 214 may be one or more. Fig. 43-48 only give an example where the number of third lugs 214 is one. When the number of the third tabs 214 is plural, the number of the charge and discharge links formed by the battery 20 is large, and the charge and discharge speed of the battery 20 is further increased. However, as the number of third tabs 214 increases, the volume occupied by the inner tabs of the battery 20 increases, and the volumetric energy density of the battery 20 decreases on the premise that the volume of the battery 20 is constant. The number of third tabs 214 can therefore be designed in conjunction with the requirements of charge and discharge speed and volumetric energy density in a particular scenario. When the number of the third tabs 214 is plural, the plural third tabs 214 may be disposed on the same side, two adjacent sides, two opposite sides, or three or four sides of the composite bare cell, which is not limited herein.

What need to explain is, the connection structure form of the naked electric core 212a of above-mentioned first and the naked electric core 212b of second only is the explanation of going on for the naked electric core's of lamination formula basis at the naked electric core 212a of first naked electric core and second. Of course, the first bare cell 212a and the second bare cell 212b may also be winding bare cells.

For example, please refer to fig. 49, where fig. 49 is a schematic structural diagram of a first bare cell 212a, a second bare cell 212b, and a third tab 214 according to some further embodiments of the present disclosure. In this embodiment, first naked electric core 212a and the naked electric core 212b of second are the naked electric core of coiling formula. First naked electric core 212a and the range upon range of setting of the naked electric core 212b of second. The number of the tab units 214a of the third tab 214 is two, and the two tab units 214a are respectively formed by directly extending the current collector P21 of the second pole piece P2 and the current collector P41 of the fourth pole piece P4. The relay conductor 214b and the two tab units 214a are electrically connected together by welding, press-fitting, or the like. In some embodiments, two tab units 214a may be stacked to facilitate electrical connection with the transition conductor 214 b.

The differences between the battery 20 according to the first embodiment, the battery 20 according to the second embodiment, and the battery 20 according to the third embodiment are described above, and the common features of the three embodiments are described below in conjunction with the three embodiments.

Specifically, in the first embodiment, the second embodiment and the third embodiment, when the first bare cell 212a and the second bare cell 212b are both winding bare cells, please refer back to fig. 23, fig. 25, fig. 26, fig. 27, fig. 29 and fig. 38, and the first bare cell 212a is a first winding bare cell. The winding center of the first winding type naked battery cell is the first winding center. The end of the first pole piece P1 located at the first winding center exceeds the end of the second pole piece P2 located at the first winding center. That is, it is assumed that an end of the first pole piece P1 located at the first winding center is a first end of the first pole piece P1, an end of the second pole piece P2 located at the first winding center is a first end of the second pole piece P2, and an orthographic projection of the first end of the first pole piece P1 on the first end of the second pole piece P2 is located outside an edge of the second pole piece P2. A first tab 213a is electrically connected to the current collector at the first end of the first pole piece P1. Thus, in the first winding type bare cell, the two opposite sides of the first tab 213a are surrounded by the first pole piece P1, and it is not necessary to use tab glue for insulation and isolation treatment, so that the volume energy density of the battery 20 can be further improved.

Similarly, please continue to refer to fig. 23, fig. 25, fig. 26, fig. 27, fig. 29, and fig. 38, where the second bare cell 212b is a second winding-type bare cell. The winding center of the naked electric core of second coiling formula is the second center of coiling. The end of the third pole piece P3 located at the second winding center exceeds the end of the fourth pole piece P4 located at the second winding center. That is, it is assumed that an end of the third pole piece P3 at the second winding center is a first end of the third pole piece P3, an end of the fourth pole piece P4 at the second winding center is a first end of the fourth pole piece P4, and a forward projection of the first end of the third pole piece P3 on the first end of the fourth pole piece P4 is located outside an edge of the fourth pole piece P4. A second tab 213b is electrically connected to the current collector at the first end of the third pole piece P3. In this way, in the second winding-type bare cell, the opposite sides of the second tab 213b are surrounded by the third tab P3, and there is no need to use tab glue for insulation and isolation, so that the volume energy density of the battery 20 can be further improved.

In the first, second and third embodiments, one of the first pole piece P1 and the second pole piece P2 is a positive pole piece and the other is a negative pole piece, and one of the third pole piece P3 and the fourth pole piece P4 is a positive pole piece and the other is a negative pole piece. Specifically, in the first, second, and third embodiments, the polarity combinations of the first pole piece P1, the second pole piece P2, the third pole piece P3, and the fourth pole piece P4 may have the following first to fourth examples, so that the first bare cell 212a and the second bare cell 212b are connected in parallel or in series to form a composite bare cell.

Example one: the first pole piece P1 is a positive pole piece, the second pole piece P2 is a negative pole piece, the third pole piece P3 is a positive pole piece, and the fourth pole piece P4 is a negative pole piece. On the basis, since the first tab 213a is electrically connected to the current collector of the first pole piece P1, the second tab 213b is electrically connected to the current collector of the third pole piece P3, and the third tab 214 is used for leading out the electrodes of the second pole piece P2 and the fourth pole piece P4. Therefore, the first tab 213a and the second tab 213b are positive tabs, and the third tab 214 is a negative tab. First naked electric core 212a and the naked electric core 212b of second connect into compound naked electric core in parallel. The first charge and discharge port B and the second charge and discharge port C are arranged in parallel.

Example two: the first pole piece P1 is a negative pole piece, the second pole piece P2 is a positive pole piece, the third pole piece P3 is a negative pole piece, and the fourth pole piece P4 is a positive pole piece. On the basis, since the first tab 213a is electrically connected to the current collector of the first pole piece P1, the second tab 213b is electrically connected to the current collector of the third pole piece P3, and the third tab 214 is used for leading out the electrodes of the second pole piece P2 and the fourth pole piece P4. Therefore, the first tab 213a and the second tab 213b are negative tabs, and the third tab 214 is a positive tab. First naked electric core 212a and the naked electric core 212b of second are parallelly connected to become compound naked electric core. The first charge and discharge port B and the second charge and discharge port C are arranged in parallel.

Example three: the first pole piece P1 is a positive pole piece, the second pole piece P2 is a negative pole piece, the third pole piece P3 is a negative pole piece, and the fourth pole piece P4 is a positive pole piece. On the basis, since the first tab 213a is electrically connected to the current collector of the first pole piece P1, the second tab 213b is electrically connected to the current collector of the third pole piece P3, and the third tab 214 is used for leading out the electrodes of the second pole piece P2 and the fourth pole piece P4. Therefore, the first tab 213a is a positive tab, the second tab 213b is a negative tab, and the third tab 214 is a negative tab of the first bare cell 212a and a positive tab of the second bare cell 212 b. First naked electric core 212a and the naked electric core 212b of second establish ties into compound naked electric core. The first charge and discharge port B and the second charge and discharge port C are arranged in series.

Example four: the first pole piece P1 is a negative pole piece, the second pole piece P2 is a positive pole piece, the third pole piece P3 is a positive pole piece, and the fourth pole piece P4 is a negative pole piece. On the basis, since the first tab 213a is electrically connected to the current collector of the first pole piece P1, the second tab 213b is electrically connected to the current collector of the third pole piece P3, and the third tab 214 is used for leading out the electrodes of the second pole piece P2 and the fourth pole piece P4. Therefore, the first tab 213a is a negative tab, the second tab 213b is a positive tab, and the third tab 214 is a positive tab of the first bare cell 212a and a negative tab of the second bare cell 212 b. First naked electric core 212a and the naked electric core 212b of second establish ties into compound naked electric core. The first charge and discharge port B and the second charge and discharge port C are arranged in series.

Referring back to fig. 9 and 35 in conjunction with any one of the first to fourth examples described above, the protective plate 22 has a first charge and discharge circuit and a second charge and discharge circuit. The first charge and discharge circuit and the second charge and discharge circuit are integrated on the protection plate 22, not shown in the figure. The first charge and discharge circuit is electrically connected to the first bare cell 212a via the first charge and discharge port B. In addition, the protection plate 22 further has a third charge and discharge port D. The third charging/discharging port D is located on the first charging/discharging circuit. The protection board 22 is used for being electrically connected with the power management module, the charging management module and the charger through the third charging and discharging port D to form a charging and discharging link. Similarly, the second charge and discharge circuit is electrically connected to the second bare cell 212b via the second charge and discharge port C. On this basis, the protection plate 22 further has a fourth charge and discharge port E, which is located on the second charge and discharge circuit. The protection board 22 is used for being electrically connected with the power management module, the charging management module and the charger through the fourth charging and discharging port E to form another charging and discharging link.

Thus, at least two charge and discharge links are formed, the charge and discharge speed of the battery 20 can be increased, and simultaneously, with the help of the at least two charge and discharge links, charge and discharge management and detection of parameters such as capacity, cycle number and health state can be performed on one of the first bare cell 212a and the second bare cell 212b respectively, and charge and discharge management and detection of parameters such as capacity, cycle number and health state can also be performed on two of the first bare cell 212a and the second bare cell 212b simultaneously. The maximized utilization of the performance and the health state of the battery is completed, and when one naked battery cell is charged, the other naked battery cell is discharged.

It should be noted that the above embodiments only give examples in which the battery 20 includes the first bare cell 212a and the second bare cell 212 b. In other examples, on the basis of the first embodiment, the second embodiment, or the third embodiment, the battery 20 may further include a third bare cell, a fourth bare cell, a fifth bare cell, and the like. This naked electric core of third, the naked electric core of fourth, the naked electric core of fifth can be through the mass flow body of a pole piece and the mass flow body of second pole piece in the naked electric core of first or the mass flow body electrical connection of fourth pole piece in the naked electric core of second become a whole to draw forth this holistic electrode with the help of the third pole ear that has. In other embodiments, an additional tab may be disposed between a current collector of a pole piece of the third bare cell and a current collector of the second pole piece in the first bare cell, and the electrode of the pole piece and the second pole piece may be simultaneously drawn out by the additional tab, and the additional tab may be disposed between a current collector of a pole piece of the third bare cell and a current collector of the fourth pole piece of the second bare cell, and the electrode of the pole piece and the fourth pole piece may be simultaneously drawn out by the additional tab.

For example, please refer to fig. 50, where fig. 50 is a schematic diagram of a composition structure of a composite bare cell according to some embodiments of the present application. In this embodiment, battery 20 includes a third bare cell 212c in addition to first bare cell 212a and second bare cell 212 b. The third bare cell 212c is disposed within a casing (not shown) of the battery. Referring to fig. 51, fig. 51 is a schematic end surface structure view of the composite bare cell shown in fig. 41. In this embodiment, the third bare cell 212c includes a fifth pole piece P5, a sixth pole piece P6, and a fourth pole ear 213 c. One of the fifth pole piece P5 and the sixth pole piece P6 is a positive pole piece and the other is a negative pole piece. A fourth tab 213c is electrically connected to the current collector of the fifth pole piece P5. One end of the fourth lug 213c protrudes through the case of the battery to the outside of the case. The current collector of the sixth electrode sheet P6 is electrically connected to the current collector of the second electrode sheet P2 as a whole. Specifically, the current collector of the sixth pole piece P6 and the current collector of the second pole piece P2 may be electrically connected to form a whole body through contact conduction, welding, and integral molding, which is not limited in this respect. Fig. 51 shows only an example in which the current collector of the sixth electrode sheet P6 is electrically connected to the current collector of the second electrode sheet P2 in a contact electrical conduction manner to form a whole.

In this way, the third tab 214 can draw out the electrodes of the sixth pole piece P6 in addition to the electrodes of the second pole piece P2 and the fourth pole piece P4, and can further optimize the charge and discharge speed while maintaining the volumetric energy density. Furthermore, the third tab 214 may be electrically connected to a part of the current collector belonging to the second pole piece P2 and/or a part of the current collector belonging to the fourth pole piece P4 in the whole, or may be electrically connected to a part of the current collector belonging to the sixth pole piece P6 in the whole, or may be disposed between the current collector of the sixth pole piece P6 and the current collector of the second pole piece P2, and may be electrically connected to both the current collector of the sixth pole piece P6 and the current collector of the second pole piece P2.

Referring to fig. 52, fig. 52 is a schematic end surface structure diagram of a composite bare cell according to further embodiments of the present application. In the present embodiment, the current collector of the sixth pole piece P6 is electrically connected to the current collector of the fourth pole piece P4 as a whole. In this way, the third tab 214 can also simultaneously lead out the electrodes of the second pole piece P2, the fourth pole piece P4 and the sixth pole piece P6, and can further optimize the charge and discharge speed while simultaneously achieving the volumetric energy density.

Referring to fig. 53, fig. 53 is a schematic end surface structure diagram of a composite bare cell according to further embodiments of the present application. In this embodiment, the battery further includes a fifth tab 216. The fifth tab 216 is disposed between the current collector of the second pole piece P2 and the current collector of the sixth pole piece P6, and the fifth tab 216 is electrically connected to the current collector of the second pole piece P2, and the fifth tab 216 is also electrically connected to the current collector of the sixth pole piece P6. One end of the fifth tab 216 protrudes through a case (not shown) of the battery to the outside of the case. This makes it possible to achieve a certain balance between the volumetric energy density and the charge/discharge rate of the battery.

Referring to fig. 54, fig. 54 is a schematic end surface structure view of a composite bare cell according to still another embodiment of the present application. In this embodiment, the battery further includes a fifth tab 216. The fifth tab 216 is disposed between the current collector of the fourth electrode sheet P4 and the current collector of the sixth electrode sheet P6, and the fifth tab 216 is electrically connected to the current collector of the fourth electrode sheet P4, and the fifth tab 216 is also electrically connected to the current collector of the sixth electrode sheet P6. One end of the fifth tab 216 protrudes through a case (not shown) of the battery to the outside of the case.

It should be noted that, on the basis of the third embodiment, the third tab 214 includes a plurality of tab units 214a and a through conductor 214 b. The plurality of tab units 214a are respectively formed by directly extending the current collector P21 of the second pole piece P2 and the current collector P41 of the fourth pole piece P4. Based on this, the third tab further includes a tab portion. The structure of the tab portion is similar to that of the tab unit 214 a. The tab portion is formed by extending the current collector of the sixth tab P6 directly, and the relay conductor 214b is electrically connected to the tab portion in addition to the tab unit 214 a. So, draw out an electrode of three naked electric core simultaneously through the switching conductor, when further optimizing the charge-discharge speed of battery, can compromise the volume energy density to a certain extent.

In combination with the above description of the embodiments, the method for manufacturing the battery 20 will be described below by taking the battery 20 shown in fig. 35 as an example. Specifically, the method for processing the battery 20 includes the following steps S100 to S400.

S100: a first bare cell 212a and a second bare cell 212b are fabricated. Wherein, the naked electric core 212a of first naked electric core and the naked electric core 212b of second are the naked electric core of coiling formula.

Referring to fig. 55, fig. 55 is a schematic view of a composition structure of a first bare cell 212a in a processing method of a battery 20 according to some embodiments of the present disclosure. In this embodiment, the first bare cell 212a includes a second pole piece P2, a diaphragm S, a first pole piece P1, and a diaphragm S. The second pole piece P2, the diaphragm S, the first pole piece P1 and the diaphragm S are sequentially stacked, and are pressed into a first membrane structure by using the first rolling device 01 in the processing system shown in fig. 56, and then one end of the first membrane structure is clamped by the first winding needle 02 in the first winding station in the processing system shown in fig. 56 to rotate, so as to form the first bare cell 212a shown in the flow chart of the processing method shown in fig. 58 (a) by winding.

Referring to fig. 57, fig. 57 is a schematic diagram illustrating a composition structure of a second bare cell 212b in a method for processing a battery 20 according to some embodiments of the present disclosure. In this embodiment, the second bare cell 212a includes a fourth pole piece P4, a diaphragm S, a third pole piece P3, and a diaphragm S. The fourth pole piece P4, the diaphragm S, the third pole piece P3 and the diaphragm S are sequentially stacked, and are pressed into a second membrane structure by using a second rolling device 03 in the processing system shown in fig. 56, and one end of the second membrane structure is further clamped by a second winding needle 04 in a second winding station in the processing system shown in fig. 56 and rotated, so as to wind and form the second bare cell 212b shown in the flow chart of the processing method shown in fig. 58 (a).

This naked electric core 212a of first naked electric core and the naked electric core 212b of second can adopt the first needle 01 of rolling up of first winding station and the second of second winding station to roll up needle 02 simultaneously. Can improve the production efficiency of the naked electric core 212a of first naked electric core and the naked electric core 212b of second.

S200: set up third utmost point ear 214 between first naked electric core 212a and the naked electric core 212b of second, first naked electric core 212a, the relative position relation between naked electric core 212b of second and the third utmost point ear 214 refers to (b) in fig. 58, and weld this third utmost point ear 214 on the current collector of second pole piece P2 in first naked electric core 212a, weld this third utmost point ear on the current collector of fourth pole piece P4 in the naked electric core 212b of second simultaneously, obtain the compound naked electric core of series connection or parallelly connected, this compound naked electric core refers to (c) in fig. 58. In particular, the welding operation may be performed at a welding station 05 in the processing system shown in fig. 56, which may be located between the first winding station and the second winding station described above.

S300: referring to fig. 58 (d), the composite bare cell is encapsulated by a casing 211, and an electrolyte is injected into the casing 211 to obtain the cell 21 shown in fig. 58 (e). The housing 211 may be a packaging film or a steel shell. In some embodiments, the packaging film is an aluminum plastic film.

S400: and connecting a protective plate on the battery cell 21 to obtain a finished battery containing at least two winding cores connected in series or in parallel or combined in series and parallel.

The particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A battery, comprising:

a housing;

the first bare cell is arranged in the shell and comprises a first pole piece, a second pole piece and a first pole lug, one of the first pole piece and the second pole piece is a positive pole piece, the other one of the first pole piece and the second pole piece is a negative pole piece, and the first pole lug is electrically connected to a current collector of the first pole piece;

the second bare cell is arranged in the shell and comprises a third pole piece, a fourth pole piece and a second pole lug, one of the third pole piece and the fourth pole piece is a positive pole piece, the other one of the third pole piece and the fourth pole piece is a negative pole piece, and the second pole lug is electrically connected to a current collector of the third pole piece;

and the third lug is led out simultaneously from the second pole piece and the electrode of the fourth pole piece, and the first lug, the second lug and one end of the third lug penetrate through the shell and extend out of the shell.

2. The battery of claim 1, wherein the current collector of the second pole piece is electrically connected to the current collector of the fourth pole piece as a unitary body, and the third pole piece is electrically connected to the unitary body.

3. The battery of claim 2, wherein the current collector of the second pole piece and the current collector of the fourth pole piece are electrically connected into a whole by means of contact electrical conduction, direct welding or integral molding.

4. The battery according to claim 2 or 3, characterized in that the third pole piece is electrically connected to the portion of the current collector belonging to the second pole piece in the whole.

5. The battery according to claim 2 or 3, characterized in that said third pole piece is electrically connected to a portion of the current collector belonging to said fourth pole piece in said whole.

6. The battery according to claim 2 or 3, characterized in that the third tab is located between the current collector of the second pole piece and the current collector of the fourth pole piece, the third tab being electrically connected to the partial current collector of the second pole piece in the whole, the third tab also being electrically connected to the partial current collector of the fourth pole piece in the whole.

7. The battery of claim 1, wherein the third tab is disposed between the current collector of the second pole piece and the current collector of the fourth pole piece, the third tab is electrically connected to the current collector of the second pole piece, and the third tab is further electrically connected to the current collector of the fourth pole piece.

8. The battery of claim 1, wherein the third pole piece comprises a plurality of pole tab units formed by direct extension of the current collector of the second pole piece and the current collector of the fourth pole piece, and a transition conductor electrically connected to the plurality of pole tab units.

9. The battery of any of claims 1-8, wherein the first and third pole pieces are both positive pole pieces, and the first and second pole tabs are both positive pole tabs;

the second pole piece with the fourth pole piece is the negative pole piece, the third utmost point ear is the negative pole utmost point ear.

10. The battery of any of claims 1-8, wherein the first pole piece and the first pole piece of the second bare cell are both negative pole pieces, and the first tab and the second tab are both negative pole tabs;

the second pole piece of the first naked electric core and the second pole piece of the second naked electric core are positive pole pieces, and the third pole lug is a positive pole lug.

11. The battery of any of claims 1-8, wherein the first pole piece is a positive pole piece, the first tab is a positive pole tab, and the second pole piece is a negative pole piece; the third pole piece is a negative pole piece, the second pole lug is a negative pole lug, and the fourth pole piece is a positive pole piece; the third tab is a negative electrode tab of the first bare cell and is a positive electrode tab of the second bare cell;

or the first pole piece is a negative pole piece, the first pole lug is a negative pole lug, and the second pole piece is a positive pole piece; the third pole piece is a positive pole piece, the second pole lug is a positive pole lug, and the fourth pole piece is a negative pole piece; the third utmost point ear does the positive pole utmost point ear of first naked electric core just does the negative pole utmost point ear of the naked electric core of second.

12. The battery of any of claims 1-11, wherein the first bare cell and the second bare cell are wound bare cells or laminated bare cells.

13. The battery of any one of claims 1-11, wherein the first bare cell is a first wound bare cell, a winding center of the first wound bare cell is a first winding center, an end of the first pole piece located at the first winding center extends beyond an end of the second pole piece located at the first winding center, and the first tab is electrically connected to a current collector of the first pole piece located at the end of the first winding center.

14. The battery of any of claims 1-11, wherein the second bare cell is a second wound bare cell, a winding center of the second wound bare cell is a second winding center, an end of the third pole piece located at the second winding center exceeds an end of the fourth pole piece located at the second winding center, and the second pole piece is electrically connected to a current collector of the third pole piece located at an end of the second winding center.

15. The battery of any of claims 1-14, wherein the first tab and the third tab form a first charge and discharge port, and the second tab and the third tab form a second charge and discharge port;

the battery further comprises a protection plate, wherein the protection plate is provided with a first charge-discharge circuit, a second charge-discharge circuit, a third charge-discharge port and a fourth charge-discharge port;

the first charge-discharge circuit is electrically connected with the first bare cell by means of the first charge-discharge port, the third charge-discharge port is located on the first charge-discharge circuit, and the protection board is used for being electrically connected with the power management module, the charge management module and the charger by means of the third charge-discharge port to form a charge-discharge link;

the second charge and discharge circuit is electrically connected with the second naked electric core by means of the second charge and discharge port, the fourth charge and discharge port is located on the second charge and discharge circuit, and the protection board is used for being electrically connected with the power management module, the charge management module and the charger by means of the fourth charge and discharge port to form another charge and discharge link.

16. The battery of any one of claims 1-15, further comprising:

the third bare cell is arranged in the shell and comprises a fifth pole piece, a sixth pole piece and a fourth pole lug, one of the fifth pole piece and the sixth pole piece is a positive pole piece, the other one of the fifth pole piece and the sixth pole piece is a negative pole piece, and the fourth pole lug is electrically connected to a current collector of the fifth pole piece;

the current collector of the sixth pole piece and the current collector of the second pole piece are electrically connected into a whole, or the current collector of the sixth pole piece and the current collector of the fourth pole piece are electrically connected into a whole, and one end of the fourth pole lug penetrates through the shell and extends out of the shell.

17. The battery of any of claims 1-15, further comprising:

the fifth tab is arranged between the current collector of the second pole piece and the current collector of the sixth pole piece, is electrically connected to the current collector of the second pole piece, and is also electrically connected to the current collector of the sixth pole piece; or the fifth tab is arranged between the current collector of the fourth pole piece and the current collector of the sixth pole piece, the fifth tab is electrically connected to the current collector of the fourth pole piece, and the fifth tab is further electrically connected to the current collector of the sixth pole piece; one ends of the fourth pole lug and the fifth pole lug penetrate through the shell and extend out of the shell.

18. The battery of claim 8, further comprising:

the third pole piece still includes utmost point ear part, utmost point ear part by the mass flow body of sixth pole piece directly extends and forms, the switching conductor still with utmost point ear part electricity is connected.

19. An electronic device, comprising:

the battery compartment is arranged in the shell;

the power management module and the charging management module are arranged in the shell;

the battery of any of claims 1-18, said battery mounted within said battery compartment, said battery electrically connected to said power management module, said battery further electrically connected to said charge management module.