CN114512675A

CN114512675A - Electrode plate, electrode core subassembly, battery pack and electronic equipment

Info

Publication number: CN114512675A
Application number: CN202011281277.8A
Authority: CN
Inventors: 谢红斌
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2022-05-17
Also published as: WO2022100201A1

Abstract

The application discloses electrode slice, electric core subassembly, battery pack and electronic equipment, the electrode slice include the mass flow body and with the zone of heating that the mass flow body switches on, the zone of heating is used for receiving current and producing heat from the power. Adopt the electrode slice to include the mass flow body and with the zone of heating that the mass flow body switches on to behind mass flow body and zone of heating switch on, can utilize the zone of heating to receive the electric current heating, make the temperature of electrode slice improve, thereby can make the electrode slice improve electrically conductive efficiency under adverse circumstances, and guarantee the security.

Description

Electrode plate, electrode core subassembly, battery pack and electronic equipment

Technical Field

The application relates to the technical field of electronics, concretely relates to electrode slice, electric core subassembly, battery pack and electronic equipment.

Background

At present, a battery in a mobile phone is indispensable, and the charging of the battery is easily influenced by the environment of the mobile phone. As a mobile phone is often exposed to a harsh environment, the charging efficiency of a battery is reduced and safety problems are likely to occur.

Disclosure of Invention

The embodiment of the application provides an electrode slice, an electrode core assembly, a battery pack and an electronic device.

The embodiment of the application provides an electrode slice, wherein, the electrode slice include the mass flow body and with the zone of heating that the mass flow body switches on, the zone of heating is used for receiving current and producing heat from the power.

The embodiment of the application provides an electric core assembly, wherein, electric core assembly includes above-mentioned electrode slice.

The embodiment of the present application provides an electrical core assembly, wherein,

the electric core assembly comprises:

the electrode plate comprises a first current collector and a first heating layer communicated with the first current collector;

the second electrode plate is arranged opposite to the first electrode plate and comprises a second current collector;

the power input circuit is provided with a first conductive end, a second conductive end and a control unit electrically connected with the first conductive end and the second conductive end, the first conductive end and the second conductive end are used for being electrically connected with an input power supply, and the control unit is also electrically connected with the first current collector, the first heating layer and the second current collector;

when the control unit receives a first control signal, the control unit conducts the first conductive end with the first current collector, conducts the second conductive end with the second current collector and is disconnected with the first heating layer;

when the control unit receives a second control signal, the control unit conducts the first conductive end with the first current collector, conducts the second conductive end with the first heating layer and disconnects the second current collector.

The embodiment of the application provides a battery pack, wherein, battery pack includes protection circuit and foretell electrode assembly, first electrode slice with second electrode slice connection protection circuit.

The embodiment of the application provides an electronic device, wherein the electronic device comprises the battery assembly, and the battery assembly is connected with the power supply through an electric connection wire; or the battery pack is connected with the power supply in a wireless charging mode.

An embodiment of the present application provides an electronic device, wherein, the electronic device includes the above-mentioned battery pack, the battery pack is first battery pack, the electronic device further includes a second battery pack, the second battery pack is the power.

The electrode slice, the electrode assembly, the battery pack and the electronic equipment provided by the embodiment of the application adopt the electrode slice to include the current collector and the zone of heating that switches on with the current collector, thereby after the current collector and the zone of heating switch on, can utilize the zone of heating to receive the electric current heating, make the temperature of electrode slice improve, thereby can make the electrode slice improve the conduction efficiency under adverse circumstances, and guarantee the security.

Drawings

In order to more clearly illustrate the technical solution of the application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic perspective view of an electronic device provided in an embodiment of the present application;

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

FIG. 3 is a block diagram of a charging circuit for a battery assembly of the electronic device of FIG. 1;

FIG. 4 is an exploded view of a battery assembly provided by an embodiment of the present application;

FIG. 5 is a schematic cross-sectional view of an electrical core assembly provided by an embodiment of the present application;

FIG. 6 is an exploded schematic view of the electrical core assembly of FIG. 5;

FIG. 7 is a schematic cross-sectional view of a first electrode sheet of the electrical core assembly of FIG. 6;

FIG. 8 is a schematic structural view of the electric core assembly of FIG. 6 connected with a power supply;

FIG. 9 is another schematic diagram of the electric core assembly of FIG. 6 connected to a power supply;

FIG. 10 is a schematic structural diagram of a power supply connected to the electric core assembly according to another embodiment of the present application;

FIG. 11 is another schematic view of the power supply connected to the cell assembly of FIG. 10;

FIG. 12 is a schematic structural view of the electric core assembly of FIG. 9 connected to a power supply;

FIG. 13 is a schematic cross-sectional view of a first electrode sheet of an electrical core assembly provided by an embodiment of the present application;

fig. 14 is a perspective view of the first electrode sheet of fig. 13;

fig. 15 is a schematic cross-sectional view of another embodiment of the first electrode sheet of fig. 13;

fig. 16 is a schematic cross-sectional view of another embodiment of the first electrode sheet of fig. 13;

fig. 17 is a schematic cross-sectional view of another embodiment of the first electrode sheet of fig. 13;

fig. 18 is a schematic cross-sectional view of another embodiment of the first electrode sheet of fig. 13;

fig. 19 is a schematic cross-sectional view of another embodiment of the first electrode sheet of fig. 13;

FIG. 20 is another schematic view of the electric core assembly of FIG. 9 connected to a power source;

FIG. 21 is a schematic view of another embodiment of the plug assembly of FIG. 20 connected to a power source;

FIG. 22 is a schematic view showing a state where the electric core assembly of FIG. 21 is connected to a power supply;

FIG. 23 is a schematic view of the electric core assembly of FIG. 21 in another state connected to a power source;

FIG. 24 is another partial block diagram of the plug assembly of FIG. 21 connected to a power source;

FIG. 25 is a graph of a capacitor assembly of 5100mAh capacity provided herein charged at 0.7C at 25 deg.C at ambient temperature and 1.5C rate after heating to 50 deg.C;

fig. 26 is another structural view of the plug assembly of fig. 10 connected to a power source;

FIG. 27 is a schematic view of the structure of the plug assembly of FIG. 26 connected to a power source;

FIG. 28 is a schematic structural view of another embodiment of the plug assembly of FIG. 26 connected to a power source;

fig. 29 is a schematic view showing a state where the electric core assembly of fig. 28 is connected to a power supply;

FIG. 30 is a schematic view showing another state in which the electric core assembly of FIG. 28 is connected to a power supply;

fig. 31 is a schematic structural diagram illustrating a first arrangement of a first tab and a second tab in a first electrode according to an embodiment of the present application;

fig. 32 is a schematic structural diagram of a second arrangement of a first tab and a second tab in a first electrode according to an embodiment of the present application;

fig. 33 is a schematic structural diagram illustrating a third arrangement of the first tab and the second tab in the first electrode according to the embodiment of the present application;

fig. 34 is a schematic structural diagram illustrating a fourth arrangement of the first tab and the second tab in the first electrode according to the embodiment of the present application;

FIG. 35 is a schematic diagram of another cell assembly of the battery assembly provided in FIG. 4;

FIG. 36 is a schematic diagram of another cell assembly of the cell assembly provided in FIG. 4;

FIG. 37 is a schematic structural view of another embodiment of the electrical core assembly of FIG. 36;

FIG. 38 is a schematic structural view of another embodiment of the electrical core assembly of FIG. 36;

FIG. 39 is a schematic structural view of another embodiment of the electrical core assembly of FIG. 36;

FIG. 40 is a schematic diagram illustrating a plurality of cell assemblies charged with each other according to an embodiment of the present disclosure;

fig. 41 is a schematic structural diagram of wireless charging of a battery cell assembly provided in the embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The embodiments listed in the present application may be appropriately combined with each other.

The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments. For the sake of brevity, only some numerical ranges are explicitly disclosed herein. However, any lower limit may be combined with any upper limit to form ranges not explicitly recited; and any lower limit may be combined with any other lower limit to form a range not explicitly recited, and similarly any upper limit may be combined with any other upper limit to form a range not explicitly recited. Also, although not explicitly recited, each point or individual numerical value between the endpoints of a range is encompassed within that range. Thus, each point or individual value can form a range not explicitly recited as its own lower or upper limit in combination with any other point or individual value or in combination with other lower or upper limits. In the description herein, it is to be noted that, unless otherwise specified, "above" and "below" are inclusive of the present number, and "a plurality" of "one or more" means two or more. The above summary of the present invention is not intended to describe each disclosed embodiment or every implementation of the present invention. The following description more particularly exemplifies illustrative embodiments. At various points throughout this application, guidance is provided through a list of embodiments that can be used in various combinations. In each instance, the list is merely a representative group and should not be construed as exhaustive.

Referring to fig. 1, a schematic structural diagram of an electronic device 100 according to an embodiment of the present disclosure is shown. The electronic device 100 may be a phone, a television, a tablet, a cell phone, a camera, a personal computer, a laptop, a wearable device, an electric car, an airplane, and other rechargeable devices. Referring to fig. 1, in the present application, an electronic device 100 is taken as an example for description, and a person skilled in the art can easily think of structural design for other chargeable devices according to the technical means of the embodiment, so as to achieve improvement of charging efficiency.

For convenience of description, fig. 1 illustrates that the electronic device 100 is defined with reference to a first viewing angle, a width direction of the electronic device 100 is defined as an X direction, a length direction of the electronic device 100 is defined as a Y direction, and a thickness direction of the electronic device 100 is defined as a Z direction.

Referring to fig. 2, the electronic device 100 provided in the present application includes a battery assembly 10. In this embodiment, the electronic device 100 is a mobile phone. The electronic device 100 further includes a display 20, a middle frame 30 and a housing 40. The middle frame 30 and the shell 40 of the display screen 20 are fixedly connected in turn. The battery pack 10 is provided in the center frame 30. The battery pack 10 is used to supply power to the display panel 20 and a main board or the like provided on the middle frame 30.

The battery assembly 10 includes, but is not limited to, all solid-state batteries that are lithium ion batteries, lithium metal batteries, lithium-polymer batteries, lead-acid batteries, nickel-metal hydride batteries, nickel-manganese-cobalt batteries, lithium-sulfur batteries, lithium-air batteries, nickel-hydrogen batteries, lithium ion batteries, iron batteries, nano batteries, and the like. In the embodiment of the present application, the battery pack 10 is exemplified as a lithium ion battery, and those skilled in the art can easily conceive of designing other types of batteries according to the technical means of the embodiment.

The shape of the battery assembly 10 is not particularly limited in the present application. The battery assembly 10 may be in a cylindrical form, a pouch form, an arc form, a soft pack square, a cylindrical form, a prismatic form, a special shape, or the like.

Referring to fig. 3, the electronic device 100 further includes a charging interface 50, a charging circuit 60, and a charging control unit 70.

Referring to fig. 2, the charging interface 50 is disposed on the middle frame 30, so that the charging interface 50 is connected to an external power source (hereinafter referred to as a power source). Specifically, the charging interface 50 may be connected to the power supply 200 through a charging wire. The types of the charging interface 50 include, but are not limited to, a Micro USB interface, a USB Type C interface of an Android and Windows phone system mobile phone, and a Lightning interface of an IOS system mobile phone.

Referring to fig. 3, the charging circuit 60 is connected to the charging interface 50 and the battery assembly 10. The charging circuit 60 may be an integrated chip, which is disposed on the motherboard for controlling the charging current of the battery assembly 10. The charging interface 50 is connected to the charging circuit 60 via a flexible circuit board.

Referring to fig. 3, the charging control unit 70 is connected to the charging circuit 60. The charging interface 50, the charging circuit 60, the charging control unit 70 and the battery assembly 10 form a charging loop of the electronic device 100.

Referring to fig. 3, the battery assembly 10 is connected to a power supply 200 through a charging circuit 60, so that the power supply 200 charges the battery assembly 10. The current output of the power supply 200 includes a first output 210 and a second output 220. The first output terminal 210 is the positive terminal of the power supply 200, and the second output terminal 220 is the negative terminal of the power supply 200; alternatively, the first output terminal 210 is a negative terminal of the power supply 200, and the second output terminal 220 is a positive terminal of the power supply 200. The charging of the battery assembly 10 by the power supply 200 can be realized by connecting the first output terminal 210 and the second output terminal 220 with the charging circuit 60. The power supply 200 may be an external power supply of the electronic device 100, for example, the power supply 200 is a power supply formed by connecting a power adapter disposed outside the electronic device 100 with a commercial power cable, or may be a mobile power supply disposed outside the electronic device 100. When the power source 200 is an external power source of the electronic device 100, the power source 200 may be connected to the charging circuit 60 via the charging interface 50. The charging interface 50 includes a first charging terminal 51 and a second charging terminal 52. The first charging terminal 51 is connected to the first output terminal 210. The second charging terminal 52 is connected to the second output terminal 220.

It is understood that the power supply 200 may also be an internal power supply 200 of the electronic device 100. For example, the power source 200 is a backup battery pack 10 provided in the electronic apparatus 100. When the power source 200 is an internal power source 200 of the electronic device 100, the power source 200 may be directly connected to the charging circuit 60. In this embodiment, the first output terminal 210 is a negative terminal, and the second output terminal 220 is a positive terminal. When a current flows through the second output terminal 220, the charging circuit 60, the positive electrode of the battery assembly 10, the negative electrode of the battery assembly 10, and the first output terminal 210, the battery assembly 10 is charged.

For a more clear description of the charging process and the charging circuit, the present application will be illustrated by taking the state of the battery assembly 10 connected to the positive and negative poles of the power source 200 as an example. Further description of the conductive terminals of the power supply 200 related to tab connection is omitted.

Referring to fig. 4, in the present embodiment, the battery assembly 10 includes a battery assembly 1 and a battery case 2. Of course, in other embodiments, the battery assembly 10 may not have the battery case 2, and the protection circuit may be encapsulated in the encapsulation layer 8 of the battery core assembly 1.

Referring to fig. 5, the electrode assembly 1 includes a first electrode sheet 4, a second electrode sheet 5, an electrolyte 6, a separator 7, and an encapsulation layer 8. Optionally, the first electrode sheet 4 forms a positive electrode of the electric core assembly 1, and the second electrode sheet 5 forms a negative electrode of the electric core assembly 1. Optionally, the first electrode plate 4 forms a negative electrode of the electric core assembly 1, and the second electrode plate 5 forms a positive electrode of the electric core assembly 1. The present embodiment is described by taking an example in which the first electrode sheet 4 forms the positive electrode of the electrode assembly 1, and the second electrode sheet 5 forms the negative electrode of the electrode assembly 1.

Referring to fig. 6, the first electrode sheet 4 includes a first current collector 41 and a first active material 42 disposed on the first current collector 41. If the first electrode sheet 4 is a positive electrode, the first current collector 41 is a positive current collector. If the first electrode sheet 4 is a negative electrode, the first current collector 41 is a negative current collector.

Optionally, the first current collector 41 is a conductive sheet. For example, the first current collector 41 is an aluminum foil with a thickness of 10-20 μm. The first active material 42 includes a transition metal oxide or polyanion-type compound having a layered or spinel structure with a high electrode potential and a stable structure, such as lithium cobaltate, lithium manganate, lithium iron phosphate, a ternary material, and the like. The first active material layer 42 is a mixture of an active material and a binder. The first active material layer 42 is attached to the surface of the first current collector 41. The active substance can be at least one of lithium iron phosphate, lithium manganese iron phosphate, lithium vanadium phosphate, lithium vanadyl phosphate, lithium cobaltate, lithium manganate, lithium nickelate, lithium nickel cobalt manganese oxide, lithium manganese rich-based materials, lithium nickel cobalt aluminate, graphite, silicon monoxide, tin oxide, lithium titanate and the like, and the adhesive can be at least one of polyvinylidene fluoride, vinylidene fluoride-fluorinated olefin copolymer, polytetrafluoroethylene, sodium carboxymethylcellulose, styrene butadiene rubber, polyurethane, fluorinated rubber, polyvinyl alcohol, polyvinylidene fluoride, polyamide and the like.

Optionally, referring to fig. 6, the first electrode sheet 4, the diaphragm 7 and the second electrode sheet 5 are all in the shape of a sheet. The separator 7 is provided at an interval between the first electrode sheet 4 and the second electrode sheet 5 for preventing the first electrode sheet 4 from directly contacting the second electrode sheet 5. The diaphragm 7 is a specially formed polymer film, and the diaphragm 7 has a microporous structure, so that lithium ions can freely pass through the microporous structure, but electrons cannot pass through the microporous structure. The material of the separator 7 includes, but is not limited to, Polyethylene (PE), polypropylene (PP), or a composite film thereof. The composite membrane is for example a PP/PE/PP three-layer separator.

Optionally, referring to fig. 6, the second electrode sheet 5 includes a second current collector 51 and a second active material 52 disposed on the second current collector 51. The second current collector 51 is a conductive sheet. For example, the second current collector 51 is a copper foil of 10-20 μm. The second active material 52 may be layered graphite, a metal simple substance, and a metal oxide, such as graphite, carbon fiber, graphene, lithium titanate, etc., which have a potential as close to a lithium potential as possible, have a stable structure, and can store a large amount of lithium.

Optionally, referring to fig. 6, the encapsulation layer 8 is a steel shell, an aluminum shell, a nickel-plated iron shell, an aluminum-plastic film, or the like. In this embodiment, the encapsulation layer 8 may be an aluminum-plastic film, and is used to encapsulate the first electrode sheet 4, the second electrode sheet 5, and the diaphragm 7.

Alternatively, referring to fig. 6, the electrolyte 6 may be an organic solvent in which an electrolyte lithium salt is dissolved to provide lithium ions, the electrolyte lithium salt includes LiPF6, LiClO4, LiBF4, and the like, and the organic solvent is mainly composed of one or a mixture of several of diethyl carbonate (DEC), Propylene Carbonate (PC), Ethylene Carbonate (EC), dimethyl ester (DMC), and the like.

In the battery assembly 10, Li + is inserted and extracted back and forth between the first electrode tab 4 and the second electrode tab 5 during charging and discharging. During charging, Li + is extracted from the first electrode sheet 4 (positive electrode), and is inserted into the second electrode sheet 5 (negative electrode) via the electrolyte 6, so that the second electrode sheet 5 is in a lithium-rich state. The opposite is true during discharge. In other words, the first electrode sheet 4 and the second electrode sheet 5 can be electrically conducted when both are energized.

The first electrode plate 4 and the second electrode plate 5 of the electric core assembly 1 are both connected with the protection circuit 3. The protection circuit 3 may monitor the voltage of the battery pack 1 to manage charging and discharging of the battery pack 1.

Referring to fig. 7, the first electrode sheet 4 further includes a first heating layer 43 in communication with the first current collector 41. The first heating layer 43 and the first current collector 41 may be in direct contact conduction, may also be in conduction via a conductive cable connection, and may also be in conduction via coupling of a coupling element. In the present embodiment, the first heater layer 43 and the first current collector 41 are exemplified by lamination, contact and conduction.

Optionally, the first heating layer 43 is a metal sheet, and the material of the first heating layer 43 is at least one of aluminum, copper, nickel, copper, cobalt, tungsten, tin, lead, iron, silver, gold, platinum, or an alloy thereof.

Optionally, the thickness of the first heating layer 43 is 1mm to 40 mm.

Optionally, the first heating layer 43 is formed on the first current collector 41 by at least one of coating, rolling, bonding, evaporation, vapor deposition, chemical deposition, magnetron sputtering, and chemical plating.

When first mass flow body 41 and first zone of heating 43 are in the return circuit of connecting first output 210 and second output 220 jointly, first zone of heating 43 produces the joule heat, thereby it is right to realize the heating of electricity core subassembly 1 improves the temperature of electricity core subassembly 1, so that charge after the temperature of electricity core subassembly 1 reaches preset temperature, guarantee the security and the charging efficiency of charging of electricity core subassembly 1. The first heating layer 43 is a conductive layer, and the resistance of the first heating layer 43 is greater than that of the first current collector 41. When the first heating layer 43 is connected to the current of the power supply 200, the heating efficiency of the first heating layer 43 is much higher than that of the first current collector 41, so that the self-heating temperature-rising efficiency of the first electrode sheet 4 is improved.

When the first current collector 41, the electrolyte 6 and the second current collector 51 are in a loop connecting the first output end 210 and the second output end 220, a voltage difference is formed between the voltage of the first current collector 41 and the voltage of the second current collector 51, so that the charging of the cell assembly 1 is realized.

It is understood that the orthographic projection of the first active material layer 42 on the side of the first heating layer 43 facing the first active material layer 42 is located on the first heating layer 43, that is, the first heating layer 43 completely covers the first active material layer 43, so that after the first heating layer 43 generates heat, the whole of each area of the first active material layer 42 can be heated. Alternatively, the first heating layer 43 completely coincides with the first current collector 41, and the first heating layer 43 has an edge protruding with respect to the first active material layer 43 so that the first active material layer 43 can be completely heated. Of course, in other embodiments, the first heating layer 43 may also be completely overlapped with the first active material layer 43.

Referring to fig. 8, the core assembly 1 further includes a power input circuit 9, the power input circuit 9 has a first conductive terminal 91 and a second conductive terminal 92, and a control unit 93 electrically connected to the first conductive terminal 91 and the second conductive terminal 92. The first conductive terminal 91 and the second conductive terminal 92 are electrically connected to the power source 200. The control unit 93 is also electrically connected to the first current collector 41, the first heating layer 43, and the second current collector 51. The power input circuit 9 is disposed on the circuit board, and the circuit board is disposed outside the package layer 8. The circuit board and the first and

second electrode pads

4 and 5 may be connected via conductive cables to enable the control unit 93 to electrically connect the first current collector 41, the first heating layer 43 and the second current collector 51.

The power input circuit 9 is used for inputting the current of the power supply 200 to the battery module 1, so that the battery module 1 obtains the electric energy to realize temperature increase or/and charging. The first and second

conductive terminals

91 and 92 together constitute a current receiving port of the power input circuit 9. The first and second

conductive terminals

91 and 92 are disposed on the circuit board. The first and second

conductive terminals

91 and 92 are connected to the charging circuit 60 to receive the current of the power source 200 through the charging circuit 60. The first conductive end 91 is a positive terminal and the second conductive end 92 is a negative terminal.

In this embodiment, the charging circuit 60 is connected to the first output terminal 210 and the second output terminal 220 of the power supply 200, the power supply input circuit 9 is connected to the charging circuit 60, the first conductive terminal 91 is correspondingly connected to the second output terminal 220, and the second conductive terminal 92 is correspondingly connected to the first output terminal 210. After the control unit 93 controls the first conductive end 91 and the second conductive end 92 to be connected with the first current collector 41, the second current collector 51 and the electrolyte 6 to form a loop, the first conductive end 91 and the second conductive end 92 start to receive current, so that the electric energy is obtained by the electric energy core assembly 1.

The control unit 93 is used for controlling the electric energy obtained by the first conductive end 91 and the second conductive end 92 to charge the electric core assembly 1 or heat the electric core assembly 1.

The control unit 93 controls the second conductive terminal 92 to be conducted with the second current collector 51 or with the first heating layer 43, so as to control the electric energy obtained by the electric core assembly 1 from the first output end 210 and the second output end 220 to be charged or to be provided to the first heating layer 43 to generate heat for self-heating.

The control unit 93 controls the second conductive terminal 92 to be conducted with the second current collector 51 or with the first heating layer 43 by receiving the control signal. The control unit 93 receives control signals from a processor of the electronic device 100, or from a communication module of the electronic device 100, or from a sensing device.

As shown in fig. 8, when the control unit 93 receives the first control signal, the control unit 93 connects the first conductive end 91 to the first current collector 41, connects the second conductive end 92 to the second current collector 51, and disconnects the first heating layer 43, so that the first current collector 41, the electrolyte 6, and the second current collector 51 are connected to the first conductive end 91 and the second conductive end 92, the first electrode tab 4 and the second electrode tab 5 are respectively connected to the positive electrode and the negative electrode of the power supply 200, a potential difference is generated between the first electrode tab 4 and the second electrode tab 5, and lithium ions move between the first electrode tab 4 and the second electrode tab 5 under the action of the potential difference, thereby charging the battery assembly 10. At this time, the battery assembly 10 enters a charging mode. The first control signal is a control signal for controlling the charging of the cell assembly 1. Of course, in other embodiments, the first conductive end 91 may be conducted with the first heating layer 43, so that the first conductive end 91 is indirectly conducted with the first current collector 41 through the first heating layer 43, and thus the first current collector 41 and the second current collector 51 generate a potential difference, and the cell assembly 1 is charged.

As shown in fig. 9, when the control unit 93 receives the second control signal, the control unit 93 connects the first conductive end 91 with the first current collector 41, and connects the second conductive end 92 with the first heating layer 43, and disconnects the second current collector 51, so that the first current collector 41 and the first heating layer 43 are connected to the first conductive end 91 and the second conductive end 92, and the first heating layer 43 receives the electric energy input by the first conductive end 91 and the second conductive end 92, and converts the electric energy into joule heat energy, so that the first heating layer 43 heats up, and the first heating layer 43 heats the electric core assembly 1. The second control signal is a control signal for controlling the first electrode plate 4 of the electric core assembly 1 to heat and raise the temperature. Of course, in other embodiments, the second conductive end 92 may be connected to the first current collector 41 at a position spaced from the first conductive end 91, so that the second conductive end 92 is indirectly conducted with the first heating layer 43 through the first current collector 41, and the first heating layer 43 obtains the electric energy of the first conductive end 91 and the second conductive end 92 to heat the first conductive end 91 and the second conductive end 92; of course, the first conductive end 91 may be directly connected to the first heating layer 43, and the second conductive end 92 is connected to a position where the first heating layer 43 is spaced from the first conductive end 91, so that the first heating layer 43 directly obtains the electric energy of the first conductive end 91 and the second conductive end 92 to heat the first conductive end.

It can be understood that when the electronic device 100 is in a low-temperature environment, the internal reaction speed of the battery assembly 10 of the electronic device 100 is reduced, that is, the rate of lithium ion deintercalation and intercalation between the first active material layer 42 and the second active material layer 52 is reduced, so that the charging rate of the battery assembly 10 is reduced, and rapid charging cannot be achieved, which affects the use of the electronic device 100. In terms of safety of the battery assembly 10, charging the battery assembly 10 in a low temperature environment may cause lithium precipitation at the negative electrode, i.e., lithium crystals may be formed at the negative electrode of the battery assembly 10. The charge capacity of the battery assembly 10 is easily reduced due to the occurrence of lithium precipitation inside the battery assembly 10, and lithium crystals may also pierce the separator 7, resulting in a safety accident. The application the battery pack assembly 1 utilizes first mass of current body 41 and first zone of heating 43 to switch on, works as when battery pack 10 is in low temperature environment, the first mass of current body 41 of the control unit 93 control and first zone of heating 43 and first electrically conductive end 91 and the electrically conductive end 92 switch-on of second to first zone of heating 43 receives the electric energy and heats, makes battery pack assembly 1 is in the self-heating mode, in order to improve battery pack assembly 1 temperature, thereby be convenient for battery pack assembly 1 charges after the temperature reaches the requirement, guarantees battery pack 10's the security of charging, and guarantees battery pack 10's charge efficiency. When the temperature of the electrode assembly 1 is raised to meet the charging requirement, the control unit 93 controls the first current collector 41 and the second current collector 51 to be respectively connected with the first conductive end 91 and the second conductive end 92, so that the first electrode plate 4 and the second electrode plate 5 generate a potential difference, that is, the electrode assembly 1 is in a charging mode.

Referring to fig. 10, in another embodiment, the second electrode sheet 5 is further provided with a second heating layer 53 in communication with the second current collector 51.

In this embodiment, the second heating layer 53 and the second current collector 51 may be in direct contact conduction, may be in connection conduction via a conductive cable, or may be in coupling conduction via a coupling element. In the present embodiment, the second heater layer 53 and the second current collector 51 are stacked, bonded, contacted and conducted. The second heating layer 53 may be made of the same material as the first heating layer 43, or may be made of a different material from the first heating layer 43. The second heater layer 53 may be provided at the same thickness as the first heater layer 43, or may be provided at a different thickness from the first heater layer 43. The second heating layer 53 may be formed on the second current collector 51 using the same molding process as the first heating layer 43, or may be formed on the second current collector 51 using a different molding process from the first heating layer 43. The structure of combining the second heating layer 53 and the second current collector 51 can refer to the structure of combining the first heating layer 42 and the first current collector 41, and will not be described in detail herein.

Optionally, the second heating layer 53 is a metal sheet, and the material of the second heating layer 53 is composed of at least one of aluminum, copper, nickel, copper, cobalt, tungsten, tin, lead, iron, silver, gold, platinum, or an alloy thereof.

Optionally, the thickness of the second heating layer 53 is 1mm to 40 mm.

Optionally, the second heating layer 53 is formed on the second current collector 51 by at least one of coating, rolling, bonding, evaporation, vapor deposition, chemical deposition, magnetron sputtering, and chemical plating.

When the second current collector 51 and the second heating layer 53 are in the loop connecting the first output end 210 and the second output end 220 together through the power input circuit 9 and the charging circuit 60, the second heating layer 53 generates joule heat, so that the electric core assembly 1 is heated and improved, the temperature of the electric core assembly 1 is increased, so that the temperature of the electric core assembly 1 is charged after reaching the preset temperature, and the charging safety and the charging efficiency of the electric core assembly 1 are ensured. The second heating layer 53 is a conductive layer, and the resistance of the second heating layer 53 is greater than that of the second current collector 51. When the second heating layer 53 is connected to the current of the power supply 200, the heating efficiency of the second heating layer 53 is much higher than that of the second current collector 51, so that the self-heating temperature-rising efficiency of the second electrode sheet 4 is improved.

It can be understood that the second heating layer 53 is combined with the second current collector 51, so that the second electrode sheet 5 can receive current for heating, that is, the negative electrode of the electrode assembly 1 can receive current for heating. First electrode piece 4 and second electrode piece 5 set up first zone of heating 43 and second zone of heating 53 respectively, promptly the positive electrode and the negative electrode of electrode assembly 1 all have the function of circular telegram intensification, make electrode assembly 1 can select first electrode piece 4 heating intensification as required, also can select second electrode piece 5 heating intensification, in order to satisfy the heating intensification demand of electrode assembly 1 difference. Of course, if the first electrode sheet 4 is a negative electrode of the electrode assembly 1 and the second electrode sheet 5 is a positive electrode of the electrode assembly 1, only the second current collector 51 may be disposed on the second electrode sheet 5, that is, only the negative electrode of the electrode assembly 1 may have an energization heating function.

In the present embodiment, the control unit 93 is also electrically connected to the second heating layer 53. The control unit 93 may control the first conductive terminal 91 to be conducted with the first current collector 41 or the second heating layer 53. When the control unit 93 controls the first conductive end 91 to be conducted with the first current collector 41, the first conductive end 91 is disconnected from the second heating layer 53, and the control unit 93 also controls the second conductive end 92 to be conducted with the second current collector 51, the second conductive end 92 is disconnected from the first heating layer 43, at this time, if the first conductive end 91 and the second conductive end 92 are connected to the paths of the first output end 210 and the second output end 220 through the charging circuit 60, the battery pack assembly 1 is charged. When the control unit 93 controls the first conductive end 91 to be disconnected from the first current collector 41, the first conductive end 91 is connected to the second heating layer 53, the control unit 93 further controls the second conductive end 92 to be connected to the second current collector 51, and the second conductive end 92 is disconnected from the first heating layer 43, at this time, if the first conductive end 91 and the second conductive end 92 are connected to the paths of the first output end 210 and the second output end 220 through the charging circuit 60, the electric core assembly 1 can be heated by electrifying the second heating layer 53.

As shown in fig. 10, when the control unit 93 receives the third control signal, the control unit 93 connects the first conductive terminal 91 to the second heating layer 53 and disconnects the first current collector 41, and connects the second conductive terminal 92 to the second tab and disconnects the first heating layer 43, so that the second heating layer 53 and the second current collector 51 are integrally connected to the first conductive terminal 91 and the second conductive terminal 92, and the second heating layer 53 receives the current from the first conductive terminal 91 and the second conductive terminal 92 and generates joule heat to heat the second electrode plate 5. The third control signal is a control signal for controlling the temperature rise and heating of the second electrode plate 5 of the electric core assembly 1. Of course, in other embodiments, when the control unit 93 receives the third control signal, the first conductive end 91 may be connected to the second current collector 51 at a position spaced from the second conductive end 92, so that the first conductive end 91 is indirectly conducted to the second heating layer 53 through the second current collector 51, and the second heating layer 53 obtains electric energy from the first conductive end 91 and the second conductive end 92 to heat the first conductive end 91 and the second conductive end 92; of course, the second conductive end 92 may also be directly connected to the second heating layer 53, and the first conductive end 91 is connected to a position where the second heating layer 53 is spaced from the first conductive end 91, so that the second heating layer 53 directly obtains electric energy from the first conductive end 91 and the second conductive end 92 to heat the second heating layer.

Referring to fig. 9 and 10, the third control signal is different from the second control signal in instructing the control unit 93 to control different electrodes in the electric core assembly 1 to heat up. It is understood that the second control signal instructs the control unit 93 to control the positive electrode of the cell assembly 1 to perform heating at an elevated temperature, and the third control signal instructs the control unit 93 to control the negative electrode of the cell assembly 1 to perform heating at an elevated temperature.

Optionally, the second control signal includes a first voltage value and a first duration, the control unit 93 controls the voltage applied to the first heating layer 43 according to the first voltage value to control the heating temperature of the first heating layer 43, and the control unit 93 controls the duration of the current received by the first heating layer 43 according to the first duration to disconnect the first conductive terminal 91 and the second conductive terminal 92 when the duration of the current received by the first heating layer 43 reaches the first duration. The third control signal includes a second voltage value and a second time duration, the control unit 93 controls the voltage applied to the second heating layer 53 according to the second voltage value to control the heating temperature of the second heating layer 53, and the control unit 93 controls the time duration of the current received by the second heating layer 53 according to the second time duration to disconnect the first conductive terminal 91 and the second conductive terminal 92 when the time duration of the current received by the second heating layer 53 reaches the second time duration.

In one usage scenario, the control unit 93 controls the first electrode sheet 4 and the second electrode sheet 5 to alternately and cyclically heat in the first heating mode and the second heating mode, respectively. Specifically, when the first electrode sheet 4 is heated according to the first heating mode, the control unit 93 controls the first electrode sheet 4 of the electrode assembly 1 to heat at the first voltage, and stops heating the first electrode sheet 4 after continuously heating for the first time period. And when the second electrode plate 5 is heated according to the second heating mode, controlling the second electrode plate 5 to heat at the second voltage, and stopping heating the second electrode plate 5 after the second time of heating is continued. The first voltage and the second voltage may be the same or different, and the first time period and the second time period may be the same or different, that is, the first heating mode and the second heating mode may be the same or different. The first electrode plate 4 and the second electrode plate 5 are controlled by the control unit 93 to circularly and alternately heat, so that the first heating layer 43 and the second heating layer 53 can circularly and alternately heat, the loss of the first heating layer 43 and the second heating layer 53 is reduced, and the temperature rise balance of the electric core assembly 1 is ensured.

It is understood that, in still another usage scenario, the control unit 93 may control the first electrode sheet 4 to heat according to the first heating mode, and then control the first electrode sheet 4 and the second electrode sheet 5 to start to be connected to the charging circuit 60 and the power supply 200 via the first conductive terminal 91 and the second conductive terminal 92 for charging. After the first electrode plate 4 and the second electrode plate 5 are charged for a certain period of time, the control unit 93 controls the second electrode plate 5 to be heated according to the second heating mode, and after the second electrode plate 5 is heated for a certain period of time, the control unit controls the first electrode plate 4 and the second electrode plate 5 to start to be connected to the charging circuit 60 through the first conducting end 91 and the second conducting end 92 for charging. In the embodiment of the present application, a heating manner in which the control unit 93 controls the heating of the first heating layer 43 or controls the heating of the second heating layer 53 is not limited, and a charging manner in which the control unit 93 controls the first current collector 41 and the second current collector 51 to receive current for charging is also not limited.

Further, in the embodiment of fig. 10, the control unit 93 may further control the first conductive terminal 91 to be conductive with the first current collector 41 and the second heating layer 53, and the second conductive terminal 92 to be conductive with the first heating layer 43 and the second current collector 51, so that the first heating layer 43 and the second heating layer 53 are connected in parallel to the first conductive terminal 91 and the second conductive terminal 92, and the first current collector 41 and the second current collector 51 are connected to the first conductive terminal 91 and the second conductive terminal 92. The electric core assembly 1 can simultaneously utilize the first heating layer 43 and the second heating layer 53 to heat and heat, and simultaneously can also enable potential difference to be generated between the first electrode plate 4 and the second electrode plate 5 to realize charging, that is to say, the electric core assembly 1 can utilize the first electrode plate 4 and the second electrode plate 5 to charge while utilizing the first electrode plate 4 and the second electrode plate 5 to heat.

Referring to fig. 11, when the control unit 93 receives the four control signals, the control unit 93 connects the first conductive terminal 91 to the first current collector 41 and the second heating layer 53, and connects the second conductive terminal 92 to the first heating layer 43 and the second current collector 51. The fourth control signal is different from the first control signal in that the control unit 93 may be instructed to control the electric core assembly 1 to heat up and charge simultaneously so as to satisfy different usage modes of the electric core assembly 1.

Further, referring to fig. 12, in the embodiment of fig. 9, the core assembly 1 includes a first tab 44 connected to the first current collector 41, and a second tab 45 connected to the first current collector 41 or/and the first heating layer 43; the electrode assembly 1 further includes a third electrode tab 54 connected to the second current collector 51, and the control unit 93 is electrically connected to the first electrode tab 44, the second electrode tab 45 and the third electrode tab 54 to control the first electrode tab 44 to be disconnected from or connected to the first conductive end 91, the second electrode tab 45 to be disconnected from or connected to the second conductive end 92, and the second conductive end 92 to be disconnected from or connected to the third electrode tab 54.

In the present embodiment, one end of the first tab 44 is fixedly connected to the first current collector 41, and the other end of the first tab 44 is electrically connected to the control unit 93. The first tab 44 may be electrically connected to the control unit 93 via a conductive cable. One end of the second tab 45 may be fixedly connected to the first current collector 41, the first heating layer 43, or both the first current collector 41 and the first heating layer 43. The other end of the second ear 45 is electrically connected to the control unit 93, and the second ear 45 may be electrically connected to the control unit 93 via a conductive cable. One end of the third tab 54 is fixedly connected to the second current collector 51, and the other end is electrically connected to the control unit 93. The third tab 54 may be electrically connected with the control unit 93 via a conductive cable.

By fixedly connecting the first tab 44 and the third tab 54 with the first current collector 41 and the second current collector 51, respectively, the control unit 93 can respectively connect the first tab 44 and the third tab 54 with the first conductive end 91 and the second conductive end 92, so that the first tab 44 and the third tab 54 are respectively connected to the power supply 200 through the first conductive end 91 and the second conductive end 92, that is, the control unit 93 controls the first tab 44 to connect to the first conductive end 91, and controls the third tab 54 to connect to the second conductive end 92, and the first tab 44 and the third tab 54 respectively form a positive tab and a negative tab of the battery assembly 1. The control unit 93 can control the second tab 45 to be conducted with the second conductive terminal 92, so that the second tab 45 cooperates with the first tab 44 to connect the first heating layer 43 to the power source 200, so that the first heating layer 43 receives current for heating. The second tab 45 is used as an independent tab of the first electrode plate 4, so as to form a negative terminal and a positive terminal with the first tab 44 when the first electrode plate 4 needs to be connected with current for heating.

Optionally, the first tab 44, the second tab 45, and the third tab 54 are made of a conductive material. For example, the first tab 44 is made of aluminum (Al) metal, the second tab 45 is made of tweezer metal, and the third tab 54 is made of copper metal.

Optionally, the first tab 44 is welded to the first current collector 41, the second tab 45 is welded to the first current collector 41 or/and the first heating layer 43, and the third tab 54 is welded to the second current collector 51.

Optionally, the connection manner between the tab and the current collector and between the tab and the heating layer includes, but is not limited to, ultrasonic welding, laser welding, riveting, conductive adhesive electrical connection, and the like.

It can be understood that, by using the first tab 44 and the third tab 54 to respectively weld with the first current collector 41 and the second current collector 51, when the core assembly 1 is charged, the first current collector 41 and the second current collector 51 preferentially generate an electric potential difference, so that the charging efficiency is improved, and the first heating layer 43 is prevented from being connected to the first conductive end 91 and the second conductive end 92, so as to reduce the internal resistance of the core assembly 1 in a charging state.

In the embodiment of fig. 9, as shown in fig. 13, the first electrode sheet 4 is provided with two layers of first current collectors 41 and one layer of first heating layers 43, and the one layer of first heating layers 43 is provided between the two layers of first current collectors 41. The first active material layers 42 are attached to the surfaces, away from the first heating layers 43, of the two first current collectors 41, so that the surface utilization rate of the first electrode plate 4 is increased. The first heating layer 43 completely covers the surface of the first current collector 41 departing from the first active material layer 42, so that the first electrode sheet 4 is heated up and heated uniformly after the first heating layer 43 is heated up.

The first heating layer 43 and the two first current collectors 41 may be integrally formed, and after the first heating layer 43 is attached to the two first current collectors 41, the two first current collectors 41 and the one first heating layer 43 are rolled, so that the first heating layer 43 and the first current collectors 41 are combined more stably, and the reliability of the first electrode plate 4 is ensured. Of course, the conductive adhesive may be coated on both surfaces of the first heating layer 43, and then the two first current collectors 41 may be attached to both surfaces of the first heating layer 43 through the conductive adhesive. Or the first heating layer 43 may be plated or vacuum sputtered on the side of the first current collector 41 away from the first active material layer 42, and then another first current collector 41 is attached to the first heating layer 43.

Alternatively, as shown in fig. 14, the first tab 44 is welded to one of the first current collectors 41, and the second tab 45 is welded to the first heating layer 43. Specifically, one of the first current collectors 41 is provided with a hollow hole, the first heating layer 43 is partially exposed through the hollow hole, and the second tab 45 is welded to the portion of the first heating layer 43 exposed through the hollow hole.

Optionally, the first tab 44 and the second tab 45 are both welded to the same first current collector 41, and the first tab 44 and the second tab 45 are disposed at an interval.

Optionally, the first tab 44 and the second tab 45 are respectively welded to the two first current collectors 41, and the first tab 44 and the second tab 45 are spaced apart from each other.

In another embodiment, referring to fig. 15, the same as the embodiment shown in fig. 14, except that the core assembly 1 includes two first tabs 44, and the two first tabs 44 are respectively fixed to surfaces of the two first current collectors 41 facing away from the first heating layer 43. The two first tabs 44 are fixedly connected together with respect to the protruding portion of the first current collector 41, so that the two first tabs 44 together constitute a positive electrode tab of the first electrode sheet 4.

It can be understood that the core assembly 1 may also be provided with two, or three, or more than three second tabs 45, two, or three, or more than three second tabs 45 may be fixedly connected with the two layers of first current collectors 41 and the one layer of first heating layer 43 in any combination manner, the second tabs 45 only need to be arranged at intervals with the first tabs 44, and two, or three, or more than three second tabs 45 are jointly fixed together, and finally form a conductive tab for connecting the first heating layer 43 with current. Of course, in other embodiments, the electrode assembly 1 may also be provided with two or more first tabs 44, the two or more first tabs 44 may be fixedly connected to the two layers of first current collectors 41 and the one layer of first heating layer 43 in any combination manner, the two or more first tabs 44 are fixed together, and finally form a positive electrode tab of the first electrode plate 4, and form another conductive tab for receiving current from the first heating layer 43.

In the embodiment of the present application, the number of the first tabs 44 and the number of the second tabs 45 are not limited, and the connection manner of the first tabs 44 and the first current collector 41 or/and the first heating layer 43, and the connection manner of the second tabs 45 and the first current collector 41 or/and the first heating layer 43 are not limited.

In another embodiment, referring to fig. 16, the same as the embodiment shown in fig. 13, except that a plurality of first heating layers 43 are disposed between two first current collectors 41, the plurality of first heating layers 43 are disposed at intervals, and the control unit 93 controls the second conductive terminal 92 to be conducted with one or more first heating layers 43.

Specifically, the electric core assembly 1 is provided with a plurality of second tabs 45, the second tabs 45 are arranged at intervals, the second tabs 45 correspond to the first heating layers 43 in fixed connection respectively, and an insulating layer 431 is arranged between the two adjacent first heating layers 43. When the control unit 93 receives the second control signal, the second control signal includes a heating layer determining signal, and the control unit 93 determines, according to the heating layer determining signal, that one or more of the second pole ears 45 are conducted with the second conductive terminal 92, so as to determine that one or more of the first heating layers 43 are connected to the first conductive terminal 91 and the second conductive terminal 92, so that the electric core assembly 1 can select one or more of the received currents as needed for heating and warming, so as to satisfy multiple heating and warming modes of the electric core assembly 1. For example, when the electric core assembly 1 is in an extremely cold environment, and the electric core assembly 1 needs to be heated up rapidly, the control unit 93 may control the second pole ears 45 to be conducted with the second conductive end 92, so that the first heating layers 43 are connected to the first conductive end 91 and the second conductive end 92 at the same time, so as to satisfy the requirement that the first heating layers 43 are heated up at the same time, and the temperature of the electric core assembly 1 can be raised rapidly. For another example, when the electric core assembly 1 is in a slightly low temperature environment, and an excessively high temperature rise rate is likely to damage the electric core assembly 1, the control unit 93 may control one of the second pole lugs 45 to be in conduction with the second conductive terminal 92, so as to heat up and heat up one of the first heating layers 43, so that the electric core assembly 1 may be slowly heated up.

It is understood that the plurality of first heating layers 43 are respectively connected to the first conducting terminal 91 and the second conducting terminal 91 through the first tab 44 and the second tab 45, the plurality of first heating layers 43 may be connected to the first conducting terminal 91 and the second conducting terminal 92 in parallel, or may be connected to the first conducting terminal 91 and the second conducting terminal 92 in series.

Referring to fig. 17, in another embodiment, substantially the same as the embodiment shown in fig. 13, the first electrode sheet 4 is provided with a first current collector 41 and a first heating layer 43, and the first heating layer 43 is laminated on one surface of the first current collector 41. The first electrode sheet 4 is provided with the first current collector 41 and the first heating layer 43, thereby reducing the production cost of the first electrode sheet 4. Specifically, the first electrode sheet 4 is further provided with a protective layer 46, the protective layer 46 is attached to the first heating layer 43 to be away from the first current collector 41, and the first heating layer 43 is attached to the first current collector 41. The protective layer 46 protects the first heating layer 43 to ensure the safety of the first heating layer 43, and the protective layer 46 can also increase the durability of the first electrode sheet 4, prevent the first electrode sheet 4 from being punctured, and increase the safety of the electric core assembly 1.

Referring to fig. 18, in another embodiment, substantially the same as the embodiment shown in fig. 13, the first electrode sheet 4 is provided with a first current collector 41 and a first heating layer 43, and the first heating layer 43 is disposed in the first current collector 41. The first heating layer 43 is integrated in the first current collector 41, so that the inside of the first current collector 41 can receive current, the whole first current collector 41 can generate heat to heat up, and the thinness of the first electrode plate 4 is ensured. Opposite sides of the first current collector 41 are provided with first active material layers 42 to increase the surface utilization of the first current collector 41.

Referring to fig. 19, in another embodiment, substantially the same as the embodiment shown in fig. 13, except that the first electrode sheet 4 is disposed with the first heating layer 43 and the first current collector 41 spaced apart from each other, a heat conductive layer 430 is disposed between the first heating layer 43 and the first current collector 41, and the first heat conductive layer 430 is used for transmitting current from the first current collector 41 to the first heating layer 43 or transmitting current from the first heating layer 43 to the first current collector 41, and is used for uniformly transmitting heat of the first heating layer 43 to the first current collector 41. The thermally and electrically conductive layer 430 completely covers the first current collector 41. When the first heating layer 43 receives current to generate heat, the heat conductive layer 430 can conduct heat to all positions of the first current collector 41 in a balanced manner, so that the first current collector 41 is heated in a balanced manner, and all areas of the core assembly 1 are heated in a balanced manner. If the first tab 44 and the second tab 45 are connected to the first current collector 41 and the first heating layer 43 respectively, when the control unit 93 controls the first tab 44 and the second tab 45 to be connected to the first conductive end 91 and the second conductive end 92 respectively, the heat conductive layer 430 connects the first current collector 41 and the first heating layer 43, so that the first tab 44, the first current collector 41, the heat conductive layer 430, the first heating layer 43, and the second tab form a loop between the first conductive end 91 and the second conductive end 92, and the first heating layer 43 receives current to generate heat. If the first tab 44 and the second tab 45 are both connected to the first heating layer 43, when the first tab 44 and the second tab 45 are connected to the power supply 200, the heat conductive layer 430 is not responsible for transmitting current to the first current collector 41, and is only responsible for transmitting heat to the first current collector 41, and when the first tab 44 and the third tab 54 are connected to the power supply 200, the heat conductive layer 430 is responsible for transmitting current from the first heating layer 43 to the first current collector 41, so that the first current collector 41 and the second current collector 51 generate a potential difference, and the battery assembly 1 is charged. If the first tab 44 and the second tab 45 are connected to the first current collector 41, when the first tab 44 and the second tab 45 are connected to the power supply 200, the heat conductive layer 430 transmits current from the first current collector 41 to the first heating layer 43, so that the first heating layer 43 is connected to the power supply 200 to generate heat. Optionally, the conductive layer 430 is a graphite layer, or a copper layer, or a silver layer, or a magnesium aluminum alloy layer.

It can be understood that the present application protects an electrode sheet, and the structure of the electrode sheet refers to the first electrode sheet 4 in the embodiments of the present application, and is not described herein again. The electrode plate can be applied to the electrode assembly 1 in the embodiment of the present application, and can also be applied to other electronic devices, the electronic devices can be powered on by using the electrode plate and can also be heated by using the electrode plate, and the electrode plate is balanced in heating. For example, the electronic device is an electrotherapy massage sheet or a heat compress electromagnetic sheet applied to wearing equipment.

The structure of laminating and combining the first current collector 41 and the first heating layer 43 of the first electrode sheet 4 in the embodiment of the present application may be understood as a composite current collector structure, and may also be understood as an assembly structure of a current collector and a heating layer.

Further, in the embodiment shown in fig. 9, referring to fig. 20, the control unit 93 is provided with a first switch unit 931, one end of which is connected to the second conductive terminal 92, one end of which is connected to the first heating layer 43, and the other end of which is connected to the second current collector 51.

Optionally, the first switch unit 931 is a single-pole double-throw analog switch, so as to reduce the number of components of the battery assembly 10, save cost, and reduce volume. The first switching unit 931 and the protection circuit 3 may be disposed on the same circuit board to improve the device concentration of the battery assembly 10 and to improve the utilization of the circuit board.

Specifically, the first switching unit 931 has a first terminal 9311, a second terminal 9312 and a third terminal 9313, and the first terminal 9311 of the first switching unit 931 is connected to the second conductive terminal 92. The second end 9312 of the first switching unit 931 is connected to the second pole lug 45. The third terminal 9313 of the first switching unit 931 is connected to the third pole ear 54. The first switching unit 931 is configured to receive the first control signal and conduct the second conducting terminal 92 and the third tab 54 under the action of the first control signal; alternatively, the first switch unit 931 is configured to receive the second control signal and conduct the second conductive terminal 92 and the second tab 45 under the action of the second control signal.

When the first end 9311 and the second end 9312 of the first switch unit 931 are turned on, and the first end 9311 and the third end 9313 of the first switch unit 931 are turned off, the second conductive terminal 92 is connected to the second tab 45, and the second conductive terminal 92 is disconnected from the third tab 54, at this time, a charging path is formed between the first conductive terminal 91, the first tab 44, the first heating layer 43, the second tab 45, and the second conductive terminal 92, in other words, the first heating layer 43 is connected to the positive electrode and the negative electrode of the power supply 200, and the first heating layer 43 generates joule heat when a current flows through the first heating layer 43. At this time, the battery assembly 10 enters a self-heating mode.

When the first end 9311 and the second end 9312 of the first switch unit 931 are disconnected, and the first end 9311 and the third end of the first switch unit 931 are connected, the second conductive end 92 is connected to the first tab 44, and the second conductive end 92 is disconnected from the third tab 54, at this time, a charging path is formed between the first conductive end 91, the first tab 44, the first electrode sheet 4, the second electrode sheet 5, the third tab 54, and the second conductive end 92, the first electrode sheet 4 and the second electrode sheet 5 are electrically connected to the positive electrode and the negative electrode of the power supply 200, respectively, a potential difference is generated between the first electrode sheet 4 and the second electrode sheet 5, and lithium ions move between the first electrode sheet 4 and the second electrode sheet 5 under the action of the potential difference, so as to charge the battery assembly 10. At this time, the battery assembly 10 enters a charging mode.

In the first scenario, at a temperature lower than the normal charging temperature of the battery pack assembly 1 (e.g., lower than 10 ℃), the battery pack assembly 1 is affected by a low temperature, so that the reaction speed inside the battery pack assembly is reduced, and the like, so that the battery can not be charged quickly, and the normal operation of the battery is affected. Therefore, the first switch unit 931 is used for connecting the second conductive terminal 92 and the second tab 45 and disconnecting the second conductive terminal 92 and the third tab 54, so that the first heating layer 43 is electrically connected to the positive electrode and the negative electrode of the power supply 200, and the first heating layer 43 generates joule heat, so that heat is generated inside the battery cell, the temperature inside the battery cell can be rapidly increased, the reaction speed inside the battery cell assembly 1 is further increased, and the charging rate of the battery is increased.

In the second scenario, at the normal charging temperature of the cell assembly 1, before charging, the first switch unit 931 turns on the second conductive end 92 and the second tab 45 and turns off the second conductive end 92 and the third tab 54, so that the first heating layer 43 is electrically connected to the positive and negative electrodes of the power supply 200, and thus, heat is generated inside the cell, which can effectively improve the charging rate. For example, the charging rate of the normal quick charging of the battery cell is 1.5C (used for representing the charging and discharging capacity rate of the battery), and the charging rate is 3C quick charging mode after the battery cell is heated to 50 ℃.

In other words, when the charging circuit 60 receives a charging instruction, before the cell assembly 1 enters the charging stage, the cell assembly 1 is controlled to enter the self-heating mode, so that the reaction speed inside the cell assembly 1 is awakened at a low temperature, the reaction speed inside the cell assembly 1 can be increased at a normal charging temperature, and the charging rate of the cell assembly 1 can be greatly increased.

In the electrode assembly 1 provided in the embodiment of the present application, the first heating layer 43 is additionally disposed on the first current collector 41 of the first electrode plate 4, and the first switch unit 931 is utilized to gate the second electrode tab 45 and the second conductive terminal 92 or the third electrode tab 54 and the second conductive terminal 92, so that the electrode assembly 1 can be switched to a self-heating mode or a charging mode. Before the electric core assembly 1 enters a charging mode, the electric core assembly 1 is controlled to enter a self-heating mode, so that the problem of low reaction speed inside the electric core assembly 1 at low temperature (lower than the normal charging temperature of the electric core assembly 1) can be effectively solved, and the charging rate can be further improved at non-low temperature; so, this application is in 1 structural change of battery pack spare is minimum, with under the minimum condition of the increase volume of battery pack spare 1, not only solve the low or unable normal problem of charging of charge rate under the low temperature effectively, can also break through effectively the rated charge multiplying power of 1 design of battery pack spare promotes by a wide margin the speed of charging of battery pack spare 1.

Referring to fig. 21, in another embodiment, substantially the same as the embodiment shown in fig. 20, the control unit 93 includes a first switch 9301 and a second switch 9302. One end of the first switch 9301 is used to connect the second conductive terminal 92. The other end of the first switch 9301 is connected to the second pole ear 45. Optionally, the first switch 9301 can be a triode switch or a field effect transistor switch.

One end of the second switch 9302 is used to connect the second conductive terminal 92. The other end of the second switch 9302 is connected to the third pole ear 54. Optionally, the second switch 9302 may be a triode switch or a field effect transistor switch. Optionally, the first switch 9301, the second switch 9302 and the protection circuit 3 are disposed on the same circuit board, so that the components of the battery pack 10 are disposed in a centralized manner.

The first switch 9301 and the second switch 9302 are independent of each other to control the conduction of the second tab 45 and the second conductive terminal 92 and the conduction of the third tab 54 and the second conductive terminal 92, respectively, so as to improve the gating accuracy and reduce the gating error.

In this embodiment, the control unit 93 and the protection circuit 3 may be disposed on the same circuit board, so that the devices of the battery assembly 10 are disposed in a centralized manner, thereby facilitating device formation and saving space. The control unit 93 is an integrated chip. The control unit 93 has a control circuit 930, and the control circuit 930 is used for gating the second conductive terminal 92 and the second tab 45 or the second conductive terminal 92 and the third tab 54 according to the control signal received by the control unit 93.

In the embodiment shown in fig. 21, the control circuit 930 is used to control the first switching unit 931 to gate the second conducting terminal 92 and the second pole ear 45 or gate the second conducting terminal 92 and the third pole ear 54. After the control unit 93 receives the first control signal, the control circuit 930 controls the first switch unit 931 to gate the second conducting terminal 92 and the third tab 54 according to the first control signal, and the battery module 1 enters the charging mode. The control circuit 930 controls the first switching unit 931 to gate the second conductive terminal 92 and the second tab 45 according to the second control signal, and the electric core assembly 1 enters a self-heating mode.

The control unit 93 connects the first switch 9301 and the second switch 9302. As shown in fig. 21, the control unit 93 receives a first control signal, and the control circuit 930 is configured to control the first switch 9301 to be turned off and the second switch 9302 to be turned on according to the first control signal, at this time, the battery module 1 enters the charging mode. As shown in fig. 22, the control unit 93 receives the second control signal, and the control circuit 930 is configured to control the first switch 9301 to be turned on and the second switch 9302 to be turned off according to the second control signal, so that the core assembly 1 enters the self-heating mode.

For example, the first switch 9301 and the second switch 9302 are both transistors. The first switch 9301 and the second switch 9302 are of different types. For example, the first switch 9301 is an N-type transistor, and the second switch 9302 is a P-type transistor. Alternatively, the first switch 9301 is a P-type transistor and the second switch 9302 is an N-type transistor. In this embodiment, the first switch 9301 includes an emitter, a base, and a collector. The base of the first switch 9301 is connected to the control circuit 930, the emitter of the first switch 9301 is connected to the second conductive terminal 92, and the collector of the first switch 9301 is connected to the second tab 45. The second switch 9302 includes an emitter, a base, and a collector. The base of the second switch 9302 is connected to the control circuit 930, the collector of the second switch 9302 is connected to the second conductive terminal 92, and the emitter of the second switch 9302 is connected to the third tab 54.

It is understood that, as shown in fig. 22, when the control unit 93 receives the first control signal, the control circuit 930 generates a high level signal and transmits the high level signal to the base of the first switch 9301 and the base of the second switch 9302, the high level signal makes the emitter and the collector of the first switch 9301 disconnected and the emitter and the collector of the second switch 9302 conducted, and at this time, the battery assembly 10 enters the charging mode. The first control signal is a signal received by the processor of the electronic device 100 when the battery pack 10 satisfies the charging condition after the battery pack 10 is connected to the conductive terminal of the power supply 200. The battery assembly 10 meets the charging condition that the ambient temperature of the battery assembly 10 meets the charging safety requirement of the battery assembly 10.

As shown in fig. 23, when the control unit 93 receives the second control signal, the control circuit 930 generates a low level signal, which causes the emitter and the collector of the second switch 9302 to be disconnected and the emitter and the collector of the first switch 9301 to be turned on, and transmits the low level signal to the base of the first switch 9301 and the base of the second switch 9302, at which time the battery assembly 10 enters the self-heating mode. The second control signal is a signal received by the processor of the electronic device 100 when the battery pack 10 does not satisfy the charging condition after the battery pack 10 is connected to the conductive terminal of the power supply 200. The battery assembly 10 does not satisfy the charging condition that the ambient temperature of the battery assembly 10 does not satisfy the charging safety requirement of the battery assembly 10.

Further, referring to fig. 24, the electric core assembly 1 further includes a temperature sensor 80. The temperature sensor 80 is connected to the control unit 93. Temperature sensor 80 is configured to detect that the temperature of cell assembly 1 sends a first control signal to control unit 93 when a first predetermined temperature threshold value, and detect that the temperature of cell assembly 1 sends a second control signal to control unit 93 when the first predetermined temperature threshold value.

Optionally, the temperature sensor 80 is disposed on the main board of the electronic device 100, and is close to the location of the electrical core assembly 1. The control unit 93 controls the first switch 9301 to be turned off and the second switch 9302 to be turned on according to the first control signal.

The first preset temperature threshold is a temperature that guarantees the charging rate of the electric core assembly 1. Generally, when the ambient temperature is too low, the capacity of the electric core assembly 1 is reduced, the voltage is reduced, and especially in the process of continuous charging, lithium ions are easy to deposit at the negative electrode to form polarization voltage, so that the electric core assembly 1 loses electric activity, resulting in that the electric core assembly 1 is charged into the electric core assembly 1 in a low-temperature environment, and the electric core assembly 1 is in a normal charging state and the charging rate is not influenced in a preset temperature threshold environment. Optionally, the first preset temperature threshold is greater than X and smaller than Y, X is within a range of 10 ℃ to 12 ℃, and Y is within a range of 55 ℃ to 80 ℃.

When the temperature sensor 80 detects that the temperature of the battery pack assembly 1 satisfies a first preset threshold, the temperature sensor 80 sends a first control signal to the control unit 93 through the processor of the electronic device 100, that is, the processor of the electronic device 100 sends the first control signal to the control unit 93. The control unit 93 controls the first switch 9301 to be turned off and the second switch 9302 to be turned on according to the first control signal, so that the cell assembly 1 enters a charging mode, and the cell assembly 1 is normally charged.

Temperature sensor 80 sends a second control signal to control unit 93 when detecting that the temperature of electric core assembly 1 satisfies a second preset temperature threshold. The second preset temperature threshold is less than or equal to X.

The control unit 93 is configured to control the first switch 9301 to be turned on and the second switch 9302 to be turned off according to the second control signal, so that the first heating layer 43 of the first electrode plate 4 starts to generate heat, so that the electric core assembly 1 is in a self-heating mode, the temperature of the electric core assembly 1 starts to rise, after the temperature of the electric core assembly 1 rises to a first preset temperature threshold, the electric core assembly 1 can ensure charging safety and charging rate, and then the second switch 9302 is turned off and the first switch 9301 is turned on, so as to start a normal charging mode (or a fast charging mode).

The temperature sensor 80 is further configured to send a heating stop signal to the control unit 93 when detecting that the temperature of the electric core assembly 1 is at a third preset temperature threshold, and the control unit 93 controls the first switch 9301 to be turned off according to the heating stop signal, so that the electric core assembly 1 stops self-heating. The third preset temperature is greater than or equal to Y, and Y is the high-temperature critical temperature influencing the charging performance of the electric core assembly 1. For example, Y takes the value of 60 ℃. When the temperature sensor 80 detects that the temperature of the electric core assembly 1 is greater than or equal to 60 ℃, the temperature sensor 80 sends a heating stop signal to the control unit 93. The control unit 93 controls the first switch 9301 to be turned off according to the heating stop signal, so that the electric core assembly 1 enters the heating stop mode. In this embodiment, since the temperature of the battery pack 1 is raised to 60 ℃ before the charging mode, the problem of low charging efficiency at low temperature is effectively solved, and the charging rate of the battery pack 1 can be made higher.

Optionally, the battery pack assembly 1 further includes a charging detection unit 110. Alternatively, the charging detection unit 110 and the protection circuit 3 may be disposed on the same circuit board, and the charging detection unit 110 may also be disposed on a main board of the electronic device 100.

The charge detection unit 110 is connected to the control unit 93. The charging detection unit 110 is configured to detect a connection state between the cell assembly 1 and the power supply 200, and send a connection instruction to the control unit 93 when the cell assembly 1 and the power supply 200 are connected, and the control unit 93 controls the first switch 9301 to be turned off and the second switch 9302 to be turned on according to the connection instruction and the first control signal, so that the cell assembly 1 enters a charging mode; the control unit 93 controls the first switch 9301 to turn on the second switch 9302 to turn off according to the on command and the second control signal, so that the electric core assembly 1 enters a self-heating mode.

In other words, when the electric core assembly 1 is powered on 200, the charging detection unit 110 detects that the electric core assembly 1 is changed from the off state to the on state, the charging detection unit 110 sends an on instruction to the control unit 93, and the control unit 93 controls the electric core assembly 1 to enter the to-be-heated or to-be-charged mode.

So, when the battery pack 1 is already in the normal charging temperature interval (or the fast charging temperature interval), i.e. the control unit 93 receives the first control signal, the control unit 93 turns on the first switch 9301 and turns off the second switch 9302 to heat the battery pack 1 in the current loop, so that the temperature of the battery pack 1 rises to the higher temperature interval, then turns on the second switch 9302 and turns off the first switch 9301 to open the larger charging rate, for example, at room temperature the normal fast charging rate of the battery pack 1 is 1.5C, and the fast charging mode of the fast charging rate of 3C starts after heating to 50 ℃.

Referring to fig. 25, a 0.7C graph of the capacity of the cell assembly 11 at 5100mAh is shown for charging at 0.7C at 25℃ and 1.5C after heating to 50℃. It can be seen from the figure that the full charge time at normal temperature is 155min, and the boost rate charge time after heating is shortened to 88min, so that the charge speed of the battery after heating can be greatly increased.

Further, referring to fig. 26, in the embodiment shown in fig. 10, the electric core assembly 1 further includes a fourth tab 55 connected to the second current collector 51 or/and the second heating layer 53, and the control unit 93 is further configured to control the fourth tab 55 to be disconnected from or connected to the first conductive terminal 91.

In the present embodiment, one end of the fourth tab 55 may be fixedly connected to the second current collector 51, may be fixedly connected to the second heating layer 53, or may be fixedly connected to both the second current collector 51 and the second heating layer 53. The other end of the fourth lug 55 is electrically connected to the control unit 93, and the fourth lug 55 can be electrically connected to the control unit 93 via a conductive cable. The control unit 93 can control the third tab 54 to be conducted with the second conductive terminal 92, and control the fourth tab 55 to be conducted with the first conductive terminal 91, so that the third tab 54 and the fourth tab 55 cooperate together to connect the second heating layer 53 to the power supply 200, so that the second heating layer 53 receives current for heating, and the electric core assembly 1 is in a self-heating mode. The fourth tab 55 is an independent tab of the second electrode sheet 5, so as to form a negative terminal and a positive terminal with the third tab 54 when the second electrode sheet 5 needs to be connected with current for heating.

Optionally, the material of the fourth tab 55 is the same as that of the second tab 45, or the material of the fourth tab 55 is the same as that of the first tab 44.

Optionally, the fourth tab 55 is welded to the second current collector 51 or/and the second heating layer 53.

In the embodiment shown in fig. 26, the connection manner of the fourth tab 55 and the second electrode tab 5 can be referred to the connection manner of the second tab 45 and the first electrode tab 4. In the embodiment of the present application, the number of the fourth lugs 55 is not limited, the connection manner between the fourth lugs 55 and the second current collector 51 or/and the second heating layer 53 is also not limited, and the structure of the second current collector 51 and the second heating layer 53 arranged on the second electrode plate 5 is similar to the structure of the first current collector 41 and the first heating layer 43 arranged on the first electrode plate 4, which is not repeated herein.

Further, referring to fig. 27, in the embodiment shown in fig. 26, the control unit 93 includes a second switch unit 932. One end of the second switching unit 932 is connected to the first conductive terminal 91. The other two ends of the second switching unit 932 are connected to the first tab 44 and the fourth tab 55, respectively. The second switch unit 932 is configured to receive the control signal and conduct the first conductive terminal 91 and the first tab 44 under the action of the control signal; alternatively, the second switch unit 932 is configured to receive the control signal and conduct the first conductive terminal 91 and the fourth electrode 55 under the action of the control signal.

One end of the second switching unit 932 is connected to the protection circuit 3. The second switching unit 932 is connected to the first output terminal 210 of the power supply 200 via the protection circuit 3. Further, the second switching unit 932 and the protection circuit 3 may be disposed on the same circuit board to improve the device concentration of the battery assembly 10 and improve the utilization rate of the circuit board.

Referring to fig. 27, the other two ends of the second switch unit 932 are respectively connected to the first tab 44 and the fourth tab 55. The second switch unit 932 is configured to receive the control signal and conduct the first conductive terminal 91 and the first tab 44 or conduct the first conductive terminal 91 and the fourth tab 55 under the action of the control signal. Optionally, the second switch unit 932 may be a single-pole double-throw analog switch to reduce the number of components of the core assembly 1, save cost, and reduce volume.

Referring to fig. 28, the control unit 93 includes a third switch 9303 and a fourth switch 9304, which are substantially the same as the embodiment shown in fig. 27. One end of the third switch 9303 and one end of the fourth switch 9304 are both used for connecting the first conductive terminal 91. The other end of the third switch 9303 is connected to a first tab 44. The other of the fourth switches 9304 is connected to a fourth tab 55. Optionally, the third switch 9303 can be a triode switch or a fet switch. Optionally, the fourth switch 9304 may be a triode switch or a fet switch. Optionally, the third switch 9303, the fourth switch 9304, and the protection circuit 3 are disposed on the same circuit board, so that the devices are collectively disposed.

The third switch 9303 and the fourth switch 9304 are independent to each other to control the conduction of the first tab 44 and the first conductive terminal 91 and the conduction of the fourth tab 55 and the first conductive terminal 91, respectively, so that the gating accuracy is improved and the gating error is reduced.

Referring to fig. 29, the third switch 9303 and the fourth switch 9304 are both connected to the control unit 93. The second control signal is used to instruct the control unit 93 to control the third switch 9303 to be turned on and the fourth switch 9304 to be turned off, and to control the first switch 9301 to be turned on and the second switch 9302 to be turned off, so that the first conductive terminal 91 is connected to the first tab 44, and the second conductive terminal 92 is connected to the second tab 45, at this time, the first heating layer 43 of the first electrode tab 4 is connected to the current of the power supply 200 via the first conductive terminal 91 and the second conductive terminal 92 to generate heat, so that the electrode assembly 1 enters a self-heating mode.

Referring to fig. 30, the third control signal is used to instruct the control unit 93 to control the third switch 9303 to turn off and the fourth switch 9304 to turn on, and control the first switch 9301 to turn off and the second switch 9302 to turn on the first conductive terminal 91 and the fourth tab 55, and the second conductive terminal 92 and the third tab 54, so that the second heating layer 53 of the second electrode sheet 5 is connected to the current of the power supply 200 through the first conductive terminal 91 and the second conductive terminal 92 to generate heat, and the electric core assembly 1 enters the self-heating mode.

Optionally, the third switch 9303 and the fourth switch 9304 are both transistors. The connection between the third switch 9303 and the first conductive terminal 91, the control unit 93, and the third tab 54 can refer to the connection between the first switch 9301 and the second conductive terminal 92, the control unit 93, and the second tab 45, which will not be described herein again. Similarly, the connection manner of the fourth switch 9304 with the first conductive terminal 91, the control unit 93 and the fourth tab 55 can refer to the connection manner of the second switch 9302 with the second conductive terminal 92, the control unit 93 and the third tab 54, which is not described herein again.

The first heating layer 43 of the first electrode plate 4 and the second heating layer 53 of the second electrode plate 5 can independently self-heat by additionally arranging the tab and the switch. The control of the self-heating of the first heating layer 43 of the first electrode sheet 4 and the second heating layer 53 of the second electrode sheet 5 includes, but is not limited to, the following embodiments.

Referring to fig. 29, in the first heating stage, the control unit 93 controls the first switch 9301 to be turned on, the second switch 9302 to be turned off, the third switch 9303 to be turned on, and the fourth switch 9304 to be turned off, and at this time, the first heating layer 43 of the first electrode sheet 4 is connected to the power supply 200 through the first conductive terminal 91 and the second conductive terminal 92 for self-heating.

Referring to fig. 30, in the second heating stage, the control unit 93 controls the first switch 9301 to be turned off, the second switch 9302 to be turned on, the third switch 9303 to be turned off, and the fourth switch 9304 to be turned on, and at this time, the second heating layer 53 of the second electrode sheet 5 is connected to the power supply 200 through the first conductive terminal 91 and the second conductive terminal 92 for self-heating. There is a time interval between the first heating stage and the second heating stage. Further, the first heating layer 43 of the first electrode sheet 4 and the second heating layer 53 of the second electrode sheet 5 may be alternately controlled to be self-heated.

In other words, the self-heating of the first electrode plate 4 and the second electrode plate 5 is controlled in a time-sharing manner, so that on one hand, the heating uniformity of the electric core assembly 1 can be improved; on the other hand, the use frequencies of the first electrode plate 4 and the second electrode plate 5 can be balanced, and the stability of the battery is improved.

The specific structures of the first electrode sheet 4 and the second electrode sheet 5 are not specifically limited in the present application, and the structures of the first electrode sheet 4 and the second electrode sheet 5 are described in the present application by way of example below, but it is needless to say that the structures of the first electrode sheet 4 and the second electrode sheet 5 provided in the present application include, but are not limited to, the following embodiments.

Alternatively, referring to fig. 31, the first electrode sheet 4 and the second electrode sheet 5 are both substantially rectangular plate-shaped. The first electrode sheet 4 includes two long sides 401 disposed opposite to each other, and two short sides 402 connected between the two long sides 401. The length of each long side 401 is greater than or equal to the length of each short side 402.

In a first possible embodiment, please refer to fig. 30, the first tab 44 and the second tab 45 are respectively located on two short sides 402.

Further, first utmost point ear 44 is roughly diagonal setting with second utmost point ear 45, so, can increase the conductive path between first utmost point ear 44 and the second utmost point ear 45, and then improve the internal resistance that the electric current passes through second zone of heating 53, and then increase the calorific capacity of first zone of heating 43, improve electric core subassembly 1's intensification efficiency.

In a second possible embodiment, referring to fig. 32, the first tab 44 and the second tab 45 are respectively disposed on two long sides 401. Further, the first tab 44 and the second tab 45 are disposed substantially diagonally, which is similar to the previous embodiment, so that the conductive path between the first tab 44 and the second tab 45 can be increased, and further the internal resistance of the current passing through the first heating layer 43 is increased, and further the heat productivity of the second heating layer 53 is increased, and the temperature rising efficiency of the electric core assembly 1 is improved.

In a third possible embodiment, referring to fig. 33, the first tab 44 and the second tab 45 are located on a long side 401 and close to two short sides 402.

In this embodiment, the first tab 44 and the second tab 45 are provided on the same side as the two embodiments, so that both the lead wire connected to the first tab 44 and the lead wire connected to the second tab 45 can be led out from the long side 401, thereby avoiding disorder of the lead wires. Meanwhile, the first tab 44 and the second tab 45 are respectively close to the two short sides 402, so that the conductive path between the first tab 44 and the second tab 45 can be effectively increased, the heat productivity of the first heating layer 43 is further increased, and the temperature rise efficiency of the electric core assembly 1 is improved.

In a fourth possible embodiment, referring to fig. 34, the first tab 44 and the second tab 45 are located at one short side 402 and close to two long sides 401, respectively.

In the present embodiment, similarly to the third embodiment, the first tab 44 and the second tab 45 are provided on the same side, so that both the lead wire connected to the first tab 44 and the lead wire connected to the second tab 45 can be led out from the short side 402, thereby avoiding lead wire disorder. Meanwhile, the first tab 44 and the second tab 45 are respectively close to the two long sides 401, so that the conductive path between the second tab 45 and the third tab 54 can be effectively increased, the heat productivity of the second heating layer 53 is further increased, and the heating efficiency of the electric core assembly 1 is improved.

In the above embodiment in which the first tab 44 and the second tab 45 are disposed on the first electrode sheet 4, the third tab 54 and the fourth tab 55 are disposed on the first electrode sheet 4, and the above embodiment can be referred to, and will not be described again.

The structural form of the electric core assembly 1 is not specifically described in the embodiments of the present application, and the electric core assembly 1 provided by the present application includes, but is not limited to, the following embodiments.

In a possible implementation manner, referring to fig. 35, the present embodiment provides a winding type cell structure. The electrode core assembly 1 further comprises a diaphragm 7 which is stacked between the first electrode plate 4 and the second electrode plate 5. The first electrode sheet 4, the diaphragm 7 and the second electrode sheet 5 are wound together to form the electrode assembly 1. The first electrode sheet 4, the second electrode sheet 5 and the diaphragm 7 are wound and then encapsulated in the encapsulation layer 8. The long side 401 of the first electrode sheet 4 is a winding side. The first tab 44 and the second tab 45 are located on one long side 401 and are adjacent to the two short sides 402, respectively. Further, the first tab 44 and the second tab 45 may be proximate to the seal of the encapsulation layer 8. The third tab 54 and the fourth tab 55 are located at the winding edge of the second electrode sheet 5 and close to the seal of the encapsulation layer 8. In this way, the first tab 44, the second tab 45, the third tab 54 and the fourth tab 55 can be connected to the protection circuit 3 by short electrical connection lines, reducing the line length inside the electrical core assembly 1.

Referring to fig. 36, in another possible implementation, the present embodiment provides a laminated cell structure. The electric core assembly 1 is provided with a plurality of first electrode plates 4, a plurality of first electrode tabs 44 and at least one second electrode tab 45. The plurality of first electrode sheets 4 are stacked and spaced apart from each other. Each first tab 44 is connected to each first electrode sheet 4. A plurality of first tabs 44 are connected in parallel to form a positive tab of the core assembly 1.

Referring to fig. 36, the battery module 1 is provided with a plurality of second electrode plates 5 and a plurality of third electrode tabs 54. Each second electrode sheet 5 is provided between two adjacent first electrode sheets 4. The electric core assembly 1 further comprises a plurality of diaphragms 7, and one diaphragm 7 is arranged between every two adjacent first electrode plates 4 and second electrode plates 5. Each third tab 54 is correspondingly connected with each second electrode sheet 5. A plurality of third tabs 54 are connected in parallel to form the negative tab of the cartridge assembly 1. Alternatively, referring to fig. 36, the number of the second pole ears 45 is plural. The plurality of second pole pieces 45 are connected in parallel. With reference to the above embodiment, the plurality of second tabs 45 are connected in parallel and then connected to the second conductive terminal 92 through the first switch 9301, and the plurality of first tabs 44 are connected in parallel and then connected to the first conductive terminal 91 through the third switch 9303. When the control unit 93 controls the first switch 9301 to be turned on, the second switch 9302 to be turned off, the third switch 9303 to be turned on and the fourth switch 9304 to be turned off, the first heating layers 43 of the plurality of first electrode sheets 4 are heated after being turned on to increase the temperature of the electrode assembly 1.

Alternatively, referring to fig. 37, the number of the second pole ears 45 is one. One second tab 45 is provided on any one of the plurality of first electrode pads 4. In other words, one of the first electrode tabs 4 is provided with a first tab 44 and a second tab 45. The control unit 93 controls the first switch 9301 to be turned on, the second switch 9302 to be turned off, the third switch 9303 to be turned on and the fourth switch 9304 to be turned off, the current flows through the first heating layer 43 of one of the first electrode pieces 4, the first heating layer 43 of the first electrode piece 4 generates heat, and compared with the heat generated by a plurality of first electrode pieces, the first electrode piece 4 provided by the present embodiment generates heat by a single sheet, the internal resistance of the single electrode piece is greater than the internal resistance of the sub-electrode pieces connected in parallel by the plurality of first electrode pieces 4, so that the heat generated by the single sub-electrode piece is greater than the heat generated by the electrode pieces connected in parallel by the plurality of first electrode pieces 4, and further faster temperature rise is realized.

Alternatively, referring to fig. 38, the number of the second pole ears 45 is plural. The first switch 9301 includes a plurality of sub-switches 9300. Each sub-switch 9300 is connected to a second pole ear 45 and a second conductive terminal 92. The sub switch 9300 is used for receiving the control signal and is turned on or off under the action of the control signal. By controlling the on/off of the plurality of sub-switches 9300, the number of the first electrode plates 4 connected between the first conductive end 91 and the second conductive end 92 when the electric core assembly 1 is self-heated can be controlled, so that the self-heating internal resistance of the electric core assembly 1 is controlled, and the self-heating temperature rise speed of the electric core assembly 1 is adjusted.

Referring to fig. 39, in another embodiment, substantially the same as the embodiment shown in fig. 36, except that a fifth switch 9305 is disposed in two adjacent first electrode sheets 4, one end of the fifth switch 9305 is connected to the second tab 45 of one of the first electrode sheets 4, and the other end is connected to the first tab 44 of the other electrode sheet. The fifth switch 9305 is used to control the first tab 44 and the second tab 45 of two adjacent first electrode slices 4 to be connected, and the fifth switch 9305 is further connected to the control circuit 930 to receive the control signal of the control circuit 930. When the control unit 93 receives a control signal, the fifth switches 9305 between the first electrode plates 4 respectively connect the adjacent first tab 44 and second tab 45, so that the first electrode plates 4 are connected in series, the first tab 44 of the first electrode plate 4 at the head end is connected to the first conductive end 91 through the third switch 9303 and the second tab 45 of the first electrode plate 4 at the tail end is connected to the second conductive end 92 through the first switch 9301, so that the first heating layers 43 of the first electrode plates 4 are sequentially connected in series and then connected to the first conductive end 91 and the second conductive end 92.

Like this, the first zone of heating 43 of a plurality of first electrode slices 4 is established ties and is generated heat, for one first zone of heating 43 or a plurality of parallelly connected first zone of heating 43 generate heat, the internal resistance that a plurality of first zone of heating 43 establish ties that this embodiment provided is bigger for the efficiency of the self-heating of electric core subassembly 1 is higher, and the intensification is faster.

For the structural improvement that the first heating layer 43 of the first electrode plate 4 is connected to the power supply 200 through the first conductive end 91 and the second conductive end 92, the structural improvement that the second heating layer 53 of the second electrode plate 5 is connected to the power supply 200 through the first conductive end 91 and the second conductive end 92 can refer to the structural improvement of the first heating layer 43 of the first electrode plate 4, and is not described herein again.

The electric core assembly 1 further comprises a heating element. The heating member is connected between the second tab 45 and the first switching unit 931. The heating element may be a material having a good heating effect in a power-on state, such as a metal heating wire, graphene, a positive temperature coefficient thermistor (PTC), and the like.

Through addding the heating member, when the first zone of heating 43 self-heating of the first electrode slice 4 of the control unit 93 control, the heating member circular telegram, so, can be so that the first zone of heating 43 series connection of heating member and second electrode slice 5 generates heat, has further improved the rate of temperature rise of electric core subassembly 1 for the time that the battery is full of electricity.

Alternatively, the number of the cell assembly 1 in the electronic device 100 provided by the present application may be one or more. When the number of the electric core assembly 1 is plural, the electronic device 100 may include first the electric core assembly 1 and second the electric core assembly 1, first the electric core assembly 1 and second the electric core assembly 1 may be charged each other or independently charged from the external power source 200.

The charging method of the electric core assembly 1 provided by the embodiment of the present application includes, but is not limited to, the following embodiments.

In a first alternative embodiment, referring to fig. 40, the electronic device 100 includes a first electric core assembly 101 and a second electric core assembly 102. Firstly, the positive pole lug of the battery pack assembly 101 is connected with the second positive pole lug of the battery pack assembly 1 through a switch. Firstly, the negative pole lug of the battery pack assembly 101 is connected with the second negative pole lug of the battery pack assembly 1 through a switch. The first electric core assembly 101 and the second electric core assembly 102 can work simultaneously or in a time-sharing manner. When the temperature of the first electric core assembly 101 is too low, the second electric core assembly 102 can charge the first electric core assembly 101. Similarly, when the temperature of the second electric core assembly 102 is too low, the first electric core assembly 101 can charge the second electric core assembly 102. Therefore, the temperature of the first electric core assembly 101 and the temperature of the second electric core assembly 102 can be increased, the temperature of the first electric core assembly 101 and the second electric core assembly 102 is increased to be higher than the normal charging temperature, and the problem that the electronic device 100 cannot be normally charged at the temperature lower than the normal charging temperature is effectively solved.

It is understood that the above description of any one embodiment of the structure of the electric core assembly 1 can be incorporated into the present embodiment, when the first electric core assembly 101 needs to be charged, the positive pole of the second electric core assembly 102 corresponds to the second output end 220 of the power supply 200 in the above embodiment, and the negative pole of the second electric core assembly 102 corresponds to the first output end 210 of the power supply 200 in the above embodiment, so that the second electric core assembly 102 charges the first electric core assembly 101.

Of course, the number of the core assembly 1 is not limited in this embodiment.

This embodiment is through setting up a plurality ofly electricity core subassembly 1 to it is a plurality of to make can charge each other between the electricity core subassembly 1, thereby need not to be right under the condition of external power supply 200 electricity core subassembly 1 charges, improves discharge performance at low temperature of electricity core subassembly 1.

In a second alternative embodiment, the electric core assembly 1 can be electrically connected to an external power source 200 through an electric connection wire. This embodiment may refer to the above detailed description in describing the electric core assembly 1, and will not be described herein.

In a third alternative embodiment, referring to fig. 41, the battery module 1 may also be charged by an external wireless charger in a wireless charging manner.

Specifically, the electronic device 100 may include a wireless charging coil. The above description of any one embodiment of the structure of the battery module 1 can be incorporated into this embodiment, wherein one end of the wireless charging coil can be equivalent to the first output end 210 of the power supply 200 in the above embodiment, and the other end of the wireless charging coil can be equivalent to the second output end 220 of the power supply 200 in the above embodiment, so as to charge the battery module 1.

In the embodiment of the present application, a mode that the battery pack 1 is electrically connected to the external power supply 200 through an electrical connection line is taken as an example for explanation, and a person skilled in the art can apply the inventive concept of the present application to an application scenario that the battery pack 1 is wirelessly charged or the battery packs 1 are mutually charged.

It should be noted that, in the present application, the connection between the circuit of the electronic device and the electronic device, and the connection between the electronic device and the electronic device can be conducted when the electronic device is powered on, that is, they are in an electrical connection relationship. The circuit of the electronic device includes the charging circuit 60, the protection circuit 3, and the like. The electronic device of the electronic apparatus 100 includes a charging interface 50, the battery assembly 10, a charging terminal, an electrode, a current collector, a positive electrode material, a negative electrode material, a switch unit, a switch, and the like.

The electronic device 10 may be a computing device such as a laptop computer, a computer monitor containing an embedded computer, a tablet computer, a cellular telephone, a media player, or other handheld or portable electronic devices, smaller devices such as a wrist-watch device, a hanging device, a headset or earpiece device, a device embedded in eyeglasses, or other device worn on the head of a user, or other wearable or miniature devices, a television, a computer display not containing an embedded computer, a gaming device, a navigation device, an embedded system such as a system in which an electronic device with a display is installed in a kiosk or automobile, a device that implements the functionality of two or more of these devices, or other electronic devices. In an exemplary configuration of the present application, the electronic device is a portable device, such as a cellular phone, media player, tablet, or other portable device with a battery. It should be noted that fig. 1 is only an exemplary example.

The foregoing is a partial description of the present application, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations are also regarded as the protection scope of the present application.

Claims

1. An electrode sheet, characterized in that, the electrode sheet includes the mass flow body and with the zone of heating of mass flow body switch-on, the zone of heating is used for receiving electric current and producing heat from the power.

2. The electrode sheet of claim 1, wherein the electrode sheet is provided with two layers of the current collectors, and the heating layer is provided between the two layers of the current collectors.

3. An electrode sheet as defined in claim 2, wherein a plurality of the heating layers are disposed between two of the current collectors, the plurality of heating layers being spaced apart, wherein a portion or all of the heating layers receive current and generate heat.

4. An electrode sheet as defined in claim 1, wherein the electrode sheet is provided with a layer of the current collector and a layer of the heating layer, the layer of the heating layer being stacked with the layer of the current collector.

5. The electrode sheet of claim 1, wherein the electrode sheet is provided with a layer of the current collector and a layer of the heating layer, the heating layer being disposed within the current collector.

6. The electrode sheet according to any one of claims 1 to 5, wherein the surface of the current collector facing away from the heating layer is provided with an active material layer.

7. The electrode sheet according to claim 6, wherein an orthographic projection of the active material layer on a face of the heating layer facing the active material layer is on the heating layer.

8. The electrode sheet according to any one of claims 1 to 5, wherein the heating layer is attached to the current collector.

9. The electrode sheet according to any one of claims 1 to 5, wherein the heating layer is spaced from the current collector, and a heat conductive layer is disposed between the heating layer and the current collector, and is configured to transmit current from the current collector to the heating layer or from the heating layer to the current collector, and to uniformly transfer heat from the heating layer to the current collector.

10. The electrode sheet according to any one of claims 1 to 5, wherein the resistance of the heating layer is greater than the resistance of the current collector.

11. An electric core assembly, characterized in that the electric core assembly comprises the electrode plate of any one of claims 1 to 10.

12. An electric core assembly, characterized in that, the electric core assembly includes:

13. The current core assembly of claim 12, wherein said second electrode sheet is provided with a second heating layer in communication with said second current collector;

the control unit is also electrically connected with the second heating layer;

when the control unit receives a third control signal, the control unit enables the first conductive end to be conducted with the second heating layer and disconnected with the first current collector, and enables the second conductive end to be conducted with the second current collector and disconnected with the first heating layer.

14. The current core assembly of claim 13, wherein when said control unit receives a fourth control signal, said control unit communicates said first conductive terminal with said first current collector and said second heating layer, and communicates said second conductive terminal with said first heating layer and said second current collector.

15. The electric core assembly according to claim 13, wherein the electric core assembly comprises a first tab connected with the first current collector, and a second tab connected with the first current collector or/and the first heating layer; the electric core subassembly still include with the third utmost point ear that the second mass flow body is connected, the control unit electricity is connected first utmost point ear, second utmost point ear and third utmost point ear, with control first utmost point ear with first electrically conductive end disconnection or switch on, and control the second utmost point ear with the second electrically conductive end disconnection or switch on, and control the second electrically conductive end with the third utmost point ear disconnection or switch on.

16. The electric core assembly according to claim 15, wherein the electric core assembly further comprises a fourth tab connected to the second current collector or/and the second heating layer, and the control unit is further configured to control the fourth tab to be disconnected or connected to the first conductive terminal.

17. The die assembly according to claim 16, wherein the control unit is provided with four switches, one ends of the four switches are respectively connected with the first tab, the second tab, the third tab and the fourth tab, wherein the other ends of the two switches connecting the first tab and the fourth tab are both connected with the first conductive end, and wherein the other ends of the two switches connecting the second tab and the third tab are both connected with the second conductive end.

18. The electric core assembly according to any one of claims 12 to 17, further comprising a temperature sensor connected to the control unit, wherein the temperature sensor is configured to send a first control signal to the control unit when detecting that the temperature of the electric core assembly is at a first preset temperature threshold, and send a second control signal to the control unit when detecting that the temperature of the electric core assembly is at a second preset temperature threshold.

19. The electrode assembly according to any one of claims 12 to 17, wherein the first electrode sheet is provided with a first active material layer on a surface of the first current collector facing away from the first heating layer.

20. The electrode assembly according to any one of claims 13 to 17, wherein the second electrode sheet is provided with a second active material layer on a surface of the second current collector facing away from the second heating layer.

21. The electric core assembly according to any one of claims 12 to 17, further comprising a separator disposed between the first electrode sheet and the second electrode sheet, and an encapsulation layer covering the first electrode sheet, the second electrode sheet, and the separator.

22. The electric core assembly of claim 21, wherein said first electrode sheet, said separator and said second electrode sheet are collectively wound and encapsulated in said encapsulation layer, and said control unit electrically connects a winding edge of said first electrode sheet and a winding edge of said second electrode sheet.

23. The electric core assembly of claim 21, wherein a plurality of the first electrode plates, a plurality of the second electrode plates and at least one of the separators are arranged on the electric core assembly, the plurality of the first electrode plates and the plurality of the second electrode plates are alternately stacked and then encapsulated in the encapsulation layer, each of the separators is arranged between the adjacent first electrode plates and the adjacent second electrode plates, and when the control unit receives a control signal, the control unit controls the first current collectors of the plurality of the first electrode plates to be connected in series or/and in parallel to the first conductive terminal and the second current collectors of the plurality of the second electrode plates to be connected in series or/and in parallel to the second conductive terminal.

24. A battery pack, characterized in that the battery pack comprises an electric core assembly according to any one of claims 11 to 23.

25. An electronic device comprising the battery assembly of claim 24, the battery assembly being connected to the power source by an electrical connection line; or the battery pack is connected with the power supply in a wireless charging mode.

26. An electronic device comprising the battery assembly of claim 24, wherein the battery assembly is a first battery assembly, and further comprising a second battery assembly, wherein the second battery assembly is the power source.