WO2022227821A1

WO2022227821A1 - Battery assembly and control method therefor, and electronic device

Info

Publication number: WO2022227821A1
Application number: PCT/CN2022/077186
Authority: WO
Inventors: 谢红斌
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-04-27
Filing date: 2022-02-22
Publication date: 2022-11-03
Also published as: CN113178612A; CN113178612B

Abstract

A battery assembly, comprising a first electrode plate (110), a first separator (120), a reference electrode plate (130), a second separator (140), and a second electrode plate (150) which are sequentially stacked, wherein a first tab (111) is provided on one side of the first electrode plate (110), and a second tab (151) is provided on one side of the second electrode plate (150); the reference electrode plate (130) has a first reference end (131) and a second reference end (133); when the first reference end (131) and the second reference end (133) are electrically connected to a positive end and a negative end of a power supply unit, respectively to form a heating circuit, the battery assembly is in a heating mode such that the reference electrode plate (130) generates heat; when one of the first reference end (131) and the second reference end (133) is electrically connected to a first end of an acquisition unit and one of the first tab (111) and the second tab (151) is electrically connected to a second end of the acquisition unit to form a test loop, the battery assembly is in a test mode to detect an electrical parameter of the battery assembly.

Description

Battery pack and its control method and electronic device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application with the application number 2021104575243 and the invention titled "Battery Component and Its Control Method and Electronic Device" filed with the China Patent Office on April 27, 2021, the entire contents of which are incorporated herein by reference middle.

technical field

The present application relates to the technical field of charge and discharge, and in particular, to a battery assembly, a control method thereof, and an electronic device.

Background technique

The statements herein merely provide background information related to the present application and do not necessarily constitute prior exemplary art.

With the development of science and technology, more and more functions are supported by various electronic devices, and more and more functions put forward higher requirements on the power of electronic devices. Mainstream electronic devices (for example, mobile phones) currently on the market use batteries, such as lithium-ion batteries, for power supply. The charging rate of the battery is affected by the temperature of the battery to a certain extent, for example, the charging efficiency of the battery in a low temperature environment is low.

In order to improve the low temperature performance of the battery, there are new materials for the positive and negative electrodes, optimization of the electrolyte formula, and built-in heating materials inside the battery. With the pursuit of light and thin electronic devices, how to reduce the overall volume of electronic devices is also a research focus of technicians. Therefore, how to improve the low-temperature performance of the battery and reduce the overall volume of the electronic device has become a technical problem to be solved.

SUMMARY OF THE INVENTION

According to various embodiments of the present application, a battery assembly and an electronic device are provided.

A battery assembly, comprising: a first pole piece, a first membrane, a reference electrode piece, a second membrane and a second pole piece that are stacked in sequence, wherein one side of the first pole piece has a first pole lug , one side of the second pole piece has a second tab; the reference electrode piece has a first reference end and a second reference end; wherein,

When the first reference terminal and the second reference terminal are respectively electrically connected to the positive terminal and the negative terminal of the power supply unit to form a heating circuit, the battery assembly is in a heating mode to make the reference electrode sheet generating heat to heat the battery assembly; wherein the power supply unit is used to provide electrical energy for the reference electrode;

When one of the first reference end and the second reference end is used to electrically connect the first end of the acquisition unit, one of the first tab and the second tab is used to electrically connect the When the second end of the unit is collected to form a test loop, the battery assembly is in a test mode, wherein the collection unit is used to detect electrical parameters of the battery assembly.

An electronic device comprising:

the aforementioned battery pack;

a collection unit, the first end of the collection unit is electrically connected to one of the first reference end and the second reference end, and the second end of the collection unit is electrically connected to the first tab and the second reference end An electrical connection in the diode tab for detecting electrical parameters of the battery assembly.

The above-mentioned battery assembly and electronic device include a first pole piece, a first separator, a reference electrode piece, a second separator and a second pole piece that are stacked in sequence, wherein one side of the first pole piece has a first pole piece ear, one side of the second pole piece has a second pole ear; the reference electrode piece has a first reference end and a second reference end, when the heating circuit of the reference electrode piece is energized, the battery When the component is in the heating mode, the battery component can be heated to increase the temperature of the battery component. When the test circuit of the reference electrode sheet is turned on, the battery component is in the test mode, which can realize the detection of the electrical parameters of the battery component. Obviously, the battery assembly provided by the embodiments of the present application, based on the reference electrode sheet, not only has the function of heating the battery assembly, but also has the function of detecting the electrical parameters of the battery assembly, and will not increase the function of the battery assembly without additionally increasing the function of the battery assembly. The volume of the battery assembly promotes the miniaturization of the battery assembly.

A control method for a battery assembly, wherein the battery assembly comprises: a first pole piece, a first diaphragm, a reference electrode piece, a second diaphragm and a second pole piece that are stacked in sequence, wherein the first pole piece One side of the sheet has a first tab, and one side of the second pole sheet has a second tab; the reference electrode sheet has a first reference end and a second reference end; wherein, the method includes :

detecting temperature information of the battery assembly;

The heating circuit of the battery assembly is controlled to be turned on according to the temperature information, so that the reference electrode sheet generates heat, wherein the heating circuit transmits the heating electrical signal output by any terminal of the power supply unit to the reference electrode sheet. Describe the circuit of the reference electrode sheet;

Control the conduction of the test branch of the battery assembly according to the temperature information to detect the electrical parameters of the battery assembly, wherein the test branch is any reference end and any pole of the reference electrode sheet branch between the ears.

The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below. Other features, objects and advantages of the present application will become apparent from the description, drawings and claims.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

1 is a schematic structural diagram of a battery assembly in one embodiment;

2 is a schematic diagram of a circuit structure of a battery assembly in one embodiment;

3 is a schematic diagram of a circuit structure of a battery assembly in a first test mode in one embodiment;

4 is a schematic diagram of a circuit structure of a battery assembly in a second test mode in one embodiment;

5 is a schematic diagram of a circuit structure of a battery assembly in a third test mode in one embodiment;

6 is a schematic diagram of a circuit structure of a battery assembly in a heating mode in one embodiment;

7 is a schematic diagram of a circuit structure of a battery assembly in a heating mode in another embodiment;

8 is a schematic circuit diagram of a battery assembly in another embodiment;

FIG. 9 is a schematic structural diagram of a battery assembly including a casing in one embodiment;

10 is a schematic circuit diagram of a battery assembly in yet another embodiment;

11 is a schematic circuit diagram of a battery assembly in yet another embodiment;

12 is a schematic flowchart of a control method of a battery assembly in one embodiment;

FIG. 13 is a schematic structural diagram of an electronic device in one embodiment.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

It will be understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, a first solder joint could be referred to as a second solder joint, and, similarly, a second solder joint could be referred to as a first solder joint, without departing from the scope of this application. Both the first solder joint and the second solder joint are solder joints, but they are not the same solder joint.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless expressly and specifically defined otherwise. In the description of this application, "several" means at least one, such as one, two, etc., unless expressly and specifically defined otherwise.

A battery assembly provided by the embodiments of the present application. As shown in FIG. 1 , in one embodiment, the battery assembly includes: a first pole piece 110 , a first separator 120 , a reference electrode piece 130 , a second separator 140 and a second pole piece 150 , which are sequentially stacked. The polarities of the first pole piece 110 and the second pole piece 150 are opposite, for example, the first pole piece 110 is a positive pole piece, the second pole piece 150 is a negative pole piece, or, the first pole piece 110 is a negative pole piece, and the first pole piece 110 is a negative pole piece, and the second pole piece 150 is a negative pole piece The diode sheet 150 is a positive electrode sheet. The positive electrode sheet includes a positive electrode current collector (eg, aluminum foil) and a positive electrode active layer coated on the positive electrode current collector. Specifically, the material of the positive active layer may be at least one of lithium cobaltate, lithium manganate, lithium nickelate, lithium iron phosphate, lithium manganese phosphate, lithium manganese iron phosphate, lithium-rich manganese material and ternary material. The negative electrode sheet includes a negative electrode current collector (eg, copper foil) and a negative electrode active layer coated on the negative electrode current collector. Specifically, the material of the negative electrode active layer can be at least one of natural graphite, artificial graphite, soft carbon, hard carbon, mesocarbon microspheres, graphene, silicon carbide, silicon oxide and lithium titanate.

For convenience of description, in the embodiments of the present application, the first pole piece 110 is a positive electrode piece and the second pole piece 150 is a negative electrode piece as an example for description.

As shown in FIG. 2 , one side of the first pole piece 110 has first pole tabs 111 , and one side of the second pole piece 150 has second pole tabs 151 . The polarities of the first tab 111 and the first pole piece 110 are the same, for example, the first tab 111 is a positive tab. Specifically, the positive electrode ear may be one of an aluminum electrode lug with black glue, an aluminum electrode lug with gray glue, an aluminum electrode lug with yellow glue, and an aluminum electrode lug with white glue. The polarity of the second tab 151 is the same as that of the second pole piece 150 , for example, the second tab 151 is a negative tab. Specifically, the negative electrode lug can be one of a nickel lug with black glue, a nickel lug with gray glue, a nickel lug with yellow glue, a nickel lug with white glue, and a nickel-plated copper lug. The positive tab is electrically connected to the first tab 111, and the negative tab is electrically connected to the second pole piece 150. The connection methods include but are not limited to integral molding, welding, and conductive adhesive bonding.

The reference electrode sheet 130 includes a metal layer and a lithium ion layer disposed on the metal layer, wherein the metal layer is a metal layer or a metal alloy layer. Specifically, the material of the metal layer includes at least one of aluminum, copper, nickel, copper, cobalt, tungsten, tin, lead, iron, silver, gold, platinum and alloys thereof. The more types of metals in the material of the metal layer, the higher the internal resistance of the metal layer. In the embodiments of the present application, the metal layer may be a pure metal layer or a metal alloy layer. The lithium ion layer can be compounded with the metal layer by at least one of coating, calendering, rolling, bonding, evaporation, vapor deposition, chemical deposition, magnetron sputtering, chemical plating, and electroplating to form a parameter than the electrode sheet 130 .

Further, the shape of the reference electrode piece 130 may be a rectangle, a loop shape, or a special shape, but the reference electrode piece 130 is an integrated pole piece, and the entire area of the reference electrode piece 130 is in a connected state. It should be noted that, in this embodiment of the present application, the shape of the reference electrode piece may be the same as the shape of the first pole piece 110 and the second pole piece 150 , or may be the same as the shape of the first pole piece 110 and the second pole piece 150 . different shapes. Exemplarily, the first pole piece 110 , the second pole piece 150 , and the reference electrode piece 130 have the same shape and are all rectangular.

Further, the thickness of the metal layer in the reference electrode sheet 130 is 0.1 μm˜40 μm, and the thickness of the lithium ion layer is 0.01 μm˜10 μm. By setting the thicknesses of the metal layer and the lithium ion layer in the reference electrode sheet 130 within their corresponding exemplary ranges, the service life of the battery assembly can be ensured on the premise of reducing the thickness of the entire battery assembly.

The reference electrode sheet 130 has a first reference end 131 and a second reference end 133 , wherein the first reference end 131 and the second reference end 133 are respectively electrically connected to the reference electrode sheet 130 . The connection methods include, but are not limited to, integral molding, welding, and conductive adhesive bonding. Further, the first reference end 131 and the second reference end 133 may be arranged on the same side of the reference electrode sheet 130, or may be arranged at different sides of the reference electrode sheet. The first reference terminal 131 and the second reference terminal 133 may be respectively aluminum terminals with black glue, aluminum terminals with grey glue, aluminum terminals with yellow glue, aluminum terminals with white glue, nickel terminals with black glue, nickel with grey glue One of the terminals, nickel terminals with yellow rubber, nickel terminals with white rubber, and nickel-plated copper terminals.

Please continue to refer to FIG. 1 , the first diaphragm 120 is disposed between the first pole piece 110 and the reference electrode piece 130 at intervals, and the second diaphragm 140 is disposed between the reference electrode piece 130 and the second pole piece 150 . The first diaphragm 120 and the second diaphragm 140 can each include an insulating material layer, and an electrolyte layer respectively disposed on opposite sides of the insulating material layer, wherein the insulating material layer is a specially shaped polymer film, and the The pore structure allows lithium ions to pass freely, but electrons cannot. Specifically, the insulating material layers can be made of different materials including but not limited to polypropylene (PP), polyethylene (PE), PE/PP/PE three-layer composite film, alumina ceramic-coated diaphragm, boehmite-coated diaphragm, Cellulose or non-woven membranes.

Please continue to refer to FIG. 1 , optionally, the battery assembly may further include a third diaphragm 160 disposed on the side of the first pole piece 110 away from the first diaphragm 120 , and a third diaphragm 160 disposed on the side of the second pole piece 150 away from the second diaphragm 140 The fourth diaphragm 170 is used to achieve isolation and protection of battery components.

In the embodiments of the present application, the battery assembly may be formed in a lamination type or a winding type. The battery assembly can be in the form of a column, a bag, an arc, a soft pack, a cylinder, a diamond column, or a special shape. In the embodiments of the present application, the shape and formation method of the battery assembly are not further limited.

When the first reference terminal 131 and the second reference terminal 133 are respectively used for correspondingly electrically connected to the positive terminal and the negative terminal of the power supply unit 20 to form a heating circuit, the battery assembly is in the heating mode, so that the reference electrode sheet 130 generates The heat heats the battery components. Specifically, the heating loop may be a loop formed by the power supply unit 20 , the first reference end 131 , the reference electrode sheet 130 , and the second reference end 133 . The power supply unit 20 is used to supply electrical energy to the reference electrode 130 . When a heating electrical signal (eg, heating current or applied voltage) provided by the power supply unit 20 flows through the heating circuit, the heating electrical signal will act on the reference electrode sheet 130 with internal resistance, so that the reference electrode sheet 130 generates heat to heat the first pole piece 110 and the second pole piece 150 . Specifically, the heating voltage provided by the power supply unit 20 may be the normal operating voltage of the battery assembly. Exemplarily, the heating voltage may be set in the range of 2-5V.

Since the reference electrode sheet 130 can generate heat under the action of the heating electrical signal, the battery assembly provided in this embodiment can be called a self-heating battery. In the embodiment of the present application, the reference electrode sheet 130 having the first reference terminal 131 and the second reference terminal 133 is provided, and the reference electrode sheet 130 is arranged on the first pole piece 110 and the second pole piece 150 In between, when the first reference terminal 131 or the second reference terminal 133 receives the heating electrical signal, the first pole piece 110 and the second pole piece 150 can be uniformly heated, and the heat generated by the reference electrode piece 130 It can be quickly conducted to the first pole piece 110 and the second pole piece 150 , which improves the heat conduction efficiency and increases the temperature of the battery assembly.

When one of the first reference terminal 131 and the second reference terminal 133 is used to electrically connect the first terminal of the acquisition unit 30 , one of the first tab 111 and the second tab 151 is used to electrically connect the acquisition unit 30 When the second end of the battery assembly is formed to form a test loop, the battery assembly is in the test mode to realize the detection of the electrical parameters of the battery assembly. Wherein, the collection unit 30 is used to detect the electrical parameters of the battery assembly. Specifically, the acquisition unit 30 may be a voltmeter, an ammeter, or the like. When the battery assembly is in the test mode, the reference electrode sheet can be equivalent to a zero potential electrode sheet. Based on the acquisition unit 30, electrical parameters of the battery assembly may be measured, and the electrical parameters may include negative electrode potential, positive electrode potential, impedance, and the like. Further, based on this electrical parameter, the internal electrochemical reactions of the battery components can also be analyzed and mastered, for example, the consumption of electrolytes existing in the battery components, the generation of solid electrolyte membrane (Solid Electrolyte Interphase, SEI), and the lithium evolution of the negative electrode, etc., to obtain the battery. The health state of the component.

Specifically, the test mode includes at least one of a first test mode, a second test mode, and a third test mode. As shown in FIG. 3 , when one of the first reference end 131 and the second reference end 133 can be electrically connected to the first end of the collection unit 30 and the first tab 111 can be electrically connected to the second end of the collection unit 30 , the battery assembly is in the first test mode, and the first voltage signal of the battery assembly, that is, the positive electrode potential, can be detected. As shown in FIG. 4 , when one of the first reference end 131 and the second reference end 133 can be electrically connected to the first end of the collection unit 30 and the second tab 151 can be electrically connected to the second end of the collection unit 30 , the battery assembly is in the second test mode, and the second voltage signal of the battery assembly, that is, the negative electrode potential, can be detected. As shown in FIG. 5 , one of the first reference end 131 and the second reference end 133 can be electrically connected to the first end of the first collection unit 310 , and the first tab 111 is electrically connected to the first end of the first collection unit 310 . Two terminals, one of the first reference terminal 131 and the second reference terminal 133 is also used to electrically connect the first terminal of the second acquisition unit 30 , and the second tab 151 is used to electrically connect to the first terminal of the second acquisition unit 320 When the two terminals are used, the battery assembly is in the third test mode, and the first voltage signal and the second voltage signal of the battery assembly can be detected.

It should be noted that, the heating mode and the testing mode of the battery assembly provided by the embodiments of the present application may be performed synchronously or asynchronously. If it is performed simultaneously, in the heating mode, the electrical parameters of the battery pack can also be detected; in the test mode, the reference electrode sheet can also be energized to heat the battery pack and increase the temperature of the battery pack . If performed asynchronously, only one of the heating mode and the test mode can be supported at the same time.

In the embodiment of the present application, the battery assembly includes a first pole piece 110 , a first separator 120 , a reference electrode piece 130 , a second separator 140 and a second pole piece 150 that are stacked in sequence, wherein the first pole piece 110 is One side has a first tab 111, and one side of the second pole piece 150 has a second tab 151; the reference electrode piece 130 has a first reference end 131 and a second reference end 133, when the reference electrode piece 130 When the heating circuit is energized and turned on, in order to realize the heating of the battery assembly to increase the temperature of the battery assembly, the acquisition unit 30 can also be electrically connected between any electrode lug and any reference terminal, and the reference electrode sheet When the test circuit of 130 is turned on, the battery assembly is in the test mode, which can realize the detection of the electrical parameters of the battery assembly. Obviously, the battery assembly provided by the embodiment of the present application, based on the reference electrode sheet 130, not only has the function of heating the battery assembly, but also has the function of detecting the electrical parameters of the battery assembly. Increase the volume of battery components and promote the miniaturization of battery components.

As shown in FIG. 6 , in one embodiment, the battery assembly itself can be used as the power supply unit 20 , wherein the first tab 111 is used as the positive terminal of the power supply unit 20 , and the second tab 151 can be used as the negative terminal of the power supply unit 20 . extreme. With the first reference terminal 131 electrically connected to one of the two tabs and the second reference terminal 133 connected to the other of the two tabs, the battery assembly is in a heating mode. Exemplarily, the first reference terminal 131 is electrically connected to the first tab 111 , and the second reference terminal 133 is electrically connected to the second tab 151 .

Specifically, when the battery assembly is used as the power supply unit 20, the internal resistance of the reference electrode sheet 130 in the battery assembly is greater than the preset threshold to ensure that the first reference terminal 131 is electrically connected to the first tab 111, and the second reference electrode 131 is electrically connected. When the ratio terminal 133 and the second tab 151 are electrically connected, the first tab 111 and the second tab 151 will not be short-circuited. Exemplarily, the material of the metal layer of the reference electrode sheet 130 includes a metal alloy material, so that the internal resistance of the reference electrode sheet 130 is greater than a preset threshold.

In the embodiment, the electric power of the battery assembly itself can be used to provide electric power for the reference electrode sheet, and then a heating electrical signal can be input to the first reference terminal 131, so that the reference electrode sheet 130 can generate heat, so as to improve the battery assembly. temperature. In addition, the use of the external power supply unit 20 to provide electric power can also be avoided, the volume of the battery assembly will not be increased, and the miniaturization of the battery assembly can be further promoted.

As shown in FIG. 7, in one embodiment, the battery assembly further includes a first switch K1. Wherein, the first switch K1 can be arranged in the heating circuit for turning on or off the heating circuit. Specifically, the first reference terminal 131 is electrically connected to one of the two tabs via the first switch K1 , and the second reference terminal 133 is connected to the other of the two tabs. Optionally, the first switch K1 may also be electrically connected between the second tab 151 and the second reference terminal 133 . When the first switch K1 is turned on, that is, the heating circuit is turned on, the electric energy of the battery assembly itself can be transmitted to the reference electrode sheet 130, so that the reference electrode sheet 130 can generate heat under the action of the heating electrical signal, so as to The first pole piece 110 and the second pole piece 150 are uniformly heated.

On the basis of the battery assembly shown in FIG. 7 , in one embodiment, the battery assembly includes a switch unit 180 , as shown in FIG. 8 , the switch unit 180 is arranged on the test branch for turning on or off The test branch where the test unit is located. Wherein, the test branch may be a branch between any pole tab and any degree of conductivity. Different test modes have different corresponding test branches. Specifically, the test branch may include a first test branch between the first tab 111 and the first reference terminal 131, a second test branch between the first tab 111 and the second reference terminal 133, A third test branch between the second tab 151 and the first reference terminal 131 , and a fourth test branch between the second tab 151 and the second reference terminal 133 . When the test branch where the test unit is located is turned on, the electrical parameters of the battery assembly can be detected correspondingly. Specifically, in different test modes, the number of switch units 180 and the test branch where the switch units 180 are located are also different.

In the case where one of the first reference terminal 131 and the second reference terminal 133 is used to electrically connect the first terminal of the acquisition unit 30, and the first tab 111 is connected to the second terminal of the acquisition unit 30 via the switch unit 180, The battery pack is in a first test mode to detect a first voltage signal of the battery pack. That is, the switch unit 180 may be disposed in the second test branch. Optionally, the switch unit 180 may also be arranged in the first test branch.

Please continue to refer to FIG. 8 , one of the first reference terminal 131 and the second reference terminal 133 is used to electrically connect the first terminal of the acquisition unit 30 , and the second tab 151 is connected to the acquisition unit 30 through the switch unit 180 . In the case of the second terminal, the battery pack is in the second test mode to detect the second voltage signal of the battery pack. That is, the switch unit 180 may be disposed in the fourth test branch.

Optionally, the switch unit 180 may also be arranged in the third test branch.

In one of the embodiments, the number of switch units 180 is two, which are respectively denoted as a first switch unit and a second switch unit. Specifically, when one of the first reference terminal 131 and the second reference terminal 133 is used to electrically connect to the first terminal of the first acquisition unit 310 , the first tab 111 is electrically connected to the acquisition unit 30 through the first switch unit. In the case of the second end of the battery pack, the battery pack is in a third test mode to detect the first voltage signal of the pack pack. That is, the first switch unit may be disposed in the second test branch. Optionally, the first switch unit may also be provided in the first test branch.

The other one of the first reference terminal 131 and the second reference terminal 133 is also used for electrically connecting the first terminal of the second collecting unit 320, and the second tab 151 is electrically connected to the second collecting unit 320 through the second switching unit. The second terminal of the battery pack is used to detect the second voltage signal of the battery pack. That is, the second switch unit may be disposed in the fourth test branch. Optionally, the second switch unit may also be arranged in the third test branch. Specifically, both the first switch unit and the second switch unit may be single-pole single-throw switches.

Further, the battery assembly further includes a control unit (not shown in the figure) connected to the first switch K1 and the switch unit 180 respectively. The control unit can control the first switch K1 to be turned on, and can correspondingly control the switch unit 180 to be turned off or turned on, so that the battery assembly is in the heating mode. The control unit can control the switch unit 180 to be turned on, and can correspondingly control the first switch K1 to be turned off or turned on, so that the battery assembly is in the test mode. It should be noted that in the heating mode, if the control unit further controls the switch unit 180 to be turned on, or, in different test modes, the control unit also controls the first switch K1 to be turned on, the heating mode and the test mode coexist.

In this embodiment, by arranging the first switch K1 , the switch unit 180 and the control unit in the battery assembly, the on-off states of the first switch K1 and the switch unit 180 can be controlled according to requirements, thereby realizing the switching between the heating mode and the test mode. The switching of the battery pack provides the flexibility of the heating function and detection function of the battery pack.

As shown in FIG. 9 , in one embodiment, the battery assembly further includes: a casing 100 and a first pole 101 and a second pole 102 disposed on the casing 100 . The first pole piece 110 , the first diaphragm 120 , the reference electrode piece 130 , the second diaphragm 140 and the second pole piece 150 are all built in the casing 100 .

The first pole 101 is a positive pole, and the second pole 102 is a negative pole, or, the first pole 101 is a negative pole, and the second pole 102 is a positive pole. The first pole 101 and the first pole tab 111 have the same polarity, and the second pole 102 and the second pole tab 151 have the same polarity. Optionally, the first pole 101 and the first pole 101 are disposed on the surface of the casing 100 at intervals and exist in a bare form.

Wherein, when the electronic component is used in an electronic device, the first pole 101 and the second pole 102 thereof can be connected to the charging interface of the electronic device, and can be used to receive external heating electrical signals. In the heating mode, the first reference terminal 131 is electrically connected to the first pole 101, and the second reference terminal 133 is connected to the second pole 102, so as to transmit the heating electrical signal to the reference electrode sheet 130, and the reference electrode The sheet 130 generates heat according to the heating electrical signal.

Further, the first pole 101 and the second pole 102 are also used for receiving external charging electrical signals and outputting charging electrical signals. The charging electrical signal may be at least one of a current signal and a voltage signal. The first pole 101 and the second pole 102 can receive the charging electrical signal and charge the battery assembly. Correspondingly, the first pole 101 and the second pole 102 can also output the electrical energy stored in the battery assembly to discharge the devices in the electronic device.

As shown in FIG. 10, in one embodiment, the battery assembly further includes: a second switch K2 and a third switch K3. The second switch K2 is electrically connected between the first reference terminal 131 and the first pole 101 , and the third switch K3 is electrically connected between the second tab 151 and the second pole 102 . Specifically, the first terminal of the second switch K2 is electrically connected to the first pole 101 and the first tab 111 respectively, the second terminal of the second switch K2 is electrically connected to the first reference terminal 131, and the third switch K3 is electrically connected to the first reference terminal 131. The first terminal is electrically connected to the second pole 102 and the second reference terminal 133 respectively, and the second terminal of the second switch K2 is electrically connected to the second tab 151 .

When the second switch K2 is turned on and the third switch K3 is turned off, the battery assembly is in the heating mode to transmit the heating electrical signal to the reference electrode sheet 130; when the second switch K2 is turned off and the third switch K3 is turned on In the case of being connected, the battery assembly is in the charging mode, so as to transmit the charging electrical signal to the first tab 111 and the second tab 151 to charge the battery assembly.

Specifically, the control unit of the battery assembly is also connected to the second switch K2 and the third switch K3. The control unit is used to control the second switch K2 to be turned on and the third switch K3 to be turned off, so as to turn on the first pole 101, the first reference terminal 131, the reference electrode sheet, the second reference terminal 133, the second The heating circuit formed by the pole 102 is used to make the battery assembly in the heating mode to transmit the external heating electrical signal to the reference electrode piece 130, so that the reference electrode piece 130 generates heat, which is the first pole piece 110 and the second pole piece. 150 heating to raise the temperature of the battery pack. The control unit is used to control the second switch K2 to be turned off and the third switch K3 to be turned on, thereby turning on the first pole 101 , the first tab 111 , the first pole piece 110 , the second pole piece 150 and the second pole The charging loop formed by the ear 151 and the second pole 102 makes the battery assembly in the charging mode, and charges the battery assembly based on the charging electrical signal received by the first pole 101 and the second pole 102 .

On the basis of the battery assembly shown in FIG. 10 , in one of the embodiments, the battery assembly may further include the switch unit 180 in any of the above embodiments. The control unit can turn on and off the second switch K2, the third switch K3 and the switch unit 180, so that the battery assembly is in a charging mode, a heating mode and different test modes, wherein the charging mode and each test mode can coexist, and the heating mode can coexist. Patterns and test patterns can also coexist.

As shown in FIG. 11 , in one embodiment, the battery assembly further includes a fourth switch K4 in addition to the second switch K2 and the third switch K3 . The fourth switch K4 is electrically connected between the third switch K3 and the second pole 102 . For the connection manner of the second switch K2 and the third switch K3, reference may be made to the foregoing embodiments, and details are not described herein again. In addition, the control unit may be connected to the second switch K2, the third switch K3, and the fourth switch K4, respectively, for controlling the on-off of the second switch K2, the third switch K3, and the fourth switch K4. Specifically, the heating mode of the battery assembly may include a first heating mode and a second heating mode. Specifically, when the second switch K2 is turned on, the third switch K3 is turned on, and the fourth switch K4 is turned off, the battery assembly is in the first heating mode, and the heating electrical signal generated by the battery assembly can be transmitted to the reference electrode Sheet 130. When the second switch K2 is turned on, the third switch K3 is turned off, and the fourth switch K4 is turned on, the battery assembly is in the second heating mode, and the heating electrical signal received by the first pole 101 can be transmitted to the reference electrode Sheet 130.

The control unit is used to control the second switch K2 to be turned on, the third switch K3 to be turned on, and the fourth switch K4 to be turned off, so as to turn on the first tab 111 , the first reference terminal 131 , the reference electrode piece 130 , and the third switch K4 . The first heating loop formed by the diode lugs 151 and the second reference terminal 133, so that the battery assembly is in the first heating mode, so as to transmit the heating electrical signal generated by the battery assembly itself to the reference electrode sheet 130, so that the reference electrode is in the first heating mode. The sheet 130 generates heat to heat the first pole piece 110 and the second pole piece 150 to increase the temperature of the battery assembly.

The control unit is used to control the second switch K2 to be turned on, the third switch K3 to be turned on, and the fourth switch K4 to be turned off, so as to turn on the first pole 101, the first reference terminal 131, the reference electrode, the second The second heating loop formed by the reference terminal 133 and the second pole 102, so that the battery assembly is in the second heating mode, so as to transmit the external heating electrical signal to the reference electrode sheet 130, so that the reference electrode sheet 130 generates heat, The first pole piece 110 and the second pole piece 150 are heated to increase the temperature of the battery assembly.

The control unit is used to control the second switch K2 to be turned off, the third switch K3 to be turned on, and the fourth switch K4 to be turned on, so as to turn on the first pole 101 , the first pole lug 111 , the first pole piece 110 , and the second pole piece 110 . The charging loop formed by the pole piece 150, the second pole lug 151, and the second pole 102, so that the battery assembly is in the charging mode, and based on the charging electrical signal received by the first pole 101 and the second pole 102, the battery component is Charge.

Specifically, the first switch K1 , the second switch K2 , the third switch K3 , the fourth switch K4 , and each switch unit 180 may be single-pole single-throw switches, or electronic switch tubes or other small switching devices. It should be noted that, in the embodiments of the present application, the switch types of the first switch K1 , the second switch K2 , the third switch K3 , the fourth switch K4 , and each switch unit 180 are not further limited.

In this embodiment, by arranging the second switch K2, the third switch K3, the fourth switch K4 and the control unit in the battery assembly, the second switch K2, the third switch K3 and the fourth switch K4 can be controlled according to actual requirements. The on-off state enables the battery assembly to switch between the charging mode and different heating modes, expands the function of the battery assembly, and improves the flexibility of switching between different functions.

On the basis of the battery assembly shown in FIG. 11 , in one of the embodiments, the battery assembly may further include the switch unit 180 in any of the above embodiments. The control unit can turn on and off the second switch K2, the third switch K3, the fourth switch K4 and the switch unit 180 to make the battery assembly in the first heating mode, the second heating mode, the charging mode or different test modes. Among them, the charging mode and each test mode may coexist, and each heating mode and each test mode may coexist.

In one of the embodiments, the battery assembly further includes a temperature detection unit (not shown in the figure). The temperature detection unit may be disposed in the casing 100 to detect the temperature information of at least one of the first pole piece 110 and the second pole piece 150, and then may detect the temperature information of the battery assembly. Specifically, the temperature detection unit may include a temperature sensor, and the temperature sensor may be disposed on the first pole piece 110 or the second pole piece 150 . It should be noted that, in the embodiments of the present application, the specific positions and numbers of the temperature sensors are not further limited.

The temperature detection unit is electrically connected to the control unit, and the control unit is used to control the on-off of the heating circuit according to the temperature information, so that the battery assembly is in the heating mode, that is, the heating electrical signal can be controlled to flow into the reference electrode sheet 130, so that the reference The specific electrode sheet 130 generates heat.

Specifically, the temperature detection unit may send the detected temperature information to the control unit. The control unit receives the temperature information, and controls the reference electrode sheet 130 to heat the battery assembly according to the temperature information. Further, the control unit can conduct the heating circuit of the reference electrode sheet 130 when the temperature information is in the low temperature range, so that the heating electrical signal is input to the reference electrode sheet 130, so that the reference electrode sheet 130 generates heat and heats the battery assembly . The control unit may also disconnect the heating circuit of the reference electrode sheet 130 when the temperature information of the battery assembly reaches the normal charging temperature range, so as to stop the reference electrode sheet 130 from heating the battery assembly. Specifically, the low temperature range may be a temperature range where the temperature is less than 10°C, and the normal charging temperature range may be a temperature range where the temperature is greater than or equal to 10°C and less than 45°C. When the temperature information is in the normal charging temperature range, the control unit can also conduct the charging circuit, so that the battery assembly is in a charging mode to charge the battery assembly.

Optionally, when the temperature information is in a low temperature range, the control unit can control the second switch K2 to be turned on, the third switch K3 to be turned on, and the fourth switch K4 to be turned off, and then the second heating circuit can be turned on, so that the battery assembly can be turned on. In the second heating mode, the external heating electrical signal is transmitted to the reference electrode sheet 130, so that the heating efficiency of the reference electrode sheet 130 is high, and the temperature of the battery assembly rises to the normal charging temperature range at an extremely fast speed. When the temperature of the battery assembly reaches the normal charging temperature range, the control unit can control the second switch K2 to be turned on, the third switch K3 to be turned on, and the fourth switch K4 to be turned off to turn on the first heating loop, so that the battery assembly itself generates The heating electrical signal is transmitted to the reference electrode sheet 130, so that the heating efficiency of the reference electrode sheet 130 is relatively slow, so that the temperature of the battery assembly is maintained in the normal charging temperature range.

In one embodiment, the control unit may also control different test paths to be turned on according to the temperature information when the battery assembly is in the charging mode or any heating mode, so that the battery assembly is in different test modes at the same time. Exemplarily, when the temperature information is located in the low temperature range, the third test path, or the fourth test path, can also be controlled to be turned on to detect the negative electrode voltage of the battery assembly, and then the negative electrode lithium precipitation state can be analyzed according to the negative electrode voltage to analyze. The health status of the battery components.

Further, the control unit can control the battery components to be in different test modes, and further analyze the health status of the battery components at different temperatures according to the detected electrical parameters, for example, the corresponding relationship between the consumption of the electrolyte inside and the temperature, the solid state. The corresponding relationship between the electrolyte membrane and the temperature, the corresponding relationship between the degree of lithium deposition in the negative electrode and the temperature, etc.

In the embodiment of the present application, the battery assembly can control at least one of the heating circuit, the charging circuit and the test branch to conduct conduction according to the detected temperature information, so that the battery assembly has the functions of heating, charging and electrical parameter detection. The functionality of the battery assembly is improved, the volume of the battery assembly is not increased while the function of the battery assembly is increased, and the miniaturization of the battery assembly is promoted. At the same time, switching between heating mode, charging mode and testing mode can also be realized, which provides the flexibility of switching the battery assembly between different modes.

The embodiment of the present application also provides a control method for a battery assembly, and the control method can be applied to the heating assembly in any of the foregoing embodiments. As shown in FIG. 12 , in one embodiment, the control method of the battery assembly includes steps 1202 to 1206 .

Step 1202, detecting temperature information of the battery assembly.

Step 1204, control the heating loop of the battery assembly to conduct according to the temperature information, so that the reference electrode sheet generates heat, wherein the heating loop is a support between any reference end of the reference electrode sheet and any extreme end of the power supply unit. road.

Specifically, when the detected temperature information of the battery assembly is in the low temperature range, the heating circuit of the battery assembly can be controlled to conduct correspondingly, so that the heating electrical signal is input to the reference electrode sheet 130, so that the reference electrode sheet 130 generates heat , to heat the battery pack. Specifically, the low temperature range may be a temperature range where the temperature is less than 10°C.

Further, when it is detected that the temperature information of the battery assembly is in the normal charging temperature range, the heating circuit of the corresponding control battery assembly can be disconnected to stop the reference electrode sheet 130 from heating the battery assembly. Specifically, the normal charging temperature range may be a temperature range where the temperature is greater than or equal to 10°C and less than 45°C.

Step 1206 , control the conduction of the test branch of the battery assembly according to the temperature information to detect the electrical parameters of the battery assembly, wherein the test branch is the branch between any reference end of the reference electrode sheet and any tab.

Specifically, when the test branch is turned on, the battery assembly is in the test mode. Specifically, the test mode may include a first test mode, a second test mode and a third test mode. Different test modes have different corresponding test branches. Specifically, the test branch may include a first test branch between the first tab 111 and the first reference terminal 131, a second test branch between the first tab 111 and the second reference terminal 133, A third test branch between the second tab 151 and the first reference terminal 131 , and a fourth test branch between the second tab 151 and the second reference terminal 133 .

Specifically, by controlling the conduction of the first test branch or the second test branch where the acquisition unit 30 is located, so that the battery assembly is in the first test mode, the positive voltage of the battery assembly can be detected. By controlling the third test branch or the fourth test branch where the acquisition unit 30 is located to be turned on, so that the battery assembly is in the second test mode, the negative voltage of the battery assembly can be detected. By controlling the first test branch and the third test branch where the acquisition unit 30 is located, so that the battery assembly is in the third test mode, the positive voltage and the negative voltage of the battery assembly can be detected.

Further, according to the detected electrical parameters (for example, the positive voltage and/or the negative voltage), the battery components can further analyze the health status of the battery components at different temperatures, for example, the internal electrolysis Liquid consumption, solid electrolyte membrane, degree of lithium deposition in the negative electrode, etc.

It should be noted that, step 1204 and step 1206 may be performed simultaneously, or may be performed in a time-sharing manner. When steps 1204 and 1206 are executed in time, the sequence of steps 1204 and 1206 may not be limited.

In this embodiment, based on the battery assembly in any of the foregoing embodiments, a control method for the battery assembly can be implemented, and the battery assembly can be controlled to enter the self-heating mode and/or the test mode according to the temperature information of the battery assembly. When the information is in the low temperature range, the heating circuit of the control battery assembly is turned on, so that the reference electrode sheet 130 of the battery assembly can generate heat, and then the battery assembly can be heated, so that the temperature of the battery assembly can be quickly raised to the normal charging temperature range, so that the Improve the charging rate of the battery pack. In addition, the method can also control the test path of the battery assembly, so that the battery assembly can be in different test modes, and realize the detection of the electrical parameters of the battery assembly, which can be used to analyze the health status of the battery assembly and expand the functionality of the battery assembly. .

In one of the embodiments, when the heating circuit is turned on, the battery assembly is in a heating mode, and the heating mode includes a first heating mode and a second heating mode. Different heating modes have different heating electrical signals input to the reference electrode sheet. Specifically, the heating electrical signal corresponding to the first heating mode is the power signal provided by the first pole piece 110 and the second pole piece 150 in the battery assembly, and the heating electrical signal corresponding to the second heating mode is the power signal provided by the external power supply unit 20 .

Further, controlling the conduction of the heating circuit of the battery assembly according to the temperature information includes: determining a target heating mode from the first heating mode and the second heating mode according to the temperature information, and turning on the target heating mode corresponding to the target heating mode according to the target heating mode Loop steps.

The battery assembly can pre-store the correspondence between the temperature information and the target heating mode. For example, when the temperature is in the low temperature range, its target heating mode can be the second heating mode; when the temperature is in the normal charging temperature range, its target heating mode Can be the second heating mode. Therefore, the battery assembly can determine the target heating mode according to the currently detected temperature information.

Based on the battery assembly shown in FIG. 11 , when the target heating mode is the second heating mode, the battery assembly can control the second switch K2 to be turned on, the third switch K3 to be turned on, and the fourth switch K4 to be turned off, and then the battery assembly can be turned on The second heating circuit corresponding to the second heating mode is used to transmit the external heating electrical signal to the reference electrode sheet 130, so that the heating efficiency of the reference electrode sheet 130 is high, and the temperature of the battery assembly rises to normal at an extremely fast speed charging temperature range.

When the target heating mode is the first heating mode, the battery assembly can control the second switch K2 to be turned on, the third switch K3 to be turned on, and the fourth switch K4 to be turned off, so as to turn on the first heating circuit corresponding to the first heating mode , so as to transmit the heating electrical signal generated by the battery assembly itself to the reference electrode sheet 130 , so that the heating efficiency of the reference electrode sheet 130 is relatively slow, so that the temperature of the battery assembly is maintained in the normal charging temperature range.

In this embodiment, the battery assembly can determine the target heating mode according to the current temperature information, so as to control the battery assembly to perform different self-heating modes. For example, in a low temperature state, the battery assembly can be controlled to enter the second heating mode, so that the temperature of the battery assembly can be raised to the normal charging temperature range at an extremely fast speed, thereby improving the electrochemical reaction speed inside the battery assembly, which can greatly increase the speed of the battery assembly. Increase the charging rate of the battery pack; if it is in the normal temperature charging range, the battery pack can be controlled to enter the first heating mode, so that the temperature of the battery pack is maintained in the normal charging temperature range to maintain the charging rate of the battery pack.

The embodiments of the present application also provide an electronic device. Wherein, the electronic device may be a smart terminal, a notebook computer, a drone, an e-book, a notebook computer, a tablet computer, a mobile phone, an electronic cigarette, a smart electronic device (such as a watch, a wristband, a smart glasses, a cleaning robot, etc.), And other electronic products (eg, wireless earphones, Bluetooth speakers, electric toothbrushes, rechargeable wireless mice, etc.).

As shown in FIG. 13 , in the embodiment of the present application, the electronic device 10 is a mobile phone as an example for description. Those skilled in the art can easily think of structural design of other rechargeable devices according to the technical means of this embodiment, so as to realize improved charging efficiency.

The electronic device 10 includes a display module (not shown), a frame and a battery cover 11 . The display module includes a display screen. The display screen can be an OLED (Organic Light-Emitting Diode) screen or an LCD (Liquid Crystal Display, liquid crystal display) screen. The display screen can be used to display information and provide users with user-interface. The frame can be made of metal materials such as aluminum alloy or magnesium alloy or stainless steel, and the frame is arranged on the periphery of the display module to support and protect the display module. The battery cover 11 is disposed on the side facing away from the displayable area of the display screen and is connected with the frame. Further, an installation space may be formed between the battery cover 11 and the display screen 111 for installing electronic components such as the battery assembly 10 and the motherboard in any of the foregoing embodiments of the electronic device 10 .

Specifically, the first pole and the second pole of the battery assembly 10 can be set in the flexible circuit board 12, and are electrically connected to the battery docking interface on the main board through the lead interface of the flexible circuit board 12, and then electrically connected to the charging interface of the main board. 13 or discharge the devices in the electronic device 10, for example, electronic components such as processors, storage units, power management modules, baseband chips, and the like.

In addition, the battery assembly 10 can also be used to receive a charging signal from an external charging device (eg, an adapter, a power bank, etc.) to charge the battery assembly 10, and at the same time, the battery assembly 10 can also be based on the heating power of the internal or external charging device. The signal and the electrical energy of the battery assembly 10 itself to cause the reference electrode sheet in the battery assembly 10 to generate heat.

Further, the electronic device 10 further includes a collection unit. Wherein, the first end of the collection unit is electrically connected to one of the first reference end and the second reference end, and the second end of the collection unit is electrically connected to one of the first tab and the second tab, for Detect the electrical parameters of the battery pack. Obviously, the electronic device provided in the embodiment of the present application, based on the reference electrode sheet of the battery assembly 10, has the function of heating the battery assembly 10, and also has the function of detecting the electrical parameters of the battery assembly. At the same time, the volume of the battery assembly is not increased, and the miniaturization of the battery assembly 10 is promoted, thereby saving space for expanding other functional modules for the electronic device 10 .

The above examples only represent several embodiments of the present application, and the descriptions thereof are relatively specific and detailed, but should not be construed as a limitation on the scope of the patent of the present application. It should be noted that, for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the appended claims.

Claims

A battery assembly, comprising: a first pole piece, a first membrane, a reference electrode piece, a second membrane and a second pole piece that are stacked in sequence, wherein one side of the first pole piece has a first pole lug , one side of the second pole piece has a second tab; the reference electrode piece has a first reference end and a second reference end; wherein,

When the first reference terminal and the second reference terminal are respectively electrically connected to the positive terminal and the negative terminal of the power supply unit to form a heating circuit, the battery assembly is in a heating mode, so that the reference electrode is in a heating mode. The sheet generates heat to heat the battery assembly; wherein, the power supply unit is used to provide electrical energy for the reference electrode;

When one of the first reference terminal and the second reference terminal is electrically connected to the first terminal of the acquisition unit, one of the first tab and the second tab is electrically connected to the first terminal of the acquisition unit. When two terminals are formed to form a test loop, the battery assembly is in a test mode, wherein the acquisition unit is used to detect electrical parameters of the battery assembly.
The battery assembly according to claim 1, wherein the battery assembly is used as the power supply unit, wherein the first tab and the second tab are used as the positive terminal and the negative terminal of the power supply unit, respectively. When the first reference terminal is electrically connected to one of the two tabs, and the second reference terminal is connected to the other of the two tabs, the battery assembly is in the heating mode.
The battery assembly of claim 2, wherein the battery assembly further comprises a first switch, wherein the first reference terminal is electrically connected to one of the two tabs via the first switch, the The second reference terminal is connected to the other of the two tabs, and when the first switch is turned on, the battery assembly is in the heating mode.
The battery assembly of claim 1, wherein the battery assembly further comprises: a casing and a first pole and a second pole disposed on the casing, wherein the first pole and the second pole The column is used to receive an external heating electrical signal. When receiving the heating electrical signal, the first reference end is electrically connected to the first pole column, and the second reference end is connected to the second pole. A post is connected to transmit the heating electrical signal to the reference electrode sheet, which generates heat in response to the heating electrical signal.
The battery assembly of claim 4, wherein the battery assembly further comprises: a second switch, a third switch, the first pole and the second pole are used to receive an external charging electrical signal, the second The switch is electrically connected between the first reference terminal and the first pole, and the third switch is electrically connected between the second pole and the second pole;

When the second switch is turned on and the third switch is turned off, the heating electrical signal is transmitted to the reference electrode sheet, and the battery assembly is in the heating mode to heat the battery assembly ;

When the second switch is turned off and the third switch is turned on, the charging electrical signal is transmitted to the first tab and the second tab, and the battery assembly is in a charging mode for the battery assembly Charge.
The battery assembly of claim 5, wherein the heating mode includes a first heating mode and a second heating mode, wherein the battery assembly further comprises: a fourth switch electrically connected to the fourth switch between the third switch and the second pole;

When the second switch is turned on, the third switch is turned on, and the fourth switch is turned off, the heating electrical signal generated by the battery assembly is transmitted to the reference electrode sheet, and the battery assembly is in the a first heating mode to heat the battery assembly;

When the second switch is turned on, the third switch is turned off, and the fourth switch is turned on, the heating electrical signal received by the first pole is transmitted to the reference electrode sheet, and the battery assembly is in the the second heating mode to heat the battery assembly;

When the second switch is turned off, the third switch is turned on, and the fourth switch is turned on, the charging electrical signal is transmitted to the first tab and the second tab, and the charging mode is all to charge the battery pack described above.
The battery assembly according to any one of claims 1-6, wherein the battery assembly comprises a switch unit, and one of the first reference terminal and the second reference terminal is used for electrically connecting the acquisition unit. The first end, the first tab is electrically connected to the second end of the acquisition unit through the switch unit, so as to detect the first voltage signal of the battery assembly.
The battery assembly according to any one of claims 1-6, wherein the battery assembly comprises a switch unit, and one of the first reference terminal and the second reference terminal is used for electrically connecting the acquisition unit. The first end, the second tab is connected to the second end of the acquisition unit through the switch unit, so as to detect the second voltage signal of the battery assembly.
The battery assembly according to any one of claims 1-6, wherein the battery assembly comprises a first switch unit and a second switch unit, wherein,

One of the first reference end and the second reference end is used to electrically connect the first end of the first collection unit, and the first tab is electrically connected to the collection unit through the first switch unit the second end of the unit to detect the first voltage signal of the battery assembly;

The other one of the first reference terminal and the second reference terminal is also used for electrically connecting the first terminal of the second collecting unit, and the second tab is electrically connected to the second collecting unit through the second switching unit. The second end of the second acquisition unit is used to detect the second voltage signal of the battery assembly; wherein, the polarities of the first voltage signal and the second voltage signal are different.
The battery assembly of claim 1, wherein the battery assembly further comprises:

a temperature detection unit for detecting temperature information of the battery assembly;

The control unit is electrically connected to the temperature detection unit, and is used for controlling the on-off of the heating circuit according to the temperature information.
The battery assembly according to claim 10, wherein the control unit is configured to conduct the heating circuit of the reference electrode sheet when the temperature information is in a low temperature range, so that the reference electrode sheet generates heat; The control unit is further configured to disconnect the heating circuit of the reference electrode sheet when the temperature information reaches a normal charging temperature range, so as to stop the reference electrode sheet from heating the battery assembly.
The battery assembly of claim 1, wherein the reference electrode sheet comprises a metal layer and a lithium ion layer disposed on the metal layer, wherein the metal layer is a metal layer or a metal alloy layer.
The battery assembly of claim 12, wherein the material of the metal layer comprises at least one of aluminum, copper, nickel, copper, cobalt, tungsten, tin, lead, iron, silver, gold, platinum and alloys .
The battery assembly of claim 13, wherein the internal resistance of the reference electrode sheet is greater than a preset threshold.
The battery assembly according to claim 12, wherein the thickness of the metal layer in the reference electrode sheet is 0.1 μm˜40 μm, and the thickness of the lithium ion layer is 0.01 μm˜10 μm.
The battery assembly according to claim 1, wherein the first reference end and the second reference end are arranged on the same side of the reference electrode sheet.
The battery assembly according to claim 1, wherein the battery assembly further comprises: a third separator disposed on a side of the first pole piece away from the first membrane, and a third separator disposed on a side of the second pole piece away from the second pole piece Fourth diaphragm on one side of the diaphragm.
An electronic device comprising:

The battery assembly according to any one of claims 1-17;

a collection unit, the first end of the collection unit is electrically connected to one of the first reference end and the second reference end, and the second end of the collection unit is electrically connected to the first tab and the second reference end An electrical connection in the diode tab for detecting electrical parameters of the battery assembly.
A control method for a battery assembly, the battery assembly comprising: a first pole piece, a first diaphragm, a reference electrode piece, a second diaphragm and a second pole piece that are stacked in sequence, wherein the first pole piece is One side has a first tab, and one side of the second pole piece has a second tab; the reference electrode piece has a first reference end and a second reference end; wherein, the method includes:

detecting temperature information of the battery assembly;

The heating circuit of the battery assembly is controlled to be turned on according to the temperature information, so that the reference electrode sheet generates heat, wherein the heating circuit transmits the heating electrical signal output by either terminal of the power supply unit to the reference electrode. than the circuit of the electrode sheet;

Control the conduction of the test branch of the battery assembly according to the temperature information to detect the electrical parameters of the battery assembly, wherein the test branch is any reference end and any pole of the reference electrode sheet branch between the ears.
The method of claim 19, wherein when the heating circuit is turned on, the battery assembly is in a heating mode, the heating mode includes a first heating mode and a second heating mode, and the temperature information is based on the temperature information. Controlling the conduction of the heating circuit of the battery assembly includes:

determining a target heating mode from the first heating mode and the second heating mode according to the temperature information;

The target heating circuit corresponding to the target heating mode is turned on according to the target heating mode.