Battery, battery management method and electronic device

Abstract

The present application provides a battery, a battery management method and an electronic device, wherein the battery comprises a battery cell, the battery cell comprises a shell and a bare battery cell, the bare battery cell comprises a first pole piece, a second pole piece and a reference pole piece; the first pole piece is provided with a first pole ear, the second pole piece is provided with a second pole ear, and the reference pole piece is provided with a reference pole ear; the first pole piece has a first polarity, and the second pole piece has a second polarity; the first pole piece, the second pole piece and the reference pole piece are located inside the shell, and at least part of the first pole ear, the second pole ear and the reference pole ear extend outside the shell; the first pole ear and the second pole ear cooperate to input current into the battery cell, or enable the battery cell to output current; the reference pole ear is used to obtain the real potential of the first pole piece and the real potential of the second pole piece. The reference pole ear can be used to obtain the real potential of the first pole ear and the second pole ear, so as to facilitate real-time evaluation of various performances of the battery.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a battery, a battery management method and an electronic equipment. Background Art

[0002] With the development of science and technology, electronic products such as mobile phones and laptops have become an indispensable part of daily work and life. Batteries are important components of electronic products such as mobile phones and laptops. They are mainly used to provide power for electronic products so that they can work normally.

[0003] However, current batteries, after being applied to electronic devices, cannot obtain the true potential of the positive and negative electrodes in real time during the battery charging or discharging process, which makes it difficult to evaluate the various performance of the battery during the battery charging or discharging process. Summary of the invention

[0004] The present application provides a battery, a battery management method and an electronic device. After the battery is installed on the electronic device, the real potential of the positive electrode and the negative electrode can be obtained in real time, so as to facilitate real-time evaluation of various performances of the battery.

[0005] The first aspect of the present application provides a battery, comprising: a battery cell, the battery cell comprising a shell and a bare battery cell, the bare battery cell comprising a first electrode piece, a second electrode piece and a reference electrode piece; a first electrode piece is provided with a first pole piece, a second pole piece is provided with a second pole piece, and a reference electrode piece is provided with a reference pole piece; the first pole piece has a first polarity, and the second pole piece has a second polarity; one of the first polarity and the second polarity is a positive pole, and the other is a negative pole; the first pole piece, the second pole piece and the reference pole piece are located inside the shell, and the first pole piece, the second pole piece and the reference pole piece are located inside the shell or partially extend outside the shell; the first pole piece and the second pole piece cooperate to input current into the battery cell, or enable the battery cell to output current; the reference pole piece is used to obtain the real potential of the first pole piece during the input current or output current process, and is used to obtain the real potential of the second pole piece during the input current or output current process.

[0006] In the present application, the battery includes a battery cell and a protection circuit board, the protection circuit board is located on one side of the battery cell, and is connected to the first pole ear, the second pole ear and the reference pole ear. The reference pole piece is provided with a reference pole ear, and the first pole ear, the second pole ear and the reference pole ear can be seen from the appearance of the battery cell. The first pole ear, the second pole ear and the reference pole ear can be connected to the main circuit board of the electronic device through the protection circuit board, and further connected to the battery management unit of the electronic device. If the reference pole piece does not participate in the charging and discharging of the battery, the reference pole piece always has a stable potential. The battery management unit can calculate the real potential of the first pole piece and the second pole piece according to the potential of the reference pole piece, the voltage between the first pole ear and the reference pole ear during the charging and discharging process, and the voltage between the first pole ear and the second pole ear during the charging and discharging process. After the real potential of the first pole piece and the second pole piece is calculated, it can be used to evaluate various performances and risks of the battery, such as whether there is a risk of lithium precipitation, whether there is a risk of irreversible damage to the material caused by the electrode material exceeding its tolerance range, etc.

[0007] In addition, the reference electrode, the first electrode and the second electrode are stacked or wound. The reference electrode is not an additional component added after the first electrode and the second electrode are stacked. Instead, during the battery manufacturing process, the first electrode, the second electrode and the reference electrode are directly stacked together. Compared with the reference electrode in the prior art that occupies extra space and is connected from the outside, the risk of the battery itself is reduced, which is beneficial to the stability of the battery structure and can increase the safety factor of the battery.

[0008] In some embodiments, the reference electrode has a first polarity, and the reference electrode cooperates with the second electrode to input current into the battery cell, or to make the battery cell output current. That is, the reference electrode can also participate in the charging and discharging process of the battery, thereby increasing the capacity of the battery as much as possible without occupying additional space, and facilitating the measurement of the real potential of the positive and negative electrodes of the battery.

[0009] In some embodiments, the battery has a first conductive circuit and a second conductive circuit; the first conductive circuit and the second conductive circuit share a second pole lug; the first pole lug and the reference pole lug are respectively the positive pole of the first conductive circuit and the positive pole of the second conductive circuit, and the second pole lug is the negative pole of the first conductive circuit and the second conductive circuit; or, the first pole lug and the reference pole lug are respectively the negative pole of the first conductive circuit and the negative pole of the second conductive circuit, and the second pole lug is the positive pole of the first conductive circuit and the second conductive circuit.

[0010] After the reference tab participates in the charging and discharging of the battery, the battery has two conductive circuits, which can improve the charging and discharging efficiency of the battery, reduce the heat generation of the battery, and extend the life of the battery.

[0011] In some embodiments, the first pole piece, the second pole piece and the reference pole piece have the same shape; in the thickness direction of the battery, the outer periphery of the first pole piece, the outer periphery of the second pole piece and the outer periphery of the reference pole piece are aligned or parallel.

[0012] In some embodiments, the first pole piece, the second pole piece, and the reference pole piece have the same size, where the size includes a length size and a width size. Thus, the first pole piece, the second pole piece, and the reference pole piece are easy to align when stacked, which can improve the structural compactness of the battery and facilitate the assembly of the battery. Specifically, the first pole piece, the second pole piece, and the reference pole piece are all rectangular sheets, and the four sides of the first pole piece are aligned one by one with the four sides of the reference pole piece, and the four sides of the second pole piece are aligned one by one with the four sides of the reference pole piece.

[0013] In some embodiments, the shapes and sizes of the first pole piece, the second pole piece and the reference pole piece may also be different, and those skilled in the art may make configurations according to actual needs.

[0014] In some embodiments, the material of the reference electrode is the same as that of the first electrode. The first electrode includes a first current collector layer and a first active layer, and the reference electrode includes a reference current collector layer and a reference active layer. The reference current collector layer is made of the same material as the first current collector layer, and the first active layer is made of the same material as the reference active layer. If the polarity of the first electrode and the reference electrode is positive, the first electrode and the reference electrode are both made of positive electrode material. If the first electrode and the reference electrode are both negative electrodes, the first electrode and the reference electrode are both made of negative electrode material. As a result, the reference electrode can participate in the charging and discharging of the battery as a positive electrode or a negative electrode.

[0015] In some embodiments, there are multiple first pole pieces, and each of the multiple first pole pieces is provided with a first pole ear; the multiple first pole pieces are divided into a first part and a second part, and the first pole ear of the first pole piece of the first part and the first pole ear of the first pole piece of the second part are staggered; the first pole ear of the first pole piece of the first part cooperates with the second pole ear to input current to the battery cell, or to output current from the battery cell; the first pole ear of the first pole piece of the second part cooperates with the second pole ear to input current to the battery cell, or to output current from the battery cell. As a result, the battery has four pole ears, which are two first pole ears, one second pole ear, and one reference pole ear. The two first pole ears participate in the charging and discharging of the battery respectively, so that the charging and discharging efficiency of the battery is higher.

[0016] In some embodiments, the battery has a first conductive circuit, a second conductive circuit, and a third conductive circuit; the first conductive circuit, the second conductive circuit, and the third conductive circuit share a second pole lug; the first pole lugs of the two first pole sheets and the reference pole lug are respectively the positive pole of the first conductive circuit, the positive pole of the second conductive circuit, and the positive pole of the third conductive circuit, and the second pole lug is the negative pole of the first conductive circuit, the second conductive circuit, and the third conductive circuit; or, the first pole lugs of the two first pole sheets and the reference pole lug are respectively the negative pole of the first conductive circuit, the negative pole of the second conductive circuit, and the negative pole of the third conductive circuit, and the second pole lug is the positive pole of the first conductive circuit, the second conductive circuit, and the third conductive circuit.

[0017] The battery is divided into three conductive circuits for charging and discharging, which can further improve the charging and discharging efficiency, reduce battery heating, and extend battery life.

[0018] In some embodiments, there are multiple second pole sheets, and each of the multiple second pole sheets is provided with a second pole ear; the multiple second pole sheets are divided into a first part and a second part, and the second pole ear of the second pole sheet of the first part and the second pole ear of the second pole sheet of the second part are staggered; the first pole ear cooperates with the second pole ear of the second pole sheet of the first part to input current into the battery cell, or to output current from the battery cell; the reference pole ear cooperates with the second pole ear of the second pole sheet of the second part to input current into the battery cell, or to output current from the battery cell.

[0019] Therefore, the battery has four tabs, which are a first tab, two second tabs, and a reference tab. The two second tabs are respectively involved in the charging and discharging of the battery, making the charging and discharging efficiency of the battery higher.

[0020] In some embodiments, the battery has a first conductive circuit and a second conductive circuit; the first pole tab and the reference pole tab are respectively the positive electrode of the first conductive circuit and the positive electrode of the second conductive circuit, and the second pole tabs of the two second pole sheets are respectively the negative electrode of the first conductive circuit and the negative electrode of the second conductive circuit; or, the first pole tab and the reference pole tab are respectively the negative electrode of the first conductive circuit and the negative electrode of the second conductive circuit, and the second pole tabs of the two second pole sheets are respectively the positive electrode of the first conductive circuit and the positive electrode of the second conductive circuit.

[0021] The positive pole and the negative pole of each of the two conductive circuits are separated, which can reduce the heat generation of the battery and extend the service life of the battery.

[0022] In some embodiments, the first pole lug, the second pole lug, and the reference pole lug are all disposed on the same side of the bare cell; the first pole lug and the reference pole lug are located on both sides of the second pole lug. Thus, the first pole lug and the second pole lug constitute the positive and negative poles of a conductive loop, and the second pole lug and the reference pole lug constitute the positive and negative poles of a conductive loop.

[0023] In some embodiments, the battery further includes a separator; the number of the first pole piece and the second pole piece are both multiple, and the first pole piece, the second pole piece, the reference pole piece and the separator are stacked or wound to form a bare cell; the reference pole piece is located at any layer of the bare cell, part of the second pole piece is alternately distributed with multiple first pole pieces, and another part of the second pole piece is alternately distributed with the reference pole piece; a separator is provided between adjacent first pole pieces and second pole pieces, and a separator is provided between adjacent second pole pieces and the reference pole piece. Here, multiple means more than two.

[0024] The number of reference electrodes may be one or more. In the case of multiple reference electrodes, each of the multiple reference electrodes has a reference electrode lug, and the multiple reference electrode lugs are connected into a whole.

[0025] In some embodiments, the battery further includes a protection circuit board, which is fixed to one side of the housing and connected to the first electrode tab, the second electrode tab, and the reference electrode tab.

[0026] The second aspect of the present application provides a battery management method, which is applied to the battery in the first aspect of the present application, and the method includes: when the battery is charged or discharged, obtaining the voltage between the reference pole ear and the second pole ear, and obtaining the voltage between the first pole ear and the second pole ear. According to the voltage between the reference pole ear and the second pole ear and the potential of the stored reference pole sheet, the real potential of the second pole sheet is obtained; according to the voltage between the first pole ear and the second pole ear and the real potential of the second pole sheet, the real potential of the first pole sheet is obtained.

[0027] Specifically, the reference electrode has a stable potential, and the reference electrode does not participate in charging and discharging. After the battery is installed in the electronic device, the battery management unit is connected to the first electrode, the second electrode and the reference electrode through the main circuit board and the protection circuit board respectively. During the battery charging and discharging process, the battery management unit directly obtains the stored potential of the reference electrode, and obtains the voltage between the second electrode and the reference electrode, and the voltage between the first electrode and the second electrode; the difference between the potential of the reference electrode and the voltage between the second electrode and the reference electrode is calculated to obtain the real potential (real potential) of the second electrode; then the real potential of the second electrode and the sum of the voltage between the first electrode and the second electrode are calculated to obtain the real potential (real potential) of the first electrode.

[0028] The third aspect of the present application provides a battery management method, which is applied to the battery of the first aspect of the present application, and the method includes: when the battery is charged or discharged, obtaining characteristic parameters of the battery, and comparing the obtained characteristic parameters with stored characteristic parameters; the stored characteristic parameters are located in a corresponding relationship table or corresponding relationship curve between the characteristic parameters and the potential of a reference electrode; the characteristic parameters include but are not limited to the number of charge and discharge times, current, voltage, charge and discharge time, and battery temperature; when the obtained characteristic parameters correspond to the stored characteristic parameters, obtaining the potential of the reference electrode corresponding to the stored characteristic parameters; obtaining the voltage between the reference electrode and the second electrode, and obtaining the voltage between the first electrode and the second electrode; obtaining the real potential of the second electrode according to the voltage between the reference electrode and the second electrode and the obtained potential of the reference electrode; obtaining the real potential of the first electrode according to the voltage between the first electrode and the second electrode and the real potential of the second electrode.

[0029] Specifically, the reference electrode is involved in the charging and discharging of the battery, so the potential of the reference electrode will change with the changes in characteristic parameters such as the number of times the battery is charged and discharged, the battery temperature, the voltage and current. Therefore, in the present application, the characteristic parameters of the battery and the potential change relationship of the reference pole ear are stored in advance in the form of a table or curve. When it is necessary to monitor the lithium deposition of the battery in the future, the reference potential can be directly obtained from the stored characteristic parameters and the potential change relationship of the reference pole ear. Then the obtained reference potential is used to calculate the true potential of the first pole piece and the true potential of the second pole piece. As a result, the various parameters of the battery are more accurate, and the battery can be better monitored.

[0030] In some embodiments, before obtaining the characteristic parameters of the battery, the method also includes: obtaining a table or a curve of correspondence between the characteristic parameters and the potential of a reference electrode; specifically including: charging or discharging the battery; obtaining the characteristic parameters of the battery during the charging or discharging process; obtaining the potential of the reference electrode corresponding to different characteristic parameters; and storing the characteristic parameters and the corresponding potential of the reference electrode in the form of a table or a curve.

[0031] Specifically, the battery is charged or discharged, and then the battery temperature, voltage, current and charge and discharge times are obtained, and then the potential of the reference electrode at this time is detected, and the potential of the reference electrode corresponding to the battery temperature, voltage, current and charge and discharge times is stored.

[0032] The number of times the battery is charged and discharged can detect the potential of the reference electrode once at a fixed interval, or can detect the potential of the reference electrode without interval or at an irregular interval. Take the detection of the potential of the reference electrode once every 500 times as an example: when the number of times the battery is charged and discharged is fixed (for example, 500 times), the potential of the reference electrode can be obtained as follows: after the number of times the battery is charged and discharged reaches a first threshold value (for example, 500 times), the first potential of the reference electrode, the first current of the battery, the first voltage of the battery, and the first battery temperature are detected; after the number of times the battery is charged and discharged reaches a second threshold value (for example, 1000 times), the second potential of the reference electrode, the second current of the battery, the second voltage of the battery, and the second battery temperature are detected; the first threshold value and the second threshold value are both positive integers, the second threshold value is greater than the first threshold value, and the difference between the second threshold value and the first threshold value is equal to the first threshold value. The first potential, the second potential, the first threshold value, the second threshold value, the first current, the second current, the first voltage, the second voltage, the first battery temperature and the second battery temperature are stored in a table or a curve; in the table or the curve, the first threshold value, the first current, the first voltage and the first battery temperature correspond to the first potential, and the second threshold value, the second current, the second voltage and the second battery temperature correspond to the second potential.

[0033] After the table or curve showing the change of the potential of the reference electrode with the characteristic parameters of the battery is stored, when the electronic device is subsequently used, during the battery charging and discharging process, the battery manager can look up the table to obtain the potential of the reference electrode, and then detect the voltage between the first pole ear and the second pole ear, and detect the voltage between the reference pole ear and the second pole ear. Then, the potential of the reference electrode, the voltage between the first pole ear and the second pole ear, and the voltage between the reference pole ear and the second pole ear are used to calculate the real potential of the first pole sheet and the real potential of the second pole sheet. Specifically: the difference between the potential of the reference electrode and the voltage between the second pole ear and the reference pole ear is calculated to obtain the real potential (real potential) of the second pole sheet; then the real potential of the second pole sheet and the sum of the voltage between the first pole ear and the second pole ear are calculated to obtain the real potential (real potential) of the first pole sheet.

[0034] A fourth aspect of the present application provides an electronic device, including a battery manager and a memory, wherein the memory is used to store instructions, and the battery manager is used to execute instructions so that the method in the second aspect of the present application is executed.

[0035] In the fifth aspect of the present application, an electronic device comprises a housing, a battery manager and a battery according to any one of the first aspects of the present application, wherein the housing is provided with an installation compartment, the battery and the battery manager are installed in the installation compartment, and the battery manager is electrically connected to the first pole lug, the second pole lug and the reference pole lug. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0037] Figure 1 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0038] Figure 2 yes Figure 1 Schematic diagram of the split structure of the electronic device shown in.

[0039] Figure 3 yes Figure 2 Schematic diagram of the structure of the battery of the electronic device shown in.

[0040] Figure 4 yes Figure 3 Schematic diagram of the structure of the internal components of the bare battery cell of the battery shown in.

[0041] Figure 5 yes Figure 2 A schematic structural diagram of an embodiment of a bare cell of a battery shown in FIG.

[0042] Figure 6 yes Figure 5 Schematic diagram of the split structure of the bare battery cell shown in.

[0043] Figure 7 yes Figure 2 Schematic diagram of the structure of a second embodiment of a bare cell of a battery shown in FIG.

[0044] Figure 8 yes Figure 7 Schematic diagram of the split structure of the bare battery cell shown in.

[0045] Fig. 9 yes Figure 2 Schematic diagram of the structure of a third embodiment of a bare cell of a battery shown in FIG.

[0046] Fig.10 yes Fig. 9 Schematic diagram of the split structure of the bare battery cell shown in.

[0047] Fig.11 yes Figure 2 Schematic diagram of the structure of a fourth embodiment of a bare cell of a battery shown in FIG.

[0048] Fig.12 yes Fig.11 Schematic diagram of the split structure of the bare battery cell shown in.

[0049] Fig.13 yes Figure 2 Schematic diagram of the structure of a fifth embodiment of a bare cell of a battery shown in FIG.

[0050] Fig.14 yes Fig.13 Schematic diagram of the split structure of the bare battery cell shown in.

[0051] Fig.15 yes Figure 2 Schematic diagram of the structure of a sixth embodiment of a bare cell of a battery shown in FIG.

[0052] Fig.16 yes Fig.15 Schematic diagram of the split structure of the bare battery cell shown in.

[0053] Fig.17 yes Figure 2 Schematic diagram of the structure of the seventh embodiment of the bare cell of the battery shown in.

[0054] Fig.18 yes Fig.17 Schematic diagram of the split structure of the bare battery cell shown in.

[0055] Fig.19 yes Figure 2 Schematic diagram of the structure of an eighth embodiment of a bare cell of a battery shown in FIG.

[0056] Fig. 20 yes Fig.19 Schematic diagram of the split structure of the bare battery cell shown in.

[0057] Fig.21 yes Figure 2 Schematic diagram of the structure of a ninth embodiment of a bare cell of a battery shown in FIG.

[0058] Fig. 22 yes Fig.21 Schematic diagram of the split structure of the bare battery cell shown in.

[0059] Fig.23 yes Figure 2 Schematic diagram of the structure of a tenth embodiment of a bare cell of a battery shown in FIG.

[0060] Fig.24 yes Fig.23 Schematic diagram of the split structure of the bare battery cell shown in.

[0061] Fig.25 yes Figure 2 FIG. 1 is a schematic structural diagram of an eleventh embodiment of a bare cell of a battery shown in FIG. 1 .

[0062] Fig.26 yes Fig.25 Schematic diagram of the split structure of the bare battery cell shown in.

[0063] Fig. 27 yes Figure 2 Schematic diagram of the structure of a twelfth embodiment of a bare cell of a battery shown in FIG.

[0064] Fig.28 yes Fig. 27 Schematic diagram of the split structure of the bare battery cell shown in. DETAILED DESCRIPTION

[0065] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0066] The present application provides an electronic device 1000. The electronic device 1000 includes, but is not limited to, a cell phone, a foldable phone, a notebook computer, a tablet personal computer, a laptop computer, a personal digital assistant, or a wearable device, etc. The following description will be made by taking the electronic device 1000 as a cell phone.

[0067] See also Figure 1 and Figure 2 , Figure 1 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 2 yes Figure 1 Schematic diagram of the split structure of the electronic device shown in.

[0068] For ease of description, the width direction of the mobile phone is defined as the X-axis direction, the length direction of the mobile phone is defined as the Y-axis direction, and the thickness direction of the mobile phone is defined as the Z-axis direction. The X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other.

[0069] The mobile phone includes a display screen 200, a housing 300 and a battery 100. The display screen 200 is mounted on the housing 300. The housing 300 is provided with an installation compartment 330. The battery 100 is installed in the installation compartment 330. The battery 100 is a simple schematic diagram. In fact, one or more connectors may extend from the battery 100. Figure 2 Not indicated.

[0070] In this embodiment, the display screen 200 has a touch function, and the display screen 200 includes a display surface and a mounting surface, the display surface and the mounting surface are arranged opposite to each other, the mounting surface of the display screen 200 faces the housing 300, and the display surface is used to display text, images, and videos. The display surface of the display screen 200 is away from the housing 300. The display screen 200 can be any of the following display screens 200: an organic light-emitting diode (OLED) display screen 200, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen 200, a mini organic light-emitting diode (mini organic light-emitting diode) display screen 200, a micro organic light-emitting diode (microorganic light-emitting diode) display screen 200, a microorganic light-emitting diode (microorganic light-emitting diode) display screen 200, and a quantum dot light-emitting diode (quantum dot light-emitting diodes, QLED) display screen 200.

[0071] The housing 300 includes a middle frame 310 and a back cover 320, wherein the middle frame 310 includes a middle plate and a frame, the frame surrounds the middle plate and is connected to the middle plate, and the middle plate is used to support the display screen 200, the main circuit board, the battery 100 and other devices. The back cover 320 is a rectangular thin plate. The back cover 320 is fixed to one side of the middle frame 310, and the back cover 320, the frame and the middle plate enclose an installation chamber 330. The display screen 200 is installed on the side of the middle frame 310 away from the back cover 320.

[0072] It can be understood that the mobile phone also includes a main circuit board (not shown) and a battery manager (not shown). The main circuit board is the main board of the mobile phone, and the main board is used to install a processor, various functional electronic devices and circuits, etc. The battery manager is used to manage various parameters of the battery.

[0073] See also Figure 3 , Figure 3 yes Figure 2 Schematic diagram of the structure of the battery of the electronic device shown in.

[0074] The battery 100 includes a battery cell 100A and a protection circuit board (not shown). The battery cell 100A includes a housing 120 and a bare battery cell 110. The housing 120 is provided with a housing cavity 121, and the bare battery cell 110 is installed in the housing cavity 121. The bare battery cell 110 has a first pole ear 11, a second pole ear 21, and a reference pole ear 31. The first pole ear 11, the second pole ear 21, and the reference pole ear 31 can all be connected to the battery manager through the protection circuit board and the main circuit board. The first pole ear 11 and the second pole ear 21 can cooperate to charge or discharge the bare battery cell 110. The reference pole ear 31 can be used to assist in obtaining the real potential of the positive electrode and the real potential of the negative electrode of the bare battery cell 110, and can be used to cooperate with the first pole ear 11 or the second pole ear 21 to charge or discharge the bare battery cell 110.

[0075] The housing 120 is rectangular and includes a first wall and a second wall opposite to each other along the Z-axis direction, and a peripheral wall connected between the first wall and the second wall. The first wall, the second wall and the peripheral wall together form a receiving cavity 121. The peripheral wall includes a first peripheral wall, a second peripheral wall, a third peripheral wall and a fourth peripheral wall connected in sequence end to end.

[0076] See also Figure 4 , Figure 4 yes Figure 3 Schematic diagram of the structure of the internal components of the bare battery cell of the battery shown in.

[0077] In some embodiments, the bare cell 110 includes a first electrode 10, a second electrode 20, a reference electrode 30 and an isolation film 40, and the first electrode 10, the second electrode 20, the reference electrode 30 and the isolation film 40 are stacked. The first electrode 10 can be one or more, and the second electrode 20 can be one or more. Multiple first electrode sheets 10 and multiple second electrode sheets 20 are alternately stacked along the Z-axis direction. In other words, one first electrode sheet 10 is adjacent to one second electrode sheet 20. An isolation film 40 is arranged between adjacent first electrode sheets 10 and second electrode sheets 20. The number of reference electrode sheets 30 is one or more, and the reference electrode sheet 30 can be located at any layer of the bare cell 110. For example, the top layer, the bottom layer, the second layer, the third layer, the fourth layer, etc.; and an isolation film 40 is arranged between the reference electrode sheet 30 and the adjacent first electrode sheet 10, and an isolation film 40 is also arranged between the reference electrode sheet 30 and the adjacent second electrode sheet 20. An isolation film 40 also needs to be arranged between adjacent reference electrode sheets 30. In other embodiments, the first pole piece 10 , the second pole piece 20 , the reference pole piece 30 and the isolation film 40 may also be wound.

[0078] In some embodiments, one of the first pole piece 10 and the second pole piece 20 is a positive pole piece, and the other is a negative pole piece. In this embodiment, the first pole piece 10 is a positive pole piece and the second pole piece 20 is a negative pole piece for illustration. In other embodiments, the first pole piece 10 is a negative pole piece and the second pole piece 20 is a positive pole piece.

[0079] Please continue reading Figure 4 In this embodiment, the first pole piece 10 is a positive pole piece, and the first pole piece 10 is provided with a first pole ear 11, and the first pole piece 10 and the first pole ear 11 are integrally formed. The first pole piece 10 is a rectangular sheet, and the first pole ear 11 is a rectangular strip, and the first pole ear 11 is formed by a protrusion on one side of the first pole piece 10. The first pole ear 11 is located on the left side of the central axis O1 of one side of the first pole piece 10 (towards the negative direction of the X-axis). In other embodiments, the first pole ear 11 can be located on the right side of the central axis O1 of one side of the first pole piece 10 (towards the positive direction of the X-axis), or located in the middle of one side of the first pole piece 10.

[0080] In this embodiment, the first pole piece 10 includes a first current collector layer and a first active layer stacked along the Z-axis direction, and the first current collector layer is aluminum foil. The first active layer is coated on the first current collector layer, and the first active layer is at least one of lithium titanate, lithium iron phosphate, lithium manganate, lithium manganese phosphate, lithium nickelate, lithium cobaltate, lithium manganese iron phosphate, etc. In other embodiments, the first current collector layer can also be made of metal foil such as copper foil, gold foil, silver foil or nickel foil.

[0081] See also Figure 4 In this embodiment, the second pole piece 20 is a negative pole piece, and the second pole piece 20 is provided with a second pole ear 21, and the second pole piece 20 and the second pole ear 21 are integrally formed. The shape and size of the second pole piece 20 are the same as the shape and size of the first pole piece 10, and the size here includes the width dimension along the X-axis direction, the length dimension along the Y-axis direction, and the thickness dimension along the Z-axis direction. The second pole piece 20 is a rectangular sheet. The shape of the second pole ear 21 is the same as the shape of the first pole ear 11, and the second pole ear 21 is a rectangular strip, and the second pole ear 21 is formed by a protrusion on one side of the second pole piece 20.

[0082] In other embodiments, the second pole piece 20 may have a different shape from the first pole piece 10, such as a square, an ellipse, a parallelogram, etc. In other embodiments, the size of the second pole piece 20 may also be different from the size of the first pole piece 10, such as the length of the second pole piece 20 is less than or greater than the length of the first pole piece 10, the width of the second pole piece 20 is less than or greater than the width of the first pole piece, etc.

[0083] In this embodiment, the second pole ear 21 is located in the middle of one side of the second pole piece 20. In other embodiments, the second pole ear 21 is located on the right side of one side of the second pole piece 20 (towards the positive direction of the X axis), or on the left side of one side of the second pole piece 20 (towards the negative direction of the X axis).

[0084] In this embodiment, the second pole piece 20 includes a second current collector layer and a second active layer stacked along the Z-axis direction, the second current collector layer is a copper foil, the second active layer is coated on the second current collector layer, and the second active layer can be graphite, lithium titanate, silicon, graphite / silicon composite material and graphene, etc. In other embodiments, the second current collector layer can be made of metal foil such as aluminum foil, gold foil, silver foil or nickel foil.

[0085] See also Figure 4 , the reference electrode piece 30 is provided with a reference electrode ear 31, and the reference electrode ear 31 and the reference electrode piece 30 are integrally formed. In the present embodiment, the shape and size of the reference electrode piece 30 are the same as the shape and size of the first electrode piece 10, and the size here includes the width dimension along the X-axis direction, the length dimension along the Y-axis direction, and the thickness dimension along the Z-axis direction. The shape of the reference electrode ear 31 is the same as the shape of the first electrode ear 11 and the second electrode ear 21. That is, the reference electrode piece 30 is a rectangular sheet, and the reference electrode ear 31 is a rectangular strip, and the reference electrode ear 31 is formed by a protrusion on one side of the reference electrode piece 30.

[0086] In other embodiments, the shape of the reference electrode 30 may also be different from the first electrode 10 and the second electrode 20, for example, it may be a square, a circular sheet, an elliptical sheet, etc. The specific shape of the reference electrode 30 may be set according to actual needs. In other embodiments, the size of the reference electrode 30 may also be different from the size of the first electrode 10, for example, the length of the reference electrode 30 is less than or greater than the length of the first electrode 10, the width of the reference electrode 30 is less than or greater than the width of the first electrode, and so on.

[0087] In this embodiment, the reference electrode tab 31 can be located on the right side (towards the positive direction of the X-axis) of one side of the reference electrode 30. In other embodiments, the reference electrode tab 31 is located in the middle of one side of the reference electrode 30, or is located on the left side (towards the negative direction of the X-axis) of one side of the reference electrode 30.

[0088] In this embodiment, the reference electrode 30 includes a reference current collector layer and a reference active layer. The reference current collector layer is made of the same material as the first current collector layer, and the reference active layer is made of the same material as the first active layer; in other words, the reference electrode 30 is made of the same material as the first electrode 10. In other embodiments, the reference current collector layer is made of the same material as the second current collector layer, and the reference active layer is made of the same material as the second active layer; in other words, the reference electrode 30 is made of the same material as the second electrode 20.

[0089] In other embodiments, the reference current collector layer is made of a material different from that of the first current collector layer, and the reference active layer is made of a material different from that of the first active layer; for example, the first current collector layer is made of aluminum foil, and the reference current collector layer is made of aluminum foil; the first active layer is made of lithium cobalt oxide, and the reference active layer is made of lithium manganese oxide. At this time, although the material of the reference electrode 30 is different from that of the first electrode 10, the reference electrode 30 can also be used as a positive electrode, the first electrode 10 and the reference electrode 30 are both positive electrodes, and the second electrode 20 is a negative electrode.

[0090] In other embodiments, the reference current collector layer is made of a material different from that of the second current collector layer, and the reference active layer is made of a material different from that of the second active layer; for example, the second current collector layer is made of copper foil, and the reference current collector layer is made of copper foil; the second active layer is made of graphite, and the reference active layer is made of lithium titanate. In this case, although the material of the reference electrode 30 is different from that of the second electrode 20, the reference electrode 30 can also be used as a negative electrode, and the second electrode 20 and the reference electrode 30 are both negative electrodes, and the first electrode 10 is a positive electrode.

[0091] In other embodiments, the reference electrode 30 only includes a reference current collector layer, and the reference current collector layer is made of metal foil such as aluminum foil, copper foil, gold foil, silver foil or nickel foil.

[0092] In this embodiment, the isolation film 40 is a rectangular sheet, and the shape and size of the isolation film 40 are the same as those of the first pole piece 10 and the second pole piece 20. The isolation film 40 is a polymer film, and has micropores on the isolation film 40, and the micropores allow lithium ions to pass freely. The isolation film 40 is made of materials such as polyethylene or polypropylene.

[0093] See also Figure 3 In this embodiment, the first pole piece 10, the isolation film 40, the second pole piece 20 and the reference pole piece 30 are stacked along the Z-axis direction to form a bare cell. The outer edges of the first pole piece 10, the isolation film 40, the second pole piece 20 and the reference pole piece 30 after being stacked are aligned. Specifically, the four sides of the first pole piece 10, the four sides of the isolation film 40, the four sides of the second pole piece 20, and the four sides of the reference pole piece 30 are all aligned. As a result, the structure of the bare cell is relatively compact.

[0094] When the number of first pole pieces 10 and the number of second pole pieces 20 are plural, after the first pole pieces 10, the isolation membrane 40, the second pole pieces 20 and the reference pole piece 30 are stacked, the first pole pieces 11 of the plurality of first pole pieces 10 are welded and fixed into an integrated structure, and the second pole pieces 21 of the plurality of second pole pieces 20 are welded and fixed into an integrated structure.

[0095] In this embodiment, the bare cell 110 is installed in the accommodating cavity 121 of the housing 120. Specifically, the first pole piece 10, the second pole piece 20, the reference pole piece 30 and the isolation membrane 40 are located in the accommodating cavity 121. A portion of the first pole ear 11 of the first pole piece 10 is located in the accommodating cavity 121, and another portion of the plurality of first pole ears 11 extends out of the accommodating cavity 121 and is welded into one. A portion of the second pole ear 21 of the second pole piece 20 is located in the accommodating cavity 121, and another portion of the plurality of second pole ears 21 extends out of the accommodating cavity 121 and is welded into one. A portion of the reference pole ear 31 of the reference pole piece 30 is located in the accommodating cavity 121, and another portion extends out of the accommodating cavity 121.

[0096] In other embodiments, the plurality of first pole tabs 11 , the plurality of second pole tabs 21 and the reference pole tab 31 are all located inside the housing 120 , and then the first pole tab 11 , the second pole tab 21 and the reference pole tab 31 can be led out of the housing 120 using devices such as conductive columns.

[0097] When the first pole tabs 11 of the plurality of first pole sheets 10 are all aligned, and the second pole tabs 21 of the plurality of second pole sheets 20 are all aligned and welded into an integrated structure, the battery cell 100A has three pole tabs visible from the appearance. The three pole tabs are a first pole tab 11, a second pole tab 21, and a reference pole tab 31.

[0098] In other embodiments, the number of pole tabs in the visible state of the battery cell 100A is four or five, etc., as viewed from the appearance. Specifically, the plurality of first pole sheets 10 are divided into a first part and a second part, and the first pole tabs 11 of the first pole sheets 10 of the first part are aligned and then welded into a whole. The first pole tabs 11 of the first pole sheets 10 of the second part are aligned and then welded into a whole. Moreover, the first pole tabs 11 of the first part and the first pole tabs 11 of the second part welded into a whole are staggered with each other. For example, with the central axis O1 of the bare battery cell 110 parallel to the Y-axis direction as a reference, the first pole tab 11 of the first part is located on the right side of the central axis O1 (towards the positive direction of the X-axis), and the first pole tab 11 of the second part is located on the left side of the central axis O1 (towards the negative direction of the X-axis). At this time, the battery 100 has two first pole tabs 11 in appearance. Then the battery cell 100A has four pole tabs in the visible state as viewed from the appearance, specifically two first pole tabs 11, one second pole tab 21, and one reference pole tab 31.

[0099] If a plurality of second pole pieces 20 are divided into a first part and a second part, the second pole tabs 21 of the second pole pieces 20 of the first part are aligned and then welded into a whole. The second pole tabs 21 of the second pole pieces 20 of the second part are aligned and then welded into a whole. Moreover, the second pole tabs 21 of the first part and the second pole tabs 21 of the second part welded into a whole are staggered with each other. For example, the second pole tab 21 of the first part is located on the right side of the central axis O1 (towards the positive direction of the X-axis), and the second pole tab 21 of the second part is located on the left side of the central axis O1 (towards the negative direction of the X-axis). At this time, the battery 100 has two second pole tabs 21 in appearance. Then, the battery cell 100A has four pole tabs in a visible state from the appearance, specifically one first pole tab 11, two second pole tabs 21, and one reference pole tab 31.

[0100] In this embodiment, the mobile phone further includes a charging and discharging circuit (not shown), which is arranged on a main circuit board, and the main circuit board is installed inside the housing 300. The battery 100 is connected to the charging and discharging circuit, and specifically, the first pole tab 11, the second pole tab 21 and the reference pole tab 31 are respectively connected to the charging and discharging circuit to form a conductive loop to realize the charging and discharging functions of the battery 100.

[0101] If the reference electrode 30 is made of the same material as the first electrode 10, or the material of the reference electrode 30 is different from that of the first electrode 10, but the reference electrode 30 is made of a material that can be used as a positive electrode. Then the reference electrode 30 can be used as a positive electrode to participate in the charge and discharge reaction, thereby improving the storage capacity of the bare battery cell. Specifically, the first pole ear 11 and the second pole ear 21 can constitute the positive and negative poles of a conductive circuit. In other words, the first pole ear 11 and the second pole ear 21 can cooperate to input current to the battery cell 100A (charging), or enable the battery cell 100A to output current (discharging). The reference pole ear 31 and the second pole ear 21 can constitute the positive and negative poles of another conductive circuit. In other words, the reference pole ear 31 and the second pole ear 21 can cooperate to input current to the battery cell 100A (charging), or enable the battery cell 100A to output current (discharging). Input current refers to the process of charging the phone, and output current refers to the phone being used or left idle. The user using the phone means that the user uses the phone to make calls, browse the web, watch videos, or use communication applets, etc. The phone being left idle specifically means that the phone is not being charged or used by the user, and the power consumed by the phone is very low.

[0102] In addition, the reference electrode tab 31 can also be used to obtain the real potential of the first electrode piece 10 during the input current or output current process, and to obtain the real potential of the second electrode piece 20 during the input current or output current process.

[0103] In other embodiments, the specific number of the conductive loops may also be three, four, etc. For example, when the number of the first pole tabs 11 of the battery cell 100A that are visible from the outside is two, or when the number of the second pole tabs 21 of the battery cell 100A that are visible from the outside is two, the number of the conductive loops may be two or three.

[0104] In other embodiments, the reference electrode 30 is made of the same material as the second electrode 20, or the material of the reference electrode 30 is different from that of the second electrode 20, but the reference electrode 30 is made of a material that can be used as a negative electrode. Then the reference electrode 30 can be used as a negative electrode to participate in the charge and discharge reaction, thereby improving the storage capacity of the bare battery cell. Specifically, the first pole ear 11 and the second pole ear 21 can constitute the positive and negative poles of a conductive circuit, and the reference pole ear 31 and the first pole ear 11 can constitute the positive and negative poles of another conductive circuit. In this embodiment, the number of conductive circuits is two. In other embodiments, the specific number of conductive circuits can also be three, four, and so on. For example, when the number of first pole ears 11 in a visible state from the appearance of the battery cell 100A is two, or the number of second pole ears 21 in a visible state from the appearance of the battery cell 100A is two, the number of conductive circuits can be two or three.

[0105] It can be understood that in other embodiments, the reference electrode 30 is made of a material that can be used as a positive electrode or a negative electrode, but the reference electrode 30 may not participate in charging and discharging. In this case, the reference electrode 30 has a stable potential, and the reference electrode 30 is only used to assist in obtaining the real potential of the first electrode 10 and the second electrode 20 during the battery charging and discharging process. Alternatively, the reference electrode 30 only includes a reference current collector layer. In this case, the reference electrode 30 does not participate in charging and discharging, and is only used to assist in obtaining the real potential of the first electrode 10 and the second electrode 20 during the battery charging and discharging process.

[0106] In this embodiment, the reference electrode 30 is made of the same material as the first electrode 10, or the material of the reference electrode 30 is different from that of the first electrode 10, but the reference electrode 30 is made of a material that can be used as a positive electrode. Then the reference electrode 30 can be used as a positive electrode to participate in the charge and discharge reaction, thereby improving the storage capacity of the bare battery cell. From the appearance, the number of visible tabs of the battery cell 100A is three. The three tabs are a first tab 11, a second tab 21, and a reference tab 31.

[0107] The battery 100 has two conductive circuits, which are the first conductive circuit and the second conductive circuit. The first pole ear 11 and the second pole ear 21 constitute the positive and negative poles of the first conductive circuit. Specifically, the first pole ear 11 is the positive pole of the first conductive circuit, and the second pole ear 21 is the negative pole of the first conductive circuit. The second pole ear 21 and the reference pole ear 31 constitute the positive and negative poles of the second conductive circuit. Specifically, the reference pole ear 31 is the positive pole of the second conductive circuit, and the second pole ear 21 is the negative pole of the second conductive circuit. That is, the first conductive circuit and the second conductive circuit share the second pole ear 21 as the negative pole, and the positive poles of the first conductive circuit and the second conductive circuit are the first pole ear 11 and the reference pole ear 31, respectively. As can be seen from the above, the reference electrode 30 also participates in charging and discharging, which increases the capacity of the battery 100. The following is a detailed description of a specific embodiment of a bare cell having the above two conductive circuits.

[0108] See also Figure 5 and Figure 6 , Figure 5 yes Figure 2 A schematic structural diagram of an embodiment of a bare cell of a battery shown in FIG. Figure 6 yes Figure 5 Schematic diagram of the split structure of the bare battery cell shown in.

[0109] In a specific embodiment, the bare cell 110 has a total of 5 layers, and the bare cell 110 includes a reference electrode 30, an isolation film 40, a second electrode 20, an isolation film 40, and a first electrode 10 stacked in sequence along the Z-axis direction. The battery 100 has three tabs. The second tab 21 is located between the first tab 11 and the reference tab 31.

[0110] Among them, the reference electrode 30 is located at the top layer of the bare battery cell 110, and the shape of the reference electrode 30 is the same as that of the first electrode 10. The reference electrode 30 includes a reference current collector layer and a reference active layer, and the material of the reference current collector layer is the same as that of the first current collector layer. The material of the reference active layer is the same as that of the first active layer. In other words, the shape and material of the reference electrode 30 are respectively the same as those of the first electrode 10.

[0111] In addition, the reference electrode 30 can participate in the charging and discharging process as a positive electrode, so that the battery 100 has two conductive circuits, wherein the first pole piece 11 and the second pole piece 21 constitute the positive and negative poles of one conductive circuit, and the second pole piece 21 and the reference pole piece 31 constitute the positive and negative poles of another conductive circuit. The first conductive circuit and the second conductive circuit share the second pole piece 21 as the negative pole, and the second pole piece 21 is located between the first pole piece 11 and the reference pole piece 31 for easy connection. As a result, the capacity of the battery 100 is increased, the heat generation during the charging and discharging process is reduced, and the charging efficiency is improved. The reference pole piece 30 can also facilitate real-time monitoring of the real potential of the first pole piece 10 and the second pole piece 20, so as to monitor various parameters of the battery 100, reduce damage to the battery 100 during the charging and discharging process, delay the attenuation of the capacity of the battery 100, and increase the service life of the battery 100.

[0112] The following explains the calculation method of the real potential of the first electrode 10 and the real potential of the second electrode 20 in the first specific embodiment. The first electrode 11, the second electrode 21 and the reference electrode 31 are all connected to the battery management unit through the protection circuit board and the main circuit board. In the first specific embodiment, the reference electrode 30 participates in the charging and discharging of the battery, and the potential of the reference electrode 30 will change with the change of the characteristic parameters of the battery. Therefore, the corresponding relationship between the potential of the reference electrode 30 and the characteristic parameters of the battery 100 is pre-stored in the memory of the electronic device, and the characteristic parameters of the battery 100 include the characteristic parameters of each circuit of the battery. When the user uses the mobile phone normally later, after detecting that the reference electrode 30 participates in the charging and discharging process, the battery manager will detect the characteristic parameters of the battery 100 in real time, and combine the characteristic parameters queried in the memory to obtain the corresponding potential of the reference electrode 30. The potential of the reference electrode 30 is refreshed in real time, and the refresh frequency is formulated according to the actual working conditions of the whole machine, which can be 1 millisecond / time, 1 second / time, 1 minute / time, 1 hour / time, etc. Then, based on the detected voltage between the reference electrode 31 and the second electrode 21, the voltage between the first electrode 11 and the second electrode 21, and the potential of the reference electrode 30, the real potential of the first electrode 10 and the real potential of the second electrode 20 are obtained by combining calculation and table lookup.

[0113] The corresponding relationship between the potential of the reference electrode 30 and the characteristic parameter of the battery 100 is obtained in the following manner.

[0114] First of all, it is stated that the characteristic parameters corresponding to the battery 100 and each conductive circuit include but are not limited to the number of charge and discharge times, battery temperature, current, voltage, charge and discharge time, internal resistance, etc. Other battery-related electrochemical parameters are not listed here one by one. Here, the number of charge and discharge times, battery temperature, voltage, and current are used as the main characteristic parameters for explanation. When the user uses the mobile phone normally, both the first conductive circuit and the second conductive circuit will be charged and discharged. With the change of the number of charge and discharge times, battery temperature, current and voltage of the second conductive circuit (the conductive circuit in which the reference electrode 30 participates in the charge and discharge), the storage capacity of the reference electrode 30 will change, and the potential of the reference electrode 30 will change accordingly. Therefore, before leaving the factory, an experiment can be carried out to obtain the change of the potential of the reference electrode 30 with the change of the number of charge and discharge times, battery temperature, current and voltage, and then the corresponding relationship between the characteristic parameters such as the number of charge and discharge times, battery temperature, current and voltage and the potential of the reference electrode 30 is stored in a table or curve form.

[0115] During the test, the battery is charged and discharged, and then the number of charge and discharge times of the battery is recorded. At the same time, the battery temperature, current and voltage during the charge and discharge process of the battery are detected. Then, the potential of the reference electrode 30 at this time is detected. The potential detection of the reference electrode 30 can be obtained by setting an additional reference electrode, such as a built-in lithium-plated copper wire, a built-in lithium sheet and a battery cell extended by a copper or nickel sheet, and other reference electrode settings commonly used in other industries. Then, the potential of the reference electrode 30 corresponding to the number of charge and discharge times, battery temperature, current and voltage is stored in the memory of the mobile phone in a tabular form. The stored table is shown in Table 1 below.

[0116] Table 1

[0117] Charge and discharge times C1 C2 C3 C4 C5 Current I1 I2 I3 I4 I5 Voltage U1 U2 U3 U4 U5 Battery temperature H1 H2 H3 H4 H5 Potential of the reference electrode V01 V02 V03 V04 V05

[0118] The above correspondence relationship can also be stored in a curve form.

[0119] When the user subsequently uses the electronic device normally, the battery manager first obtains the current, voltage, battery temperature and charge and discharge times during the battery charging and discharging process, and then compares the obtained current, voltage, battery temperature and charge and discharge times with the current, voltage, battery temperature and charge and discharge times in Table 1. For example, if the charge and discharge times are C1, the current is I1, the voltage is U1, and the battery temperature is H1, then the potential of the reference electrode 30 can be obtained from Table 1 as V01.

[0120] In this embodiment, the battery manager then uses the acquired potential V01 of the reference electrode 30, the detected voltage V1 between the first electrode tab 11 and the second electrode tab 21 in the first conductive loop, and the detected voltage V2 between the second electrode tab 21 and the reference electrode tab 31 in the second conductive loop to calculate the true potential of the first electrode 10 and the true potential of the second electrode 20.

[0121] Specifically, the real potential V- of the second electrode piece 20 is calculated based on the voltage V2 between the second electrode piece 21 and the reference electrode piece 31 and the real potential V01 of the reference electrode piece 31. Since the voltage of the battery is equal to the difference between the positive electrode potential and the negative electrode potential of the battery, it can be known that: V2 = V01-V-. Therefore, the real potential of the second electrode piece 20 is the difference between the real potential V01 of the reference electrode piece 31 and the voltage V2 between the second electrode piece 21 and the reference electrode piece 31, that is, V- = V01-V2. At this point, the real potential V- of the second electrode piece 20 is calculated.

[0122] The real potential V+ of the first electrode piece 10 is calculated based on the voltage V1 between the first electrode piece 11 and the second electrode piece 21 and the real potential V- of the second electrode piece 20. Since the voltage of the battery is equal to the difference between the positive electrode potential and the negative electrode potential of the battery, it can be known that: V1 = V+-V-. Therefore, the real potential of the first electrode piece 10 is the sum of the voltage V1 between the first electrode piece 11 and the second electrode piece 21 and the real potential V- of the second electrode piece 20, that is, V+ = V1 + V-. At this point, the real potential V+ of the first electrode piece 10 is calculated.

[0123] In other embodiments, the calculated real potential of the first electrode 10 and the real potential of the second electrode 20 can also be stored in the memory of the mobile phone before leaving the factory. When the user uses the electronic device normally later, the battery manager can directly look up the table to obtain the real potential V+ of the first electrode 10 and the real potential V- of the second electrode 20.

[0124] During the battery charging and discharging process, the voltage V1 between the first pole ear 11 and the second pole ear 21 is in a changing state, so there are multiple V1s; the voltage V2 between the second pole ear 21 and the reference pole ear 31 is in a changing state, so there are multiple V2s. The multiple V+s and multiple V-s calculated based on V0, multiple V1s and multiple V2s are stored in the mobile phone's memory in a table according to the corresponding relationship. The V+ and V- calculated based on V0, V1 and V2 are also stored in the mobile phone's memory. Later, when the mobile phone is used normally, when the battery manager detects the voltage V1 and the voltage V2, it can directly look up the table to obtain the corresponding real potential V+ of the first pole ear 11 and the real potential V- of the second pole ear 21.

[0125] For example, multiple V1s are V11, V12, V13, V14, V15, etc., and multiple V2s are V21, V22, V23, V24, V25, etc. The corresponding calculated multiple V+s are V+1, V+2, V+3, V+4, V+5, etc., and the calculated multiple V-s are V-1, V-2, V-3, V-4, V-5, etc. Then the following Table 2 and Table 3 are generated.

[0126] Table 2

[0127] The voltage V2 between the second electrode and the reference electrode V21 V22 V23 V24 V25 ...... The real potential of the second electrode V- V-1 V-2 V-3 V-4 V-5 ......

[0128] Table 3

[0129] The voltage V1 between the first electrode and the second electrode V11 V12 V13 V14 V15 ...... The real potential of the second electrode V- V-1 V-2 V-3 V-4 V-5 ...... The real potential of the first electrode is V+ V+1 V+2 V+3 V+4 V+5 ......

[0130] The corresponding relationships in Table 2 and Table 3 above may also be stored in a curve form.

[0131] It is understandable that as the potential of the reference electrode 30 changes, the corresponding real potential of the first electrode 10 and the real potential of the second electrode 20 will also change. Therefore, it is necessary to store multiple of the above-mentioned Table 2 and Table 3 as the potential of the reference electrode 30 changes.

[0132] In this embodiment, Table 1 is used to query the potential of the reference electrode 30 , Table 2 is used to query the real potential of the second electrode 20 , and Table 3 is used to query the real potential of the first electrode 10 .

[0133] The specific usage of the table is as follows: the number of charge and discharge times is C1, the current is I1, the voltage is U1, and the battery temperature is H1, then the potential of the reference electrode 30 can be obtained from Table 1 as V01. When the potential of the reference electrode 30 is V01, the corresponding table of the real potential of the second electrode 20 is Table 2, and the corresponding table of the real potential of the first electrode 10 is Table 3. The battery manager detects that the voltage between the reference electrode 31 and the second electrode 21 is V23, and then queries Table 2 to know that the real potential of the second electrode 20 is V-3. Then query Table 3 to know that the real potential of the first electrode 10 is V+3.

[0134] In other embodiments, only Table 1 and Table 2 are stored in the mobile phone. Therefore, after the real potential of the second electrode 20 is queried through Table 1 and Table 2, the real potential of the first electrode 10 can be obtained by calculation to reduce the amount of data storage.

[0135] It is understandable that, due to the polarization phenomenon of the battery 100, the calculated real potential of the first electrode 10 and the real potential of the second electrode 20 need to take into account the polarization voltage. The polarization voltage will also change with the voltage and current. Therefore, in this embodiment, the corresponding relationship between the polarization voltage and the voltage and current will be stored in the memory of the mobile phone synchronously, without affecting the potential result obtained by looking up the table.

[0136] In the first specific implementation, the reference electrode 30 may not participate in the charging and discharging process of the battery. At this time, the potential V01 of the reference electrode 30 is in a stable state, and the potential V01 of the reference electrode 30 is stored in the memory of the mobile phone. When the user uses the mobile phone normally later, the battery manager directly obtains the potential V01 of the reference electrode 30 in the memory. The first pole tab 11, the second pole tab 21 and the reference pole tab 31 are all connected to the battery management unit, so the battery manager can also obtain the voltage V1 between the reference pole tab 31 and the second pole tab 21, and obtain the voltage V2 between the first pole tab 11 and the second pole tab 21. The battery manager then uses the obtained potential V01 of the reference electrode 30, the detected voltage V1 between the first pole tab 11 and the second pole tab 21 in the first conductive loop, and the voltage V2 between the second pole tab 21 and the reference pole tab 31 in the second conductive loop to calculate the real potential of the first pole tab 10 and the real potential of the second pole tab 20.

[0137] Specifically, the real potential V- of the second electrode piece 20 is calculated based on the voltage V2 between the second electrode piece 21 and the reference electrode piece 31 and the real potential V01 of the reference electrode piece 31. Since the voltage of the battery is equal to the difference between the positive electrode potential and the negative electrode potential of the battery, it can be known that: V2 = V01-V-. Therefore, the real potential of the second electrode piece 20 is the difference between the real potential V01 of the reference electrode piece 31 and the voltage V2 between the second electrode piece 21 and the reference electrode piece 31, that is, V- = V01-V2. At this point, the real potential V- of the second electrode piece 20 is calculated.

[0138] The real potential V+ of the first electrode piece 10 is calculated based on the voltage V1 between the first electrode piece 11 and the second electrode piece 21 and the real potential V- of the second electrode piece 20. Since the voltage of the battery is equal to the difference between the positive electrode potential and the negative electrode potential of the battery, it can be known that: V1 = V+-V-. Therefore, the real potential of the first electrode piece 10 is the sum of the voltage V1 between the first electrode piece 11 and the second electrode piece 21 and the real potential V- of the second electrode piece 20, that is, V+ = V1 + V-. At this point, the real potential V+ of the first electrode piece 10 is calculated.

[0139] In other embodiments, the real potential of the first electrode 10 and the real potential of the second electrode 20 can also be stored in a memory. After the battery manager obtains the voltage V1 between the first electrode tab 11 and the second electrode tab 21 in the first conductive circuit, and the voltage V2 between the second electrode tab 21 and the reference electrode tab 31 in the second conductive circuit, the real potential of the first electrode 10 and the second electrode 20 can be directly queried.

[0140] After the battery management unit learns the true potential of the second pole piece 20, it can determine whether the true potential of the second pole piece 20 is close to or equal to the potential during lithium deposition. If the true potential of the second pole piece 20 is close to or equal to the potential during lithium deposition, and the lithium deposition potential is generally 0, the charging current can be reduced to reduce the risk of lithium deposition from the second pole piece 20. If the true potential of the second pole piece 20 is much greater than the potential when lithium deposition occurs, the charging current can be increased to improve the charging efficiency. It can be seen that in this embodiment, the potential of the second pole piece 21 (negative pole piece) can be monitored in real time, which reduces the risk of lithium deposition while improving the charging efficiency of the battery 100 and extending the service life of the battery 100.

[0141] After the battery management unit learns the true potential of the first electrode 10, it determines whether the true potential of the first electrode 10 is close to or equal to the potential value when the first electrode 10 can withstand the maximum current, which is generally about 4.48 volts. If the true potential of the first electrode 10 is close to or equal to 4.48 volts, the crystal structure on the first active layer of the first electrode 10 may be destroyed. After the crystal structure of the first active layer is destroyed, the capacity of the battery 100 will decay. If the true potential of the first electrode 10 is close to or equal to 4.48 volts, the charging voltage can be reduced, the risk of the first active material layer being damaged can be reduced, the decay of the capacity of the battery 100 can be slowed down, and the service life of the battery 100 can be extended. If the true potential of the first electrode 10 is much less than 4.48 volts, the charging current can be increased to improve the charging efficiency.

[0142] In other embodiments, the reference electrode 30 is made of the same material as the second electrode 20, or the material of the reference electrode 30 is different from that of the second electrode 20, but the reference electrode 30 is made of a material that can be used as a negative electrode. Then the reference electrode 30 can be used as a negative electrode to participate in the charge and discharge reaction, thereby improving the storage capacity of the bare battery cell. From the appearance, the number of visible tabs of the battery cell 100A is three. The three tabs are a first tab 11, a second tab 21, and a reference tab 31.

[0143] The battery 100 has two conductive circuits, which are the first conductive circuit and the second conductive circuit. The first pole ear 11 and the second pole ear 21 constitute the positive and negative poles of the first conductive circuit. Specifically, the first pole ear 11 is the positive pole of the first conductive circuit, and the second pole ear 21 is the negative pole of the first conductive circuit. The first pole ear 11 and the reference pole ear 31 constitute the positive and negative poles of the second conductive circuit. Specifically, the first pole ear 11 is the positive pole of the second conductive circuit, and the reference pole ear 31 is the negative pole of the second conductive circuit. That is, the first conductive circuit and the second conductive circuit share the first pole ear 11 as the positive pole, and the negative poles of the first conductive circuit and the second conductive circuit are the second pole ear 21 and the reference pole ear 31, respectively. Therefore, the reference pole sheet 30 also participates in charging and discharging, thereby increasing the capacity of the battery 100. The following describes in detail two specific embodiments of bare cells having the above two conductive circuits.

[0144] See also Figure 7 and Figure 8 , Figure 7 yes Figure 2 A schematic structural diagram of a second embodiment of a bare cell of a battery shown in FIG. Figure 8 yes Figure 7 Schematic diagram of the split structure of the bare battery cell shown in.

[0145] In the second specific embodiment, the bare cell 110 has a total of 7 layers, and the bare cell 110 includes a first pole piece 10, a separator 40, a reference pole piece 30, a separator 40, a first pole piece 10, a separator 40, and a second pole piece 20 stacked in sequence along the Z-axis direction. The battery 100 has three tabs, and the first tab 11 is located between the second tab 21 and the reference tab 31.

[0146] Among them, the reference electrode 30 is located in the third layer of the bare battery cell 110, and the shape of the reference electrode 30 is the same as that of the second electrode 20. The reference electrode 30 includes a reference current collector layer and a reference active layer, and the material of the reference current collector layer is the same as that of the second current collector layer. The material of the reference active layer is the same as that of the second active layer. In other words, the shape and material of the reference electrode 30 are respectively the same as those of the second electrode 20, and the reference electrode 30 is stacked between the two first electrode sheets 10, and an isolation film 40 is provided between the reference electrode 30 and the two adjacent first electrode sheets 10.

[0147] In addition, the reference electrode 30 can participate in the charging and discharging process as a negative electrode, so that the battery 100 has two conductive circuits. Among them, the first pole ear 11 and the second pole ear 21 constitute the positive and negative poles of a conductive circuit, and the first pole ear 11 and the reference pole ear 31 constitute the positive and negative poles of another conductive circuit. The first conductive circuit and the second conductive circuit share the first pole ear 11 as the positive pole, and the first pole ear 11 is located between the second pole ear 21 and the reference pole ear 31, which is convenient for connection. As a result, the capacity of the battery 100 is increased, the heat generation during the charging and discharging process is reduced, and the charging efficiency is improved. The reference pole piece 30 can also facilitate real-time monitoring of the real potential of the first pole ear 11 and the second pole piece 20, so as to monitor various parameters of the battery 100, reduce damage to the battery 100 during the charging and discharging process, delay the attenuation of the capacity of the battery 100, and increase the service life of the battery 100. In this embodiment, the calculation method of the real potential of the first pole piece 10 and the second pole piece 20 refers to the first embodiment, which will not be repeated here.

[0148] In other embodiments, the reference electrode 30 is made of the same material as the second electrode 20, or the reference electrode 30 is made of a material that can be used as a negative electrode, although the material is different from that of the second electrode 20. The reference electrode 30 can participate in the charging and discharging process as a negative electrode.

[0149] From the appearance, the number of visible tabs of the battery cell 100A is four. The battery 100 includes a plurality of first pole pieces 10. The first pole pieces 11 of some of the first pole pieces 10 can be arranged to be located on the right side of the central axis O1 (towards the positive direction of the X-axis), and the first pole pieces 11 of another portion of the first pole pieces 10 can be arranged to be located on the left side of the central axis O1 (towards the negative direction of the X-axis). The plurality of first pole pieces 11 located on the right side of the central axis O1 (towards the positive direction of the X-axis) are welded into an integral structure, and the plurality of first pole pieces 11 located on the left side of the central axis O1 (towards the negative direction of the X-axis) are welded into an integral structure. The four pole pieces are two first pole pieces 11, one second pole piece 21, and one reference pole piece 31.

[0150] At this time, the battery 100 has two conductive circuits, which are the first conductive circuit and the second conductive circuit. The first pole ear 11 and the second pole ear 21 located on the right side of the central axis O1 (towards the positive direction of the X-axis) constitute the positive and negative poles of the first conductive circuit. Specifically, the first pole ear 11 located on the right side of the central axis O1 (towards the positive direction of the X-axis) is the positive pole of the first conductive circuit, and the second pole ear 21 is the negative pole of the first conductive circuit. The first pole ear 11 and the reference pole ear 31 located on the left side of the central axis O1 (towards the negative direction of the X-axis) constitute the positive and negative poles of the second conductive circuit. Specifically, the first pole ear 11 located on the left side of the central axis O1 (towards the negative direction of the X-axis) is the positive pole of the second conductive circuit, and the reference pole ear 31 is the negative pole of the second conductive circuit. The positive and negative poles of the two conductive circuits are different, which can reduce the heat generation during the charging and discharging process of the battery. The following is a detailed description of the specific implementation of two bare cells with the above two conductive circuits.

[0151] See also Fig. 9 and Fig.10 , Fig. 9 yes Figure 2 A schematic structural diagram of a third embodiment of a bare cell of a battery shown in FIG. Fig.10 yes Fig. 9 Schematic diagram of the split structure of the bare battery cell shown in.

[0152] In the third specific embodiment, the bare cell 110 has a total of 7 layers, and the bare cell 110 includes a first pole piece 10, an isolation film 40, a second pole piece 20, an isolation film 40, a first pole piece 10, an isolation film 40, and a reference pole piece 30 stacked in sequence along the Z-axis direction. The first pole ear 11 of the first pole piece 10 of the first layer is located on the right side of one side edge of the first pole piece 10 along the central axis O1 (towards the positive direction of the X-axis), and the first pole ear 11 of the first pole piece 10 of the fifth layer is located on the left side of one side edge of the first pole piece 10 along the central axis O1 (towards the negative direction of the X-axis). The second pole ear 21 of the second pole piece 20 is located on the left side of one side edge of the second pole piece 20 along the central axis O1 (towards the negative direction of the X-axis). The reference pole ear 31 is located on the right side of one side edge of the reference pole piece 30 along the central axis O1. The number of pole ears in the visible state of the battery 100 is four. The four pole ears include two first pole ears 11, one second pole ear 21, and one reference pole ear 31. The second pole tab 21 and the reference pole tab 31 are located between the two first pole tabs 11. The four pole tabs are arranged from left to right in the following order: the first pole tab 11, the second pole tab 21, the reference pole tab 31, and the first pole tab 11.

[0153] The reference electrode 30 is located at the bottom layer of the bare cell 110, and the shape of the reference electrode 30 is the same as that of the second electrode 20. The reference electrode 30 includes a reference current collector layer and a reference active layer, and the material of the reference current collector layer is the same as that of the second current collector layer. The material of the reference active layer is the same as that of the second active layer.

[0154] The reference electrode 30 can be used as a negative electrode to participate in the charging and discharging process, so that the battery 100 has two conductive circuits. The first electrode tab 11 and the second electrode tab 21 located on the right side of the central axis O1 (towards the positive direction of the X-axis) constitute the positive and negative poles of one conductive circuit, and the first electrode tab 11 and the reference electrode tab 31 located on the left side of the central axis O1 (towards the negative direction of the X-axis) constitute the positive and negative poles of another conductive circuit. The positive and negative poles of the two conductive circuits are different, which can reduce the heat generation during the charging and discharging process of the battery. The two conductive circuits participate in the charging and discharging of the battery 100, which can improve the charging efficiency, reduce the heat generation of the battery 100, delay the attenuation of the capacity of the battery 100, and increase the service life of the battery 100. In this embodiment, the method for calculating the real potential of the first electrode 10 and the second electrode 20 refers to the first embodiment, which will not be repeated here.

[0155] See also Fig.11 and Fig.12 , Fig.11 yes Figure 2 A schematic structural diagram of a fourth embodiment of a bare cell of a battery shown in FIG. Fig.12 yes Fig.11 Schematic diagram of the split structure of the bare battery cell shown in.

[0156] In the fourth specific embodiment, the bare cell 110 has a total of 13 layers, and the bare cell 110 includes a first pole piece 10, an isolation film 40, a reference pole piece 30, an isolation film 40, a first pole piece 10, an isolation film 40, a second pole piece 20, an isolation film 40, a first pole piece 10, an isolation film 40, a second pole piece 20, an isolation film 40, and a first pole piece 10, which are sequentially layered along the Z-axis direction. The first pole ear 11 of the first pole piece 10 of the first layer and the ninth layer is located on the right side of one side of the first pole piece 10. The first pole ear 11 of the first pole piece 10 of the fifth layer and the thirteenth layer is located on the left side of one side of the first pole piece 10. The second pole ear 21 is located on the right side of one side of the second pole piece 20. The reference pole ear 31 is located on the left side of one side of the reference pole piece 30. The number of pole ears in the visible state of the battery 100 is four. The four pole ears include two first pole ears 11, one second pole ear 21, and one reference pole ear 31. The second pole tab 21 and the reference pole tab 31 are located between the two first pole tabs 11. The four pole tabs are arranged from left to right in the following order: the first pole tab 11, the reference pole tab 31, the second pole tab 21, and the first pole tab 11.

[0157] The reference electrode 30 is located in the third layer of the bare cell 110, and the shape and size of the reference electrode 30 are the same as those of the second electrode 20. The reference electrode 30 includes a reference current collector layer and a reference active layer, and the material of the reference current collector layer is the same as that of the second current collector layer. The material of the reference active layer is the same as that of the second active layer.

[0158] The reference electrode 30 can participate in the charging and discharging process as a negative electrode, so that the battery 100 has two conductive circuits. The first electrode 11 and the second electrode 21 located on the right side of the central axis O1 constitute the positive and negative poles of a conductive circuit, and the first electrode 11 and the reference electrode 31 located on the left side of the central axis O1 constitute the positive and negative poles of another conductive circuit. The positive and negative poles of the two conductive circuits are different, which can reduce the heat generation during the charging and discharging process of the battery. The two conductive circuits participate in the charging and discharging of the battery 100, which can improve the charging efficiency, reduce the heat generation of the battery 100, delay the attenuation of the capacity of the battery 100, and increase the service life of the battery 100. In this embodiment, the method for calculating the real potential of the first electrode 10 and the second electrode 20 refers to the first embodiment and will not be repeated here.

[0159] In other embodiments, the reference electrode 30 is made of the same material as the first electrode 10, or the material of the reference electrode 30 is different from that of the first electrode 10, but the reference electrode 30 is made of a material that can be used as a positive electrode. Then, the reference electrode 30 can be used as a positive electrode to participate in the charge and discharge reaction, thereby improving the storage capacity of the bare battery cell.

[0160] From the appearance, the number of visible tabs of the battery cell 100A is four. The battery 100 includes a plurality of first pole pieces 10, wherein the first pole piece 11 of the first pole piece 10 of the first part is located on the right side of the central axis O1 (towards the positive direction of the X-axis), and the first pole piece 11 of the second part is located on the negative direction of the X-axis. The plurality of first pole pieces 11 located on the right side of the central axis O1 (towards the positive direction of the X-axis) are aligned and welded into an integral structure, and the plurality of first pole pieces 11 located on the left side of the central axis O1 (towards the negative direction of the X-axis) are aligned and welded into an integral structure. The four pole pieces are two first pole pieces 11, one second pole piece 21, and one reference pole piece 31.

[0161] At this time, the battery 100 has three conductive circuits, which are the first conductive circuit, the second conductive circuit and the third conductive circuit. The first pole ear 11 located on the right side of the central axis O1 (towards the positive direction of the X-axis) can constitute the positive and negative poles of the first conductive circuit with the second pole ear 21, the first pole ear 11 located on the left side of the central axis O1 (towards the negative direction of the X-axis) can constitute the positive and negative poles of the second conductive circuit with the second pole ear 21, and the reference pole ear 31 and the second pole ear 21 constitute the positive and negative poles of the third conductive circuit. At this time, the three conductive circuits share the second pole ear 21 as the negative pole, wherein the positive poles of the first conductive circuit and the second conductive circuit are two first pole ears 11 respectively, and the positive pole of the third conductive circuit is the reference pole ear 31. The three conductive circuits make the battery more efficient in charge and discharge. The following is a detailed description of the specific implementation of three bare cells with the above three conductive circuits.

[0162] See also Fig.13 and Fig.14 , Fig.13 yes Figure 2 A schematic structural diagram of a fifth embodiment of a bare cell of a battery shown in FIG. Fig.14 yes Fig.13 Schematic diagram of the split structure of the bare battery cell shown in.

[0163] In the fifth specific embodiment, the bare cell 110 has a total of 9 layers, and the bare cell 110 includes a first pole piece 10, an isolation film 40, a second pole piece 20, an isolation film 40, a reference pole piece 30, an isolation film 40, a second pole piece 20, an isolation film 40, and a first pole piece 10 stacked in sequence along the Z-axis direction. The first pole ear 11 of the first pole piece 10 of the first layer is located on the right side of the central axis O1 (towards the positive direction of the X-axis), and the first pole ear 11 of the first pole piece 10 of the ninth layer is located on the left side of the central axis O1 (towards the negative direction of the X-axis). The second pole ears 21 of the two second pole pieces 20 are both located on the right side of one side edge of the second pole piece 20 along the central axis O1, and the two second pole ears 21 are aligned and welded into one. The reference pole ear 31 of the reference pole piece 30 is located on the left side of one side edge of the reference pole piece 30 along the central axis O1. The number of tabs visible on the appearance of the battery 100 is four, and the four tabs include two first tabs 11, one second tab 21, and one reference tab 31. The second tab 21 and the reference tab 31 are located between the two first tabs 11. The four tabs are arranged from left to right in the following order: first tab 11, reference tab 31, second tab 21, first tab 11.

[0164] The reference electrode 30 is located on the fifth layer of the bare battery core 110. The shape and material of the reference electrode 30 are the same as those of the first electrode 10.

[0165] The reference electrode 30 can be used as a positive electrode to participate in the charging and discharging process, so that the battery 100 has three conductive loops. Among them, the first pole ear 11 and the second pole ear 21 located on the right side of the central axis O1 (towards the positive direction of the X axis) constitute the positive and negative poles of the first conductive loop, the first pole ear 11 and the second pole ear 21 located on the left side of the central axis O1 (towards the negative direction of the X axis) constitute the positive and negative poles of the second conductive loop, and the reference pole ear 31 and the second pole ear 21 constitute the positive and negative poles of the third conductive loop. That is, the three conductive loops share the second pole ear 21 as the negative pole. The three conductive loops make the battery charging efficiency higher and the heat generation lower. And increase the capacity of the battery 100, reduce the heat generation during the charging and discharging process, and improve the charging efficiency. The reference pole piece 30 can also facilitate real-time monitoring of the real potential of the first pole ear 11 and the second pole piece 20, so as to monitor various parameters of the battery 100, reduce the damage to the battery 100 during the charging and discharging process, delay the attenuation of the capacity of the battery 100, and increase the service life of the battery 100. In this embodiment, the method for calculating the real potential of the first electrode piece 10 and the second electrode piece 20 refers to the first embodiment and will not be repeated here.

[0166] See also Fig.15 and Fig.16 , Fig.15 yes Figure 2 A schematic structural diagram of a sixth embodiment of a bare cell of a battery shown in FIG. Fig.16 yes Fig.15 Schematic diagram of the split structure of the bare battery cell shown in.

[0167] In the sixth specific embodiment, the bare cell 110 has a total of 13 layers, and the bare cell 110 includes a reference electrode 30, an isolation film 40, a second electrode 20, an isolation film 40, a first electrode 10, an isolation film 40, a second electrode 20, an isolation film 40, a first electrode 10, an isolation film 40, a second electrode 20, an isolation film 40, and a first electrode 10 stacked in sequence along the Z-axis direction. The first pole ear 11 of the first pole piece 10 of the ninth layer is located on the right side of the central axis O1, and the first pole ear 11 of the first pole piece 10 of the fifth and thirteenth layers is located on the left side of the central axis O1. The second pole ears 21 of the three second pole pieces 20 are all located on the right side of the central axis O1, and the three second pole ears 21 are aligned and welded into one. The reference pole ear 31 of the reference pole piece 30 is located on the right side of the central axis O1 of the reference pole piece 30. The battery 100 has four visible tabs, including two first tabs 11, one second tab 21, and one reference tab 31. The four tabs are arranged from left to right in the following order: first tab 11, second tab 21, first tab 11, reference tab 31.

[0168] The reference electrode 30 is located at the top layer, and the shape and material of the reference electrode 30 are the same as those of the first electrode 10. The reference electrode 30 also participates in the charging and discharging process. The sixth specific embodiment is the same as the fifth specific embodiment in that the electrode ear forms a conductive loop, which will not be repeated.

[0169] See also Fig.17 and Fig.18 , Fig.17 yes Figure 2 A schematic structural diagram of a seventh embodiment of a bare cell of a battery shown in FIG. Fig.18 yes Fig.17 Schematic diagram of the split structure of the bare battery cell shown in.

[0170] In the seventh specific embodiment, the bare cell 110 has a total of 13 layers, and the bare cell 110 includes a first pole piece 10, an isolation film 40, a second pole piece 20, an isolation film 40, a reference pole piece 30, an isolation film 40, a second pole piece 20, an isolation film 40, a first pole piece 10, an isolation film 40, a second pole piece 20, an isolation film 40, and a first pole piece 10 stacked in sequence along the Z-axis direction. The first pole piece 10 of the first layer and the ninth layer has a first pole piece 10 located on the right side of the central axis O1, and the first pole piece 10 of the thirteenth layer has a first pole piece 10 located on the left side of the central axis O1. The second pole pieces 21 of the three second pole pieces 20 are all located on the right side of the central axis O1, and the three second pole pieces 21 are aligned and welded into one. The reference pole piece 31 of the reference pole piece 30 is located on the left side of the central axis O1 of the reference pole piece 30. The battery 100 has four visible pole tabs, which include two first pole tabs 11 , one second pole tab 21 , and one reference pole tab 31 .

[0171] The shape and material of the reference electrode 30 are the same as those of the first electrode 10. The reference electrode 30 also participates in the charging and discharging process.

[0172] The difference from the sixth specific embodiment is that the reference electrode 30 is located in the fifth layer, and the reference electrode tab 31 of the reference electrode 30 is located on the left side of the central axis O1. The second electrode tab 21 is located on the left side of the central axis O1. The four electrode tabs are arranged from left to right in the following order: reference electrode tab 31, first electrode tab 11, second electrode tab 21, first electrode tab 11.

[0173] In other embodiments, the reference electrode 30 is made of the same material as the first electrode 10, or the material of the reference electrode 30 is different from that of the first electrode 10, but the reference electrode 30 is made of a material that can be used as a positive electrode. Then, the reference electrode 30 can be used as a positive electrode to participate in the charge and discharge reaction, thereby improving the storage capacity of the bare battery cell.

[0174] From the appearance, the number of visible tabs of the battery cell 100A is four. The battery 100 includes a plurality of second pole pieces 20, the second pole piece 21 of the first part of the second pole piece 20 is located on the right side of the central axis O1 (towards the positive direction of the X-axis), and the second pole piece 21 of the second part of the second pole piece 20 is located on the left side of the central axis O1 (towards the negative direction of the X-axis). The plurality of second pole pieces 21 located on the right side of the central axis O1 (towards the positive direction of the X-axis) are welded into an integral structure, and the plurality of second pole pieces 21 located in the negative direction of the X-axis are welded into an integral structure. The four pole pieces are a first pole piece 11, two second pole pieces 21, and a reference pole piece 31.

[0175] At this time, the battery 100 has two conductive circuits, which are the first conductive circuit and the second conductive circuit. The second pole ear 21 located on the right side of the central axis O1 (towards the positive direction of the X-axis) can constitute the positive and negative poles of the first conductive circuit with the first pole ear 11, and the second pole ear 21 located on the left side of the central axis O1 (towards the negative direction of the X-axis) can constitute the positive and negative poles of the second conductive circuit with the reference pole ear 31. Specifically, the positive pole of the first conductive circuit is the first pole ear 11, and the negative pole of the first conductive circuit is one of the second pole ears 21. The positive pole of the second conductive circuit is the reference pole ear 31, and the negative pole of the second conductive circuit is another of the second pole ears 21. The positive pole and negative pole of the first conductive circuit and the second conductive circuit are different, which can reduce the heat generation during the charging and discharging process of the battery, improve the charging efficiency, and extend the battery life. The following is a detailed description of a specific embodiment of a bare battery cell having the above two conductive circuits.

[0176] See also Fig.19 and Fig. 20 , Fig.19 yes Figure 2 Schematic diagram of the structure of an eighth embodiment of a bare cell of a battery shown in FIG. Fig. 20 yes Fig.19 Schematic diagram of the split structure of the bare battery cell shown in.

[0177] In the eighth specific embodiment, the bare cell 110 has a total of 13 layers, including a second pole piece 20, an isolation film 40, a reference pole piece 30, an isolation film 40, a second pole piece 20, an isolation film 40, a first pole piece 10, an isolation film 40, a second pole piece 20, an isolation film 40, a first pole piece 10, an isolation film 40, and a second pole piece 20 stacked in sequence along the Z-axis direction. The second pole piece 21 of the first layer and the ninth layer of the second pole piece 20 is located on the right side of one side edge of the second pole piece 20 along the central axis O1 (towards the positive direction of the X-axis), and the second pole piece 21 of the fifth layer and the thirteenth layer of the second pole piece 20 is located on the left side of one side edge of the second pole piece 20 along the central axis O1 (towards the negative direction of the X-axis). The first pole piece 11 of the first pole piece 10 is located on the left side of one side edge of the first pole piece 10 along the central axis O1, and the reference pole piece 31 of the reference pole piece 30 is located on the right side of one side edge of the reference pole piece 30 along the central axis O1. The battery cell 100A has four visible tabs, which are a first tab 11, two second tabs 21, and a reference tab 31. The first tab 11 and the reference tab 31 are located between the two second tabs 21, and the four tabs are arranged from left to right in the following order: second tab 21, first tab 11, reference tab 31, and second tab 21.

[0178] The reference electrode 30 is located in the third layer of the bare cell 110, and the shape of the reference electrode 30 is the same as that of the first electrode 10. The reference electrode 30 includes a reference current collector layer and a reference active layer, and the material of the reference current collector layer is the same as that of the first current collector layer. The material of the reference active layer is the same as that of the first active layer.

[0179] The reference electrode 30 can be used as a positive electrode to participate in the charging and discharging process, so that the battery 100 has two conductive loops. Among them, the second pole ear 21 located on the right side of the central axis O1 (towards the positive direction of the X-axis) can constitute the positive and negative poles of the first conductive loop with the first pole ear 11, and the second pole ear 21 located on the left side of the central axis O1 (towards the negative direction of the X-axis) can constitute the positive and negative poles of the second conductive loop with the reference pole ear 31. Specifically, the positive pole of the first conductive loop is the first pole ear 11, and the negative pole of the first conductive loop is one of the second pole ears 21. The positive pole of the second conductive loop is the reference pole ear 31, and the negative pole of the second conductive loop is another of the second pole ears 21. The positive pole and negative pole of the first conductive loop and the second conductive loop are different, which can reduce the heat generation during the charging and discharging process of the battery, improve the charging efficiency, and extend the battery life. In this embodiment, the method for calculating the real potential of the first pole sheet 10 and the second pole sheet 20 refers to the first embodiment, which will not be repeated here.

[0180] In other embodiments, the reference electrode 30 is made of the same material as the second electrode 20, or the reference electrode 30 is made of a material that can be used as a negative electrode, although the material is different from that of the second electrode 20. Then, the reference electrode 30 can participate in the charging reaction as a negative electrode, thereby improving the storage capacity of the bare battery cell.

[0181] From the appearance, the number of visible tabs of the battery cell 100A is four. The battery 100 includes a plurality of second pole pieces 20, and the second pole pieces 21 of some of the second pole pieces 20 can be arranged to be located on the right side of the central axis O1 (towards the positive direction of the X-axis), and the second pole pieces 21 of another part of the second pole pieces 20 are located on the left side of the central axis O1 (towards the negative direction of the X-axis). The plurality of second pole pieces 21 located on the right side of the central axis O1 (towards the positive direction of the X-axis) are welded into an integral structure, and the plurality of second pole pieces 21 located in the negative direction of the X-axis are welded into an integral structure. The four pole pieces are respectively a first pole piece 11, two second pole pieces 21, and a reference pole piece 31.

[0182] At this time, the battery 100 has three conductive circuits, which are the first conductive circuit, the second conductive circuit and the third conductive circuit. The second pole ear 21 located on the right side of the central axis O1 (towards the positive direction of the X-axis) can constitute the positive and negative poles of the first conductive circuit with the first pole ear 11, the second pole ear 21 located on the left side of the central axis O1 (towards the negative direction of the X-axis) can constitute the positive and negative poles of the second conductive circuit with the first pole ear 11, and the reference pole ear 31 and the first pole ear 11 constitute the positive and negative poles of the third conductive circuit. At this time, the three conductive circuits share the first pole ear 11 as the positive pole. The negative poles of the first conductive circuit and the second conductive circuit are two second pole ears 21 respectively, and the negative pole of the third conductive circuit is the reference pole ear. The three conductive circuits make the battery more efficient in charge and discharge. A specific embodiment of a bare cell having the above three conductive circuits is described in detail below.

[0183] See also Fig.21 and Fig. 22 , Fig.21 yes Figure 2 Schematic diagram of the structure of a ninth embodiment of a bare cell of a battery shown in FIG. Fig. 22 yes Fig.21 Schematic diagram of the split structure of the bare battery cell shown in.

[0184] In the ninth specific embodiment, the bare cell 110 has 13 layers in total, including the second pole piece 20, the isolation film 40, the first pole piece 10, the isolation film 40, the second pole piece 20, the isolation film 40, the first pole piece 10, the isolation film 40, the reference pole piece 30, the isolation film 40, the first pole piece 10, the isolation film 40, and the second pole piece 20 stacked in sequence along the Z-axis direction. The second pole ear 21 of the second pole piece 20 of the first layer is located on the right side of one side edge of the second pole piece 20 along the central axis O1 (towards the positive direction of the X-axis), and the second pole ear 21 of the second pole piece 20 of the fifth and thirteenth layers is located on the left side of one side edge of the second pole piece 20 along the central axis O1 (towards the negative direction of the X-axis). The first pole ear 11 of the first pole piece 10 is located on the left side of one side edge of the first pole piece 10 along the central axis O1, and the reference pole ear 31 of the reference pole piece 30 is located on the right side of one side edge of the reference pole piece 30 along the central axis O1. From the appearance, the battery cell 100A has four visible tabs, which are a first tab 11, two second tabs 21, and a reference tab 31. The first tab 11 and the reference tab 31 are located between the two second tabs 21. The four tabs are arranged from left to right in the following order: second tab 21, first tab 11, reference tab 31, and second tab 21.

[0185] The reference electrode 30 is located at the ninth layer of the bare cell 110, and the shape of the reference electrode 30 is the same as that of the second electrode 20. The reference electrode 30 includes a reference current collector layer and a reference active layer, and the material of the reference current collector layer is the same as that of the second current collector layer. The material of the reference active layer is the same as that of the second active layer.

[0186] The reference electrode sheet 30 can be used as a negative electrode sheet to participate in the charging and discharging process, so that the battery 100 has three conductive loops. The second pole tab 21 located on the right side of the central axis O1 can constitute the positive and negative poles of the first conductive loop with the first pole tab 11, the second pole tab 21 located on the left side of the central axis O1 can constitute the positive and negative poles of the second conductive loop with the first pole tab 11, and the reference pole tab 31 can constitute the positive and negative poles of the third conductive loop with the first pole tab 11. Specifically, the positive poles of the first conductive loop, the second conductive loop, and the third conductive loop are all the first pole tab 11, the negative poles of the first conductive loop and the second conductive loop are two second pole tabs 21 respectively, and the negative pole of the third conductive loop is the reference pole tab 31. That is, the three conductive loops share the first pole tab 11 as the positive pole. The three conductive loops make the battery charging efficiency higher and the heat generation lower. And increase the capacity of the battery 100, reduce the heat generation during the charging and discharging process, and improve the charging efficiency. The reference electrode 30 can also facilitate real-time monitoring of the real potential of the first electrode 11 and the second electrode 20, so as to monitor various parameters of the battery 100, reduce damage to the battery 100 during charging and discharging, delay the attenuation of the capacity of the battery 100, and increase the service life of the battery 100. In this embodiment, the method for calculating the real potential of the first electrode 10 and the second electrode 20 refers to the first embodiment, which will not be repeated here.

[0187] In the second to ninth embodiments, the reference electrode 30 may not participate in the charging and discharging process. At this time, the reference electrode 30 has a stable potential. The potential V01 of the reference electrode 30 is stored in the memory of the mobile phone. When the user uses the mobile phone normally later, the battery manager directly obtains the potential V01 of the reference electrode 30 in the memory. The first pole tab 11, the second pole tab 21 and the reference pole tab 31 are all connected to the battery management unit, so the battery manager can also obtain the voltage V1 between the reference pole tab 31 and the second pole tab 21, and obtain the voltage V2 between the first pole tab 11 and the second pole tab 21. The battery manager then uses the obtained potential V01 of the reference electrode 30, the detected voltage V1 between the first pole tab 11 and the second pole tab 21 in the first conductive loop, and the voltage V2 between the second pole tab 21 and the reference pole tab 31 in the second conductive loop to calculate the real potential of the first pole tab 10 and the real potential of the second pole tab 20.

[0188] In the second to ninth embodiments, the reference electrode 30 can be selected to participate in or not participate in the charging and discharging process. In other embodiments, the reference electrode 30 can only be selected not to participate in the charging and discharging process, and the reference electrode 30 is only used to monitor the real potential of the first pole tab 11 and the second pole piece 20 in real time. The following is a detailed description of three specific embodiments of bare cells in which the reference electrode 30 can only be selected not to participate in the charging and discharging process of the battery 100.

[0189] See also Fig.23 and Fig.24 , Fig.23 yes Figure 2 Schematic diagram of the structure of a tenth embodiment of a bare cell of a battery shown in FIG. Fig.24 yes Fig.23 Schematic diagram of the split structure of the bare battery cell shown in.

[0190] In the tenth specific embodiment, the bare cell 110 has a total of 13 layers, including a reference electrode 30, an isolation film 40, a second electrode 20, an isolation film 40, a first electrode 10, an isolation film 40, a second electrode 20, an isolation film 40, a first electrode 10, an isolation film 40, a second electrode 20, an isolation film 40, and a first electrode 10 stacked in sequence along the Z-axis direction. The first pole ear 11 of the first pole sheet 10 of the fifth and thirteenth layers is located on the left side of the central axis O1, and the first pole ear 11 of the first pole sheet 10 of the ninth layer is located on the right side of the central axis O1. The reference pole ear 31 is located on the right side of one side edge of the reference pole sheet 30 along the central axis O1. The second pole ear 21 is located on the left side of one side edge of the second pole sheet 20 along the central axis O1. The four pole ears are arranged from left to right in the following order: the first pole ear 11, the second pole ear 21, the reference pole ear 31, and the first pole ear 11.

[0191] The reference electrode 30 is located at the top layer of the bare cell 110, and the shape of the reference electrode 30 is the same as that of the first electrode 10. The reference electrode 30 includes a reference current collector layer, and the material of the reference current collector layer is the same as that of the first current collector layer. In other words, the shape and material of the reference electrode 30 are respectively the same as those of the first current collector layer.

[0192] In the tenth embodiment, the battery 100 has four tabs. However, the reference electrode 30 does not participate in charging and discharging, so the reference tab 31 does not constitute the positive or negative pole of the conductive loop. The battery 100 has two conductive loops. The first tab 11 and the second tab 21 located on the right side of the central axis O1 (towards the positive direction of the X-axis) constitute the positive and negative poles of one conductive loop, and the first tab 11 and the second tab 21 located on the left side of the central axis O1 (towards the negative direction of the X-axis) constitute the positive and negative poles of another conductive loop.

[0193] See also Fig.25 and Fig.26 , Fig.25 yes Figure 2 FIG. 1 is a schematic structural diagram of an eleventh embodiment of a bare cell of a battery shown in FIG. 1 . Fig.26 yes Fig.25 Schematic diagram of the split structure of the bare battery cell shown in.

[0194] In the eleventh specific embodiment, the bare cell 110 has a total of 13 layers, including a first pole piece 10, an isolation film 40, a reference pole piece 30, an isolation film 40, a first pole piece 10, an isolation film 40, a second pole piece 20, an isolation film 40, a first pole piece 10, an isolation film 40, a second pole piece 20, an isolation film 40, and a first pole piece 10 stacked in sequence along the Z-axis direction. The first pole ear 11 of the first pole piece 10 of the fifth and thirteenth layers is located on the left side of the central axis O1, and the first pole ear 11 of the first pole piece 10 of the first and ninth layers is located on the right side of the central axis O1. The reference pole ear 31 is located on the left side of one side edge of the reference pole piece 30 along the central axis O1. The second pole ear 21 is located on the right side of one side edge of the second pole piece 20 along the central axis O1. The four pole ears are arranged from left to right in the following order: the first pole ear 11, the reference pole ear 31, the second pole ear 21, and the first pole ear 11.

[0195] The difference from the tenth embodiment is that the reference electrode 30 is located in the third layer, and the reference electrode 30 includes a reference current collector layer, and the material of the reference current collector layer is the same as that of the second current collector layer.

[0196] In the eleventh embodiment, the battery 100 has four tabs. However, the reference electrode 30 does not participate in charging and discharging, so the reference tab 31 does not constitute the positive or negative pole of the conductive loop. The battery 100 has two conductive loops. The first tab 11 and the second tab 21 located on the right side of the central axis O1 constitute the positive and negative poles of one conductive loop, and the first tab 11 and the second tab 21 located on the left side of the central axis O1 constitute the positive and negative poles of another conductive loop.

[0197] See also Fig. 27 and Fig.28 , Fig. 27 yes Figure 2 Schematic diagram of the structure of a twelfth embodiment of a bare cell of a battery shown in FIG. Fig.28 yes Fig. 27 Schematic diagram of the split structure of the bare battery cell shown in.

[0198] In the twelfth specific embodiment, the bare cell 110 has a total of 13 layers, including a first pole piece 10, an isolation film 40, a second pole piece 20, an isolation film 40, a reference pole piece 30, an isolation film 40, a second pole piece 20, an isolation film 40, a first pole piece 10, an isolation film 40, a second pole piece 20, an isolation film 40, and a first pole piece 10 stacked in sequence along the Z-axis direction. The first pole ear 11 of the first pole piece 10 of the thirteenth layer is located on the left side of the central axis O1, and the first pole ear 11 of the first pole piece 10 of the first layer and the ninth layer is located on the right side of the central axis O1. The reference pole ear 31 is located on the left side of one side edge of the reference pole piece 30 along the central axis O1. The second pole ear 21 is located on the right side of one side edge of the second pole piece 20 along the central axis O1. The four pole ears are arranged from left to right in the following order: reference pole ear 31, first pole ear 11, second pole ear 21, first pole ear 11.

[0199] The reference electrode 30 is located at the fifth layer of the bare battery cell 110. The reference electrode 30 includes a reference current collector layer, and the material of the reference current collector layer is the same as that of the first current collector layer.

[0200] In the twelfth embodiment, the battery 100 has four tabs. However, the reference electrode 30 does not participate in charging and discharging, so the reference tab 31 does not constitute the positive or negative pole of the conductive loop. The battery 100 has two conductive loops. The first tab 11 and the second tab 21 located on the right side of the central axis O1 constitute the positive and negative poles of one conductive loop, and the first tab 11 and the second tab 21 located on the left side of the central axis O1 constitute the positive and negative poles of another conductive loop.

[0201] In the tenth, eleventh and twelfth modes, the reference electrode 30 does not participate in the charging and discharging process of the battery. At this time, the potential V01 of the reference electrode 30 is in a stable state, and the potential V01 of the reference electrode 30 is stored in the memory of the mobile phone. When the user uses the mobile phone normally later, the battery manager directly obtains the potential V01 of the reference electrode 30 in the memory. The first pole tab 11, the second pole tab 21 and the reference pole tab 31 are all connected to the battery management unit, so the battery manager can also obtain the voltage V1 between the reference pole tab 31 and the second pole tab 21, and obtain the voltage V2 between the first pole tab 11 and the second pole tab 21. The battery manager then uses the obtained potential V01 of the reference electrode 30, the detected voltage V1 between the first pole tab 11 and the second pole tab 21 in the first conductive loop, and the voltage V2 between the second pole tab 21 and the reference pole tab 31 in the second conductive loop to calculate the real potential of the first pole tab 10 and the real potential of the second pole tab 20.

[0202] As can be seen from the above, in this embodiment, the reference electrode 30 is provided with a reference electrode tab 31, so that the battery has a reference electrode tab 31 in addition to the first electrode tab 11 and the second electrode tab 21. The first electrode tab 11, the second electrode tab 21 and the reference electrode tab 31 can all be connected to the battery manager to achieve a solution in which the battery has at least three electrode tabs in appearance. During the use of the mobile phone, the battery manager can obtain the real potential of the first electrode 10 and the second electrode 20 in real time, which is convenient for evaluating various performances of the battery and monitoring various parameters of the battery 100, so as to reduce the damage to the battery 100 during the charging and discharging process, delay the attenuation of the capacity of the battery 100, and increase the service life of the battery 100.

[0203] In addition, the reference electrode 30 is made of the positive electrode material of the battery or the negative electrode material of the battery. The reference electrode 30 can participate in the charging and discharging of the battery 100, thereby increasing the capacity of the battery 100. The battery can be charged and discharged in multiple ways, thereby increasing the charging efficiency and reducing the heating of the battery 100. In addition, the reference electrode 30 is part of the structure of the battery 100 itself. Compared with the reference electrode in the prior art that takes up additional space and is connected from the outside, the risk of the battery 100 itself is reduced, which is beneficial to the stability of the structure of the battery 100 and can increase the safety factor of the battery 100.

[0204] The above are only some embodiments and implementation methods of the present application, and the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by any person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A battery, characterized in that: include: A battery cell, the battery cell comprising a housing and a bare battery cell, the bare battery cell comprising a first pole piece, a second pole piece and a reference pole piece; The first pole piece is provided with a first pole lug, the second pole piece is provided with a second pole lug, and the reference pole piece is provided with a reference pole lug; the first pole piece has a first polarity, and the second pole piece has a second polarity; the first pole piece, the second pole piece, and the reference pole piece are located inside the shell, and the first pole lug, the second pole lug, and the reference pole lug are located inside the shell or partially extend outside the shell; The first pole piece and the second pole piece cooperate to input current into the battery cell, or enable the battery cell to output current; the reference pole piece is used to obtain the real potential of the first pole piece during the process of inputting current or outputting current to the battery cell, and is used to obtain the real potential of the second pole piece during the process of inputting current or outputting current to the battery cell; The reference electrode has a first polarity or a second polarity, and the reference electrode cooperates with the second electrode to input current into the battery cell, or enables the battery cell to output current; The first pole piece, the second pole piece and the reference pole piece are stacked or wound; when the reference pole piece has a first polarity, the reference pole piece is adjacent to the second pole piece; When the reference electrode has the second polarity, the reference electrode is adjacent to the first electrode; The first pole piece, the second pole piece and the reference pole piece have the same size, and the first pole piece, the second pole piece and the reference pole piece have the same shape; In the thickness direction of the battery, the outer periphery of the first pole piece, the outer periphery of the second pole piece and the outer periphery of the reference pole piece are aligned; The battery comprises a first conductive loop and a second conductive loop; the first conductive loop and the second conductive loop share the second electrode tab; The first pole lug and the reference pole lug are respectively the positive pole of the first conductive loop and the positive pole of the second conductive loop, and the second pole lug is the negative pole of the first conductive loop and the second conductive loop; or, the first pole lug and the reference pole lug are respectively the negative pole of the first conductive loop and the negative pole of the second conductive loop, and the second pole lug is the positive pole of the first conductive loop and the second conductive loop.

2. The battery according to claim 1, characterized in that The material of the reference pole piece is the same as that of the first pole piece.

3. The battery according to claim 1, characterized in that There are a plurality of first pole pieces, each of which is provided with the first pole ear; the plurality of first pole pieces are divided into a first part and a second part, and the first pole ears of the first pole pieces of the first part and the first pole ears of the first pole pieces of the second part are staggered; The first pole ear of the first pole sheet of the first part cooperates with the second pole ear to input current into the battery cell, or to output current from the battery cell; the first pole ear of the first pole sheet of the second part cooperates with the second pole ear to input current into the battery cell, or to output current from the battery cell.

4. The battery according to claim 3, characterized in that The battery further comprises a third conductive loop; the first conductive loop, the second conductive loop and the third conductive loop share the second electrode tab; The first pole lugs of the two first pole pieces and the reference pole lug are respectively the positive pole of the first conductive circuit, the positive pole of the second conductive circuit and the positive pole of the third conductive circuit, and the second pole lug is the negative pole of the first conductive circuit, the second conductive circuit and the third conductive circuit; or, the first pole lugs of the two first pole pieces and the reference pole lug are respectively the negative pole of the first conductive circuit, the negative pole of the second conductive circuit and the negative pole of the third conductive circuit, and the second pole lug is the positive pole of the first conductive circuit, the second conductive circuit and the third conductive circuit.

5. The battery according to claim 1, characterized in that There are multiple second pole pieces, each of which is provided with a second pole ear; the multiple second pole pieces are divided into a first part and a second part, and the second pole ears of the second pole pieces in the first part and the second pole ears of the second pole pieces in the second part are staggered; The first pole ear cooperates with the second pole ear of the second pole piece of the first part to input current into the battery cell, or to output current from the battery cell; the reference pole ear cooperates with the second pole ear of the second pole piece of the second part to input current into the battery cell, or to output current from the battery cell.

6. The battery according to claim 1, characterized in that The battery further includes a separator; the first pole piece and the second pole piece are both in plurality, and the first pole piece, the second pole piece, the reference pole piece and the separator are stacked or wound to form the bare cell; The reference electrode is located at any layer of the bare battery cell, part of the second electrode is alternately distributed with multiple first electrode sheets, and another part of the second electrode is alternately distributed with the reference electrode; the isolation membrane is provided between adjacent first electrode sheets and second electrode sheets, and the isolation membrane is provided between adjacent second electrode sheets and the reference electrode sheet.

7. The battery according to any one of claims 1 to 6, characterized in that The first pole tab, the second pole tab and the reference pole tab are all arranged on the same side of the bare battery cell; the first pole tab and the reference pole tab are located on both sides of the second pole tab.

8. The battery according to any one of claims 1 to 6, characterized in that The battery further includes a protection circuit board, which is fixed to one side of the housing and connected to the first pole tab, the second pole tab and the reference pole tab.

9. A battery management method, characterized in that: Applied to the battery as claimed in claim 1, the method comprises: When the battery is charged or discharged, obtaining a voltage between a reference electrode and a second electrode, and obtaining a voltage between the first electrode and the second electrode; The real potential of the second electrode piece is obtained according to the voltage between the reference electrode piece and the second electrode piece and the stored potential of the reference electrode piece; the real potential of the first electrode piece is obtained according to the voltage between the first electrode piece and the second electrode piece and the real potential of the second electrode piece.

10. A battery management method, characterized in that: Applied to the battery according to any one of claims 1 to 8, the method comprises: When the battery is charged or discharged, characteristic parameters of the battery are obtained, and the obtained characteristic parameters are compared with stored characteristic parameters; the stored characteristic parameters are located in a corresponding relationship table or corresponding relationship curve between the characteristic parameters and the potential of the reference electrode; the characteristic parameters include charge and discharge times, current, voltage, charge and discharge time and battery temperature; When the acquired characteristic parameter corresponds to the stored characteristic parameter, the potential of the reference electrode corresponding to the stored characteristic parameter is acquired; Acquiring a voltage between a reference electrode and a second electrode, and acquiring a voltage between the first electrode and the second electrode; The real potential of the second pole piece is obtained according to the voltage between the reference pole ear and the second pole ear and the obtained potential of the reference pole ear; the real potential of the first pole piece is obtained according to the voltage between the first pole ear and the second pole ear and the real potential of the second pole piece.

11. The battery management method according to claim 10, characterized in that: Before obtaining the characteristic parameters of the battery, the method further includes: obtaining a table or curve of corresponding relationships between the characteristic parameters and the potential of a reference electrode; Specifically include: Charge or discharge the battery; Acquiring characteristic parameters of the battery during charging or discharging; Obtain the potential of the reference electrode corresponding to different characteristic parameters; The characteristic parameters and the corresponding potential of the reference electrode are stored in a table or curve form.

12. An electronic device, characterized in that: The invention comprises a battery manager and a memory, wherein the memory is used to store instructions, and the battery manager is used to execute the instructions so that the method described in claim 10 or 11 is performed.

13. An electronic device, characterized in that: It comprises a shell, a battery manager and the battery according to any one of claims 1 to 8, the shell is provided with an installation compartment, the battery and the battery manager are installed in the installation compartment, and the battery manager is electrically connected to the first pole lug, the second pole lug and the reference pole lug.

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