Battery, circuit, device, charging method and discharging method

Abstract

The invention discloses a battery, a circuit, equipment, a charging method and a discharging method, and relates to the technical field of electronic equipment.The battery comprises a positive pole piece, a diaphragm, a first negative pole piece and a second negative pole piece which are stacked and wound; the first negative pole piece, the positive pole piece and the diaphragm form a first battery cell, and the second negative pole piece, the positive pole piece and the diaphragm form a second battery cell; wherein the impedance of the first negative pole piece and the impedance of the second negative pole piece are different under the same parameters, and the parameters comprise at least one of temperature and voltage. According to the invention, the requirements of short charging time and long endurance of the electronic equipment can be met at the same time.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic equipment, and specifically relates to a battery, a circuit, a device, a charging method, and a discharging method. Background Art

[0002] With the rapid development of intelligent electronic devices, electronic devices have higher and higher requirements for battery life. In order to meet the battery life requirements, improving the energy density of current batteries is an important research direction. At present, the purpose of increasing battery energy density can be achieved by changing the material of the negative electrode plate inside the battery, such as replacing the traditional graphene negative electrode plate with a silicon negative electrode plate. However, with the replacement of the negative electrode material, due to the characteristics of the material, other challenges may arise. For example, under the influence of different parameters such as temperature and voltage, the chemical impedance of the negative electrode plate increases, resulting in a longer charging time for the battery.

[0003] It can be seen that how to simultaneously meet the needs of electronic devices for short charging time and long battery life is an urgent problem to be solved. Summary of the invention

[0004] The present application aims to provide a battery, a circuit, a device, a charging method and a discharging method, which can simultaneously meet the requirements of electronic devices for shorter charging time and longer battery life.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a battery, comprising:

[0007] A stacked and wound positive electrode sheet, a separator, a first negative electrode sheet and a second negative electrode sheet;

[0008] The first negative electrode sheet, the positive electrode sheet and the separator form a first battery cell, and the second negative electrode sheet, the positive electrode sheet and the separator form a second battery cell;

[0009] There is a difference in impedance between the first negative electrode plate and the second negative electrode plate under the same parameters, and the parameters include at least one of temperature and voltage.

[0010] In a second aspect, an embodiment of the present application provides a charging and discharging circuit, comprising:

[0011] A first battery cell module and a second battery cell module;

[0012] A parameter acquisition module is connected to the first battery cell module and the second battery cell module, the parameter acquisition module includes at least one of an electric meter module and a temperature sensing module, the electric meter module is used to collect the voltage of the first battery cell module and the second battery cell module, and the temperature sensing module is used to collect the temperature of the first battery cell module and the second battery cell module;

[0013] A switch control module, connected to the first battery cell module and the second battery cell module, and used to control the connection state between the first battery cell module and the second battery cell module;

[0014] The charging and discharging module is connected to the parameter acquisition module and the switch control module, and is used to generate a control signal according to the parameters collected by the parameter acquisition module, and send the control signal to the switch control module so that the switch control module controls one of the first battery cell module and the second battery cell module to be connected and the other to be disconnected.

[0015] In a third aspect, an embodiment of the present application provides an electronic device, comprising a battery as in the first aspect, or a charging and discharging circuit as in the second aspect.

[0016] In a fourth aspect, an embodiment of the present application provides a charging method, comprising:

[0017] Obtain parameters corresponding to the first battery cell and the second battery cell;

[0018] According to the parameters, a target cell among the first cell and the second cell is charged, wherein when the first impedance is less than the second impedance, the target cell is the first cell, and when the first impedance is greater than the second impedance, the target cell is the second cell, the first impedance is the impedance corresponding to the first cell under the parameters, and the second impedance is the impedance corresponding to the second cell under the parameters.

[0019] In a fifth aspect, an embodiment of the present application provides a discharge method, comprising:

[0020] Obtain parameters corresponding to the first battery cell and the second battery cell;

[0021] According to the parameters, a target cell among the first cell and the second cell is discharged, wherein when the first impedance is less than the second impedance, the target cell is the first cell, and when the first impedance is greater than the second impedance, the target cell is the second cell, the first impedance is the impedance corresponding to the first cell under the parameters, and the second impedance is the impedance corresponding to the second cell under the parameters.

[0022] In a sixth aspect, an embodiment of the present application provides a charging device, including:

[0023] A first acquisition module, used to acquire parameters corresponding to the first battery cell and the second battery cell;

[0024] A charging module is used to charge a target battery cell among a first battery cell and a second battery cell according to parameters, wherein when the first impedance is less than the second impedance, the target battery cell is the first battery cell, and when the first impedance is greater than the second impedance, the target battery cell is the second battery cell, the first impedance is the impedance corresponding to the first battery cell under the parameters, and the second impedance is the impedance corresponding to the second battery cell under the parameters.

[0025] In a seventh aspect, an embodiment of the present application provides a discharge device, comprising:

[0026] A second acquisition module, used to acquire parameters corresponding to the first battery cell and the second battery cell;

[0027] A discharge module is used to discharge a target cell among the first cell and the second cell according to parameters, wherein when the first impedance is less than the second impedance, the target cell is the first cell, and when the first impedance is greater than the second impedance, the target cell is the second cell, the first impedance is the impedance corresponding to the first cell under the parameters, and the second impedance is the impedance corresponding to the second cell under the parameters.

[0028] In an eighth aspect, an embodiment of the present application proposes an electronic device, comprising a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the steps of the method in the fourth aspect or the fifth aspect are implemented.

[0029] In the ninth aspect, an embodiment of the present application proposes a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method in the fourth aspect or the fifth aspect are implemented.

[0030] In the tenth aspect, an embodiment of the present application proposes a computer program product, which is stored in a storage medium and is executed by at least one processor to implement the steps of the method of the fourth aspect or the fifth aspect.

[0031] In an embodiment of the present application, the battery may include a first battery cell and a second battery cell having a common positive electrode plate and a separator, and having different negative electrode plates: the first battery cell includes a first negative electrode plate; the second battery cell includes a second negative electrode plate; wherein the impedance of the first negative electrode plate and the second negative electrode plate under the same parameters is different, and the parameters include at least one of temperature and voltage. In this way, during the charging or discharging process of the battery, the battery cell with lower impedance can be determined according to the real-time parameters to perform the charging or discharging operation until it is fully charged or discharged. In this way, it can be ensured that during the charging process, the charging impedance is always low, shortening the charging time, and during the discharging process, the discharge impedance is also always low, improving the battery life, so as to simultaneously meet the requirements of the electronic device installed with the battery for shorter charging time and longer battery life.

[0032] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0034] Figure 1 is a structural schematic diagram of a battery provided in an embodiment of the present application;

[0035] Figure 2 is another structural schematic diagram of a battery provided in an embodiment of the present application;

[0036] Figure 3 is a relationship diagram between the voltage, temperature and first impedance of the first battery cell provided in an embodiment of the present application;

[0037] Figure 4 is a relationship diagram between the voltage, temperature and second impedance of the second battery cell provided in an embodiment of the present application;

[0038] Figure 5 is a schematic diagram of a charging and discharging circuit provided in an embodiment of the present application;

[0039] Figure 6 It is a schematic diagram of the flow of the charging method provided in the embodiment of the present application;

[0040] Figure 7 It is a flowchart of a specific scenario embodiment of the charging method provided in the embodiment of the present application;

[0041] Figure 8 is a schematic flow chart of a discharge method provided in an embodiment of the present application;

[0042] Fig. 9 It is a flowchart of a specific scenario embodiment of the discharge method provided in the embodiment of the present application;

[0043] Fig.10 is a schematic diagram of the structure of a charging device provided in an embodiment of the present application;

[0044] Fig.11 is a schematic diagram of the structure of a discharge device provided in an embodiment of the present application;

[0045] Fig.12 is a schematic diagram of the structure of an electronic device according to an embodiment of the present application;

[0046] Fig.13 It is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present application.

[0047] Reference numerals:

[0048] 100, battery; 110, first battery cell; 120, second battery cell;

[0049] 101, first negative electrode sheet; 102, second negative electrode sheet; 103, positive electrode sheet; 104, separator;

[0050] 1031, a first positive electrode plate; 1032, a second positive electrode plate; 1041, a first separator; 1042, a second separator;

[0051] 501, first battery cell module; 502, second battery cell module; 503, parameter acquisition module; 5031, power meter module; 5032, temperature sensing module; 504, switch control module; 505, charge and discharge module. DETAILED DESCRIPTION

[0052] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0053] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0054] In the description of the present application, it should be understood that the terms "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0055] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] In related technologies, with the rapid development of intelligent electronic devices, electronic devices have higher and higher requirements for battery life. In order to meet the battery life requirements, improving the energy density of the battery is an important research direction. At present, the purpose of improving the energy density of the battery can be achieved by changing the material of the negative electrode inside the battery, such as replacing the graphene negative electrode of the traditional lithium battery with a silicon negative electrode.

[0057] The theoretical specific capacity of silicon is several times that of graphite, so it can store more lithium ions, making the battery's energy density higher and achieving a longer driving range. However, the applicant found that the energy density advantage of silicon negative electrode batteries over graphene batteries is mainly reflected when the voltage is low. When the voltage is high, the amount of electricity released by silicon negative electrode batteries is not much different from that of graphene batteries at the same voltage. And because silicon negative electrode batteries have added silicon materials to the negative electrode materials compared to graphene batteries, lithium ions need to move more in silicon particles and pass through the silicon interface and the porous carbon interface more than graphene batteries, and the chemical impedance is greater, resulting in lower charging efficiency of silicon negative electrode batteries than graphene batteries. Based on this, the embodiments of the present application provide a battery, circuit, device, charging method and discharge method that can simultaneously meet the needs of electronic devices for shorter charging time and longer battery life.

[0058] Combine the following Figure 1 A battery provided according to an embodiment of the present application is described.

[0059] like Figure 1 As shown, a battery 100 is provided in an embodiment of the present application, comprising:

[0060] A stacked and wound positive electrode sheet 103, a separator 104, a first negative electrode sheet 101 and a second negative electrode sheet 102;

[0061] The first negative electrode sheet 101, the positive electrode sheet 103 and the separator 104 form a first battery cell 110, and the second negative electrode sheet 102, the positive electrode sheet 103 and the separator 104 form a second battery cell 120;

[0062] The impedances of the first negative electrode plate 101 and the second negative electrode plate 102 are different under the same parameters, and the parameters include at least one of temperature and voltage.

[0063] In this embodiment, if Figure 1 As shown, the battery 100 may include a stacked and wound positive electrode sheet 103, a separator 104, and a negative electrode sheet, wherein the negative electrode sheet may be wound with a first negative electrode sheet 101 and a second negative electrode sheet 102 made of two different materials at the same time. The first negative electrode sheet 101 and the second negative electrode sheet 102 share the positive electrode sheet 103 and the separator 104 to form a first battery cell 110 and a second battery cell 120, respectively.

[0064] It can be understood that the first negative electrode plate 101 and the second negative electrode plate 102 are made of different materials, and at the same temperature and / or voltage, the impedances of the first negative electrode plate 101 and the second negative electrode plate 102 are different.

[0065] In some embodiments, the first negative electrode plate 101 may be a graphene negative electrode plate, and the corresponding first battery cell 110 may be a graphene battery cell. The second negative electrode plate 102 may be a silicon negative electrode plate, and the corresponding second battery cell 120 may be a silicon negative electrode battery cell. That is, the material of the first negative electrode plate 101 may be a graphene material, and the material of the second negative electrode plate 102 may be a silicon material. Figure 3 and Figure 4 As shown, the impedance of graphene cells and silicon negative electrode cells changes with temperature and voltage. During the charging and discharging process, the impedance of graphene cells and silicon negative electrode cells corresponding to the current temperature and voltage can be compared, and cells with lower impedance can be preferentially selected for charging and discharging.

[0066] For the battery 100 , matching can be performed based on the parameters collected during the charging and discharging process, so that charging and discharging can be switched to a battery cell with lower impedance at any time.

[0067] In an embodiment of the present application, the battery 100 may include a common positive electrode plate 103 and a separator 104, and a first battery cell 110 and a second battery cell 120 with different negative electrode plates: the first battery cell 110 includes a first negative electrode plate 101; the second battery cell 120 includes a second negative electrode plate 102; wherein the impedance of the first negative electrode plate 101 and the second negative electrode plate 102 under the same parameters is different, and the parameters include at least one of temperature and voltage. In this way, during the charging or discharging process of the battery 100, the battery cell with lower impedance can be determined according to the real-time parameters to perform the charging or discharging operation until it is fully charged or discharged. In this way, it can be ensured that during the charging process, the charging impedance is always low, shortening the charging time, and during the discharging process, the discharge impedance is also always low, improving the battery life of the battery 100, so as to simultaneously meet the requirements of the electronic device installed with the battery 100 for shorter charging time and longer battery life.

[0068] In addition, the two battery cells share the positive electrode sheet 103 , and the two negative electrode sheets are wound together, which can greatly reduce the space required for the two battery cells and facilitate the miniaturization of the battery 100 .

[0069] In some examples, such as Figure 2As shown, the first battery cell 110 and the second battery cell 120 may also be two independent battery cells. The first battery cell 110 may include a first negative electrode sheet 101, a first positive electrode sheet 1031, and a first separator 1041 that are stacked and wound. The second battery cell 120 may include a second negative electrode sheet 102, a second positive electrode sheet 1032, and a second separator 1042 that are stacked and wound. The first battery cell 110 and the second battery cell 120 are connected in parallel to obtain the battery 100.

[0070] In this way, there is no need to change the winding structure of the battery cell, and the battery 100 can be assembled using two battery cells with different negative electrode materials, thereby reducing the complexity of the production process of the battery 100.

[0071] Based on the above battery 100, please refer to Figure 5 , the embodiment of the present application further provides a charging and discharging circuit, comprising:

[0072] A first battery cell module 501 and a second battery cell module 502;

[0073] The parameter acquisition module 503 is connected to the first battery cell module 501 and the second battery cell module 502. The parameter acquisition module 503 includes at least one of an electric meter module 5031 and a temperature sensing module 5032. The electric meter module 5031 is used to collect the voltage of the first battery cell module 501 and the second battery cell module 502. The temperature sensing module 5032 is used to collect the temperature of the first battery cell module 501 and the second battery cell module 502.

[0074] The switch control module 504 is connected to the first battery cell module 501 and the second battery cell module 502 and is used to control the connection state between the first battery cell module 501 and the second battery cell module 502;

[0075] The charging and discharging module 505 is connected to the parameter acquisition module 503 and the switch control module 504, and is used to generate a control signal according to the parameters collected by the parameter acquisition module 503, and send the control signal to the switch control module 504, so that the switch control module 504 controls one of the first battery cell module 501 and the second battery cell module 502 to be connected and the other to be disconnected.

[0076] In this embodiment, if Figure 5 As shown, the charge and discharge circuit may include a first battery cell module 501 , a second battery cell module 502 , a parameter acquisition module 503 , a switch control module 504 and a charge and discharge module 505 .

[0077] The parameter acquisition module 503 may be connected to the first battery cell module 501 and the second battery cell module 502, and the parameter acquisition module 503 may include a power meter module 5031 for real-time acquisition of the voltage of the first battery cell module 501 and the second battery cell module 502, and may also include a temperature sensing module 5032 for real-time acquisition of the temperature of the first battery cell module 501 and the second battery cell module 502, and may also include both the power meter module 5031 and the temperature sensing module 5032. In some examples, the power meter module 5031 may also be used to collect the current of the first battery cell module 501 and the second battery cell module 502.

[0078] The switch control module 504 can be connected to the first battery cell module 501 and the second battery cell module 502. For example, when charging and discharging are not required, the switch control module 504 can be disconnected from both the first battery cell module 501 and the second battery cell module 502. When the switch control module 504 is connected to the first battery cell module 501, it can be considered that the first battery cell 110 is charged and discharged at this time. When the switch control module 504 is connected to the second battery cell module 502, it can be considered that the second battery cell 120 is charged and discharged at this time.

[0079] The charge and discharge module 505 can be connected to the parameter acquisition module 503 and the switch control module 504, and is used to generate a control signal according to the parameters collected by the parameter acquisition module 503. For example, the charge and discharge module 505 can determine the target battery cell with lower impedance among the first battery cell 110 and the second battery cell 120 based on the parameters collected by the parameter acquisition module 503, and generate a control signal connected to the target battery cell. The control signal can be sent to the switch control module 504, and after receiving the control signal, the switch control module 504 can control the battery cell module corresponding to the target battery cell to be connected, and the other battery cell module to be disconnected.

[0080] It is understandable that the charge and discharge module 505 may include a charging system for charge control and a discharge system for discharge control. In other words, the charging system determines which battery cell to charge through the switch control module 504, and the discharge system determines which battery cell to use for discharge through the switch control module 504.

[0081] In this way, during the charging or discharging process of the battery 100, the battery cell with lower impedance can be determined according to the real-time parameters to perform the charging or discharging operation until it is fully charged or discharged. In this way, it can be ensured that during the charging process, the charging impedance is always low, shortening the charging time, and during the discharging process, the discharge impedance is also always low, improving the battery life of the battery 100, so as to simultaneously meet the requirements of the electronic device equipped with the battery 100 for shorter charging time and longer battery life.

[0082] An embodiment of the present application may also provide an electronic device, comprising the above-mentioned battery, or the above-mentioned charging and discharging circuit.

[0083] In this embodiment, the electronic device may include the above-mentioned battery or charging and discharging circuit. The electronic device may be a mobile phone, a laptop computer, a PDA, a tablet computer, a learning machine, an electronic photo album, a smart watch, etc. The electronic device can simultaneously meet the requirements of short charging time and long battery life.

[0084] The embodiment of the present application can also provide a charging method applied to the above-mentioned battery. The charging method provided by the embodiment of the present application is described in detail below through specific embodiments and application scenarios in combination with the accompanying drawings.

[0085] Figure 6 : is a flow chart of a charging method provided in an embodiment of the present application. The charging method may include the following steps:

[0086] Step 601, obtaining parameters corresponding to the first battery cell and the second battery cell.

[0087] In step 601, before starting charging, the parameters corresponding to the first battery cell and the second battery cell at the current moment can be obtained, and the parameters corresponding to the first battery cell and the second battery cell can be polled during the charging process. The parameters may include the voltage of the first battery cell, the voltage of the second battery cell, and the temperature of the battery. It can be understood that since the first battery cell and the second battery cell are integrated together, the temperature of the battery can be considered to be the temperature of the first battery cell and the temperature of the second battery cell.

[0088] Step 602, charging a target battery cell among the first battery cell and the second battery cell according to the parameters;

[0089] Among them, when the first impedance is less than the second impedance, the target battery cell is the first battery cell, and when the first impedance is greater than the second impedance, the target battery cell is the second battery cell. The first impedance is the impedance corresponding to the first battery cell under the parameters, and the second impedance is the impedance corresponding to the second battery cell under the parameters.

[0090] In step 602, the target cell of the first cell and the second cell can be determined according to the parameters. The target cell can be the cell with lower impedance of the first cell and the second cell. For example, the first impedance of the first cell under the parameters related to the current first cell can be matched according to the parameters related to the first cell in the parameters and the corresponding relationship table between the preset parameters and the impedance of the first cell. Similarly, the second impedance of the second cell under the parameters related to the current second cell can be matched according to the parameters related to the second cell in the parameters and the corresponding relationship table between the preset parameters and the impedance of the second cell.

[0091] The first impedance is compared with the second impedance. When the first impedance is smaller than the second impedance, the target battery cell is the first battery cell. When the first impedance is larger than the second impedance, the target battery cell is the second battery cell.

[0092] The target battery cell is charged, and the parameters corresponding to the first battery cell and the second battery cell are polled. When the magnitude relationship between the first impedance and the second impedance changes, the battery cell can be switched for charging.

[0093] In this way, during the battery charging process, the battery cell with lower impedance can be determined according to the real-time parameters to perform the charging operation until it is fully charged. In this way, it can be ensured that the charging impedance is always low during the charging process, shortening the charging time.

[0094] In some embodiments, the parameter includes temperature, a voltage of the first battery cell, and a voltage of the second battery cell;

[0095] Charging a target battery cell in the first battery cell and the second battery cell according to the parameter may include:

[0096] When the temperature is greater than or equal to a first temperature threshold, determining the first battery cell as a target battery cell and charging the first battery cell;

[0097] When the voltage of the first battery cell is charged to the first voltage threshold, the target battery cell is switched from the first battery cell to the second battery cell and charged until the voltage of the second battery cell is charged to the second voltage threshold;

[0098] Among them, the first temperature threshold is the temperature critical value corresponding to the first impedance being continuously less than the second impedance, the first voltage threshold is the voltage corresponding to the first battery cell being in a fully charged state, and the second voltage threshold is the voltage corresponding to the second voltage being in a fully charged state.

[0099] In this embodiment, the parameters may include temperature, the voltage of the first battery cell, and the voltage of the second battery cell. A first temperature threshold, a first voltage threshold, and a second voltage threshold may also be obtained. Among them, the first voltage threshold is the voltage corresponding to the first battery cell being in a fully charged state, and the second voltage threshold is the voltage corresponding to the second voltage being in a fully charged state. The first voltage threshold and the second voltage threshold may be pre-set, may be the same value, or may be different values, and may be set specifically according to actual conditions.

[0100] For the first temperature threshold, the first temperature threshold can be determined according to the correspondence table between the preset parameters and the impedance of the first battery cell, and the correspondence table between the parameters and the impedance of the second battery cell. The first temperature threshold is the temperature critical value corresponding to the first impedance being continuously less than the second impedance. That is, if the temperature exceeds the first temperature threshold, the first impedance is always less than the second impedance.

[0101] In order to facilitate the description of the technical solution of this embodiment, the following description will be made by taking the first negative electrode plate as a graphene negative electrode plate and the second negative electrode plate as a silicon negative electrode plate as an example. In other words, the first battery cell is a graphene battery cell and the second battery cell is a silicon negative electrode battery cell, wherein the first voltage threshold and the second voltage threshold can be 4.5V. Figure 3 and Figure 4 The relationship diagram between impedance and parameters shown in FIG. 1 determines that the first temperature threshold is 25° C.

[0102] When the temperature is greater than or equal to the first temperature threshold, the first battery cell can be determined as the target battery cell and charged until the voltage of the first battery cell is charged to the first voltage threshold. The target battery cell can be switched from the first battery cell to the second battery cell and charged until the voltage of the second battery cell is charged to the second voltage, and then the charging is terminated.

[0103] For example, Figure 7 As shown, the charging method may include:

[0104] Step 701, obtaining the current temperature of the battery, if the temperature is greater than or equal to 25°C, then step 702 may be executed;

[0105] Step 702, charging the graphene battery cell to 4.5V;

[0106] Step 703, switch the silicon negative electrode cell to charge to 4.5V.

[0107] In this way, based on the first temperature threshold that characterizes that the first impedance is continuously less than the temperature critical value corresponding to the second impedance, it can be determined that when the temperature is above the first temperature threshold, the first battery cell can be determined as the target battery cell, and the second battery cell can be switched to charge after being fully charged. There is no need to compare the first impedance and the second impedance in real time. During the charging process, it can be ensured that the charging impedance is always low, shortening the charging time while saving computing power.

[0108] In some embodiments, charging a target battery cell in the first battery cell and the second battery cell according to the parameter may further include:

[0109] When the temperature is less than the first temperature threshold, determining the second battery cell as the target battery cell and charging it;

[0110] When the temperature is greater than or equal to the first temperature threshold, or the voltage of the second battery cell is charged to the second voltage threshold, the target battery cell is switched from the second battery cell to the first battery cell and charged until the voltage of the first battery cell is charged to the first voltage threshold.

[0111] In this embodiment, when the temperature is lower than the first temperature threshold, the second battery cell can be determined as the target battery cell and charged until the temperature is greater than or equal to the first temperature threshold; or, when the voltage of the second battery cell is charged to the second voltage threshold, the target battery cell can be switched from the second battery cell to the first battery cell and charged until the voltage of the first battery cell is charged to the first voltage threshold.

[0112] For example, Figure 7 As shown, the charging method may include:

[0113] Step 701, obtaining the current temperature of the battery, if the temperature is less than 25°C, then step 704 may be executed;

[0114] Step 704, charging the silicon negative electrode cell and detecting the temperature of the battery in real time. If the temperature is greater than or equal to 25°C, step 707 may be executed; if the temperature is less than 25°C, step 705 may be executed;

[0115] Step 705, charging the silicon negative electrode cell to 4.5V;

[0116] Step 706, switching the graphene battery cell to charge to 4.5V;

[0117] Step 707, switch the graphene battery cell to charge to 4.5V;

[0118] Step 708, switch the silicon negative electrode cell to charge to 4.5V.

[0119] In this way, the first temperature threshold, the first voltage threshold and the second voltage threshold can be used as reference values ​​of the parameters to directly determine the target battery cell with lower impedance. There is no need to compare the first impedance and the second impedance in real time. This can ensure that the charging impedance is always low during the charging process, shorten the charging time and save computing power.

[0120] The embodiment of the present application may also provide a discharge method applied to the above-mentioned battery. The discharge method provided by the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0121] Figure 8 : is a flow chart of a discharge method provided in an embodiment of the present application. The discharge method may include the following steps:

[0122] Step 801, obtaining parameters corresponding to the first battery cell and the second battery cell.

[0123] In step 801, before starting to discharge, the parameters corresponding to the first battery cell and the second battery cell at the current moment can be obtained, and the parameters corresponding to the first battery cell and the second battery cell can be polled during the discharge process. The parameters may include the voltage of the first battery cell, the voltage of the second battery cell, and the temperature of the battery. It can be understood that since the first battery cell and the second battery cell are integrated together, the temperature of the battery can be considered to be the temperature of the first battery cell and the temperature of the second battery cell.

[0124] Step 802, discharging a target battery cell in the first battery cell and the second battery cell according to the parameters;

[0125] Among them, when the first impedance is less than the second impedance, the target battery cell is the first battery cell, and when the first impedance is greater than the second impedance, the target battery cell is the second battery cell. The first impedance is the impedance corresponding to the first battery cell under the parameters, and the second impedance is the impedance corresponding to the second battery cell under the parameters.

[0126] In step 802, a target cell among the first cell and the second cell can be determined according to the parameters. The target cell can be the cell with lower impedance among the first cell and the second cell. For example, the first impedance of the first cell under the parameters related to the current first cell can be matched according to the parameters related to the first cell in the parameters and the correspondence table between the preset parameters and the impedance of the first cell. Similarly, the second impedance of the second cell under the parameters related to the current second cell can be matched according to the parameters related to the second cell in the parameters and the correspondence table between the preset parameters and the impedance of the second cell.

[0127] The first impedance is compared with the second impedance. When the first impedance is smaller than the second impedance, the target battery cell is the first battery cell. When the first impedance is larger than the second impedance, the target battery cell is the second battery cell.

[0128] The target battery cell is discharged, and the parameters corresponding to the first battery cell and the second battery cell are polled. When the magnitude relationship between the first impedance and the second impedance changes, the battery cell can be switched for discharge.

[0129] In this way, during the discharge process of the battery, the battery cell with lower impedance can be determined according to the real-time parameters to perform the discharge operation until the battery is fully discharged. In this way, it can be ensured that the discharge impedance is always low during the discharge process, thereby improving the battery life.

[0130] In some embodiments, the parameter includes temperature, a voltage of the first battery cell, and a voltage of the second battery cell;

[0131] Discharging a target cell in the first cell and the second cell according to the parameter may include:

[0132] When the temperature is greater than or equal to the first temperature threshold, determining the first battery cell as the target battery cell and discharging the first battery cell;

[0133] When the voltage of the first battery cell is discharged to the third voltage threshold, the target battery cell is switched from the first battery cell to the second battery cell and discharged until the voltage of the second battery cell is discharged to the fourth voltage threshold;

[0134] Among them, the first temperature threshold is the temperature critical value corresponding to the first impedance being continuously less than the second impedance, the third voltage threshold is the lowest voltage that can be reached during the discharge process of the first battery cell, and the fourth voltage threshold is the lowest voltage that can be reached during the discharge process of the second battery cell.

[0135] In this embodiment, the parameters may include temperature, the voltage of the first battery cell, and the voltage of the second battery cell. A first temperature threshold, a third voltage threshold, and a fourth voltage threshold may also be obtained. Among them, the third voltage threshold is the lowest voltage that can be reached during the discharge process of the first battery cell, and the fourth voltage threshold is the lowest voltage that can be reached during the discharge process of the second battery cell. The third voltage threshold and the fourth voltage threshold may be pre-set, may be the same value, or may be different values, and may be set specifically according to actual conditions.

[0136] For the first temperature threshold, the first temperature threshold can be determined according to the correspondence table between the preset parameters and the impedance of the first battery cell, and the correspondence table between the parameters and the impedance of the second battery cell. The first temperature threshold is the temperature critical value corresponding to the first impedance being continuously less than the second impedance. That is, if the temperature exceeds the first temperature threshold, the first impedance is always less than the second impedance.

[0137] In order to facilitate the description of the technical solution of this embodiment, the following description will be made by taking the first negative electrode plate as a graphene negative electrode plate and the second negative electrode plate as a silicon negative electrode plate as an example. In other words, the first battery cell is a graphene battery cell and the second battery cell is a silicon negative electrode battery cell, wherein the third voltage threshold and the fourth voltage threshold can be 2.7V. Figure 3 and Figure 4 The relationship diagram between impedance and parameters shown in FIG. 1 determines that the first temperature threshold is 25° C.

[0138] When the temperature is greater than or equal to the first temperature threshold, the first battery cell can be determined as the target battery cell and discharged. When the voltage of the first battery cell is discharged to a third voltage threshold, the target battery cell can be switched from the first battery cell to the second battery cell and discharged. When the voltage of the second battery cell is discharged to a fourth voltage threshold, the discharge is terminated.

[0139] For example, Fig. 9 As shown, the discharge method may include:

[0140] Step 901, obtaining the current temperature of the battery, if the temperature is greater than or equal to 25°C, then step 902 may be executed;

[0141] Step 902, the graphene battery cell is discharged to 2.7V;

[0142] Step 903, switch the silicon negative electrode cell to discharge to 2.7V.

[0143] In this way, based on the first temperature threshold that characterizes that the first impedance is continuously less than the temperature critical value corresponding to the second impedance, it can be determined that when the temperature is above the first temperature threshold, the first battery cell can be determined as the target battery cell, and the second battery cell can be switched for discharge after discharging. There is no need to compare the first impedance and the second impedance in real time. During the discharge process, it can be ensured that the discharge impedance is always low, thereby improving the battery life and saving computing power.

[0144] In some embodiments, discharging a target battery cell in the first battery cell and the second battery cell according to the parameter may further include:

[0145] When the temperature is lower than the first temperature threshold and the voltage of the first battery cell is higher than the fifth voltage threshold, the first battery cell is determined as the target battery cell and discharged;

[0146] When the voltage of the first battery cell is discharged to a fifth voltage threshold and the temperature is still lower than the first temperature threshold, switching the target battery cell from the first battery cell to the second battery cell and discharging the target battery cell;

[0147] The fifth voltage threshold is a discharge voltage critical value corresponding to a first impedance that is continuously greater than the second impedance when the temperature is less than the first temperature threshold, and the fifth voltage threshold is greater than the third voltage threshold.

[0148] In this embodiment, a fifth voltage threshold may be predetermined, which is a critical discharge voltage value of the first battery cell corresponding to the first impedance being continuously greater than the second impedance when the temperature is less than the first temperature threshold. The fifth voltage threshold may be greater than the third voltage threshold. Figure 3 and Figure 4 It can be seen that when the temperature is between -10℃ and 25℃, the voltage of the graphene battery cell is in the range of 2.7 to 3.7V, and the impedance of the graphene battery cell is always smaller than the impedance of the silicon negative electrode battery cell. Therefore, 3.7V can be set as the fifth voltage threshold corresponding to the graphene battery cell.

[0149] Based on this, when the temperature is lower than the first temperature threshold and the voltage of the first battery cell is higher than the fifth voltage threshold, the first battery cell is determined as the target battery cell and discharged; when the voltage of the first battery cell is discharged to the fifth voltage threshold and the temperature is still lower than the first temperature threshold, the target battery cell is switched from the first battery cell to the second battery cell and discharged.

[0150] For example, Fig. 9 As shown, the discharge method may include:

[0151] Step 901, obtaining the current temperature of the battery, if the temperature is less than 25°C, then step 904 may be executed;

[0152] Step 904, the graphene battery cell is discharged, and the temperature of the battery is detected in real time. If the temperature is still less than 25°C, step 905 may be executed; if the temperature is greater than or equal to 25°C, step 911 may be executed;

[0153] Step 905, the graphene battery cell is discharged to 3.7V;

[0154] Step 906, switch the silicon negative electrode cell to discharge, and detect the battery temperature in real time. In some examples, the silicon negative electrode cell can be directly discharged to 2.7V, and then the graphene cell can be switched to continue to discharge to 2.7V. In other examples, it is also possible to further determine the battery cell with lower impedance to discharge first according to the battery temperature, until both cells are discharged to 2.7V, and then the discharge is terminated.

[0155] Step 911, the graphene battery cell is discharged to 2.7V;

[0156] Step 912, switch the silicon negative electrode cell to discharge to 2.7V.

[0157] In this way, the first temperature threshold and the fifth voltage threshold can be used as reference values ​​of the parameters to directly determine the target battery cell with lower impedance. There is no need to compare the first impedance and the second impedance in real time. This can ensure that the discharge impedance is low during the discharge process, thereby improving the battery life and saving computing power.

[0158] In some embodiments, after the target battery cell is switched from the first battery cell to the second battery cell and discharged, the discharging method may further include:

[0159] When the temperature is greater than or equal to the first temperature threshold, or the voltage of the second battery cell is discharged to the fourth voltage threshold, the target battery cell is switched from the second battery cell to the first battery cell and discharged until the voltage of the first battery cell is discharged to the third voltage threshold.

[0160] In this embodiment, after the target battery cell is switched from the first battery cell to the second battery cell and discharged, a target battery cell with a lower impedance may be further determined based on the temperature.

[0161] In other words, the target battery cell is switched from the first battery cell to the second battery cell and discharged until the temperature is greater than or equal to the first temperature threshold, or, when the voltage of the second battery cell is discharged to the fourth voltage threshold, the target battery cell is switched from the second battery cell to the first battery cell and discharged until the voltage of the first battery cell is discharged to the third voltage threshold.

[0162] For example, Fig. 9 As shown, the discharge method further includes:

[0163] Step 906, switch the silicon negative electrode cell to discharge, and detect the temperature of the battery in real time. If the temperature is greater than or equal to 25°C, step 909 may be executed; if the temperature is less than 25°C, step 907 may be executed;

[0164] Step 907, discharge the silicon negative electrode cell to 2.7V;

[0165] Step 908, switching the graphene battery cell to discharge to 2.7V;

[0166] Step 909, switch the graphene battery cell to discharge to 2.7V;

[0167] Step 910, switch the silicon negative electrode cell to discharge to 2.7V.

[0168] In this way, the target battery cell with lower impedance can be further determined based on the first temperature threshold, without having to compare the first impedance and the second impedance in real time. This can ensure that the discharge impedance is always low during the discharge process, further improving the battery life while saving computing power.

[0169] The charging method provided in the embodiment of the present application can be executed by a charging device. In the embodiment of the present application, the charging method is executed by a charging device as an example to illustrate the charging device provided in the embodiment of the present application.

[0170] See also Fig.10 , the charging device 1000 may include:

[0171] A first acquisition module 1001 is used to acquire parameters corresponding to the first battery cell and the second battery cell;

[0172] A charging module 1002, configured to charge a target battery cell among the first battery cell and the second battery cell according to the parameters;

[0173] Among them, when the first impedance is less than the second impedance, the target battery cell is the first battery cell, and when the first impedance is greater than the second impedance, the target battery cell is the second battery cell. The first impedance is the impedance corresponding to the first battery cell under the parameters, and the second impedance is the impedance corresponding to the second battery cell under the parameters.

[0174] In this way, during the battery charging process, the battery cell with lower impedance can be determined according to the real-time parameters to perform the charging operation until it is fully charged. In this way, it can be ensured that the charging impedance is always low during the charging process, shortening the charging time.

[0175] In some embodiments, the parameter includes temperature, a voltage of the first battery cell, and a voltage of the second battery cell;

[0176] The charging module 1002 can also be used for:

[0177] When the temperature is greater than or equal to a first temperature threshold, determining the first battery cell as a target battery cell and charging the first battery cell;

[0178] When the voltage of the first battery cell is charged to the first voltage threshold, the target battery cell is switched from the first battery cell to the second battery cell and charged until the voltage of the second battery cell is charged to the second voltage threshold;

[0179] Among them, the first temperature threshold is the temperature critical value corresponding to the first impedance being continuously less than the second impedance, the first voltage threshold is the voltage corresponding to the first battery cell being in a fully charged state, and the second voltage threshold is the voltage corresponding to the second voltage being in a fully charged state.

[0180] In this way, based on the first temperature threshold that characterizes that the first impedance is continuously less than the temperature critical value corresponding to the second impedance, it can be determined that when the temperature is above the first temperature threshold, the first battery cell can be determined as the target battery cell, and the second battery cell can be switched to charge after being fully charged. There is no need to compare the first impedance and the second impedance in real time. During the charging process, it can be ensured that the charging impedance is always low, shortening the charging time while saving computing power.

[0181] In some embodiments, the charging module 1002 may also be used to:

[0182] When the temperature is less than the first temperature threshold, determining the second battery cell as the target battery cell and charging it;

[0183] When the temperature is greater than or equal to the first temperature threshold, or the voltage of the second battery cell is charged to the second voltage threshold, the target battery cell is switched from the second battery cell to the first battery cell and charged until the voltage of the first battery cell is charged to the first voltage threshold.

[0184] In this way, the first temperature threshold, the first voltage threshold and the second voltage threshold can be used as reference values ​​of the parameters to directly determine the target battery cell with lower impedance. There is no need to compare the first impedance and the second impedance in real time. This can ensure that the charging impedance is always low during the charging process, shorten the charging time and save computing power.

[0185] The discharge method provided in the embodiment of the present application can be performed by a discharge device. In the embodiment of the present application, the discharge method performed by the discharge device is taken as an example to illustrate the discharge device provided in the embodiment of the present application.

[0186] See also Fig.11 , the discharge device 1100 may include:

[0187] The second acquisition module 1101 is used to acquire parameters corresponding to the first battery cell and the second battery cell;

[0188] A discharging module 1102, configured to discharge a target battery cell in the first battery cell and the second battery cell according to the parameters;

[0189] Among them, when the first impedance is less than the second impedance, the target battery cell is the first battery cell, and when the first impedance is greater than the second impedance, the target battery cell is the second battery cell. The first impedance is the impedance corresponding to the first battery cell under the parameters, and the second impedance is the impedance corresponding to the second battery cell under the parameters.

[0190] In this way, during the discharge process of the battery, the battery cell with lower impedance can be determined according to the real-time parameters to perform the discharge operation until the battery is fully discharged. In this way, it can be ensured that the discharge impedance is always low during the discharge process, thereby improving the battery life.

[0191] In some embodiments, the parameter includes temperature, a voltage of the first battery cell, and a voltage of the second battery cell;

[0192] The discharge module 1102 can also be used for:

[0193] When the temperature is greater than or equal to the first temperature threshold, determining the first battery cell as the target battery cell and discharging the first battery cell;

[0194] When the voltage of the first battery cell is discharged to the third voltage threshold, the target battery cell is switched from the first battery cell to the second battery cell and discharged until the voltage of the second battery cell is discharged to the fourth voltage threshold;

[0195] Among them, the first temperature threshold is the temperature critical value corresponding to the first impedance being continuously less than the second impedance, the third voltage threshold is the lowest voltage that can be reached during the discharge process of the first battery cell, and the fourth voltage threshold is the lowest voltage that can be reached during the discharge process of the second battery cell.

[0196] In this way, based on the first temperature threshold that characterizes that the first impedance is continuously less than the temperature critical value corresponding to the second impedance, it can be determined that when the temperature is above the first temperature threshold, the first battery cell can be determined as the target battery cell, and the second battery cell can be switched for discharge after discharging. There is no need to compare the first impedance and the second impedance in real time. During the discharge process, it can be ensured that the discharge impedance is always low, thereby improving the battery life and saving computing power.

[0197] In some embodiments, the discharge module 1102 may also be used to:

[0198] When the temperature is lower than the first temperature threshold and the voltage of the first battery cell is higher than the fifth voltage threshold, the first battery cell is determined as the target battery cell and discharged;

[0199] When the voltage of the first battery cell is discharged to a fifth voltage threshold and the temperature is still lower than the first temperature threshold, switching the target battery cell from the first battery cell to the second battery cell and discharging the target battery cell;

[0200] The fifth voltage threshold is a discharge voltage critical value corresponding to a first impedance that is continuously greater than the second impedance when the temperature is less than the first temperature threshold, and the fifth voltage threshold is greater than the third voltage threshold.

[0201] In this way, the first temperature threshold and the fifth voltage threshold can be used as reference values ​​of the parameters to directly determine the target battery cell with lower impedance. There is no need to compare the first impedance and the second impedance in real time. This can ensure that the discharge impedance is low during the discharge process, thereby improving the battery life and saving computing power.

[0202] In some embodiments, the discharge module 1102 may also be used to:

[0203] After the target battery cell is switched from the first battery cell to the second battery cell and discharged, when the temperature is greater than or equal to the first temperature threshold, or the voltage of the second battery cell is discharged to the fourth voltage threshold, the target battery cell is switched from the second battery cell to the first battery cell and discharged until the voltage of the first battery cell is discharged to the third voltage threshold.

[0204] In this way, the target battery cell with lower impedance can be further determined based on the first temperature threshold, without having to compare the first impedance and the second impedance in real time. This can ensure that the discharge impedance is always low during the discharge process, further improving the battery life while saving computing power.

[0205] The charging device and the discharging device in the embodiment of the present application can be an electronic device, or a component in the electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or it can be other devices other than a terminal. Exemplarily, the electronic device can be a mobile phone, a tablet computer, a laptop computer, a PDA, a vehicle-mounted electronic device, a mobile Internet device (Mobile Internet Device, MID), an augmented reality (augmented reality, AR) / virtual reality (virtual reality, VR) device, a robot, a wearable device, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a netbook or a personal digital assistant (personal digital assistant, PDA), etc., and can also be a server, a network attached storage (Network Attached Storage, NAS), a personal computer (personal computer, PC), a television (television, TV), a teller machine or a self-service machine, etc., which is not specifically limited in the embodiment of the present application.

[0206] The charging device and the discharging device in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0207] The charging device and discharging device provided in the embodiments of the present application can implement each process implemented in the method embodiments, and will not be described again here to avoid repetition.

[0208] Alternatively, if Fig.12 As shown, an embodiment of the present application also provides an electronic device 1200, including a processor 1201 and a memory 1202, wherein the memory 1202 stores programs or instructions that can be executed on the processor 1201, and when the program or instructions are executed by the processor 1201, the various steps of the above-mentioned control method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, they are not described here.

[0209] It should be noted that the electronic devices in the embodiments of the present application include the above-mentioned mobile electronic devices and non-mobile electronic devices.

[0210] Fig.13 A schematic diagram of the hardware structure of an electronic device to implement an embodiment of the present application.

[0211] The electronic device 1300 includes but is not limited to: a radio frequency unit 1301, a network module 1302, an audio output unit 1303, an input unit 1304, a sensor 1305, a display unit 1306, a user input unit 1307, an interface unit 1308, a memory 1309, and a processor 1310 and other components.

[0212] Those skilled in the art will appreciate that the electronic device 1300 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 1310 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.13 The electronic device structure shown in the figure does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0213] The processor 1310 may be used for:

[0214] Obtain parameters corresponding to the first battery cell and the second battery cell;

[0215] charging a target battery cell in the first battery cell and the second battery cell according to the parameters;

[0216] Among them, when the first impedance is less than the second impedance, the target battery cell is the first battery cell, and when the first impedance is greater than the second impedance, the target battery cell is the second battery cell. The first impedance is the impedance corresponding to the first battery cell under the parameters, and the second impedance is the impedance corresponding to the second battery cell under the parameters.

[0217] In this way, during the battery charging process, the battery cell with lower impedance can be determined according to the real-time parameters to perform the charging operation until it is fully charged. In this way, it can be ensured that the charging impedance is always low during the charging process, shortening the charging time.

[0218] In some embodiments, the parameter includes temperature, voltage of the first battery cell, and voltage of the second battery cell; the processor 1310 may also be used to:

[0219] When the temperature is greater than or equal to a first temperature threshold, determining the first battery cell as a target battery cell and charging the first battery cell;

[0220] When the voltage of the first battery cell is charged to the first voltage threshold, the target battery cell is switched from the first battery cell to the second battery cell and charged until the voltage of the second battery cell is charged to the second voltage threshold;

[0221] Among them, the first temperature threshold is the temperature critical value corresponding to the first impedance being continuously less than the second impedance, the first voltage threshold is the voltage corresponding to the first battery cell being in a fully charged state, and the second voltage threshold is the voltage corresponding to the second voltage being in a fully charged state.

[0222] In this way, based on the first temperature threshold that characterizes that the first impedance is continuously less than the temperature critical value corresponding to the second impedance, it can be determined that when the temperature is above the first temperature threshold, the first battery cell can be determined as the target battery cell, and the second battery cell can be switched to charge after being fully charged. There is no need to compare the first impedance and the second impedance in real time. During the charging process, it can be ensured that the charging impedance is always low, shortening the charging time while saving computing power.

[0223] In some embodiments, the processor 1310 may also be configured to:

[0224] When the temperature is less than the first temperature threshold, determining the second battery cell as the target battery cell and charging it;

[0225] When the temperature is greater than or equal to the first temperature threshold, or the voltage of the second battery cell is charged to the second voltage threshold, the target battery cell is switched from the second battery cell to the first battery cell and charged until the voltage of the first battery cell reaches the first voltage threshold.

[0226] In this way, the first temperature threshold, the first voltage threshold and the second voltage threshold can be used as reference values ​​of the parameters to directly determine the target battery cell with lower impedance. There is no need to compare the first impedance and the second impedance in real time. This can ensure that the charging impedance is always low during the charging process, shorten the charging time and save computing power.

[0227] The processor 1310 may also be used for:

[0228] Obtain parameters corresponding to the first battery cell and the second battery cell;

[0229] Discharging a target battery cell in the first battery cell and the second battery cell according to the parameter;

[0230] Among them, when the first impedance is less than the second impedance, the target battery cell is the first battery cell, and when the first impedance is greater than the second impedance, the target battery cell is the second battery cell. The first impedance is the impedance corresponding to the first battery cell under the parameters, and the second impedance is the impedance corresponding to the second battery cell under the parameters.

[0231] In this way, during the discharge process of the battery, the battery cell with lower impedance can be determined according to the real-time parameters to perform the discharge operation until the battery is fully discharged. In this way, it can be ensured that the discharge impedance is always low during the discharge process, thereby improving the battery life.

[0232] In some embodiments, the parameter includes temperature, voltage of the first battery cell, and voltage of the second battery cell; the processor 1310 may also be used to:

[0233] When the temperature is greater than or equal to the first temperature threshold, determining the first battery cell as the target battery cell and discharging the first battery cell;

[0234] When the voltage of the first battery cell is discharged to the third voltage threshold, the target battery cell is switched from the first battery cell to the second battery cell and discharged until the voltage of the second battery cell is discharged to the fourth voltage threshold;

[0235] Among them, the first temperature threshold is the temperature critical value corresponding to the first impedance being continuously less than the second impedance, the third voltage threshold is the lowest voltage that can be reached during the discharge process of the first battery cell, and the fourth voltage threshold is the lowest voltage that can be reached during the discharge process of the second battery cell.

[0236] In this way, based on the first temperature threshold that characterizes that the first impedance is continuously less than the temperature critical value corresponding to the second impedance, it can be determined that when the temperature is above the first temperature threshold, the first battery cell can be determined as the target battery cell, and the second battery cell can be switched for discharge after discharging. There is no need to compare the first impedance and the second impedance in real time. During the discharge process, it can be ensured that the discharge impedance is always low, thereby improving the battery life and saving computing power.

[0237] In some embodiments, the processor 1310 may also be configured to:

[0238] When the temperature is lower than the first temperature threshold and the voltage of the first battery cell is higher than the fifth voltage threshold, the first battery cell is determined as the target battery cell and discharged;

[0239] When the voltage of the first battery cell is discharged to a fifth voltage threshold and the temperature is still lower than the first temperature threshold, switching the target battery cell from the first battery cell to the second battery cell and discharging the target battery cell;

[0240] The fifth voltage threshold is a discharge voltage critical value corresponding to a first impedance that is continuously greater than the second impedance when the temperature is less than the first temperature threshold, and the fifth voltage threshold is greater than the third voltage threshold.

[0241] In this way, the first temperature threshold and the fifth voltage threshold can be used as reference values ​​of the parameters to directly determine the target battery cell with lower impedance. There is no need to compare the first impedance and the second impedance in real time. This can ensure that the discharge impedance is low during the discharge process, thereby improving the battery life and saving computing power.

[0242] In some embodiments, the processor 1310 may also be configured to:

[0243] After the target battery cell is switched from the first battery cell to the second battery cell and discharged, when the temperature is greater than or equal to the first temperature threshold, or the voltage of the second battery cell is discharged to the fourth voltage threshold, the target battery cell is switched from the second battery cell to the first battery cell and discharged until the voltage of the first battery cell is discharged to the third voltage threshold.

[0244] In this way, the target battery cell with lower impedance can be further determined based on the first temperature threshold, without having to compare the first impedance and the second impedance in real time. This can ensure that the discharge impedance is always low during the discharge process, further improving the battery life while saving computing power.

[0245] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned control method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0246] The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

[0247] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned control method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0248] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0249] An embodiment of the present application provides a computer program product, which is stored in a storage medium. The program product is executed by at least one processor to implement the various processes of the above-mentioned control method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0250] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0251] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0252] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0253] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery, characterized in that: include: A stacked and wound positive electrode sheet, a separator, a first negative electrode sheet and a second negative electrode sheet; The first negative electrode sheet, the positive electrode sheet and the separator form a first battery cell, and the second negative electrode sheet, the positive electrode sheet and the separator form a second battery cell; There is a difference in impedance between the first negative electrode plate and the second negative electrode plate under the same parameters, and the parameters include at least one of temperature and voltage.

2. The battery according to claim 1, characterized in that The first negative electrode plate is a graphene negative electrode plate, and the second negative electrode plate is a silicon negative electrode plate.

3. A charging and discharging circuit applied to the battery according to claim 1 or 2, characterized in that: include: A first battery cell module and a second battery cell module; a parameter acquisition module connected to the first battery cell module and the second battery cell module, the parameter acquisition module comprising at least one of an electric meter module and a temperature sensing module, the electric meter module being used to acquire the voltage of the first battery cell module and the second battery cell module, and the temperature sensing module being used to acquire the temperature of the first battery cell module and the second battery cell module; a switch control module, connected to the first battery cell module and the second battery cell module, and used to control the connection state between the first battery cell module and the second battery cell module; A charging and discharging module is connected to the parameter acquisition module and the switch control module, and is used to generate a control signal according to the parameters collected by the parameter acquisition module, and send the control signal to the switch control module so that the switch control module controls one of the first battery cell module and the second battery cell module to be connected and the other to be disconnected.

4. An electronic device, characterized in that: Comprising the battery as claimed in claim 1 or 2, or the charging and discharging circuit as claimed in claim 3.

5. A charging method, applied to the battery as claimed in claim 1 or 2, characterized in that: The method comprises: Obtain parameters corresponding to the first battery cell and the second battery cell; According to the parameters, charging the target battery cell among the first battery cell and the second battery cell; Among them, when the first impedance is less than the second impedance, the target battery cell is the first battery cell, and when the first impedance is greater than the second impedance, the target battery cell is the second battery cell. The first impedance is the impedance corresponding to the first battery cell under the parameters, and the second impedance is the impedance corresponding to the second battery cell under the parameters.

6. The method according to claim 5, characterized in that The parameters include temperature, voltage of the first battery cell, and voltage of the second battery cell; The charging of the target battery cell in the first battery cell and the second battery cell according to the parameter includes: When the temperature is greater than or equal to a first temperature threshold, determining the first battery cell as the target battery cell and charging the first battery cell; When the voltage of the first battery cell is charged to a first voltage threshold, switching the target battery cell from the first battery cell to the second battery cell and charging the target battery cell until the voltage of the second battery cell is charged to a second voltage threshold; Among them, the first temperature threshold is the temperature critical value corresponding to the first impedance being continuously less than the second impedance, the first voltage threshold is the voltage corresponding to the first battery cell being in a fully charged state, and the second voltage threshold is the voltage corresponding to the second voltage being in a fully charged state.

7. The method according to claim 6, characterized in that The charging of the target battery cell in the first battery cell and the second battery cell according to the parameter further includes: When the temperature is less than the first temperature threshold, determining the second battery cell as the target battery cell and charging the second battery cell; When the temperature is greater than or equal to the first temperature threshold, or when the voltage of the second battery cell is charged to the second voltage threshold, the target battery cell is switched from the second battery cell to the first battery cell and charged until the voltage of the first battery cell is charged to the first voltage threshold.

8. A discharge method, applied to the battery as claimed in claim 1 or 2, characterized in that: The method comprises: Obtain parameters corresponding to the first battery cell and the second battery cell; Discharging a target battery cell in the first battery cell and the second battery cell according to the parameter; Among them, when the first impedance is less than the second impedance, the target battery cell is the first battery cell, and when the first impedance is greater than the second impedance, the target battery cell is the second battery cell. The first impedance is the impedance corresponding to the first battery cell under the parameters, and the second impedance is the impedance corresponding to the second battery cell under the parameters.

9. The method according to claim 8, characterized in that The parameters include temperature, voltage of the first battery cell, and voltage of the second battery cell; The step of discharging a target battery cell in the first battery cell and the second battery cell according to the parameter includes: When the temperature is greater than or equal to a first temperature threshold, determining the first battery cell as the target battery cell and discharging the first battery cell; When the voltage of the first battery cell is discharged to a third voltage threshold, the target battery cell is switched from the first battery cell to the second battery cell and discharged until the voltage of the second battery cell is discharged to a fourth voltage threshold; Among them, the first temperature threshold is the temperature critical value corresponding to the first impedance being continuously less than the second impedance, the third voltage threshold is the lowest voltage that can be reached during the discharge process of the first battery cell, and the fourth voltage threshold is the lowest voltage that can be reached during the discharge process of the second battery cell.

10. The method according to claim 9, characterized in that The step of discharging the target battery cell in the first battery cell and the second battery cell according to the parameter further includes: When the temperature is lower than the first temperature threshold and the voltage of the first battery cell is higher than a fifth voltage threshold, determining the first battery cell as the target battery cell and discharging the first battery cell; When the voltage of the first battery cell is discharged to the fifth voltage threshold and the temperature is still lower than the first temperature threshold, switching the target battery cell from the first battery cell to the second battery cell and discharging the target battery cell; The fifth voltage threshold is a discharge voltage critical value corresponding to a situation where the first impedance is continuously greater than the second impedance when the temperature is less than the first temperature threshold, and the fifth voltage threshold is greater than the third voltage threshold.

11. The method according to claim 10, characterized in that After switching the target battery cell from the first battery cell to the second battery cell and discharging the battery cell, the method further includes: When the temperature is greater than or equal to the first temperature threshold, or when the voltage of the second battery cell is discharged to the fourth voltage threshold, the target battery cell is switched from the second battery cell to the first battery cell and discharged until the voltage of the first battery cell is discharged to the third voltage threshold.

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