Electronic device, calibration system, and control method

Abstract

Provided in the present application are an electronic device, a calibration system, and a control method. The electronic device comprises: a charging module, a battery module, a collection module, and a control module, wherein the charging module is used for providing a main charging current for the battery module; the battery module comprises a first battery cell and a second battery cell, which are connected in parallel; the collection module comprises a first collection module and a second collection module, which first collection module is used for acquiring charging currents for the first battery cell, and which the second collection module is used for acquiring charging currents for the second battery cell or the main charging current; and the control module is used for controlling, on the basis of the charging currents collected by the collection module, the main charging current provided by the charging module. The electronic device, the calibration system and the control method provided in the present application can ensure the charging safety of each battery cell while improving the charging efficiency.

Description

Electronic equipment, calibration systems and control methods

[0001] This application claims priority to Chinese Patent Application No. 202410511912.9, filed on April 25, 2024, entitled "Electronic Device, Calibration System and Control Method", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of circuits, and more specifically, to an electronic device, a calibration system, and a control method. Background Technology

[0003] With the continuous development of electronic devices such as mobile phones, tablets, and personal computers, people's demand for longer battery life is also gradually increasing. However, the actual internal space of electronic devices is limited. In order to accommodate a larger capacity battery within this limited space, multiple battery cells can be coupled in parallel and packaged into a single battery. Different battery cells have different internal resistance characteristics, which means that when charging an electronic device, different cells will receive different charging currents. The safe charging current thresholds for different cells will also differ. When charging an electronic device with a certain total charging current, cells with weaker charging capabilities may face the risk of exceeding the safe charging current threshold.

[0004] Therefore, how to arrange batteries with the largest possible capacity while ensuring charging safety is an urgent problem to be solved. Summary of the Invention

[0005] This application provides an electronic device, a calibration system, and a control method that can maximize the layout of a larger capacity battery while ensuring charging safety.

[0006] In a first aspect, an electronic device is provided, comprising: a charging module connected to a first end of a battery module for providing a total charging current to the battery module; the battery module including a first branch and a second branch connected in parallel, the first branch including a first battery cell and a first resistor connected in series, and the second branch including a second battery cell; a data acquisition module including a first data acquisition module and a second data acquisition module, the first data acquisition module being connected in parallel with the first resistor to acquire a first current, the first current being the charging current of the first battery cell, and the second data acquisition module being used to acquire a second current, the second current being the charging current of the second battery cell or the total charging current; and a control module connected to the charging module for controlling the total charging current provided by the charging module according to the first current and the second current.

[0007] The first resistor can be a sampling resistor, and the current through the first resistor is the charging current of the first battery cell.

[0008] Based on the above scheme, the battery module in the electronic device can be arranged with multiple parallel cells, which can increase the battery capacity; the acquisition module in the electronic device can obtain the charging current of each cell separately, and the control module can control the total charging current provided by the charging module according to the charging current of each cell, so as to ensure the charging safety of each cell when the electronic device is charging.

[0009] In conjunction with the first aspect, in some implementations of the first aspect, the battery module further includes a second resistor, the first end of the first branch and the first end of the second branch are both connected to the first end of the second resistor, the second end of the second resistor is grounded, the second acquisition module is connected in parallel with the second resistor, and the second current is the total charging current.

[0010] The second resistor can be a data acquisition resistor, and the current through the second resistor is the total charging current of the battery module.

[0011] Based on the above scheme, if the battery module includes N (N is a positive integer greater than or equal to 2) cells, the charging current of each cell in the battery module can be determined by obtaining the total charging current of the battery module and the charging current of N-1 cells respectively, so as to ensure the charging safety of each cell.

[0012] In conjunction with the first aspect, in some implementations of the first aspect, the second branch further includes a third resistor connected in series with the second battery cell, the second acquisition module is connected in parallel with the third resistor, and the second current is the charging current of the second battery cell.

[0013] Based on the above scheme, the charging current of each battery cell can be directly obtained to ensure the charging safety of each battery cell.

[0014] In conjunction with the first aspect, in some implementations of the first aspect, the control module is connected to the acquisition module to acquire the first current and the second current; the control module is specifically used to control the total charging current provided by the charging module according to the charging current of the first battery cell and the charging current of the second battery cell.

[0015] The control module stores the current threshold values ​​for the first battery cell and the second battery cell. The current threshold value for the first battery cell is its safety threshold, which can be understood as the maximum charging current value of the first battery cell; similarly, the current threshold value for the second battery cell is its safety threshold, which can also be understood as the maximum charging current value of the second battery cell. The control module can determine whether the charging current of the first battery cell exceeds its safety threshold value, and it can also determine whether the charging current of the second battery cell exceeds its safety threshold value.

[0016] Based on the above scheme, the charging current and safety threshold of each cell in the battery module are determined by the control module to ensure the charging safety of each cell in the battery module.

[0017] In conjunction with the first aspect, in certain implementations of the first aspect, when the control module determines that the charging current of the first battery cell is greater than the first current threshold and the charging current of the second battery cell is less than or equal to the second current threshold, the control module is specifically used to control the charging module to reduce the total charging current; when the control module determines that the charging current of the first battery cell is less than or equal to the first current threshold and the charging current of the second battery cell is greater than the second current threshold, the control module is specifically used to control the charging module to reduce the total charging current; when the control module determines that the charging current of the first battery cell is greater than the first current threshold and the charging current of the second battery cell is greater than the second current threshold, the control module is specifically used to control the charging module to reduce the total charging current.

[0018] Based on the above scheme, when the control module determines that the charging current of any cell in the battery module exceeds the safe current, the control module controls the charging module to reduce the total charging current, which can ensure the charging safety of each cell in the battery module.

[0019] In conjunction with the first aspect, in some implementations of the first aspect, when the control module determines that the charging current of the first battery cell is less than the first current threshold and the charging current of the second battery cell is less than the second current threshold, the control module is specifically used to control the charging module to increase the total charging current.

[0020] Based on the above scheme, when the charging current of each cell is less than the safety threshold, the control module can control the increase of the total charging current to improve charging efficiency.

[0021] In conjunction with the first aspect, in some implementations of the first aspect, the battery module further includes at least one third branch, each of the at least one third branch including a third cell and a fourth resistor connected in series, the third branch being connected in parallel with the first branch and the second branch; the acquisition module further includes a third acquisition module connected in parallel with the fourth resistor to acquire a third current, the third current being the charging current of the third cell; the control module is used to control the total charging current provided by the charging module according to the first current, the second current and the third current.

[0022] Based on the above scheme, more parallel battery cells can be arranged according to the actual space inside the electronic device to obtain a larger battery capacity.

[0023] In conjunction with the first aspect, in some implementations of the first aspect, the control module is connected to the acquisition module to acquire the first current, the second current and the third current; the control module is specifically used to control the total charging current provided by the charging module according to the charging current of the first battery cell, the charging current of the second battery cell and the charging current of the third battery cell.

[0024] Based on the above scheme, the charging current and safety threshold of each cell in the battery module are determined by the control module to ensure the charging safety of each cell in the battery module.

[0025] In conjunction with the first aspect, in some implementations of the first aspect, the electronic device further includes a discharge module connected to the charging module and the control module, the discharge module being used to supply power to the electronic device.

[0026] In conjunction with the first aspect, in some implementations of the first aspect, the battery module includes a first region and a second region, the first region being used to house the first battery cell and the second region being used to house the second battery cell, the first battery cell having a different size from the second battery cell to form a free space in the electronic device.

[0027] Based on the above solution, multiple battery cells of different sizes can be arranged inside electronic devices, so as to arrange as many battery cells as possible in the limited internal space of electronic devices, while also saving some space for other hardware devices.

[0028] In a second aspect, a calibration system and an electronic device are provided. The electronic device includes a data acquisition module, which includes a first data acquisition module and a second data acquisition module; a calibration module, which includes a first calibration circuit and a second calibration circuit. The first calibration circuit includes a calibration power supply and a fifth resistor connected in series. The second calibration circuit includes the calibration power supply and a sixth resistor connected in series. The second calibration circuit and the first calibration circuit are connected in parallel. The calibration power supply is used to provide a calibration current. The first data acquisition module and the fifth resistor are connected in parallel to obtain the loop current of the first calibration circuit. The second data acquisition module and the sixth resistor are connected in parallel to obtain the loop current of the second calibration circuit.

[0029] The fifth and sixth resistors can be used as data acquisition resistors. The current through the fifth resistor is the loop current of the first calibration circuit, and the current through the sixth resistor is the loop current of the second calibration circuit.

[0030] Based on the above scheme, the calibration module in the electronic device can calibrate each sub-module (including the first acquisition module and the second acquisition module) in the acquisition module. Specifically, the first acquisition module and the second acquisition module can be calibrated by the loop current in each calibration circuit of the calibration module.

[0031] In conjunction with the second aspect, in some implementations of the second aspect, the calibration module further includes a controller, which is configured to determine a first calibration coefficient based on the loop current of the first calibration circuit and the calibration current, and to determine a second calibration coefficient based on the loop current of the second calibration circuit and the calibration current.

[0032] The controller can be a PC controller, and the calibration current is provided by the calibration power supply. The PC controller calibrates the loop current of the first calibration circuit acquired by the first acquisition module based on the calibration current, obtaining a first calibration coefficient to calibrate the first acquisition module; and based on the calibration current, it calibrates the loop current of the second calibration circuit acquired by the second acquisition module, obtaining a second calibration coefficient to calibrate the second acquisition module.

[0033] Based on the above scheme, the controller of the calibration module can calibrate each sub-module in the acquisition module, so that the sub-modules in the acquisition module can more accurately obtain the charging current of each cell in the electronic device.

[0034] In conjunction with the second aspect, in some implementations of the second aspect, a control module, which is connected to the acquisition module, is used to acquire the loop current of the first calibration circuit and the loop current of the second calibration circuit; a controller is connected to the control module to acquire the loop current of the first calibration circuit and the loop current of the second calibration circuit through the control module.

[0035] The control module is connected to the acquisition module and can acquire the loop current of the first calibration circuit and the loop current of the second calibration circuit, and transmit them to the controller so that the controller can calibrate the first acquisition module and the second acquisition module according to the loop current of the first calibration circuit, the loop current of the second calibration circuit and the calibration current respectively.

[0036] Based on the above scheme, the control module transmits the loop current of each calibration circuit to the controller so that the controller can calibrate the acquisition module.

[0037] In conjunction with the second aspect, in some implementations of the second aspect, the controller is further configured to transmit the first calibration coefficient and the second calibration coefficient to the control module; the control module is further configured to store the first calibration coefficient and the second calibration coefficient, wherein the first calibration coefficient is used to calibrate a first current, the first current being the charging current of the first battery cell, and the second calibration coefficient is used to calibrate a second current, the second current being the charging current of the second battery cell or the total charging current of the electronic device.

[0038] Based on the above scheme, the control module can more accurately determine the charging current of each cell according to the calibration coefficient, so as to determine the charging safety of each cell.

[0039] In conjunction with the second aspect, in some implementations of the second aspect, the first calibration circuit further includes a first transistor connected in series with the calibration power supply and the fifth resistor, the first transistor being used to control the first calibration circuit to be turned off or on; the second calibration circuit further includes a second transistor connected in series with the calibration power supply and the sixth resistor, the second transistor being used to control the second calibration circuit to be turned off or on; when the first transistor controls the first calibration circuit to be on and the second transistor controls the second calibration circuit to be off, the controller is specifically used to determine the first calibration coefficient based on the loop current of the first calibration circuit and the calibration current; when the first transistor controls the first calibration circuit to be off and the second transistor controls the second calibration circuit to be on, the controller is specifically used to determine the second calibration coefficient based on the loop current of the second calibration circuit and the calibration current.

[0040] Based on the above scheme, the calibration circuit can be turned on or off by controlling the transistor, so that the controller can calibrate the first acquisition module and the second acquisition module respectively.

[0041] In conjunction with the second aspect, in some implementations of the second aspect, the first calibration circuit further includes a seventh resistor connected in series with the calibration power supply, the fifth resistor, and the first transistor. The seventh resistor is used to adjust the loop current of the first calibration circuit. The second calibration circuit further includes an eighth resistor connected in series with the calibration power supply, the sixth resistor, and the second transistor. The eighth resistor is used to adjust the loop current of the second calibration circuit.

[0042] Based on the above scheme, a resistor can be set on the calibration circuit to adjust the loop current, so that the acquisition module can more accurately obtain the loop current of the calibration circuit.

[0043] Thirdly, a control method is provided, which can be applied to an electronic device including at least two battery cells connected in parallel, the at least two battery cells including a first battery cell and a second battery cell, the method including: determining the charging current of the first battery cell and the charging current of the second battery cell; controlling the total charging current of the electronic device based on the charging current of the first battery cell and / or the charging current of the second battery cell, the total charging current of the electronic device.

[0044] Based on the above scheme, the total charging current of the electronic device can be controlled according to the charging current of each battery cell in the electronic device, so as to ensure the charging safety of each battery cell.

[0045] In conjunction with the third aspect, in some implementations of the third aspect, determining the charging current of the first battery cell and the charging current of the second battery cell includes: obtaining the total charging current of at least two battery cells and the charging current of the first battery cell; and determining the charging current of the second battery cell based on the total charging current of the at least two battery cells and the charging current of the first battery cell.

[0046] It should be noted that if the battery module includes N cells (N is a positive integer greater than or equal to 2), the total charging current of the N cells and the charging current of the N-1 cells can be obtained to determine the charging current of all cells in the battery module.

[0047] For example, the charging current of each cell in the battery module can be determined based on the charging current of two cells and the charging current of one of the cells.

[0048] In conjunction with the third aspect, in some implementations of the third aspect, determining the charging current of the first battery cell and the charging current of the second battery cell includes: acquiring the charging current of the first battery cell and the charging current of the second battery cell.

[0049] It should be noted that if the battery module includes N cells (N is a positive integer greater than or equal to 2), the charging current of each of the N cells can be obtained separately.

[0050] In conjunction with the third aspect, in some implementations of the third aspect, controlling the total charging current of the electronic device based on the charging current of the first battery cell and / or the charging current of the second battery cell includes: reducing the total charging current of the electronic device when the charging current of the first battery cell is greater than a first current threshold and the charging current of the second battery cell is less than or equal to a second current threshold; or reducing the total charging current of the electronic device when the charging current of the first battery cell is less than or equal to the first current threshold and the charging current of the second battery cell is greater than the second current threshold; or reducing the total charging current when the charging current of the first battery cell is greater than the first current threshold and the charging current of the second battery cell is greater than the second current threshold.

[0051] It should be noted that the first current threshold is the current threshold of the first battery cell, which is also the safety threshold of the first battery cell, and the second current threshold is the current threshold of the second battery cell, which is also the safety threshold of the second battery cell. When the charging current of a battery cell exceeds the safety threshold, there is a safety hazard.

[0052] Based on the above scheme, when the charging current of any one of the multiple battery cells in an electronic device exceeds the safety threshold, the total charging current of the electronic device can be reduced to ensure the charging safety of each battery cell in the electronic device.

[0053] In conjunction with the third aspect, in some implementations of the third aspect, controlling the total charging current of the electronic device based on the charging current of the first battery cell and / or the charging current of the second battery cell includes: increasing the total charging current when the charging current of the first battery cell is less than a first current threshold and the charging current of the second battery cell is less than a second current threshold.

[0054] Based on the above scheme, when all the cells in the electronic device are at the safety threshold, the total charging current of the electronic device can be increased to improve charging efficiency.

[0055] Fourthly, a computer-readable storage medium is provided, wherein a computer program is stored therein, and when the computer program is run on a computer, the computer causes the computer to perform the method described in the third aspect and any possible implementation thereof.

[0056] Fifthly, a computer program product containing instructions is provided, which, when run on a computer, causes the computer to perform the method described in the third aspect above and any possible implementation thereof.

[0057] In a sixth aspect, a chip is provided, the chip including a processor and a data interface, the processor reading instructions stored in a memory through the data interface to execute the method described in the third aspect above and any possible implementation thereof. Attached Figure Description

[0058] Figure 1 is a schematic structural diagram of an electronic device.

[0059] Figure 2 is a schematic diagram of the internal space of an electronic device.

[0060] Figure 3 is a system architecture diagram provided in an embodiment of this application.

[0061] Figure 4 is a schematic diagram of an electronic device and calibration system provided in an embodiment of this application.

[0062] Figure 5 is a schematic diagram of an electronic device structure provided in an embodiment of this application.

[0063] Figure 6 is a schematic diagram of an electronic device structure provided in an embodiment of this application.

[0064] Figure 7 is a schematic flowchart of a control method provided in an embodiment of this application.

[0065] Figure 8 is a schematic diagram of a calibration system structure provided in an embodiment of this application.

[0066] Figure 9 is a schematic diagram of a calibration system structure provided in an embodiment of this application. Detailed Implementation

[0067] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0068] The terms "first," "second," etc., used in the specification, embodiments, claims, and drawings of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or order. Terms such as "connected," "linked," etc., are used to express communication or interaction between different components and may include being connected, directly connected, or indirectly connected through other components. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, such as including a series of steps or units. A method, system, product, or device is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0069] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0070] Figure 1 is a schematic structural diagram of an electronic device 100 provided in an embodiment of this application. The electronic device 100 can be, for example, a terminal consumer product or a 3C electronic product (computer, communication, consumer electronic product), such as a mobile phone, power bank, laptop, tablet computer, e-reader, laptop computer, digital camera, wearable device, vehicle terminal, headphones, etc. The electronic device 100 can also be a mobile device. A mobile device can be, for example, a vehicle, electric skateboard, electric bicycle, etc. The embodiment shown in Figure 1 uses a mobile phone as an example for illustration.

[0071] The electronic device 100 internally includes a battery 10 and other areas 20 besides the battery. The battery 10 can be, for example, a lithium-ion rechargeable battery, a sodium-ion rechargeable battery, a potassium-ion rechargeable battery, a magnesium-ion rechargeable battery, a zinc-ion rechargeable battery, or an aluminum-ion rechargeable battery. The battery 10 provides electrical energy to the electronic device 100. The battery 10 may include one or more battery cells. By maximizing the number and size of battery cells within the limited space of the battery 10, more electrical energy can be provided to the electronic device 100. On the other hand, the internal space of the electronic device 100 is limited. Arranging multiple battery cells within the battery 10 to occupy as little space as possible saves space in other areas 20, which can then house the motherboard of the electronic device 100.

[0072] For ease of understanding, the following diagram, in conjunction with Figure 2, illustrates the space occupied by the battery 10 and other areas 20.

[0073] Figure 2 shows a schematic diagram of the internal space of an electronic device provided in an embodiment of this application.

[0074] As shown in Figure 2(a), the electronic device includes a battery 10 and other areas 20. The battery 10 is a regular rectangle, and to save internal space, the other areas 20 (e.g., the motherboard) are distributed adjacent to the battery 10.

[0075] Under the premise that the battery 10 provides the same power, by optimizing the size and layout of the cells in the battery 10, the internal layout diagram of the electronic device shown in Figure 2(b) can be obtained.

[0076] As shown in Figure 2(b), the electronic device includes a battery 10 and other areas 20. The battery 10 has an irregular shape, which saves the area occupied by the shaded empty area 30 compared to Figure 2(a). This allows the other areas 20 to use the empty area 30 to arrange the motherboard or other hardware devices of the electronic device.

[0077] It should be noted that multiple battery cells can be arranged within the battery 10, and these cells can be connected in parallel. Furthermore, the sizes or capacities of the multiple cells can also differ. For example, as shown in Figure 2(c), the battery 10 includes a first region and a second region, where the first region is where battery cell 11 is located, and the second region is where battery cell 12 is located. Battery cell 11 and battery cell 12 have different sizes. Obviously, the size of battery cell 12 is smaller than that of battery cell 11. To save space in the battery 10, the shape of the battery 10 can be designed along the size boundaries of battery cell 11 and battery cell 12, without needing to be a regular rectangle. This saves space in the empty area 30 shown in Figure 2(b) for other hardware devices.

[0078] To power electronic devices, larger capacity batteries need to be placed within the limited space of the device. These batteries can then house multiple cells of different sizes and capacities. However, in reality, different cells have different internal resistance characteristics. This results in different charging currents for different cells when charging electronic devices. Furthermore, because different cells have different safety thresholds for charging current, cells with lower safety thresholds are more prone to overcurrent when charging electronic devices with a given total charging current.

[0079] Therefore, embodiments of this application provide an electronic device, a calibration system, and a control method that can arrange more battery cells in a limited space. Furthermore, when charging multiple parallel battery cells, the charging current of each battery cell can be detected separately to ensure that the maximum current is used to charge multiple battery cells within the safety threshold of each battery cell, thereby maximizing charging efficiency.

[0080] Figure 3 illustrates a system architecture diagram provided in an embodiment of this application. This system architecture may include a charging module, a control module, a data acquisition module, a calibration module, a battery module, and a discharging module.

[0081] Specifically, the charging module charges the battery module and, through the discharging module, supplies the electrical energy input from the charging module to the electronic device. The battery module can include multiple cells, for example, cell 1, cell 2, ..., cell N. These cells can be connected in parallel, and their sizes and capacities can differ. The presence of cells of different sizes or capacities means the battery module's shape doesn't have to be a regular rectangle. In other words, the shape of the electronic device's battery pack can vary depending on the number, size, and capacity of the internal cells, allowing the battery pack to flexibly adapt to the internal space of the electronic device while saving space for other hardware components.

[0082] When the charging module charges the battery module, the acquisition module can obtain the charging current of each cell within the battery module. The control module can then determine whether the charging current exceeds the safety threshold of each cell based on the acquired charging current, and control the total charging current provided by the charging module to the battery module accordingly. Furthermore, to ensure the control module can accurately determine whether the charging current of each cell exceeds the safety threshold, the charging current obtained by the acquisition module can be calibrated using a calibration module.

[0083] Optionally, before the electronic device leaves the factory, its system architecture may include the aforementioned charging module, control module, acquisition module, and calibration module. The acquisition module may include multiple fuel gauges for acquiring the charging current of different battery cells. The calibration module can calibrate the fuel gauges in the acquisition module to obtain calibration coefficients, ensuring high accuracy of the charging current of each battery cell subsequently acquired by the acquisition module.

[0084] Optionally, in scenarios where the user charges the electronic device after it leaves the factory, the system architecture of the electronic device may include the aforementioned charging module, control module, acquisition module, and battery module. While the charging module provides the total charging current to the battery module, the acquisition module acquires the charging current of each cell within the battery module. The control module determines whether the charging current of each cell is within a safe threshold. If it exceeds the safe threshold, it instructs the charging module to control the total charging current. This maximizes charging efficiency while ensuring charging safety. Furthermore, to further improve the accuracy of acquiring the charging current of each cell, the control module of the electronic device after leaving the factory can store calibration coefficients obtained through pre-shipment calibration. This allows for more accurate determination of whether to control the total charging current and more precise control of the total charging current based on the calibration coefficients.

[0085] The following will describe in detail, with reference to the accompanying drawings, an electronic device, a calibration system, and a control method provided in the embodiments of this application.

[0086] Figure 4 is a schematic diagram of an electronic device and calibration system provided in an embodiment of this application.

[0087] Figure 4(a) shows a schematic diagram of an electronic device. This diagram illustrates the structure of the electronic device after it leaves the factory. Through this electronic device, the charging current of each battery cell can be obtained, and charging safety can be ensured while maximizing charging efficiency based on the charging current of each battery cell.

[0088] The electronic device includes a charging module, a battery module, a data acquisition module, and a control module.

[0089] The charging module is connected to the first terminal (C terminal) of the battery module and is used to provide the total charging current to the battery module.

[0090] The battery module includes a first branch 41 and a second branch 42, which are connected in parallel. The first branch 41 includes a first cell Vcell 1 and a first resistor R1 connected in series, and the second branch 42 includes a second cell Vcell 2.

[0091] The acquisition module includes a first acquisition module and a second acquisition module. The first acquisition module is connected in parallel with the first resistor R1 to acquire a first current, which is the charging current of the first cell Vcell 1. The second acquisition module is used to acquire a second current.

[0092] The control module is connected to the charging module and is used to control the total charging current provided by the charging module according to the first current and the second current.

[0093] Optionally, the battery module also includes a second resistor R2. The first end (A end) of the first branch 41 and the first end (A end) of the second branch 42 are connected to the first end of the second resistor R2. The second end of the second resistor R2 is grounded. The second acquisition module is connected in parallel with the second resistor R2. The second current is the total charging current.

[0094] It is understood that the battery pack in an electronic device may include all or part of the components in the battery module, and this application does not limit this.

[0095] For example, the second resistor R2 can be inside the battery pack or outside the battery pack, connected externally to the battery pack.

[0096] It should be noted that the first resistor R1 and the second resistor R2 can be used as sampling resistors. The current through the first resistor R1 is the charging current of the first cell Vcell 1, and the current through the second resistor R2 is the total charging current of the battery module, including the charging current of the first cell Vcell 1 and the charging current of the second cell Vcell 2.

[0097] For example, the first acquisition module is a fuel gauge 1, and the second acquisition module is a fuel gauge 2. Fuel gauge 1 is connected in parallel with the first resistor R1 through the SRP pin and the SRN pin to obtain the current through the second resistor R1; fuel gauge 2 is connected in parallel with the second resistor R2 through the SRP pin and the SRN pin to obtain the current through the first resistor R2.

[0098] The control module is connected to the acquisition module to obtain the first current and the second current; the control module is specifically used to control the total charging current provided by the charging module according to the charging current of the first cell Vcell 1 and the charging current of the second cell Vcell 2.

[0099] For example, the control module is connected to fuel gauge 1 via an I2C0 interface and to fuel gauge 2 via an I2C1 interface. The control module determines the charging current of the first battery cell Vcell 1 based on the current obtained by fuel gauge 1, and determines the charging current of the second battery cell Vcell 2 based on the current obtained by fuel gauge 2 and fuel gauge 1. The control module stores the current threshold values ​​for the first battery cell Vcell 1 and the second battery cell Vcell 2. The current threshold value for the first battery cell Vcell 1 is its safety threshold, which can be understood as the maximum charging current value of the first battery cell Vcell 1; the current threshold value for the second battery cell Vcell 2 is its safety threshold, which can be understood as the maximum charging current value of the second battery cell Vcell 2. The control module can determine whether the charging current of the first battery cell Vcell 1 exceeds its safety threshold value, and whether the charging current of the second battery cell Vcell 2 exceeds its safety threshold value.

[0100] It should be noted that the control module determines whether the charging current of each cell in the battery module exceeds the safety threshold of each cell. This ensures the charging safety of each cell in the battery module while maximizing the total charging current of the battery module to improve charging efficiency.

[0101] When the control module determines that the charging current of the first cell Vcell 1 is greater than the first current threshold and the charging current of the second cell Vcell 2 is less than or equal to the second current threshold, the control module specifically controls the charging module to reduce the total charging current; when the control module determines that the charging current of the first cell Vcell 1 is less than or equal to the first current threshold and the charging current of the second cell Vcell 2 is greater than the second current threshold, the control module specifically controls the charging module to reduce the total charging current; when the control module determines that the charging current of the first cell Vcell 1 is greater than the first current threshold and the charging current of the second cell Vcell 2 is greater than the second current threshold, the control module specifically controls the charging module to reduce the total charging current.

[0102] For example, assuming a first current threshold of 7A and a second current threshold of 10A, the current charging current of the first cell Vcell 1 is 8A, and the charging current of the second cell Vcell 2 is 6A. The control module determines that the charging current of the first cell Vcell 1 is greater than the first current threshold, and the charging current of the second cell Vcell 2 is less than the second current threshold. At this time, the ratio of the actual charging current of the first cell Vcell 1 to the second cell Vcell 2 is 4 / 3 (8:6), and the total charging current is 14A (8A+6A). To ensure charging safety, the actual charging current of the first cell Vcell 1 needs to decrease to below the first current threshold of 7A. The control module can calculate, based on the ratio of the actual charging currents, that when the actual charging current of the first cell Vcell 1 is 7A, the actual charging current of the second cell Vcell 2 is 5.25A (6*7 / 8), and the total charging current is 12.25A (7A+5.25A). In other words, the control module can control the total charging current to decrease from 14A to 12.25A based on the ratio of the charging current of each cell.

[0103] When the control module determines that the charging current of the first cell Vcell 1 is less than the first current threshold and the charging current of the second cell Vcell 2 is less than the second current threshold, the control module is specifically used to control the charging module to increase the total charging current.

[0104] For example, assuming a first current threshold of 7A and a second current threshold of 10A, the current charging current of the first cell Vcell 1 is 6A, and the charging current of the second cell Vcell 2 is 8A. The control module determines that the charging current of the first cell Vcell 1 is less than the first current threshold, and the charging current of the second cell Vcell 2 is less than the second current threshold. At this time, the ratio of the actual charging current of the first cell Vcell 1 to the second cell Vcell 2 is 3 / 4 (6:8), and the total charging current is 14A (8A+6A). Since the charging current of the first cell Vcell 1 is closer to the first current threshold, to improve the charging current, the actual charging current of the second cell Vcell 2 needs to be increased by the benchmark that the actual charging current of the first cell Vcell 1 needs to be increased to the first current threshold of 7A. The control module calculates the actual charging current based on the ratio of the actual charging currents. When the actual charging current of the first cell (Vcell 1) is 7A, the actual charging current of the second cell (Vcell 2) is 9.3A (7*8 / 6). Therefore, the total charging current is 16.3A (7A+9.3A). In other words, the control module can control the total charging current to increase from 14A to 16.3A based on the ratio of the charging currents of each cell.

[0105] The first current threshold is the safety threshold of the first cell Vcell 1, and the second current threshold is the safety threshold of the second cell Vcell 2.

[0106] For example, the charging module is connected to the battery module to provide the total charging current, and at the same time, it is connected to the I2C2 interface of the control module so that the total charging current can be controlled under the control of the control module.

[0107] For example, when the control module determines that the charging current of the first cell Vcell 1 is greater than the safety threshold of the first cell Vcell 1, and / or the control module determines that the charging current of the second cell Vcell 2 is greater than the safety threshold of the second cell Vcell 2, the control module sends a control signal to the charging module to control the charging module to reduce the total charging current and ensure charging safety. If the control module determines that the charging current of the first cell Vcell 1 is less than the safety threshold of the first cell Vcell 1, and the charging current of the second cell Vcell 2 is also less than the safety threshold of the second cell Vcell 2, the control module sends a control signal to the charging module to control the charging module to increase the total charging current and improve charging efficiency.

[0108] The electronic device provided in this application includes a battery module with multiple cells connected in parallel, and a data acquisition module that can acquire the charging current of each cell. This allows for the arrangement of a larger capacity battery within the limited space inside the electronic device, while ensuring that each cell is charged with the maximum current within a safe threshold, thereby improving charging efficiency.

[0109] As can be seen, in the electronic device shown in Figure 4(a), the control module can control the total charging current based on the charging current of each individual cell. Furthermore, a calibration coefficient can be introduced, allowing the control module to more accurately control the total charging current provided by the charging module based on the calibration coefficient and the charging current of each individual cell. The calibration coefficient can typically be obtained by calibrating the acquisition module using a calibration system before the electronic device leaves the factory. Figure 4(b) below shows a schematic diagram of such a calibration system. Before the electronic device leaves the factory, the calibration coefficient can be obtained through this calibration system, enabling the electronic device shown in Figure 4(a) to more accurately control the total charging current based on the calibration coefficient.

[0110] The calibration system includes electronic equipment and a calibration module, the electronic equipment including a data acquisition module.

[0111] The acquisition module includes a first acquisition module and a second acquisition module. The calibration module includes a first calibration circuit 50 and a second calibration circuit 60. The first calibration circuit 50 includes a calibration power supply Vs connected in series with a fifth resistor R5. The second calibration circuit 60 includes a calibration power supply Vs connected in series with a sixth resistor R6. The second calibration circuit 60 is connected in parallel with the first calibration circuit 50. The calibration power supply Vs is used to provide calibration current. The first acquisition module is connected in parallel with the fifth resistor R5 to obtain the loop current of the first calibration circuit 50. The second acquisition module is connected in parallel with the sixth resistor R6 to obtain the loop current of the second calibration circuit 60.

[0112] It should be noted that the fifth resistor R5 and the sixth resistor R6 can be used as sampling resistors. The current through the fifth resistor R5 is the loop current of the first calibration circuit 50, and the current through the sixth resistor R6 is the loop current of the second calibration circuit 60.

[0113] For example, the first acquisition module is fuel gauge 1, and the second acquisition module is fuel gauge 2. Fuel gauge 1 is connected in parallel with the fifth resistor R5 through the SRP pin and the SRN pin to obtain the current through the fifth resistor R5; fuel gauge 2 is connected in parallel with the sixth resistor R6 through the SRP pin and the SRN pin to obtain the current through the sixth resistor R6.

[0114] The calibration module also includes a controller, which is used to determine a first calibration coefficient based on the loop current and calibration current of the first calibration circuit 50, and to determine a second calibration coefficient based on the loop current and calibration current of the second calibration circuit 50.

[0115] For example, the controller can be a personal computer (PC) controller, and the calibration current is provided by the calibration power supply Vs. The PC controller calibrates the loop current of the first calibration circuit 50 obtained by the fuel meter 1 according to the calibration current, determines the first calibration coefficient, and realizes the calibration of the fuel meter 1; it can also calibrate the loop current of the second calibration circuit 60 obtained by the fuel meter 2 according to the calibration current, determine the second calibration coefficient, and realize the calibration of the fuel meter 2.

[0116] The calibration system also includes a control module connected to the acquisition module, used to acquire the loop current of the first calibration circuit 50 and the loop current of the second calibration circuit 60. A controller is connected to the control module to acquire the return current of the first calibration circuit 50 and the loop current of the second calibration circuit 60 through the control module.

[0117] Optionally, the control module can obtain the calibration current through the controller and determine the first calibration coefficient based on the calibration current and the loop current of the first calibration circuit 50; and determine the second calibration coefficient based on the calibration current and the loop current of the second calibration circuit 60.

[0118] For example, the control module is connected to fuel meter 2 via an I2C0 interface, to fuel meter 1 via an I2C1 interface, and to the PC controller via an I2C3 interface. The control module transmits the current acquired by fuel meter 2 to the PC controller, and also transmits the current acquired by fuel meter 1 to the PC controller. The PC controller determines a second calibration coefficient based on the calibration current and the current acquired by fuel meter 2; and determines a first calibration coefficient based on the calibration current and the current acquired by fuel meter 1.

[0119] The controller is also used to transmit the first calibration coefficient and the second calibration coefficient to the control module; the control module is also used to store the first calibration coefficient and the second calibration coefficient. The first calibration coefficient can be used in the electronic device shown in Figure 4(a). The control module shown in Figure 4(a) stores the first calibration coefficient, and the control module can calibrate the charging current of the first battery cell Vcell 1 according to the first calibration coefficient. The second calibration coefficient can be used in the electronic device shown in Figure 4(a). The control module shown in Figure 4(a) stores the second calibration coefficient, and the control module can calibrate the charging current of the second battery cell Vcell 2 according to the second calibration coefficient.

[0120] For example, the controller obtains a calibration current of 5A, the first acquisition module obtains a loop current of 4A from the first calibration circuit, and the controller obtains the loop current of the first calibration circuit through the control module. The controller calculates a calibration coefficient of 1.25 (5A / 4A) based on the calibration current and the loop current of the first calibration circuit, and transmits the calculated calibration coefficient to the control module for storage. After the electronic device leaves the factory, the control module obtains a first current of 6A through the fuel gauge 1 shown in Figure 4(a). Based on the calibration coefficient of 1.25 calculated before leaving the factory, the control module determines a more accurate first current of 7.5A (6A*1.25). When the first current is the charging current of the first battery cell Vcell 1, the control module determines the charging current of the first battery cell Vcell 1 to be 7.5A.

[0121] It should be noted that the control module can more accurately determine the charging current of each cell based on the calibration coefficient, so as to ensure the charging safety of each cell.

[0122] Specifically, the first calibration circuit 50 further includes a first transistor Q1, which is connected in series with the calibration power supply Vs and the fifth resistor R5. The first transistor Q1 is used to control the first calibration circuit 50 to be turned on or off. The second calibration circuit 60 further includes a second transistor Q2, which is connected in series with the calibration power supply Vs and the sixth resistor R6. The second transistor Q2 is used to control the second calibration circuit 60 to be turned on or off. When the first transistor Q1 controls the first calibration circuit 50 to be turned on and the second transistor Q2 controls the second calibration circuit 60 to be turned off, the controller is specifically used to determine a first calibration coefficient based on the loop current and calibration current of the first calibration circuit 50. When the first transistor Q1 controls the first calibration circuit 50 to be turned off and the second transistor Q2 controls the second calibration circuit 60 to be turned on, the controller is specifically used to determine a second calibration coefficient based on the loop current and calibration current of the second calibration circuit 60.

[0123] It should be noted that the calibration circuit can be turned on or off by a transistor so that the PC controller can calibrate fuel gauge 1 and fuel gauge 2 respectively.

[0124] The first calibration circuit 50 also includes a seventh resistor R7, which is connected in series with the calibration power supply Vs, the fifth resistor R5, and the first transistor Q1. The seventh resistor R7 is used to adjust the loop current of the first calibration circuit 50.

[0125] The second calibration circuit also includes an eighth resistor R8, which is connected in series with the calibration power supply Vs, the sixth resistor R6, and the second transistor Q2. The eighth resistor R8 is used to adjust the loop current of the second calibration circuit 60.

[0126] The calibration system provided in this application includes a calibration module, which can calibrate the acquisition module used to obtain the charging current of the battery cells, so as to more accurately determine the charging current of each battery cell.

[0127] It should be noted that, in the schematic diagram of the electronic device structure shown in Figure 4(a), it is easy to see that in the acquisition module, the fuel gauge 1 can directly obtain the charging current of the first cell Vcell 1, the fuel gauge 2 obtains the total charging current of the battery module, and the charging current of the second cell Vcell 2 needs to be determined by the control module based on the total charging current of the battery module obtained by the fuel gauge 2 and the charging current of the first cell Vcell 1 obtained by the fuel gauge 1.

[0128] Furthermore, to facilitate the control module's control of the total charging current, as shown in Figure 5, which illustrates a schematic diagram of an electronic device provided in this application embodiment, the acquisition module in Figure 5 can directly acquire the charging current of the first cell Vcell 1 and the second cell Vcell 2, saving the control module the step of calculating the charging current of the other cell based on the total charging current and the charging current of one cell. This electronic device includes a charging module, a battery module, an acquisition module, and a control module.

[0129] The charging module is connected to the first terminal (C terminal) of the battery module and is used to provide the total charging current to the battery module.

[0130] The battery module includes a first branch 43 and a second branch 44, which are connected in parallel. The first branch 43 includes a first cell Vcell 1 and a first resistor R1 connected in series, and the second branch 44 includes a second cell Vcell 2.

[0131] The acquisition module includes a first acquisition module and a second acquisition module. The first acquisition module is connected in parallel with the first resistor R1 to acquire a first current, which is the charging current of the first cell Vcell 1. The second acquisition module is used to acquire a second current.

[0132] The control module is connected to the charging module and is used to control the total charging current provided by the charging module according to the first current and the second current.

[0133] Optionally, the second branch 44 also includes a third resistor R3 connected in series with the second cell Vcell 2, the second acquisition module is connected in parallel with the third resistor R3, and the second current is the charging current of the second cell Vcell 2.

[0134] It should be noted that the first resistor R1 and the third resistor R3 can be used as sampling resistors. The current through the first resistor R1 is the charging current of the first cell Vcell 1, and the current through the third resistor R3 is the charging current of the second cell Vcell 2.

[0135] For example, the first acquisition module is a fuel gauge 1, and the second acquisition module is a fuel gauge 2. Fuel gauge 1 is connected in parallel with a first resistor R1 through its SRP and SRN pins to acquire the current passing through the second resistor R1; fuel gauge 2 is connected in parallel with a third resistor R3 through its SRP and SRN pins to acquire the current passing through the third resistor R3.

[0136] The control module is connected to the acquisition module to obtain the first current and the second current; the control module is specifically used to control the total charging current provided by the charging module according to the charging current of the first cell Vcell 1 and the charging current of the second cell Vcell 2.

[0137] For example, the control module is connected to fuel gauge 1 via an I2C0 interface and to fuel gauge 2 via an I2C1 interface. The control module determines the current obtained by fuel gauge 1 as the charging current of the first battery cell Vcell 1, and determines the current obtained by fuel gauge 2 as the charging current of the second battery cell Vcell 2. The control module stores the current threshold values ​​for the first battery cell Vcell 1 and the second battery cell Vcell 2. The current threshold value for the first battery cell Vcell 1 is its safety threshold, which can be understood as the maximum charging current value of the first battery cell Vcell 1; the current threshold value for the second battery cell Vcell 2 is its safety threshold, which can be understood as the maximum charging current value of the second battery cell Vcell 2. The control module can determine whether the charging current of the first battery cell Vcell 1 exceeds its safety threshold value, and whether the charging current of the second battery cell Vcell 2 exceeds its safety threshold value.

[0138] It should be noted that the control module determines whether the charging current of each cell in the battery module exceeds the safety threshold of each cell. This ensures the charging safety of each cell in the battery module while maximizing the total charging current of the battery module to improve charging efficiency.

[0139] When the control module determines that the charging current of the first cell Vcell 1 is greater than the first current threshold and the charging current of the second cell Vcell 2 is less than or equal to the second current threshold, the control module specifically controls the charging module to reduce the total charging current; when the control module determines that the charging current of the first cell Vcell 1 is less than or equal to the first current threshold and the charging current of the second cell Vcell 2 is greater than the second current threshold, the control module specifically controls the charging module to reduce the total charging current; when the control module determines that the charging current of the first cell Vcell 1 is greater than the first current threshold and the charging current of the second cell Vcell 2 is greater than the second current threshold, the control module specifically controls the charging module to reduce the total charging current.

[0140] It should be noted that the specific methods by which the control module reduces the total charging current are as described above, and will not be repeated here to avoid redundancy.

[0141] When the control module determines that the charging current of the first cell Vcell is less than the first current threshold and the charging current of the second cell Vcell 2 is less than the second current threshold, the control module is specifically used to control the charging module to increase the total charging current.

[0142] It should be noted that the specific method by which the control module increases the total charging current is as described above, and will not be repeated here to avoid redundancy.

[0143] The first current threshold is the safety threshold of the first cell Vcell 1, and the second current threshold is the safety threshold of the second cell Vcell 2.

[0144] For example, the charging module is connected to the battery module to provide the total charging current, and at the same time, it is connected to the I2C2 interface of the control module so that the total charging current can be controlled under the control of the control module.

[0145] It should be noted that in the schematic diagrams of the electronic device shown in Figure 4(a) and Figure 5, two battery cells are connected in parallel in the battery module. This application does not limit the number of parallel battery cells in the battery module; more cells can be arranged in the battery module according to the actual internal space of the electronic device and the actual capacity requirements. Below, we will introduce the structure of an electronic device using three parallel battery cells as an example.

[0146] Figure 6 shows a schematic diagram of an electronic device structure provided in an embodiment of this application. The battery module in Figure 6 includes three battery cells connected in parallel. The electronic device includes a charging module, a battery module, a data acquisition module, and a control module.

[0147] The charging module is connected to the first terminal (C terminal) of the battery module and is used to provide the total charging current to the battery module.

[0148] The battery module includes a first branch 46, a second branch 47, and at least one third branch 45, which are connected in parallel. The first branch 46 includes a first cell Vcell 1 and a first resistor R1 connected in series. The second branch 47 includes a second cell Vcell 2. Each of the at least one third branch 45 includes a third cell Vcell 3 and a fourth resistor R4 connected in series.

[0149] The acquisition module includes a first acquisition module, a second acquisition module, and a third acquisition module. The first acquisition module is connected in parallel with a first resistor R1 to acquire a first current, which is the charging current of the first cell Vcell 1. The second acquisition module is used to acquire a second current. The third acquisition module is connected in parallel with a fourth resistor R4 to acquire a third current, which is the charging current of the third cell Vcell 3.

[0150] The control module is connected to the charging module and is used to control the total charging current provided by the charging module according to the first current, the second current and the third current.

[0151] Optionally, the battery module also includes a second resistor R2. The first end (A end) of the first branch 46, the first end (A end) of the second branch 47 and the first end (A end) of at least one third branch 45 are connected to the first end of the second resistor R2. The second end of the second resistor R2 is grounded. The second acquisition module is connected in parallel with the second resistor R2. The second current is the total charging current.

[0152] It should be noted that the first resistor R1, the second resistor R2, and the fourth resistor R4 can be used as data acquisition resistors. The current through the first resistor R1 is the charging current of the first cell Vcell 1, the current through the second resistor R2 is the total charging current of the battery module, and the current through the fourth resistor R4 is the charging current of the third cell Vcell 3.

[0153] For example, the first acquisition module is fuel gauge 1, the second acquisition module is fuel gauge 2, and the third acquisition module is fuel gauge 3. Fuel gauge 1 is connected in parallel with the second resistor R1 through its SRP and SRN pins to acquire the current flowing through the first resistor R1; fuel gauge 2 is connected in parallel with the second resistor R2 through its SRP and SRN pins to acquire the current flowing through the second resistor R2; and fuel gauge 3 is connected in parallel with the fourth resistor R4 through its SRP and SRN pins to acquire the current flowing through the fourth resistor R4.

[0154] The control module is connected to the acquisition module to obtain the first current and the second current; the control module is specifically used to control the total charging current provided by the charging module according to the charging current of the first cell Vcell 1, the charging current of the second cell Vcell 2 and the charging current of the third cell Vcell 3.

[0155] For example, the control module is connected to fuel gauge 1 via an I2C0 interface, to fuel gauge 2 via an I2C1 interface, and to fuel gauge 3 via an I2C4 interface. The control module determines the current obtained by fuel gauge 1 as the charging current of the first battery cell Vcell 1, and the current obtained by fuel gauge 3 as the charging current of the third battery cell Vcell 3. Furthermore, it determines the charging current of the second battery cell Vcell 2 based on the currents obtained by fuel gauge 2, fuel gauge 1, and fuel gauge 3. The control module stores the current threshold values ​​for the first battery cell Vcell 1, the second battery cell Vcell 2, and the third battery cell Vcell 3. Specifically, the current threshold of the first cell Vcell 1 is its safety threshold, which can be understood as the maximum charging current value of the first cell Vcell 1; the current threshold of the second cell Vcell 2 is its safety threshold, which can be understood as the maximum charging current value of the second cell Vcell 2; and the current threshold of the third cell Vcell 3 is its safety threshold, which can be understood as the maximum charging current value of the third cell Vcell 3. The control module can determine whether the charging current of the first cell Vcell 1 exceeds its safety threshold, whether the charging current of the second cell Vcell 2 exceeds its safety threshold, and whether the charging current of the third cell Vcell 3 exceeds its safety threshold.

[0156] It should be noted that the control module determines whether the charging current of each cell in the battery module exceeds the safety threshold of each cell. This ensures the charging safety of each cell in the battery module while maximizing the total charging current of the battery module to improve charging efficiency.

[0157] When the control module determines that the charging current of the first cell Vcell 1 is greater than the first current threshold, the control module is specifically used to control the charging module to reduce the total charging current; and / or when the control module determines that the charging current of the second cell Vcell 2 is greater than the second current threshold, the control module is specifically used to control the charging module to reduce the total charging current; and / or when the control module determines that the charging current of the third cell Vcell 3 is greater than the third current threshold, the control module is specifically used to control the charging module to reduce the total charging current.

[0158] It should be noted that the specific methods by which the control module reduces the total charging current are as described above, and will not be repeated here to avoid redundancy.

[0159] When the control module determines that the charging current of the first cell Vcell 1 is less than the first current threshold, the charging current of the second cell Vcell 2 is less than the second current threshold, and the charging current of the third cell Vcell 3 is less than the third current threshold, the control module is specifically used to control the charging module to increase the total charging current.

[0160] It should be noted that the specific method by which the control module increases the total charging current is as described above, and will not be repeated here to avoid redundancy.

[0161] The first current threshold is the safety threshold of the first cell Vcell 1, the second current threshold is the safety threshold of the second cell Vcell 2, and the third current threshold is the safety threshold of the third cell Vcell 3.

[0162] For example, the charging module is connected to the battery module to provide the total charging current, and at the same time, it is connected to the I2C2 interface of the control module so that the total charging current can be controlled under the control of the control module.

[0163] It is easy to see that the electronic device shown in Figure 6 is based on the electronic device shown in Figure 4(a), with the addition of a third battery cell. The fuel gauge 3 in the acquisition module can directly acquire the charging current of the third battery cell. It can be understood that when the battery module includes N (N is a positive integer greater than or equal to 2) parallel-connected battery cells, by acquiring the total charging current of the N cells and the charging current of each of the N-1 cells, the charging current of each individual cell in the battery module can be determined.

[0164] Of course, in the electronic device shown in Figure 5, the number of parallel battery cells can also be increased. Correspondingly, the number of fuel gauges in the acquisition module can be increased, so that each fuel gauge in the acquisition module can directly obtain the charging current of each battery cell.

[0165] As shown in FIG7, for an electronic device based on the above structure, this application provides a schematic flowchart of a control method. The control method 700 can be applied to the electronic device described above. It can improve charging efficiency while ensuring the charging safety of each cell in the battery module. The following describes the method 700 in detail, taking the electronic device shown in FIG4(a) or FIG5 as examples.

[0166] S701, determine the charging current of the first battery cell and the charging current of the second battery cell.

[0167] Optionally, when the electronic device has the structure shown in Figure 4(a), the total charging current of at least two cells and the charging current of the first cell are first obtained, and then the charging current of the second cell is determined based on the total charging current of at least two cells and the charging current of the first cell.

[0168] Optionally, when the electronic device has the structure shown in Figure 5, the charging current of the first battery cell and the charging current of the second battery cell can be directly obtained.

[0169] It should be noted that the control module in the electronic device is used to determine the charging current of the first battery cell and the charging current of the second battery cell.

[0170] For example, the charging current of each cell in the battery module can be determined based on the charging current of two cells and the charging current of one of the cells.

[0171] It should be noted that if the battery module includes N cells (N is a positive integer greater than 0), the total charging current of the N cells and the charging current of the N-1 cells can be obtained to determine the charging current of all cells in the battery module.

[0172] To more accurately determine the charging current of each battery cell, the control module stores calibration coefficients. The control module can calibrate the charging current of each battery cell based on the charging current of each battery cell obtained from the acquisition module and the corresponding calibration coefficients.

[0173] It should be noted that the control module can control the total charging current of the electronic device based on the charging current of the first battery cell and / or the charging current of the second battery cell. The total charging current of the electronic device can be understood as the total charging current provided by the charging module to the battery module.

[0174] In other words, the control module determines the charging current of each cell in the battery module and needs to determine whether the charging current of each cell is within the safety threshold. If the charging current of any cell exceeds the safety threshold, the total charging current needs to be controlled.

[0175] For example, the following steps can be followed to determine whether the charging current of each battery cell is within the safe threshold.

[0176] S702, determine whether the charging current of the first cell is greater than the first current threshold.

[0177] For example, when the control module determines that the charging current of the first battery cell is greater than the first current threshold, it means that the charging current of the first battery cell exceeds the safety threshold of the first battery cell. Under the control of the control module, the charging module will execute the following step S705.

[0178] For example, when the control module determines that the charging current of the first battery cell is less than or equal to the first current threshold, it means that the charging current of the first battery cell is within the safety threshold of the first battery cell. The control module can then continue to execute the following step S704 to determine whether the charging current of the second battery cell is within the safety threshold.

[0179] S703, determine whether the charging current of the second cell is greater than the second current threshold.

[0180] For example, when the control module determines that the charging current of the second battery cell is greater than the second current threshold, it means that the charging current of the second battery cell exceeds the safety threshold of the second battery cell. Under the control of the control module, the charging module will execute the following step S705.

[0181] For example, when the control module determines that the charging current of the first battery cell is less than or equal to the first current threshold, and the control module determines that the charging current of the second battery cell is less than or equal to the second current threshold, it means that the charging current of the first battery cell is within the safety threshold of the first battery cell, and the charging current of the second battery cell is within the safety threshold of the second battery cell. In this case, the control module does not need to control the charging module to reduce the total charging current of the electronic device.

[0182] S704 reduces the total charging current of electronic devices.

[0183] For example, when the charging current of the first battery cell is greater than the first current threshold and the charging current of the second battery cell is less than or equal to the second current threshold, the total charging current of the electronic device is reduced; when the charging current of the first battery cell is less than or equal to the first current threshold and the charging current of the second battery cell is greater than the second current threshold, the total charging current of the electronic device is reduced; when the charging current of the first battery cell is greater than the first current threshold and the charging current of the second battery cell is greater than the second current threshold, the total charging current of the electronic device is reduced.

[0184] In one implementation, when the charging current of the first battery cell is less than a first current threshold and the charging current of the second battery cell is less than a second current threshold, the total charging current is increased.

[0185] It should be noted that the total charging current of electronic devices can be controlled based on the ratio of the current charging current of each cell.

[0186] For example, assuming a first current threshold of 7A and a second current threshold of 10A, the current charging current of the first cell Vcell 1 is 8A, and the charging current of the second cell Vcell 2 is 6A. The control module determines that the charging current of the first cell Vcell 1 is greater than the first current threshold, and the charging current of the second cell Vcell 2 is less than the second current threshold. At this time, the ratio of the actual charging current of the first cell Vcell 1 to the second cell Vcell 2 is 4 / 3 (8:6), and the total charging current is 14A (8A+6A). To ensure charging safety, the actual charging current of the first cell Vcell 1 needs to decrease to below the first current threshold of 7A. The control module can calculate, based on the ratio of the actual charging currents, that when the actual charging current of the first cell Vcell 1 is 7A, the actual charging current of the second cell Vcell 2 is 5.25A (6*7 / 8), and the total charging current is 12.25A (7A+5.25A). In other words, the control module can control the total charging current to decrease from 14A to 12.25A based on the ratio of the charging current of each cell.

[0187] For example, suppose the first current threshold is 7A and the second current threshold is 10A. Currently, the charging current of the first cell Vcell 1 is 6A, and the charging current of the second cell Vcell 2 is 8A. The control module determines that the charging current of the first cell Vcell 1 is less than the first current threshold, and the charging current of the second cell Vcell 2 is less than the second current threshold. At this point, the ratio of the actual charging current of the first cell Vcell 1 to the second cell Vcell 2 is 3 / 4 (6:8), and the total charging current is 14A (8A + 6A). Since the charging current of the first cell Vcell 1 is closer to the first current threshold, to improve the charging current, the actual charging current of the second cell Vcell 2 needs to be increased by the benchmark that the actual charging current of the first cell Vcell 1 needs to be increased to the first current threshold of 7A. The control module calculates the actual charging current based on the ratio of the actual charging currents. When the actual charging current of the first cell (Vcell 1) is 7A, the actual charging current of the second cell (Vcell 2) is 9.3A (7*8 / 6). Therefore, the total charging current is 16.3A (7A+9.3A). In other words, the control module can control the total charging current to increase from 14A to 16.3A based on the ratio of the charging currents of each cell.

[0188] Based on the above scheme, by obtaining the charging current of each cell in the electronic device and determining whether the charging current of each cell is within the safe threshold, the charging safety of each cell can be guaranteed.

[0189] It should be noted that, to enable the aforementioned electronic devices to more accurately determine whether the charging current of each battery cell is within the safe threshold, a calibration coefficient can be introduced. The electronic devices can use this calibration coefficient to more accurately determine the charging current of each battery cell, thereby more accurately controlling the total charging current.

[0190] The calibration system shown in Figure 4(b) can be used to calibrate the current acquired by the acquisition module. As described above, the calibration system can include a first calibration circuit 50 and a second calibration circuit 60. The first calibration circuit 50 includes a first transistor Q1, which controls the first calibration circuit 50 to open or close. The second calibration circuit 60 includes a second transistor Q2, which controls the second calibration circuit 60 to open or close. The PC controller can calibrate the charging current acquired by the first and second acquisition modules respectively. The two calibration modes of the calibration system will be described below with reference to Figures 8 and 9.

[0191] Figure 8 shows a schematic diagram of a calibration system provided in an embodiment of this application. The first calibration circuit 50 of the calibration system is turned on, which can calibrate the current acquired by the first acquisition module (fuel meter 1). The calibration system corresponds to the calibration mode of calibrating the first acquisition module (fuel meter 1), and includes an acquisition module and a calibration module.

[0192] The acquisition module includes a first acquisition module (fuel meter 1). The calibration module includes a first calibration circuit 50, which is used to calibrate the first acquisition module. The first calibration circuit 50 includes a calibration power supply Vs and a fifth resistor R5 connected in series. The calibration power supply Vs is used to provide calibration current. The first acquisition module and the fifth resistor R5 are connected in parallel to obtain the loop current of the first calibration circuit 50.

[0193] It should be noted that the fifth resistor R5 can be a sampling resistor. The current through the fifth resistor R5 is the loop current of the first calibration circuit 50.

[0194] For example, fuel gauge 1 is connected in parallel with the fifth resistor R5 via the SRP pin and the SRN pin to obtain the current through the fifth resistor R5.

[0195] The calibration module also includes a controller, which is used to determine a first calibration coefficient based on the loop current and calibration current of the first calibration circuit 50.

[0196] For example, the controller can be a PC controller, and the calibration current is provided by the calibration power supply Vs. The PC controller calibrates the loop current of the first calibration circuit 50 obtained by the fuel meter 1 according to the calibration current, determines the first calibration coefficient, and realizes the calibration of the fuel meter 1.

[0197] The calibration system also includes a control module connected to the first acquisition module for acquiring the return current of the first calibration circuit 50. A controller is connected to the control module to acquire the loop current of the first calibration circuit 50.

[0198] For example, the control module is connected to the fuel gauge 1 via an I2C1 interface and to the PC controller via an I2C3 interface. The control module transmits the current acquired by the fuel gauge 1 to the PC controller, and the PC controller determines the first calibration system number based on the calibration current and the current acquired by the fuel gauge 1.

[0199] The controller is also used to transmit the first calibration coefficient to the control module; the control module is also used to store the first calibration coefficient.

[0200] The first calibration circuit 50 also includes a first transistor Q1, which is connected in series with the calibration power supply Vs and the fifth resistor R5. The first transistor Q1 is used to control the first calibration circuit 50 to be turned on or off. When the first transistor Q1 controls the first calibration circuit 50 to be turned on, the controller is specifically used to determine the first calibration coefficient based on the loop current and the calibration current of the first calibration circuit 50.

[0201] The first calibration circuit 50 also includes a seventh resistor R7, which is connected in series with the calibration power supply Vs, the fifth resistor R5, and the first transistor Q1. The seventh resistor R7 is used to adjust the loop current of the first calibration circuit 50.

[0202] Figure 9 shows a schematic diagram of a calibration system provided in an embodiment of this application. The second calibration circuit 60 of this calibration system is turned on, enabling calibration of the current acquired by the second acquisition module (fuel meter 2). This calibration system corresponds to the calibration mode for calibrating the second acquisition module (fuel meter 2), and includes an acquisition module and a calibration module.

[0203] The acquisition module includes a second acquisition module (fuel meter 2). The calibration module includes a second calibration circuit 60, which is used to calibrate the second acquisition module. The second calibration circuit 60 includes a calibration power supply Vs connected in series with a sixth resistor R6. The calibration power supply Vs is used to provide calibration current. The second acquisition module is connected in parallel with the sixth resistor R6 to obtain the loop current of the second calibration circuit 60.

[0204] It should be noted that the sixth resistor R6 can be a sampling resistor. The current through the sixth resistor R6 is the loop current of the second calibration circuit 60.

[0205] For example, fuel gauge 2 is connected in parallel with the sixth resistor R6 via the SRP pin and the SRN pin to obtain the current through the sixth resistor R6.

[0206] The calibration module also includes a controller, which is used to determine the second calibration coefficient based on the loop current and calibration current of the second calibration circuit 60.

[0207] For example, the controller can be a PC controller, and the calibration current is provided by the calibration power supply Vs. The PC controller calibrates the loop current of the second calibration circuit 60 obtained by the fuel gauge 2 according to the calibration current, determines the second calibration coefficient, and realizes the calibration of the fuel gauge 2.

[0208] The calibration system also includes a control module connected to the second acquisition module for acquiring the loop current of the second calibration circuit 60. A controller is connected to the control module to acquire the loop current of the second calibration circuit 60 via the control module.

[0209] For example, the control module is connected to the fuel gauge 2 via an I2C0 interface and to the PC controller via an I2C3 interface. The control module transmits the current acquired by the fuel gauge 2 to the PC controller, and the PC controller determines a second calibration coefficient based on the calibration current and the current acquired by the fuel gauge 2.

[0210] The controller is also used to transmit the second calibration coefficient to the control module; the control module is also used to store the second calibration coefficient.

[0211] The second calibration circuit 60 also includes a second transistor Q2, which is connected in series with the calibration power supply Vs and the sixth resistor R6. The second transistor Q2 is used to control the second calibration circuit to be turned on or off. When the second transistor Q2 controls the second calibration circuit 60 to be turned on, the controller is specifically used to determine the second calibration coefficient based on the loop current and calibration current of the second calibration circuit 60.

[0212] The second calibration circuit 60 also includes an eighth resistor R8, which is connected in series with the calibration power supply Vs, the sixth resistor R6, and the second transistor Q2. The eighth resistor R8 is used to adjust the loop current of the second calibration circuit 60.

[0213] Based on the above scheme, this application provides a calibration system that can calibrate the modules in the acquisition module used to obtain the charging current of each cell, so as to more accurately determine whether the charging current of each cell is within the safe threshold.

[0214] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electronic device, characterized in that, include: A charging module is connected to the first end of the battery module and is used to provide the battery module with a total charging current. The battery module includes a first branch and a second branch, which are connected in parallel. The first branch includes a first battery cell and a first resistor connected in series, and the second branch includes a second battery cell. The acquisition module includes a first acquisition module and a second acquisition module. The first acquisition module is connected in parallel with the first resistor to acquire a first current, which is the charging current of the first battery cell. The second acquisition module is used to acquire a second current, which is the charging current of the second battery cell or the total charging current. The control module is connected to the charging module and is used to control the total charging current provided by the charging module according to the first current and the second current.

2. The electronic device according to claim 1, characterized in that, The battery module further includes a second resistor. The first end of the first branch and the first end of the second branch are both connected to the first end of the second resistor. The second end of the second resistor is grounded. The second acquisition module is connected in parallel with the second resistor. The second current is the total charging current.

3. The electronic device according to claim 1, characterized in that, The second branch also includes a third resistor connected in series with the second battery cell, the second acquisition module is connected in parallel with the third resistor, and the second current is the charging current of the second battery cell.

4. The electronic device according to any one of claims 1 to 3, characterized in that, The control module is connected to the acquisition module to acquire the first current and the second current; The control module is specifically used to control the total charging current provided by the charging module based on the charging current of the first battery cell and the charging current of the second battery cell.

5. The electronic device according to any one of claims 1 to 4, characterized in that, When the control module determines that the charging current of the first battery cell is greater than the first current threshold and the charging current of the second battery cell is less than or equal to the second current threshold, the control module is specifically used to control the charging module to reduce the total charging current. When the control module determines that the charging current of the first battery cell is less than or equal to the first current threshold and the charging current of the second battery cell is greater than the second current threshold, the control module is specifically used to control the charging module to reduce the total charging current. When the control module determines that the charging current of the first battery cell is greater than the first current threshold and the charging current of the second battery cell is greater than the second current threshold, the control module is specifically used to control the charging module to reduce the total charging current.

6. The electronic device according to any one of claims 1 to 5, characterized in that, When the control module determines that the charging current of the first battery cell is less than the first current threshold and the charging current of the second battery cell is less than the second current threshold, the control module is specifically used to control the charging module to increase the total charging current.

7. The electronic device according to claim 2, characterized in that, The battery module further includes at least one third branch, each of the at least one third branch including a third cell and a fourth resistor connected in series, the third branch being connected in parallel with the first branch and in parallel with the second branch; The acquisition module also includes a third acquisition module, which is connected in parallel with the fourth resistor to acquire a third current, which is the charging current of the third battery cell. The control module is used to control the total charging current provided by the charging module according to the first current, the second current and the third current.

8. The electronic device according to claim 7, characterized in that, The control module is connected to the acquisition module to acquire the first current, the second current and the third current; The control module is specifically used to control the total charging current provided by the charging module based on the charging current of the first battery cell, the charging current of the second battery cell, and the charging current of the third battery cell.

9. The electronic device according to any one of claims 1 to 8, characterized in that, The battery module includes a first region and a second region. The first region is used to house the first battery cell, and the second region is used to house the second battery cell. The size of the first battery cell and the size of the second battery cell are different to form a free area in the electronic device.

10. A calibration system, characterized in that, include: An electronic device, the electronic device including a data acquisition module, the data acquisition module including a first data acquisition module and a second data acquisition module; The calibration module includes a first calibration circuit and a second calibration circuit. The first calibration circuit includes a calibration power supply and a fifth resistor connected in series. The second calibration circuit includes the calibration power supply and a sixth resistor connected in series. The second calibration circuit and the first calibration circuit are connected in parallel. The calibration power supply is used to provide calibration current. The first acquisition module is connected in parallel with the fifth resistor to obtain the loop current of the first calibration circuit, and the second acquisition module is connected in parallel with the sixth resistor to obtain the loop current of the second calibration circuit.

11. The calibration system according to claim 10, characterized in that, The calibration module further includes a controller, which is configured to determine a first calibration coefficient based on the loop current of the first calibration circuit and the calibration current, and to determine a second calibration coefficient based on the loop current of the second calibration circuit and the calibration current.

12. The calibration system according to claim 11, characterized in that, The calibration system also includes: A control module, which is connected to the acquisition module, is used to acquire the loop current of the first calibration circuit and the loop current of the second calibration circuit. The controller is connected to the control module to obtain the loop current of the first calibration circuit and the loop current of the second calibration circuit through the control module.

13. The calibration system according to claim 12, characterized in that, The controller is further configured to transmit the first calibration coefficient and the second calibration coefficient to the control module; The control module is further configured to store the first calibration coefficient and the second calibration coefficient, wherein the first calibration coefficient is used to calibrate the first current, which is the charging current of the first battery cell, and the second calibration coefficient is used to calibrate the second current, which is the charging current of the second battery cell or the total charging current of the electronic device.

14. The calibration system according to any one of claims 11 to 13, characterized in that, The first calibration circuit further includes a first transistor, which is connected in series with the calibration power supply and the fifth resistor. The first transistor is used to control the first calibration circuit to be turned off or on. The second calibration circuit further includes a second transistor, which is connected in series with the calibration power supply and the sixth resistor. The second transistor is used to control the second calibration circuit to be turned off or on. When the first transistor controls the first calibration circuit to be turned on, and the second transistor controls the second calibration circuit to be turned off, the controller is specifically used to determine the first calibration coefficient based on the loop current of the first calibration circuit and the calibration current. When the first transistor controls the first calibration circuit to disconnect and the second transistor controls the second calibration circuit to turn on, the controller is specifically used to determine the second calibration coefficient based on the loop current of the second calibration circuit and the calibration current.

15. The calibration system according to claim 14, characterized in that, The first calibration circuit further includes a seventh resistor, which is connected in series with the calibration power supply, the fifth resistor, and the first transistor. The seventh resistor is used to adjust the loop current of the first calibration circuit. The second calibration circuit further includes an eighth resistor, which is connected in series with the calibration power supply, the sixth resistor, and the second transistor. The eighth resistor is used to adjust the loop current of the second calibration circuit.

16. A control method, characterized in that, The method is applied to an electronic device, the electronic device comprising at least two battery cells connected in parallel, the at least two battery cells comprising a first battery cell and a second battery cell, the method comprising: Determine the charging current of the first battery cell and the charging current of the second battery cell; The total charging current of the electronic device is controlled based on the charging current of the first battery cell and / or the charging current of the second battery cell.

17. The method according to claim 16, characterized in that, Determining the charging current of the first battery cell and the charging current of the second battery cell includes: Obtain the total charging current of at least two battery cells and the charging current of the first battery cell; The charging current of the second cell is determined based on the total charging current of the at least two cells and the charging current of the first cell.

18. The method according to claim 16, characterized in that, Determining the charging current of the first battery cell and the charging current of the second battery cell includes: Obtain the charging current of the first battery cell and the charging current of the second battery cell.

19. The method according to any one of claims 16 to 18, characterized in that, The step of controlling the total charging current of the electronic device based on the charging current of the first battery cell and / or the charging current of the second battery cell includes: When the charging current of the first battery cell is greater than the first current threshold, the charging current of the second battery cell is less than or equal to the second current threshold, thereby reducing the total charging current of the electronic device. When the charging current of the first battery cell is less than or equal to the first current threshold, and the charging current of the second battery cell is greater than the second current threshold, the total charging current of the electronic device is reduced. When the charging current of the first battery cell is greater than the first current threshold and the charging current of the second battery cell is greater than the second current threshold, the total charging current is reduced.

20. The method according to any one of claims 16 to 19, characterized in that, The step of controlling the total charging current of the electronic device based on the charging current of the first battery cell and / or the charging current of the second battery cell includes: When the charging current of the first battery cell is less than the first current threshold and the charging current of the second battery cell is less than the second current threshold, the total charging current is increased.

21. A computer-readable storage medium, characterized in that, It stores a computer program thereon, which, when executed by a computer, causes the computer to perform the method as described in any one of claims 16 to 20.

22. A computer program product containing instructions, characterized in that, When the computer program product is run on a computer, it causes the computer to perform the method as described in any one of claims 16 to 20.

23. A chip, characterized in that, The chip includes a processor and a data interface, wherein the processor reads instructions stored in a memory through the data interface to execute the method as described in any one of claims 16 to 20.

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