CN112684353A - Method for controlling current transmission state of battery module and calibrating battery capacity - Google Patents
Method for controlling current transmission state of battery module and calibrating battery capacity Download PDFInfo
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- CN112684353A CN112684353A CN201910987139.2A CN201910987139A CN112684353A CN 112684353 A CN112684353 A CN 112684353A CN 201910987139 A CN201910987139 A CN 201910987139A CN 112684353 A CN112684353 A CN 112684353A
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Abstract
A method for controlling a current transfer state of a battery module and calibrating a battery capacity, the method for controlling the current transfer state of the battery module comprising: reading a design battery capacity of a battery module from a battery fuel gauge, calculating an expected charge-discharge current according to the design battery capacity and a charge-discharge efficiency specified by the battery module, causing the battery module to discharge, and monitoring a discharge state of the battery module during a discharge process of the battery module. By using the method for controlling the current transmission state and calibrating the battery capacity of the battery module, a discharge program for providing constant current based on the battery capacity and the charge-discharge efficiency can be designed.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to a method for calibrating battery capacity, and more particularly, to an electronic device, a method for controlling a current transmission state of a battery module, and a method for calibrating battery capacity of a battery module.
[ background of the invention ]
The development of science and technology is changing day by day, and environmental awareness and energy saving become mainstream demands. Among various electronic devices that are popular in the society today, electronic devices that use a battery cell having a function of recharging as a main power source are becoming popular and are not popular in the market, as compared with primary batteries that are used in a conventional manner.
The rechargeable battery cell may be recharged and reused after being discharged. Generally, a battery cell is composed of five parts, i.e., a positive electrode, a negative electrode, an electrolyte, a separator and a container, and charge and discharge operations of the battery cell are performed based on an electrochemical redox reaction.
However, as the usage time increases or the rechargeable battery unit is not used for a while, the rechargeable battery unit may be subject to aging of the battery due to factors such as time and ambient temperature, and the battery capacity thereof may decrease as the usage time increases.
[ summary of the invention ]
It is known that the battery capacity of an electronic device (e.g., a notebook computer) using a rechargeable battery unit decreases with time, and therefore, the battery capacity displayed by the electronic device is often inconsistent with the actual battery capacity after the electronic device is used for a period of time.
In some embodiments, a method of controlling a current transfer state of a battery module includes: the method comprises the steps of reading a design battery capacity of a battery module from a battery fuel gauge, calculating an expected charge-discharge current according to the design battery capacity and a charge-discharge efficiency specified by the battery module, causing the battery module to discharge, and monitoring a discharge state of the battery module in a discharge process of the battery module. The step of monitoring the discharge state of the battery module includes reading a current discharge current from the battery fuel gauge, comparing the current discharge current with an expected charge-discharge current, regulating an electronic device to operate to reduce power consumption of the electronic device when the current discharge current is greater than the expected charge-discharge current, regulating the electronic device to operate to increase power consumption of the electronic device when the current discharge current is less than the expected charge-discharge current, and maintaining the electronic device to operate when the current discharge current is equal to the expected charge-discharge current.
In some embodiments, a method of calibrating a battery capacity of a battery module, comprising: reading a design battery capacity of a battery module from a battery fuel gauge, calculating an expected charge-discharge current according to the design battery capacity and a charge-discharge efficiency specified by the battery module, causing the battery module to discharge, monitoring a discharge state of the battery module and calibrating a discharge curve of the battery module during a discharge process of the battery module. The step of monitoring the discharge state of the battery module includes reading a current discharge current from the battery fuel gauge, comparing the current discharge current with an expected charge-discharge current, regulating an electronic device to operate to reduce power consumption of the electronic device when the current discharge current is greater than the expected charge-discharge current, regulating the electronic device to operate to increase power consumption of the electronic device when the current discharge current is less than the expected charge-discharge current, and maintaining the electronic device to operate when the current discharge current is equal to the expected charge-discharge current.
In some embodiments, an electronic device includes a battery module, a battery fuel gauge, a number of functional components, a charging and discharging circuit, and an embedded controller, wherein the battery fuel gauge is coupled to the battery module and monitors the battery module; the charging and discharging circuit is coupled between the battery module and each functional component; the embedded controller is coupled with the battery fuel gauge. The embedded controller reads a designed battery capacity of the battery module from the battery fuel gauge, calculates an expected charging and discharging current according to the designed battery capacity and a charging and discharging efficiency specified by the battery module, controls the charging and discharging circuit to discharge the battery module, reads a current discharging current from the battery fuel gauge in a discharging process of the battery module, compares the current discharging current with the expected charging and discharging current, regulates and controls less one of the plurality of functional components to work to reduce the power consumption of the electronic device when the current discharging current is greater than the expected charging and discharging current, regulates and controls less one of the plurality of functional components to work to increase the power consumption of the electronic device when the current discharging current is less than the expected charging and discharging current, and maintains the plurality of functional components to work when the current discharging current is equal to the expected charging and discharging current.
In summary, the present invention provides an electronic device, a method for controlling a current transmission state of a battery module, and a method for calibrating a battery capacity of a battery module, which can design a discharge program for providing a constant current based on the battery capacity and a charge/discharge efficiency. In some embodiments, the present invention provides an electronic device, a method for controlling a current transmission state of a battery module, and a method for calibrating a battery capacity of the battery module, which are capable of designing a charging procedure for providing a constant current based on the battery capacity and charging/discharging efficiency. In some embodiments, the present invention provides an electronic device, a method for controlling a current transmission state of a battery module, and a method for calibrating a battery capacity of the battery module, which can recalibrate a discharge curve of the battery module by a constant current discharge procedure or a constant current charge procedure, and further recalibrate a precision of the battery capacity, so that the displayed battery capacity substantially coincides with an actual battery capacity.
[ description of the drawings ]
Fig. 1 is a schematic block diagram of an electronic device according to an embodiment of the invention.
Fig. 2 is a flowchart illustrating a method for controlling a current transmission state of a battery module according to an embodiment of the invention.
Fig. 3 is a flowchart illustrating a method for calibrating battery capacity of a battery module according to an embodiment of the invention.
FIG. 4 is a schematic flow chart of some embodiments of step S40 in FIG. 2 or step S40' in FIG. 3.
[ detailed description ] embodiments
Fig. 1 is a schematic block diagram of an electronic device according to an embodiment of the invention. Referring to fig. 1, an electronic device 100 includes a battery unit 110 having a battery module 111 and a battery fuel gauge 112, a charging/discharging circuit 120, an embedded controller 130, and a plurality of functional components 150, wherein the battery fuel gauge 112 is coupled to the battery module 111 and monitors the battery module 111. The charging and discharging circuit 120 is coupled between the battery module 111 and each functional component 150 (i.e., the cpu 151, the fan 152, the screen 153, etc.). The embedded controller 130 is coupled to the battery fuel gauge 112, the charging/discharging circuit 120 and the plurality of functional components 150.
The battery module 111 of the battery unit 110 is used to store power and provide the stored battery power to the electronic device 100, so that the battery module can be used as one of the power sources for maintaining the operation of the electronic device 100. In one embodiment, the battery module 111 may be a single battery cell. In another embodiment, the battery module 111 may be a battery pack including a plurality of battery cells, and the battery cells may be connected in series or in parallel according to the power supply specification of the battery unit 110. In some embodiments, the battery module 111 may be a lithium ion battery, a lithium phosphate battery, a lithium polymer battery, a nickel cadmium battery, a lead acid battery, or any other type of battery suitable for secondary charging.
The battery fuel gauge 112 in the battery unit 110 is used for monitoring the battery module 111 and measuring usage information of the battery module 111, such as a current capacity information, a current maximum battery capacity, a designed battery capacity (or designed capacity), a current discharge current, and the like of the battery module 111. In other words, the battery fuel gauge 112 can read the design battery capacity and the current discharge current of the battery module 111. In some embodiments, the battery fuel gauge 112 may be a gauge integrated circuit (gauge IC), but the invention is not limited thereto.
The embedded controller 130 may execute the battery fuel gauge 112 to read the designed battery capacity of the battery module 111 and calculate an expected charge-discharge current according to the measured designed battery capacity and a charge-discharge efficiency specified by the battery module 111. Then, the embedded controller 130 may control the charging and discharging circuit 120 to discharge the battery module 111. And regulates the operation of less than one of the plurality of functional components 150 based on the current discharge current from the battery fuel gauge 112 during the discharge process.
In addition, in some embodiments, after the discharging process of the battery module 111 is completed, the embedded controller 130 may control the charging and discharging circuit 120 to charge the battery module 111 with a desired charging and discharging current.
Also, in some embodiments, the battery fuel gauge 112 may also be used to perform calibration of the discharge curve of the battery module 111 during the discharge process or the charge process of the battery module 111.
In some embodiments, the charging/discharging circuit 120 may be a charging/discharging system chip, but the invention is not limited thereto.
In an embodiment, the electronic device 100 may further include a power receiving terminal 140, and the charging and discharging circuit 120 is coupled between the power receiving terminal 140 and the battery unit 110. The power receiver 140 is used for receiving external power. The charging and discharging circuit 120 is controlled by the embedded controller 130. Here, the charging and discharging circuit 120 can convert the external power received by the power receiving terminal 140 into a charging voltage having a corresponding potential according to the control of the embedded controller 130, and charge the battery module 111 with the charging voltage.
In an embodiment, the plurality of functional components 150 includes at least one of a central processing unit 151, a screen 152 and a fan 153, but the invention is not limited thereto.
Referring to fig. 1, 2 and 4, the embedded controller 130 is used to control the current transmission state of the battery module 111 and calibrate the battery capacity of the battery module 111. In one embodiment, the embedded controller 130 first reads a design battery capacity of the battery module 111 from the battery fuel gauge 112 (step S10), and then calculates an expected charge/discharge current according to the read design battery capacity and a charge/discharge efficiency of the battery module 111 specification (step S20). The embedded controller 130 causes the battery module 111 to be discharged (step S30), and monitors the discharge state of the battery module 111 during the discharge of the battery module 111 (step S40).
Please refer to fig. 4. In some embodiments, during the discharging process, the embedded controller 130 reads a current discharging current from the battery fuel gauge 112 (step S41), and then compares the current discharging current with the calculated expected charging/discharging current (step S42). When the current discharging current is greater than the expected charging/discharging current (step S43), the embedded controller 130 regulates the operation of the electronic device 100 to reduce the power consumption of the electronic device 100 (step S44). When the current discharging current is equal to the expected charging/discharging current (step S45), the embedded controller 130 maintains the electronic device 100 operating (step S46). When the current discharge is smaller than the expected charging/discharging current (step S47), the embedded controller 130 regulates the operation of the electronic device 100 to increase the power consumption of the electronic device 100 (step S48). Here, the embedded controller 130 repeats the above steps (i.e., returns to S41) periodically until the battery module 111 is completely discharged.
In some embodiments, the step S44 can include executing at least one of the following procedures, such as the embedded controller 130 regulating to reduce the power consumption of the central processor 151 of the electronic device 100 (e.g., reducing the frequency of the central processor 151), dimming the brightness of the screen 153 of the electronic device 100, and reducing the rotation speed of the fan 152 of the electronic device 100. For example, when the embedded controller 130 monitors that the current discharging current is greater than the expected charging/discharging current, the embedded controller 130 outputs a control signal to the system, so that the system reduces the power consumption of the central processing unit 151, dims the brightness of the screen 153, reduces the rotation speed of the fan 152, or any combination thereof according to the control signal.
In some embodiments, the step S48 can include executing at least one of the following procedures, such as the embedded controller 130 adjusting to increase the power consumption of the central processor 151 of the electronic device 100 (e.g., increasing the frequency of the central processor 151), adjusting the brightness of the screen 153 of the electronic device 100, and increasing the rotation speed of the fan 152 of the electronic device 100. For example, when the embedded controller 130 monitors that the current discharging current is smaller than the expected charging/discharging current, the embedded controller 130 outputs a control signal to the system, so that the system increases the power consumption of the central processing unit 151, brightens the brightness of the screen 153, increases the rotation speed of the fan 152, or any combination thereof according to the control signal.
Referring to fig. 1, fig. 3 and fig. 4, in some embodiments, during the discharging process of the battery module 111, the embedded controller 130 further calibrates a discharging curve of the battery module 111 (step S40'). Since the embodiment of the step of calibrating the discharge curve is well known to those skilled in the art, it is not described herein again.
In some embodiments, referring to fig. 1 and fig. 2, after the discharging process of the battery module 111 is completed (i.e., after step S40 or S40'), the embedded controller 130 charges the battery module 111 with the expected charging and discharging current (step S50).
In some embodiments, referring to fig. 1 and fig. 3, during the charging process of the battery module 111, the embedded controller 130 further performs a calibration of a charging curve of the battery module 111 (step S50').
In an example, the embedded controller 130 reads the designed battery capacity of the battery module 111 as 2000 milliamperes (mAh) from the battery fuel gauge 112 (i.e., step S10), and then calculates the expected charge and discharge current as 400mAh (2000mAh X0.2C — 400mAh) according to the charge and discharge efficiency 0.2 coulomb (C) specified by the battery module 111 (i.e., step S20). The embedded controller 130 causes the battery module 111 to be discharged (i.e., step S30), and monitors the discharge state of the battery module 111 during the discharge process (i.e., step S40) and recalibrates the battery capacity of the battery module 111 (i.e., step S40'). During the discharging process, the embedded controller 130 reads a current discharging current from the battery fuel gauge 112 (i.e., step S41), and if it exceeds 400mAh (i.e., step S43), the power consumption of the cpu 151 is reduced, the brightness of the screen 153 is reduced, or other methods for reducing the power consumption (i.e., step S44) are performed, so that the discharging current may be equal to or close to 400 mAh. On the contrary, if it is lower than 400mAh (i.e., step S47), the power consumption of the cpu 151 is increased, the brightness of the screen 153 is increased, or other methods for increasing the power consumption (i.e., step S48) are performed, so that the discharge current can be equal to or close to 400 mAh.
In another embodiment, during the charging process, the embedded controller 130 controls the charging current to be 400mAh for charging (i.e., step S50) and recalibrates the battery capacity of the battery module 111, i.e., calibrates the charging curve (i.e., step S50').
In summary, according to the electronic device, the control method of the current transmission state of the battery module, and the calibration method of the battery capacity of the battery module of some embodiments of the present invention, it is able to design the discharge procedure for providing a constant current based on the battery capacity and the charge/discharge efficiency. In some embodiments, the electronic device, the method for controlling the current transmission state of the battery module, and the method for calibrating the battery capacity of the battery module according to some embodiments of the present invention can further design a charging procedure for providing a constant current based on the battery capacity and the charging/discharging efficiency. In some embodiments, according to the electronic device, the method for controlling the current transmission state of the battery module, and the method for calibrating the battery capacity of the battery module of the present invention, the discharging curve of the battery module can be recalibrated by the constant current discharging procedure or the constant current charging procedure, so as to recalibrate the accuracy of the battery capacity, so that the displayed battery capacity substantially coincides with the actual battery capacity.
The technical disclosure of the present invention is described in the above-mentioned preferred embodiments, but the present invention is not limited thereto, and those skilled in the art should understand that the present invention can be modified and modified without departing from the spirit of the present invention, and therefore, the scope of the present invention should be determined by the appended claims.
Claims (13)
1. A method of controlling a current transfer state of a battery module, comprising:
reading a design battery capacity of a battery module from a battery fuel gauge;
calculating an expected charge-discharge current according to the designed battery capacity and a charge-discharge efficiency specified by the battery module;
causing the battery module to discharge; and
monitoring a discharge state of the battery module during a discharge process of the battery module, wherein the step of monitoring the discharge state of the battery module comprises:
reading a present discharge current from the battery fuel gauge;
comparing the current discharge current with the expected charge-discharge current;
when the current discharge current is larger than the expected charge-discharge current, regulating and controlling an electronic device to work so as to reduce the power consumption of the electronic device;
when the current discharge current is smaller than the expected charge-discharge current, regulating and controlling the electronic device to work so as to increase the power consumption of the electronic device; and
when the current discharge current is equal to the expected charge-discharge current, the electronic device is maintained to work.
2. The method of controlling a current transfer state of a battery module according to claim 1, further comprising: after the discharging process is finished, the battery module is charged with the expected charging and discharging current.
3. The method as claimed in claim 1, wherein the step of regulating the operation of the electronic device to reduce the power consumption of the electronic device comprises at least one of the following procedures:
reducing power consumption of a CPU of the electronic device
Dimming the brightness of a screen of the electronic device; and
the rotating speed of a fan of the electronic device is reduced.
4. The method as claimed in claim 1, wherein the step of regulating the operation of the electronic device to increase the power consumption of the electronic device comprises at least one of the following procedures:
increasing the power consumption of a central processing unit of the electronic device;
adjusting brightness of a screen of the electronic device; and
increasing the rotation speed of a fan of the electronic device.
5. A method of calibrating a battery capacity of a battery module, comprising:
reading a design battery capacity of a battery module from a battery fuel gauge;
calculating an expected charge-discharge current according to the designed battery capacity and a charge-discharge efficiency specified by the battery module;
causing the battery module to discharge;
monitoring a discharge state of the battery module during a discharge process of the battery module, wherein the step of monitoring the discharge state of the battery module comprises:
reading a present discharge current from the battery fuel gauge;
comparing the current discharge current with the expected charge-discharge current;
when the current discharge current is larger than the expected charge-discharge current, regulating and controlling an electronic device to work so as to reduce the power consumption of the electronic device;
when the current discharge current is smaller than the expected charge-discharge current, regulating and controlling the electronic device to work so as to increase the power consumption of the electronic device; and
maintaining the electronic device to operate when the current discharge current is equal to the expected charge-discharge current; and
and calibrating a discharge curve of the battery module in the discharge process of the battery module.
6. The method for calibrating battery capacity of a battery module according to claim 5, further comprising:
after the discharging process is finished, the battery module is charged by the expected charging and discharging current; and
and calibrating a charging curve of the battery module in the charging process of the battery module.
7. The method of claim 5, wherein the step of regulating the operation of the electronic device to reduce the power consumption of the electronic device comprises performing at least one of the following procedures:
reducing the power consumption of a central processing unit of the electronic device;
dimming the brightness of a screen of the electronic device; and
the rotating speed of a fan of the electronic device is reduced.
8. The method of claim 5, wherein the step of regulating the operation of the electronic device to increase the power consumption of the electronic device comprises performing at least one of the following procedures:
increasing the power consumption of a central processing unit of the electronic device;
adjusting brightness of a screen of the electronic device; and
increasing the rotation speed of a fan of the electronic device.
9. An electronic device, comprising:
a battery module;
a battery fuel gauge coupled to the battery module for monitoring the battery module;
a number of functional components;
a charging and discharging circuit coupled between the battery module and each functional component; and
an embedded controller coupled to the battery fuel gauge, the embedded controller executing:
reading a design battery capacity of the battery module from the battery fuel gauge;
calculating an expected charge-discharge current according to the designed battery capacity and a charge-discharge efficiency specified by the battery module;
controlling the charge and discharge circuit to discharge the battery module;
reading a current discharging current from the battery fuel gauge in the discharging process of the battery module, and comparing the current discharging current with the expected charging and discharging current;
when the current discharge current is larger than the expected charge-discharge current, regulating and controlling one of the plurality of functional components to work so as to reduce the power consumption of the electronic device;
when the current discharge current is smaller than the expected charge-discharge current, regulating and controlling one of the plurality of functional components to work so as to increase the power consumption of the electronic device; and
when the current discharge current is equal to the expected charge and discharge current, the plurality of functional components are maintained to work.
10. The electronic device of claim 9, wherein the battery fuel gauge further calibrates a discharge curve of the battery module during the discharging of the battery module.
11. The electronic device of claim 9, wherein after the discharging process is completed, the embedded controller further performs: and controlling the charge and discharge circuit to charge the battery module with the expected charge and discharge current.
12. The electronic device of claim 11, wherein the battery fuel gauge further calibrates a charging curve of the battery module during charging of the battery module.
13. The electronic device of claim 9, wherein the plurality of functional components comprise at least one of a cpu, a screen, and a fan.
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