CN112684353B - Control of current transmission state of battery module and calibration method of battery capacity - Google Patents
Control of current transmission state of battery module and calibration method of battery capacity Download PDFInfo
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- CN112684353B CN112684353B CN201910987139.2A CN201910987139A CN112684353B CN 112684353 B CN112684353 B CN 112684353B CN 201910987139 A CN201910987139 A CN 201910987139A CN 112684353 B CN112684353 B CN 112684353B
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- 238000000034 method Methods 0.000 title claims abstract description 57
- 230000005540 biological transmission Effects 0.000 title claims abstract description 17
- 238000007599 discharging Methods 0.000 claims abstract description 65
- 238000007600 charging Methods 0.000 claims abstract description 33
- 230000001276 controlling effect Effects 0.000 claims abstract description 25
- 230000001105 regulatory effect Effects 0.000 claims abstract description 15
- 230000005611 electricity Effects 0.000 claims abstract description 12
- 238000012544 monitoring process Methods 0.000 claims abstract description 12
- 238000013461 design Methods 0.000 claims abstract description 10
- 239000000446 fuel Substances 0.000 claims description 21
- 238000013459 approach Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 229910001386 lithium phosphate Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- TWQULNDIKKJZPH-UHFFFAOYSA-K trilithium;phosphate Chemical compound [Li+].[Li+].[Li+].[O-]P([O-])([O-])=O TWQULNDIKKJZPH-UHFFFAOYSA-K 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A method of controlling a current transmission state of a battery module and calibrating a battery capacity, the method of controlling a current transmission state of a battery module comprising: reading a design battery capacity of a battery module from a battery electricity meter, calculating an expected charge-discharge current according to the design battery capacity and a charge-discharge efficiency of a battery module specification, causing the battery module to discharge, and monitoring a discharge state of the battery module during the discharge process of the battery module, wherein the step of monitoring the discharge state of the battery module comprises reading a current discharge current from the battery electricity meter, comparing the current discharge current with the expected charge-discharge current, and regulating and controlling an electronic device to work according to a comparison result so as to reduce or increase power consumption of the electronic device or maintain the electronic device to work. The method for controlling the current transmission state and calibrating the battery capacity of the battery module can be used for providing a discharging program of constant current based on the design of the battery capacity and the charging and discharging efficiency.
Description
[ Field of technology ]
The present invention relates to a method for calibrating battery capacity, and more particularly to a method for controlling a current transmission state of an electronic device, a battery module, and a method for calibrating battery capacity of a battery module.
[ Background Art ]
Technological development is becoming more and more advanced, environmental awareness and energy conservation have become mainstream demands. Compared with the disposable primary battery of the conventional system, among various electronic devices in widespread use in the society, electronic devices using a battery unit having a recharging function as a main power source are becoming popular and mainstream.
The rechargeable battery cell may be recharged and reused after discharging. In general, a battery cell is composed of five parts of a positive electrode, a negative electrode, an electrolyte, a separator, and a container, and charge and discharge operations of the battery cell are accomplished based on redox reactions in electrochemistry.
However, as the service time increases or the battery is not used for a while, the rechargeable battery cells may be affected by time, ambient temperature, etc., to cause degradation of the battery and decrease the battery capacity thereof with the increase of time.
[ Invention ]
It is known that the battery capacity of an electronic device (such as a notebook computer) using a rechargeable battery unit is reduced with time, so that the battery capacity of the electronic device after a period of use is often inconsistent with the actual battery capacity.
In some embodiments, a method of controlling a current transmission state of a battery module includes: reading a designed 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 of the battery module specification, causing the battery module to discharge, and monitoring a discharge state of the battery module during the discharge process of the battery module. The step of monitoring the discharge state of the battery module includes reading a present discharge current from the battery fuel gauge, comparing the present discharge current with an expected charge-discharge current, regulating an electronic device to operate to reduce power consumption of the electronic device when the present 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 present discharge current is less than the expected charge-discharge current, and maintaining the electronic device operating when the present discharge current is equal to the expected charge-discharge current.
In some embodiments, a method of calibrating battery capacity of a battery module includes: reading a designed 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 of the battery module specification, causing the battery module to discharge, and monitoring a discharge state of the battery module and calibrating a discharge curve of the battery module during the discharge process of the battery module. The step of monitoring the discharge state of the battery module includes reading a present discharge current from the battery electricity meter, comparing the present discharge current with an expected charge-discharge current, regulating an electronic device to operate to reduce power consumption of the electronic device when the present 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 present discharge current is less than the expected charge-discharge current, and maintaining the electronic device operating when the present 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 charge-discharge circuit, and an embedded controller, wherein the battery fuel gauge is coupled to the battery module and monitors the battery module; the charge-discharge circuit is coupled between the battery module and each functional component; the embedded controller is coupled to the battery fuel gauge. The embedded controller reads a designed battery capacity of the battery module from the battery fuel gauge, calculates an expected charge-discharge current according to the designed battery capacity and a charge-discharge efficiency of the battery module specification, controls the charge-discharge circuit to discharge the battery module, reads a current discharge current from the battery fuel gauge during the discharge process of the battery module, compares the current discharge current with the expected charge-discharge current, regulates and controls less of the plurality of functional components to operate so as to reduce the power consumption of the electronic device when the current discharge current is larger than the expected charge-discharge current, regulates and controls less of the plurality of functional components to operate so as to increase the power consumption of the electronic device when the current discharge current is smaller than the expected charge-discharge current, and maintains the plurality of functional components to operate when the current discharge current is equal to the expected charge-discharge current.
In view of the foregoing, 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 provide a discharging program of a constant current based on a design battery capacity and a charging/discharging efficiency thereof. 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 also provide a constant current charging program based on the design of the battery capacity and the 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 can recalibrate a discharging curve of the battery module with a discharging procedure or a charging procedure of a constant current, and recalibrate a precision of the battery capacity thereof, 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 control method of 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 flow chart of some embodiments of step S40 in fig. 2 or step S40' in fig. 3.
[ Detailed description ] of the invention
Fig. 1 is a schematic block diagram of an electronic device according to an embodiment of the invention. Referring to fig. 1, the electronic device 100 includes a battery unit 110 having a battery module 111 and a battery fuel gauge 112, a charge/discharge 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 charge-discharge circuit 120 is coupled between the battery module 111 and each of the functional components 150 (i.e., the cpu 151, the fan 152, the screen 153, etc.). The embedded controller 130 is coupled to the battery gauge 112, the charge/discharge circuit 120 and the functional components 150.
The battery module 111 in the battery unit 110 is used to store power, and can provide the stored battery power to the electronic device 100, thus being one of 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 parallel according to the power supply specification of the battery cells 110. In some implementations, 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 electricity meter 112 in the battery unit 110 is used for monitoring the battery module 111, and can be used for measuring usage information of the battery module 111, such as the electricity information of the battery module 111, the current maximum battery capacity, the designed battery capacity (designed battery capacity, or DESIGN CAPACITY), the current discharge current, and the like. In other words, the battery electricity meter 112 can read the designed 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), although the invention is not limited in this regard.
The embedded controller 130 may execute the battery electricity meter 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 of the battery module 111 specification. Next, the embedded controller 130 may control the charge and discharge circuit 120 to discharge the battery module 111. And regulates operation of fewer of the number of functional components 150 based on the current discharge current by the battery fuel gauge 112 during discharge.
Furthermore, 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 calibrate the discharge curve of the battery module 111 during the discharge or charge of the battery module 111.
In some embodiments, the charge-discharge circuit 120 may be a charge-discharge 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/discharging circuit 120 is coupled between the power receiving terminal 140 and the battery unit 110. The power receiving end 140 is used for receiving external power. The charge-discharge circuit 120 is controlled by the embedded controller 130. Here, the charge/discharge circuit 120 may convert the external power received by the power receiving terminal 140 into a charge voltage having a corresponding potential according to the control of the embedded controller 130, and charge the battery module 111 with the charge voltage.
In one embodiment, the functional units 150 include at least one of a cpu 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 for controlling the current transmission state of the battery module 111 and calibrating the battery capacity of the battery module 111. In one embodiment, first, the embedded controller 130 reads a designed 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 designed battery capacity and a charge/discharge efficiency of the battery module 111 (step S20). The embedded controller 130 causes the battery module 111 to discharge (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 again. In some embodiments, during the discharging process, the embedded controller 130 reads a current discharging current from the battery electricity meter 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 and discharging current (step S43), the embedded controller 130 regulates the electronic device 100 to operate so as 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 charge-discharge 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 periodically and repeatedly performs the above steps (i.e., returns to S41) until the battery module 111 is completely discharged.
In some embodiments, the step S44 may include executing at least one procedure such as the embedded controller 130 controlling to reduce the power consumption of the cpu 151 of the electronic device 100 (e.g. to reduce the frequency of the cpu 151), to dim the brightness of the screen 153 of the electronic device 100, and to reduce the rotation speed of the fan 152 of the electronic device 100. For example, when the embedded controller 130 monitors that the present discharging current is greater than the expected discharging current, the embedded controller 130 outputs a control signal to the system, so that the system reduces the power consumption of the cpu 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 may include executing at least one procedure such as the embedded controller 130 adjusting to increase the power consumption of the cpu 151 of the electronic device 100 (e.g. adjusting the frequency of the cpu 151), to lighten the brightness of the screen 153 of the electronic device 100, and to increase the rotation speed of the fan 152 of the electronic device 100. For example, when the embedded controller 130 monitors that the present discharging current is smaller than the expected discharging current, the embedded controller 130 outputs a control signal to the system, so that the system increases the power consumption of the cpu 151, lightens 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, 3 and 4, in some embodiments, during the discharging process of the battery module 111, the embedded controller 130 further performs calibration of a discharging curve of the battery module 111 (step S40'). Herein, since the implementation of the step of calibrating the discharge curve is well known to those skilled in the art, the description thereof is omitted.
In some embodiments, referring to fig. 1 and 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 desired charging/discharging current (step S50).
In some embodiments, referring to fig. 1 and 3, during the charging process of the battery module 111, the embedded controller 130 further performs 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 from the battery fuel gauge 112 to be 2000 milliamperes (mAh) (i.e. step S10), and then calculates the expected charge-discharge current to be 400mAh (2000 mAh X0.2c=400 mAh) according to the charge-discharge efficiency of 0.2 coulomb (C) charge-discharge 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 discharging (i.e., step S40) and recalibrates the battery capacity of the battery module 111 (i.e., step S40'). During discharging, the embedded controller 130 reads a current discharging current from the battery electricity meter 112 (step S41), and if the current discharging current exceeds 400mAh (step S43), the power consumption of the cpu 151 is reduced, the brightness of the screen 153 is reduced, or other power consumption reducing methods are used (step S44), so that the discharging current can be equal to or approach 400mAh. Otherwise, if it is lower than 400mAh (step S47), the power consumption of the CPU 151 is increased, the brightness of the screen 153 is increased, or other power consumption increasing method is performed (step S48), so that the discharge current can be equal to or approach 400mAh.
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 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, a discharging program for providing a constant current can be designed based on the battery capacity and the charging/discharging 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 also provide a constant current charging program based on the design of the battery capacity and the charge/discharge 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 some embodiments of the present invention, the discharging curve of the battery module and thus the accuracy of the battery capacity of the battery module can be recalibrated by a constant current discharging program or a constant current charging program, so that the displayed battery capacity is substantially consistent with the actual battery capacity.
The present invention has been described in terms of the preferred embodiments, but it is not limited thereto, and modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, so that the scope of the invention is defined by the appended claims.
Claims (12)
1. A method for controlling a current transmission 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 of the battery module specification;
causing the battery module to discharge; and
During the discharging process of the battery module, monitoring the discharging state of the battery module, wherein the step of monitoring the discharging state of the battery module comprises the following steps:
Reading a present discharge current from the battery electricity meter;
comparing the present discharge current with the expected charge-discharge current;
When the current discharging current is larger than the expected charging and discharging current, regulating and controlling an electronic device to work so as to reduce the power consumption of the electronic device;
When the current discharging current is smaller than the expected charging and discharging current, regulating and controlling the electronic device to work so as to increase the power consumption of the electronic device; and
When the current discharging current is equal to the expected charging and discharging current, the electronic device is maintained to work.
2. The method for controlling the current transmission state of a battery module according to claim 1, further comprising: after the discharging process is completed, the battery module is charged with the expected charge-discharge current.
3. The method of claim 1, wherein the step of controlling the electronic device to operate to reduce the power consumption of the electronic device comprises executing at least one of the following:
reducing power consumption of a CPU of the electronic device
Dimming a screen of the electronic device; and
The rotation speed of a fan of the electronic device is reduced.
4. The method of claim 1, wherein the step of controlling the electronic device to operate to increase the power consumption of the electronic device comprises executing at least one of the following:
increasing power consumption of a central processing unit of the electronic device;
brightness of a screen of the electronic device is regulated; and
The rotating speed of a fan of the electronic device is increased.
5. A method for calibrating 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 of the battery module specification;
causing the battery module to discharge;
During the discharging process of the battery module, monitoring the discharging state of the battery module, wherein the step of monitoring the discharging state of the battery module comprises the following steps:
Reading a present discharge current from the battery electricity meter;
comparing the present discharge current with the expected charge-discharge current;
When the current discharging current is larger than the expected charging and discharging current, regulating and controlling an electronic device to work so as to reduce the power consumption of the electronic device;
When the current discharging current is smaller than the expected charging and discharging current, regulating and controlling the electronic device to work so as to increase the power consumption of the electronic device; and
When the current discharging current is equal to the expected charging and discharging current, maintaining the electronic device to work; and
During the discharging process of the battery module, calibration of a discharging curve of the battery module is performed.
6. The method for calibrating a battery capacity of a battery module according to claim 5, further comprising:
After the discharging process is completed, charging the battery module by the expected charging and discharging current; and
During the charging process of the battery module, calibration of a charging curve of the battery module is performed.
7. The method of calibrating battery capacity of a battery module of claim 5, wherein the step of regulating operation of the electronic device to reduce the power consumption of the electronic device comprises performing at least one of the following:
reducing power consumption of a central processing unit of the electronic device;
Dimming a screen of the electronic device; and
The rotation speed of a fan of the electronic device is reduced.
8. The method of calibrating battery capacity of a battery module of claim 5, wherein the step of regulating operation of the electronic device to increase the power consumption of the electronic device comprises performing at least one of the following:
increasing power consumption of a central processing unit of the electronic device;
brightness of a screen of the electronic device is regulated; and
The rotating speed of a fan of the electronic device is increased.
9. An electronic device, comprising:
A battery module;
A battery electricity meter coupled to the battery module for monitoring the battery module;
A plurality of functional components;
a charge-discharge circuit coupled between the battery module and each of the functional components; and
An embedded controller coupled to the battery gauge, the embedded controller performing:
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 of the battery module specification;
controlling the charge-discharge circuit to discharge the battery module;
reading a current discharge current from the battery fuel gauge during the discharging process of the battery module, and comparing the current discharge current with the expected charge-discharge current;
when the current discharging current is larger than the expected charging and discharging current, regulating and controlling less of the functional components to work so as to reduce the power consumption of the electronic device;
when the current discharging current is smaller than the expected charging and discharging current, regulating and controlling less of the functional components to work so as to increase the power consumption of the electronic device;
when the current discharging current is equal to the expected charging and discharging current, the functional components are maintained to work; and
During the discharging process of the battery module, the battery fuel gauge also performs calibration of a discharging curve of the battery module.
10. The electronic device of claim 9, wherein after the discharging process is completed, the embedded controller further performs: the charge-discharge circuit is controlled to charge the battery module with the expected charge-discharge current.
11. The electronic device of claim 10, wherein the battery fuel gauge further performs calibration of a charging curve of the battery module during charging of the battery module.
12. The electronic device of claim 9, wherein the plurality of functional components comprises at least one of a central processing unit, a screen, and a fan.
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| CN201910987139.2A CN112684353B (en) | 2019-10-17 | 2019-10-17 | Control of current transmission state of battery module and calibration method of battery capacity |
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| CN201910987139.2A CN112684353B (en) | 2019-10-17 | 2019-10-17 | Control of current transmission state of battery module and calibration method of battery capacity |
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