TWI614512B - Gauging method for battery discharge-capacity corresponding to temperature and electronic device using the same - Google Patents

Abstract

A method for measuring battery power corresponding to temperature, comprising: detecting a temperature of a battery module of an electronic device according to a predetermined condition, detecting a internal resistance of the battery module if the temperature satisfies a predetermined condition, and estimating a battery module according to the internal resistance The battery power and if the temperature does not meet the predetermined conditions, the voltage and output current of the battery module are detected and the battery power of the battery module is generated according to the temperature, voltage and output current.

Description

Method for measuring battery power corresponding to temperature and electronic device thereof

The present invention relates to battery power management techniques, and more particularly to a method of measuring battery power corresponding to temperature and an electronic device therefor.

Portable electronic devices, such as mobile phones, notebooks (NBs), and personal digital assistants (PDAs), can be quickly used, not because of the use of battery modules. It is supplied with a power source and has portability characteristics.

Due to the requirement of using the upper voltage, in many applications, it is necessary to use a plurality of sets of unit cells in series to obtain a battery module having a desired voltage. In order to maximize the performance of the battery module and extend the life of the battery module, the electronic device generally has a battery management system to monitor the battery module. The battery management system can be used to obtain status information of the battery module, protection of overcharge and discharge, estimation of equalization of battery voltage and/or battery remaining capacity, and the like. However, an unexpected lack of power can cause an electronic device to be powered off and shut down instantaneously, resulting in loss of data or damage to components of the electronic device. Therefore, in recent use of battery modules, monitoring of battery status, such as temperature, voltage, current, and residual capacity status, has become an important function of the battery module power supply system.

The battery management system for electronic devices is generally Texas Instruments (Texas) Instruments; TI) Gauge technology to estimate battery residual capacity. However, at low temperatures, TI metering techniques are significantly inaccurate and easy to judge errors, thus causing electronic devices to be easily caused by battery information errors.

In one embodiment, a method for measuring battery power corresponding to temperature includes: detecting a temperature of a battery module of the electronic device according to a predetermined condition, and detecting an internal resistance of the battery module if the temperature satisfies a predetermined condition and The battery capacity of the battery module is estimated according to the internal resistance, and if the temperature does not satisfy the predetermined condition, the voltage and output current of the battery module are detected and the battery power of the battery module is generated according to the temperature, the voltage and the output current.

In one embodiment, an electronic device corresponding to a temperature measuring battery power includes: a battery module, a temperature sensing unit, a storage unit, and a processing unit. The processing unit is coupled to the battery module, the temperature sensing unit and the storage unit. The battery module is used to supply the power required for the operation of the electronic device. The temperature sensing unit is used to measure the temperature of the battery module. The storage unit stores a predetermined condition. The processing unit receives the temperature and confirms the received temperature according to the established conditions. If the temperature satisfies the predetermined condition, the processing unit detects the internal resistance of the battery module and estimates the battery level of the battery module according to the internal resistance. If the temperature does not meet the predetermined conditions, the processing unit detects the voltage and output current of the battery module and generates the battery power of the battery module according to the temperature, the voltage, and the output current.

In summary, the method for measuring the battery power corresponding to temperature according to the embodiment of the present invention and the electronic device thereof can be applied to an electronic device, so that the electronic device uses a hybrid battery algorithm to estimate the residual power of the battery module. The residual power of the battery module can be accurately provided at a low temperature, thereby preventing the electronic device from being easily malfunctioned due to battery information errors or/and avoiding an electronic device having no early warning power-off event.

10‧‧‧Electronic devices

110‧‧‧Processing unit

130‧‧‧Battery module

150‧‧‧Temperature sensing unit

170‧‧‧ storage unit

180‧‧‧Display unit

190‧‧‧Other components

S202‧‧‧Create corresponding data

S210‧‧‧Detecting the temperature of the battery module of the electronic device according to the established conditions

S212‧‧‧Measure the temperature of the battery module

S214‧‧‧Confirm the received temperature according to the established conditions

Does S220‧‧‧ meet the established conditions?

S230‧‧‧Detecting the internal resistance of the battery module

S240‧‧‧ Estimate the battery level of the battery module based on internal resistance

S242‧‧‧Using the Texas Instruments algorithm to estimate the battery level of the battery module based on the internal resistance of the battery module

S250‧‧‧Detecting the voltage and current of the battery module

S252‧‧‧Using the corresponding data to generate the battery power corresponding to the temperature, voltage and output current of the battery module

S260‧‧‧ Estimate the battery level of the battery module based on temperature, voltage and current

S270‧‧‧ Display the percentage of power on the display unit according to the battery level

1 is a functional block diagram of an embodiment of an electronic device corresponding to temperature metering of a battery according to the present invention.

2 is a flow chart of an embodiment of a method of measuring battery power corresponding to temperature in accordance with the present invention.

3 is a flow chart of another embodiment of a method of measuring battery power corresponding to temperature in accordance with the present invention.

4 is a schematic diagram of an embodiment of corresponding data.

Figure 5 is a schematic illustration of another embodiment of corresponding data.

Referring to FIG. 1 , an electronic device (hereinafter referred to as the electronic device 10 ) corresponding to the temperature measurement battery power includes a processing unit 110 , a battery module 130 , a temperature sensing unit 150 , a storage unit 170 , and other components 190 . The processing unit 110 is coupled to the battery module 130, the temperature sensing unit 150, the storage unit 170, and other components 190. The temperature sensing unit 150 is coupled (contacted) or adjacent to the battery module 130.

Referring to FIG. 2, the temperature sensing unit 40 is configured to measure the temperature of the battery module 130 (step S212). The temperature of the battery module 130 may be the temperature of the battery module 130 itself or the temperature of the environment surrounding the battery module 130.

The processing unit 110 receives the temperature measured by the temperature sensing unit 40 and confirms the received temperature according to the predetermined condition (step S214) to confirm whether the temperature of the battery module 130 satisfies the predetermined condition (step S220).

If the received temperature meets the predetermined condition, the processing unit 110 detects the internal resistance of the battery module 130 (step S230), and estimates the battery power of the battery module 130 according to the detected internal resistance of the battery module 130, that is, the residual The amount of electricity (step S240). On the other hand, if the received temperature does not meet the predetermined condition, the processing unit 110 detects the voltage and the output current of the battery module 130 (step S250), and generates the battery module 130 according to the temperature, voltage, and output current of the battery module 130. The battery power, that is, the residual power (step S260).

In some embodiments, the established condition can be greater than a temperature threshold. Here, the processing unit 110 compares the received temperature and temperature thresholds. If the received temperature is greater than the temperature threshold, the processing unit 110 determines that the received temperature satisfies the predetermined condition; conversely, if the received temperature is less than or equal to the temperature threshold, the processing unit 110 determines that the received temperature does not satisfy the predetermined condition. In some embodiments, the temperature threshold can be 0 ° C.

In some embodiments of step S240, the processing unit 110 may utilize a Texas Instruments (TI) algorithm to detect the internal resistance of the battery module 130 to estimate the battery level (step S242), as shown in FIG.

In some embodiments of step S260, the processing unit 110 may generate a battery power corresponding to the temperature, voltage, and output current of the battery module 130 by using a corresponding data (step S262), as shown in FIG. In some embodiments, the corresponding data may be a corresponding curve of voltage and battery power based on different temperatures and different output currents, as shown in FIGS. 4 and 5. Figure 4 shows the corresponding curve of the voltage of different temperature and battery power of the battery module 130 of the model UF515161SX lithium battery at the output current of 2.100A. FIG. 5 shows a corresponding curve of the voltage of different temperatures and the battery power of the battery module 130 of the model UF515161SX lithium battery at an output current of 0.420A.

In some embodiments of step S260, the processing unit 110 may use the corresponding data to generate the battery power in an interpolated manner according to the temperature, voltage, and output current of the battery module 130. For example, if the corresponding data is a corresponding curve based on voltages of different temperatures and different output currents and battery power, the processing unit 110 selects a corresponding curve of the voltage and the battery power according to the temperature and output current of the battery module 130, and then The voltage of the battery module 130 is obtained by two sets of preselected voltages and preselected powers corresponding to each other. Here, the two preselected voltages are adjacent to the voltage of the battery module 130. Next, the processing unit 110 performs interpolation calculation on the voltage of the battery module 130 and the two sets of mutually corresponding preselected voltages and the preselected power levels to obtain the battery power corresponding to the voltage of the battery module 130.

In other words, when the temperature meets the predetermined condition, the processing unit 110 uses the TI Gauge technology to estimate the battery power of the battery module 130, and when the temperature does not meet the predetermined condition, the low temperature corresponding data is used to estimate the battery module. 130 battery power.

In some embodiments, the corresponding data can be established by performing a complex discharge test using the same battery module 130 and stored in advance in the storage unit 170 (step 202), as shown in FIG.

In some embodiments, the corresponding data can be established by performing a discharge test using a plurality of battery modules of the same factory condition as the battery module 130, and is stored in advance in the storage unit 170 (step 202), as shown in FIG.

In some embodiments, the electronic device 10 can include a display unit 180, and the display unit 180 is coupled to the processing unit 110. After the battery power is generated, the processing unit 110 displays the power percentage on the display unit 180 according to the generated battery power (step S270) to notify the user of the residual power of the battery module 130. In some embodiments, the percentage of power may be displayed on the display unit 180 as a battery icon or number. For example, the processing unit 110 will generate the battery The electric quantity calculates the electric power percentage based on the full load amount of the battery module 130, and displays the corresponding battery icon or number according to the calculated electric power percentage display unit 180.

In some embodiments, after the temperature determination (step S220), the processing unit 110 may repeatedly perform the detecting step, the estimating step, and the displaying step (ie, step S230, step S240 or S242 and step S270, or step S260, step S260) Or S262 and step S270) to know and/or display the current residual power of the battery module 130.

In some embodiments, the processing unit 110 re-determines the steps (ie, steps S210 and S220) at a predetermined time to determine an estimate of the amount of battery power employed.

In some embodiments, the processing unit 110 may be a microprocessor, a microcontroller, an embedded controller (EC), a digital signal processor, a microcomputer, or a central processing unit (CPU). .

In some embodiments, the battery module 130 is used to store power. The battery module 20 is coupled to a power supply end of each component of the electronic device 10 (eg, the processing unit 110, the temperature sensing unit 150, the storage unit 170, and other components 190, etc.). Moreover, in the operating state of the electronic device 10, the battery module 130 can operate according to various components of the stored power supply electronic device 10 (eg, the processing unit 110, the temperature sensing unit 150, the storage unit 170, and other components 190, etc.). The power needed. In some embodiments, battery module 130 can be comprised of one or more battery cells.

In some embodiments, the storage unit 170 can be used to store programs, parameters, data, and the like (eg, established conditions, TI algorithms, and corresponding data) required for operation, and parameters and data generated during the temporary operation. The storage unit 170 can be composed of one or more memory elements Implementation. Each memory component can be a read only memory, a random access memory, a static memory, a dynamic memory, a flash memory, and/or any device that stores digital information.

In some embodiments, other components 190 are components required to assist in the functional operation of electronic device 10. Taking a notebook computer as an example, the other components 190 can be, for example, a motherboard, a cooling fan, a display card, a sound card, a wireless chip, a hard disk, a display, a user interface, or any combination thereof. However, the present invention is not limited thereto. In some embodiments, in addition to being a notebook computer, the electronic device 10 may also be a device such as a tablet computer, a smart phone, a digital camera, a work machine, a server, or a medical instrument.

In the above, the present invention also provides a method for measuring the battery power corresponding to the temperature, and the method for measuring the battery power corresponding to the temperature includes detecting the temperature of the battery module of the electronic device according to a predetermined condition, and if the temperature satisfies the predetermined condition Detecting the internal resistance of the battery module and estimating the battery power of the battery module according to the internal resistance, and detecting the voltage and output current of the battery module if the temperature does not satisfy the predetermined condition, and generating the battery module according to the temperature, the voltage and the output current. The battery level of the group.

In some embodiments, the method for measuring the battery power corresponding to the temperature according to the present invention can be implemented by a computer program product, so that any electronic device having the battery module can be loaded and executed after execution of any of the present invention. A method of measuring the amount of battery power corresponding to temperature of an embodiment. In some embodiments, the computer program product can be a readable recording medium, and the program is stored in a readable recording medium for loading by the electronic device. In some embodiments, the program itself may be a computer program product and transmitted to the electronic device via a wired or wireless means.

In summary, the battery power meter corresponding to the temperature according to an embodiment of the present invention The method and the electronic device thereof can be applied to an electronic device, so that the electronic device uses a hybrid battery algorithm to estimate the residual power of the battery module, so that the residual power of the battery module can be accurately provided at a low temperature, thereby avoiding electrons. The device is prone to malfunction due to battery information error or/and avoids an electronic device with no warning power-off shutdown event.

S210 Detects the temperature of the battery module according to the predetermined condition S212. Measure the temperature of the battery module. S214 Check whether the received temperature S220 meets the specified conditions according to the established conditions. S230 Detects the internal resistance of the battery module S240. Estimate the battery capacity of the battery module S250 Detect the voltage and current of the battery module S260 Estimate the battery power of the battery module based on temperature, voltage and current S270 Display the power percentage on the display unit according to the battery power

Claims (8)

A method for measuring a battery power corresponding to a temperature is applied to an electronic device, the measuring method comprising: detecting a temperature of a battery module of the electronic device according to a temperature threshold; if the temperature is greater than the temperature threshold, detecting the Detecting an internal resistance of the battery module and estimating a battery power of the battery module according to the internal resistance; if the temperature is less than or equal to the temperature threshold, detecting a voltage and an output current of the battery module according to the temperature, the voltage, and the The output current generates the battery power of the battery module, wherein the step of generating the battery power of the battery module according to the temperature, the voltage, and the output current comprises using a voltage and a battery power based on different temperatures and different output currents. The corresponding curve generates the battery power corresponding to the temperature, the voltage and the output current; and displays a percentage of the power indicating the battery power on the display unit according to the battery power. The method for measuring the battery power corresponding to the temperature according to claim 1, wherein the step of detecting the temperature of the battery module of the electronic device according to the temperature threshold comprises: measuring the temperature of the battery module; Than this temperature threshold and the temperature. The method for measuring the battery power corresponding to the temperature according to claim 1, wherein the step of estimating the battery power of the battery module according to the internal resistance comprises: estimating the battery module by using the internal algorithm by using a conventional algorithm The battery level. The method for measuring the battery power corresponding to the temperature according to claim 1, before detecting the temperature of the battery module of the electronic device according to the temperature threshold, further comprising: The discharge test is performed by using a plurality of battery modules of the same factory condition as the battery module to establish a corresponding curve of the voltage and the battery power based on different temperatures and different output currents. The method for measuring the battery power corresponding to the temperature according to claim 1, before measuring the temperature of the battery module of the electronic device according to the temperature threshold, further comprising: performing a plurality of discharge tests by using the battery module to establish The corresponding curve of the voltage based on different temperatures and different output currents and the battery power. The method for measuring a battery power corresponding to temperature according to claim 1, wherein the step of generating the battery power of the battery module according to the temperature, the voltage, and the output current comprises: utilizing the different temperature and different output currents The corresponding curve of the voltage and the battery power is generated by interpolation. An electronic device corresponding to a temperature measuring battery power, comprising: a battery module for supplying power required for operation of the electronic device; a temperature sensing unit for measuring a temperature of the battery module; and a storage unit for storing a temperature a threshold value and a corresponding curve based on voltages of different temperatures and different output currents and battery power; a processing unit coupled to the battery module, the temperature sensing unit and the storage unit to receive the temperature; wherein, if the temperature is greater than The processing unit detects an internal resistance of the battery module and estimates a battery level of the battery module according to the internal resistance; wherein, if the temperature is less than or equal to the temperature threshold, the processing unit detects the battery module Group of voltages and output currents and utilize the voltage and battery based on different temperatures and different output currents The corresponding curve of the electric quantity generates the battery quantity corresponding to the temperature, the voltage and the output current of the battery module; and a display unit coupled to the processing unit to display a percentage of power indicating the battery power. The electronic device corresponding to the temperature measuring battery power according to claim 7, wherein the storage unit further stores a conventional algorithm, and when the temperature is greater than the temperature threshold, the processing unit utilizes the conventional algorithm. The battery level of the battery module is estimated by the internal resistance.