[0026] Hereinafter, the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments. It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other if there is no conflict.
[0027] figure 1 Is a flowchart of a method for calculating battery power according to an embodiment of the present invention, such as figure 1 As shown, the method mainly includes the following steps (step S102-step S104):
[0028] Step S102: Obtain preset discharge data of the battery corresponding to the current working state of the terminal, where different working states of the terminal correspond to different discharge data, and the discharge data records the correspondence between the voltage and the battery power;
[0029] Step S104: Obtain the current voltage of the battery of the terminal, and calculate the current power of the battery according to the corresponding relationship between the current voltage and the discharge data record.
[0030] Preferably, before step S102, presetting battery discharge data corresponding to the current working state of the terminal includes: selecting a fixed working current in each working state as the working state according to multiple working states of the terminal Discharge current; In each working state, test the corresponding voltage when the battery working in this working state reaches multiple predetermined battery power when discharged under the condition of fully charged according to the discharge current in the working state; The voltages corresponding to multiple predetermined battery power levels in each working state and the corresponding relationship between each voltage and its corresponding battery power level are stored as discharge data.
[0031] Among them, selecting the working current in each working state as the discharging current in the working state according to the multiple working states of the terminal includes: counting the multiple working currents of the terminal in each working state; among the multiple working currents The working current with the longest working time is selected as the fixed working current in this working state.
[0032] In step S102, obtaining preset battery discharge data corresponding to the current working state of the terminal includes: determining the current working state of the terminal; according to the correspondence between the preset working state and the discharge data in the working state Select the discharge data corresponding to the current working state from the stored discharge data.
[0033] In step S104, the current voltage of the battery of the terminal is obtained, and the current power of the battery is calculated according to the corresponding relationship between the current voltage and the discharge data record, including: obtaining the current voltage of the terminal and determining the two adjacent to the current voltage recorded in the discharge data. A voltage value; the current battery power is calculated according to the corresponding relationship between the two adjacent voltage values and the voltage recorded in the discharge data and the battery power.
[0034] Combine below figure 2 , image 3 , Figure 4 And the following examples describe the above method in detail.
[0035] In practical applications, you can first set the method and standard for testing battery discharge. For a particular mobile phone battery, during the discharge process, its voltage and discharge capacity meet a certain ratio. For a fully charged battery, its voltage value will decrease as the amount of discharge increases. According to the detected discharge curve of the battery, the voltage can be used to identify the current value of the battery. Through the voltage change of the battery in the complete discharge process, the change of the battery power value can be reflected, and then by converting the power into a percentage, the current power value can be displayed to the user simply and clearly.
[0036] For example, for a lithium-ion battery with a nominal capacity of 1000mAH, by performing a complete charge and discharge test on the battery with a battery tester (such as MACCOR battery performance tester), a more ideal battery discharge curve can be obtained (the abscissa is The discharge capacity, the ordinate is the voltage value).
[0037] Please refer to figure 2 , figure 2 It is a schematic diagram of the corresponding relationship between battery voltage and battery power according to an embodiment of the present invention, such as figure 2 As shown, it is: the discharge curve of a lithium-ion battery with a nominal capacity of 1000mAH, a nominal voltage of 3.7V, and a charge limit voltage of 4.2V. For the rigorous and scientific test, figure 1 The discharge curve shown is the discharge curve obtained after 10 cycles of charging and discharging tests, the adopted discharge voltage range is 4.2V---3.0V, and the discharge current is 600mA. by figure 1 It can be seen that the relationship curve between the discharge voltage and the discharged capacity of the same battery in the same discharge state is very similar. The battery begins to discharge at 4.2V, the voltage drops slowly, and the power steadily rises. When it reaches around 3.4V, the voltage drops sharply. At this time, the power is almost exhausted and reaches 3.0V. It can be considered that the discharge is over. During the entire discharge process, A 1000mAH battery discharges about 1034mAH of power between 4.200V and 2.940V.
[0038] With reference to the battery capacity, the X power can be divided into four equal parts, taking 25%, 50%, and 75% power values. In addition, you can set the point at which the voltage curve begins to drop rapidly to the 5% power point (this point Is the turning point of the curve, at figure 1 In, this point is 3.43V). The four points perpendicular to the X axis and the curve intersection point A, B, C, D, according to the corresponding relationship between voltage and power, the voltage values corresponding to A, B, C, and D correspond to 75%, 50%, and 25%, respectively. 5% power value. Connecting two adjacent points, the voltage and electricity are in a proportional relationship. Connecting two points A and B, when the voltage is between points A and B, the electricity and voltage have a linear relationship. Therefore, as long as the battery voltage is detected, the percentage value of the power can be clearly obtained. Five key critical points can be defined in the electric quantity to create a voltage-electricity relation table. The relation table between battery voltage and electric quantity percentage (Table 1) is:
[0039] Table 1
[0040] Voltage
[0041] It can be seen from the discharge curve that between the two voltage points, the power and the voltage can be roughly proportional to the relationship. The battery power between the critical points is calculated using a differential algorithm: for example, the voltage X is at the voltages A and B. When between, the power of point A is set to Q1, the voltage value of point B is set to Q2, then the power percentage value Q of point X is equal to:
[0042] Q=Q2+(X-B)×((A-B)/(Q1-Q2)). According to this algorithm, the remaining battery power at any battery voltage point of the battery can be obtained.
[0043] At the same time, from the analysis of the actual characteristics of the battery, during the discharge process, the voltage of the battery is closely related to the discharge current. For the same battery, in the case of different constant current discharge currents, the relationship between voltage and power is quite different. The greater the discharge current, the lower the battery voltage is at the same percentage of remaining power.
[0044] According to the above analysis, a higher-precision battery voltage-electricity data model can be created. For the use state of the mobile terminal, the working current of the terminal in four typical working states can be counted:
[0045] Standby: 10mA, normal use: 150mA, 2G network communication: 250mA, 3G network communication: 450mA.
[0046] According to the four typical working states, the typical working currents of 10mA, 150mA, 250mA, 450mA are selected as the discharge currents to test the discharge curves of the mobile terminal's battery when it is fully charged.
[0047] Please refer to image 3 , image 3 It is a schematic diagram of the corresponding relationship curve between the battery voltage and the battery power in multiple working modes of the terminal according to an embodiment of the present invention, such as image 3 As shown, the four curves from top to bottom are the relationship curves of the voltage and electricity of constant current discharge of 10mA, 150mA, 250mA, 450mA, from image 3 It can be clearly seen that: the same battery, different discharge current, the battery discharge curve has obvious differences, this difference is an important reason for the large data error introduced by the single curve model.
[0048] Based on the above analysis, starting from actual needs and referring to the data tested in the experiment, mathematical models of different discharge currents can be created, such as image 3 As shown, according to the four curves, the test creates four data structure models for reference:
[0049]
[0050]
[0051] It should be noted that different current usage states have their own data model of the relationship between power and voltage, which can be used as a backup for subsequent data processing. Here, the data recorded in the previous test needs to be stored in the memory. Since the amount of data is not large, it can be directly stored in the FLASH of the system data storage considering the convenience of data recall.
[0052] According to the current state of the mobile phone, determine which appropriate discharge curve is used by the current mobile phone, select the appropriate discharge data, and calculate the accurate current power value.
[0053] Figure 4 Is a flow chart for calculating battery power according to a preferred embodiment of the present invention, such as Figure 4 As shown, the process includes the following steps:
[0054] S401: Judge the current working state of the terminal;
[0055] S402, if it is in the sleep state, execute S406, otherwise, execute S403;
[0056] S403: Judge whether the current working state of the terminal is the 2G communication state, if yes, execute S406, otherwise, execute S404;
[0057] S404: Determine whether the current working state of the terminal is the 3G communication state, if yes, execute S406, otherwise, execute S405;
[0058] S405: Determine whether the current working state of the terminal is a normal state, if it is, execute S406, otherwise, do not execute;
[0059] S406: Calculate the battery power using pre-obtained laboratory test data and curve data list numbers as reference data;
[0060] S407, update the battery level.
[0061] Specifically, the foregoing process can be described with an example. For example, after the mobile phone is turned on, it stays in the normal operating state. The mobile phone judges that the mobile phone is in the actual state of normal use by judging the current use current or the detection of the mobile phone application state. When calculating the battery power, select the normal use discharge curve data Capacity VS Voltage 150mA[], please refer to figure 2 Example of calculating the current power: Assuming that the current voltage falls between voltage A and voltage B, the current power Q is:
[0062] Q=Q2+(X-B)×((A-B)/(Q1-Q2));
[0063] In this formula, Q1 is the power at point A of the 150mA discharge curve, Q2 is the power at point B of the 150mA discharge curve, A is the battery voltage at 75%, and B is the battery voltage at 50%.
[0064] If the mobile phone has been in this normal state, use the curve data of Capacity VS Voltage 150mA[] to calculate the battery power stably.
[0065] When the mobile phone starts to make a 2G call, the power consumption of the mobile phone will increase, and the current or the current state of the mobile phone will be detected. When calculating the battery power, the relationship curve between power and voltage will be updated. The mobile phone changes the state to the curve of 2G communication, judges the power according to the current voltage, and obtains a new power value. The curve used is corrected to Capacity VS Voltage250mA[].
[0066] Q’=Q2’+(X-B’)×((A’-B’)/(Q1’-Q2’));
[0067] In this formula, Q'is the current electricity, Q1' is the electricity at point A'of the 250mA discharge curve, Q2' is the electricity at point B'of the 250mA discharge curve, A'is the battery voltage at 75%, and B'is 50% Battery voltage at time.
[0068] Compare Q'with Q, and gradually shift the displayed power value from Q to Q', thereby correcting the real power value. By changing the state or current, a more accurate discharge curve is adopted to make the real-time power value of the mobile terminal closer to the accurate value, so as to achieve the purpose of improving power accuracy.
[0069] The battery power calculation method provided by the above embodiments can focus on the physical properties of the battery itself, analyze the chemical characteristics of the battery, and use a specific current state to determine the relationship between battery discharge and voltage, and then create multiple data models from multiple perspectives Analyze and calculate the current power of the battery, thereby greatly improving the accuracy of power calculation and improving user experience.
[0070] Figure 5 It is a structural block diagram of a battery power calculation device according to an embodiment of the present invention, which is used to implement the battery power calculation method provided in the foregoing embodiment. Such as Figure 5 As shown, the device for calculating the battery power includes: an acquisition module and a calculation module. Wherein, the acquiring module 10 is configured to acquire preset discharge data of the battery corresponding to the current working state of the terminal, where different working states of the terminal correspond to different discharge data, and the discharge data records the corresponding relationship between the voltage and the battery power; The calculation module 20 is connected to the acquisition module 10 to obtain the current voltage of the battery of the terminal, and calculate the current power of the battery according to the corresponding relationship between the current voltage and the discharge data record.
[0071] Image 6 It is a structural block diagram of a battery power calculation device according to a preferred embodiment of the present invention, such as Image 6 As shown, the acquisition module 10 may include: a judging unit 12 for judging the current working state of the terminal; a selecting unit 14, connected to the judging unit 12, for calculating according to the preset working state and the discharge data in the working state The correspondence relationship selects the discharge data corresponding to the current working state from the stored discharge data.
[0072] Preferably, the calculation module 20 may include: a determination unit 22, configured to obtain the current voltage of the terminal, and determine two voltage values adjacent to the current voltage recorded in the discharge data; and the calculation unit 24, connected to the determining unit 22, configured to The current battery power is calculated according to the two adjacent voltage values and the corresponding relationship between the voltage recorded in the discharge data and the battery power.
[0073] Preferably, the battery power calculation device may further include: a setting module 30 for presetting battery discharge data corresponding to the current working state of the terminal; wherein, the setting module 30 may include: a selection unit 32 , Used to select the fixed working current in each working state as the discharge current in the working state according to the multiple working states of the terminal; the test unit 34, connected to the selecting unit 32, is used for each working state, According to the discharge current in the working state, the battery working in the working state is tested to the voltage corresponding to a plurality of predetermined battery power levels when discharged when fully charged; the storage unit 36 is connected to the test unit 34 for The voltage corresponding to the plurality of predetermined battery power levels in each working state and the corresponding relationship between each voltage and the corresponding battery power level are stored as discharge data.
[0074] Using the battery power calculation device provided in the foregoing embodiment can obtain a more accurate battery power, thereby providing users with a better user experience.
[0075] Figure 7 Is a schematic structural diagram of a terminal according to an embodiment of the present invention, such as Figure 7 As shown, the terminal 70 includes a terminal body 72 and a battery (not shown in the figure). The terminal body 72 includes the battery power calculation device provided in the above-mentioned embodiment.
[0076] With the terminal provided in the foregoing embodiment, a more accurate battery power can be obtained, thereby providing users with a better user experience.
[0077] From the above description, it can be seen that the present invention achieves the following technical effects: it can focus on the physical properties of the battery itself, analyze the chemical characteristics of the battery, and use a specific current state to determine the relationship between battery discharge and voltage, and then create The multiple data model analyzes and calculates the current power of the battery from multiple angles, which can greatly improve the accuracy of the power and improve the user experience.
[0078] Obviously, those skilled in the art should understand that the above-mentioned modules or steps of the present invention can be implemented by a general computing device. They can be concentrated on a single computing device or distributed in a network composed of multiple computing devices. Above, alternatively, they can be implemented with program codes executable by the computing device, so that they can be stored in the storage device for execution by the computing device, and in some cases, can be executed in a different order than here. Perform the steps shown or described, or fabricate them into individual integrated circuit modules, or fabricate multiple modules or steps of them into a single integrated circuit module to achieve. In this way, the present invention is not limited to any specific combination of hardware and software.
[0079] The above are only preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc., made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
