TWI333289B - Charge capacity measuring method and system and electronic equipment using the same - Google Patents

Description

On June 30, 099, the company was selected for the first time. For the purpose of the invention, the invention relates to a method for detecting electricity, a power detecting system using the same, and an electronic device, in particular The invention relates to a method for detecting remaining power of a power supply device and a power detecting system and an electronic device using the same. [Prior Art] [0002] With the rapid development of technology, more and more electronic products are coming to market, such as mobile phones, personal digital assistants (PDAs) and laptops. Typically, these electronics are battery powered, especially rechargeable batteries. The remaining power of the battery has a great impact on the work of each electronic product. J: Because Jt, the rut is in the electronic product industry. , -1· , when it is necessary, it is necessary to praise the remaining electricity of the battery. [0003] There are two main methods for detecting the remaining battery power: one is the current integration algorithm; the other is the voltage measurement method. The current integration algorithm is based on current integration and uses the memory to store the battery. The value, in a predetermined refresh cycle, the charge of the rechargeable battery / ' · . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The remaining charge value is calculated based on the total charge value... and the charge/discharge power value. The voltage measurement method is based on voltage measurement, and is measured before the electronic product is shipped from the factory, and the correspondence table between the voltage value of the rechargeable battery and the remaining power value in the electronic product is stored in the memory of the electronic product. In use, by detecting the voltage value between the two poles of the rechargeable battery, and querying the correspondence table between the voltage value and the remaining power value, the remaining power value of the rechargeable battery is obtained. [0004] In the current integration algorithm, when the battery is not working for a long time, the self-discharge phenomenon caused by the internal chemical reaction of the battery causes the actual battery value of the rechargeable battery to be recorded with 095136401 Form No. A0101 Page 3/20 pages 0993232635-0 1333289 099 On June 30th, the value of the total electricity stored in the page was different, which led to a large error in the calculated residual power value. [0005] In the voltage measurement method, there is a simple correspondence between the battery voltage value and the remaining power value only in the case where the battery is not connected to any load and is a new battery. When the battery is connected to the load, the voltage at the two poles of the battery will cause a detection error due to the voltage drop caused by its internal impedance. When the battery is used for a period of time to cause aging, the correspondence between the battery voltage value and the remaining power also changes, and the voltage value of the battery also changes with temperature. SUMMARY OF THE INVENTION [0006] In view of this, it is necessary to propose an accurate power detecting method. [0007] At the same time, an accurate power detection system is provided. In addition, an electronic device that accurately detects a power amount is also provided. [0009] A method for detecting a power quantity, comprising the following steps: [0010] measuring an initial voltage value of the power supply device; [0011] querying a correspondence table between the voltage value and the remaining power value according to the initial voltage value, and obtaining an initial remaining power value of the power supply device [0012] accumulating the charge/discharge current flowing through the power supply device to obtain a charge/discharge power value; and [0013] calculating a current remaining power value of the power supply device according to the initial remaining power value and the charge/discharge power value . [0014] A power detection system comprising:

095136401 Form No. A0101 Page 4 / Total 20 Page 0993232635-0 Correction Replacement Page 1333289 of June 30, 2017 [0015] The data storage module is used to store a correspondence table between the voltage value of the power supply device and the remaining power value; [0016] a current integration unit for accumulating the charge/discharge current flowing through the power supply device to obtain a charge/discharge power value; [0017] a voltage measurement unit for measuring a voltage value of the power supply device; [0018] query unit, Querying a correspondence table between the voltage value and the remaining power value in the data storage module according to the voltage value measured by the voltage measuring unit, to obtain an initial remaining power value of the power supply device; and [0019] a data calculating unit, configured to The initial remaining power value and the current integrating unit are integrated to obtain a charging/discharging power source - the current remaining power value of the device. [0020] An electronic device, comprising: [0021] a power supply device for storing and providing power; [0022] an internal load, including a work unit and a display unit; and Φ [0023] a power detection system for detecting the The remaining power of the power supply; the power detection system includes: [0024] a data storage module for storing a correspondence table between the voltage value of the power supply device and the remaining power value; [0025] a current integration unit for integrating the flow The charging/discharging current of the power supply device [0026] [0027] The voltage measuring unit is configured to measure the voltage value of the power supply device; the query unit is configured to query the voltage value and the remaining power value according to the voltage value to the 095136401 form number Α 0101 Page 5 of 20 pages 0993232635-0 1333289 _ June 30, 2017, the replacement page should be related to the table to obtain the initial remaining power value; and [0028] the data calculation unit for the initial remaining power value and the The charge/discharge power value calculated by the current integration unit calculates the current remaining power value of the power supply device. [0029] The electric quantity detecting method, the electric quantity detecting system and the electronic device using the method, determine the electric quantity value of the integral starting time by measuring the voltage search electric quantity relationship table, thereby avoiding the change of the electric quantity value of the integral starting time due to self-discharge The error is generated, thereby improving the detection accuracy of the remaining power of the power supply device. [Embodiment] Referring to Fig. 1, a power supply device 20 is connected to a charging farm 10, a load 30, and a power detecting system 4. The charging device 10 may be an AC charger or a DC charger for use as a power supply device. The charging device 20 can be a rechargeable battery for storing and supplying power or power to the load 30. The power detecting system 4 is configured to detect the remaining power of the power supply device 20. [0031] The power detecting system 4 includes a detecting module 41. The processing module 42, the residual material storage module 43 and the display module 44. wherein Q represents the original remaining power value of the power supply device 20 when the power detecting system is working in the original 4, and the remaining power is indicated. The current remaining power value of the device 20. [0032] The Qβ detection module 41 is configured to detect the original remaining original power value of the power supply device 20 at the integration start time. The Q# processing module 42 is configured to process the current remaining power of the power supply device 20. The data storage module 43 can be a general readable and writable memory for storing the remaining power value 431 of the power supply device 20 and the two-pole open circuit voltage value of the power supply device 20 095136401 Form No. A0101 Page 6 of 20 0993232635-0 1333289 Correction of the replacement page and the remaining charge value table 432 (hereinafter referred to as the voltage and electricity relationship table) on June 30, 099, wherein the type of the remaining charge value in the voltage charge relationship table includes at least one of a specific value and a percentage value. The open circuit voltage value and the remaining charge value of the voltage and power relationship table can be updated. For ease of understanding, the following is a description of the voltage and electricity relationship table when discharging at normal temperature (20 °C) and constant current (55OmA), as shown in Table 1. This (limited to space, this table only lists some correspondences [0034] Table 1 Normal temperature constant current discharge voltage and electricity relationship table open circuit voltage value (V) 4.20 4.06 3.98 3.92 3.87 3.82 3.79 3.77 3.74 3.68 3.45 Remaining electricity value 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 5% Percentage

[0036] As can be seen from Table 1, the power supply device 20 is powered on: as the remaining power consumption value decreases by 〆: .τ gradually decreases, so that the remaining power value can be determined according to the power supply device; [0037] The display module 44 may be a liquid crystal display (LCD) or a digital indicator for displaying the remaining power value of the power supply device 20 and the prompt information of the battery power. [0038] The detection module 41 includes a voltage measurement unit 411, a voltage temperature compensation unit element 412, and an inquiry unit 413. [0039] The voltage measurement unit 411 may be a multi-element voltmeter for measuring the power supply device 095136401 Form No. A0101 Page 7 of 20 0993232635-0 1333289 _ 0" On June 3rd, the Japanese is replacing the two pole voltage of the Lu 20. [0040] The voltage temperature compensation unit 412 is used to sense the temperature of the power supply device 20 and measure the voltage The voltage measured by the unit 411 is temperature compensated. The voltage temperature compensation unit 412 can sense the temperature of the power supply device 20 by a thermistor or an electronic thermometer, and utilize the variation law of the temperature difference in the relationship between the feedback temperature and the voltage power. The measured voltage value is compensated, and the change rule is obtained by a preliminary experimental test. [0041] The query unit 41 3 is configured to query the voltage power relationship table according to the temperature compensated voltage value to obtain the current remaining power value of the power supply device 20. Q#. [0042] The processing module 42 includes a current integration unit 421, an operation state detection single residual element 422, a data calculation unit 423, and a data update list. 424. [0043] The current integration unit 421 may employ a current integrator to integrate the charge/discharge current of the power supply device 20 for a predetermined refresh period (T) to obtain a charge/discharge amount during the refresh period (T). The refresh cycle (T) is a preset integrated refresh time, and the current totalizer 421 accumulates a primary current every refresh cycle (T) time. The charge/discharge power accumulation formula of the refresh cycle (T) is: [0044] Q guess =J".'(〇[0045] where represents the value of the charge flowing in the refresh period (T), and the product of I(t) represents the change in the value of the current during the refresh period (T). 095136401 Form No. A0101 8 pages / total 20 pages 0993232635-0 1333289 June 30, 2017, the replacement of the page [0046] The working state detecting unit 422 is used to detect the operating state of the power supply device 20, that is, the charging state or the power state. When the current is in the opposite direction, the power supply device 20 can be judged to be in a charging or power state according to the current direction.

[0047] The data calculation unit 423 may be a general digital processor or a digital operation circuit for querying the original remaining power value of the power supply device 20 according to the query unit 413, and the refresh cycle (T original) calculated by the current integration unit 421. The amount of electricity flowing through (^, the current remaining capacity of the power supply device 20 is calculated

[0050] [0050] When charging, when the calculation formula is used, the calculation formula is left.

[0052] [0052]

Q = Q - Q 乂 乂 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 The voltage in the 3 is the relationship between the voltage value and the remaining power value in the table. [0053] The power detecting system 4 stores the capacity value of the power supply device 20 and the voltage power relationship table by the data storage module 43. The charge voltage relationship table is updated by the data update unit 42 during charging. When the power is used, the voltage unit relationship table is queried by the query unit 150 to determine the starting time electric quantity value Qs of the current integral. Original [0054] The electric quantity detecting system 4 determines the current integral 095136401 by querying the voltage electric quantity relationship table. Form No. A0101 Page 9 / Total 20 pages 0993232635-0 1333289 [0056] [0059] [0059] 095136401 On June 30, 099, Junzheng replaced the page start time electric quantity value to avoid the circuit partial pressure generated by the internal impedance of the power supply device 2 () and the self-discharge phenomenon inside the power supply device 2G, resulting in electrical losses. Detection error. In addition, the voltage temperature compensation unit 412 performs temperature compensation on the measured voltage to prevent a voltage measurement error caused by the temperature change of the power supply device 20 when operating, and by updating the voltage value and the remaining power value in the voltage relationship table. The corresponding relationship prevents the detection error caused by the change of the relationship between the voltage value and the remaining power value caused by the aging of the power supply device 2, and improves the power detection accuracy. Referring to FIG. 2, the electronic device 5 is connected to the charging device 1A. The electronic device 5 includes a power supply device 20, an internal load 3i, and a power detector. The internal load 31 further includes a work unit 32 for converting the electrical energy of the charging device into other forms of energy and a display unit 33 for displaying the remaining power of the power supply device, wherein the display unit 33 is powered by the power supply device 20. Referring to FIG. 1 and FIG. 3, FIG. 3 is a flowchart of a method for detecting a power quantity based on the power detecting system 4, wherein the power detecting system 4 is pre-configured with a voltage and power relationship table. The power detecting method includes the following steps: Step 102: First, Measuring the power supply device 2 〇 two-pole open circuit voltage value to obtain the remaining power value U. In the original step 104, the open circuit voltage value measured by the voltage measuring unit 411 is temperature compensated to obtain the compensated voltage value U. Step 106: Query the voltage power relationship table in the data storage module 43 according to the voltage value compensated by the voltage temperature compensation unit 412 to obtain the original remaining power value q of the power supply device 20. Original Form No. A0101 Page 10 / Total 20 Pages 0993232635-0 1333289 · , [0060] On June 30, 099, the replacement page is replaced by step 108 to accumulate the current flowing through the refresh period (T) of the power supply device 20 to The electric quantity value Qu flowing in the refresh period (T) is obtained. Bar [0061] Step 110, detecting an operating state of the power supply device 20, the working state including a charging state and a power state. If it is in the power state, step 112 is performed; if it is in the charging state, step 114 is performed.

[0062] Step 112: Calculate the current remaining power value of the power supply device 20 according to the formula: product _vv% [0064] according to the original remaining electric quantity Qs of the power supply device 20 and the electric quantity value Q flowing in the refresh period (T original). After step 112 is completed, the step is performed, and step 122 is performed. — J Today one by one

[0065] Step 114: Calculate the current remaining capacity of the power supply device 2 by the formula: bar [_ WQ product [0067] according to the original remaining amount of the power supply device 20 and the quantity of the electric quantity Q flowing through the quantity refresh period (T original - ) The value (i & [0068] Step 116, when the power supply device 20 is measured, the two-pole open circuit voltage value of the power supply remaining device 20 is obtained. [0069] Step 118, the open circuit voltage measured by the voltage measuring unit 411 The value U& performs temperature compensation to obtain Us. [0070] Step 120, according to the voltage value compensated by the voltage temperature compensation unit 412 and the current remaining power value of the power supply device 20 to update the voltage power relationship table [0071] Step 122, display power supply Device 20 current remaining power value Q& 095136401 Form No. A0101 Page 11 of 20 0993232635-0 1333289 099 June 30曰Replacement page [0072] The above-mentioned power detection method, by querying the voltage and electricity relationship table The current value of the current integration start time is determined, and the voltage division due to the internal impedance of the power supply device 20 and the self-discharge phenomenon inside the power supply device 20 are avoided. In addition, the voltage temperature compensation unit 412 performs temperature compensation on the measured voltage to prevent voltage measurement errors caused by temperature changes during operation of the power supply device 20. By updating the voltage value in the voltage quantity relationship table and The corresponding relationship between the remaining power values prevents the detection error caused by the change of the relationship between the voltage value and the remaining power value caused by the aging of the power supply device 20, and improves the power detection accuracy. [0073] The remaining power of the power supply device is instantaneous The detection system and method can be applied to various battery-powered electronic products, such as mobile phones, PDAs, notebook computers, etc. [Schematic Description] [0074] FIG. 1 is a block diagram of a power detecting system of a preferred embodiment. 2 is a block diagram of an electronic device using a power detecting system according to a preferred embodiment. [0076] FIG. 3 is a flow chart of a method for detecting a power amount according to a preferred embodiment. [Description of Main Components] [0077] Charging device: 1 0 [0078] Voltage measuring unit: 41 1 [0079] Power supply unit: 20 [0080] Voltage temperature compensation unit: 412 095136401 Single No. A0101 Page 12 of 20 0993232635-0 [0081] [0081] 1333289 Correction Replacement ΐΓ on June 30, 099 |

[0086] [0086] [0098] [0098] [0098] [0098] [0098] [0098] ]

Load: 30 Query unit: 413 Power detection system: 4 Current integration unit: 421 Q κ detection module: 41 Original working status detection unit: 422 Q& Processing module: 42 Remaining data calculation unit: 423 Data storage module: 43 Data update unit: 424 Display module: 4 4 Remaining power value: 431 Correspondence between voltage value and remaining power value ΐ32 V , ' ; : ' "V: Internal load: 31 Working unit: 32 Battery detection system: 50 display Unit: 33 Steps for the power detection method: 102-122 095136401 Form No. A0101 Page 13 of 20 0993232635-0

Claims (1)

1333289 Please patent scope · June 30, 099 ammonium positive 1. A method for detecting electricity, including the following steps: measuring the open circuit voltage value of the power supply device; querying the correspondence table between the open circuit voltage value and the remaining power value according to the open circuit voltage value, obtaining the The remaining power value of the power supply device; the charge/discharge current flowing through the power supply device is integrated, and the charge/discharge power value is obtained, and the current remaining power value of the power supply device is calculated according to the remaining power value and the charge/discharge power value. 2. The method for detecting a quantity of electricity according to claim 1, wherein the method for detecting the amount of electricity further comprises the steps of: detecting whether the operating state of the power supply device is in a charging state or a power state; and if in the charging state, measuring the current state The current voltage value of the power supply device corresponding to the remaining power value is updated, and the voltage value and the remaining power value corresponding to the voltage value and the remaining power value are updated according to the current remaining power value and the current voltage value. 3. The method for detecting a quantity of electricity according to claim 1, wherein the method for detecting a quantity of electricity further comprises the step of temperature-compensating the measured voltage value of the power supply unit, and the correspondence between the value of the inquiry voltage and the remaining quantity of electricity The query is based on the temperature compensated voltage value. 4. The method of detecting electric quantity according to claim 1, wherein the electric quantity detecting method further comprises the step of displaying a current remaining electric quantity value of the electric power supply unit. 5. The method for detecting electric quantity according to item 1 of the patent application scope, wherein the electric quantity value in the correspondence table between the electric quantity value and the remaining electric quantity value comprises a specific value or a hundred 095136401 form number A0101 page 14 / total 20 pages 0993232635-0 1333289, 'At least one of the revised page scores was revised on June 30, 099. The method of detecting electricity according to claim 1, wherein the power supply device is a rechargeable battery. A power quantity detecting system, comprising: a data storage module, configured to store a correspondence table between an open circuit voltage value and a remaining power value of the power supply device; and a current integration unit configured to calculate a charge/discharge current flowing through the power supply device to obtain a charge The electric discharge detecting system further includes: a voltage measuring unit configured to measure an open circuit voltage value of the power supply device; and a query unit configured to: according to the voltage measurement: a special wash and a meditation, which: open circuit The value of the voltage is checked, and the data is calculated in the data storage module. The remaining t5 of the power supply device is obtained, and the data calculation unit is used to calculate the remaining power. The value and the current integration unit calculate the charge/discharge power value to calculate the current residual power _f | ^ • - ::% . ·. ^ value of the power supply device. I , : The K-quantity inspection f system described in claim 7 of the patent scope, wherein the power*'" ν_ Λ S «' detection system further includes: a working state inspection unit for detecting the operation of the power supply device a state, the working state includes a state of charge and a state of power, such as the power detecting system of claim 7, wherein the power detecting system further comprises: a data updating unit, the data updating when the powering device is in a charging state The unit updates the correspondence between the voltage value and the remaining power value in the correspondence table between the voltage value and the remaining power value according to the current remaining power value and the voltage value corresponding to the current power value. Ίο · The power detection system described in item 7 of the patent application, wherein the power 095136401 Form No. 1010101 Page 15 / Total 20 Page 0993232635-0 1333289 — One, — •-- June 30, 2017 The page detection system further includes a voltage temperature compensation unit for compensating the voltage value measured by the voltage measurement unit, and the query unit queries the correspondence table of the voltage value and the remaining power value according to the compensated voltage value. 11. The power detection system of claim 7, wherein the power detection system further comprises a display module for displaying a current remaining power value of the power supply device. 12. The electric quantity detecting system according to claim 7, wherein the electric quantity value in the correspondence table of the electric quantity value and the remaining electric quantity value includes at least one of a specific value or a percentage. 13. The power detection system of claim 7, wherein the power supply 1 device is a rechargeable battery. An electronic device comprising: a power supply device for storing and supplying power; an internal load including a work unit and a display unit; a power detection system for detecting a remaining power value of the power supply device; the power detection system The method includes: a data storage module, configured to store a correspondence table between an open circuit voltage value and a remaining power value of the power supply device; and a current integration unit configured to calculate a current flowing through the power supply device for charging/discharging. The measuring system further includes: a voltage measuring unit configured to measure an open circuit voltage value of the power supply device; and a query unit configured to query the correspondence table between the open circuit voltage value and the remaining power value according to the open circuit voltage value to obtain a remaining power value; The unit is configured to calculate the current remaining power of the power supply device according to the remaining power value and the charge/discharge power value calculated by the current integration unit. 095136401 Form No. A0101 Page 16/20 pages 0993232635-0 1333289 t ♦ 099 Corrected the replacement page value on June 30th. The electronic device of claim 14, wherein the power detecting system further comprises an operating state detecting unit, configured to detect an operating state of the power supply device, the working state including a charging state and a power state, such as The electronic device of claim 14, wherein the power detecting system further comprises a data updating unit, configured to: according to the current remaining power value and the voltage value corresponding to the current remaining power value when the power supply device is in a charging state And updating the correspondence between the voltage value and the remaining power value in the correspondence table between the voltage value and the remaining power value. The electronic device of claim 14, wherein the power detecting system further comprises a voltage temperature compensation unit for replenishing the voltage measurement. • Λκί*..·.... · 'ii v, «.«v-'.-a*·! ΐ. , -, The voltage value measured by the unit. The query unit queries the voltage value and the remaining power value according to the voltage value of the capture. Pair # relational table. The electronic device of claim 14, wherein the power supply device is a rechargeable battery. 19. The spent electronic device according to claim 14, wherein the electric quantity value in the correspondence table between the electric quantity value and the remaining electric quantity value comprises at least one of a specific value or a percentage. 095136401 Form No. A0101 Page 17 of 20 0993232635-0