WO2011140722A1 - Intelligent capacity measuring battery - Google Patents

Abstract

An intelligent capacity measuring battery is disclosed, wherein the battery includes a battery body(1) and a micro-electronic circuit(2) which is embedded on the battery body(1) and is connected between the positive electrode and the negative electrode of the battery body(1). The micro-electronic circuit(2) includes an executive module(21), a load(22), an electric quantity detection module(23), an interlocking controlling module(24) and a display module(25). Compared to the prior art, the intelligent capacity measuring battery may accurately show charge status of the battery by using a light-load precision voltage measure method and cooperating with the above technical scheme, and the display module(25)bases on the electric quantity to intelligently estimate and then shows the operations which should be made by a user, so as to bring the non-professional user to know the operation for the battery. Therefore, the common user can see the status of the battery by the simplest method, so as to maintain and use the battery reasonably, enhance the work efficiency of the battery, and extend the service life of the battery.

Description

Intelligent measuring capacity battery Technical field

 The invention relates to the field of batteries and electronics, in particular to an intelligent measuring capacity battery capable of accurately measuring battery capacity and directly displaying a user operation scheme according to battery capacity.

Background technique

In the prior art, there are generally two ways to detect the battery's power:

At present, some batteries use a physical method to test the battery capacity. The principle is to use a floating ball with a center of gravity offset. The specific gravity of the electrolyte is different at different capacities, and the buoyancy generated by the float is different, and the float is rotated. Knowing the battery capacity through the different colors of the rotating surface, the reliability and accuracy of this method are difficult to guarantee, and it is only suitable for liquid batteries.

The other is to use an external power detection device to test the battery, generally requires professional operation, and some need to take a long time to get the power data. The electrochemical performance of the battery is not the same. The electrochemical performance of the same battery is also different due to the difference in the production process of different manufacturers. This external measuring device has compatibility deviation, large volume, high cost and requires professional Problems such as personnel operations are difficult to popularize.

In the prior art, the display of the battery power is generally a numerical value or a figure or a color representing a numerical value, and the electronic parameters corresponding to the electrochemical parameters of the actual battery have certain limitations in the communication between the electrochemical engineer and the electronic engineer. The numerical values or the figures or colors representing the values often fail to provide accurate operation guidelines for most electrochemical engineers or electronic engineers. It is difficult for the average user to accurately perform the corresponding operations based on the above display results.

Summary of the invention

It is an object of the present invention to provide an intelligent volume measuring battery that can measure battery capacity in real time and accurately, and directly indicate an operating scheme.

The technical solution of the present invention is as follows: a smart capacitance measuring battery comprising a battery body and a microelectronic circuit mounted on the battery body and connected between the positive and negative electrodes of the battery body, the micro electronic circuit including an execution module, a load, a power detecting module, an interlocking control module, and a display module, wherein an input end of the executing module is connected to a positive end of the battery body, and an output end of the executing module is respectively connected to an input end of the power detecting module and one end of the load, The output end of the electric quantity detecting module is connected to the input end of the interlocking control module, the output end of the interlocking control module is connected to the input end of the display module, the other end of the load, the grounding end of the electric quantity detecting module, and the interlocking control The ground end of the module and the ground end of the display module are respectively connected to the negative end of the battery body.

The above execution module is a mechanical switch or an electronic switch.

The above load is a resistive or capacitive load or an inductive load.

The above-mentioned power detecting module employs an operational amplifier circuit or an AD conversion circuit, but is not limited to an operational amplifier circuit and an AD conversion circuit.

The above display module is an LED display circuit.

The above display module is an LCD display circuit.

After the above solution is adopted, when the user operates the execution module, the battery main body supplies power to the electric quantity detecting module and the display module through the execution module, and the load is turned on, and the electric quantity detecting module detects the electric quantity signal. The display module is reached by the interlock control module, and the corresponding battery power condition is displayed by the display module. After a long period of research, the applicant found that the light load voltage of the battery can accurately reflect the capacity of the battery. Therefore, the light load precision voltage detection method is designed according to the characteristic curve of the corresponding battery. Compared with the prior art, the present invention adopts the invention. The light-load precision voltage detection method, together with the above technical solution, can accurately reflect the current state of charge of the battery, and the display module intelligently judges according to the detected power, and displays the operations that the user needs to perform, so that the non-professional users can understand The battery should be operated. In this way, in the process of using the battery, the ordinary user can use the simplest method (only need to operate the execution module) to understand the condition of the battery in real time, accurately and intuitively, so that the battery can be properly maintained and used, and the work efficiency is improved. Extend the battery life.

The intelligent measuring and measuring battery of the invention adopts the light load precision voltage detecting method to design a small-sized micro electronic circuit, so that the battery has sufficient space to be embedded.

DRAWINGS

1 is a circuit block diagram of the present invention;

2 is a circuit schematic diagram of Embodiment 1 of the present invention;

3 is a schematic circuit diagram of a second embodiment of the present invention;

4 is a circuit schematic diagram of a third embodiment of the present invention.

detailed description

The smart capacitance measuring battery of the present invention, as shown in FIG. 1, includes a battery main body 1 and a microelectronic circuit 2 mounted on the battery main body 1 and connected between the positive and negative electrodes of the battery main body 1, and the micro electronic circuit 2 can be embedded in The top surface of the battery body 1 may be embedded in the other surface of the battery body 1.

The microelectronic circuit 2 includes an execution module 21, a load 22, a power detection module 23, an interlock control module 24, and a display module 25. The input end of the execution module 21 is connected to the positive terminal of the battery body 1, and the output terminals of the execution module 21 are respectively connected. At the input end of the power detecting module 23 and one end of the load 22, the output end of the power detecting module 23 is connected to the input end of the interlocking control module 24, and the output end of the interlocking control module 24 is connected to the input end of the display module 25, the load 22 The other end, the ground end of the power detecting module 23, the grounding end of the interlocking control module 24, and the grounding end of the display module 25 are respectively connected to the negative terminal of the battery body 1.

The execution module 21 can adopt a mechanical switch or an electronic switch, and the electronic switch can adopt a light control switch or other inductive switch.

The load 22 can be either a resistor or a capacitive or inductive load.

The power detecting module 23 may employ an operational amplifier circuit or an AD conversion circuit, but is not limited to an operational amplifier circuit and an AD conversion circuit.

The display module 25 can employ an LED display circuit or an LCD display circuit. The LED display circuit adopts a plurality of light-emitting diodes, and the corresponding characters or pictures indicated by the respective light-emitting diodes respectively emit light, and the user takes corresponding operations. Or through the content (text or picture) displayed on the LCD, the user takes the appropriate action.

According to the applicant's long-term research, it is found that the light load voltage of the battery can accurately reflect the capacity of the battery. Therefore, according to the characteristic curve of the corresponding battery, the following table shows the relationship between the light load voltage characteristics and the amount of electricity:

Numbering	Open circuit voltage	capacity
	V	%
1	13	100
2	12.9	92
3	12.8	81
4	12.7	70
5	12.6	58
6	12.5	46
7	12.45	40
8	12.4	35
9	12.3	20

From the above "light load voltage characteristics and power relationship table" can be seen, the table with the corresponding light load voltage value, can accurately reflect the current battery power, light load precision voltage detection method is in the battery connection less load When measuring the battery voltage with higher accuracy.

The general solution is difficult to ensure accurate and real-time measurement of the state of charge of the battery at different temperatures and states of charge. Based on this "light load voltage characteristic and electric quantity relationship table", the applicant designed a light load precision voltage detection method, which can accurately reflect the current charge of the battery by using the light load precision voltage detection method and the technical scheme of the present invention. The state, through the test of the ambient temperature of the battery, the power detection drift reaches the stability of the use effect, and the long-term tracking test of the plurality of batteries is verified, and the judgment accuracy is verified.

In operation, when the user operates the module 21, the battery body 1 supplies power to the microelectronic circuit 2 through the execution module 21, and the load 22 is turned on, and the power detecting module 23 passes the measured power signal through the interlock control module 24, Arriving at the display module 25, the display module 25 is provided with a unique state output of the user operation corresponding to a certain amount of power through the interlock control module 24, and the display module 25 is prevented from displaying two or more states, so that the display module 25 displays the corresponding state. Battery level. Since the microelectronic circuit 2 of the present invention combines the characteristics of light load and battery resistance or failure at the end of the battery, it can accurately judge the state of 'direct use', 'recommended charging' or 'must charge' of the battery, and is displayed by the display. The module 25 respectively displays or indicates the corresponding state, so that in the process of operating the battery, the user can use the simplest method (just operate the execution module) to understand the battery condition in real time, accurately and intuitively according to the prompt of the battery. Operation ('direct use', 'recommended charging' or 'must charge') to increase work efficiency and extend battery life.

Embodiment 1:

According to the first embodiment of the present invention, as shown in FIGS. 1 and 2, the execution module 21 adopts a mechanical switch S2. The load 22 adopts a light-load circuit composed of parallel resistors R9 and R10. At this time, by searching for the 'light load voltage characteristic and power relationship table', the threshold values of 'must charge', 'recommended charge', and 'direct use' can be determined. .

The power detecting module 23 and the interlocking control module 24 use a precision reference source circuit composed of a resistor R6 and a voltage stabilizing module U5, and a resistor R4, R5, R7, R8, and a comparator U1 (composed of U1A and U1B). Comparator circuit, the comparator output is 'line and' interlock. The comparator U1A is a 'required charging' voltage threshold detection. When the battery voltage is lower than the 'must charge' threshold, the voltage of the inverting input terminal connected to the resistors R7 and R8 is lower than the reference voltage connected to the non-inverting input terminal, the comparator U1A The output is 1, and the 'must charge' indicator (light-emitting diode DS1) lights up. When the battery voltage is higher than the 'must charge' threshold, but lower than the 'direct use' threshold, the comparator U1A inverting input voltage is higher than the non-inverting input voltage, the comparator U1A output is 0, the 'must charge' indicator The lock is 0. At this time, the voltage of the comparator U1B connected to the inverting input terminals of the resistors R4 and R5 is lower than the voltage of the non-inverting input terminal connected to the reference source, so the output of the comparator U1B is 1, the 'recommended charging' lamp (lighting) Diode DS2) lights up. When the battery voltage rises to the 'direct use' threshold level, the output of comparator U1B is 0, the 'recommended charging' light is turned off, and the 'direct use' indicator (light-emitting diode DS3) is illuminated.

The voltage division values of R7 and R8 determine the threshold voltage VA0 of 'must charge' and 'recommended charge'. When determining the reference voltages VREF and R7, R8 is calculated as follows:

R8=VREF*R7/(VA0-VREF)

Similarly, the voltage division values of R4 and R5 determine the threshold voltage VA1 of 'recommended charging' and 'direct use'. When determining the reference voltages VREF and R4, R5 is calculated as follows:

R5=VREF*R4/(VA1-VREF)

The display module 25 adopts an LED display circuit composed of the light-emitting diodes DS1-DS3 and the resistors R1-R3. When the battery power is set to a normal value, the light-emitting diode DS3 emits light, and the user can know the light-emitting diode DS3 according to the light-emitting diode DS3. The battery can be used directly; when the battery power is lower than the set normal value and higher than the set minimum value, the light-emitting diode DS2 emits light, and the user can know that the battery power is lower than the normal value according to the light-emitting diode DS2. It is recommended to charge the battery; when the battery power is lower than or equal to the set minimum value, the light-emitting diode DS1 emits light, and the user can know that the battery power is lower than or equal to the lowest set value according to the light-emitting diode DS1. The battery must be charged.

Example 2:

Embodiment 2 of the present invention, as shown in FIGS. 1 and 3, the execution module 21 employs a mechanical switch S1. The load 22 uses the resistor R15 as a light-load circuit. At this time, by searching for the 'light load voltage characteristic and the power relationship table', the threshold values such as 'must charge', 'recommended charge', and 'direct use' can be determined.

The power detecting module 23 adopts a precision reference source circuit composed of resistors R12 and R20, voltage stabilizing modules U2 and R18, R21, and voltage stabilizing module U3; and interlock control by resistor R17, resistor R22, transistor Q1, transistor Q2 and diode D1. Module 24; when the voltage regulator module U2 detects that the battery power is lower than the 'must charge' threshold, the driving LED DS6 indicator lights up; when the battery voltage is higher than 'must charge' and lower than the 'direct use' threshold, The voltage module U2 locks the LED DS6 to a low level, and simultaneously lights the LED DS4 to indicate the 'recommended charging' indicator. When the battery voltage is higher than the 'direct use' threshold, the voltage regulator module U3 locks the light-emitting diode DS4 to a low level through the diode D1, the transistor Q2, and the transistor Q1, and simultaneously illuminates the light-emitting diode DS5 to indicate 'direct use'.

Example three:

In the third embodiment of the present invention, as shown in FIG. 1 and FIG. 4, the execution module 21 adopts a light control execution module; the power supply detection module VR1 and the control chip U4 form a power detection and interlock control module; and the resistors R26, R27, and R28 The light-emitting diodes DS7, DS8, and DS9 constitute a display module 25, and the load 22 uses a resistor R25 as a light-load circuit. At this time, by searching for the 'light load voltage characteristic and power relationship table', the threshold values such as 'must charge', 'recommended charge', and 'direct use' can be determined.

When the light control switch Q4 is irradiated with light, the driving transistor Q3 is turned on, and the FET Q5 is supplied with a forward voltage to turn on the FET Q5. The regulated power supply module VR1 provides a stable voltage for the control chip U4. The control chip U4 is a chip for setting the AD conversion module and the driving circuit, and the battery voltage is detected by the P0.6 pin, and the AD conversion is performed by the CPU, and the LEDs DS7, DS8, and DS9 are respectively driven by the software interlock to indicate the battery's necessity. Charging ', 'recommended charging', 'direct use' status.

Claims (7)

1. A smart capacitance measuring battery, comprising: a battery body and a microelectronic circuit mounted on the battery body and connected between the positive and negative electrodes of the battery body, wherein the micro electronic circuit comprises an execution module, a load, and a power detecting module. And an interlocking control module and a display module, wherein the input end of the execution module is connected to the positive end of the battery body, and the output end of the execution module is respectively connected to the input end of the power detecting module and one end of the load, the power detecting module The output end is connected to the input end of the interlock control module, the output end of the interlock control module is connected to the input end of the display module, the other end of the load, the ground end of the power detecting module, and the grounding of the interlock control module The terminal and the grounding end of the display module are respectively connected to the negative terminal of the battery body.

2. The smart volume measuring battery according to claim 1, wherein the execution module is a mechanical switch or an electronic switch.

3. The smart volume measuring battery according to claim 1, wherein the load is a resistive or capacitive load or an inductive load.

4. The smart volume measuring battery according to claim 1, wherein said power detecting module employs an operational amplifier circuit or an AD conversion circuit, but is not limited to an operational amplifier circuit and an AD conversion circuit.

5. The smart volume measuring battery according to claim 1, wherein said display module is an LED display circuit.

6. The smart volume measuring battery according to claim 1, wherein said display module is an LCD display circuit.

7. The smart volume measuring battery according to claim 1, wherein said display module is a direct display user operation scheme.

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