CN112379278B - Carbon-coated lithium thionyl chloride battery capacity detection device and automatic test method thereof - Google Patents

Abstract

The invention discloses a carbon-coated lithium thionyl chloride battery capacity detection device and an automatic testing method thereof. The device includes a detection device main body, and the detection device main body includes a power supply part, a control and display part, and a test circuit part, wherein: detection The main body of the device includes a power supply part, a control and display part, and a test circuit part; the power supply part includes a power switch, a charging interface, an internal power supply and its charging circuit; the control and display part includes a controller MCU, a debugging interface, an LED indicator light, and a display screen; The test circuit part includes battery voltage sampling circuit, passivation elimination load, pulse test load, switch 1 and its driving circuit, switch 2 and its driving circuit. The invention solves the problem that the capacity of the carbon-coated lithium thionyl chloride battery is difficult to characterize, and the remaining capacity cannot be detected simply, non-destructively and accurately, and the detection of the remaining capacity can be realized.

Description

Carbon-coated lithium thionyl chloride battery capacity detection device and automatic testing method thereof

technical field

The invention belongs to the technical field of lithium thionyl chloride battery detection, and relates to a capacity detection device of a carbon-coated lithium thionyl chloride battery and an automatic testing method thereof.

Background technique

Carbon-coated lithium thionyl chloride batteries are widely used in smart meters and other equipment due to their high specific energy and long life. As a key backup power supply, its capacity status is an important factor affecting the reliability of equipment and systems. Since carbon-in-coated lithium thionyl chloride batteries are non-rechargeable primary batteries, capacity testing is often time-consuming and destructive. In addition, due to the influence of complex characteristics such as battery passivation, it is still impossible to easily, non-destructively and accurately detect the remaining capacity of carbon-coated lithium thionyl chloride batteries.

SUMMARY OF THE INVENTION

In view of the above deficiencies in the prior art, the present invention provides a capacity detection device for a carbon-coated lithium thionyl chloride battery and an automatic testing method thereof. The present invention solves the problem of difficulty in characterizing the capacity of the current carbon-coated lithium thionyl chloride battery, and cannot easily, non-destructively and accurately detect the remaining capacity, and can realize the detection of the remaining capacity.

The purpose of this invention is to realize through the following technical solutions:

A carbon-coated lithium thionyl chloride battery capacity detection device, comprising a detection device main body, the detection device main body includes a power supply part, a control and display part, and a test circuit part, wherein:

The main body of the detection device includes a power supply part, a control and display part, and a test circuit part;

The power supply part includes a power switch, a charging interface, an internal power supply and a charging circuit thereof;

The control and display part includes a controller MCU, a debugging interface, an LED indicator, and a display screen;

The test circuit part includes a battery voltage sampling circuit, a passivation elimination load, a pulse test load, a switch 1 and its drive circuit, and a switch 2 and its drive circuit;

The front-end outer surface of the main body of the detection device is provided with a display screen, an LED status indicator, and a test interface, and the side surface of the main body of the detection device is provided with a power switch, a debugging interface, and a charging interface;

The charging interface is connected with the internal power supply and its charging circuit, and is used for charging the internal power supply;

The internal power supply is connected with the control and display part and the test circuit part, and is used for supplying power to the control and display part and the test circuit part;

The controller MCU is connected with the display screen, the LED indicator light, the debugging interface, the battery voltage sampling circuit, the internal power supply and its charging circuit, the switch 1 and its driving circuit, and the switch 2 and its driving circuit;

The controller MCU is used to control the display screen, control the lighting of the LED indicators, control the on-off of switches 1 and 2, carry out voltage data acquisition and processing analysis, control the internal power supply charging, and communicate and data with other devices through the debugging interface. transmission;

The display screen is used to display the automatic test stage, the battery charging state, and the remaining capacity of the test result;

The LED indicator is used to display that the battery is detected to be connected to the test terminal;

The test interface is divided into a battery positive access terminal and a battery negative access terminal, which are used to access the battery under test;

the power switch is used to turn on the device;

The debugging interface is used for communication and debugging with the internal control terminal;

The switch 1 and its drive circuit are used to control the passivation to eliminate the load on and off;

The switch 2 and its drive circuit are used to control the on and off of the pulse test load;

The battery voltage sampling circuit is used to divide the voltage of the battery to be tested so as to facilitate acquisition.

An automatic testing method for the above-mentioned carbon-coated lithium thionyl chloride battery capacity detection device, comprising the following steps:

Step 1. Stage 0: No battery to be tested is connected, switch 1 and switch 2 are disconnected, and the display shows "no battery connection detected";

Step 2. Stage 1: The battery to be tested is connected to the test terminal, the controller MCU detects that the battery to be tested is connected, the LED indicator lights up, and the display shows "start battery capacity detection"; switch 1 is turned on, and the battery to be tested is turned on. Passivation for a fixed time eliminates discharge, and the display shows "de-passivation of battery";

Step 3, Stage 2: Switch 1 is turned off, the battery to be tested is left to stand for a fixed time, and the display shows "stand the battery after passivation is eliminated";

Step 4. Stage 3: Switch 2 is closed, and a short-term pulse discharge is performed for a fixed time. The voltage waveform of the battery to be tested is collected by the controller MCU as the remaining capacity detection standard, and the display screen displays "Perform pulse test";

Step 5. Stage 4: The switch 2 is turned off, the battery to be tested is left to stand for a fixed time, and the voltage waveform of the battery to be tested is collected by the controller MCU as the remaining capacity detection standard, and the display screen displays "Perform pulse test";

Step 6: Identify the voltage measured in step 5, and compare it with the sample library stored in the controller MCU, and the display shows "capacity calculation".

After step 7 and step 6, the display screen shows the remaining capacity of the battery and the measurement is completed.

Compared with the prior art, the present invention has the following advantages:

1. Easy to use. Just connect the battery to the test interface, and the device can automatically complete the power measurement and power display without complicated operations.

2. The device is compact and easy to carry.

3. Wide application range. The specific parameters in the test process can be adjusted according to the characteristics of carbon-coated lithium thionyl chloride batteries of different models and manufacturers.

4. Solve the problem of time-consuming and difficult capacity detection of the current carbon-coated lithium thionyl chloride battery, and can easily, non-destructively and accurately detect the remaining capacity.

Description of drawings

FIG. 1 is a front view of a carbon-coated lithium thionyl chloride battery capacity detection device.

FIG. 2 is a side view of a capacity detection device for a carbon-coated lithium thionyl chloride battery.

FIG. 3 is a schematic diagram of the internal structure of a carbon-coated lithium thionyl chloride battery capacity detection device.

FIG. 4 is a flow chart of an automatic measurement method of battery capacity.

Figure 5 is a schematic diagram of a single test cycle timeline.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings, but are not limited thereto. Any modification or equivalent replacement of the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention shall be included in the present invention. within the scope of protection.

The present invention provides a carbon-coated lithium thionyl chloride battery capacity detection device, including a detection device main body, as shown in Figures 1-3, the detection device main body includes a power supply part, a control and display part, and a test circuit part, wherein :

The main body of the detection device includes a power supply part, a control and display part, and a test circuit part;

The power supply part includes a power switch 4, a charging interface 6, an internal power supply and its charging circuit;

The control and display part includes a controller MCU, a debugging interface 5, an LED indicator 2, and a display screen 1;

The test circuit part includes a battery voltage sampling circuit, a passivation elimination load, a pulse test load, a switch 1 and its drive circuit, and a switch 2 and its drive circuit;

The front-end outer surface of the main body of the detection device is provided with a display screen 1, an LED status indicator 2, and a test interface 3, and the side surface of the main body of the detection device is provided with a power switch 4, a debugging interface 5, and a charging interface 6;

The charging interface 6 is connected with the internal power supply and its charging circuit, and is used for charging the internal power supply;

The internal power supply is connected with the control and display part and the test circuit part, and is used for supplying power to the control and display part and the test circuit part;

The controller MCU is connected with the display screen 1, the LED indicator light 2, the debugging interface 5, the battery voltage sampling circuit, the internal power supply and its charging circuit, the switch 1 and its driving circuit, and the switch 2 and its driving circuit;

The controller MCU is used to control the display screen, control the lighting of the LED indicators, control the on-off of switches 1 and 2, carry out voltage data acquisition and processing analysis, control the internal power supply charging, and communicate and data with other devices through the debugging interface. transmission;

The display screen 1 is used to display the remaining capacity of the automatic test stage and the test result;

The LED indicator 2 is used to display that the battery is detected to be connected to the test terminal;

The test interface 3 is divided into a battery positive access terminal and a battery negative access terminal, which are used to access the battery under test;

The power switch 4 is used to turn on the device;

The debugging interface 5 is used for communication and debugging with the internal control terminal;

The switch 1 and its drive circuit are used to control the passivation to eliminate the load on and off;

The switch 2 and its drive circuit are used to control the on and off of the pulse test load;

The battery voltage sampling circuit is used to divide the voltage of the battery to facilitate acquisition.

In the present invention, the switches of the switch 1 and its driving circuit, and the switches of the switch 2 and its driving circuit may be small relays or MOS tubes, and the switches are normally open.

As shown in Figure 4 and Figure 5, the automatic test process of the carbon-coated lithium thionyl chloride battery capacity detection device is as follows:

1. If the battery to be tested is not connected, the device is in stage 0, and the display shows "no battery connection detected";

2. After the battery to be tested is connected to the test terminal, the controller MCU detects that the battery to be tested is connected, the LED indicator lights up, and the display shows "start battery capacity detection".

3. Switch 1 is turned on, and enter stage 1. The battery to be tested is passivated for a fixed period of time to eliminate discharge, and the display shows "de-passivation of the battery".

4. After step 3, enter stage 2, switch 1 is turned off, the battery to be tested is left to stand for a fixed time, and the display shows "stand still battery after passivation is eliminated".

5. After step 4, enter stage 3, switch 2 is closed, and perform short-term pulse discharge for a fixed time; after stage 3, enter stage 4, switch 2 is turned off, and the battery to be tested is left to stand for a fixed time. The voltage waveforms of the battery to be tested in stage 3 and stage 4 are collected by the controller MCU as the remaining capacity detection standard, and the display screen displays "Perform pulse test".

6. After step 5, identify the voltage measured in step 5, and compare it with the sample library stored in the controller MCU, and the display shows "capacity calculation".

7. After step 6, the display shows the remaining capacity of the battery and the measurement is completed.

Claims (2)

1. The utility model provides a carbon package formula lithium thionyl chloride battery capacity detection device which characterized in that the device includes the detection device main part, the detection device main part includes power supply part, control and display part, test circuit part, wherein:

the power supply part comprises a power switch, a charging interface, an internal power supply and a charging circuit thereof;

the control and display part comprises a controller MCU, a debugging interface, an LED indicator light and a display screen;

the test circuit part comprises a battery voltage sampling circuit, a passivation eliminating load, a pulse test load, a switch 1 and a drive circuit thereof, and a switch 2 and a drive circuit thereof;

the outer surface of the front end of the detection device main body is provided with a display screen, an LED indicator light and a test interface, and the side surface of the detection device main body is provided with a power switch, a debugging interface and a charging interface;

the charging interface is connected with the internal power supply and the charging circuit thereof and is used for charging the internal power supply;

the internal power supply is connected with the control and display part and the test circuit part and is used for supplying power to the control and display part and the test circuit part;

the controller MCU is connected with the display screen, the LED indicator lamp, the debugging interface, the battery voltage sampling circuit, the internal power supply and the charging circuit thereof, the switch 1 and the driving circuit thereof, and the switch 2 and the driving circuit thereof;

the controller MCU is used for controlling display of the display screen, controlling the LED indicator lamps to be lightened, controlling the switches 1 and 2 to be switched on and off, carrying out voltage data acquisition and processing analysis, controlling charging of an internal power supply, and carrying out communication and data transmission with other equipment through a debugging interface;

the display screen is used for displaying an automatic test stage, a battery charging state and a test result residual capacity;

the LED indicator light is used for displaying that the battery is detected to be connected to the test terminal;

the test interface is divided into a battery anode access terminal and a battery cathode access terminal and is used for accessing a battery to be tested;

the power switch is used for starting the device;

the debugging interface is used for communicating and debugging with the internal control end;

the switch 1 and a driving circuit thereof are used for controlling the connection and disconnection of the passivation eliminating load;

the switch 2 and a driving circuit thereof are used for controlling the on and off of the pulse test load;

the battery voltage sampling circuit is used for dividing the voltage of the battery to be detected so as to facilitate acquisition;

the automatic test process of the detection device is as follows:

step one, stage 0: when no battery to be tested is connected, the switch 1 and the switch 2 are disconnected, and the display screen displays that the battery connection is not detected;

step two, stage 1: the battery to be tested is connected with the test terminal, the controller MCU detects that the battery to be tested is connected, the LED indicator lamp is lightened, and the display screen displays 'starting battery capacity detection'; the switch 1 is switched on, the battery to be tested is passivated, eliminated and discharged for a fixed time, and a display screen displays 'passivation treatment of the battery is carried out';

step three, stage 2: the switch 1 is switched off, the battery to be tested is kept stand for a fixed time, and a display screen displays that the battery is kept stand after passivation elimination;

step four, stage 3: the switch 2 is closed, short pulse discharge of fixed time is carried out, the voltage waveform of the battery to be tested is collected by the MCU and is used as a residual capacity detection standard, and the display screen displays 'pulse test' to be carried out;

step five, stage 4: the switch 2 is switched off, the battery to be tested is kept stand for a fixed time, the voltage waveform of the battery to be tested is collected by the MCU and is used as a residual capacity detection standard, and the display screen displays 'pulse test';

step six, identifying the voltage measured in the step five, comparing the voltage with a sample library stored in a controller MCU (microprogrammed control Unit), and displaying the capacity calculation on a display screen;

and step seven and step six are finished, the display screen displays the residual capacity of the battery and displays that the measurement is finished.

2. The apparatus for detecting the capacity of a carbon-covered lithium thionyl chloride battery according to claim 1, wherein the switch 1 and the driving circuit thereof, and the switch 2 and the driving circuit thereof are a small relay or a MOS transistor.

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