CN205301458U - Lithium battery protection board tester - Google Patents

Abstract

The utility model relates to a lithium battery protection board tester. The utility model adopts the following technical scheme: it includes a DC adjustable voltage stabilized power supply a and a DC adjustable voltage stabilized power supply b, the positive and negative poles of the DC adjustable voltage stabilized power supply a are connected in series with multiple equal resistance resistors, and the front and rear ends of the resistors are wired to lead out wires Connect to the middle position of multiple single-pole double-throw switches respectively, and the lead-out wires of the positive end of the resistance in the above-mentioned lead-out wires are respectively connected in series to press the switch, and the lead-out wires of the middle position of each of the above-mentioned single-pole double-throw switches are respectively connected to the voltage acquisition port of the protection board ; The positive electrode of the DC adjustable regulated power supply b is connected to the left port of each of the above-mentioned SPDT switches after being connected in series with an ammeter, and the negative pole of the DC adjustable regulated power supply b is connected to the right terminal of each of the above-mentioned SPDT switches Bit port, the positive pole of the DC adjustable voltage stabilized power supply b leads out the lead wire in series with a buzzer and connects to the P- port of the protection board, the negative pole of the DC adjustable voltage stabilized power supply b leads out the wire to the B- port of the protection board port.

Description

Lithium battery protection board tester

technical field

The utility model relates to the field of electrical equipment, in particular to a simple lithium battery protection board tester.

Background technique

Since Sony successfully developed the first commercial lithium-ion battery in 1992, lithium batteries have been widely used in portable electronic products due to their high energy ratio, long life, high platform voltage, and environmental protection. With the development of microelectronics technology, miniaturized equipment is increasing day by day. In recent years, its market share in the field of energy storage batteries has also increased year by year. In the practical stage, with the large-scale application of lithium batteries in various environments, and lithium batteries have higher requirements for their own safety precautions, there are usually 2 to 3 layers of protection in single lithium batteries, so it is necessary to use more To further improve the safety control technology, a protection board has to be added to the battery pack to ensure that the battery pack will not be overcharged, over-discharged, over-current and short-circuited. It plays a vital role. How to ensure the normal performance of each protective board requires testing each protective board before installation, and the price of hundreds of thousands of protective board testers currently on the market also makes some Small and medium-sized enterprises are discouraged, and manual testing is very cumbersome, which may even affect the accuracy of test results.

Contents of the invention

In order to solve the above problems, the utility model provides a lithium battery protection board tester, which can be applied to the detection of various types of lithium battery protection boards.

In order to achieve the above object, the utility model adopts the following technical solutions:

Lithium battery protection board tester, including DC adjustable voltage stabilized power supply a and DC adjustable stabilized voltage power supply b, the positive and negative poles of DC adjustable voltage stabilized power supply a are connected in series with multiple equal resistance resistors, and the front and rear ends of the resistors are connected to lead wires respectively Connect to the middle position of multiple single-pole double-throw switches, the lead-out wires of the positive end of the resistance in the above-mentioned lead wires are respectively connected in series to press the switch, and the lead-out wires of the middle position of each of the above-mentioned single-pole double-throw switches are respectively connected to the voltage acquisition port of the protection board;

The positive pole of the DC adjustable regulated power supply b is connected in series with an ammeter to the left port of each SPDT switch mentioned above, and the negative pole of the DC adjustable regulated power supply b is connected to the right port of each SPDT switch mentioned above Port, the positive pole of the DC adjustable voltage stabilized power supply b is connected to the P-port of the protection board, and the negative pole of the DC adjustable voltage stabilized power supply b is connected to the B-port of the protection board. .

The ammeter is a liquid crystal display ammeter, and the single-pole double-throw switch is a three-position button switch.

Use 2 DC adjustable regulated power supplies for power supply, one regulated power supply provides working voltage for the protection board, and the other regulated power supply supplies power for each string of voltage acquisition lines on the protection board, simulating the change of single string voltage, when the voltage is too low or too high, the buzzer on the tester will stop sounding, indicating that the protection board is disconnected, and the voltage value at this time is the over-discharge or over-charge protection value of the string. When the buzzer sounds, it indicates that the protection board is connected, and the voltage value at this time is the recovery value of the over-discharge or over-charge of the string. Through the switch added to each string circuit, the size of the current self-consumption current of a single string can be displayed.

The beneficial effects of the utility model are: it can be applied to the detection of various types of lithium battery protection boards, and the wiring port is convenient for wiring. Reasonable, easy to operate, low production cost and other significant advantages.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Accompanying drawing 1 is a kind of structure diagram of a simple 4-series ternary lithium battery protection board tester.

In the attached drawings: 1. DC adjustable regulated power supply a, 2. Resistor, 3. Push switch, 4. Single pole double throw switch, 5. Protection board voltage acquisition port, 6. B-port of protection board, 7. Protection board P-port of the board, 8, DC adjustable voltage stabilized power supply b, 9, ammeter.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described:

Lithium battery protection board tester, in the connection relationship of each component, the positive and negative poles of the DC adjustable regulated power supply a1 are connected in series with multiple equal-resistance resistors 2, and the front and rear terminals of the resistor 2 are connected to multiple single-pole double-throw switches. In the middle position of 4, the lead-out wires of the positive end of the resistance 2 in the above-mentioned lead-out wires are respectively connected in series to press the switch 3, and the lead-out wires of the middle position of each of the above-mentioned single-pole double-throw switches 4 are respectively connected to the voltage acquisition port 6 of the protection board; DC adjustable The positive pole of the regulated power supply b8 is connected in series with an ammeter 9 and then connected to the left port of each SPDT switch 4 mentioned above, and the negative pole of the DC adjustable regulated power supply b8 is connected to the right port of each SPDT switch 4 mentioned above Port, the positive pole of the DC adjustable voltage stabilized power supply b8 is connected to the P-port 7 of the protection board, and the negative pole of the DC adjustable voltage stabilized power supply b is connected to the B-port of the protection board. 6. The ammeter 9 is a liquid crystal display ammeter, and the SPDT switch 4 is a three-position button switch.

Example 1

There are 4 groups of connected resistors and push switches, 5 groups of three-position button switches, and the voltage acquisition port 5 of the protection board is B0, B1-, B1-, B2-, B3-, B4-.

Connect the B-line of the 4-string ternary lithium battery protection board to be tested with the B-port 6 of the protection board, connect the P-line of the protection board with the P-port 7 of the protection board, and connect the voltage acquisition lines B0-B4 of the protection board in sequence Connect to B0, B1-, B1-, B2-, B3-, B4- of the protection board voltage acquisition port 5.

The positive output line of the DC adjustable regulated power supply a is connected to the positive interface of the protection board power supply regulated power supply, the negative output line is connected to the negative pole interface of the protection board power supply regulated power supply, and the regulated power supply is adjusted to 16V1A output; the other The positive output line of a DC adjustable regulated power supply b is connected to the positive interface of the single-string analog regulated power supply, the negative output line is connected to the negative interface of the single-string analog regulated power supply, and the regulated power supply is adjusted to 4V0. 5A output; the four groups of push switches 3 are turned on, and the buzzer 10 will buzz at this time, indicating that the protection board is connected. If the buzzer 10 does not buzz, it indicates that the protection board is faulty.

Example 2

There are 4 groups of connected resistors and push switches, 5 groups of three-position button switches, and the protection board voltage acquisition port 5 is B0, B1-, B1-, B2-, B3-, B4-.

Connect the B-line of the 4-string ternary lithium battery protection board to be tested with the B-port 6 of the protection board, connect the P-line of the protection board with the P-port 7 of the protection board, and connect the voltage acquisition lines B0-B4 of the protection board in sequence Connect to B0-, B1-, B1-, B2-, B3-, B4- of protection board voltage acquisition port 5.

The positive output line of the DC adjustable regulated power supply a is connected to the positive interface of the protection board power supply regulated power supply, the negative output line is connected to the negative pole interface of the protection board power supply regulated power supply, and the regulated power supply is adjusted to 16V1A output; the other The positive output line of a DC adjustable regulated power supply b is connected to the positive interface of the single-string analog regulated power supply, the negative output line is connected to the negative interface of the single-string analog regulated power supply, and the regulated power supply is adjusted to 4V0. 5A output.

Each switch of the five groups of three-position toggle switches is divided into three positions: the left end position, the middle position and the right end position. The positive output line of the positive pole is connected, and the right end is connected with the negative pole output line of the DC adjustable voltage stabilized power supply b. Throw the first three-position toggle switch to the right end position, and throw the second three-position toggle switch to the left end position. At this time, the connection between the protection board voltage acquisition port B0- and the protection board voltage acquisition line B1- interface The voltage is 4V. Slowly increase the output voltage of the regulated power supply b. When the buzzer stops beeping, it means that the protection board is disconnected. The voltage value at this time is the overcharge protection voltage value of the string; slowly decrease the regulated voltage The output voltage of the power supply b, when the buzzer beeps, it indicates that the protection board is connected, and the voltage value at this time is the overcharge protection recovery voltage value of the string; continue to reduce the output voltage of the regulated power supply b, when the buzzer If the buzzer stops, it means that the protection board is disconnected, and the voltage value at this time is the over-discharge protection voltage value of the string. Increase the output voltage of the regulated power supply b. When the buzzer beeps, it indicates that the protection board is connected. The voltage value at this time is the over-discharge protection recovery voltage value of the string.

In the process of testing the overcharge and overdischarge protection voltage values of a single string in Example 2, the corresponding push switch is disconnected, and the value displayed on the display screen of the ammeter is the self-consumption current of the string protection.

Obviously, the above-mentioned embodiments are only preferred embodiments of the present invention, and any simple improvement on this basis falls within the scope of protection of the present invention.

Claims (3)

1. a tester for protecting plate of lithium cell, comprise direct current adjustable stabilized voltage supply a(1) and direct current adjustable stabilized voltage supply b(8), it is characterized in that, direct current adjustable stabilized voltage supply a(1) the multiple resistance resistance (2) that wait of both positive and negative polarity series connection, the interposition of multiple single-pole double-throw switch (SPDT)s (4) is drawn wire and is accessed respectively in the front and back end wiring of resistance (2), above-mentioned resistance (2) positive terminal of drawing wire draw the wire push switch (3) of also connecting respectively, the interposition of above-mentioned each single-pole double-throw switch (SPDT) (4) is drawn wire and is accessed respectively baffle voltage acquisition port (6),

Direct current adjustable stabilized voltage supply b(8) the connect left bit port of the above-mentioned each single-pole double-throw switch (SPDT) (4) of access after an ammeter (9) of positive pole; the negative pole of direct current adjustable stabilized voltage supply b (8) accesses the right bit port of above-mentioned each single-pole double-throw switch (SPDT) (4); the positive pole of direct current adjustable stabilized voltage supply b (8) is drawn wire again and is connected a buzzer (10) afterwards and access baffle P-port (7), and the negative pole of direct current adjustable stabilized voltage supply b is drawn wire access baffle B-port (6) again.

2. tester for protecting plate of lithium cell according to claim 1, is characterized in that, described ammeter (9) is liquid crystal display ammeter.

3. tester for protecting plate of lithium cell according to claim 2, is characterized in that, described single-pole double-throw switch (SPDT) (4) is three toggle switch.