Lithium battery electric quantity detection device

Abstract

The utility model relates to the technical field of lithium batteries, and discloses a lithium battery electric quantity detection device which comprises a lithium battery body, one side of the lithium battery body is provided with a power connector, and the lithium battery electric quantity detection device is characterized in that the lithium battery body comprises a cover plate, a shell, a connecting seat, a lithium battery and an electric quantity measurement lamp panel, a lithium battery is arranged in the shell, the lithium battery is connected with an electric quantity measuring lamp panel through a circuit, the electric quantity measuring lamp panel is installed at one end of a mounting seat through a bolt, and a clamping block on the inner side of a cover plate is inserted into a clamping seat, so that the cover plate is fixed; and when disassembly is needed, a pressing rod is pressed, so that an ejection block at one end of the pressing rod is in contact with a clamping block, the clamping block is ejected out from the interior of a clamping groove, the clamping block is separated from a clamping seat, disassembly and assembly are simple, and electric quantity detection is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a lithium battery power detection device. Background Art

[0002] 3.7v lithium battery is a lithium battery with a nominal voltage of 3.7v and a full-charge voltage of 4.2v. Its capacity ranges from hundreds to thousands of mAh. It is generally used in various instruments, testing instruments, medical instruments, POS machines, laptops and other products. It mainly relies on the movement of lithium ions between the positive and negative electrodes to work. During the charging and discharging process, Li+ is embedded and de-embedded between the two electrodes. When charging, Li+ is de-embedded from the positive electrode and embedded in the negative electrode through the electrolyte. The negative electrode is in a lithium-rich state. When discharging, it is the opposite. Lithium batteries are usually connected with a power indicator light to show the battery usage status. It is not more convenient to detect the power of lithium batteries. Utility Model Content

[0003] The purpose of the utility model is to provide a lithium battery power detection device to solve the problems raised in the above-mentioned background technology. It is convenient to directly disassemble the lithium battery for detection, and the power can also be displayed through the circuit board of the lithium battery, so that the power of the lithium battery can be conveniently detected.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A lithium battery power detection device, the lithium battery body comprises a cover plate, a shell, a connecting seat, a lithium battery and a power measurement light board, the front end of the lithium battery body is provided with a cover plate, the cover plate and the shell are connected together through the connecting seat, a lithium battery is provided inside the shell, the lithium battery and the power measurement light board are connected through a circuit, and the power measurement light board is installed at one end of the mounting seat by bolts,

[0006] The power measurement lamp board includes a power measurement circuit composed of a PCB board and circuit elements on the PCB. The power measurement circuit includes an operational amplifier, a plurality of resistors and a plurality of LED lights. The operational amplifier adopts LM324. The operational amplifier is connected to the power supply end of the lithium battery through a resistor. The pins of the operational amplifier are connected to a plurality of LED lights. The amount of power is indicated according to the brightness of the lights.

[0007] Furthermore, a power supply terminal is provided at the front end of the lithium battery, and the power supply terminal includes a positive electrode connector and a negative electrode connector, and the positive electrode connector and the negative electrode connector are provided separately.

[0008] Furthermore, the connection seat is provided with a connection hole, which matches the power supply end. The connection seat is composed of an elliptical outer wall and an integral inner plate, the inner plate is provided with a connection hole, and the outer wall is provided with 4 through holes, and the through holes are all provided with a card seat, an elastic element, a pressing rod, a top block, a card slot, and a card block.

[0009] The pressing rod is inserted into the through hole, an elastic element is sleeved on the bottom of the pressing rod, a socket is also provided inside the outer wall, the pressing rod is arranged inside the socket, a slot is provided at the center position of the socket, one end of the pressing rod is connected to a top block, and the slot is movably connected to a block fixed on the cover plate.

[0010] Furthermore, the cover plate is provided with four openings, and the LED lights leak out through the openings, and the power level is displayed by lighting up one of the openings.

[0011] Furthermore, an insulating pad is bonded to one side of the circuit measuring lamp board by adhesive, and the other side of the insulating pad is bonded to the connecting seat.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. Insert the card block on the inside of the cover into the card holder to fix the cover. At the same time, connect the wires under the power measurement light board to the positive and negative electrodes of the lithium battery body to detect the power. When disassembly is required, press the pressing rod to make the top block at one end contact with the card block, push the card block out of the card slot, and complete the separation of the card block and the card holder. Disassembly and assembly are simple, and power detection is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a lithium battery power detection device;

[0015] Figure 2 A rear cross-sectional view of a connector in a lithium battery power detection device;

[0016] Figure 3 A rear cross-sectional view of a cover plate in a lithium battery power detection device;

[0017] Figure 4 The figure is a schematic diagram of the structure of a card holder in a lithium battery power detection device.

[0018] Figure 5 The figure is a circuit schematic diagram of a lithium battery power detection device.

[0019] Figure 6 The present invention is a schematic diagram of circuit connection in a lithium battery power detection device.

[0020] Figure 7The present invention is a connection diagram of a charging circuit in a lithium battery power detection device.

[0021] In the figure: 1, lithium battery body; 2, power connector; 3, cover plate; 4, LED light; 5, connection seat; 51, outer wall; 52 inner plate;

[0022] 6. Pressing rod; 7. Card holder; 8. Housing;

[0023] 9. Power supply terminal; 91. Positive terminal; 92. Negative terminal; 10. Connection hole;

[0024] 11. elastic element; 12. through hole;

[0025] 13. top block; 14. opening;

[0026] 15. Insulation pad; 16. Card block;

[0027] 17. Electric quantity measuring light board; 171. PCB board;

[0028] 19. Card slot. DETAILED DESCRIPTION

[0029] See also Figures 1 to 7 In the embodiment of the utility model,

[0030] The battery power detection can be realized. When disassembly is needed, the disassembly and assembly are simple, and the battery energy detection problem can be solved.

[0031] The working principle of the utility model is: insert the card block 16 on the inner side of the cover plate 3 into the card seat 7 to fix the cover plate 3, and at the same time connect the wires under the power measurement light board 17 to the positive and negative electrodes of the lithium battery body 1 to detect the power thereof. When disassembly is required, press the pressing rod 6 to make the top block 12 at one end contact with the card block 16, and push the card block 16 out from the inside of the card slot 19 to complete the separation of the card block 16 from the card seat 7. The disassembly and assembly are simple, and the power detection can be performed in real time.

[0032] A lithium battery power detection device includes a lithium battery body 1, a power connector 2 is provided on one side of the lithium battery body 1, and a specific power terminal 9 of the lithium battery is electrically connected to the lithium battery through a charging circuit. The lithium battery body 1 includes a cover plate 3, a shell 8, a connecting seat 5, a lithium battery and a power measurement light board 17. The front end of the lithium battery body 1 is provided with a cover plate 3, the cover plate 3 and the shell 8 are connected together through the connecting seat 5, and a lithium battery is provided inside the shell 8. The lithium battery is connected to the power measurement light board 17 through a circuit, and the power measurement light board 17 is installed at one end of the mounting seat by bolts.

[0033] like Figure 1As shown, the lithium battery body 1 is composed of a cover plate 3, a connection seat 5, and a shell 8 from left to right. The power connector 2 extends from an opening 14 on one side of the shell 8. The installation is simple.

[0034] The power measurement lamp board 17 includes a PCB board 171 and a power measurement circuit composed of circuit elements on the PCB. The power measurement circuit includes an operational amplifier, a plurality of resistors and a plurality of LED lamps 4. The operational amplifier is LM324.

[0035] As shown in the figure, LM324 is a quad operational amplifier IC, which consists of four high gain amplifiers. These four high gain amplifiers can be operated from a single voltage source.

[0036] The operational amplifier is connected to the power supply terminal 9 of the lithium battery through a resistor, and the pins of the operational amplifier are connected to a number of LED lights 4, and the amount of electricity is indicated by the brightness of the lights 4. The circuit schematic diagram is as follows Figure 4 As shown, the circuit schematic is a prior art known to those skilled in the art. Since IC LM324 is a comparator based on OPAMP, whenever the potential of the non-inverting terminal of a particular OPAMP is higher than that of the inverting terminal, the OPAMP output will be pulled up to approximately the VCC voltage level, and the LED will not light up here because the voltages of the anode and cathode of the LED are equal, so no current flows. If the voltage of the inverting terminal is higher than the voltage of the non-inverting terminal, the output of the OPAMP will be pulled down to the GND level, so the LED will light up because there is a potential difference between its terminals. The circuit connection diagram is shown in Figure 5 As shown,

[0037] Furthermore, a power supply terminal 9 is provided at the front end of the lithium battery, and the power supply terminal 9 includes a positive electrode connector 91 and a negative electrode connector 92, and the positive electrode connector 91 and the negative electrode connector 92 are provided separately.

[0038] Furthermore, the connection base 5 is provided with a connection hole 10, which matches the power supply terminal 9. The connection base 5 is composed of an elliptical outer wall 51 and an integral inner plate 52. The inner plate 52 is provided with the connection hole 10. The outer wall 51 is provided with four through holes 12. The through holes 12 are all provided with a card seat 7, an elastic element 11, a pressing rod 6, a top block 13, a card slot 19, and a card block 16.

[0039] The pressing rod 6 is inserted into the through hole 12, and an elastic element 11 is sleeved on the bottom of the pressing rod 6. A holder 7 is also provided inside the outer wall 51. The pressing rod 6 is provided inside the holder 7, and a slot 19 is provided at the center of the holder 7. One end of the pressing rod 6 is connected to a top block 13, and the slot 19 is movably connected to a block 16 fixed on the cover plate 3.

[0040] Furthermore, the cover plate 3 is provided with four openings 14, and the LED lights 4 leak out through the openings 14, and the power level is displayed by lighting up one of the openings 14.

[0041] Furthermore, an insulating pad 15 is bonded to one side of the circuit measuring lamp 4 board 171 by adhesive, and the other side of the insulating pad 15 is bonded to the connecting seat 5 .

[0042] The charging circuit includes a TP4059 charger, and the circuit schematic is shown in Figure 7 As shown,

[0043] CHRG: Charging status indicator terminal of open-drain output. When charging is in progress, the CHRG pin is pulled to a low level by the internal switch, otherwise the CHRG pin is in a high-impedance state.

[0044] GND: Ground.

[0045] BAT: Charge current output. This pin provides charge current to the battery and regulates the final float voltage to 4.2V.

[0046] VCC: Positive Input Supply Voltage. This pin supplies power to the charger. VCC can vary between 4V and 9V and should be bypassed with at least a 1μF capacitor.

[0047] STDBY: Battery charging completion indication terminal. When the battery charging is completed, STDBY is pulled to a low level by the internal switch, indicating that the charging is completed. Otherwise, the pin will be in a high impedance state.

[0048] PROG: Charge current setting, charge current monitoring and shutdown pin.

[0049] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lithium battery power detection device, comprising a lithium battery body, a power connector is provided on one side of the lithium battery body, and is characterized in that: The lithium battery body comprises a cover plate, a shell, a connection seat, a lithium battery and a power measurement light board. The front end of the lithium battery body is provided with a cover plate, the cover plate and the shell are connected together through the connection seat, a lithium battery is provided inside the shell, the lithium battery and the power measurement light board are connected through a circuit, and the power measurement light board is installed at one end of the mounting seat by bolts. The power measurement lamp board includes a power measurement circuit composed of a PCB board and circuit elements on the PCB. The power measurement circuit includes an operational amplifier, a plurality of resistors and a plurality of LED lights. The operational amplifier adopts LM324. The operational amplifier is connected to the power supply end of the lithium battery through a resistor. The pins of the operational amplifier are connected to a plurality of LED lights. The amount of power is indicated according to the brightness of the lights.

2. A lithium battery power detection device according to claim 1, characterized in that: The front end of the lithium battery is provided with a power supply terminal, and the power supply terminal includes a positive electrode connector and a negative electrode connector, and the positive electrode connector and the negative electrode connector are provided separately.

3. A lithium battery power detection device according to claim 1, characterized in that: The connection base is composed of an elliptical outer wall and an integral inner plate, and a connection hole is provided on the inner plate of the connection base, and the connection hole matches the power supply terminal; The outer wall is provided with 4 through holes, and each of the through holes is provided with a card seat, an elastic element, a pressing rod, a top block, a card slot and a card block. The pressing rod is inserted into the through hole, an elastic element is sleeved on the bottom of the pressing rod, a socket is also provided inside the outer wall, the pressing rod is arranged inside the socket, a slot is provided at the center position of the socket, one end of the pressing rod is connected to a top block, and the slot is movably connected to a block fixed on the cover plate.

4. A lithium battery power detection device according to claim 1, characterized in that: The cover plate is provided with four openings, and the LED lights leak out through the openings, and the power level is displayed by lighting up one of the openings.

5. A lithium battery power detection device according to claim 1, characterized in that: An insulating pad is bonded to one side of the circuit measuring lamp board by adhesive, and the other side of the insulating pad is bonded to the connecting seat.

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