Electric quantity display circuit and circuit board

Abstract

The utility model relates to the technical field of circuit boards, in particular to an electric quantity display circuit and a circuit board, and the electric quantity display circuit comprises a battery pack, an electric quantity detection circuit, a master control circuit and an indicating lamp circuit, the electric quantity display circuit board comprises an electric quantity detection board and an electric quantity display board. The electric quantity detection circuit is used for collecting the electric quantity of the battery pack and outputting detection signals; the main control circuit is used for acquiring a detection signal of the electric quantity detection circuit and outputting a corresponding electric quantity display control signal; the indicating lamp circuit is used for displaying the electric quantity of the battery pack according to the received electric quantity display control signal. The voltameter collects the electric quantity of the battery pack through the control chip and outputs a detection signal to the master control integrated chip, and a control port of the master control integrated chip is connected with an interface of the indicator lamp and used for controlling whether the indicator lamp is turned on or not. Therefore, the technical problems of high failure rate and unstable display state of the electric quantity display of the battery pack in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit boards, in particular to a power display circuit and a circuit board. Background Art

[0002] As a new generation of battery packs, lithium-ion battery packs have the advantages of high energy density, long service life, and environmental protection, and are therefore favored by many users. At present, lithium-ion battery packs are widely used in handheld devices, communication radio stations, base station facilities, Internet of Things equipment and other industries. The use of lithium-ion battery packs in different fields is different, so the requirements for battery packs are also different. However, most fields require battery packs to display the power level, so that users can check the remaining power at any time to replace new battery packs and prevent equipment downtime.

[0003] The existing lithium battery pack power display circuit is relatively complex, the failure rate is relatively high, and the display state is unstable. Utility Model Content

[0004] The utility model aims to provide a power display circuit and a circuit board, which can solve the technical problems of high failure rate and unstable display state of battery pack power display in the prior art.

[0005] In order to achieve the above purpose, the utility model designs a power display circuit, including a battery pack, a power detection circuit, a main control circuit, and an indicator light circuit;

[0006] The power detection circuit is connected to the battery pack, and is used to collect the power of the battery pack and output a detection signal;

[0007] The main control circuit is connected to the power detection circuit, and the main control circuit is used to obtain the detection signal of the power detection circuit and output the corresponding power display control signal;

[0008] The indicator light circuit is connected to the main control circuit, and the indicator light circuit is used to display the battery pack power according to the received power display control signal.

[0009] As a preferred solution, the power detection circuit includes a control chip, a power meter and its peripheral circuits.

[0010] As a preferred solution, the main control circuit includes a main control integrated chip and its peripheral circuits.

[0011] As a preferred solution, the indicator light circuit includes an indicator light and a resistor connected in series with the indicator light, and the indicator light is connected to an indicator light control port of a main control circuit via an indicator light interface.

[0012] Furthermore, there are multiple indicator lights, each indicator light is connected in series with a resistor to form an indicator light unit, and multiple indicator light units are connected in parallel.

[0013] Furthermore, the indicator light circuit further comprises a key switch, and the key switch is connected in parallel with the plurality of indicator light units. When the key switch is closed, the power level of the battery pack can be displayed.

[0014] The utility model also designs a power display circuit board, including a power detection board and a power display board. The power detection board is provided with a control chip and a power meter, and the power display board is provided with a main control integrated chip and an indicator light. The power meter collects the power of the battery pack through the control chip and outputs a detection signal to the main control integrated chip. The control port of the main control integrated chip is connected to the interface of the indicator light for controlling whether the indicator light is lit or not.

[0015] As a preferred solution, there are multiple indicator lights, each indicator light is connected in series with a resistor to form an indicator light unit, and multiple indicator light units are arranged side by side on the power display board.

[0016] As a preferred solution, the power display panel is further provided with a key switch, and the key switch is arranged on the side of the indicator light unit.

[0017] Beneficial effects of the utility model:

[0018] The utility model provides a power display circuit and circuit board, wherein the power detection circuit is used to collect the power of a battery pack and output a detection signal; the main control circuit is used to obtain the detection signal of the power detection circuit and output a corresponding power display control signal; the indicator light circuit is used to display the power of the battery pack according to the received power display control signal. The power meter collects the power of the battery pack through a control chip and outputs a detection signal to the main control integrated chip. The control port of the main control integrated chip is connected to the interface of the indicator light to control whether the indicator light is on or not.

[0019] Therefore, the utility model can solve the technical problems in the prior art that the failure rate of the battery pack power display is high and the display state is unstable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural block diagram of the utility model.

[0021] Figure 2 This is the circuit schematic diagram of the power detection circuit.

[0022] Figure 3 This is the circuit schematic diagram of the main control circuit.

[0023] Figure 4 This is the circuit schematic diagram of the indicator light circuit.

[0024] Figure 5 This is the wiring diagram for the power display board.

[0025] Description of reference numerals:

[0026] Fuel meter U5, key switch SW1, main control integrated chip U7;

[0027] Indicator lights: LED1, LED2, LED3, LED4, LED5;

[0028] Resistors: R72, R73, R76, R77, R78. DETAILED DESCRIPTION

[0029] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0030] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The utility model provides a power display circuit and circuit board. The power display circuit includes a battery pack, a power detection circuit, a main control circuit, and an indicator light circuit; the power display circuit board includes a power detection board and a power display board. The power detection circuit is used to collect the power of the battery pack and output a detection signal; the main control circuit is used to obtain the detection signal of the power detection circuit and output a corresponding power display control signal; the indicator light circuit is used to display the power of the battery pack according to the received power display control signal. The power meter collects the power of the battery pack through the control chip and outputs a detection signal to the main control integrated chip. The control port of the main control integrated chip is connected to the interface of the indicator light to control whether the indicator light is on or not. Therefore, the utility model can solve the technical problems of high failure rate and unstable display state of battery pack power display in the prior art.

[0033] The utility model relates to a power display circuit, which comprises a battery pack, a power detection circuit, a main control circuit and an indicator light circuit.

[0034] The power detection circuit is connected to the battery pack and is used to collect the power of the battery pack and output a detection signal; the power detection circuit includes a control chip, a power meter and its peripheral circuits.

[0035] The main control circuit is connected to the power detection circuit, and is used to obtain the detection signal of the power detection circuit and output the corresponding power display control signal; the main control circuit includes a main control integrated chip and its peripheral circuits.

[0036] The indicator light circuit is connected to the main control circuit, and the indicator light circuit is used to display the battery pack power according to the received power display control signal.

[0037] The indicator light circuit includes an indicator light, a resistor connected in series with the indicator light, and a key switch; the indicator light is connected to the indicator light control port of the main control circuit through an indicator light interface. There are multiple indicator lights, each indicator light is connected in series with a resistor to form an indicator light unit, and multiple indicator light units are connected in parallel. The key switch is connected in parallel with the multiple indicator light units. When the key switch is closed, the battery pack power can be displayed.

[0038] The utility model also relates to a power display circuit board, including a power detection board and a power display board. The power detection board is provided with a control chip and a power meter, and the power display board is provided with a main control integrated chip, an indicator light, and a key switch. The power meter collects the power of the battery pack through the control chip, and outputs a detection signal to the main control integrated chip. The control port of the main control integrated chip is connected to the interface of the indicator light, and is used to control whether the indicator light is on or not. There are multiple indicator lights, each of which is connected in series with a resistor to form an indicator light unit, and multiple indicator light units are arranged side by side on the power display board. The key switch is arranged on the side of the indicator light unit. Each indicator light forms a series circuit group with a resistor, and is then connected in parallel with other series circuit groups. When the battery pack is low on power, some ports of the chip have no level output, resulting in no current flowing through some series circuit groups, thus becoming an open circuit, and the corresponding indicator light is not on.

[0039] The power detection board and power display board are both double-sided PCB boards, with the top wiring diagram on the front and the bottom wiring diagram on the back. The output voltage is 3.3V.

[0040] In this embodiment, there are five indicator lights, corresponding to five levels of power display percentage, namely 100%, 80%, 60%, 40% and 20%. Each indicator light 21 corresponds to 20% power. When all the indicator lights are on, it shows that the current power of the battery pack is 100%.

[0041] Pins 7 and 8 of the power meter U5 on the power detection board sample current signals through current-sensing resistors R67 and R66, sample voltage signals of the battery pack through pin 4, and sample temperature signals through pin 9. After internal calculation, the power, current, voltage, temperature and other information of the battery pack are obtained, and then communicated and reported with the chip U7 on the power display board. The chip U7 processes the obtained power information and drives the indicator lights LED1, LED2, LED3, LED4 and LED5 to light up according to the remaining power percentage through pins 13, 14, 15, 19 and 20 of the chip U7. Each pin corresponds to each indicator light one by one.

[0042] When the chip U7 obtains through calculation that the battery power is below 20%, the P23 port (corresponding to pin 13) of the chip U7 outputs a low level, and an indicator LED1 lights up.

[0043] When the chip U7 obtains that the battery power is 20%-40%, the P23 and P24 ports (corresponding to pins 13 and 14 respectively) of the chip U7 output a low level, and the two indicator lights LED1 and LED2 are both lit.

[0044] By analogy, when chip U7 obtains that the battery pack power is 100%, the P23, P24, P25, P32, and P33 ports of chip U7 (corresponding to pins 13, 14, 15, 19, and 20 respectively) output low levels, and the five indicator lights LED1, LED2, LED3, LED4, and LED5 are all lit.

[0045] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A power display circuit, characterized in that: Including battery pack, power detection circuit, main control circuit, indicator light circuit; The power detection circuit is connected to the battery pack, and is used to collect the power of the battery pack and output a detection signal; The main control circuit is connected to the power detection circuit, and the main control circuit is used to obtain the detection signal of the power detection circuit and output the corresponding power display control signal; The indicator light circuit is connected to the main control circuit, and the indicator light circuit is used to display the battery pack power according to the received power display control signal; The indicator light circuit includes an indicator light, a key switch, and a resistor connected in series with the indicator light, and the indicator light is connected to the indicator light control port of the main control circuit through an indicator light interface; There are multiple indicator lights, each indicator light is connected in series with a resistor to form an indicator light unit, and multiple indicator light units are connected in parallel; The key switch is connected in parallel with a plurality of indicator light units.

2. A power display circuit according to claim 1, characterized in that: The electric quantity detection circuit comprises a control chip, an electric quantity meter and its peripheral circuits.

3. A power display circuit according to claim 1, characterized in that: The main control circuit includes a main control integrated chip and its peripheral circuits.

4. A power display circuit board, characterized in that: It includes a power detection board and a power display board. The power detection board is provided with a control chip and a power meter. The power display board is provided with a main control integrated chip and an indicator light. The power meter collects the power of the battery pack through the control chip and outputs a detection signal to the main control integrated chip. The control port of the main control integrated chip is connected to the interface of the indicator light to control whether the indicator light is on or not.

5. A power display circuit board according to claim 4, characterized in that: There are multiple indicator lights, each indicator light is connected in series with a resistor to form an indicator light unit, and multiple indicator light units are arranged side by side on the power display board.

6. A power display circuit board according to claim 5, characterized in that: The power display panel is also provided with a key switch, and the key switch is arranged on the side of the indicator light unit.

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