CN202421474U - A LCD battery power display circuit - Google Patents

Abstract

The utility model relates to a LCD battery power display circuit, including electric core, still include with electric core is in voltage divider network (C), host system (B) and LCD drive module and the setting of electricity connection in proper order the last LCD display screen of battery case. The LCD battery power display circuit can provide power indication for non-intelligently managed electric equipment.

Description

A LCD battery power display circuit

technical field

The utility model relates to a battery management circuit, in particular to an LCD (Liquid Crystal Display, Liquid Crystal Display) battery power display circuit, especially for lithium-ion rechargeable batteries.

Background technique

The emergence of rechargeable lithium-ion batteries has brought great convenience to people's lives. Rechargeable lithium-ion batteries are widely used in mobile phones, digital cameras, medical equipment, laptop computers, audio-visual equipment, power tools and other products.

For some non-intelligently managed electrical equipment (such as electric drills, advanced bicycle lighting systems), it does not have battery power metering and power display parts. For end users, it is very necessary to know the battery power status in time, so that people can be reminded to charge the battery in time, so as not to affect the normal work of the tools used due to the lack of battery power. Therefore, it is very meaningful for engineers and technicians to design a real-time power display circuit structure for their own battery products, add humanized functions to their own products, and improve the market competitiveness of products.

Utility model content

The technical problem to be solved by the utility model is how to provide an LCD battery power display circuit, which can directly display the battery power.

The technical problem of the utility model is solved in the following way: build a kind of LCD battery power display circuit, comprise electric core, also comprise the voltage divider network that is electrically connected with described electric core in turn, main control module, LCD drive module and be arranged on described battery housing on the LCD display.

According to the LCD battery power display circuit provided by the utility model, the main control module includes a single-chip microcomputer.

According to the LCD battery power display circuit provided by the utility model, it also includes a voltage stabilizing module or a voltage regulator electrically connected between the single-chip microcomputer and the battery core.

According to the LCD battery power display circuit provided by the utility model, the voltage dividing network includes a plurality of resistors.

According to the LCD battery power display circuit provided by the utility model, the voltage dividing network further includes a capacitor.

According to the lithium-ion battery LCD power display circuit provided by the utility model, the LCD driving module includes an LCD driving integrated circuit.

According to the LCD battery power display circuit provided by the utility model, the LCD display screen is a strip-shaped segmented LCD display screen.

According to the LCD battery power display circuit provided by the utility model, the battery is any one of alkaline zinc-manganese battery, cadmium-nickel battery, hydrogen-nickel battery, lithium ion battery or lithium battery.

According to the LCD battery power display circuit provided by the utility model, the battery is a rechargeable battery.

The LCD battery power display circuit provided by the utility model integrates power indication, power detection and battery, and has the following advantages compared with the prior art:

1. Non-intelligently managed electrical equipment provides power indication;

2. After the LCD is lit for 3 seconds, it will go out by itself to achieve the power saving function.

Description of drawings

The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a schematic diagram of the internal circuit structure of the LCD power display circuit of the lithium-ion battery of the present invention.

Detailed ways

At first, illustrate the utility model idea:

With a single-chip microcomputer with a market advantage in performance-price ratio, through the analog-to-digital (AD) detection of the battery voltage, the single-chip microcomputer comprehensively measures the relationship between the battery voltage and the relative ratio of the battery capacity, and finally the relative percentage of the capacity is segmented through the LCD Shown is the core and key of the present utility model.

Second, further describe the utility model in detail in conjunction with specific embodiments:

(1) Working principle

LCD is a liquid crystal device that needs to be driven in a special way. It transmits the battery capacity information to the LCD driving circuit in the form of information exchange, and finally displays the power.

(2) Circuit

The internal control circuit of the battery with charge display in the specific embodiment of the utility model has a structure as shown in Figure 1, including four major blocks: a voltage stabilizing module A, a main control module B, a voltage dividing network C and a liquid crystal display part D, wherein:

Voltage regulator module A is used for the power supply of the single-chip microcomputer. It is composed of a low-loss high-stability high-performance voltage regulator U1 and capacitors C1, C2, C3 and C4. It outputs a 3.3V regulated power supply to supply the single-chip microcomputer U2 to work;

The main control module B is composed of single-chip microcomputer U2 (SN78P2711), capacitor C7, resistors R4, R5, R6 and R7. The single-chip microcomputer U2 is the intelligent core device of the entire power meter display. The 10th pin of the single-chip microcomputer is the command transmission network; the 3rd, 5th, and 6th pins of the single-chip are the communication sequence control network. The single-chip microcomputer transmits the measurement and analysis data of the battery power to the LCD driver module C through the communication network. The single-chip microcomputer program designed by the software personnel supports the full-automatic operation of the single-chip microcomputer. The central modules of software control include: modulus A/D conversion module; communication command module; I/O control module and energy-saving control command module;

The voltage divider network C is composed of high-precision resistors R1, R2 and capacitor C5, and the battery voltage is input to the 11th pin of the single-chip microcomputer U2 according to a high-stability fixed voltage divider ratio for processing by the single-chip microcomputer;

The liquid crystal display part D is composed of a liquid crystal driving integrated circuit U3 (HT1621B), a resistor R3 and a liquid crystal display LCD, wherein: the liquid crystal driving integrated circuit U3 (HT1621B) and the resistor R3 form a liquid crystal driving module. The liquid crystal display LCD is divided into 5 segments to display the power according to the display gradient of 20% of the power.

Finally, within the scope of understanding of those skilled in the art and within the claims of the utility model, various changes belong to the protection scope of the utility model.

Claims (8)

1. The utility model provides a LCD battery power display circuit, includes electric core, its characterized in that still include with voltage division network (C), host system (B) and LCD drive module and the setting that electric core electricity in proper order is connected are in LCD display screen on the battery case.

2. The LCD battery power display circuit of claim 1, wherein the main control module (B) comprises a single-chip microcomputer (U2).

3. The LCD battery power display circuit of claim 2, further comprising a voltage stabilizing module (A) or a voltage stabilizer (U1) electrically connected between the single chip microcomputer (U2) and the battery core.

4. The LCD battery level display circuit of claim 1, wherein the voltage divider network (C) comprises a plurality of resistors (R1, R2).

5. The LCD battery level display circuit of claim 5, wherein the voltage divider network (C) further comprises a capacitor (C5).

6. The LCD battery power display circuit of claim 1, wherein the LCD driver module comprises an LCD driver integrated circuit (U3).

7. The LCD cell power display circuit of claim 1, wherein the LCD display screen is an elongated segmented LCD display screen.

8. The LCD battery level display circuit of claim 1, wherein the battery is a rechargeable battery.

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