Rechargeable battery with electric quantity display function

Abstract

The utility model relates to the field of rechargeable batteries, in particular to a rechargeable battery with an electric quantity display function, which comprises a rechargeable lithium battery, a main control module and an electric quantity display module, and the main control module comprises a main control MCU (Microprogrammed Control Unit) and a spring vibration switch SW. When a user wants to know the electric quantity of the battery, the state of the spring vibration switch SW is changed (from a normally open state to a closed state) as long as the user shakes or slightly touches the battery, and the master control MCU receives that the state of the spring vibration switch SW is changed. And the MCU drives the electric quantity display module to display the corresponding electric quantity of the battery according to the burning program, so that the problem that the traditional rechargeable battery cannot visually display the electric quantity is solved. According to the technical scheme, the user can quickly know the residual electric quantity of the battery only through simple shaking or light touch operation without depending on external equipment or tools, so that the use experience and convenience of the user are greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of rechargeable batteries, in particular to a rechargeable battery with a power display function. Background Art

[0002] Since lithium batteries have incomparable advantages over nickel-hydrogen batteries in terms of specific capacity, cycle life, safety, etc., 1.2.5.7 batteries made of lithium batteries are becoming more and more popular among users.

[0003] This type of battery uses a step-down circuit to reduce the voltage of 3.7 lithium batteries to 1.5V and then outputs it to replace the original 1.2 nickel-metal hydride batteries or 1.5V carbon or alkaline batteries. Since the voltage of the positive and negative terminals of the finished battery is always 1.5V, we cannot reflect the power of the lithium battery cell by measuring the voltage of the finished battery (the lithium battery is installed in the steel shell of the finished battery, and it is impossible to measure the voltage of the lithium battery to reflect the power of the cell). This is like buying a tram without a power display, and you can't disassemble the battery in the car and buy an instrument to measure how many kilometers the built-in battery in the car can still drive. This brings great inconvenience to users. Summary of the invention

[0004] To solve the above problems, the utility model provides a rechargeable battery with a power display function. Users do not need to rely on external devices or tools, but can quickly understand the remaining battery power through simple shaking or light touching operations, which greatly improves the user experience and convenience.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a rechargeable battery with a power display function, characterized in that it includes a rechargeable battery cell, a main control module and a power display module, wherein the main control module includes a main control MCU and a spring vibration switch SW, and the spring vibration switch SW detects the movement state of the rechargeable battery and outputs a sensing signal to the main control MCU, the main control MCU is electrically connected to the rechargeable battery cell and detects the remaining power of the rechargeable battery cell and obtains a power signal, wherein the main control MCU forms a driving signal based on the received power signal and the sensing signal, and drives the power display module.

[0006] When the user wants to know the battery power, he only needs to shake or touch the battery, and the spring vibration switch SW state will change (from normally open to closed). The main control MCU receives the change of the spring vibration switch SW state, and the MCU drives the power display module to display the corresponding battery power according to our burned program.

[0007] Furthermore, the main control module also includes a charge and discharge protection and voltage reduction function module, which includes a main control chip U1 and a peripheral circuit of the main control chip U1, wherein the peripheral circuit of the main control chip U1 includes a capacitor C1, a capacitor C2, a resistor R3, and an inductor L1, wherein the SW pin of the main control chip U1 is connected to one end of the capacitor C1 through the inductor L1, the other end of the capacitor C1 is grounded, the IEST pin of the main control chip U1 is grounded through the resistor R3, the BAT pin of the main control chip U1 is grounded through the capacitor C2, and the BAT pin of the main control chip U1 is connected to the positive pole of the rechargeable battery cell, and the negative pole of the rechargeable battery cell is grounded, wherein the OUT pin of the main control chip U1 outputs a 1.5V voltage, and pin 4 of the main control MCU is connected to the LED pin of the main control chip U1.

[0008] Furthermore, the power display module includes an LED D1, an LED D2, an LED D3, an LED D4, and a resistor R2, wherein pin 6 of the main control MCU is connected to the positive electrode of the LED D1 and the negative electrode of the LED D2 through the resistor R2, the negative electrode of the LED D1 is respectively connected to the positive electrode of the LED D2 and pin 1 of the main control MCU, the negative electrode of the LED D2 is respectively connected to the positive electrode of the LED D3 and the negative electrode of the LED D4, and the negative electrode of the LED D3 and the positive electrode of the LED D4 are both connected to pin 3 of the main control MCU.

[0009] Furthermore, one end of the spring vibration switch SW is grounded, and the other end is connected to pin 6 of the main control MCU through a resistor R1.

[0010] Furthermore, the positive electrode of the rechargeable battery cell is connected to pin 5 of the main control MCU through a resistor R4, and the positive electrode of the rechargeable battery cell is connected to pin 4 of the main control MCU through a resistor R5.

[0011] Furthermore, the rechargeable battery cell is a lithium battery cell.

[0012] Furthermore, it also includes a battery shell, which includes a positive electrode hardware cap, a negative electrode steel shell with a cylindrical structure, a PCBA board, and a plastic fixing covering the opening of the negative electrode steel shell, and the plastic fixing is provided with a plurality of indicator light holes aligned with the power display module, and a positive electrode mounting hole is arranged at the center of the plastic fixing, and the positive electrode hardware cap is mounted at the positive electrode mounting hole; wherein the rechargeable battery core is built into the negative electrode steel shell with a cylindrical structure, and the main control module is arranged on the PCBA board, and the negative electrode steel shell is electrically connected to the PCBA board through the negative electrode connecting piece, and the positive electrode steel cover is electrically connected to the PCBA board through the positive electrode connecting piece.

[0013] The beneficial effect of the utility model is that the solution solves the problem that traditional rechargeable batteries cannot intuitively display the power level by integrating the power display function. Users do not need to rely on external devices or tools. When users want to know the battery power level, they only need to shake or touch the battery, and the spring vibration switch SW state will change (from normally open to closed). The main control MCU receives the change in the spring vibration switch SW state. The MCU drives the power display module to display the corresponding battery power according to our burning program, which greatly improves the user experience and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a circuit diagram of the main control chip U1 and its peripheral circuits.

[0015] Figure 2 It is a schematic diagram of the main control MCU, power display module, spring vibration switch SW and its peripheral circuits.

[0016] Figure 3 It is a structural schematic diagram of a rechargeable battery with a power display function.

[0017] Description of the accompanying drawings: negative electrode steel shell 1, positive electrode hardware cap 2, plastic fixing part 3, indicator light hole 31. DETAILED DESCRIPTION

[0018] See also Figure 1-3 As shown, the utility model relates to a rechargeable battery with a power display function, including a rechargeable battery cell, a main control module and a power display module, wherein the main control module includes a main control MCU and a spring vibration switch SW, and the spring vibration switch SW detects the movement state of the battery and outputs a sensing signal to the main control MCU, the main control MCU is electrically connected to the rechargeable battery cell and detects the remaining power of the rechargeable battery cell and obtains a power signal, wherein the main control MCU forms a driving signal according to the received power signal and the sensing signal, and drives the power display module.

[0019] When the user wants to know the battery power, he only needs to shake or touch the battery, and the spring vibration switch SW state will change (from normally open to closed). The main control MCU receives the change of the spring vibration switch SW state. The MCU drives the power display module to display the corresponding battery power according to our burned program, which greatly improves the user experience and convenience.

[0020] Specifically, the main control module also includes a charge and discharge protection and voltage reduction function module, which includes a main control chip U1 and a peripheral circuit of the main control chip U1, wherein the peripheral circuit of the main control chip U1 includes capacitor C1, capacitor C2, resistor R3, and inductor L1, wherein the SW pin of the main control chip U1 is connected to one end of the capacitor C1 through the inductor L1, and the other end of the capacitor C1 is grounded, the IEST pin of the main control chip U1 is grounded through the resistor R3, the BAT pin of the main control chip U1 is grounded through the capacitor C2, and the BAT pin of the main control chip U1 is connected to the positive pole of the rechargeable battery cell, and the negative pole of the rechargeable battery cell is grounded, wherein the OUT pin of the main control chip U1 outputs a 1.5V voltage, and pin 4 of the main control MCU is connected to the LED pin of the main control chip U1.

[0021] In the main control module, the charge and discharge protection and voltage reduction function module plays a vital role. This module takes the main control chip U1 as the core and cooperates with its peripheral circuits to realize the charge and discharge protection and voltage conversion functions of the rechargeable battery cell.

[0022] The peripheral circuit design of the main control chip U1 is exquisite, including key components such as capacitor C1, capacitor C2, resistor R3 and inductor L1. Among them, the connection method between inductor L1 and capacitor C1 ensures the stability of the power supply. Through the filtering effect of inductor L1 on the current, the noise interference in the circuit can be effectively reduced and the stability of the overall circuit can be improved. At the same time, the other end of capacitor C1 is grounded, which plays a role in stabilizing the voltage. The IEST pin of the main control chip U1 is grounded through resistor R3. This design not only simplifies the circuit structure, but also helps to improve the working stability of the chip. The BAT pin is grounded through capacitor C2 and connected to the positive pole of the rechargeable battery cell. This design can realize real-time monitoring of the battery cell voltage, providing a basis for subsequent power detection.

[0023] In addition, the OUT pin of the main control chip U1 is responsible for outputting a voltage of 1.5V, and pin 4 of the main control MCU is connected to the LED pin of the main control chip U1. This connection enables the main control MCU to drive the power display module by controlling the LED pin according to the received power signal and sensing signal, thereby intuitively displaying the remaining power of the battery.

[0024] Furthermore, the power display module includes an LED D1, an LED D2, an LED D3, an LED D4, and a resistor R2, wherein pin 6 of the main control MCU is connected to the positive electrode of the LED D1 and the negative electrode of the LED D2 through the resistor R2, the negative electrode of the LED D1 is respectively connected to the positive electrode of the LED D2 and pin 1 of the main control MCU, the negative electrode of the LED D2 is respectively connected to the positive electrode of the LED D3 and the negative electrode of the LED D4, and the negative electrode of the LED D3 and the positive electrode of the LED D4 are both connected to pin 3 of the main control MCU.

[0025] Furthermore, one end of the spring vibration switch SW is grounded, and the other end is connected to pin 6 of the main control MCU through a resistor R1.

[0026] Furthermore, the positive electrode of the rechargeable battery cell is connected to pin 5 of the main control MCU through a resistor R4, and the positive electrode of the rechargeable battery cell is connected to pin 4 of the main control MCU through a resistor R5.

[0027] Furthermore, the rechargeable battery cell is a lithium battery cell.

[0028] Furthermore, a rechargeable battery with a power display function also includes a battery shell, which includes a positive electrode hardware cap 2, a negative electrode steel shell 1 with a cylindrical structure, a PCBA board, and a plastic fixing part 3 covering the opening of the negative electrode steel shell 1, and the plastic fixing part 3 is provided with a plurality of indicator light holes 31 aligned with the power display module, and a positive electrode fitting hole is provided at the center of the plastic fixing part 3, and the positive electrode hardware cap 2 is fitted at the positive electrode fitting hole; wherein the rechargeable battery core is built into the negative electrode steel shell 1 with a cylindrical structure, and the main control module is arranged on the PCBA board, and the negative electrode steel shell 1 is electrically connected to the PCBA board through the negative electrode connecting piece, and the positive electrode steel cover is electrically connected to the PCBA board through the positive electrode connecting piece.

[0029] Specific working principle:

[0030] In this specific embodiment, the rechargeable battery is in the shape of a cylinder, which can correspond to the size specifications of D-type (size 1), C-type (size 2), AA (size 5), and AAA (size 7) rechargeable batteries commonly used in the market.

[0031] In this specific embodiment, the spring vibration switch SW is an SMT miniature spring vibration switch, which can sense vibration in all directions. When it is touched by an external force and reaches a corresponding vibration force or the moving speed reaches a centrifugal force, the conductive pin is instantly turned on and is in an instantaneous ON state. When the external force disappears, the switch returns to an open OFF state.

[0032] Such as circuit schematics and battery structure diagrams

[0033] Functions of the main control chip U1:

[0034] 1: Reduce the voltage of the cylindrical lithium battery cell in the battery steel shell to 1.5V and output it to the positive electrode of the finished battery.

[0035] 2: Lithium battery charging and discharging protection

[0036] 3: Charging status detection

[0037] Main MCU functions:

[0038] Detect the voltage of the built-in lithium battery in real time, and control 4 LED lights through software to reflect the real-time power level of the built-in lithium battery.

[0039] Among them, the 1st pin of the main control MCU is connected to the cathode and anode of the light-emitting diode D1, the 2nd pin is grounded, and the 3rd pin is connected to the cathode and anode of the light-emitting diode D3 and D4. The 4th pin is connected to the positive electrode of the lithium battery through the resistor R5, and the 5th pin is connected to the positive electrode of the lithium battery through the resistor R4. The 6th pin is connected to R1 and R2. R4 plays a current limiting role to protect the MCU. R5 introduces the lithium battery voltage into the internal A / D circuit of the MCU to detect the battery cell voltage in real time. R1 is the current limiting resistor of SW. R2 is the current limiting resistor of D1, D2, D3, and D4, and C3 is the filter capacitor.

[0040] Specific description: MCU plays a core control role in the power display module. Through the connection with the peripheral circuit, it realizes the precise control of the light-emitting diode and the real-time detection of the battery voltage. The following is a further analysis of the MCU and its peripheral circuits:

[0041] Pin 2 of the MCU is grounded, providing a stable reference level for the circuit. Pins 4 and 5 are connected to the positive electrode of the lithium battery through resistors R5 and R4 respectively. These two resistors play an important role in the circuit. R4, as a current limiting resistor, can limit the current entering the MCU, thereby protecting the MCU from damage caused by excessive current. R5 introduces the voltage of the lithium battery into the A / D circuit inside the MCU, allowing the MCU to detect the battery voltage in real time and accurately determine the battery power.

[0042] Pin 6 of the MCU is connected to resistors R1 and R2, where R1 is used as the current limiting resistor of SW to limit the current generated by the spring vibration switch SW. R2 is used as the current limiting resistor of D1, D2, D3, and D4 to ensure the current stability of the light-emitting diodes during normal operation to avoid damage due to excessive current. In addition, C3 is used as a filter capacitor to filter out high-frequency noise in the circuit and ensure that the MCU receives stable voltage and current signals, thereby improving the stability and reliability of the entire system.

[0043] Specific usage: When you get a battery in your hand, shake it or touch the battery lightly, the spring vibration switch SW will close instantly from the normally open state and then return to the normally open state. At this time, MCU detects the change of SW state through pin 6. MCU lights up the corresponding LED light according to the table below according to the burned program to reflect the real-time power of the internal lithium battery in real time.

[0044] The corresponding table of indicator light display mode and lithium battery cell voltage is as follows:

[0045]

[0046] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A rechargeable battery with a power display function, characterized in that: The invention comprises a rechargeable battery cell, a main control module and a power display module, wherein the main control module comprises a main control MCU and a spring vibration switch SW, and the spring vibration switch SW detects the movement state of the rechargeable battery and outputs a sensing signal to the main control MCU, the main control MCU is electrically connected to the rechargeable battery cell and detects the remaining power of the rechargeable battery cell and obtains a power signal, wherein the main control MCU forms a driving signal according to the received power signal and the sensing signal, and drives the power display module.

2. A rechargeable battery with a power display function according to claim 1, characterized in that: The main control module also includes a charge and discharge protection and voltage reduction function module, which includes a main control chip U1 and a peripheral circuit of the main control chip U1, wherein the peripheral circuit of the main control chip U1 includes a capacitor C1, a capacitor C2, a resistor R3, and an inductor L1, wherein the SW pin of the main control chip U1 is connected to one end of the capacitor C1 through the inductor L1, the other end of the capacitor C1 is grounded, the IEST pin of the main control chip U1 is grounded through the resistor R3, the BAT pin of the main control chip U1 is grounded through the capacitor C2, and the BAT pin of the main control chip U1 is connected to the positive pole of the rechargeable battery cell, and the negative pole of the rechargeable battery cell is grounded, wherein the OUT pin of the main control chip U1 outputs a 1.5V voltage, and pin 4 of the main control MCU is connected to the LED pin of the main control chip U1.

3. A rechargeable battery with a power display function according to claim 1, characterized in that: The power display module includes a light-emitting diode D1, a light-emitting diode D2, a light-emitting diode D3, a light-emitting diode D4, and a resistor R2, wherein pin 6 of the main control MCU is connected to the positive electrode of the light-emitting diode D1 and the negative electrode of the light-emitting diode D2 through the resistor R2, the negative electrode of the light-emitting diode D1 is respectively connected to the positive electrode of the light-emitting diode D2 and pin 1 of the main control MCU, the negative electrode of the light-emitting diode D2 is respectively connected to the positive electrode of the light-emitting diode D3 and the negative electrode of the light-emitting diode D4, and the negative electrode of the light-emitting diode D3 and the positive electrode of the light-emitting diode D4 are both connected to pin 3 of the main control MCU.

4. A rechargeable battery with a power display function according to claim 3, characterized in that: One end of the spring vibration switch SW is grounded, and the other end is connected to pin 6 of the main control MCU through a resistor R1.

5. A rechargeable battery with a power display function according to claim 4, characterized in that: The positive electrode of the rechargeable battery cell is connected to the No. 5 pin of the main control MCU through the resistor R4, and the positive electrode of the rechargeable battery cell is connected to the No. 4 pin of the main control MCU through the resistor R5.

6. A rechargeable battery with a power display function according to claim 5, characterized in that: The rechargeable battery cell is a lithium battery cell.

7. A rechargeable battery with a power display function according to claim 6, characterized in that: It also includes a battery shell, which includes a positive electrode hardware cap, a negative electrode steel shell with a cylindrical structure, a PCBA board, and a plastic fixing piece covering the opening of the negative electrode steel shell, and the plastic fixing piece is provided with a plurality of indicator light holes aligned with the power display module, and a positive electrode fitting hole is provided at the center of the plastic fixing piece, and the positive electrode hardware cap is fitted at the positive electrode fitting hole; wherein the rechargeable battery core is built into the negative electrode steel shell with a cylindrical structure, and the main control module is arranged on the PCBA board, and the negative electrode steel shell is electrically connected to the PCBA board through the negative electrode connecting piece, and the positive electrode steel cover is electrically connected to the PCBA board through the positive electrode connecting piece.

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