A control circuit capable of synchronously charging multiple groups of batteries

Abstract

This invention provides a control circuit capable of simultaneously charging multiple battery packs, including a power supply, a main control circuit for simultaneous charging of multiple battery packs, and multiple charging circuits. The power supply is connected to the main control circuit for simultaneous charging of multiple battery packs. The output of the main control circuit is connected to the input of each of the multiple charging circuits. Each charging circuit's input is also connected to a charging power supply, and each charging circuit's output can be connected to a rechargeable lithium-ion battery. The output of the main control circuit is also connected to an LED indicator and a cooling fan assembly. The main control circuit can simultaneously control the multiple charging circuits to charge the rechargeable lithium-ion batteries. The advantages of this invention are: it can simultaneously charge multiple lithium-ion battery packs and display the charging status of each battery pack.

Description

Technical Field

[0001] This utility model relates to the field of charging circuit technology, specifically to a control circuit capable of simultaneously charging multiple groups of batteries. Background Technology

[0002] A battery is a device that converts chemical energy into electrical energy. It contains an electrolyte solution and metal electrodes, forming a cup, tank, or other container or composite container that generates an electric current. It has a positive and a negative electrode. With technological advancements, the term "battery" now generally refers to any small device that generates electrical energy, such as a solar cell. The main performance parameters of a battery include electromotive force, capacity, specific energy, and resistance. Using batteries as an energy source provides a stable voltage, stable current, long-term stable power supply, and minimal susceptibility to external influences. Batteries are simple in structure, portable, easy to charge and discharge, unaffected by external climate and temperature, and offer stable and reliable performance, playing a significant role in various aspects of modern life.

[0003] A rechargeable battery is a battery that can be charged by an external voltage input. It is a type of battery that can be reused and recharged by an external power source for repeated use. Compared to traditional batteries, rechargeable batteries have higher energy density, provide stable voltage and current output, and have a longer lifespan. Common types include nickel-metal hydride (NiMH) batteries and lithium-ion batteries.

[0004] In existing technologies, rechargeable lithium-ion batteries need to be recharged after their power is depleted before they can be used again. However, current lithium-ion battery charging devices generally only support charging one group of lithium-ion batteries at a time, and do not support charging multiple groups of lithium-ion batteries simultaneously. Since each group of batteries takes a long time to charge, and sometimes the demand for lithium-ion batteries is relatively frequent, this charging method that only supports charging one group of lithium-ion batteries can only charge one group at a time when charging multiple groups of lithium-ion batteries, which is inefficient and results in a poor user experience. Utility Model Content

[0005] To address the problems in the prior art, this utility model provides a control circuit capable of simultaneously charging multiple battery packs. By incorporating a cooperating power supply, a main control circuit for simultaneous charging of multiple battery packs, and multiple charging circuits within the control circuit, it is possible to charge multiple lithium-ion batteries simultaneously and display the charging status of each lithium-ion battery pack. This significantly improves the user experience and solves the problem of low charging efficiency and poor user experience caused by the inability to charge multiple lithium-ion batteries simultaneously in the prior art.

[0006] This utility model provides a control circuit capable of simultaneously charging multiple battery packs, including a power supply, a main control circuit for simultaneous charging of multiple battery packs, and multiple charging circuits. The output terminal of the power supply is connected to the main control circuit for simultaneous charging of multiple battery packs. The output terminal of the main control circuit for simultaneous charging of multiple battery packs is connected to the input terminals of the multiple charging circuits. The input terminal of each charging circuit is also connected to a charging power supply. The output terminal of each charging circuit can be connected to a rechargeable lithium-ion battery for charging. The output terminal of the main control circuit for simultaneous charging of multiple battery packs is also connected to an LED display group and a cooling fan assembly. The LED display group can display the charging status of each charging circuit. The main control circuit for simultaneous charging of multiple battery packs can simultaneously control the multiple charging circuits to charge the rechargeable lithium-ion batteries and control the LED display group to display the charging status of each lithium-ion battery.

[0007] This utility model is further improved by including a main control chip U2 and a capacitor C25 in the main control circuit for synchronous charging of multiple battery packs. The main control chip U2 has 36 pins. Pin 33 of the main control chip U2 is connected to one end of the capacitor C25 and the output terminal of the power supply. Pins 27, 20, 28, and 19 of the main control chip U2 are respectively connected to the input terminals of multiple charging circuits. Pins 1 and 36 of the main control chip U2 are connected to the input terminal of the LED display group. Pin 3 of the main control chip U2 is connected to the input terminal of the cooling fan assembly. The other end of the capacitor C25 is grounded.

[0008] This utility model is further improved, and the charging circuit includes a fuse resistor F1, an inductor L1, a resistor R6, a field-effect transistor Q2, a resistor R9, a diode D2, a resistor R7, a field-effect transistor Q1, a resistor R5, and a diode D1. One end of the fuse resistor F1 can be connected to the charging power supply, and the other end of the fuse resistor F1 is connected to one end of the inductor L1. The other end of the inductor L1 is connected to one end of the resistor R6, and the other end of the resistor R6 is connected to the drain of the field-effect transistor Q2. The gate of the field-effect transistor Q2 is connected to one end of the resistor R9 and the anode of the diode D2. The resistor R9... The other end is connected to the negative terminal of the diode D2 and pin 27 of the main control chip U2. The source of the field-effect transistor Q2 is connected to pin 28 and pin 19 of the main control chip U2 and the source of the field-effect transistor Q1. The gate of the field-effect transistor Q1 is connected to one end of the resistor R7 and the positive terminal of the diode D1. The other end of the resistor R7 is connected to the negative terminal of the diode D1 and pin 20 of the main control chip U2. The drain of the field-effect transistor Q1 is connected to one end of the resistor R5. The other end of the resistor R5 can be connected to a rechargeable lithium-ion battery for charging.

[0009] This utility model is further improved by including capacitor C3, capacitor C5, capacitor C6, resistor R11, and diode D3 in the charging circuit. One end of capacitor C3 is connected to one end of capacitor C5, one end of capacitor C6, one end of resistor R11, the negative terminal of diode D3, the other end of resistor R5, and a rechargeable lithium-ion battery. The other ends of capacitor C3, capacitor C5, capacitor C6, resistor R11, and diode D3 are grounded.

[0010] This utility model is further improved, and the main control chip U2 is model number SC8808.

[0011] In a further improvement to this invention, the power supply is a 3.3V constant voltage power supply.

[0012] This utility model is further improved by having four charging circuits.

[0013] Compared with the prior art, the beneficial effects of this utility model are: it provides a control circuit capable of simultaneously charging multiple battery packs. By setting up mutually cooperating power supplies, a main control circuit for simultaneous charging of multiple battery packs, and multiple charging circuits in the control circuit, the main control circuit can simultaneously control multiple charging circuits to charge rechargeable lithium-ion batteries, and control LED display groups to display the charging status of each lithium-ion battery pack. It can achieve simultaneous charging of multiple lithium-ion batteries and display of the charging status of each lithium-ion battery pack. The charging control conforms to the charging characteristic curve of lithium-ion batteries and has multiple protections. The LED display groups can intuitively observe the charging status of lithium-ion batteries, which can improve the charging safety of lithium-ion batteries while ensuring charging efficiency, greatly improve the user experience, and solve the problem of low charging efficiency and poor user experience caused by the inability to charge multiple lithium-ion batteries simultaneously in the prior art. Attached Figure Description

[0014] To more clearly illustrate the solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a block diagram illustrating the principle of a control circuit capable of simultaneously charging multiple battery groups according to the present invention.

[0016] Figure 2 The circuit diagram is for the main control circuit of the multi-battery pack synchronous charging of this utility model.

[0017] Figure 3 This is a circuit diagram of a charging circuit according to the present invention. Detailed Implementation

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order.

[0019] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0021] like Figures 1-3 As shown, this utility model provides a control circuit capable of simultaneously charging multiple battery packs. It includes a power supply, a main control circuit for simultaneous charging of multiple battery packs, and multiple charging circuits. The output of the power supply is connected to the main control circuit, and the output of the main control circuit is connected to the input of each charging circuit. Each charging circuit has an input connected to a charging power supply, and each charging circuit's output can be connected to a rechargeable lithium-ion battery. The output of the main control circuit also includes an LED indicator and a cooling fan assembly. The LED indicator displays the charging status of each charging circuit. There are four charging circuits. In this embodiment, the main control circuit can simultaneously control multiple charging circuits to charge rechargeable lithium-ion batteries and control the LED indicator to display the charging status of each battery pack. This allows for simultaneous charging of multiple lithium-ion batteries and simultaneous display of their charging status. Furthermore, it improves charging safety while ensuring charging efficiency, significantly enhancing the user experience.

[0022] like Figure 2As shown, the main control circuit for synchronous charging of multiple battery packs includes a main control chip U2 and a capacitor C25. The main control chip U2 is an SC8808, powered by a 3.3V constant voltage power supply. The main control chip U2 has 36 pins. Pin 33 of the main control chip U2 is connected to one end of capacitor C25 and the output terminal of the power supply. Pins 27, 20, 28, and 19 of the main control chip U2 are respectively connected to the input terminals of multiple charging circuits. Pins 1 and 36 of the main control chip U2 are connected to the input terminal of the LED display group. Pin 3 of the main control chip U2 is connected to the input terminal of the cooling fan assembly. The other end of capacitor C25 is grounded. In this embodiment, the main control circuit for synchronous charging of multiple battery packs is used to simultaneously control multiple charging circuits to charge rechargeable lithium-ion batteries, control the LED display group to show the charging status of each lithium-ion battery, and control the cooling fan assembly to dissipate heat when the charging temperature exceeds a set threshold.

[0023] like Figure 3 As shown, the charging circuit includes a fuse resistor F1, an inductor L1, a resistor R6, a field-effect transistor Q2, a resistor R9, a diode D2, a resistor R7, a field-effect transistor Q1, a resistor R5, and a diode D1. One end of the fuse resistor F1 is connected to the charging power supply. The other end of F1 is connected to one end of the inductor L1, and the other end of the inductor L1 is connected to one end of the resistor R6. The other end of the resistor R6 is connected to the drain of the field-effect transistor Q2. The gate of the field-effect transistor Q2 is connected to one end of the resistor R9 and the anode of the diode D2. The other end of the resistor R9 is connected to the cathode of the diode D2 and pin 27 of the main control chip U2. The source of the field-effect transistor Q2 is connected to pins 28 and 19 of the main control chip U2 and the source of the field-effect transistor Q1. The gate of the field-effect transistor Q1 is connected to one end of resistor R7 and the anode of diode D1. The other end of resistor R7 is connected to the cathode of diode D1 and pin 20 of the main control chip U2. The drain of the field-effect transistor Q1 is connected to one end of resistor R5, and the other end of resistor R5 can be connected to a rechargeable lithium-ion battery for charging. The charging circuit also includes capacitors C3, C5, and C6, resistor R11, and diode D3. One end of capacitor C3 is connected to one end of capacitor C5, one end of capacitor C6, one end of resistor R11, the cathode of diode D3, the other end of resistor R5, and the rechargeable lithium-ion battery. The other ends of capacitors C3, C5, C6, R11, and the anode of diode D3 are grounded. In this embodiment, the charging circuit is used to charge the lithium-ion battery according to the control instructions of the multi-battery pack synchronous charging main control circuit. Multiple charging circuits can charge the lithium-ion battery simultaneously. Each charging circuit has filtering, reverse current protection, overcurrent protection, and overvoltage protection functions.

[0024] As can be seen from the above, this utility model provides a control circuit capable of simultaneously charging multiple battery packs. By setting up a power supply, a main control circuit for simultaneous charging of multiple battery packs, and multiple charging circuits in the control circuit, the main control circuit can simultaneously control multiple charging circuits to charge the rechargeable lithium-ion batteries and control the LED display group to display the charging status of each lithium-ion battery pack. This enables simultaneous charging of multiple lithium-ion batteries and simultaneous display of the charging status of each lithium-ion battery pack. The charging control conforms to the charging characteristic curve of lithium-ion batteries and has multiple protections. The LED display group allows for intuitive observation of the charging status of lithium-ion batteries. This can improve the charging safety of lithium-ion batteries while ensuring charging efficiency, greatly improving the user experience and solving the problem of low charging efficiency and poor user experience caused by the inability to charge multiple lithium-ion batteries simultaneously in the prior art.

[0025] The specific embodiments described above are preferred embodiments of this utility model, and are not intended to limit the specific scope of this utility model. The scope of this utility model includes but is not limited to the specific embodiments described above. All equivalent changes made in accordance with this utility model are within the protection scope of this utility model.

Claims

1. A control circuit capable of synchronously charging a plurality of battery sets, characterized in that: The system includes a power supply, a main control circuit for simultaneous charging of multiple battery packs, and multiple charging circuits. The output of the power supply is connected to the main control circuit for simultaneous charging of multiple battery packs. The output of the main control circuit for simultaneous charging of multiple battery packs is connected to the input of each of the charging circuits. Each charging circuit has an input connected to a charging power supply. The output of each charging circuit can be connected to a rechargeable lithium-ion battery. The output of the main control circuit for simultaneous charging of multiple battery packs is also connected to an LED display group and a cooling fan assembly. The LED display group can display the charging status of each charging circuit. The main control circuit for simultaneous charging of multiple battery packs can simultaneously control the multiple charging circuits to charge the rechargeable lithium-ion batteries and control the LED display group to display the charging status of each lithium-ion battery.

2. The control circuit capable of synchronously charging multiple groups of batteries of claim 1, wherein: The main control circuit for synchronous charging of multiple battery packs includes a main control chip U2 and a capacitor C25. The main control chip U2 has 36 pins. Pin 33 of the main control chip U2 is connected to one end of the capacitor C25 and the output terminal of the power supply. Pins 27, 20, 28, and 19 of the main control chip U2 are respectively connected to the input terminals of multiple charging circuits. Pins 1 and 36 of the main control chip U2 are connected to the input terminal of the LED display group. Pin 3 of the main control chip U2 is connected to the input terminal of the cooling fan assembly. The other end of the capacitor C25 is grounded.

3. The control circuit capable of synchronously charging multiple groups of batteries of claim 2, wherein: The charging circuit includes a fuse resistor F1, an inductor L1, a resistor R6, a field-effect transistor Q2, a resistor R9, a diode D2, a resistor R7, a field-effect transistor Q1, a resistor R5, and a diode D1. One end of the fuse resistor F1 is connected to the charging power supply. The other end of the fuse resistor F1 is connected to one end of the inductor L1. The other end of the inductor L1 is connected to one end of the resistor R6. The other end of the resistor R6 is connected to the drain of the field-effect transistor Q2. The gate of the field-effect transistor Q2 is connected to one end of the resistor R9 and the anode of the diode D2. The other end of the resistor R9 is connected to... The negative terminal of diode D2 is connected to pin 27 of the main control chip U2. The source of field-effect transistor Q2 is connected to pin 28 and pin 19 of the main control chip U2, and the source of field-effect transistor Q1. The gate of field-effect transistor Q1 is connected to one end of resistor R7 and the positive terminal of diode D1. The other end of resistor R7 is connected to the negative terminal of diode D1 and pin 20 of the main control chip U2. The drain of field-effect transistor Q1 is connected to one end of resistor R5. The other end of resistor R5 can be connected to a rechargeable lithium-ion battery for charging.

4. The control circuit capable of synchronously charging multiple groups of batteries of claim 3, wherein: The charging circuit also includes capacitors C3, C5, and C6, resistor R11, and diode D3. One end of capacitor C3 is connected to one end of capacitor C5, one end of capacitor C6, one end of resistor R11, the negative terminal of diode D3, the other end of resistor R5, and a rechargeable lithium-ion battery. The other ends of capacitors C3, C5, C6, and R11, and the positive terminal of diode D3 are grounded.

5. The control circuit capable of synchronously charging multiple groups of batteries of claim 4, wherein: The main control chip U2 is model SC8808.

6. The control circuit capable of synchronously charging multiple groups of batteries of claim 5, wherein: The power supply is a 3.3V constant voltage power supply.

7. The control circuit capable of synchronously charging multiple groups of batteries of claim 6, wherein: The charging circuit consists of 4 groups.

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