Four-string lithium battery protection board

Abstract

The utility model provides a four-string lithium battery protection board, which belongs to the technical field of electronic circuits, and comprises a USB / Type-C module used for receiving an external power supply and providing 5V / 20W output; the charging and discharging main control module is connected with the USB / Type-C module and is used for controlling the charging and discharging process of the battery; the lithium battery protection module is connected with the charging and discharging main control module and is used for monitoring the voltage and current of the battery and providing overcharging, overdischarging and short-circuit protection; the display module is connected with the charging and discharging main control module and is used for displaying the battery state information; the illuminating lamp module is connected with the charging and discharging main control module and is used for controlling an illuminating lamp according to user operation; and the battery pack is connected with the lithium battery protection module and is used for storing and releasing electric energy. The protection board can monitor the state of the battery in real time and visually display the electric quantity percentage and the quick charge state to a user through the intelligent display module, so that the battery management is more efficient and visual.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electronic circuit, specifically relates to a four series lithium battery protection board. BACKGROUND

[0002] With the rapid development of electronic equipment, lithium batteries are widely used as the main power solution. However, lithium batteries may encounter overcharging, overdischarging, overcurrent and short circuit problems during use, which may damage the battery and even cause safety accidents. Therefore, the lithium battery protection board has become a key component to ensure the safe use of lithium batteries. Although the existing lithium battery protection board can provide basic protection function, there is still room for improvement in user experience, intelligent management and multifunctional integration.

[0003] In the prior art, there are still few products with complete functions such as battery intelligent charging / discharging function, charging indication, power indication, low power indication and power saving mode. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a four series lithium battery protection board. The utility model aims at providing a lithium battery protection board with battery intelligent charging / discharging function, charging indication, power indication, low power indication and power saving mode.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A four series lithium battery protection board comprises a USB / Type-C module for receiving external power supply and providing 5V / 20W output;

[0007] A charge / discharge main control module is connected with the USB / Type-C module and is used for controlling the charging and discharging process of the battery;

[0008] A lithium battery protection module is connected with the charge / discharge main control module and is used for monitoring the battery voltage and current and providing overcharge, overdischarge and short circuit protection;

[0009] A display module is connected with the charge / discharge main control module and is used for displaying the battery state information;

[0010] A lighting lamp module is connected with the charge / discharge main control module and is used for controlling the lighting lamp according to the user operation;

[0011] A battery pack is connected with the lithium battery protection module and is used for storing and releasing electric energy;

[0012] At least one USB output port is connected with the battery pack and is used for providing power supply to external equipment;

[0013] A Type-C output port is connected with the battery pack and is used for providing power supply to external equipment.

[0014] As a preferred scheme of the utility model, the charge-discharge master control module can control the charging current and voltage according to the input voltage and PD protocol.

[0015] As a preferred scheme of the utility model, the lithium battery protection module comprises a control IC, MOS tubes, resistors and capacitors and a fuse FUSE.

[0016] As a preferred scheme of the utility model, the display module can display the percentage of power and the fast charging state.

[0017] As a preferred scheme of the utility model, the first MOS switch circuit and the second MOS switch circuit are electrically connected, the MOS tube Q1 adopts a FCB070N65S3 large-current MOS tube, which has a withstand voltage of 650V and a maximum current of 44A.

[0018] As a preferred scheme of the utility model, the lighting lamp module has three working modes of long light, flashing light and SOS signal.

[0019] As a preferred scheme of the utility model, the lithium battery protection module can start overcharge protection when the battery voltage exceeds 4.25V±0.1V and start overdischarge protection when the battery voltage is lower than 2.700V±0.15V.

[0020] As a preferred scheme of the utility model, the USB / Type-C module supports positive and negative plug-in design.

[0021] As a preferred scheme of the utility model, the battery pack has a fully charged battery voltage of 16.65V±0.4V and a fully discharged battery voltage of 12.6V±0.5V.

[0022] Compared with the prior art, the utility model has the beneficial effects that:

[0023] The four-series lithium battery protection board of the utility model improves the safety and convenience of the use of lithium batteries by integrating multifunctional protection and intelligent display technology. The protection board can monitor the battery state in real time and intuitively display the percentage of power and the fast charging state to the user through the intelligent display module, so that the battery management is more efficient and intuitive. The integrated overcharge, overdischarge and short circuit protection functions greatly reduce the risk of battery damage and safety accidents, and the USB / Type-C module with positive and negative plug-in design and the PD protocol support provide better user experience and convenience. In addition, the diversified working modes of the lighting lamp module increase the practicability of the product, and the efficient charging control of the charge-discharge master control module improves the charging efficiency and the battery life. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings are used to provide further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation to the present application. In the drawings:

[0025] Figure 1 A module architecture diagram of the four-string lithium battery protection board of the present application;

[0026] Figure 2 A USB / Type-C module circuit diagram of the four-string lithium battery protection board of the present application (in the figure, USB3 represents Type-C);

[0027] Figure 3 A lithium protection module circuit diagram of the four-string lithium battery protection board of the present application;

[0028] Figure 4 A main control module circuit diagram of the four-string lithium battery protection board of the present application;

[0029] Figure 5 A lighting lamp module circuit diagram of the four-string lithium battery protection board of the present application;

[0030] Figure 6 A main control module circuit diagram of the four-string lithium battery protection board of the present application

[0031] Figure 7 A display module circuit diagram of the four-string lithium battery protection board of the present application. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] EMBODIMENT

[0034] Please refer to Figures 1-7 The present application provides the following technical solutions:

[0035] The four-string parallel lithium battery protection board system of the present embodiment mainly includes the following modules:

[0036] The USB / Type-C fast charging module supports 5V / 3A or 9V / 2.22A fast charging output, is compatible with the PD fast charging protocol, and the interface design can be used for forward and reverse insertion.

[0037] Charge-discharge control module: This module is based on high-performance MCU design, integrating charge management IC and discharge control logic, which can intelligently adjust the charging current and voltage according to the input voltage and PD protocol, while monitoring the battery status in real time.

[0038] Lithium battery protection module: This module contains high-precision control IC, MOS tube array, precision resistor capacitor network and fuse FUSE, which monitors the voltage and current of the battery pack in real time, providing multiple protections such as overcharge, overdischarge, overcurrent and short circuit.

[0039] Display module: This module uses a 0.96-inch OLED display screen to display key information such as battery percentage, fast charging status, protection status, etc.

[0040] Multifunctional lighting module: This module integrates high-brightness LED beads, supporting long-bright, flashing (fast / slow) and SOS distress signal three working modes.

[0041] Battery pack: The battery pack adopts a four-string parallel design, with a single battery capacity of 4000mAh and a total capacity of 16000mAh, featuring high energy density, long cycle life and excellent safety performance.

[0042] Multi-interface output module: This module contains a USB-A output port and a Type-C output port, supporting simultaneous power supply for two devices, meeting diverse charging needs.

[0043] More specifically, the working process of each module:

[0044] USB / Type-C module working process: Users charge the battery through the Type-C interface connected to the external power adapter. The USB / Type-C module receives the external power and negotiates the charging parameters according to the PD protocol, providing a maximum charging power of 20W.

[0045] During discharging, users can connect devices for charging through the same interface, and the module adjusts the output voltage and current according to the load demand.

[0046] Charge-discharge control module working process: The main control module monitors the charging status of the battery, controls the charging current and voltage, and prevents overcharging. At the same time, it also manages the discharging process to ensure that the battery works within a safe voltage range.

[0047] When the battery is fully charged, the main control module will reduce the charging current and enter the maintenance charging state to maintain the battery level.

[0048] Lithium battery protection module working process: The protection module monitors the voltage, current and temperature of the battery in real time, and immediately cuts off the MOSFET if it detects abnormal conditions (such as overcharge, overdischarge, short circuit), protecting the battery from damage.

[0049] Overcharge protection: when the battery voltage exceeds 4.25V, the protection module quickly cuts off the charging path.

[0050] Over-discharge protection: when the battery voltage is lower than 2.7V, the protection module cuts off the discharge path to prevent over-discharge of the battery.

[0051] Display module working process: the display module displays the current percentage of power and the charging status according to the data provided by the main control module. When the device is in fast charging mode, a fast charging logo is displayed. Users can intuitively understand the status of the battery, including the charging progress and the remaining power, through the display screen.

[0052] Light module working process: the user activates the light module by long-pressing the power key, and the module provides three modes: long light, flashing light, and SOS signal.

[0053] The light module is controlled by the main control module, and users can choose the appropriate lighting mode according to different use scenarios.

[0054] In specific applications, the working principle of the four-string lithium battery protection board is as follows:

[0055] Charging process: the external power supply is input through the USB / Type-C fast charging module, and the intelligent charge-discharge main control module intelligently adjusts the charging current and voltage according to the PD protocol and the battery status. When the battery is fully charged, it automatically switches to trickle charging mode to prevent overcharging.

[0056] Discharge process: the battery pack supplies power to external devices through the multi-interface output module. The intelligent charge-discharge main control module monitors the battery status in real time and automatically cuts off the discharge when the battery voltage is lower than the set value to prevent over-discharge.

[0057] Protection process: the high-precision lithium battery protection module monitors the voltage and current of the battery pack in real time, and when it detects abnormal conditions such as overcharge, over-discharge, over-current, or short circuit, it quickly cuts off the circuit to protect the battery from damage. At the same time, the intelligent display module displays the corresponding protection status information.

[0058] Lighting function: users can switch the working mode of the multifunctional light module through the key to meet the lighting needs in different scenarios.

[0059] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features. Any modification, equivalent substitution, improvement, etc. made within the spirit and principles of the present utility model shall be included within the scope of protection of the present utility model.

Claims

1. A four series lithium battery protection board, characterized in that, The application relates to a lithium battery charging and discharging device, which comprises the following parts: a USB / Type-C module for receiving external power supply and providing 5V / 20W output; a charging and discharging master module connected with the USB / Type-C module for controlling the charging and discharging process of the battery; a lithium battery protection module connected with the charging and discharging master module for monitoring the battery voltage and current and providing overcharge, overdischarge and short circuit protection; a display module connected with the charging and discharging master module for displaying the battery state information; an illuminating lamp module connected with the charging and discharging master module for controlling the illuminating lamp according to the user operation; a battery pack connected with the lithium battery protection module for storing and releasing electric energy; at least one USB output port connected with the battery pack for providing power supply to external equipment; a Type-C output port connected with the battery pack for providing power supply to external equipment.

2. The four series lithium battery protection board of claim 1, wherein, The charging and discharging master module can control the charging current and voltage according to the input voltage and PD protocol.

3. The four series lithium battery protection board of claim 1, wherein, The lithium battery protection module comprises a control IC, a MOS tube, resistors and capacitors and a fuse FUSE.

4. The four series lithium battery protection board of claim 1, wherein, The display module can display the electric quantity percentage and fast charging state.

5. The four series lithium battery protection board of claim 1, wherein, The illuminating lamp module has three working modes of long light, flashing light and SOS signal.

6. The four series lithium battery protection board of claim 1, wherein, The lithium battery protection module can start overcharge protection when the battery voltage exceeds 4.25V+ / -0.1V and start overdischarge protection when the battery voltage is lower than 2.700V+ / -0.15V.

7. The four series lithium battery protection board of claim 1, wherein, The USB / Type-C module supports positive and negative plug-in design.

8. The four series lithium battery protection board of claim 1, wherein, The battery pack has a fully charged battery voltage of 16.65V+ / -0.4V and a fully discharged battery voltage of 12.6V+ / -0.5V.

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