Intelligent lithium battery charger with Internet of Things communication function

Abstract

The utility model relates to an intelligent lithium battery charger with an Internet of Things communication function, which comprises a multifunctional shell, a connecting cable and a charging main control board, and a touch screen is arranged on the multifunctional shell; an LLC resonance circuit and a pulse activation bypass circuit of the charging main control board are connected to a DCDC conversion circuit, a power supply input end passes through a rectification filter circuit and then is connected with a charging output end through the DCDC conversion circuit and the pulse activation bypass circuit, an input end of the single-chip microcomputer control circuit is connected with a charged battery, and an output end of the single-chip microcomputer control circuit is connected with an output end of the charging main control board. The output end of the single-chip microcomputer control circuit is respectively connected with the DCDC conversion circuit and the pulse activation bypass circuit, and the touch screen and the wireless data transmission are connected with the single-chip microcomputer in series. The shell of the charger is designed to have intelligent digital display and touch control functions, and the mainboard of the charger has battery detection data remote transmission and alarm functions on the basis of having output anti-reverse connection and under-voltage pulse activation functions, and also has auxiliary functions of charging stopping, current-limiting protection, backflow prevention and the like when the battery is damaged.

Description

Technical Field

[0001] This utility model relates to the field of vehicle-to-grid device technology, specifically to an intelligent lithium battery charger with IoT communication function. Background Technology

[0002] Currently available portable chargers on the market generally suffer from highly homogenized casing designs and lack sufficient design and improvement for intelligent digital displays and touch controls. Furthermore, these chargers typically lack pulse activation charging functionality, usually charging directly upon power-on. This charging method, especially if the battery is reverse-connected, can easily damage both the battery and the charger, posing unnecessary risks and losses to users. Simultaneously, when lithium batteries are left unused for an extended period and enter undervoltage protection mode, direct power from the charger cannot activate the battery, thus failing to charge it. This not only limits the usage scenarios of lithium batteries but also inconveniences users and reduces the user experience. Additionally, for damaged batteries, prolonged use can lead to bulging, deformation, or even fire and explosion. Therefore, existing portable chargers and power adapters on the market have significant deficiencies in safety and functionality and urgently need improvement. Utility Model Content

[0003] The technical problem this utility model aims to solve is to overcome the shortcomings of existing chargers in terms of shell structure design, motherboard safety, and functionality, and to provide an intelligent lithium battery charger with IoT communication capabilities. This charger is safe, reliable, durable, and has a low failure rate. Its shell is designed with intelligent digital display and touch control functions. In addition to output reverse connection protection and undervoltage pulse activation functions, its motherboard also has remote transmission of battery detection data and alarm functions. It also has auxiliary functions such as battery damage stop charging, current limiting protection, and reverse flow prevention. This solves the problems of existing chargers being unable to activate deeply discharged batteries, and the battery swelling or even fire and explosion caused by prolonged high-current charging of damaged batteries.

[0004] This intelligent lithium battery charger with IoT communication capabilities includes a multi-functional housing, connecting cables, and a charging main control board. The charging main control board is installed and fixed inside the multi-functional housing. Two connecting cables are threaded and fixed at both ends of the multi-functional housing and extend into the housing to connect with the charging main control board. The multi-functional housing is equipped with a touch screen. The charging main control board integrates a rectifier and filter circuit, a DC-DC converter circuit, an LLC resonant circuit, a pulse activation bypass circuit, a microcontroller control circuit, and a wireless data transmission module. The LLC resonant circuit and the pulse activation bypass circuit are connected to the DC-DC converter circuit. The power input terminal, after passing through the rectifier and filter circuit, is connected to the charging output terminal via the DC-DC converter circuit and the pulse activation bypass circuit, respectively. The input terminal of the microcontroller control circuit is connected to the battery being charged, and the output terminal is connected to the DC-DC converter circuit and the pulse activation bypass circuit, respectively. The touch screen and the wireless data transmission module are serially connected to the microcontroller control circuit.

[0005] The optimized pulse activation bypass circuit is equipped with a P-channel MOSFET for controlling pulse output, a current-limiting PTC, and an anti-backflow diode.

[0006] Furthermore, the output terminal of the microcontroller control circuit is connected to a P-channel MOS transistor.

[0007] Furthermore, the connecting cables are integrally fixed on both sides of the multi-functional housing, and the outer ends of the two connecting cables are respectively provided with plugs for connecting AC power and for connecting the load charging port; the inner ends of the two connecting cables extend into the multi-functional housing and are respectively connected to the power input terminal and the charging output terminal integrated on the charging main control board.

[0008] This utility model discloses an intelligent lithium battery charger with IoT communication capabilities, overcoming the shortcomings of existing chargers in terms of shell structure design, motherboard safety, and functionality. Its shell is designed with intelligent digital display and touch control functions. In addition to output reverse connection protection and undervoltage pulse activation functions, its motherboard also has the functions of remote transmission of battery detection data and alarm. At the same time, it has auxiliary functions such as battery damage stop charging, current limiting protection, and reverse flow prevention. It solves the problems of existing chargers being unable to activate deeply discharged batteries, and the problem of batteries swelling or even catching fire and exploding due to prolonged high-current charging of damaged batteries. Attached Figure Description

[0009] The following description, in conjunction with the accompanying drawings, further illustrates the present invention: a smart lithium battery charger with IoT communication capabilities.

[0010] Figure 1 This is a schematic diagram of the front view of an intelligent lithium battery charger with IoT communication capabilities;

[0011] Figure 2 yes Figure 1 A top-view planar structural diagram;

[0012] Figure 3 This is a wireframe diagram illustrating the logic structure and connection principle of the main control board of this intelligent lithium battery charger with IoT communication capabilities.

[0013] Figure 4 This is a diagram of the rectifier and filter circuit, DC-DC conversion circuit, and pulse activation bypass circuit of the main control board of this intelligent lithium battery charger with IoT communication function.

[0014] Figure 5 This is an LLC resonant circuit diagram of the main control board of this intelligent lithium battery charger with IoT communication function;

[0015] Figure 6 This is a microcontroller control circuit diagram of the main control board of this intelligent lithium battery charger with IoT communication function.

[0016] In the picture:

[0017] 1- Multifunctional housing; 11- Touchscreen;

[0018] 2- Connecting cables;

[0019] 3-Charging main control board; 31-Rectifier and filter circuit; 32-DC-DC conversion circuit; 33-LLC resonant circuit; 34-Pulse activation bypass circuit; 35-Microcontroller control circuit; 36-Wireless data transmission module. Detailed Implementation

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0021] In the description of this utility model, it should be understood that the terms "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] The present invention will be further described below with specific embodiments, but the scope of protection of the present invention is not limited to the following embodiments.

[0023] Implementation method 1: such as Figures 1 to 6 As shown, this intelligent lithium battery charger with IoT communication function includes a multi-functional housing 1, connecting cables 2, and a charging main control board 3. The charging main control board 3 is installed and fixed inside the multi-functional housing 1. The two connecting cables 2 are threaded and fixed at both ends of the multi-functional housing 1 and extend into the multi-functional housing 1 to connect with the charging main control board 3. The multi-functional housing 1 is equipped with a touch screen 11. The charging main control board 3 integrates a rectifier filter circuit 31, a DC-DC converter circuit 32, an LLC resonant circuit 33, a pulse activation bypass circuit 34, and a microcontroller control circuit. The touch screen 11 and the wireless data transmission module 36 are connected in series with the DC-DC converter circuit 32. The LLC resonant circuit 33 and the pulse activation bypass circuit 34 are connected to the DC-DC converter circuit 32. The power supply input is rectified and filtered by the DC-DC converter circuit 31 and then connected to the charging output via the DC-DC converter circuit 32 and the pulse activation bypass circuit 34. The input of the microcontroller control circuit 35 is connected to the battery being charged, and the output of the microcontroller control circuit 35 is connected to the DC-DC converter circuit 32 and the pulse activation bypass circuit 34. The touch screen 11 and the wireless data transmission module 36 are connected to the microcontroller control circuit 35 in series. During operation: The microcontroller control circuit first detects whether the battery is reverse-connected. If the battery is reverse-connected, the pulse-activated bypass circuit controlled by the microcontroller control circuit does not work. If the battery is not reverse-connected, the microcontroller control circuit controls the pulse-activated bypass circuit to send a small current pulse charge. If the battery is in undervoltage protection state, after the charger stops sending the pulse voltage, the battery voltage rises due to the pulse charging. When the microcontroller control circuit detects that the battery has a certain voltage, it starts the main circuit to charge the battery in pre-charge mode. At this time, the low voltage current is generally 0.3*Imax, which is convenient for battery repair. At the same time, the pre-charge has a time limit to prevent faulty batteries from bulging and deforming due to prolonged charging. After charging to a certain voltage, it charges with constant current Imax, then charges with constant voltage after charging to a certain voltage, and finally trickle charging. When the voltage and current meet the conditions, the green light turns on to indicate that the battery is fully charged. The microcontroller control circuit presets the time for each stage and the total time to prevent faulty batteries from charging for a long time. During the charging process, the microcontroller circuit reads data such as battery detection status and charger charging status from the physical and wireless terminals through the touch screen and wireless data transmission module.

[0024] Implementation method 2: such as Figures 4 to 6As shown, this intelligent lithium battery charger with IoT communication function includes a P-channel MOSFET, a current-limiting PTC, and an anti-reverse-current diode on the pulse activation bypass circuit 34 for controlling pulse output. The pulse activation bypass circuit uses a P-channel MOSFET, controlled by the output signal of the microcontroller control circuit. Since the P-channel MOSFET can conduct at low voltage, it can be well controlled without an external power supply. The PTC is connected in series in the pulse activation bypass circuit to limit the pulse current and prevent damage to the battery. The diode is included in the pulse activation bypass circuit to prevent reverse current from the battery from damaging the charger body. The output terminal of the microcontroller control circuit 35 is connected to the P-channel MOSFET. It is used to receive the output signal of the microcontroller control circuit and execute the output of the pulse activation bypass circuit. The remaining structures and components are as described in Embodiment 1 and will not be repeated.

[0025] Implementation method 3: such as Figure 1 , 2 As shown, the connecting cables 2 of this intelligent lithium battery charger with IoT communication function are integrally fixed to both sides of the multi-functional housing 1. The outer ends of the two connecting cables 2 are respectively provided with plugs for connecting to AC power and for connecting to the load charging port; the inner ends of the two connecting cables 2 extend into the multi-functional housing 1 and are respectively connected to the power input terminal and charging output terminal integrated on the charging main control board 3. The housing is designed as a fully enclosed sealed structure surrounded by an alloy housing and end caps, which gives it explosion-proof and flame-retardant functions. A large number of heat dissipation fins are designed on the alloy housing, so that the internal heat can be quickly diffused outward and carried away by the ambient air, providing a good, reasonable and safe heat dissipation effect. The remaining structures and components are as described in Embodiment 1 and will not be described again.

[0026] This intelligent lithium battery charger with IoT communication capabilities overcomes the shortcomings of existing chargers in terms of casing structure design, motherboard safety, and functionality. Its casing features an intelligent digital display and touch control. In addition to reverse connection protection and undervoltage pulse activation, its motherboard also provides remote transmission of battery detection data and alarm functions. Furthermore, it includes auxiliary functions such as battery damage-related charge stop, current limiting protection, and reverse flow prevention. This solves the problems of existing chargers being unable to activate deeply discharged batteries and the issues of prolonged high-current charging of damaged batteries causing bulging or even fire and explosion. The specific parameters of this charger are: input voltage: 176VAC-264VAC; output power: 600W; voltage range: 24Vdc-88Vdc; current: maximum 10A. It is widely applicable to several charging stages, including activation, pre-charging, constant current, and constant voltage, for lithium battery packs (ternary lithium batteries, lithium iron phosphate batteries, lithium titanate batteries, etc.) in electric two-wheelers, electric tricycles, electric cars, sightseeing vehicles, police vehicles, forklifts, communications, power, and marine applications.

[0027] The above description illustrates the main features, basic principles, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments or examples described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments or examples should be considered exemplary and not restrictive. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A smart lithium battery charger with IoT communication capabilities, characterized in that: The device includes a multi-functional housing (1), connecting cables (2), and a charging main control board (3). The charging main control board (3) is installed and fixed inside the multi-functional housing (1). Two connecting cables (2) are threaded and fixed at both ends of the multi-functional housing (1) and extend into the multi-functional housing (1) to connect with the charging main control board (3). The multi-functional housing (1) is equipped with a touch screen (11); the charging main control board (3) integrates a rectifier filter circuit (31), a DC-DC converter circuit (32), an LLC resonant circuit (33), a pulse activation bypass circuit (34), a microcontroller control circuit (35), and a wireless data transmission module (36). The LLC resonant circuit (33) and the pulse activation bypass circuit (34) are connected to the DC-DC converter circuit (32). The power supply input terminal is connected to the charging output terminal through the rectifier filter circuit (31), the DC-DC converter circuit (32), and the pulse activation bypass circuit (34), respectively. The input terminal of the microcontroller control circuit (35) is connected to the battery being charged. The output terminal of the microcontroller control circuit (35) is connected to the DC-DC converter circuit (32) and the pulse activation bypass circuit (34), respectively. The touch screen (11) and the wireless data transmission module (36) are connected in series with the microcontroller control circuit (35).

2. The intelligent lithium battery charger with IoT communication function according to claim 1, characterized in that: The pulse activation bypass circuit (34) is equipped with a P-channel MOS transistor for controlling pulse output, a current-limiting PTC, and an anti-backflow diode.

3. The intelligent lithium battery charger with IoT communication function according to claim 2, characterized in that: The output terminal of the microcontroller control circuit (35) is connected to the P-channel MOS transistor.

4. The intelligent lithium battery charger with IoT communication function according to claim 3, characterized in that: The connecting cables (2) are fixed integrally on both sides of the multi-functional housing (1). The outer ends of the two connecting cables (2) are respectively provided with plugs for connecting AC power and for connecting the load charging port. The inner ends of the two connecting cables (2) extend into the multi-functional housing (1) and are respectively connected to the power input terminal and the charging output terminal integrated on the charging main control board (3).

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