CN219960157U

CN219960157U - Charging chip and charging equipment

Info

Publication number: CN219960157U
Application number: CN202320924437.9U
Authority: CN
Inventors: 谢大盛; 黄启东; 苏煜洪
Original assignee: Shenzhen Lichuang Microelectronics Co ltd
Current assignee: Shenzhen Lichuang Microelectronics Co ltd
Priority date: 2023-04-20
Filing date: 2023-04-20
Publication date: 2023-11-03
Anticipated expiration: 2033-04-20

Abstract

The utility model discloses a charging chip and charging equipment. The charging chip comprises a substrate and an internal circuit in the substrate; the internal circuit includes: the device comprises a control processing circuit, a reset circuit, an oscillating circuit, a reference circuit, an anode and cathode charging input/output circuit and an anode and cathode identification circuit; the control processing circuit is used for carrying out integrated control on the internal circuit; the positive and negative electrode identification circuit is respectively and electrically connected with the control processing circuit and the positive and negative electrode charging input/output circuit and is used for identifying the polarity of the rechargeable battery and outputting an identification signal to the control processing circuit; the positive and negative charging input/output circuit is respectively and electrically connected with the positive and negative identification circuit and the control processing circuit, and is used for inputting charging current for the rechargeable battery. The utility model realizes the effect of identifying the polarity of the rechargeable battery and safely charging the rechargeable battery by connecting the rechargeable battery to the positive and negative charging input/output circuit and identifying the polarity of the rechargeable battery by the positive and negative identifying circuit.

Description

Charging chip and charging equipment

Technical Field

The present utility model relates to the field of charging technologies, and in particular, to a charging chip and a charging device.

Background

The mobile small household appliances in the modern society are more and more diversified, and a lot of mobile small household appliances are powered by lithium batteries, so that the requirement of charging by single lithium batteries is also more and more increased.

Some existing devices for charging lithium batteries, such as the following patent numbers: the lithium battery charger disclosed in CN201720665068.0 is convenient to place, the polarity of the battery cannot be identified, a user needs to judge the positive electrode and the negative electrode of the battery when placing the battery, the battery needs to be placed in the correct direction, and certain electronic knowledge is needed in use.

There is therefore a need for improvement and advancement in the art.

Disclosure of Invention

The technical problems to be solved by the utility model are as follows: a charging chip and a charging device are provided to solve the problem that the existing lithium battery charging device cannot identify the polarity of a battery.

The utility model is realized by the following technical scheme: a charging chip comprising a substrate and an internal circuit within the substrate;

the internal circuit includes: the device comprises a control processing circuit, a reset circuit, an oscillating circuit, a reference circuit, an anode and cathode charging input/output circuit and an anode and cathode identification circuit;

the control processing circuit is used for carrying out integrated control on the internal circuit;

the reset circuit is electrically connected with the control processing circuit and is used for providing a power-on reset signal for the internal circuit;

the oscillating circuit is electrically connected with the control processing circuit and is used for providing a reference clock for the internal circuit;

the reference circuit is electrically connected with the control processing circuit and is used for providing a reference current source for the internal circuit;

the positive and negative electrode identification circuit is respectively and electrically connected with the control processing circuit and the positive and negative electrode charging input/output circuit and is used for identifying the polarity of the rechargeable battery and outputting an identification signal to the control processing circuit;

the positive and negative charging input/output circuit is respectively and electrically connected with the positive and negative identification circuit and the control processing circuit and is used for accessing the rechargeable battery and inputting charging current for the rechargeable battery.

Further arrangement of the utility model, the internal circuit further comprises: a charging current control circuit;

the charging current control circuit is electrically connected with the control processing circuit and is used for adjusting the current value of the input charging battery current.

Further arrangement of the utility model, the internal circuit further comprises: an abnormality detection circuit;

the abnormality detection circuit is electrically connected with the anode and cathode charging input/output circuit and the control processing circuit respectively, and is used for detecting the voltage value of the input rechargeable battery voltage and outputting a detection signal to the control processing circuit.

Further arrangement of the utility model, the internal circuit further comprises: a charge indication circuit;

the charging indication circuit is electrically connected with the control processing circuit and used for indicating the charging state of the rechargeable battery.

The utility model further provides that the substrate comprises: the battery charging device comprises a power supply pin, a grounding pin, a first battery charging pin, a second battery charging pin, a first charging indication pin and a second charging indication pin;

the power supply pin, the grounding pin, the first battery charging pin, the second battery charging pin, the first charging indication pin and the second charging indication pin are respectively arranged on the base body and are electrically connected with the internal circuit.

Based on the same inventive concept, the present utility model also provides a charging apparatus comprising: the USB interface, the magnetic charging interface and the charging chip;

the USB interface is electrically connected with the charging chip through a circuit board;

the magnetic type charging interface is connected to the circuit board through a charging wire and is electrically connected with the charging chip, and is used for being connected to two ends of the rechargeable battery to magnetically attract the rechargeable battery to be charged.

According to the utility model, the end part of the magnetic charging interface is provided with a magnetic part consisting of a magnet and a metal sheet.

The utility model further provides that the method further comprises the following steps: an indication module;

the indication module is electrically connected with the charging chip.

In a further arrangement of the utility model, the charging wire is a flexible charging wire that is bendable.

According to a further arrangement of the utility model, the indication module comprises: the LED lamp comprises a first LED lamp and a second LED lamp, wherein the first LED lamp is electrically connected with the second LED lamp.

The utility model has the beneficial effects that:

the charging chip of the present utility model includes: comprises a substrate and an internal circuit within the substrate; the internal circuit includes: the device comprises a control processing circuit, a reset circuit, an oscillating circuit, a reference circuit, an anode and cathode charging input/output circuit and an anode and cathode identification circuit;

the utility model achieves the effect of identifying the polarity of the rechargeable battery by connecting the rechargeable battery to the positive and negative charging input/output circuit and identifying the polarity of the rechargeable battery by the positive and negative identifying circuit.

Drawings

Fig. 1 is a schematic structural diagram of a charging device according to a preferred embodiment of the present utility model.

Fig. 2 is a schematic structural view of the magnetic attraction portion in fig. 1.

Fig. 3 is a schematic diagram of an external structure of the charging chip in fig. 1.

Fig. 4 is a schematic structural diagram of the charging chip in fig. 1.

Fig. 5 is a schematic diagram of the circuit structure in fig. 1.

Fig. 6 is a schematic diagram of the positive and negative electrode identification circuit and the charging current control circuit in fig. 1.

Description of the main reference signs

100. A charging chip; 10. a base; 20. an internal circuit; 21. a control processing circuit; 22. a reset circuit; 23. an oscillating circuit; 24. a reference circuit; 25. a positive and negative electrode identification circuit; 26. positive and negative charging input/output circuit; 27. an abnormality detection circuit; 28. a charging current control circuit; 29. a charge indication circuit; 200. a USB interface; 300. a magnetic charging interface; 310. a housing; 320. a magnetic attraction part; 321. a magnet; 322. a metal sheet; 400. an indication module; l1, a first LED lamp; l2, a second LED lamp; 500. a circuit board; 600. a charging wire; 700. a rechargeable battery; VDD, power supply pin; GND, ground pin; VTN, first battery charge pin; VTP, second battery charge pin; CHANGE, the first charge indicates the pin; STDBY, second charge indication pin; c1, a first capacitor; c2, a second capacitor; c3, a third capacitor; q1, a first MOS tube; q2, a second MOS tube; q3, a third MOS tube; q4, a fourth MOS tube; r1, a first resistor; r2, a second resistor; r3, a third resistor; r4, a fourth resistor; U1A, an inverter; u2, a second chip; u3, a third chip; u4, a fourth chip; U5A, a fifth operational amplifier; U6A, sixth operational amplifier.

Detailed Description

The utility model provides a charging chip and charging equipment, which are suitable for the technical field of charging, and the utility model is further described in detail below by referring to the accompanying drawings and examples in order to make the purposes, the technical scheme and the effects of the utility model clearer and more definite. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description and claims, unless the context clearly dictates otherwise, the terms "a" and "an" and "the" may refer to either a single or a plurality.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The existing lithium battery charging equipment generally adopts a special PVC mold to manufacture a groove suitable for the size of a battery, and adds corresponding structures such as a spring, a shrapnel and the like to manufacture a charging structure convenient for the pulling and the inserting of the battery.

Although the conventional charging method can realize battery charging, the following disadvantages are found in practical use: 1, special dies are needed, and batteries are different in size and not easy to consider; 2, the battery needs to be placed in the correct direction, and a certain electronic knowledge is needed in use. Accordingly, the present utility model improves upon existing lithium battery charging devices in accordance with the above-described technical problems.

Examples

The preferred embodiment of the utility model provides charging equipment which can be connected with a lithium battery to charge the lithium battery. As shown in fig. 1, the charging apparatus includes: the charging device comprises a charging chip 100, a USB interface 200, a magnetic charging interface 300 and an indication module 400.

The USB interface 200 is electrically connected to the charging chip 100 through the circuit board 500, that is, the USB interface 200 and the charging chip 100 are connected to the circuit board 500, so that the circuit board 500 and the charging chip 100 can be electrically connected. The charging device may be connected to an electronic device or a charging head through the USB interface 200 to charge the rechargeable battery 700. In other embodiments, the charging chip 100 may also obtain power through other ways to charge the rechargeable battery 700.

The magnetic charging interface 300 has a charging end, and can be connected to the positive and negative electrodes of the rechargeable battery 700 respectively, the magnetic charging interface 300 is configured such that the charging device adopts a magnetic charging mode when charging the battery, and the magnetic charging interface 300 is connected to the circuit board 500 through the charging wire 600 and electrically connected to the charging chip 100, and is used to connect to two ends of the rechargeable battery 700 to magnetically charge the rechargeable battery 700. The end part of the charging interface is charged by the magnetic attraction type charging mode, and the charging wire 600 is connected into the two ends of the rechargeable battery 700 for charging, so that the charging structure is different from a charging structure of a traditional PVC mould battery in a pulling-out and inserting way: and limiting the charging mode of the battery by using the grooves. When the magnetic charging mode is used, the limitation of the size of the die is not needed, and batteries with different sizes can be matched. In addition, the charging wire 600 is a flexible charging wire that can be bent, and by bending the charging wire 600, batteries of different sizes can be adapted; and the length of the charging wire 600 can be adjusted, that is, the effect of adapting to batteries of different sizes can be further achieved by adjusting the length of the charging wire 600.

The indication module 400 is electrically connected to the charging chip 100, and is used for indicating the charging status of the rechargeable battery 700. Specifically, the indication module 400 may be configured as an LED indication lamp or an alarm bell, and in this preferred embodiment, the indication module 400 is described as having a first LED lamp L1 and a second LED lamp L2, where the first LED lamp L1 and the second LED lamp L2 are electrically connected.

In a further implementation of an embodiment, please refer to fig. 1 and 2 in combination. A magnetic part 320 composed of a magnet 321 and a metal piece 322 is provided at an end of one of the magnetic charging interfaces 300. The casing 310 wraps the outside of the magnetic part 320, protects the magnetic part 320, and insulates the surface of the magnetic part 320 that is not charged. The magnet 321 and the metal sheet 322 in the magnetic attraction portion 320 cooperate to perform a magnetic attraction function, and the metal sheet 322 may improve the conductivity of the magnet 321. Also, the magnets 321 and the metal pieces 322 may have a circular shape to fit a currently general cylindrical battery, and in particular, the metal pieces 322 may be provided as a metal disc or a metal ring, etc. The magnet 321 and the metal piece 322 may have any other shape such as a rectangular shape or a fan shape. The metal plate 322 may be a metal plate 322 made of iron, nickel, cobalt, or the like. The magnetic charging interface 300 uses two ferromagnetic metal discs as two poles of charging, and two wires are added to draw charging current from the charging chip 100, so that charging of multiple types of batteries can be realized quickly and conveniently.

Referring to fig. 3 and 4, the charging chip 100 is described below.

With continued reference to fig. 3, in a preferred embodiment of the charging device of the present utility model, the charging chip 100 has an overall control function on the charging device, and the charging chip 100 includes a base 10 and an internal circuit 20 in the base 10. The internal circuit 20 includes: the control processing circuit 21, the reset circuit 22, the oscillation circuit 23, the reference circuit 24, the positive-negative electrode identification circuit 25, the positive-negative electrode charge input-output circuit 26, the abnormality detection circuit 27, the charge current control circuit 28, and the charge instruction circuit 29.

The control processing circuit 21 functions as a central processor, and the control processing circuit 21 may include an external circuit including a 3582 charging chip and a chip, for performing integrated control on the internal circuit 20, that is, performing integrated control processing on each circuit portion of the internal circuit 20. The reset circuit 22 is electrically connected to the control processing circuit 21, and is configured to provide a power-on reset signal for the internal circuit 20, and when the charging chip 100 is powered on, the charging chip 100 performs reset initialization to clear the previous state; the oscillation circuit 23 is electrically connected to the control processing circuit 21, and is configured to provide a reference clock for the internal circuit 20; the reference circuit 24 is electrically connected to the control processing circuit 21, and is configured to provide a reference current source for the internal circuit 20; the positive and negative electrode identification circuit 25 is electrically connected with the control processing circuit 21 and the positive and negative electrode charging input output circuit, respectively, and is used for identifying the polarity of the rechargeable battery 700 and outputting an identification signal to the control processing circuit 21; the positive and negative charging input/output circuit 26 is electrically connected with the control processing circuit 21 of the positive and negative identification circuit 25, respectively, and is used for accessing the rechargeable battery 700 and inputting charging current to the rechargeable battery 700; the charging current control circuit 28 is electrically connected to the control processing circuit 21, and is used for adjusting the current value of the current input into the rechargeable battery 700; the abnormality detection circuit 27 is electrically connected to the positive and negative electrode charge input/output circuit 26 and the control processing circuit 21, respectively, and is configured to detect a voltage value of the voltage input to the rechargeable battery 700 and output a detection signal to the control processing circuit 21.

Specifically, for explaining the main charging principle of the preferred embodiment of the present utility model, please refer to fig. 6, for the positive and negative electrode identification circuit 25 and the charging current control circuit 28. The main charging principle of the utility model is as follows: the output ends of the first battery charging pin VTN and the second battery charging pin VTP are respectively connected with a fourth MOS tube Q4 (NMOS), a third MOS tube Q3 (PMOS), a second MOS tube Q2 (NMOS) and a first MOS tube Q1 (PMOS), so that an H-bridge circuit is formed, the height of the output of the first battery charging pin VTN and the output of the second battery charging pin VTP can be switched by controlling the H-bridge circuit, and the rechargeable battery 700 can be charged regardless of the positive electrode access or the negative electrode access. The resistors (first resistor R1, second resistor R2, third resistor R3, and fourth resistor R4) between the input terminals of the first battery charging pin VTN and the second battery charging pin VTP are connected in series to form a voltage selection network. And the different levels are selected through the transmission gates of the second chip U2 and the third chip U3, and compared with VREF (reference voltage) by the sixth operational amplifier U6A, to finally generate the signal level VSIN of battery charging.

In addition, the voltage difference is compared between the first battery charging pin VTN and the second battery charging pin VTP through the fifth operational amplifier U5A, so that the positive and negative electrode access condition of the rechargeable battery 700 can be identified, and the related control signals (CTL and ctl_n, whose signal levels are opposite, can be implemented through the inverter U1A).

For example, the second battery charging pin VTP is connected to the positive electrode of the rechargeable battery 700, the first battery charging pin VTN is connected to the negative electrode of the rechargeable battery 700, the fifth operational amplifier U5A can identify the polarity of the rechargeable battery 700 according to the voltages of the VTP and the VTN, and then generate a CTL signal, the CTL signal connects the VSIN signal with the gate of the fourth MOS transistor Q4 through the transmission gate, and the fourth MOS transistor Q4 is controlled to be turned on by the VSIN, and the current level can be controlled. The CTL signal controls the first MOS transistor Q1 to be turned on to ground, so that a charging current loop is formed as follows: the +5v power flows out from the second battery charging pin VTP to the positive electrode of the rechargeable battery 700, then to the negative electrode of the rechargeable battery 700, and back to the first battery charging pin VTN through the drain of the fourth MOS transistor Q4, and flows in from the drain of the first MOS transistor Q1 to the source of the first MOS transistor Q1 to the ground. The VSIN signal is generated by comparing a resistor string between the first battery charging pin VTN and the second battery charging pin VTP with a reference voltage, and generates a related charging control signal including trickle, constant current and final constant voltage processes in case of short circuit or abnormality.

Based on the above-mentioned internal part composed of each circuit, in the preferred embodiment, the charging chip 100 has functions of automatic positive and negative electrode identification, charging current control, abnormal charging identification, etc.

Specifically, referring to fig. 3, in actual use, the rechargeable battery 700 is connected to the positive and negative charging input/output circuit 26 to perform charging input/output, the positive and negative identifying circuit 25 identifies the polarity of the connected rechargeable battery 700, determines whether the connected rechargeable battery 700 is in the positive or negative state, and outputs an identifying signal with polarity information of the rechargeable battery 700 to the control processing circuit 21. When the control processing circuit 21 receives the polarity information of the positive-connection signal of the charging point battery, the control processing circuit 21 controls the positive-negative charging input-output circuit 26 to continue normal charging; when the control processing circuit 21 receives the polarity information of the positive signal of the rechargeable battery 700, the control processing circuit 21 controls the positive and negative charging input/output circuit 26 to charge the rechargeable battery 700 in reverse. This achieves the automatic identification of the battery polarity of the rechargeable battery 700 and the charging according to the polarity of the rechargeable battery 700.

In a further implementation of an embodiment, referring to fig. 3 and 4 in combination, the substrate 10 includes: a power supply pin VDD, a ground pin GND, a first battery charge pin VTN, a second battery charge pin VTP, a first charge indication pin CHANGE, and a second charge indication pin STDBY; the power supply pin VDD, the ground pin GND, the first battery charging pin VTN, the second battery charging pin VTP, the first charging indication pin CHANGE and the second charging indication pin STDBY are respectively disposed on the substrate 10 and electrically connected to the internal circuit 20.

Specifically, the power supply pin VDD is connected to the positive electrode of an external power supply, and the ground pin GND is grounded; a first battery charging pin VTN is connected to one end of the positive and negative electrode charging input output circuit 26, and a second battery charging pin VTP is connected to the other end of the positive and negative electrode charging input output circuit 26; the first battery charging pin VTN is connected to one end of the charge indication circuit 29, and the second battery charging pin VTP is connected to the other end of the charge indication circuit 29.

Referring to fig. 5, in a preferred embodiment of the charging device of the present utility model, the charging device forms a charging loop as shown. Two ends of the rechargeable battery 700 are respectively connected to the first battery charging pin VTN and the second battery charging pin VTP; one end of the third capacitor C3 is connected with the first battery charging pin VTN, and the other end of the third capacitor C3 is grounded; one end of the second capacitor C2 is connected to the second battery charging pin VTP, and the other end of the second capacitor C2 is grounded; one end of the first LED lamp L1 is connected with the first charging indication pin CHANGE, and the other end of the first LED lamp L1 is grounded; one end of the second LED lamp L2 is connected with the second charging indication pin STDBY, and the other end of the second LED lamp L2 is grounded; one end of the first capacitor C1 is connected to the power pin VDD, and the other end of the first capacitor C1 is grounded.

With continued reference to fig. 5, in a preferred embodiment of the charging device of the present utility model, the charging current control and the charging abnormality recognition function are performed for the charging device. Specifically, an external power supply of usually 5V is taken as an example. After the charging chip 100 obtains power through the USB interface 200, the reset circuit 22 resets the whole circuit of the internal circuit 20, and at this time, the charging indication circuit 29 controls the first LED lamp L1 to be turned off and the second LED lamp L2 to be turned on; when the magnetic charging interface 300 is connected to the rechargeable battery 700, the positive and negative electrode identification circuit 25 identifies the polarity of the rechargeable battery 700, then the abnormality detection circuit 27 detects the voltage value of the voltage input to the rechargeable battery 700, if the voltage at both ends of the output rechargeable battery 700 is lower than 1.5V (typical value), the abnormality detection circuit 27 outputs an abnormality signal to the control processing circuit 21, and after the control processing circuit 21 receives the abnormality signal, the control processing circuit 21 controls the charge indication circuit 29 to control the first LED lamp L1 to be turned on and the second LED lamp L2 to be turned off. When the control processing circuit 21 receives the abnormal signal, although the positive and negative charging currents are given according to the polarity of the rechargeable battery 700, the current is extremely small (about 3% of the normal charging), so that the current is used as a wake-up operation when the lithium battery is completely dead, and the situation that other non-rechargeable batteries 700 are wrongly connected and the danger is caused by the high-current charging is avoided, so that the charging indicating circuit 29 is required to give an indication to the user to avoid other accidents.

When the abnormality detection circuit 27 detects that the voltage value of the voltage input to the two ends of the rechargeable battery 700 is higher than 1.5V and lower than 3.0V, the abnormality detection circuit 27 detects that the trickle charge signal is output to the control processing circuit 21, and after receiving the trickle charge signal, the control processing circuit 21 controls the charging current control circuit 28 to output positive and negative trickles (about 10% of normal charging) to trickle charge the rechargeable battery 700, so that the rechargeable battery 700 is fully protected by charging, and at this time, the control processing circuit 21 controls the charging indication circuit 29 to control the first LED lamp L1 to be turned on and the second LED lamp L2 to be turned on.

When the abnormality detection circuit 27 detects that the voltage value of the voltage input to the two ends of the rechargeable battery 700 is higher than 3V and is not full, the rechargeable battery 700 enters a constant-current constant-voltage charging mode, the abnormality detection circuit 27 detects that a constant-current charging signal is output to the control processing circuit 21, after receiving the constant-current charging signal, the control processing circuit 21 controls the charging current control circuit 28 to charge the battery with a high-efficiency constant current until the charging is nearly full and is converted into a constant-voltage mode, and finally cuts off the charging current after full charging, at this time, the control processing circuit 21 controls the charging indicating circuit 29 to control the first LED lamp L1 to be turned off and the second LED lamp L2 to be turned on.

In summary, the charging chip and the charging device provided by the utility model have the following beneficial effects:

according to the charging equipment provided by the utility model, the polarity of the accessed rechargeable battery is identified by arranging the positive and negative electrode identification circuit in the charging chip, so that the effect of identifying the polarity of the battery is achieved, and the positive connection or the reverse connection of the battery is not required to be distinguished;

according to the charging equipment provided by the utility model, the charging current control circuit is arranged in the charging chip, so that the current value of the current input into the rechargeable battery can be controlled to achieve different charging modes.

According to the charging equipment provided by the utility model, the charging state of the rechargeable battery can be detected by arranging the abnormality detection circuit in the charging chip, and the indication module is arranged to prompt a user, so that the effect of safe charging and safety accidents caused by blind charging are avoided.

According to the charging equipment provided by the utility model, the magnetic type charging interface is arranged, so that the rechargeable battery can be subjected to magnetic type charging, and the effects of being compatible with charging of batteries with different sizes and not limited by the size of the PVC die on battery signals are achieved.

The charging equipment provided by the utility model has the advantages of simple structure and simple manufacturing process, and can be suitable for large-scale industrial production.

It should be understood that the above description of the related technical solutions of the present utility model is specific and should not be construed as limiting the scope of the present utility model, which is defined by the appended claims. Those skilled in the art should not need any inventive changes or modifications according to the above-mentioned preferred embodiments of the present utility model, and all such technical solutions are included in the scope of the present utility model.

Claims

1. A charging chip, characterized in that the charging chip comprises a base and an internal circuit in the base;

2. The charging chip of claim 1, wherein the internal circuit further comprises: a charging current control circuit;

3. The charging chip of claim 1, wherein the internal circuit further comprises: an abnormality detection circuit;

4. The charging chip of claim 3, wherein the internal circuit further comprises: a charge indication circuit;

5. The charging chip of claim 4, wherein the substrate comprises: the battery charging device comprises a power supply pin, a grounding pin, a first battery charging pin, a second battery charging pin, a first charging indication pin and a second charging indication pin;

6. A charging apparatus, characterized by comprising: a USB interface, a magnetically attractable charging interface, and a charging chip as claimed in any one of claims 1-5;

7. The charging apparatus according to claim 6, wherein an end portion of the magnetically attracted charging interface is provided with a magnetically attracted portion composed of a magnet and a metal sheet.

8. The charging apparatus according to claim 6, further comprising: an indication module;

the indication module is electrically connected with the charging chip.

9. The charging device of claim 6, wherein the charging wire is a flexible charging wire that is bendable.

10. The charging device of claim 8, wherein the indication module comprises: the LED lamp comprises a first LED lamp and a second LED lamp, wherein the first LED lamp is electrically connected with the second LED lamp.