CN110401242B

CN110401242B - Multi-battery parallel charging circuit and method and wearable device with circuit

Info

Publication number: CN110401242B
Application number: CN201910683514.4A
Authority: CN
Inventors: 刘娇
Original assignee: Beijing Shengyun Energy Technology Co ltd
Current assignee: Beijing Shengyun Energy Technology Co ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2022-11-22
Anticipated expiration: 2039-07-26
Also published as: CN110401242A

Abstract

The application relates to a multi-battery parallel circuit, a charging method and wearable equipment, which comprise a charging controller, a current control module, a current detection module and a battery module; the output end of the charging controller is connected with the input ends of the plurality of current control modules; the output end of the current control module is respectively connected with the input ends of the plurality of current detection modules; the output end of the current detection module is respectively connected with the plurality of battery modules, and the current detection module is used for detecting whether the charging current of each access current is greater than a distribution threshold value; the circuit control module is used for controlling the input current of the battery module according to the detection result of the current detection module, can distribute a chargeable threshold value under the control of the charging controller, and controls the detected charging current to be adjusted to be within the chargeable threshold value range according to the detected charging current, so that constant-current charging is realized, and the condition that each battery is not overcharged or slowly charged is avoided.

Description

Multi-battery parallel charging circuit and method and wearable device with circuit

Technical Field

The disclosure relates to the field of charging, and in particular, to a multi-battery parallel charging circuit and method, and a wearable device having the same.

Background

With the continuous development of the technology, the current terminal products (including intelligent wearable products) mostly adopt non-detachable built-in batteries to realize the ultrathin and beautiful design of the mobile phone; due to the size limitation of the intelligent wearable product, the power consumption and the endurance time become the road blocking stones limited by the design of the current intelligent wearable product, and the problem becomes more and more prominent along with the upgrading of the application. And the energy density of the battery cannot be greatly improved in a short period of time. Thus, it is necessary to consider finding some parallel small space to add batteries beyond some non-fixed motherboard locations.

However, because the internal resistances of the small battery and the main battery are different, if parallel charging is carried out, the problem of over-charging of the small battery and over-low charging current of the large battery are caused, and the problem of slow charging is considered in the prior art that the over-charging of the small battery is carried out by adopting a method of adding two charging circuits, and the problem of slow charging of the over-charging of the large battery is caused by over-charging of the large battery is considered, however, the method of adding two charging circuits can cause one or more charging circuits to be added, and the cost is increased; the prior art has the above problems; based on the problem, a technical solution is needed to solve the above problems related to charging multiple batteries, batteries with different capacities, and overcharge or slow charging caused by different charging currents.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

The multi-battery parallel charging circuit and the multi-battery parallel charging system are provided for the situation that in the multi-battery parallel charging process, due to the fact that the electric quantity of each battery is different, overcharge or slow charging is caused, and the problem that charging of multiple batteries is either overcharge or slow charging is solved.

In order to solve the technical problem, one technical scheme adopted by the embodiment of the invention is to provide a multi-battery parallel circuit, which comprises a charging controller, a current control module, a current detection module and a battery module, wherein the charging controller is used for controlling the charging of the battery module; the output end of the charging controller is connected with the input ends of the plurality of current control modules; the output end of the current control module is respectively connected with the input ends of the plurality of current detection modules; the output end of the current detection module is respectively connected with the plurality of battery modules, and the current detection module is used for detecting whether the charging current of each access current is greater than a distribution threshold value; the circuit control module is used for controlling the input current of the battery module according to the detection result of the current detection module.

In an embodiment of the present disclosure, the charge controller is a PMIC charging chip.

In the embodiment of the present disclosure, the current detection module is composed of a resistor and a triode; one end of the resistor is connected with the output end of the current control module, and the other end of the resistor is connected with the base of the three-pole terminal; and the emitter of the triode is also connected with the output end of the current control module.

In the embodiment of the disclosure, the current control module performs constant current control on the current of the current path circuit.

The embodiment of the invention adopts another technical scheme that a multi-battery parallel charging method is provided, which comprises the following steps:

detecting whether each path charging current is larger than a distribution threshold value;

and if so, outputting a control signal to control the current of the channel to be less than or equal to the distribution threshold.

In the embodiment of the disclosure, detecting whether the charging current of each channel is larger than the chargeable threshold value further comprises setting the chargeable threshold value for the current channel battery allocation according to the capacity of each channel battery and a preset rule.

In the embodiment of the present disclosure, the outputting the control signal controls the current of the path to be less than or equal to the distribution threshold, further comprising detecting whether the charging current of the current path is greater than the distribution threshold, and if so, controlling to reduce the current of the current path to the distribution threshold; if the current is smaller than the distribution threshold, the current of the current path is increased to the distribution threshold.

The embodiment of the invention adopts another technical scheme that wearable equipment is provided, which is characterized by comprising the following components:

at least one processor;

and the number of the first and second groups,

a memory communicatively coupled to the at least one processor; wherein the memory stores a program of instructions executable by the at least one processor to cause the at least one processor to perform the multi-battery parallel charging method as described above.

According to another technical scheme adopted by the embodiment of the invention, the wearable device comprises a shell, a main control device, a first power supply and a second power supply, wherein the first power supply and the second power supply are respectively positioned at different parts of a space formed by the shell. The second power supply is an integrated, self-contained device, the second power supply configured as the circuit of any of claims 1-4.

In an embodiment of the present disclosure, the second power source includes one battery or a plurality of batteries connected in parallel, and is used for supplying power to the main control device, and when it is detected that the first electric quantity is smaller than the preset threshold value, the second power source is started to supply power to the main control device.

According to the various embodiments provided by the application, the chargeable threshold value can be distributed under the control of the charging controller, and the detected charging current is controlled to be adjusted to be within the range of the chargeable threshold value according to the detected charging current, so that constant-current charging is realized, and the condition that each battery is not overcharged or slowly charged is ensured.

Meanwhile, the small-package separation device is adopted for the wearable device, the parallel charging scheme of multiple batteries is realized, a reliable charging mechanism is realized for intelligent wearable products and the like, the reliability and the stability of the products are improved, and the after-sale maintenance cost is reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic hardware structure diagram of an implementation manner of a wearable device according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an embodiment of a wearable device provided in an embodiment of the present application;

fig. 3 is a schematic diagram of an implementation manner of a wearable device provided in an embodiment of the present application;

fig. 4 is a block diagram of a multi-battery parallel charging circuit according to an embodiment of the present disclosure;

fig. 5 is a diagram of an implementation of a multi-battery parallel charging circuit according to an embodiment of the present disclosure;

fig. 6 is a flowchart of a multi-battery parallel charging method according to an embodiment of the present disclosure;

fig. 7 is a block diagram of a wearable device according to an embodiment of the present disclosure.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

A mobile terminal implementing various embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description, suffixes such as "module", "part", or "unit" used to indicate elements are used only for facilitating the description of the present invention, and do not have a specific meaning per se. Thus, "module" and "component" may be used in a mixture.

The wearable device provided by the embodiment of the invention comprises a smart bracelet, a smart watch, a smart phone and other mobile terminals. With the continuous development of screen technologies, screen forms such as flexible screens and folding screens appear, and mobile terminals such as smart phones can also be used as wearable devices. The wearable device provided in the embodiment of the present invention may include: an RF (Radio Frequency) unit, a WiFi module, an audio output unit, an a/V (audio/video) input unit, a sensor, a display unit, a user input unit, an interface unit, a memory, a processor, and a power supply.

In the following description, a wearable device will be taken as an example, please refer to fig. 1, which is a schematic diagram of a hardware structure of a wearable device for implementing various embodiments of the present invention, where the wearable device 100 may include: an RF (Radio Frequency) unit 101, a WiFi module 102, an audio output unit 103, an a/V (audio/video) input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109, a processor 110, and a power supply 111. Those skilled in the art will appreciate that the wearable device structure shown in fig. 1 does not constitute a limitation of the wearable device, and that the wearable device may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.

The following describes the various components of the wearable device in detail with reference to fig. 1:

the radio frequency unit 101 may be configured to receive and transmit information or during a call, receive and transmit a signal, specifically, the radio frequency unit 101 may transmit uplink information to a base station, and may also receive downlink information transmitted by the base station, and then transmit the downlink information to the processor 110 of the wearable device for processing, where the downlink information transmitted by the base station to the radio frequency unit 101 may be generated according to the uplink information transmitted by the radio frequency unit 101, or may be actively pushed to the radio frequency unit 101 after detecting that information of the wearable device is updated, for example, after detecting that a geographic location of the wearable device changes, the base station may transmit a message notification of the change of the geographic location to the radio frequency unit 101 of the wearable device, and after receiving the message notification, the radio frequency unit 101 may transmit the message notification to the processor 110 of the wearable device for processing, and the processor 110 of the wearable device may control the message notification to be displayed on the display panel 1061 of the wearable device; typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 may also communicate with a network and other devices through wireless communication, which may specifically include: the server may push a message notification of resource update to the wearable device through wireless communication to remind a user of updating the application program if the file resource corresponding to the application program in the server is updated after the wearable device finishes downloading the application program. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System for Mobile communications), GPRS (General Packet Radio Service), CDMA2000 (Code Division Multiple Access 2000 ), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division multiplexing-Long Term Evolution), and TDD-LTE (Time Division multiplexing-Long Term Evolution), etc.

In one embodiment, the wearable device 100 may access an existing communication network by inserting a SIM card.

In another embodiment, the wearable device 100 may be configured with an esim card (Embedded-SIM) to access an existing communication network, and by using the esim card, the internal space of the wearable device may be saved, and the thickness of the wearable device may be reduced.

It is understood that although fig. 1 shows the radio frequency unit 101, it is understood that the radio frequency unit 101 does not belong to the essential constituents of the wearable device, and can be omitted entirely as required within the scope not changing the essence of the invention. The wearable device 100 can realize the short-distance wireless transmission technology with WiFi through the WiFi module 102 alone, and the wearable device can help the user to send and receive e-mails, browse webpages, access streaming media and the like through the WiFi module 102, which provides wireless broadband internet access for the user. Although fig. 1 shows the WiFi module 102, it is understood that it does not belong to the essential constitution of the wearable device, and may be omitted entirely as needed within the scope not changing the essence of the invention.

The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the wearable device 100 is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the wearable device 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, and the like.

The a/V input unit 104 is used to receive audio or video signals. The a/V input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, the Graphics processor 1041 Processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 may receive sounds (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, or the like, and may be capable of processing such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of the phone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.

In one embodiment, the wearable device 100 includes one or more cameras, and by turning on the cameras, capturing of images, photographing, recording, and the like can be achieved, and the positions of the cameras can be set as required.

The wearable device 100 also includes at least one sensor 105, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or the backlight when the wearable device 100 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in various directions (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the gesture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer, tapping), and the like.

In one embodiment, the wearable device 100 further comprises a proximity sensor, and the wearable device can realize non-contact operation by adopting the proximity sensor, so that more operation modes are provided.

In one embodiment, the wearable device 100 further comprises a heart rate sensor, which, when worn, enables detection of heart rate by proximity to the user.

In one embodiment, the wearable device 100 may further include a fingerprint sensor, and by reading the fingerprint, functions such as security verification can be implemented.

The display unit 106 is used to display information input by a user or information provided to the user. The Display unit 106 may include a Display panel 1061, and the Display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

In one embodiment, the display panel 1061 is a flexible display screen, and when the wearable device using the flexible display screen is worn, the screen can be bent, so that the wearable device is more conformable. Optionally, the flexible display screen may adopt an OLED screen body and a graphene screen body, in other embodiments, the flexible display screen may also be made of other display materials, and this embodiment is not limited thereto.

In one embodiment, the display panel 1061 of the wearable device may take a rectangular shape to wrap around when worn. In other embodiments, other approaches may be taken.

The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the wearable device. Specifically, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, may collect a touch operation performed by a user on or near the touch panel 1071 (e.g., an operation performed by the user on or near the touch panel 1071 using a finger, a stylus, or any other suitable object or accessory), and drive a corresponding connection device according to a predetermined program. The touch panel 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and can receive and execute commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 107 may include other input devices 1072 in addition to the touch panel 1071. In particular, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like, without limitation.

In one embodiment, the side of the wearable device 100 may be provided with one or more buttons. The button can realize various modes such as short-time pressing, long-time pressing, rotation and the like, thereby realizing various operation effects. The number of the buttons can be multiple, and different buttons can be combined for use to realize multiple operation functions.

Further, the touch panel 1071 may cover the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although in fig. 1, the touch panel 1071 and the display panel 1061 are two independent components to implement the input and output functions of the wearable device, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the wearable device, and is not limited herein. For example, when receiving a message notification of an application program through the rf unit 101, the processor 110 may control the message notification to be displayed in a predetermined area of the display panel 1061, where the predetermined area corresponds to a certain area of the touch panel 1071, and perform a touch operation on the certain area of the touch panel 1071 to control the message notification displayed in the corresponding area on the display panel 1061.

The interface unit 108 serves as an interface through which at least one external device is connected to the wearable apparatus 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the wearable apparatus 100 or may be used to transmit data between the wearable apparatus 100 and the external device.

In one embodiment, the interface unit 108 of the wearable device 100 is configured as a contact, and is connected to another corresponding device through the contact to implement functions such as charging and connection. The contact can also be waterproof.

The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 110 is a control center of the wearable device, and is connected to various parts of the entire wearable device through various interfaces and lines, and performs various functions and processes of the wearable device by operating or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the wearable device. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.

The wearable device 100 may further include a power source 111 (such as a battery) for supplying power to various components, and preferably, the power source 111 may be logically connected to the processor 110 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system.

Although not shown in fig. 1, the wearable device 100 may further include a bluetooth module or the like, which is not described herein. The wearable device 100 can be connected with other terminal devices through bluetooth, so that communication and information interaction are realized.

Fig. 2 to fig. 3 are schematic structural diagrams of a wearable device according to an embodiment of the present invention. The wearable device in the embodiment of the invention comprises a flexible screen. When the wearable device is unfolded, the flexible screen is in a strip shape; when the wearable device is in a wearing state, the flexible screen is bent to be annular. Fig. 2 shows a structural diagram of the wearable device screen when the wearable device screen is unfolded, and fig. 4 shows a structural diagram of the wearable device screen when the wearable device screen is bent.

Based on the above embodiments, it can be seen that, if the device is a watch, a bracelet, or a wearable device, the screen of the device may not cover the watchband region of the device, and may also cover the watchband region of the device. Here, the present application proposes an optional implementation manner, in which the device may be a watch, a bracelet, or a wearable device, and the device includes a screen and a connection portion. The screen may be a flexible screen, and the connecting portion may be a watch band. Optionally, the screen of the device or the display area of the screen may partially or completely cover the watchband of the device. As shown in fig. 2, the screen of the device extends to both sides, partially covering the wristband of the device. In other embodiments, the screen of the device may also be entirely covered on the watchband of the device, and this is not limited in this application.

Based on the hardware structure of the wearable device, various embodiments of the multi-battery parallel charging method and device are provided.

Example one

As shown in fig. 4, the present invention is directed to a multi-cell parallel charging circuit, which in some embodiments is capable of charging two or more cells in parallel or sequentially. The system is in a terminal device including a wearable device, for example, in the application, a wristwatch is taken as an embodiment, and a small packaged separate device is adopted to be packaged together with a main battery in a containing space of the wearable device, independently from the system of the terminal device.

Based on wearable equipment's characteristics, for the ultra-thin pleasing to the eye design of product, be restricted to the restriction of product volume again simultaneously, consequently in the use, because the main battery can not satisfy user's demand completely usually, and need increase extra auxiliary battery and improve duration, this application is based on such a problem, in the wearable equipment based on current ultra-thin usually, use the wristwatch as the embodiment, with the form of the separator of extra little encapsulation, install in wearable equipment with the battery that increases in addition, do not possess the limited space of wearable equipment itself, in addition, relatively independent encapsulation separator, also be convenient for follow-up maintenance or demand such as replacement battery, wearable equipment's battery duration has been improved greatly, promote user's use experience.

As shown in fig. 4, a multi-battery parallel charging circuit includes a charge controller 101; a current control module 102; a current detection module 103 and a battery module 104; the charging controller 101 is connected to input ends of a plurality of current control modules 102 through ports, in an embodiment of the present application, the number of the current control modules 102 is one or more, the number of the current control modules 102 is determined according to the number of batteries of the second power supply module, and when only one external battery is connected in an independent packaging device, the number of the current control modules is one; when multiple external batteries exist in the independent packaging device, the number of the current control modules is multiple; the charging controller 101 is a PMIC independent charging chip.

As shown in fig. 2 to 3 and fig. 7, a wearable device includes a housing, a main control device, and a first battery and a second battery, where the first power supply and the second power supply are respectively located at different positions of a space formed by the housing. The second battery is an integrated, separately packaged device. The second power supply comprises a battery or a plurality of batteries connected in parallel and is used for supplying power to the main control equipment, and under the condition that the electric quantity of the first power supply is insufficient, the battery in the second power supply is started to supply power to the main control equipment so as to ensure the normal work of the wearable equipment.

As shown in fig. 5, a multi-battery parallel charging system includes a main module, the first power module is a main power supply of a wearable device; the wearable equipment charging system is characterized by further comprising a second power module, wherein the second power module is electrically connected with the first power module, the second power module is electrically connected with the main control module, and the control signal of the main control module is received to charge the wearable equipment.

In the embodiment of the present application, the charge controller 101 is an integrated circuit (PMIC) that includes various power rails and power management functions in a single chip. PMICs are often used to power small-sized, battery-powered devices because integrating multiple functions into a single chip can provide higher space utilization and system power efficiency. Common functions integrated within the PMIC include voltage converters and regulators, battery chargers, battery gauges, LED drivers, real time clocks, power sequencers, and power control.

Low power PMIC provides the high efficiency and small size required for space constrained applications such as wearable devices, ear-worn devices, sensors, and IoT devices. The high performance PMIC maximizes the utilization of power per watt while improving system performance and is well suited for compute intensive platforms such as system on chip (SoC), FPGA and application processors. Moreover, the separation device is low in cost and suitable for popularization on the mobile terminal.

The PMIC current control module 102 controls the overall current of the three batteries; the current magnitude was confirmed according to the capacities and charging rates of the three batteries.

Specifically, as shown in fig. 5, the number of the current control modules 102 is multiple, an input end of each current control module 102 is connected to an output end of the charge controller 101, each current control module 102 is connected to an input end of the current detection module 103, and an output end of the circuit detection module 103 is connected to an input end of the battery module.

The current detection module 103 is formed by connecting a resistor and a triode; the current control module 102 has two output terminals respectively connected to the resistor and the input terminal of the triode. One end of the resistor is connected with the output end of the current control module, and the other end of the resistor is connected with the base of the three-pole terminal; and the emitter of the triode is also connected with the output end of the current control module.

The battery module 104 is a circuit formed by one or more dry batteries; the capacity of each dry battery can all be different, can conveniently set up (transfer monitoring current) to the little battery of different capacities like this, effectively prevents overcharge and charge rate and crosses low problem.

Because the battery capacity of each battery module is different, the situation that each battery is unevenly charged during charging occurs, for example, the battery capacity of the battery 1 is 300mAh, the battery capacity of the battery 2 is 200mAh, the battery capacity of the battery 3 is 100mAh, and three capacitors are respectively the maximum 1C rechargeable battery.

Setting a maximum charging current threshold value by the charging controller 101, acquiring the maximum battery capacity of each battery in the battery module by the charging controller 101, and setting the maximum charging threshold value of each battery according to the set maximum charging current threshold value and the maximum capacity of each battery according to a preset rule, wherein the preset rule can be that the maximum chargeable threshold value is allocated according to the ratio of the maximum capacity of each battery, or the preset rule is that the capacity value of each battery is weighted and allocated according to a weighting coefficient; in any of the above, the sum of the maximum chargeable thresholds of the respective batteries is less than or equal to the maximum charging current threshold. For example, PMIC controls the maximum charging current to be 550mAh; the charging current limit for each cell was 280mAh for cell 1, 185mAh for cell 2 and 85mAh for cell 3. This does not cause overcharge nor slow charging.

The current control module 102 performs constant current control on the charging current, specifically: and (3) a constant current charging stage: the current control module 1 detects the charging current of a path where each battery is located, when the chargeable threshold value distributed to the current path is detected, the base voltage of the first triode is properly reduced, and according to the control principle of the triodes, the Ic1 current passing through the first triode is also reduced; until the current at Ic1 is less than or equal to the allocated chargeable threshold. Similarly, if the Ic1 current is found to be small, the base voltage of the first transistor is properly increased, and the Ic1 current is increased to reach the allocated chargeable threshold current.

Similarly, the current control module 2 detects the charging current of the second path, and when detecting that the charging current is greater than the allocated chargeable threshold, for example 185mA, the base voltage of the Q2 transistor is appropriately reduced, and according to the control principle of the triode, the Ic2 current passing through the Q2 transistor is also reduced; until the current for Ic2 is 185mAh or less. If the detected current Ic1 is less than 140mA, the base voltage of the Q2 tube is properly increased, and the current Ic1 is increased to reach about 185mAh. Similarly, the current control module 3 detects the path charging current of BAT3, when detecting that the charging current is greater than 85mA, the base voltage of the Q3 tube is properly reduced, and according to the control principle of the triode, the Ic3 current passing through the Q3 tube is also reduced after being reduced; until the current for Ic3 is less than or equal to 85mAh. If the detected current Ic3 is less than 50mA, the base voltage of the Q3 tube is properly increased, and the current Ic3 is increased to reach about 85mAh.

The second embodiment:

as shown in fig. 6, a method for charging multiple batteries in parallel specifically includes:

s1, detecting whether the charging current of each channel is greater than a distribution threshold value;

step S2: and if so, outputting a control signal to control the current of the channel to be less than or equal to the distribution threshold.

Specifically, the method comprises the following steps: step S1 further includes step S11: detecting whether the charging current of each path is larger than the distribution threshold value, and further setting a chargeable threshold value for the current path battery distribution according to the capacity of each path battery and a preset rule.

The step S2 comprises the step S21 that the control signal is output to control the current of the path to be less than or equal to the distribution threshold, and the step S further comprises the steps of detecting whether the charging current of the current path is greater than the chargeable threshold, and if so, controlling to reduce the current of the current path to the distribution threshold; if the current is smaller than the distribution threshold, the current of the current path is increased to be the distribution threshold.

The specific control method of the above methods has already been described in the apparatus, and the features are the same and will not be described repeatedly.

Example three:

it should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are also included in the scope of the present invention.

Claims

1. A multi-battery parallel circuit is characterized by comprising a charging controller, a current control module, a current detection module and a battery module; the output end of the charging controller is connected with the input ends of the plurality of current control modules; the output end of the current control module is respectively connected with the input ends of the plurality of current detection modules; the output end of the current detection module is respectively connected with the plurality of battery modules, and the current detection module is used for detecting whether the charging current of each access current is greater than a distribution threshold value; the current control module is used for controlling the input current of the battery module according to the detection result of the current detection module; the charging controller is used for setting a maximum charging current threshold value, and respectively setting the maximum chargeable threshold value of each battery according to a preset rule according to the maximum charging current threshold value and the maximum capacity of the battery in each passage.

2. A multi-cell parallel circuit according to claim 1, wherein the charge controller is a PMIC charging chip.

3. A multi-cell parallel circuit according to claim 1, wherein said current sensing block is comprised of a resistor and a transistor; one end of the resistor is connected with the output end of the current control module, and the other end of the resistor is connected with the base of the three-pole terminal; and the emitter of the triode is also connected with the output end of the current control module.

4. The multi-cell parallel circuit of claim 1, wherein the current control module performs constant current control on the current path circuit current.

5. A multi-battery parallel charging method is characterized by comprising the following steps:

detecting whether each path charging current is greater than a distribution threshold;

if yes, outputting a control signal to control the current of the passage to be less than or equal to the distribution threshold value;

wherein the detecting whether each path charging current is greater than an allocation threshold comprises: and setting a chargeable threshold value for the current path battery allocation according to the capacity of each path battery and a preset rule.

6. The method of claim 5, wherein the outputting the control signal controls the current of the path to be less than or equal to the distribution threshold, further comprising detecting whether the charging current of the current path is greater than the chargeable threshold, and if so, controlling to reduce the current of the current path to the distribution threshold; if the current is smaller than the distribution threshold, the current of the current path is increased to the distribution threshold.

7. A wearable device, comprising:

at least one processor;

and the number of the first and second groups,

a memory communicatively coupled to the at least one processor; wherein the memory stores a program of instructions executable by the at least one processor to cause the at least one processor to perform the method of any one of claims 5 to 6.

8. A wearable device is characterized by comprising a shell, a main control device and a first power supply and a second power supply, wherein the first power supply and the second power supply are respectively positioned at different parts of a space formed by the shell, the second power supply is an integrated independently packaged device, and the second power supply is configured into the circuit of any one of claims 1-4.

9. The wearable device of claim 8, wherein the second power source comprises a battery or a plurality of batteries connected in parallel, each of the batteries is used for supplying power to the main control device, and when the first power amount is detected to be less than the preset threshold, the second power source is started to supply power to the main control device.