Control circuit for a multi-functional battery charger and a multi-functional camera battery charger

Abstract

The utility model discloses a control circuit and multi -functional camera battery charging box of multi -functional battery charging box, this control circuit of multi -functional battery charging box includes interface module, and interface module is used for electric connection user terminal, and data reading module includes at least one card slot, and card slot is used for the storage card plug -in of supply, and data reading module reads the data of storage card through card slot, and is transmitted to interface module, and power management module includes at least one battery port, and power management module electric connection interface module and battery port, and power management module is used for the electric connection of on -off interface module and battery port, and main control chip electric connection interface module, power management module and data reading module, and main control chip is used for controlling power management module and data reading module at least one work.

Description

Technical Field

[0001] This utility model relates to the field of charging technology, and in particular to a control circuit for a multi-functional battery charging box and a multi-functional camera battery charging box. Background Technology

[0002] With the rapid development and widespread adoption of digital photography technology, camera equipment is increasingly used in professional photography and everyday life. As a crucial component of camera equipment, the camera battery's battery life and charging convenience directly impact the efficiency of photographic work and the user experience. To meet the needs of photographers in various scenarios, camera battery charging cases have emerged as a portable charging solution, providing the photography industry with a more flexible and efficient power management method.

[0003] Currently, camera battery charging cases with integrated card reader functionality are available on the market. These products not only charge camera batteries but also integrate memory card reading capabilities, allowing users to directly access data from camera memory cards and transfer the data to computers or other devices.

[0004] However, existing camera battery charging cases with card reader functionality have the following drawbacks: the charging function and card reader function of these products require separate external USB interfaces. That is, the charging interface is dedicated to charging the battery, and the data transfer interface is dedicated to reading data from the memory card. The two functions cannot share the same interface. Utility Model Content

[0005] The main purpose of this invention is to propose a control circuit for a multi-functional battery charging box, which aims to solve the problem that existing camera battery charging boxes require separate external USB interfaces for charging and card reading functions.

[0006] To achieve the above objectives, this utility model proposes a control circuit for a multi-functional battery charging box, which includes: An interface module, which is used for electrical connection to a user terminal; A data reading module is electrically connected to the interface module. The data reading module includes at least one card slot for inserting a memory card. The data reading module reads data from the memory card through the card slot and transmits it to the interface module. A power management module, the power management module including at least one battery port, the power management module being electrically connected to the interface module and the battery port, the power management module being used to turn on or off the electrical connection between the interface module and the battery port; The main control chip is electrically connected to the interface module, the power management module, and the data reading module. The main control chip is used to control at least one of the power management module and the data reading module to work.

[0007] In some embodiments, the interface module is one or more of Micro USB and Type-C.

[0008] In some embodiments, the data reading module includes: A data conversion chip, the data conversion chip including a first communication terminal, a second communication terminal and a detection terminal, wherein the first communication terminal and the detection terminal are respectively electrically connected to the card slot; A first analog switch, comprising a first control terminal, a first transmission terminal, and a second transmission terminal, wherein the first control terminal is electrically connected to the main control chip, the first transmission terminal is electrically connected to the data conversion chip, and the second transmission terminal is electrically connected to the interface module; The second analog switch includes a second control terminal, a third transmission terminal, and a fourth transmission terminal. The second control terminal is electrically connected to the main control chip, the third transmission terminal is electrically connected to the data conversion chip, and the fourth transmission terminal is electrically connected to the interface module.

[0009] In some embodiments, the second analog switch further includes two DP / DM ports, one of which is electrically connected to the interface module, and the other of which is electrically connected to the main control chip.

[0010] In some embodiments, the first analog switch is a USB 3.0 analog switch and the second analog switch is a USB 2.0 analog switch.

[0011] In some embodiments, the data reading module further includes: The power processing chip includes a first input terminal and a first output terminal, wherein the first output terminal is electrically connected to the data conversion chip; A first switching transistor, one of its conducting terminals is electrically connected to the interface module, and the other conducting terminal is electrically connected to the first input terminal; The second switch has one conducting terminal electrically connected to the interface module and the other conducting terminal electrically connected to the first output terminal.

[0012] In some embodiments, the power management module includes: A battery charging management unit includes a second input terminal, a first connection terminal, and a second output terminal. The second input terminal is electrically connected to the interface module, the first connection terminal is electrically connected to the main control chip, and the second output terminal is electrically connected to the battery port. A power management unit, comprising a third input terminal and a third output terminal, wherein the third input terminal is electrically connected to the interface module and the third output terminal is electrically connected to the main control chip; The power management unit operates when the interface module is connected to the user terminal, and simultaneously activates the main control chip by outputting a level signal through the third output terminal.

[0013] In some embodiments, an interaction module is also included, which is electrically connected to the main control chip.

[0014] In some embodiments, a temperature detection module is further included. The temperature detection module is electrically connected to the main control chip and the battery port, respectively. The temperature detection module is used to collect battery temperature information and feed it back to the main control chip.

[0015] This utility model further proposes a multi-functional camera battery charging box, including the control circuit of the multi-functional battery charging box as described in the foregoing embodiments.

[0016] The beneficial effects of this utility model are as follows: By setting a main control chip to uniformly control the power management module and the data reading module, and connecting both modules to the user terminal through the same interface module, the technical effect of sharing a single external interface for charging and data transmission functions is achieved. This effectively solves the inconvenience caused by the need to set separate charging and data transmission interfaces in existing technologies. When the user needs to transmit data, the main control chip controls the data reading module to work, and the data in the memory card is transmitted to the user terminal through the data reading module and the interface module. When the user needs to charge, the main control chip controls the power management module to work, and provides charging current to the battery through the interface module. At the same time, due to the adoption of a unified main control chip control architecture, charging and data transmission can be carried out simultaneously, improving the product's ease of use and work efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the module electrical connections of the control circuit of the multifunctional battery charging box in one embodiment of the present invention; Figure 2 This is a circuit diagram of the control circuit of the multifunctional battery charging box in one embodiment of the present invention.

[0018] Explanation of icon numbers: 100. Interface module; 200. Data reading module; U1, power processing chip; A1, first input terminal; A2, first output terminal; Q1, First switching transistor; Q2, the second switching transistor; U2, data conversion chip; A8, first communication terminal; A3, second communication terminal; A4, detection terminal; U3, First analog switch; A5, First control terminal; A6, First transmission terminal; A7, Second transmission terminal; U4, second analog switch; B1, second control terminal; B2, third transmission terminal; B4, fourth transmission terminal; 300. Power Management Module; 301. Battery Port; U6, Battery charging management unit; B5, Second input terminal; B6, First connection terminal; B7, Second output terminal; U7, Power Management Unit; B8, Third Input Terminal; B9, Third Output Terminal; 400. Main control chip; 500. Interactive module; 600. Temperature detection module.

[0019] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0021] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0022] It should also be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or may have an intervening component present. When a component is referred to as "connected to" another component, it can be directly connected to the other component or may have an intervening component present.

[0023] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0024] Reference Figure 1 and Figure 2 This utility model provides a multifunctional battery charging and control circuit, comprising: Interface module 100, which is used for electrical connection to user terminal; The data reading module 200 is electrically connected to the interface module 100. The data reading module 200 includes at least one card slot for inserting a memory card. The data reading module 200 reads data from the memory card through the card slot and transmits it to the interface module 100. The power management module 300 includes at least one battery port 301. The power management module 300 is electrically connected to the interface module 100 and the battery port 301. The power management module 300 is used to turn on or off the electrical connection between the interface module 100 and the battery port 301. The main control chip 400 is electrically connected to the interface module 100, the power management module 300, and the data reading module 200. The main control chip 400 is used to control at least one of the power management module 300 and the data reading module 200 to work.

[0025] In this embodiment, the interface module 100 serves as the external communication hub of the entire system, primarily undertaking the dual functions of power input and data transmission. Specifically, the interface module 100 can adopt a USB-C interface, a Micro USB interface, a Lightning interface, or other standardized interface forms. In this embodiment, a USB-C interface is preferred. This interface is electrically connected to a power supply device (such as a computer, charger, or power bank) via a power cable, providing operating power to subsequent circuit components. Simultaneously, this interface also supports high-speed data transmission and can automatically adapt to USB 2.0, USB 3.0, USB 3.1, or higher transmission standards according to the protocol of the connected device.

[0026] In this embodiment, the data reading module 200 performs the core functions of storage medium identification, data reading and writing, and protocol conversion. This module includes at least one card slot, which can be designed to support a single model of TF card (Micro SD card), SD card, CF card, or other mainstream memory card formats, or it can be designed as a multi-format card slot to be compatible with multiple memory card specifications. The data reading module 200 has a hot-plug detection function, capable of monitoring the insertion and removal status of memory cards in the card slot in real time. When a memory card is detected being inserted, the module first initializes the memory card and identifies its parameters, then uses a built-in protocol conversion chip to convert the memory card's raw data format into a standard USB transmission protocol format. Furthermore, this module also has a handshake protocol function, enabling communication negotiation with the host computer to automatically identify the transmission protocol type and transmission rate supported by the connected device, ensuring the stability and compatibility of data transmission.

[0027] In this embodiment, the power management module 300 is primarily responsible for power distribution, voltage regulation, and charging control. This module includes at least one battery port 301, which can be configured as a single battery port 301 or multiple battery ports 301. The power management module 300 adopts a modular design concept, and can be divided into two relatively independent sub-modules: an activation power module and a charging power module. The activation power module is specifically responsible for providing a stable operating power supply to the main control chip 400, ensuring reliable system startup and continuous operation; the charging power module is specifically responsible for battery charging, providing corresponding charging current and voltage according to different battery types and charging protocols. This modular design not only improves circuit reliability but also facilitates later maintenance and upgrades. The power management module 300 also integrates multiple safety protection mechanisms, including overvoltage protection, overcurrent protection, and short-circuit protection, to ensure the safety of the charging process.

[0028] The main control chip 400 serves as the control center of the entire system, responsible for coordinating the working status and data flow of each module. The main control chip 400 can be an ARM-based microcontroller, a DSP processor, or a dedicated multimedia control chip. In this embodiment, the main control chip 400 has multiple operating modes: standby mode, data transmission mode, charging mode, and mixed operating mode. The chip integrates a rich set of peripheral interfaces, including a USB controller, power management unit, GPIO interface, and ADC converter, enabling precise control and status monitoring of each functional module.

[0029] The working process of this embodiment can be divided into four main stages: system initialization, protocol matching, data transmission, and battery charging. The specific workflow is as follows: During the system initialization phase, when the interface module 100 is connected to the host computer via a cable (e.g., via a USB-C interface), the power management module 300 first detects the external power input and performs preliminary voltage and current checks. After the checks are complete, the power module is activated to provide a stable power supply to the main control chip 400, waking it from sleep mode and initiating the initialization process. During startup, the main control chip 400 sequentially checks the connection status and operational status of each functional module to ensure the system is in normal working order.

[0030] During the protocol matching phase, after the main control chip 400 is activated, it first controls the analog switch in the data reading module 200 to connect the DP / DM data line of the interface module 100 to the corresponding port of the main control chip 400. Through these ports, the main control chip 400 performs a handshake and matching of the charging protocol with the host computer. The system supports multiple fast charging protocols, including but not limited to QC (QuickCharge), PD (Power Delivery), and AFC (Adaptive Fast Charging). During the protocol matching process, the main control chip 400 automatically selects the optimal charging protocol based on the host computer's response and records the corresponding voltage and current parameters to prepare for the subsequent charging process.

[0031] During the data transmission phase, after protocol matching is completed, the main control chip 400 begins to detect the power supply voltage of the interface module 100. Based on the detected voltage value, the main control chip 400 selects an appropriate power management strategy: when the detected voltage of the USB-C port is 5V, the system directly controls the first switch Q1 to conduct, providing direct power to the data reading module 200; when the detected voltage is higher than 5V, the system activates the built-in step-down module to adjust the voltage to the operating voltage required by the data reading module 200 (usually 5V). In other embodiments, depending on the specific needs of the data reading module 200, the voltage can also be adjusted to different voltage levels such as 6V, 7V, and 8V.

[0032] After receiving a stable power supply, the data reading module 200 begins executing the memory card detection program. When the system detects an inserted TF card, SD card, or other memory card, the data reading module 200 immediately establishes a data transmission handshake protocol with the host computer, negotiating the data transmission standard supported by the host computer (such as USB 2.0, USB 3.0, USB 3.1, etc.). After successful protocol recognition, the data reading module 200 configures the corresponding data transmission parameters according to the matched transmission protocol, including transmission rate, data packet size, error checking method, etc., and then begins performing read and write operations on the memory card.

[0033] During the battery charging phase, while the data transmission function operates normally, if a battery to be charged is detected connected to battery port 301, the main control chip 400 will initiate the battery charging program. First, the system will identify the type and detect the status of the connected battery, including parameters such as rated voltage, capacity, current charge level, and temperature. This embodiment primarily uses camera batteries (such as LP-E6 and NP-FW50 models) as the main application scenario, but the system also supports other types of lithium-ion batteries, nickel-metal hydride batteries, etc.

[0034] After battery parameter identification, the main control chip 400 calculates the optimal charging strategy based on the previously matched charging protocol and battery characteristics. The charging process employs a multi-stage charging mode: the pre-charging stage uses a small current to activate the deeply discharged battery; the constant current charging stage uses a larger current to quickly replenish the battery's charge; the constant voltage charging stage reduces the charging current as the battery approaches full charge to avoid overcharging; and the trickle charging stage maintains a small current after the battery is fully charged to keep the battery in optimal condition. Throughout the entire charging process, the system continuously monitors parameters such as battery temperature, voltage, and current to ensure charging safety.

[0035] The beneficial effects of this utility model are as follows: By setting the main control chip 400 to uniformly control the power management module 300 and the data reading module 200, and connecting both modules to the user terminal through the same interface module 100, the technical effect of sharing a single external interface for charging and data transmission functions is achieved, effectively solving the inconvenience caused by the need to set separate charging and data transmission interfaces in the prior art. When the user needs to transmit data, the main control chip 400 controls the data reading module 200 to work, and the data in the memory card is transmitted to the user terminal through the data reading module 200 and the interface module 100; when the user needs to charge, the main control chip 400 controls the power management module 300 to work, and provides charging current to the battery through the interface module 100; at the same time, due to the adoption of a unified main control chip 400 control architecture, charging and data transmission can be carried out simultaneously, improving the convenience and efficiency of the product.

[0036] Continue reading Figure 2 In some embodiments, the data reading module 200 includes: The data conversion chip U2 includes a first communication terminal A8, a second communication terminal A3, and a detection terminal A4. The first communication terminal A8 and the detection terminal A4 are electrically connected to the card slot, respectively. The first analog switch U3 includes a first control terminal A5, a first transmission terminal A6, and a second transmission terminal A7. The first control terminal A5 is electrically connected to the main control chip 400, the first transmission terminal A6 is electrically connected to the data conversion chip U2, and the second transmission terminal A7 is electrically connected to the interface module 100. The second analog switch U4 includes a second control terminal B1, a third transmission terminal B2 and a fourth transmission terminal B4. The second control terminal B1 is electrically connected to the main control chip 400, the third transmission terminal B2 is electrically connected to the data conversion chip U2, and the fourth transmission terminal B4 is electrically connected to the interface module 100.

[0037] In this embodiment, the data conversion chip U2 serves as the core processing unit of the data reading module 200, responsible for converting between the memory card interface protocol and the USB transmission protocol. In this embodiment, the data conversion chip U2 can be a GL3224 chip, a dedicated USB signal to SDIO signal conversion chip with high integration and stable data conversion performance. The data conversion chip U2 includes a first communication terminal A8, a second communication terminal A3, and a detection terminal A4. The first communication terminal A8 connects to the first TF / SD card slot, and the second communication terminal A3 connects to the second TF / SD card slot, enabling simultaneous support for both card slots. The detection terminal A4 is further subdivided into a first detection terminal and a second detection terminal, respectively connected to the two TF / SD card slots, for real-time monitoring of the insertion and removal status of the memory cards. This dual-card slot design not only improves the practicality of the device but also provides users with greater storage capacity and data backup options.

[0038] In this embodiment, the first analog switch U3 can be a USB 3.0 analog switch, specifically responsible for controlling the high-speed data transmission channel. This switch includes a first control terminal A5, a first transmission terminal A6, and a second transmission terminal A7. The first control terminal A5 is electrically connected to the main control chip 400 and receives switch control signals from the main control chip 400; the first transmission terminal A6 is electrically connected to the high-speed data output terminal of the data conversion chip U2; and the second transmission terminal A7 is electrically connected to the USB 3.0 data line of the interface module 100. The USB 3.0 analog switch supports data transmission rates up to 5Gbps, which can meet the needs of high-capacity memory cards for fast data transmission.

[0039] The second analog switch U4 can be a USB 2.0 analog switch, primarily responsible for standard speed data transmission and backward compatibility. This switch also includes a second control terminal B1, a third transmission terminal B2, and a fourth transmission terminal B4. The second control terminal B1 is electrically connected to the main control chip 400; the third transmission terminal B2 is electrically connected to the standard speed data output terminal of the data conversion chip U2; and the fourth transmission terminal B4 is electrically connected to the USB 2.0 data line of the interface module 100. The USB 2.0 analog switch supports a maximum data transmission rate of 480Mbps, ensuring compatibility with older devices.

[0040] The working process of this embodiment is mainly divided into two stages: protocol identification and data transmission. The first stage is protocol identification. After the interface module 100 establishes a connection with the host computer, the main control chip 400 simultaneously controls the first analog switch U3 and the second analog switch U4 to enter test mode. In this mode, the data conversion chip U2 sends USB 3.0 and USB 2.0 handshake signals to the interface module 100 through the two analog switches respectively. After receiving these signals, the host computer responds accordingly based on the protocol types it supports. By analyzing the host computer's response signals, the main control chip 400 can accurately identify the highest USB protocol version supported by the connected device.

[0041] During the data transmission phase, after protocol identification is completed, the main control chip 400 selects the corresponding analog switch for data transmission based on the identification result. If the host computer supports the USB 3.0 protocol, the main control chip 400 will control the first analog switch U3 to conduct while simultaneously turning off the second analog switch U4, establishing a USB 3.0 high-speed data transmission channel. If the host computer only supports the USB 2.0 protocol, it will control the second analog switch U4 to conduct and turn off the first analog switch U3, establishing a USB 2.0 standard speed transmission channel. This intelligent switching mechanism ensures that the system can achieve optimal data transmission performance in different hardware environments.

[0042] When a memory card is inserted into any slot, the corresponding detection terminal A4 sends a detection signal to the data conversion chip U2. The data conversion chip U2 then performs initialization operations on the memory card, including reading parameters such as the memory card's capacity, file system type, and transfer speed. After initialization, the data conversion chip U2 converts the memory card's SDIO signal into a standard USB data format and transmits the data to the host computer through the established USB transmission channel.

[0043] Thus, through a dual analog switch design, the system can automatically identify and adapt to different USB protocol versions, ensuring optimal transmission performance for high-speed devices while maintaining good compatibility with low-speed devices. Simultaneously, the U2 data conversion chip supports a dual TF / SD card slot design, allowing users to insert two memory cards simultaneously for data operations, greatly improving the device's usability and work efficiency.

[0044] Continue reading Figure 2 In this embodiment, the second analog switch U4 also includes two DP / DM ports, one of which is electrically connected to the interface module 100, and the other DP / DM port is electrically connected to the main control chip 400.

[0045] In this embodiment, the second analog switch U4, in addition to its original data transmission function, integrates two DP / DM ports. One DP / DM port is electrically connected to the interface module 100 for direct communication with an external host computer; the other DP / DM port is electrically connected to the main control chip 400 for protocol control and data exchange with the main control chip 400. This dual-port design enables the second analog switch U4 to not only perform data transmission switching functions but also act as a communication bridge.

[0046] The main control chip 400 precisely controls the second analog switch U4 via a dedicated control line. The control signal transmitted by the control line determines the connectivity of the DP / DM port inside the second analog switch U4, thereby realizing the indirect communication connection between the main control chip 400 and the interface module 100.

[0047] When a charging protocol handshake is required, the main control chip 400 first sends a control signal to the second analog switch U4 via the control line, causing the second analog switch U4 to enter DP / DM communication mode. In this mode, the two DP / DM ports inside the second analog switch U4 are electrically connected, establishing a complete communication link between the main control chip 400 and the interface module 100.

[0048] After the communication link is established, the main control chip 400 sends a protocol identification signal through its connected DP / DM port. This signal is internally connected through the second analog switch U4 and transmitted to the interface module 100 through another DP / DM port, ultimately reaching the host computer. Upon receiving the protocol identification signal, the host computer will respond with a corresponding signal based on its supported charging protocol (such as QC fast charging protocol, PD power transfer protocol, etc.). The response signal is transmitted back to the main control chip 400 along the reverse path, completing a full protocol handshake communication.

[0049] By analyzing the received response signals, the main control chip 400 can accurately identify the charging protocol type supported by the host computer and the corresponding voltage and current parameters. Based on these parameters, the main control chip 400 formulates corresponding charging strategies for subsequent battery charging, including charging voltage regulation, charging current control, and charging stage management, to ensure the safety and efficiency of the charging process.

[0050] Thus, through the communication mechanism of the DP / DM port, the system can support automatic identification and adaptation of multiple mainstream charging protocols, including QC 2.0 / 3.0 fast charging protocols and USB PD protocols, improving the device's versatility. Furthermore, the use of a standard DP / DM communication interface ensures the stability and reliability of the protocol handshake process, reducing the risk of communication errors and protocol identification failures.

[0051] Continue reading Figure 2In this embodiment, the data reading module 200 further includes: The power processing chip U1 includes a first input terminal A1 and a first output terminal A2, and the first output terminal A2 is electrically connected to the data conversion chip U2. The first switch Q1 has one conducting terminal electrically connected to the interface module 100 and the other conducting terminal electrically connected to the first input terminal A1. The second switch Q2 has one conducting terminal electrically connected to the interface module 100, and the other conducting terminal electrically connected to the first output terminal A2.

[0052] In this embodiment, the power processing chip U1, as the core device for power regulation, includes a first input terminal A1 and a first output terminal A2. The first output terminal A2 is electrically connected to the data conversion chip U2, providing it with a stable 5V operating power supply. It should be noted that the power processing chip U1 can be selected in different types according to actual application requirements: when the system mainly deals with high voltage input, a buck chip (such as a Buck converter) can be used; when the system needs to handle low voltage input, a boost chip (such as a Boost converter) can be used; for application scenarios that need to handle both high and low voltage inputs simultaneously, a buck-boost integrated chip (such as a Buck-Boost converter) can also be used to achieve better adaptability.

[0053] One conducting terminal of the first switching transistor Q1 is electrically connected to the interface module 100, and the other conducting terminal is electrically connected to the first input terminal A1 of the power processing chip U1. Under the control of the main control chip 400, this switching transistor determines whether to connect the input power of the interface module 100 to the power processing chip U1 for voltage regulation.

[0054] One of the conducting terminals of the second switching transistor Q2 is electrically connected to the interface module 100, and the other conducting terminal is directly electrically connected to the data conversion chip U2. This is used to provide a direct power supply path when the input voltage meets the requirements, thereby avoiding unnecessary power conversion losses.

[0055] During operation, the main control chip 400 establishes a communication connection with the interface module 100 via the VBUS bus and continuously monitors the input voltage of the interface module 100. VBUS not only performs data communication but also serves as a voltage detection signal line, providing real-time feedback of the current supply voltage value to the main control chip 400. Based on the detected voltage value, the main control chip 400 executes corresponding power management strategies: When the input voltage of the interface module 100 is detected to be 5V, the main control chip 400 directly controls the second switch Q2 to turn on, while keeping the first switch Q1 off. In this mode, the 5V power supply is directly supplied to the data conversion chip U2 through the second switch Q2, achieving the highest power conversion efficiency and reducing power consumption loss.

[0056] When an input voltage higher than 5V is detected (such as 9V, 12V, or other fast charging voltages), the main control chip 400 controls the first switch Q1 to turn on and simultaneously turns off the second switch Q2. The high voltage enters the first input terminal A1 of the power processing chip U1 through the first switch Q1, is stepped down to 5V by the internal voltage regulation circuit, and then provides a stable operating power supply to the data conversion chip U2 through the first output terminal A2.

[0057] During equipment operation, the main control chip 400 continuously monitors changes in the input voltage. When the input voltage fluctuates, the system can automatically switch the power supply path to ensure that the data conversion chip U2 always receives a stable 5V operating power supply, guaranteeing the reliability and stability of data transmission.

[0058] In this embodiment, the power management module 300 includes: The battery charging management unit U6 includes a second input terminal B5, a first connection terminal B6, and a second output terminal B7. The second input terminal B5 is electrically connected to the interface module 100, the first connection terminal B6 is electrically connected to the main control chip 400, and the second output terminal B7 is electrically connected to the battery port 301. The power management unit U7 includes a third input terminal B8 and a third output terminal B9. The third input terminal B8 is electrically connected to the interface module 100, and the third output terminal B9 is electrically connected to the main control chip 400. The power management unit U7 operates when the interface module 100 is connected to the user terminal, and at the same time, it activates the main control chip 400 by outputting a level signal through the third output terminal B9.

[0059] In this embodiment, the power management module 300 adopts a split design, including two relatively independent functional units, which are responsible for the activation of the main control chip 400 and the battery charging management, respectively.

[0060] The battery charging management unit U6, serving as a dedicated controller for battery charging, includes a second input terminal B5, a first connection terminal B6, and a second output terminal B7. The second input terminal B5 is electrically connected to the interface module 100 to receive charging power from the host computer; the first connection terminal B6 is electrically connected to the main control chip 400 to receive charging control commands from the main control chip 400; and the second output terminal B7 is electrically connected to the battery port 301 to provide charging current to the inserted battery. This unit features voltage conversion and current regulation functions, capable of converting the input power into voltage and current parameters suitable for battery charging.

[0061] The power management unit U7 is specifically responsible for activating and powering the main control chip 400, including the third input terminal B8 and the third output terminal B9. The third input terminal B8 is electrically connected to the interface module 100, and the third output terminal B9 is electrically connected to the main control chip 400. This unit can be implemented using different technologies such as a low-dropout linear regulator (LDO), a DC-DC converter, or a dedicated power management chip. Its main function is to start working immediately when the interface module 100 is connected to the host computer, outputting an activation power supply to the main control chip 400. This activation power supply can be 3.3V, or a standard voltage value such as 1.8V, 2.5V, or 5V, depending on the power requirements of the main control chip 400.

[0062] During operation, when the interface module 100 establishes a connection with the host computer, the power management unit U7 first detects the power input signal and then converts the input power into an activation power suitable for the main control chip 400. This activation power is typically 3.3V, but can also be set to standard voltage values ​​such as 1.8V, 2.5V, or 5V depending on the specific specifications of the main control chip 400. The activation power is transmitted to the main control chip 400 through the third output terminal B9, completing the system's power-on activation process.

[0063] During the charging control phase, after the main control chip 400 is activated, it begins executing the charging protocol identification and matching procedure. Once the charging protocol is confirmed, the main control chip 400 sends a charging control command to the battery charging management unit U6 via the first connection terminal B6. Under the control of the main control chip 400, the battery charging management unit U6 converts the power input from the second input terminal B5 into a 6V-8.4V charging power supply, which is then output to the battery port 301 via the second output terminal B7 to charge the inserted camera battery.

[0064] The two management units adopt relatively independent working mechanisms. The power management unit U7 continuously provides a stable power supply to the main control chip 400 to ensure the continuity of system control functions. The battery charging management unit U6 dynamically adjusts the charging parameters according to the instructions of the main control chip 400 and the actual needs of the battery to achieve the best charging effect.

[0065] See Figure 2 In this embodiment, an interaction module 500 is also included, which is electrically connected to the main control chip 400.

[0066] In this embodiment, the interaction module 500 serves as a user interface, providing users with intuitive device status display and operation control functions. In this embodiment, the interaction module 500 can be implemented in various ways: it can be a touchscreen, providing touch operation and graphical display; it can be a combination of an LCD display and physical buttons; it can be a simplified solution of LED indicator lights and push-button switches; or it can use an OLED display to achieve a clearer display effect. The interaction module 500 is electrically connected to the main control chip 400 via a data cable, enabling it to receive control commands from the main control chip 400 in real time and provide feedback on user operation information.

[0067] During operation, the interaction module 500 can display the device's working status in real time, including key information such as charging status, data transmission progress, battery level, and connection status. The main control chip 400 transmits this status information to the interaction module 500 through a data interface, allowing users to intuitively understand the device's current operating status through the display interface.

[0068] When a user operates the interaction module 500 (such as clicking on the touchscreen or pressing a button), the interaction module 500 transmits the operation signal to the main control chip 400. After receiving the operation command, the main control chip 400 executes the corresponding function control, such as starting / stopping charging, switching working modes, and viewing device information.

[0069] In some embodiments, a temperature detection module 600 is also included. The temperature detection module 600 is electrically connected to the main control chip 400 and the battery port 301 respectively. The temperature detection module 600 is used to collect battery temperature information and feed it back to the main control chip 400.

[0070] In this embodiment, a temperature detection module 600 is also included. The temperature detection module 600 is electrically connected to the main control chip 400 and the battery port 301, respectively, for real-time monitoring of battery temperature and providing safety protection.

[0071] Specifically, the temperature detection module 600, as a crucial component for battery charging safety protection, is responsible for collecting battery temperature information in real time and feeding it back to the main control chip 400. The temperature detection module 600 can be implemented using various technologies, such as an NTC thermistor, a digital temperature sensor (e.g., DS18B20), a thermocouple sensor, or an integrated temperature detection chip. This module establishes electrical connections with the main control chip 400 and the battery port 301 via signal lines, accurately sensing temperature changes in the battery during charging and providing reliable data support for charging safety control.

[0072] The temperature detection module 600 continuously monitors the temperature of the battery connected to the battery port 301. When the battery is inserted into the battery port 301, the temperature detection module 600 starts working, collecting temperature data of the battery surface or interior in real time through its built-in temperature sensor. The collected temperature information is transmitted to the main control chip 400 in real time via a data interface. The main control chip 400 analyzes and processes the received temperature data to determine whether the battery temperature is within the safe charging range.

[0073] This utility model further proposes a multi-functional camera battery charging case, which includes the control circuit of the multi-functional battery charging case as described in the foregoing embodiments. The specific structure of the control circuit of this multi-functional battery charging case is as described in the above embodiments. Since this multi-functional camera battery charging case adopts all the technical solutions of all the above embodiments, it has at least all the technical effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0074] The multi-functional camera battery charging case features a compact shell design, integrating the aforementioned control circuitry, interface module 100, data reading module 200, power management module 300, interaction module 500, and temperature detection module 600. The shell also includes a USB-C port, memory card slot, battery compartment, and display / control interface, providing users with a complete charging and data transfer solution.

[0075] The battery compartment is specifically designed to accommodate mainstream camera battery models, such as the Canon LP-E6 series, Sony NP-FW50 series, and Nikon EN-EL15 series, achieving compatible charging of batteries from different brands through the standardized battery port 301. Additionally, the device features a dual card slot design, supporting simultaneous insertion and reading of TF and SD cards to meet photographers' needs for multi-card backup and rapid data transfer.

[0076] Furthermore, the USB-C interface can be dustproof, supports both data transfer and power input, and is consistent with the connection standards of modern devices.

[0077] In this way, photographers can use the charging case to charge the camera battery and back up memory card data simultaneously during outdoor shooting, improving work efficiency and reducing the burden of carrying equipment.

[0078] The above description is only a part or preferred embodiment of this utility model. Neither the text nor the drawings should limit the scope of protection of this utility model. All equivalent structural transformations made using the content of this utility model specification and drawings under the overall concept of this utility model, or direct / indirect applications in other related technical fields, are included within the scope of protection of this utility model.

Claims

1. A control circuit for a multi-functional battery charging box, characterized in that, include: An interface module, which is used for electrical connection to a user terminal; A data reading module is electrically connected to the interface module. The data reading module includes at least one card slot for inserting a memory card. The data reading module reads data from the memory card through the card slot and transmits it to the interface module. A power management module, the power management module including at least one battery port, the power management module being electrically connected to the interface module and the battery port, the power management module being used to turn on or off the electrical connection between the interface module and the battery port; The main control chip is electrically connected to the interface module, the power management module, and the data reading module. The main control chip is used to control at least one of the power management module and the data reading module to work.

2. The control circuit of the multifunctional battery charging box according to claim 1, characterized in that, The interface module is one or more of Micro USB and Type-C.

3. The control circuit of the multifunctional battery charging box according to claim 2, characterized in that, The data reading module includes: A data conversion chip, the data conversion chip including a first communication terminal, a second communication terminal and a detection terminal, wherein the first communication terminal and the detection terminal are respectively electrically connected to the card slot; A first analog switch, comprising a first control terminal, a first transmission terminal, and a second transmission terminal, wherein the first control terminal is electrically connected to the main control chip, the first transmission terminal is electrically connected to the data conversion chip, and the second transmission terminal is electrically connected to the interface module; The second analog switch includes a second control terminal, a third transmission terminal, and a fourth transmission terminal. The second control terminal is electrically connected to the main control chip, the third transmission terminal is electrically connected to the data conversion chip, and the fourth transmission terminal is electrically connected to the interface module.

4. The control circuit of the multifunctional battery charging box according to claim 3, characterized in that, The second analog switch also includes two DP / DM ports, one of which is electrically connected to the interface module, and the other of which is electrically connected to the main control chip.

5. The control circuit of the multifunctional battery charging box according to claim 3, characterized in that, The first analog switch is a USB 3.0 analog switch, and the second analog switch is a USB 2.0 analog switch.

6. The control circuit of the multifunctional battery charging box according to claim 3, characterized in that, The data reading module also includes: The power processing chip includes a first input terminal and a first output terminal, wherein the first output terminal is electrically connected to the data conversion chip; A first switching transistor, one of its conducting terminals is electrically connected to the interface module, and the other conducting terminal is electrically connected to the first input terminal; The second switch has one conducting terminal electrically connected to the interface module and the other conducting terminal electrically connected to the first output terminal.

7. The control circuit of the multifunctional battery charging box according to claim 1, characterized in that, The power management module includes: A battery charging management unit includes a second input terminal, a first connection terminal, and a second output terminal. The second input terminal is electrically connected to the interface module, the first connection terminal is electrically connected to the main control chip, and the second output terminal is electrically connected to the battery port. A power management unit, comprising a third input terminal and a third output terminal, wherein the third input terminal is electrically connected to the interface module and the third output terminal is electrically connected to the main control chip; The power management unit operates when the interface module is connected to the user terminal, and simultaneously activates the main control chip by outputting a level signal through the third output terminal.

8. The control circuit of the multifunctional battery charging box according to claim 1, characterized in that, It also includes an interaction module, which is electrically connected to the main control chip.

9. The control circuit of the multifunctional battery charging box according to claim 1, characterized in that, It also includes a temperature detection module, which is electrically connected to the main control chip and the battery port respectively. The temperature detection module is used to collect battery temperature information and feed it back to the main control chip.

10. A multi-functional camera battery charging case, characterized in that, The control circuit of the multi-functional battery charging box as described in any one of claims 1 to 9 is included.

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