Battery charging device and circuit structure thereof

Abstract

The utility model relates to the technical field of circuits, in particular to a battery charging device and a circuit structure thereof. The circuit structure of the battery charging device comprises a main control circuit board, a functional circuit board, a charging management circuit module, a card reading circuit module and a transmission module, the charging management circuit module is used for charging an external battery and arranged on the main control circuit board, the charging management circuit module is connected with the transmission module, and the card reading circuit module is connected with the main control circuit board. Electric energy transmission with an external power supply end is carried out through the transmission module; the card reading circuit module is used for communicating with an external memory card, the card reading circuit module and the transmission module are both arranged on the functional circuit board, and the card reading circuit module is connected with the transmission module and performs data transmission with an external terminal through the transmission module. The data transmission part and the charging part can be separated to a certain extent, the data transmission distance is shortened, the interference of the charging part on the data transmission part is reduced, and the stability of data transmission is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuits, in particular to a battery charging device and a circuit structure thereof. Background Art

[0002] Batteries, as a power source, can provide operating voltage for most electronic products to ensure their normal operation. For example, camera batteries can provide operating voltage for cameras. Most batteries are rechargeable and can be charged using a battery charger.

[0003] Some battery charging devices include a charging management circuit for charging the battery and a card reader that communicates with a memory card, reading and writing data to the card. However, data transmission in these battery charging devices is easily disrupted by charging, resulting in unstable data transmission. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a battery charging device and its circuit structure to solve the problem in the circuit structure of the battery charging device in the prior art that data transmission is easily interfered by charging and data transmission is unstable.

[0005] The utility model discloses a circuit structure of a battery charging device, including a main control circuit board, a functional circuit board, a charging management circuit module, a card reading circuit module and a transmission module, wherein:

[0006] The charging management circuit module is used to charge the external battery. The charging management circuit module is arranged on the main control circuit board. The charging management circuit module is connected to the transmission module and transmits power to the external power supply end through the transmission module.

[0007] The card reading circuit module is used to communicate with the external memory card. The card reading circuit module and the transmission module are both arranged on the functional circuit board. The card reading circuit module is connected to the transmission module and transmits data to the external terminal through the transmission module.

[0008] Optionally, the card reading circuit module is arranged close to the transmission module.

[0009] Optionally, the card reading circuit module includes a card socket, a card reading chip and a flash memory storage chip. The card socket is used to place an external memory card, and the card socket is provided with a first communication pin that can communicate with the external memory card. The card reading chip is provided with a second communication pin, and the second communication pin is connected to the first communication pin. The flash memory storage chip is connected to the card reading chip, and the card reading chip is connected to the transmission module.

[0010] Optionally, the card reading circuit module further includes a first electromagnetic filtering unit, and the first electromagnetic filtering unit is arranged between the first communication pin and the second communication pin.

[0011] Optionally, there are multiple first communication pins, and there are multiple second communication pins, and the multiple second communication pins are arranged in a one-to-one correspondence with the multiple first communication pins. The first electromagnetic filtering unit includes multiple first resistors, and the multiple first resistors are arranged in a one-to-one correspondence with the multiple first communication pins. One end of the first resistor is connected to the first communication pin, and the other end is connected to the second communication pin.

[0012] Optionally, the card reader chip is provided with a first clock signal pin, the flash memory storage chip is provided with a second clock signal pin, and the card reader circuit module further includes a second electromagnetic filtering unit, which is provided between the first clock signal pin and the second clock signal pin.

[0013] Optionally, the second electromagnetic filtering unit includes a filter capacitor and a second resistor, the filter capacitor is connected in series with the second resistor, the series node between the filter capacitor and the second resistor is connected to the second clock signal pin, the other end of the filter capacitor is grounded, and the other end of the second resistor is connected to the first clock signal pin.

[0014] Optionally, the transmission module includes a type-C interface and an interface control chip connected to the type-C interface, the type-C interface and the interface control chip are both connected to the charging management circuit module, and the interface control chip is connected to the card reading circuit module.

[0015] Optionally, the circuit structure also includes a step-down circuit module provided on the functional circuit board, the step-down circuit module is connected to the type-C interface, the interface control chip and the card reading circuit module, the step-down circuit module obtains electrical energy through the type-C interface, and is used to convert the obtained electrical energy into a supply voltage to power the interface control chip and the card reading circuit module.

[0016] The utility model also discloses a battery charging device, comprising a housing and the circuit structure of the battery charging device as described above, wherein the circuit structure is arranged in the housing.

[0017] Compared with the prior art, the battery charging device and its circuit structure provided by the embodiment of the present invention have the following beneficial effects: the circuit structure of the battery charging device of the embodiment of the present invention is achieved by setting a main control circuit board, a functional circuit board, a charging management circuit module, a card reading circuit module and a transmission module. The charging management circuit module is set on the main control circuit board, and the card reading circuit module and the transmission module are both set on the functional circuit board. The card reading circuit module and the transmission module for realizing data transmission and the charging management circuit module for realizing charging are separated on two circuit boards, and the card reading circuit module and the transmission module are set on the same circuit board, which separates the data transmission part and the charging part to a certain extent, shortens the data transmission distance, reduces the interference of the charging part on the data transmission part, and improves the stability of data transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0019] Figure 1 This is a schematic diagram of the circuit structure of the battery charging device provided by an embodiment of the present utility model;

[0020] Figure 2 This is one of the structural block diagrams of the circuit structure of the battery charging device provided by the embodiment of the utility model;

[0021] Figure 3 yes Figure 2 A detailed structural block diagram of the circuit structure of the battery charging device shown;

[0022] Figure 4 This is the second structural block diagram of the circuit structure of the battery charging device provided by the embodiment of the present utility model;

[0023] Figure 5 This is a partial circuit diagram of the card reader chip and the second electromagnetic filtering unit provided by an embodiment of the present utility model;

[0024] Figure 6 This is a partial circuit diagram of the card holder provided by an embodiment of the utility model;

[0025] Figure 7 This is a partial circuit diagram of a flash memory storage chip provided by an embodiment of the present utility model;

[0026] Figure 8 This is a partial circuit diagram of the first electromagnetic filtering unit provided by an embodiment of the present utility model;

[0027] Figure 9 This is a partial circuit diagram of the interface control chip provided by an embodiment of the present utility model;

[0028] Figure 10This is a partial circuit diagram of the Type-C interface provided by an embodiment of the present utility model;

[0029] Figure 11 This is a partial circuit diagram of a step-down circuit module provided by an embodiment of the present utility model;

[0030] Figure 12 It is a structural schematic diagram of a battery charging device provided by an embodiment of the utility model.

[0031] The reference numerals in the figures are:

[0032] 100. Circuit structure;

[0033] 110, main control circuit board; 120, functional circuit board; 130, charging management circuit module; 140, card reading circuit module; 141, first electromagnetic filtering unit; 142, second electromagnetic filtering unit; 150, transmission module; 160, step-down circuit module;

[0034] J1, card socket; J2, type-C interface; U1, card reader chip; U2, flash memory storage chip; U3, interface control chip; U4, step-down chip; L1, first energy storage inductor; D1, first diode; R1, first resistor; R2, second resistor; C1, filter capacitor; C2, energy storage capacitor;

[0035] 200. Battery charging device;

[0036] 210. Shell. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. Now, in conjunction with the accompanying drawings, a detailed description of the preferred embodiments of the present utility model will be given.

[0038] The present invention provides a circuit structure 100 of a battery charging device 200, such as Figure 1 and Figure 2 As shown, the circuit structure 100 of the battery charging device 200 includes a main control circuit board 110, a functional circuit board 120, a charging management circuit module 130, a card reading circuit module 140 and a transmission module 150.

[0039] The charging management circuit module 130 is used to charge the external battery. The charging management circuit module 130 is arranged on the main control circuit board 110. The charging management circuit module 130 is connected to the transmission module 150 and transmits power to the external power supply end through the transmission module 150.

[0040] The card reading circuit module 140 is used to communicate with an external memory card. The card reading circuit module 140 and the transmission module 150 are both arranged on the functional circuit board 120. The card reading circuit module 140 is connected to the transmission module 150 and transmits data with the external terminal through the transmission module 150.

[0041] The circuit structure 100 of the battery charging device 200 of the embodiment of the present invention is provided with a main control circuit board 110, a functional circuit board 120, a charging management circuit module 130, a card reading circuit module 140 and a transmission module 150. The charging management circuit module 130 is provided on the main control circuit board 110, and the card reading circuit module 140 and the transmission module 150 are both provided on the functional circuit board 120. The card reading circuit module 140 and the transmission module 150 for realizing data transmission are separated from the charging management circuit module 130 for realizing charging on two circuit boards. The card reading circuit module 140 and the transmission module 150 are provided on the same circuit board, which separates the data transmission part and the charging part to a certain extent, shortens the data transmission distance, reduces the interference of the charging part on the data transmission part, and improves the stability of data transmission.

[0042] Among them, the card reading circuit module 140 and the transmission module 150 are arranged on the same circuit board, shortening the transmission line of the high-frequency communication signal as much as possible, reducing the antenna effect caused by the line, and they share the same ground line, reducing the length of the ground return path, reducing the inductance and impedance of the ground return path, reducing the interference caused by the ground return path to signal transmission, and reducing the EMI (Electromagnetic Interference) of the overall circuit structure 100.

[0043] In an optional embodiment of the present application, the card reading circuit module 140 is arranged close to the transmission module 150, which can further reduce the distance between the card reading circuit module 140 and the transmission module 150. The smaller the distance between the card reading circuit module 140 and the transmission module 150, the less antenna effect caused by the long traces on the functional circuit board 120 can be reduced, and the possibility of the digital signal being radiated through the antenna formed by the traces can be reduced, thereby reducing the electromagnetic interference of the battery charging device 200.

[0044] In an optional embodiment of the present application, reference Figure 3 、 Figures 5 to 7 The card reading circuit module 140 includes a card socket J1, a card reading chip U1 and a flash memory storage chip U2. The card socket J1 is used to place an external memory card, and the card socket J1 is provided with a first communication pin that can communicate with the external memory card. The card reading chip U1 is provided with a second communication pin, and the second communication pin is connected to the first communication pin. The flash memory storage chip U2 is connected to the card reading chip U1, and the card reading chip U1 is connected to the transmission module 150.

[0045] Card holder J1 is configured to accommodate an external memory card. Once placed in card holder J1, the external memory card can be connected to the first communication pin of card holder J1. Card reader chip U1 reads data from the external memory card via the first and second communication pins. Card reader chip U1 is responsible for communicating with the inserted memory card and with external terminals via transmission module 150, performing read and write operations on the memory card and transmitting data. Flash memory chip U2 is typically used to store software programs, drivers, or other data required by card reader circuit module 140 itself. This data can include firmware, configuration files, drivers, and the like for card reader circuit module 140.

[0046] In a specific implementation, the card reader chip U1 can use chips of models such as GL3220, GL3233, etc. to read the data of the memory card. Preferably, the card reader chip U1 uses a chip of model GL3224, and the flash memory storage chip U2 can use a chip of model GD25Q512.

[0047] When an external memory card is placed in the card holder J1 and the circuit structure 100 of the battery charging device 200 is powered on, the card reader chip U1 communicates with the external memory card through the second communication pin and the first communication pin to perform data transmission, and then performs data transmission with the external terminal through the transmission module 150.

[0048] Further integration Figure 8 The card reading circuit module 140 may further include a first electromagnetic filtering unit 141 , which is disposed between the first communication pin and the second communication pin.

[0049] By disposing the first electromagnetic filtering unit 141 between the first communication pin and the second communication pin, electromagnetic interference of the circuit structure 100 can be reduced.

[0050] Furthermore, there are multiple first communication pins, and multiple second communication pins are set, and the multiple second communication pins are set in a one-to-one correspondence with the multiple first communication pins. The first electromagnetic filtering unit 141 includes multiple first resistors R1, and the multiple first resistors R1 are set in a one-to-one correspondence with the multiple first communication pins. One end of the first resistor R1 is connected to a first communication pin, and the other end is connected to a second communication pin.

[0051] A first resistor R1 is provided between each first communication pin of the card reader chip U1 and the corresponding second communication pin of the card holder J1. By impedance matching, the reflection of the circuit is reduced, and the electromagnetic interference of the circuit structure 100 is reduced. The structure is simple. The second communication pin of the card reader chip U1 can be referred to Figure 5 and Figure 9The pins SD_D0~SD_D3, SD_CM and SD_CK shown in the figure, the first communication pin of the card holder J1 can be referred to Figure 5 、 Figure 6 and Figure 9 The pins SDD0 to SDD3 , SDCM and SDCK correspond to the pins SD_D0 to SD_D3 , SD_CM and SD_CK.

[0052] refer to Figure 3 、 Figure 5 as well as Figure 7 In an optional embodiment of the present application, the card reader chip U1 is provided with a first clock signal pin, the flash memory storage chip U2 is provided with a second clock signal pin, and the card reader circuit module 140 also includes a second electromagnetic filtering unit 142, which is provided between the first clock signal pin and the second clock signal pin.

[0053] By setting a second electromagnetic filtering unit 142 between the corresponding clock signal pins of the card reader chip U1 and the flash memory storage chip U2, that is, setting a second electromagnetic filtering unit 142 on the clock signal transmission path between the card reader chip U1 and the flash memory storage chip U2, the electromagnetic interference of the circuit structure 100 can be reduced.

[0054] Specifically, refer to Figure 3 、 Figure 5 as well as Figure 7 The second electromagnetic filtering unit 142 includes a filter capacitor C1 and a second resistor R2. The filter capacitor C1 is connected in series with the second resistor R2. The series node between the filter capacitor C1 and the second resistor R2 is connected to the second clock signal pin and the third clock signal pin. The other end of the filter capacitor C1 is grounded, and the other end of the second resistor R2 is connected to the first clock signal pin.

[0055] A resistor and a filter capacitor C1 are configured on the clock signal transmission path between the card reader chip U1 and the flash memory storage chip U2 to help smooth the rising and falling edges of the signal, reduce the generation of high-order harmonics, and thus reduce electromagnetic interference of the circuit structure 100.

[0056] Among them, the first clock signal pin of the card reader chip U1 can refer to Figure 5 The SPI_CK pin shown, the second clock signal pin of the flash memory chip U2 can refer to Figure 7 The SCK pin is shown.

[0057] refer to Figure 3 、 Figure 9 and Figure 10In an optional embodiment, the transmission module 150 includes a type-C interface J2 and an interface control chip U3 connected to the type-C interface J2, the type-C interface J2 and the interface control chip U3 are both connected to the charging management circuit module 130, and the interface control chip U3 is connected to the card reading circuit module 140.

[0058] By adopting the type-C interface J2 as the interface for power and data transmission, it can be plugged in and out in both directions without having to worry about the insertion direction of the interface, thereby improving user convenience; it can achieve fast data transmission, which is conducive to quickly reading memory card data and transmitting it to an external terminal; and the type-C interface J2 is adopted by more and more devices. Adopting the type-C interface J2 can increase the compatibility of the battery charging device 200.

[0059] Among them, the card reading circuit module 140 can communicate with the external memory card, perform read and write operations on the external memory card, and communicate with the external terminal through the type-C interface J2 to obtain data from the external terminal or transmit data read from the external memory card to the external terminal. The charging management circuit module 130 controls the interface control chip U3 to obtain power through the type-c interface and subsequently charge the external battery. The interface control chip U3 is used to assist in identifying the forward and reverse insertion of the type-C interface J2 and the integrated output of the signal to realize the transmission of power and data. It can be implemented using existing chips, such as VL160, VL161 and other chips.

[0060] In other embodiments, the transmission module 150 may also use a Lightning interface and a corresponding control chip to achieve power and data transmission. The transmission module 150 preferably uses a type-C interface J2 and an interface control chip U3 connected to the type-C interface J2. It has strong versatility and can be connected to a terminal or power supply with an interface that matches the type-C interface J2.

[0061] Further, refer to Figure 2 The circuit structure 100 also includes a step-down circuit module 160 provided on the functional circuit board 120. The step-down circuit module 160 is connected to the type-C interface J2, the interface control chip U3 and the card reading circuit module 140. The step-down circuit module 160 obtains electrical energy through the type-C interface J2 and is used to convert the obtained electrical energy into a supply voltage to power the interface control chip U3 and the card reading circuit module 140.

[0062] By setting a step-down circuit module 160 on the functional circuit board 120, the step-down circuit module 160 can obtain electrical energy through the type-C interface J2, and provide a stable voltage for the operation of the interface control chip U3 and the card reading circuit module 140 separately, thereby ensuring the normal operation of the interface control chip U3 and the card reading circuit module 140.

[0063] Specifically, refer to Figure 5 、 Figure 9 and Figure 11 The step-down circuit module 160 includes a step-down chip U4, a first energy storage inductor L1, a first diode D1 and an energy storage filter capacitor C2. The input pin of the step-down chip U4 is connected to the type-C interface J2, and the output pin is connected to one end of the first energy storage inductor L1 and the cathode of the first diode D1. The other end of the first energy storage inductor L1 is connected to the card reading circuit module 140, the power input end of the interface control chip U3 and the positive electrode of the energy storage filter capacitor C2. The positive electrode of the first diode D1 is grounded, and the negative electrode of the energy storage filter capacitor C2 is grounded.

[0064] By setting a step-down chip U4, a first energy storage inductor L1, a first diode D1, and an energy storage filter capacitor C2 as a step-down circuit module 160, the step-down chip U4 can obtain electrical energy through the type-C interface J2, and combine the first energy storage inductor L1, the energy storage filter capacitor C2 and the first freewheeling diode D1 to achieve voltage reduction, thereby providing a stable power supply for the interface control chip U3 and the card reading circuit module 140. The step-down chip U4 has a high circuit integration, which can reduce the number of circuit components and the space occupied by the circuit, which is conducive to the miniaturization of the circuit structure 100 of the battery charging device 200.

[0065] The other end of the first energy storage inductor L1 is specifically connected to the power input end of the card reading chip U1 of the card reading circuit module 140 , and the step-down circuit module 160 supplies power to the card reading chip U1 .

[0066] The present invention also provides a battery charging device 200. Figure 1 and Figure 12 The battery charging device 200 includes a housing 210 and the circuit structure 100 of the battery charging device 200 as described above. The circuit structure 100 is disposed in the housing 210 .

[0067] The circuit structure 100 in the battery charging device 200 of the present application is provided with a main control circuit board 110, a functional circuit board 120, a charging management circuit module 130, a card reading circuit module 140 and a transmission module 150. The charging management circuit module 130 is provided on the main control circuit board 110, and the card reading circuit module 140 and the transmission module 150 are both provided on the functional circuit board 120. The card reading circuit module 140 and the transmission module 150 for realizing data transmission are separated from the charging management circuit module 130 for realizing charging on two circuit boards. The card reading circuit module 140 and the transmission module 150 are provided on the same circuit board, which separates the data transmission part and the charging part to a certain extent, shortens the data transmission distance, reduces the interference of the charging part on the data transmission part, and improves the stability of data transmission.

[0068] The battery charging device 200 of the present application can be specifically applied to a scenario of charging a camera battery. The battery charging device 200 can charge a camera battery and also read a memory card of the camera.

[0069] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Those skilled in the art may modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A circuit structure of a battery charging device, characterized in that: It includes a main control circuit board, a functional circuit board, a charging management circuit module, a card reading circuit module and a transmission module, wherein: The charging management circuit module is used to charge the external battery. The charging management circuit module is arranged on the main control circuit board. The charging management circuit module is connected to the transmission module and transmits power to the external power supply end through the transmission module. The card reading circuit module is used to communicate with an external memory card. The card reading circuit module and the transmission module are both arranged on the functional circuit board. The card reading circuit module is connected to the transmission module and performs data transmission with an external terminal through the transmission module.

2. The circuit structure according to claim 1, wherein: The card reading circuit module is arranged close to the transmission module.

3. The circuit structure according to claim 2, wherein: The card reading circuit module includes a card socket, a card reading chip and a flash memory storage chip. The card socket is used to place an external memory card, and the card socket is provided with a first communication pin that can communicate with the external memory card. The card reading chip is provided with a second communication pin, and the second communication pin is connected to the first communication pin. The flash memory storage chip is connected to the card reading chip, and the card reading chip is connected to the transmission module.

4. The circuit structure according to claim 3, wherein: The card reading circuit module further includes a first electromagnetic filtering unit, which is arranged between the first communication pin and the second communication pin.

5. The circuit structure according to claim 4, characterized in that: There are multiple first communication pins, and there are multiple second communication pins. The multiple second communication pins are arranged in a one-to-one correspondence with the multiple first communication pins. The first electromagnetic filtering unit includes multiple first resistors. The multiple first resistors are arranged in a one-to-one correspondence with the multiple first communication pins. One end of the first resistor is connected to the first communication pin, and the other end is connected to the second communication pin.

6. The circuit structure according to claim 3, characterized in that: The card reader chip is provided with a first clock signal pin, the flash memory storage chip is provided with a second clock signal pin, and the card reader circuit module further includes a second electromagnetic filtering unit, which is provided between the first clock signal pin and the second clock signal pin.

7. The circuit structure according to claim 6, characterized in that: The second electromagnetic filtering unit includes a filter capacitor and a second resistor, the filter capacitor is connected in series with the second resistor, the series node between the filter capacitor and the second resistor is connected to the second clock signal pin, the other end of the filter capacitor is grounded, and the other end of the second resistor is connected to the first clock signal pin.

8. The circuit structure according to any one of claims 1 to 7, characterized in that: The transmission module includes a type-C interface and an interface control chip connected to the type-C interface. The type-C interface and the interface control chip are both connected to the charging management circuit module, and the interface control chip is connected to the card reading circuit module.

9. The circuit structure according to claim 8, characterized in that: The circuit structure also includes a step-down circuit module provided on the functional circuit board, which is connected to the type-C interface, the interface control chip and the card reader circuit module. The step-down circuit module obtains electrical energy through the type-C interface and is used to convert the obtained electrical energy into a supply voltage to power the interface control chip and the card reader circuit module.

10. A battery charging device, characterized in that: The invention comprises a housing and a circuit structure of the battery charging device according to any one of claims 1 to 9, wherein the circuit structure is arranged in the housing.

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