Battery load charging and discharging circuit

Abstract

The utility model discloses a battery load charging and discharging circuit, comprising a charging and discharging module which comprises a plurality of groups of charging management circuits, a plurality of groups of battery protection circuits, a plurality of groups of discharging circuits and a battery access end; the corresponding ends of the multiple battery protection circuits are electrically connected with the corresponding ends of the multiple charging management circuits and the corresponding ends of the multiple discharging circuits respectively. One end of the battery access end is electrically connected with the charging management circuit and the discharging circuit, and the other end of the battery access end is used for being externally connected with a battery; and each group of discharge circuits comprises a plurality of different discharge current gears, and different discharge currents can be switched and selected. According to the utility model, accurate discharging can be carried out, through the design of multiple groups of discharging circuits, various discharging current options from 4 mA to 300 mA are realized, a user can select appropriate discharging current according to test requirements, and battery performance of the earphone in different use scenes can be accurately simulated.

Description

Technical Field

[0001] This utility model relates to the field of headphone charging and discharging technology, and in particular to a battery load charging and discharging circuit. Background Technology

[0002] Bluetooth earbuds, including a charging case and two built-in earbuds, require charge-discharge tests on their batteries during power testing, along with the compilation of charge-discharge curves and other test data. To test battery performance at different charge levels, such as 100%, 50%, and 10%, multiple sets of batteries are needed to simulate different scenarios. Traditionally, battery charging is done through the charging case, while discharging is achieved by connecting the earbuds to a device to play music. However, existing charging and discharging devices have limitations, such as slow charging speeds, low efficiency, or the ability to use only one or two batteries at a time, which restricts the ability to quickly test batteries. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a battery load charging and discharging circuit.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] This utility model provides a battery load charging and discharging circuit, including: a charging and discharging module, wherein the charging and discharging module includes multiple sets of charging management circuits, multiple sets of battery protection circuits, multiple sets of discharging circuits, and a battery access terminal;

[0006] The corresponding terminals of the multiple sets of battery protection circuits are electrically connected to the corresponding terminals of the multiple sets of charging management circuits and the multiple sets of discharging circuits, respectively.

[0007] One end of the battery access terminal is electrically connected to the charging management circuit and the discharging circuit respectively, and the other end is used to connect an external battery;

[0008] Each set of discharge circuits includes multiple different discharge current levels, allowing for switching between different discharge currents.

[0009] Preferably, the battery load charging and discharging circuit further includes a PCBA board, and the charging and discharging module is disposed on the PCBA board.

[0010] Preferably, the PCBA board is further provided with a USB interface circuit; the corresponding end of the USB interface circuit is electrically connected to the corresponding ends of multiple sets of charging management circuits.

[0011] Preferably, each set of the charging management circuits includes two different charging current levels, which can be switched to select different charging currents.

[0012] Preferably, the multiple sets of charging current levels include charging currents of 60mA and 120mA.

[0013] Preferably, the multiple sets of discharge current levels include discharge currents of 4mA, 10mA, 20mA, 30mA, 50mA, 70mA, 100mA, 200mA, and 300mA.

[0014] Preferably, each of the discharge circuits includes a first jumper switch and a first resistor connected in series, a second jumper switch and a second resistor connected in series, a third jumper switch and a third resistor connected in series, a fourth jumper switch and a fourth resistor connected in series, a fifth jumper switch and a fifth resistor connected in series, a sixth jumper switch and a sixth resistor connected in series, a seventh jumper switch and a seventh resistor connected in series, an eighth jumper switch and an eighth resistor connected in series, a ninth jumper switch and a ninth resistor connected in series, and a first diode and a tenth resistor connected in series.

[0015] The first jumper switch and the first resistor, the second jumper switch and the second resistor, the third jumper switch and the third resistor, the fourth jumper switch and the fourth resistor, the fifth jumper switch and the fifth resistor, the sixth jumper switch and the sixth resistor, the seventh jumper switch and the seventh resistor, the eighth jumper switch and the eighth resistor, the ninth jumper switch and the ninth resistor, the first diode and the tenth resistor are connected in parallel.

[0016] Preferably, the first jumper switch and the first resistor are each set to a discharge current of 300mA; the second jumper switch and the second resistor are each set to a discharge current of 200mA; the third jumper switch and the third resistor are each set to a discharge current of 100mA; the fourth jumper switch and the fourth resistor are each set to a discharge current of 70mA; the fifth jumper switch and the fifth resistor are each set to a discharge current of 50mA; the sixth jumper switch and the sixth resistor are each set to a discharge current of 30mA; the seventh jumper switch and the seventh resistor are each set to a discharge current of 20mA; the eighth jumper switch and the eighth resistor are each set to a discharge current of 10mA; and the ninth jumper switch and the ninth resistor are each set to a discharge current of 4mA.

[0017] Preferably, each of the charging management circuits includes a charging management chip and its peripheral circuits, and the charging management chip is model HP4059D6;

[0018] Each of the battery protection circuits includes a battery protection chip and its peripheral circuits. The battery protection chip is model XB6040.

[0019] Preferably, the number of the multiple sets of charging management circuits, multiple sets of battery protection circuits, and multiple sets of discharge circuits are all equal, and each is set to 6 sets.

[0020] The technical solution of this utility model has the following beneficial effects:

[0021] This invention enables precise discharge: through the design of multiple discharge circuits, it achieves a variety of discharge current options from 4mA to 300mA, allowing users to select the appropriate discharge current according to their testing needs and accurately simulate the battery performance of headphones under different usage scenarios.

[0022] Multi-scenario simulation: Through the design of multiple discharge circuits, the working state of the headphone battery at different charge levels can be simulated, such as 100%, 50%, 10%, etc., providing comprehensive data support for battery performance testing.

[0023] Simultaneous testing of multiple batteries: Six sets of charging management circuits, battery protection circuits, and discharge circuits are designed to charge or discharge six earphone batteries simultaneously, greatly improving testing efficiency and making it suitable for batch testing of TWS earphones.

[0024] Fast charging and discharging: It adopts a high-efficiency charging management chip, such as the Hypower HP4059D6, which supports a maximum charging current of 300mA to achieve fast charging and improve charging efficiency.

[0025] Battery protection: Integrated battery protection circuitry, such as the XB6040 chip, provides overvoltage, overcurrent, and short-circuit protection, ensuring battery safety during charging and discharging and extending battery life.

[0026] Small footprint: Due to the use of a 1*1 packaged charging management chip and battery protection chip, the space occupied is small, making the entire charging and discharging module more compact and easier to integrate into smaller devices. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the control system of this utility model;

[0028] Figures 2a-2f This is a circuit diagram of the 6-group charging management circuit 100 of this utility model;

[0029] Figures 3a-3f This is a circuit diagram of the 6-group battery protection circuit 200 of this utility model;

[0030] Figures 4a-4f This utility model comprises 6 sets of discharge circuits 300;

[0031] Figure 5 This is a circuit diagram of the USB interface circuit of this utility model. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] Reference Figures 1 to 5This utility model provides a battery load charging and discharging circuit, including: a charging and discharging module.

[0038] The charging and discharging module includes multiple sets of charging management circuits 100, multiple sets of battery protection circuits 200, multiple sets of discharging circuits 300, and a battery input terminal.

[0039] Multiple charging management circuits 100, through a charging management IC (such as HP4059D6), enable stable charging of the battery, with a maximum charging current of up to 300mA, ensuring charging efficiency and safety.

[0040] The corresponding terminals of the multiple battery protection circuits 200 are electrically connected to the corresponding terminals of the multiple charging management circuits 100 and the multiple discharging circuits 300, respectively; one end of the battery input terminal is electrically connected to the charging management circuit 100 and the discharging circuit 300, respectively, and the other end is used for connecting an external battery; the battery protection circuits 200, through a battery protection IC (such as XB6040), realize overvoltage, overcurrent and short circuit protection to prevent the battery from being damaged during charging and discharging and extend the battery life;

[0041] Each discharge circuit 300 includes multiple different discharge current levels, allowing users to switch between different discharge currents. Each discharge circuit 300 allows users to select different discharge currents to simulate different usage scenarios. Effect: By switching different resistors via jumper switches, multiple discharge current options from 4mA to 300mA can be achieved to meet different testing requirements, while protecting the battery from over-discharge.

[0042] Each set of discharge circuits 300 can be connected to one earphone battery, thus allowing multiple pairs of earphones to be discharged simultaneously.

[0043] Furthermore, the battery load charging and discharging circuit also includes a PCBA board, on which the charging and discharging module is mounted; the PCBA board also has a USB interface circuit 400; the corresponding terminals of the USB interface circuit 400 are electrically connected to the corresponding terminals of multiple charging management circuits; through the USB interface, power can be conveniently supplied from an external power source (to power the entire module, simplifying power management).

[0044] Each charging management circuit includes two different charging current levels, allowing users to switch between different charging currents. These charging current levels include 60mA and 120mA. Furthermore, multiple discharge current levels are provided, including 4mA, 10mA, 20mA, 30mA, 50mA, 70mA, 100mA, 200mA, and 300mA, selectable via jumper switches. The maximum discharge current limit is 300mA. In this embodiment, the discharge current 300 provides multiple discharge current options to meet the testing requirements of different headphone batteries. Users can select the appropriate discharge current based on the headphone battery capacity and testing requirements, thereby achieving accurate battery performance evaluation. Setting the maximum discharge current limit protects the battery from overcurrent, ensuring that the battery is not damaged by excessive current during testing and extending its lifespan.

[0045] Furthermore, refer to Figures 4a to 4f Each discharge circuit 300 includes a first jumper switch and a first resistor connected in series, a second jumper switch and a second resistor connected in series, a third jumper switch and a third resistor connected in series, a fourth jumper switch and a fourth resistor connected in series, a fifth jumper switch and a fifth resistor connected in series, a sixth jumper switch and a sixth resistor connected in series, a seventh jumper switch and a seventh resistor connected in series, an eighth jumper switch and an eighth resistor connected in series, a ninth jumper switch and a ninth resistor connected in series, and a first diode and a tenth resistor connected in series; the first jumper switch and the first resistor, the second jumper switch and the second resistor, the third jumper switch and the third resistor, the fourth jumper switch and the fourth resistor, the fifth jumper switch and the fifth resistor, the sixth jumper switch and the sixth resistor, the seventh jumper switch and the seventh resistor, the eighth jumper switch and the eighth resistor, the ninth jumper switch and the ninth resistor, and the first diode and the tenth resistor are connected in parallel;

[0046] The first jumper switch and the first resistor are each set to a discharge current of 300mA; the second jumper switch and the second resistor are each set to a discharge current of 200mA; the third jumper switch and the third resistor are each set to a discharge current of 100mA; the fourth jumper switch and the fourth resistor are each set to a discharge current of 70mA; the fifth jumper switch and the fifth resistor are each set to a discharge current of 50mA; the sixth jumper switch and the sixth resistor are each set to a discharge current of 30mA; the seventh jumper switch and the seventh resistor are each set to a discharge current of 20mA; the eighth jumper switch and the eighth resistor are each set to a discharge current of 10mA; the ninth jumper switch and the first resistor are each set to a discharge current of 10mA; the ninth jumper switch and the first resistor are each set to a discharge current of 10mA. Nine resistors correspond to a 4mA discharge current setting; the blue indicator light stays on during discharge and turns off after discharge is complete. The minimum discharge voltage is 2.8V. After reaching 2.8V, discharge will stop. The protection IC in the circuit protects the battery. The discharge time can be calculated based on the actual battery capacity. Normally, it is discharged at 1C of the battery capacity. TWS earphone batteries usually take 1 hour to discharge completely, while charging cases take 2-3 hours. If you want to discharge all the power, after reaching the protection voltage of 2.8V, plug the jumper switch into the ground terminal and select 4mA or 10mA to continue discharging with a small current until the battery is completely discharged.

[0047] Furthermore, each charging management circuit 100 includes a charging management chip and its peripheral circuits, and the charging management chip is model HP4059D6; the charging management chip is HP4059D6 of the Hypower brand, which can charge a maximum current of 300mA, has output protection function, 1*1 package, occupies a small space, and has low power consumption.

[0048] Furthermore, each battery protection circuit 200 includes a battery protection chip and its peripheral circuits. The battery protection chip is model XB6040. The battery protection chip is Xysemi brand XB6040, 1*1 package, with overvoltage and current protection function, maximum discharge current of 400mA, short circuit protection function, discharge cut-off voltage of 2.8V, and enters ultra-low power consumption of 0.1uA after protection, which can protect the battery.

[0049] Furthermore, the number of multiple charging management circuits 100, multiple battery protection circuits 200, and multiple discharge circuits 300 are all equal, and each is set to 6 groups; the discharge circuit 300 can connect to 6 earphone batteries at the same time, so it can discharge 3 pairs of TWS earphones at the same time. Correspondingly, the charging management circuit can charge 6 earphone batteries at the same time, so it can charge 3 pairs of TWS earphones at the same time.

[0050] The charging management circuit 100 comprises six sets of charging management circuits, each capable of independently managing the charging of one earphone battery. It controls the charging current to ensure a safe and stable charging process. For example, when the earphone battery is low, the charging management circuit can provide a larger charging current for rapid charging; when the battery is nearing full charge, it automatically reduces the charging current to prevent overcharging. In this way, the six sets of charging management circuits can simultaneously charge six earphone batteries, meeting the charging needs of three pairs of TWS earphones (each pair has two batteries).

[0051] The battery protection circuit 200 also has six sets of battery protection circuits. The main function of the battery protection circuit 200 is to protect the safety of the headphone batteries during use; it can monitor parameters such as battery voltage and current; when the battery voltage is too high or too low, the battery protection circuit will cut off the circuit in time to prevent battery damage; for example, when the battery voltage drops below the set safety threshold during discharge, the battery protection circuit will stop discharging to avoid damage caused by over-discharge; these six sets of battery protection circuits correspond to the six headphone batteries, providing comprehensive protection for each battery.

[0052] The discharge circuit 300 also has 6 sets, each of which can be connected to one earphone battery to realize the battery discharge function. During the discharge process, the discharge circuit can control the discharge current, so that the earphone can output power stably when in use; moreover, since there are 6 sets of discharge circuits, 6 earphone batteries can be connected at the same time, that is, 3 pairs of TWS earphones can be discharged, allowing multiple pairs of earphones to be used normally at the same time.

[0053] Coordinated charging process: When all three pairs of TWS earbuds need charging, the two batteries in each pair are connected to the corresponding charging management circuit 100. The charging management circuit 100 automatically adjusts the charging parameters based on the current battery level. Simultaneously, the battery protection circuit 200 monitors the battery status in real time. If any abnormality is detected (such as excessively high battery temperature or abnormal charging current), it promptly notifies the charging management circuit 100, which then makes corresponding adjustments, such as pausing charging or reducing charging power, to ensure the safety of the charging process.

[0054] Coordinated Discharge Process: During discharge, the six headphone batteries power the headphones through the discharge circuit 300. The battery protection circuit 200 continuously monitors the battery's discharge status and promptly cuts off the discharge circuit when the battery power is insufficient or other abnormalities occur, preventing over-discharge. Simultaneously, the discharge circuit 300 rationally allocates the discharge current according to the actual usage needs of the headphones, ensuring that the headphone's sound quality and performance are not affected. Moreover, because multiple circuits are of equal quantity, the charging and discharging processes can be seamlessly switched. After use, the headphones can be directly connected to the charging management circuit for charging, making the entire process efficient and coordinated.

[0055] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A battery load charging and discharging circuit, characterized in that, include: A charging and discharging module, comprising multiple sets of charging management circuits, multiple sets of battery protection circuits, multiple sets of discharging circuits, and a battery input terminal; The corresponding terminals of the multiple sets of battery protection circuits are electrically connected to the corresponding terminals of the multiple sets of charging management circuits and the multiple sets of discharging circuits, respectively. One end of the battery access terminal is electrically connected to the charging management circuit and the discharging circuit respectively, and the other end is used to connect an external battery; Each set of discharge circuits includes multiple different discharge current levels, allowing for switching between different discharge currents.

2. The battery load charging and discharging circuit according to claim 1, characterized in that, The battery load charging and discharging circuit also includes a PCBA board, and the charging and discharging module is mounted on the PCBA board.

3. The battery load charging and discharging circuit according to claim 2, characterized in that, The PCBA board is also provided with a USB interface circuit; the corresponding end of the USB interface circuit is electrically connected to the corresponding ends of multiple sets of charging management circuits.

4. The battery load charging and discharging circuit according to claim 1, characterized in that, Each set of the charging management circuits includes two different charging current levels, which can be switched to select different charging currents.

5. The battery load charging and discharging circuit according to claim 4, characterized in that, The multiple charging current levels include 60mA and 120mA.

6. The battery load charging and discharging circuit according to claim 1, characterized in that, The multiple discharge current ranges include discharge currents of 4mA, 10mA, 20mA, 30mA, 50mA, 70mA, 100mA, 200mA, and 300mA.

7. The battery load charging and discharging circuit according to claim 5, characterized in that, Each set of discharge circuits includes a first jumper switch and a first resistor connected in series, a second jumper switch and a second resistor connected in series, a third jumper switch and a third resistor connected in series, a fourth jumper switch and a fourth resistor connected in series, a fifth jumper switch and a fifth resistor connected in series, a sixth jumper switch and a sixth resistor connected in series, a seventh jumper switch and a seventh resistor connected in series, an eighth jumper switch and an eighth resistor connected in series, a ninth jumper switch and a ninth resistor connected in series, and a first diode and a tenth resistor connected in series. The first jumper switch and the first resistor, the second jumper switch and the second resistor, the third jumper switch and the third resistor, the fourth jumper switch and the fourth resistor, the fifth jumper switch and the fifth resistor, the sixth jumper switch and the sixth resistor, the seventh jumper switch and the seventh resistor, the eighth jumper switch and the eighth resistor, the ninth jumper switch and the ninth resistor, the first diode and the tenth resistor are connected in parallel.

8. The battery load charging and discharging circuit according to claim 7, characterized in that, The first jumper switch and the first resistor are each set to a discharge current of 300mA; the second jumper switch and the second resistor are each set to a discharge current of 200mA; the third jumper switch and the third resistor are each set to a discharge current of 100mA; the fourth jumper switch and the fourth resistor are each set to a discharge current of 70mA; the fifth jumper switch and the fifth resistor are each set to a discharge current of 50mA; the sixth jumper switch and the sixth resistor are each set to a discharge current of 30mA; the seventh jumper switch and the seventh resistor are each set to a discharge current of 20mA; the eighth jumper switch and the eighth resistor are each set to a discharge current of 10mA; and the ninth jumper switch and the ninth resistor are each set to a discharge current of 4mA.

9. The battery load charging and discharging circuit according to claim 1, characterized in that, Each of the aforementioned charging management circuits includes a charging management chip and its peripheral circuits, and the model of the charging management chip is HP4059D6; Each of the battery protection circuits includes a battery protection chip and its peripheral circuits. The battery protection chip is model XB6040.

10. The battery load charging and discharging circuit according to claim 1, characterized in that, The number of the multiple sets of charging management circuits, multiple sets of battery protection circuits, and multiple sets of discharge circuits are all equal, and each set is set to 6 sets.

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