Lithium battery charging and discharging control circuit applied to heating table

Abstract

The utility model discloses a lithium battery charging and discharging control circuit applied to a heating table. The lithium battery charging and discharging control circuit comprises a charging circuit, a discharging circuit and a control switch, the charging circuit comprises a power access end, a first inductance element, a charging chip and a lithium battery port which are connected in sequence, the charging circuit further comprises a first resistor, a first diode element, a first capacitor and a second capacitor, the first resistor is connected with the first diode element and the charging chip, the first diode element is connected with the first inductance element, and the second diode element is connected with the second inductance element. The first capacitor is connected in parallel with the lithium battery port, and the second capacitor is connected in parallel with the first capacitor; the second capacitor is respectively connected with the charging chip and the control switch; the discharging circuit comprises a discharging chip, a switch element and a power output end which are connected in sequence. According to the utility model, the lithium battery is controlled to supply power through the control switch, so that the heating table can be lifted smoothly, and the convenience and flexibility of use are improved.

Description

Technical Field

[0001] This utility model relates to, but is not limited to, the field of lithium battery management technology, and in particular to a lithium battery charging and discharging control circuit for use in a heating table. Background Technology

[0002] Traditional heating table lifting mechanisms typically rely on an external power source, which limits their flexibility and convenience. This is especially true in scenarios without an external power supply or where frequent relocation is required, where the use of the lifting mechanism is significantly restricted. Summary of the Invention

[0003] In view of the above problems, this utility model proposes a lithium battery charging and discharging control circuit for a heating table, which can ensure smooth lifting and lowering of the heating table and improve the convenience and flexibility of use.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] This utility model proposes a lithium battery charging and discharging control circuit for use in a heating table, comprising: a charging circuit, a discharging circuit, and a control switch; the charging circuit includes a power input terminal, a first inductor, a charging chip, and a lithium battery port connected in sequence, and further includes a first resistor, a first diode, a first capacitor, and a second capacitor, wherein the first resistor is connected to the first diode and the charging chip respectively, the first diode is connected to the first inductor, the first capacitor is connected in parallel with the lithium battery port, and the second capacitor is connected in parallel with the first capacitor; the discharging circuit includes a discharging chip, a switching element, and a power output terminal connected in sequence, and the discharging chip is connected to the control switch.

[0006] Furthermore, the discharge circuit also includes a second inductor, a second diode, and a third diode; the third diode is connected to the switching element MOS and the power output terminal respectively, the second inductor is connected to the discharge chip and the third diode respectively, and the second diode and the third diode are connected in parallel.

[0007] Furthermore, the charging circuit also includes an LED diode element, which is connected to the charging chip.

[0008] Furthermore, the charging circuit also includes a second resistor, a third resistor, and a third capacitor connected in series. One end of the second resistor is connected to the charging chip, and the other end is connected to the first diode element.

[0009] Furthermore, the charging circuit also includes a fourth resistor and a fifth resistor, the power input terminal includes a first input terminal and a second input terminal, the fourth resistor is connected to the first input terminal and the charging chip respectively, and the fifth resistor is connected to the second input terminal and the charging chip respectively.

[0010] Furthermore, the charging circuit also includes a sixth resistor, one end of which is connected to the charging chip and the other end of which is connected to the LED diode element.

[0011] Furthermore, the discharge circuit also includes an electrolytic capacitor element and a fourth capacitor, one end of which is connected to the electrolytic capacitor element and the other end of which is connected to the discharge chip.

[0012] Furthermore, the discharge circuit also includes a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, and an eleventh resistor. The ninth resistor, the tenth resistor, and the eleventh resistor are connected in parallel. The seventh resistor is connected to the discharge chip and the eighth resistor, respectively. The eighth resistor is connected to the eleventh resistor and the gate of the switching element, respectively.

[0013] Furthermore, the discharge circuit also includes a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, and a sixteenth resistor. The twelfth and thirteenth resistors are connected in parallel, the fourteenth and fifteenth resistors are connected in parallel, the twelfth resistor is connected to the fifteenth resistor, the thirteenth resistor is connected to the first output terminal of the power supply output terminal, the fourteenth resistor is connected to the second output terminal of the power supply output terminal, and the sixteenth resistor is connected to the discharge chip and the control switch respectively.

[0014] Furthermore, the discharge circuit also includes a fifth capacitor, which is connected to the thirteenth resistor and the fourteenth resistor respectively.

[0015] This utility model includes at least one of the following beneficial technical effects:

[0016] 1. When the heating table needs to be adjusted in height, users can first disconnect the external power supply and then easily turn on the control switch. At this time, the lithium battery can switch to become the main power source, ensuring smooth and uninterrupted height adjustment. This design not only improves the ease of use but also effectively enhances flexibility.

[0017] 2. By turning off the control switch, unnecessary power consumption of the lithium battery can be effectively blocked, thereby extending the battery's lifespan and avoiding unnecessary energy loss. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the charging circuit structure provided by this utility model;

[0020] Figure 2 This is a schematic diagram of the discharge circuit structure provided by this utility model. Detailed Implementation

[0021] The embodiments described in this utility model are for the purpose of more clearly illustrating the technical solution of this utility model, and do not constitute a limitation on the technical solution provided by this utility model. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solution provided by this utility model is also applicable to similar technical problems.

[0022] Furthermore, the terms “including” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating directions or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] These terms are primarily used to better describe the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the terms mentioned above may be used to indicate other meanings besides orientation or positional relationships; for example, the term "above" may in some cases be used to indicate a certain dependency or connection relationship.

[0025] Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0026] Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0027] Unless otherwise stated, the term "multiple" means two or more.

[0028] In this embodiment of the disclosure, the term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0030] It is worth noting that most traditional heating table lifting devices rely on external power supply. This design limits their flexibility and convenience to some extent, especially in scenarios where there is no external power supply or where frequent movement is required. The lifting function of the heating table is greatly limited, and the user experience is thus greatly reduced.

[0031] In view of the above-mentioned problems, this utility model proposes a lithium battery charging and discharging control circuit for a heating table, integrating a charging circuit, a discharging circuit, and a control switch. The charging circuit includes a power input terminal, a first inductor, a charging chip, and a lithium battery port connected in sequence. The charging circuit also includes a first resistor, a first diode, a first capacitor, and a second capacitor. The first resistor is connected to both the first diode and the charging chip. The first diode is connected to the first inductor. The first capacitor is connected in parallel with the lithium battery port, and the second capacitor is connected in parallel with the first capacitor. These components work together to ensure the stability and efficiency of the charging process. The discharging circuit includes a discharging chip, a switching element, and a power output terminal connected in sequence. The discharging chip is connected to the control switch. In practical applications, when the heating table needs to be adjusted in height, the user only needs to disconnect the external power supply first, and then easily turn on the control switch. The lithium battery will seamlessly switch to power supply mode, providing sufficient and stable power support for the height adjustment operation, greatly improving the convenience and flexibility of user use. In addition, the user only needs to simply turn off the control switch to effectively block unnecessary power consumption of the lithium battery, thereby significantly extending the battery's lifespan and avoiding unnecessary energy loss.

[0032] The present invention will be described in detail through the following embodiments.

[0033] This utility model provides a lithium battery charging and discharging control circuit for a heating table, integrating a charging circuit (CC), a discharging circuit (DC), and a control switch (CN3), achieving comprehensive management and optimization of the lithium battery charging and discharging process. See also... Figure 1 , Figure 1This is a schematic diagram of the charging circuit structure provided by this utility model. The charging circuit CC starts from the power input terminal CN1, sequentially connects the first inductor L2 and the charging chip, and connects to the lithium battery port, forming a power transmission path. In addition, the circuit integrates several key components to ensure the stability and efficiency of the charging process. Specifically, the first resistor R11 is connected to the negative terminal of the first diode D3 and the charging chip, which can regulate the charging current; the first diode D3 is connected to the first inductor L2, effectively preventing current from flowing back to the motherboard after the battery is fully charged, providing a solid guarantee for circuit safety. Simultaneously, the first capacitor C7 is connected in parallel with the lithium battery port, and the second capacitor C9 is connected in parallel with the first capacitor C7, jointly improving the circuit's filtering performance and enhancing stability. In this circuit structure, the lithium battery port can be composed of two 3.7V lithium batteries (P1 and P2) connected in series, with a total voltage of 7.4V. This configuration not only improves the voltage level but also further enhances the stability and reliability of the circuit through the parallel use of capacitors.

[0034] It is worth mentioning that LED diode components were also added to the circuit. Figure 1 The LED (displayed as an LED) is connected to the charging chip and acts as a charging indicator light, providing users with intuitive feedback on the charging status. For example, during charging, the LED is red, and when fully charged, the LED turns off.

[0035] In a feasible embodiment, to further enhance the flexibility and adaptability of the circuit, the charging circuit CC also incorporates a series circuit consisting of a second resistor R2, a third resistor R3, and a third capacitor C1. One end of the second resistor R2 is connected to the charging chip, and the other end is connected to the negative terminal of the first diode element D3, providing additional protection for the circuit. Simultaneously, a fourth resistor R7 is connected to the first input terminal (interface 1) of the power input terminal CN1 and the charging chip, respectively, and a fifth resistor R4 is connected to the second input terminal (interface 2) of the power input terminal CN1 and the charging chip, providing a stable voltage input to the charging chip. Furthermore, one end of a sixth resistor R8 is connected to the charging chip, and the other end is connected to the LED diode element, further improving the brightness and stability of the charging indicator light.

[0036] In one feasible embodiment, the charging circuit CC also incorporates capacitors C8 and C10, which are connected in series between the power input terminal CN1 and the charging chip. This further enhances the filtering performance of the circuit and effectively reduces the impact of power fluctuations on the charging process.

[0037] In one feasible embodiment, the charging chip can be the AP6500 chip from WIFI, which has excellent performance and a maximum charging current capability of about 1.5 amps, suitable for charging two standard 18650 lithium batteries, while being able to safely handle voltages up to 4.2V, ensuring that the charging process is both efficient and safe.

[0038] See Figure 2 , Figure 2 This is a schematic diagram of the discharge circuit structure provided by this utility model. The core components of the DC discharge circuit are, in sequence, a discharge chip, a switching element MOS, and a power output terminal CN2. The discharge chip is connected to the lithium battery port through a control switch CN3, where the lithium battery port is connected to interface 2 of the control switch CN3, and the discharge chip is connected to interface 1 of the control switch CN3 through a sixteenth resistor R1. This design ensures that when the heating table needs to be raised or lowered but the external power supply is cut off, the user only needs to turn on the control switch CN3, and the lithium battery can quickly power the system to realize the raising and lowering function. In addition, the DC discharge circuit also introduces a second inductor L1, a second diode D1, and a third diode D2. The second diode D1 and the third diode D2 are connected in parallel. The positive terminal of the third diode D2 is connected to the drain (D terminal) of the switching element MOS, and the negative terminal of the third diode D2 is connected to the power output terminal CN2. The second inductor L1 is connected to both the discharge chip and the positive terminal of the third diode D2. This layout not only optimizes the current path but also improves the overall efficiency of the circuit.

[0039] In one feasible embodiment, to further enhance the filtering and stability performance of the circuit, the discharge circuit DC is also equipped with an electrolytic capacitor EC and a fourth capacitor C3. One end of C3 is connected to EC, and the other end is connected to the discharge chip. This configuration provides the circuit with additional filtering and energy storage functions.

[0040] In one feasible embodiment, the discharge circuit DC also includes multiple resistive elements, specifically including a seventh resistor R10, an eighth resistor R15, a ninth resistor R16, a tenth resistor R17, and an eleventh resistor R20. R16, R17, and R20 are connected in parallel. R10 is connected to both the discharge chip and R15, while R15 is connected to both R20 and the gate (G) of the MOS transistor.

[0041] In one feasible embodiment, the discharge circuit DC also integrates a twelfth resistor R5, a thirteenth resistor R6, a fourteenth resistor R19, a fifteenth resistor R18, and a seventeenth resistor R12. R5 and R6 are connected in parallel, as are R19 and R18. R5 and R18 are connected together, R12 is connected in series with the discharge chip, R6 is connected to the first output terminal of the power output CN2, and R19 is connected to the second output terminal. This design not only enhances the circuit's flexibility but also improves its adaptability. Furthermore, the discharge circuit DC also includes a fifth capacitor C4, which is connected to both R6 and R19, providing additional filtering functionality and ensuring the stability and reliability of the power output.

[0042] In one feasible embodiment, the charging chip can be the AP8100 chip from VSTECS. The DC discharge circuit has the ability to efficiently boost a voltage of 7.4V to 8.4V to 24V and stably output a current of approximately 2A, achieving a power output of 48W. Given that efficiency cannot reach 100% during the boost process, the current requirement before boosting may be higher than the current after boosting. Therefore, a high-performance power battery can be selected to meet this high current requirement (estimated current of approximately 10A).

[0043] In a feasible embodiment, a 50N06 MOSFET can be selected as the core component of the circuit. This MOSFET has a voltage rating of 60V and a current handling capacity of 50A. Considering that the boosted voltage is 24V, and that the MOSFET typically needs to withstand 2-3 times the output voltage, the 60V voltage rating of the 50N06 MOSFET fully meets the requirements. At the same time, its 50A current handling capacity is sufficient to handle the demand for high current output.

[0044] Furthermore, in the selection of the second inductor element L1, a 33μH inductor can be used as the second inductor element L1. Its wire diameter design can easily withstand a current of about 10A, ensuring stable operation of the circuit under high load.

[0045] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of the present utility model.

Claims

1. A lithium battery charging and discharging control circuit for use in a heating table, characterized in that, include: The system includes a charging circuit, a discharging circuit, and a control switch. The charging circuit comprises a power input terminal, a first inductor, a charging chip, and a lithium battery port connected in sequence. The charging circuit also includes a first resistor, a first diode, a first capacitor, and a second capacitor. The first resistor is connected to both the first diode and the charging chip. The first diode is connected to the first inductor. The first capacitor is connected in parallel with the lithium battery port. The second capacitor is connected in parallel with the first capacitor. The discharging circuit comprises a discharging chip, a switching element, and a power output terminal connected in sequence. The discharging chip is connected to the control switch.

2. The lithium battery charging and discharging control circuit for a heating table according to claim 1, characterized in that, The discharge circuit further includes a second inductor, a second diode, and a third diode; the third diode is connected to the switching element MOS and the power output terminal respectively, the second inductor is connected to the discharge chip and the third diode respectively, and the second diode and the third diode are connected in parallel.

3. The lithium battery charging and discharging control circuit for a heating table according to claim 1, characterized in that, The charging circuit also includes an LED diode element, which is connected to the charging chip.

4. The lithium battery charging and discharging control circuit for a heating table according to claim 1, characterized in that, The charging circuit also includes a second resistor, a third resistor, and a third capacitor connected in series. One end of the second resistor is connected to the charging chip, and the other end is connected to the first diode element.

5. The lithium battery charging and discharging control circuit for a heating table according to claim 1, characterized in that, The charging circuit further includes a fourth resistor and a fifth resistor. The power input terminal includes a first input terminal and a second input terminal. The fourth resistor is connected to the first input terminal and the charging chip, respectively. The fifth resistor is connected to the second input terminal and the charging chip, respectively.

6. The lithium battery charging and discharging control circuit for a heating table according to claim 3, characterized in that, The charging circuit also includes a sixth resistor, one end of which is connected to the charging chip and the other end of which is connected to the LED diode element.

7. The lithium battery charging and discharging control circuit for a heating table according to claim 1, characterized in that, The discharge circuit further includes an electrolytic capacitor element and a fourth capacitor, one end of which is connected to the electrolytic capacitor element and the other end of which is connected to the discharge chip.

8. The lithium battery charging and discharging control circuit for a heating table according to claim 1, characterized in that, The discharge circuit further includes a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, and an eleventh resistor. The ninth resistor, the tenth resistor, and the eleventh resistor are connected in parallel. The seventh resistor is connected to the discharge chip and the eighth resistor, respectively. The eighth resistor is connected to the eleventh resistor and the gate of the switching element, respectively.

9. The lithium battery charging and discharging control circuit for a heating table according to claim 1, characterized in that, The discharge circuit further includes a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, and a sixteenth resistor. The twelfth and thirteenth resistors are connected in parallel, the fourteenth and fifteenth resistors are connected in parallel, the twelfth resistor is connected to the fifteenth resistor, the thirteenth resistor is connected to the first output terminal of the power supply output terminal, the fourteenth resistor is connected to the second output terminal of the power supply output terminal, and the sixteenth resistor is connected to the discharge chip and the control switch respectively.

10. The lithium battery charging and discharging control circuit for a heating table according to claim 9, characterized in that, The discharge circuit also includes a fifth capacitor, which is connected to the thirteenth resistor and the fourteenth resistor respectively.

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