Circuit layout with good heat dissipation effect

Abstract

The utility model relates to a circuit layout with a good heat dissipation effect, which comprises a circuit board and two batteries, and is characterized in that the circuit board comprises an electrostatic surge protection circuit and an MCU (Microprogrammed Control Unit) master controller; the two-section battery comprises a first-section battery and a second-section battery, the first-section battery and the second-section battery are connected in series to form the two-section battery, and the two-section battery is electrically connected with the circuit board through a lead; the electrostatic surge protection circuit is used for absorbing or releasing static electricity and surge. And the electrostatic surge protection circuit is independently arranged on the circuit board, so that the heat dissipation effect is effectively improved, and the problem of circuit overheating caused by insufficient heat dissipation capability of the battery is avoided. Therefore, the reliability of the circuit is improved, and the service life of the circuit is prolonged. The electrostatic surge protection circuit can effectively absorb or release static electricity and surge, protect other circuit elements from being damaged, and improve the anti-interference capability and reliability of the circuit.

Description

Technical Field

[0001] The utility model relates to a circuit layout with good heat dissipation effect. Background Art

[0002] In the circuit design of a hair care comb in the prior art, an electrostatic surge protection circuit is directly arranged on a double - cell battery, resulting in poor heat dissipation. The main function of the electrostatic surge protection circuit is to absorb or release static electricity and surges to protect other parts of the circuit from damage. However, when the electrostatic surge protection circuit is arranged on the double - cell battery, due to the limited heat dissipation capacity of the battery, it is easy to cause the circuit to overheat, thus affecting the overall performance and service life.

[0003] Especially in a hair care comb, with the battery and circuit board placed in the limited space of the hair care comb, if the electrostatic surge protection circuit is still directly arranged on the double - cell battery, there will be a problem of poor heat dissipation. Content of the Utility Model

[0004] The purpose of the utility model is to provide a circuit layout with simple structure and good heat dissipation effect.

[0005] The purpose of the utility model is realized as follows:

[0006] A circuit layout with good heat dissipation effect, including a circuit board and a double - cell battery. The circuit board includes an electrostatic surge protection circuit and an MCU main control.

[0007] The double - cell battery includes a first - cell battery and a second - cell battery. The first - cell battery and the second - cell battery are connected in series to form the double - cell battery, and the double - cell battery is electrically connected to the circuit board through a lead.

[0008] The electrostatic surge protection circuit is used to absorb or release static electricity and surges.

[0009] Independently arranging the electrostatic surge protection circuit on the circuit board effectively improves the heat dissipation effect and avoids the problem of circuit overheating caused by insufficient heat dissipation capacity of the battery. This not only improves the reliability of the circuit but also extends the service life of the circuit.

[0010] The electrostatic surge protection circuit can effectively absorb or release static electricity and surges, protect other circuit components from damage, and improve the anti - interference ability and reliability of the circuit.

[0011] The purpose of the utility model can also be solved by the following technical measures:

[0012] Furthermore, the circuit board further includes a battery balancing circuit. The battery balancing circuit detects the voltages of the first - cell battery and the second - cell battery in real time and determines whether the voltages of the first - cell battery and the second - cell battery are consistent and balanced.

[0013] When the voltages of the first battery and the second battery are inconsistent, the battery equalization circuit discharges the battery with a higher voltage until its voltage is the same as that of the battery with a lower voltage, achieving voltage equalization.

[0014] By using the battery equalization circuit to detect and adjust the voltages of the first battery and the second battery in real time, it ensures that the voltages of the two batteries are always consistent and balanced, avoiding the problem of uneven battery voltages. This can prevent the battery from being damaged due to overcharging or over-discharging, and significantly extend the service life and overall performance of the battery.

[0015] By ensuring the consistent and balanced voltage of the battery and optimizing the heat dissipation effect, users can enjoy more durable and stable performance when using the hair care comb, avoiding usage interruptions or device damage caused by battery problems.

[0016] Furthermore, the circuit board further includes a charging management circuit, which is used for boosting or bucking the voltage of the battery for charging and current control.

[0017] The charging management circuit can boost or buck the voltage of the battery for charging and control the charging current, ensuring that the battery is charged in the best state and improving the charging efficiency. In addition, it can also prevent overcharging and over-discharging, ensuring the safety of the charging process.

[0018] Through the collaborative work of each circuit module, the reliability of the overall circuit has been significantly improved. Whether in high-power, high-current usage scenarios or in daily use, the circuit can maintain a stable working state, reducing the probability of failures.

[0019] Furthermore, a first lead is provided at the positive electrode of the dual-battery;

[0020] a second lead is provided at the negative electrode of the dual-battery;

[0021] a third lead is provided at the series connection position of the first battery and the second battery;

[0022] The first lead, the second lead, and the third lead are respectively connected to the circuit board.

[0023] Furthermore, the circuit board further includes an EMC filtering circuit, a battery protection circuit, a tube temperature detection circuit, an LDO power supply, a battery voltage detection circuit, a heating element drive circuit, a human-computer interaction operation button module, a human-computer interaction indicator light module, and a negative ion drive module;

[0024] The EMC filtering circuit is used to block EMI interference emission or to interfere with EMS reception;

[0025] The battery protection circuit is used to control the MOS transistor switch to prevent overcharging, over-discharging, overcurrent, and short circuits;

[0026] The tube temperature detection circuit is used to detect the temperature of the heating element, the temperature of the battery, and the temperature of the MOS tube with high power and large current;

[0027] The LDO power supply is used to provide a stable 5V voltage for the MCU main control;

[0028] The battery voltage detection circuit is used to detect the battery voltage and obtain the battery power;

[0029] The heating element drive circuit is used to prevent thermal runaway of the heating element and control the heating of the heating element;

[0030] The human-computer interaction operation button module includes a child lock module and a function button module. The child lock module is used to prevent children from accidentally touching, and the function button module is used to select the corresponding function;

[0031] The human-computer interaction indicator light module is used to display the function status of the hair care comb.

[0032] The EMC filter circuit can effectively block the emission of electromagnetic interference (EMI) or interfere with the reception of electromagnetic sensitivity (EMS), ensure the stable operation of the circuit in various electromagnetic environments, and improve the anti-interference ability and reliability of the circuit.

[0033] The battery protection circuit controls the MOS tube switch to prevent overcharging, over-discharging, over-current, and short-circuit of the battery, ensure the safe use of the battery in various situations, extend the service life of the battery, and prevent potential safety hazards.

[0034] The tube temperature detection circuit can detect the temperature of the heating element, the battery, and the MOS tube with high power and large current in real time, provide effective temperature monitoring and protection, prevent equipment failures caused by overheating, and improve the safety and stability of the circuit.

[0035] The LDO power supply provides a stable 5V voltage for the MCU main control, ensure that the MCU can work stably under various load conditions, and improve the overall performance and reliability of the circuit.

[0036] The battery voltage detection circuit can detect the battery voltage in real time, obtain the battery power information, provide accurate battery status for battery management and users, and improve the user experience.

[0037] The heating element drive circuit prevents thermal runaway of the heating element and provides precise temperature control of the heating element to ensure the safety and effectiveness of the hair care comb during use.

[0038] The human-computer interaction operation button module includes a child lock module and a function button module, providing a safety function to prevent children from accidentally touching and a convenient operation to select the corresponding function.

[0039] The human-computer interaction indicator module can intuitively display the functional status of the hair care comb, enhancing the user's operation experience and convenience.

[0040] The negative ion drive module can provide a negative ion function, which helps to improve the hair care effect and increase the user's satisfaction and effectiveness.

[0041] Furthermore, the tube temperature detection circuit includes a heating element temperature detection circuit, a battery temperature detection circuit, and a MOS tube temperature detection circuit.

[0042] The beneficial effects of the present utility model are as follows:

[0043] In the present utility model, the battery equalization circuit is used to detect and adjust the voltages of the first battery and the second battery in real time, ensuring that the voltages of the two batteries are always consistent and balanced, and avoiding the problem of unbalanced battery voltages. This can prevent the batteries from being damaged due to overcharging or over-discharging, and significantly extend the service life and overall performance of the batteries.

[0044] In the present utility model, the electrostatic surge protection circuit is independently arranged on the circuit board, effectively improving the heat dissipation effect and avoiding the problem of circuit overheating caused by insufficient battery heat dissipation capacity. This not only improves the reliability of the circuit but also extends the service life of the circuit.

[0045] The present utility model effectively solves the problems of poor heat dissipation and unbalanced battery voltages in the prior art, and significantly improves the performance, reliability, and user experience of the circuit.

[0046] By adding an EMC filtering circuit, a battery protection circuit, a tube temperature detection circuit, an LDO power supply, a battery voltage detection circuit, a heating element drive circuit, a human-computer interaction operation button module, a human-computer interaction indicator module, and a negative ion drive module, the present utility model further enhances the functions and performance of the hair care comb circuit, improves the safety, reliability, and user experience of the circuit, and has significant beneficial effects. Description of the Drawings

[0047] Figure 1 It is a combined schematic diagram of an electrostatic surge protection circuit, an EMC filtering circuit, and a charging management circuit.

[0048] Figure 2 It is a combined schematic diagram of a battery protection circuit and a battery equalization circuit.

[0049] Figure 3 It is a schematic diagram of a MOS tube temperature detection circuit.

[0050] Figure 4 It is a schematic diagram of a heating element temperature detection circuit.

[0051] Figure 5 It is a schematic diagram of a battery temperature detection circuit.

[0052] Figure 6 It is a schematic diagram of the LDO power supply.

[0053] Figure 7 It is a schematic diagram of the battery voltage detection circuit.

[0054] Figure 8 It is a schematic diagram of the heating element drive circuit.

[0055] Figure 9 It is a schematic diagram of the child lock module.

[0056] Figure 10 It is a schematic diagram of the function button module.

[0057] Figure 11 It is a schematic diagram of the human-machine interaction indicator module.

[0058] Figure 12 It is a schematic diagram of the negative ion drive module.

[0059] Figure 13 It is a schematic diagram of the MCU main control module.

[0060] Figure 14 It is a schematic diagram of the connection between the circuit board and the double-cell battery. Specific implementation manners

[0061] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments:

[0062] Embodiment, in combination with Figures 1 to 14 As shown, a circuit layout with good heat dissipation effect includes a circuit board 18 and a double-cell battery 17. The circuit board 18 includes an MCU main control, an electrostatic surge protection circuit 1, a charging management circuit 3, and a battery equalization circuit 5;

[0063] The double-cell battery 17 includes a first battery 171 and a second battery 172. The first battery 171 and the second battery 172 are connected in series to form the double-cell battery 17;

[0064] A first lead is provided at the positive electrode of the double-cell battery 17;

[0065] A second lead is provided at the negative electrode of the double-cell battery 17;

[0066] A third lead is provided at the series connection position of the first battery 171 and the second battery 172;

[0067] The first lead, the second lead, and the third lead are respectively connected to the circuit board 18;

[0068] U1 of the battery equalization circuit 5 detects the voltages of the first battery 171 and the second battery 172 in real time and determines whether the voltages of the first battery 171 and the second battery 172 are equal for equalization;

[0069] When the voltages of the first battery 171 and the second battery 172 are not equal, U1 controls the MOS transistor to discharge the battery with a high voltage until the voltage is the same as that of the battery with a low voltage, achieving voltage equalization;

[0070] The electrostatic surge protection circuit 1 is used to absorb or release static electricity and surges;

[0071] The charging management circuit 3 is used to boost or buck charge the battery and control the current, and the product supports fast charging. The fast charging U2 chip performs protocol handshakes through DPC, DMP, CC1, and CC2, and controls and manages the peripheral MOS transistors and inductors through U2 to boost or buck charge the battery and control the current.

[0072] Further, the circuit board 18 further includes an EMC filtering circuit 2, a battery protection circuit 4, a tube temperature detection circuit, an LDO power supply 9, a battery voltage detection circuit 10, a heating element drive circuit 11, a human-computer interaction operation button module, a human-computer interaction indicator light module 14, and a negative ion drive module 15;

[0073] The EMC filtering circuit 2 is used to block EMI interference emission or to interfere with EMS reception;

[0074] The battery protection circuit 4 detects the battery voltage through U1 and is used to control the MOS transistor switch to prevent overcharging, over-discharging, over-current, and short circuits;

[0075] The tube temperature detection circuit is used to detect the temperature of the heating element, the temperature of the battery, and the temperature of the MOS transistor with high power and large current;

[0076] NTC1 detects the temperature of the heating element and allows the product to work in the range of 160 degrees to 210 degrees

[0077] NTC2 detects the temperature of the battery, and the product works in the range of 0 to 50 degrees during charging and -20 to 60 degrees during discharging

[0078] NTC3 is mounted beside the MOS transistor with high power and large current and detects that the temperature cannot be higher than 90 degrees. When the temperature exceeds this value, the product shuts down and stops working to prevent the MOS transistor from being burned due to excessive temperature.

[0079] The LDO power supply 9 is used to provide a stable 5V voltage for the MCU main control;

[0080] The battery voltage detection circuit 10 is used to detect the battery voltage and obtain the battery power;

[0081] The heating element driving circuit 11 is used to prevent thermal runaway of the heating element and control the heating of the heating element.

[0082] F+ and F- are connected to the temperature fuse to prevent thermal runaway of the heating element, continuous heating, burning out the casing and causing danger.

[0083] H+ and H- are connected to the heating element, and the heating is controlled by MOS transistors.

[0084] The human-computer interaction operation button module includes a child lock module 12 and a function button module 13. The child lock module 12 is used to prevent children from accidentally touching, and the function button module 13 is used to select the corresponding function.

[0085] The human-computer interaction indicator light module 14 is used to display the function status of the hair care comb.

[0086] Furthermore, the tube temperature detection circuit includes a heating element temperature detection circuit 7, a battery temperature detection circuit 8, and a MOS transistor temperature detection circuit 6.

[0087] The circuit layout with good heat dissipation effect in the above embodiment is applied to the hair care comb. In other embodiments, the circuit layout with good heat dissipation effect can also be applied to other products.

[0088] In the prior art, after the double-section battery 17 is used with a large current in the product for many times, the phenomenon of unbalanced battery voltage often occurs. This voltage imbalance is mainly reflected in the voltage difference between the two batteries. The unbalanced battery voltage will not only cause the battery not to be fully charged, but also make the battery unable to be fully discharged, affecting the overall use effect of the product and the battery life.

[0089] In the present utility model, the battery balancing circuit 5 is used to detect and adjust the voltages of the first battery 171 and the second battery 172 in real time, ensuring that the voltages of the two batteries are always consistent and balanced, and avoiding the problem of unbalanced battery voltage. In this way, it can prevent the battery from being damaged due to overcharging or over-discharging, and significantly extend the service life and overall performance of the battery.

[0090] By ensuring the consistent balance of the battery voltage and optimizing the heat dissipation effect, users can enjoy more durable and stable performance when using the hair care comb, avoiding use interruption or device damage caused by battery problems.

Claims

1. A circuit layout with good heat dissipation effect, including a circuit board and a double - cell battery, characterized in that: The circuit board includes an electrostatic surge protection circuit and an MCU main control; The double - cell battery includes a first - section battery and a second - section battery. The first - section battery and the second - section battery are connected in series to form the double - cell battery, and the double - cell battery is electrically connected to the circuit board through leads; The electrostatic surge protection circuit is used to absorb or release static electricity and surges.

2. The circuit layout with good heat dissipation effect according to claim 1, characterized in that: The circuit board further includes a battery equalization circuit, which continuously detects the voltages of the first - section battery and the second - section battery and determines whether the voltages of the first - section battery and the second - section battery are consistent and balanced; When the voltages of the first - section battery and the second - section battery are inconsistent, the battery equalization circuit discharges the battery with a higher voltage until its voltage is the same as that of the battery with a lower voltage, achieving voltage balance.

3. The circuit layout with good heat dissipation effect according to claim 1, characterized in that: The circuit board further includes a charging management circuit, which is used for boosting or buck - charging the battery and controlling the current.

4. The circuit layout with good heat dissipation effect according to claim 1, characterized in that: A first lead is provided at the positive pole of the double - cell battery; A second lead is provided at the negative pole of the double - cell battery; A third lead is provided at the series connection position of the first - section battery and the second - section battery; The first lead, the second lead, and the third lead are respectively connected to the circuit board.

5. The circuit layout with good heat dissipation effect according to claim 1 is characterized in that: The circuit board further includes an EMC filtering circuit, a battery protection circuit, a tube temperature detection circuit, an LDO power supply, a battery voltage detection circuit, a heating element drive circuit, a human - machine interaction operation button module, a human - machine interaction indicator module, and a negative - ion drive module; The EMC filtering circuit is used to block EMI interference emission or to interfere with EMS reception; The battery protection circuit is used to control the MOS - tube switch to prevent over - charging, over - discharging, over - current, and short - circuit; The tube temperature detection circuit is used to detect the temperature of the heating element, the temperature of the battery, and the temperature of the MOS tube with high power and large current; The LDO power supply is used to provide a stable 5V voltage to the MCU main control; The battery voltage detection circuit is used to detect the battery voltage and obtain the battery power; The heating element drive circuit is used to prevent the heating element from thermal runaway and to control the heating of the heating element; The human - machine interaction operation button module includes a child - lock module and a function button module. The child - lock module is used to prevent children from accidentally touching, and the function button module is used to select the corresponding function; The human - machine interaction indicator module is used to display the function status of the hair - care comb.

6. The circuit layout with good heat dissipation effect according to claim 5, characterized in that: The tube temperature detection circuit includes a heating - element temperature detection circuit, a battery - temperature detection circuit, and a MOS - tube temperature detection circuit.

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