Charging control circuit and charging data line
By introducing an NTC detection module and a main control module into the charging data cable to monitor temperature and power in real time and adjust the charging power, the problem of insufficient safety of high-power fast charging data cables is solved, and safe and reliable charging control is achieved.
Patent Information
- Application Number
- CN202422719464.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-07
AI Technical Summary
High-power fast charging cables on the market lack safety protection, which makes them prone to damage due to overheating during charging, posing a safety risk.
The system employs a charging control circuit, including an NTC detection module, a main control module, and a power detection module, to monitor temperature and charging power in real time. The main control module adjusts the charging power according to a preset relationship to ensure a safe charging process.
This effectively avoids damage to the data cable due to excessive temperature, extends the lifespan of the data cable, and enables a safer charging process.
Smart Images
Figure CN223502607U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to data cable technology, and more particularly to a charging control circuit and a charging data cable. Background Technology
[0002] As electronic products continue to upgrade, users' demand for charging speed is also increasing, and more and more high-power fast charging data cables are entering the market.
[0003] However, most high-power fast charging cables on the market lack safety protection, making them prone to damage due to overheating during charging, posing a certain safety risk. Utility Model Content
[0004] This utility model provides a charging control circuit and a charging data cable.
[0005] The technical solution of this utility model is implemented as follows:
[0006] This utility model provides a charging control circuit, which is mounted on a printed circuit board (PCB). The charging control circuit includes: a negative temperature coefficient (NTC) detection module, a main control module, and a power detection module. The main control module is connected to the NTC detection module and the power detection module respectively.
[0007] The NTC detection module is used to detect the temperature value of the PCB board in real time after the charging control circuit is powered on, and send the detected current temperature value to the main control module.
[0008] The power detection module is used to detect the charging power of the charging control circuit in real time and send the detected current charging power to the main control module.
[0009] The main control module is used to determine the target charging power corresponding to the current temperature value, and to perform charging control based on the target charging power and the current charging power.
[0010] In some embodiments, the charging control circuit further includes a power supply terminal and a power consumption terminal, wherein the power detection module is connected between the power supply terminal and the power consumption terminal.
[0011] In some embodiments, the power supply terminal is used to connect to a power supply device, and the power consumption terminal is used to connect to a power consumption device.
[0012] In some embodiments, the main control module is further configured to:
[0013] Detect whether the current charging power is equal to the target charging power;
[0014] If the current charging power is not equal to the target charging power, the power detection module is controlled to adjust the charging power so that the adjusted charging power is the target charging power.
[0015] In some embodiments, the main control module is further configured to:
[0016] Determine the target temperature range corresponding to the current temperature value, and determine the target charging power corresponding to the target temperature range according to a preset correspondence.
[0017] In some embodiments, the preset correspondence includes a one-to-one correspondence between multiple preset temperature ranges and multiple preset charging powers.
[0018] In some embodiments, the plurality of preset temperature ranges include a first temperature range, a second temperature range, a third temperature range, and a fourth temperature range, and the plurality of preset charging powers include a first preset charging power corresponding to the first temperature range, a second preset charging power corresponding to the second temperature range, a third preset charging power corresponding to the third temperature range, and a fourth preset charging power corresponding to the fourth temperature range, wherein the first temperature range is smaller than the second temperature range, the second temperature range is smaller than the third temperature range, and the third temperature range is smaller than the fourth temperature range.
[0019] In some embodiments, the first temperature range is less than or equal to 55 degrees, the second temperature range is 56 to 65 degrees, the third temperature range is 66 to 75 degrees, and the fourth temperature range is 76 to 80 degrees.
[0020] In some embodiments, the first preset charging power is 100W, the second preset charging power is 65W, the third preset charging power is 45W, and the fourth preset charging power is 15W.
[0021] This utility model also provides a charging data cable, which includes the aforementioned charging control circuit.
[0022] This invention provides a charging control circuit and a charging data cable. The charging control circuit is mounted on a PCB board and includes an NTC detection module, a main control module, and a power detection module. The main control module is connected to both the NTC detection module and the power detection module. The NTC detection module is used to detect the temperature of the PCB board in real time after the charging control circuit is powered on and send the detected current temperature value to the main control module. The power detection module is used to detect the charging power of the charging control circuit in real time and send the detected current charging power to the main control module. The main control module is used to determine the target charging power corresponding to the current temperature value and perform charging control based on the target charging power and the current charging power.
[0023] As can be seen, in this invention, the main control module can determine the corresponding target charging power based on the current temperature value detected in real time by the NTC detection module, and then perform charging control based on the target charging power and the current charging power detected in real time by the power detection module. That is, the charging power can be controlled according to the temperature change during the charging process to ensure the safety of the charging process. If this charging control circuit is applied to a data cable, it can avoid damage to the data cable due to excessive temperature during the charging process, thereby improving the service life of the data cable and achieving safer charging. Attached Figure Description
[0024] Figure 1 An application scenario diagram of a charging control circuit provided by this utility model;
[0025] Figure 2 A first structural schematic diagram of the charging control circuit provided by this utility model;
[0026] Figure 3 A second structural schematic diagram of the charging control circuit provided by this utility model;
[0027] Figure 4 This is a schematic diagram of the structure of a charging data cable provided by this utility model.
[0028] Explanation of reference numerals in the attached diagram: 1. Charging control circuit; 10. PCB board; 11. NTC detection module; 12. Main control module; 13. Power detection module; 14. Power supply end; 15. Power consumption end; 2. Charging data cable; 20. Power supply equipment; 21. Power consumption equipment. Detailed Implementation
[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0030] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
[0031] Figure 1 An application scenario diagram of a charging control circuit provided by this utility model is shown, such as... Figure 1 As shown, the charging control circuit 1 can be applied to the charging data cable 2; wherein, one end of the charging data cable 2 is connected to the power supply device 20, and the other end is connected to the power user device 21.
[0032] For example, the charging data cable 2 can be a fast charging data cable or a regular data cable, and this utility model does not limit it in this way.
[0033] Here, the types of power supply equipment 20 and power consumption equipment 21 are not limited; for example, power supply equipment 20 may include, but is not limited to, power supply devices such as power adapters, energy storage devices and power sockets; power consumption equipment 21 may include, but is not limited to, electronic devices that need to be charged such as mobile phones, computers and tablets.
[0034] As can be seen, in this utility model, if the charging control circuit 1 is applied to the charging data line 2, the charging data line 2 obtains voltage from the power supply device 20 and transmits it to the power user device 21 for charging.
[0035] Below Figure 1 Based on, combined Figure 2 The above process is illustrated by example.
[0036] For example, Figure 2 This is a first structural schematic diagram of the charging control circuit provided by this utility model, as shown below. Figure 2 As shown, the charging control circuit 1 is mounted on the PCB board 10. The charging control circuit 1 includes: an NTC detection module 11, a main control module 12, and a power detection module 13. The main control module 12 is connected to both the NTC detection module 11 and the power detection module 13.
[0037] The NTC detection module 11 is used to detect the temperature value of the PCB board 10 in real time after the charging control circuit 1 is powered on, and send the detected current temperature value to the main control module 12.
[0038] The power detection module 13 is used to detect the charging power of the charging control circuit 1 in real time and send the detected current charging power to the main control module 12.
[0039] The main control module 12 is used to determine the target charging power corresponding to the current temperature value, and to perform charging control based on the target charging power and the current charging power.
[0040] In this invention, the NTC detection module 11 is connected to the PCB board 10 and is used to detect the temperature value of the PCB board 10 in real time after the charging control circuit 1 is powered on.
[0041] For example, the NTC detection module 11 includes an NTC temperature sensor, which is essentially an adjustable resistor whose resistance changes with temperature. The higher the temperature, the lower its resistance and the lower the voltage across it. That is, the change in resistance will cause a change in voltage.
[0042] In this invention, when using an NTC temperature sensor to detect the temperature value of the PCB board 10 in real time, the current resistance value of the NTC temperature sensor can be determined first, and then the current temperature value of the PCB board 10 can be determined based on the current resistance value.
[0043] In practical scenarios, the NTC temperature sensor forms a voltage divider circuit with a fixed resistor. In this case, the analog voltage signal across the NTC temperature sensor can be measured, and then converted into a digital voltage signal by an analog-to-digital converter (ADC). Then, according to the voltage divider formula: U = (R / Rtotal) * USource, the current resistance R of the NTC temperature sensor can be determined. Finally, the current temperature value of PCB board 10 can be determined based on the current resistance R. Here, U refers to the voltage across the NTC temperature sensor, USource refers to the power supply voltage VCC, and Rtotal refers to the sum of the current resistance R of the NTC temperature sensor and the resistance of the fixed resistor.
[0044] For example, the NTC detection module 11 stores the temperature resistance value correspondence of the NTC temperature sensor, which indicates that each resistance value has a corresponding temperature value. It should be noted that the temperature resistance value correspondence can be represented by a function expression or by a lookup table, and no specific limitation is made here.
[0045] Understandably, since the NTC detection module 11 stores the temperature resistance value correspondence of the NTC temperature sensor, after determining the current resistance value R of the NTC temperature sensor, the current temperature value of the PCB board 10 can be determined according to the temperature resistance value correspondence. Furthermore, after the NTC detection module 11 determines the current temperature value of the PCB board 10, it can send the current temperature value to the main control module 12. At this time, the main control module 12 receives the current temperature value of the PCB board 10.
[0046] For example, the main control module 12 is also called a microcontroller unit (MCU) chip, which can support fast charging protocols. Here, there are no specific limitations on the model and package form of the MCU chip; for example, the MCU chip can be a VL103-Q4 chip that supports fast charging protocols.
[0047] In this invention, after receiving the current temperature value of the PCB board 10, the main control module 12 can further determine the target charging power corresponding to the current temperature value.
[0048] In some embodiments, the main control module 12 is further configured to: determine the target temperature range corresponding to the current temperature value, and determine the target charging power corresponding to the target temperature range according to a preset correspondence.
[0049] For example, the main control module 12 stores a preset correspondence, which includes a one-to-one correspondence between multiple preset temperature ranges and multiple preset charging powers.
[0050] In this invention, the current temperature value is located within the target temperature range, which is one of a plurality of preset temperature ranges. The target temperature range has a uniquely corresponding preset charging power, namely the target charging power, which is the highest charging power corresponding to the target temperature range.
[0051] In this invention, after receiving the current temperature value of the PCB board 10, the main control module 12 can first determine the target temperature range corresponding to the current temperature value, and then determine the target charging power corresponding to the target temperature range according to the preset correspondence.
[0052] Here, there is no specific limit to the number of preset temperature ranges and preset charging powers, as long as the number of both is the same and they have a one-to-one correspondence.
[0053] In some embodiments, the multiple preset temperature ranges may include a first temperature range, a second temperature range, a third temperature range, and a fourth temperature range, and the multiple preset charging powers may include a first preset charging power corresponding to the first temperature range, a second preset charging power corresponding to the second temperature range, a third preset charging power corresponding to the third temperature range, and a fourth preset charging power corresponding to the fourth temperature range, wherein the first temperature range is smaller than the second temperature range, the second temperature range is smaller than the third temperature range, and the third temperature range is smaller than the fourth temperature range; for ease of understanding, the following description is based on Table 1.
[0054] For example, Table 1 shows a correspondence between an optional preset temperature range and a preset charging power. As shown in Table 1, the first temperature range is less than or equal to 55 degrees, the second temperature range is 56 to 65 degrees, the third temperature range is 66 to 75 degrees, and the fourth temperature range is 76 to 80 degrees. Correspondingly, the first preset charging power is 100W, the second preset charging power is 65W, the third preset charging power is 45W, and the fourth preset charging power is 15W.
[0055] Preset charging power gear Preset temperature range 15W 5V = 3A 76-80 degrees 45W 9V = 5A 66 degrees - 75 degrees 65W 20V = 3.25A 56 degrees - 65 degrees 100W 20V = 5A ≤55 degrees
[0056] Table 1
[0057] It should be noted that Table 1 only provides one possible correspondence between preset temperature range and preset charging power. In practical applications, the correspondence between the two can be adjusted adaptively according to the actual situation, and no specific limitation is made here. For example, when the preset charging power is 100W, the corresponding preset temperature range can also be less than or equal to 45 degrees.
[0058] In this invention, after the charging control circuit is powered on, the charging power of the charging control circuit 1 can be detected in real time by the power detection module 13. Here, the principle of the power detection module 13 for power detection is P = U * I, that is, by detecting the charging voltage U and the charging current I, the charging power can be calculated in real time, and the calculated current charging power is sent to the main control module 12.
[0059] For example, after the main control module 12 determines the target charging power corresponding to the current temperature value according to the preset correspondence, it can obtain the current charging power sent by the power detection module 13, and then perform charging control based on the target charging power and the current charging power.
[0060] In some embodiments, the main control module 12 is further configured to: detect whether the current charging power is equal to the target charging power; and if the current charging power is not equal to the target charging power, control the power detection module 13 to adjust the charging power so that the adjusted charging power is the target charging power.
[0061] For example, after the main control module 12 obtains the current charging power sent by the power detection module, it can compare the current charging power with the target charging power and determine whether the current charging power and the target charging power are equal based on the comparison result.
[0062] For example, assuming the current charging power is P0, after the main control module 12 obtains the current charging power P0, it can compare the current charging power P0 with the target charging power P1 to determine whether the current charging power P0 and the target charging power P1 are equal.
[0063] For example, if the current charging power is not equal to the target charging power, it means that the current charging power has not reached or has exceeded the maximum charging power corresponding to the target temperature range. In this case, the power detection module can be controlled to adjust the charging power so that the adjusted charging power is the target charging power. If the current charging power is equal to the target charging power, it means that the current charging power has reached the maximum charging power corresponding to the target temperature range. In this case, there is no need to adjust the charging power.
[0064] Here, the method of adjusting the charging power is not specifically limited. For example, the charging control circuit 1 may also include a power management chip, which is connected between the main control module 12 and the power detection module 13. In this case, the charging power can be adjusted by adjusting the voltage through the feedback pin (FB) of the power management chip. In another embodiment, the charging power can also be adjusted by adjusting the switching frequency.
[0065] As can be seen, in this invention, when the current charging power is not equal to the target charging power, the charging power is adjusted so that the adjusted charging power is the target charging power. That is, by limiting the temperature value of the charging power control circuit, damage to the data line due to excessive temperature during charging can be avoided. In addition, the target charging power is the highest charging power corresponding to the target temperature range. Through the above adjustment method, it can also be ensured that the circuit always charges the device at a high power, thereby improving charging efficiency.
[0066] In this invention, the charging control circuit may further include: a power supply terminal 14 and a power consumption terminal 15; for example, Figure 3 This is a second structural schematic diagram of the charging control circuit provided by this utility model, as shown below. Figure 3 As shown, the power detection module 13 is connected between the power supply terminal 14 and the power consumption terminal 15.
[0067] For example, the power supply terminal 4, also known as the source terminal, is used to connect the power supply equipment; the power consumption terminal 5, also known as the sink terminal, is used to connect the power consumption equipment.
[0068] In this invention, the charging direction of the charging control circuit is: the power supply terminal 4 charges the power consumption terminal 5. If the charging control circuit is applied to a charging data cable, the power receiving terminal of the charging data cable obtains voltage from the power supply terminal to charge the device.
[0069] This utility model also provides a charging data cable 2, such as Figure 4 As shown, the charging data line 2 includes the charging control circuit 1 of any of the above schemes.
[0070] As in the aforementioned embodiment, the charging control circuit is mounted on the PCB board. The charging control circuit includes an NTC detection module, a main control module, and a power detection module. The main control module is connected to the NTC detection module and the power detection module, respectively.
[0071] The NTC detection module is used to detect the temperature value of the PCB board in real time after the charging control circuit is powered on, and send the detected current temperature value to the main control module.
[0072] The power detection module is used to detect the charging power of the charging control circuit in real time and send the detected current charging power to the main control module.
[0073] The main control module is used to determine the target charging power corresponding to the current temperature value, and to perform charging control based on the target charging power and the current charging power.
[0074] As in the aforementioned embodiments, the charging control circuit further includes a power supply terminal and a power consumption terminal, and the power detection module is connected between the power supply terminal and the power consumption terminal.
[0075] As in the aforementioned embodiments, the power supply terminal is used to connect to the power supply equipment, and the power consumption terminal is used to connect to the power consumption equipment.
[0076] As in the foregoing embodiments, the main control module is further configured to:
[0077] Detect whether the current charging power is equal to the target charging power;
[0078] If the current charging power is not equal to the target charging power, the power detection module is controlled to adjust the charging power so that the adjusted charging power is the target charging power.
[0079] As in the foregoing embodiments, the main control module is further configured to:
[0080] Determine the target temperature range corresponding to the current temperature value, and determine the target charging power corresponding to the target temperature range according to a preset correspondence.
[0081] As in the aforementioned embodiments, the preset correspondence includes a one-to-one correspondence between multiple preset temperature ranges and multiple preset charging powers.
[0082] As in the aforementioned embodiments, the plurality of preset temperature ranges include a first temperature range, a second temperature range, a third temperature range, and a fourth temperature range, and the plurality of preset charging powers include a first preset charging power corresponding to the first temperature range, a second preset charging power corresponding to the second temperature range, a third preset charging power corresponding to the third temperature range, and a fourth preset charging power corresponding to the fourth temperature range, wherein the first temperature range is smaller than the second temperature range, the second temperature range is smaller than the third temperature range, and the third temperature range is smaller than the fourth temperature range.
[0083] As in the aforementioned embodiments, the first temperature range is less than or equal to 55 degrees, the second temperature range is 56 to 65 degrees, the third temperature range is 66 to 75 degrees, and the fourth temperature range is 76 to 80 degrees.
[0084] As in the aforementioned embodiments, the first preset charging power is 100W, the second preset charging power is 65W, the third preset charging power is 45W, and the fourth preset charging power is 15W.
[0085] As can be seen, in this embodiment, the current charging power of the circuit is detected in real time by the power detection module, and the current charging power is fed back to the main control module in real time. The main control module judges whether the current charging power and the target charging power are equal, and determines the adjusted charging power based on the judgment result. That is, by limiting the charging power, the temperature value of the PCB board is controlled. In this way, damage to the charging data line caused by excessive temperature during the charging process can be avoided, and safer charging can be achieved.
[0086] The above are merely embodiments of this utility model, but do not limit the patent scope of this utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.
[0087] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of the present invention, the sequence number of the above-described processes does not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the present invention. The above-described sequence numbers are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.
[0088] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A charging control circuit, characterized in that, The charging control circuit is mounted on the PCB board and includes an NTC detection module, a main control module, and a power detection module. The main control module is connected to the NTC detection module and the power detection module, respectively. The NTC detection module is used to detect the temperature value of the PCB board in real time after the charging control circuit is powered on, and send the detected current temperature value to the main control module. The power detection module is used to detect the charging power of the charging control circuit in real time and send the detected current charging power to the main control module. The main control module is used to determine the target charging power corresponding to the current temperature value, and to perform charging control based on the target charging power and the current charging power.
2. The circuit according to claim 1, characterized in that, The charging control circuit further includes a power supply terminal and a power consumption terminal, and the power detection module is connected between the power supply terminal and the power consumption terminal.
3. The circuit according to claim 2, characterized in that, The power supply terminal is used to connect to the power supply equipment, and the power consumption terminal is used to connect to the power consumption equipment.
4. The circuit according to claim 1, characterized in that, The main control module is also used for: Detect whether the current charging power is equal to the target charging power; If the current charging power is not equal to the target charging power, the power detection module is controlled to adjust the charging power so that the adjusted charging power is the target charging power.
5. The circuit according to claim 1, characterized in that, The main control module is also used for: Determine the target temperature range corresponding to the current temperature value, and determine the target charging power corresponding to the target temperature range according to a preset correspondence.
6. The circuit according to claim 5, characterized in that, The preset correspondence includes a one-to-one correspondence between multiple preset temperature ranges and multiple preset charging powers.
7. The circuit according to claim 6, characterized in that, The plurality of preset temperature ranges include a first temperature range, a second temperature range, a third temperature range, and a fourth temperature range. The plurality of preset charging powers include a first preset charging power corresponding to the first temperature range, a second preset charging power corresponding to the second temperature range, a third preset charging power corresponding to the third temperature range, and a fourth preset charging power corresponding to the fourth temperature range. The first temperature range is smaller than the second temperature range, the second temperature range is smaller than the third temperature range, and the third temperature range is smaller than the fourth temperature range.
8. The circuit according to claim 7, characterized in that, The first temperature range is less than or equal to 55 degrees Celsius, the second temperature range is 56 to 65 degrees Celsius, the third temperature range is 66 to 75 degrees Celsius, and the fourth temperature range is 76 to 80 degrees Celsius.
9. The circuit according to claim 8, characterized in that, The first preset charging power is 100W, the second preset charging power is 65W, the third preset charging power is 45W, and the fourth preset charging power is 15W.
10. A charging data cable, characterized in that, Includes the charging control circuit as described in any one of claims 1 to 9.