Intelligent power supply system and charging control method

Abstract

The invention discloses an intelligent power supply system and a charging control method, and belongs to the technical field of intelligent batteries, and the intelligent power supply system comprises a power control module, a power module and a plug; the plug is connected to the input end of the power control module in parallel and used for outputting AC. The power control module is used for detecting the charging voltage, current and temperature of the plug and controlling the working state of the power module; the number of the power modules is at least two, and the input ends of the power modules are connected with the output end of the power control module and used for adjusting output power. The corresponding power modules can be automatically started through the power control module, output can be controlled, use is facilitated for users, different use environments can be adapted, the plug burning fault is avoided, meanwhile, large charging current is provided for the battery, and the charging time is shortened.

Description

Technical Field

[0001] This invention relates to the field of smart battery technology, and in particular to a smart power supply system and charging control method. Background Technology

[0002] In the current new energy vehicle industry, if the charger power is no higher than 2.2KW, only one AC 10A plug (10*220) needs to be configured; if the charger power is no higher than 3.5KW, only one AC 16A plug (16*220) needs to be configured; if the charger power is no higher than 7KW, only one AC 32A plug (32*220) needs to be configured.

[0003] In existing technology, chargers typically have only one AC-DC module and a single input terminal. Lower-power chargers may have 10A or 16A input plugs, but chargers with a rated power of 7kW or higher require a 32A input plug for operation. In areas where electrical outlets and distribution boxes only offer 10A or 16A options, chargers with a power rating of 7kW or higher will provide multiple plug options, generally including at least 16A and 32A. Users select a suitable plug based on their power supply. Because chargers offer multiple plug options, they need adjustable power to ensure compatibility between the plug and charging power. Otherwise, if the selected plug's specifications are less than the charger's charging power, the plug may burn out. Furthermore, using a smaller plug will cause the charger to reduce power output to protect the plug, thus compromising the power factor. For example, when using a 16A plug, the charging power must be adjusted to no higher than 3.5kW; when using a 32A plug, the charging power must be adjusted to no higher than 7kW. However, since there is only one input, compatibility is achieved through a plug adapter, and manual selection of the required charging level is necessary to adjust the charger's power.

[0004] In practical use, because 32A plugs are not as common as 10A and 16A plugs, especially in some homes or construction sites where power supply conditions are limited, the following problems may occur: Question 1: If the charger plug has a loose connection or the current setting is too high, causing the charging current to exceed the plug's maximum allowable current, the plug will overheat, further burning out the wiring harness connected to the charger, and ultimately burning out the charger.

[0005] Question 2: Due to the high power of the charger, if the charging level and plug selection are not appropriate on site, the charging power will be too low, which will affect the charging efficiency. Summary of the Invention

[0006] The purpose of this invention is to provide an intelligent power supply system and charging control method to automatically adjust the output power, improve charging efficiency, and meet the needs of different power consumption scenarios.

[0007] To achieve the above objectives, the present invention is implemented using the following technical solution: On one hand, the present invention provides an intelligent power supply system, including a power control module, a power module, and a plug; The plug is connected in parallel to the input terminal of the power control module and is used to output AC power. The power control module is used to detect the charging voltage, current and temperature of the plug, and to control the working status of the power module; The power module comprises at least two modules, the input terminals of which are connected to the output terminals of the power control module to adjust the output power.

[0008] Optionally, the plug is a smart plug with a temperature sensor and a rated input current of 16A, used to collect the temperature signal at the plug and transmit the temperature signal to the power control module.

[0009] Optionally, the power control module is connected to at least one plug; the power control module controls the number of power modules to be turned on according to the number of connected plugs, and automatically matches the output power according to the number of plugs used, so as to achieve the optimal charging power, shorten the charging time, and improve the charging efficiency.

[0010] Optionally, the number of plugs is equal to the number of power modules.

[0011] Optionally, the power module has a power of 3.5KW.

[0012] Secondly, the present invention also provides a charging control method for an intelligent power system, comprising: The power control module determines whether the power module is functioning properly by acquiring the charging voltage and then activates one of the power modules. Calculate the temperature rise status of each plug and determine the number of power modules to be turned on based on the temperature rise status of each plug; A temperature rise safety threshold is set, and the temperature loss status of each plug is determined based on the temperature rise safety threshold. The output power of the power module is controlled by the power control module.

[0013] Optionally, the process of determining whether the power module is functioning properly includes: The charging voltage U is obtained. When U1 ≤ U ≤ U2, the power control module determines that the power module can start and operate normally; otherwise, it outputs a fault alarm. U1 is the minimum voltage at which the power module can operate normally, and U2 is the maximum voltage at which the power module can operate normally. After startup, if the AC charging voltage U is detected to be out of range, the charger stops and reports a fault to prevent damage to the power module.

[0014] Optionally, the determination of the number of power modules to be activated includes: Obtain the initial temperature T1 of plug A1 and the initial temperature T2 of plug A2; The minimum temperature rise of the plug is set to T0 within 5 minutes. T0 is the minimum normal temperature rise of the plug when the charger starts up and operates one power module in a very low ambient temperature. This can avoid misjudgment caused by slow temperature rise due to ambient temperature. After working for 5 minutes, the temperature of plug A1 was measured as T3, and the temperature of plug A2 was measured as T4. When T3-T1≥T0 and T4-T2≥T0, it indicates that both plug A1 and plug A2 have a temperature rise, both plug A1 and plug A2 are plugged into the mains power, and the power control module starts the two power modules to work simultaneously. When T3-T1≥T0 and T4-T2<T0, it means that only plug A1 has a temperature rise, plug A1 is plugged into the mains power, plug A2 is not plugged into the mains power, and the power control module only turns on one power module. When T3-T1<T0 and T4-T2≥T0, it means that only plug A2 has a temperature rise, plug A2 is plugged into the mains power, plug A1 is not plugged into the mains power, and the power control module only turns on one power module. When T3-T1 < T0 and T4-T2 < T0, the power module fails and a charging fault is reported.

[0015] Optionally, the temperature rise safety threshold includes T 高 and Tmax; the T 高 Tmax indicates the temperature at which the plug is too hot, while Tmax indicates the maximum temperature the plug can withstand, ensuring that the plug temperature is within a controllable range and can adapt to different usage environments.

[0016] Optionally, the output power of the control power module includes: Obtain the real-time temperature feedback from plugs A1 and A2; When the plug temperatures reported by both plug A1 and plug A2 are greater than T 高 When the plug temperature is too high, the power control module reduces the output power of the power modules. Once both power modules have reduced their power to 3.5kW, one of the power modules is shut down, controlling the plug temperature to within a certain range. 高 Within the range; When the temperatures reported by plugs A1 and A2 are both greater than Tmax, it indicates that the plug temperature is abnormally high, and the intelligent power system stops charging.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: This invention provides an intelligent power system and charging control method. Through the power control module, it can automatically identify the number of plugs and activate the corresponding power modules to control the output, making it convenient for users and adaptable to different usage environments, thus avoiding plug burnout. At the same time, based on power conditions, it activates as many charging power modules as possible to provide a larger charging current to the battery and shorten charging time. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the intelligent power supply system structure of the present invention; Figure 2 This is a flowchart illustrating the startup process of the charger of this invention. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Example 1:

[0020] This embodiment introduces an intelligent power supply system. Firstly, the charger body internally contains two independent power modules and a power control module. The plug is connected in parallel to the input terminal of the power control module for outputting AC power. The power control module detects the plug's charging voltage, current, and plug temperature, and controls the operation of the two power modules according to the required parameters. A schematic diagram is shown below. Figure 1 As shown; The input terminals of the power module are connected to the output terminals of the power control module to adjust the output power.

[0021] The plug is a smart plug with a temperature sensor and a rated input current of 16A. It is used to collect the temperature signal at the plug and transmit the temperature signal to the power control module.

[0022] The power control module is connected to at least one plug; the power control module controls the number of power modules to be turned on according to the number of connected plugs, and automatically matches the output power according to the number of plugs used to achieve the optimal charging power, shorten the charging time, and improve the charging efficiency.

[0023] The number of plugs is equal to the number of power modules.

[0024] The power module has a power of 3.5KW. Example 2:

[0025] This embodiment describes a charging control method for an intelligent power system, including: The power control module determines whether the power module is normal by acquiring the charging voltage. Only when the input voltage is within the required range can the entire power module start up and work normally. After determining that the power module is normal, one power module is turned on. The process of determining whether the power module is functioning properly includes: The charging voltage U is obtained. When U1 ≤ U ≤ U2, the power control module determines that the power module can start and operate normally; otherwise, it outputs a fault alarm. U1 is the minimum voltage at which the power module can operate normally, and U2 is the maximum voltage at which the power module can operate normally. After startup, if the AC charging voltage U is detected to be out of range, the charger stops and reports a fault to prevent damage to the power module.

[0026] Calculate the temperature rise status of each plug and determine the number of power modules to be turned on based on the temperature rise status of each plug; like Figure 2 As shown, the process of determining the number of power modules that are turned on includes: Obtain the charging voltage, the initial temperature T1 of plug A1, and the initial temperature T2 of plug A2; The minimum temperature rise of the plug is set to T0 within 5 minutes. T0 is the minimum normal temperature rise of the plug when the charger operates a power module in a very low ambient temperature environment. This can avoid misjudgment caused by slow temperature rise due to ambient temperature. After a power module has been working for 5 minutes, the temperature of plug A1 is measured as T3, and the temperature of plug A2 is measured as T4. When T3-T1≥T0 and T4-T2≥T0, it indicates that both plug A1 and plug A2 have a temperature rise, both plug A1 and plug A2 are plugged into the mains power, and the power control module starts the two power modules to work simultaneously. When T3-T1≥T0 and T4-T2<T0, it means that only plug A1 has a temperature rise, plug A1 is plugged into the mains power, plug A2 is not plugged into the mains power, and the power control module only turns on one power module.

[0027] When T3-T1<T0 and T4-T2≥T0, it means that only plug A2 has a temperature rise, plug A2 is plugged into the mains power, plug A1 is not plugged into the mains power, and the power control module only turns on one power module.

[0028] When T3-T1 < T0 and T4-T2 < T0, the power module fails and a charging fault is reported.

[0029] A temperature rise safety threshold is set, and the temperature loss status of each plug is determined based on the temperature rise safety threshold. The output power of the power module is controlled by the power control module.

[0030] The output power of the control power module includes: Set the safe threshold for temperature rise, respectively, T 高 And Tmax, where Tmax is the maximum temperature the plug can withstand; Obtain the real-time temperature feedback from plugs A1 and A2; When the plug temperatures reported by both plug A1 and plug A2 are greater than T 高 When the plug temperature is too high, the power control module reduces the output power of the power modules. Once both power modules have reduced their power to 3.5kW, one of the power modules is shut down, controlling the plug temperature to within a certain range. 高 Within the range; When the temperatures reported by plugs A1 and A2 both exceed Tmax, it indicates that the plug temperature is abnormally high and the plug is about to burn out, at which point the intelligent power system stops charging.

[0031] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An intelligent power supply system, characterized in that, Includes a power control module, a power module, and a connector; The plug is connected in parallel to the input terminal of the power control module and is used to output AC power. The power control module is used to detect the charging voltage, current and temperature of the plug, and to control the working status of the power module; The power module comprises at least two modules, the input terminals of which are connected to the output terminals of the power control module to adjust the output power.

2. The intelligent power supply system according to claim 1, characterized in that, The plug is a smart plug with a temperature sensor and a rated input current of 16A. It is used to collect the temperature signal at the plug and transmit the temperature signal to the power control module.

3. The intelligent power supply system according to claim 1, characterized in that, The power control module is connected to at least one plug; the power control module controls the number of power modules that are turned on according to the number of connected plugs.

4. The intelligent power supply system according to claim 1, characterized in that, The number of plugs is equal to the number of power modules.

5. The intelligent power supply system according to claim 1, characterized in that, The power module has a power of 3.5KW.

6. A charging control method for an intelligent power system, characterized in that, include: The power control module determines whether the power module is functioning properly by acquiring the charging voltage and then activates one of the power modules. Calculate the temperature rise status of each plug and determine the number of power modules to be turned on based on the temperature rise status of each plug; A temperature rise safety threshold is set, and the temperature loss status of each plug is determined based on the temperature rise safety threshold. The output power of the power module is controlled by the power control module.

7. The intelligent power system charging control method according to claim 6, characterized in that, The process of determining whether the power module is functioning properly includes: The charging voltage U is obtained. When U1≤U≤U2, the power control module determines that the power module can start and work normally; otherwise, it outputs a fault alarm. U1 is the minimum voltage at which the power module can work normally, and U2 is the maximum voltage at which the power module can work normally.

8. The intelligent power system charging control method according to claim 6, characterized in that, The number of power modules that are activated includes: Obtain the initial temperature T1 of plug A1 and the initial temperature T2 of plug A2; The minimum temperature rise of the plug is set to T0 after 5 minutes of operation. After 5 minutes of operation, the temperature of plug A1 is measured as T3 and the temperature of plug A2 is measured as T4. When T3-T1≥T0 and T4-T2≥T0, it indicates that both plug A1 and plug A2 have a temperature rise, both plug A1 and plug A2 are plugged into the mains power, and the power control module starts the two power modules to work simultaneously. When T3-T1≥T0 and T4-T2<T0, it means that only plug A1 has a temperature rise, plug A1 is plugged into the mains power, plug A2 is not plugged into the mains power, and the power control module only turns on one power module. When T3-T1<T0 and T4-T2≥T0, it means that only plug A2 has a temperature rise, plug A2 is plugged into the mains power, plug A1 is not plugged into the mains power, and the power control module only turns on one power module. When T3-T1 < T0 and T4-T2 < T0, the power module fails and a charging fault is reported.

9. The intelligent power system charging control method according to claim 6, characterized in that, The temperature rise safety threshold includes T 高 and Tmax; the T 高 Tmax indicates the temperature at which the plug is at a relatively high temperature, while Tmax indicates the maximum temperature the plug can withstand.

10. The intelligent power system charging control method according to claim 9, characterized in that, The output power of the control power module includes: Obtain the real-time temperature feedback from plugs A1 and A2; When the plug temperatures reported by both plug A1 and plug A2 are greater than T 高 When the plug temperature is too high, the power control module reduces the output power of the power modules and shuts down one of the power modules. When the temperatures reported by plugs A1 and A2 are both greater than Tmax, it indicates that the plug temperature is abnormally high, and the intelligent power system stops charging.

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