Alternating current charger and charging method thereof
By using voltage signals in an AC charger for identification and power limiting, the problem of charging power matching in high-altitude environments is solved, and the outputs at different altitudes are automatically adapted to, ensuring the normal operation of the power generation department.
Patent Information
- Application Number
- CN202311646302.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-04
- Publication Date
- 2025-06-06
AI Technical Summary
The existing AC chargers cannot automatically match charging powers that are adapted to different altitudes in high altitude environments, resulting in the collapse of the fuel generator and the normal output is not possible.
The identification unit uses voltage signals to determine whether the power supply to the power generation unit or the mains power supply, and limits the charging power according to the initial maximum charging power value at different altitudes, so as to achieve adaptive matching under no communication protocol.
It realizes automatic matching of adaptive charging power in different altitude environments, ensures the normal output of the power generation department, and promotes the popularization and promotion of products.
Smart Images
Figure CN120109939A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to an AC charger, and in particular to an AC charger capable of adaptively matching a charging power source and a charging method thereof. Background Art
[0002] The popularity of energy storage power supplies has promoted the popularization of energy storage lithium batteries; fuel generators, as one of the most commonly used backup power supplement equipment, are widely used in base stations, trucks, RVs, agricultural drones and other segments.
[0003] Since the core working part of the fuel generator is the internal combustion engine, which generates kinetic energy through fuel combustion and eventually converts it into electrical energy, and the power output of the internal combustion engine will be affected by the environment such as altitude / air pressure, the output power of the same generator will be greatly reduced when used at high altitudes. If the generator is used as a backup charging power source, the charging power needs to be limited accordingly when used at high altitudes to prevent the fuel generator from overloading and causing it to fail to output normally. In the sub-sectors of agricultural drone charging, truck backup charging, RV backup power supply, etc., because the user's usage location will change dynamically, the method of on-site adjustment of the maximum charging power by the installation engineer cannot meet the user's actual usage needs.
[0004] To solve this problem, the current solution is to limit the charging power by communicating with the battery or power supply. This solution requires the addition of corresponding RS485 communication or CAN communication protocols in the generator set, and can only be developed for customized charging products for customized users; the generator set and charging power supply or battery end of the customized product need to be adjusted synchronously with software and hardware, and synchronize the communication protocol, which is not conducive to the popularization and promotion of the product. However, ordinary general-purpose AC generator sets do not have external communication functions, and ordinary AC charging power supplies also do not have external communication functions, so the two cannot automatically match normally to adapt to different altitudes. Summary of the invention
[0005] The present invention provides an AC charger without a communication protocol and capable of adaptively matching with a charging power source, comprising a power unit, a power generation unit and a charging unit, wherein the power unit and the power generation unit are connected; It also includes an identification unit connected to a charging power source, in which the initial maximum charging power values allowed at different altitudes are preset; the identification unit identifies the charging power source, and when it is identified that the charging power source is municipal power, the charging power is not limited; when it is identified that the charging power source is a power generation unit, the identification unit also identifies the current area and limits the current charging power according to the initial maximum charging power value allowed at the corresponding altitude.
[0006] Compared with the prior art, in this solution, a voltage signal is used to determine whether the power supply is from the power generation unit or the mains power supply, thereby realizing adaptive matching of the charger and the charging power supply without a communication protocol, which is beneficial to the popularization and promotion of the product; and when it is determined that the power supply is from the power generation unit, the charging power is restricted accordingly, thereby ensuring the normal output of the power generation unit, and being able to automatically match the output to suit different altitudes, thereby ensuring that the product can be used normally at different altitudes.
[0007] Preferably, the recognition unit is also preset with a voltage difference threshold value. When the recognition unit performs recognition, the input voltage V x Identify the voltage V when the charging unit is unloaded x-空载 With the current stable charging power voltage V x-充电 When the voltage difference |V| between them is not less than the voltage difference threshold, it is determined that the power is supplied by the power generation unit, otherwise it is determined that the power is supplied by the mains. Considering that compared with the generator, the input voltage difference of the mains during the charging process is relatively small, the voltage difference is used in this scheme to determine whether the power is supplied by the power generation unit or the mains, which has a simple structure.
[0008] Preferably, the recognition unit is also preset with a voltage threshold. When the recognition unit recognizes the input voltage V x When the voltage is less than the threshold, the current charging power P0 is actively reduced. When the input voltage V x When the voltage is higher than the threshold, the current power is used as the maximum charging power allowed for this time to control charging. This solution also calibrates according to the input voltage to ensure the normal output of the power generation unit.
[0009] Preferably, the charging power source is re-identified after the identification unit is powered on again. Considering that the charging power source may change after powering on again, the re-identification after powering on in this solution can ensure the accuracy of the charging power source identification, so as to ensure the correct matching of the charger and the charging power source.
[0010] Preferably, the power generation unit is preset with an overload threshold, and when the power unit or the power generation unit is in an overload state, the power generation unit adjusts the output voltage down to the overload threshold. This solution can ensure normal output.
[0011] Preferably, the power unit or the power generation unit is provided with a monitoring module for monitoring its own parameters, and determines whether the current working state is overloaded or normal according to the monitored parameters.
[0012] Preferably, when it is determined that the power unit or the generator has returned to a normal state, the power generation unit adjusts the output voltage up to V x-充电 .
[0013] In a second aspect, the present invention provides a charging method for an AC charger, using any of the above AC chargers for charging. During charging, an identification unit is used to identify the charging power source. When the charging power source is identified as municipal power, the charging power is not limited. When the charging power source is identified as a power generation unit, the identification unit also identifies the current area and limits the current charging power according to the initial maximum charging power value allowed at the corresponding altitude.
[0014] The present invention has the following beneficial effects: the present invention adopts voltage signals for identification and judgment, the AC charging power supply adopts voltage signals to identify whether it is powered by a generator or a mains power supply, and the voltage signal is used to determine the current maximum allowable output power of the generator, and can realize adaptive matching of the charging power supply under the communication protocol, which is conducive to the popularization and promotion of the product, and can also automatically match the output adapted to different altitudes, ensuring that the product can be used normally at different altitudes. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 A flowchart of an identification process in an embodiment of an AC charger and a charging method thereof of the present invention; Figure 2 FIG. 4 is a flow chart of charging power calibration in an embodiment. DETAILED DESCRIPTION
[0016] The following is further described in detail through specific implementation methods: 1. Definition Mains electricity: that is, industrial frequency alternating current (AC), generally 220V.
[0017] 2. The embodiment is basically as shown in the attached Figure 1 and Figure 2 As shown: an AC charger includes a power unit, a power generation unit, a charging unit and an identification unit for connecting to a charging power source, and the power unit and the power generation unit are connected.
[0018] The identification unit is preset with the initial maximum charging power value and voltage difference threshold allowed at different altitudes; the identification unit identifies the charging power source and re-identifies the charging power source after the identification unit is powered on again. Specifically, the identification unit identifies the input voltage V x Identify the voltage V when the charging unit is unloaded x-空载 With the current stable charging power voltage V x-充电 When the voltage difference |V| between them is not less than the voltage difference threshold, it is determined that the power supply is from the power generation unit; otherwise, it is determined that the power supply is from the mains. Figure 1 As shown. Taking 220V as an example, the corresponding V x-空载 230V, V x-充电 is 220V, the voltage difference |V| is 7V. The power generation unit is a generator.
[0019] When the charging power source is identified as AC power, the charging power is not limited. When the charging power source is identified as a power generation unit, the identification unit also identifies the current area and limits the current charging power according to the initial maximum charging power value allowed at the corresponding altitude.
[0020] The power unit or power generation unit is preset with an overload threshold. The power unit or power generation unit is equipped with a monitoring module to monitor its own parameters and determine whether the current working state is overloaded or normal based on the monitored parameters. When the power unit or power generation unit is in an overload state, the power generation unit adjusts the output voltage down to the overload threshold. When it is determined that the power unit or generator has returned to normal, the power generation unit adjusts the output voltage up to V x-充电 In this embodiment, the overload threshold is set to 213V.
[0021] The recognition unit also presets a voltage threshold. When the recognition unit recognizes the input voltage V x When the voltage is less than the threshold, the current charging power P0 is actively reduced. When the input voltage V x When the voltage is higher than the threshold, the current power is used as the maximum charging power allowed for this time to control charging. Figure 2 In this embodiment, the voltage threshold is set to 218V, and the reduced preset charging power is 100W.
[0022] Based on the above-mentioned AC charger, this embodiment also provides a charging method for an AC charger. During charging, an identification unit is used to identify the charging power source. When the charging power source is identified as AC power, the charging power is not limited. When the charging power source is identified as a power generation unit, the identification unit also identifies the current area and limits the current charging power according to the initial maximum charging power value allowed at the corresponding altitude.
[0023] Specific implementation process: The AC charger in this embodiment uses the identification unit to identify the charging power source during the charging process. Taking the domestic mains 220V state as an example, the no-load voltage of the generator is set to 230V, the rated voltage of the generator is set to 220V, and the overload voltage of the generator is set to 215V; and during the charging process of the mains, the input voltage difference is relatively small; the identification unit of the AC charger compares the voltage value identified at the initial charging stage with the voltage value after reaching the rated charging power, and determines that the voltage difference is ≥7V as generator power supply, and the voltage difference is <7V as mains power supply; when the mains power is supplied, the charging power is not limited; when the generator power is supplied, after the generator voltage reaches the overload voltage trigger value, for example, when the voltage is determined to be lower than 218V, the charging power will no longer be increased, and this will be used as the maximum charging power limit value allowed in the current area.
[0024] In order to reduce the error in the maximum allowable output power determination process and improve the reliability of determination, the initial maximum charging power value allowed at different altitudes is preset in the identification unit for preliminary calibration. Taking the domestic mains 220V state as an example, the maximum power value allowed at different altitudes is preset inside the identification unit. When the identification unit can identify the altitude, the maximum charging power is limited to the preset value after power is turned on, and the voltage value of the AC charger is calibrated during the charging process. For example, when the generator voltage is lower than 218V during the charging process, the charging power is actively reduced by 100W and recorded and stored to avoid the AC charger from overloading; the identification unit is re-judged and identified after power is turned off.
[0025] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. An AC charger, comprising a power unit, a power generation unit and a charging unit, wherein the power unit and the power generation unit are connected; Features: It also includes an identification unit connected to a charging power source, in which the initial maximum charging power values allowed at different altitudes are preset; the identification unit identifies the charging power source, and when it is identified that the charging power source is municipal power, the charging power is not limited; when it is identified that the charging power source is a power generation unit, the identification unit also identifies the current area and limits the current charging power according to the initial maximum charging power value allowed at the corresponding altitude.
2. The AC charger according to claim 1, Features: The recognition unit is also preset with a voltage difference threshold value. When the recognition unit performs recognition, the input voltage V x Identify the voltage V when the charging unit is unloaded x-空载 With the current stable charging power voltage V x-充电 The voltage difference between When the voltage difference is not less than the voltage difference threshold, it is determined that the power generation unit is supplying power, otherwise it is determined that the power supply is from the mains.
3. The AC charger according to claim 2, Features: The recognition unit is also preset with a voltage threshold. When the recognition unit recognizes the input voltage V x When the voltage is less than the threshold, the current charging power P0 is actively reduced. When the input voltage V x When the voltage is higher than the threshold, the current power is used as the maximum charging power allowed for this time and charging control is performed.
4. The AC charger according to claim 3, Features: The charging power source is re-identified after the identification unit is powered on again.
5. The AC charger according to claim 4, Features: The power generation unit is preset with an overload threshold. When the power unit or the power generation unit is in an overload state, the power generation unit adjusts the output voltage down to the overload threshold.
6. The AC charger according to claim 5, Features: The power unit or the power generation unit is provided with a monitoring module for monitoring its own parameters, and determines whether the current working state is overloaded or normal according to the monitored parameters.
7. The AC charger according to claim 4 or 5, Features: When it is determined that the power unit or generator has returned to a normal state, the power generation unit increases the output voltage to V x-充电 .
8. A charging method for an AC charger, Features: The AC charger according to any one of claims 1 to 7 is used for charging. During charging, the charging power source is identified by an identification unit. When the charging power source is identified as AC power, the charging power is not limited. When the charging power source is identified as a power generation unit, the identification unit further identifies the current area and limits the current charging power according to the initial maximum charging power value allowed at the corresponding altitude.