WO2016206631A1 - Appareil et procédé de surveillance de charge sans fil, et appareil de charge sans fil - Google Patents

Appareil et procédé de surveillance de charge sans fil, et appareil de charge sans fil Download PDF

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Publication number
WO2016206631A1
WO2016206631A1 PCT/CN2016/087085 CN2016087085W WO2016206631A1 WO 2016206631 A1 WO2016206631 A1 WO 2016206631A1 CN 2016087085 W CN2016087085 W CN 2016087085W WO 2016206631 A1 WO2016206631 A1 WO 2016206631A1
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WIPO (PCT)
Prior art keywords
wireless charging
temperature
preset
charging device
wireless
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PCT/CN2016/087085
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English (en)
Chinese (zh)
Inventor
刘芳世
董永明
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苏州宝时得电动工具有限公司
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Publication of WO2016206631A1 publication Critical patent/WO2016206631A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0091—

Definitions

  • the present invention relates to the field of wireless charging technologies, and in particular, to a wireless charging monitoring device, and to a wireless charging monitoring method, and a wireless charging device.
  • the charging power is relatively small, the amount of heat generation is low, and the temperature is not regulated. Therefore, when the wireless charging power is large, the heat generation is large, the temperature rise in the wireless charging device is fast, the device damage is easily caused, and even a safety accident is caused, and the safety of the wireless charging process cannot be ensured.
  • a wireless charging monitoring device for monitoring a charging process of a wireless charging device, comprising: a temperature detecting module for detecting a temperature of the wireless charging device in real time; and a frequency detecting module for detecting the wireless charging device in real time a charging state detecting module, configured to detect a charging state parameter of the wireless charging device in real time; and a control module respectively connected to the temperature detecting module, the frequency detecting module, and the charging state detecting module, Determining whether the charging state of the wireless charging device is balanced with the temperature according to the charging state parameter and the temperature; the control module is further configured to determine that the charging state of the wireless charging device is not the temperature And during the balancing, the frequency adjustment command is generated according to the charging state parameter and the temperature; and an execution module is connected to the control module, configured to adjust an operating frequency of the wireless charging device according to the frequency adjustment command to implement Adjusting the state of charge parameter to cause the wireless charging Opposed to the state of charge of the equilibrium temperature.
  • the temperature detecting module is disposed on a circuit board of the wireless charging device to detect the temperature of the circuit board in real time.
  • control module determines whether the state of charge of the wireless charging device is balanced with the temperature by determining whether the temperature is equal to a preset temperature, and if so, indicating the state of charge and the temperature Phase equilibrium; if otherwise indicating that the state of charge is not balanced with the temperature.
  • the determining module when determining the charging state of the wireless charging device and the temperature imbalance, according to the charging state parameter and the temperature generating frequency adjustment instruction, specifically includes: the controlling The module is further configured to determine whether the temperature is less than the preset temperature, and generate a frequency adjustment instruction for reducing the frequency when the temperature is less than a preset value; the control module is further configured to be at the temperature A frequency adjustment command for increasing the frequency is generated when the preset temperature is greater than the preset temperature.
  • the method further includes: a heat dissipation module connected to the control module; the control module is further configured to generate a startup heat dissipation command and output the heat dissipation module to the heat dissipation module when the temperature is greater than the preset temperature; The heat dissipation module is configured to start heat dissipation of the wireless charging device according to the startup heat dissipation command.
  • control module is further configured to determine whether the temperature is greater than a threshold temperature, and generate a shutdown command to the wireless charging device when the temperature is greater than a threshold temperature, and control the wireless charging device to stop Charging.
  • a wireless charging device is also provided.
  • a wireless charging device including a wireless charging coil, further comprising the wireless charging monitoring device of any of the foregoing embodiments.
  • a wireless charging monitoring method is also provided.
  • a wireless charging monitoring method for monitoring a charging process of a wireless charging device includes the steps of: detecting a temperature of the wireless charging device in real time; detecting an operating frequency of the wireless charging device in real time; detecting the wireless charging in real time; a charging state parameter of the device; determining, according to the charging state parameter and the temperature, whether the wireless charging state is balanced with the temperature; if not, generating a frequency adjustment command according to the charging state parameter and the temperature; The frequency adjustment command adjusts the frequency to achieve adjustment of the state of charge parameter such that a state of charge of the wireless charging device is balanced with the temperature.
  • the step of determining whether the wireless charging state is balanced with the temperature according to the charging state parameter and the temperature is specifically: determining whether the temperature is equal to The preset temperature, if so, the wireless state of charge is balanced with the temperature.
  • the step of determining whether the wireless charging state is balanced with the temperature according to the charging state parameter and the temperature determines that the wireless charging state and the temperature are unbalanced And performing the steps of: determining whether the temperature is less than the preset temperature; if yes, generating a frequency adjustment instruction for reducing the frequency; if the temperature is greater than the preset temperature, generating for increasing The frequency adjustment command of the frequency.
  • the present invention also provides another wireless charging monitoring method for monitoring a process of charging a wireless charging device to an energy storage device, comprising the steps of: acquiring a temperature of the wireless charging device; and adjusting a charging state of the wireless charging device according to the temperature.
  • the step of adjusting the state of charge of the wireless charging device according to the temperature comprises the following substeps: determining whether the rate of temperature rise exceeds a first preset rate; when the rate of temperature rise exceeds a first predetermined rate And reducing the charging power of the wireless charging device according to the first preset algorithm.
  • the first preset algorithm is to adjust a rate or a reduced value of the charging power reduction of the wireless charging device according to the rate of the temperature rise.
  • the step of adjusting the charging state of the wireless charging device according to the temperature comprises the following substeps: determining whether the temperature exceeds a first preset temperature; when the temperature exceeds a first preset temperature, according to a second preset
  • the algorithm reduces the charging power of the wireless charging device.
  • the second preset algorithm is to adjust a rate or a reduced value of the charging power reduction of the wireless charging device according to the difference between the temperature and the first preset temperature.
  • the second preset temperature is higher than the first preset temperature, when the temperature exceeds
  • the second method of lowering the charging power of the wireless charging device is to reduce the charging power of the wireless charging device to less than 10% of the rated charging power.
  • the wireless charging monitoring method further includes the step of controlling the wireless charging device to alert the operator.
  • the specific step of controlling the wireless charging device to alert the operator is: providing an alarm module that alerts the operator, the alarm module is disposed at the wireless charging receiving end of the wireless charging device, and is electrically connected to the energy storage device sexual connection; when the charging power is detected to be less than 10% of the rated charging power, The wireless alarm module alerts the operator.
  • the wireless charging monitoring method further includes the steps of: acquiring a temperature of the wireless charging device; determining whether the temperature is low The third preset temperature is lower than the second preset temperature at the third preset temperature; when the determination result is YES, the charging power of the wireless charging device is increased.
  • the specific step of obtaining the temperature of the wireless charging device is: providing a temperature detecting module for detecting the temperature, setting the temperature detecting module to a heat collecting region in the wireless charging device, and acquiring a signal transmitted by the temperature detecting module.
  • the heat accumulation region is a surface of the power device.
  • the wireless charging device charges the energy storage device with the rated charging power.
  • the wireless charging monitoring method further comprises the step of: detecting wireless charging The charging state of the device sets the value of the first preset temperature or the value of the first preset rate according to the charging state of the wireless charging device.
  • the present invention further provides another wireless charging monitoring device for monitoring a process of charging a wireless charging device to an energy storage device, comprising: a temperature detecting module, detecting a temperature of the wireless charging device; a control module, and the temperature detecting module Electrically connecting, according to a signal transmitted by the temperature detecting module, issuing an instruction for adjusting a charging power of the wireless charging device; and executing an module, connecting with the control module, and performing charging state of the wireless charging device according to an instruction of the control module Adjustment.
  • control module determines whether the rate of the temperature rise exceeds a first preset rate, and when the rate of the temperature rise exceeds the first preset rate, the charging of the wireless charging device is reduced according to the first preset algorithm. Power instruction.
  • the first preset algorithm is to adjust a rate or a reduced value of the charging power reduction of the wireless charging device according to the rate of the temperature rise.
  • control module determines whether the temperature exceeds a first preset temperature, and when the determination result is yes, issues an instruction to reduce the charging power of the wireless charging device according to the second preset algorithm.
  • the second preset algorithm adjusts according to the difference between the temperature and the first preset temperature.
  • control module determines that the temperature exceeds the first preset temperature, further determining whether the temperature exceeds a second preset temperature, and the second preset temperature is greater than the first preset temperature, when determining When the result is YES, an instruction to reduce the charging power of the wireless charging device to 10% or less of the rated power is issued.
  • the wireless charging monitoring device further includes an alarm module, and the alarm module alerts the operator when the control module determines that the temperature exceeds the second preset temperature.
  • the alarm module is disposed at a wireless charging receiving end of the wireless charging device, and is electrically connected to the energy storage device; the alarm module detects that the charging power of the wireless charging device is reduced to 10% of the rated charging power.
  • the operator is alerted as follows.
  • the control module acquires the temperature of the wireless charging device by the temperature detecting module, and determines whether the temperature is Below the third preset temperature, the third preset temperature is lower than the second preset temperature, and when the determination result is YES, an instruction to increase the charging power of the wireless charging device is issued.
  • the temperature detecting module is disposed in a heat accumulation area in the wireless charging device.
  • the heat accumulation region is a surface of the power device.
  • control module sends an instruction to charge the rated charging power of the wireless charging device when the temperature does not exceed the first preset temperature or the rate at which the temperature rises does not exceed the first preset rate.
  • the wireless charging monitoring device further includes a charging state detecting module, wherein the charging state detecting module detects a charging state of the wireless charging device, and transmits the detection result to the control module, where the control module transmits according to the charging state detecting module.
  • the charging state detecting module detects a charging state of the wireless charging device, and transmits the detection result to the control module, where the control module transmits according to the charging state detecting module.
  • the wireless charging monitoring device further includes a heat dissipation module connected to the control module; the control module is further configured to: when the temperature is greater than the first preset temperature or the temperature rises, the rate exceeds the first preset
  • the heat dissipation command is generated and output to the heat dissipation module, and the heat dissipation module is configured to start heat dissipation of the wireless charging device according to the startup heat dissipation command.
  • the invention also provides a wireless charging device, the wireless charging device comprising a wireless transmitting coil, A wireless receiving coil, and a wireless charging monitoring device as previously described.
  • the wireless charging monitoring device and method can monitor the temperature during charging of the wireless charging device, and adjust the charging state parameter by adjusting the operating frequency of the wireless charging device when the temperature and the charging state are unbalanced, thereby implementing wireless charging.
  • the balance between state and temperature effectively improves the safety of the wireless charging process.
  • FIG. 1 is a circuit block diagram of a wireless charging monitoring apparatus of a first preferred embodiment
  • FIG. 2 is a flow chart of a first preferred embodiment of the wireless charging monitoring device in the embodiment shown in FIG. 1;
  • FIG. 3 is a flow chart of a second preferred embodiment of the wireless charging monitoring device in the embodiment shown in FIG. 1;
  • FIG. 4 is a circuit block diagram of a wireless charging monitoring apparatus of a second preferred embodiment
  • FIG. 5 is a flow chart of a first preferred embodiment of the wireless charging monitoring device in the embodiment shown in FIG. 4;
  • FIG. 6 is a flow chart of a second preferred embodiment of the wireless charging monitoring device in the embodiment shown in FIG. 4;
  • FIG. 7 is a schematic diagram of a wireless charging device charging a battery pack of a power tool.
  • a wireless charging monitoring device monitors a process in which a wireless charging device charges a stored energy device.
  • the wireless charging device 100 includes a wireless charging transmitter 700 and a wireless charging receiver.
  • the wireless charging transmitter 700 of the wireless charging device 100 includes an AC-DC module 702 that is coupled to an AC power source, an execution module 750, a control module 740, a temperature detection module 710, and a wireless transmit coil 704 that is coupled to the execution module.
  • the wireless charging receiving end of the wireless charging device 100 includes a wireless receiving coil 772 and a charging management module 774 housed in the energy storage device 770.
  • the charge management module 774 is coupled to the energy storage unit 776 in the energy storage device 770 to charge and manage it.
  • the AC-DC module converts the external AC power into DC power; the execution module 750, the control module 740, and the temperature detection module 710 form a wireless charging monitoring device to monitor the charging process of the wireless charging device 100.
  • the energy storage device 770 is a battery pack that can supply power to different power tools.
  • the energy storage unit 776 is a battery cell within the battery pack.
  • the battery pack is non-removably built into the power tool; in another embodiment, the battery pack is relatively The power tool is detachably mounted to power different power tools.
  • the wireless charging device may also not include an AC-DC module.
  • the wireless charging device 100 provided by the present invention may alternatively include any of the wireless charging monitoring devices mentioned in FIGS. 1 to 7 and the specification of the present invention and operate any monitoring method corresponding to the wireless charging monitoring device. .
  • FIG. 1 is a circuit block diagram of a wireless charging monitoring device in an embodiment, including a temperature detecting module 110, a frequency detecting module 120, a charging state detecting module 130, a control module 140, an executing module 150, and a heat dissipation module 160.
  • the temperature detecting module 110 is configured to perform real-time detection of the temperature of the wireless charging device during wireless charging.
  • the temperature detecting module 110 is mainly used to detect the temperature of the wireless charging coil and the power device in the wireless charging device 160 in real time and output a temperature value.
  • the temperature detecting module 110 includes a temperature sensor mounted on the circuit board of the wireless charging device to test the overall temperature of the circuit board and output the detected temperature T to the control module 140.
  • the frequency detecting module 120 is configured to perform real-time detection on the operating frequency of the wireless charging device during wireless charging and output the detected frequency F to the control module 140.
  • the charging state detecting module 130 is configured to detect and output the charging state parameter of the wireless charging device during the wireless charging process to the control module 140.
  • the charging state detecting module 130 is mainly used to detect and output the charging current and the charging voltage during the wireless charging process.
  • the control module 140 is connected to the temperature detecting module 110, the frequency detecting module 120, and the charging state detecting module 130, respectively.
  • the control module 140 is configured to determine whether the charging state of the wireless charging device is balanced with the temperature T according to the received charging state parameter and the temperature T. Specifically, the control module 140 determines whether the charging state of the wireless charging device and the temperature are balanced by determining whether the temperature is equal to the preset temperature T1.
  • the preset temperature T1 is the temperature allowed by the wireless charging device in the current wireless charging state. Therefore, it can be determined according to the wireless charging device and the wireless charging state, and is not limited to a certain determined value.
  • the control module 140 determines that the current state of charge is balanced with the temperature, the control module 140 does not perform an additional control operation, and continues to perform the detection of the state of charge, the temperature T, and the frequency F of the wireless charging device.
  • the control module 140 determines that the current state of charge and the temperature T are unbalanced, the control module 140 is based on the state of charge. Parameters and temperature generation frequency adjustment instructions. Specifically, the control module 140 further determines whether the temperature T is less than the preset temperature T1. The control module 140 generates a frequency adjustment command for reducing the frequency F when the temperature T is less than the preset temperature T1. The specific adjustment range needs to be determined according to the charging state parameter value and the current temperature T and the current frequency F. When the control module 140 determines that the temperature T is greater than the preset temperature T1, it further determines whether the temperature T is greater than the threshold temperature T2, that is, whether the difference between the temperature T and the preset temperature T1 is greater than a preset amplitude.
  • control module 140 determines that the temperature T is greater than the threshold temperature T2, it generates a shutdown command to the wireless charging device, and controls the wireless charging device to stop charging.
  • the control module 140 determines that the temperature T is less than the threshold temperature T2 and greater than the preset temperature T1, the control module 140 generates a frequency adjustment command for increasing the frequency F, and generates a startup heat dissipation command.
  • the execution module 150 is connected to the control module 140 for receiving the frequency adjustment command output by the control module 140, so as to adjust the operating frequency of the wireless charging device to adjust the charging state parameter, such as the charging current, so that the charging state of the wireless charging device Balanced with temperature T to ensure that wireless charging can proceed normally, improving the security of the wireless charging process.
  • the heat dissipation module 160 is connected to the control module 140 for receiving an open heat dissipation command of the output thereof, and is configured to turn on heat dissipation under the control of the command to reduce the temperature of the wireless charging device and promote the charging state between the wireless charging device and the temperature T. balance.
  • the wireless charging monitoring device can monitor the temperature during charging of the wireless charging device, and adjust the charging state parameter by adjusting the operating frequency of the wireless charging device when the temperature and the charging state are unbalanced, thereby implementing the wireless charging state and The balance between temperatures effectively improves the safety of the wireless charging process. Moreover, in the process of adjusting the charging state of the wireless charging device by adjusting the frequency, it can adjust the output power of the wireless charging device, but does not reduce the efficiency of the wireless charging process, thereby making the wireless charging process The charging efficiency is high.
  • the present invention also provides a wireless charging device comprising a wireless charging coil, and further comprising the wireless charging monitoring device of the previous embodiment.
  • the wireless charging device can be a wireless charging receiver or a wireless charging transmitter.
  • the above wireless charging device can improve the safety of the charging process through the wireless charging monitoring device, and has high charging efficiency.
  • the invention also provides a wireless charging monitoring method for monitoring a charging process of a wireless charging device.
  • the flow of the wireless charging monitoring method is as shown in FIG. 2, and includes the following steps.
  • the temperature detection process mainly detects the temperature of the wireless charging coil and the power device in the wireless charging device.
  • the temperature of the entire board is tested and the temperature T is output by mounting the temperature sensor on the circuit board of the wireless charging device.
  • steps S210 and S220 are performed synchronously, and are repeatedly performed throughout the wireless charging process.
  • Step S230 and S210, S220 are both performed synchronously, and are also repeatedly executed throughout the wireless charging process.
  • charging state parameters such as charging current and charging voltage are mainly detected.
  • Whether the state of charge and the temperature T are balanced are determined based on the detected state of charge parameter and the temperature. Specifically, it is determined whether the temperature T is equal to the preset temperature T1. If they are equal, the two are balanced. After the frequency F is not adjusted, the process returns to the steps S210, S220, and S230. If the two are not balanced, step S250 is performed.
  • the frequency adjustment command is used to adjust the operating frequency of the wireless charging device.
  • the frequency F is adjusted according to the generated frequency adjustment command, thereby adjusting the charging state parameter, so that the charging state of the wireless charging device is balanced with the temperature to ensure safe and stable wireless charging process.
  • the wireless charging monitoring method can monitor the temperature during charging of the wireless charging device, and adjust the charging state parameter by adjusting the working frequency of the wireless charging device when the temperature and the charging state are unbalanced, thereby implementing the wireless charging state and The balance between temperatures effectively improves the safety of the wireless charging process. Moreover, in the process of adjusting the charging state of the wireless charging device by adjusting the frequency, it can adjust the output power of the wireless charging device, but does not reduce the efficiency of the wireless charging process, thereby making the wireless charging process The charging efficiency is high.
  • FIG. 3 is a flow chart of a wireless charging monitoring method in another embodiment, which includes the following steps.
  • step S350 it is determined whether the temperature T is equal to the preset temperature T1. If they are equal, the two are balanced. After the frequency F is not adjusted, the process returns to the steps S310, S320, and S330. If the two are not balanced, step S350 is performed.
  • S350 Determine whether the temperature is less than a preset temperature.
  • step 365 It is determined whether the temperature T is less than the preset temperature T1, and if so, step 365 is performed. If the temperature T is greater than the preset temperature T1, step S355 is performed.
  • the threshold temperature T2 is the maximum allowable temperature of the wireless charging device during charging. When the temperature T is greater than the threshold temperature T2, step S370 is performed. If the temperature T is less than or equal to the threshold temperature T2, step S360 is performed.
  • the startup heat dissipation command is used to control the heat dissipation module to be turned on to reduce the temperature of the wireless charging device, promote the balance between the charging state and the temperature T during the wireless charging process, and improve the safety and efficiency in the wireless charging process.
  • a frequency adjustment command for generating an operating frequency for increasing the wireless charging device is processed differently depending on the specific temperature. Specifically, when the temperature difference between the temperature T and the preset temperature T1 is within a predetermined small range, the increase is small. When the temperature difference between the temperature T and the preset temperature T1 is large, the frequency increase range is correspondingly adjusted to achieve a balance between the wireless state of charge and the temperature T as soon as possible.
  • the output power is increased by decreasing the frequency F to increase the charging rate.
  • a shutdown command is generated to control the wireless charging device to stop charging, Forming protection for the wireless charging device.
  • the operating frequency of the wireless charging device is adjusted according to the received frequency adjustment command. If the heat dissipation command is received, the heat dissipation module is controlled to turn on the heat dissipation and the heat dissipation module is turned off after the temperature T and the state of charge are balanced to save power. After receiving the shutdown command, the wireless charging device is controlled to stop charging to form protection for the wireless charging device.
  • FIG. 4 is a circuit block diagram of a wireless charging monitoring apparatus in a second preferred embodiment, including a temperature detecting module 410, a control module 440, and an executing module 450.
  • the temperature detecting module 410 is configured to perform real-time detection on the temperature of the wireless charging device during wireless charging, and output the detected temperature T to the control module 440.
  • the temperature detecting module 410 is disposed in a heat accumulating area in the wireless charging device to enable the most realistic reaction of the temperature of the wireless charging device.
  • the heat accumulation area is usually a region where the heat-generating device is concentrated and the heat dissipation condition is poor.
  • the devices with severe heat generation are mainly high-frequency switching devices, power devices that flow through high current or high voltage.
  • the temperature detecting module 410 is disposed on a surface of the power device.
  • the temperature detecting module 110 may be disposed on the surface of the heat sink of the power device, or may be disposed on the housing of the wireless charging device where the heat accumulation region is located, or on the circuit board on which the device with severe heat generation is installed.
  • the position where the temperature detecting module 110 is disposed in the embodiment shown in FIG. 1 may be the same as or different from the position set by the temperature detecting module 410 in the embodiment shown in FIG.
  • the temperature allowed on the surface of the power device is about 90 ° C to 100 ° C
  • the ambient temperature in the radiation range is generally about 70 ° C
  • the temperature of the casing at the corresponding position is also about 70 ° C.
  • the control module 440 is connected to the temperature detecting module 410, receives the signal transmitted by the temperature detecting module 410, and sends a control signal to the executing module 450 according to the received temperature signal to control the charging state of the wireless charging device.
  • the control module 440 determines, according to the signal transmitted by the temperature detecting module 410, whether the rate of temperature rise of the wireless charging device exceeds a first preset rate. When the determination result is yes, the first preset is issued according to the first preset. The algorithm reduces the command of the charging power of the wireless charging device; conversely, when the determination result is no, the wireless charging device issues an instruction to charge at the rated power. In other optional embodiments, when the determination result is no, the current charging power of the wireless charging device can be maintained without increasing the charging power or reducing the charging power.
  • the first preset algorithm may be to reduce the charging power of the wireless charging device To a certain preset charging power, for example, to 80% or 60% of the rated charging power.
  • the first preset algorithm may also adjust the rate of decrease or decrease of the charging power of the wireless charging device according to the rate of temperature rise. For example, if the rate of temperature rise is high, the rate of decrease of the charging power is high, or the charging power is lowered. The amplitude is large, or the charging power is reduced to a relatively small value; the rate of temperature rise is low, the rate of charging power reduction is small, or the charging power is reduced by a small amount, or the charging power is reduced to a relatively high value. .
  • control module 440 determines whether the temperature of the wireless charging device exceeds the first preset temperature (T1) according to the signal transmitted by the temperature detecting module 410, and when the determination result is yes, issues the second pre-
  • the algorithm is configured to reduce the charging power of the wireless charging device; conversely, when the determination result is no, the wireless charging device issues an instruction to charge at the rated power.
  • the determination result when the determination result is no, the current charging power of the wireless charging device can be maintained without increasing the charging power or reducing the charging power.
  • the second preset algorithm may be to reduce the charging power of the wireless charging device to a certain preset charging power, for example, to 70% or 60% or 50% of the rated charging power.
  • the second preset algorithm may also be configured to adjust a rate or a reduced value of the charging power reduction of the wireless charging device according to a difference between the temperature of the wireless charging device and the first preset temperature, for example, when the temperature exceeds the first preset temperature, The charging power of the wireless charging device is reduced at a large rate, or the charging power is reduced by a large amount, or the charging power is reduced to a relatively small value; when the temperature exceeds the first preset temperature, the charging power is compared. The small rate is reduced, or the magnitude of the charging power reduction is small, or the charging power is reduced to a relatively high value.
  • the execution module 450 is connected to the control module 440 for receiving the command output by the control module 440, thereby adjusting the charging state of the wireless charging device, ensuring that the wireless charging can be performed normally, and improving the security of the wireless charging process.
  • the execution module 450 increases, maintains or reduces the charging power of the wireless charging device by adjusting the charging current or the charging voltage of the wireless charging device.
  • the execution module 450 can adjust the charging current of the wireless charging device by adjusting the operating frequency of the wireless charging device.
  • the operating frequency of the wireless charging device is the oscillation frequency of the wireless transmitting coil and the wireless receiving coil.
  • the wireless charging device when the resonant frequency of the wireless charging device is 85 kHz, when the operating frequency of the wireless charging device is 85 kHz, the wireless charging device has the highest operating efficiency and the maximum charging power.
  • the operating frequency of the wireless charging device is away from the resonant frequency of 85 KHz.
  • the direction adjustment is such that the operating frequency of the wireless charging device is much greater or much less than the resonant frequency of 85 KHz.
  • the operating frequency of the wireless charging device is adjusted toward a direction close to 85 KHz, that is, the operating frequency of the wireless charging device is approximately equal to the resonant frequency of 85 KHz.
  • the execution module 450 can control the wireless charging device to reduce the charging current by means of pulse charging.
  • Pulse charging is to charge the energy storage device with a non-continuous pulse current. Since the charging current is not continuously output during the pulse charging, the average value of the charging current can be greatly reduced.
  • the PWM signal is taken as an example for explanation.
  • the pulse current is not a pulse with a duty ratio other than 100% in the PWM signal, but means that the device generating the PWM intermittently generates the PWM signal.
  • the wireless charging monitoring device may further include a heat dissipation module 460.
  • the heat dissipation module 460 is connected to the control module 440 for receiving an open heat dissipation command of the output thereof, and is turned on under the control of the command to reduce the temperature of the wireless charging device.
  • the control module 440 determines that the temperature of the wireless charging device exceeds the first preset temperature T1, an instruction to turn on the heat dissipation is issued.
  • control module 440 when the control module 440 determines that the temperature of the wireless charging device exceeds the first preset temperature, it further determines whether the temperature of the wireless charging device exceeds the second preset temperature T2. The second preset temperature is greater than the first preset temperature.
  • the control module 440 issues an instruction to reduce the charging power of the wireless charging device to less than 10% of the rated charging power, and the execution module 450 reduces the charging power of the wireless charging device to the rated according to the instruction of the control module 440. 10% or less of the charging power.
  • the command to reduce the charging power of the wireless charging device to less than 10% of the rated charging power includes controlling the wireless charging device to stop outputting the charging power and reducing the charging power to 8% or 5% of the rated charging power, that is, the wireless charging device stops.
  • the charging process for the energy storage device is the second preset temperature T2 is the maximum temperature allowed by the wireless charging device. Exceeding this temperature will cause safety problems, such as temperature rise that does not meet the safety requirements, damage of the device, and the like.
  • the control module 440 continuously detects the current temperature of the wireless charging device through the temperature detecting module 410. And determining whether the current temperature of the wireless charging device is lower than the third preset temperature T3. When the determination result is yes, issuing an instruction to increase the charging power of the wireless charging device, that is, returning the charging power to the rated charging power or restarting the normal charging. .
  • Execution module 450 according to control The instructions of module 440 increase the charging power of the wireless charging device.
  • Increasing the charging power of the wireless charging device includes switching from a low charging power state to a high charging power state, and also includes switching from a non-charging state to a starting charging state.
  • the third preset temperature T3 is lower than the second preset temperature T2 by a preset value.
  • the third preset temperature T3 is 5 to 15 ° C lower than the second preset temperature T2. More preferably, the third preset temperature T3 is 5 to 10 ° C lower than the second preset temperature T2.
  • the third preset temperature T3 is less than or equal to the first preset temperature T1.
  • the wireless charging monitoring device may further include an alarm module 470.
  • the control module 440 issues an instruction to reduce the charging power of the wireless charging device to less than 10% of the rated power
  • the alarm module alerts the operator.
  • the way of the alarm includes but is not limited to the following modes, the indicator light flashes an alarm, the audible alarm, and the indicator light with a specific identifier illuminate.
  • the alarm module 470 can be disposed at the wireless charging transmitter of the wireless charging device or at the wireless charging receiving end. Regardless of whether the alarm module 470 is disposed at the wireless charging transmitter or the wireless charging receiver, the alarm module 470 can directly or indirectly draw power from the AC power source for operation as long as the wireless charging device has an output of charging power. However, when the alarm module 470 is set at the wireless charging receiving end, and the wireless charging device no longer outputs the charging power, the wireless charging receiving end is not connected to the AC power source, and cannot be powered from the AC power source for its operation. Therefore, when the alarm module 470 is disposed at the wireless charging receiving end of the wireless charging device, preferably, the alarm module 470 is electrically connected to the energy storage device to take power from the energy storage device for operation.
  • FIG. 5 is a flow chart of a first preferred embodiment of the wireless charging monitoring apparatus of the embodiment shown in FIG. 4, including the following steps.
  • S510 Acquire a temperature of the wireless charging device.
  • the specific way of obtaining the temperature is to electrically connect with the temperature detecting module, obtain the signal transmitted by the temperature detecting module, and identify the signal.
  • the position set by the temperature detection module is as described above.
  • step S530 Determine whether the temperature of the wireless charging device exceeds a first preset temperature. That is, it is determined whether the temperature of the wireless charging device is greater than or equal to the first preset temperature.
  • the process proceeds to step S550.
  • the process proceeds to step S520.
  • the process may return to step S510. The return to step S510 means that the current charging power of the wireless charging device is maintained, and no active change is made.
  • step S520 Issue an instruction that the wireless charging device is charged at a rated charging power.
  • the execution module controls the wireless charging device to charge the energy storage device at the rated charging power.
  • the process may proceed to step S510, or may be the predetermined time period before proceeding to S510.
  • step S550 Send an instruction to reduce the charging power of the wireless charging device according to the second preset algorithm. After receiving the instruction, the execution module reduces the charging power of the wireless charging device according to the second preset algorithm.
  • the second preset algorithm is as described above. In an optional other embodiment, step S550 may proceed to step S570, or may directly return to step S510.
  • step S570 generating a startup heat dissipation command.
  • the startup heat dissipation command is used to control the heat dissipation module to be turned on for heat dissipation to lower the temperature of the wireless charging device.
  • the process may proceed to step S510 or a preset length of time to proceed to step S510.
  • FIG. 6 is a flow chart of a second preferred embodiment of the wireless charging monitoring device of the embodiment shown in FIG. 4, including the following steps.
  • step S612 Determine whether the temperature of the wireless charging device exceeds a first preset temperature. That is, it is determined whether the temperature of the wireless charging device is greater than or equal to the first preset temperature.
  • the process proceeds to step S614.
  • the process proceeds to step S613.
  • the process may return to step S610. The meaning of returning to step S610 is to maintain the current charging power of the wireless charging device unchanged.
  • step S613 an instruction to charge the wireless charging device at a rated charging power is issued. After receiving the instruction, the execution module controls the wireless charging device to charge the energy storage device at the rated charging power. After the end of step S613, the process may proceed to step S610 immediately, or may be the predetermined time period before proceeding to S610.
  • step S614. Determine whether the temperature of the wireless charging device exceeds a second preset temperature. That is, it is determined whether the temperature of the wireless charging device is greater than or equal to a second preset temperature, and the second preset temperature is greater than the first preset temperature.
  • the process proceeds to step S620.
  • the process proceeds to step S616.
  • step S616 Issue an instruction to reduce the charging power of the wireless charging device according to the second preset algorithm. After receiving the instruction, the execution module reduces the charging power of the wireless charging device according to the second preset algorithm.
  • the second preset algorithm is as described above.
  • step S616 may be followed by step S618, or may directly return to step S610.
  • step S618, generating a startup heat dissipation command.
  • the startup heat dissipation command is used to control the heat dissipation module to be turned on for heat dissipation to lower the temperature of the wireless charging device.
  • the process may proceed to step S610 or a preset length of time and then proceed to step S610.
  • step S620 Generate an instruction to reduce the charging power of the wireless charging device to below a second preset power.
  • the execution module reduces the charging power of the wireless charging device to below the second preset power.
  • the second preset power is less than 10% of the rated power of the wireless charging device. More preferably, the second preset power is the charging power when the wireless charging device stops charging.
  • the start alarm command is used to control the alarm module to alert the operator.
  • the command to initiate an alarm can be generated by the control module or by the alarm module itself.
  • the alarm module is installed on the wireless charging transmitter or the wireless charging receiver of the wireless charging device, the command to start the alarm can be generated by the control module.
  • the command to start the alarm is generated by the alarm module itself.
  • the alarm module detects that the charging power of the wireless charging device is less than 10% of the rated power, it may determine that the temperature of the wireless charging device exceeds the second preset temperature, and then initiate an alarm.
  • step S622 After step S622, the process proceeds to step S624.
  • S624 to S628 The purpose of S624 to S628 is to detect in real time whether the temperature of the wireless charging device is restored from the high temperature to the normal temperature, and once it returns to the normal temperature, the state of the wireless charging device is switched from the state of no charging to the state of normal charging.
  • the specific steps are as follows:
  • step S624. Acquire a temperature of the wireless charging device.
  • the way to obtain the temperature of the wireless charging device is to receive the signal of the temperature detecting module and identify it. The position set by the temperature detection module is as described above. Then it proceeds to step S626.
  • S626 Determine whether the temperature of the wireless charging device is lower than a third preset temperature T3.
  • the relationship between the third preset temperature T3 and the first preset temperature T1 and the second preset temperature T2 is as described above.
  • the judgment result is yes, It indicates that the temperature of the wireless charging device has recovered from the high temperature to the normal temperature, and the wireless charging device can resume normal charging, and the process proceeds to step S626.
  • the result of the determination is NO, it indicates that the temperature of the wireless charging device is still in a high temperature state, and normal charging cannot be resumed, and the process proceeds to step S624.
  • step S628 generating an instruction to increase the charging power of the wireless charging device.
  • the command is used to control the execution module to restore the state in which the wireless charging device is normally charged or to be charged at the rated charging power. Then, the process proceeds to step S610.
  • step S622 the process proceeds to step S610, and there is no step S624 to step S628.
  • step S610 the process proceeds to step S610, and there is no step S624 to step S628.
  • step S624 the process proceeds to step S610, and there is no step S624 to step S628.
  • step S628 the process proceeds to step S610, and there is no step S624 to step S628.
  • step S622 between step S622 and step S624, a step of initiating heat dissipation is added.
  • the content of this step is the same as S618.
  • the other steps included in this embodiment are the same as those of the second preferred embodiment.
  • the present invention also provides a fifth preferred embodiment.
  • This embodiment is basically the same as the preferred embodiment shown in FIG. The difference is that, in the present embodiment, step S530 in Fig. 5 is replaced by step S530', and step S550 in Fig. 5 is replaced by step S550'.
  • Step S530' is to determine whether the rate of temperature rise of the wireless charging device exceeds a first preset rate.
  • Step S550' is an instruction to reduce the charging power of the wireless charging device according to the first preset algorithm.
  • the present invention also provides a sixth preferred embodiment.
  • This embodiment is basically the same as the preferred embodiment shown in FIG. 6. The difference is that, in the present embodiment, step S612 in FIG. 6 is replaced by step S612', step S614 in FIG. 6 is replaced by step S614', step S616 in FIG. 6 is replaced by step S616', and step S626' is replaced by step S626'.
  • Step S612' is to determine whether the rate of temperature rise of the wireless charging device exceeds the first preset rate.
  • Step S616' is an instruction to reduce the charging power of the wireless charging device according to the first preset algorithm.
  • Step S614' is to determine whether the rate of temperature rise of the wireless charging device exceeds a second predetermined rate.
  • Step S626' is to determine whether the rate of temperature rise of the wireless charging device is lower than a third preset rate, and the third preset rate is lower than the second preset rate.
  • the first preset temperature T1 is a preferred temperature allowed by the wireless charging device in the current wireless charging state, at which the charging power of the wireless charging device and the temperature rise of the wireless charging device are reached.
  • wireless charging monitoring device further package Includes a charge status detection module.
  • the charging state detecting module detects the charging state of the wireless charging device, and transmits the detection result to the control module, and the control module sets the value of the first preset temperature T1 according to the result transmitted by the charging state detecting module.
  • control module can also adjust at least one of the second preset temperature T2 and the third preset temperature T3 according to the charging state of the wireless charging device.
  • first preset rate, the second preset rate, and the third preset rate may also be adjusted according to the current charging state.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

La présente invention concerne un procédé de surveillance de charge sans fil pour surveiller un processus de charge d'un appareil de stockage d'énergie par un appareil de charge sans fil, comprenant les étapes suivantes : acquisition d'une température de l'appareil de charge sans fil ; et ajustement d'un état de charge de l'appareil de charge sans fil en fonction de la température. Le procédé de surveillance de charge sans fil améliore efficacement la sécurité du processus de charge sans fil. La présente invention concerne en outre un appareil de charge sans fil et un appareil de surveillance de charge sans fil.
PCT/CN2016/087085 2015-06-26 2016-06-24 Appareil et procédé de surveillance de charge sans fil, et appareil de charge sans fil WO2016206631A1 (fr)

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