A method for outdoor power supply of vehicle-mounted batteries

Abstract

The application relates to an outdoor power supply method for a vehicle-mounted battery and relates to the field of vehicle-mounted power supply technology of a new energy vehicle, which comprises the following steps: collecting a working voltage in response to a power supply signal; forming a combined voltage; defining a matching combined voltage when the combined voltage is equal to the working voltage; supplying power to outdoor equipment by using the vehicle-mounted battery corresponding to the matching combined voltage; calculating a voltage difference when the combined voltage is not equal to the working voltage; screening a combined voltage with the minimum voltage difference and defining the combined voltage as an expected combined voltage; defining the voltage difference as an expected voltage difference; and controlling the battery to adjust its voltage to the expected voltage difference and then supplying power together with the vehicle-mounted battery. The application has the effects of intelligent combination of the vehicle-mounted power supply and dynamic voltage regulation compensation, solves the problem that multiple batteries cannot work according to the working voltage and are prone to high or low final working voltage, realizes efficient compatible power supply for multiple voltage equipment, and has the effects of energy optimization, flexibility and reliability.

Description

Technical Field

[0001] This invention relates to the field of on-board power technology for new energy vehicles, and in particular to a method for providing outdoor power supply for on-board batteries. Background Technology

[0002] New energy vehicles are generally powered by a single lithium battery or by adding a fuel engine as a range extender. The vehicle is driven entirely by an electric motor, and the fuel engine is only responsible for generating electricity when the battery is low.

[0003] Vehicle batteries employ a multi-cell series power supply method, used when multiple devices need to be connected. The power supply quality of new energy vehicle batteries is often unstable or fails to meet requirements; for example, low voltage or frequent fluctuations can lead to voltage instability. Furthermore, outdoor environmental factors such as high and low temperatures and humidity can cause battery components to age, deform, and rust, thus affecting power supply stability. If the vehicle battery's power supply equipment exceeds its electrical parameter range, it may cause significant current fluctuations, resulting in voltage instability.

[0004] Regarding the aforementioned technologies, although multiple batteries can produce different combinations of voltages, if the operating voltage of an outdoor device is a voltage that cannot be achieved by any combination, it cannot operate according to the operating voltage. This can easily result in the final operating voltage being too high or too low. If the voltage is too high, it can easily damage the outdoor device, while if the voltage is too low, it cannot work properly. There is still room for improvement. Summary of the Invention

[0005] To prevent outdoor equipment from operating at voltages that cannot be achieved by any combination, thus avoiding situations where the final operating voltage is too high or too low, this invention provides a method for outdoor power supply of vehicle batteries.

[0006] This invention provides a method for outdoor power supply of a vehicle battery, employing the following technical solution:

[0007] A method for providing outdoor power to a vehicle-mounted battery includes:

[0008] Step 1: In response to the preset power supply signal, collect the operating voltage of the outdoor equipment;

[0009] Step 2: Combine any number of voltages based on the preset vehicle voltage to form a combined voltage;

[0010] Step 3: When a combined voltage equal to the operating voltage exists, the combined voltage is defined as the matching combined voltage;

[0011] Step 4: Power the outdoor device with the vehicle battery corresponding to the matched voltage combination;

[0012] Step 5: When there is no combined voltage equal to the operating voltage, calculate the voltage difference based on the combined voltage and the operating voltage;

[0013] Step 6: Filter the combined voltage with the smallest value corresponding to the voltage difference and define it as the expected combined voltage. Define the voltage difference corresponding to the expected combined voltage as the expected voltage difference.

[0014] Step 7: After the battery adjusts its own voltage to the expected voltage difference, it works together with the vehicle battery corresponding to the expected combined voltage to supply power to the outdoor equipment. The battery contains a voltage regulator to adjust its own output voltage.

[0015] By adopting the above technical solution, through intelligent combination of vehicle power supply and dynamic voltage regulation compensation, the problem that multiple batteries still cannot work according to the working voltage, which easily leads to the final working voltage being too high or too low, is solved. This achieves efficient and compatible power supply for multi-voltage devices, combining energy optimization, flexibility and reliability.

[0016] Optionally, before collecting the operating voltage of the outdoor equipment, the method further includes:

[0017] Step 8: Collect the current battery charge and current battery voltage;

[0018] Step 9: Form a matching voltage group based on the vehicle voltage;

[0019] Step 91: If the current battery charge is greater than the preset depletion threshold, then proceed to step 1.

[0020] Step 92: If the current battery storage capacity is less than the depletion threshold, then match the current battery voltage with the vehicle voltage in the matching voltage group to obtain the same vehicle voltage, and define the vehicle voltage as the matching vehicle voltage.

[0021] Step 93: Control the on-board battery corresponding to the matched vehicle voltage to charge the storage battery until the current storage capacity of the storage battery is greater than the depletion threshold.

[0022] By adopting the above technical solution, the problems of safe battery replenishment and life protection are solved through three stages: real-time monitoring, intelligent matching, and targeted charging, thereby improving the self-sufficiency of the vehicle energy enhancement system.

[0023] Optionally, it also includes a method for determining whether to control the on-board battery corresponding to the matched on-board voltage to charge the storage battery, the method comprising:

[0024] Step 930: Determine whether the matching vehicle voltage exists;

[0025] Step 931: When the matching vehicle voltage exists, control the vehicle battery corresponding to the matching vehicle voltage to charge the storage battery until the current storage capacity of the storage battery is greater than the depletion threshold.

[0026] Step 932: When the matching vehicle voltage does not exist, control the battery to adjust its own voltage to the vehicle voltage closest to the current battery voltage, and define the selected vehicle voltage as the target vehicle voltage.

[0027] Step 933: Control the on-board battery corresponding to the target on-board voltage to charge the storage battery until the current storage capacity of the storage battery is greater than the depletion threshold.

[0028] By adopting the above technical solution and implementing a hierarchical logic of "priority matching → dynamic voltage regulation", the efficiency, safety and compatibility of battery charging are achieved. It is especially suitable for mobile scenarios with multiple power sources, avoiding charging failure or battery damage caused by voltage mismatch, while reducing dependence on external charging equipment.

[0029] Optionally, the method for controlling the on-board battery corresponding to the matched on-board voltage to charge the storage battery includes:

[0030] Step 934: Collect the current on-board stored power of the on-board battery corresponding to the matched on-board voltage;

[0031] Step 935: Based on the matched vehicle voltage, find the corresponding normal operating power threshold value from the preset working database;

[0032] Step 936: If the current on-board stored power is greater than the normal operating power threshold, then control the on-board battery corresponding to the matching on-board voltage to charge the storage battery;

[0033] Step 937: If the current on-board stored power is equal to the normal operating power threshold, remove the matching on-board voltage from the matching voltage group and repeat step 930.

[0034] By adopting the above technical solution and through the closed-loop logic of "power acquisition → threshold judgment → dynamic adaptation", the problem of low-power batteries participating in charging is solved, preventing them from continuing to discharge and causing deep discharge, thus extending battery life.

[0035] Optionally, it also includes a method for determining whether the on-board battery corresponding to the control matching voltage should charge the battery if the current on-board stored power is greater than the normal operating power threshold. This method includes:

[0036] Step 9360: Receive a preset external charging signal;

[0037] Step 9361: Upon receiving the external charging signal, control the on-board battery corresponding to the matching on-board voltage to stop charging the storage battery;

[0038] Step 9362: If the current on-board stored power is less than the normal operating power threshold, control the external charging device to charge the on-board battery corresponding to the matched on-board voltage;

[0039] Step 9363: If the current on-board stored power is greater than the normal operating power threshold, control the external charging device to charge the battery.

[0040] By adopting the above technical solution and using the closed-loop logic of "signal response → status judgment → dynamic allocation", the problem of how to efficiently allocate energy when the power of external charging equipment is limited is solved, the utilization rate of external power supply is improved, and intelligent management of multiple power supply collaboration is realized.

[0041] Optionally, the method for controlling the on-board battery corresponding to the matching on-board voltage to stop charging the storage battery when the external charging signal is received includes:

[0042] Step 93610: When the external charging signal is received but the power supply signal is not received at the same time, the vehicle battery corresponding to the vehicle voltage is controlled to stop charging the storage battery.

[0043] Step 93611: When the external charging signal is received at the same time as the power supply signal, determine whether the current on-board storage capacity is greater than the current battery storage capacity;

[0044] Step 93612: If the current onboard power storage is greater than the current battery power storage, control the onboard battery to supply power to the outdoor equipment and control the external charging device to charge the battery.

[0045] Step 93613: If the current onboard power storage is less than the current battery power storage, control the battery to supply power to the outdoor equipment and control the external charging device to charge the onboard battery.

[0046] By adopting the above technical solution and through the closed-loop logic of "signal response → power comparison → dynamic allocation", the problem of needing manual intervention in complex scenarios to avoid damage to one party due to excessive discharge is solved, the ability of outdoor equipment to continuously supply power is improved, and energy efficiency is achieved.

[0047] Optionally, the method for controlling the on-board battery corresponding to the matched on-board voltage to charge the battery when the current battery charge is less than the depletion threshold further includes:

[0048] Step 938: Execute the preset power failure protection command and output the preset alarm signal.

[0049] By adopting the above technical solution and through the linkage design of "power failure protection + alarm output", the power supply to unnecessary loads is actively cut off when the battery is low on power, which solves the problem of equipment damage or data loss caused by low voltage and improves the safety of users.

[0050] Optionally, a specific method for controlling the battery to adjust its own voltage to the expected voltage difference and then, together with the vehicle battery corresponding to the expected combined voltage, power the outdoor equipment includes:

[0051] Step 70: Collect the real-time operating voltage of the outdoor device and the expected output voltage of the vehicle battery corresponding to the expected combined voltage;

[0052] Step 71: Generate a real-time operating voltage variation curve based on the real-time operating voltage;

[0053] Step 72: Generate the expected voltage change curve based on the expected output voltage;

[0054] Step 73: Process the real-time operating voltage change curve based on the preset normal fluctuation range of the real-time operating voltage to obtain the compensation change curve;

[0055] Step 74: Process the expected voltage change curve based on the expected voltage change normal fluctuation range to obtain the fluctuation change curve;

[0056] Step 75: Perform data processing on the fluctuation change curve and the compensation change curve to obtain the fluctuation compensation change curve;

[0057] Step 76: Control the battery to adjust its voltage according to the fluctuation compensation curve.

[0058] By adopting the above technical solution and implementing closed-loop control of "monitoring-analysis-compensation-adjustment", the problems of resource waste or overload and accelerated aging of batteries due to excessive compensation are solved, the anti-interference ability of batteries is improved, and the efficient, safe and reliable operation of outdoor equipment power supply system is achieved.

[0059] Optionally, a method for forming the combined voltage may be included, the method comprising:

[0060] Step 20: Collect the output voltage of the vehicle battery corresponding to the matching voltage group;

[0061] Step 21: Generate an output voltage variation curve based on the output voltage;

[0062] Step 22: Determine whether the output voltage change curve falls completely within the normal output fluctuation range;

[0063] Step 220: When the output voltage change curve falls completely within the normal output fluctuation range, the vehicle battery corresponding to the combined voltage supplies power to the outdoor equipment.

[0064] Step 221: Since there are some curves in the output voltage change curve that do not fall within the normal fluctuation range of the output, the output voltage change curve is decomposed to obtain individual voltage change curves;

[0065] Step 2210: Calculate the degree of voltage fluctuation based on the individual voltage change curve;

[0066] Step 2211: Select the vehicle voltage with the largest voltage fluctuation and define it as an unstable vehicle voltage;

[0067] Step 2212: Remove the unstable vehicle voltage from the matching voltage group and update the output voltage change curve until the output voltage change curve falls completely into the normal output fluctuation range;

[0068] Step 2213: After the output voltage change curve falls completely into the normal output fluctuation range, the combined voltage is formed based on the corresponding matching voltage group.

[0069] By adopting the above technical solution and through a closed-loop process of "combined testing → fluctuation analysis → dynamic elimination → stable output", the problem of unstable power supply caused by unstable voltage is solved, and the stability of output voltage is improved.

[0070] Optionally, a method for supplying power to the outdoor equipment by forming the combined voltage based on the corresponding matching voltage group after the output voltage variation curve falls completely within the normal output fluctuation range, the method comprising:

[0071] Step 22130: If the voltage difference is less than or equal to the preset maximum battery voltage, then continue to step 3;

[0072] Step 22131: If the voltage difference is greater than the maximum voltage of the battery, the unstable vehicle voltage is regarded as a stable vehicle voltage, and the battery pack is put back in and step 6 is continued.

[0073] By adopting the above technical solution and through the mechanism of "threshold judgment → dynamic recovery → closed-loop verification", the problem of dynamic balance between security and resource utilization is solved, and resource waste caused by permanent removal is avoided.

[0074] In summary, the present invention has at least one of the following beneficial technical effects:

[0075] By combining intelligent on-board power supply with dynamic voltage regulation and compensation, the problem of multiple batteries still not being able to work according to the operating voltage, which easily leads to the final operating voltage being too high or too low, is solved. This achieves efficient and compatible power supply for multi-voltage devices, combining energy optimization, flexibility and reliability.

[0076] By implementing a closed-loop control system of "monitoring-analysis-compensation-adjustment," the problem of battery waste or overload caused by excessive compensation and accelerated aging is solved, the battery's anti-interference capability is improved, and the outdoor equipment power supply system is made efficient, safe, and reliable.

[0077] By employing a closed-loop logic of "signal response → power comparison → dynamic allocation," the problem of requiring manual intervention in complex scenarios to prevent damage to one party due to excessive discharge is solved, thereby improving the continuous power supply capability of outdoor equipment and achieving efficient energy utilization. Attached Figure Description

[0078] Figure 1 This is a flowchart of an outdoor power supply method for a vehicle-mounted battery according to an embodiment of this application.

[0079] Figure 2 This is a flowchart of the method for collecting the operating voltage of outdoor equipment in the embodiments of this application.

[0080] Figure 3 This is a flowchart of a method for determining whether to control the on-board battery corresponding to the vehicle voltage to charge the storage battery in an embodiment of this application.

[0081] Figure 4 This is a flowchart of a method for controlling the on-board battery to charge the storage battery according to the vehicle voltage in an embodiment of this application.

[0082] Figure 5 This is a flowchart illustrating a method for determining whether the on-board battery corresponding to the control matching voltage is charging the storage battery, as described in this application embodiment.

[0083] Figure 6 This is a flowchart illustrating a method for controlling the on-board battery corresponding to the vehicle voltage to stop charging the storage battery when an external charging signal is received, as described in this application embodiment.

[0084] Figure 7 This is a flowchart illustrating a method for controlling the on-board battery corresponding to the vehicle voltage to charge the battery when the current battery charge is less than the depletion threshold, as described in this application embodiment.

[0085] Figure 8This is a flowchart illustrating a specific method in this application embodiment for controlling the storage battery to adjust its own voltage to the expected voltage difference and then powering outdoor equipment together with the vehicle battery corresponding to the expected combined voltage.

[0086] Figure 9 This is a graph showing the real-time operating voltage change, expected voltage change, compensation change, fluctuation, and fluctuation compensation change in the embodiments of this application.

[0087] Figure 10 This is a flowchart of the method for forming the combined voltage in the embodiments of this application. Detailed Implementation

[0088] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0089] Reference Figure 1 A method for providing outdoor power to a vehicle-mounted battery includes:

[0090] Step 1: In response to the preset power supply signal, collect the operating voltage of the outdoor equipment.

[0091] Power supply signal refers to the signal that transmits the need for electricity to a vehicle through actions such as switching. Outdoor equipment refers to tools and equipment systems specifically designed for outdoor activities. These devices, through technological integration, enable users to provide energy supply, living support, safety protection, and entertainment support in the wild, such as outdoor induction cookers. The operating voltage of outdoor equipment refers to the rated voltage required for the normal operation of the outdoor equipment, which is collected by a voltmeter.

[0092] Step 2: Combine any number of voltages based on the preset vehicle voltage to form a combined voltage.

[0093] Vehicle voltage is the output voltage that a car's onboard battery can provide. Combined voltage is the total voltage achieved by connecting multiple onboard batteries in series. Combined voltage is achieved by adding or subtracting voltage values.

[0094] In this combination, only the addition method is selected, that is, the positive terminal of the voltage source is connected to the negative terminal of the next voltage source, and there is no case where the positive terminal of the voltage source is connected to the positive terminal of the next voltage source.

[0095] In practical circuits, voltage sources may have internal resistance. When voltage sources are connected in series, their internal resistances are also connected in series, and the total internal resistance is the sum of the internal resistances of each voltage source. The total voltage is the algebraic sum of the voltages of each voltage source minus the voltage drop across the total internal resistance. For ease of calculation and because the internal resistance of outdoor equipment is usually large, the internal resistance of the voltage sources can be ignored. Therefore, this application ignores the voltage effect caused by internal resistance.

[0096] Step 3: When there is a combined voltage equal to the operating voltage, define the combined voltage as the matching combined voltage.

[0097] The existence of a combined voltage equal to the operating voltage indicates that the combined voltage can directly provide the operating voltage required by outdoor equipment.

[0098] Step 4: Power the outdoor equipment with the vehicle battery that matches the voltage combination.

[0099] Here, the vehicle battery is connected in series before power is supplied.

[0100] Step 5: Calculate the voltage difference based on the combined voltage and the working voltage when there is no combined voltage equal to the working voltage.

[0101] The voltage difference is the difference between the combined voltage and the operating voltage. It is calculated by subtracting the combined voltage from the operating voltage. If the combined voltage and the operating voltage cannot be precisely matched, it means that power cannot be supplied solely by the combination of the vehicle battery. For example, if the combined voltage is 10V and the operating voltage is 12V, then the expected voltage difference = operating voltage - combined voltage = 12V - 10V = 2V.

[0102] Step 6: Select the combination voltage with the smallest value corresponding to the voltage difference and define it as the expected combination voltage. Define the voltage difference corresponding to the expected combination voltage as the expected voltage difference.

[0103] Here, since outdoor equipment is easily damaged due to excessive output voltage when the combined voltage is greater than the working voltage, the case of negative voltage difference is excluded. If a negative voltage difference is generated corresponding to a combined voltage, the combined voltage is removed, and the remaining combined voltages with a voltage difference greater than 0 are selected.

[0104] Step 7: Control the battery to adjust its own voltage to the expected voltage difference, and then work together with the vehicle battery corresponding to the expected combined voltage to power the outdoor equipment.

[0105] The battery contains a voltage regulator that adjusts its own output voltage. The voltage regulator is integrated into the BMS (Battery Management System) DC-DC converter. When the battery voltage is higher than the target value, it quickly switches the circuit via a high-frequency switch, utilizing the energy storage characteristics of inductors and capacitors to release the excess voltage in the form of pulses, thereby reducing the output voltage.

[0106] When the battery voltage is lower than the target value, the inductor stores energy and releases a high-frequency pulse to raise the voltage to the target value. It can also monitor the output voltage and dynamically adjust the switching frequency or duty cycle via PWM (Pulse Width Modulation) signals to maintain output stability. The battery output voltage is adjusted to the expected voltage difference, with the on-board battery pack providing the base voltage corresponding to the expected combined voltage. The battery provides compensation voltage. For example, if the expected combined voltage is 18V, and the outdoor equipment requires 20V, then the battery needs to output 2V.

[0107] Reference Figure 2 Before collecting the operating voltage of outdoor equipment, the following steps are also included:

[0108] Step 8: Collect the current battery charge and current battery voltage.

[0109] The current battery charge refers to the total amount of remaining electrical energy that the battery can release in its current state. The remaining battery charge is obtained in real time through the Battery Management System (BMS) and estimated using a coulomb counter.

[0110] The current battery voltage refers to the battery voltage before the operating voltage of the outdoor equipment is measured. This voltage is obtained using a voltmeter.

[0111] Step 9: Form a matching voltage group based on the vehicle voltage.

[0112] The matching voltage group is a group of vehicle batteries corresponding to all vehicle voltages, and the matching voltage group contains all vehicle voltages.

[0113] Step 91: If the current battery charge is greater than the preset depletion threshold, then proceed with step 1.

[0114] The critical discharge threshold refers to the lowest safe voltage threshold at which a battery may discharge to a level that could cause irreversible damage or significant performance degradation. This threshold has been determined through extensive testing by professionals in the field. The testing process involves: each time, according to a pre-set battery output voltage, when the battery's stored charge reaches a certain value, the battery can no longer operate normally. This stored charge is recorded as the critical discharge threshold and stored in a database, creating a mapping relationship with the battery. If the current battery charge is greater than the critical discharge threshold, it indicates that the battery can operate normally; therefore, the charging process is skipped, and the step of collecting the outdoor equipment's operating voltage is executed.

[0115] For example, if the current battery capacity is 30% and the preset depletion threshold is 20%, then if the current battery capacity is greater than the preset depletion threshold, the battery does not need to be charged.

[0116] Step 92: If the current battery charge is less than the critical charge threshold, then match the current battery voltage with the vehicle voltage in the matching voltage group to obtain the same vehicle voltage, and define the vehicle voltage as the matching vehicle voltage.

[0117] If the current battery charge is less than the critical discharge threshold, it means the battery is not functioning properly and needs to be charged.

[0118] Step 93: Control the on-board battery that matches the vehicle voltage to charge the battery until the current battery charge is greater than the depletion threshold.

[0119] The system controls the on-board battery to charge the storage battery, matching the vehicle's voltage. At this time, the output voltage of the on-board battery is consistent with the current rated voltage of the storage battery, resulting in a more stable output.

[0120] Reference Figure 3 The methods for determining whether to control the charging of the battery by the on-board battery corresponding to the vehicle voltage include:

[0121] Step 930: Determine if the matching vehicle voltage exists.

[0122] For example, if the current battery voltage is 12.5V and there is a combination of 12.5V, then the matching is successful.

[0123] Step 931: When a matching vehicle voltage exists, control the vehicle battery corresponding to the matching vehicle voltage to charge the battery until the current battery charge is greater than the depletion threshold. The existence of a matching vehicle voltage indicates that the vehicle battery corresponding to the matching vehicle voltage can directly charge the battery until the current battery charge is greater than the depletion threshold.

[0124] Step 932: When the matching vehicle voltage does not exist, control the battery to adjust its own voltage to the vehicle voltage that is closest to the current battery voltage, and define the selected vehicle voltage as the target vehicle voltage.

[0125] If a matching vehicle voltage is not specified, the corresponding vehicle battery cannot directly charge the battery. Select the voltage from all available vehicle voltage combinations that is closest to and higher than the current battery voltage. The battery's internal voltage regulator adjusts the battery voltage to the selected vehicle voltage; this selected vehicle voltage is called the target vehicle voltage.

[0126] Step 933: Control the on-board battery corresponding to the target on-board voltage to charge the storage battery until the current storage capacity of the storage battery is greater than the depletion threshold.

[0127] Reference Figure 4 Methods for controlling the charging of the storage battery by the on-board battery that matches the vehicle's voltage include:

[0128] Step 934: Collect the current on-board stored power of the on-board battery that matches the on-board voltage.

[0129] The current on-board stored capacity refers to the total remaining electrical energy that the on-board battery, matching the vehicle's voltage, can release under the current conditions. Using a high-precision current sensor and voltage sampling module, combined with the time-ampere integration method, the remaining capacity can be calculated, and the remaining capacity of the on-board battery, matching the vehicle's voltage, can be obtained in real time through the Battery Management System (BMS).

[0130] Step 935: Based on the matching vehicle voltage, find the corresponding normal operating power threshold from the preset working database.

[0131] The normal operating charge threshold refers to the minimum charge or voltage threshold required for the battery to maintain basic vehicle operation. The vehicle voltage operating database stores a mapping relationship between the matched vehicle voltage and the normal operating charge threshold. Through extensive testing by those skilled in the art, the process involves: each time output is performed according to a pre-set matched vehicle voltage, when the charge reaches a certain value, the entire vehicle battery cannot operate normally. This charge level is recorded as the normal operating charge threshold and stored in the database, establishing a mapping relationship with the matched vehicle voltage. When the system receives the matched vehicle voltage, it automatically retrieves the corresponding normal operating charge threshold from the database and outputs it.

[0132] For example, if the vehicle voltage is 13.2V, the critical power level for normal operation is 30% according to the working database; if the vehicle voltage is 26.4V, the critical power level for normal operation is 50% according to the working database.

[0133] Step 936: If the current on-board stored power is greater than the normal operating power threshold, then control the on-board battery that matches the on-board voltage to charge the battery.

[0134] The system determines that the current on-board battery charge is greater than the normal operating charge threshold by numerical analysis. It then closes the relay or MOSFET switch of the on-board battery that matches the on-board voltage, connecting the charging circuit until the current battery charge exceeds the depletion threshold. Finally, it controls the on-board battery that matches the on-board voltage to stop charging the battery.

[0135] Step 937: If the current on-board stored power is equal to the normal operating power threshold, remove the matching on-board voltage from the matching voltage group and repeat step 930.

[0136] If the current onboard battery charge is less than the normal operating charge threshold, it indicates that the onboard battery cannot function properly. Therefore, if the current onboard battery charge is equal to the normal operating charge threshold, this voltage combination is removed from the list of available matching voltage combinations to prevent subsequent selection from causing malfunction. Return to step 930 to determine if a matching onboard voltage exists, re-select available voltages based on the remaining voltage combinations, and then continue with the subsequent steps.

[0137] For example: if the vehicle voltage is 13.2V, according to the voltage-critical power mapping table, the normal operating power critical value is 30%, and its power is equal to 30%, then this combination will not be considered again.

[0138] Reference Figure 5Methods for determining whether the on-board battery corresponding to the control matching voltage is charging the storage battery include:

[0139] Step 9360: Receive a preset external charging signal.

[0140] External charging signals refer to the activation signals received from external charging devices such as charging stations or portable chargers via physical interfaces such as charging guns or wireless communication. These signals are received by measuring voltage changes using a voltmeter.

[0141] Step 9361: Upon receiving an external charging signal, control the on-board battery that matches the vehicle voltage to stop charging the storage battery.

[0142] Upon receiving an external charging signal, it indicates that an external charging device is ready to charge the battery. The system then marks the external charging mode as activated in its memory and disconnects the charging circuit between the on-board battery and the storage battery via a relay or MOSFET switch matrix.

[0143] Step 9362: If the current onboard battery power is less than the normal operating power threshold, control the external charging device to charge the onboard battery that matches the onboard voltage.

[0144] The system determines the current onboard battery level by comparing it to the critical value for normal operating power. If the current onboard battery level is lower than the critical value, it indicates that the onboard battery is not functioning properly. The system then switches the charging circuit via a relay group or sends a protocol command to an external charging device, causing the output of the external charging device to switch from the storage battery to the onboard battery that matches the vehicle's voltage. The external charging device then charges the onboard battery that matches the vehicle's voltage.

[0145] Step 9363: If the current onboard battery power is greater than the normal operating power threshold, control the external charging device to charge the battery.

[0146] The system determines the current onboard battery level by comparing it to the critical value for normal operating power. If the current onboard battery level is greater than the critical value, the onboard battery can operate normally. The system then switches the charging circuit via a relay group or sends a protocol command to an external charging device, causing the output of the external charging device to switch from the onboard battery that matches the vehicle's voltage to the storage battery. The external charging device then charges the storage battery.

[0147] Reference Figure 6 The methods for controlling the on-board battery corresponding to the vehicle's voltage to stop charging the storage battery when receiving an external charging signal include:

[0148] Step 93610: When an external charging signal is received but no power supply signal is received, the on-board battery corresponding to the vehicle voltage is controlled to stop charging the storage battery.

[0149] If the system detects an external charging signal but does not receive a power supply signal, it indicates that an external device is charging the vehicle while no outdoor equipment requires power. Immediately disconnect the charging circuit between the matched vehicle battery and the storage battery, using a relay or MOSFET switch matrix to break the physical connection, thus stopping the vehicle battery corresponding to the matched vehicle voltage from charging the storage battery.

[0150] For example: the vehicle is connected to a charging station while parked, but the vehicle's electrical appliances or outdoor equipment are not turned on.

[0151] Step 93611: When receiving both the external charging signal and the power supply signal, determine whether the current on-board power storage is greater than the current battery power storage.

[0152] If an external charging signal, such as a charging pile connection, and a power supply signal, such as an outdoor device being turned on, are detected by the system at the same time, it indicates that an external device is charging the vehicle while an outdoor device needs power. The system then uses the Battery Management System (BMS) to obtain the vehicle battery with the matching voltage and the current battery charge in real time.

[0153] For example, while the vehicle is connected to the charging station, the user turns on the vehicle's air conditioning or outdoor lighting equipment.

[0154] Step 93612: If the current onboard power storage is greater than the current battery power storage, control the onboard battery to supply power to the outdoor equipment and control the external charging device to charge the battery.

[0155] If the current onboard power storage is greater than the current battery power storage, the onboard battery, which matches the vehicle voltage, supplies power to the outdoor equipment through a voltage regulator, while the external charging device charges the battery.

[0156] For example, the vehicle battery outputs 13.2V / 10A and supplies power to outdoor equipment in constant current mode, while the charging pile inputs 14.4V / 15A and supplies power to the battery in constant voltage mode.

[0157] Step 93613: If the current onboard power storage is less than the current battery power storage, control the battery to supply power to the outdoor equipment and control the external charging device to charge the onboard battery.

[0158] If the current onboard power is less than the current battery power, the voltage regulator inside the battery will adjust the voltage to supply power to the outdoor equipment, while the external charging device will charge the onboard battery that matches the onboard voltage.

[0159] Reference Figure 7 The method for controlling the on-board battery corresponding to the vehicle voltage to charge the battery when the current battery charge is less than the depletion threshold also includes:

[0160] Step 938: Execute the preset power failure protection command and output the preset alarm signal.

[0161] The power failure protection command is a self-protection method activated when the vehicle's battery is low. For example, it disconnects non-essential onboard loads, while retaining critical equipment such as the powertrain; illuminates a red warning light on the instrument panel (e.g., "Low Battery"), and displays a text message on the HUD. Controlled via CAN bus or hardwired signals, an alarm signal triggers a buzzer or voice prompt indicating low battery. When the battery's charge recovers to a safe threshold of 30%, the alarm automatically shuts off and power is restored to non-critical equipment.

[0162] Reference Figure 8 Specific methods for controlling the storage battery to adjust its own voltage to the expected voltage difference and then powering outdoor equipment together with the vehicle battery corresponding to the expected combined voltage include:

[0163] Step 70: Collect the real-time operating voltage of the outdoor equipment and the expected output voltage of the vehicle battery corresponding to the expected combination voltage.

[0164] Real-time operating voltage refers to the actual voltage value of the outdoor device after the battery has regulated its own voltage to the expected voltage difference. Expected output voltage refers to the output voltage of the vehicle battery corresponding to the expected combined voltage after the battery has regulated its own voltage to the expected voltage difference. The operating voltage of the outdoor device is monitored in real time by a voltage sensor, and the expected output voltage value corresponding to the expected combined voltage is read from the battery management system of the vehicle battery.

[0165] Step 71: Generate a real-time operating voltage variation curve based on the real-time operating voltage.

[0166] The real-time operating voltage change curve is a curve formed by connecting the values ​​of the real-time operating voltage changes, such as... Figure 9 As shown in Figure a, a sliding window filter is used to remove high-frequency noise, while retaining the voltage trend, which is formed by fitting the real-time operating voltage value.

[0167] Step 72: Generate the expected voltage change curve based on the expected output voltage.

[0168] The processing of the expected voltage change curve is similar to step 71, and will not be repeated here. Figure 9 As shown in b.

[0169] Step 73: Process the real-time operating voltage change curve based on the preset normal fluctuation range of the real-time operating voltage to obtain the compensation change curve.

[0170] The normal fluctuation range of real-time operating voltage refers to the range within which the operating voltage of outdoor equipment is allowed to dynamically change during actual operation. This range is set by industry standards or equipment specifications. The compensation variation curve is a curve formed by connecting the values ​​obtained by subtracting the maximum and minimum values ​​of the normal fluctuation range of real-time operating voltage from each value of the real-time operating voltage variation curve. It is obtained by fitting each of the final values. For example... Figure 9 As shown in c.

[0171] Step 74: Process the expected voltage change curve based on the preset expected voltage change normal fluctuation range to obtain the fluctuation change curve.

[0172] The expected voltage fluctuation range refers to the range within which the battery voltage is allowed to dynamically change during actual operation. This range is set by industry standards or equipment specifications. The fluctuation curve is a curve formed by connecting the values ​​obtained by subtracting the maximum and minimum values ​​of the expected voltage fluctuation range from each value of the expected output voltage fluctuation curve. By fitting each of the final values, a curve can be obtained, such as... Figure 9 As shown in d.

[0173] Step 75: Perform data processing on the fluctuation change curve and the compensation change curve to obtain the fluctuation compensation change curve.

[0174] The values ​​of the above-generated fluctuation curve and compensation curve are superimposed, and the processed values ​​are fitted to generate another curve, called the fluctuation compensation curve, as shown below. Figure 9 As shown in e.

[0175] Step 76: Control the battery to adjust its voltage according to the fluctuation compensation curve.

[0176] The battery voltage is adjusted by the internal voltage regulator, the battery output voltage is monitored in real time and compared with the target curve, and the PWM duty cycle is dynamically adjusted by the PI regulator.

[0177] Reference Figure 10 A method for forming a combined voltage, the method comprising:

[0178] Step 20: Collect the output voltage of the vehicle battery corresponding to the matching voltage group.

[0179] Output voltage refers to the stable potential difference output by the vehicle battery under specific load and operating conditions. The actual output of the combined voltage is monitored in real time using a high-precision voltage sensor (sampling frequency ≥1kHz). Load current, temperature, and other parameters are simultaneously collected for subsequent fluctuation analysis.

[0180] Step 21: Generate an output voltage change curve based on the output voltage.

[0181] The output voltage variation curve is a voltage-time curve plotted based on the system's time-series voltage data. A sliding window filter (window length 50ms) is used to eliminate noise while preserving trend characteristics.

[0182] Step 22: Determine whether the output voltage change curve falls completely within the normal output fluctuation range.

[0183] The normal fluctuation range of the output voltage refers to the range within which the output voltage is allowed to change dynamically during actual operation. This range is set by industry standards or equipment specifications.

[0184] Step 220: Once the output voltage change curve falls completely within the normal output fluctuation range, the vehicle battery corresponding to the combined voltage will supply power to the outdoor equipment.

[0185] If the output voltage change curve falls completely within the normal output fluctuation range, it means that subtracting the maximum and minimum values ​​of each value from the expected normal voltage fluctuation range results in a curve that is completely within the expected normal voltage fluctuation range. In this case, the vehicle battery corresponding to the combined voltage can be directly used to power the outdoor equipment.

[0186] Step 221: For the voltage change curves that do not fall within the normal fluctuation range, decompose the voltage change curves to obtain individual voltage change curves.

[0187] If the voltage change curve contains parts that do not fall within the normal fluctuation range, it means that the curve obtained by subtracting the maximum and minimum values ​​of the expected voltage change normal fluctuation range from each value is not completely within the expected voltage change normal fluctuation range. The voltage curves of each individual cell obtained by using the Kalman filter method are called individual voltage change curves.

[0188] Step 2210: Calculate the degree of voltage fluctuation based on the individual voltage change curve.

[0189] Voltage fluctuation refers to the percentage of the maximum deviation of voltage from its rated value within a specific time period relative to the rated voltage.

[0190] Based on the degree of voltage fluctuation ,

[0191] Let i be the voltage value at the i-th sampling point. denoted as the average voltage, and n as the number of sampling points.

[0192] The degree of fluctuation of each voltage can be calculated using the above formula.

[0193] Step 2211: Select the vehicle voltage with the largest voltage fluctuation and define it as an unstable vehicle voltage.

[0194] The vehicle voltage with the largest fluctuation is obtained by filtering the fluctuation level calculated in step 2210. If multiple voltage sources are unstable, the one with the largest fluctuation is eliminated first by using the standard deviation σ.

[0195] Step 2212: Remove the unstable vehicle voltage from the matching voltage group and update the voltage change curve until the voltage change curve falls completely into the normal fluctuation range.

[0196] After removing the unstable voltage source, the combined curve of the remaining matching voltage group is recalculated; the judgment is repeated, the voltage change curve is decomposed, and the process of filtering out the vehicle voltage with the largest voltage fluctuation is carried out until the curve falls completely into the normal range.

[0197] Step 2213: After the output voltage change curve falls completely into the normal output fluctuation range, a combined voltage is formed based on the corresponding matching voltage group.

[0198] When the output voltage change curve falls completely within the normal output fluctuation range, it indicates that after falling completely within the normal output fluctuation range, the combined voltage is stabilized based on the corresponding matching voltage group, and the combined voltage is started to supply power to the outside.

[0199] A method for supplying power to outdoor equipment by forming a combined voltage based on the corresponding matching voltage group after the output voltage variation curve falls completely within the normal output fluctuation range, the method including:

[0200] Step 22130: If the voltage difference is less than or equal to the preset maximum battery voltage, then continue to step 3.

[0201] The maximum battery voltage refers to the maximum voltage value that the battery can be adjusted to. If the voltage difference is less than or equal to the preset maximum battery voltage, it means that the voltage provided by the stable voltage plus the maximum battery voltage after removing the unstable voltage can still supply power to the outdoor equipment normally, and proceed to step 3.

[0202] Step 22131: If the voltage difference is greater than the maximum battery voltage, the unstable vehicle voltage is regarded as a stable vehicle voltage, and the battery is put back into the matching voltage group and the process continues to step 6.

[0203] If the voltage difference is greater than the maximum battery voltage, it means that after removing the unstable voltage, it was found that the voltage provided by the stable voltage plus the maximum battery voltage is still insufficient to supply power to the outdoor equipment. It is necessary to put the unstable voltage back into the battery pack and continue to perform step 6 and subsequent operations. If the voltage difference is negative after putting it back, the combined voltage corresponding to the voltage difference is deleted and no further filtering is performed.

[0204] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for outdoor power supply of an in-vehicle battery, characterized by, The method comprises the following steps: Step 1: collecting the working voltage of the outdoor equipment in response to a preset power supply signal; Step 2: combining the vehicle voltages in any number of combinations to form a combined voltage based on the preset vehicle voltages; Step 3: defining the combined voltage as a matching combined voltage when the combined voltage is equal to the working voltage; Step 4: powering the outdoor equipment with the vehicle battery corresponding to the matching combined voltage; Step 5: calculating a voltage difference based on the combined voltage and the working voltage when the combined voltage is not equal to the working voltage; Step 6: selecting the combined voltage corresponding to the smallest value of the voltage difference and defining it as an expected combined voltage, and defining the voltage difference corresponding to the expected combined voltage as an expected voltage difference; Step 7: powering the outdoor equipment with the vehicle battery corresponding to the expected combined voltage after adjusting the voltage of the battery to the expected voltage difference, wherein the battery has a voltage regulator for adjusting the output voltage of the battery; Before collecting the working voltage of the outdoor equipment, the method further comprises the following steps: Step 8: collecting the current storage capacity of the battery and the current battery voltage; Step 9: forming a matching voltage group based on the vehicle voltages; Step 91: if the current storage capacity of the battery is greater than a preset power loss threshold, then starting to perform Step 1; Step 92: if the current storage capacity of the battery is less than the power loss threshold, then matching the vehicle voltage in the matching voltage group with the current battery voltage to obtain the same vehicle voltage, and defining the vehicle voltage as a matching vehicle voltage; Step 93: controlling the vehicle battery corresponding to the matching vehicle voltage to charge the battery until the current storage capacity of the battery is greater than the power loss threshold; The method further comprises a judgment method for controlling whether the vehicle battery corresponding to the matching vehicle voltage charges the battery, which comprises the following steps: Step 930: judging whether the matching vehicle voltage exists; Step 931: if the matching vehicle voltage exists, then controlling the vehicle battery corresponding to the matching vehicle voltage to charge the battery until the current storage capacity of the battery is greater than the power loss threshold; Step 932: if the matching vehicle voltage does not exist, then controlling the battery to adjust its voltage to the vehicle voltage closest to the current battery voltage, and defining the selected vehicle voltage as a target vehicle voltage; Step 933: controlling the vehicle battery corresponding to the target vehicle voltage to charge the battery until the current storage capacity of the battery is greater than the power loss threshold.

2. The method of claim 1, wherein, The method for controlling the vehicle battery corresponding to the matching vehicle voltage to charge the battery comprises the following steps: Step 934: collecting the current vehicle storage capacity of the vehicle battery corresponding to the matching vehicle voltage; Step 935: finding the corresponding normal working capacity threshold from a preset working database based on the matching vehicle voltage; Step 936: if the current vehicle storage capacity is greater than the normal working capacity threshold, then controlling the vehicle battery corresponding to the matching vehicle voltage to charge the battery. Step 937: If the current vehicle storage power is equal to the normal working power threshold, remove the matching vehicle voltage from the matching voltage group, and re-execute step 930.

3. The method of claim 2, wherein, Also included is a method for determining whether the control matching voltage corresponding to the vehicle battery charges the battery if the current vehicle storage power is greater than the normal working power threshold, which includes: Step 9360: Receive a preset external charging signal; Step 9361: Control the vehicle battery corresponding to the matching vehicle voltage to stop charging the battery when the external charging signal is received; Step 9362: If the current vehicle storage power is less than the normal working power threshold, control the external charging device to charge the vehicle battery corresponding to the matching vehicle voltage; Step 9363: If the current vehicle storage power is greater than the normal working power threshold, control the external charging device to charge the battery.

4. The method of claim 3, wherein, The method for controlling the vehicle battery corresponding to the matching vehicle voltage to stop charging the battery when the external charging signal is received includes: Step 93610: If the external charging signal is received and the power signal is not received at the same time, control the vehicle battery corresponding to the matching vehicle voltage to stop charging the battery; Step 93611: If the external charging signal is received and the power signal is received at the same time, determine whether the current vehicle storage power is greater than the current battery storage power; Step 93612: If the current vehicle storage power is greater than the current battery storage power, control the vehicle battery to supply power to the outdoor device, and control the external charging device to charge the battery; Step 93613: If the current vehicle storage power is less than the current battery storage power, control the battery to supply power to the outdoor device, and control the external charging device to charge the vehicle battery.

5. The method of claim 1, wherein, The method for controlling the vehicle battery corresponding to the matching vehicle voltage to charge the battery if the current battery storage power is less than the power loss threshold includes: Step 938: Execute a preset power-off protection instruction and output a preset alarm signal.

6. The method of claim 1, wherein, The specific method for controlling the battery to adjust its voltage to the expected voltage difference and the vehicle battery corresponding to the expected combined voltage to supply power to the outdoor device includes: Step 70: Collect the real-time working voltage of the outdoor device and the expected output voltage of the vehicle battery corresponding to the expected combined voltage; Step 71: Form a real-time working voltage change curve based on the real-time working voltage; Step 72: Form an expected voltage change curve based on the expected output voltage; Step 73: Process the real-time working voltage change curve based on a preset real-time working voltage normal fluctuation range to obtain a compensation change curve; Step 74: Process the expected voltage change curve based on the expected voltage change normal fluctuation range to obtain a fluctuation change curve; Step 75: Process the fluctuation change curve and the compensation change curve to obtain a fluctuation compensation change curve; Step 76: control the battery to adjust its voltage according to the fluctuation compensation curve.

7. The method of claim 1, wherein, The application also provides a method for forming the combined voltage, comprising: Step 20: collect the output voltage of the vehicle battery corresponding to the voltage group; Step 21: form an output voltage change curve based on the output voltage; Step 22: determine whether the output voltage change curve falls completely within the preset output normal fluctuation range; Step 220: if the output voltage change curve completely falls within the output normal fluctuation range, supply power to the outdoor equipment by the vehicle battery corresponding to the combined voltage; Step 221: if the output voltage change curve has a part curve that does not fall within the output normal fluctuation range, disassemble the output voltage change curve to obtain an individual voltage change curve; Step 2210: calculate the voltage fluctuation degree based on the individual voltage change curve; Step 2211: select the vehicle voltage with the largest voltage fluctuation degree as the unstable vehicle voltage; Step 2212: update the output voltage change curve after removing the unstable vehicle voltage from the voltage group until the output voltage change curve completely falls within the output normal fluctuation range; Step 2213: form the combined voltage based on the corresponding voltage group after the output voltage change curve completely falls within the output normal fluctuation range.

8. The method of claim 7, wherein, The application also provides a method for supplying power to the outdoor equipment by forming the combined voltage based on the corresponding voltage group after the output voltage change curve completely falls within the output normal fluctuation range, comprising: Step 22130: if the voltage difference is less than or equal to the preset maximum battery voltage, continue to perform step 3; Step 22131: if the voltage difference is greater than the maximum battery voltage, regard the unstable vehicle voltage as a stable vehicle voltage, and return it to the battery group and continue to perform step 6.

Images