Balancing conversion method, device and equipment of vehicle-mounted direct current power supply and storage medium

Abstract

The present application relates to the field of automatic driving control, and discloses a kind of equalization conversion method, device, equipment and storage medium of vehicle-mounted direct current power supply.The method comprises: obtaining target direct current power to be converted, and determining a plurality of direct current power supply modules corresponding to direct current conversion, and the original direct current voltage of each module;From each direct current power supply module, determine the main direct current power supply module and a plurality of sub direct current power supply modules, and respectively control each direct current power supply module to carry out step-up / down conversion, obtain target direct current voltage, first direct current and second direct current;Judge the size relationship between first direct current and each second direct current respectively, and adjust the second direct current output by each sub direct current power supply module;The output power of the equalization conversion of the main direct current power supply module and each sub direct current power supply module is controlled, and the equalization direct current power supply required by target vehicle is obtained.The present application improves the stability of direct current power supply after a plurality of direct current power supply modules carry out high-power direct current conversion.

Description

Technical Field

[0001] This invention relates to the field of autonomous driving control, and in particular to a method, apparatus, device, and storage medium for equalizing and converting on-board DC power supplies. Background Technology

[0002] With economic and social development, the demand for fossil fuels is increasing daily, leading to growing energy shortages and rising prices. To reduce fossil fuel consumption and achieve global carbon neutrality, developing electric vehicles to replace gasoline-powered cars has become urgent. Currently, electric vehicles use lithium batteries to provide the necessary power for driving and control. Since lithium batteries provide direct current (DC) power, different vehicle modules need to undergo necessary conversions to obtain the power required for their own operation, ensuring the normal functioning of each module.

[0003] Currently, for the power supply of some DC vehicle modules, DC-DC converters are used to directly convert the DC voltage provided by the vehicle's lithium battery to provide the DC power required for the normal operation of different vehicle modules. However, since some vehicle modules require a large rated power, it cannot be obtained through a single on-board DC power supply. The current corresponding to the DC power supply that achieves the required power through multiple DC converters is unstable, which can easily cause abnormal equipment operation (such as abnormal heating, excessive current burning out equipment, etc.). In other words, the power parameters of the high-power on-board module DC power supply in existing electric vehicles fluctuate greatly after DC-DC conversion, resulting in unstable DC power supply. Summary of the Invention

[0004] The main objective of this invention is to solve the problem of unstable power supply caused by large fluctuations in the power parameters of the high-power on-board module DC power supply after DC-DC conversion in existing electric vehicles.

[0005] The first aspect of the present invention provides a method for equalizing and converting a vehicle-mounted DC power supply. The method includes: acquiring the target DC power to be converted from a target vehicle; determining, based on the target DC power, multiple DC power supply modules corresponding to the DC conversion; and determining the original DC voltage of each DC power supply module within its corresponding voltage range; determining a main DC power supply module and multiple sub-DC power supply modules from among the DC power supply modules; and controlling the main DC power supply module and each sub-DC power supply module to perform buck-boost conversion to obtain a target DC voltage corresponding to the target DC power, a first DC current corresponding to the main DC power supply module, and a second DC current corresponding to each sub-DC power supply module; determining the magnitude relationship between the first DC current and each of the second DC currents to obtain a comparison result; and adjusting the second DC current output by each sub-DC power supply module based on the comparison result to obtain an adjustment result; and controlling the output power of the main DC power supply module and each sub-DC power supply module after parallel connection and equalization conversion to obtain the equalized DC power supply required by the target vehicle.

[0006] Optionally, in a first implementation of the first aspect of the present invention, determining the plurality of DC power supply modules corresponding to the DC conversion based on the target DC power, and determining the original DC voltage of the voltage range corresponding to each of the DC power supply modules, includes: calculating the plurality of target initial power supplies required for the DC conversion of the target DC power based on the preset initial power supplies corresponding to the plurality of DC power supply modules; selecting the plurality of DC power supply modules required for the DC conversion based on the target initial power supplies; and determining the original DC voltage of the voltage range corresponding to each of the DC power supply modules before equalization conversion.

[0007] Optionally, in a second implementation of the first aspect of the present invention, the step of controlling the main DC power supply module and each of the sub-DC power supply modules to perform buck-boost conversion to obtain a target DC voltage corresponding to the target DC power, a first DC current corresponding to the main DC power supply module, and a second DC current corresponding to each of the sub-DC power supply modules includes: determining the DC conversion voltage required by the target vehicle based on the target DC power; controlling the duty cycle corresponding to the voltage conversion of the main DC power supply module and each of the sub-DC power supply modules based on the DC conversion voltage; and performing buck-boost conversion on the original DC voltage based on the duty cycle to obtain a target DC voltage corresponding to a voltage threshold, a first DC current corresponding to the main DC power supply module, and a second DC current corresponding to each of the sub-DC power supply modules.

[0008] Optionally, in a third implementation of the first aspect of the present invention, the comparison result includes a first comparison result and a second comparison result. The step of determining the magnitude relationship between the first DC current and each of the second DC currents to obtain the comparison result includes: determining whether each of the second DC currents is greater than the first DC current; if the second DC current is greater than the first DC current, then determining that the second DC current output by the sub-DC power supply module corresponding to the second DC current is too large, and obtaining the first comparison result; if the second DC current is less than the first DC current, then determining that the second DC current output by the sub-DC power supply module corresponding to the second DC current is too small, and obtaining the second comparison result.

[0009] Optionally, in a fourth implementation of the first aspect of the present invention, the adjustment result includes a first adjustment result. The step of adjusting the second DC current output by each of the sub-DC power supply modules based on the comparison result to obtain the adjustment result includes: based on the first comparison result, reducing the duty cycle corresponding to the buck-boost conversion of the sub-DC power supply module, and based on the result of the reduced duty cycle, controlling the on / off timing of the voltage chopper of the sub-DC power supply module to obtain a new DC conversion voltage; based on the new DC conversion voltage, using the sub-DC power supply module to reduce the value of a preset feedback signal to obtain a new feedback signal; and based on the new feedback signal, reducing the output current of the sub-DC power supply module to obtain a new second DC current after current balancing, thereby generating the first adjustment result.

[0010] Optionally, in a fifth implementation of the first aspect of the present invention, the adjustment result includes a second adjustment result. The step of adjusting the second DC current output by each of the sub-DC power supply modules based on the comparison result to obtain the adjustment result includes: based on the second comparison result, increasing the output current value of the main DC power supply module until the output first DC current is greater than the second DC current, thus obtaining a new first DC current; based on the new first DC current, adjusting the output voltage of the sub-DC power supply module and the value of a preset feedback signal to obtain an adjusted DC conversion voltage and feedback signal; based on the adjusted DC conversion voltage and feedback signal, controlling the on / off timing of the voltage chopper of the sub-DC power supply module to obtain a new second DC current after current balancing, thereby generating the second adjustment result.

[0011] Optionally, in a sixth implementation of the first aspect of the present invention, the step of controlling the output power of the main DC power supply module and each of the sub-DC power supply modules after parallel connection and equalization conversion based on the adjustment result to obtain the equalized DC power supply required by the target vehicle includes: controlling the main DC power supply module and each of the sub-DC power supply modules to output target DC voltage and equalization DC current corresponding to equalization thresholds based on the adjustment result; and equalizing the output power of the target DC voltage and equalization DC current corresponding to each of the DC power supply modules after parallel connection and equalization conversion to obtain the equalized DC power supply required by the target vehicle.

[0012] A second aspect of the present invention provides an equalization conversion device for an on-board DC power supply, comprising: a power determination module, configured to acquire the target DC power to be converted in a target vehicle, and based on the target DC power, determine a plurality of DC power supply modules corresponding to the DC conversion, and determine the original DC voltage of the voltage range corresponding to each of the DC power supply modules; a power conversion module, configured to determine a main DC power supply module and a plurality of sub-DC power supply modules from the DC power supply modules, and control the main DC power supply module and each of the sub-DC power supply modules to perform buck-boost conversion respectively, to obtain a target DC voltage corresponding to the target DC power, a first DC current corresponding to the main DC power supply module, and a second DC current corresponding to each of the sub-DC power supply modules; a current equalization module, configured to determine the magnitude relationship between the first DC current and each of the second DC currents, obtain a comparison result, and based on the comparison result, adjust the second DC current output by each of the sub-DC power supply modules to obtain an adjustment result; and a power output module, configured to control the output power of the equalization conversion after the main DC power supply module and each of the sub-DC power supply modules are connected in parallel, based on the adjustment result, to obtain the equalized DC power supply required by the target vehicle.

[0013] Optionally, in a first implementation of the second aspect of the present invention, the power supply determination module includes: an initial calculation unit, configured to calculate multiple target initial power supplies required for the DC-DC conversion of the target DC power based on the preset initial power supplies corresponding to multiple DC power supply modules; a module selection unit, configured to select multiple DC power supply modules required for the DC-DC conversion based on the target initial power supplies; and an original determination unit, configured to determine the original DC voltage of each DC power supply module in the corresponding voltage range before equalization conversion.

[0014] Optionally, in a second implementation of the second aspect of the present invention, the power conversion module includes: a DC determination unit, configured to determine the DC conversion voltage required by the target vehicle based on the target DC power; a duty cycle conversion unit, configured to control the duty cycle corresponding to the voltage conversion of the main DC power supply module and each of the sub-DC power supply modules based on the DC conversion voltage; and a voltage conversion unit, configured to perform DC voltage buck-boost conversion on the original DC voltage based on the duty cycle to obtain a target DC voltage corresponding to a voltage threshold, a first DC current corresponding to the main DC power supply module, and a second DC current corresponding to each of the sub-DC power supply modules.

[0015] Optionally, in a third implementation of the second aspect of the present invention, the current balancing module includes: a current judgment unit, configured to determine whether each of the second DC currents is greater than the first DC current; a first comparison unit, configured to determine that if the second DC current is greater than the first DC current, the second DC current output by the sub-DC power supply module corresponding to the second DC current is too large, and obtain a first comparison result; and a second comparison unit, configured to determine that if the second DC current is less than the first DC current, the second DC current output by the sub-DC power supply module corresponding to the second DC current is too small, and obtain a second comparison result.

[0016] Optionally, in a fourth implementation of the second aspect of the present invention, the current balancing module includes: a first adjustment unit, configured to reduce the duty cycle corresponding to the buck-boost conversion of the sub-DC power supply module based on the first comparison result, and control the on / off timing of the voltage chopper of the sub-DC power supply module based on the result of the reduced duty cycle to obtain a new DC conversion voltage; a first conversion unit, configured to reduce the value of a preset feedback signal using the sub-DC power supply module based on the new DC conversion voltage to obtain a new feedback signal; and a first balancing unit, configured to reduce the output current of the sub-DC power supply module based on the new feedback signal to obtain a new second DC current after current balancing, and generate a first adjustment result.

[0017] Optionally, in a fifth implementation of the second aspect of the present invention, the current balancing module includes: a second adjustment unit, configured to increase the output current value of the main DC power supply module based on the second comparison result, until the output first DC current is greater than the second DC current, to obtain a new first DC current; a second conversion unit, configured to adjust the output voltage of the sub-DC power supply module and the value of a preset feedback signal based on the new first DC current, to obtain an adjusted DC conversion voltage and feedback signal; and a second balancing unit, configured to control the on / off timing of the voltage chopper of the sub-DC power supply module based on the adjusted DC conversion voltage and feedback signal, to obtain a new second DC current after current balancing, and to generate a second adjustment result.

[0018] Optionally, in a sixth implementation of the second aspect of the present invention, the power output module includes: an equalization output unit, used to control the main DC power supply module and each of the sub-DC power supply modules to output target DC voltage and equalization DC current corresponding to equalization thresholds based on the adjustment result; and a parallel output unit, used to connect the target DC voltage and equalization DC current corresponding to each of the DC power supply modules in parallel and then equalize the output power to obtain the equalization DC power required by the target vehicle.

[0019] A third aspect of the present invention provides an equalization conversion device for an on-board DC power supply, comprising: a memory and at least one processor, wherein the memory stores instructions; the at least one processor invokes the instructions in the memory to cause the equalization conversion device for the on-board DC power supply to perform the various steps of the above-described equalization conversion method for an on-board DC power supply.

[0020] A fourth aspect of the present invention provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the steps of the above-described vehicle DC power supply equalization conversion method.

[0021] In the technical solution provided by this invention, the target DC power to be converted from the target vehicle is obtained, and based on the target DC power, multiple DC power supply modules corresponding to the DC conversion are determined, as well as the original DC voltage of the corresponding voltage range of each DC power supply module is determined; from each DC power supply module, a main DC power supply module and multiple sub-DC power supply modules are determined, and the main DC power supply module and each sub-DC power supply module are controlled to perform step-up and step-down conversion respectively to obtain the target DC voltage corresponding to the target DC power, the first DC current corresponding to the main DC power supply module, and the second DC current corresponding to each sub-DC power supply module; the magnitude relationship between the first DC current and each second DC current is judged to obtain a comparison result, and based on the comparison result, the second DC current output by each sub-DC power supply module is adjusted to obtain an adjustment result; based on the adjustment result, the output power of the main DC power supply module and each sub-DC power supply module after parallel connection is controlled to equalize the conversion, thereby obtaining the balanced DC power supply required by the target vehicle. Compared to existing technologies, this application, in order to meet the needs of high-power DC power supply, obtains the target DC voltage and DC conversion current by performing DC wide voltage step-up / step-down conversion on multiple DC power supply modules, and balances the DC conversion current output by each sub-DC power supply module based on the main DC power supply module, and finally outputs the balanced DC power supply required by the target vehicle. This realizes that after the electric vehicle passes through multiple power supply modules for DC-DC conversion, it outputs a DC power supply with stable power parameters required by the high-power vehicle module. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the first embodiment of the equalization conversion method for vehicle-mounted DC power supply in this invention.

[0023] Figure 2 This is a schematic diagram of the equalization control structure between various DC power supply modules in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of a second embodiment of the equalization conversion method for vehicle-mounted DC power supply in this invention.

[0025] Figure 4 This is a schematic diagram of the third embodiment of the equalization conversion method for vehicle-mounted DC power supply in this invention;

[0026] Figure 5 This is a schematic diagram of one embodiment of the equalization conversion device for vehicle-mounted DC power supply in the present invention;

[0027] Figure 6 This is a schematic diagram of another embodiment of the vehicle-mounted DC power supply equalization conversion device in the present invention;

[0028] Figure 7 This is a schematic diagram of one embodiment of the equalization conversion device for vehicle-mounted DC power supply in this invention. Detailed Implementation

[0029] This invention provides a method, apparatus, device, and storage medium for equalizing and converting a vehicle-mounted DC power supply. The method includes: acquiring the target DC power to be converted from the target vehicle, determining multiple DC power supply modules corresponding to the DC conversion, and the original DC voltage of each module; determining a main DC power supply module and multiple sub-DC power supply modules from the DC power supply modules, and controlling each DC power supply module to perform buck-boost conversion to obtain the target DC voltage, a first DC current, and a second DC current; determining the magnitude relationship between the first DC current and each second DC current, and adjusting the second DC current output by each sub-DC power supply module; controlling the output power of the equalized conversion after the main DC power supply module and each sub-DC power supply module are connected in parallel to obtain the equalized DC power supply required by the target vehicle. This application improves the stability of the DC power supply after high-power DC conversion by multiple DC power supply modules.

[0030] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” or “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0031] For ease of understanding, the specific process of the embodiments of the present invention is described below. Please refer to [link / reference]. Figure 1 The first embodiment of the equalization conversion method for vehicle-mounted DC power supply in this invention includes:

[0032] 101. Obtain the target DC power to be converted from the target vehicle, and based on the target DC power, determine the multiple DC power supply modules corresponding to the DC conversion, and determine the original DC voltage of the corresponding voltage range of each DC power supply module;

[0033] The embodiments of this application can acquire and process relevant data based on artificial intelligence technology. Artificial intelligence (AI) refers to the theories, methods, technologies, and application systems that use digital computers or machines controlled by digital computers to simulate, extend, and expand human intelligence, perceive the environment, acquire knowledge, and use that knowledge to obtain optimal results.

[0034] Foundational technologies for artificial intelligence generally include sensors, dedicated AI chips, cloud computing, distributed storage, big data processing, operating / interactive systems, and mechatronics. AI software technologies mainly encompass computer vision, robotics, biometrics, speech processing, natural language processing, and machine learning / deep learning.

[0035] In this embodiment, the target DC power refers to the power required when the maximum output power of a single DC power supply module in the vehicle cannot meet the demand, and multiple DC power supply modules need to be connected in parallel to output the target DC power to provide the normal operation of the corresponding vehicle module. The DC power supply module refers to the corresponding DC power supply module of the vehicle. This application takes a power supply module with a power supply power of 200W and a wide voltage range of 9-16V corresponding to the original DC voltage as an example for explanation, and the target power supply is described as 1000W (12V regulated output) as an example.

[0036] In practical applications, the target DC power to be converted by the corresponding on-board module of the target vehicle (e.g., 1000W, 12V regulated DC power supply requirement) is obtained. Then, based on the preset initial power of multiple DC power supply modules, the initial power of multiple target power supplies required for DC-DC conversion of the target DC power is calculated. Based on the initial power of the target power supplies, multiple DC power supply modules required for DC-DC conversion are selected. Thus, the original DC voltage (9-16V wide voltage range) of the corresponding voltage range before equalization conversion of each DC power supply module is determined. Here, the output power (i.e., power supply specifications) of the DC power supply modules can be the same (i.e., the rated output power, voltage, and other parameters are the same) or different. The output parameters of each module are adjusted later to achieve the purpose of this application. This application uses DC power supply modules of the same specifications as an example for illustration.

[0037] 102. Determine the main DC power supply module and multiple sub-DC power supply modules from each DC power supply module, and control the main DC power supply module and each sub-DC power supply module to perform step-up and step-down conversion respectively to obtain the target DC voltage corresponding to the target DC power, the first DC current corresponding to the main DC power supply module and the second DC current corresponding to each sub-DC power supply module;

[0038] In this embodiment, the main DC power supply module and the sub-DC power supply modules refer to adjusting the output voltage and current of each sub-DC power supply module based on the output voltage and current of the main DC power supply module, so as to achieve a balanced output voltage and current between the main DC power supply module and the sub-DC power supply modules. That is, to achieve a power supply of 1000W, one 200W main DC power supply module and four 200W sub-DC power supply modules are needed to achieve balanced power supply. The buck-boost conversion refers to boosting or bucking the wide voltage (9-16V) of the corresponding DC power supply module to the target voltage (12V). The first DC current refers to the DC current output by the main DC power supply module when it outputs the corresponding power and the target voltage. The second DC current refers to the DC current output by the sub-DC power supply modules when they output the corresponding power and the target voltage.

[0039] In practical applications, one DC power supply module is selected as the main DC power supply module and the remaining DC power supply modules are selected as sub-DC power supply modules. Then, based on the target DC power, the DC conversion voltage required by the target vehicle is determined. Based on the DC conversion voltage, the duty cycle corresponding to the voltage conversion of the main DC power supply module and each sub-DC power supply module is controlled respectively. Based on the duty cycle, the original DC voltage is converted into a DC voltage step-up / step-down converter to obtain the target DC voltage corresponding to the voltage threshold, the first DC current corresponding to the main DC power supply module, and the second DC current corresponding to each sub-DC power supply module.

[0040] 103. Determine the magnitude relationship between the first DC current and each of the second DC currents, obtain the comparison results, and adjust the second DC current output by each sub-DC power supply module based on the comparison results to obtain the adjustment results;

[0041] In this embodiment, after converting each DC power supply module to its corresponding DC conversion voltage, in order to ensure the stability of the output power, it is necessary to ensure the balance of the output current of each DC power supply module, thereby achieving the stability of the final high-power power supply.

[0042] In practical applications, it is determined whether each second DC current is greater than the first DC current. If the second DC current is greater than the first DC current, it is determined that the second DC current output by the sub-DC power supply module corresponding to the second DC current is too large, and a first comparison result is obtained. Then, based on the first comparison result, the duty cycle corresponding to the buck-boost conversion of the sub-DC power supply module is reduced, and based on the result of the reduced duty cycle, the on / off timing of the voltage chopper of the sub-DC power supply module is controlled to obtain a new DC conversion voltage. Based on the new DC conversion voltage, the value of the preset feedback signal is reduced by the sub-DC power supply module to obtain a new feedback signal. Thus, based on the new feedback signal, the output current of the sub-DC power supply module is reduced to obtain a new second DC current after current balancing, generating a first adjustment result.

[0043] If the second DC current is less than the first DC current, it is determined that the second DC current output by the sub-DC power supply module corresponding to the second DC current is too small, resulting in a second comparison result. Based on this second comparison result, the output current value of the main DC power supply module is increased until the output first DC current is greater than the second DC current, resulting in a new first DC current. Based on this new first DC current, the output voltage of the sub-DC power supply module and the value of the preset feedback signal are adjusted to obtain the adjusted DC conversion voltage and feedback signal. Then, based on the adjusted DC conversion voltage and feedback signal, the on / off timing of the voltage chopper in the sub-DC power supply module is controlled to obtain a new second DC current after current balancing, generating the second adjustment result. The schematic diagram of the balancing control structure of the main DC power supply module and the sub-DC power supply module is shown below. Figure 2 As shown, Figure 2 In the upper part, the sub-(main) DC-DC converters of different DC power supply modules undergo filtering and current stabilization in the wide-voltage (9-16V) DC input EMC filter before being input to each DC-DC converter for output equalization conversion. Feedback equalization demodulation of the voltage and current of each DC-DC converter is achieved through a rail-to-rail output operational amplifier. That is, through... Figure 2In the lower part, the voltage and current parameters corresponding to each sub-DC power supply module are compared with the reference voltage and reference current parameters of the main DC power supply module, so as to finally output the balanced voltage V_CT_n and the balanced current I_out_n. The actual processing flow is as follows, taking the output voltage (V_IMON_3) (i.e., target DC voltage) and output current (I_OUT_3) (i.e., first DC current) of the main DC power supply module, the output voltages (V_IMON_n: including V_IMON_1, V_IMON_2, V_IMON_4, V_IMON_5) (i.e., target DC voltage) and output currents (I_OUT_n including I_OUT_1, I_OUT_2, I_OUT_4, I_OUT_5) of the four sub-DC power supply modules, and the final balanced DC power supply corresponding to the DC conversion voltage (V_CT_n) and balanced conversion current (I_OUT_n). When I_OUT_n is greater than I_OUT_3, since the output power is constant, the DC power supply module will reduce the output of the DC conversion voltage (V_CT_n), thereby reducing the value of the module's feedback signal and feeding it back to the corresponding sub-DC power supply module to reduce I_OUT_n. However, the reduction of I_OUT_n may cause I_OUT_n to be less than I_OUT_3. As a result, since the value of V_CT_n remains unchanged (because the target rated power of the vehicle module is the rated value of each instantaneous load (total load current rated), and the other sub-modules reduce their power, in order to keep the overall power supply constant, the main module can only control the output current to increase), I_OUT_3 will increase, which will cause I_OUT_n to be greater than I_OUT_3 again, thus regulating the current of the overall DC power supply module.

[0044] 104. Based on the adjustment results, control the output power of the main DC power supply module and each sub-DC power supply module after parallel connection and equalization conversion to obtain the equalized DC power supply required by the target vehicle.

[0045] In this embodiment, based on the adjustment results, the main DC power supply module and each sub-DC power supply module are controlled to output target DC voltage and equalization DC current corresponding to the equalization threshold. Then, the target DC voltage and equalization DC current of each DC power supply module are connected in parallel and the output power is equalized to obtain the equalized DC power supply required by the target vehicle. This achieves equalized output voltage and current after connecting each DC power supply module in parallel, ensuring stable power supply to the vehicle module and avoiding situations where the output current of the five DC power supply modules differs significantly, causing one or several modules to have a high load current while another one or several modules have a low load current. This can easily trigger OCP overcurrent protection or cause temperature imbalance, potentially burning out the vehicle module or leading to driving function failures.

[0046] In this embodiment of the invention, the target DC power to be converted from the target vehicle is obtained, and based on the target DC power, multiple DC power supply modules corresponding to the DC conversion are determined, as well as the original DC voltage of the corresponding voltage range of each DC power supply module is determined; a main DC power supply module and multiple sub-DC power supply modules are determined from each DC power supply module, and the main DC power supply module and each sub-DC power supply module are controlled to perform step-up and step-down conversion respectively to obtain the target DC voltage corresponding to the target DC power, the first DC current corresponding to the main DC power supply module, and the second DC current corresponding to each sub-DC power supply module; the magnitude relationship between the first DC current and each second DC current is determined to obtain a comparison result, and based on the comparison result, the second DC current output by each sub-DC power supply module is adjusted to obtain an adjustment result; based on the adjustment result, the output power of the main DC power supply module and each sub-DC power supply module after parallel connection is controlled to equalize the conversion, thereby obtaining the balanced DC power supply required by the target vehicle. Compared to existing technologies, this application, in order to meet the needs of high-power DC power supply, obtains the target DC voltage and DC conversion current by performing DC wide voltage step-up / step-down conversion on multiple DC power supply modules, and balances the DC conversion current output by each sub-DC power supply module based on the main DC power supply module, and finally outputs the balanced DC power supply required by the target vehicle. This realizes that after the electric vehicle passes through multiple power supply modules for DC-DC conversion, it outputs a DC power supply with stable power parameters required by the high-power vehicle module.

[0047] Please see Figure 3 The second embodiment of the equalization conversion method for vehicle-mounted DC power supply in this invention includes:

[0048] 201. Based on the preset initial power of multiple DC power supply modules, calculate the multiple target initial power of the power supply required for DC-DC conversion of the target power;

[0049] In this embodiment, the initial power of the power supply refers to the rated output power provided by the DC power supply module (this application takes 200W output by each DC power supply module as an example for explanation).

[0050] In practical applications, after obtaining the target DC power to be converted from the target vehicle, the initial power of the target power is calculated based on the initial power of the power supply corresponding to the preset DC power supply modules. For example, if the target DC power is 1000W, then five 200W DC power supply modules are needed. If the output power of each DC power supply module is different, then the output power of each module needs to be calculated and added together to meet the target DC power.

[0051] 202. Based on the initial power of the target power source, select multiple DC power supply modules required for DC-DC conversion;

[0052] In this embodiment, based on the initial power of the target power source, multiple DC power supply modules required for DC-DC conversion are selected, such as five 200W DC power supply modules.

[0053] 203. Determine the original DC voltage of each DC power supply module in the corresponding voltage range before equalization conversion;

[0054] In this embodiment, based on the design parameters of each DC power supply module, the original DC voltage of each DC power supply module in the corresponding voltage range before equalization conversion is determined (e.g., the original DC wide voltage of the DC power supply module is 9-16V).

[0055] 204. Based on the target DC power, determine the DC conversion voltage required by the target vehicle;

[0056] In this embodiment, after determining one main DC power supply module and multiple sub-DC power supply modules from among the DC power supply modules, the DC conversion voltage (e.g., 12V) required for the normal operation of the corresponding vehicle-mounted module of the target vehicle is determined based on the target DC power of 1000W.

[0057] 205. Based on the DC-DC conversion voltage, control the duty cycle corresponding to the voltage conversion of the main DC power supply module and each sub-DC power supply module respectively;

[0058] In this embodiment, based on the DC-DC conversion voltage, the duty cycle corresponding to the voltage conversion of the main DC power supply module and each sub-DC power supply module is controlled respectively. For example, for a DC power supply module whose original DC voltage is greater than the DC-DC conversion voltage, the duty cycle is reduced; for a DC power supply module whose original DC voltage is greater than the DC-DC conversion voltage, the duty cycle is increased.

[0059] 206. Based on the duty cycle, the original DC voltage is converted into a DC voltage step-up / step-down converter to obtain the target DC voltage corresponding to the voltage threshold, the first DC current corresponding to the main DC power supply module, and the second DC current corresponding to each sub-DC power supply module.

[0060] In this embodiment, based on the duty cycle, the original DC voltage of the DC power supply module corresponding to the reduced duty cycle is converted to a step-down DC voltage, and the original DC voltage of the DC power supply module corresponding to the increased duty cycle is converted to a step-up DC voltage. This allows the original DC voltages (9-16V) of each DC power supply module to be uniformly converted to a DC conversion voltage of 12V, thereby obtaining the target DC voltage corresponding to the voltage threshold, the first DC current corresponding to the main DC power supply module, and the second DC current corresponding to each sub-DC power supply module.

[0061] 207. Determine the magnitude relationship between the first DC current and each of the second DC currents, obtain the comparison results, and adjust the second DC current output by each sub-DC power supply module based on the comparison results to obtain the adjustment results;

[0062] 208. Based on the adjustment results, control the output power of the main DC power supply module and each sub-DC power supply module after parallel connection and equalization conversion to obtain the equalized DC power supply required by the target vehicle.

[0063] In this embodiment of the invention, by selecting the number and power value of DC power supply modules corresponding to the target DC power, and then performing step-up and step-down conversion on each DC power supply module, the target DC voltage corresponding to the voltage threshold, the first DC current corresponding to the main DC power supply module, and the second DC current corresponding to each sub-DC power supply module are obtained. This enables the subsequent electric vehicle to output a DC power supply with stable power parameters required by the high-power on-board module after DC-DC conversion by multiple power supply modules.

[0064] Please see Figure 4 The third embodiment of the equalization conversion method for vehicle-mounted DC power supply in this invention includes:

[0065] 301. Obtain the target DC power to be converted from the target vehicle, and based on the target DC power, determine the multiple DC power supply modules corresponding to the DC conversion, and determine the original DC voltage of the voltage range corresponding to each DC power supply module;

[0066] 302. Determine the main DC power supply module and multiple sub-DC power supply modules from each DC power supply module, and control the main DC power supply module and each sub-DC power supply module to perform step-up and step-down conversion respectively to obtain the target DC voltage corresponding to the target DC power, the first DC current corresponding to the main DC power supply module and the second DC current corresponding to each sub-DC power supply module;

[0067] 303. Determine whether each second DC current is greater than the first DC current;

[0068] In this embodiment, it is determined whether the voltage value of each second DC current is greater than the voltage value of the first DC current.

[0069] 304. If the second DC current is greater than the first DC current, then it is determined that the second DC current output by the sub-DC power supply module corresponding to the second DC current is too large, and the first comparison result is obtained.

[0070] In this embodiment, if the second DC current is greater than the first DC current, it is determined that the second DC current value output by the sub-DC power supply module corresponding to the second DC current is too large, and the first comparison result is obtained.

[0071] 305. If the second DC current is less than the first DC current, then it is determined that the second DC current output by the sub-DC power supply module corresponding to the second DC current is too small, and a second comparison result is obtained;

[0072] In this embodiment, if the second DC current is less than the first DC current, it is determined that the second DC current value output by the sub-DC power supply module corresponding to the second DC current is too small, and a second comparison result is obtained.

[0073] 306. Based on the first comparison result, reduce the duty cycle corresponding to the buck-boost conversion of the sub-DC power supply module, and based on the result of the reduced duty cycle, control the on / off timing of the voltage chopper of the sub-DC power supply module to obtain a new DC conversion voltage;

[0074] In this embodiment, based on the first comparison result, by reducing the duty cycle corresponding to the buck-boost conversion of the sub-DC power supply module, the on / off timing of the voltage chopper of the corresponding sub-DC power supply module is controlled, thereby reducing the voltage value output by the sub-DC power supply module and obtaining a new DC conversion voltage.

[0075] 307. Based on the new DC-DC conversion voltage, the value of the preset feedback signal is reduced by using the sub-DC power supply module to obtain a new feedback signal;

[0076] In this embodiment, based on the new DC-DC conversion voltage, since the voltage value corresponding to the new DC-DC conversion voltage is reduced, the voltage value of the preset feedback signal is reduced by the sub-DC power supply module, thereby obtaining a new feedback signal.

[0077] 308. Based on the new feedback signal, reduce the output current of the sub-DC power supply module to obtain a new second DC current after current balancing, and generate the first adjustment result;

[0078] In this embodiment, based on the new feedback signal, and under the premise that the output power remains unchanged, the output current of the sub-DC power supply module is reduced (i.e., the output current is finely reduced while ensuring that the output voltage is relatively stable), and a new second DC current after current balancing is obtained, thus generating the first adjustment result.

[0079] Furthermore, based on the second comparison result, by increasing the duty cycle corresponding to the buck-boost conversion of the sub-DC power supply module, the on / off timing of the voltage chopper of the corresponding sub-DC power supply module is controlled, thereby increasing the output voltage value of the sub-DC power supply module and obtaining a new DC conversion voltage. Then, based on the new DC conversion voltage, since the voltage value corresponding to the new DC conversion voltage increases, the voltage value of the preset feedback signal is increased by the sub-DC power supply module, thereby obtaining a new feedback signal. Based on the new feedback signal, under the premise of constant output power, by increasing the output current of the sub-DC power supply module (i.e., finely adjusting the increase of the output current while ensuring relatively stable output voltage), a new second DC current after current balancing is obtained, generating a second adjustment result.

[0080] 309. Based on the adjustment results, control the main DC power supply module and each sub-DC power supply module to output the target DC voltage and equalization DC current corresponding to the equalization threshold;

[0081] In this embodiment, based on the adjustment results, the output voltage and current of the main DC power supply module are used as a reference to control the main DC power supply module and each sub-DC power supply module to output the target DC voltage and balanced DC current corresponding to the equalization threshold.

[0082] 310. Connect the target DC voltage and equalizing DC current corresponding to each DC power supply module in parallel and then equalize the output power to obtain the equalizing DC power required by the target vehicle.

[0083] In this embodiment, the target DC voltage and equalizing DC current corresponding to each DC power supply module are connected in parallel and then converted into corresponding regulated output power to obtain the equalized DC power supply required by the target vehicle.

[0084] In this embodiment of the invention, in order to meet the needs of high-power DC power supply, the target DC voltage and DC conversion current are obtained by performing DC wide voltage step-up and step-down conversion on multiple DC power supply modules. Based on the main DC power supply module, the DC conversion current output by each sub-DC power supply module is balanced, and finally the balanced DC power supply required by the target vehicle is output. This realizes that after the electric vehicle passes through multiple power supply modules for DC-DC conversion, it outputs a DC power supply with stable power parameters required by the high-power vehicle module.

[0085] The equalization conversion method for the vehicle-mounted DC power supply in the embodiments of the present invention has been described above. The equalization conversion device for the vehicle-mounted DC power supply in the embodiments of the present invention will be described below. Please refer to [link / reference]. Figure 5 One embodiment of the equalization conversion device for vehicle-mounted DC power supply in this invention includes:

[0086] The power supply determination module 401 is used to obtain the target DC power to be converted in the target vehicle, and based on the target DC power, determine multiple DC power supply modules corresponding to the DC conversion, and determine the original DC voltage of the voltage range corresponding to each DC power supply module.

[0087] The power conversion module 402 is used to determine the main DC power supply module and multiple sub-DC power supply modules from each of the DC power supply modules, and control the main DC power supply module and each of the sub-DC power supply modules to perform buck-boost conversion to obtain the target DC voltage corresponding to the target DC power, the first DC current corresponding to the main DC power supply module and the second DC current corresponding to each of the sub-DC power supply modules;

[0088] The current balancing module 403 is used to determine the magnitude relationship between the first DC current and each of the second DC currents, obtain a comparison result, and adjust the second DC current output by each of the sub-DC power supply modules based on the comparison result to obtain an adjustment result;

[0089] The power output module 404 is used to control the output power of the main DC power supply module and each of the sub-DC power supply modules after parallel connection and equalization based on the adjustment result, so as to obtain the equalized DC power supply required by the target vehicle.

[0090] In this embodiment of the invention, the target DC power to be converted from the target vehicle is obtained, and based on the target DC power, multiple DC power supply modules corresponding to the DC conversion are determined, as well as the original DC voltage of the corresponding voltage range of each DC power supply module is determined; a main DC power supply module and multiple sub-DC power supply modules are determined from each DC power supply module, and the main DC power supply module and each sub-DC power supply module are controlled to perform step-up and step-down conversion respectively to obtain the target DC voltage corresponding to the target DC power, the first DC current corresponding to the main DC power supply module, and the second DC current corresponding to each sub-DC power supply module; the magnitude relationship between the first DC current and each second DC current is determined to obtain a comparison result, and based on the comparison result, the second DC current output by each sub-DC power supply module is adjusted to obtain an adjustment result; based on the adjustment result, the output power of the main DC power supply module and each sub-DC power supply module after parallel connection is controlled to equalize the conversion, thereby obtaining the balanced DC power supply required by the target vehicle. Compared to existing technologies, this application, in order to meet the needs of high-power DC power supply, obtains the target DC voltage and DC conversion current by performing DC wide voltage step-up / step-down conversion on multiple DC power supply modules, and balances the DC conversion current output by each sub-DC power supply module based on the main DC power supply module, and finally outputs the balanced DC power supply required by the target vehicle. This realizes that after the electric vehicle passes through multiple power supply modules for DC-DC conversion, it outputs a DC power supply with stable power parameters required by the high-power vehicle module.

[0091] Please see Figure 6 Another embodiment of the equalization conversion device for vehicle-mounted DC power supply in this invention includes:

[0092] The power supply determination module 401 is used to obtain the target DC power to be converted in the target vehicle, and based on the target DC power, determine multiple DC power supply modules corresponding to the DC conversion, and determine the original DC voltage of the voltage range corresponding to each DC power supply module.

[0093] The power conversion module 402 is used to determine the main DC power supply module and multiple sub-DC power supply modules from each of the DC power supply modules, and control the main DC power supply module and each of the sub-DC power supply modules to perform buck-boost conversion to obtain the target DC voltage corresponding to the target DC power, the first DC current corresponding to the main DC power supply module and the second DC current corresponding to each of the sub-DC power supply modules;

[0094] The current balancing module 403 is used to determine the magnitude relationship between the first DC current and each of the second DC currents, obtain a comparison result, and adjust the second DC current output by each of the sub-DC power supply modules based on the comparison result to obtain an adjustment result;

[0095] The power output module 404 is used to control the output power of the main DC power supply module and each of the sub-DC power supply modules after parallel connection and equalization based on the adjustment result, so as to obtain the equalized DC power supply required by the target vehicle.

[0096] Furthermore, the power supply determination module 401 includes:

[0097] The initial calculation unit 4011 is used to calculate the multiple target power initials required for the DC-DC conversion of the target power based on the preset initial power of the power supply corresponding to multiple DC power supply modules; the module selection unit 4012 is used to select multiple DC power supply modules required for DC-DC conversion based on the target power initials; and the original determination unit 4013 is used to determine the original DC voltage of the corresponding voltage range before equalization conversion of each DC power supply module.

[0098] Furthermore, the power conversion module 402 includes:

[0099] The DC determination unit 4021 is used to determine the DC conversion voltage required by the target vehicle based on the target DC power; the duty cycle conversion unit 4022 is used to control the duty cycle corresponding to the voltage conversion of the main DC power supply module and each of the sub-DC power supply modules based on the DC conversion voltage; the voltage conversion unit 4023 is used to perform DC voltage buck-boost conversion on the original DC voltage based on the duty cycle to obtain the target DC voltage corresponding to the voltage threshold, the first DC current corresponding to the main DC power supply module, and the second DC current corresponding to each of the sub-DC power supply modules.

[0100] Furthermore, the current equalization module 403 includes:

[0101] The current judgment unit 4031 is used to determine whether each second DC current is greater than the first DC current; the first comparison unit 4032 is used to determine that if the second DC current is greater than the first DC current, the second DC current output by the sub-DC power supply module corresponding to the second DC current is too large, and obtain a first comparison result; the second comparison unit 4033 is used to determine that if the second DC current is less than the first DC current, the second DC current output by the sub-DC power supply module corresponding to the second DC current is too small, and obtain a second comparison result.

[0102] Furthermore, the current equalization module 403 includes:

[0103] The first adjustment unit 4034 is used to reduce the duty cycle corresponding to the buck-boost conversion of the sub-DC power supply module based on the first comparison result, and control the on / off timing of the voltage chopper of the sub-DC power supply module based on the result of the reduced duty cycle to obtain a new DC conversion voltage; the first conversion unit 4035 is used to reduce the value of the preset feedback signal by the sub-DC power supply module based on the new DC conversion voltage to obtain a new feedback signal; the first equalization unit 4036 is used to reduce the output current of the sub-DC power supply module based on the new feedback signal to obtain a new second DC current after current equalization, and generate the first adjustment result.

[0104] Furthermore, the current equalization module 403 includes:

[0105] The second adjustment unit 4037 is used to increase the output current value of the main DC power supply module based on the second comparison result, until the output first DC current is greater than the second DC current, to obtain a new first DC current; the second conversion unit 4038 is used to adjust the output voltage of the sub-DC power supply module and the value of the preset feedback signal based on the new first DC current, to obtain the adjusted DC conversion voltage and feedback signal; the second equalization unit 4039 is used to control the on / off timing of the voltage chopper of the sub-DC power supply module based on the adjusted DC conversion voltage and feedback signal, to obtain a new second DC current after current equalization, and generate a second adjustment result.

[0106] Furthermore, the power output module 404 includes:

[0107] The equalization output unit 4041 is used to control the main DC power supply module and each of the sub-DC power supply modules to output target DC voltage and equalization DC current corresponding to the equalization threshold based on the adjustment result; and the parallel output unit 4042 is used to connect the target DC voltage and equalization DC current corresponding to each of the DC power supply modules in parallel and then equalize the output power to obtain the equalization DC power required by the target vehicle.

[0108] In this embodiment of the invention, the target DC power to be converted from the target vehicle is obtained, and based on the target DC power, multiple DC power supply modules corresponding to the DC conversion are determined, as well as the original DC voltage of the corresponding voltage range of each DC power supply module is determined; a main DC power supply module and multiple sub-DC power supply modules are determined from each DC power supply module, and the main DC power supply module and each sub-DC power supply module are controlled to perform step-up and step-down conversion respectively to obtain the target DC voltage corresponding to the target DC power, the first DC current corresponding to the main DC power supply module, and the second DC current corresponding to each sub-DC power supply module; the magnitude relationship between the first DC current and each second DC current is determined to obtain a comparison result, and based on the comparison result, the second DC current output by each sub-DC power supply module is adjusted to obtain an adjustment result; based on the adjustment result, the output power of the main DC power supply module and each sub-DC power supply module after parallel connection is controlled to equalize the conversion, thereby obtaining the balanced DC power supply required by the target vehicle. Compared to existing technologies, this application, in order to meet the needs of high-power DC power supply, obtains the target DC voltage and DC conversion current by performing DC wide voltage step-up / step-down conversion on multiple DC power supply modules, and balances the DC conversion current output by each sub-DC power supply module based on the main DC power supply module, and finally outputs the balanced DC power supply required by the target vehicle. This realizes that after the electric vehicle passes through multiple power supply modules for DC-DC conversion, it outputs a DC power supply with stable power parameters required by the high-power vehicle module.

[0109] above Figure 5 and Figure 6 The equalization conversion device for vehicle-mounted DC power supply in this embodiment of the invention is described in detail from the perspective of modular functional entities. The equalization conversion device for vehicle-mounted DC power supply in this embodiment of the invention is described in detail below from the perspective of hardware processing.

[0110] Figure 7This is a schematic diagram of the structure of an equalization conversion device for a vehicle-mounted DC power supply according to an embodiment of the present invention. The equalization conversion device 600 can vary significantly due to different configurations or performance characteristics. It may include one or more central processing units (CPUs) 610 (e.g., one or more processors) and a memory 620, and one or more storage media 630 (e.g., one or more mass storage devices) storing application programs 633 or data 632. The memory 620 and storage media 630 can be temporary or persistent storage. The program stored in the storage media 630 may include one or more modules (not shown in the diagram), each module including a series of instruction operations on the equalization conversion device 600. Furthermore, the processor 610 may be configured to communicate with the storage media 630 and execute the series of instruction operations in the storage media 630 on the equalization conversion device 600.

[0111] The vehicle-mounted DC power supply equalization conversion device 600 may also include one or more power supplies 640, one or more wired or wireless network interfaces 650, one or more input / output interfaces 660, and / or one or more operating systems 631, such as Windows Server, Mac OS X, Unix, Linux, FreeBSD, etc. Those skilled in the art will understand that... Figure 7 The illustrated equalization conversion device structure for vehicle DC power supplies does not constitute a limitation on the equalization conversion device for vehicle DC power supplies. It may include more or fewer components than illustrated, or combine certain components, or have different component arrangements.

[0112] The present invention also provides an equalization conversion device for vehicle-mounted DC power supplies. The computer device includes a memory and a processor. The memory stores computer-readable instructions. When the computer-readable instructions are executed by the processor, the processor performs each step of the equalization conversion method for vehicle-mounted DC power supplies in the above embodiments.

[0113] The present invention also provides a computer-readable storage medium, which can be a non-volatile computer-readable storage medium or a volatile computer-readable storage medium, wherein the computer-readable storage medium stores instructions that, when the instructions are executed on a computer, cause the computer to perform each step of the equalization conversion method of the vehicle DC power supply.

[0114] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0115] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0116] This application can be used in a wide variety of general-purpose or special-purpose computer system environments or configurations. Examples include: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, and distributed computing environments including any of the above systems or devices. This application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform specific tasks or implement specific abstract data types. This application can also be practiced in distributed computing environments where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program modules can reside in local and remote computer storage media, including storage devices.

[0117] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for equalizing and converting on-board DC power supplies, characterized in that, The equalization conversion method of the on-board DC power supply includes: The target DC power to be converted in the target vehicle is obtained, and based on the target DC power, multiple DC power supply modules corresponding to the DC conversion are determined, as well as the original DC voltage of the voltage range corresponding to each DC power supply module is determined; A main DC power supply module and multiple sub-DC power supply modules are determined from each DC power supply module, and the main DC power supply module and each of the sub-DC power supply modules are controlled to perform buck-boost conversion to obtain the target DC voltage corresponding to the target DC power, the first DC current corresponding to the main DC power supply module, and the second DC current corresponding to each of the sub-DC power supply modules. The magnitude relationship between the first DC current and each of the second DC currents is determined to obtain a comparison result. Based on the comparison result, the second DC current output by each of the sub-DC power supply modules is adjusted to obtain an adjustment result. Based on the adjustment results, the output power of the main DC power supply module and each of the sub-DC power supply modules connected in parallel and then balanced is controlled to obtain the balanced DC power supply required by the target vehicle. The step of controlling the main DC power supply module and each of the sub-DC power supply modules to perform buck-boost conversion to obtain a target DC voltage corresponding to the target DC power, a first DC current corresponding to the main DC power supply module, and a second DC current corresponding to each of the sub-DC power supply modules includes: determining the DC conversion voltage required by the target vehicle based on the target DC power; controlling the duty cycle corresponding to the voltage conversion of the main DC power supply module and each of the sub-DC power supply modules based on the DC conversion voltage; and performing buck-boost conversion on the original DC voltage based on the duty cycle to obtain a target DC voltage corresponding to a voltage threshold, a first DC current corresponding to the main DC power supply module, and a second DC current corresponding to each of the sub-DC power supply modules. The comparison results include a first comparison result and a second comparison result. Determining the magnitude relationship between the first DC current and each of the second DC currents to obtain the comparison results includes: determining whether each of the second DC currents is greater than the first DC current; if the second DC current is greater than the first DC current, then determining that the second DC current output by the sub-DC power supply module corresponding to the second DC current is too large, thus obtaining a first comparison result; if the second DC current is less than the first DC current, then determining that the second DC current output by the sub-DC power supply module corresponding to the second DC current is too small, thus obtaining a second comparison result. The adjustment result includes a first adjustment result. The step of adjusting the second DC current output by each of the sub-DC power supply modules based on the comparison result to obtain the adjustment result includes: based on the first comparison result, reducing the duty cycle corresponding to the buck-boost conversion of the sub-DC power supply module, and based on the result of the reduced duty cycle, controlling the on / off timing of the voltage chopper of the sub-DC power supply module to obtain a new DC conversion voltage; based on the new DC conversion voltage, using the sub-DC power supply module to reduce the value of a preset feedback signal to obtain a new feedback signal; based on the new feedback signal, reducing the output current of the sub-DC power supply module to obtain a new second DC current after current balancing, thus generating the first adjustment result.

2. The equalization conversion method for on-board DC power supply according to claim 1, characterized in that, The step of determining multiple DC power supply modules corresponding to the DC conversion based on the target DC power, and determining the original DC voltage of the corresponding voltage range of each DC power supply module, includes: Based on the preset initial power of multiple DC power supply modules, the multiple target initial power of the power supply required for DC-DC conversion of the target DC power is calculated. Based on the initial power of the target power source, select multiple DC power supply modules required for DC-DC conversion; The original DC voltage of each DC power supply module in the corresponding voltage range before equalization conversion is determined.

3. The equalization conversion method for on-board DC power supply according to claim 1, characterized in that, The adjustment result includes a second adjustment result. The adjustment of the second DC current output by each of the sub-DC power supply modules based on the comparison result to obtain the adjustment result includes: Based on the second comparison result, the output current value is increased by using the main DC power supply module until the output first DC current is greater than the second DC current, and a new first DC current is obtained. Based on the new first DC current, the output voltage of the sub-DC power supply module and the value of the preset feedback signal are adjusted to obtain the adjusted DC conversion voltage and feedback signal; Based on the adjusted DC conversion voltage and feedback signal, the on / off timing of the voltage chopping of the sub-DC power supply module is controlled to obtain a new second DC current after current balancing, and a second adjustment result is generated.

4. The equalization conversion method for on-board DC power supply according to claim 1, characterized in that, Based on the adjustment results, controlling the output power of the main DC power supply module and each of the sub-DC power supply modules after parallel connection and equalization conversion to obtain the equalized DC power supply required by the target vehicle includes: Based on the adjustment results, the main DC power supply module and each of the sub-DC power supply modules are controlled to output target DC voltage and equalization DC current corresponding to the equalization threshold. The target DC voltage and equalizing DC current corresponding to each of the DC power supply modules are connected in parallel and then the output power is equalized to obtain the equalized DC power supply required by the target vehicle.

5. A vehicle-mounted DC power supply equalization conversion device, characterized in that, The equalization conversion device of the vehicle-mounted DC power supply includes: The power supply determination module is used to obtain the target DC power to be converted in the target vehicle, and based on the target DC power, determine multiple DC power supply modules corresponding to the DC conversion, and determine the original DC voltage of the voltage range corresponding to each DC power supply module; The power conversion module is used to determine the main DC power supply module and multiple sub-DC power supply modules from the DC power supply modules, and control the main DC power supply module and each of the sub-DC power supply modules to perform buck-boost conversion to obtain the target DC voltage corresponding to the target DC power, the first DC current corresponding to the main DC power supply module and the second DC current corresponding to each of the sub-DC power supply modules; A current balancing module is used to determine the magnitude relationship between the first DC current and each of the second DC currents, obtain a comparison result, and adjust the second DC current output by each of the sub-DC power supply modules based on the comparison result to obtain an adjustment result; The power output module is used to control the output power of the main DC power supply module and each of the sub-DC power supply modules after parallel connection and equalization based on the adjustment result, so as to obtain the equalized DC power supply required by the target vehicle. The method of controlling the main DC power supply module and each of the sub-DC power supply modules to perform buck-boost conversion to obtain the target DC voltage corresponding to the target DC power, the first DC current corresponding to the main DC power supply module, and the second DC current corresponding to each of the sub-DC power supply modules is specifically used for: determining the DC conversion voltage required by the target vehicle based on the target DC power; controlling the duty cycle corresponding to the voltage conversion of the main DC power supply module and each of the sub-DC power supply modules based on the DC conversion voltage; and performing buck-boost conversion on the original DC voltage based on the duty cycle to obtain the target DC voltage corresponding to the voltage threshold, the first DC current corresponding to the main DC power supply module, and the second DC current corresponding to each of the sub-DC power supply modules. The comparison results include a first comparison result and a second comparison result. Specifically, determining the magnitude relationship between the first DC current and each of the second DC currents to obtain the comparison results involves: determining whether each of the second DC currents is greater than the first DC current; if the second DC current is greater than the first DC current, then determining that the second DC current output by the sub-DC power supply module corresponding to the second DC current is too large, thus obtaining the first comparison result; if the second DC current is less than the first DC current, then determining that the second DC current output by the sub-DC power supply module corresponding to the second DC current is too small, thus obtaining the second comparison result. The adjustment result includes a first adjustment result. Specifically, the adjustment of the second DC current output by each of the sub-DC power supply modules based on the comparison result is used to: reduce the duty cycle corresponding to the buck-boost conversion of the sub-DC power supply module based on the first comparison result, and control the on / off timing of the voltage chopper of the sub-DC power supply module based on the reduction in duty cycle to obtain a new DC conversion voltage; based on the new DC conversion voltage, reduce the value of a preset feedback signal using the sub-DC power supply module to obtain a new feedback signal; and based on the new feedback signal, reduce the output current of the sub-DC power supply module to obtain a new second DC current after current balancing, generating the first adjustment result.

6. A vehicle-mounted DC power supply equalization conversion device, characterized in that, The equalization conversion device of the vehicle-mounted DC power supply includes: a memory and at least one processor, wherein the memory stores instructions; The at least one processor invokes the instructions in the memory to cause the vehicle DC power supply equalization conversion device to perform the steps of the vehicle DC power supply equalization conversion method as described in any one of claims 1-4.

7. A computer-readable storage medium storing instructions thereon, characterized in that, When the instruction is executed by the processor, it implements the steps of the equalization conversion method for the vehicle-mounted DC power supply as described in any one of claims 1-4.

Images