Coordination control method of DCDC and generator for hybrid electric vehicle

Abstract

The invention discloses a DCDC and generator coordination control method for a hybrid electric vehicle, and relates to the technical field of hybrid electric vehicles, and the method comprises the steps: obtaining a voltage value of a storage battery; when the whole vehicle is in an ON gear, the DCDC is controlled to output a DCDC output voltage value to the storage battery; when the whole vehicle is in a START gear, a high-voltage system is normal and an engine is started, a DCDC output voltage value, a DCDC output power value, a generator target output voltage value and a generator output power value are obtained; and controlling the output states of the DCDC and the generator according to the storage battery voltage value, the DCDC output voltage value, the DCDC output power value, the target output voltage value of the generator and the output power value of the generator. The vehicle is provided with the low-power high-voltage DCDC and the engine driven generator at the same time, the DCDC and the generator are coordinated to work, the DCDC and the generator are matched, the DCDC and the generator are fully utilized for efficient output at the lowest cost and the highest utilization rate, and sufficient low-voltage power supply is provided for vehicle running.

Description

Technical Field

[0001] The present invention relates to the technical field of hybrid vehicles, and in particular to a coordinated control method of a DC / DC and a generator for a hybrid vehicle. Background Art

[0002] With the improvement of living standards, the sales volume and market share of new energy vehicles continue to increase. Among them, hybrid vehicles are favored by users due to their advantages such as being able to run on oil or electricity, no mileage worries, and road rights, and have become the first choice for many passenger car and commercial vehicle owners.

[0003] Most of the current hybrid vehicles are equipped with only high-voltage DCDC, which supplies power to the low-voltage system through high-voltage DCDC. When the high-voltage system of the vehicle fails and only the engine is driven, or when the DCDC fails, the low-voltage system cannot be powered, causing the battery to run out of power. During the operation of the vehicle, due to different operating conditions, the use of low-voltage electrical components and other components is different. Under certain extreme conditions, the power demand is relatively large. If configured according to the daily working conditions of the vehicle, the selected DCDC will not be able to meet the power supply requirements of extreme conditions. If configured according to extreme conditions, the selected DCDC will not be able to operate at full load or near full load most of the time, resulting in power waste. At the same time, the current market vehicle DCDC optional configuration is mostly developed based on a fixed power platform, and when configuring products, only developed DCDC platform products can be selected, or customized development can be carried out. Due to the different configuration of components such as electrical components in the vehicle, some models may have the problem of large or small optional DCDC power when configured according to the existing DCDC platform, resulting in increased component power waste costs, or insufficient power affecting use. Or DCDC customized development is carried out, resulting in a surge in product development costs. When the vehicle is only equipped with DCDC, in case of DCDC failure or high-voltage system failure, the DCDC cannot work, resulting in no low-voltage power supply for the vehicle, and the vehicle cannot be driven after the power stored in the battery is exhausted. Similarly, when the vehicle is only equipped with a generator, the vehicle will also be unable to drive if it is driven in pure electric mode or the generator fails. Summary of the invention

[0004] The present application provides a coordinated control method of a DCDC and a generator for a hybrid vehicle to at least solve one technical problem existing in the related art.

[0005] The coordinated control method of the DCDC and the generator for the hybrid vehicle comprises: obtaining a battery voltage value; when the vehicle is in the ON gear, controlling the DCDC to output the DCDC output voltage value to the battery; when the vehicle is in the START gear, the high-voltage system is normal and the engine is started: obtaining the DCDC output voltage value, the DCDC output power value, the generator target output voltage value and the generator output power value; and controlling the output states of the DCDC and the generator according to the battery voltage value, the DCDC output voltage value, the DCDC output power value, the generator target output voltage value and the generator output power value.

[0006] As an optional implementation, controlling the output state of DCDC and the generator according to the battery voltage value, DCDC output voltage value, DCDC output power value, generator target output voltage value and generator output power value includes: judging the magnitude relationship between the battery voltage value and a first preset voltage value, a second preset voltage value and a third preset voltage value; controlling the output state of DCDC and the generator according to the magnitude relationship between the battery voltage value and the first preset voltage value, the second preset voltage value and the third preset voltage value, the DCDC output voltage value, the DCDC output power value, the generator target output voltage value and the generator output power value; wherein, the magnitudes of the first preset voltage value, the second preset voltage value and the third preset voltage value increase in sequence.

[0007] As an optional implementation, controlling the output state of the DCDC and the generator according to the battery voltage value, the DCDC output voltage value, the DCDC output power value, the generator target output voltage value and the generator output power value includes: if the battery voltage value is greater than the first preset voltage value and less than the second preset voltage value, controlling the output state of the DCDC and the generator according to the DCDC output voltage value and the generator target output voltage value.

[0008] As an optional implementation, if the battery voltage value is greater than the first preset voltage value and less than the second preset voltage value, controlling the output state of the DCDC and the generator according to the DCDC output voltage value and the generator target output voltage value includes: controlling the DCDC to output at the DCDC output voltage value and the generator to output at the generator target output voltage; the DCDC output voltage value is less than the generator target output voltage.

[0009] As an optional implementation, after the step of controlling the DCDC to output at the DCDC output voltage value and the generator to output at the target output voltage: determining whether the external voltage reaches the generator target output voltage after a preset time; if the external voltage does not reach the generator target output voltage after the preset time, the generator fails and only the DCDC is controlled to output at the DCDC output voltage value.

[0010] As an optional implementation, controlling the output state of DCDC and the generator according to the battery voltage value, DCDC output voltage value, DCDC output power value, generator target output voltage value and generator output power value also includes: if the battery voltage value is greater than the second preset voltage value and less than the third preset voltage value, controlling the output state of DCDC and the generator according to the DCDC output power value and the generator output power.

[0011] As an optional implementation, if the battery voltage value is greater than the second preset voltage value and less than the third preset voltage value, controlling the output state of DCDC and the generator according to the DCDC output power value and the generator output power includes: judging the magnitude relationship between the battery voltage value and a fourth preset voltage value, the fourth preset voltage value being greater than the second preset voltage value and less than the third preset voltage value; judging the magnitude relationship between the DCDC output power value and the generator output power; determining the charging method for the battery according to the magnitude relationship between the battery voltage value and the fourth preset voltage value, and the magnitude relationship between the DCDC output power value and the generator output power.

[0012] As an optional implementation, determining the charging method for the battery based on the magnitude relationship between the battery voltage value and a fourth preset voltage value, and the magnitude relationship between the DCDC output power value and the generator output power includes: if the battery voltage value is greater than the fourth preset voltage value, controlling the smaller of the DCDC output power value and the generator output power to output the power to the battery; if the battery voltage value is less than the fourth preset voltage value, controlling the larger of the DCDC output power value and the generator output power to output the power to the battery.

[0013] As an optional implementation, controlling the output status of the DCDC and the generator according to the battery voltage value, the DCDC output voltage value, the DCDC output power value, the generator target output voltage value and the generator output power value also includes: determining whether the battery voltage value is greater than a third preset voltage value; if the battery voltage value is greater than the third preset voltage value, controlling the DCDC and the generator to stop outputting power to the battery.

[0014] As an optional implementation, controlling the output status of DCDC and the generator according to the battery voltage value, DCDC output voltage value, DCDC output power value, generator target output voltage value and generator output power value also includes: determining whether the battery voltage value is less than a first preset voltage value; if the battery voltage value is less than the first preset voltage value, controlling the instrument panel to output a prompt signal indicating that the battery voltage value is too low.

[0015] In an embodiment of the present application, a coordinated control method for DCDC and a generator for a hybrid vehicle is provided, including: obtaining a battery voltage value; when the vehicle is in the ON gear, controlling the DCDC to output to the battery with the DCDC output voltage value; when the vehicle is in the START gear, the high-voltage system is normal and the engine is started: obtaining the DCDC output voltage value, the DCDC output power value, the generator target output voltage value and the generator output power value; and controlling the output state of the DCDC and the generator according to the battery voltage value, the DCDC output voltage value, the DCDC output power value, the generator target output voltage value and the generator output power value. The vehicle is equipped with a low-power high-voltage DCDC and an engine with a generator at the same time, and the DCDC and the generator are coordinated to work, so that the two cooperate, with the lowest cost and the highest utilization rate, and fully utilize the DCDC and the generator for efficient output, to provide sufficient low-voltage power supply for vehicle driving. By coordinating the work of the DCDC and the generator, the low-voltage power supply and fault warning of various working conditions of the vehicle can be met, while reducing the cost of the vehicle and improving the competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 It is a flow chart of a coordinated control method of a DCDC and a generator for a hybrid vehicle provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0020] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0021] like Figure 1 As shown, the embodiment of the present application provides a coordinated control method of a DCDC and a generator for a hybrid vehicle, comprising:

[0022] S1 obtains the battery voltage value;

[0023] When S2 is in the ON position on the vehicle, it controls DCDC to output the DCDC output voltage value to the battery;

[0024] S3 is in START gear on the vehicle, when the high-voltage system is normal and the engine is started: obtain the DCDC output voltage value, DCDC output power value, generator target output voltage value and generator output power value;

[0025] S4 controls the output states of the DCDC and the generator according to the battery voltage value, the DCDC output voltage value, the DCDC output power value, the generator target output voltage value, and the generator output power value.

[0026] Specifically, the vehicle is equipped with a low-power high-voltage DCDC and an engine-driven generator, and the DCDC and the generator are coordinated to work together, so that the two can work together to fully utilize the DCDC and the generator for efficient output at the lowest cost and the highest utilization rate, providing sufficient low-voltage power supply for vehicle driving. By coordinating the work of the DCDC and the generator, the low-voltage power supply and fault warning of various working conditions of the vehicle can be met, while reducing vehicle costs and improving product competitiveness.

[0027] As an optional implementation, controlling the output state of DCDC and the generator according to the battery voltage value, DCDC output voltage value, DCDC output power value, generator target output voltage value and generator output power value includes: judging the magnitude relationship between the battery voltage value and a first preset voltage value, a second preset voltage value and a third preset voltage value; controlling the output state of DCDC and the generator according to the magnitude relationship between the battery voltage value and the first preset voltage value, the second preset voltage value and the third preset voltage value, the DCDC output voltage value, the DCDC output power value, the generator target output voltage value and the generator output power value; wherein, the magnitudes of the first preset voltage value, the second preset voltage value and the third preset voltage value increase in sequence.

[0028] The specific settings of the first preset voltage value, the second preset voltage value and the third preset voltage value can be determined according to conditions such as the specific model of the hybrid vehicle, and this application does not limit this.

[0029] As an optional implementation, controlling the output state of the DCDC and the generator according to the battery voltage value, the DCDC output voltage value, the DCDC output power value, the generator target output voltage value and the generator output power value includes: if the battery voltage value is greater than the first preset voltage value and less than the second preset voltage value, controlling the output state of the DCDC and the generator according to the DCDC output voltage value and the generator target output voltage value.

[0030] As an optional implementation, if the battery voltage value is greater than the first preset voltage value and less than the second preset voltage value, controlling the output state of the DCDC and the generator according to the DCDC output voltage value and the generator target output voltage value includes: controlling the DCDC to output at the DCDC output voltage value and the generator to output at the generator target output voltage; the DCDC output voltage value is less than the generator target output voltage.

[0031] As an optional implementation, after the step of controlling the DCDC to output at the DCDC output voltage value and the generator to output at the target output voltage: determining whether the external voltage reaches the generator target output voltage after a preset time; if the external voltage does not reach the generator target output voltage after the preset time, the generator fails and only the DCDC is controlled to output at the DCDC output voltage value.

[0032] Specifically, when the high-voltage system is normal and the engine is started: when the drive motor and the engine are jointly driven, the HCU sends the drive system working mode to the hybrid mode; when the engine is driven alone, the HCU sends the drive system working mode to the engine mode. When the external voltage is higher than the DCDC output voltage, the DCDC will report a fault and stop working. When the external voltage is higher than the target value of the generator output voltage, the phase voltage cannot be established and cannot be output to the outside during the start-up and operation of the generator. Therefore, when the DCDC and the generator are working at the same time, the DCDC is required to collect the external voltage and adjust the actual output low voltage value in real time according to the external voltage value.

[0033] Detect the battery voltage. If the battery voltage value is greater than the first preset voltage value and less than the second preset voltage value (for example, for a 24V platform, the second preset voltage value is set to 20V), it is considered that the battery demand power is large, and the DCDC and generator work at the same time. After power-on, the DCDC is enabled and outputs at the DCDC voltage value; after the engine is started, the generator is excited and outputs at the target output voltage. If the external voltage is not increased to the target output voltage of the generator (that is, the generator does not output) within the set time after the engine is started, the generator fails, and only the DCDC continues to work and output at the output voltage. If the external voltage is increased to the target output voltage of the generator, it is output to the low-voltage system at the target output voltage of the generator. At this time, the DCDC and the generator work and output at the same time.

[0034] As an optional implementation, controlling the output state of DCDC and the generator according to the battery voltage value, DCDC output voltage value, DCDC output power value, generator target output voltage value and generator output power value also includes: if the battery voltage value is greater than the second preset voltage value and less than the third preset voltage value, controlling the output state of DCDC and the generator according to the DCDC output power value and the generator output power.

[0035] As an optional implementation, if the battery voltage value is greater than the second preset voltage value and less than the third preset voltage value, controlling the output state of DCDC and the generator according to the DCDC output power value and the generator output power includes: judging the magnitude relationship between the battery voltage value and a fourth preset voltage value, the fourth preset voltage value being greater than the second preset voltage value and less than the third preset voltage value; judging the magnitude relationship between the DCDC output power value and the generator output power; determining the charging method for the battery according to the magnitude relationship between the battery voltage value and the fourth preset voltage value, and the magnitude relationship between the DCDC output power value and the generator output power.

[0036] When the battery voltage value is greater than the second preset voltage value and less than the fourth preset voltage value (for example, for a 24V platform, the fourth preset voltage value can be set to 26V), the power demand is moderate, and the components with larger output power can be controlled to give priority to work output. When the DCDC output power is large, after power-on, DCDC is enabled and outputs at a voltage value. After the engine is started, the generator is not excited or stops excitation, and the generator does not work. When the generator output power is large, after the engine is started, the generator is excited and outputs at the target output voltage UB, and DCDC stops enabling and stops outputting.

[0037] As an optional implementation, determining the charging method for the battery based on the magnitude relationship between the battery voltage value and a fourth preset voltage value, and the magnitude relationship between the DCDC output power value and the generator output power includes: if the battery voltage value is greater than the fourth preset voltage value, controlling the smaller of the DCDC output power value and the generator output power to output the power to the battery; if the battery voltage value is less than the fourth preset voltage value, controlling the larger of the DCDC output power value and the generator output power to output the power to the battery.

[0038] When the battery voltage value is greater than the fourth preset voltage value and less than the third preset voltage value (for example, for a 24V platform, the third preset voltage value can be set to 30V), it is considered that the battery demand power is small, and the components with smaller output power are given priority to work output. When the DCDC output power is small, after power-on, DCDC is enabled and outputs at the DCDC voltage value. After the engine is started, the generator is not excited or stops excitation, and the generator does not work. When the generator output power is small, after the engine is started, the generator is excited and outputs at the target output voltage, and DCDC stops enabling and stops outputting.

[0039] As an optional implementation, controlling the output status of the DCDC and the generator according to the battery voltage value, the DCDC output voltage value, the DCDC output power value, the generator target output voltage value and the generator output power value also includes: determining whether the battery voltage value is greater than a third preset voltage value; if the battery voltage value is greater than the third preset voltage value, controlling the DCDC and the generator to stop outputting power to the battery.

[0040] As an optional implementation, controlling the output status of DCDC and the generator according to the battery voltage value, DCDC output voltage value, DCDC output power value, generator target output voltage value and generator output power value also includes: determining whether the battery voltage value is less than a first preset voltage value; if the battery voltage value is less than the first preset voltage value, controlling the instrument panel to output a prompt signal indicating that the battery voltage value is too low.

[0041] Specifically, for example, when the vehicle is powered on to the ON gear or the START gear, the battery voltage value needs to be detected. If the voltage value is less than the first preset voltage value (for example, for a 24V platform, the first preset voltage value is set to be equal to 19V), regardless of whether the DCDC and the generator are working, the instrument needs to light up the red charging indicator warning light to indicate that the battery voltage value is too low.

[0042] In addition, when the vehicle is in the ON gear: the engine does not start, so the generator does not work. DCDC is enabled and starts to work, outputting at the DCDC voltage value (for example, 24V platform, output at 27V) to power the vehicle's low-voltage system. The instrument determines whether to light up based on the battery voltage value and the working status of DCDC, and does not detect the working status of the generator. When DCDC is working, the no indication warning light is on, and when DCDC is not working, the red charging indication warning light is on.

[0043] When the vehicle is in START gear: After the vehicle is in START gear, HCU needs to send the drive system working mode. When DCDC and generator fail, fault status feedback is required, and the instrument and other instruments need to interpret and use it. Driven in pure electric mode, the engine does not start or the engine fails and cannot start: HCU sends the drive system working mode as pure electric mode. At this time, the engine does not start, so the generator has no output. Only DCDC is enabled and outputs the DCDC voltage value to power the low-voltage system of the vehicle. The instrument determines whether the light is on based on the battery voltage value, the drive system working mode, and the working status of DCDC, and does not detect the working status of the generator. When DCDC is working, no indicator light is on, and the red charging indicator alarm light is on when it does not work due to DCDC failure or other reasons.

[0044] When the high-voltage system fails and the engine is started, the HCU sends the drive system working mode to limp mode. At this time, the DCDC cannot work due to the high-voltage system failure. The vehicle is driven in engine mode. The generator is excited and output at the target output voltage (for example, 24V platform, set to 29V) to power the low-voltage system of the vehicle. The instrument determines whether to light up according to the battery voltage value, the drive system working mode, the vehicle fault status, the working status bit of the DCDC and the working status of the generator (D+ hard line potential). Because the working status bit of the DCDC is not working, the yellow charging indicator warning light is lit when the generator is working, and the red charging indicator warning light is lit when the generator is not working. When the generator output power is large, it can work normally and meet the low-voltage power demand of most driving conditions, and the DCDC failure cannot work, the instrument may not light up the yellow charging indicator warning light. Prevent the instrument fault lights from displaying too many and cluttering.

[0045] When the high-voltage system fails or the engine fails, the HCU sends the drive system working mode to the fault mode. At this time, the high-voltage system and the engine cannot work due to the fault, so the DCDC and the generator cannot output and cannot supply power to the low-voltage system of the vehicle. The instrument determines whether to light up based on the battery voltage value U, the drive system working mode, the vehicle fault status, the working status bit of the DCDC and the working status of the generator (D+ hard line potential). Because the DCDC and the generator are not working, the instrument lights up the red charging indicator warning light

[0046] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0047] If the integrated units in the above embodiments are implemented in the form of software functional units and sold or used as independent products, they can be stored in the above computer-readable storage medium. Based on this understanding, the technical solution of the present application, 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, which is stored in a storage medium and includes several instructions for enabling one or more electronic devices (such as personal computers, servers, or network devices) to perform all or part of the steps of the methods described in the various embodiments of the present application.

[0048] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0049] In the several embodiments provided in the present application, it should be understood that the disclosed client can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0050] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution provided in this embodiment.

[0051] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0052] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0053] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A coordinated control method for a DCDC and a generator for a hybrid vehicle, characterized in that: include: Get the battery voltage value; When the vehicle is in the ON gear, the DCDC is controlled to output the DCDC output voltage value to the battery; In the START position on the vehicle, when the high-pressure system is normal and the engine is started: Obtaining the DCDC output voltage value, the DCDC output power value, the generator target output voltage value, and the generator output power value; The output states of the DCDC and the generator are controlled according to the battery voltage value, the DCDC output voltage value, the DCDC output power value, the generator target output voltage value and the generator output power value.

2. The coordinated control method of DCDC and generator for hybrid vehicle according to claim 1, characterized in that: The controlling of the output state of the DCDC and the generator according to the battery voltage value, the DCDC output voltage value, the DCDC output power value, the generator target output voltage value and the generator output power value comprises: Determining the magnitude relationship between the battery voltage value and the first preset voltage value, the second preset voltage value, and the third preset voltage value; Control the output state of the DCDC and the generator according to the magnitude relationship between the battery voltage value and the first preset voltage value, the second preset voltage value and the third preset voltage value, the DCDC output voltage value, the DCDC output power value, the generator target output voltage value and the generator output power value; The first preset voltage value, the second preset voltage value and the third preset voltage value are increased in sequence.

3. The coordinated control method of DCDC and generator for hybrid vehicle according to claim 2, characterized in that: The controlling of the output state of the DCDC and the generator according to the battery voltage value, the DCDC output voltage value, the DCDC output power value, the generator target output voltage value and the generator output power value comprises: If the battery voltage value is greater than the first preset voltage value and less than the second preset voltage value, the output states of the DCDC and the generator are controlled according to the DCDC output voltage value and the generator target output voltage value.

4. The coordinated control method of DCDC and generator for hybrid vehicle according to claim 3, characterized in that: If the battery voltage value is greater than the first preset voltage value and less than the second preset voltage value, controlling the output state of the DCDC and the generator according to the DCDC output voltage value and the generator target output voltage value includes: Controlling the DCDC to output at the DCDC output voltage value and the generator to output at the generator target output voltage; The DCDC output voltage value is less than the generator target output voltage.

5. The coordinated control method of DCDC and generator for hybrid vehicle according to claim 4, characterized in that: After the step of controlling the DCDC to output at the DCDC output voltage value and the generator to output at the target output voltage: Determining whether the external voltage reaches the target output voltage of the generator after a preset time period; If the external voltage does not reach the generator target output voltage after a preset time, the generator fails and only the DCDC is controlled to output at the DCDC output voltage value.

6. The coordinated control method of DCDC and generator for hybrid vehicle according to claim 2, characterized in that: The controlling the output state of the DCDC and the generator according to the battery voltage value, the DCDC output voltage value, the DCDC output power value, the generator target output voltage value and the generator output power value also includes: If the battery voltage value is greater than the second preset voltage value and less than the third preset voltage value, the output states of the DCDC and the generator are controlled according to the DCDC output power value and the generator output power.

7. The coordinated control method of DCDC and generator for hybrid vehicle according to claim 6, characterized in that: If the battery voltage value is greater than the second preset voltage value and less than the third preset voltage value, controlling the output state of the DCDC and the generator according to the DCDC output power value and the generator output power includes: Determining the magnitude relationship between the battery voltage value and a fourth preset voltage value, the fourth preset voltage value being greater than the second preset voltage value and less than the third preset voltage value; Determine the magnitude relationship between the DCDC output power value and the generator output power; The charging method of the battery is determined according to the magnitude relationship between the battery voltage value and the fourth preset voltage value, and the magnitude relationship between the DCDC output power value and the generator output power.

8. The coordinated control method of DCDC and generator for hybrid vehicle according to claim 7, characterized in that: Determining a charging method for the battery according to a magnitude relationship between the battery voltage value and a fourth preset voltage value, and a magnitude relationship between the DCDC output power value and the generator output power includes: If the battery voltage value is greater than the fourth preset voltage value, control the smaller one of the DCDC output power value and the generator output power to output power to the battery; If the battery voltage value is less than the fourth preset voltage value, the larger one of the DCDC output power value and the generator output power is controlled to be output to the battery.

9. The coordinated control method of DCDC and generator for hybrid vehicle according to claim 2, characterized in that: The controlling the output state of the DCDC and the generator according to the battery voltage value, the DCDC output voltage value, the DCDC output power value, the generator target output voltage value and the generator output power value also includes: Determining whether the battery voltage value is greater than a third preset voltage value; If the battery voltage value is greater than a third preset voltage value, the DCDC and the generator are controlled to stop outputting power to the battery.

10. The coordinated control method of DCDC and generator for a hybrid vehicle as claimed in claim 2, wherein the controlling the output state of the DCDC and generator according to the battery voltage value, the DCDC output voltage value, the DCDC output power value, the generator target output voltage value and the generator output power value further comprises: Determining whether the battery voltage value is less than a first preset voltage value; If the battery voltage value is less than the first preset voltage value, the control instrument panel outputs a prompt signal indicating that the battery voltage value is too low.

Images