Engineering vehicle and engineering vehicle control method

Abstract

The invention relates to an engineering vehicle and an engineering vehicle control method, and the engineering vehicle comprises a chassis system (1) which is configured to drive the engineering vehicle to run; the power supply system (2) is used for receiving power from the outside and supplying power to the outside; an electrical storage system (3) configured to store or release electrical energy; the switching device (4) is connected with the electric power storage system (3), the power supply system (2) and the chassis system (1) and is configured to switch the connection state of the electric power storage system (3) and the chassis system (1) and the connection state of the electric power storage system (3) and the power supply system (2); the power storage system (3) comprises: a power storage device (31); and the control device (32) is in signal connection with the electrical storage device (31) and is configured to determine the output power of the electrical storage device (31) according to the electric quantity condition of the electrical storage device (31) and an external power demand.

Description

Technical Field

[0001] The present disclosure relates to the field of power supply vehicles, and in particular to an engineering vehicle and an engineering vehicle control method. Background Art

[0002] With the rapid development of the economy, the requirements for electric power supply in daily production and life are getting higher and higher. Traditional diesel generator emergency power supply vehicles are gradually unable to meet users' requirements for uninterrupted power supply.

[0003] An uninterruptible power supply vehicle is a power supply vehicle equipped with a UPS (Uninterruptible Power Supply) host and energy storage batteries. It uses energy storage batteries as backup energy to provide stable and uninterrupted power supply to user equipment when there is a power outage or other power grid failure.

[0004] Uninterruptible power supply vehicles are increasingly being used due to their pollution-free and low-noise operation. Power supply vehicles are mostly driven by internal combustion engine type II chassis, which are inefficient and prone to environmental pollution. As society pays more and more attention to environmental protection, power supply vehicles with new energy chassis as carriers will become a future development trend.

[0005] The energy storage battery capacity of the uninterruptible power supply vehicle and the electric chassis in the related technology is generally small and cannot meet the requirements of long-term operation. Summary of the invention

[0006] In view of this, the embodiments of the present disclosure provide an engineering vehicle and an engineering vehicle control method, which can provide a longer power supply time.

[0007] In one aspect of the present disclosure, there is provided an engineering vehicle, comprising:

[0008] A chassis system configured to drive an engineering vehicle;

[0009] A power supply system, used for receiving power from the outside and supplying power to the outside;

[0010] a power storage system configured to store or release electrical energy; and

[0011] a switching device connected to the power storage system, the power supply system and the chassis system, and configured to switch the connection state of the power storage system with the chassis system and the power supply system so that the power storage system is connected to the chassis system or the power supply system;

[0012] The power storage system includes:

[0013] power storage device; and

[0014] The control device is connected to the power storage device signal and is configured to determine the output power of the power storage device according to the power status of the power storage device and the external power demand.

[0015] In some embodiments, the power storage device includes a first battery pack and a second battery pack;

[0016] Wherein, the control device is configured as follows:

[0017] respectively obtaining available power of the first battery pack and the second battery pack;

[0018] The output power of the first battery group and the second battery group is distributed according to the external power demand and the available power of the first battery group and the second battery group.

[0019] In some embodiments, the control device is further configured to discharge the first battery pack and the second battery pack simultaneously.

[0020] In some embodiments, the relationship among the external power demand, the available power of the first battery pack, the available power of the second battery pack, and the output power of the first battery pack and the output power of the second battery pack satisfies:

[0021] P1=P*W1 / (W1+W2), P2=P*W2 / (W1+W2)

[0022] The available power of the first battery pack is a first power W1 (kWh), the available power of the second battery pack is a second power W2 (kWh), and the external power demand is P (kW).

[0023] In some embodiments, the power storage system further comprises:

[0024] A first voltage conversion device, connected to the output terminal of the first battery pack and the input terminal of the switching device respectively, and configured to adjust the output voltage of the first battery pack;

[0025] A second voltage conversion device is connected to the output terminal of the second battery pack and the input terminal of the switching device respectively, and is configured to adjust the output voltage of the second battery pack;

[0026] The control device is signal-connected to the first voltage conversion device and the second voltage conversion device, and is configured to make the output voltage of the first voltage conversion device consistent with the output voltage of the second voltage conversion device.

[0027] In some embodiments, the control device is configured to make the output voltage of the first voltage conversion device and the second voltage conversion device greater than the maximum output voltage of the first battery pack and the second battery pack and less than the maximum allowable input voltage of the power supply system.

[0028] In some embodiments, the engineering vehicle includes a power conservation mode, and the switching device is configured to connect the power storage system to the power supply system in the power conservation mode so that the power storage system supplies power to the outside through the power supply system.

[0029] In some embodiments, the engineering vehicle includes a driving mode, and the switching device is configured to connect the power storage system with the chassis system in the driving mode so that the power storage system supplies power to the chassis system through the power supply system.

[0030] In some embodiments, the engineering vehicle further comprises:

[0031] The soundproof box is installed in the chassis system;

[0032] Among them, the power storage system and the power supply system are arranged in the soundproof box.

[0033] In another aspect of the present disclosure, there is provided an engineering vehicle control method of an engineering vehicle based on any one of the above embodiments, comprising:

[0034] The output power of the power storage device is determined according to the power status of the power storage device and the external power demand.

[0035] In some embodiments, the power storage system includes a first battery pack and a second battery pack;

[0036] Wherein, according to the power status of the power storage device and the external power demand, determining the output power of the power storage device specifically includes:

[0037] respectively obtaining available power of the first battery pack and the second battery pack;

[0038] The output power of the first battery group and the second battery group is distributed according to the external power demand and the available power of the first battery group and the second battery group.

[0039] In some embodiments, the engineering vehicle control method further includes:

[0040] The first battery pack and the second battery pack are discharged to the outside at the same time.

[0041] Therefore, according to the embodiment of the present disclosure, by setting up a switching device, the working state of the engineering vehicle can be flexibly switched according to the mains power supply situation and the working requirements of the engineering vehicle, so as to supply power to the load, drive the vehicle to travel or charge and store energy. By setting up a control device to determine the output power of the power storage device according to the power situation of the power storage device and the external power demand, the reserved energy of the power storage device can be efficiently used while meeting the power requirements of the load end or the driving end, and the output power of the power storage device can be optimized, which helps to extend the power supply time of the power storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0043] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0044] Figure 1 is a schematic diagram of the structure of some embodiments of the engineering vehicle according to the present disclosure;

[0045] Figure 2 is a schematic diagram of the connection relationship of the switching device according to some embodiments of the engineering vehicle of the present disclosure;

[0046] Figure 3 is a schematic diagram of connection relationships of some embodiments of the engineering vehicle disclosed herein;

[0047] Figure 4 is a flow chart of some embodiments of the engineering vehicle control method according to the present disclosure.

[0048] In the figure:

[0049] 1. Chassis system; 11. Motor controller; 12. Drive motor; 13. Transmission system; 14. Wheel; 2. Power supply system; 21. Rectifier; 22. Inverter; 23. Main input circuit breaker; 24. Output circuit breaker; 25. Bypass input circuit breaker; 26. Static switch; 3. Power storage system; 31. Power storage device; 311. First battery pack; 312. Second battery pack; 32. Control device; 33. First voltage conversion device; 34. Second voltage conversion device; 4. Switching device; 41. Power supply mode switch; 42. Driving mode switch; 5. External power supply; 6. Load.

[0050] It should be understood that the size of each part shown in the accompanying drawings is not drawn according to the actual proportional relationship. In addition, the same or similar reference numerals represent the same or similar components. DETAILED DESCRIPTION

[0051] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0052] The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0053] In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other device without an intermediate device, or may not be directly connected to the other device but have an intermediate device.

[0054] All terms (including technical terms or scientific terms) used in the present disclosure have the same meanings as those understood by ordinary technicians in the field to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0055] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0056] With the rapid development of the economy, the requirements for electric power supply in daily production and life are getting higher and higher. Traditional diesel generator emergency power supply vehicles are gradually unable to meet users' requirements for uninterrupted power supply.

[0057] An uninterruptible power supply vehicle is a power supply vehicle equipped with a UPS (Uninterruptible Power Supply) host and energy storage batteries. It uses energy storage batteries as backup energy to provide stable and uninterrupted power supply to user equipment when there is a power outage or other power grid failure.

[0058] Uninterruptible power supply vehicles are increasingly being used due to their pollution-free and low-noise operation. Power supply vehicles are mostly driven by internal combustion engine type II chassis, which are inefficient and prone to environmental pollution. As society pays more and more attention to environmental protection, power supply vehicles with new energy chassis as carriers will become a future development trend.

[0059] The energy storage battery capacity of the uninterruptible power supply vehicle and the electric chassis in the related technology is generally small and cannot meet the requirements of long-term operation. How to make efficient and complementary use of the energy stored in the chassis battery and the energy stored in the UPS system battery to extend the power supply operation time has become a key issue in the research of pure electric UPS power supply vehicles.

[0060] In some related technologies, chassis driving and emergency power generation functions share a battery, which makes the battery large in size and heavy in weight, bringing difficulties to the development of mobile vehicles; the mileage needs to be limited to reserve sufficient power for power maintenance operations; after some batteries are discharged, there is a voltage difference between battery packs, which poses a safety hazard.

[0061] In other related technologies, the power battery on the vehicle chassis and the power battery in the vehicle cargo box are used in parallel. Due to the different voltage levels and battery capacities of the two battery groups, it is easy to form a circulation current, damage the battery system, and even cause safety hazards.

[0062] In view of this, in one aspect of an embodiment of the present disclosure, an engineering vehicle is provided that can provide a longer power supply time.

[0063] Figure 1 is a schematic diagram of the structure of some embodiments of the engineering vehicle disclosed herein, Figure 2 is a schematic diagram of the connection relationship of the switching device of some embodiments of the engineering vehicle disclosed in the present invention, with reference to Figure 1-2 The engineering vehicle includes a chassis system 1, a power supply system 2, a power storage system 3 and a switching device 4.

[0064] The chassis system 1 is configured to drive the engineering vehicle, and the power supply system 2 is used to receive power from the outside and to supply power to the outside. The power storage system 3 is configured to store or release electric energy. The switching device 4 is connected to the power storage system 3, the power supply system 2 and the chassis system 1, and is configured to switch the connection state of the power storage system 3 with the chassis system 1 and the power supply system 2, so that the power storage system 3 is connected to the chassis system 1 or the power supply system 2.

[0065] The power storage system 3 includes a power storage device 31 and a control device 32 . The control device 32 is signal-connected to the power storage device 31 and is configured to determine the output power of the power storage device 31 according to the power status of the power storage device 31 and external power demand.

[0066] The chassis system 1 includes a motor controller 11, a drive motor 12, a transmission system 13 and wheels 14 which are connected in sequence. The power storage system 3 is connected to the motor controller 11 through the switching device 4, and outputs the stored electric energy to the drive motor 12. The output end of the drive motor 12 is connected to the chassis transmission system, and finally transmits the power to the wheels 14 to drive the chassis of the vehicle to travel. The chassis system 1 includes but is not limited to the use of a new energy pure electric chassis, which has low noise and no pollution during operation and driving, and meets the requirements of green and low-carbon emissions.

[0067] The power supply system 2 includes but is not limited to a main input circuit breaker 23, a rectifier 21, an inverter 22, and an output circuit breaker 24 connected in sequence, and may also include a bypass input circuit breaker 25 and a static switch 26, a bypass input circuit breaker 25 and a static switch 26. The power supply system 2 is connected to an external power source 5 and a load 6 respectively, and the external power source 5 includes but is not limited to municipal power supply.

[0068] The engineering vehicle includes but is not limited to a power supply vehicle, which can be a pure electric power supply vehicle and can be connected to the mains. When the municipal power supply is normal, the power storage device 31 is connected to the power supply system 2 through the switching device 4. At this time, the mains power passes through the main input circuit breaker 23, rectifier 21, inverter 22, and output circuit breaker 24 of the power supply system 2 to supply power to the input end of the load 6 and charge the power storage device 31.

[0069] When the municipal power supply is cut off, the switching device 4 keeps the power storage device 31 connected with the power supply system 2, and the power storage device 31 automatically changes from charging to discharging, and provides electric energy to the load 6 through the inverter 22 of the power supply system 2. The control device 32 determines the output power of the power storage device 31 according to the power status of the power storage device 31 and the power requirement of the external load 6, and provides uninterrupted power supply to the load 6 to ensure normal electricity use for users.

[0070] When the city power returns to normal, the power storage device 31 automatically changes from discharging to charging. The city power supplies power to the load 6 through the power supply system 2 and charges the power storage device 31 through the control device 32 at the same time.

[0071] After completing the power conservation task, the connection between the engineering vehicle and the mains can be disconnected, and the chassis system 1 can be connected to the power storage system 3 through the switching device 4. At this time, the vehicle is in driving mode. The power storage system 3 provides uninterrupted power supply to the chassis system 1 according to the power demand of the chassis system 1 to drive the engineering vehicle.

[0072] The control device 32 includes, but is not limited to, a power distribution management system for the battery.

[0073] The switching device 4 includes but is not limited to a switching switch, including a power supply mode switch 41 and a driving mode switch 42. The switching switch can be in the form of a button or a lever, so that the circuit is opened and closed smoothly and stably, and different operation modes can be selected and switched.

[0074] The power supply mode switch 41 is connected to the power supply system 2, and the driving mode switch 42 is connected to the chassis system 1. When the power supply is maintained, the driving mode switch 42 is disconnected and the power supply mode switch 41 is closed, and the current is transferred between the power supply system 2 and the power storage system 3 through the power supply mode switch 41; when the vehicle is driving, the power supply mode switch 41 is disconnected and the driving mode switch 42 is closed, and the current is transferred between the chassis system 1 and the power storage system 3 through the driving mode switch 42.

[0075] In this embodiment, by setting up a switching device 4, the working state of the engineering vehicle can be flexibly switched according to the mains power supply situation and the working requirements of the engineering vehicle, so as to supply power to the load, drive the vehicle to travel or charge and store energy. By setting up a control device 32 to determine the output power of the power storage device 31 according to the power situation of the power storage device 31 and the external power demand, the reserved energy of the power storage device 31 can be efficiently used while meeting the power requirements of the load end or the driving end, and the output power of the power storage device 31 can be optimized, which helps to extend the power supply time of the power storage system.

[0076] refer to Figure 1 and Figure 2 In some embodiments, the power storage device 31 includes a first battery group 311 and a second battery group 312. The control device 32 is configured to: obtain the available power of the first battery group 311 and the second battery group 312 respectively; and allocate the output power of the first battery group 311 and the second battery group 312 according to the external power demand and the available power of the first battery group 311 and the second battery group 312.

[0077] The first battery pack 311 includes but is not limited to a vehicle-mounted battery pack, and the second battery pack 312 includes but is not limited to a chassis battery pack. The first battery pack 311 and the second battery pack 312 both include an energy storage battery module and a battery management system. The energy storage battery module stores and releases electrical energy, and the battery management system monitors the power, temperature and other states of the energy storage battery module in real time.

[0078] In this embodiment, the power storage device 31 includes multiple battery groups. By allocating the output power of the first battery group 311 and the second battery group 312 according to the external power demand and the available power of the first battery group 311 and the second battery group 312, the energy of the two battery groups can be superimposed, the power supply time of the power storage system 3 is extended, and it is helpful to improve the driving time of the engineering vehicle and the operating time of the load 6. The first battery group 311 and the second battery group 312 are used together, which increases the frequency of use of each battery group, helps to maintain the internal activity of the battery, and improves the service life.

[0079] In some embodiments, the control device 32 is further configured to cause the first battery pack 311 and the second battery pack 312 to discharge outward simultaneously.

[0080] When the power storage device 31 receives municipal power supply for charging, under the condition of constant input charging power, the control device 32 optimizes the allocation of charging power to each battery group with the shortest charging time as the goal, and the system fully charges the first battery group 311 and the second battery group 312 at the same time, and the shorter the time used, the better.

[0081] In this embodiment, the first battery group 311 and the second battery group 312 are discharged and charged simultaneously, so that the power supply time of the first battery group 311 and the second battery group 312 is consistent, so that the power supply time of the entire system is longer, and the reserve energy of the first battery group 311 and the second battery group 312 is efficiently used. The simultaneous discharge of the two battery groups can not only ensure the uninterrupted power supply operation of the system, but also ensure that the vehicle can meet the use of high-power loads, expand the application range of the vehicle, and improve the practicality of the engineering vehicle.

[0082] In some embodiments, the relationship between the external power demand, the available power of the first battery group 311, the available power of the second battery group 312, and the output power of the first battery group 311 and the output power of the second battery group 312 satisfies: P1 = P*W1 / (W1+W2), P2 = P*W2 / (W1+W2).

[0083] The available power of the first battery group 311 is a first power W1 (kWh), the available power of the second battery group 312 is a second power W2 (kWh), and the external power demand is P (kW).

[0084] The operation of power allocation includes the following:

[0085] The control device 32 obtains the total power demand information of the load end or the driving end, which is defined as P, in kW.

[0086] The control device 32 obtains the current available power information of the first battery pack 311 and the second battery pack 312, which are defined as W1 and W2, in kWh. The current available power refers to the power remaining for external use after removing the power that the battery pack must retain. The power that the battery pack must retain can be set manually, generally set to 5% to 10% of the total capacity of the battery pack. In particular, if a battery pack is insufficient, that is, there is no remaining power for external use after removing the power that it must retain, the control device 32 will cut off the circuit and only leave the other battery pack for power supply.

[0087] Assuming the output power allocated to the first battery group 311 is P1 and the output power allocated to the second battery group 312 is P2, the sustainable power supply time t1 = W1 / P1 of the first battery group 311 and the sustainable power supply time t2 = W2 / P2 of the second battery group 312 are obtained.

[0088] In order to achieve the longest power supply time while meeting the power demand of the external load, it should satisfy: P1+P2=P and t1=t2, that is, it meets the two-variable linear equation system:

[0089]

[0090] Solving the equation, the output power allocated to the first battery group 311 and the second battery group 312 is:

[0091]

[0092] According to the above calculated power distribution, the sustainable power supply time of the entire battery system is:

[0093]

[0094] The first battery group 311 and the second battery group 312 may include multiple groups of batteries respectively. When the first battery group 311 includes m groups of batteries and the second battery group 312 includes n groups of batteries, the longest power supply time is achieved while meeting the power requirements of the external load. The following conditions should be met:

[0095]

[0096] The output power allocated to each battery of the first battery group 311 and the second battery group 312 is:

[0097]

[0098] The sustainable power supply time of the entire battery system is:

[0099]

[0100] In this embodiment, the control device 32 shares the total load power and reasonably optimizes the power distribution strategy, thereby realizing the first battery pack 311 and the second battery pack 312, which can extend the uninterrupted power supply operation time and the uninterrupted driving time.

[0101] The first battery pack 311 includes but is not limited to an on-board battery pack, and the second battery pack 312 includes but is not limited to a chassis battery pack. The two battery packs are connected to each other so that energy is complementary to each other. Even if the chassis battery is low on power, the vehicle can still travel with the help of the on-board battery; when the on-board battery is low on power, the vehicle can still operate with power provided by the chassis battery.

[0102] Figure 3 is a schematic diagram of the connection relationship of some embodiments of the engineering vehicle disclosed in the present invention, with reference to Figure 1 to Figure 3In some embodiments, the power storage system 3 further includes a first voltage conversion device 33 and a second voltage conversion device 34 .

[0103] The first voltage conversion device 33 is connected to the output end of the first battery pack 311 and the input end of the switching device 4, respectively, and is configured to adjust the output voltage of the first battery pack 311. The second voltage conversion device 34 is connected to the output end of the second battery pack 312 and the input end of the switching device 4, respectively, and is configured to adjust the output voltage of the second battery pack 312.

[0104] The control device 32 is signal-connected to the first voltage conversion device 33 and the second voltage conversion device 34 , and is configured to make the output voltage of the first voltage conversion device 33 consistent with the output voltage of the second voltage conversion device 34 .

[0105] The first voltage conversion device 33 and the second voltage conversion device 34 include but are not limited to DC-DC voltage converters. The first voltage conversion device 33 and the second voltage conversion device 34 also have multiple protection functions, such as overvoltage protection, overcurrent protection and overtemperature protection, etc. These functions ensure that the system can automatically stop running under abnormal conditions to prevent equipment damage and safety accidents.

[0106] In this embodiment, by setting the first voltage conversion device 33 and the second voltage conversion device 34, the different voltages of the first battery group 311 and the second battery group 312 are respectively adjusted to the set consistent voltage, so as to achieve the consistency requirement of the charging and discharging voltages of the two groups of batteries. This can be widely applied to the configuration and layout of market standard electric chassis and UPS (Uninterruptible Power Supply) systems, which is beneficial to controlling product production and manufacturing costs and facilitating market industrialization.

[0107] refer to Figure 1 to Figure 3 In some embodiments, the control device 32 is configured to make the output voltage of the first voltage conversion device 33 and the second voltage conversion device 34 greater than the maximum output voltage of the first battery group 311 and the second battery group 312 and less than the maximum allowable input voltage of the power supply system 2.

[0108] The output voltage range of the chassis battery is 500-650V, the output voltage range of the onboard battery voltage is 484-552V, and the host of the power supply system 2 allows an input voltage range of 400-700V. In order to meet the working requirements of the host of the power supply system 2, the chassis battery and the onboard battery voltage need to be adjusted to the allowable range.

[0109] The chassis battery voltage can be adjusted from 600V to the preferred value of 680V, ​​and the on-board battery voltage can also be adjusted to 680V. The preferred value 680V is higher than the maximum value of the voltage range of the chassis battery and the on-board battery. Both the chassis battery and the on-board battery require a voltage boosting process, that is, the first voltage conversion device 33 and the second voltage conversion device 34 only need to complete the voltage boosting operation, with a simple structure, low cost and small size.

[0110] In this embodiment, the output voltages of the first voltage conversion device 33 and the second voltage conversion device 34 are determined according to the voltage range of the first battery pack 311 and the second battery pack 312 and the allowable input voltage range of the host of the power supply system 2. The first voltage conversion device 33 and the second voltage conversion device 34 only perform a boost operation, thereby allowing the selection of a voltage conversion device with a relatively simple structure, relatively low cost and small size, which is beneficial to controlling costs and facilitating the overall vehicle layout design.

[0111] refer to Figure 1 and Figure 2 In some embodiments, the engineering vehicle includes a power conservation mode, and the switching device 4 is configured to connect the power storage system 3 to the power supply system 2 in the power conservation mode so that the power storage system 3 supplies power to the outside through the power supply system 2.

[0112] When the municipal power supply is cut off, the switching device 4 is configured to connect the power storage system 3 with the power supply system 2. The switching device 4 maintains the connection between the power storage device 31 and the power supply system 2. The power storage device 31 automatically changes from charging to discharging, and provides electrical energy to the load 6 through the inverter 22 of the power supply system 2. The control device 32 determines the output power of the power storage device 31 according to the power status of the power storage device 31 and the power demand of the external load 6, and provides uninterrupted power supply to the load 6 to ensure normal electricity use for users.

[0113] In this embodiment, in the power conservation mode, the battery packs of the power storage device 31 share the total load power and reasonably optimize the power distribution, thereby achieving energy superposition of the battery packs of the power storage device 31 and extending the operating time of uninterrupted power supply.

[0114] refer to Figure 1 and Figure 2 In some embodiments, the engineering vehicle includes a driving mode, and the switching device 4 is configured to connect the power storage system 3 to the chassis system 1 in the driving mode so that the power storage system 3 supplies power to the chassis system 1 through the power supply system 2.

[0115] After completing the power conservation task, the engineering vehicle can be disconnected from the mains, and the chassis system 1 can be connected to the power storage system 3 through the switching device 4. The power storage system 3 provides uninterrupted power supply to the chassis system 1 according to the power demand of the chassis system 1 to drive the engineering vehicle.

[0116] In this embodiment, in the driving mode, the battery packs of the power storage device 31 share the total load power and reasonably optimize the power distribution, thereby achieving energy superposition of the battery packs of the power storage device 31, which can extend the uninterrupted driving time and increase the uninterrupted driving mileage of the vehicle.

[0117] In some embodiments, the engineering vehicle further includes a soundproof box, which is disposed in the chassis system 1. The power storage system 3 and the power supply system 2 are disposed in the soundproof box.

[0118] In this embodiment, the power storage system 3 and the power supply system 2 are arranged in a soundproof box, so that the power supply operation and driving process are low in noise and pollution-free.

[0119] Figure 4 is a flowchart of some embodiments of the engineering vehicle control method disclosed in the present invention, with reference to Figure 1 to Figure 4 In another aspect of the embodiments of the present disclosure, a method for controlling an engineering vehicle based on an engineering vehicle in any of the above embodiments is provided, including: step S1.

[0120] In step S1 , the output power of the power storage device 31 is determined according to the power status of the power storage device 31 and the external power demand.

[0121] The output power regulation of the power storage device 31 can be achieved through the BMS (battery management system) configured for the battery. The BMS mainly adjusts parameters such as voltage, current, and remaining power, and improves the safety, reliability, and life of the battery pack by monitoring, controlling, and managing the battery pack.

[0122] Operations to adjust output power may include:

[0123] 1. Obtain the battery status parameters (such as voltage, current, temperature, etc.) and operating parameters (such as load demand, charge / discharge status, etc.).

[0124] 2. Calculate the maximum continuous power allowed by the battery. The maximum continuous power allowed by the battery is the maximum power that the battery can output safely and continuously.

[0125] 3. Further calculate the remaining energy of the battery energy pool.

[0126] 4. Based on the evaluation results of the remaining energy, the BMS dynamically adjusts the current output power of the battery.

[0127] In this embodiment, the output power of the power storage device 31 is determined according to the power status of the power storage device 31 and the external power demand. The output power of the power storage device 31 can be optimized while meeting the power demand of the load end or the driving end, which helps to extend the power supply time of the power storage system.

[0128] refer to Figure 1 to Figure 4In some embodiments, the power storage system 3 includes a first battery pack 311 and a second battery pack 312. According to the power status of the power storage device 31 and the external power demand, the operation of determining the output power of the power storage device 31 specifically includes:

[0129] Respectively obtain the available power of the first battery pack 311 and the second battery pack 312;

[0130] The output power of the first battery group 311 and the second battery group 312 are distributed according to the external power demand and the available power of the first battery group 311 and the second battery group 312 .

[0131] In this embodiment, by allocating the output power of the first battery group 311 and the second battery group 312 according to the external power demand and the available power of the first battery group 311 and the second battery group 312, the energy of the two battery groups can be superimposed, the power supply time of the power storage system 3 is extended, and it is helpful to improve the driving time of the engineering vehicle and the operation time of the load 6. The first battery group 311 and the second battery group 312 are used together, which increases the frequency of use of each battery group, helps to maintain the internal activity of the battery, and improves the service life.

[0132] refer to Figure 1 to Figure 4 In some embodiments, the engineering vehicle control method further includes: step S2.

[0133] In step S2 , the first battery pack 311 and the second battery pack 312 are discharged to the outside at the same time.

[0134] In this embodiment, the first battery group 311 and the second battery group 312 are discharged and charged simultaneously to keep the power supply time of the first battery group 311 and the second battery group 312 consistent, thereby extending the power supply time of the entire system and efficiently utilizing the reserve energy of the first battery group 311 and the second battery group 312.

[0135] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0136] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. An engineering vehicle, characterized in that: include: A chassis system (1) is configured to drive the engineering vehicle; A power supply system (2), used for receiving power from the outside and supplying power to the outside; A power storage system (3) configured to store or release electrical energy; and a switching device (4) connected to the power storage system (3), the power supply system (2) and the chassis system (1), and configured to switch the connection state of the power storage system (3) with the chassis system (1) and the power supply system (2) so that the power storage system (3) is connected to the chassis system (1) or the power supply system (2); Wherein, the power storage system (3) comprises: an electrical storage device (31); and The control device (32) is signal-connected to the power storage device (31) and is configured to determine the output power of the power storage device (31) according to the power status of the power storage device (31) and external power demand.

2. The engineering vehicle according to claim 1, characterized in that: The power storage device (31) comprises a first battery group (311) and a second battery group (312); Wherein, the control device (32) is configured as follows: respectively obtaining available power of the first battery group (311) and the second battery group (312); The output power of the first battery group (311) and the second battery group (312) is distributed according to external power demand and available power of the first battery group (311) and the second battery group (312).

3. The engineering vehicle according to claim 2, characterized in that: The control device (32) is further configured to cause the first battery pack (311) and the second battery pack (312) to discharge outward simultaneously.

4. The engineering vehicle according to claim 3, characterized in that: The relationship between the external power demand, the available power of the first battery group (311), the available power of the second battery group (312), and the output power of the first battery group (311) and the output power of the second battery group (312) satisfies: P1=P*W1 / (W1+W2), P2=P*W2 / (W1+W2) The available power of the first battery group (311) is a first power W1 (kWh), the available power of the second battery group (312) is a second power W2 (kWh), and the external power demand is P (kW).

5. The engineering vehicle according to claim 2, characterized in that: The power storage system (3) further includes: A first voltage conversion device (33) is connected to the output end of the first battery group (311) and the input end of the switching device (4) respectively, and is configured to adjust the output voltage of the first battery group (311); A second voltage conversion device (34) is connected to the output end of the second battery group (312) and the input end of the switching device (4) respectively, and is configured to adjust the output voltage of the second battery group (312); The control device (32) is signal-connected to the first voltage conversion device (33) and the second voltage conversion device (34), and is configured to make the output voltage of the first voltage conversion device (33) consistent with the output voltage of the second voltage conversion device (34).

6. The engineering vehicle according to claim 5, characterized in that: The control device (32) is configured to make the output voltage of the first voltage conversion device (33) and the second voltage conversion device (34) greater than the maximum output voltage of the first battery group (311) and the second battery group (312) and less than the maximum allowable input voltage of the power supply system (2).

7. The engineering vehicle according to claim 2, characterized in that: The engineering vehicle includes a power conservation mode, and the switching device (4) is configured to connect the power storage system (3) with the power supply system (2) in the power conservation mode so that the power storage system (3) supplies power to the outside through the power supply system (2).

8. The engineering vehicle according to claim 2, characterized in that: The engineering vehicle includes a driving mode, and the switching device (4) is configured to connect the power storage system (3) with the chassis system (1) in the driving mode so that the power storage system (3) supplies power to the chassis system (1) through the power supply system (2).

9. The engineering vehicle according to claim 1, characterized in that: Also includes: A soundproof box, arranged on the chassis system (1); Wherein, the power storage system (3) and the power supply system (2) are arranged in the soundproof box.

10. An engineering vehicle control method based on the engineering vehicle according to any one of claims 1 to 9, characterized in that: include: The output power of the power storage device (31) is determined according to the power status of the power storage device (31) and the external power demand.

11. The engineering vehicle control method according to claim 10, characterized in that: The power storage system (3) comprises a first battery pack (311) and a second battery pack (312); Wherein, determining the output power of the power storage device (31) according to the power status of the power storage device (31) and the external power demand specifically includes: respectively obtaining available power of the first battery group (311) and the second battery group (312); The output power of the first battery group (311) and the second battery group (312) is distributed according to external power demand and available power of the first battery group (311) and the second battery group (312).

12. The engineering vehicle control method according to claim 11, characterized in that: Also includes: The first battery group (311) and the second battery group (312) are discharged to the outside at the same time.

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