Braking system and method of new energy mine truck and vehicle

Abstract

The invention provides a braking system and method for a new energy mine card and a vehicle. An ECU is connected with a battery and a power distribution unit PDU through a bus. The battery is connected with the PDU; a first braking power reduction module is arranged between the battery and the PDU; the ECU is used for controlling the first braking power reduction module to start when determining that the current electric quantity is greater than the preset electric quantity and determining that the vehicle is in a first braking state based on the operation condition, so that the current distributed by the PDU flows through the first braking power reduction module; and the first braking power reduction module consumes electric energy corresponding to the current. When the ECU determines that the current electric quantity is larger than the preset electric quantity and determines that the vehicle is in the first braking state based on the operation working condition, the first braking power reduction module arranged in front of the battery is used for conducting energy conversion on the current so as to improve consumption of braking power, and therefore the vehicle can meet the braking power requirement, and the braking efficiency of the vehicle is improved. And the running safety of the mine truck is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of brake control, and in particular to a brake system, method and vehicle for a new energy mining truck. Background Art

[0002] Mining trucks that use clean energy (such as electric, natural gas, hydrogen fuel, etc.) as power, that is, hybrid or pure electric new energy mining trucks, have two braking modes, one is braking by the service braking system, and the other is braking by the auxiliary braking system.

[0003] Among them, the service brake system is the main brake, that is, the brake system, and the auxiliary brake system is mainly motor braking (reverse drag / reverse drag); however, when the battery power reaches 100%, the motor braking of the auxiliary brake system will fail. Due to the large slope of the mining area and the high load of the mining truck, only using the service brake system and the auxiliary brake system to reversely drag the motor for braking cannot meet the braking power requirements, thus affecting the driving safety of the mining truck. Summary of the invention

[0004] In view of this, the embodiments of the present invention provide a braking system, method and vehicle for a new energy mining truck to solve the problem that the braking power requirement cannot be met in the prior art, thereby affecting the driving safety of the mining truck.

[0005] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0006] The first aspect of the embodiment of the present invention shows a braking system of a new energy mining truck, the system comprising:

[0007] The electronic control unit ECU is connected to the battery and the power distribution unit PDU through a bus;

[0008] The battery is connected to the power distribution unit PDU;

[0009] A first braking power reduction module is provided between the battery and a power distribution unit PDU;

[0010] The electronic control unit ECU is used to obtain the current power of the battery and the operating condition in real time; when it is determined that the current power is greater than the preset power and the vehicle is determined to be in the first braking state based on the operating condition, the first braking power reduction module is controlled to start, so that the current distributed by the power distribution unit PDU flows through the first braking power reduction module;

[0011] The first braking power reduction module consumes the electric energy corresponding to the current.

[0012] Optionally, the first braking power reduction module includes:

[0013] The first brake power reduction module includes a first electric energy conversion component and a first switch;

[0014] One end of the first power conversion component is connected to an output end of the power distribution unit PDU, and the other end of the first power conversion component is connected to the first switch;

[0015] The first switch is connected to another output end of the power distribution unit PDU;

[0016] The electronic control unit ECU is specifically configured to control the first switch to close when it is determined based on the operating condition that the vehicle is in the first braking state, so that the current distributed by the power distribution unit PDU passes through the first power conversion component;

[0017] The first electric energy conversion component consumes the electric energy corresponding to the current.

[0018] Optionally, the first braking power reduction module further includes a first relay;

[0019] One end of the first relay is connected to the connection point between the first switch and the power distribution unit PDU, and the other end of the first relay is connected to the bus;

[0020] The first relay is used to process other energy converted from the electric energy consumed by the first electric energy conversion component through a bus.

[0021] Optionally, it also includes: a second braking power reduction module;

[0022] The second brake power reduction module is disposed between the first brake power reduction module and the battery;

[0023] The electronic control unit ECU is further configured to, when it is determined that the current power is greater than a preset power and the vehicle is determined to be in a first braking state based on the operating condition, determine whether the driving speed of the vehicle is greater than a first threshold, and if so, control the first braking power reduction module and the second braking power reduction module to start, so that the current distributed by the power distribution unit PDU flows through the first braking power reduction module and the second braking power reduction module;

[0024] The first braking power reduction module and the second braking power reduction module consume the electric energy corresponding to the current.

[0025] Optionally, the ECU is further used for:

[0026] When it is determined that the environmental condition is in a low-temperature operating state, the second brake power reduction module is controlled to start, so that the second brake power reduction module obtains the corresponding current and converts it into heat energy.

[0027] Optionally, the second braking power reduction module includes:

[0028] The second brake power reduction module includes a second electric energy conversion component and a second switch;

[0029] One end of the second power conversion component is connected to an output end of the power distribution unit PDU, and the other end of the second power conversion component is connected to the second switch;

[0030] The second switch is connected to another output terminal of the power distribution unit PDU and a bus;

[0031] The electronic control unit ECU is specifically configured to, when it is determined that the current power is greater than a preset power and the vehicle is determined to be in a first braking state based on the operating condition, determine whether the driving speed of the vehicle is greater than a first threshold, and if so, control the first switch and the second switch to be closed, so that the current distributed by the power distribution unit PDU passes through the first power conversion component and the second power conversion component;

[0032] The first power conversion component and the second power conversion component jointly consume the electric energy corresponding to the current.

[0033] Optionally, the second braking power reduction module further includes a second relay;

[0034] One end of the second relay is connected to the connection point between the second switch and the power distribution unit PDU, and the other end of the second relay is connected to the bus;

[0035] The second relay is used to process other energy converted from the electric energy consumed by the second electric energy conversion component through a bus.

[0036] The second aspect of the embodiment of the present invention shows a braking method for a new energy mining truck, which is applicable to the braking system of the new energy mining truck shown in the first aspect of the embodiment of the present invention. The method includes:

[0037] The electronic control unit ECU obtains the current power level and operating condition of the battery in real time;

[0038] When the electronic control unit ECU determines that the current power is greater than the preset power and determines that the vehicle is in the first braking state based on the operating condition, the electronic control unit ECU controls the first braking power reduction module to start, so that the current distributed by the power distribution unit PDU flows through the first braking power reduction module;

[0039] The first braking power reduction module consumes the electric energy corresponding to the current.

[0040] Optionally, the braking system of the new energy mining truck further includes a second braking power reduction module; the method further includes:

[0041] When the electronic control unit ECU determines that the current power is greater than the preset power and determines that the vehicle is in the first braking state based on the operating condition, it determines whether the driving speed of the vehicle is greater than a first threshold value, and if so, controls the first braking power reduction module and the second braking power reduction module to start, so that the current distributed by the power distribution unit PDU flows through the first braking power reduction module and the second braking power reduction module;

[0042] The first braking power reduction module and the second braking power reduction module consume the electric energy corresponding to the current.

[0043] A third aspect of an embodiment of the present invention shows a vehicle, comprising a braking system conflicting with the first aspect of an embodiment of the present invention, wherein the braking system is used to execute the braking method shown in the first aspect of an embodiment of the present invention.

[0044] Based on the above-mentioned embodiment of the present invention, a braking system, method and vehicle of a new energy mining truck are provided, the system includes: an electronic control unit ECU is connected to a battery and a power distribution unit PDU through a bus; the battery is connected to the power distribution unit PDU; a first braking power reduction module is set between the battery and the power distribution unit PDU; the electronic control unit ECU is used to obtain the current power of the battery and the operating condition in real time; when it is determined that the current power is greater than the preset power, and the vehicle is determined to be in the first braking state based on the operating condition, the first braking power reduction module is controlled to start, so that the current distributed by the power distribution unit PDU flows through the first braking power reduction module; the first braking power reduction module consumes the electric energy corresponding to the current. In the embodiment of the present invention, when the ECU determines that the current power is greater than the preset power, and the vehicle is determined to be in the first braking state based on the operating condition, the first braking power reduction module set in front of the battery is used to convert the current into energy to increase the consumption of braking power, so that the vehicle meets the braking power demand, which greatly improves the driving safety of the mining truck. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] 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, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0046] Figure 1This is a schematic diagram of the architecture of a braking system of a new energy mining truck shown in an embodiment of the present invention;

[0047] Figure 2 This is a schematic diagram of the architecture of another braking system of a new energy mining truck according to an embodiment of the present invention;

[0048] Figure 3 This is a schematic diagram of the architecture of another braking system of a new energy mining truck according to an embodiment of the present invention;

[0049] Figure 4 This is a schematic diagram of the architecture of a braking system of another new energy mining truck according to an embodiment of the present invention;

[0050] Figure 5 A schematic diagram of the architecture of a vehicle according to an embodiment of the present invention;

[0051] Figure 6 The present invention is a schematic flow chart of a braking method for a new energy mining truck according to an embodiment of the present invention. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] The terms "first", "second", "third", "fourth", etc. (if any) 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 described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0054] It should be noted that the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0055] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0056] As known from the background technology, in order to improve the safety performance of the whole vehicle, some products add an eddy current retarder on the output shaft of the gearbox for auxiliary braking. The dead weight of the eddy current retarder reaches 200~500kg, and the heat generated for a long time working is relatively large, and the temperature can reach 300~700℃. The braking effect shows a thermal attenuation of 30~50%, and a certain layout space is required on the whole vehicle, which is expensive.

[0057] Since the eddy current retarder has a large weight, it requires a certain amount of space for its layout, generates a lot of heat when working for a long time, and the risk of failure is also increased due to the addition of rotating parts.

[0058] The purpose of the present invention is to utilize existing components on the transmission system of a new energy mining truck to increase braking modes and improve safety.

[0059] See also Figure 1 , is a schematic diagram of the architecture of a braking system of a new energy mining truck shown in an embodiment of the present invention, wherein the system includes an electronic control unit ECU10, a bus 20, a battery 30, a power distribution unit PDU40 and a first braking power reduction module 50;

[0060] The electronic control unit ECU10 is connected to the battery 30 and the power distribution unit PDU40 via the bus 20;

[0061] The battery 30 is connected to the power distribution unit PDU40;

[0062] A first braking power reduction module 50 is provided between the battery 30 and the power distribution unit PDU 40;

[0063] Optionally, if the vehicle is a hybrid vehicle, Figure 1 An engine, a microcontroller unit MCU and an ISG motor are also shown. An AC-DC module (not shown in the figure) is arranged between the battery 30 and the power distribution unit PDU40. When the engine generates AC power, the MCU controls the ISG motor to send the AC power to the power distribution unit PDU40, so that the power distribution unit PDU40 sends the AC power to the AC-DC module, so that the AC-DC module converts the AC power into DC power to charge the battery.

[0064] Optionally, a first braking power reduction module 50 is provided between the AC-DC module and the battery 30 .

[0065] The electronic control unit ECU10 is used to obtain the current power of the battery 30 and the operating condition in real time; when it is determined that the current power is greater than the preset power and the vehicle is determined to be in the first braking state based on the operating condition, the first braking power reduction module 50 is controlled to start, so that the current distributed by the power distribution unit PDU40 flows through the first braking power reduction module;

[0066] Optionally, when the electronic control unit ECU10 determines that the current power is greater than the preset power and determines that the vehicle is in the first braking state based on the operating condition, it controls the first braking power reduction module 50 to start and controls the first braking power reduction module 50 to consume the power of the battery 30.

[0067] It should be noted that the first braking power reduction module 50 can not only consume the current distributed by the power distribution unit PDU40 , but also consume the electric energy of the battery 30 .

[0068] In a specific implementation, the ECU 10 detects the change of the power in the battery 30 in real time to obtain the current power; then, determines whether the vehicle is in a running state, and if the vehicle is in a running state, obtains the current running condition of the vehicle;

[0069] The operating conditions of the vehicle include the operating speed of the vehicle and whether the road section where the vehicle is located is a road section with a large slope;

[0070] Next, the ECU 10 determines whether the running speed of the vehicle is greater than a preset speed, and when the road section where the vehicle is located is a road section with a large slope, the user is braking at this time, or the vehicle enters a braking mode, and determines that the vehicle is in a first braking state, that is, an emergency braking state, and controls the first braking power reduction module 50 to start, so that the current distributed by the power distribution unit PDU 40 flows through the first braking power reduction module 50;

[0071] The first braking power reduction module 50 consumes the electric energy corresponding to the current.

[0072] Optionally, based on the above invention Figure 1 The braking system of the new energy mining truck shown in FIG. 1 also shows the specific architecture of the first braking power reduction module 50, such as Figure 2 As shown, the first braking power reduction module 50 includes a first electric energy conversion component 51 and a first switch 52;

[0073] One end of the first power conversion component 51 is connected to an output end of the power distribution unit PDU40, and the other end of the first power conversion component 51 is connected to the first switch 52;

[0074] The first switch 52 is connected to another output terminal of the power distribution unit PDU40;

[0075] One end of the first power conversion component 51 is connected between the power distribution unit PDU40 and the battery 30 , and one end of the first switch 52 is also connected between the power distribution unit PDU40 and the battery 30 .

[0076] The electronic control unit ECU10 is specifically configured to control the first switch 52 to close when it is determined based on the operating condition that the vehicle is in the first braking state, so that the current distributed by the power distribution unit PDU40 passes through the first power conversion component 51;

[0077] The first electric energy conversion component 51 consumes the electric energy corresponding to the current.

[0078] Optionally, the first electric energy conversion component 51 is used to convert electric energy into other energy, such as thermal energy.

[0079] In a specific implementation, when the electronic control unit ECU10 determines that the vehicle is in the first braking state, it controls the first switch 52 to close, and at this time the first power conversion component 51 is connected, so that the current distributed by the power distribution unit PDU40 passes through the first power conversion component 51;

[0080] The first electric energy conversion component 51 converts the electric energy corresponding to the current into other energy to consume the corresponding electric energy.

[0081] Optionally, when the power of the battery 30 is less than a preset power, the electronic control unit ECU10 controls the first switch 52 to be disconnected, so that its current is quickly switched to the original circuit to charge the battery with the electric energy generated by the reverse drag of the motor.

[0082] Continue to see Figure 2 , the first braking power reduction module 50 also includes a first relay 53;

[0083] One end of the first relay 53 is connected to the connection point between the first switch 52 and the power distribution unit PDU40, and the other end of the first relay 53 is connected to the bus 20;

[0084] The first relay 53 is used to process other energy converted from the electric energy consumed by the first electric energy conversion component 51 through the bus 20.

[0085] Specifically, the first relay 53 sends other energy converted from the electric energy consumed by the first electric energy conversion component 51 to other devices through the bus 20 for use.

[0086] Optionally, the first electric energy conversion component 51 may be a resistance wire.

[0087] Specifically, if the first power conversion component 51 is a resistance wire, the first power conversion component 51 converts the electric energy corresponding to the current into thermal energy, and the first relay 53 sends the thermal energy to other devices through the bus 20.

[0088] In the embodiment of the present invention, since the first braking power reduction module is arranged near the battery and can directly dissipate a large amount of heat to the outside, when the ECU determines that the current power is greater than the preset power and determines that the vehicle is in the first braking state based on the operating condition, the ECU uses the first braking power reduction module arranged in front of the battery to convert the current into energy, and can also directly consume the electrical energy in the battery to increase the consumption of braking power, so that the vehicle meets the braking power requirements, greatly improving the driving safety of the mining truck.

[0089] Optionally, based on the braking system of the new energy mining truck shown in the above embodiment of the present invention, correspondingly, combined with Figure 1 , see Figure 3 , another braking system of a new energy mining truck is shown in the embodiment of the present invention, and the system includes:

[0090] An electronic control unit ECU10, a bus 20, a battery 30, a power distribution unit PDU40, a first braking power reduction module 50 and a second braking power reduction module 60;

[0091] The electronic control unit ECU10 is connected to the battery 30 and the power distribution unit PDU40 via the bus 20;

[0092] The battery 30 is connected to the power distribution unit PDU40;

[0093] A first braking power reduction module 50 and a second braking power reduction module 60 are provided between the battery 30 and the power distribution unit PDU 40;

[0094] The first braking power reduction module 50 is disposed in front of the second braking power reduction module 60 , that is, the first braking power reduction module 50 is closer to the battery 30 , and the second braking power reduction module 60 is closer to the PDU 40 .

[0095] Optionally, if the vehicle is a hybrid vehicle, Figure 1 An engine is also shown, and an AC-DC module (not shown in the figure) is arranged between the battery 30 and the power distribution unit PDU40; when the engine generates AC power, the AC power is sent to the power distribution unit PDU40, so that the power distribution unit PDU40 sends the AC power to the AC-DC module, so that the AC-DC module converts it into DC power to charge the battery.

[0096] Optionally, a first braking power reduction module 50 and a second braking power reduction module 60 are provided between the AC-DC module and the battery 30 .

[0097] The electronic control unit ECU10 is further used to determine whether the vehicle's driving speed is greater than a first threshold when it is determined that the current power is greater than a preset power and the vehicle is determined to be in a first braking state based on the operating condition, and if so, control the first braking power reduction module and the second braking power reduction module to start, so that the current distributed by the power distribution unit PDU40 flows through the first braking power reduction module 50 and the second braking power reduction module 60;

[0098] The first braking power reduction module 50 and the second braking power reduction module 60 consume the electric energy corresponding to the current.

[0099] It should be noted that the first threshold is set based on multiple experiments, and the speed corresponding to the first threshold is greater than the preset speed.

[0100] Specifically, the ECU 10 detects the change of the power in the battery 30 in real time to obtain the current power; then, determines whether the vehicle is in a running state, and if the vehicle is in a running state, obtains the current running condition of the vehicle;

[0101] The operating conditions of the vehicle include the operating speed of the vehicle and whether the road section where the vehicle is located is a road section with a large slope;

[0102] Next, the ECU 10 determines whether the running speed of the vehicle is greater than a preset speed, and when the vehicle is located on a road section with a large slope, it determines that the vehicle is in a first braking state, that is, an emergency braking state, and continues to determine whether the driving speed of the vehicle is greater than a first threshold. If so, it means that only turning on the first braking power reduction module 50 cannot eliminate a large amount of current; based on this, the first braking power reduction module 50 and the second braking power reduction module 60 are controlled to be turned on; the current distributed by the power distribution unit PDU40 flows through the first braking power reduction module 50 and the second braking power reduction module 60; the first braking power reduction module 50 and the second braking power reduction module 60 consume the electrical energy corresponding to the current.

[0103] Optionally, the ECU 10 is further used for:

[0104] When it is determined that the environmental condition is in a low-temperature operating state, the second braking power reduction module 60 is controlled to start, so that the second braking power reduction module 60 obtains the corresponding current and converts it into heat energy.

[0105] In a specific implementation, the ECU 10 detects the temperature in the environmental condition in real time. If the temperature is lower than a preset temperature, it is determined that the environmental condition is in a low-temperature operation state, that is, when driving in a low-temperature environment in winter or in a high-altitude or cold climate, the second brake power reduction module 60 is controlled to be turned on to convert the electric energy corresponding to the current distributed by the power distribution unit PDU 40 into heat energy, so as to send it to other devices through the bus 20 and heat other devices;

[0106] For example, the signal is sent to the engine oil tank, urea tank, and / or coolant via the bus 20 so as to heat the engine oil tank, urea tank, and coolant.

[0107] Optionally, the second brake power reduction module 60 may also be provided in the cab to serve as an auxiliary heating source to enhance the comfort of the driver.

[0108] The second brake power reduction module of the embodiment of the present invention is arranged near the PDU, so that when it is determined that the environmental condition is in a low-temperature operating state, the second brake power reduction module 60 is controlled to be turned on to convert electrical energy into thermal energy to heat other equipment; thereby improving the reliability, economy and power of the entire vehicle.

[0109] Optionally, the power consumption capacity of the first braking power reduction module 50 is greater than the power consumption capacity of the second braking power reduction module 60. The first braking power reduction module 50 can directly convert AC power and / or DC power, while the second braking power reduction module 60 can only convert DC power.

[0110] Optionally, based on the above invention Figure 3 The braking system of the new energy mining truck shown in FIG. 1 also shows the specific architecture of the second braking power reduction module 60, such as Figure 4 As shown, the second braking power reduction module 60 includes a second electric energy conversion component 61 and a second switch 62;

[0111] One end of the second power conversion component 61 is connected to an output end of the power distribution unit PDU40, and the other end of the second power conversion component 61 is connected to the second switch 62;

[0112] The second switch 62 is connected to another output terminal of the power distribution unit PDU40 and the bus 20;

[0113] The electronic control unit ECU10 is specifically used to determine whether the vehicle's driving speed is greater than a first threshold when it is determined that the current power is greater than a preset power and the vehicle is determined to be in a first braking state based on the operating condition, and if so, control the first switch 51 and the second switch 61 to be closed, so that the current distributed by the power distribution unit PDU40 passes through the first power conversion component 51 and the second power conversion component 61;

[0114] The first power conversion component 51 and the second power conversion component 61 jointly consume the electric energy corresponding to the current.

[0115] Optionally, the second electric energy conversion component 61 is used to convert electric energy into other energy, such as thermal energy.

[0116] In a specific implementation, when the electronic control unit ECU10 determines that the vehicle is in the first braking state, it continues to determine whether the driving speed of the vehicle is greater than the first threshold value. If so, it means that only turning on the first braking power reduction module 50 cannot eliminate a large amount of current; based on this, the first switch 51 and the second switch 61 are controlled to be closed. At this time, the first power conversion component 51 and the second power conversion component 61 are connected, so that the alternating current distributed by the power distribution unit PDU40 flows through the first power conversion component 51 and the second power conversion component 61 in sequence.

[0117] The first power conversion component 51 and the second power conversion component 61 sequentially convert the power corresponding to the current flowing through themselves into other energy to consume the corresponding power.

[0118] Optionally, when the power of the battery 30 is less than a preset power, the electronic control unit ECU10 controls the first switch 52 and the second switch 62 to be disconnected, so that the current is quickly switched to the original circuit to charge the battery with the electric energy generated by the reverse drag of the motor.

[0119] Continue to see Figure 4 , the second braking power reduction module 60 further includes a second relay 63;

[0120] One end of the second relay 63 is connected to the connection point between the second switch 62 and the power distribution unit PDU40, and the other end of the second relay 63 is connected to the bus 20;

[0121] The second relay 63 is used to process other energy converted from the electric energy consumed by the second electric energy conversion component 61 through the bus 20 .

[0122] Specifically, the second relay 63 sends other energy converted from the electric energy consumed by the second electric energy conversion component 61 to other devices through the bus 20 for use.

[0123] Optionally, the second electric energy conversion component 61 may also be a resistance wire.

[0124] Specifically, if the second power conversion component 61 is a resistance wire, the second power conversion component 61 converts the electric energy corresponding to the alternating current into thermal energy, and the second relay 63 sends the thermal energy to other devices through the bus 20.

[0125] In the embodiment of the present invention, when the ECU determines that the current power is greater than the preset power and determines that the vehicle is in the first braking state based on the operating condition, it determines whether the first braking power reduction module can consume a large amount of current generated by the engine. If not, the first braking power reduction module and the second pair of current braking power reduction modules arranged in front of the battery are used to jointly perform energy conversion to increase the consumption of braking power, so that the vehicle meets the braking power requirements, thereby greatly improving the driving safety of the mining truck.

[0126] Optionally, the braking system of the new energy mining truck shown above can be set in a vehicle, and the vehicle also includes an ISG motor, an MCU, a drive motor, a gearbox, a hydraulic motor and a hydraulic pump, etc. Figure 5 shown.

[0127] In an embodiment of the present invention, in the braking system of the new energy mining truck in the vehicle, when it is determined that the current power is greater than the preset power and the vehicle is determined to be in the first braking state based on the operating condition, the first braking power reduction module is used, or the first braking power reduction module and the second braking power reduction module actively consume electric energy to increase the consumption of braking power, so that the vehicle meets the braking power demand, which greatly improves the driving safety of the mining truck.

[0128] Optionally, based on the braking system of the new energy mining truck shown in the above embodiment of the present invention, the embodiment of the present invention also shows a schematic flow chart of a braking method of the new energy mining truck, such as Figure 6 The method comprises:

[0129] Step S601: The electronic control unit ECU obtains the current power level and operating conditions of the battery in real time;

[0130] In the specific implementation of step S601, the ECU detects the change of the power in the battery in real time to obtain the current power; then, determines whether the vehicle is in a running state, and if the vehicle is in a running state, obtains the current running condition of the vehicle;

[0131] Step S602: The ECU determines whether the current power level is greater than the preset power level, and determines whether the vehicle is in the first braking state based on the operating condition. When it is determined that the current power level is greater than the preset power level, and the vehicle is in the first braking state based on the operating condition, step S603 is executed. If the current power level is less than the preset power level, or it is determined that the vehicle is not in the first braking state based on the operating condition, it means that the braking system of the current vehicle can meet the braking power requirement, and the process returns to step S602.

[0132] In the process of implementing step S602, it is determined whether the running speed of the vehicle is greater than the preset speed, and when the road section where the vehicle is located is a steep slope section, it is determined that the vehicle is in the first braking state, that is, an emergency braking state, and step S603 is executed. If any one of them is no, it returns to continue executing step S602.

[0133] Step S603: the ECU controls the first brake power reduction module to start, so that the current distributed by the power distribution unit PDU flows through the first brake power reduction module;

[0134] Step S604: the first braking power reduction module consumes the electric energy corresponding to the current.

[0135] The specific process of implementing step S603 and step S604 includes: controlling the first switch to close so that the AC current distributed by the power distribution unit PDU passes through the first power conversion component; and the first power conversion component consumes the electric energy corresponding to the AC current.

[0136] Optionally, the first relay processes other energy converted from the electric energy consumed by the first electric energy conversion component through a bus.

[0137] It should be noted that the process of specifically implementing the braking method of the new energy mining truck is the same as the process of the braking system of the new energy mining truck described above and can be referred to each other.

[0138] In the embodiment of the present invention, when the ECU determines that the current power is greater than the preset power and determines that the vehicle is in the first braking state based on the operating condition, the ECU uses the first braking power reduction module arranged in front of the battery to convert the current into energy to increase the consumption of braking power, so that the vehicle meets the braking power requirement, thereby greatly improving the driving safety of the mining truck.

[0139] Optionally, based on the braking method of the new energy mining truck shown in the above embodiment of the present invention, the method further includes:

[0140] Step S11: The electronic control unit ECU obtains the current power level and operating conditions of the battery in real time;

[0141] In the specific implementation of step S11, the ECU detects the change of the power in the battery in real time to obtain the current power; then, determines whether the vehicle is in a running state, and if the vehicle is in a running state, obtains the current running condition of the vehicle;

[0142] Step S12: The electronic control unit ECU determines whether the current power is greater than the preset power, and determines whether the vehicle is in the first braking state based on the operating condition. When it is determined that the current power is greater than the preset power, and the vehicle is in the first braking state based on the operating condition, step S13 is executed. If the current power is less than the preset power, or it is determined that the vehicle is not in the first braking state based on the operating condition, it means that the braking system of the current vehicle can meet the braking power requirement, and the process returns to step S12.

[0143] In the process of implementing step S12, it is determined whether the running speed of the vehicle is greater than the preset speed, and when the road section where the vehicle is located is a steep slope section, it is determined that the vehicle is in the first braking state, that is, an emergency braking situation, and step S13 is executed. If any one of them is no, it returns to continue executing step S12.

[0144] Step S13: Determine whether the driving speed of the vehicle is greater than a first threshold value, if so, execute step S14, if not, execute steps S603 to S604.

[0145] Step S14: controlling the first braking power reduction module and the second braking power reduction module to start, so that the current distributed by the power distribution unit PDU flows through the first braking power reduction module and the second braking power reduction module;

[0146] In the specific implementation of step S14, the first switch and the second switch are controlled to be closed, so that the current distributed by the power distribution unit PDU passes through the first power conversion component and the second power conversion component;

[0147] Step S15: the first braking power reduction module and the second braking power reduction module consume the electric energy corresponding to the current.

[0148] Optionally, the second relay processes other energy converted from the electric energy consumed by the second electric energy conversion component through a bus.

[0149] Optionally, the ECU is further used to: when it is determined that the environmental condition is in a low-temperature operating state, control the second brake power reduction module to start, so that the second brake power reduction module obtains corresponding current and converts it into heat energy.

[0150] In an embodiment of the present invention, in the braking system of the new energy mining truck in the vehicle, when it is determined that the current power is greater than the preset power and the vehicle is determined to be in the first braking state based on the operating condition, the first braking power reduction module is used, or the first braking power reduction module and the second braking power reduction module actively consume the battery power to increase the consumption of braking power, so that the vehicle meets the braking power demand, which greatly improves the driving safety of the mining truck.

[0151] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without creative work.

[0152] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0153] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A braking system for a new energy mining truck, characterized in that: The system comprises: The electronic control unit ECU is connected to the battery and the power distribution unit PDU through a bus; The battery is connected to the power distribution unit PDU; A first braking power reduction module is provided between the battery and a power distribution unit PDU; The electronic control unit ECU is used to obtain the current power of the battery and the operating condition in real time; when it is determined that the current power is greater than the preset power and the vehicle is determined to be in the first braking state based on the operating condition, the first braking power reduction module is controlled to start, so that the current distributed by the power distribution unit PDU flows through the first braking power reduction module; The first braking power reduction module consumes the electric energy corresponding to the current.

2. The system according to claim 1, characterized in that The first braking power reduction module comprises: The first brake power reduction module includes a first electric energy conversion component and a first switch; One end of the first power conversion component is connected to an output end of the power distribution unit PDU, and the other end of the first power conversion component is connected to the first switch; The first switch is connected to another output end of the power distribution unit PDU; The electronic control unit ECU is specifically configured to control the first switch to close when it is determined based on the operating condition that the vehicle is in the first braking state, so that the current distributed by the power distribution unit PDU passes through the first power conversion component; The first electric energy conversion component consumes the electric energy corresponding to the current.

3. The system according to claim 2, characterized in that The first brake power reduction module also includes a first relay; One end of the first relay is connected to the connection point between the first switch and the power distribution unit PDU, and the other end of the first relay is connected to the bus; The first relay is used to process other energy converted from the electric energy consumed by the first electric energy conversion component through a bus.

4. The system according to claim 1, characterized in that Also includes: a second brake power reduction module; The second brake power reduction module is disposed between the first brake power reduction module and the battery; The electronic control unit ECU is further configured to, when it is determined that the current power is greater than a preset power and the vehicle is determined to be in a first braking state based on the operating condition, determine whether the driving speed of the vehicle is greater than a first threshold, and if so, control the first braking power reduction module and the second braking power reduction module to start, so that the current distributed by the power distribution unit PDU flows through the first braking power reduction module and the second braking power reduction module; The first braking power reduction module and the second braking power reduction module consume the electric energy corresponding to the current.

5. The system according to claim 4, characterized in that The ECU is also used to: When it is determined that the environmental condition is in a low-temperature operating state, the second brake power reduction module is controlled to start, so that the second brake power reduction module obtains the corresponding current and converts it into heat energy.

6. The system according to claim 3, characterized in that The second braking power reduction module comprises: The second brake power reduction module includes a second electric energy conversion component and a second switch; One end of the second power conversion component is connected to an output end of the power distribution unit PDU, and the other end of the second power conversion component is connected to the second switch; The second switch is connected to another output terminal of the power distribution unit PDU and a bus; The electronic control unit ECU is specifically configured to, when it is determined that the current power is greater than a preset power and the vehicle is determined to be in a first braking state based on the operating condition, determine whether the driving speed of the vehicle is greater than a first threshold, and if so, control the first switch and the second switch to be closed, so that the current distributed by the power distribution unit PDU passes through the first power conversion component and the second power conversion component; The first power conversion component and the second power conversion component jointly consume the electric energy corresponding to the current.

7. The system according to claim 6, characterized in that The second brake power reduction module also includes a second relay; One end of the second relay is connected to the connection point between the second switch and the power distribution unit PDU, and the other end of the second relay is connected to the bus; The second relay is used to process other energy converted from the electric energy consumed by the second electric energy conversion component through a bus.

8. A braking method for a new energy mining truck, characterized in that: A braking system for a new energy mining truck according to any one of claims 1 to 7, wherein the method comprises: The electronic control unit ECU obtains the current power level and operating condition of the battery in real time; When the electronic control unit ECU determines that the current power is greater than the preset power and determines that the vehicle is in the first braking state based on the operating condition, the electronic control unit ECU controls the first braking power reduction module to start, so that the current distributed by the power distribution unit PDU flows through the first braking power reduction module; The first braking power reduction module consumes the electric energy corresponding to the current.

9. The method according to claim 8, characterized in that The braking system of the new energy mining truck further includes a second braking power reduction module; the method further includes: When the electronic control unit ECU determines that the current power is greater than the preset power and determines that the vehicle is in the first braking state based on the operating condition, it determines whether the driving speed of the vehicle is greater than a first threshold value, and if so, controls the first braking power reduction module and the second braking power reduction module to start, so that the current distributed by the power distribution unit PDU flows through the first braking power reduction module and the second braking power reduction module; The first braking power reduction module and the second braking power reduction module consume the electric energy corresponding to the current.

10. A vehicle, characterized in that: The invention comprises a braking system for a new energy mining truck as described in claims 1 to 7, wherein the braking system is used to execute a braking method for a new energy mining truck as described in any one of claims 8 to 9.

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