Braking system, method and vehicle for a new energy mine truck

Abstract

The application provides a new energy mine truck brake system, method and 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 brake power reduction module is arranged between the battery and the PDU; the ECU is used for controlling the first brake power reduction module to start when it is determined that the current electric quantity is greater than a preset electric quantity and the vehicle is in a first brake state based on an operation condition, so that the current distributed by the PDU flows through the first brake power reduction module; and the first brake power reduction module consumes the electric energy corresponding to the current. When the ECU determines that the current electric quantity is greater than the preset electric quantity and the vehicle is in the first brake state based on the operation condition, the first brake power reduction module arranged in front of the battery is used for energy conversion of the current, so that the consumption of brake power is improved, and the vehicle meets the brake power demand, thereby greatly improving the driving safety of the mine truck.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of brake control, in particular to a brake system, method and vehicle of a new energy mine truck. BACKGROUND

[0002] The mine truck using clean energy (such as electric, natural gas, hydrogen fuel, etc.) as power, namely hybrid or pure electric new energy mine truck, has two braking modes, one is the braking of service brake system, and the other is the braking of auxiliary brake 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 / counter drag); but when the battery power reaches 100%, the motor braking of the auxiliary brake system will be disabled. Due to the large slope of the mine area and the high load of the mine truck, only using the service brake system and the motor counter drag of the auxiliary brake system for braking cannot meet the braking power demand, thereby affecting the driving safety of the mine truck. SUMMARY

[0004] Therefore, the embodiments of the present application provide a brake system, method and vehicle of a new energy mine truck to solve the problem that the prior art cannot meet the braking power demand, thereby affecting the driving safety of the mine truck.

[0005] To achieve the above object, the embodiments of the present application provide the following technical scheme:

[0006] The first aspect of the embodiments of the present application shows a brake system of a new energy mine truck, which comprises:

[0007] An electronic control unit ECU is connected to a battery and a 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 arranged between the battery and the power distribution unit PDU;

[0010] The electronic control unit ECU is configured to acquire the current power of the battery and the operating condition in real time, and when it is determined that the current power is greater than a preset power and the vehicle is in a 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;

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

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

[0013] The first braking power reduction module comprises a first electric energy conversion component and a first switch.

[0014] One end of the first electric energy conversion component is connected to an output end of the power distribution unit PDU, and the other end of the first electric energy 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 be closed when it is determined that the vehicle is in the first braking state based on the operating condition, so that the current distributed by the power distribution unit PDU passes through the first electric energy conversion component.

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

[0018] Optionally, the first braking power reduction module further comprises a first relay.

[0019] One end of the first relay is connected to the connection 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 configured to process other energy converted by the first electric energy conversion component through the bus.

[0021] Optionally, the method further comprises: a second braking power reduction module.

[0022] The second braking power reduction module is arranged between the first braking power reduction module and the battery.

[0023] The electronic control unit ECU is further configured to determine whether the driving speed of the vehicle is greater than a first threshold value when it is determined that the current electric quantity is greater than the preset electric quantity and that the vehicle is in the first braking state based on the operating condition, and control the first braking power reduction module and the second braking power reduction module to start if the driving speed of the vehicle is greater than the first threshold value, 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 electric energy corresponding to the current.

[0025] Optionally, the ECU is further configured to:

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

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

[0028] The second braking power reduction module comprises a second electric energy conversion assembly and a second switch.

[0029] One end of the second electric energy conversion assembly is connected to an output end of the power distribution unit PDU, and the other end of the second electric energy conversion assembly is connected to the second switch.

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

[0031] The electronic control unit ECU is specifically configured to determine whether the driving speed of the vehicle is greater than a first threshold value when it is determined that the current electric quantity is greater than a preset electric quantity and the vehicle is in a first braking state based on the operating condition, 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 electric energy conversion assembly and the second electric energy conversion assembly.

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

[0033] Optionally, the second braking power reduction module further comprises a second relay.

[0034] One end of the second relay is connected to the connection 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 configured to process other energy converted by the second electric energy conversion assembly consuming electric energy through the bus.

[0036] The second aspect of the embodiment of the application shows a braking method of a new energy mine truck, which is suitable for the braking system of the new energy mine truck shown in the first aspect of the embodiment of the application, and the method comprises:

[0037] The electronic control unit ECU acquires the current electric quantity of the battery and the operating condition in real time.

[0038] The electronic control unit ECU controls the first braking power reduction module to start when it is determined that the current electric quantity is greater than a preset electric quantity and the vehicle is in a first braking state based on the operating condition, so that the current distributed by the power distribution unit PDU passes through the first braking power reduction module.

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

[0040] Optionally, the new energy mine truck brake system further comprises a second brake power reduction module; the method further comprises:

[0041] The electronic control unit ECU determines whether the driving speed of the vehicle is greater than a first threshold value 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, and if so, controls the first brake power reduction module and the second 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 and the second brake power reduction module.

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

[0043] The third aspect of the embodiment of the application shows a vehicle comprising the brake system of the first aspect of the application, which is used to execute the brake method shown in the first aspect of the application.

[0044] Based on the new energy mine truck brake system, method and vehicle provided in the above embodiment of the application, the system comprises: an electronic control unit ECU 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 brake power reduction module is arranged between the battery and the power distribution unit PDU; the electronic control unit ECU is used to acquire 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 in the first braking state based on the operating condition, the first brake power reduction module is controlled to start, so that the current distributed by the power distribution unit PDU flows through the first brake power reduction module; and the first brake power reduction module consumes the electric energy corresponding to the current. In the embodiment of the application, 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, the first brake power reduction module arranged in front of the battery is used to convert the electric energy of the current, so as to improve the consumption of brake power, so that the vehicle meets the brake power demand, and the driving safety of the mine truck is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor based on the provided drawings.

[0046] Figure 1A schematic diagram of a braking system of a new energy mine truck is shown in the embodiment of the present application.

[0047] Figure 2 A schematic diagram of a braking system of another new energy mine truck is shown in the embodiment of the present application.

[0048] Figure 3 A schematic diagram of a braking system of still another new energy mine truck is shown in the embodiment of the present application.

[0049] Figure 4 A schematic diagram of a braking system of yet another new energy mine truck is shown in the embodiment of the present application.

[0050] Figure 5 A schematic diagram of a vehicle is shown in the embodiment of the present application.

[0051] Figure 6 A flowchart of a braking method of a new energy mine truck is shown in the embodiment of the present application. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0053] The terms "first", "second", "third", "fourth" and the like (if any) in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to include only those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to the process, method, product or device.

[0054] It should be noted that the description of "first", "second" and the like in the present application is only for the purpose of description and cannot be understood as indicating or implying the relative importance of the technical features indicated or implying the number of technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0055] In the present application, the term "including", "containing" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment. Without more limitations, the element defined by the sentence "including a" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

[0056] As the background art is known, in order to improve the safety performance of the whole vehicle, some products increase the electric eddy current brake on the output shaft of the gearbox for auxiliary braking, the self weight of the electric eddy current brake reaches 200~500kg, the heat generation is large during long time work, the temperature can reach 300~700℃, the braking effect presents thermal decay of 30~50%, and a certain arrangement space is required on the whole vehicle, and the price is expensive.

[0057] Because the electric eddy current brake has a large self weight, a certain arrangement space is required, the heat generation is large during long time work, and because the rotating part is increased, the failure risk is also increased.

[0058] The purpose of the present application is to use the existing parts on the new energy mine truck transmission system to realize the increase of the braking mode and improve the safety.

[0059] Reference Figure 1 A schematic diagram of the architecture of a braking system of a new energy mine truck is shown for the embodiment of the present application, the system comprises an electronic control unit ECU 10, a bus 20, a battery 30, a power distribution unit PDU 40 and a first braking power reduction module 50;

[0060] The electronic control unit ECU 10 connects the battery 30 and the power distribution unit PDU 40 through the bus 20;

[0061] The battery 30 is connected with the power distribution unit PDU 40;

[0062] A first brake power reduction module 50 is arranged between the battery 30 and the power distribution unit PDU 40.

[0063] Optionally, if the vehicle is a hybrid vehicle, Figure 1 It is also shown that an engine, a micro control unit MCU and an ISG motor are arranged between the battery 30 and the power distribution unit PDU 40, and an AC-DC module (not shown in the figure) is arranged between the battery 30 and the power distribution unit PDU 40; when the engine generates AC power, the MCU controls the ISG motor to send the AC power to the power distribution unit PDU 40, so that the power distribution unit PDU 40 sends the AC power to the AC-DC module, so that the AC-DC module converts it into DC power to charge the battery.

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

[0065] The electronic control unit ECU 10 is configured to acquire 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 a preset power and the vehicle is in a first braking state based on the operating condition, the electronic control unit ECU 10 controls the first brake power reduction module 50 to start, so that the current distributed by the power distribution unit PDU 40 flows through the first brake power reduction module 50.

[0066] Optionally, when it is determined that the current power is greater than a preset power and the vehicle is in a first braking state based on the operating condition, the electronic control unit ECU 10 controls the first brake power reduction module 50 to start, and controls the first brake power reduction module 50 to consume the power of the battery 30.

[0067] It should be noted that the first brake power reduction module 50 can not only consume the current distributed by the power distribution unit PDU 40, but also consume the power 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 acquire the current power; then, it is determined whether the vehicle is in an operating state, and if the vehicle is in the operating state, the operating condition of the current vehicle is acquired;

[0069] The operating condition of the vehicle includes the operating speed of the vehicle and whether the road section where the vehicle is located is a large slope road section.

[0070] Then, the ECU 10 determines whether the running speed of the vehicle is greater than a preset speed and the road section where the vehicle is located is a large slope road section, and when the user is braking or the vehicle enters the braking mode, it is determined that the vehicle is in the first braking state, that is, the emergency braking condition, and the first braking power reduction module 50 is started to make the current distributed by the power distribution unit PDU 40 flow through the first braking power reduction module 50.

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

[0072] Optionally, based on the above Figure 1 The new energy mine truck brake system is shown, and the specific architecture of the first braking power reduction module 50 is shown, such as Figure 2 As shown, the first braking power reduction module 50 includes a first electrical energy conversion assembly 51 and a first switch 52.

[0073] One end of the first electrical energy conversion assembly 51 is connected to an output end of the power distribution unit PDU 40, and the other end of the first electrical energy conversion assembly 51 is connected to the first switch 52.

[0074] The first switch 52 is connected to another output end of the power distribution unit PDU 40.

[0075] Wherein, one end of the first electrical energy conversion assembly 51 is connected between the power distribution unit PDU 40 and the battery 30, and one end of the first switch 52 is also connected between the power distribution unit PDU 40 and the battery 30.

[0076] The electronic control unit ECU 10 is specifically used for controlling the first switch 52 to be closed when the vehicle is in the first braking state based on the running condition, so that the current distributed by the power distribution unit PDU 40 flows through the first electrical energy conversion assembly 51.

[0077] The first electrical energy conversion assembly 51 consumes the electrical energy corresponding to the current.

[0078] Optionally, the first electrical energy conversion assembly 51 is used to convert electrical energy into other energy, such as heat energy, etc.

[0079] In a specific implementation, the electronic control unit ECU 10 controls the first switch 52 to be closed when the vehicle is in the first braking state, and the first electrical energy conversion assembly 51 is connected at this time, so that the current distributed by the power distribution unit PDU 40 flows through the first electrical energy conversion assembly 51.

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

[0081] Optionally, when the battery 30 has less than a preset amount of electricity, the electronic control unit ECU 10 controls the first switch 52 to be turned off, so that the current is quickly switched to the original circuit, so as to charge the battery with the electric energy generated by the motor reverse dragging.

[0082] Continuing to refer to Figure 2 , the first brake power reduction module 50 further comprises a first relay 53;

[0083] One end of the first relay 53 is connected to the connection between the first switch 52 and the power distribution unit PDU 40, 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 by the first electric energy conversion assembly 51 through the bus 20.

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

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

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

[0088] In the embodiment of the application, since the first brake power reduction module is arranged at the battery accessory, a large amount of heat can be directly dissipated outward, and when the ECU determines that the current amount of electricity is greater than the preset amount of electricity and the vehicle is in the first braking state based on the operating condition, the first brake power reduction module arranged in front of the battery is used to convert the electric energy, and the electric energy in the battery can also be directly consumed, so as to improve the consumption of the braking power, so that the vehicle meets the braking power demand, and the driving safety of the mine truck is greatly improved.

[0089] Optionally, based on the brake system of the new energy mine truck shown in the above embodiment of the application, correspondingly, in combination with Figure 1 , referring to Figure 3 , another brake system of a new energy mine truck is shown in the embodiment of the application, and the system comprises:

[0090] An electronic control unit ECU 10, a bus 20, a battery 30, a power distribution unit PDU 40, a first brake power reduction module 50, and a second brake power reduction module 60;

[0091] The electronic control unit ECU 10 is connected to the battery 30 and the power distribution unit PDU 40 through a bus 20;

[0092] The battery 30 is connected to the power distribution unit PDU 40;

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

[0094] The first braking power reduction module 50 is arranged 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 It is also shown that an AC-DC module (not shown in the figure) is arranged between the battery 30 and the power distribution unit PDU 40; when the engine generates alternating current, the alternating current is sent to the power distribution unit PDU 40, so that the power distribution unit PDU 40 sends the alternating current to the AC-DC module, so that the AC-DC module converts it into direct current to charge the battery.

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

[0097] The electronic control unit ECU 10 is also used to determine whether the current power is greater than the preset power and whether the vehicle is in a first braking state based on the running condition when the current power is greater than the preset power, 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 40 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 according to 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, it is determined whether the vehicle is in a running state, and if the vehicle is in a running state, the running condition of the current vehicle is obtained;

[0101] The running condition of the vehicle comprises a running speed of the vehicle and whether a road section where the vehicle is located is a large slope road section.

[0102] Then, the ECU 10 determines whether the running speed of the vehicle is greater than a preset speed and the road section where the vehicle is located is a large slope road section, and determines that the vehicle is in a first braking state, i.e., an emergency braking condition, and continues to determine whether the running speed of the vehicle is greater than a first threshold value, and if yes, it is indicated that 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 PDU 40 flows through the first braking power reduction module 50 and the second braking power reduction module 60; and the first braking power reduction module 50 and the second braking power reduction module 60 consume the electric energy corresponding to the current.

[0103] Optionally, the ECU 10 is further configured to:

[0104] When it is determined that the environmental condition is in a low-temperature running state, the second braking power reduction module 60 is controlled to be started, 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, and if the temperature is less than a preset temperature, it is determined that the environmental condition is in a low-temperature running state, i.e., when driving in winter or a low-temperature environment such as a plateau and a high-cold area, the second braking power reduction module 60 is controlled to be turned on, so as to convert the electric energy corresponding to the current distributed by the power distribution unit PDU 40 into heat energy, so as to be sent to other devices through the bus 20 and heat the other devices;

[0106] For example, the bus 20 is used to send the heat energy to an engine oil tank, a urea tank, and / or cooling liquid, so as to heat the engine oil tank, the urea tank, and / or the cooling liquid.

[0107] Optionally, the second braking power reduction module 60 can be provided with a driver's cabin, so as to serve as an auxiliary warm air heat source and improve the comfort of a driver.

[0108] The second braking power reduction module in the embodiment of the application is arranged near the PDU, so as to be controlled to be turned on to convert the electric energy into heat energy to heat other devices when it is determined that the environmental condition is in a low-temperature running state, thereby improving the reliability, economy, and power performance of the whole vehicle.

[0109] Optionally, the electric energy consumption capability of the first brake power reduction module 50 is greater than the electric energy consumption capability of the second brake power reduction module 60, the first brake power reduction module 50 can directly convert alternating current and / or direct current, and the second brake power reduction module 60 can only convert direct current.

[0110] Optionally, based on the above-mentioned application of the present application Figure 3 The brake system of the new energy mine truck is shown, and the specific architecture of the second brake power reduction module 60 is shown. Figure 4 As shown, the second brake power reduction module 60 includes a second electric energy conversion component 61 and a second switch 62.

[0111] One end of the second electric energy conversion component 61 is connected to an output end of the power distribution unit PDU 40, and the other end of the second electric energy conversion component 61 is connected to the second switch 62.

[0112] The second switch 62 is connected to another output end of the power distribution unit PDU 40 and the bus 20.

[0113] The electronic control unit ECU 10 is specifically used for determining whether the running speed of the vehicle is greater than a first threshold value when it is determined that the current electric quantity is greater than the preset electric quantity and the vehicle is in the first braking state based on the running condition, and if so, controlling the first switch 51 and the second switch 61 to be closed, so that the current distributed by the power distribution unit PDU 40 flows through the first electric energy conversion component 51 and the second electric energy conversion component 61.

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

[0115] Optionally, the second electric energy conversion component 61 is used for converting electric energy into other energy, such as heat energy, etc.

[0116] In a specific implementation, the electronic control unit ECU 10 continues to determine whether the running speed of the vehicle is greater than the first threshold value when it is determined that the vehicle is in the first braking state, and if so, it is indicated that only starting the first brake 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 electric energy conversion component 51 and the second electric energy conversion component 61 are connected in communication, so that the alternating current distributed by the power distribution unit PDU 40 flows through the first electric energy conversion component 51 and the second electric energy conversion component 61 in sequence.

[0117] The first electric energy conversion component 51 and the second electric energy conversion component 61 convert the electric energy corresponding to the current flowing through themselves into other energy in sequence, so as to consume the corresponding electric energy.

[0118] Optionally, when the battery 30 has less than a preset amount of electricity, the electronic control unit ECU 10 controls the first switch 52 and the second switch 62 to be disconnected, so that the current is quickly switched to the original circuit, so as to charge the battery with the electric energy generated by the motor reverse dragging.

[0119] Continuing to refer to Figure 4 , the second brake power reduction module 60 further comprises a second relay 63;

[0120] One end of the second relay 63 is connected to the connection between the second switch 62 and the power distribution unit PDU 40, and the other end of the second relay 63 is connected to the bus 20;

[0121] The second relay 63 is used for processing other energy converted by the second electric energy conversion assembly 61 through the bus 20.

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

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

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

[0125] In the embodiment of the application, when the ECU determines that the current amount of electricity is greater than the preset amount of electricity and the vehicle is in the first braking state based on the running condition, it is determined whether the first brake power reduction module can consume a large amount of current generated by the engine, and if not, the first brake power reduction module and the second pair of current brake power reduction modules are used to jointly convert energy, so as to improve the consumption of brake power, so that the vehicle meets the brake power demand, greatly improving the driving safety of the mine truck.

[0126] Optionally, the brake system of the new energy mine truck shown in the above can be arranged in a vehicle, and the vehicle further comprises an ISG motor, an MCU, a driving motor, a gearbox, a hydraulic motor and a hydraulic pump, etc., as shown in Figure 5 .

[0127] In the embodiment of the present application, in the braking system of the new energy mine truck in the vehicle, when it is determined that the current electric quantity is greater than the preset electric quantity and the vehicle is in the first braking state based on the running condition, the first braking power consumption module or the first braking power consumption module and the second braking power consumption module are used to actively consume electric energy, so as to improve the consumption of braking power, so that the vehicle meets the braking power demand, and the driving safety of the mine truck is greatly improved.

[0128] Optionally, based on the braking system of the new energy mine truck shown in the embodiment of the present application, a corresponding flowchart of a braking method of the new energy mine truck is also shown in the embodiment of the present application, as shown in Figure 6 The method comprises:

[0129] Step S601: an electronic control unit ECU acquires the current electric quantity of the battery and the running condition in real time;

[0130] In the process of specifically implementing step S601, the ECU detects the change of the electric quantity in the battery in real time to acquire the current electric quantity, and then determines whether the vehicle is in the running state, and if the vehicle is in the running state, the running condition of the current vehicle is acquired;

[0131] Step S602: the ECU determines whether the current electric quantity is greater than the preset electric quantity and whether the vehicle is in the first braking state based on the running condition, and when it is determined that the current electric quantity is greater than the preset electric quantity and the vehicle is in the first braking state based on the running condition, step S603 is executed, and if the current electric quantity is less than the preset electric quantity or the vehicle is not in the first braking state based on the running condition, it indicates that the braking system of the current vehicle can meet the braking power demand, and step S602 is returned to be executed.

[0132] In the process of specifically implementing step S602, when it is determined that the running speed of the vehicle is greater than the preset speed and the road section where the vehicle is located is a large slope road section, it is determined that the vehicle is in the first braking state, that is, the emergency braking condition, and step S603 is executed, and if either is not, step S602 is returned to be continuously executed.

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

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

[0135] The process of implementing steps S603 and S604 comprises: controlling the first switch to be closed, so that the alternating current distributed by the power distribution unit PDU passes through the first electric energy conversion assembly; and the first electric energy conversion assembly consumes the electric energy corresponding to the alternating current.

[0136] Optionally, the first relay processes other energy converted by the first electric energy conversion assembly consuming electric energy.

[0137] It should be noted that the process of implementing the braking method of the new energy mine truck is the same as the process of the braking system of the new energy mine truck, and they can be mutually referred to.

[0138] In the embodiment of the present application, when the ECU determines that the current electric quantity is greater than the preset electric quantity and the vehicle is in the first braking state based on the running condition, the first braking power reduction module arranged in front of the battery is used to convert the electric current to improve the consumption of braking power, so that the vehicle meets the braking power demand, and the driving safety of the mine truck is greatly improved.

[0139] Optionally, based on the braking method of the new energy mine truck shown in the above embodiment of the present application, the method further comprises:

[0140] Step S11: the electronic control unit ECU acquires the current electric quantity of the battery and the running condition in real time;

[0141] In the process of implementing step S11, the ECU detects the change of the electric quantity in the battery in real time to acquire the current electric quantity, and then determines whether the vehicle is in the running state, and if the vehicle is in the running state, the running condition of the current vehicle is acquired;

[0142] Step S12: the electronic control unit ECU determines whether the current electric quantity is greater than the preset electric quantity, and determines whether the vehicle is in the first braking state based on the running condition; when it is determined that the current electric quantity is greater than the preset electric quantity and the vehicle is in the first braking state based on the running condition, step S13 is executed; if the current electric quantity is less than the preset electric quantity, or the vehicle is not in the first braking state based on the running condition, it indicates that the braking system of the current vehicle can meet the braking power demand, and step S12 is returned to be executed.

[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 the road section where the vehicle is located is a large slope road section, and if so, it is determined that the vehicle is in the first braking state, i.e., the emergency braking condition, and step S13 is executed; if not, step S12 is returned to be continuously executed.

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

[0145] Step S14: controlling the first brake power reduction module and the second 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 and the second brake power reduction module.

[0146] In the process of specifically implementing 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 flows through the first electric energy conversion assembly and the second electric energy conversion assembly.

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

[0148] Optionally, the second relay processes other energy converted by the second electric energy conversion assembly through the bus.

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

[0150] In the embodiment of the application, the brake system of the new energy mine truck in the vehicle, when it is determined that the current electric quantity is greater than the preset electric quantity, and the vehicle is in the first braking state based on the running condition, the first brake power reduction module or the first brake power reduction module and the second brake power reduction module actively consume the battery electric quantity, so as to improve the consumption of brake power, so that the vehicle meets the brake power demand, and the driving safety of the mine truck is greatly improved.

[0151] Each of the embodiments in the specification is described in a progressive manner, and the same and similar parts of each embodiment can be referred to each other. Each embodiment focuses on the difference from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, it is described more simply, and the relevant part can be referred to the part of the method embodiment. The above-described system and system embodiment are only illustrative, and the units described as separate components can be or can not be physically separated, and the components displayed as units can be or can not be physical units, that is, they can be located in one place or distributed on multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment scheme according to the actual needs. Those skilled in the art can understand and implement without creative labor.

[0152] Those skilled in the art will further appreciate that the units and algorithms described in connection with the examples disclosed herein can be embodied directly in hardware, in software, or in a combination of the two. For the sake of brevity, descriptions of a method of execution of the examples will not be repeated here in detail, as the general principles have already been described above. The skilled person can use different methods to implement the described functions, depending on the particular application and design constraints of the technical solution. These implementations should not be considered to be outside the scope of the present application.

[0153] The above description of disclosed embodiments enables a person skilled in the art to implement or use the application. Numerous modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the application. Therefore, the present application is not to be limited to the embodiments shown herein but is to be accorded 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: An electronic control unit ECU is connected with a battery and a power distribution unit PDU through a bus; The battery is connected with the power distribution unit PDU; A first braking power reduction module is arranged between the battery and the power distribution unit PDU; A second braking power reduction module is arranged between the first braking power reduction module and the battery; The electronic control unit ECU is configured to acquire a current power of the battery and an operating condition in real time, and control the first braking power reduction module to start when it is determined that the current power is greater than a preset power and the vehicle is in a first braking state based on the operating condition, 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; The electronic control unit ECU is configured to determine whether the driving speed of the vehicle is greater than a first threshold value 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, and control the first braking power reduction module and the second braking power reduction module to start if yes, 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.

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

3. The system of claim 2, wherein, The first braking power reduction module further comprises a first relay; One end of the first relay is connected with the connection between the first switch and the power distribution unit PDU, and the other end of the first relay is connected with the bus; The first relay is configured to process other energy converted by the first electric energy conversion assembly through the bus.

4. The system of claim 1, wherein, The ECU is further configured to: When it is determined that the environmental condition is in a low-temperature operating state, control the second braking power reduction module to start, so that the second braking power reduction module acquires the corresponding current and converts it into heat energy.

5. The system of claim 2, wherein, The second braking power reduction module comprises: The second braking power reduction module comprises a second electric energy conversion assembly and a second switch; One end of the second electric energy conversion assembly is connected with an output end of the power distribution unit PDU, and the other end of the second electric energy conversion assembly is connected with the second switch; The second switch is connected with another output end of the power distribution unit PDU and the bus. The electronic control unit ECU is specifically configured to determine whether the running speed of the vehicle is greater than a first threshold value when it is determined that the current power is greater than a preset power and the vehicle is in a first braking state based on the running condition, 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 electric energy conversion assembly and the second electric energy conversion assembly. The first electric energy conversion assembly and the second electric energy conversion assembly jointly consume electric energy corresponding to the current.

6. The system of claim 5, wherein, The second braking power reduction module further comprises a second relay; One end of the second relay is connected to the connection 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 by the second electric energy conversion assembly through the bus.

7. A braking method for a new energy mine card, characterized in that, The method is suitable for the brake system of the new energy mine truck according to any one of claims 1 to 6, and the method comprises: The electronic control unit ECU acquires the current power of the battery and the running condition in real time; The electronic control unit ECU controls the first braking power reduction module to start when it is determined that the current power is greater than a preset power and the vehicle is in a first braking state based on the running condition, so that the current distributed by the power distribution unit PDU passes through the first braking power reduction module; The first braking power reduction module consumes electric energy corresponding to the current; The electronic control unit ECU determines whether the running speed of the vehicle is greater than a first threshold value when it is determined that the current power is greater than a preset power and the vehicle is in a first braking state based on the running condition, 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 passes 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 electric energy corresponding to the current.

8. A vehicle characterized by comprising: The brake system of the new energy mine truck according to any one of claims 1 to 6 is used to execute the brake method of the new energy mine truck according to claim 7.

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