Motor controller, motor control circuit, discharging system, whole vehicle control system and automobile

Abstract

The utility model discloses a motor controller, a motor control circuit, a discharge system, a whole vehicle control system and an automobile. The motor controller comprises a plurality of first bridge arms and further comprises a first inductor and / or a second inductor. The first ends of the plurality of first bridge arms are connected with the positive electrode of the power battery through the first switch and are connected with the first end of the direct-current charging port; the second ends of the plurality of first bridge arms are connected with the negative electrode of the power battery and the second end of the direct current charging port; the first end of the first inductor is connected with the midpoint of a first bridge arm, and the second end of the first inductor is connected with the positive electrode of the power battery through the second switch; the first end of the second inductor is connected with the midpoint of a first bridge arm, and the second end of the second inductor is connected with the first end of the direct current charging port through a third switch, so that a power battery can perform direct connection charging, boost charging or buck charging on an electric load, the first bridge arm is multiplexed, and switching of different discharging functions is realized by adding the inductors and the switches; the circuit is simple in structure, small in size and low in cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric automobile technical field especially relates to a motor controller, motor control circuit, discharge system, whole car control system and car. BACKGROUND

[0002] The electric automobile is equipped with large capacity electric energy storage device, when the electric automobile has direct current discharge function, it can provide electric energy for the load of family or emergency rescue, or provide charging service for other electric automobile, therefore, developing direct current discharge function of electric automobile helps to improve the use value of car. SUMMARY

[0003] The utility model embodiment provides a motor controller, motor control circuit, discharge system, whole car control system and car to solve the problem that the power battery has direct current charging function by increasing additional equipment.

[0004] A kind of motor controller, the motor controller includes multiple first bridge arms, the midpoint of multiple first bridge arms is used to connect motor, further include first inductance and / or second inductance;

[0005] The first end of multiple first bridge arms is used to connect the anode of power battery by first switch, and is used to connect the first end of direct current charging port;

[0006] The second end of multiple first bridge arms is used to connect the cathode of power battery and the second end of direct current charging port;

[0007] The first end of the first inductance is connected with the midpoint of a first bridge arm, and the second end of the first inductance is used to connect the anode of power battery by second switch;

[0008] The first end of the second inductance is connected with the midpoint of a first bridge arm, and the second end of the second inductance is used to connect the first end of direct current charging port by third switch.

[0009] A kind of motor control circuit, including above-mentioned motor controller and first switch, further include second switch and / or third switch;

[0010] The first switch is arranged between the anode of power battery and the first end of direct current charging port;

[0011] The first ends of the plurality of first bridge arms are connected to a connection node between the first switch and a first end of the DC charging port, and the second ends of the plurality of first bridge arms are connected to a negative electrode of the power battery and a second end of the DC charging port.

[0012] The first end of the second switch is connected to the second end of the first inductor, and the second end of the second switch is used for connecting a positive electrode of the power battery.

[0013] The first end of the third switch is connected to the second end of the second inductor, and the second end of the third switch is used for connecting the first end of the DC charging port.

[0014] Preferably, the motor control circuit further comprises a first capacitor connected across the plurality of first bridge arms.

[0015] A motor control circuit comprises a first motor controller, a second motor controller, and a first switch, and further comprises a second switch and / or a third switch.

[0016] The first switch is arranged between a positive electrode of the power battery and a first end of the DC charging port.

[0017] The first motor controller is the motor controller in the above embodiments; the first ends of the plurality of first bridge arms are connected to a connection node between the first switch and a first end of the DC charging port, and the second ends of the plurality of first bridge arms are connected to a negative electrode of the power battery and a second end of the DC charging port; the first end of the second switch is connected to the second end of the first inductor, and the second end of the second switch is used for connecting a positive electrode of the power battery; the first end of the third switch is connected to the second end of the second inductor, and the second end of the third switch is used for connecting the first end of the DC charging port.

[0018] The second motor controller comprises a plurality of second bridge arms, and the midpoints of the plurality of second bridge arms are used for connecting a generator; the first ends of the plurality of second bridge arms are connected to a connection node between a positive electrode of the power battery and the first switch, and the second ends of the plurality of second bridge arms are connected to a negative electrode of the power battery and a second end of the DC charging port.

[0019] Preferably, the motor control circuit further comprises a fourth switch.

[0020] One end of the fourth switch is connected to a positive electrode of the power battery, and the other end of the fourth switch is connected to the first ends of the plurality of second bridge arms and the first switch.

[0021] Preferably, the motor control circuit further comprises a first capacitor connected across the plurality of first bridge arms, and the first capacitor is connected across the plurality of first bridge arms.

[0022] A discharging system comprising a power battery and the motor control circuit in the above embodiments;

[0023] The positive electrode of the power battery is connected with the first switch and the second switch;

[0024] The negative electrode of the power battery is connected with the second end of the plurality of first bridge arms and the second end of the DC charging port.

[0025] A discharging system comprising a power battery, a generator and the motor control circuit in the above embodiments;

[0026] The positive electrode of the power battery is connected with the first switch and the second switch; the negative electrode of the power battery is connected with the second end of the plurality of first bridge arms, the second end of the plurality of second bridge arms and the second end of the DC charging port;

[0027] The generator is connected with the midpoint of the plurality of second bridge arms.

[0028] Preferably, the discharging system further comprises a second capacitor and a third capacitor;

[0029] The two ends of the second capacitor are respectively connected with the two ends of the power battery;

[0030] The two ends of the third capacitor are respectively connected with the two ends of the DC charging port.

[0031] A vehicle control system comprising the above discharging system and a control device connected with the discharging system for controlling the operation of the discharging system.

[0032] A vehicle comprising the above vehicle control system.

[0033] The motor controller, the motor control circuit, the discharging system, the control system and the vehicle, the motor controller multiplexes the plurality of first bridge arms connected with the motor, further comprises a first inductor and / or a second inductor, when the motor controller is connected with the power battery and the power load through the switch, the motor controller can be controlled to work according to the actual situation, so that the power battery can charge the power load directly, step up or step down, so that the power battery can realize multiple discharging functions, and the whole circuit structure multiplexes the first bridge arm, different discharging functions can be realized by adding inductors and switches, the whole circuit structure is simple, small in size and low in cost, and can meet different discharging requirements. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings described in the following description only represent some embodiments of the present application, and all other drawings obtained by those skilled in the art without creative labor on the premise of the drawings can also belong to the protection scope of the present application.

[0035] Figure 1 is a first circuit schematic diagram of a discharge system in an embodiment of the present application;

[0036] Figure 2 is a first application state diagram of the discharge system in the embodiment of the present application;

[0037] Figure 3 is a second circuit schematic diagram of the discharge system in the embodiment of the present application;

[0038] Figure 4 is a second application state diagram of the discharge system in the embodiment of the present application;

[0039] Figure 5 is a third circuit schematic diagram of the discharge system in the embodiment of the present application;

[0040] Figure 6 is a third application state diagram of the discharge system in the embodiment of the present application;

[0041] Figure 7 is a first flow chart of a control method of the discharge system in the embodiment of the present application;

[0042] Figure 8 is a second flow chart of the control method of the discharge system in the embodiment of the present application. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor on the premise of the present application all belong to the protection scope of the present application.

[0044] It should be understood that the present application can be implemented in different forms, and should not be interpreted as being limited to the embodiments presented here. On the contrary, the presentation of these embodiments will make the disclosure complete and complete, and will fully convey the scope of the present application to those skilled in the art. In the drawings, in order to be clear, the size and relative size of the layers and regions may be exaggerated throughout the same reference signs represent the same elements.

[0045] It will be understood that when an element or layer is referred to as being "on", "adjacent", "connected" or "coupled" to another element or layer, it can be directly on, adjacent, connected or coupled to the other element or layer or intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on", "directly adjacent", "directly connected", or "directly coupled" to another element or layer, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present application.

[0046] Spatially relative terms, such as "beneath", "below", "lower", "under", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0047] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0048] For a thorough understanding of the present application, reference should be made to the following detailed description, in conjunction with the accompanying drawings, in which:

[0049] The utility model embodiment provides a motor controller 1, such as Figure 1 And Figure 2 As shown in the figure, the motor controller 1 includes a plurality of first bridge arms, the midpoint of the plurality of first bridge arms is used to connect the motor, and further includes a first inductor L1 and / or a second inductor L2.

[0050] The first end of the plurality of first bridge arms is used to connect the positive pole of the power battery BAT1 through the first switch K1 and is used to connect the first end of the direct current charging port 2.

[0051] The second end of the plurality of first bridge arms is used to connect the negative pole of the power battery BAT1 and the second end of the direct current charging port 2.

[0052] The first end of the first inductor L1 is connected to the midpoint of a first bridge arm, and the second end of the first inductor L1 is used to connect the positive pole of the power battery BAT1 through the second switch K2.

[0053] The first end of the second inductor L2 is connected to the midpoint of a first bridge arm, and the second end of the second inductor L2 is used to connect the first end of the direct current charging port 2 through the third switch K3.

[0054] Among them, the motor controller 1 is a circuit for controlling the operation of the motor. The motor controller 1 includes a plurality of first bridge arms and at least one first inductor L1, and the first bridge arm includes the upper bridge switch tube S1 and the lower bridge switch tube S2 arranged in series, and the connection node between the upper bridge switch tube S1 and the lower bridge switch tube S2 is the midpoint of the first bridge arm. The direct current charging port 2 is a charging port that charges in a direct current charging mode, and is generally a fast charging port on a car.

[0055] As an example, the first end of the plurality of first bridge arms is used to connect the positive pole of the power battery BAT1 and the first end of the direct current charging port 2 through the first switch K1, that is, the upper bridge switch tube S1 of the plurality of first bridge arms is connected to the positive pole of the power battery BAT1 and the first end of the direct current charging port 2 through the first switch K1; the second end of the plurality of first bridge arms is used to connect the negative pole of the power battery BAT1 and the second end of the direct current charging port 2, that is, the lower bridge switch tube S2 of the plurality of first bridge arms is connected to the negative pole of the power battery BAT1 and the second end of the direct current charging port 2. In this example, the midpoint of each first bridge arm is used to connect the winding coil of the motor to drive the motor to work.

[0056] In the example, the motor controller 1 can be provided with only the first inductor L1, a first end of the first inductor L1 being connected to the midpoint of a first bridge arm, and a second end of the first inductor L1 being connected to the positive pole of the power battery BAT1 through the second switch K2, so that the power battery BAT1 and the motor controller 1 cooperate to boost charge the electrical load. Alternatively, the motor controller 1 can be provided with only the second inductor L2, one end of the second inductor L2 being connected to the midpoint of a first bridge arm, and the second end of the second inductor L2 being connected to the first end of the DC charging port 2 through the third switch K3, so that the power battery BAT1 and the motor controller 1 cooperate to step-down charge the electrical load. Alternatively, the first inductor L1 and the second inductor L2 can be provided at the same time, so that the power battery BAT1 and the motor controller 1 cooperate to select boost charging or step-down charging according to the actual situation. In the example, the number of the first inductor L1 can be one or multiple, which can be determined according to the actual situation, and the more the number is, the higher the power of the boost control can be achieved.

[0057] In the example, the first switch K1 and the second switch K2 can be controlled to work, so that the motor controller 1 realizes different functions:

[0058] When the DC charging port 2 is not connected to the electrical load, the first switch K1 is controlled to be turned on, the second switch K2 is controlled to be turned off, and the third switch K3 is controlled to be turned off, so that the power battery BAT1 is connected to the multiple winding coils through the multiple first bridge arms, thereby driving the motor to work.

[0059] When the DC charging port 2 is connected to the electrical load, the first switch K1 is controlled to be turned on, the second switch K2 is controlled to be turned off, and the third switch K3 is controlled to be turned off, so that the power battery BAT1 is connected to the electrical load through the DC charging port 2, thereby realizing the direct charging function.

[0060] When the DC charging port 2 is connected with the electric load, the first switch K1 is controlled to be off, the second switch K2 is controlled to be on, and the third switch K3 is controlled to be off, so that the power battery BAT1 is connected with the electric load through the motor controller 1, and the following steps are performed: (1) the lower bridge switch S2 connected with the first inductor L1 is controlled to be on, so that the current output from the positive pole of the power battery BAT1 flows back to the negative pole of the power battery BAT1 through the second switch K2, the first inductor L1 and the lower bridge switch S2 in sequence, so that the power battery BAT1 charges the first inductor L1; (2) the upper bridge switch S1 connected with the first inductor L1 is controlled to be on, so that the current output from the positive pole of the power battery BAT1 flows back to the negative pole of the power battery BAT1 through the second switch K2, the first inductor L1, the upper bridge switch S1 and the electric load connected with the DC charging port 2 in sequence, so that the power battery BAT1 charges the electric load, and due to the current of the first inductor L1 cannot be abruptly changed, the first inductor L1 also charges the electric load, so that the charging voltage between the DC charging port 2 is greater than the supply voltage of the power battery BAT1, thereby realizing the step-up charging function.

[0061] When the DC charging port 2 is connected with the electric load, the first switch K1 is controlled to be on, the second switch K2 is controlled to be off, and the third switch K3 is controlled to be on, so that the power battery BAT1 is connected with the electric load through the motor controller 1, and the following steps are performed: (1) the upper bridge switch S1 connected with the second inductor L2 is controlled to be on, so that the current output from the positive pole of the power battery BAT1 flows back to the negative pole of the power battery BAT1 through the first switch K1, the upper bridge switch S1, the second inductor L2, the third switch K3 and the electric load connected with the DC charging port 2 in sequence, and due to the second inductor L2 and the electric load being connected in series, the charging voltage between the electric load is less than the supply voltage of the power battery BAT1, thereby realizing the step-down charging function of the electric load; (2) the lower bridge switch S2 connected with the second inductor L2 is controlled to be on, and due to the current of the second inductor L2 cannot be abruptly changed, the current of the second inductor L2 flows back through the electric load and the lower bridge switch S2 in sequence, so as to cooperate with the power battery BAT1 to complete the step-down charging function of the electric load.

[0062] In the example, the motor controller 1 multiplexes the plurality of first bridge arms connected with the motor, and further includes the first inductor L1 and / or the second inductor L2, when the motor controller 1 is connected with the power battery BAT1 and the electric load through the switches, the motor controller 1 can be controlled to work according to the actual situation, so that the power battery BAT1 can charge the electric load in a direct connection mode, a step-up charging mode or a step-down charging mode, so that the power battery BAT1 can realize a plurality of discharging functions, and the entire circuit structure multiplexes the first bridge arms, and different discharging functions can be switched by adding inductors and switches, so that the entire circuit structure is simple, small in size and low in cost, and can meet different discharging requirements.

[0063] The motor control circuit comprises the motor controller 1 and the first switch K1 in the above embodiment, and further comprises a second switch K2 and / or a third switch K3. Figure 1 and Figure 2 The motor control circuit comprises the motor controller 1 and the first switch K1 in the above embodiment, and further comprises a second switch K2 and / or a third switch K3.

[0064] The first switch K1 is arranged between the positive electrode of the power battery BAT1 and the first end of the direct current charging port 2.

[0065] The first ends of the plurality of first bridge arms are connected with a connection node between the first switch K1 and the first end of the direct current charging port 2, and the second ends of the plurality of first bridge arms are connected with the negative electrode of the power battery BAT1 and the second end of the direct current charging port 2.

[0066] The first end of the second switch K2 is connected with the second end of the first inductor L1, and the second end of the second switch K2 is used for connecting the positive electrode of the power battery BAT1.

[0067] The first end of the third switch K3 is connected with the second end of the second inductor L2, and the second end of the third switch K3 is used for connecting the first end of the direct current charging port 2.

[0068] As an example, the motor control circuit comprises the motor controller 1, the first switch K1 in the above embodiment, and further comprises the second switch K2 and / or the third switch K3; the first switch K1 is arranged between the positive electrode of the power battery BAT1 and the first end of the direct current charging port 2, so that the power battery BAT1 can directly charge the power load; the first ends of the plurality of first bridge arms are connected with a connection node between the first switch K1 and the first end of the direct current charging port 2, the second switch K2 is arranged between the first inductor L1 and the positive electrode of the power battery BAT1, the third switch K3 is arranged between the second inductor L2 and the first end of the direct current charging port 2, and the second ends of the plurality of first bridge arms are connected with the negative electrode of the power battery BAT1 and the second end of the direct current charging port 2.

[0069] When the motor control circuit is connected with the power battery BAT1 and the power load, the power battery BAT1 has the ability of discharging to the outside and charging the power load by controlling the first switch K1, the second switch K2, the third switch K3 and the first bridge arm, and the specific control process is as follows:

[0070] In the first discharging mode, the first switch K1 is controlled to be turned on, the second switch K2 is controlled to be turned off, and the third switch K3 is controlled to be turned off, so that the power battery BAT1 directly charges the power load to realize the direct charging function.

[0071] The second discharging mode is to control the first switch K1 to be off, the second switch K2 to be on, and the third switch K3 to be off, and to control the lower bridge switch S2 and the upper bridge switch S1 in the first bridge arm connected with the first inductor L1 to be on in an interleaving manner, so that the power battery BAT1 can boost charge the power load, and the power battery BAT1 can normally charge the power load when the power battery BAT1 has a low power or a voltage lower than that of the power load, so as to guarantee the discharging capability of the power battery BAT1.

[0072] The third discharging mode is to control the first switch K1 to be on, the second switch K2 to be off, and the third switch K3 to be on, and to control the upper bridge switch S1 and the lower bridge switch S2 in the first bridge arm connected with the second inductor L2 to be on in an interleaving manner, so that the power battery BAT1 can step-down charge the power load, and the power battery BAT1 can normally charge the power load when the power battery BAT1 has a voltage higher than that of the power load, so as to guarantee the discharging capability of the power battery BAT1.

[0073] In an embodiment, the motor control circuit further comprises a first capacitor C1 connected across the plurality of first bridge arms.

[0074] As an example, the motor control circuit further comprises a first capacitor C1 connected across the plurality of first bridge arms, for stabilizing the voltage across the plurality of first bridge arms to avoid voltage fluctuation in the working process of the plurality of first bridge arms.

[0075] Embodiments of the utility model provide a motor control circuit, such as Figure 3 and Figure 4 As shown in the drawings, the motor control circuit comprises a first motor controller 11, a second motor controller 12 and a first switch K1, and further comprises a second switch K2 and / or a third switch K3.

[0076] The first switch K1 is arranged between the positive electrode of the power battery BAT1 and the first end of the direct current charging port 2.

[0077] The first motor controller 11 is the motor controller 1 in the above embodiment; the first ends of the plurality of first bridge arms are connected with the connection node between the first switch K1 and the first end of the direct current charging port 2, and the second ends of the plurality of first bridge arms are connected with the negative electrode of the power battery BAT1 and the second end of the direct current charging port 2; the first end of the second switch K2 is connected with the second end of the first inductor L1, and the second end of the second switch K2 is used for connecting the positive electrode of the power battery BAT1; the first end of the third switch K3 is connected with the second end of the second inductor L2, and the second end of the third switch K3 is used for connecting the first end of the direct current charging port 2.

[0078] The second motor controller 12 comprises a plurality of second bridge arms, the midpoints of the plurality of second bridge arms being used for connecting the generator; the first ends of the plurality of second bridge arms being connected to a connection node between the positive pole of the power battery BAT1 and the first switch K1, and the second ends of the plurality of second bridge arms being connected to the negative pole of the power battery BAT1 and the second end of the DC charging port 2.

[0079] As an example, the motor control circuit comprises the first motor controller 11, the second motor controller 12, and the first switch K1, and further comprises a second switch K2 and / or a third switch K3; the first switch K1 is arranged between the positive pole of the power battery BAT1 and the first end of the DC charging port 2.

[0080] The first motor controller 11 is the motor controller 1 in the above-mentioned embodiments, and specifically comprises a plurality of first bridge arms, and further comprises a first inductor L1 and / or a second inductor L2; the first ends of the plurality of first bridge arms are connected to a connection node between the first switch K1 and the first end of the DC charging port 2, and the second ends of the plurality of first bridge arms are connected to the negative pole of the power battery BAT1 and the second end of the DC charging port 2; the first end of the second switch K2 is connected to the second end of the first inductor L1, and the second end of the second switch K2 is used for connecting the positive pole of the power battery BAT1; the first end of the third switch K3 is connected to the second end of the second inductor L2, and the second end of the third switch K3 is used for connecting the first end of the DC charging port 2, so that the power battery BAT1 cooperates with the first motor controller 11 to enable the direct charging, the step-up charging or the step-down charging of the power load connected to the DC charging port 2.

[0081] The second motor controller 12 comprises a plurality of second bridge arms, the midpoints of the plurality of second bridge arms being used for connecting the generator, the first ends of the second bridge arms being connected to the positive pole of the power battery BAT1 and the first switch K1, and the second ends of the second bridge arms being connected to the negative pole of the power battery BAT1 and the second end of the DC charging port 2; when the first switch K1 is turned on, the generator and the second motor controller 12 are controlled to work, so that the generator and the power battery BAT1 together charge the power load connected to the DC charging port 2, so that the discharging capacity of the power battery BAT1 can still meet the demand of the power load when the power battery BAT1 is in a low power state.

[0082] In an embodiment, as shown in Figure 5 and Figure 6 The motor control circuit further comprises a fourth switch K4.

[0083] One end of the fourth switch K4 is connected to the positive pole of the power battery BAT1, and the other end of the fourth switch K4 is connected to the first ends of the plurality of second bridge arms and the first switch K1.

[0084] As an example, the motor control circuit further comprises a fourth switch K4 arranged between the power battery BAT1 and the second motor controller 12, that is, a first end of the fourth switch K4 is connected with a positive electrode of the power battery BAT1, and a second end of the fourth switch K4 is connected with a first end of the plurality of second bridge arms and the first switch K1; when the power battery BAT1 has a low power, the first switch K1 and the fourth switch K4 are controlled to be turned on, and the second switch K2 and the third switch K3 are controlled to be turned off, so that the generator and the power battery BAT1 together charge the power load connected with the DC charging port 2, to ensure the charging efficiency of the power load; when the power battery BAT1 has an extremely low power, the first switch K1 is controlled to be turned on, and the second switch K2, the third switch K3 and the fourth switch K4 are controlled to be turned off, so that only the generator generates electricity to charge the power load of the DC charging port 2, to avoid that the low power of the power battery BAT1 affects the normal work of the power battery BAT1.

[0085] In an embodiment, the motor control circuit further comprises a first capacitor C1, two ends of the first capacitor C1 are connected with two ends of the plurality of first bridge arms, and two ends of the first capacitor are connected with two ends of the plurality of second bridge arms.

[0086] As an example, the motor control circuit further comprises a first capacitor, two ends of the first capacitor C1 are connected with two ends of the plurality of first bridge arms, for stabilizing the voltage at two ends of the plurality of first bridge arms, to avoid voltage fluctuation in the working process of the plurality of first bridge arms; and the first capacitor C1 is further connected with two ends of the plurality of second bridge arms, for stabilizing the voltage at two ends of the plurality of second bridge arms, to avoid voltage fluctuation in the working process of the plurality of second bridge arms.

[0087] The embodiment of the utility model provides a kind of discharge system, such as Figure 1 And Figure 2 As shown, comprising power battery BAT1 and the motor control circuit 1 in above-mentioned embodiment;

[0088] The positive electrode of the power battery BAT1 is connected with the first switch K1 and the second switch K2;

[0089] The negative electrode of the power battery BAT1 is connected with the second end of the plurality of first bridge arms and the second end of the DC charging port 2.

[0090] As an example, the discharging system comprises the power battery BAT1 and the motor control circuit in the embodiment 2, the positive pole of the power battery BAT1 is connected with the first end of the plurality of first bridge arms and the first end of the direct current charging port 2 through the first switch K1, and is connected with the midpoint of the first bridge arm through the second switch K2 and the first inductor L1, the negative pole of the power battery BAT1 is connected with the second end of the plurality of first bridge arms and the second end of the direct current charging port 2, and the power battery BAT1 can have the discharging capacity to the external through controlling the first switch K1, the second switch K2, the third switch K3 and the first bridge arm, and the power battery BAT1 can charge the electric load, and the specific control process is as follows:

[0091] The first discharging mode, when the first switch K1 is turned on, the second switch K2 is turned off and the third switch K3 is turned off, the power battery BAT1 can be directly connected with the direct current charging port 2 to charge the electric load.

[0092] The second discharging mode, when the first switch K1 is turned off, the second switch K2 is turned on and the third switch K3 is turned off, the power battery BAT1 is connected with the direct current charging port 2 through the motor controller 1 to charge the electric load, that is, the lower bridge switch S2 connected with the first inductor L1 is controlled to be turned on, so that the power battery BAT1 charges the first inductor L1, and then the upper bridge switch S1 connected with the first inductor L1 is controlled to be turned on, so that the power battery BAT1 and the first inductor L1 charge the electric load, so that the charging voltage between the two ends of the direct current charging port 2 is greater than the power supply voltage of the power battery BAT1, thereby realizing the step-up charging function.

[0093] The third discharging mode, when the first switch K1 is turned on, the second switch K2 is turned off and the third switch K3 is turned on, the power battery BAT1 is connected with the direct current charging port 2 through the motor controller 1 to charge the electric load, that is, the upper bridge switch S1 connected with the second inductor L2 is controlled to be turned on, so that the power battery BAT1 charges the second inductor L2 and the electric load, because the second inductor L2 and the electric load are connected in series, so that the charging voltage between the two ends of the electric load is less than the power supply voltage of the power battery BAT1, thereby realizing the step-down charging function of the electric load, and because the current of the second inductor L2 cannot be suddenly changed, the lower bridge switch S2 connected with the second inductor L2 is controlled to be turned on, so that the current of the second inductor L2 sequentially passes through the electric load and the lower bridge switch S2 to form a loop, so as to cooperate with the power battery BAT1 to complete the step-down charging function of the electric load.

[0094] The embodiment of the utility model provides a kind of discharging system, as shown in Figure 3 And Figure 4 It is shown that it comprises power battery BAT1, generator and the motor control circuit in the above embodiment;

[0095] The positive pole of the power battery BAT1 is connected with the first switch K1 and the second switch K2; the negative pole of the power battery BAT1 is connected with the second ends of the plurality of first bridge arms, the second ends of the plurality of second bridge arms and the second end of the direct current charging port 2;

[0096] The generator is connected with the midpoints of the plurality of second bridge arms.

[0097] As an example, the discharging system comprises the power battery BAT1, the generator and the motor control circuit in the embodiment 3, the motor control circuit comprises the first motor controller 11, the second motor controller 12 and the first switch K1, and further comprises the second switch K2 and / or the third switch K3; the first switch K1 is arranged between the positive pole of the power battery BAT1 and the first end of the direct current charging port 2.

[0098] The first motor controller 11 is the motor control circuit in the above-mentioned embodiments, and specifically comprises the plurality of first bridge arms, further comprises the first inductor L1 and / or the second inductor L2, the first ends of the plurality of first bridge arms are connected with the connection node between the first switch K1 and the first end of the direct current charging port 2, the second ends of the plurality of first bridge arms are connected with the negative pole of the power battery BAT1 and the second end of the direct current charging port 2; the first end of the second switch K2 is connected with the second end of the first inductor L1, the second end of the second switch K2 is used for connecting the positive pole of the power battery BAT1; the first end of the third switch K3 is connected with the second end of the second inductor L2, the second end of the third switch K3 is used for connecting the first end of the direct current charging port 2, so that the power battery BAT1 cooperates with the first motor controller 11 to charge the electric load connected with the direct current charging port 2 in a direct connection mode, a step-up mode or a step-down mode.

[0099] The second motor controller 12 comprises the plurality of second bridge arms, the midpoints of the plurality of second bridge arms are used for connecting the generator, the first ends of the second bridge arms are connected with the positive pole of the power battery BAT1 and the first switch K1, the second ends of the second bridge arms are connected with the negative pole of the power battery BAT1 and the second end of the direct current charging port 2; when the first switch K1 is turned on, the generator and the second motor controller 12 are controlled to work, so that the generator charges the electric load connected with the direct current charging port 2 together with the power battery BAT1, so that the discharging capacity of the power battery BAT1 can still meet the demand of the electric load when the power battery BAT1 is in a low power state.

[0100] In an embodiment, as shown in FIG. 2, the discharging system further comprises the second capacitor C2 and the third capacitor C3; Figures 1-6

[0101] The two ends of the second capacitor C2 are respectively connected with the two ends of the power battery BAT1;

[0102] The two ends of the third capacitor C3 are respectively connected with the two ends of the direct current charging port 2.

[0103] ​As an example, the discharging system further comprises a second capacitor C2 and a third capacitor C3, the second capacitor C2 is connected across the power battery BAT1, and is used for voltage stabilization processing on the voltage across the power battery BAT1 to prevent voltage fluctuation; the third capacitor C3 is connected across the DC charging port 2, and is used for voltage stabilization processing on the voltage across the DC charging port 2 to prevent voltage fluctuation.

[0104] As shown in Figure 2 , Figure 4 and Figure 6 , the automobile equipped with the discharging system is a discharging vehicle, and the electric load connected to the DC charging port 2 of the discharging vehicle is a charging vehicle, and the direct charging port of the charging vehicle is connected to the DC charging port 2 of the discharging vehicle, so that the power battery BAT1 of the discharging vehicle can charge the power battery BAT2 of the charging vehicle, and the electric energy of the discharging vehicle is supplemented to the charging vehicle, thereby improving the user experience of the hybrid vehicle, and the scheme has low cost, high convenience, and stability and reliability.

[0105] The embodiment of the utility model provides a kind of control method of discharging system, and discharging system is Figure 1 and Figure 2 As shown, discharging system, specifically applicable in control device (including but not limited to BMS) connected with discharging system, control method includes:

[0106] S11: obtain first measured data, determine target discharging condition based on first measured data;

[0107] S12: when target discharging condition is direct connection discharging condition, control first switch to turn on, second switch to turn off, third switch to turn off, so that power battery is directly connected to the electric load connected to the DC charging port and charges;

[0108] S13: when target discharging condition is boost discharging condition, control first switch to turn off, second switch to turn on, third switch to turn off, stagger control lower bridge switch tube and upper bridge switch tube connected with first inductor to turn on, so that power battery is connected to the electric load connected to the DC charging port and is boosted and charged;

[0109] S14: when target discharging condition is buck discharging condition, control first switch to turn on, second switch to turn off, third switch to turn on, stagger control upper bridge switch tube and lower bridge switch tube connected with second inductor to turn on, so that power battery is connected to the electric load connected to the DC charging port and is bucked and charged.

[0110] Among them, first measured data is the data for reflecting the discharging capacity of power battery BAT1 and the charging demand of electric load, which is collected in real time.Target discharging condition is the discharging condition that power battery BAT1 needs to enter according to first measured data.

[0111] As an example, in step S11, the control device can acquire the first measured data, evaluate whether the discharging capability of the power battery BAT1 matches the charging demand of the power load based on the first measured data, and further determine the target discharging condition. The target discharging condition can be any one of the direct connection discharging condition, the step-up discharging condition, and the step-down discharging condition.

[0112] As an example, in step S12, when the target discharging condition is the direct connection discharging condition, the control device can determine that the discharging capability of the power battery BAT1 matches the charging demand of the power load. At this time, the first switch K1 is turned on, the second switch K2 is turned off, and the third switch K3 is turned off, so that the power battery BAT1 can directly charge the power load without step-up or step-down processing by the motor controller 1, to realize the direct connection charging function.

[0113] As an example, in step S13, when the target discharging condition is the step-up discharging condition, the control device can determine that the discharging capability of the power battery BAT1 cannot meet the charging demand of the power load, and the supply voltage output by the power battery BAT1 needs to be stepped up to reach the working voltage required by the power load. The specific control process is as follows: the first switch K1 is turned off, the second switch K2 is turned on, the third switch K3 is turned off, and the lower bridge switch S2 and the upper bridge switch S1 connected to the first inductor L1 are controlled to be turned on alternately. In this example, the lower bridge switch S2 and the upper bridge switch S1 connected to the first inductor L1 are controlled to be turned on alternately, specifically including: controlling the lower bridge switch S2 connected to the first inductor L1 to be turned on, so that the power battery BAT1 charges the first inductor L1; and then controlling the upper bridge switch S1 connected to the first inductor L1 to be turned on, so that the power battery BAT1 and the first inductor L1 charge the power load, so that the charging voltage across the direct current charging port 2 is greater than the supply voltage of the power battery BAT1, thereby realizing the step-up charging function.

[0114] As an example, in step S14, when the target discharging working condition is the step-down discharging working condition, the control device can determine that the discharging capacity of the power battery BAT1 is much higher than the charging demand of the power consumption load, and if the power consumption load is directly charged based on the supply voltage of the power battery BAT1, the normal work of the power consumption load can be affected, at this time, the supply voltage output by the power battery BAT1 needs to be stepped down to reach the working voltage required by the power consumption load, and the specific control is as follows: the first switch K1 is controlled to be turned on, the second switch K2 is controlled to be turned off, the third switch K3 is controlled to be turned on, and the upper bridge switch tube S1 and the lower bridge switch tube S2 connected with the second inductor L2 are controlled to be turned on in an interleaving manner. In this example, the upper bridge switch tube S1 and the lower bridge switch tube S2 connected with the second inductor L2 are controlled to be turned on in an interleaving manner, which specifically includes: first, the upper bridge switch tube S1 connected with the second inductor L2 is controlled to be turned on, so that the power battery BAT1 charges the second inductor L2 and the power consumption load, and since the second inductor L2 and the power consumption load are connected in series, the charging voltage at both ends of the power consumption load is less than the supply voltage of the power battery BAT1, thereby realizing the function of step-down charging of the power consumption load; since the current of the second inductor L2 cannot be suddenly changed, the lower bridge switch tube S2 connected with the second inductor L2 needs to be controlled to be turned on again, so that the current of the second inductor L2 flows through the power consumption load and the lower bridge switch tube S2 in turn to form a loop, so as to cooperate with the power battery BAT1 to complete the function of step-down charging of the power consumption load.

[0115] In this embodiment, after the target discharging working condition is determined based on the first measured data, the first switch K1, the second switch K2, the third switch K3 and the first bridge arm are controlled to work, so that the power battery BAT1 can charge the power consumption load in a direct connection mode, a step-up charging mode or a step-down charging mode, etc., to meet different discharging demands and realize the demand of the external discharging scene in all working conditions.

[0116] In an embodiment, the first measured data includes the current SOC of the power battery BAT1, the supply voltage of the power battery BAT1 and the demand voltage of the power consumption load.

[0117] Step S11, i.e., determining the target discharging working condition based on the first measured data, includes:

[0118] S111: if the current SOC is less than the preset SOC threshold, the target discharging working condition is determined to be the step-up discharging working condition;

[0119] S111: if the current SOC is not less than the preset SOC threshold, the target discharging working condition is determined based on the supply voltage of the power battery BAT1 and the demand voltage of the power consumption load.

[0120] The current SOC of the power battery BAT1 is the SOC detected by the power battery BAT1 at the current time. The supply voltage of the power battery BAT1 is the voltage discharged by the power battery BAT1 to the outside, which is the working voltage of the power battery BAT1. The demand voltage of the power load is the charging voltage required by the power load, which is the working voltage of the power load. The preset SOC threshold is a threshold preset for evaluating whether the battery power reaches a lower standard, specifically, a threshold for evaluating whether to directly boost discharge.

[0121] As an example, the control device can obtain the current SOC of the power battery BAT1, the supply voltage of the power battery BAT1, and the demand voltage of the power load, and other first measured data through sensing devices or communication methods, and compare the current SOC with the preset SOC threshold first. When the current SOC is less than the preset SOC threshold, it is determined that the power of the power battery is low, and it is determined that the discharge power that can be provided is small, and the corresponding supply voltage will also be low. Therefore, the target discharge working condition can be directly determined as a boost discharge working condition, so as to reuse the motor controller 1 to boost the supply voltage of the power battery, so as to ensure that the charging voltage provided to the power load meets the charging demand thereof. When the current SOC is not less than the preset SOC threshold, it is determined that the discharge power that can be provided is large, and at this time, the supply voltage of the power battery BAT1 and the demand voltage of the power load need to be compared to determine the target discharge working condition according to the comparison result.

[0122] In an embodiment, the step S111, i.e., determining the target discharge working condition based on the supply voltage of the power battery BAT1 and the demand voltage of the power load, comprises:

[0123] If the absolute value of the voltage difference between the supply voltage and the demand voltage is less than the preset voltage difference threshold, it is determined that the target discharge working condition is a direct connection discharge working condition.

[0124] If the absolute value of the voltage difference between the supply voltage and the demand voltage is not less than the preset voltage difference threshold, and the supply voltage is less than the demand voltage, it is determined that the target discharge working condition is a boost discharge working condition.

[0125] If the absolute value of the voltage difference between the supply voltage and the demand voltage is not less than the preset voltage difference threshold, and the supply voltage is greater than the demand voltage, it is determined that the target discharge working condition is a step-down discharge working condition.

[0126] The preset voltage difference threshold is a threshold preset for evaluating whether the voltage difference reaches a larger standard.

[0127] As an example, the control device can first determine the absolute value of the voltage difference between the supply voltage of the power battery BAT1 and the demand voltage of the power load after acquiring the supply voltage of the power battery BAT1 and the demand voltage of the power load; then compare the absolute value of the voltage difference with the preset voltage difference threshold; if the absolute value of the voltage difference is less than the preset voltage difference threshold, it is determined that the supply voltage of the power battery BAT1 and the demand voltage of the power load are relatively small, and the power battery BAT1 can provide the demand voltage required for the power load to work normally, so the target discharge condition can be determined as the direct discharge condition; if the absolute value of the voltage difference between the supply voltage and the demand voltage is not less than the preset voltage difference threshold, and the supply voltage is less than the demand voltage, it means that the supply voltage of the power battery BAT1 is much smaller than the demand voltage of the power load, at this time, the target discharge condition can be determined as the boost discharge condition to boost the supply voltage output by the power battery BAT1 to provide the working voltage required by the power load; if the absolute value of the voltage difference between the supply voltage and the demand voltage is not less than the preset voltage difference threshold, and the supply voltage is greater than the demand voltage, it means that the supply voltage of the power battery BAT1 is much greater than the demand voltage of the power load, and if the power load is directly powered, it will affect its normal work, at this time, the target discharge condition can be determined as the step-down discharge condition to step down the supply voltage output by the power battery BAT1 to provide the working voltage required by the power load.

[0128] The control method of the discharge system provided by the embodiments of the present application is applicable to the control device (including but not limited to BMS) connected to the discharge system. Figure 3 and Figure 4 The control method includes:

[0129] S21: acquiring second measured data, and determining the current charge condition of the power battery based on the second measured data;

[0130] S22: if the current charge condition is a high charge condition, controlling the power battery to charge the power load connected to the DC charging port;

[0131] S23: if the current charge condition is a low charge condition, controlling the power battery and the generator to charge the power load connected to the DC charging port.

[0132] The second measured data is real-time collected data for reflecting the state of charge of the power battery BAT1.

[0133] As an example, in step S21, the control device can acquire the second measured data, evaluate the state of charge of the power battery BAT1 based on the second measured data, to determine the current state of charge of the power battery BAT1, which can be a high state of charge or a low state of charge. The high state of charge refers to a state of charge of the power battery BAT1 with a higher amount of electricity. The low state of charge refers to a state of charge of the power battery BAT1 with a lower amount of electricity.

[0134] As an example, in step S22, when the current state of charge of the power battery BAT1 is a high state of charge, the control device determines that the power battery BAT1 has a higher amount of electricity, and at this time, the power battery BAT1 can be controlled to charge the electrical load connected to the DC charging port 2, so as to meet the charging demand of the electrical load and avoid affecting the normal work of the power battery BAT1 due to the decrease of the amount of electricity of the power battery BAT1 when the power battery BAT1 discharges the electrical load.

[0135] As an example, in step S23, when the current state of charge of the power battery BAT1 is a low state of charge, the control device determines that the power battery BAT1 has a lower amount of electricity, and at this time, the power battery BAT1 and the generator can be controlled to charge the electrical load connected to the DC charging port 2, so as to meet the charging demand of the electrical load and ensure the charging efficiency of the electrical load.

[0136] In an embodiment, the second measured data includes the current SOC of the power battery BAT1.

[0137] Step S21, i.e., determining the current state of charge of the power battery BAT1 based on the second measured data, includes:

[0138] S211: If the current SOC is greater than the first SOC threshold, it is determined that the current state of charge of the power battery BAT1 is a high state of charge.

[0139] S212: If the current SOC is not greater than the first SOC threshold, it is determined that the current state of charge of the power battery BAT1 is a low state of charge.

[0140] The first SOC threshold is a threshold value preset for evaluating whether the battery electricity reaches a lower standard to determine whether the generator needs to be controlled to work. The first SOC threshold can be the same as or different from the preset SOC threshold in the above embodiment.

[0141] As an example, the control device can acquire the current SOC of the power battery BAT1 through the sensing device or the communication manner, compare the current SOC with the first SOC threshold, determine that the power of the power battery BAT1 is high if the current SOC is greater than the first SOC threshold, determine that the current charging condition of the power battery BAT1 is the high charging condition, and control the power battery BAT1 to charge the electric load connected with the DC charging port 2 subsequently; or determine that the power of the power battery BAT1 is low if the current SOC is not greater than the first SOC threshold, determine that the current charging condition of the power battery BAT1 is the low charging condition, and control the power battery BAT1 and the generator to charge the electric load connected with the DC charging port 2 subsequently.

[0142] In an embodiment, the low charging condition includes a first low charging condition and a second low charging condition.

[0143] The first low charging condition is a condition that the current SOC is not greater than the first SOC threshold and the current SOC is greater than a second SOC threshold.

[0144] The second low charging condition is a condition that the current SOC is not greater than the second SOC threshold.

[0145] The second SOC threshold is a threshold for evaluating whether the power of the battery reaches an extremely low standard, and the second SOC threshold is less than the first SOC threshold.

[0146] As an example, the control device can compare the current SOC with the first SOC threshold and the second SOC threshold, determine that the current charging condition of the power battery BAT1 is the high charging condition if the current SOC is greater than the first SOC threshold, determine that the power of the power battery BAT1 reaches a low standard but does not reach an extremely low standard if the current SOC is not greater than the first SOC threshold and the current SOC is greater than the second SOC threshold, determine that the current charging condition of the power battery BAT1 is the first low charging condition at this time, and determine that the power of the power battery BAT1 reaches an extremely low standard if the current SOC is not greater than the second SOC threshold, determine that the current charging condition of the power battery BAT1 is the second low charging condition at this time.

[0147] In an embodiment, the step S22, i.e., controlling the power battery BAT1 to charge the electric load connected with the DC charging port 2, includes:

[0148] S221: determining a target discharging condition based on the supply voltage of the power battery BAT1 and the demand voltage of the electric load;

[0149] S222: when the target discharging condition is the direct connection discharging condition, controlling the first switch K1 to be turned on, the second switch K2 to be turned off, and the third switch K3 to be turned off, so that the power battery BAT1 directly charges the electric load connected with the DC charging port 2.

[0150] S223: When the target discharging condition is the step-up discharging condition, the first switch K1 is controlled to be turned off, the second switch K2 is controlled to be turned on, the third switch K3 is controlled to be turned off, and the lower bridge switch S2 and the upper bridge switch S1 connected with the first inductor L1 are controlled to be turned on in an interleaving manner, so that the power battery BAT1 charges the electric load connected with the DC charging port 2 in a step-up manner.

[0151] S224: When the target discharging condition is the step-down discharging condition, the first switch K1 is controlled to be turned on, the second switch K2 is controlled to be turned off, the third switch K3 is controlled to be turned on, and the upper bridge switch S1 and the lower bridge switch S2 connected with the second inductor L2 are controlled to be turned on in an interleaving manner, so that the power battery BAT1 charges the electric load connected with the DC charging port 2 in a step-down manner.

[0152] As an example, in step S221, when the current charging condition is the high charging condition, the control device can first determine the target discharging condition based on the supply voltage of the power battery BAT1 and the demand voltage of the electric load. The target discharging condition can be any one of the direct connection discharging condition, the step-up discharging condition, and the step-down discharging condition.

[0153] As an example, in step S222, when the target discharging condition is the direct connection discharging condition, the control device can determine that the discharging capacity of the power battery BAT1 matches the charging demand of the electric load. At this time, the first switch K1 is controlled to be turned on, the second switch K2 is controlled to be turned off, and the third switch K3 is controlled to be turned off, so that the power battery BAT1 can directly charge the electric load without step-up or step-down processing by the motor controller 1, thereby realizing the direct connection charging function.

[0154] As an example, in step S223, when the target discharging condition is the step-up discharging condition, the control device can determine that the discharging capacity of the power battery BAT1 cannot meet the charging demand of the electric load, and the supply voltage output by the power battery BAT1 needs to be stepped up to reach the working voltage required by the electric load. The specific control process is as follows: the first switch K1 is controlled to be turned off, the second switch K2 is controlled to be turned on, the third switch K3 is controlled to be turned off, and the lower bridge switch S2 and the upper bridge switch S1 connected with the first inductor L1 are controlled to be turned on in an interleaving manner. In this example, the lower bridge switch S2 and the upper bridge switch S1 connected with the first inductor L1 are controlled to be turned on in an interleaving manner, which specifically includes: the lower bridge switch S2 connected with the first inductor L1 is controlled to be turned on, so that the power battery BAT1 charges the first inductor L1; and then the upper bridge switch S1 connected with the first inductor L1 is controlled to be turned on, so that the power battery BAT1 and the first inductor L1 charge the electric load, so that the charging voltage across the DC charging port 2 is greater than the supply voltage of the power battery BAT1, thereby realizing the step-up charging function.

[0155] As an example, in step S224, when the target discharge working condition is the step-down discharge working condition, it can be determined that the discharging capability of the power battery BAT1 is much higher than the charging demand of the power consuming load, and if the power consuming load is directly charged based on the supply voltage of the power battery BAT1, the normal work of the power consuming load can be affected, at this time, the supply voltage output by the power battery BAT1 needs to be stepped down to reach the working voltage required by the power consuming load, and the specific control is as follows: the first switch K1 is controlled to be turned on, the second switch K2 is controlled to be turned off, the third switch K3 is controlled to be turned on, and the upper bridge switch S1 and the lower bridge switch S2 connected with the second inductor L2 are controlled to be turned on in an interleaving manner. In this example, the upper bridge switch S1 and the lower bridge switch S2 connected with the second inductor L2 are controlled to be turned on in an interleaving manner, which specifically includes: first, the upper bridge switch S1 connected with the second inductor L2 is controlled to be turned on, so that the power battery BAT1 charges the second inductor L2 and the power consuming load, and since the second inductor L2 and the power consuming load are connected in series, the charging voltage at both ends of the power consuming load is less than the supply voltage of the power battery BAT1, thereby realizing the function of step-down charging of the power consuming load; since the current of the second inductor L2 cannot be abruptly changed, the lower bridge switch S2 connected with the second inductor L2 is controlled to be turned on again, so that the current of the second inductor L2 sequentially passes through the power consuming load and the lower bridge switch S2 to form a loop, so as to cooperate with the power battery BAT1 to complete the step-down charging function of the power consuming load.

[0156] In this embodiment, when the current state of charge of the target battery is the high state of charge, the target discharge working condition is determined based on the supply voltage of the power battery BAT1 and the demand voltage of the power consuming load, and then the first switch K1, the second switch K2, the third switch K3 and the first bridge arm are controlled to work based on the target discharge working condition, so that the power battery BAT1 can perform direct connection charging, step-up charging or step-down charging on the power consuming load, so as to meet different discharging demands and realize the demand of the external discharging scene covering all working conditions.

[0157] In an embodiment, step S221, i.e., determining the target discharge working condition based on the supply voltage of the power battery BAT1 and the demand voltage of the power consuming load, includes:

[0158] S2211: if the absolute value of the voltage difference between the supply voltage and the demand voltage is less than a preset voltage difference threshold, it is determined that the target discharge working condition is the direct connection discharge working condition;

[0159] S2212: if the absolute value of the voltage difference between the supply voltage and the demand voltage is not less than the preset voltage difference threshold, and the supply voltage is less than the demand voltage, it is determined that the target discharge working condition is the step-up discharge working condition;

[0160] S2213: if the absolute value of the voltage difference between the supply voltage and the demand voltage is not less than the preset voltage difference threshold, and the supply voltage is greater than the demand voltage, it is determined that the target discharge working condition is the step-down discharge working condition.

[0161] wherein, the preset pressure difference threshold is a threshold value preset for evaluating whether the pressure difference reaches a large standard.

[0162] As an example, after obtaining the supply voltage of the power battery BAT1 and the demand voltage of the power load, the control device can first determine the absolute value of the pressure difference according to the supply voltage and the demand voltage; then compare the absolute value of the pressure difference with the preset pressure difference threshold; if the absolute value of the pressure difference is less than the preset pressure difference threshold, it is determined that the supply voltage of the power battery BAT1 and the demand voltage of the power load are less different, and the power battery BAT1 can provide the demand voltage for the power load to work normally, so the target discharge condition can be determined as the direct connection discharge condition; if the absolute value of the pressure difference of the supply voltage and the demand voltage is not less than the preset pressure difference threshold, and the supply voltage is less than the demand voltage, it indicates that the supply voltage of the power battery BAT1 is much less than the demand voltage of the power load, at this time, the target discharge condition can be determined as the boost discharge condition to boost the supply voltage output by the power battery BAT1 to provide the working voltage meeting the demand of the power load; if the absolute value of the pressure difference of the supply voltage and the demand voltage is not less than the preset pressure difference threshold, and the supply voltage is greater than the demand voltage, it indicates that the supply voltage of the power battery BAT1 is much greater than the demand voltage of the power load, and if the power load is directly supplied with power, it will affect its normal work, at this time, the target discharge condition can be determined as the step-down discharge condition to step down the supply voltage output by the power battery BAT1 to provide the working voltage meeting the demand of the power load.

[0163] In an embodiment, the step S23, i.e., controlling the power battery BAT1 and the generator to charge the power load connected with the direct current charging port 2, comprises:

[0164] controlling the first switch K1 to be conductive, the second switch K2 to be disconnected, and the third switch K3 to be disconnected, so as to make the power battery BAT1 and the generator charge the power load connected with the direct current charging port 2.

[0165] As an example, when the current charge condition is the low charge condition, and it is determined that the power of the power battery BAT1 cannot meet the charging demand of the power load, the control device can control the first switch K1 to be conductive, the second switch K2 to be disconnected, and the third switch K3 to be disconnected, control the generator and the second motor controller 12 to work, so as to make the power battery BAT1 and the generator charge the power load connected with the direct current charging port 2, and when the power battery BAT1 is in a low power state, its discharge capacity can still meet the demand of the power load.

[0166] In an embodiment, as Figure 5 and Figure 6As shown, the motor control circuit further comprises a fourth switch K4, one end of the fourth switch K4 is connected with the positive pole of the power battery BAT1, and the other end of the fourth switch K4 is connected with the first end of the plurality of second bridge arms and the first switch K1.

[0167] The control device controls the power battery BAT1 and the generator to charge the electric load connected with the DC charging port 2, and the control device comprises the following steps:

[0168] If the current charge condition is the first low charge condition, the first switch K1 and the fourth switch K4 are controlled to be turned on, and the second switch K2 and the third switch K3 are controlled to be turned off, so that the power battery BAT1 and the generator charge the electric load connected with the DC charging port 2.

[0169] If the current charge condition is the second low charge condition, the first switch K1 is controlled to be turned on, and the second switch K2, the third switch K3 and the fourth switch K4 are controlled to be turned off, so that the generator charges the electric load connected with the DC charging port 2.

[0170] In the example, the discharging system further comprises a fourth switch K4 arranged between the power battery BAT1 and the second motor controller 12, that is, the first end of the fourth switch K4 is connected with the positive pole of the power battery BAT1, and the second end of the fourth switch K4 is connected with the first end of the plurality of second bridge arms and the first switch K1.

[0171] As an example, when the power of the power battery BAT1 is low, the first switch K1 is controlled to be turned on, and the fourth switch K4 is controlled to be turned on, so that the generator and the power battery BAT1 together charge the electric load connected with the DC charging port 2, to guarantee the charging efficiency of the electric load.

[0172] As an example, when the power of the power battery BAT1 is extremely low, the first switch K1 is controlled to be turned on, and the fourth switch K4 is controlled to be turned off, so that only the generator generates electricity to charge the electric load connected with the DC charging port 2, to avoid that the low power of the power battery BAT1 affects the normal work of the power battery BAT1.

[0173] The embodiment of the utility model provides a control device, including memory, processor and computer program stored on memory and can run on processor, when processor executes computer program, realize the control method of above -mentioned discharging system in above -mentioned embodiment, to avoid repetition, here no longer repeat.

[0174] The embodiment of the utility model provides a control system, including above -mentioned discharging system and above -mentioned control device, control device is connected with discharging system, for controlling discharging system works.

[0175] The embodiment of the utility model provides an automobile, including above -mentioned control system.

[0176] The above examples are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features therein can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. An electric machine controller comprising a plurality of first bridge arms, midpoints of a plurality of the first bridge arms being for connection to an electric machine, characterized in that, The first inductor and / or the second inductor are further included; The first ends of the plurality of first bridge arms are configured to be connected to a positive pole of the power battery through the first switch and to a first end of the DC charging port; The second ends of the plurality of first bridge arms are configured to be connected to a negative pole of the power battery and a second end of the DC charging port; The first end of the first inductor is connected to a midpoint of one of the first bridge arms, and the second end of the first inductor is configured to be connected to the positive pole of the power battery through the second switch; The first end of the second inductor is connected to a midpoint of one of the first bridge arms, and the second end of the second inductor is configured to be connected to the first end of the DC charging port through the third switch.

2. An electric motor control circuit, characterized by The motor controller in claim 1 and the first switch are further included, and the second switch and / or the third switch are further included; The first switch is arranged between the positive pole of the power battery and the first end of the DC charging port; The first ends of the plurality of first bridge arms are connected to a connection node between the first switch and the first end of the DC charging port, and the second ends of the plurality of first bridge arms are connected to the negative pole of the power battery and the second end of the DC charging port; The first end of the second switch is connected to the second end of the first inductor, and the second end of the second switch is configured to be connected to the positive pole of the power battery; The first end of the third switch is connected to the second end of the second inductor, and the second end of the third switch is configured to be connected to the first end of the DC charging port.

3. The motor control circuit of claim 2, wherein, The motor control circuit further includes a first capacitor, and the first capacitor is connected to both ends of the plurality of first bridge arms.

4. An electric motor control circuit, characterized by The first motor controller, the second motor controller and the first switch are included, and the second switch and / or the third switch are further included; The first switch is arranged between the positive pole of the power battery and the first end of the DC charging port; The first motor controller is the motor controller in claim 1; the first ends of the plurality of first bridge arms are connected to a connection node between the first switch and the first end of the DC charging port, and the second ends of the plurality of first bridge arms are connected to the negative pole of the power battery and the second end of the DC charging port; the first end of the second switch is connected to the second end of the first inductor, and the second end of the second switch is configured to be connected to the positive pole of the power battery; the first end of the third switch is connected to the second end of the second inductor, and the second end of the third switch is configured to be connected to the first end of the DC charging port; The second motor controller includes a plurality of second bridge arms, and midpoints of the plurality of second bridge arms are configured to be connected to the generator; first ends of the plurality of second bridge arms are connected to a connection node between the positive pole of the power battery and the first switch, and second ends of the plurality of second bridge arms are connected to the negative pole of the power battery and the second end of the DC charging port.

5. The motor control circuit of claim 4, wherein, The motor control circuit further includes a fourth switch; One end of the fourth switch is connected to the positive pole of the power battery, and the other end of the fourth switch is connected to the first ends of the plurality of second bridge arms and the first switch.

6. The motor control circuit of claim 4, wherein, The motor control circuit further includes a first capacitor, and both ends of the first capacitor are connected to both ends of the plurality of first bridge arms.

7. A discharge system characterized by, The power battery and the motor control circuit according to any one of claims 2-3; The positive pole of the power battery is connected with the first switch and the second switch; The negative pole of the power battery is connected with the second end of the first bridge arm and the second end of the DC charging port.

8. A discharge system characterized by, The power battery, the generator and the motor control circuit according to any one of claims 4-6; The positive pole of the power battery is connected with the first switch and the second switch; the negative pole of the power battery is connected with the second end of the first bridge arm, the second end of the second bridge arm and the second end of the DC charging port; The generator is connected with the midpoint of the second bridge arm.

9. The electrical discharge system of claim 7 or 8, wherein, The discharging system further comprises a second capacitor and a third capacitor; The two ends of the second capacitor are connected with the two ends of the power battery respectively; The two ends of the third capacitor are connected with the two ends of the DC charging port respectively.

10. A vehicle control system characterized by comprising: The discharging system according to any one of claims 7-9 and a control device connected with the discharging system for controlling the operation of the discharging system.

11. An automobile characterized by comprising: The whole vehicle control system according to claim 10.

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