CN112636661B

CN112636661B - Automobile and high-voltage control device

Info

Publication number: CN112636661B
Application number: CN201910907225.8A
Authority: CN
Inventors: 凌和平; 黄伟; 熊永; 宋淦; 林业福
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2019-09-24
Filing date: 2019-09-24
Publication date: 2022-10-18
Anticipated expiration: 2039-09-24
Also published as: CN112636661A

Abstract

The application discloses car and high-pressure control device is applied to the car field for reduce the sealed degree of difficulty of heater, improve the reuse rate of spare part and in order to reduce the volume of spare part. The high-voltage control device comprises a driving control module, a heater, high-voltage equipment and a bridge arm converter connected with the high-voltage equipment, wherein the driving control module is connected with the bridge arm converter, the heater is respectively connected with the driving control module and the bridge arm converter, and the bridge arm converter and the heater are both connected to an external battery; the driving control module is used for controlling the bridge arm converter to enable the external battery, the bridge arm converter and the high-voltage equipment to form a first energy conversion circuit; the driving control module is used for controlling the bridge arm converter to enable the external battery, the bridge arm converter and the heater to form a second energy conversion circuit.

Description

Automobile and high-voltage control device

Technical Field

The application relates to the technical field of automobiles, in particular to an automobile and a high-voltage control device.

Background

In the conventional technology, heating and cooling of an air conditioner are controlled by two independent switches respectively, and the same air blower is used for completing cooling and heating so as to realize different working conditions. The existing heater mainly comprises a control cabin, a heating cabin, a sealing structure and an insulating material in structure, the heater and a control module of the heater are integrated together so that the control module can control the heater independently, and the control cabin and the heating cabin are separated by the heater through the sealing structure and the insulating material. The heater with the integrated control cabin and heating cabin has several main disadvantages.

1. The body of the heater is generally made of plastic materials, and because the material change of expansion with heat and contraction with cold of the heater needs to be considered, a breathing hole which can only pass gas but can not pass liquid needs to be designed for the heater to balance the air pressure of the heater so as to prevent the deformation of the heater and the failure of an electric device. When the breathing hole fails, external liquid permeates a circuit board of the heater to cause the reduction of the insulation resistance value, the circuit board is ablated when the breathing hole is serious, an Insulated Gate Bipolar Transistor (IGBT) is broken down after short circuit to enable high-voltage electric conduction, the heater is self-heated, the heating current is normal at the moment, the fuse cannot function, and fire safety hidden trouble exists.

2. When the whole car is in the environment of high temperature and high humidity, microthermal liquid can form the comdenstion water in the control cabin when the aluminium groove of high temperature, when the comdenstion water accumulation is more and flow to automatically controlled board on, also can have insulation resistance to descend, probably causes the circuit board ablation, and IGBT is punctured and causes heater self-heating, has the potential safety hazard.

3. The heater divides the lower part, because upper and lower casing adopts plastic materials, the difficult long-term sealing performance of guaranteeing of seal structure in centre, when sealed the inefficacy, liquid infiltration control cabin back can have the potential safety hazard equally.

4. The heater needs to design an electric control loop independently to realize EMC interference resistance and disturbance to the outside, and meanwhile, a corresponding low-voltage connector needs to be arranged, so that the size of the body of the heater assembly is large, and troubles are brought to design and installation structures.

Disclosure of Invention

The embodiment of the application provides an automobile and a high-voltage control device, and aims to solve the technical problems that parts are high in sealing difficulty, difficult to maintain and low in control module reuse rate.

The high-voltage control device comprises a driving control module, a heater, high-voltage equipment and an axle arm converter connected with the high-voltage equipment, wherein the driving control module is connected with the axle arm converter, the heater is respectively connected with the driving control module and the axle arm converter, and the axle arm converter and the heater are both connected to an external battery;

the driving control module is used for controlling the bridge arm converter to enable the external battery, the bridge arm converter and the high-voltage equipment to form a first energy conversion circuit;

the driving control module is used for controlling the bridge arm converter to enable the external battery, the bridge arm converter and the heater to form a second energy conversion circuit.

According to another aspect of the present application, a vehicle is provided, which comprises the above-mentioned high-voltage control device.

The application provides an automobile and high-voltage control device controls first energy conversion circuit and second energy conversion circuit simultaneously through using same drive control module, make this drive control module peel off out relatively the heater on the one hand, reduce the sealed degree of difficulty to the heater, make simultaneously as devices such as drive control module and each switch by its control age or easy to maintain maintenance when the problem appears, on the other hand, same drive control module of first energy conversion circuit and second energy conversion circuit sharing and bridge arm converter can also improve the reuse rate of spare part, reduce high-voltage control device's volume.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the description of the embodiments of the present application will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings may be obtained according to these drawings without inventive labor.

Fig. 1 is a block diagram of a circuit structure of a high voltage control device according to an embodiment of the present disclosure;

FIG. 2 is a schematic circuit diagram of a high voltage control device according to an embodiment of the present disclosure;

FIG. 3 is a schematic circuit diagram of a high voltage control device according to an embodiment of the present disclosure;

FIG. 4 is a schematic circuit diagram of a high voltage control device according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of the environmental connections of the high voltage control device in an embodiment of the present application;

FIG. 6 is a schematic view of a waterway circulation system in an embodiment of the present application;

FIG. 7 is a schematic flow chart of control logic for the high voltage control device in an embodiment of the present application;

fig. 8 is a schematic structural diagram of an automobile according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.

Implementations of the present application are described in detail below with reference to the following specific figures:

fig. 1 is a block diagram of a circuit structure of a high-voltage control apparatus according to an embodiment of the present application, and the high-voltage control apparatus according to the embodiment of the present application is described in detail below with reference to fig. 1, as shown in fig. 1, the high-voltage control apparatus includes a driving control module 10, a heater 30, a high-voltage device 40, and an arm converter 20 connected to the high-voltage device 40, the driving control module 10 is connected to the arm converter 20, the heater 30 is connected to the driving control module 10 and the arm converter 20, respectively, where the arm converter 20 and the heater 30 are both connected to an external battery 50;

the driving control module 10 is configured to control the bridge arm converter 20 so that the external battery 50, the bridge arm converter 20, and the high-voltage device 40 form a first energy conversion circuit;

the drive control module 10 is configured to control the arm converter 20 such that the external battery 50, the arm converter 20, and the heater 30 form a second energy conversion circuit.

In one embodiment, the high pressure device is a compressor. When the high-voltage equipment is a compressor, the first energy conversion circuit is used for realizing refrigeration, and the second energy conversion circuit is used for realizing heating. In particular the second energy conversion circuit may be used for heating the external battery 50 as well as for heating the passenger compartment. When the second energy conversion circuit is used to heat the external battery 50, the water in the water pump may be controlled to flow around the external battery 50 and the heater 30 by the four-way valve to transfer heat to the external battery 50 to heat the external battery 50.

Further, the following five operating conditions can be formed by the first energy conversion circuit and the second energy conversion circuit: refrigerating only through air-conditioning high-pressure equipment; the external battery 50 is heated only by the heater 30; the passenger compartment and the external battery 50 are simultaneously heated by the heater 30; heating the passenger compartment only by the heater; the air conditioner is used for refrigerating through air conditioner high-pressure equipment and heating through a heater.

In the embodiment, the same driving control module 10 is used to control the first energy conversion circuit and the second energy conversion circuit simultaneously, on one hand, the driving control module 10 can be peeled off relative to the heater 30, so that the sealing difficulty of the heater 30 is reduced, and meanwhile, when the driving control module 10 and each switch and other devices controlled by the driving control module 10 have problems, the driving control module is easy to maintain, the first energy conversion circuit and the second energy conversion circuit share the same driving control module 10 and the same bridge arm converter 20, so that the reuse rate of parts can be improved, and the volume of the high-voltage control device can be reduced.

In one embodiment, the high-voltage device has at least two phase lines led out, the bridge arm converter includes bridge arms, the number of which is the same as that of the phase lines led out from the high-voltage device 40, each of the bridge arms is connected in parallel to form a first junction end and a second junction end, the phase lines of the high-voltage device 40 are connected with the midpoint of each of the bridge arms in a one-to-one correspondence manner, the driving control module 10 is connected with each of the bridge arms, the heater 30 includes a first heating control switch and at least one heating core, the first heating control switch is connected with the driving control module 10, the second junction end and the negative electrode of the external battery 50, the first junction end is connected with the positive electrode of the external battery 50, one end of the heating core is connected with the first heating control switch, the other end of the heating core is connected with the midpoint of any one of the bridge arms, and the heating core includes a heating resistor or a plurality of heating resistors connected in parallel with each other;

the driving control module 10 controls whether the heater is connected to the circuit by controlling the on-off state of the first heating control switch, and controls the heating time of the corresponding heater by controlling the conducting time of the first heating control switch.

Similarly, the first bus terminal may be connected to the negative electrode of the external battery 50, the second bus terminal may be connected to the positive electrode of the external battery 50, and other circuits are connected accordingly, where the only limitation is not imposed on the connection of the first bus terminal and the second bus terminal to the positive electrode and the negative electrode of the external battery 50. The different heating cores are connected with the middle points of the different bridge arms, so that current shunting in each bridge arm is facilitated, the phenomenon that the load of one bridge arm is too large is avoided, the service lives of the bridge arms of the bridge arm converter 20 are balanced, and the service life of the bridge arm converter 20 is prolonged.

In this embodiment, the driving control module 10 controls whether the corresponding heater 30 is connected to the circuit or not by controlling the on/off state of the first heating control switch, so as to control whether the second energy conversion circuit operates or not.

Further, the driving control module 10 may also adjust the time for which the corresponding heater 30 is energized by controlling the energization time of the power switch in the corresponding bridge arm converter 20 according to a PWM (Pulse width modulation) characteristic of the bridge arm converter 20, so as to adjust the power of the heater 30.

In the embodiment, the control modules of the high-voltage equipment and the heater are combined, the low-voltage side controlled by the heater is cancelled, the control part of the high-voltage equipment and the control part of the heater are combined into the same drive control module, the high-voltage equipment and the control part of the heater share the low-voltage control and protection module, meanwhile, the IGBT and the drive circuit of the high-voltage module can also realize multiplexing, and the switching and power control of different modules are realized by adjusting the opening number and the opening period of the IGBT. After combination, respective control logics can be reserved, and meanwhile, the cost of parts can be reduced. On the other hand, the heater control module is combined on the air conditioner controller, parts can be flatlined, the arrangement of parts and pipelines of the whole vehicle is facilitated, a control cabin of the heater is not needed, the size of the heater is reduced, the problem of voltage sharing inside and outside the electric control is not needed to be considered after the control cabin of the heater is removed, the sealing structure of the heater is easy to realize, the problem of insulation and pressure resistance can be solved after the electric control cabin and the heating cabin are separated, and the failure risk of the heater is reduced.

As shown in fig. 2 to 5, the first heating control switch is, for example, the first heating control switch 7 in fig. 2 to 5, and the first heating control switch 7 is used for controlling whether the heater 30 is connected to the circuit.

Alternatively, the first heating control switch may be a relay or an insulated gate bipolar transistor.

In one embodiment, the first heating control switch is a transistor switch, a gate of the transistor is connected to the driving control module 10, a source of the transistor is connected to the heater 30, and a collector of the transistor is connected to a negative electrode of the external battery and the second bus terminal. Specifically, the transistor may be a field effect transistor or a bipolar transistor.

This embodiment provides a feasible scheme for turning on the heater 30, the driving control module 10, the bridge arm inverter 20, and the external battery 50 through an Insulated Gate Bipolar Transistor (IGBT), and the driving control module 10 can control the voltage of the Gate of the IGBT to control whether the IGBT is turned on.

In one embodiment, each bridge arm includes two power switches, and each power switch is connected to the driving control module 10.

The driving control module 10 controls the on/off states of the power switch and the first heating control switch to connect the heater 30 into the circuit.

As shown in fig. 2 to 5, the bridge arm converter 20 is described in detail below by taking an example that the bridge arm converter 20 includes three bridge arms, where the bridge arm converter 20 includes a first bridge arm, a second bridge arm, and a third bridge arm, the first bridge arm includes a power switch 1 and a power switch 2, the second bridge arm includes a power switch 3 and a power switch 4, and the third bridge arm includes a power switch 5 and a power switch 6, where the power switch 1, the power switch 3, and the power switch 5 are upper bridge arms of corresponding bridge arms, and the power switch 2, the power switch 4, and the power switch 6 are lower bridge arms of corresponding bridge arms.

In one embodiment, the power switch represents an IGBT.

Fig. 5 is a schematic diagram of an environmental connection relationship of a high voltage control device in an embodiment of the present application, as shown in fig. 5, the driving control module 10 includes a Central Processing Unit (CPU) and a driving circuit, the driving control module 10 is disposed on an air conditioner controller electronic control board or a Positive Temperature Coefficient (PTC) heater electronic control board, where the heater electronic control board is an aluminum case, and the controller is separated into a high voltage side and a low voltage side after being isolated. The low-voltage side 12V power supply can be boosted to 15V and 5V voltage after DC/DC conversion. When an Electronic Control Unit (ECU) or a temperature acquisition Unit receives a relevant input signal, the input signal enters a digital converter through a CAN communication receiver, a CAN signal is converted into a digital signal and is input into the CPU, and the CPU controls an IGBT module on a low-voltage side to turn on and off the IGBT on the high-voltage side.

Fig. 3 is a schematic circuit diagram of a high-voltage control device in an embodiment of the present application, and in one embodiment, when the heater 30 includes two heating resistors, as shown in fig. 3, the two heating resistors are connected in parallel to form a first heating core, and the first heating core is connected to a midpoint of any one of the bridge arms of the bridge arm converter.

Further, a hall sensor for detecting a voltage and a current flowing through the corresponding heater 30 is provided in cooperation with the heater 30. Further, a hall sensor is also provided on any one of the phase lines from which the high-voltage device 40 is led, for detecting the voltage and current flowing through the high-voltage device 40.

As shown in fig. 2 to 5, a first hall sensor 61 is provided corresponding to the heater 30, and a second hall sensor 62 is provided on one of the phase lines from which the high-voltage device 40 is led.

As shown in fig. 2, the switching of the gear of the heater 30 is realized by controlling the on condition of the second heating control switch, so as to realize the control of the heating cores of the heater 30, for example, when the second heating control switch K10 is turned off, one of the heating cores is connected into the circuit, and when the second heating control switch K10 is turned on, two heating cores are simultaneously connected into the circuit, so as to realize the switching of the gear of the heating power of the heater.

The heater 30 can also utilize the PWM characteristic of IGBT in the power switch 1 to adjust the power of the heater 30 so as to realize the heating effect, the system loop detects the temperature value of IGBT, when the first heating control switch 7 controlling the heater 30 is IGBT, when the temperature of the power switch 1 is higher, the power switch 1 is controlled to be normally open, the IGBT control mode of the first heating control switch 7 in the normally open state is changed into PWM control, the power switch 1 and the first heating control switch 7 are alternately used, and the service life of IGBT is prolonged.

Fig. 2 is a schematic circuit diagram of a high-voltage control device in an embodiment of the present application, and in one embodiment, when the heater 30 includes two heating resistors, as shown in fig. 2, the two heating resistors form a second heating core and a third heating core, respectively, and the second heating core and the third heating core are connected to midpoints of different bridge arms in the bridge arm converter 20, respectively.

Fig. 4 is a schematic circuit structure diagram of a high voltage control device in an embodiment of the present invention, in one embodiment, when the heater 30 includes three heating resistors and the bridge arm inverter 20 includes at least three bridge arms, as shown in fig. 4, two of the three heating resistors are connected in parallel to form a fourth heating core, a third heating resistor of the three heating resistors forms a fifth heating core, and the fourth heating core and the fifth heating core are respectively connected to midpoints of different bridge arms in the bridge arm inverter 20.

In one embodiment, when the heater comprises a plurality of heating cores and the plurality of heating cores are connected with the middle points of different bridge arms, a second heating control switch is arranged between the adjacent heating cores.

Further, the second heating control switch is, for example, a second heating control switch K10 in fig. 2, a second heating control switch K11 in fig. 4. Alternatively, the second heating control switch may be a transistor switch or a relay.

The heater 30 is not heated by itself when the power switch in the bridge arm inverter 20 in this embodiment fails, and when the power switch in the bridge arm inverter 20 fails, the loop of the heater 30 can be cut off at any time by the first heating control switch or the second heating control switch, thereby effectively preventing thermal runaway.

Fig. 2 to fig. 5 show alternative connection manners of different numbers of heating cores in the heater 30, so that the high-voltage control device can be connected to the heating cores of different numbers according to different power requirements, different heating cores can be independently connected to a circuit, or can be connected to the circuit after being connected in parallel as non-independent cores, so that the high-voltage control device can realize adjustment of more heating gears and heating power.

In one embodiment, each of the bridge arms includes an upper power switch and a lower power switch, the upper power switch forms an upper bridge arm of the corresponding bridge arm, the lower power switch forms a lower bridge arm of the corresponding bridge arm, and the upper power switch and the lower power switch are both connected to the driving control module 10.

When the driving control module 10 controls only the external battery 50, the bridge arm inverter 20, and the heater 30 to form a second energy conversion circuit, the driving control module 10 controls the lower bridge arm of each bridge arm to be turned off.

When the external battery 50, the bridge arm inverter 20 and the heater 30 are controlled by the driving control module 10 to form a second energy conversion circuit for heating only, as shown in fig. 2 to 5, the power switch unit 2, the power switch unit 4 and the power switch unit 5 in the lower bridge arm are all turned off, so that a high-voltage short circuit of a high-voltage device can be prevented.

In one embodiment, the distance between the heater 30 and the external battery 50 is within a predetermined range. The preset range is specifically limited to how many can be set according to the size of the model of the automobile and the integration position of the parts. Setting the distance between the heater 30 and the external battery 50 within a preset range allows the heater 30 to be closer to the external battery 50, which can reduce the length of the pipeline, reduce the flow resistance of the pipeline and the heat loss.

In one embodiment, the heater 30 is integrated in a different location than the drive control module 10.

In the embodiment, the heater 30 and the driving control module 10 are integrated at different positions, so that the heater 30 is more favorably packaged, the packaging difficulty of the heater 30 is reduced, the influence of the high temperature of the heater 30 on the driving control module is reduced, and the driving control module 10 and the parts such as the switch controlled by the driving control module are convenient to repair and maintain independently after being damaged.

The above five operating conditions will be described in detail with reference to specific usage scenarios.

Working condition (1): when an air conditioner panel receives a refrigerating instruction, the air conditioner controller is controlled through CAN communication, meanwhile, the air conditioner controller receives high-voltage interlocking detection of the whole vehicle, high-voltage power-on permission is realized, and after actuation information of a main contactor and a negative contactor of an external battery is received, high-voltage electricity is transmitted to the air conditioner controller from a charging and distributing assembly through a high-voltage electricity, the air conditioner controller controls a first heating control switch and a second heating control switch to be disconnected through a low-voltage side loop, namely, the first heating control switch 7, the second heating control switch K10 or the second heating control switch K11 are controlled to be in a disconnection state, an IGBT in a bridge arm converter 20 outputs three-phase electricity to high-voltage equipment according to control disconnection time and a control sequence strategy, a Hall sensor collects current and voltage values of the high-voltage loop in real time, the refrigerating working condition of the high-voltage equipment is realized, and the IGBT in the bridge arm loop is closed after a target value is reached, so that the refrigerating working condition is completed.

Working condition (2): when the temperature sensor collects that the temperature of a power battery of the whole vehicle is low and reaches a target value for opening the battery heater 30, the same whole vehicle monitors high-voltage interlocking and high-voltage electrifying permission in real time, after the high-voltage loop self-inspection is completed, the CPU controls the IGBT driving circuit, namely the power switch 1, the power switch 3, the power switch 5, the first heating control switch 7 and the relay K10 to be opened, the adjustment of the gear of the heater 30 is realized or the PTC heater 30 is controlled through PWM to realize the adjustment of the heating power, and in order to prevent the high-voltage short circuit of high-voltage equipment, the power switch 2, the power switch 4 and the power switch 6 are in a turn-off state in the whole process. The heater 30 is provided with two groups of heating core bodies with different heating powers, when the whole vehicle is charged at a low power, the excessive heating power can cause the heater 30 to consume the electric quantity of the battery pack, so that the SOC value is reduced, and customers complain about the SOC value easily, therefore, the BMS can send corresponding power required by the heater 30 according to the different charging powers, and the air conditioner controller controls the power switch 1 and the IGBT of the power switch 3 to realize power regulation or realizes power regulation of the heater 30 through the value of the PWM duty ratio. And when the battery temperature reaches the design target value, all the IGBTs are closed, and the heating process is exited.

Working condition (3): the working principle of the working condition 3 is similar to that of the working condition 2, and the description is not repeated. As shown in fig. 6, when there is a heating demand in the passenger compartment and the external battery at the same time, the air conditioning controller adjusts the opening of the four-way valve body and the gear of the heater 30 according to the control strategy definition to realize the heat distribution between the passenger compartment and the battery. And when the passenger compartment and the battery reach the set target values, all the IGBTs are closed, and the heating process is exited.

Working condition (4): the working principle of the working condition 4 is similar to that of the working condition 2, and the description is not repeated. When the passenger cabin has a heating requirement, the IGBT driving loop enables the heater 30 to work, and the four-way valve is switched to the air conditioner heating loop to realize the heating working condition of the passenger cabin. And when the temperature of the passenger compartment reaches the set target value, all the IGBTs are closed, and the heating process is exited.

Working condition (5): and under the working condition 5, when the whole vehicle is in a low-temperature humid environment and the heating requirement of a battery or a passenger compartment is met when the whole vehicle needs defrosting and demisting, the logic control loop can intelligently control the starting time and power of the air conditioner high-voltage equipment and the PTC heater according to the defrosting function of the humidity sensor in the vehicle or the manual defrosting function, so that the defrosting and heating functions are realized.

As shown in fig. 7, when the high-voltage device is a compressor, the present embodiment provides a work flow of a two-in-one control scheme of the high-voltage device and the heater, and the work flow mainly includes a heating condition and a cooling condition.

When the compressor is started to perform the refrigeration working condition: when a passenger compartment or a battery sends a refrigeration request, a refrigeration process is started, the whole vehicle judges a high-pressure allowable state, the whole vehicle CAN communication transmits refrigeration information to an air conditioner controller through gateway conversion, an ECU unit receives related signals, then an air conditioner controller loop carries out self-detection, information fault states such as voltage, current, power, IGBT temperature, IGBT fault states, driving assembly states, VCU communication states and the like of a compressor are detected, if no fault exists, the refrigeration process is responded, a CPU controls on-off of a bridge arm converter, a first heating control switch and a second heating control switch, a heater 30 loop is disconnected, a U/V/W three-phase power of the compressor is obtained, a cooling system controls the gear and the rotating speed of the compressor according to the air conditioner setting gear and the temperature of the battery, the compressor is closed after a target value is reached, the refrigeration condition is completed, and an electric control continuously monitors signals for starting and stopping the refrigeration loop after the process is finished.

When the heater is started to heat: when the passenger compartment or the battery sends a heating request, the air conditioner controller performs the same processing on the input signal, detects a loop signal, judges an electric control logic loop and cuts off a high-voltage loop of the high-voltage equipment. When the whole vehicle is in a non-charging state, the heating loop controls the number of the IGBTs of the heater or the duty ratio of the IGBTs according to the temperature of the passenger compartment and the battery to realize the regulation of the heating function and the heating power; when whole car got into the charging process state, BMS was according to the appropriate adjustment heating power of the ability of filling electric pile, prevented among the charging process, the electric quantity of heater consumption battery, caused SOC to appear the phenomenon that descends. And when the temperature of the battery or the passenger compartment reaches a set target value, closing a control loop of the heater and ending the heating process, and continuously monitoring a signal for starting and stopping the heating loop after ending the process.

In the embodiment, the control module of the heater is combined with the control module of the high-voltage equipment, the control logic of the heater can be added on the basis of the logic and the architecture of the existing air conditioner controller by controlling the heater and the high-voltage equipment through the same drive control module, and the high-voltage wiring harness plugging port of the heater is added. The air conditioner controller is generally integrated at the rear end of the high-voltage equipment, the aluminum casting material is adopted, a breathing hole does not need to be additionally designed, the risk that condensate water causes damage to electric control board elements does not exist, and meanwhile, the water tightness of the aluminum casting material is easy to realize compared with that of a plastic shell.

According to another embodiment of the present application, an automobile is provided, and fig. 8 is a schematic structural diagram of an automobile according to an embodiment of the present application, and as shown in fig. 8, the automobile includes the high-voltage control device.

The application provides a car and high-voltage control device controls first energy conversion circuit and second energy conversion circuit simultaneously through using same drive control module, make this drive control module peel off out relatively the heater on the one hand, reduce the sealed degree of difficulty to the heater, make simultaneously when devices such as drive control module and by its control go wrong easily maintain, first energy conversion circuit and second energy conversion circuit share same drive control module and bridge arm converter can also improve the reuse rate of spare part, reduce high-voltage control device's volume.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present application, and they should be construed as being included in the present application.

Claims

1. A high-voltage control device is characterized by comprising a drive control module, a heater, high-voltage equipment and an arm converter connected with the high-voltage equipment, wherein the drive control module is connected with the arm converter, the heater is respectively connected with the drive control module and the arm converter, and the arm converter and the heater are both connected to an external battery;

at least two phase lines are led out of the high-voltage equipment, the number of bridge arms included in the bridge arm converter is the same as that of the phase lines led out of the high-voltage equipment, the bridge arms are connected in parallel to form a first junction end and a second junction end, the phase lines of the high-voltage equipment are correspondingly connected with the middle points of the bridge arms one by one, and the driving control module is respectively connected with each bridge arm;

the heater comprises a first heating control switch and at least one heating core body, wherein the first end of the first heating control switch is connected with the driving control module, the second end of the first heating control switch is connected with one end of the heating core body, the third end of the first heating control switch is connected with the negative electrode of the external battery, the first confluence end is connected with the positive electrode of the external battery, and the other end of the heating core body is connected with the midpoint of any bridge arm;

2. The high voltage control device of claim 1, wherein the heater core comprises one heater resistor or a plurality of heater resistors connected in parallel with each other;

the drive control module controls whether the heater is connected into a circuit or not by controlling the on-off state of the first heating control switch, and controls the heating time of the corresponding heater by controlling the conducting time of the first heating control switch.

3. The high voltage control device of claim 2, wherein when the heater comprises two heating resistors, the two heating resistors are connected in parallel to form a first heating core, and the first heating core is connected to a midpoint of any one of the bridge arms of the bridge arm inverter.

4. The high voltage control device of claim 2, wherein when the heater comprises two heater resistors, the two heater resistors form a second heater core and a third heater core, respectively, and the second heater core and the third heater core are connected to the midpoints of different bridge arms in the bridge arm inverter, respectively.

5. The high voltage control apparatus of claim 2, wherein when the heater comprises three heating resistors and the bridge arm inverter comprises at least three bridge arms, two of the three heating resistors are connected in parallel to form a fourth heating core, a third of the three heating resistors forms a fifth heating core, and the fourth and fifth heating cores are connected to the midpoints of different bridge arms of the bridge arm inverter, respectively.

6. The high-voltage control device according to claim 2, wherein each bridge arm comprises two power switches, and each power switch is connected with the drive control module;

the driving control module is used for connecting the heater into a circuit by controlling the on-off states of the power switch and the first heating control switch.

7. The apparatus of claim 2, wherein when the heater includes a plurality of heater cores and the plurality of heater cores are connected to midpoints of different bridge arms, a second heater control switch is provided between adjacent heater cores.

8. The high-voltage control device according to claim 2, wherein each of the bridge arms comprises an upper power switch and a lower power switch, the upper power switch forms an upper bridge arm of the corresponding bridge arm, the lower power switch forms a lower bridge arm of the corresponding bridge arm, and the upper power switch and the lower power switch are both connected to the driving control module;

and when the drive control module only controls the external battery, the bridge arm converter and the heater to form a second energy conversion circuit, the drive control module controls the lower bridge arms of the bridge arms to be disconnected.

9. The high pressure control device of any one of claims 1 to 8, wherein the heater is integrated in a different location from the drive control module.

10. An automobile characterized by comprising a high-voltage control apparatus according to any one of claims 1 to 9.