CN106564390A

CN106564390A - Electric vehicle and high voltage system thereof, detection method for high voltage system and precharge circuit

Info

Publication number: CN106564390A
Application number: CN201510661101.8A
Authority: CN
Inventors: 邵桂欣
Original assignee: Beijing Electric Vehicle Co Ltd
Current assignee: Beijing Electric Vehicle Co Ltd
Priority date: 2015-10-12
Filing date: 2015-10-12
Publication date: 2017-04-19
Anticipated expiration: 2035-10-12
Also published as: CN106564390B; WO2017063561A1

Abstract

The invention discloses an electric vehicle and a high voltage system thereof, a detection method for the high voltage system and a precharge circuit. The high voltage system of the electric vehicle comprises a traction battery circuit, the precharge circuit which is connected in series with the traction battery circuit and a controller, wherein the traction battery circuit comprises a traction battery and a negative electrode relay and the first end of the negative electrode relay is connected to the negative electrode of the traction battery; the precharge circuit comprises a precharge relay and a precharge resistor matrix which are connected in parallel with a positive electrode relay, and the precharge relay is connected in series with the precharge resistor matrix which comprises a plurality of precharge resistors; and the controller is respectively connected with the positive electrode relay, the negative electrode relay and the precharge relay, for controlling the connection in proper order of the negative electrode relay, the precharge relay and the positive electrode relay to enable the safe power-on of the high voltage system by the precharge resistor matrix. The electric vehicle and the high voltage system thereof,, the detection method for the high voltage system and the precharge circuit solve the technical problem of the occurrence of impulse currents at the moment of closing the precharge relay in the case of a short circuit of a single precharge resistor.

Description

Electric automobile and its high-pressure system, detection method and pre-charge circuit

Technical field

The present invention relates to new-energy automobile field, in particular to a kind of electric automobile and its high-pressure system, detection Method and pre-charge circuit.

Background technology

New-energy automobile (such as pure electric automobile, hybrid vehicle and fuel cell car) is containing low pressure and high pressure two Individual electrical voltage system.Wherein, used as the control system of new-energy automobile, high-pressure system is used as new-energy automobile for low-pressure system The energy system and drive system are provided.The electric pressure of high-pressure system is generally greater than 200V, with voltage height, electric current Big the characteristics of, beyond the safe voltage scope of personnel.The energy of new-energy automobile provides system includes battery system, electricity The load of cell system is multiple high-voltage load parts such as electric system, is the steady of guarantee high-voltage load part input voltage Qualitative, high-voltage load part input is connected to the electric capacity of voltage regulation of high-voltage large-capacity；To reduce electric current during system electrification Impact, is provided with preliminary filling electrical circuit in high tension loop.

Fig. 1 is a kind of new-energy automobile pre-charge circuit figure according to prior art, as shown in Figure 1：Preliminary filling electrical circuit It is made up of pre-charge contactor, pre-charge resistance and positive contact device, wherein, pre-charge resistance is single power resistor. The precharge loop structure is simple, and in the case of circuit is trouble-free, can solve power up rush of current Problem, but because pre-charge contactor does not have feedback of status, when circuit inner part breaks down, it is impossible to which what is avoided goes out Existing heavy current impact damages the problem of system unit.And in pre-charge resistance short circuit, control system also cannot be diagnosed Judge.

There is no feedback of status for above-mentioned pre-charge contactor, it is impossible to the problem whether broken down inside decision circuitry, The pre-charge circuit in Fig. 1 is improved in prior art, Fig. 2 is another new forms of energy according to prior art Automobile pre-charge circuit figure, as shown in Fig. 2 the pre-charge contactor in pre-charge circuit increases feedback states, accesses Full-vehicle control unit, and voltage detecting after increasing battery terminal voltage detection and being pre-charged (such as V1, V2 in figure).Such as Pre-charge circuit shown in Fig. 2 can detect the state of pre-charge contactor and preliminary filling process, but still cannot avoid In the case of pre-charge resistance short circuit, the problem of pre-charge contactor moment impact electric current is closed, also, in preliminary filling In the case of breaking down inside circuit, control system also cannot diagnositc decision.

For above-mentioned in the case of pre-charge resistance short circuit, there is asking for dash current in closure pre-charge contactor moment Topic, not yet proposes at present effective solution.

The content of the invention

A kind of electric automobile and its high-pressure system, detection method and pre-charge circuit are embodiments provided, so that Few to solve in the case of the short circuit of single pre-charge resistance, there is the technology of dash current in closure pre-charge-relay moment Problem.

A kind of one side according to embodiments of the present invention, there is provided high-pressure system of electric automobile, including：Power electric Pond circuit, including electrokinetic cell and negative pole relay, the first end of negative pole relay is connected to the negative pole of electrokinetic cell； With the pre-charge circuit of electrokinetic cell circuit connected in series, pre-charge circuit includes：The precharge in parallel with positive pole relay after Electrical equipment and pre-charge resistance matrix, pre-charge-relay is connected with pre-charge resistance matrix, and pre-charge resistance matrix includes Multiple pre-charge resistances；Controller, is connected respectively with positive pole relay, negative pole relay and pre-charge-relay, uses After in turn switching in control negative pole relay, pre-charge-relay and positive pole relay, using pre-charge resistance square Battle array control high-pressure system is upper electric safely.

Further, pre-charge resistance matrix includes：N group pre-charge resistance set, every group of pre-charge resistance collection merges Connection connection, every group of pre-charge resistance set includes at least one pre-charge resistance, in any one group of pre-charge resistance set In the case of multiple pre-charge resistances, each pre-charge resistance included in pre-charge resistance set is connected in series.

Further, system also includes：First voltage table, it is in parallel with electrokinetic cell, for detecting the of electrokinetic cell One magnitude of voltage；Second voltage table, the first end of second voltage table access pre-charge-relay and pre-charge resistance matrix it Between node, the second end is connected with the second end of negative pole relay, for detecting the second voltage value of pre-charge resistance； Tertiary voltage table, it is in parallel with high-voltage load, for detecting the third voltage value at high-voltage load two ends；Controller is additionally operable to During control negative pole relay, pre-charge-relay and positive pole relay are in turn switched on, obtained according to detection First voltage value, second voltage value and third voltage value, control high-pressure system is upper electric safely.

Further, controller reads first voltage value, if first for reading is electric after the completion of power-up initializing Pressure value is less than predeterminated voltage, it is determined that control inspection switch closure failure, then control high-pressure system and interrupt upper electricity；If read The first voltage value got is more than or equal to predeterminated voltage, then read the device-identification information of negative pole relay, if read To the device-identification information of negative pole relay meet default first pre-conditioned, it is determined that control inspection switch is closed into Work(and negative pole relay is in an ON state, then control high-pressure system and interrupt upper electricity, otherwise, it determines control inspection switch Close success and negative pole relay is off.

Further, it is determined that control inspection switch closure success and in the case that negative pole relay is off, Controller sends the instruction of control negative pole relay closure, now reads the device-identification information of negative pole relay, if The device-identification information of the negative pole relay for reading be unsatisfactory for it is first pre-conditioned, it is determined that control negative pole relay closure Failure, then control high-pressure system and interrupt upper electricity, otherwise, it determines control inspection switch closes successfully and control negative pole relay Device is closed successfully.

Further, first voltage value and second electric it is determined that in the case of control negative pole relay closure success, is being read Pressure value, if the first voltage value for reading is in preset range with the difference of second voltage value, determines inspection switch In closure state, negative pole relay in an ON state and pre-charge-relay controls in an ON state, then high pressure Electricity in system break, otherwise, it determines control inspection switch close successfully, control the connection success of negative pole relay and preliminary filling Electrical relay is off.

Further, it is determined that control inspection switch close successfully, control negative pole relay connect successfully and precharge after In the case that electrical equipment is off, first voltage value and second voltage value are now read, if read first Magnitude of voltage is not equal to and second voltage value is zero, it is determined that control pre-charge-relay closure failure, then control high-pressure system Electricity in interruption, otherwise, if the first voltage value for reading is in preset range, really with the difference of second voltage value Surely control inspection switch close successfully, control negative pole relay connect successfully and control pre-charge-relay close successfully.

Further, it is determined that control inspection switch close successfully, control negative pole relay connect successfully and precharge after In the case that electrical equipment is off, controller sends the instruction of control pre-charge-relay closure, now reads pre- The device-identification information of charge relay, if the device-identification information of the pre-charge-relay for reading is unsatisfactory for second It is pre-conditioned, it is determined that control pre-charge-relay closure failure, then control high-pressure system and interrupt upper electricity, otherwise, if The device-identification information satisfaction second of the pre-charge-relay for reading is pre-conditioned, it is determined that control inspection switch is closed into Work(, control negative pole relay are connected successfully and control pre-charge-relay and close successfully.

Further, it is determined that control inspection switch close successfully, control negative pole relay connect successfully and control preliminary filling In the case of electrical relay closure success, read real-time detection to third voltage value, and by third voltage value with prestore Safe voltage value is compared, if the growth rate after third voltage value compares with safe voltage value within the unit interval is low In predetermined threshold, it is determined that have resistance interruption in pre-charge resistance matrix, if third voltage value is within the unit interval Growth rate is higher than predetermined threshold, it is determined that have resistive short in pre-charge resistance matrix.

Further, in the case of it is determined that having resistance interruption or short circuit in pre-charge resistance matrix, not open circuit or short circuit Resistance set meet the resistor power of high-pressure system, then controller sends the instruction of control positive pole relay closure, makes Obtain positive pole relay to connect.

Another aspect according to embodiments of the present invention, additionally provides a kind of method of the high-pressure system of detection electric automobile, High-pressure system includes：Electrokinetic cell circuit, including electrokinetic cell and negative pole relay, the first end of negative pole relay connects It is connected to the negative pole of electrokinetic cell；With the pre-charge circuit of electrokinetic cell circuit connected in series, pre-charge circuit includes：With positive pole Relay pre-charge-relay in parallel and pre-charge resistance matrix, pre-charge-relay is connected with pre-charge resistance matrix, Pre-charge resistance matrix includes multiple pre-charge resistances；Respectively with positive pole relay, negative pole relay and precharge relay The controller of device connection, wherein, the method includes：Controller is in control negative pole relay, pre-charge-relay and just It is upper electric safely using pre-charge resistance matrix majorization high-pressure system after pole relay is in turn switched on.

Further, system also includes：The first voltage table in parallel with electrokinetic cell, for detecting the of electrokinetic cell One magnitude of voltage；Second voltage table, the first end of second voltage table access pre-charge-relay and pre-charge resistance matrix it Between node, the second end is connected with the second end of negative pole relay, for detecting the second voltage value of pre-charge resistance； Tertiary voltage table, it is in parallel with high-voltage load, for detecting the third voltage value at high-voltage load two ends, wherein, method is also Including：Controller during control negative pole relay, pre-charge-relay and positive pole relay are in turn switched on, root The negative pole relay that the first voltage value that obtains according to detection, second voltage value, third voltage value and controller read Device-identification information, the safe upper electricity of control high-pressure system.

Another aspect according to embodiments of the present invention, additionally provides a kind of pre-charge circuit, and the pre-charge circuit is arranged on Between electrokinetic cell circuit and high-voltage load, pre-charge circuit includes：First sub- pre-charge circuit, including：Positive pole after Electrical equipment；Second sub- pre-charge circuit, it is in parallel with the first sub- pre-charge circuit, including：The precharge relay being connected in series Device and pre-charge resistance matrix, pre-charge resistance matrix includes multiple pre-charge resistances.

Another aspect according to embodiments of the present invention, additionally provides a kind of electric automobile, it is characterised in that include：This The high-pressure system of any one in application embodiment.

Another further aspect according to embodiments of the present invention, additionally provides a kind of electric automobile, it is characterised in that include：This The pre-charge circuit of any one in application embodiment.

In embodiments of the present invention, using electrokinetic cell circuit, including electrokinetic cell and negative pole relay, negative pole relay The first end of device is connected to the negative pole of electrokinetic cell；With the pre-charge circuit of electrokinetic cell circuit connected in series, pre-charge circuit Including：The pre-charge-relay in parallel with positive pole relay and pre-charge resistance matrix, pre-charge-relay and precharge Resistor matrix is connected, and pre-charge resistance matrix includes multiple pre-charge resistances；Controller, respectively with positive pole relay, Negative pole relay and pre-charge-relay connect, in control negative pole relay, pre-charge-relay and positive pole relay After device is in turn switched on, using pre-charge resistance matrix majorization high-pressure system mode above electric safely, by precharge Pre-charge resistance matrix used in circuit, has reached in pre-charge resistance short circuit, reduces the purpose of dash current, enters And solve in the case of the short circuit of single pre-charge resistance, there is the skill of dash current in closure pre-charge-relay moment Art problem.

Description of the drawings

Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this Bright schematic description and description does not constitute inappropriate limitation of the present invention for explaining the present invention.In accompanying drawing In：

Fig. 1 is a kind of new-energy automobile pre-charge circuit figure according to prior art；

Fig. 2 is another the new-energy automobile pre-charge circuit figure according to prior art；

Fig. 3 is the schematic diagram of electric automobile high-voltage system according to embodiments of the present invention；And

Fig. 4 is the circuit diagram of a kind of optional electric automobile high-voltage system according to embodiments of the present invention.

Specific embodiment

In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention Accompanying drawing, is clearly and completely described to the technical scheme in the embodiment of the present invention, it is clear that described embodiment The only embodiment of a present invention part, rather than the embodiment of whole.Based on the embodiment in the present invention, ability The every other embodiment that domain those of ordinary skill is obtained under the premise of creative work is not made, all should belong to The scope of protection of the invention.

It should be noted that description and claims of this specification and the term " first " in above-mentioned accompanying drawing, " Two " it is etc. the object for distinguishing similar, without for describing specific order or precedence.It should be appreciated that this The data that sample is used can be exchanged in the appropriate case, so as to embodiments of the invention described herein can with except Here the order beyond those for illustrating or describing is implemented.Additionally, term " comprising " and " having " and they Any deformation, it is intended that covering is non-exclusive to be included, and for example, contains process, the side of series of steps or unit Method, system, product or equipment are not necessarily limited to those steps clearly listed or unit, but may include unclear List or other steps intrinsic for these processes, method, product or equipment or unit.

Embodiment one

According to embodiments of the present invention, there is provided a kind of high-pressure system embodiment of electric automobile, Fig. 3 is according to the present invention The schematic diagram of the electric automobile high-voltage system of embodiment；Fig. 4 is a kind of optional electronic vapour according to embodiments of the present invention The circuit diagram of car high-pressure system.In the diagram, BMS：The battery management system of electrokinetic cell；VMS：Entire car controller； Electric capacity C represents the equivalent capacity of multiple high-voltage load input capacitances；K1：Inspection switch；K2：Negative pole relay；K3： Pre-charge-relay；K4：Positive pole relay；R1 to Rn：Pre-charge resistance；V1, V2 and V3 are voltage detecting electricity Road；A is current sensor.Sign A：The control end of negative pole relay, accesses BMS；Sign B：Precharge relay The control end of device, accesses BMS；Sign C：The control end of positive pole relay, accesses BMS；Sign D：Negative pole relay The feedback of status end of device, accesses BMS；Sign E：The feedback of status end of pre-charge-relay, accesses BMS；Sign F： The feedback of status end of positive pole relay, accesses BMS.

As shown in figure 3, the system includes：

Electrokinetic cell circuit 10, including electrokinetic cell and negative pole relay, the first end of negative pole relay is connected to power The negative pole of battery.

Specifically, the electrokinetic cell in above-mentioned electrokinetic cell circuit 10 can provide the energy for the high-voltage load of electric automobile, Electrokinetic cell is connected in series with negative pole relay, and the negative pole of electrokinetic cell is connected with the first end of negative pole relay.

With the pre-charge circuit 12 of electrokinetic cell circuit connected in series, pre-charge circuit 12 can include：With positive pole relay The pre-charge-relay and pre-charge resistance matrix of parallel connection, pre-charge-relay is connected with pre-charge resistance matrix, preliminary filling Electric resistor matrix includes multiple pre-charge resistances.

Controller 14, is connected respectively with positive pole relay, negative pole relay and pre-charge-relay, for negative in control After pole relay, pre-charge-relay and positive pole relay are in turn switched on, using pre-charge resistance matrix majorization high pressure System is upper electric safely.

It should be noted that with reference to Fig. 3, Fig. 4, controller noted above 14 can be the battery management system of electrokinetic cell BMS can also be entire car controller VMS.

Alternatively, pre-charge resistance matrix can include：N group pre-charge resistance set, every group of pre-charge resistance set It is connected in parallel, every group of pre-charge resistance set includes at least one pre-charge resistance, in any one group of pre-charge resistance collection In the case that conjunction includes multiple pre-charge resistances, each pre-charge resistance included in pre-charge resistance set is connected in series.

It follows that above-mentioned pre-charge resistance matrix can be the resistor matrix being made up of multiple pre-charge resistances, for example, Pre-charge resistance can be the resistor matrix of the resistor matrix of N*N, or N*M, wherein, N, M are natural number, N≠M.For example, in a kind of alternative as shown in Figure 4, pre-charge resistance matrix can with the resistor matrix of 3*3, I.e. 3 resistant series obtain one group of pre-charge resistance set, and then 3 groups of pre-charge resistance set are connected in parallel.Herein It should be noted that the resistance in above-mentioned pre-charge resistance matrix can be with identical, it is also possible to select different resistances on demand Resistance constitute.

Analysis understands that the above embodiments of the present application replace existing single precharge by using pre-charge resistance matrix Resistance, even if when short circuit occurs in a certain pre-charge resistance, other pre-charge resistances in pre-charge resistance matrix are still The purpose of part in protection system can be reached, the high tension loop short circuit caused because of pre-charge resistance short circuit can be avoided to produce The problem of raw rush of current.

Also, it should be noted that the circuit diagram with reference to shown in Fig. 1 to 4 understands that in the prior art pre-charge resistance is It is C in the equivalent high-voltage capacitance capacitance of high-voltage load input when one, the terminal voltage of electrokinetic cell is [V0, Vt], Precharge time is T<During 500ms, single pre-charge resistance R can be as follows calculated, according to T >=t=-RC l n (1-V_t/V₀), pre-charge resistance resistance R≤- TC/l n (1-V_t/V₀).Single preliminary filling can as follows be calculated The power P of resistance, P >=V2*V2/R*2*T.When using pre-charge resistance matrix, with the pre- of 3*3 as indicated at 4 As a example by charging resistor matrix, when the pre-charge resistance resistance in pre-charge resistance matrix and single pre-charge resistance resistance phase Meanwhile, i.e. R0=R1=... R9=R, in the case of all pre-charge resistances in pre-charge resistance matrix are normal, often Individual pre-charge resistance performance number is：P1=P2=...=P9=P/9；The feelings of a certain resistive short in pre-charge resistance matrix Under condition, each pre-charge resistance performance number is：P1=P2=...=P9=P/4；The a certain resistance in preliminary filling point resistor matrix In the case of open circuit, each pre-charge resistance performance number is：P1=P2=...=P9=P/9.Above-mentioned power maximum is taken, Then the resistor power in pre-charge resistance matrix can be：P1=P2=...=P9=P/4.That is, with single preliminary filling Resistance R of resistance is compared, and the resistance of each pre-charge resistance in pre-charge resistance matrix can be with constant, with list The power P of individual pre-charge resistance is compared, and the power of each pre-charge resistance in pre-charge resistance matrix can be single The a quarter of individual pre-charge resistance performance number, i.e. P/4.The power of pre-charge resistance is bigger, in actual resistance Limitation during type selecting is higher, and the cost of resistance also will be higher.By using pre-charge resistance matrix, reducing Restriction in pre-charge resistance matrix during each pre-charge resistance type selecting, in actual selection resistance, the interval of selection To widen significantly.Additionally, the volume of resistance is proportional with the power of resistance, reducing power accumulates can resistive element Reduce, when the power reduction of each pre-charge resistance in pre-charge resistance matrix, in electric automobile limited space In the case of, can be that the physics and electric specific design of electric automobile brings convenience, the more conducively electricity of system Gas is integrated and thermal design.Further, the price of resistance and the power of resistance are proportional, and power is reduced can be with Pre-charge resistance cost is greatly reduced, beneficial to the control of electric automobile cost.

In addition, the embodiment with reference to shown in Fig. 4, the controller 14 in the above embodiments of the present application can be negative by control Pole relay K2, pre-charge-relay K3 and positive pole relay K4 are in turn switched on, by pre-charge resistance matrix to electricity The delay of stream, during making system electrification, gradually increase with the increase electric current of precharge time, it is to avoid system electrification When rush of current to each part in system.

Under a kind of optional application scenarios, as shown in figure 4, it is short to work as a certain pre-charge resistance in pre-charge resistance matrix Lu Shi, occurs on the branch road of pre-charge resistance short circuit, and the power of other pre-charge resistances is that pre-charge resistance does not occur 1.5 times under short-circuit conditions, as precharge time T<500ms, the electric current in circuit is with precharge time increase Reduce, thus other pre-charge resistances that other are not short-circuited in pre-charge resistance matrix, still can meet car load Precharge design requirement.For other pre-charge resistances that other are not short-circuited in pre-charge resistance matrix, still Meet the requirement of resistor power, only precharge time extends, and does not affect car load high-voltage operation, it is to avoid because of precharge High tension loop caused by resistive short produces the problem of rush of current.

It should be noted that in the embodiment of the present application, above-mentioned negative pole relay can be cathode contact device, above-mentioned positive pole Relay can be positive contact device, and pre-charge-relay can be pre-charge contactor.

Embodiment with reference to shown in Fig. 3 and Fig. 4, in embodiments of the present invention, the electrokinetic cell circuit 10 for adopting can be with Including electrokinetic cell and negative pole relay K2, the first end of negative pole relay K2 is connected to the negative pole of electrokinetic cell；With The pre-charge circuit of electrokinetic cell circuit connected in series, pre-charge circuit 12 includes：The preliminary filling in parallel with positive pole relay K4 Electrical relay K3 and pre-charge resistance matrix, pre-charge-relay K3 is connected with pre-charge resistance matrix, precharge electricity Resistance matrix includes multiple pre-charge resistances；Controller 14, respectively with positive pole relay K4, negative pole relay K2 and pre- Charge relay K3 connects, in control negative pole relay K2, pre-charge-relay K3 and positive pole relay K4 After in turn switching on, using pre-charge resistance matrix majorization high-pressure system mode above electric safely, by precharge electricity Pre-charge resistance matrix used in road, has reached in pre-charge resistance short circuit, reduces the purpose of dash current, and then Solve in the case of the short circuit of single pre-charge resistance, closure pre-charge-relay moment has the technology of dash current Problem.

Alternatively, as shown in figure 4, the system can also include：

First voltage table, it is in parallel with electrokinetic cell, for detecting the first voltage value of electrokinetic cell.

Second voltage table, the first end of second voltage table is accessed between pre-charge-relay K3 and pre-charge resistance matrix Node, the second end is connected with second end of negative pole relay K2, for detecting the second voltage value of pre-charge resistance.

Tertiary voltage table, it is in parallel with high-voltage load, for detecting the third voltage value at high-voltage load two ends.

Controller is additionally operable to be in turn switched in control negative pole relay K2, pre-charge-relay K3 and positive pole relay K4 During, according to first voltage value, second voltage value and third voltage value that detection is obtained, control high-pressure system peace Quan Shang electricity.

Alternatively, controller is additionally operable to after the completion of power-up initializing, controls the inspection switch closure inside electrokinetic cell, Wherein, if control inspection switch closure failure, control high-pressure system interrupts upper electricity；Controller is additionally operable in control In the case that inspection switch closes success and negative pole relay in an ON state, control high-pressure system interrupts upper electricity.

From such scheme, in a kind of optional scheme, controller reads first after the completion of power-up initializing Magnitude of voltage, if the first voltage value for reading is less than predeterminated voltage, it is determined that the K1 closure failures of control inspection switch, then Control high-pressure system interrupts upper electricity；If the first voltage value for reading be more than or equal to predeterminated voltage, read negative pole after The device-identification information of electrical equipment K2, if the device-identification information of the negative pole relay K2 for reading meets default One is pre-conditioned, it is determined that control inspection switch K1 closure successes and negative pole relay K2 is in an ON state, then control High-pressure system interrupts above electricity, otherwise, it determines control inspection switch K1 closes success and negative pole relay K2 is in disconnection State.

Specifically, when inspection switch K1 is closed, the magnitude of voltage of the detection electrokinetic cell of first voltage table, if first The first voltage value of voltmeter is less than predeterminated voltage, and indication circuit failure, output voltage is not equal to the voltage of electrokinetic cell. Predeterminated voltage herein can be default calibration value, be determined according to the nominal voltage of electrokinetic cell.

Alternatively, controller is additionally operable to it is determined that control inspection switch closes success and negative pole relay is off In the case of, control negative pole relay closure, wherein, if the relay closure failure of control negative pole, controls high pressure Electricity in system break.

From such scheme, in a kind of optional scheme, it is determined that control inspection switch K1 closure successes and negative pole In the case that relay K2 is off, controller sends the instruction of control negative pole relay K2 closures, now The device-identification information of negative pole relay K2 is read, if the device-identification information of the negative pole relay K2 for reading is not Meet first pre-conditioned, it is determined that the K2 closure failures of control negative pole relay, then control high-pressure system and interrupt upper electricity, it is no Then, it is determined that control inspection switch K1 is closed successfully and control negative pole relay K2 is closed successfully.

Specifically, as shown in figure 4, judging whether the state in connecting can also be by state negative pole relay K2 Determining, the feedback of status end D access controllers of negative pole relay K2, controller can be anti-by state for message identification The signal that feedback end D sends is high level or low level determining negative pole relay K2 in an ON state or disconnect shape State.

Alternatively, if controller is additionally operable to control the closure success of negative pole relay and pre-charge-relay is in connection shape In the case of state, control high-pressure system interrupts upper electricity.

From such scheme, in a kind of optional scheme, it is determined that control negative pole relay K2 closes successful feelings Under condition, first voltage value and second voltage value are read, if the difference of the first voltage value for reading and second voltage value In preset range, determine inspection switch K1 in closure state, negative pole relay K2 in an ON state and in advance Charge relay K3 controls in an ON state, then high-pressure system and interrupts upper electricity, otherwise, it determines control inspection switch K1 close successfully, control negative pole relay K2 connects success and pre-charge-relay K3 is off.Preferably, First voltage value in the embodiment can be with equal with second voltage value.

Specifically, in the case of it is determined that control negative pole relay K2 closes success, when first voltage value and second voltage When the difference of value is in preset range, represent that pre-charge-relay K3 is also at on-state.Because controller is controlled successively Negative pole relay K2 processed, pre-charge-relay K3 and positive pole relay K4 are closed successively, are not controlled in controller pre- When charge relay K3 is connected, pre-charge-relay K3 in an ON state, represents that now abnormal, example occurs in circuit As pre-charge-relay K3 sticks together.

Alternatively, controller be additionally operable to control inspection switch close successfully, control negative pole relay and close successfully and in advance In the case that charge relay is off, control pre-charge-relay closure, wherein, if control precharge Relay closure failure, then control high-pressure system and interrupt upper electricity.

From such scheme, in a kind of optional scheme, it is determined that control inspection switch K1 close successfully, control Negative pole relay K2 is connected in the case that success and pre-charge-relay K3 be off, and now reads first electric Pressure value and second voltage value, if the first voltage value for reading is not equal to zero and second voltage value is zero, it is determined that control Pre-charge-relay K3 disconnects successfully, then control high-pressure system and interrupt upper electricity, otherwise, if the first voltage for reading Value with the difference of second voltage value in preset range, it is determined that control inspection switch K1 close successfully, control negative pole after Electrical equipment K2 is connected successfully and is controlled pre-charge-relay K3 and closes successfully.

Alternatively, it is determined that control inspection switch K1 close successfully, control negative pole relay K2 connection success and preliminary filling In the case that electrical relay K3 is off, controller sends the instruction of control pre-charge-relay K3 closure, The device-identification information of pre-charge-relay K3 is now read, if the state mark of pre-charge-relay K3 for reading Knowledge information be unsatisfactory for it is second pre-conditioned, it is determined that control pre-charge-relay K3 closure failure, then control in high-pressure system Disconnected upper electricity, otherwise, if the device-identification information satisfaction second of pre-charge-relay K3 for reading is pre-conditioned, really Surely control inspection switch K1 close successfully, control negative pole relay K2 connect successfully and control pre-charge-relay K3 Close successfully.

Specifically, judge state of pre-charge-relay K3 whether in connecting can also be by status information mark come It is determined that, as shown in figure 4, the feedback of status end E access controllers of pre-charge-relay K3, controller can pass through shape The signal that state feedback end E sends be high level or low level determining pre-charge-relay K3 in an ON state or Off-state.

It should be noted that the application by controller control negative pole relay K2, pre-charge-relay K3 successively with And positive pole relay K4 is closed successively, negative pole relay K2, pre-charge-relay K3 and positive pole relay K4 are judged State, be the offering convenience property of fault diagnosis of car load, it is ensured that the safe operation of car load.

Alternatively, with reference to Fig. 4 understand, it is determined that control inspection switch K1 close successfully, control negative pole relay K2 In the case of connecting successfully and controlling the closure success of pre-charge-relay K3, real-time detection is read to third voltage value, and Third voltage value is compared with the safe voltage value for prestoring, if third voltage value and safety electricity within the unit interval Pressure value relatively after growth rate be less than predetermined threshold, it is determined that have resistance interruption in pre-charge resistance matrix, if the 3rd Growth rate of the magnitude of voltage within the unit interval is higher than predetermined threshold, it is determined that have resistive short in pre-charge resistance matrix.

Specifically, control negative pole relay K2, pre-charge-relay K3 and positive pole relay K4 in controller to close successively After conjunction, the third voltage value that can be detected by relatively more current tertiary voltage table, with pre-charge resistance matrix just The growth pattern of third voltage value is determining the state of pre-charge resistance array in the case of often.When third voltage value increases Rate less than pre-charge resistance array under normal circumstances the growth rate of third voltage value when, determine in pre-charge resistance matrix There is resistance interruption, when third voltage value growth rate is higher than the increasing of pre-charge resistance array third voltage value under normal circumstances During long rate, determine in pre-charge resistance matrix there is resistive short.

Specifically, judge whether the state in connecting can also be by status information mark come really positive pole relay K4 Fixed, as shown in figure 4, the feedback of status end F access controllers of positive pole relay K4, controller can be anti-by state The signal that feedback end D sends is high level or low level determining positive pole relay K4 in an ON state or disconnect shape State.

It should be noted that according to the rate of change of third voltage value in pre-charge process, it can be determined that pre-charge resistance The state of each pre-charge resistance in matrix, is the offering convenience property of fault diagnosis of car load, it is ensured that the safety fortune of car load OK.

Alternatively, in the case of it is determined that having resistance interruption or short circuit in pre-charge resistance matrix, if not breaking or short The resistance set on road meets the resistor power of high-pressure system, control positive pole relay closure.

From such scheme, in a kind of optional scheme, it is determined that have in pre-charge resistance matrix resistance interruption or In the case of short circuit, the not resistance set of open circuit or short circuit meets the resistor power of high-pressure system, then controller sends control The instruction of positive pole relay K4 closures processed so that positive pole relay K4 is connected.

Specifically, in the case of having resistance interruption or short circuit in pre-charge resistance matrix, pre-charge resistance matrix not shadow Ring car load on high-pressure system operation, when there is no short circuit rush of current or open circuit when car load cannot go up electricity, The driving function of car load is ensured.

Embodiment two

According to embodiments of the present invention, there is provided a kind of embodiment of the method for the high-pressure system of detection electric automobile, need Illustrate, can be in the department of computer science of such as one group of computer executable instructions the step of the flow process of accompanying drawing is illustrated Perform in system, and, although show logical order in flow charts, but in some cases, can be with difference Shown or described step is performed in order herein.

Understand that the high-pressure system of the electric automobile in the application embodiment of the method can include with reference to Fig. 3 and Fig. 4：It is dynamic Power battery circuit, the electrokinetic cell circuit can include electrokinetic cell and negative pole relay K2, negative pole relay K2's First end is connected to the negative pole of electrokinetic cell；With the pre-charge circuit of electrokinetic cell circuit connected in series, pre-charge circuit includes： Pre-charge-relay K3 in parallel with positive pole relay K4 and pre-charge resistance matrix, pre-charge-relay K3 and preliminary filling Electric resistor matrix series connection, pre-charge resistance matrix includes multiple pre-charge resistances；Respectively with positive pole relay K4, negative pole The controller of relay K2 and pre-charge-relay K3, based on above-mentioned high-pressure system, the application detection electric automobile The method of high-pressure system may include steps of：

Step S102, controller is controlling negative pole relay K2, pre-charge-relay K3 and positive pole relay K4 successively It is upper electric safely using pre-charge resistance matrix majorization high-pressure system after connection, wherein, pre-charge resistance matrix includes Multiple pre-charge resistances.

Specifically, controller noted above can be battery management system can also be entire car controller and other can be used for The equipment for controlling above-mentioned relay.

Alternatively, above-mentioned pre-charge resistance matrix can include：N group pre-charge resistance set, every group of pre-charge resistance Set is connected in parallel, and every group of pre-charge resistance set includes at least one pre-charge resistance, in any one group of precharge electricity In the case that resistance set includes multiple pre-charge resistances, each the pre-charge resistance series connection included in pre-charge resistance set Connection.

Also, it should be noted that controller is by control negative pole relay K2, pre-charge-relay K3 and positive pole relay Device K4 is in turn switched on, and by delay of the pre-charge resistance matrix to electric current, during making system electrification, electric current is with preliminary filling The increase electric current of electric time gradually increases, it is to avoid rush of current during system electrification to each part in system.

The embodiment of the present application is included by above-mentioned high-pressure system：Electrokinetic cell circuit, including electrokinetic cell and negative pole relay The first end of device K2, negative pole relay K2 is connected to the negative pole of electrokinetic cell；With the preliminary filling of electrokinetic cell circuit connected in series Circuit, pre-charge circuit includes：Pre-charge-relay K3 in parallel with positive pole relay K4 and pre-charge resistance square Battle array, pre-charge-relay K3 is connected with pre-charge resistance matrix, and pre-charge resistance matrix includes multiple pre-charge resistances； Respectively with the controller of positive pole relay K4, negative pole relay K2 and pre-charge-relay K3, controller is negative in control After pole relay K2, pre-charge-relay K3 and positive pole relay K4 are in turn switched on, using pre-charge resistance matrix Control high-pressure system is upper electric safely.Solve in the case of the short circuit of single pre-charge resistance, close pre-charge-relay There is the technical problem of dash current in moment.

Alternatively, the system also includes：The first voltage table in parallel with electrokinetic cell, for detecting the of electrokinetic cell One magnitude of voltage；Second voltage table, the first end of second voltage table accesses pre-charge-relay K3 and pre-charge resistance matrix Between node, the second end is connected with second end of negative pole relay K2, for detecting the second voltage of pre-charge resistance Value；Tertiary voltage table, it is in parallel with high-voltage load, for detecting the third voltage value at high-voltage load two ends.Wherein, exist In the scheme that above-described embodiment is provided, can also include the example that step is constituted is implemented as follows：

Step S1021, controller control negative pole relay K2, pre-charge-relay K3 and positive pole relay K4 according to During secondary connection, read the electrokinetic cell for detecting first voltage value, detect the second of pre-charge resistance Magnitude of voltage and the third voltage value at the high-voltage load two ends for detecting.

Step S1022, controller according to detection obtain first voltage value, second voltage value, third voltage value and The device-identification information of the negative pole relay K2 that controller reads, control high-pressure system is upper electric safely.

Alternatively, step S1022, it is first voltage value that controller is obtained according to detection, second voltage value, the 3rd electric The device-identification information of the negative pole relay K2 that pressure value and controller read, safely upper electricity includes control high-pressure system Following steps：

Step S10221, controller controls the inspection switch closure inside electrokinetic cell after the completion of power-up initializing.

Step S10222, if the first voltage value for reading is less than predeterminated voltage, controller determines control inspection switch Closure failure, and control the upper electricity of high-pressure system interruption.

Step S10223, if the first voltage value for reading is more than or equal to predeterminated voltage, controller reads negative pole relay The device-identification information of device, if the device-identification information of the negative pole relay for reading meets the default first default bar Part, controller determines the closure success of control inspection switch and negative pole relay is in an ON state, and controls high-pressure system Electricity in interruption, otherwise, it determines control inspection switch closes success and negative pole relay is off.

From above-mentioned steps provide scheme, in a kind of optional scheme, controller control positive pole relay, Negative pole relay and pre-charge-relay disconnect, and after inspection switch closure, first voltage value are read, if read First voltage value be less than predeterminated voltage, it is determined that control inspection switch closure failure, then control high-pressure system and interrupt upper electricity； If the first voltage value for reading is more than or equal to predeterminated voltage, the device-identification information of negative pole relay K2 is read, If the device-identification information of the negative pole relay K2 for reading meets default first pre-conditioned, it is determined that control maintenance Switch K1 closes success and negative pole relay K2 controls in an ON state, then high-pressure system and interrupts upper electricity, otherwise, It is determined that control inspection switch K1 closes success and negative pole relay K2 is off.

Alternatively, in step S10223, it is determined that control inspection switch closes success and negative pole relay is off Afterwards, the method also includes：

Step S1023, controller control negative pole relay closure.

Step S1024, controller reads the device-identification information of negative pole relay.

Step S1025, if the device-identification information of the negative pole relay for reading is unsatisfactory for the first pre-conditioned, control Device processed determines the relay closure failure of control negative pole, and controls the upper electricity of high-pressure system interruption, otherwise, it determines control maintenance Switch is closed successfully and controls negative pole relay and closes successfully.

The scheme provided from above-mentioned steps, in a kind of optional scheme, it is determined that control inspection switch K1 closures In the case that success and negative pole relay K2 are off, controller sends control negative pole relay K2 closures Instruction, now reads the device-identification information of negative pole relay K2, if the state of the negative pole relay K2 for reading Identification information be unsatisfactory for it is first pre-conditioned, it is determined that the K2 closure failures of control negative pole relay, then control in high-pressure system Disconnected upper electricity, otherwise, it determines control inspection switch K1 is closed successfully and controlled negative pole relay K2 closing successfully.

Alternatively, in step S1025, it is determined that after the relay closure success of control negative pole, the method also includes：

Step S1026, controller reads first voltage value and second voltage value.

Step S1027, if the first voltage value for reading is in preset range, really with the difference of second voltage value Surely control inspection switch close successfully, the closure success of control negative pole relay and detect pre-charge-relay and be in connection State, controller control high-pressure system interrupts upper electricity, otherwise, it determines control inspection switch close successfully, control negative pole Relay closes success and detects pre-charge-relay and is off.

The scheme provided from above-mentioned steps, in a kind of optional scheme, it is determined that control negative pole relay K2 In the case of closure success, first voltage value and second voltage value are read, if the first voltage value and second for reading The difference of magnitude of voltage determines that inspection switch K1 is in closure state, negative pole relay K2 in preset range On-state and pre-charge-relay K3 is in an ON state, then control high-pressure system and interrupt upper electricity, otherwise, it determines control Inspection switch K1 processed close successfully, control negative pole relay K2 connects success and pre-charge-relay K3 is in disconnecting shape State.

Alternatively, in step S1027, it is determined that control inspection switch close successfully, control negative pole relay close successfully And detect after pre-charge-relay is off, the method also includes：

Step S1028, controller control pre-charge-relay closure.

Step S1029, controller reads first voltage value and second voltage value.

Step S10210, if the first voltage value for reading is not equal to zero and second voltage value is zero, it is determined that control is pre- Charge relay closure failure, controller control high-pressure system interrupts upper electricity, otherwise, if the first voltage for reading Value with the difference of second voltage value in preset range, it is determined that control inspection switch close successfully, control negative pole relay Device is closed successfully and controls pre-charge-relay and closes successfully.

The scheme provided from above-mentioned steps, in a kind of optional scheme, it is determined that control inspection switch K1 closures In the case that success, control negative pole relay K2 connection successes and pre-charge-relay K3 are off, now First voltage value and second voltage value are read, if the first voltage value for reading is not equal to zero and second voltage value is zero, It is determined that control pre-charge-relay K3 disconnects successfully, then control high-pressure system and interrupt upper electricity, otherwise, if read The difference of first voltage value and second voltage value in preset range, it is determined that control inspection switch K1 close successfully, control Negative pole relay K2 processed is connected successfully and is controlled pre-charge-relay K3 and closes successfully.

Alternatively, in step S10210, it is determined that control inspection switch close successfully, control negative pole relay close successfully And detect after pre-charge-relay is off, said method also includes：

Step S10211, controller control pre-charge-relay closure.

Step S10212, controller reads the device-identification information of pre-charge-relay；Wherein, if what is read is pre- The device-identification information of charge relay be unsatisfactory for it is second pre-conditioned, it is determined that control pre-charge-relay closure failure, Controller control high-pressure system interrupts upper electricity.

Step S10213, if the device-identification information satisfaction second of the pre-charge-relay for reading is pre-conditioned, really Surely control inspection switch close successfully, control negative pole relay connect successfully and control pre-charge-relay close successfully.

The scheme provided from above-mentioned steps, in a kind of optional scheme, it is determined that control inspection switch K1 closures In the case that success, control negative pole relay K2 connection successes and pre-charge-relay K3 are off, control Device sends the instruction of control pre-charge-relay K3 closure, now reads the device-identification information of pre-charge-relay K3, If the device-identification information of pre-charge-relay K3 for reading be unsatisfactory for it is second pre-conditioned, it is determined that control precharge Relay K3 closure failures, then control high-pressure system and interrupt upper electricity, otherwise, if the pre-charge-relay for reading The device-identification information of K3 meets second pre-conditioned, it is determined that control inspection switch K1 close successfully, control negative pole after Electrical equipment K2 is connected successfully and is controlled pre-charge-relay K3 and closes successfully.

Alternatively, in step S10213, it is determined that control inspection switch close successfully, control negative pole relay connect successfully And control after pre-charge-relay closure success, said method also includes：

Step S10214, controller reads real-time detection to third voltage value.

Step S10215, controller is compared third voltage value with the safe voltage value for prestoring.

Step S10216, if the growth rate after third voltage value compares with safe voltage value within the unit interval is less than pre- Threshold value is determined, controller determines in pre-charge resistance matrix there is resistance interruption, if third voltage value is within the unit interval Growth rate is higher than predetermined threshold, and controller determines in pre-charge resistance matrix there is resistive short.

The scheme provided from above-mentioned steps, in a kind of optional scheme, it is determined that control inspection switch K1 closures Success, control negative pole relay K2 are connected successfully and in the case of control pre-charge-relay K3 closure success, are read Real-time detection is compared third voltage value with the safe voltage value for prestoring to third voltage value, if in unit Growth rate after third voltage value compares with safe voltage value in time is less than predetermined threshold, it is determined that pre-charge resistance square There is resistance interruption in battle array, if growth rate of the third voltage value within the unit interval is higher than predetermined threshold, it is determined that preliminary filling There is resistive short in electric resistor matrix.

Alternatively, the method also includes：

Step S10217, in the case of it is determined that having resistance interruption or short circuit in pre-charge resistance matrix, if controller The resistance set for detecting not open circuit or short circuit meets the resistor power of high-pressure system, then control positive pole relay closure, So that positive pole relay is connected.

The scheme provided from above-mentioned steps, in a kind of optional scheme, it is determined that having in pre-charge resistance matrix In the case of resistance interruption or short circuit, the not resistance set of open circuit or short circuit meets the resistor power of high-pressure system, then control Device processed sends the instruction of control positive pole relay K4 closures so that positive pole relay K4 is connected.

Embodiment three

According to embodiments of the present invention, there is provided a kind of pre-charge circuit, the pre-charge circuit can be arranged on such as Fig. 4 institutes Between the electrokinetic cell circuit of the high-pressure system shown and high-voltage load, the pre-charge circuit can include：

First sub- pre-charge circuit, including：Positive pole relay K4.

Second sub- pre-charge circuit, it is in parallel with the first sub- pre-charge circuit, including：The pre-charge-relay being connected in series K3 and pre-charge resistance matrix, pre-charge resistance matrix includes multiple pre-charge resistances.

The embodiment of the present application arranges the pre-charge resistance being made up of multiple pre-charge resistances by above-mentioned in pre-charge circuit Matrix come realize single pre-charge resistance short circuit in the case of, closure pre-charge-relay moment there is dash current Technical problem.

Example IV

According to embodiments of the present invention, there is provided any one in a kind of electric automobile, including above-described embodiment one is electronic The high-pressure system of automobile.

Herein it should be noted that the electric automobile that the application is provided includes the electric automobile provided in above-described embodiment one High-pressure system each preferably, optional embodiment, but be not limited to the embodiment that embodiment one is provided.

Embodiment five

According to embodiments of the present invention, there is provided any one preliminary filling in a kind of electric automobile, including above-described embodiment three Circuit.

Herein it should be noted that the electric automobile that the application is provided includes the precharge electricity provided in above-described embodiment three Road each preferably, optional embodiment, but be not limited to the embodiment that embodiment three is provided.

The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.

In the above embodiment of the present invention, the description to each embodiment all emphasizes particularly on different fields, and does not have in certain embodiment The part of detailed description, may refer to the associated description of other embodiment.

In several embodiments provided herein, it should be understood that disclosed technology contents, other can be passed through Mode realize.Wherein, device embodiment described above is only schematic, such as division of described unit, Can be a kind of division of logic function, can there is other dividing mode, such as multiple units or component when actually realizing Can with reference to or be desirably integrated into another system, or some features can be ignored, or not perform.It is another, institute The coupling each other for showing or discussing or direct-coupling or communication connection can be by some interfaces, unit or mould The INDIRECT COUPLING of block or communication connection, can be electrical or other forms.

The unit as separating component explanation can be or may not be it is physically separate, it is aobvious as unit The part for showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to On multiple units.Some or all of unit therein can be according to the actual needs selected to realize this embodiment scheme Purpose.

In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to It is that unit is individually physically present, it is also possible to which two or more units are integrated in a unit.It is above-mentioned integrated Unit both can be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.

If the integrated unit is realized and as independent production marketing or when using using in the form of SFU software functional unit, During a computer read/write memory medium can be stored in.Based on such understanding, technical scheme essence On all or part of prior art is contributed part in other words or the technical scheme can be with software product Form is embodied, and the computer software product is stored in a storage medium, including some instructions are used so that one Platform computer equipment (can be personal computer, server or network equipment etc.) performs each embodiment institute of the invention State all or part of step of method.And aforesaid storage medium includes：USB flash disk, read-only storage (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), portable hard drive, magnetic disc or CD Etc. it is various can be with the medium of store program codes.

The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improve and moisten Decorations also should be regarded as protection scope of the present invention.

Claims

1. a kind of high-pressure system of electric automobile, it is characterised in that include：

Electrokinetic cell circuit, including electrokinetic cell and negative pole relay, the first end connection of the negative pole relay In the negative pole of the electrokinetic cell；

With the pre-charge circuit of the electrokinetic cell circuit connected in series, the pre-charge circuit includes：With positive pole relay Device pre-charge-relay in parallel and pre-charge resistance matrix, the pre-charge-relay and the pre-charge resistance Matrix is connected, and the pre-charge resistance matrix includes multiple pre-charge resistances；

Controller, is connected respectively with the positive pole relay, the negative pole relay and the pre-charge-relay, After in turn switching in the control negative pole relay, the pre-charge-relay and the positive pole relay, It is upper electric safely using high-pressure system described in the pre-charge resistance matrix majorization.

2. system according to claim 1, it is characterised in that the pre-charge resistance matrix includes：N group preliminary fillings Resistance set, every group of pre-charge resistance set is connected in parallel, and every group of pre-charge resistance set is included at least One pre-charge resistance, in the case where any one group of pre-charge resistance set includes multiple pre-charge resistances, institute State each pre-charge resistance included in pre-charge resistance set to be connected in series.

3. system according to claim 1 and 2, it is characterised in that the system also includes：

First voltage table, it is in parallel with the electrokinetic cell, for detecting the first voltage value of the electrokinetic cell；

Second voltage table, the first end of the second voltage table accesses the pre-charge-relay and the precharge Node between resistor matrix, the second end is connected with the second end of the negative pole relay, described pre- for detecting The second voltage value of charging resistor；

Tertiary voltage table, it is in parallel with high-voltage load, for detecting the third voltage value at the high-voltage load two ends；

The controller be additionally operable to control the negative pole relay, the pre-charge-relay and the positive pole after During electrical equipment is in turn switched on, according to the first voltage value, the second voltage value and institute that detection is obtained Third voltage value is stated, the high-pressure system upper electricity safely is controlled.

4. system according to claim 3, it is characterised in that

The controller is additionally operable to after the completion of power-up initializing, controls the inspection switch inside the electrokinetic cell Closure, wherein, if controlling the inspection switch closure failure, control the high-pressure system and interrupt upper electricity；

The controller is additionally operable to close successful and described negative pole relay in connection in the control inspection switch In the case of state, control the high-pressure system and interrupt upper electricity.

5. system according to claim 4, it is characterised in that

The controller is additionally operable to be in it is determined that controlling the inspection switch and closing successful and described negative pole relay In the case of off-state, the negative pole relay closure is controlled, wherein, if controlling the negative pole relay Closure failure, then control the high-pressure system and interrupt upper electricity.

6. system according to claim 5, it is characterised in that

If the controller be additionally operable to control the negative pole relay closure is successful and the pre-charge-relay at In the case of on-state, control the high-pressure system and interrupt upper electricity.

7. system according to claim 6, it is characterised in that

The controller be additionally operable to control the inspection switch close successfully, the control negative pole relay closes In the case that successful and described pre-charge-relay is off, the pre-charge-relay closure is controlled, Wherein, if controlling the pre-charge-relay closure failure, control the high-pressure system and interrupt upper electricity.

8. it is a kind of detection electric automobile high-pressure system method, it is characterised in that include：

Control in controller negative pole relay in the high-pressure system, pre-charge-relay and positive pole relay according to It is upper electric safely using high-pressure system described in the pre-charge resistance matrix majorization after secondary connection, wherein, it is described Pre-charge resistance matrix includes multiple pre-charge resistances.

9. method according to claim 8, it is characterised in that

The controller control the negative pole relay, the pre-charge-relay and the positive pole relay according to During secondary connection, the first voltage value of the electrokinetic cell that reading is detected, the precharge for detecting electricity The second voltage value of resistance and the third voltage value at the high-voltage load two ends for detecting；

It is the first voltage value that the controller is obtained according to detection, the second voltage value, the described 3rd electric The device-identification information of pressure value and the negative pole relay for reading, controls the high-pressure system upper electricity safely.

10. method according to claim 9, it is characterised in that the controller obtained according to detection described first The state of magnitude of voltage, the second voltage value, the third voltage value and the negative pole relay for reading Identification information, safely upper electric step includes to control the high-pressure system：

The controller controls the inspection switch closure inside the electrokinetic cell after the completion of power-up initializing；

Wherein, if the first voltage value for reading is less than predeterminated voltage, the controller determines control institute Inspection switch closure failure is stated, and controls the high-pressure system and interrupt upper electricity；

If the first voltage value for reading is more than or equal to the predeterminated voltage, the controller reads described The device-identification information of negative pole relay, if the device-identification information of the negative pole relay for reading meets Default first is pre-conditioned, the controller determine that the control inspection switch closure is successful and the negative pole after Electrical equipment in an ON state, and controls the upper electricity of the high-pressure system interruption, otherwise, it determines the control maintenance is opened Close synthesis work(and the negative pole relay is off.

11. methods according to claim 10, it is characterised in that it is determined that control the inspection switch close successfully and After the negative pole relay is off, methods described also includes：

The controller controls the negative pole relay closure；

The controller reads the device-identification information of the negative pole relay；Wherein,

If the device-identification information of the negative pole relay for reading is unsatisfactory for the described first pre-conditioned, institute State controller and determine the control negative pole relay closure failure, and control the high-pressure system and interrupt upper electricity, it is no Then, it is determined that controlling the inspection switch and closing successfully and control the negative pole relay to close successfully.

12. methods according to claim 11, it is characterised in that closing successfully it is determined that controlling the negative pole relay Afterwards, methods described also includes：

The controller reads the first voltage value and the second voltage value；Wherein,

If the first voltage value for reading is in preset range, really with the difference of the second voltage value Surely control the inspection switch close successfully, control negative pole relay closure success and detect the preliminary filling In an ON state, the controller controls the high-pressure system and interrupts upper electricity electrical relay, otherwise, it determines control Make the inspection switch close successfully, control negative pole relay closure success and detect the precharge after Electrical equipment is off.

13. methods according to claim 12, it is characterised in that it is determined that control the inspection switch close successfully, Control negative pole relay closure success and detect after the pre-charge-relay is off, institute Stating method also includes：

The controller controls the pre-charge-relay closure；

If the first voltage value for reading is not equal to zero and the second voltage value is zero, it is determined that control institute Pre-charge-relay closure failure is stated, the controller controls the high-pressure system and interrupts upper electricity, otherwise, if The first voltage value for reading is in the preset range with the difference of the second voltage value, it is determined that control Make the inspection switch close successfully, control the negative pole relay and close successfully and the control precharge relay Device is closed successfully.

14. methods according to claim 12, it is characterised in that it is determined that control the inspection switch close successfully, Control negative pole relay closure success and detect after the pre-charge-relay is off, institute Stating method also includes：

The controller controls the pre-charge-relay closure；

The controller reads the device-identification information of the pre-charge-relay；Wherein,

If the device-identification information of the pre-charge-relay for reading be unsatisfactory for it is second pre-conditioned, it is determined that The pre-charge-relay closure failure is controlled, the controller controls the high-pressure system and interrupts upper electricity；

If the device-identification information of the pre-charge-relay for reading meets described second pre-conditioned, really Surely control the inspection switch close successfully, control the negative pole relay and connect successfully and the control precharge Relay is closed successfully.

15. methods according to claim 13 or 14, it is characterised in that it is determined that controlling the inspection switch closure Success, the control negative pole relay are connected successfully and controlled after the pre-charge-relay closure success, institute Stating method also includes：

The controller reads real-time detection to the third voltage value；

The controller is compared the third voltage value with the safe voltage value for prestoring；Wherein,

If the growth rate after the third voltage value compares with the safe voltage value within the unit interval is less than pre- Threshold value is determined, the controller determines in the pre-charge resistance matrix there is resistance interruption, if the tertiary voltage Growth rate of the value within the unit interval is higher than the predetermined threshold, and the controller determines the pre-charge resistance square There is resistive short in battle array.

16. methods according to claim 15, it is characterised in that it is determined that having resistance in the pre-charge resistance matrix In the case of open circuit or short circuit, if the controller detects the resistance set of not open circuit or short circuit and meets described The resistor power of high-pressure system, then control the positive pole relay closure so that the positive pole relay is connected.

17. a kind of pre-charge circuits, it is characterised in that be arranged between electrokinetic cell circuit and high-voltage load, the preliminary filling Circuit includes：

First sub- pre-charge circuit, including：Positive pole relay；

Second sub- pre-charge circuit, it is in parallel with the described first sub- pre-charge circuit, including：The preliminary filling being connected in series Electrical relay and pre-charge resistance matrix, the pre-charge resistance matrix includes multiple pre-charge resistances.

18. pre-charge circuits according to claim 17, it is characterised in that the pre-charge resistance matrix includes：N Group pre-charge resistance set, every group of pre-charge resistance set is connected in parallel, every group of pre-charge resistance set bag At least one pre-charge resistance is included, in any one group of pre-charge resistance set the situation of multiple pre-charge resistances is included Under, each pre-charge resistance included in the pre-charge resistance set is connected in series.

19. a kind of electric automobiles, it is characterised in that include：High-pressure system in claim 1 to 7 described in any one.

20. a kind of electric automobiles, it is characterised in that include：Pre-charge circuit described in claim 17 or 18.