CN114475339A

CN114475339A - Common direct current bus new energy power battery detection device and working method thereof

Info

Publication number: CN114475339A
Application number: CN202210018634.4A
Authority: CN
Inventors: 田冠男
Original assignee: Hongyun New Energy Technology Tianjin Co ltd
Current assignee: Hongyun New Energy Technology Tianjin Co ltd
Priority date: 2022-01-08
Filing date: 2022-01-08
Publication date: 2022-05-13
Anticipated expiration: 2042-01-08
Also published as: CN114475339B

Abstract

The purpose of the present invention is to provide a common DC bus new energy power battery detection device and its working method, characterized in that it includes a chassis, a charging and discharging machine, a communication module, a charging and discharging interface, a charging gun, a charging and discharging wiring harness, and a lower computer module. , the lower computer interface, the lower computer wiring harness, the equalizer, the equalizer interface and the equalizer wiring harness; the whole set of equipment is easy to operate, and can perform three-electricity testing on the vehicle without disassembling the vehicle battery pack, and get the vehicle information at the first time. A customized maintenance plan is developed, and the bidirectional characteristics of power facilities are used to meet the unidirectional and bidirectional needs of the load. It has high-precision energy feedback, and is processed through a common DC bus-type DC power supply to meet users' needs for power battery packs, modules and various For DC loads, the power can be transmitted from the load to the load, and the load power can also be directly fed back to the power grid, which reduces the energy loss caused by discharge, and cooperates with the balancing instrument to achieve overall voltage consistency and improve battery life.

Description

Common direct-current bus new energy power battery detection device and working method thereof

Technical Field

The invention relates to the field of new energy power battery detection, in particular to a common direct current bus new energy power battery detection device and a working method thereof.

Background

Compared with the increasingly huge new energy automobile market, the construction of the after-sale market of the new energy automobile is obviously lagged, most of the existing automobile after-sale systems are still built on the basis of the regular maintenance and the maintenance of the traditional fuel oil automobile, the traditional fuel oil automobile has complex mechanical structures such as an engine, a gearbox and the like, and the after-sale maintenance mainly takes the regular replacement of an air filter element, engine lubricating oil, gearbox lubricating oil and the like; compared with the prior art, mechanical parts of the new energy automobile are only the motor and the reducer, the mechanical structure is greatly simplified, the maintenance requirement on the mechanical structure is greatly reduced, but the electrification degree of the new energy automobile is greatly improved, the detection and maintenance requirements on the power battery system and the electromechanical control system are greatly improved, and the requirements are also deficient in the current after-sale service system, so that the after-sale service experience of the new energy automobile is poor, and frequent complaints are usually caused by the fact that a user has no selectivity in a maintenance place and high cost, and maintenance equipment operated by after-sale service personnel has a single function and is complex to operate; in order to meet the energy saving requirement, some mechanisms or factories for detecting and maintaining new energy vehicles gradually appear on the market, the used equipment is not only a battery detector, a vehicle diagnostic instrument, a balancing instrument and the like, the functions of the equipment are very single, the operation is too complex, the learning cost of maintenance personnel is too high, when the new energy vehicle battery is detected, the whole vehicle battery pack needs to be disassembled, the operation is more complicated, the existing vehicle detecting instrument equipment can only detect problems of a certain brand or a certain model of vehicle and only supports the detection, the maintenance function cannot be realized, in addition, the currently used balancing instruments are all in a discharge type balancing mode, the battery packs with different voltages are discharged, the balancing is realized after the same voltage as that of the low voltage battery pack, and the energy consumption link of the whole commercial power grid is realized, the green energy-saving effect is not achieved; to sum up, a power battery detection device with more complete functionality needs to be developed to solve and avoid the problems and disadvantages encountered in the use process.

Disclosure of Invention

The invention aims to provide a method for detecting a new energy power battery, which can carry out three-way electric detection on a vehicle under the condition of not disassembling a vehicle battery PACK in the detection process of the new energy power battery, carry out real-time dynamic charge-discharge detection through a direct current charging gun interface, obtain accurate vehicle information at the first time, provide a customized maintenance scheme, utilize the bidirectional characteristic of an electric power facility, send and receive electric energy to meet the unidirectional and bidirectional requirements of a load, have high-precision energy feedback, carry out more test functions by processing a common direct current bus type direct current power supply, meet the requirements of users on power battery PACK, modules and various direct current loads, transmit the electric energy to the load, directly feed the load electric energy back to a power grid, have no power consumption of any resistance load in the feeding process, reduce energy loss caused by discharging, and be matched with a balancing instrument to charge a single PACK packet or a battery cell, The device has the advantages of balanced discharge, simple whole detection operation, complete functions and simple structure, and can achieve the aims of achieving the whole voltage consistency and prolonging the service life of the battery.

The technical scheme of the invention is as follows: the utility model provides a be total to direct current bus new forms of energy power battery detection device which characterized in that: the charging and discharging device comprises a case, a charging and discharging machine, a communication module, a charging and discharging interface, a charging gun, a charging and discharging wire harness, a lower computer module, a lower computer interface, a lower computer wire harness, a balancing instrument interface and a balancing instrument wire harness, wherein the charging and discharging machine is positioned in the case, the charging and discharging machine is fixedly connected with the case, the communication module is positioned in the case, the communication module is connected with the charging and discharging machine, the charging and discharging interface, the lower computer interface and the balancing instrument interface are all positioned on the same side of the case, the charging and discharging interface, the lower computer interface and the balancing instrument interface are fixedly connected with the case, the charging and discharging interface is connected with the charging and discharging machine by a circuit, the lower computer interface is connected with the lower computer module by a circuit, the balancing instrument interface is connected with the balancing instrument by a circuit, and the charging gun is positioned on one side of the outside the case, the utility model discloses a balance instrument, including charging gun, charge rifle, lower computer module, lower computer pencil, balancing instrument, the charging gun is swing joint with the quick-witted case, still be equipped with the cc1 port on the charging gun, the cc1 port is located one side of charging gun, the cc1 port is fixed connection with the charging gun, the charge-discharge pencil is located between charge-discharge interface and the charging gun, the one end and the charge-discharge interface of charge-discharge pencil are connected, the other end and the cc1 port on the charging gun of charge-discharge pencil are connected, lower computer module is located the inside of quick-witted case, lower computer module is connected with communication module, the lower computer pencil is located the outside of quick-witted case, lower computer pencil and lower computer interface connection, the balancing instrument is located the inside of quick-witted case, the balancing instrument pencil is connected with the charge-discharge machine, the balancing instrument pencil is located the outside of quick-witted case, balancing instrument pencil and balancing instrument interface connection.

Further, the charging and discharging machine is a tower-type inverter.

Further, the cc1 port is a charge and discharge communication port.

Further, the lower computer module is a vehicle diagnosis detector.

The working method comprises the following steps:

the whole set of equipment is exposed to three groups of wire harnesses, one group is a charging and discharging wire harness which is used for being connected to a charging and discharging machine and has the function of charging and discharging; the two groups are lower computer wire harnesses and are used for carrying out problem troubleshooting and detection on the new energy power battery; three groups of the balance instrument wire harnesses are used for quickly processing the unbalance problem of the vehicle battery; the specific detection steps are as follows:

step one, vehicle approach pretreatment: after a user vehicle enters a field, a worker firstly connects a charging gun and a lower computer wire harness with a battery of the vehicle to be detected at the same time;

step two, charging and discharging operation: after the charging gun is connected with the lower computer wire harness, a worker starts the whole detection device, namely, a charging and discharging machine in the case is started to perform charging and discharging dynamic processing on the vehicle, a cc1 port arranged on the charging gun is connected with a charging and discharging interface by the charging and discharging wire harness, and a cc1 port can issue and upload control instructions to monitor the charging and discharging state of the vehicle battery to be detected;

step three, detecting by a lower computer: when the second step is carried out, a worker determines the problem of the detected vehicle through a lower computer module, the lower computer module is installed under a panel of a communication module of the charge and discharge machine and can be accurate to the voltage of a single battery, various new energy vehicle types are integrated in the lower computer module, accurate vehicle information can be obtained at the first time, a customized maintenance scheme is given, equipment is used for detecting a three-electrical-system, and a single-battery-voltage detection function is added in a battery PACK detection scheme, so that the voltage problem of a single PACK or a single battery in the battery PACK can be accurately positioned;

step four, issuing a detection report: after the battery of the incoming vehicle is detected by the charging and discharging wire harness and the lower computer wire harness, the voltage problem of a single PACK or single battery in the battery PACK is determined, and fault detection reports are arranged one by one so that a worker and a vehicle owner can read and look up the fault detection reports conveniently;

step five, rapid equalization processing: the staff utilizes the equalizer pencil to be connected with waiting to detect the vehicle battery, can realize carrying out quick balanced processing to the unbalanced problem of battery, and the power supply of this equalizer is divided into two kinds of modes, mode one: the equalization instrument is connected with a charge and discharge machine in the case to supply power to the equalization instrument, and the mode II is as follows: the balancing instrument realizes power supply by utilizing an external auxiliary power supply, is more efficient, and can balance charging and discharging of a single PACK (PACK packaging) bag or a battery cell, so that the consistency of the whole voltage is achieved, the service life of the battery is prolonged, and the problem of the battery of a vehicle is repaired;

step six, negotiation is carried out aiming at the report: after all the detection is finished, the staff can make further maintenance operation or replacement suggestion by negotiating with the owner of the vehicle according to other three-electricity problems in the detection report.

The invention has the beneficial effects that: the multifunctional new energy power battery detection device is mainly used in the new energy power battery detection process, the detection operation of the whole set of equipment is simple, the functions are complete, the structure is simple, the vehicle can be detected in three electricity modes without disassembling the vehicle battery PACK, the real-time dynamic charging and discharging detection is carried out through the direct current charging gun interface, accurate vehicle information can be obtained at the first time, a customized maintenance scheme is given, the bidirectional characteristics of electric power facilities are utilized, electric energy can be sent and received, the unidirectional and bidirectional requirements of loads can be met, high-precision energy feedback is provided, more test functions can be carried out through processing by the common direct current bus type direct current power supply, the requirements of users on power battery PACKs, modules and various direct current loads can be met, the electric energy can be transmitted to the loads, the load electric energy can be directly fed back to a power grid, and no resistance power consumption exists in the feeding process, the energy loss that the discharge brought has been reduced, and the balanced instrument of cooperation can charge, discharge the equilibrium to monomer PACK package or battery electricity core to reach whole voltage uniformity, improve battery life.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a schematic view of the front structure inside the cabinet of the present invention.

Fig. 3 is a schematic view of the internal back structure of the cabinet of the present invention.

FIG. 4 is a schematic flow chart of the common DC bus circuit of the present invention.

FIG. 5 is a flow chart of energy cycle channel topology comparison of the present invention.

Fig. 6 is a flow chart of the performance test of the power battery according to the invention.

Wherein: 1. case 2, charge and discharge machine 3, communication module

4. Charging and discharging interface 5, charging gun 6, cc1 port

7. Charging and discharging wire harness 8, lower computer module 9 and lower computer interface

10. Lower computer wire harness 11, balancing instrument 12 and balancing instrument interface

13. Balancing instrument wire harness

Detailed Description

The following provides a brief description of embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, the common dc bus new energy power battery detection device is characterized in that: the charging and discharging machine comprises a case 1, a charging and discharging machine 2, a communication module 3, a charging and discharging interface 4, a charging gun 5, a charging and discharging wire harness 7, a lower computer module 8, a lower computer interface 9, a lower computer wire harness 10, a balancing instrument 11, a balancing instrument interface 12 and a balancing instrument wire harness 13, wherein the charging and discharging machine 2 is positioned in the case 1, the charging and discharging machine 2 is fixedly connected with the case 1, the communication module 3 is positioned in the case 1, the communication module 3 is connected with the charging and discharging machine 2, the charging and discharging interface 4, the lower computer interface 9 and the balancing instrument interface 12 are all positioned on the same side of the case 1, the charging and discharging interface 4, the lower computer interface 9 and the balancing instrument interface 12 are fixedly connected with the case 1, the charging and discharging interface 4 is connected with the charging and discharging machine 2 by a line, the lower computer interface 9 is connected with the lower computer module 8 by a line, the equalizing instrument interface 12 is connected with the equalizing instrument 11 by a circuit, the charging gun 5 is positioned on one side of the outside of the case 1, the charging gun 5 is movably connected with the case 1, a cc1 port 6 is further arranged on the charging gun 5, the cc1 port 6 is positioned on one side of the charging gun 5, the cc1 port 6 is fixedly connected with the charging gun 5, the charging and discharging wire harness 7 is positioned between the charging and discharging interface 4 and the charging gun 5, one end of the charging and discharging wire harness 7 is connected with the charging and discharging interface 4, the other end of the charging and discharging wire harness 7 is connected with the cc1 port 6 on the charging gun 5, the lower computer module 8 is positioned in the case 1, the lower computer module 8 is connected with the communication module 3, the lower computer wire harness 10 is positioned on the outside of the case 1, the lower computer wire harness 10 is connected with the lower computer interface 9, the equalizing instrument 11 is positioned in the inside of the case 1, the balancing instrument 11 is connected with the charge and discharge machine 2, the balancing instrument wiring harness 13 is located outside the case 1, and the balancing instrument wiring harness 13 is connected with the balancing instrument interface 12. The charge and discharge machine 2 is a tower-type inverter. The cc1 port 6 is a charge and discharge communication port. The lower computer module 8 is a vehicle diagnosis detector.

The working mode is as follows: the multifunctional new energy power battery detection device is mainly used in the new energy power battery detection process, and the whole set of equipment mainly comprises a case 1, a charge-discharge machine 2, a communication module 3, a charge-discharge interface 4, a charge gun 5, a charge-discharge wire harness 7, a lower computer module 8, a lower computer interface 9, a lower computer wire harness 10, a balancing instrument 11, a balancing instrument interface 12 and a balancing instrument wire harness 13, wherein the charge-discharge machine 2, the communication module 3, the lower computer module 8 and the balancing instrument 11 are all installed inside the case 1, the case 1 protects components and instruments, the charge-discharge machine 2 adopts a tower-type inverter and is mainly used for charge-discharge processing of batteries of a vehicle to be detected, and in addition, the charge-discharge interface 4, the lower computer interface 9 and the balancing instrument interface 12 are all located on the same side of the case 1 and are used for detecting connection of the wire harnesses; the whole set of equipment is exposed to three groups of wire harnesses, one group is a charging and discharging wire harness 7 which is used for being connected to the charging and discharging machine 2, and the whole charging and discharging wire harness 7 is integrated into the charging gun 5 and is used for charging and discharging; the two groups are lower computer wire bundles 10 which are used for carrying out problem troubleshooting and detection on the new energy power battery; three groups are balancing instrument wire harnesses 13 which are used for rapidly processing the unbalance problem of the vehicle battery; the specific detection steps are as follows:

step one, vehicle approach preprocessing: after the user vehicle enters the field, the staff first connects the charging gun 5 and the lower computer harness 10 with the battery of the vehicle to be detected simultaneously.

Step two, charging and discharging operation: after the charging gun 5 and the lower computer harness 10 are connected, a worker turns on the whole detection device, namely, the charging and discharging machine 2 in the case 1 is started to perform charging and discharging dynamic processing on the vehicle, the charging gun 5 is also provided with a cc1 port 6, the cc1 port 6 adopts a charging and discharging communication port, the charging and discharging communication port is connected with the charging and discharging interface 4 by using a charging and discharging harness 7, and the cc1 port 6 can issue and upload control commands to monitor the charging and discharging state of the vehicle battery to be detected.

Step three, detecting by a lower computer: and when the step two is carried out, a worker determines the problem of the detected vehicle through the lower computer module 8, the lower computer module 8 adopts a vehicle diagnosis detector, is arranged under the panel of the communication module 3 of the charge and discharge machine 2 and can be accurate to the voltage of the single battery, various new energy vehicle types are integrated in the lower computer module 8, accurate vehicle information can be obtained at the first time, a customized maintenance scheme is given, the equipment is added with a single voltage detection function in the detection of the three-electric system and the detection scheme of the battery PACK, and the voltage problem of the single PACK or the single battery in the battery PACK can be accurately positioned.

Step four, issuing a detection report: after the battery of the incoming vehicle is detected through the charging and discharging wire harness 7 and the lower computer wire harness 10, the voltage problem of a single PACK or single battery in the battery PACK is determined, and fault detection reports are arranged one by one so that a worker and a vehicle owner can read and look up the fault detection reports conveniently.

Step five, rapid equalization processing: the staff utilizes balanced appearance pencil 13 to be connected with waiting to detect the vehicle battery, can realize carrying out quick balanced processing to the unbalanced problem of battery, and the power supply of this balanced instrument 11 divide into two kinds of modes, mode one: the balancing instrument 11 is connected with the charge and discharge machine 2 inside the case 1 to supply power to the charging and discharge machine, and the mode two is as follows: the balancing instrument 11 utilizes an external auxiliary power supply to realize power supply, the external auxiliary power supply is a power supply module which provides stable low voltage for a basic control circuit, the starting control basic operation power supply equipment of the equipment can be understood, the equipment with the auxiliary power supply is generally supplied with power for the control circuit by the auxiliary power supply, and then the control circuit controls the main power supply to work, the auxiliary power supply generally does not exceed 24v, the power supply of the balancing instrument 11 in the equipment can be directly supplied with power by the auxiliary power supply, the balancing instrument is simpler and more efficient, the balancing instrument can charge and discharge a single PACK (PACK packaging and packaging) or a battery cell, thereby the consistency of the whole voltage is reached, the service life of the battery is prolonged, and the problem recovery is carried out on the battery of a vehicle.

Step six, negotiation is carried out aiming at the report: after all the detection is finished, the staff can make further maintenance operation or replacement suggestion by negotiating with the owner of the vehicle aiming at other three-electricity problems in the detection report.

In the operation process of the whole set of equipment, the bidirectional AC-DC and bidirectional DC-DC combination is adopted, and the internal circulation between the energy feed network or the channels is realized in a mode of sharing an internal direct current bus; the control and management of various complicated charging and discharging processes of a user are realized based on a 32-bit floating point DSP + ARM communication control platform; the whole system adopts the wide margin real-time power control of the Yingfei IGBT; the configuration mode of the complete system modular power unit ensures excellent electromagnetic compatibility characteristic and can meet the reliable use in various occasions; various communication modes such as CAN, RS-485, Ethernet and the like are provided for users to select, and the system CAN be in real-time data butt joint with a protection board, a BMS and the like.

Its battery detects the function and includes: 1. a battery pack cycle life test and an inter-channel cycle test; 2. testing the capacity of the battery pack; 3. battery charge/discharge characteristic test; 4. testing the charge retention capacity of the battery pack; 5. testing the charging/discharging efficiency of the battery pack; 6. testing the over-charge and over-discharge rate bearing capacity of the battery pack; 7. testing the temperature characteristic of the battery pack; 8. standard dynamic test of the battery pack; 9. testing the temperature of the battery pack; 10. testing the dynamic internal resistance of the battery pack; 11. a battery pack pulse charge-discharge test; 12. the remote test control platform is complete in function, supports various working condition tests on the storage battery pack, and supports multi-channel parallel operation; 13. the device can receive detection and control data uploaded by the charging and discharging assembly, the single battery voltage detection module and the temperature detection module, and store and analyze the data; 14. the system can visually display and record various real-time data, working condition running conditions, fault information and the like of the multi-path charging/discharging test equipment, and has strong data query, analysis and management functions; 15. the user may define the process control points for each stage, such as current, voltage, power, ampere-hour, temperature, time, etc.; 16. and issuing control parameters to the charge and discharge assembly strictly according to the process flow programmed by the user.

The energy management and control advantages of the whole set of equipment are as follows: firstly, the technology precipitation of a pure digital bidirectional converter is possessed, and the technology is stable and reliable; secondly, through an energy management and control strategy, the 6-level loss of energy flowing through a channel is reduced to 2 levels, and the 4-level energy loss is reduced; thirdly, wirelessly connecting a patent core power control unit, namely IGBT + absorption capacitor + busbar + support capacitor, ensuring the stability of the system and reducing the electromagnetic interference to the maximum extent; fourthly, the charging and discharging tests of the battery can be realized by flexibly configuring the charging and discharging power without taking power from a power grid through multi-channel free collocation; fifthly, the charging and discharging tests among the multi-channel test battery packs are realized at the bottommost layer of the energy consumption link; and sixthly, the upper computer displays the real-time power of multi-channel charging and discharging in real time, so that a user can conveniently adjust the test method and optimize an energy management strategy.

The common direct current bus setting parameters are divided into AC-DC alternating current parameters and DC-DC direct current parameters:

firstly, the technical parameters of the AC-DC alternating current side of the common direct current bus are as follows: rated voltage: 380V +/-10%; frequency: 50Hz +/-2 Hz; the power factor is more than or equal to 0.99; the current harmonic wave, THD for short is less than 5%, and the current harmonic wave is in a full-load state; and (3) alternating current input: three-phase five-wire, namely the grounding resistance is less than or equal to 5 omega; and (3) alternating current protection: undervoltage, overvoltage, overcurrent, open-phase, overload, frequency abnormity, overtemperature, communication overtime and anti-islanding effect.

Secondly, the technical parameters of the DC-DC side of the common DC bus are as follows: the number of direct current channels of each cabinet body is as follows: 4; single channel rated power: 40 kW; total power of the direct current channel: 160 kW; charge-discharge voltage range: charging 0V-400V and discharging 20V-400V; the energy feedback efficiency is more than or equal to 90 percent; the circulation efficiency among the channels is more than or equal to 97 percent; output voltage sampling resolution: 1 mV; single-channel rated current: +/-100A; parallel current: 400A; the voltage precision is less than or equal to +/-0.1% F.S.; the current precision is less than or equal to +/-0.1% F.S.; output current sampling resolution: 1 mA; the continuous sampling speed is less than or equal to 10 ms; the rising/falling time of the current is less than or equal to 30ms (10% Imax to 90% Imax), and no impact exists; the charging/discharging switching time is less than or equal to 60ms (-100% Imax to 100% Imax), and no impact exists; power resolution: 0.1 kW; protection mode of direct current channel: and multiple protection functions of power failure, overvoltage, overcurrent, short circuit, reverse connection (including RVS line reverse connection), phase failure, over-temperature, communication overtime and the like are performed on the load side.

For the collection of battery data, accomplish through the charging and discharging machine 2 of quick-witted incasement 1 inside, this charging and discharging machine 2 adopts tower inverter, cooperates communication module 3 and next quick-witted module 8 to accomplish, possesses following characteristics: 1. the precision is high: the voltage measurement precision is less than 1mV, the temperature measurement precision is less than 1 ℃, and the resistance simulates 1 ohm resolution; 2. the response is quick: updating a channel in 50ms, and communicating 500kps through the CAN; 3. the resistance board card can conveniently lead in a graduation table so as to adapt to the measurement and simulation of different NTCs; 4. easy maintenance: the modular design is adopted, the integration level is high, the maintenance is simple and easy, and the stability and the reliability are realized; 5. the power supply and the communication are both in a dual-port design, so that the cascade connection is easy, and the expansion of the multi-speed board card is convenient; 6. RS-485C and CAN communication mode, open protocol, do benefit to user's integration.

The application occasions of the whole set of equipment are divided into four contents: 1. acquiring, recording and analyzing the cell voltage and the temperature; 2. integrating a battery pack test system; 3. temperature simulation is used for BMS temperature detection function test; 4. other high-precision voltage and temperature measurement and recording occasions; in the high-precision voltage measurement, the voltage acquisition board provides 32CH voltage acquisition, the precision is less than 5mV, and the accuracy of internal resistance calculation is ensured on occasions needing to calculate the internal resistance of the battery; in temperature measurement, a temperature measurement plate provides 32CH temperature acquisition, NTC for short, and the precision is less than 1 ℃; in the temperature simulation, the temperature simulation board can output resistance values according to requirements by setting a resistor, simulate NTC output, have the resolution of 1 ohm and range from 1 ohm to 100M ohm, output by 6 paths, and a user can select two modes of resistor setting and temperature setting; in the process of leading the temperature board card into the NTC table, the temperature acquisition board and the temperature simulation board provide the NTC indexing table leading-in function so as to adapt to different NTC types, and the use is greatly convenient for users.

The detection operation of the whole set of equipment is simple, the functions are complete, the structure is simple, the three-way detection can be carried out on the vehicle under the condition that a vehicle battery PACK is not detached, the real-time dynamic charge-discharge detection is carried out through a direct-current charging gun interface, accurate vehicle information can be obtained at the first time, a customized maintenance scheme is given, the bidirectional characteristic of an electric power facility is utilized, electric energy can be sent and received to meet the unidirectional and bidirectional requirements of loads, high-precision energy feedback is achieved, the electric energy can be processed through a common direct-current bus type direct-current power supply to carry out more test functions, the requirements of users on power battery PACK, modules and various direct-current loads can be met, the electric energy can be transmitted to the loads, the load electric energy can be directly sent back to a power grid, no resistance load power consumption exists in the feeding process, the energy loss caused by discharging is reduced, and a single PACK or battery cell can be charged through the matching of a balancing instrument, The discharge is balanced so as to achieve the consistency of the whole voltage and prolong the service life of the battery.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", "end", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims

1. The utility model provides a be total to direct current bus new forms of energy power battery detection device which characterized in that: the charging and discharging device comprises a case, a charging and discharging machine, a communication module, a charging and discharging interface, a charging gun, a charging and discharging wire harness, a lower computer module, a lower computer interface, a lower computer wire harness, a balancing instrument interface and a balancing instrument wire harness, wherein the charging and discharging machine is positioned in the case, the charging and discharging machine is fixedly connected with the case, the communication module is positioned in the case, the communication module is connected with the charging and discharging machine, the charging and discharging interface, the lower computer interface and the balancing instrument interface are all positioned on the same side of the case, the charging and discharging interface, the lower computer interface and the balancing instrument interface are fixedly connected with the case, the charging and discharging interface is connected with the charging and discharging machine by a circuit, the lower computer interface is connected with the lower computer module by a circuit, the balancing instrument interface is connected with the balancing instrument by a circuit, and the charging gun is positioned on one side of the outside the case, the utility model discloses a balance instrument, including charging gun, charge rifle, lower computer module, lower computer pencil, balancing instrument, the charging gun is swing joint with the quick-witted case, still be equipped with the cc1 port on the charging gun, the cc1 port is located one side of charging gun, the cc1 port is fixed connection with the charging gun, the charge-discharge pencil is located between charge-discharge interface and the charging gun, the one end and the charge-discharge interface of charge-discharge pencil are connected, the other end and the cc1 port on the charging gun of charge-discharge pencil are connected, lower computer module is located the inside of quick-witted case, lower computer module is connected with communication module, the lower computer pencil is located the outside of quick-witted case, lower computer pencil and lower computer interface connection, the balancing instrument is located the inside of quick-witted case, the balancing instrument pencil is connected with the charge-discharge machine, the balancing instrument pencil is located the outside of quick-witted case, balancing instrument pencil and balancing instrument interface connection.

2. The device for detecting the new energy power battery with the common direct-current bus according to claim 1, is characterized in that: the charging and discharging machine is a tower type inverter.

3. The device for detecting the new energy power battery of the common direct current bus according to claim 1, is characterized in that: the cc1 port is a charge and discharge communication port.

4. The device for detecting the new energy power battery of the common direct current bus according to claim 1, is characterized in that: the lower computer module is a vehicle diagnosis detector.

5. The working method of the common direct current bus new energy power battery detection device according to the claims 1-4 comprises the following steps:

the whole set of equipment is exposed to form three groups of wire harnesses, wherein one group of wire harnesses is a charging and discharging wire harness which is used for being connected to a charging and discharging machine and is used for charging and discharging; the two groups are lower computer wire harnesses and are used for carrying out problem troubleshooting and detection on the new energy power battery; three groups of the balance instrument wire harnesses are used for quickly processing the unbalance problem of the vehicle battery; the specific detection steps are as follows:

step one, vehicle approach preprocessing: after a user vehicle enters a field, a worker firstly connects a charging gun and a lower computer wire harness with a battery of the vehicle to be detected at the same time;