CN216956293U - Power battery detection device - Google Patents
Power battery detection device Download PDFInfo
- Publication number
- CN216956293U CN216956293U CN202220305942.0U CN202220305942U CN216956293U CN 216956293 U CN216956293 U CN 216956293U CN 202220305942 U CN202220305942 U CN 202220305942U CN 216956293 U CN216956293 U CN 216956293U
- Authority
- CN
- China
- Prior art keywords
- switch
- interface
- negative
- power battery
- positive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The utility model discloses a power battery detection device, which comprises a power supply, a first switching device, a second switching device, a fault diagnosis device and a voltage detection device, wherein the power supply, the first switching device, the second switching device, the fault diagnosis device and the voltage detection device can be connected in a split mode through connecting wires; the first switch device is provided with a power supply interface used for being connected with a power supply and a power supply interface connected with a power battery; the fault diagnosis device is used for detecting a power supply parameter of the power battery when the first switch device is triggered to be closed; the second switch device is provided with a shell interface, a positive input interface, a negative input interface, an insulated output interface, a positive output interface and a negative output interface; the voltage detection device is also used for detecting the total voltage between the positive electrode and the negative electrode of the power battery, the first voltage between the insulated output interface and the positive electrode input interface and the second voltage between the insulated output interface and the negative electrode input interface through a second switch device; and then comparing the detection value with the standard value to judge whether the power battery is qualified. The utility model improves the convenience of power battery detection.
Description
Technical Field
The utility model relates to the field of power batteries, in particular to a power battery detection device.
Background
With the gradually stricter requirements on energy conservation and environmental protection, the development trend of new energy automobiles is further enhanced. The power battery is an important component of a new energy automobile, and determines the dynamic property and the safety of the automobile to a great extent. Therefore, after the power battery is assembled, the functions of the power battery must be strictly detected to ensure that the power battery can normally operate.
The function detection of the power battery generally comprises the function detection of a power battery management system, the electric safety function detection and the like. At present, most automobile host factories and power battery manufacturers adopt large-scale special detection equipment to detect power batteries, most of the equipment is integrated in cabinets, and the equipment occupies a large area and cannot be moved. If the power battery needs to be detected, the power battery to be detected needs to be transported to a place where large-scale professional detection equipment is located to carry out detection.
In addition, the industry also has power batteries in a trial production stage of small-batch production, and the placement place of the power batteries has uncertain factors, so the requirement on the portability of the inspection equipment is high, but the detection convenience of the power batteries in the trial production stage is poor due to the fact that large-sized special detection equipment cannot be moved.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a power battery detection device, and aims to provide a portable device for power battery detection, which improves the convenience of power battery detection.
In order to achieve the above object, the present invention provides a power battery detection device, including:
a power source;
a first switching device having a power interface and a power supply interface; the power supply interface is used for being connected with the power supply, and the power supply interface is used for being connected with a power battery;
the fault diagnosis device is connected with the power battery to detect a power supply parameter of the power battery when the first switch device is triggered to be closed;
a voltage detection device having a positive input terminal and a negative input terminal;
a second switching device having a housing interface, a positive input interface, a negative input interface, an insulated output interface, a positive output interface, and a negative output interface;
the positive input interface and the negative input interface are used for connecting the positive electrode and the negative electrode of the power battery in a one-to-one manner; the shell interface is used for connecting a shell of the power battery; the positive output interface, the negative output interface and the insulated output interface are respectively used for connecting a positive input end and a negative input end of the voltage detection device;
the voltage detection device is used for detecting the total battery voltage between the positive electrode and the negative electrode of the power battery, the first voltage between the insulated output interface and the positive electrode input interface and the second voltage between the insulated output interface and the negative electrode input interface through the second switch device when the first switch device is triggered to be closed.
Optionally, the first switching device includes a first switch and a second switch, and the power supply interface includes a first power supply interface and a second power supply interface;
the first end of the first switch is connected with the first end of the second switch, and the common end of the first switch and the first end of the second switch is connected with the power interface; the second end of the first switch is connected with a first power supply interface, and the second end of the second switch is connected with a second power supply interface;
the first power supply interface is used for being connected with a management system interface of the power battery;
and the second power supply interface is used for being connected with a relay interface of the power battery.
Optionally, the second switching device comprises a first resistor, a positive electrode switch, a second resistor and a negative electrode switch;
the positive pole change-over switch is provided with a first positive pole input end, a second positive pole input end, a first positive pole output end and a second positive pole output end; the first positive input end is connected with one end of the first resistor, and the second positive input end and the other end of the first resistor are respectively connected with the positive input interface; the first positive output end is connected with the shell interface and the insulation output interface respectively; the second positive electrode output end is connected with the positive electrode output interface;
the negative pole change-over switch is provided with a first negative pole input end, a second negative pole input end, a first negative pole output end and a second negative pole output end; the first negative input end is connected with one end of the second resistor, and the second negative input end and the other end of the second resistor are respectively connected with the negative input interface; the first negative output end is connected with the shell interface, and the second negative output end is connected with the negative output interface.
Optionally, the resistance value of the first resistor and the resistance value of the second resistor are both greater than 100k Ω.
Optionally, the positive pole switch comprises a third switch and a fourth switch; the input end of the third switch is a first input end of the anode change-over switch, and the input end of the fourth switch is a second input end of the anode change-over switch; the output end of the third switch is a first output end of the positive pole change-over switch, and the output end of the fourth switch is a second output end of the positive pole change-over switch;
the negative electrode change-over switch comprises a fifth switch and a sixth switch; the input end of the fifth switch is a first input end of the negative pole change-over switch, and the input end of the sixth switch is a second input end of the negative pole change-over switch; the output end of the fifth switch is a first output end of the negative pole change-over switch, and the output end of the sixth switch is a second output end of the negative pole change-over switch;
when the fourth switch and the sixth switch are closed, the voltage detection device is used for detecting the total battery voltage between the positive electrode and the negative electrode of the power battery; the voltage detection device is configured to detect the first voltage when the third switch and the fourth switch are closed; the voltage detection device is configured to detect the second voltage when the fifth switch and the sixth switch are closed.
Optionally, the fault diagnosis device is connected with a management system interface of the power battery through a detection wire harness;
the detection harness includes an OBD terminal and a communication line;
the OBD terminal is arranged at one end of the communication line and used for being correspondingly connected with the fault diagnosis device.
Optionally, the communication line is a CAN communication bus.
Optionally, the detection harness further comprises a termination resistor; the terminal resistor is arranged between the OBD terminal and the CAN communication bus.
Optionally, the voltage detection device is a multimeter; the red pen-shape metre link of universal meter does the anodal input of voltage detection device, the black pen-shape metre link of universal meter does the negative pole input of voltage detection device.
Optionally, the power supply is a 12V regulated power supply.
The utility model provides a power battery detection device, which comprises a power supply, a first switching device, a second switching device, a fault diagnosis device and a voltage detection device, wherein the power supply, the first switching device, the second switching device, the fault diagnosis device and the voltage detection device can be connected in a split mode through connecting wires; when the management system function of the power battery is detected, the first switch device is triggered to be closed, the management system of the power battery is electrified, and the fault diagnosis device detects the power supply parameter of the power battery through the management system; comparing the detected power supply parameter with the known standard power supply parameter, and judging whether the management system function of the power battery is qualified; when the electrical safety function of the power battery is detected, the first switch device is triggered to be closed, then a relay of the power battery is closed, so that the voltage detection device can respectively detect the total voltage of the battery between the anode and the cathode of the power battery, the first voltage between the insulation output interface and the anode input interface and the second voltage between the insulation output interface and the cathode input interface by controlling the second switch device, then the total voltage, the first voltage and the second voltage are compared with a standard value, and whether the electrical safety function of the power battery is qualified or not is judged. Therefore, the power battery can be detected by using the detachably connected equipment, the inconvenience that the power battery can only be detected at the fixed place where the large-scale special detection equipment is located in the prior art is overcome, and the convenience of power battery detection is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a block diagram of a power battery testing device according to an embodiment of the present invention;
FIG. 2 is a block diagram of another embodiment of the power battery testing device of the present invention;
FIG. 3 is a schematic diagram illustrating the principle of detecting the electrical safety function of the power battery;
fig. 4 is a schematic structural diagram of the embodiment of fig. 2.
The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
The reference numbers illustrate:
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
In the trial production stage of the power battery, the function of the battery management system needs to be detected before the battery assembly is taken off line, and the operations such as housing cover and the like are performed after the detection is qualified.
In view of this, the present invention provides a power battery detection apparatus, referring to fig. 1, in an embodiment, the power battery detection apparatus includes:
a power supply 10;
a first switching device 20, the first switching device 20 having a power supply interface and a power supply interface; the power supply interface is used for being connected with the power supply, and the power supply interface is used for being connected with a power battery;
a fault diagnosis device 30 for connecting with the power battery to detect the power supply parameter of the power battery when the first switch device 20 is triggered to close;
a voltage detection device 40 having a positive input terminal and a negative input terminal;
a second switching device 50, the second switching device 50 having a housing interface, a positive input interface, a negative input interface, an insulated output interface J1, a positive output interface J2, and a negative output interface J3;
the positive input interface and the negative input interface are used for connecting the positive electrode and the negative electrode of the power battery in a one-to-one manner; the shell interface is used for connecting a shell of the power battery; the positive output interface J2, the negative output interface J3 and the insulated output interface J1 are respectively used for connecting a positive input end and a negative input end of the voltage detection device 40;
the voltage detection device 40 is configured to detect, through the second switch device 50, a total battery voltage between a positive electrode and a negative electrode of the power battery, a first voltage between the insulated output interface J1 and the positive electrode input interface, and a second voltage between the insulated output interface J1 and the negative electrode input interface when the first switch device 20 is triggered to close.
The power battery detection device can be used for detecting the management system function and the electrical safety function of the power battery, the power battery is the power battery of a new energy automobile, and optionally, the power battery can be a lithium power battery pack.
The power supply parameters comprise fault codes, single voltage, total voltage, factory SOC (State of Charge), battery temperature and the like of the power battery. The Management System of the power Battery includes an ECU (Electronic Control Unit) and a BMS (Battery Management System) of the power Battery. After the first switching device 20 is closed, the ECU and the BMS of the power battery are powered on, and the fault diagnosis device 30 can detect the power supply parameters of the power battery through the ECU and the BMS and then compare the detection result with the standard power supply parameters of the power battery, thereby determining whether the management system function of the power battery is qualified.
It can be understood that, according to the requirements of safety and corresponding standards, the power battery of the new energy automobile must be isolated from the electrical system by a high-voltage direct-current relay, which can be reliably switched on and off according to the requirements to safely disconnect the main circuit of the battery. That is, when the relay is switched off, the voltage between the positive pole and the negative pole of the power battery is 0V; when the relay is closed, the voltage between the positive pole and the negative pole of the power battery is equal to the total voltage of the battery. Therefore, when the electrical safety function of the power battery is detected, the first switch device 20 is needed to apply the power supply 10 to the power battery assembly to control the relay to be closed, and the voltage between the positive pole and the negative pole of the power battery is detected to determine whether the relay responds correctly.
In this embodiment, when detecting the electrical safety function of the power battery, after the first switch device 20 is closed, the relay of the power battery is closed, the positive input interface and the negative input interface of the second switch device 50 are correspondingly connected to the positive electrode and the negative electrode of the power battery, and the positive output interface J2 and the negative output interface J3 of the second switch device 50 are correspondingly connected to the positive input end and the negative input end of the voltage detection device 40; controlling the second switch device 50 to make the positive output interface J2 and the positive input interface conductive, and the negative output interface J3 and the negative input interface conductive, so that the voltage detection device 40 can detect the total voltage between the positive electrode and the negative electrode of the power battery;
correspondingly connecting the positive input interface and the shell interface of the second switch device 50 with the positive electrode and the shell of the power battery, and correspondingly connecting the positive output interface J2 and the insulated output interface J1 of the second switch device 50 with the positive input end and the negative input end of the voltage detection device 40; controlling the second switching device 50 to turn on the positive output interface J2 and the positive input interface, so that the voltage detection device 40 can detect a first voltage between the insulated output interface J1 and the positive output interface J2;
correspondingly connecting a negative input interface and a shell interface of the second switch device 50 with a negative electrode and a shell of the power battery, and correspondingly connecting an insulated output interface J1 and a negative output interface J3 of the second switch device 50 with a positive input end and a negative input end of the voltage detection device 40; the second switching device 50 is controlled to turn on the negative output interface J3 and the negative input interface, so that the voltage detection device 40 can detect the second voltage between the insulated output interface J1 and the negative output interface J3. And comparing the detection result with the standard parameter ranges of the total voltage, the first voltage and the second voltage of the power battery, thereby judging whether the electrical safety function of the power battery is qualified.
The voltage detection device 40 may be a multimeter, an oscilloscope, a voltmeter, or the like, which can be used for detecting voltage.
As can be understood, since the power source 10, the first switching device 20, the second switching device 50, the fault diagnosis device 30 and the voltage detection device 40 in the power battery detection apparatus can be detachably connected by connection lines; when detecting the management system function of the power battery, the first switch device 20 is triggered to be closed, the management system of the power battery is powered on, and the fault diagnosis device 30 detects the power supply parameter of the power battery through the management system; comparing the detected power supply parameter with the known standard power supply parameter, and judging whether the management system function of the power battery is qualified; when the electrical safety function of the power battery is detected, the first switch device 20 is triggered to be closed, and then the relay of the power battery is closed, so that the voltage detection device 40 can detect the total battery voltage between the positive electrode and the negative electrode of the power battery, the first voltage between the insulated output interface J1 and the positive electrode input interface, and the second voltage between the insulated output interface J1 and the negative electrode input interface respectively by controlling the second switch device 50, and then the total voltage, the first voltage, and the second voltage are compared with the standard value to determine whether the electrical safety function of the power battery is qualified. Therefore, the power battery can be detected by using the detachably connected equipment, the inconvenience that the power battery can only be detected at the fixed place where the large-scale special detection equipment is located in the prior art is overcome, and the convenience of power battery detection is improved.
Further, referring to fig. 2, the second switch 50 device includes a first resistor R1, a positive switch 51, a second resistor R2, and a negative switch 52;
the positive pole change-over switch 51 has a first positive pole input end, a second positive pole input end, a first positive pole output end and a second positive pole output end; the first positive input end is connected with one end of the first resistor R1, and the second positive input end and the other end of the first resistor R1 are respectively connected with the positive input interface; the first positive output end is respectively connected with the shell interface and the insulated output interface J1; the second positive electrode output end is connected with the positive electrode output interface J1;
the negative pole selector switch 52 has a first negative pole input terminal, a second negative pole input terminal, a first negative pole output terminal, and a second negative pole output terminal; the first negative input end is connected with one end of the second resistor R2, and the second negative input end and the other end of the second resistor R2 are respectively connected with the negative input interface; the first negative output end is connected with the shell interface, and the second negative output end is connected with the negative output interface J3.
The voltage detection device 40 is configured to detect, through the second switch device 50, a total battery voltage between a positive electrode and a negative electrode of the power battery, a first voltage between the insulated output interface J1 and the positive electrode input interface, and a second voltage between the insulated output interface J1 and the negative electrode input interface when the first switch device 20 is triggered to close.
The method specifically comprises the following steps: a second positive input end of the positive electrode changeover switch 51 is controlled to be connected with a second positive output end, so that the positive output interface J2 is connected with the positive electrode of the power battery; the second negative electrode input end is connected with the second negative electrode output end, so that the negative electrode output interface J3 is connected with the negative electrode of the power battery, and the voltage detection device 40 can detect the total voltage between the positive electrode and the negative electrode of the power battery through the positive electrode output interface J2 and the negative electrode output interface J3;
a second positive output end of the positive changeover switch 51 is controlled to be connected with a second positive input end, so that the positive output interface J2 is connected with one end of the first resistor R1; a first positive output end of the positive electrode control switch 51 is connected with a first positive input end, so that the insulated output interface J1 is connected with the other end of the first resistor R1; furthermore, the voltage detection device 40 can detect a first voltage, namely, a voltage across the first resistor R1 through the positive output interface J2 and the insulated output interface J1;
controlling the second negative output end of the positive changeover switch 51 to be connected with the second negative input end, so that the negative output interface J3 is connected with one end of the second resistor R2; the first fususky output end of the positive electrode change-over switch 51 is controlled to be connected with the first negative electrode input end, so that the insulating output interface J1 is connected with the other end of the second resistor R2; further, the voltage detection device 40 can detect the second voltage, i.e., the voltage across the second resistor R2, through the negative output interface J3 and the insulated output interface J1.
It should be noted that the principle of detecting the electrical safety function of the power battery is as follows: referring to fig. 3, under the condition that the relay of the power battery is closed, the total voltage value between the positive electrode (i.e., total +) and the negative electrode (total-) of the power battery is Vo, the resistor R0 and the resistor Rm are respectively connected in series between the positive electrode and the outer shell of the power battery and between the negative electrode and the outer shell of the power battery, and the voltage values at the two ends of the two resistors are respectively detected, assuming that Vp and Vm are respectively provided.
Then positive extreme value of insulation resistance
Negative extreme value of insulation resistance
The insulation resistance value of the power battery should be R+And R-The insulation resistance value is obtained by the parallel connection value of (1):
according to the national standard, the insulation resistance of the electric automobile needs to meet the following requirements: r isfThe voltage is more than or equal to 100 omega/V, and the high-voltage system has no insulation fault at the moment; the insulation resistance value reaches more than 500 omega/V, and the insulation performance is good. Then, it can be found by inference and experiment that if Vm and Vp are both less than
The insulation resistance value of the power battery is larger than 10M omega, and the insulation performance is good.
Therefore, whether the relay of the power battery responds correctly or not can be judged according to the total voltage value, and then the detected first voltage and the detected second voltage are compared with the standard value, so that whether the electrical safety function of the power battery is qualified or not can be judged. The standard value can be specifically determined by combining the brand, model and the like of the power battery to be detected, and can be, for example
And Vo is the total voltage between the positive electrode and the negative electrode of the power battery.
The shell interface and the insulation output interface J1 can be combined into one interface or can be arranged into two interfaces so as to be convenient for testing, and can be arranged according to actual needs.
Further, the resistance value of the first resistor R1 and the resistance value of the second resistor R2 are both larger than 100k Ω. It should be noted that, in order to reduce the measurement error of the first voltage and the second voltage, the first resistor R1 and the second resistor R2 should be selected as large as possible, and preferably, the first resistor R1 and the second resistor R2 are resistors of 200k Ω.
Further, referring to fig. 4, the configurations of the positive electrode switching circuit 51 and the negative electrode switching circuit 52 may be set according to actual requirements, for example, the positive electrode switching circuit 51 includes a third switch S3 and a fourth switch S4; the input terminal of the third switch S3 is a first input terminal of the positive pole switch 51, and the input terminal of the fourth switch S4 is a second input terminal of the positive pole switch 51; the output terminal of the third switch S3 is a first output terminal of the positive pole switch 51, and the output terminal of the fourth switch S4 is a second output terminal of the positive pole switch 51;
the negative changeover switch 52 includes a fifth switch S5 and a sixth switch S6; the input terminal of the fifth switch S5 is a first input terminal of the negative switch 52, and the input terminal of the sixth switch S6 is a second input terminal of the negative switch 52; the output terminal of the fifth switch S5 is the first output terminal of the negative switch 52, and the output terminal of the sixth switch S6 is the second output terminal of the negative switch 52;
when the fourth switch S4 and the sixth switch S6 are closed, the voltage detection device 40 is used to detect the total battery voltage between the positive pole and the negative pole of the power battery; the voltage detection device 40 is used to detect the first voltage when the third switch S3 and the fourth switch S4 are closed; when the fifth switch S5 and the sixth switch are closed S6, the voltage detection device 40 is used to detect the second voltage. So that the voltage detection device 40 can detect voltages at different positions by switching different switches.
Further, the first switching device 20 may include a first switch S1 and a second switch S2, and the power supply interface includes a first power supply interface and a second power supply interface;
a first terminal of the first switch S1 is connected to a first terminal of the second switch S2, and a common terminal of the first switch S1 and the first terminal of the second switch S2 is connected to the power interface; a second terminal of the first switch S1 is connected to a first power supply interface, and a second terminal of the second switch S2 is connected to a second power supply interface;
the first power supply interface is used for being connected with a management system interface of the power battery;
and the second power supply interface is used for being connected with a relay interface of the power battery.
The first switch device 20 and the second switch device 50 can also be arranged in the box body, and only corresponding interfaces are required to be arranged on the box body or led out of the box body, so that the first switch device 20 and the second switch device 50 can be more portable when moving, an internal switch circuit is less prone to being damaged, and the stability of the circuit is enhanced.
Further, the fault diagnosis device 30 is connected with a management system interface of the power battery through a detection wire harness; the detection harness includes an OBD (On Board Diagnostics, vehicle mounted automatic diagnostic) terminal and a communication line; the OBD terminal is provided at one end of the communication line, and is used for corresponding connection with the failure diagnosis device 30. The communication line is a CAN (Controller Area Network) communication bus.
The CAN communication bus is provided with two signal wires of CAN2H and CAN2L, and the two signal wires need to be manufactured into a twisted pair; one end of the twisted pair is provided with an OBD terminal for connection with the fault diagnosis device 30, and the other end of the twisted pair is provided with a terminal (not shown) matching the power battery to be detected for establishing connection with the power battery. Therefore, the communication between the fault diagnosis device 30 and the power battery is realized through the twisted pair with the terminals at two ends, and the communication is stable and convenient to carry.
The fault diagnosing device 30 needs to be selected in combination with the actual needs, for example, including a fault diagnosing apparatus 31. The fault diagnosis device 31 may be selected according to the brand and model of the power battery to be detected, and correspondingly, may also need to adapt diagnosis software according to the selected fault diagnosis device, and if the diagnosis software needs to operate by an upper computer, the fault diagnosis device 30 further includes an upper computer terminal 32, and the upper computer terminal 32 may be a notebook computer, a tablet computer, or the like. The OBD terminals facilitate mating and communication with the fault diagnostic 31.
Further, the detection line bundle also comprises a terminal resistor R3; the terminal resistor R3 is arranged between the OBD terminal and the CAN communication bus. Specifically, the termination resistor R3 is connected at a position close to the OBD terminal side of two signal lines, CAN2H and CAN2L, of the CAN communication bus, and the resistance of the termination resistor R3 is 120 Ω, and may be a single resistor or a plurality of resistors connected in series.
Further, the voltage detection device 40 is a multimeter; the red pen-shape metre link of universal meter does the anodal input of voltage detection device, the black pen-shape metre link of universal meter does the negative pole input of voltage detection device. The universal meter is small and exquisite, easily carry and not fragile, greatly increased power battery detection device's portability.
Further, the power supply 10 is a 12V regulated power supply, so that stable direct current can be provided for the power battery.
Based on the above hardware structure, the process of detecting the power battery by using the power battery detection device may be as follows:
detecting the functions of the battery management system: each interface of the first switch device 20 is respectively connected with a 12V stabilized voltage power supply and a power battery, the power battery is connected with a terminal of a twisted pair, and a fault diagnosis instrument 31 is connected with an OBD terminal of the twisted pair and an upper computer 32; the first switch 20 is closed, the other switches are in an off state, and the 12V stabilized voltage power supply supplies power to the ECU and the BMS of the power battery; reading and recording a fault code, a single voltage, a total battery voltage, a factory SOC and a battery temperature of the power battery through a fault diagnosis instrument 31; and comparing the detection result with the standard parameters of the power battery, and judging whether the management system function of the power battery is qualified.
Detection of electrical safety function: the interfaces of the first switch device 20 are respectively connected with a 12V stabilized power supply and a relay of a power battery, and the interfaces of the second switch device 50 are respectively connected with the power battery and a multimeter; the second switch S2, the fourth switch S4 and the sixth switch S6 are closed, the rest switches are in an off state, and the universal meter detects the total voltage between the positive electrode and the negative electrode of the power battery; the second switch S2, the third switch S3 and the fourth switch S4 are closed, the rest switches are disconnected, and the universal meter detects a first voltage at two ends of a first resistor R1; closing the second switch S2, the fifth switch S5 and the sixth switch S6, and opening the other switches to obtain a second voltage at two ends of the second resistor R2; and comparing the three measured voltage values with the detection standard so as to judge whether the electrical safety function of the power battery is qualified.
In summary, based on the above hardware structure, the power battery detection device includes a first switch device, a second switch device, a universal meter, a 12V regulated power supply, a twisted pair with two terminals, a fault diagnosis instrument and an upper computer, which are all connected by a detachable connection line; all equipment is not limited by places when in use, so that the power battery needing to be detected can be detected at any place, and the convenience of power battery detection is greatly improved. The power battery detection device has the characteristics of easiness in operation, low cost, high maneuverability and the like, and application scenes including but not limited to mass production manufacturing poor analysis, experimental battery poor analysis and market poor analysis can be realized, so that the quality control capability and level of a whole vehicle manufacturing enterprise on a power battery system can be improved. And when the user has power battery trouble in the use vehicle process, troubleshooting personnel only need carry the device and arrive the scene and can carry out fault detection and troubleshooting, and no longer need detect to the detection place that large-scale special check out test set belonged to the convenience and the efficiency of maintenance work have been improved.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A power battery detection device, characterized by comprising:
a power source;
a first switching device having a power interface and a power supply interface; the power supply interface is used for being connected with the power supply, and the power supply interface is used for being connected with a power battery;
the fault diagnosis device is connected with the power battery to detect a power supply parameter of the power battery when the first switch device is triggered to be closed;
a voltage detection device having a positive input terminal and a negative input terminal;
a second switching device having a housing interface, a positive input interface, a negative input interface, an insulated output interface, a positive output interface, and a negative output interface;
the positive input interface and the negative input interface are used for connecting the positive electrode and the negative electrode of the power battery in a one-to-one manner; the shell interface is used for connecting a shell of the power battery; the positive output interface, the negative output interface and the insulated output interface are respectively used for connecting a positive input end and a negative input end of the voltage detection device;
the voltage detection device is used for detecting the total battery voltage between the positive electrode and the negative electrode of the power battery, the first voltage between the insulated output interface and the positive electrode input interface and the second voltage between the insulated output interface and the negative electrode input interface through the second switch device when the first switch device is triggered to be closed.
2. The power cell detection device of claim 1, wherein the first switch means comprises a first switch and a second switch, and the power supply interface comprises a first power supply interface and a second power supply interface;
the first end of the first switch is connected with the first end of the second switch, and the common end of the first switch and the first end of the second switch is connected with the power interface; the second end of the first switch is connected with a first power supply interface, and the second end of the second switch is connected with a second power supply interface;
the first power supply interface is used for being connected with a management system interface of the power battery;
and the second power supply interface is used for being connected with a relay interface of the power battery.
3. The power cell detection device of claim 1, wherein the second switching device comprises a first resistor, a positive switch, a second resistor, and a negative switch;
the positive pole change-over switch is provided with a first positive pole input end, a second positive pole input end, a first positive pole output end and a second positive pole output end; the first positive input end is connected with one end of the first resistor, and the second positive input end and the other end of the first resistor are respectively connected with the positive input interface; the first positive output end is respectively connected with the shell interface and the insulated output interface; the second positive electrode output end is connected with the positive electrode output interface;
the negative pole change-over switch is provided with a first negative pole input end, a second negative pole input end, a first negative pole output end and a second negative pole output end; the first negative input end is connected with one end of the second resistor, and the second negative input end and the other end of the second resistor are respectively connected with the negative input interface; the first negative output end is connected with the shell interface, and the second negative output end is connected with the negative output interface.
4. The power battery detection device according to claim 3, wherein the resistance of the first resistor and the resistance of the second resistor are both greater than 100k Ω.
5. The power battery detection device of claim 3, wherein the positive pole change-over switch comprises a third switch and a fourth switch; the input end of the third switch is a first input end of the anode change-over switch, and the input end of the fourth switch is a second input end of the anode change-over switch; the output end of the third switch is a first output end of the positive pole change-over switch, and the output end of the fourth switch is a second output end of the positive pole change-over switch;
the negative electrode change-over switch comprises a fifth switch and a sixth switch; the input end of the fifth switch is a first input end of the negative pole change-over switch, and the input end of the sixth switch is a second input end of the negative pole change-over switch; the output end of the fifth switch is a first output end of the negative pole change-over switch, and the output end of the sixth switch is a second output end of the negative pole change-over switch;
when the fourth switch and the sixth switch are closed, the voltage detection device is used for detecting the total battery voltage between the positive electrode and the negative electrode of the power battery; the voltage detection device is configured to detect the first voltage when the third switch and the fourth switch are closed; the voltage detection device is configured to detect the second voltage when the fifth switch and the sixth switch are closed.
6. The power battery detection apparatus of any one of claims 1-5, wherein the fault diagnosis device interfaces with a management system of the power battery through a detection harness;
the detection harness includes an OBD terminal and a communication line;
the OBD terminal is arranged at one end of the communication line and used for being correspondingly connected with the fault diagnosis device.
7. The power cell detection device of claim 6, wherein the communication line is a CAN communication bus.
8. The power cell detection device of claim 7, wherein the detection harness further comprises a termination resistor; the terminal resistor is arranged between the OBD terminal and the CAN communication bus.
9. The power battery detection device of claim 1, wherein the voltage detection device is a multimeter; the red meter pen connecting end of the universal meter is the positive input end of the voltage detection device, and the black meter pen connecting end of the universal meter is the negative input end of the voltage detection device.
10. The power cell detection device of claim 1, wherein the power source is a 12V regulated power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220305942.0U CN216956293U (en) | 2022-02-15 | 2022-02-15 | Power battery detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220305942.0U CN216956293U (en) | 2022-02-15 | 2022-02-15 | Power battery detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216956293U true CN216956293U (en) | 2022-07-12 |
Family
ID=82290883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220305942.0U Active CN216956293U (en) | 2022-02-15 | 2022-02-15 | Power battery detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216956293U (en) |
-
2022
- 2022-02-15 CN CN202220305942.0U patent/CN216956293U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109884431B (en) | Cordwood system electric automobile direct current facility detection device that charges | |
| CN207263852U (en) | A kind of test system of electric automobile direct-current charging post | |
| CN111812474A (en) | Insulation detection circuit, system and method for DC charging pile | |
| KR20120059943A (en) | Voltage sensing system for detecting disconnection of voltage sensing line of battery | |
| CN103376407B (en) | Method and device, storage battery and the motor vehicle of the Drive Diagnostics of contactor | |
| CN213183232U (en) | Intelligent power battery module training platform for small vehicle | |
| CN216956293U (en) | Power battery detection device | |
| CN112428824A (en) | High-voltage interlocking detection circuit, detection method of disconnection position and control unit | |
| CN210270021U (en) | Direct current fills electric pile testing arrangement and system | |
| CN205353247U (en) | Alternating -current charging interface circuit simulator | |
| CN108819732B (en) | BMS hardware function test system | |
| CN212540657U (en) | Automatic detection charging device and system for battery | |
| CN106093664A (en) | Electric car conduction charging measurement system | |
| CN111929503B (en) | Insulation impedance testing device and method for fuel cell testing | |
| CN112816834B (en) | Pure [ electric ] motor coach insulation fault detecting system | |
| CN111025175B (en) | Automatic joint test method for primary power subsystem of high-orbit communication satellite | |
| CN210534766U (en) | Test equipment of flight control and management computer | |
| CN111883864A (en) | Power battery pack testing assembly and practical training platform | |
| KR20130112496A (en) | Apparatus for measuring isolation resistance having malfunction self-diagnosing and method thereof | |
| CN208589506U (en) | A kind of electric automobile power battery charge and discharge electric detection means | |
| CN107561394B (en) | System for testing low-voltage power supply of vehicle-mounted charger | |
| CN218122053U (en) | Testing device and equipment for EMC testing | |
| CN206431206U (en) | Electric car conduction charging measurement system | |
| CN218383106U (en) | Switch integration device for testing electronic and electrical components, testing system and vehicle | |
| CN110031753A (en) | Quick charging system welding detection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |