CN212514930U - Electric automobile power battery package on-line measuring equipment - Google Patents
Electric automobile power battery package on-line measuring equipment Download PDFInfo
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- CN212514930U CN212514930U CN202021248516.5U CN202021248516U CN212514930U CN 212514930 U CN212514930 U CN 212514930U CN 202021248516 U CN202021248516 U CN 202021248516U CN 212514930 U CN212514930 U CN 212514930U
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Abstract
The application discloses electric automobile power battery package on-line measuring equipment relates to battery package detection technical field, and this on-line measuring equipment includes: the charging device comprises a box body, a charging base and a charging gun, wherein one end of the box body is provided with the charging base, and the other end of the box body is connected with the charging gun which is used for connecting an electric automobile power battery pack; the current transmitter is used for acquiring the charging current of the power battery pack in real time; the controller is used for acquiring the SOC value of the residual electric quantity of the power battery pack in real time and calculating the actual charging capacity and the battery health state value of the power battery pack according to the real-time charging current; and the input end of the switching power supply is connected with the power output end of the charging seat, and the output end of the switching power supply is connected with the current transmitter and the controller and is used for charging the current transmitter and the controller. According to the method and the device, the health state of the power battery pack can be judged according to the battery health state value obtained through calculation, so that the battery pack is prevented from being detached, the detection time is greatly shortened, and the detection efficiency is improved.
Description
Technical Field
The application relates to the technical field of battery pack detection, in particular to online detection equipment for a power battery pack of an electric automobile and the online detection equipment.
Background
At present, for the detection of a new energy automobile and a power battery, only strong detection is performed before the new energy automobile leaves a factory, and tracking, detection and maintenance are rarely performed in the using process of the power battery, so that an owner, a 4S store and an automobile enterprise cannot master the real-time state of the power battery, and passive maintenance can be performed only after the power battery breaks down. The service life of the power battery is greatly shortened, and the frequent occurrence of safety accidents of the new energy automobile is caused. In addition, the health state of the power battery is reduced, so that the actual driving range of the new energy automobile is often lower than the displayed mileage, and the half-way breakdown sometimes occurs. The main reason for the above problems is that the current collecting system and the voltage collecting system inside the power battery pack change with the change of time/temperature during the use process, which leads to the reduction of collecting precision and even failure. The use and maintenance personnel of the power battery pack can hardly judge whether the capacity of the power battery pack reaches the standard or not according to the existing conditions, or the manufacturer has the condition of virtual marks.
In the related art, the power battery pack is generally sent to a third-party laboratory for integral charging and discharging tests, so that whether the capacity of the battery pack and the acquisition of a BMS system reach the standard or not is judged.
However, the charging and discharging test not only takes a long time, but also has high requirements on the quality of experimental equipment and testing personnel and high cost. In addition, the power battery pack is quite complex to disassemble and assemble, needs professional engineering personnel to spend a large amount of time to carry out, and wastes time and labor.
SUMMERY OF THE UTILITY MODEL
One of the defect to existence among the prior art, the aim at of this application provides an electric automobile power battery package on-line measuring equipment in order to solve current charge-discharge test and waste time and energy's problem.
The application provides an electric automobile power battery package on-line measuring equipment, it includes:
the charging device comprises a box body, a charging base and a charging gun, wherein one side of the box body is provided with the charging base for connecting a charging pile, and the other side of the box body is connected with the charging gun which is used for connecting an electric automobile power battery pack;
the current transmitter is arranged in the box body, is electrically connected with the charging seat and the charging gun, and is used for acquiring the charging current of the power battery pack in real time;
the controller is arranged in the box body, is electrically connected with the charging seat and the charging gun, is used for acquiring the SOC value of the residual electric quantity of the power battery pack in real time, and is also used for calculating the actual charging capacity and the battery health state value of the power battery pack according to the real-time charging current;
and the input end of the switching power supply is connected with the power output end of the charging seat, and the output end of the switching power supply is connected with the current transmitter and the controller and is used for supplying power to the current transmitter and the controller.
In some embodiments, further comprising: and the voltage transmitter is electrically connected with the charging seat and the charging gun, is used for acquiring the charging voltage of the power battery pack in real time and sending the charging voltage to the controller.
In some embodiments, the controller is further configured to stop the calculation when the charging voltage exceeds a preset voltage range.
In some embodiments, the switching power supply includes a power supply change module and a power supply switch, which are connected to each other, the power supply switch is connected to the power output terminal of the charging dock, and the power supply change module is configured to convert an input ac power into a dc power.
In some embodiments, the power supply variation module is disposed in the box, the power switch is disposed on a sidewall of the box, and the power switch and the charging base are disposed on a same sidewall of the box.
In some embodiments, the charging base includes a first connection terminal set, the charging gun includes a second connection terminal set, and the first connection terminal set is electrically connected to the second connection terminal set.
In some embodiments, the first connection terminal set includes a first direct current power supply DC +, a first DC-, a first auxiliary power supply a +, a first a-, a first CAN communication pin S +, a first S-, a first connection confirmation detection point CC1, a first CC2, and a first ground pin 0;
the second connection end group comprises a second DC +, a second DC-, a second A +, a second A-, a second S +, a second S-, a second CC1, a second CC2 and a second ground pin 0 which are connected with the first connection end group in a one-to-one correspondence mode.
In some embodiments, a touch screen is disposed on a surface of the box, and an output end of the controller is connected to the touch screen.
In some embodiments, the switching power supply is a 220V to 24V, 12V, or 5V power supply.
In some embodiments, the power battery pack is a lithium battery pack.
The beneficial effect that technical scheme that this application provided brought includes:
the utility model provides an electric automobile power battery wraps on-line measuring equipment, because one side of box is equipped with the charging seat that is used for connecting the electric pile that fills, the opposite side is connected with the rifle that charges that links to each other with electric automobile power battery package, in-process charging power battery package, the SOC value of power battery package can be acquireed in real time to the controller, and according to real-time charging current calculation power battery package's actual charge capacity and battery health status value, therefore, can be according to the battery health status value that obtains of calculation, judge the health status of power battery package, the dismantlement of battery package has not only been avoided, detection time has greatly been shortened simultaneously, and the detection efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of an online detection device for a power battery pack of an electric vehicle according to an embodiment of the present application;
fig. 2 is a flowchart of an online detection method for a power battery pack of an electric vehicle according to an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1, an embodiment of the present application provides an online detection device for a power battery pack of an electric vehicle, which includes a box, a switching power supply, a current transformer, and a controller.
One side of box is equipped with the charging seat that is used for connecting the electric pile that fills, and the opposite side of box is connected with the rifle that charges, and the above-mentioned rifle that charges is used for connecting electric automobile's the mouth that charges, charges for power battery package.
Current transmitter sets up in above-mentioned box, and current transmitter is connected with above-mentioned charging seat and rifle electricity that charges, and current transmitter is used for gathering the charging current of above-mentioned power battery package in real time to send to the controller.
The controller is arranged in the box body, is electrically connected with the charging seat and the charging gun, is used for acquiring the SOC (State of Charge) value of the power battery pack in real time, is also electrically connected with the current transducer, and calculates the actual charging capacity and the battery health State value of the power battery pack according to the real-time charging current electrically transmitted by the current transducer. And determining the health state of the power battery pack according to the calculated battery health state value.
The input end of the switch power supply is connected with the power output end of the charging seat, the output end of the switch power supply is connected with the current transmitter and the controller, and the switch power supply can convert the input 220V commercial power into direct current to supply power for the current transmitter and the controller.
The online detection equipment of the embodiment of the application has small volume and is convenient to move. Because one side of box is equipped with the charging seat that is used for connecting the electric pile of filling, the opposite side is connected with the rifle that charges that links to each other with electric automobile power battery package, in the in-process of charging power battery package, the controller can acquire the SOC value of power battery package in real time, and calculate the actual charge capacity and the battery health status value of power battery package according to real-time charging current, consequently, can be according to the battery health status value that the calculation obtained, judge the health status of power battery package, the dismantlement of battery package has not only been avoided, greatly shortened check-out time simultaneously, improve detection efficiency
The on-line measuring equipment of this embodiment still includes voltage transmitter, and above-mentioned voltage transmitter is connected with above-mentioned charging seat and rifle electricity that charges for gather the charging voltage of above-mentioned power battery package in real time, and send to above-mentioned controller. And when the charging voltage exceeds a preset voltage range, the controller is also used for stopping calculation so as to finish the detection process.
The switch power supply comprises a power supply change module and a power supply switch which are connected with each other, the power supply switch is connected with the power supply output end of the charging seat, and the power supply change module is used for converting input alternating current into direct current.
In this embodiment, the power supply change module is disposed in the box, the power switch is disposed on a side wall of the box, the power switch and the charging base are disposed on a same side wall of the box, and the charging gun is disposed on another side wall of the box opposite to the charging base.
Further, the charging seat comprises a first connecting end group, the charging gun comprises a second connecting end group, and the first connecting end group is electrically connected with the second connecting end group. The charging seat is connected with the charging gun head of the charging pile, then the charging gun is inserted into the electric vehicle to be tested, after the power switch is turned on, the charging pile can be started, and the charging pile and the tested electric vehicle can be waited to shake hands successfully.
Specifically, the first connection terminal group includes 9 connection terminals, i.e., a first direct current power supply DC +, a first DC-, a first auxiliary power supply a +, a first a-, a first CAN communication pin S +, a first S-, a first connection confirmation detection point CC1, a first CC2, and a first ground pin 0.
The second connection end group comprises 9 connection terminals which are connected with the first connection end group in a one-to-one correspondence mode, namely a second DC +, a second DC-, a second A +, a second A-, a second S +, a second S-, a second CC1, a second CC2 and a second grounding pin 0.
The first grounding pin 0 and the second grounding pin 0 are protection grounding; first and second DC + connections, and first and second DC-connections, representing a DC power supply for the charging gun; the first A + and second A + connections, and the first A-and second A-connections, represent a low voltage auxiliary power supply for the charging gun; the first S + to second S + connection and the first S-to second S-connection indicate CAN communication interface connection, the first CC1 to second CC1 connection and the first CC2 to second CC2 connection, indicating charging connection confirmation.
In this embodiment, the surface of the box body is further provided with a touch screen, and the output end of the controller is connected with the touch screen. Optionally, a printer is further arranged on the box body, and the output end of the controller is further connected with the printer.
In this embodiment, the switching power supply is a 220V to 24V, 12V, or 5V power supply. The charging seat connects the 220V AC to the power switch interface, and then can output +24V DC, +12V DC and +5V DC after passing through the power change module, wherein the +12V DC supplies power to the voltage transmitter and the current transmitter, the +5V DC supplies power to the controller, and the +24V DC supplies power to the touch screen 8 and the printer 9.
Specifically, after the detection is controlled and started through a start button on the touch screen, the voltage transducer collects online charging voltage and converts the online charging voltage into a 0-5V DC voltage signal to be output to the controller, the current transducer collects charging current and converts the charging current into a 0-5V DC voltage signal to be output to the controller, and the SOC information of the electric vehicle is connected to the controller through the CAN communication bus. After calculation processing, the controller can upload the calculation result to the touch screen 8 through RS485 communication, generate a detection report according to the calculation result, transmit the detection report to the printer 9 through RS485, and print the required report. Alternatively, the controller is a DSP (Digital Signal Processing) controller.
In this embodiment, the charging seat is direct to be connected with charging pile, and the rifle that charges of box one side can be direct seamless butt joint electric motor car mouth that charges, has avoided the dismantlement of battery package, plug-and-play. And all interfaces are in hard connection, and additional cables are not required. Optionally, the power battery pack is a lithium battery pack.
Referring to fig. 2, an embodiment of the present application further provides an online detection method based on the above online detection device for a power battery pack of an electric vehicle, which includes the steps of:
s1, acquiring an SOC value of a power battery pack during initial charging as a first SOC, and setting an SOC difference value.
And S2, when the first SOC is in a preset range, charging the power battery pack through a charging gun, when the first SOC is added with 1, starting to accumulate the charging ampere-hour, taking the SOC value after the 1 addition as an initial SOC, and taking the sum of the initial SOC and the SOC difference value as a termination SOC, namely determining a termination condition.
And S3, when the SOC value of the power battery pack reaches the termination SOC, acquiring the charging ampere-hour from the initial SOC to the termination SOC of the power battery pack, and calculating a first actual charging capacity and a battery health state value of the power battery pack so as to judge the health state of the power battery pack.
Preferably, when the first SOC is less than or equal to the minimum value of the preset range, the power battery pack is charged by the charging gun until the first SOC is greater than the minimum value, and then the power battery pack is charged until the first SOC is increased by 1 to perform detection.
In other embodiments, when the first SOC is greater than or equal to the maximum value of the preset range, the power battery pack may be discharged by a discharging device until the first SOC is less than the maximum value, and then the detection is performed.
In this embodiment, the minimum value of the preset range is 24%, and the maximum value of the preset range is a difference between 74% and the SOC difference, that is, the initial SOC needs to be greater than 25%, and the ending SOC needs to be less than 75%. To prevent possible metering deviations of the battery pack during the initial and cut-off phases of charging.
Further, in step S3, the obtaining a charging ampere-hour from an initial SOC to a final SOC of the power battery pack, and calculating a first actual charging capacity and a battery state of health value of the power battery pack specifically includes:
firstly, the charging current and the charging time of the power battery pack from the initial SOC to the ending SOC are obtained, and the charging current is integrated to obtain the charging ampere-hour from the initial SOC to the ending SOC.
Then, the ratio of the charging ampere-hour amount to the set SOC difference value is used as the first actual charging capacity. I.e. the first actual charging capacity Q1Comprises the following steps:
wherein I is the charging current, t is the charging time, SOC0Is an initial SOC, SOCtTo terminate the SOC.
Finally, the first actual charging capacity Q is used1To rated capacity Q0As the battery state of health value η1：
Preferably, when the power battery pack is charged by the charging gun, the charging gun further includes:
and collecting the charging voltage output by the switching power supply in real time through a voltage transducer. And when the charging voltage exceeds a preset voltage range, indicating that the charging detection process is abnormal, and stopping detection.
Further, before the SOC value of the power battery pack reaches the termination SOC in step S3, the method further includes:
first, a plurality of SOC values between the initial SOC and the final SOC are selected.
Then, the charging ampere-hour from the initial SOC to each SOC value is obtained, and a plurality of actual charging capacities are obtained.
After the first actual charging capacity is obtained through calculation, weighted summation is carried out according to the weight values corresponding to the actual charging capacities including the first actual charging capacity, and the battery health state value is calculated according to the actual charging capacity after weighted summation and the rated capacity of the battery pack. Each weight value of the embodiment can be calibrated through a real vehicle test using the same type of power battery pack.
In this embodiment, before the SOC value of the power battery pack reaches the termination SOC, the method further includes:
first, a second SOC value and a third SOC value between an initial SOC and a termination SOC are selected. And subtracting 2 from the termination SOC to obtain a second SOC value, and subtracting 1 from the termination SOC to obtain a third SOC value.
Secondly, when the SOC value of the power battery pack reaches a second SOC value, a second actual charging capacity Q of the power battery pack from the initial SOC value to the second SOC value is obtained2。
Then, when the SOC value of the power battery pack reaches a third SOC value, a third actual charging capacity Q of the power battery pack from the initial SOC value to the third SOC value is obtained3。
Finally, according to the first actual charging capacity Q1Second actual charge capacity Q2And a third actual charging capacity Q3Carrying out weighted summation according to the corresponding weight values, and carrying out weighted summation according to the actual charging capacity Q after weighted summation and the rated capacity Q of the battery pack0And calculating the battery health state value of the power battery pack, namely taking the ratio of the actual charging capacity to the rated capacity as the battery health state value.
In the present embodiment, the first actual charging capacity Q1Has a weight of 1-x-y, and a second actual charge capacity Q2Corresponding weight is x, third actual charge capacity Q3The corresponding weight is y. The weighted sum of the actual charge capacity Q is:
Q＝(1-x-y)Q1+x Q2+y Q3
preferably, x is 0.1-0.4 and y is 0.1-0.3.
The online detection method is suitable for the online detection devices, is simple in detection process, avoids errors in single value taking caused by factors such as battery impedance and the like, and improves accuracy of test results.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present application, but any changes in the shape or structure thereof, which are similar or identical to the technical solution of the present invention, are within the scope of protection.
Claims (10)
1. The utility model provides an electric automobile power battery wraps on-line measuring equipment which characterized in that, it includes:
the charging device comprises a box body, a charging base and a charging gun, wherein one side of the box body is provided with the charging base for connecting a charging pile, and the other side of the box body is connected with the charging gun which is used for connecting an electric automobile power battery pack;
the current transmitter is arranged in the box body, is electrically connected with the charging seat and the charging gun, and is used for acquiring the charging current of the power battery pack in real time;
the controller is arranged in the box body, is electrically connected with the charging seat and the charging gun, is used for acquiring the SOC value of the residual electric quantity of the power battery pack in real time, and is also used for calculating the actual charging capacity and the battery health state value of the power battery pack according to the real-time charging current;
and the input end of the switch power supply is connected with the power output end of the charging seat, and the output end of the switch power supply is connected with the current transmitter and the controller and is used for supplying power to the current transmitter and the controller.
2. The electric vehicle power battery pack online detection device of claim 1, further comprising: and the voltage transmitter is electrically connected with the charging seat and the charging gun, is used for acquiring the charging voltage of the power battery pack in real time and sending the charging voltage to the controller.
3. The electric vehicle power battery pack online detection device of claim 2, characterized in that: the controller is further configured to stop the calculation when the charging voltage exceeds a preset voltage range.
4. The electric vehicle power battery pack online detection device of claim 1, characterized in that: the switch power supply comprises a power supply change module and a power supply switch which are connected with each other, the power supply switch is connected with the power supply output end of the charging seat, and the power supply change module is used for converting input alternating current into direct current.
5. The electric vehicle power battery pack online detection device of claim 4, characterized in that: the power supply change module is arranged in the box body, the power supply switch is arranged on the side wall of the box body, and the power supply switch and the charging seat are arranged on the same side wall of the box body.
6. The electric vehicle power battery pack online detection device of claim 1, characterized in that: the charging seat comprises a first connecting end group, the charging gun comprises a second connecting end group, and the first connecting end group is electrically connected with the second connecting end group.
7. The electric vehicle power battery pack online detection device of claim 6, characterized in that:
the first connection terminal group comprises a first direct current power supply DC +, a first DC-, a first auxiliary power supply A +, a first A-, a first CAN communication pin S +, a first S-, a first connection confirmation detection point CC1, a first CC2 and a first grounding pin 0;
the second connection end group comprises a second DC +, a second DC-, a second A +, a second A-, a second S +, a second S-, a second CC1, a second CC2 and a second grounding pin 0 which are connected with the first connection end group in a one-to-one correspondence mode.
8. The electric vehicle power battery pack online detection device of claim 1, characterized in that: the surface of the box body is provided with a touch screen, and the output end of the controller is connected with the touch screen.
9. The electric vehicle power battery pack online detection device of claim 1, characterized in that: the switching power supply is a power supply converting 220V to 24V, 12V and 5V.
10. The electric vehicle power battery pack online detection device of claim 1, characterized in that: the power battery pack is a lithium battery pack.
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| CN202021248516.5U CN212514930U (en) | 2020-06-29 | 2020-06-29 | Electric automobile power battery package on-line measuring equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693875A (en) * | 2020-06-29 | 2020-09-22 | 武汉新能源研究院有限公司 | Online detection device and online detection method for power battery pack of electric vehicle |
| CN113176505A (en) * | 2021-04-30 | 2021-07-27 | 重庆长安新能源汽车科技有限公司 | On-line estimation method and device for state of charge and state of health of vehicle-mounted power battery and storage medium |
-
2020
- 2020-06-29 CN CN202021248516.5U patent/CN212514930U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693875A (en) * | 2020-06-29 | 2020-09-22 | 武汉新能源研究院有限公司 | Online detection device and online detection method for power battery pack of electric vehicle |
| CN113176505A (en) * | 2021-04-30 | 2021-07-27 | 重庆长安新能源汽车科技有限公司 | On-line estimation method and device for state of charge and state of health of vehicle-mounted power battery and storage medium |
| CN113176505B (en) * | 2021-04-30 | 2022-10-04 | 重庆长安新能源汽车科技有限公司 | On-line estimation method and device for state of charge and state of health of vehicle-mounted power battery and storage medium |
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