CN213581278U - Detection equipment for available capacity of power battery of electric automobile - Google Patents
Detection equipment for available capacity of power battery of electric automobile Download PDFInfo
- Publication number
- CN213581278U CN213581278U CN202022636196.7U CN202022636196U CN213581278U CN 213581278 U CN213581278 U CN 213581278U CN 202022636196 U CN202022636196 U CN 202022636196U CN 213581278 U CN213581278 U CN 213581278U
- Authority
- CN
- China
- Prior art keywords
- power battery
- available capacity
- charging
- capacity
- unit
- 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
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
The utility model relates to a check out test set of electric automobile power battery available capacity, it includes: the power supply is used for charging the power battery; the detection device comprises a timing unit, a voltage detection unit and a current detection unit, wherein the timing unit is used for detecting charging time, the voltage detection unit is used for detecting the voltage of the power battery in the charging process in real time, and the current detection unit is used for detecting the current of the power battery in the charging process in real time; and the calculating device comprises a first calculating unit and a second calculating unit, wherein the first calculating unit is used for calculating the charging capacity of the power battery according to the charging time, the voltage and the current, and the second calculating unit is used for calculating the available capacity of the power battery according to the charging capacity of the power battery and the nominal capacity of the power battery. The accuracy of the available capacity of the power battery can be improved, and the error between the available capacity of the power battery and the actual available capacity of the power battery is reduced.
Description
Technical Field
The utility model relates to a power battery's detection technology field, concretely relates to check out test set of electric automobile power battery available capacity.
Background
With the increase of the service life of the pure electric vehicle, the power battery inevitably faces the problem of decline. Generally, related researches in the aspect of power battery degradation at home and abroad mainly focus on the basic chemical principle of power battery degradation, and a scientific and reasonable method and equipment for detecting the available capacity of the power battery are formed without combining the running condition and the use characteristics of a vehicle.
At present, most methods for judging the available capacity of the power battery of the pure electric vehicle are mostly based on parameters of the service performance of the power battery, the available capacity of the power battery is predicted through model fitting, and certain errors exist between the predicted available capacity and the actual available capacity of the power battery.
How to detect the available capacity of the power battery and reduce the error between the available capacity and the actual available capacity is a technical problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an electric automobile power battery available capacity's check out test set can improve power battery's available capacity's detection accuracy, reduces the error between its and the power battery actual available capacity.
In order to solve the technical problem, the utility model provides a check out test set of electric automobile power battery available capacity, it includes:
the power supply is used for charging the power battery;
the detection device comprises a timing unit, a voltage detection unit and a current detection unit, wherein the timing unit is used for detecting charging time, the voltage detection unit is used for detecting the voltage of the power battery in the charging process in real time, and the current detection unit is used for detecting the current of the power battery in the charging process in real time;
and the calculating device comprises a first calculating unit and a second calculating unit, wherein the first calculating unit is used for calculating the charging capacity of the power battery according to the charging time, the voltage and the current, and the second calculating unit is used for calculating the available capacity of the power battery according to the charging capacity of the power battery and the nominal capacity of the power battery.
When the available capacity of the power battery is detected, the power battery to be detected needs to be discharged to the state of charge of 0, namely the power battery is initialized before charge detection is carried out, so that the electric quantity of the power battery reaches the state of charge of 0, then the power battery is charged and detected, specifically, the power supply charges the power battery until the state of charge of 100% is reached, the timing unit records the charging time of the process that the power battery is charged from the state of charge of 0 to the state of charge of 100%, the voltage detection unit detects the voltage value in the charging time, the current detection unit detects the current value I in the charging time, and then the first calculation unit calculates the charging capacity C of the power battery according to a formulatFinally, the nominal capacity C of the power battery is combined through a second calculation unit0And the charging capacity CtAnd calculating the available capacity eta of the power battery according to a formula, wherein the available capacity eta refers to the percentage of the electric quantity which can be charged or discharged by the power battery to the nominal capacity of the power battery under a certain condition.
By the detection equipment for the available capacity of the power battery of the electric automobile, the charging capacity C of the power battery can be detectedtIn combination with a nominal capacity C0And calculating the available capacity eta of the power battery so as to obtain the current health state of the power battery and judge whether the current health state meets a preset threshold value or the condition that the equipment continues to work.
Optionally, the detection device further includes an environmental condition detection unit, configured to detect an environmental condition parameter of the power battery during the charging process.
Optionally, the environmental condition detection unit comprises a temperature detection unit and/or a humidity detection unit.
Optionally, the system further comprises an alarm device, wherein the alarm device is connected with the computing device and used for sending an alarm signal when the available capacity is smaller than the preset capacity.
Optionally, the portable electronic device further comprises a casing, the detection device and the computing device are both arranged on the casing, the casing is provided with a charging socket and a discharging socket which are electrically connected, the power supply can be connected with the charging socket, and the power battery can be connected with the discharging socket.
Optionally, the portable electronic device further comprises a display device disposed on an outer wall of the housing, and the display device is connected to the detection device and the calculation device and is configured to display a detection result of the detection device and a calculation result of the calculation device.
Optionally, a heat dissipation device is further disposed in the housing, and heat dissipation holes are further disposed on the side wall of the housing.
Drawings
FIG. 1 is a schematic diagram of a device for detecting the available capacity of a power battery of an electric vehicle;
fig. 2 is a schematic structural diagram of a device for detecting the available capacity of a power battery of an electric vehicle.
In FIGS. 1-2, the reference numbers are illustrated as follows:
1-a power supply;
2-detection device, 21-voltage detection unit, 22-current detection unit, 23-temperature detection unit, 24-humidity detection unit;
3-calculation means, 31-first calculation unit, 32-second calculation unit;
4-an alarm device;
5-shell, 51-charging socket, 52-discharging socket, 53-heat dissipation hole, 54-detection socket, 55-observation window, 56-data interface;
6-a display device;
7-a circuit board;
8-an electrical connector;
9-controlling the protection device;
10-electric automobile.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
The embodiment of the utility model provides a detection device for the available capacity of an electric automobile power battery, as shown in figure 1 and figure 2, the device for detecting the available capacity of the power battery of the electric automobile comprises a power supply 1, a detection device 2 and a calculation device 3, wherein the power supply 1 is used for charging the power battery, the detection device 2 comprises a timing unit, a voltage detection unit 21 and a current detection unit 22, the detecting device 2 is used for detecting parameters in the process of charging the power battery to the state of charge of 100%, the timing unit is used for detecting charging time, the voltage detecting unit 21 is used for detecting voltage values, the current detecting unit 22 is used for detecting current values, the calculating device 3 comprises a first calculating unit 31 and a second calculating unit 32, wherein the first calculation unit 31 is capable of calculating the charging capacity C of the power battery according to equation (1) from the charging time, the voltage value and the current value.t：
The second calculation unit 32 is able to calculate the charge capacity C of the power batterytAnd said nominal capacity C0Calculating the available capacity eta of the power battery according to the formula (2):
specifically, when the available capacity of the power battery is detected, the power battery to be detected needs to be discharged to the state of charge of 0, which is equivalent to initializing the power battery before charge detection so that the electric quantity of the power battery reaches the state of charge of 0, then charge detection is performed on the power battery, specifically, the power supply 1 charges the power battery until the state of charge of 100 is reached, the timing unit records the charging time of the process that the power battery is charged from the state of charge of 0 to the state of charge of 100%, and the voltage detection unit records the charging time of the power battery from the state of charge of 0 to the state of charge of 100%, so that the voltage detectionThe measuring unit 21 detects the voltage value during the charging period, the current detecting unit 22 detects the current value I during the charging period, and then the first calculating unit 31 calculates the charging capacity C of the power battery according to the above formula (1)tFinally, the nominal capacity C of the power battery is combined by the second calculation unit 320And the charging capacity CtAnd calculating the available capacity eta of the power battery according to the formula (2), wherein the available capacity is the percentage of the electric quantity which can be charged or discharged by the power battery to the nominal capacity of the power battery under a certain condition.
By the detection equipment for the available capacity of the power battery of the electric automobile provided by the embodiment, the charging capacity C of the power battery can be detectedtIn combination with a nominal capacity C0And calculating the available capacity eta of the power battery so as to obtain the current health state of the power battery and judge whether the current health state meets a preset threshold value or the condition that the equipment continues to work.
Where from 0 to 100% state of charge is a charge-only process where there is no simultaneous discharge, and for the nominal capacity of the battery, reference may be made to the power battery reserve indicated on the power battery product by the battery manufacturer.
In the above embodiment, the detection device 2 further includes an environmental condition detection unit for detecting an environmental condition parameter of the power battery during charging, and referring to the influence of the environmental condition when calculating the available capacity η of the battery, specifically, the influence (correction coefficient σ) of the environmental condition difference parameter is added to the above formula (2) and formula (3) is obtained:
the available capacity eta of the power battery obtained by calculation according to the formula (3) is closer to the available capacity of the actual battery, and the judgment is more accurate.
Further, in this embodiment, the environmental condition detecting unit includes a temperature detecting unit 23 and/or a humidity detecting unit 24, that is, the environmental condition parameter packageIncluding at least one of a temperature parameter and a humidity parameter, the correction coefficient sigma is sigma when the environmental condition parameter includes the temperature parameter1In this case, the above formula (3) is
When the environmental condition parameter includes a humidity parameter, the correction coefficient σ takes σ2In this case, the above formula (3) is
When the environmental condition parameter includes a temperature parameter and a humidity parameter, the correction coefficient σ is σ1·σ2In this case, the above formula (3) is
Specifically, the correction coefficient (σ) is more corresponding to different temperature parameters or humidity parameters1Or σ2) Can be obtained according to a plurality of experimental summaries or can be obtained according to calculation, and is not particularly limited.
In the above embodiment, the detection device further comprises an alarm device 4, and the alarm device 4 is connected to the computing device 3 and is used for sending an alarm signal when the available capacity of the power battery is smaller than the preset capacity. Specifically, when the calculating device 3 calculates that the available capacity of the power battery is smaller than a preset capacity, the alarm device 4 can send an alarm signal, where the preset capacity refers to the preset threshold or a condition that the equipment continues to work, and if the detected available capacity of the power battery is smaller than the preset capacity, an alarm is sent to prompt replacement or maintenance. The alarm device 4 may specifically alarm through sound, light signal, or send an alarm signal to a remote location, which is not limited herein. In addition, as shown in fig. 2, the alarm device 4 includes a plurality of alarm units, wherein one alarm unit is used for alarming when the available capacity of the power battery is smaller than the preset capacity, and the other alarm units can alarm when the parameters such as current, voltage, temperature, humidity and the like exceed the preset range, so as to avoid the situations such as faults and the like.
In the above embodiment, the detection device further comprises a housing 5, the detection device 2 and the computing device 3 are both arranged on the housing 5, and the housing 5 is provided with a charging socket 51 and a discharging socket 52 which are electrically connected, specifically, the power supply 1 can be connected with the charging socket 51, and the power battery can be connected with the discharging socket 52, that is, the detection device 2 in the housing 5 is connected in series between the power supply 1 and the power battery. In addition, the alarm device 4 is also integrated in the outer wall of the housing 5.
In the above embodiment, the outer wall of the housing 5 is further provided with a display device 6, the display device 6 is connected with the detection device 2 and the calculation device 3, and is used for displaying the detection result of the detection device 2 and monitoring various parameters in the charging detection process, including specifically current, voltage, temperature, humidity, and the like, and meanwhile, the display device 6 can also display the calculation result of the calculation device 3 so as to visually display the available capacity of the power battery.
In addition, still be equipped with heat abstractor in the casing 5 to the lateral wall of casing 5 still corresponds and is equipped with louvre 53, and is specific, heat abstractor can be fan etc. to discharge the hot-air in casing 5 by louvre 53, guarantee that the higher operational environment who influences parts such as detection device 2 and computing device 3 of casing 5 internal temperature.
Fig. 1 is a schematic diagram of the detection device provided by this embodiment for detecting the available capacity of a power battery, wherein the power battery is mounted on an electric vehicle 10 during the detection process, the components are connected through electrical connectors 8, and a control protection device 9 is further provided in the line connection. The detection device 2 is connected in series between the power supply 1 (charging pile) and the power battery (electric vehicle 10) and used for detecting current value, voltage value, temperature and humidity, the calculation device 3 can calculate and obtain the available capacity of the power battery according to the collected signals and the formulas (1) - (3), and then the collected result and the calculation result are displayed in the display device 6.
In detail, the detection device 2 comprises a high voltage part and a low voltage part, wherein the high voltage part is capable of supplying power to the low voltage part. Specifically, the high-voltage part comprises a micro control unit, an AD conversion, an alarm device 4, a radiator, an RS485 (reserved) and the like, wherein the micro control unit adopts stm32F series 32-bit ARM microcontroller, the core of the micro control unit is Cortex-M3, and the micro control unit comprises a timer (a timing unit), an Analog-to-digital converter (ADC), a Serial Peripheral Interface (SPI), a Universal Asynchronous Receiver/Transmitter (USB), an Inter Integrated Circuit (IIC) and Universal Asynchronous Receiver/Transmitter (UART), and other peripherals, a Direct Memory Access (DMA) controller, a GPIO, a PWM and other resources. The voltage detection unit 21 and the current detection unit 22 are both AD7606 chips, and the AD7606 chip is a 16-bit and 8-channel synchronous sampling analog-digital Data Acquisition System (DAS).
The electric appliance elements are internally provided with an analog input clamping protection, a second-order anti-aliasing filter, a tracking and holding amplifier, a 16-bit charge redistribution successive approximation ADC, a digital filter, a 2.5V reference voltage source, a reference voltage buffer and high-speed serial and parallel interfaces. The temperature detection unit 23 and the humidity detection unit 24 adopt a ZS05 temperature and humidity module, the ZS05 is a temperature and humidity module for outputting digital signals, and a special digital module acquisition technology is adopted to ensure that the product has higher reliability and stability. ZS05 adopts standard IIC communication mode and can be directly connected to IIC communication bus.
The low pressure part is including nuclear core plate and respectively with 1 management of power, UART communication, CAN communication, display screen, USB interface, net gape and SD cassette etc. that nuclear core plate is connected, conveniently is connected with external equipment, and wherein, nuclear core plate is connected with display device 6 for control display device 6's the demonstration condition. The low voltage part can display and store signals of voltage value, current value, temperature, humidity and the like through the display device 6, and has the functions of historical data query, deletion, time calibration, backlight adjustment of the display device 6 and the like.
In addition, the casing 5 is further provided with a detection jack 54 for installing an environmental condition detection unit, and in order to facilitate observing conditions such as installation of the circuit board 7 (including the micro control unit of the high-voltage part and the core board of the low-voltage part) in the casing 5, an observation window 55 is further opened on the side wall of the casing 5, so as to facilitate observing conditions inside from the outside, specifically, the observation window 55 may be provided with a transparent protective layer such as glass, plastic, and the like.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The utility model provides a detection equipment of electric automobile power battery available capacity which characterized in that includes:
a power supply (1) for charging a power battery;
the detection device (2) comprises a timing unit, a voltage detection unit (21) and a current detection unit (22), wherein the timing unit is used for detecting charging time, the voltage detection unit (21) is used for detecting the voltage of the power battery in the charging process in real time, and the current detection unit (22) is used for detecting the current of the power battery in the charging process in real time;
the calculating device (3) comprises a first calculating unit (31) and a second calculating unit (32), wherein the first calculating unit (31) is used for calculating the charging capacity of the power battery according to the charging time, the voltage and the current, and the second calculating unit (32) is used for calculating the available capacity of the power battery according to the charging capacity of the power battery and the nominal capacity of the power battery.
2. The detection device of the available capacity of the power battery of the electric automobile according to claim 1, characterized in that the detection device (2) further comprises an environmental condition detection unit for detecting an environmental condition parameter of the power battery during the charging process.
3. The detection device of the available capacity of the power battery of the electric vehicle according to claim 2, characterized in that the environmental condition detection unit comprises a temperature detection unit (23) and/or a humidity detection unit (24).
4. The detection device of the available capacity of the power battery of the electric automobile according to any one of claims 1 to 3, characterized by further comprising an alarm device (4), wherein the alarm device (4) is connected with the computing device (3) and is used for sending an alarm signal when the available capacity is smaller than a preset capacity.
5. The device for detecting the available capacity of the power battery of the electric automobile according to any one of claims 1-3, characterized by further comprising a housing (5), wherein the detection device (2) and the computing device (3) are both arranged on the housing (5), the housing (5) is provided with a charging socket (51) and a discharging socket (52) which are electrically connected, the power supply (1) can be connected with the charging socket (51), and the power battery can be connected with the discharging socket (52).
6. The device for detecting the available capacity of the power battery of the electric automobile according to claim 5, further comprising a display device (6) disposed on an outer wall of the housing (5), wherein the display device (6) is connected with the detection device (2) and the calculation device (3) and is used for displaying a detection result of the detection device (2) and a calculation result of the calculation device (3).
7. The apparatus for detecting the available capacity of the power battery of the electric vehicle according to claim 5, wherein a heat dissipation device is further disposed in the housing (5), and a heat dissipation hole (53) is further disposed on a side wall of the housing (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022636196.7U CN213581278U (en) | 2020-11-13 | 2020-11-13 | Detection equipment for available capacity of power battery of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022636196.7U CN213581278U (en) | 2020-11-13 | 2020-11-13 | Detection equipment for available capacity of power battery of electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213581278U true CN213581278U (en) | 2021-06-29 |
Family
ID=76538010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022636196.7U Active CN213581278U (en) | 2020-11-13 | 2020-11-13 | Detection equipment for available capacity of power battery of electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213581278U (en) |
-
2020
- 2020-11-13 CN CN202022636196.7U patent/CN213581278U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103616648B (en) | Multi-cascade high pressure, high power battery group monitoring management device | |
| CN102025170A (en) | Display calculation type storage battery instant electric quantity charge-discharge protection management system | |
| CN112345946A (en) | Detection method and detection equipment for available capacity of power battery | |
| EP4123867B1 (en) | Smart battery device, and electronic device thereof | |
| CN213581278U (en) | Detection equipment for available capacity of power battery of electric automobile | |
| CN203502565U (en) | Storage battery detector | |
| CN207995637U (en) | A kind of data acquisition device | |
| CN207868329U (en) | From control module and battery management system | |
| CN110780260A (en) | System and method for checking electric energy error of direct current charger | |
| CN116027207A (en) | Battery electric quantity detection circuit, electronic equipment and electric quantity metering method | |
| CN203536994U (en) | Vehicle-mounted uninterruptible power supply storage battery control and management device | |
| CN213213125U (en) | Intelligent charging stake towards auxiliary assembly of transformer substation | |
| CN110161415A (en) | A kind of battery current acquisition system and diagnostic method | |
| US20090208818A1 (en) | Battery cell fuel gauge for packaged batteries and associated systems and methods | |
| CN109738827A (en) | Portable battery checks box and its application | |
| CN207269147U (en) | Micro-capacitance sensor voltage protective device | |
| CN205594121U (en) | Transmission line trouble on - line monitoring device | |
| CN206420961U (en) | Computer room ground resistance aggregation of data monitoring device | |
| CN208224763U (en) | Based on monolithic processor controlled voltage check device | |
| CN210514558U (en) | Electric automobile power battery information monitoring devices | |
| CN219161502U (en) | Indoor temperature monitoring equipment and system | |
| JPH07240236A (en) | Charging control and capacity detecting method for secondary battery | |
| CN218675131U (en) | Power consumption detection device of lithium battery protection board and lithium battery protection board device | |
| CN204558814U (en) | Ammeter socket | |
| CN213457289U (en) | Electric quantity detection circuit for robot |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |