CN110927596A - Vehicle-mounted storage battery residual electric quantity sensor - Google Patents
Vehicle-mounted storage battery residual electric quantity sensor Download PDFInfo
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- CN110927596A CN110927596A CN201911210294.XA CN201911210294A CN110927596A CN 110927596 A CN110927596 A CN 110927596A CN 201911210294 A CN201911210294 A CN 201911210294A CN 110927596 A CN110927596 A CN 110927596A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/387—Determining ampere-hour charge capacity or SoC
- G01R31/388—Determining ampere-hour charge capacity or SoC involving voltage measurements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
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Abstract
The invention provides a vehicle-mounted storage battery residual electric quantity sensor, and relates to the field of automobile industry. The vehicle-mounted storage battery residual electric quantity sensor comprises a shell and an EBS system, wherein a shunt is fixedly connected to the bottom of the shell, a pole clamp is fixedly connected to the bottom of the shunt, a grounding sheet is fixedly connected to the rear side wall of the shell, a PCB is arranged inside the shell and is fixedly connected with the shell through a rubber piece, a cover plate is fixedly connected to the top of the shell, the shape of the cover plate corresponds to the top structure of the shell, and the EBS system mainly comprises an EBS special integrated circuit, a BSD battery state detection internal logic algorithm circuit, system software, system hardware and a mechanical part. Through reasonable design and algorithm, the measurement principle of each parameter of the EBS sensor conforms to the specification, the load continuous current is ensured to be 150A, a reasonable current calculation mode is adopted, and meanwhile, the reaction speed of the device in the use process is greatly improved.
Description
Technical Field
The invention relates to the technical field of automobile industry, in particular to a vehicle-mounted storage battery residual electric quantity sensor.
Background
With the wide application of the idling start-stop function in automobiles, how to accurately, real-timely and reliably estimate the state of the storage battery, so that the service life of the storage battery is effectively prolonged, and the method becomes a key technical problem faced by a vehicle-mounted start-stop system. In order to accurately grasp the state of the storage battery in real time by the vehicle-mounted start-stop system, avoid the occurrence of the idle start-stop failure and effectively improve the service life of the storage battery, the state of charge (SOC), the state of health (SOH), the state of function (SOF, StateofFunction) and the temperature model (battery temperature model) of the storage battery need to be monitored, predicted and estimated. State of charge (SOC): the proportion of the actually stored electric quantity of the storage battery to the rated capacity is adopted (the storage battery capacity is in accordance with the 20h discharge rate at 25 ℃); state of health (SOH): the ratio of the actual maximum electric quantity storage capacity to the rated capacity is considered due to the aging factor of the storage battery; functional State (SOF): is a predicted value which predicts the lowest starting voltage that the present battery can provide. The functional state takes into account the age, temperature, internal resistance of the battery and the current required for starting the engine. The state of function (SOF) is critical to start-stop systems and is directly related to the relevant control strategy. Temperature Model (BTM): used to calculate the temperature of the electrolyte of the battery.
However, the existing vehicle-mounted battery remaining capacity sensor generally has certain defects in function when in use, and a phenomenon that the remaining capacity cannot be accurately measured may occur.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a vehicle-mounted storage battery residual capacity sensor, which solves the problem that the residual capacity of the existing vehicle-mounted storage battery is not measured accurately enough.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a vehicle-mounted storage battery residual capacity sensor, includes casing, EBS system, its characterized in that: the bottom fixedly connected with shunt of casing, the bottom fixedly connected with utmost point of shunt presss from both sides, the rear side wall fixedly connected with grounding plate of casing, the inside of casing is provided with PCB.
Preferably, the PCB is fixedly connected with the housing through a glue member.
Preferably, the top of the housing is fixedly connected with a cover plate, and the shape of the cover plate corresponds to the top structure of the housing.
Preferably, the EBS system mainly comprises an EBS special integrated circuit, a BSD battery state detection internal logic algorithm circuit, system software, system hardware and a mechanical part, the EBS is connected with an LIN network (A connection hole site) and a storage battery positive power supply end (E connection hole site) through a wire harness connector, an LIN signal is directly connected with a main control ECU (BSI) (the BSI can be connected with a garage maintenance tester) through an LIN wire, and can be connected with an extensible LIN network communication platform (comprising a debugging tool, a repair tool, a general assembly offline detection programming tool and a tester)
Preferably, the EBS asic includes a 16-bit AD sampling analog-to-digital converter, a digital signal processing chip (DSP, Nc chip), a multiplexer, a temperature sensor, a programmable gain amplifier, and a microcontroller.
The working principle is as follows: the main function of the EBS is to determine battery current, voltage and temperature, and to calculate battery condition from these values. The state calculation is realized by a special Battery State Detection (BSD) algorithm. The battery current, voltage and temperature, and the data output of the BSD algorithm are transmitted to the master control unit ecu (bsi) via the LIN communication bus. In the absence of a battery on the vehicle or with an unusable battery fitted, vehicle operation may negatively impact the service life and function of the alternator and vehicle electrical system. If the battery function is not sufficient or the battery is not available, as diagnosed from the signal sent from the EBS, a prompt and warning are given to the client during driving. (EBS does not have any function to shut down any customer load. this shutdown function is provided by the other control units)
During voltage measurement, after voltage signals of the storage battery pass through the multi-way switch and are subjected to digital comparison and conversion and microcontroller operation processing through a 16-bit AD sampling analog-to-digital converter, the result is output to the LIN network (the voltage and temperature signals are measured by the 16-bit AD sampling analog-to-digital converter and the microcontroller together)
During temperature measurement, the temperature sensor is integrated in the special integrated circuit of EBS, the voltage and temperature measurement channels share one multi-way switch, the sampling comparison circuit and the operation circuit of the temperature signal measurement channel are the same as the voltage measurement channel (the temperature signal is processed by digital comparison and conversion and microcontroller operation through a 16-bit AD sampling analog-to-digital converter, and the result is output to LIN network)
And current measurement, wherein a voltage signal is generated after the load current passes through a resistor of a shunt, the voltage signal is conditioned by an EBS internal sampling input circuit, then the voltage signal is amplified by a programmable gain amplifier, then the amplified voltage signal is input into a 16-bit AD sampling analog-to-digital converter, the operational output value of the load current is obtained by the logic algorithm operation of a digital signal processing chip (DSP and Nc chip) after the analog-to-digital conversion, and finally the operational output value of the load current is output to the LIN network.
And (3) electric quantity calculation:
(1) operational mode of EBS
There are two modes of operation of EBS: an active mode and an interrupt stop mode, wherein the active mode is further divided into a LIN mode and a monitor mode.
In the active mode, the EBS measures the voltage value, the current value of the battery and updates the BSD data. In the LIN mode, data of BSD of EBS is continuously calculated and exchanged with the outside through the LIN network; in the monitor mode, the EBS continuously checks whether the conditions for transitioning to the stop mode are satisfied: as long as the conditions are not met, the EBS remains activated and continuously measures the battery voltage U, current I, temperature d, and continuously updated BSD data. The EBS automatically enters the monitor mode upon power-on reset.
(2) State of Charge (Soc) calculation
Calculation of state of charge (SOC):
definition of state of charge (SOC): SOC = Q _ T25_120 (rated capacity of I20 discharge current capacity at 25 ℃)/C _ nom (rated capacity).
Q _ T25_ I20 is energy which can be recovered by charging and can be obtained from a storage battery when discharged to an open circuit voltage of 10.5V at 25 ℃ and room temperature with I20 discharge current.
C _ nom is the rated capacity of the battery.
The determination of the SOC value depends on the accuracy of the measured voltage, current, and battery temperature. The SOC value is continuously calculated in the LIN network mode. In the monitoring mode, the SOC value is updated at least once per hour. (3) Rapid determination of SOC values
The EBS performs a so-called fast SOC once after the power-on reset. The purpose of the fast SOC calculation is to obtain an initial SOC value after power-on reset, and the strategy is based on measuring the battery voltage, the battery current sum, and the determined battery temperature and the calibrated battery SOC-OCV (open circuit voltage) curve of the battery. If the battery is not charged and discharged at least 24 hours before the rapid SOC calculation, the error range tolerance of the rapid SOC determination is less than +/-15%.
Requirement of accurate and fast SOC: executing storage battery coding; the load current is less than 20A during power-on reset; SOC value is more than 30%; the temperature of the storage battery is room temperature.
If no valid battery type and BSD data have been encoded for writing to memory before a fast SOC calculation, the fast SOC process uses default battery parameters for calculation.
The EBS compares the battery voltage samples at the first second and tenth second of voltage after power-on reset, and if the voltage value measured at the 10 th second is higher than 1 st 20mV and is less than 13.5V, the software will initiate a new and rapid SOC calculation (by triggering a battery state detection BSD reset). U _ 10s > U _ 1s and U _ 10s <13.5V- > BSD reset, a new round of fast SOC calculation. During the re-initialization of the BSD (approximately 2 s), the EBS sends the most recently calculated fast SOC value onto the LIN network.
(III) advantageous effects
The invention provides a vehicle-mounted storage battery residual electric quantity sensor. The method has the following beneficial effects:
1. the measurement principle of each parameter of the EBS sensor (arranged on a battery pole) accords with the regulation, and the continuous current of the load is ensured to be 150A.
2. And a reasonable current calculation mode is adopted, so that the reaction speed of the device in the use process is greatly improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an exploded view of the structure of the present invention;
FIG. 3 is a flow chart of the electrical connection of the present invention;
FIG. 4 is a flow chart of voltage and temperature measurements according to the present invention;
FIG. 5 is a flow chart of current measurement according to the present invention.
Wherein, 1, a shell; 2. a flow divider; 3. a pole clamp; 4. a ground plate; 5. a rubber part; 6. a PCB; 7. and (7) a cover plate.
A specific embodiment;
the technical solutions in the embodiments of the present invention will be clearly and completely described below 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.
Example (b):
as shown in fig. 1 to 5, an embodiment of the present invention provides a vehicle-mounted remaining battery power sensor, which includes a housing 1 and an EBS system, wherein a shunt 2 is fixedly connected to a bottom of the housing 1, a pole clamp 3 is fixedly connected to a bottom of the shunt 2, a ground strip 4 is fixedly connected to a rear side wall of the housing 1, and a PCB6 is disposed inside the housing 1.
Wherein the PCB6 is fixedly connected with the housing 1 by the glue 5.
Wherein the top of the shell 1 is fixedly connected with a cover plate 7, and the shape of the cover plate 7 corresponds to the top structure of the shell 1.
The EBS system mainly comprises an EBS special integrated circuit, a BSD battery state detection internal logic algorithm circuit, system software, system hardware and a mechanical part, wherein the EBS is connected with an LIN network (A connection hole site) and a storage battery positive power supply end (E connection hole site) through a wire harness connector, an LIN signal is directly connected with a main control ECU (BSI) (the BSI can be connected with a garage maintenance tester) through an LIN wire, and the LIN signal can be connected with an extensible LIN network communication platform (comprising a debugging tool, a repair tool, a main assembly offline detection programming tool and a tester).
The EBS special integrated circuit comprises a 16-bit AD sampling analog-to-digital converter, a digital signal processing chip (DSP and Nc chip), a multi-channel switch, a temperature sensor, a programmable gain amplifier and a microcontroller.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a vehicle-mounted storage battery residual capacity sensor, includes casing (1) and EBS system, its characterized in that: the bottom fixedly connected with shunt (2) of casing (1), the bottom fixedly connected with utmost point of shunt (2) presss from both sides (3), the rear side wall fixedly connected with grounding plate (4) of casing (1), the inside of casing (1) is provided with PCB (6).
2. The vehicle-mounted battery remaining capacity sensor according to claim 1, characterized in that: the PCB (6) is fixedly connected with the shell (1) through a rubber piece (5).
3. The vehicle-mounted battery remaining capacity sensor according to claim 1, characterized in that: the top of the shell (1) is fixedly connected with a cover plate (7), and the shape of the cover plate (7) corresponds to the top structure of the shell (1).
4. The vehicle-mounted battery remaining capacity sensor according to claim 1, characterized in that: the EBS system mainly comprises an EBS special integrated circuit, a BSD battery state detection internal logic algorithm circuit, system software, system hardware and a mechanical part, wherein the EBS is connected with an LIN network (A connection hole site) and a storage battery positive power supply end (E connection hole site) through a wire harness connector, an LIN signal is directly connected with a main control ECU (BSI) (the BSI can also be connected with a garage maintenance tester) through an LIN wire, and the LIN signal can also be connected with an extensible LIN network communication platform (comprising a debugging tool, a repair tool, a main assembly offline detection programming tool and a tester).
5. The vehicle-mounted battery remaining capacity sensor according to claim 4, characterized in that: the EBS special integrated circuit comprises a 16-bit AD sampling analog-to-digital converter, a digital signal processing chip (DSP and Nc chip), a multi-channel switch, a temperature sensor, a programmable gain amplifier and a microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911210294.XA CN110927596A (en) | 2019-12-02 | 2019-12-02 | Vehicle-mounted storage battery residual electric quantity sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911210294.XA CN110927596A (en) | 2019-12-02 | 2019-12-02 | Vehicle-mounted storage battery residual electric quantity sensor |
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| CN110927596A true CN110927596A (en) | 2020-03-27 |
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| CN201911210294.XA Pending CN110927596A (en) | 2019-12-02 | 2019-12-02 | Vehicle-mounted storage battery residual electric quantity sensor |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543299A (en) * | 2012-07-09 | 2014-01-29 | 现代摩比斯株式会社 | Clamp terminal and batter sensor module comprising the clamp terminal |
| CN205720589U (en) * | 2016-03-29 | 2016-11-23 | 李秋生 | Intelligent battery electrical quantity sensor |
| CN206400075U (en) * | 2016-12-29 | 2017-08-11 | 上海海拉电子有限公司 | A kind of intelligent battery sensor |
| CN206975189U (en) * | 2017-07-01 | 2018-02-06 | 江门市英合创展电子有限公司 | A kind of intelligent battery sensor |
| CN209460379U (en) * | 2018-12-04 | 2019-10-01 | 常州市常超电子研究所有限公司 | Battery charge sensor circuit |
-
2019
- 2019-12-02 CN CN201911210294.XA patent/CN110927596A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543299A (en) * | 2012-07-09 | 2014-01-29 | 现代摩比斯株式会社 | Clamp terminal and batter sensor module comprising the clamp terminal |
| CN205720589U (en) * | 2016-03-29 | 2016-11-23 | 李秋生 | Intelligent battery electrical quantity sensor |
| CN206400075U (en) * | 2016-12-29 | 2017-08-11 | 上海海拉电子有限公司 | A kind of intelligent battery sensor |
| CN206975189U (en) * | 2017-07-01 | 2018-02-06 | 江门市英合创展电子有限公司 | A kind of intelligent battery sensor |
| CN209460379U (en) * | 2018-12-04 | 2019-10-01 | 常州市常超电子研究所有限公司 | Battery charge sensor circuit |
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