CN111781522B - Storage battery detection method, equipment and storage medium - Google Patents
Storage battery detection method, equipment and storage medium Download PDFInfo
- Publication number
- CN111781522B CN111781522B CN202010670555.2A CN202010670555A CN111781522B CN 111781522 B CN111781522 B CN 111781522B CN 202010670555 A CN202010670555 A CN 202010670555A CN 111781522 B CN111781522 B CN 111781522B
- Authority
- CN
- China
- Prior art keywords
- storage battery
- discharge
- current
- discharging
- battery
- 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
-
- 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]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
-
- 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]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
-
- 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]
- G01R31/371—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with remote indication, e.g. on external chargers
-
- 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]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
Abstract
The invention relates to the technical field of batteries, and discloses a storage battery detection method, equipment and a storage medium, wherein a first driving signal and a second driving signal are respectively output to a discharging module of a storage battery, so that the discharging module respectively generates a first discharging current and a second discharging current, wherein the first discharging current is larger than the second discharging current, so that the discharging module is driven to respectively generate large discharging current and small discharging current, and noise interference generated by other equipment on a vehicle is reduced through the large discharging current and the small discharging current; and the first discharge voltage and the second discharge voltage of the storage battery at the first discharge current and the second discharge current are collected, so that the internal resistance of the storage battery is obtained according to the circuit parameters of the discharge module at the large discharge current and the small discharge current, and the detection accuracy of the storage battery is improved.
Description
Technical Field
The present invention relates to the field of battery technologies, and in particular, to a method and an apparatus for detecting a storage battery, and a storage medium.
Background
Batteries are an essential part of the operation of devices, such as the most common lead-acid batteries for electric vehicles, not only for starting the vehicle, but also for supporting all the electronic loads on the vehicle, such as ECUs and the like. With the use of the storage battery, the storage battery may have health problems such as damage, bad condition, insufficient electric quantity and the like, so that the vehicle cannot run normally, and therefore, it is very important to be able to judge the health state of the storage battery in advance.
Generally, the quality of the storage battery is mainly determined by detecting the internal resistance of the storage battery through a conductivity test, and then judging the health state of the storage battery. However, with the intelligent development of automobiles, more and more devices still get electricity from the storage battery even when the automobile is turned off, which will interfere with the detection of the storage battery on the automobile, resulting in inaccurate detection, and the storage battery with good health status can be misjudged as an aged battery in serious cases.
Disclosure of Invention
An object of the embodiments of the present invention is to provide a method, device and storage medium for detecting a storage battery, which can improve anti-noise interference, improve accuracy of detection of the storage battery, and reduce erroneous determination.
In order to solve the technical problems, the invention provides the following technical scheme:
in a first aspect, an embodiment of the present invention provides a method for detecting a storage battery, where the method includes:
outputting a first driving signal to drive a discharging module of the storage battery to generate a first discharging current;
acquiring a first discharge voltage of the storage battery when the storage battery works at the first discharge current;
outputting a second driving signal to drive a discharging module of the storage battery to generate a second discharging current, wherein the first discharging current is larger than the second discharging current;
acquiring a second discharge voltage of the storage battery when the storage battery works at the second discharge current;
and acquiring the internal resistance of the storage battery according to the first discharge current, the first discharge voltage, the second discharge current and the second discharge voltage to form a measurement period, and determining the health state of the storage battery according to the internal resistance.
Optionally, the obtaining a first discharge voltage of the storage battery when the storage battery operates at the first discharge current includes:
controlling the discharging module to work for a first preset time under the first discharging current;
sampling a plurality of discharge voltages of the storage battery when the storage battery works at the first discharge current within the first preset time;
and averaging the plurality of discharge voltages when the first discharge current works to obtain a first discharge voltage of the storage battery.
Optionally, the obtaining a second discharge voltage of the storage battery when the storage battery operates at the second discharge current includes:
controlling the discharging module to work for a second preset time under the second discharging current;
sampling a plurality of discharge voltages of the storage battery when the storage battery works at the second discharge current within the second preset time;
and averaging the plurality of discharge voltages when the second discharge current works to obtain a second discharge voltage of the storage battery.
Optionally, before the outputting the first driving signal to drive the discharging module of the storage battery to generate the first discharging current, the method further includes:
and acquiring the specification parameters of the storage battery.
Optionally, the obtaining the internal resistance of the storage battery according to the first discharge current, the first discharge voltage, the second discharge current, and the second discharge voltage includes:
calculating the internal resistance R of the storage battery according to the following formula:
wherein, V L Is the first discharge voltage, V S Is the second discharge voltage, I S Is the first discharge current, I L Is the second discharge current.
Optionally, the specification parameter comprises a bias voltage of the battery;
the obtaining the internal resistance of the storage battery according to the first discharge current, the first discharge voltage, the second discharge current and the second discharge voltage includes:
calculating the internal resistance R of the storage battery according to the following formula:
R L ＝(V L -V deflection )/I L ,
R S ＝(V S -V Deflection )/I S ,
R＝(R L +R S )/2,
Wherein, V L Is the first discharge voltage, V S Is the second discharge voltage, I S Is the first discharge current, I L Is the second discharge current, R L Is the internal resistance value, R, of the battery in operation at the first discharge current S And the internal resistance value of the storage battery when the storage battery works at the second discharge current is obtained.
Optionally, the method further comprises:
repeating a plurality of the measurement cycles to obtain internal resistances of a plurality of the storage batteries;
and averaging the internal resistances to obtain an average internal resistance so as to determine the health state of the storage battery according to the average internal resistance.
In a second aspect, an embodiment of the present invention provides a battery detection apparatus, where the apparatus includes:
the discharging module is respectively connected with the positive electrode and the negative electrode of the storage battery to form a discharging loop of the storage battery;
the voltage sampling module is respectively connected with the anode and the cathode of the storage battery and is used for sampling the discharge voltage of the storage battery;
and the main controller is respectively connected with the discharging module and the voltage sampling module and can execute any one of the methods.
Optionally, the apparatus further comprises:
the input module is connected with the main controller and used for inputting the specification parameters of the storage battery;
the display module is connected with the main controller and used for displaying the specification parameters and the health state of the storage battery;
and the wireless communication module is connected with the main controller and used for sending the specification parameters and the health state data of the storage battery to a cloud backup.
Optionally, the discharge module comprises a current sampling circuit and a load regulation circuit;
the first end of the current sampling circuit is connected with the negative electrode of the storage battery, the second end of the current sampling circuit is connected with the main controller, and the third end of the current sampling circuit is connected with the load adjusting circuit;
the first end of the load adjusting circuit is connected with the third end of the current sampling circuit, the second end of the load adjusting circuit is connected with the main controller, and the third end of the load adjusting circuit is connected with the positive electrode of the storage battery.
Optionally, the current sampling circuit comprises a first operational amplifier and a sampling load;
the negative pole of battery is connected in first node, the syntropy input that first fortune was put the one end of sampling load reaches the second node is connected to the syntropy input that first fortune was put the other end of sampling load reaches load regulating circuit's first end, the output that first fortune was put with main control unit connects.
Optionally, the load regulation circuit includes a second operational amplifier and a MOS transistor;
the positive input end of the second operational amplifier is connected with the main control, the reverse input end of the second operational amplifier is connected with the second node, and the output end of the second operational amplifier is connected with the grid electrode of the MOS tube;
and the source electrode of the MOS tube is connected with the second node, and the drain electrode of the MOS tube is connected with the anode of the storage battery.
Optionally, the voltage sampling module includes a third operational amplifier, a homodromous input end of the third operational amplifier is connected with the positive electrode of the storage battery, a reverse input end of the third operational amplifier is connected with the negative electrode of the storage battery, and an output end of the third operational amplifier is connected with the main controller.
In a third aspect, embodiments of the present invention provide a computer-readable storage medium storing a computer-executable program, which, when executed by a processor, causes the computer to perform any of the methods described above.
Compared with the conventional technology, in the storage battery detection method, the storage battery detection device and the storage medium provided by the embodiments of the present invention, the first driving signal and the second driving signal are respectively output to the discharging module of the storage battery, so that the discharging module generates the first discharging current and the second discharging current, respectively, wherein the first discharging current is greater than the second discharging current, so that the discharging module is driven to generate the large discharging current and the small discharging current, respectively, and the noise interference generated by other devices on the vehicle is reduced by the large discharging current and the small discharging current; and collecting a first discharge voltage and a second discharge voltage of the storage battery when the storage battery is at the first discharge current and the second discharge current, and further acquiring the internal resistance of the storage battery according to the circuit parameters of the discharge module when the storage battery is at the large discharge current and the small discharge current, so that the detection accuracy of the storage battery is improved.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic structural diagram of a battery detection system according to an embodiment of the present invention;
fig. 2a is a schematic structural diagram of a storage battery detection apparatus according to an embodiment of the present invention;
fig. 2b is a schematic structural diagram of another battery detection apparatus according to an embodiment of the present invention;
fig. 2c is a schematic structural diagram of another battery detection apparatus according to an embodiment of the present invention;
fig. 2d is a schematic circuit structure diagram of a storage battery detection apparatus according to an embodiment of the present invention;
fig. 3a is a schematic flow chart of a method for detecting a storage battery according to an embodiment of the present invention;
FIG. 3b is a schematic flow chart illustrating another method for testing a battery according to an embodiment of the present invention;
fig. 3c is a schematic flow chart of another battery detection method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict. The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
As can be appreciated, as the battery is used, the battery ages and the capacity of the battery decreases. When the battery capacity is lower than 80% of the rated battery capacity, the battery capacity may drop in a diving manner, so that the loading capacity of the storage battery is insufficient, and the storage battery may be scrapped at any time. Therefore, it is important to know the state of health of the battery.
Referring to fig. 1, a system 100 of a battery detection system according to an embodiment of the present invention includes a battery 10 and a battery detection device 20, where the battery 10 is electrically connected to the battery detection device 20, and the battery detection device 20 is configured to detect an electrical parameter of the battery 10 to determine a state of health of the battery 10.
The secondary battery 10 is a device that directly converts chemical energy into electric energy and performs recharging through a reversible chemical reaction, i.e., internal active materials are regenerated using external electric energy during charging, electric energy is stored as chemical energy, and chemical energy is converted into electric energy again to be output when discharging is required. The battery 10 includes one or more cells, and generally, a rated voltage of one cell is 2V, and the plurality of cells may be connected in series or in parallel, so that the rated voltage of the battery 10 may be 2v,4v, 6V, 8V, 12V, 24V, and so on. For example, a vehicle storage battery is generally a battery pack in which 6 lead storage cells are connected in series to form a rated voltage of 12V for a small-sized vehicle, or a battery pack in which 12 lead storage cells are connected in series to form a rated voltage of 24V for a large-sized vehicle. It is understood that the vehicle battery may be designed to have other specifications according to actual conditions.
After the storage battery 10 undergoes multiple charging and discharging, health problems such as loss, bad cells (damaged cells), insufficient electric quantity and the like may occur, so that the vehicle cannot normally run, therefore, it is very important to judge the health state of the storage battery 10 in advance, and a user can clearly know the condition of the storage battery 10, thereby avoiding the risk of starting and running. The state of health of the battery 10 is an index for evaluating the operating capability of the battery 10, and may include, for example, whether scrap is approaching (bad battery), whether bad cells are present (bad battery), whether sound (good battery), or whether the amount of electricity is sufficient (insufficient battery). The state of health of the battery 10 may affect electrical parameters of the battery 10, such as a voltage drop when a cell is broken.
In the embodiment of the present invention, the battery 10 is in an online loaded state, specifically, the battery 10 is not detached from the vehicle, and there is a power supply relationship between the battery 10 and other devices on the vehicle. Since the internal resistance of the battery 10 is small, it is easily interfered by noise from other devices in the vehicle during the detection process, and therefore, it is important to reduce the noise interference.
The battery detection device 20 is electrically connected to the battery 10, and the battery detection device 20 is configured to measure electrical parameters of the battery 10, where the electrical parameters include basic parameters such as voltage and current, and may further include parameters derived from the voltage and the current, such as internal resistance and Cold Cranking Ampere (CCA). Further, the battery detection device 20 can determine the health status of the battery 10 according to the electrical parameters.
In some embodiments, the system 100 further includes a kelvin connector 30, and the battery test device 20 is electrically connected to the battery 10 through the kelvin connector 30.
Specifically, referring to fig. 2a to 2d, the battery detection apparatus 20 includes a discharging module 21, a voltage sampling module 22 and a main controller 23, wherein the main controller 23 is electrically connected to the discharging module 21 and the voltage sampling module 22, respectively.
The discharging module 21 is respectively connected to the positive electrode a + and the negative electrode a-of the storage battery 10 to form a discharging loop of the storage battery 10, and detects a voltage signal and/or a current signal when the storage battery 10 discharges in a discharging process of the storage battery 10. Specifically, a load is disposed in the discharge loop, the storage battery 10 releases electric energy to the load in the discharge loop, and a current signal flowing through the load can be obtained according to ohm's law by sampling voltage signals at two ends of the load, so as to obtain a current signal of the discharge loop, where the current signal is a current flowing from a negative electrode a-to a positive electrode a + in the storage battery 10 when the current is loaded.
In some embodiments, referring to fig. 2b, the discharging module 21 further includes a current sampling circuit 211 and a load adjusting circuit 212, wherein a first terminal of the current sampling circuit 211 is connected to the negative electrode a-of the battery 10, a second terminal thereof is connected to the main controller 23, and a third terminal thereof is connected to the load adjusting circuit 212. The main controller 23 samples the current signal in the discharging module 21 through the current sampling circuit 211.
Specifically, referring to fig. 2d, the current sampling circuit 211 includes a first operational amplifier U1 and a sampling load R, an inverting input terminal of the first operational amplifier U1, one end of the sampling load R, and a negative electrode a-of the battery 10 are connected to a first node P1, a non-inverting input terminal of the first operational amplifier U1, the other end of the sampling load R, and a first end of the load adjusting circuit 212 are connected to a second node P2, and an output terminal of the first operational amplifier U1 is connected to an ADC interface of the main controller 23. Therefore, the voltage at the first end of the sampling load R is input to the in-phase end of the first operational amplifier U1, the voltage at the second end of the sampling load R is input to the inverting end of the first operational amplifier U1, the voltage signals at the two ends of the sampling load R are obtained after the processing of the first operational amplifier U1, and the voltage signals are sent to the main controller 23, so that the main controller 23 can determine the current signal flowing through the sampling load R, that is, the discharge current of the discharge module 21, according to the resistance value of the sampling load R and the voltage signals. Preferably, the resistance value of the sampling load R is 10m Ω.
The first end of the load adjusting circuit 212 is connected with the third end of the current sampling circuit 211, the second end is connected with the main controller 23, the third end is connected with the anode a + of the storage battery 10, and the main controller 23 outputs a driving signal to the load adjusting circuit 212 according to the current signal sampled by the current sampling circuit 211 so as to adjust the load loaded by the discharging module 21, and further adjust the current signal of the discharging module 21, so that the discharging module 21 generates an expected current signal. Therefore, the main controller 23, the current sampling circuit 211 and the load adjusting circuit 212 constitute a closed-loop control circuit for the current in the discharging module 21, so that the control accuracy and stability of the battery detection device 20 are improved.
With reference to fig. 2d, the load adjusting circuit 212 includes a second operational amplifier U2 and a MOS transistor Q, wherein a forward input end of the second operational amplifier U2 is connected to the DAC interface of the main controller 23, a reverse input end of the second operational amplifier U2 is connected to the second node P2, and an output end of the second operational amplifier U2 is connected to a gate of the MOS transistor Q; the source electrode of the MOS transistor Q is connected to the second node P2, and the drain electrode of the MOS transistor Q is connected to the positive electrode a + of the battery 10.
In specific operation, the closed-loop control process of the discharge module 21 is as follows:
the storage battery detection device 20 is connected with the storage battery 21 to provide electric energy for the storage battery detection device 20, when the storage battery detection device 20 is initially powered on, the main controller 23 fails to output a driving signal to the discharge module 21, and at this time, the MOS transistor Q is in a disconnected state. When the main controller 23 sends a driving signal to the non-inverting input terminal of the second operational amplifier U2, the second operational amplifier U2 processes the driving signal and the voltage at the inverting input terminal of the second operational amplifier U2, and outputs a load adjusting signal to the gate of the MOS transistor Q, so that a voltage difference V is formed between the gate and the source of the MOS transistor Q GS . When the voltage difference V is GS When the voltage is higher than the turn-on voltage of the MOS transistor Q, the MOS transistor Q is turned on, the discharging module 21 and the storage battery 10 form a closed loop, and a discharging current signal is generated in the closed loop, so that the storage battery 10 starts to discharge.
After the MOS transistor Q is turned on, the main controller 23 continues to sample the discharge current signal of the discharge module 21 through the current sampling circuit 211, and when the discharge current signal does not reach an expected current signal, the main controller 23 adjusts the output driving signal to control the turn-on degree of the MOS transistor Q. It should be noted that, after the MOS transistor Q is in saturation conduction, there is a resistor with a very small resistance, which is equivalent to a linear resistor, and the resistance of the resistor, the voltage drop across the MOS transistor Q and the current flowing through the MOS transistor Q conform to ohm's law, so that the discharge current signal of the discharge module 21 can be adjusted by adjusting the resistance of the MOS transistor Q. Therefore, the main controller 23 can adjust the discharge current signal generated in the discharge module 21 by adjusting the output driving signal. Therefore, the main controller 23 collects a discharge current signal through the current sampling circuit 211 in real time, and outputs a driving signal according to the discharge current signal to adjust the conduction degree of the MOS transistor Q, so as to adjust the resistance value formed by the MOS transistor Q according to the conduction degree, and further adjust the load loaded by the discharge module 21, thereby enabling the discharge module 21 to generate a desired discharge current.
In still other embodiments, the discharging module 21 further includes a diode D1, an anode of the diode D1 is connected to the anode a + of the battery 10, a cathode of the diode D1 is connected to the drain of the MOS transistor Q, and the diode D1 is configured to prevent the discharging current from flowing back to the battery 10.
The voltage sampling module 22 is respectively connected with the positive electrode a + and the negative electrode a-of the storage battery and is used for sampling the discharge voltage of the storage battery. The discharge module 21 and the voltage sampling module 22 are connected to the positive electrode a + and the negative electrode a-of the battery by different leads, respectively, and for example, two leads provided with kelvin clips are led out from the positive electrode a + and the negative electrode a-of the battery by the four-wire system kelvin clips as described above, and are electrically connected to the discharge module 21 and the voltage sampling module 22, respectively.
Specifically, referring to fig. 2d, the voltage sampling module 22 includes a third operational amplifier U3, a homodromous input end of the third operational amplifier U3 is connected to the positive electrode a + of the storage battery 10, a reverse input end of the third operational amplifier U3 is connected to the negative electrode a-of the storage battery 10, and an output end of the third operational amplifier U3 is connected to the main controller 23. In this embodiment, the positive input end and the negative input end of the third operational amplifier U3 are respectively connected to the two poles of the battery 10, so that the third operational amplifier U3 is configured to collect the discharge voltage of the battery 10, and output the discharge voltage to the main controller 23 through the output end of the third operational amplifier U3, so that the main controller 23 collects the discharge voltage of the battery 10.
It should be noted that the load loaded by the discharge module 21 includes the resistance value formed by the sampling load R and the MOS transistor Q according to the conduction degree, wherein the resistance value formed by the sampling load R and the MOS transistor Q according to the conduction degree is connected in series in the discharge module 21, and thus the load loaded by the discharge module 21 is the sum of the resistance values formed by the sampling load R and the MOS transistor Q according to the conduction degree.
The main controller 23 is electrically connected to the discharging module 21 and the voltage sampling module 22, and configured to output a first driving signal to the discharging module 21 so as to generate a first discharging current in a discharging loop of the storage battery 10, and obtain a first discharging voltage of the storage battery 10 when the first discharging current works through the voltage sampling module 22; and outputting a second driving signal to the discharging module 21 to generate a second discharging current in a discharging loop of the storage battery 10, and obtaining a second discharging voltage of the storage battery 10 during operation of the second discharging current through the voltage sampling module 22, so as to calculate the internal resistance of the storage battery 10 according to the obtained first discharging current, the obtained first discharging voltage, the obtained second discharging current, and the obtained second discharging voltage, and by combining with an ohm law.
The master controller 23 includes, but is not limited to, a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), an ARM (Acorn RISC Machine), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof that supports ADC and DAC conversion functions; but may be any conventional processor, controller, microcontroller, or state machine that supports ADC and DAC conversion functions; or as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such computing device that supports ADC and DAC conversion functions.
In some embodiments, referring to fig. 2c, the battery detection apparatus 20 further includes an input module 24, a display module 25, a storage module 26, and a wireless communication module 27, and the main controller 23 is further electrically connected to the input module 24, the display module 25, the storage module 26, and the wireless communication module 27, respectively.
The input module 24 is configured to input specification parameters of the storage battery 10, preferably, the specification parameters include factory parameters, rated parameters (including a rated voltage), MMY information, VIN code information, and other data related to detection of the storage battery 10. After the main controller 23 obtains the specification parameters of the storage battery 10, the main controller can learn the current working state of the storage battery 10 by checking the measurement parameters and the specification parameters of the storage battery 10 when detecting the storage battery 10. The input module 24 includes, but is not limited to, an external device such as a mouse, a keyboard, etc.
The display module 25 is used for providing a relevant interactive interface for the user during the detection of the storage battery, and the main controller 23 displays the detection result, the work flow, the working parameters, the information prompt and other contents of the storage battery in the display module 25, so that the user can conveniently and quickly know the relevant information and data of the storage battery.
The storage module 26 is configured to store texts, protocols and other related resources required for battery detection, so as to implement detection on the battery 10; meanwhile, the storage module 26 is further configured to store detection data of the storage battery 10, including a starting characteristic curve, a voltage variation curve, a health detection record, a battery capacity calculation result, and the like of the storage battery.
The wireless communication module 27 is configured to send the specification parameters and the health status data of the storage battery to a cloud for backup. The Wireless Communication module 27 includes, but is not limited to, a Wireless Local Area Network (WLAN), a Wi-Fi network (Wireless Fidelity), bluetooth (Bluetooth, BT), a Global Navigation Satellite System (GNSS), frequency Modulation (FM), near Field Communication (NFC), infrared technology (Infrared, IR), and the like.
In the embodiment of the invention, a discharge module is connected with the positive electrode and the negative electrode of the storage battery to form a discharge loop of the storage battery; the voltage sampling module is connected with the anode and the cathode of the storage battery, so that the discharge voltage of the storage battery is sampled, the main controller drives the discharge module to respectively generate large and small discharge currents, and noise interference generated by other equipment on a vehicle is reduced through large and small discharge current signals; and the discharge voltage of the storage battery is collected when the discharge current is large and small, and then the internal resistance of the storage battery is obtained according to the circuit parameters of the discharge module when the discharge current is large and small, so that the detection accuracy of the storage battery is improved.
It should be noted that, the detection method according to the embodiment of the present invention uses the voltage drop value of the battery to determine whether the battery needs to be replaced, so that the detection method is suitable for any suitable circuit that can detect the voltage drop of the battery.
Referring to fig. 3a, a schematic flow chart of a battery detection method according to an embodiment of the present invention is shown, where the method can be applied to any suitable battery detection circuit, for example, the battery detection apparatus according to any embodiment described above is applied to an online vehicle battery as shown in fig. 3a, and the detection method includes:
s31, outputting a first driving signal to drive a discharging module of the storage battery to generate a first discharging current;
s32, acquiring a first discharge voltage of the storage battery when the storage battery works at the first discharge current;
the first discharging current is a current value preset by a user according to the current of the loaded storage battery, and in order to reduce noise interference generated by the loaded storage battery, the first discharging current is at least larger than the current of the loaded storage battery.
In some embodiments, the first discharge current may be preset according to the user's requirement, preferably 60A.
The first discharge voltage refers to a voltage difference between positive and negative poles of the storage battery when the current in the discharge module is the first discharge current.
In order to make the detected data of the first discharge voltage more stable and accurate, in some embodiments, referring to fig. 3b, step S32 includes:
s321, controlling the discharging module to work under the first discharging current for a first preset time;
the first preset time refers to the duration of the discharging of the storage battery with the first discharging current. In some embodiments, the preset time period is in milliseconds, preferably 3-100ms, for example, the first preset time is 3ms, 10ms, or 50 ms. The preset time period is related to the discharge current, for example, when the discharge current is larger, a shorter preset time period may be selected for discharging. Discharge through short length of predetermineeing, detect the state of health of the battery that awaits measuring, on the one hand, saved check-out time, can the short-term determination the state of health of the battery that awaits measuring has improved detection efficiency, on the other hand, it is the millisecond level to predetermine length of time, and the discharge time is short, can avoid the battery that awaits measuring produces a large amount of heats to, at the in-process that detects, do not need extra heat abstractor.
S322, sampling a plurality of discharge voltages of the storage battery in the first discharge current during operation within the first preset time;
s323, averaging a plurality of discharge voltages when the first discharge current works to obtain a first discharge voltage of the storage battery;
the plurality of discharge voltages are obtained by sampling the discharge voltages within a first preset time according to a certain sampling rate when the first discharge current works. For example, 50 discharge voltages are collected in a preset period of time 20ms during which the battery is discharged, an average value of the plurality of discharge voltages is calculated, and the average value is taken as the first discharge voltage.
Specifically, a first preset time is accumulated by means of a timer, and when the discharge time of the storage battery reaches the time length of the first preset time, the timer reaches a set stop threshold value to trigger the storage battery to stop discharging. And counting according to the sampling rate in a counter mode within the duration of the first preset time, namely in the discharging process of the storage battery, for example, sampling for one time every sampling rate, and stopping sampling until the counter reaches a stop threshold set in the timer.
In the embodiment of the invention, the discharge voltages of the storage batteries are collected within the first preset time, and the average value of the discharge voltages is used as the first discharge voltage, so that the error risk can be reduced, abnormal data can be discharged, and the accuracy of the discharge voltage can be improved.
S33, outputting a second driving signal to drive a discharging module of the storage battery to generate a second discharging current;
s34, acquiring a second discharge voltage of the storage battery when the storage battery works at the second discharge current;
the second discharging current is the same as the first discharging current, is a current value preset by a user according to the current when the storage battery is loaded, and the first discharging current is larger than the second discharging current. Preferably, the first discharge current is at least 5A greater than the second discharge current.
In still other embodiments, the second discharge current may be preset according to the user's requirement, preferably 20A.
The second discharge voltage is a voltage difference between positive and negative poles of the storage battery when the current in the discharge module is the second discharge current.
In order to make the detection data of the first discharge voltage more stable and accurate, in some embodiments, referring to fig. 3c, step S34 includes:
s341, controlling the discharging module to work for a second preset time under the second discharging current;
s342, sampling a plurality of discharge voltages of the storage battery in the second preset time when the storage battery works at the second discharge current;
s343, averaging a plurality of discharge voltages when the second discharge current works to obtain a second discharge voltage of the storage battery;
the second preset time refers to the duration of the discharging of the storage battery with the second discharging current. In some embodiments, the preset time period is in milliseconds, preferably 3-100ms, for example, the second preset time is 5ms, 20ms or 30 ms. It should be noted that the first preset time and the second preset time may be set to be the same time during setting, and may be specifically set according to the requirement of the user.
The plurality of discharge voltages are obtained by sampling the discharge voltages within a second preset time according to a certain sampling rate when the second discharge current works. For example, 30 discharge voltages are collected in a preset time period 10ms during which the battery is discharged, an average value of the discharge voltages is calculated, and the average value is taken as the second discharge voltage.
In the embodiment of the invention, the discharge voltages of the storage batteries are collected within the second preset time, and the average value of the discharge voltages is used as the second discharge voltage, so that the error risk can be reduced, abnormal data can be discharged, and the accuracy of the discharge voltage can be improved.
It should be noted that, in the above steps, the order of steps S31, S32 and steps S33, S34 may be changed, that is, the order of the above steps may be S31, S32, S33, S34, in the step of controlling, in the storage battery detection apparatus, a first discharge voltage at the time of a large discharge current is collected first, and then a second discharge voltage at the time of a small discharge current is collected; s33, S34, S31, and S32 may be used, so that the second discharge voltage at the time of the small discharge current is collected first, and the first discharge voltage at the time of the large discharge current is collected second.
S35, acquiring internal resistance of the storage battery according to the first discharge current, the first discharge voltage, the second discharge current and the second discharge voltage to form a measurement period, and determining the health state of the storage battery according to the internal resistance.
The health state of the storage battery refers to whether the storage battery can also drive other equipment in a vehicle to normally operate, and the evaluation parameters of the health state mainly comprise an internal resistance value, a battery capacity, CCA parameters and the like of the storage battery. The internal resistance of the storage battery refers to resistance to current flowing through the storage battery when the storage battery works. The smaller the internal resistance of the storage battery is, the stronger the discharge capacity of the storage battery is, and the more sufficient the discharge is. Conversely, the greater the internal resistance of the battery, the weaker the discharge capacity of the battery.
Therefore, the health condition of the storage battery can be judged by acquiring the internal resistance value of the storage battery. In some embodiments, after obtaining the first discharge current, the first discharge voltage, the second discharge current, and the second discharge voltage, the internal resistance R of the battery is calculated by the following formula:
wherein, V L Is the first discharge voltage, V S Is the second discharge voltage, I S Is the first discharge current is I L The second discharge current.
In this embodiment, after the first discharge current, the second discharge current, the first discharge voltage, and the second discharge voltage are subjected to differential operation, the internal resistance of the storage battery is calculated according to ohm's law, so that the detection precision of the internal resistance of the storage battery is improved, and the accurate measurement of the internal resistance of the storage battery in an online on-load state is realized.
It is understood that before starting the method for detecting the battery, the method further comprises:
and S30, acquiring the specification parameters of the storage battery.
Wherein the specification parameters include factory parameters, rated parameters (including rated voltage), MMY information, VIN code information and other data related to detection of the storage battery 10,
the rated parameters refer to the rated values of the storage battery, such as rated voltage, rated current, battery capacity and the like, which can be achieved during normal operation. The factory parameters include intrinsic parameters, where the intrinsic parameters are parameters that are not changed due to a use duration or a method, which are caused by a structure of the storage battery itself, for example, a bias voltage of the storage battery.
Thus, in still other embodiments, the specification parameter comprises a bias voltage of the battery; in order to improve the accuracy of the detection of the internal resistance of the storage battery, after the first discharge current, the first discharge voltage, the second discharge current and the second discharge voltage are obtained, the internal resistance R of the storage battery is calculated according to the following formula:
R L ＝(V L -V deflection )/I L ,
R S ＝(V S -V Deflection )/I S ,
R＝(R L +R S )/2,
Wherein, V L Is the first discharge voltage, V S Is the second discharge voltage, I S Is the first discharge current, I L Is the second discharge current, R L Is the internal resistance value, R, of the battery in operation at the first discharge current S And the internal resistance value of the storage battery when the storage battery works at the second discharge current is obtained.
In this embodiment, in consideration of the bias voltage carried by the storage battery, when calculating the internal resistance value of the storage battery, the value of the bias voltage is subtracted on the basis of the discharge voltage, then the internal resistance value of the storage battery is calculated according to the ohm's law, and the internal resistance value of the storage battery is obtained after averaging the internal resistance values obtained at high current and low current, so that the detection accuracy of the internal resistance of the storage battery is improved.
It should be noted that, in the steps of the above steps S31 to S35, the internal resistance detection of the battery is completed, so the above steps S31 to S35 may be used as a measurement cycle of the battery detection.
In order to further improve the detection accuracy of the internal resistance of the storage battery, in some embodiments, a plurality of measurement cycles are repeated, so that a plurality of internal resistance values of the storage battery can be obtained; and averaging the internal resistance values to obtain the average internal resistance of the storage battery, and determining the health state of the storage battery according to the average internal resistance.
In other embodiments, after the internal resistance of the storage battery is obtained, the CCA parameter of the storage battery is calculated according to the internal resistance value, so that the health state of the storage battery is determined according to the CCA parameter. Specifically, the CCA parameter may be CCA or CCA percentage, where CCA (Cold Cranking Ampere) is the Cold start current of the battery, which is the amount of current that the battery discharges continuously for 30 seconds before the voltage drops to the limit feeding voltage under a specified certain low temperature condition (usually specified at 0 ° f or-17.8 ℃). For example, a battery CCA of 550V means that the battery can continuously supply 550A of current for 30 seconds before the voltage drops to 7.2V after being fully charged and standing for 24 hours in an environment of-17.8 ℃. The CCA percentage is the ratio between the measured CCA and the nominal CCA.
As known to those skilled in the art, the CCA parameter has a certain proportionality coefficient α with the internal resistance R, i.e., CCA = α × R, so that the CCA and the CCA percentage can be obtained.
In the embodiment of the invention, a first driving signal and a second driving signal are respectively output to a discharging module of the storage battery, so that the discharging module respectively generates a first discharging current and a second discharging current, wherein the first discharging current is greater than the second discharging current, and therefore, the discharging module is driven to respectively generate large discharging current and small discharging current, and noise interference generated by other equipment on a vehicle is reduced through the large discharging current and the small discharging current; and collecting a first discharge voltage and a second discharge voltage of the storage battery when the storage battery is at the first discharge current and the second discharge current, and further acquiring the internal resistance of the storage battery according to the circuit parameters of the discharge module when the storage battery is at the large discharge current and the small discharge current, so that the detection accuracy of the storage battery is improved.
The above-described embodiments of the apparatus or device are only schematic, where the unit modules described as separate parts may or may not be physically separate, and the parts displayed as module units may or may not be physical units, may be located in one place, or may be distributed on multiple network module units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
Embodiments of the present invention provide a non-transitory computer-readable storage medium having stored thereon computer-executable instructions for execution by one or more processors, e.g., to perform the method steps of fig. 3 a-3 c described above.
Embodiments of the present invention provide a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to perform the ontology construction method in any of the above-described method embodiments, e.g. to perform the method steps of fig. 3a to 3c described above.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (11)
1. A battery testing method, the method comprising: outputting a first driving signal to drive a discharging module of the storage battery to generate a first discharging current;
acquiring a first discharge voltage of the storage battery when the storage battery works at the first discharge current;
outputting a second driving signal to drive a discharging module of the storage battery to generate a second discharging current, wherein the first discharging current is larger than the second discharging current;
acquiring a second discharge voltage of the storage battery when the storage battery works at the second discharge current;
acquiring the internal resistance of the storage battery according to the first discharge current, the first discharge voltage, the second discharge current and the second discharge voltage to form a measurement period, and determining the health state of the storage battery according to the internal resistance;
acquiring the bias voltage of the storage battery;
wherein the obtaining the internal resistance of the storage battery according to the first discharge current, the first discharge voltage, the second discharge current, and the second discharge voltage includes:
calculating the internal resistance R of the storage battery according to the following formula:
R L ＝(V L -V deflection )/I L ,
R S ＝(V S -V Deflection )/I S ,
R＝(R L +R S )/2,
Wherein, V L Is the first discharge voltage, V S Is the second discharge voltage, I S Is the first discharge current, I L Is the second discharge current, R L Is the internal resistance value, R, of the battery in operation at the first discharge current S And the internal resistance value of the storage battery when the storage battery works at the second discharge current is obtained.
2. The method of claim 1, wherein said obtaining a first discharge voltage of said battery while operating at said first discharge current comprises:
controlling the discharging module to work for a first preset time under the first discharging current;
sampling a plurality of discharge voltages of the storage battery when the storage battery works at the first discharge current within the first preset time;
and averaging the plurality of discharge voltages when the first discharge current works to obtain a first discharge voltage of the storage battery.
3. The method of claim 2, wherein said obtaining a second discharge voltage of said battery operating at said second discharge current comprises:
controlling the discharging module to work for a second preset time under the second discharging current;
sampling a plurality of discharge voltages of the storage battery when the storage battery works at the second discharge current within the second preset time;
and averaging the plurality of discharge voltages when the second discharge current works to obtain a second discharge voltage of the storage battery.
4. The method of claim 1, further comprising:
repeating a plurality of the measurement cycles to obtain internal resistances of a plurality of the storage batteries;
and averaging the internal resistances to obtain an average internal resistance so as to determine the health state of the storage battery according to the average internal resistance.
5. A battery testing apparatus, the apparatus comprising:
the discharging module is respectively connected with the positive electrode and the negative electrode of the storage battery to form a discharging loop of the storage battery;
the voltage sampling module is respectively connected with the positive electrode and the negative electrode of the storage battery and is used for sampling the discharge voltage of the storage battery;
a master controller connected to the discharge module and the voltage sampling module, respectively, the master controller being capable of performing the method of any one of claims 1-4.
6. The apparatus of claim 5, further comprising:
the input module is connected with the main controller and used for inputting the specification parameters of the storage battery;
the display module is connected with the main controller and used for displaying the specification parameters and the health state of the storage battery;
and the wireless communication module is connected with the main controller and used for sending the specification parameters and the health state data of the storage battery to a cloud backup.
7. The apparatus of claim 5, wherein the discharge module comprises a current sampling circuit and a load regulation circuit;
the first end of the current sampling circuit is connected with the negative electrode of the storage battery, the second end of the current sampling circuit is connected with the main controller, and the third end of the current sampling circuit is connected with the load adjusting circuit;
the first end of the load adjusting circuit is connected with the third end of the current sampling circuit, the second end of the load adjusting circuit is connected with the main controller, and the third end of the load adjusting circuit is connected with the positive electrode of the storage battery.
8. The apparatus of claim 7, wherein the current sampling circuit comprises a first op amp and a sampling load;
the negative pole of battery is connected in first node, the syntropy input that first fortune was put, the one end of sampling load and the first end of load regulating circuit is connected in the second node, the output that first fortune was put with main control unit connects.
9. The apparatus of claim 8, wherein the load regulation circuit comprises a second operational amplifier and a MOS transistor;
the positive input end of the second operational amplifier is connected with the main control, the reverse input end of the second operational amplifier is connected with the second node, and the output end of the second operational amplifier is connected with the grid electrode of the MOS tube;
and the source electrode of the MOS tube is connected with the second node, and the drain electrode of the MOS tube is connected with the anode of the storage battery.
10. The device of claim 9, wherein the voltage sampling module comprises a third operational amplifier, wherein a homodromous input terminal of the third operational amplifier is connected with a positive electrode of the storage battery, a reverse input terminal of the third operational amplifier is connected with a negative electrode of the storage battery, and an output terminal of the third operational amplifier is connected with the main controller.
11. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer-executable program which, when executed by a processor, causes the computer to perform the method of any one of claims 1-4.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010670555.2A CN111781522B (en) | 2020-07-13 | 2020-07-13 | Storage battery detection method, equipment and storage medium |
| PCT/CN2021/105878 WO2022012487A1 (en) | 2020-07-13 | 2021-07-13 | Storage battery detection method and device, and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010670555.2A CN111781522B (en) | 2020-07-13 | 2020-07-13 | Storage battery detection method, equipment and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111781522A CN111781522A (en) | 2020-10-16 |
| CN111781522B true CN111781522B (en) | 2022-11-25 |
Family
ID=72768524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010670555.2A Active CN111781522B (en) | 2020-07-13 | 2020-07-13 | Storage battery detection method, equipment and storage medium |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111781522B (en) |
| WO (1) | WO2022012487A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111781522B (en) * | 2020-07-13 | 2022-11-25 | 深圳市道通科技股份有限公司 | Storage battery detection method, equipment and storage medium |
| WO2023070307A1 (en) * | 2021-10-26 | 2023-05-04 | 宁德时代新能源科技股份有限公司 | Battery pack and electrical device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105807230A (en) * | 2016-03-11 | 2016-07-27 | 郑贵林 | Storage battery residual capacity and health state rapid detection method and device |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6469512B2 (en) * | 2000-01-12 | 2002-10-22 | Honeywell International Inc. | System and method for determining battery state-of-health |
| JP2002313435A (en) * | 2001-04-18 | 2002-10-25 | Matsushita Electric Ind Co Ltd | Battery inspection method |
| JP4193745B2 (en) * | 2004-04-12 | 2008-12-10 | 新神戸電機株式会社 | Battery state detection method and battery state detection device |
| CN202815191U (en) * | 2012-08-22 | 2013-03-20 | 北京群菱能源科技有限公司 | Storage battery internal resistance measuring device |
| CN205091395U (en) * | 2015-11-13 | 2016-03-16 | 江苏省电力公司无锡供电公司 | Internal resistance of cell's device is measured to loss -of -charge method |
| CN205157652U (en) * | 2015-11-23 | 2016-04-13 | 上海电力学院 | Direct current undercurrent secondary discharge holds internal resistance of cell on -line measuring device |
| CN105510833B (en) * | 2015-11-27 | 2018-08-07 | 马发清 | Accumulator method for detecting health status, apparatus and system |
| CN107782974A (en) * | 2017-10-23 | 2018-03-09 | 北京大城绿川科技有限公司 | A kind of accumulator internal resistance online test method and device |
| CN108008312A (en) * | 2017-11-27 | 2018-05-08 | 广州市扬新技术研究有限责任公司 | Storage battery group state on-line measurement circuit and method |
| CN109596996A (en) * | 2019-01-11 | 2019-04-09 | 深圳市爱克斯达电子有限公司 | A kind of internal resistance of cell detection module and detection method and the charger and mobile power source for integrating the module |
| CN210109277U (en) * | 2019-01-11 | 2020-02-21 | 深圳市爱克斯达电子有限公司 | Battery internal resistance detection module and charger and portable power source integrating same |
| CN111142037A (en) * | 2019-12-24 | 2020-05-12 | 许昌中科森尼瑞技术有限公司 | Online detection method for internal resistance of high-frequency discharge storage battery |
| CN111781522B (en) * | 2020-07-13 | 2022-11-25 | 深圳市道通科技股份有限公司 | Storage battery detection method, equipment and storage medium |
-
2020
- 2020-07-13 CN CN202010670555.2A patent/CN111781522B/en active Active
-
2021
- 2021-07-13 WO PCT/CN2021/105878 patent/WO2022012487A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105807230A (en) * | 2016-03-11 | 2016-07-27 | 郑贵林 | Storage battery residual capacity and health state rapid detection method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022012487A1 (en) | 2022-01-20 |
| CN111781522A (en) | 2020-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110914696B (en) | Method and system for estimating battery open cell voltage, state of charge, and state of health during operation of a battery | |
| US6281683B1 (en) | Rapid determination of present and potential battery capacity | |
| US8855956B2 (en) | Method and system for determining state of charge of an energy delivery device | |
| US7996167B2 (en) | Apparatus and method for estimating resistance characteristics of battery based on open circuit voltage estimated by battery voltage variation pattern | |
| US8447544B2 (en) | Method and apparatus for detecting state of charge of battery | |
| US20160238667A1 (en) | Calibration and programming of in-vehicle battery sensors | |
| CN101535827A (en) | Apparatus and method for determination of the state-of-charge of a battery when the battery is not in equilibrium | |
| EP2816366A1 (en) | Monitoring charge stored in a battery | |
| US20090109046A1 (en) | Adaptive Filter Algorithm for Estimating Battery State-of-Age | |
| CN103149535A (en) | Method and apparatus for online determination of battery state of charge and state of health | |
| CN111781522B (en) | Storage battery detection method, equipment and storage medium | |
| CN105277791A (en) | Method for on-line detection of internal resistance of a storage battery by performing low-direct-current discharge twice | |
| He et al. | iCharge: User-interactive charging of mobile devices | |
| US20230204670A1 (en) | Battery pack and state of charge estimation method thereof | |
| Frivaldsky et al. | Design of measuring and evaluation unit for multi-cell traction battery system of industrial AGV | |
| US20220341997A1 (en) | Apparatus and Method for Diagnosing a Battery | |
| JP2023543747A (en) | Battery diagnostic device and method | |
| CN107656213B (en) | Intelligent test method and system for battery core | |
| CN111781521B (en) | Method for detecting storage battery of vehicle and battery detection equipment | |
| JP2023529733A (en) | Battery diagnostic device and method | |
| US20220352558A1 (en) | Method for matching data of a first control unit with a second control unit for determining precise predictive values | |
| KR20140071060A (en) | Methods and apparatus for online determination of battery state of charge and state of health | |
| Wang et al. | Modeling, parameterization, and benchmarking of a lithium ion electric bicycle battery | |
| KR102465373B1 (en) | Battery management appratus, battery management method and battery pack | |
| JP2010008133A (en) | Portable charger, and deterioration diagnosis method of secondary battery used therefor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |