CN112255553B - Chip for detecting decay of battery molecules, battery activity protection system and method - Google Patents
Chip for detecting decay of battery molecules, battery activity protection system and method Download PDFInfo
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- G—PHYSICS
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- 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]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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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]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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Abstract
The application provides a chip for detecting decay of battery molecules, a battery activity protection system and a battery activity protection method, and the specific scheme is as follows: the first timer starts timing under the trigger of the rising edge acquired by the first trigger to generate a first count value, the second timer starts timing under the trigger of the falling edge acquired by the second trigger to generate a second count value, the comparator outputs a target zone bit when the first count value is consistent with the second count value and sends the target zone bit to the first output switch and the second output switch, so that the first output switch and the second output switch respectively output the first count value and the second count value to the processing unit when receiving the target zone bit, the processing unit calculates according to the first count value and the crystal oscillator frequency of the first timer to obtain first time, calculates according to the second count value and the crystal oscillator frequency of the second timer to obtain second time, and further calculates the difference value between the second time and the first time to obtain battery molecule decay time, and the accuracy of battery molecule decay detection can be improved.
Description
Technical Field
The application relates to the technical field of new energy automobiles, in particular to a chip for detecting decay of battery molecules, a battery activity protection system and a battery activity protection method.
Background
Currently, electric vehicles are becoming mainstream vending vehicles. For electric vehicles, battery life and cruising ability are major concerns for customers. In order to accurately measure and calculate the endurance mileage, the service life and the maintenance strategy of the electric automobile, the decay of electrons and molecules in the battery needs to be detected, which requires very high time progress and very fast signal transmission speed, so that the Field programmable gate array (Field-Programmable Gate Array, FPGA) design is needed to detect the decay of the molecules of the battery.
FPGA circuit design requires detection of molecular decay on the order of 10 picoseconds, however, current hardware chip clock oscillators cannot meet the detection accuracy. For example, the clock crystal oscillator of the existing FPGA chip Kintex7 with a comparison tip is 533MHz, the fastest detection time is only within 2ns, and the picosecond precision required by the FPGA circuit design cannot be met.
Disclosure of Invention
The application provides a chip, battery activity protection system and method for detecting battery molecule decay for improve battery molecule decay's detection precision, thereby can maintain the battery according to the battery molecule decay that detects, and calculate battery life and duration, solve the technical problem that current FPGA chip can't satisfy required detection precision among the prior art.
Embodiments of the first aspect of the present application provide a chip for detecting decay of a battery molecule, the chip comprising: the device comprises a first trigger, a second trigger, a first timer, a second timer, a comparator, a first output switch, a second output switch and a processing unit, wherein the crystal oscillator frequency of the first timer is larger than that of the second timer; wherein,
the first trigger is used for collecting rising edges of input signals;
the second trigger is used for collecting the falling edge of the input signal;
the first timer is used for starting counting under the triggering of the rising edge acquired by the first trigger to generate a first count value;
the second timer is used for starting counting under the triggering of the falling edge acquired by the second trigger to generate a second count value;
the comparator is used for comparing a first count value with a second count value, outputting a target zone bit when the first count value is consistent with the second count value, and sending the target zone bit to the first output switch and the second output switch;
the first output switch is connected with the first timer and outputs the first count value to the processing unit when receiving the target zone bit;
the second output switch is connected with the second timer and outputs the second count value to the processing unit when receiving the target zone bit;
the processing unit is used for calculating to obtain first time according to the first count value and the crystal oscillator frequency of the first timer, calculating to obtain second time according to the second count value and the crystal oscillator frequency of the second timer, and calculating the difference between the second time and the first time to obtain the decay time of the battery molecules.
According to the chip for detecting the decay of the battery molecules, the first timer starts to count under the triggering of the rising edge acquired by the first trigger to generate the first count value, the second timer starts to count under the triggering of the falling edge acquired by the second trigger to generate the second count value, the comparator outputs the target zone bit when the first count value is consistent with the second count value and sends the target zone bit to the first output switch and the second output switch, so that the first output switch and the second output switch respectively output the first count value and the second count value to the processing unit when receiving the target zone bit, the processing unit calculates to obtain the first time according to the first count value and the crystal oscillator frequency of the first timer, calculates to obtain the second time according to the crystal oscillator frequency of the second count value and the second timer, and further calculates the difference value between the second time and the first time to obtain the decay time of the battery molecules, and accordingly the detection of the battery molecule time is achieved.
Embodiments of a second aspect of the present application provide a battery activity protection system, comprising: a chip for detecting decay of a battery molecule as described in the first aspect, and a controller;
the chip for detecting decay of the battery molecules is used for sending the detected decay time of the battery molecules to the controller;
and the controller is used for comparing the decay time of the battery molecules with a preset decay time threshold, and controlling the battery to enter a self-protection state when the decay time of the battery molecules is greater than or equal to the decay time threshold.
According to the battery activity protection system, the battery molecule decay time obtained through detection is sent to the controller through the chip for detecting battery molecule decay, the battery molecule decay time is compared with the preset decay time threshold value through the controller, and when the battery molecule decay time is greater than or equal to the decay time threshold value, the battery is controlled to enter a self-protection state, so that battery activity protection is achieved, and due to the fact that the detection precision of the chip for detecting battery molecule decay is high, battery activity protection is carried out according to the battery molecule decay time obtained through detection of the chip for detecting battery molecule decay, maintenance strategies can be accurately given, and conditions are provided for accurately measuring and calculating battery life and endurance.
An embodiment of a third aspect of the present application provides a battery activity protection method, including:
acquiring a first count value output by a first timer and a second count value output by a second timer;
when the first count value is consistent with the second count value, calculating to obtain first time according to the first count value and the crystal oscillator frequency of the first timer, and calculating to obtain second time according to the second count value and the crystal oscillator frequency of the second timer;
calculating the difference between the second time and the first time to obtain the decay time of the battery molecule;
comparing the decay time of the battery molecule with a preset decay time threshold, and if the decay time of the battery molecule is greater than or equal to the decay time threshold, controlling the battery to enter a self-protection state.
According to the battery activity protection method, when the first count value output by the first timer is identical to the second count value output by the second timer, the first time is calculated according to the first count value and the crystal oscillator frequency of the first timer, the second time is calculated according to the second count value and the crystal oscillator frequency of the second timer, the difference value between the second time and the first time is calculated, the battery molecule decay time is obtained, the battery molecule decay time is compared with a preset decay time threshold, and when the battery molecule decay time is greater than or equal to the decay time threshold, the battery is controlled to enter a self-protection state, so that battery activity protection is achieved.
An embodiment of a fourth aspect of the present application proposes an electric vehicle comprising a battery activity protection system according to the embodiment of the foregoing second aspect.
Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a chip for detecting decay of a battery molecule according to an embodiment of the present application;
FIG. 2 is a diagram illustrating an exemplary data flow of an FPGA chip according to one embodiment of the present application;
fig. 3 is a schematic structural diagram of a battery active protection system according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a battery active protection system according to another embodiment of the present application;
FIG. 5 is a schematic flow chart of a battery activity protection method according to an embodiment of the present disclosure;
fig. 6 is a schematic diagram of a battery activity protection procedure according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application.
The chip for detecting decay of a battery molecule, the battery activity protection system and the method according to the embodiments of the present application are described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a chip for detecting decay of battery molecules according to an embodiment of the present application, which may be an FPGA chip, that is, the present application provides a new FPGA circuit design that can implement picosecond-level precision battery molecule decay detection.
As shown in fig. 1, the chip 10 for detecting decay of a battery molecule includes: the first trigger 110, the second trigger 120, the first timer 130, the second timer 140, the comparator 150, the first output switch 160, the second output switch 170, and the processing unit 180.
The first flip-flop 110 is configured to collect a rising edge of an input signal.
A second flip-flop 120 for collecting the falling edge of the input signal.
The input signal is a signal input to the chip by the controller when the battery needs to be detected.
The first timer 130 is configured to start counting under the trigger of the rising edge acquired by the first trigger 110, and generate a first count value.
The second timer 140 is configured to start counting under the triggering of the falling edge acquired by the second trigger 120, and generate a second count value.
And a comparator 150 for comparing the first count value and the second count value, outputting a target flag bit when the first count value and the second count value are identical, and transmitting the target flag bit to the first output switch 160 and the second output switch 170.
The value of the target flag bit may be preset, for example, the value of the target flag bit is set to be 1, and when the first count value is consistent with the second count value, the target flag bit 1 is output.
The first output switch 160 is connected to the first timer 130, and outputs a first count value to the processing unit 180 when receiving the target flag bit.
The second output switch 170 is connected to the second timer 140, and outputs a second count value to the processing unit 180 when receiving the target flag bit.
The processing unit 180 is configured to calculate a first time according to the first count value and the crystal oscillator frequency of the first timer 130, calculate a second time according to the second count value and the crystal oscillator frequency of the second timer 140, and calculate a difference between the second time and the first time to obtain a decay time of the battery molecule.
The crystal oscillator frequency of the first timer 130 is greater than that of the second timer 140, for example, the first timer 130 may select a clock crystal oscillator circuit with a crystal oscillator frequency of 533MHz, and the second timer 140 may select a clock crystal oscillator circuit with a crystal oscillator frequency of 500 MHz.
In this embodiment, when calculating the first time and the second time, the processing unit 180 calculates the first time as a product of the first count value and the base time of the first timer, and the second time as a product of the second count value and the base time of the second timer, where the base time is a reciprocal of the crystal oscillator frequency of the corresponding timer. That is, the first time and the second time can be calculated by the following formula:
after calculating the first time and the second time, the processing unit 180 further calculates a difference between the second time and the first time to obtain a battery molecule decay time, i.e. battery molecule decay time=second time-first time.
Adopt this application to provide a chip for detecting battery molecule decay, start and end to input signal through the time-recorder that utilizes two crystal oscillator frequency to be different are counted time, catch up slow clock by fast clock, calculate and obtain battery molecule decay time, can improve the detection precision of battery molecule decay. Taking 533MHz crystal oscillator frequency of the first timer and 530MHz crystal oscillator frequency of the second timer as examples, for simplicity of calculation, the calculated battery molecule decay time is (1/530 MHz-1/533 MHz) and is about equal to 10 picoseconds, and compared with the detection time 2 nanoseconds which can be achieved by Kintex7 with 533MHz Zhong Jingzhen, the detection precision is improved by 200 times.
Moreover, the chip for detecting battery molecule decay provided by the application is adopted, the first timer and the second timer with different crystal oscillator frequencies are selected, the calculated battery molecule decay time changes along with the change of the difference of the two crystal oscillator frequencies, the smaller the difference between the two crystal oscillator frequencies is, the higher the precision of the calculated battery molecule decay time is, and therefore, the scheme of the application has strong flexibility.
Further, in one possible implementation manner of the embodiment of the present application, the chip 10 for detecting decay of a battery molecule may further include a selector configured to output an end flag bit when receiving a target flag bit, where the end flag bit is used to indicate that the current counting procedure is ended.
Fig. 2 is a diagram illustrating a data flow of an FPGA chip according to an embodiment of the present application. As shown in fig. 2, the FPGA chip includes two flip-flops (register_1 and register_2 in fig. 2, respectively), two timers (counter_1 and counter_2 in fig. 2, respectively), a comparator, two output switches (switch_1 and switch_2 in fig. 2, respectively), and a selector mux, wherein the crystal frequency of counter_1 is greater than the crystal frequency of counter_2. When the signals are input, the register_1 and the register_2 respectively acquire the rising edge (corresponding to start) and the falling edge (corresponding to stop) of the signals, the rising edge acquired by the register_1 triggers a slow clock (namely counter_1 in fig. 2) to start counting, the count value is t_state_1, the falling edge acquired by the register_2 triggers a fast clock (namely counter_2 in fig. 2) to start counting, and the count value is t_state_2. The comparator compares t_state_1 and t_state_2, and when the two are equal, the flag bit overflow output by the comparator is equal to 1 and is output to the output switches switch_1 and switch_2. The output switches switch_1 and switch_2 output count values when t_state_1 and t_state_2 are equal, denoted as c_state_1 and c_state_2, respectively. Further, the time T1 (c_state_1 multiplied by the inverse of the crystal frequency of counter_1) and T2 (c_state_2 multiplied by the inverse of the crystal frequency of counter_2) consumed by counter_1 and counter_2 are calculated, respectively, and the difference (T2-T1) between T2 and T1 is calculated, thereby obtaining the battery molecular decay time. In fig. 2, when the selector mux receives the flag bit overflow of 1, a finish signal (equal to 1) is output, and this time the counting process ends.
In the chip for detecting decay of battery molecules, the first timer starts to count under the trigger of the rising edge acquired by the first trigger to generate the first count value, the second timer starts to count under the trigger of the falling edge acquired by the second trigger to generate the second count value, the comparator outputs the target zone bit when the first count value is consistent with the second count value and sends the target zone bit to the first output switch and the second output switch, so that the first output switch and the second output switch respectively output the first count value and the second count value to the processing unit when receiving the target zone bit, the processing unit calculates according to the crystal oscillator frequency of the first count value and the first timer to obtain the first time, calculates the second time according to the crystal oscillator frequency of the second count value and the second timer, and calculates the difference value between the second time and the first time to obtain the decay time of the battery molecules, and accordingly, detection of the decay time of the battery molecules is realized, and the decay detection of picosecond level precision can be realized by designing the timers with different crystal oscillator frequencies, and the decay detection precision of the battery molecules is greatly improved.
Fig. 3 is a schematic structural diagram of a battery active protection system according to an embodiment of the present application. As shown in fig. 3, the battery activity protection system 30 includes: a chip 10 for detecting decay of a battery molecule as described in the previous embodiments, and a controller 20.
Wherein a chip 10 for detecting decay of battery molecules is used for transmitting the detected decay time of the battery molecules to a controller 20.
And a controller 20 for comparing the decay time of the battery molecule with a preset decay time threshold, and controlling the battery to enter a self-protection state when the decay time of the battery molecule is greater than or equal to the decay time threshold.
The decay time threshold may be predetermined, for example, a value may be provided by a physical molecular expert as the decay time threshold based on the study experience.
In this embodiment, when the chip 10 for detecting decay of a battery molecule detects the decay time of the battery molecule, the detected decay time of the battery molecule is sent to the controller 20, and the controller 20 determines the battery activity. After the controller 20 receives the decay time of the battery molecule, the decay time of the battery molecule is compared with a preset decay time threshold, when the decay time of the battery molecule is greater than or equal to the decay time threshold, the activity of the battery is determined to be too low, and the controller 20 controls the battery to enter a self-protection state. After the battery enters a self-protection state, the battery can be protected by limiting charging voltage and current, discharging protection voltage and current, controlling a charging and discharging circuit according to voltage, current and temperature, and the like, so that the battery is enabled to recover activity.
Further, in one possible implementation manner of the embodiment of the present application, as shown in fig. 4, on the basis of the embodiment shown in fig. 3, the battery activity protection system 30 may further include: a reminder 40 to prompt the user to do periodic maintenance.
In this embodiment, the controller 20 is further configured to control the prompter 40 to send a prompt message when the decay time of the battery molecule is greater than or equal to the decay time threshold, and the prompt message prompts the user to maintain the battery. The prompter 40 may send out a prompt message in a voice broadcast manner and/or a text display manner under the control of the controller 20. For example, the prompter 40 may send a prompt message such as "current battery is low, please perform maintenance" to prompt the user to perform maintenance on the battery. Through maintenance, the battery can be helped to recover activity, and the service life and the endurance of the battery are prolonged.
Further, in one possible implementation manner of the embodiment of the present application, the controller 20 is further configured to control the chip 10 for detecting decay of the battery molecule to detect the decay time of the battery molecule again after the self-protection of the battery is completed, and compare the decay time of the battery molecule detected again with the decay time threshold until the decay time of the battery molecule is less than the decay time threshold, and control the battery activity protection procedure to end.
In the present embodiment, the process of detecting the decay time of the battery molecule using the chip 10 for detecting the decay time of the battery molecule and judging the battery activity based on the decay time of the battery molecule to control the battery to perform self-protection when the battery activity is low is a repeatedly executable process. When the self-protection of the battery is completed, the controller 20 controls the chip 10 for detecting decay of the battery molecule to detect the decay time of the battery molecule again, compares the decay time of the battery molecule detected again with a preset decay time threshold value, if the decay time of the battery molecule detected is still greater than or equal to the decay time threshold value, the battery activity is still lower, controls the battery to perform self-protection again, and detects the decay time of the battery molecule again by using the chip 10 for detecting decay of the battery molecule after the self-protection of the battery is completed, and compares the decay time of the battery molecule detected again with the preset decay time threshold value; if the detected decay time of the battery molecule is smaller than the decay time threshold value, the battery activity is recovered, and the battery activity protection flow can be ended.
According to the battery activity protection system, the detected battery molecule decay time is sent to the controller through the chip for detecting battery molecule decay, the controller compares the battery molecule decay time with the preset decay time threshold, and when the battery molecule decay time is greater than or equal to the decay time threshold, the battery is controlled to enter a self-protection state, so that battery activity protection is realized.
Fig. 5 is a flow chart illustrating a method for protecting battery activity according to an embodiment of the present application. As shown in fig. 5, the battery activity protection method may include the steps of:
step 101, a first count value output by a first timer and a second count value output by a second timer are obtained.
The crystal oscillation frequency of the first timer is larger than that of the second timer.
In this embodiment, the first timer may start counting under the trigger of the rising edge of the collected signal to generate the first count value, and the second timer may start counting under the trigger of the falling edge of the collected signal to generate the second count value.
And 102, calculating to obtain a first time according to the first count value and the crystal oscillator frequency of the first timer when the first count value is consistent with the second count value, and calculating to obtain a second time according to the second count value and the crystal oscillator frequency of the second timer.
In this embodiment, after the first count value and the second count value are obtained, the first count value and the second count value may be compared, and when the first count value is equal to the second count value, the first time is calculated according to the crystal oscillator frequencies of the first count value and the first timer, and the second time is calculated according to the crystal oscillator frequencies of the second count value and the second timer.
The first time and the second time are calculated as follows:
step 103, calculating the difference between the second time and the first time to obtain the decay time of the battery molecule.
And 104, comparing the decay time of the battery molecules with a preset decay time threshold, and controlling the battery to enter a self-protection state if the decay time of the battery molecules is greater than or equal to the decay time threshold.
In this embodiment, after the first time and the second time are calculated, the difference between the second time and the first time may be further calculated, that is, the second time minus the first time, to obtain the decay time of the battery molecule.
And then comparing the calculated decay time of the battery molecule with a preset decay time threshold, and controlling the battery to enter a self-protection state when the decay time of the battery molecule is larger than or equal to the decay time threshold and the battery activity is too low. In the self-protection state, the battery can be self-protected by limiting charging voltage and current, discharging protection voltage and current, controlling a charging and discharging circuit according to voltage, current and temperature and the like, so as to help the battery to restore activity.
Further, in one possible implementation manner of the embodiment of the present application, after the decay time of the battery molecule is greater than or equal to the decay time threshold, in addition to controlling the battery to enter the self-protection state, a prompt message may be sent to the user through a voice broadcasting manner and/or a text display manner, so as to prompt the user to maintain the battery. The battery may also be assisted in restoring activity by maintenance of the battery.
In one possible implementation manner of the embodiment of the present application, after the self-protection of the battery is completed, a new first count value and a new second count value may be acquired, so as to calculate the decay time of the battery molecule again according to the new first count value and the new second count value, and compare the calculated decay time of the battery molecule with the decay time threshold until the decay time of the battery molecule is less than the decay time threshold.
That is, in this embodiment, steps 101 to 104 are repeatedly performed, and after the self-protection of the battery is completed, steps 101 to 104 are performed again to determine whether the decay time of the detected battery molecule is greater than or equal to the decay time threshold, if so, the battery is controlled to enter the self-protection state again, and if not, the battery activity protection flow is ended. After the battery is controlled to enter a self-protection state, when the self-protection of the battery is finished, steps 101-104 are executed again, the above-mentioned processes are repeatedly executed until the last detected decay time of the battery molecule is smaller than the decay time threshold value, the battery activity is indicated to be recovered, and then the battery activity protection process is ended.
Fig. 6 is a schematic diagram of a battery activity protection procedure according to an embodiment of the present application. As shown in fig. 6, the decay detection of the battery molecule is firstly carried out, after the detection is completed, whether the activity of the battery is too low is judged according to the detection result, if yes, the battery is automatically protected, and the user is prompted to carry out maintenance; if not, the process is directly ended. After the battery is automatically protected and the maintenance is prompted to be completed, detecting whether the activity of the battery is recovered again, if so, ending the protection of the activity of the battery and prompting the end; if not, the battery is automatically protected again and the user is prompted to complete maintenance.
Although not shown in fig. 6, it is understood that in detecting whether or not the battery has recovered activity, it is necessary to detect decay of the battery molecule and determine whether or not the battery has recovered activity based on the detection result.
According to the battery activity protection method, when the first count value and the second count value output by the first timer are identical, the first time is calculated according to the first count value and the crystal oscillator frequency of the first timer, the second time is calculated according to the second count value and the crystal oscillator frequency of the second timer, the difference between the second time and the first time is calculated, the battery molecule decay time is obtained, the battery molecule decay time is compared with a preset decay time threshold, and when the battery molecule decay time is greater than or equal to the decay time threshold, the battery is controlled to enter a self-protection state, so that battery activity protection is achieved.
The embodiment of the application also provides an electric automobile, which comprises the battery activity protection system.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (9)
1. A chip for detecting decay of a battery molecule, the chip comprising: the device comprises a first trigger, a second trigger, a first timer, a second timer, a comparator, a first output switch, a second output switch and a processing unit, wherein the crystal oscillator frequency of the first timer is larger than that of the second timer; wherein,
the first trigger is used for collecting rising edges of input signals;
the second trigger is used for collecting the falling edge of the input signal;
the first timer is used for starting counting under the triggering of the rising edge acquired by the first trigger to generate a first count value;
the second timer is used for starting counting under the triggering of the falling edge acquired by the second trigger to generate a second count value;
the comparator is used for comparing a first count value with a second count value, outputting a target zone bit when the first count value is consistent with the second count value, and sending the target zone bit to the first output switch and the second output switch;
the first output switch is connected with the first timer and outputs the first count value to the processing unit when receiving the target zone bit;
the second output switch is connected with the second timer and outputs the second count value to the processing unit when receiving the target zone bit;
the processing unit is used for calculating to obtain first time according to the first count value and the crystal oscillator frequency of the first timer, calculating to obtain second time according to the second count value and the crystal oscillator frequency of the second timer, and calculating the difference between the second time and the first time to obtain the decay time of the battery molecules.
2. The chip for detecting decay of a battery molecule of claim 1, wherein said chip further comprises:
and the selector is used for outputting an end zone bit when receiving the target zone bit, wherein the end zone bit is used for indicating the end of the counting flow.
3. A battery activity protection system, comprising: a chip for detecting decay of a battery molecule according to any one of claims 1-2, and a controller;
the chip for detecting decay of the battery molecules is used for sending the detected decay time of the battery molecules to the controller;
and the controller is used for comparing the decay time of the battery molecules with a preset decay time threshold, and controlling the battery to enter a self-protection state when the decay time of the battery molecules is greater than or equal to the decay time threshold.
4. The battery activity protection system of claim 3, further comprising: a reminder;
the controller is further used for controlling the prompter to send prompt information when the decay time of the battery molecules is greater than or equal to the decay time threshold, and the prompt information prompts a user to maintain the battery;
the prompter is used for sending out the prompt information in a voice broadcasting mode and/or a text display mode.
5. The battery activity protection system of claim 3 or 4, wherein the controller is further configured to:
and after the self-protection of the battery is finished, controlling the chip for detecting the decay of the battery molecules to detect the decay time of the battery molecules again, comparing the decay time of the battery molecules detected again with the decay time threshold value, and controlling the battery activity protection flow to be finished when the decay time of the battery molecules is smaller than the decay time threshold value.
6. A battery activity protection method, comprising:
the first trigger collects rising edges of input signals;
a second trigger collects the falling edge of the input signal;
a first timer starts counting under the triggering of the rising edge acquired by the first trigger to generate a first count value;
a second timer starts counting under the triggering of the falling edge acquired by the second trigger to generate a second count value;
when the first count value is consistent with the second count value, calculating to obtain first time according to the first count value and the crystal oscillator frequency of the first timer, and calculating to obtain second time according to the second count value and the crystal oscillator frequency of the second timer;
calculating the difference between the second time and the first time to obtain the decay time of the battery molecule;
comparing the decay time of the battery molecule with a preset decay time threshold, and if the decay time of the battery molecule is greater than or equal to the decay time threshold, controlling the battery to enter a self-protection state.
7. The battery activity protection method of claim 6, further comprising, after said if said battery molecule decay time is greater than or equal to said decay time threshold:
and sending prompt information to a user through a voice broadcasting mode and/or a text display mode so as to prompt the user to maintain the battery.
8. The battery activity protection method according to claim 6 or 7, characterized by further comprising, after the control battery enters a self-protecting state:
and after the self-protection of the battery is finished, acquiring a new first count value and a new second count value, calculating the decay time of the battery molecule again according to the first count value and the second count value which are acquired newly, and comparing the calculated decay time of the battery molecule with the decay time threshold until the decay time of the battery molecule is smaller than the decay time threshold.
9. An electric vehicle comprising a battery activity protection system according to any one of claims 3-5.
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