CN108963350B - Battery protection method and device - Google Patents
Battery protection method and device Download PDFInfo
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- CN108963350B CN108963350B CN201710353694.0A CN201710353694A CN108963350B CN 108963350 B CN108963350 B CN 108963350B CN 201710353694 A CN201710353694 A CN 201710353694A CN 108963350 B CN108963350 B CN 108963350B
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- 238000005516 engineering process Methods 0.000 abstract description 4
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention is suitable for the technical field of batteries, and provides a battery protection method and a device thereof, wherein the method comprises the following steps: activating and acquiring a first current value of the circuit at a first time interval; if the first current value meets a preset current protection triggering rule, executing current protection operation; activating and acquiring a voltage value of the circuit and a temperature value of the protected battery at a second time interval; if the voltage value and the temperature value meet a preset electrical protection triggering rule, executing electrical protection operation; the first time interval and the second time interval are set according to the corresponding relation between the preset priority and the acquisition time. The embodiment of the invention awakens the protection device of the battery intermittently at different time intervals, and the protection device of the battery executes the acquisition and detection operation of current, voltage or temperature only after awakening, thereby solving the problems that the existing battery protection technology needs to continuously acquire electrical parameters for a long time, has high power consumption, and reduces the battery endurance time and the electric quantity utilization efficiency.
Description
Technical Field
The invention belongs to the technical field of batteries, and particularly relates to a battery protection method and a battery protection device.
Background
With the continuous development and wide-spread of mobile terminals, batteries are also more and more important as power supply components of mobile terminals. Therefore, how to adopt corresponding measures to protect the battery when the mobile terminal has a fault also directly affects the stability of the mobile terminal.
The existing battery protection technology generally monitors the electrical parameters of the circuit where the battery is located in real time, such as the current value, the voltage value, the instantaneous power and other electrical parameters of the circuit in real time. However, this method requires a long time to continuously obtain the electrical parameters of the circuit and perform protection detection, which results in large power consumption and reduces the battery life and the utilization efficiency of the electric quantity.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method and an apparatus for protecting a battery, so as to solve the problems that the existing battery protection technology needs to continuously obtain electrical parameters of a circuit for a long time and perform protection detection, has large power consumption, and reduces the endurance time of the battery and the utilization efficiency of electric quantity.
A first aspect of an embodiment of the present invention provides a method for protecting a battery, where the method includes:
activating and acquiring a first current value of the circuit at a first time interval; the circuit is a working circuit where a protected battery is located;
if the first current value meets a preset current protection triggering rule, executing current protection operation;
activating and acquiring a voltage value of the circuit and a temperature value of the protected battery at a second time interval;
if the voltage value and the temperature value meet a preset electrical protection triggering rule, executing electrical protection operation;
and the first time interval and the second time interval are set according to the corresponding relation between the preset priority and the acquisition time.
A second aspect of an embodiment of the present invention provides a protection device for a battery, including:
the current acquisition unit is used for activating at a first time interval and acquiring a first current value of the circuit; the circuit is a working circuit where a protected battery is located;
the current protection judging unit is used for executing current protection operation if the first current value meets a preset current protection triggering rule;
the electrical parameter acquisition unit is used for activating at a second time interval and acquiring a voltage value of the circuit and a temperature value of the protected battery;
the electric protection judging unit is used for executing electric protection operation if the voltage value and the temperature value meet a preset electric protection triggering rule;
and the first time interval and the second time interval are set according to the corresponding relation between the preset priority and the acquisition time.
A third aspect of the embodiments of the present invention provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the following steps when executing the computer program:
activating and acquiring a first current value of the circuit at a first time interval; the circuit is a working circuit where a protected battery is located;
if the first current value meets a preset current protection triggering rule, executing current protection operation;
activating and acquiring a voltage value of the circuit and a temperature value of the protected battery at a second time interval;
if the voltage value and the temperature value meet a preset electrical protection triggering rule, executing electrical protection operation;
and the first time interval and the second time interval are set according to the corresponding relation between the preset priority and the acquisition time.
A fourth aspect of embodiments of the present invention provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the steps of:
activating and acquiring a first current value of the circuit at a first time interval; the circuit is a working circuit where a protected battery is located;
if the first current value meets a preset current protection triggering rule, executing current protection operation;
activating and acquiring a voltage value of the circuit and a temperature value of the protected battery at a second time interval;
if the voltage value and the temperature value meet a preset electrical protection triggering rule, executing electrical protection operation;
and the first time interval and the second time interval are set according to the corresponding relation between the preset priority and the acquisition time.
The embodiment of the invention provides a battery protection method and a device thereof, which have the following beneficial effects:
according to the embodiment of the invention, the protection device of the battery is awakened discontinuously at the first time interval and the second time interval, the protection device of the battery executes the acquisition and detection operation of current, voltage or temperature only after being awakened, and the acquired acquisition data is judged according to the preset protection judgment rule, so that the power consumption of the battery protection device is reduced, the endurance time of the battery is prolonged, and the utilization efficiency of electric quantity is improved. On the other hand, the user can determine the acquisition frequency of different electrical parameters according to different priorities, so that the applicability of the battery protection device is improved, and targeted battery protection measures can be executed according to different circuit environments.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a flowchart illustrating an implementation of a method for protecting a battery according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a specific implementation of a battery protection method S102 according to another embodiment of the present invention;
fig. 3 is a flowchart illustrating a specific implementation of the battery protection methods S205 and S206 according to another embodiment of the present invention;
fig. 4 is a flowchart illustrating a specific implementation of a battery protection method S102 according to another embodiment of the present invention;
fig. 5 is a flowchart illustrating a specific implementation of a battery protection method S202 according to another embodiment of the present invention;
fig. 6 is a block diagram illustrating a protection apparatus for a battery according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a terminal device according to another 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.
According to the embodiment of the invention, the protection device of the battery is awakened discontinuously at the first time interval and the second time interval, the protection device of the battery executes the acquisition and detection operation of current, voltage or temperature only after awakening, and the acquired acquisition data is judged according to the preset protection judgment rule, so that the problems that in the existing battery protection technology, the electric parameters of a circuit need to be acquired continuously for a long time and protection detection is carried out, the power consumption is high, and the endurance time of the battery and the utilization efficiency of electric quantity are reduced are solved.
In the embodiment of the invention, the execution main body of the process is a protection device of a battery. The battery protection device is applied to an operating circuit where a battery to be protected is located. The battery protection device can be used as an independent circuit component and is connected to a working circuit where a protected battery is located to execute corresponding battery protection operation; can also be used as a protection module in the battery. In particular, the protected battery is a lithium battery. Fig. 1 shows a flowchart of an implementation of a method for protecting a battery according to an embodiment of the present invention, which is detailed as follows:
in S101, activating and acquiring a first current value of a circuit at a first time interval; the circuit is a working circuit where a protected battery is located.
In this embodiment, the protection device of the battery is intermittently activated at first time intervals, and acquires a first current value of the current when activated. It should be noted that the battery protection device is in a sleep state during each active interval, and the sleep state specifically includes: except for receiving the activation instruction, the device keeps a stop working state and does not execute the operations of parameter acquisition, parameter processing and the like.
For example, the first time interval is 2ms, that is, the protection device of the battery acquires the current value of the circuit once every 2ms, if the protection device of the battery determines that the current value of the circuit at that time is in the normal range, the protection device of the battery will return to the sleep state, and after the interval of 2ms, the protection device of the battery will be activated again to acquire the current value of the circuit again.
In this embodiment, when the battery to be protected has been connected to the circuit and is in the process of discharging or charging, the working circuit is the connected circuit; when the battery to be protected is in a standby state, namely, the battery is not connected into any circuit, the working circuit is a loop circuit inside the battery.
In this embodiment, since the protection device of the battery is in the sleep state during the discontinuous collection time, the amount of current consumed by the protection device of the battery is small, so as to reduce the amount of battery power consumed by the battery protection operation, thereby increasing the endurance time of the battery and improving the service efficiency of the battery.
In this embodiment, the first time interval may be set by the user, or may be set by a battery protection device.
In this embodiment, the protection device of the battery may obtain an instantaneous current value as the first current value, or may continuously collect current values for a plurality of times, and determine an algorithm according to a preset first current value to obtain the first current value. For example, the preset first current value determining algorithm sets a weight of each current value according to the occurrence frequency of the current values, and calculates the first current value according to each current value and the corresponding weight thereof.
Optionally, in this embodiment, when the protected battery is in the standby state, the protection method of the battery is suspended from being executed until the protected battery is connected to the circuit. When the battery is not charged or discharged, the battery is generally in a relatively stable state, the positive and negative poles of the battery are in an off state, and no loop is generated, so that even if current exists in the battery, the current is only weak current generated by the movement of part of metal charges, and the battery cannot be greatly damaged or influenced.
In S102, if the first current value satisfies a preset current protection triggering rule, a current protection operation is performed.
In this embodiment, after the protection device of the battery obtains the first current value, whether the working circuit where the battery is located is abnormal is determined according to a preset current protection triggering rule and the first current value, and then whether the corresponding current protection operation needs to be executed is determined.
In this embodiment, if the first current value does not satisfy the preset current protection triggering rule, it indicates that the battery is in a normal operating state, and the protection device of the battery enters a sleep state until the next acquisition time comes. And if the first current value meets a preset current protection triggering rule, determining that a working circuit where the battery is located is in an abnormal state, and executing corresponding current protection operation according to the first current value.
In this embodiment, the current protection operation includes, but is not limited to, one or any combination of at least two of the following: overcurrent protection operation, short circuit protection operation, open circuit protection operation, and the like. The protection device of the battery determines the corresponding circuit state according to the first current value and a preset current protection triggering rule, and then determines the corresponding protection operation. For example, if the circuit state is that the current is too large, the overcurrent protection operation is executed; if the circuit state is a circuit short circuit, executing short circuit protection operation; if the circuit state is open circuit, the open circuit protection operation is executed.
Optionally, in this embodiment, the over-current protection operation is specifically to control the output power of the battery so as to reduce the current of the circuit; if a resistor or a capacitor is inserted, the current of the circuit is buffered.
Optionally, in this embodiment, the short-circuit protection operation is specifically to open a connection switch of the battery intervening circuit so as to avoid damage to the battery by the short-circuit current.
Optionally, in this embodiment, the open-circuit protection operation is implemented by outputting a reverse current to the battery protection device, so that the current of the circuit is gradually decreased, and the damage to the components in the circuit and the battery caused by the transient current of 0 is avoided.
In S103, activating and acquiring a voltage value of the circuit and a temperature value of the protected battery at a second time interval; and the first time interval and the second time interval are set according to the corresponding relation between the preset priority and the acquisition time.
In this embodiment, a memory of the battery protection device records a plurality of time intervals, each time interval corresponds to collecting one or more electrical parameters, in this embodiment, a first time interval corresponds to collecting a current value, and a second time interval corresponds to collecting a voltage value of the circuit and a temperature value of the battery to be protected.
In this embodiment, when a short circuit occurs in a certain part of the circuit in which the battery operates, the voltage will be distributed to each electrical appliance and the voltages at two ends of the battery will become large, so that the battery is over-voltage. In view of this, the battery protection device obtains the voltage value of the battery at the second time interval in order to avoid the battery from operating in an overvoltage circuit environment.
In this embodiment, if the battery operates for a long time or the circuit current is too large, so that the heat generation amount of the battery is large and deviates from the normal range, the battery is easy to be worn and even melted due to over-temperature. In view of this, the protection device for the battery is to obtain the temperature value of the battery at the second time interval in order to avoid the battery from being in an over-temperature state for a long time. Alternatively, the protection device of the battery may acquire the temperature value of the battery at a third time interval, that is, the voltage value and the temperature value are not acquired at the same time.
In this embodiment, the correspondence between the priority and the acquisition time is recorded in the memory of the battery protection device, and the priority of each electrical parameter and the acquisition time frequency corresponding to the priority are recorded in the correspondence. For example, the situation of overcurrent and even short circuit often occurs in a working circuit where the protected battery is located, so that in this situation, the priority of the current is higher, and the corresponding acquisition time frequency is also higher, that is, the first time interval is 2 ms; and the occurrence of overvoltage and overtemperature in this environment is less likely, so the priority of voltage and temperature is lower, and the corresponding acquisition time frequency is also lower, i.e. the second time interval is 512 ms. Therefore, for the electrical parameters with higher priority, the corresponding time acquisition frequency is higher, namely the time interval is smaller, so that the corresponding time interval can be set according to the priority of different electrical parameters.
In this embodiment, the user may change the priority of each electrical parameter, and the battery protection device will determine the time interval corresponding to each electrical parameter according to the priority sequence set by the user. The user can also set the corresponding relation between the priority and the acquisition time, so as to directly change the time interval corresponding to each priority.
Optionally, in this embodiment, when the acquisition timings of two or more electrical parameters overlap, multiple electrical parameters may be acquired simultaneously or only electrical parameters with a longer time interval may be acquired. For example, the time interval corresponding to the collected current value is 2ms, the time interval corresponding to the collected voltage value is 512ms, if the time counters of the two electrical parameters are started simultaneously after the protection device of the battery is started, when the current value is collected for 255 times, the 256-th collection time coincides with the collection time of the voltage value, and at this time, the protection device of the battery can obtain the voltage value and the current, and respectively judge whether the corresponding operation needs to be executed according to the corresponding protection rules; it is also possible to acquire only the voltage value, and to temporarily acquire the current value again at the next acquisition time, i.e., 257 th acquisition time. For the parameters with shorter acquisition time intervals, the influence on the parameters is less when one acquisition is missed because the acquisition frequency is higher; for the parameter with a longer acquisition time interval, if the acquisition of the parameter is missed, the next parameter acquisition needs to be executed after waiting for a longer time, and the real condition of the circuit cannot be reflected in time.
In S104, if the voltage value and the temperature value satisfy a preset electrical protection trigger rule, an electrical protection operation is performed.
In this embodiment, after the protection device of the battery obtains the voltage value and the temperature value, the protection device of the battery determines whether the circuit state at that time is abnormal according to a preset electrical protection triggering rule, and then determines whether to execute an electrical protection operation. Specifically, if the voltage value and the temperature value do not meet the preset electrical protection triggering rule, it indicates that the circuit state is normal, and the electrical protection device enters a sleep state; if the voltage value and the temperature value meet the preset electrical protection triggering rule, the circuit is in an abnormal state, and corresponding electrical protection operation is executed. Wherein the electrical protection operation includes but is not limited to one or any combination of at least two of the following: over-temperature protection operation, overvoltage protection operation, overcharge protection operation, overdischarge protection operation and the like.
In this embodiment, if the obtained voltage value of the circuit meets a preset electrical protection triggering rule, it is determined that the battery is in an overvoltage state, and an overvoltage protection operation is performed. For example, the overvoltage protection operates by connecting a resistor with a large resistance to the circuit to divide the voltage of the battery, thereby reducing the voltage value at both ends of the battery.
In this embodiment, if the obtained temperature value of the battery meets a preset electrical protection triggering rule, it is determined that the battery is in an over-temperature state, and an over-temperature protection operation is executed. For example, the over-temperature protection operates to control the output voltage/current of the battery, thereby reducing the output power of the battery and reducing the generation of heat, wherein whether to stop the operation of the battery is determined according to the degree of the over-temperature.
In this embodiment, if the voltage value and the temperature value both satisfy the preset electrical protection triggering rule, it is determined that the battery is in an over-temperature state and an over-voltage state, and the over-temperature protection operation and the over-voltage protection operation are performed at the same time. That is, if it is determined that the battery can be determined to be in various abnormal states according to the voltage value and the temperature value, the protection operations corresponding to the respective abnormal states are simultaneously executed.
As can be seen from the above, the protection method for a battery provided in the embodiment of the present invention intermittently wakes up the protection device for a battery at the first time interval and the second time interval, and the protection device for a battery performs the acquisition and detection operations of current, voltage, or temperature only after waking up, and determines the acquired data according to the preset protection determination rule, thereby reducing the power consumption of the protection device for a battery, prolonging the endurance time of the battery, and improving the utilization efficiency of electric quantity. On the other hand, the user can determine the acquisition frequency of different electrical parameters according to different priorities, so that the applicability of the battery protection device is improved, and targeted battery protection measures can be executed according to different circuit environments.
Referring to fig. 2, fig. 2 is a flowchart illustrating an implementation of a battery protection method S102 according to an embodiment of the present invention. The difference between the present embodiment and the previous embodiment is that the step S102 in the method for protecting a battery provided in the present embodiment includes the following steps, which are detailed as follows:
further, as another embodiment of the present invention, if the first current value satisfies a preset current protection triggering rule, the performing the current protection operation specifically includes:
in S201, it is determined whether the first current value is greater than a preset first-level overcurrent value.
In this embodiment, after obtaining the first current value of the circuit in which the battery is located, the protection device of the battery is compared with the first level overcurrent value, so as to determine whether the circuit is in an overcurrent state, and then determine whether a protection operation needs to be performed.
In this embodiment, if the first current value is greater than the preset first-level overcurrent value, it indicates that the current of the circuit has exceeded the current range of normal operation, i.e. the circuit is in an abnormal state, and it is necessary to further determine the abnormal level, so the related operation of S202 will be performed.
In this embodiment, if the first current value is smaller than the preset first-stage overcurrent value, it indicates that the current of the circuit is in a normal state, and the protection device of the battery will resume to sleep and wait for the next acquisition time to come.
In S202, if the first current value is greater than the first-stage overcurrent value, it is determined whether the first current value is greater than a preset short-circuit current value.
In this embodiment, since the current of the circuit in which the battery is located is already greater than the primary current value, that is, exceeds the normal operating current range, it is determined whether the circuit is short-circuited, and the first current value is compared with a preset short-circuit current value.
In this embodiment, since the damage to the battery due to the short circuit of the circuit is large, when the circuit is determined to be abnormal, it is first determined whether the abnormality is a short circuit, and if so, corresponding measures can be taken to protect the battery immediately.
In this embodiment, if the first current value is greater than the preset short-circuit current value, the relevant operation of S203 is executed; otherwise, if the first current value is smaller than the preset short-circuit current value, the related operation of S204 is executed.
In S203, if the first current value is greater than the short-circuit current value, a short-circuit protection counter is started to count.
In this embodiment, the battery protection device is provided with a short-circuit protection counter for counting the number of times that the circuit current is greater than the short-circuit current value. When the protection device of the battery determines that the first current value is larger than the short-circuit current value, the short-circuit protection counter is started to count, and specifically, the count value of the short-circuit protection counter is increased by 1 every time the first current value of the circuit is larger than the short-circuit current value.
In S204, if the count value of the short-circuit protection counter satisfies the short-circuit protection trigger rule, a short-circuit protection operation is performed.
In this embodiment, the protection device of the battery will determine whether to perform the short-circuit protection operation according to the value of the short-circuit protection counter, that is, when the value of the short-circuit protection counter satisfies a preset condition, the protection device of the battery will perform the short-circuit protection operation.
Optionally, in this embodiment, after the protection device of the battery has performed the short-circuit protection operation, the value of the short-circuit protection counter is set to zero, so that the counter performs counting again.
It should be noted that the preset short-circuit current value is greater than the first-stage overcurrent current value.
In S205, if the first current value is smaller than the short-circuit current value, whether to execute an overcurrent protection operation is determined according to the first current value and a preset overcurrent protection trigger rule.
In the present embodiment, if the first current value is smaller than the short-circuit current value, it indicates that the circuit is in a current abnormal state, but not in a short-circuit state, and the short-circuit protection operation is not required. Because the short-circuit protection operation generally belongs to the emergency protection operation, the normal operation of the circuit can be influenced, so that the short-circuit protection operation is not needed to be adopted under the general overcurrent condition, the working circuit can not normally operate, and the working efficiency is reduced.
In this embodiment, if the first current value is smaller than the short-circuit current value, whether to perform the over-current protection operation is determined according to a preset over-current protection triggering rule. Because the current value of the circuit is larger than the first-stage overcurrent value, the circuit is in an abnormal state, so that judgment is still needed to execute corresponding overcurrent protection operation. Specifically, if the first current value satisfies the overcurrent protection triggering rule, the relevant operation of S206 is executed; and if the first current value does not meet the overcurrent protection triggering rule, entering a dormant state.
In S206, if the first current value satisfies the over-current protection triggering rule, an over-current protection operation is performed.
In the embodiment of the invention, when the protection device of the battery detects that the current is in an abnormal state, whether the short circuit occurs is determined according to the current of the circuit, and the short circuit is a primary judgment object because the short circuit has great harm to the electrical appliance and the battery, thereby reducing the damage to the battery when the short circuit occurs. On the other hand, the secondary judgment is carried out by setting the primary overcurrent value and the short-circuit current value, so that the judgment accuracy of the protection device of the battery is improved.
Referring to fig. 3, fig. 3 is a flowchart illustrating an implementation of the battery protection methods S205 and S206 according to another embodiment of the present invention. The difference between the present embodiment and the embodiment corresponding to fig. 2 is that S205 and S206 in the method for protecting a battery provided in the present embodiment include the following steps, which are detailed as follows:
further, as another embodiment of the present invention, S205 specifically includes:
in S301, it is determined whether the first current value is greater than a preset secondary overcurrent value.
In this embodiment, the battery protection device divides the over-current state into two stages, the first stage is that the circuit has a slight over-current condition, i.e. the circuit current is greater than the first stage over-current value but less than the second stage over-current value, at this time, the relevant operation of S3031 can be executed; and if the second stage is a circuit with a serious overcurrent condition, the current of the circuit is greater than the current value of the second stage, and at the moment, the relevant operation of S3021 is executed.
In this embodiment, the primary overcurrent value, the secondary overcurrent value, and the short-circuit current value may be set by a user, or may be set by a battery protection device according to an electrical parameter of a working circuit in which the battery is located. For example, the protection device of the battery obtains a current value of the battery during normal operation, and determines the three parameter values according to the current value and a preset first-stage overcurrent coefficient, a preset second-stage overcurrent coefficient and a preset short-circuit coefficient.
It should be noted that the secondary overcurrent value is greater than the primary overcurrent value and less than the short-circuit current value.
In S3021, if the first current value is greater than the second overcurrent value, a second overcurrent counter is started to count, and it is determined whether a count value of the second overcurrent counter satisfies a second overcurrent protection trigger rule.
In this embodiment, since the specific operations of S3021 and S203 are similar, the short-circuit protection counter in S203 may be replaced by the secondary overcurrent protection counter in S3021, and thus the detailed description may refer to the related explanation of S203 and will not be described herein again.
In S3031, if the first current value is smaller than the second overcurrent value, increasing a value of a first overcurrent counter, and determining whether to execute a first overcurrent protection operation according to the value of the first overcurrent counter.
In this embodiment, since the specific operations of S3031 and S203 are similar, the short-circuit protection counter in S203 may be replaced by the first-stage over-current protection counter in S3031, and thus the detailed description may refer to the related explanation of S203 and will not be described herein again.
Further, S206 may include S3022 or S3032. It should be noted that, if the count value of the secondary overcurrent counter meets the secondary overcurrent protection triggering rule, the relevant operation of S3022 is executed; and if the count value of the primary overcurrent counter meets the primary overcurrent protection triggering rule, executing the relevant operation of S3032.
In S3022, if the count value of the secondary overcurrent counter satisfies the secondary overcurrent protection trigger rule, a secondary overcurrent protection operation is performed.
In S3032, if the count value of the primary overcurrent counter satisfies the primary overcurrent protection trigger rule, a primary overcurrent protection operation is performed.
In the embodiment of the invention, the overcurrent state is divided into two different grades by the protection device of the battery, the primary overcurrent state is a slight overcurrent state, and if the circuit is in the condition, the primary overcurrent protection operation is correspondingly executed; and the secondary overcurrent state is a serious overcurrent state, and if the circuit is in the secondary overcurrent protection operation, the secondary overcurrent protection operation is correspondingly executed, so that the corresponding overcurrent protection operation is executed according to the actual overcurrent condition of the circuit, the accuracy of the protection operation of the battery protection device is improved, and the normal operation of the circuit is prevented from being influenced.
Referring to fig. 4, fig. 4 is a flowchart illustrating an implementation of a battery protection method S102 according to another embodiment of the present invention. With respect to the embodiment shown in fig. 1, in the method for protecting a battery provided in this embodiment, S102 includes S401 to S409.
S401 to S403 are the same as S201 to S203, and please refer to the related descriptions of S201 to S203, which are not described herein.
At S404, if the value of the short-circuit protection counter is greater than a first threshold, the short-circuit protection operation is performed.
In this embodiment, the protection device of the battery compares the value of the short-circuit protection counter with a first threshold, and if the value of the short-circuit protection counter is greater than the first threshold, performs the short-circuit protection operation; and if the value of the short-circuit protection counter is smaller than the first threshold value, the protection device of the battery enters a dormant state and waits for the coming of the next acquisition moment.
S405 is the same as S301, and S406 is the same as S3021, for which reference is specifically made to the description of S301 to S3021, which is not repeated herein.
In S407, if the value of the secondary overcurrent counter is greater than a second threshold, the secondary overcurrent protection operation is performed.
In this embodiment, the protection device of the battery compares the value of the secondary overcurrent counter with a second threshold, and if the value of the secondary overcurrent counter is greater than the second threshold, performs a secondary overcurrent protection operation; and if the value of the secondary overcurrent counter is smaller than the second threshold value, the protection device of the battery enters a dormant state and waits for the coming of the next acquisition moment.
S408 is the same as S3031, and please refer to the related description of S3031, which is not described herein again.
In S409, if the value of the primary overcurrent counter is greater than a third threshold, the primary overcurrent protection operation is executed. Wherein the second threshold is greater than the first threshold and less than the third threshold.
In this embodiment, the protection device of the battery compares the value of the primary overcurrent counter with a third threshold, and if the value of the primary overcurrent counter is greater than the third threshold, performs a primary overcurrent protection operation; and if the value of the primary overcurrent counter is smaller than the third threshold value, the protection device of the battery enters a dormant state and waits for the coming of the next acquisition moment.
In the embodiment, since the short circuit condition has a large damage to the circuit, the corresponding first threshold value will be small, and the short circuit protection operation is performed in a short time; the second-level overcurrent state belongs to a second serious circuit abnormal state, so that the second threshold value of the second-level overcurrent state is larger than the first threshold value but smaller than the third threshold value; while the first stage overcurrent condition is a slight abnormal condition that may occur frequently during operation of the circuit, the third threshold will be at a maximum. Preferably, the first threshold is 2, the second threshold is 100, and the third threshold is 750.
In the embodiment of the invention, the condition of executing the protection operation is determined by comparing the numerical value of each counter with the corresponding threshold value, so that the situation that the protection operation is executed immediately when the circuit current shakes is avoided, the stability of the circuit is improved, the abnormal situation of the circuit is also dealt with, and the occurrence of misjudgment is reduced.
Referring to fig. 5, fig. 5 is a flowchart illustrating an implementation of a battery protection method S202 according to another embodiment of the present invention. In another embodiment, S202 includes S501-S502, which are detailed as follows:
in S501, if the first current value is greater than the first-stage overcurrent value, a second current value of the circuit at the current moment is collected.
In this embodiment, when the protection device of the battery determines that the first current value is greater than the first-stage overcurrent value, it indicates that an abnormal state may exist in the circuit, and it is necessary to determine whether the current abnormality is caused by the circuit abnormality or the circuit current jitter. After the first current value is determined to be larger than the first-stage overcurrent value, the current of the circuit is acquired again to serve as a second current value.
In S502, the second current value is set as the first current value, and it is determined whether the set first current value is greater than the first-stage overcurrent value.
In this embodiment, the protection device of the battery sets the second current value as the first current value after acquiring the second current value, and repeatedly performs the operation of determining whether the first current value is greater than the first level of overcurrent value, thereby determining that the overcurrent condition is not current jitter but is due to an abnormal condition of the circuit.
It should be noted that, since the protection device of the battery has set the second current value as the first current value, in the subsequent identification and determination steps, the first current values are the set first current values.
In the embodiment of the invention, the protection device of the battery performs secondary acquisition when the overcurrent condition of the circuit is judged, so that the accuracy of judging the circuit state is extracted.
It should be noted that, the specific implementation process of the preset electrical protection rule, the voltage value, and the temperature value, and determining whether to execute the electrical protection operation may refer to the implementation processes of fig. 2, fig. 3, fig. 4, and fig. 5, where the compared parameter is replaced by the voltage value or the temperature value from the current value, and the compared parameter is also modified correspondingly.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Fig. 6 is a block diagram illustrating a structure of a protection device for a battery according to an embodiment of the present invention, where the protection device for a battery includes units for performing the steps in the corresponding embodiment of fig. 1. Please refer to fig. 1 and fig. 1 for the corresponding description of the embodiment. For convenience of explanation, only the portions related to the present embodiment are shown.
Referring to fig. 6, the protection apparatus for a battery includes:
the current acquisition unit 61 is used for activating and acquiring a first current value of the circuit at a first time interval; the circuit is a working circuit where a protected battery is located;
a current protection determination unit 62, configured to execute a current protection operation if the first current value meets a preset current protection trigger rule;
an electrical parameter acquisition unit 63, configured to activate and acquire a voltage value of the circuit and a temperature value of the protected battery at a second time interval;
an electrical protection determination unit 64, configured to execute an electrical protection operation if the voltage value and the temperature value satisfy a preset electrical protection trigger rule;
and the first time interval and the second time interval are set according to the corresponding relation between the preset priority and the acquisition time.
Optionally, the current protection determination unit 62 specifically includes:
the current protection triggering unit is used for judging whether the first current value is larger than a preset primary overcurrent value or not;
the short circuit judgment unit is used for judging whether the first current value is larger than a preset short circuit current value or not if the first current value is larger than the first-stage overcurrent value;
the short-circuit counting unit is used for starting a short-circuit protection counter to count if the first current value is larger than the short-circuit current value;
the short-circuit protection unit is used for executing short-circuit protection operation if the count value of the short-circuit protection counter meets a short-circuit protection triggering rule;
the overcurrent judging unit is used for judging whether to execute overcurrent protection operation according to the first current value and a preset overcurrent protection triggering rule if the first current value is smaller than the short-circuit current value;
and the overcurrent protection unit is used for executing overcurrent protection operation if the first current value meets the overcurrent protection triggering rule.
Optionally, the overcurrent determination unit specifically includes:
the second-stage overcurrent judging unit is used for judging whether the first current value is larger than a preset second-stage overcurrent value or not;
the second-stage overcurrent counting unit is used for starting a second-stage overcurrent counter to count if the first current value is greater than the second-stage overcurrent value and judging whether the count value of the second-stage overcurrent counter meets a second-stage overcurrent protection triggering rule or not;
the primary overcurrent counting unit is used for starting a primary overcurrent counter to count if the first current value is smaller than the secondary overcurrent value and judging whether the count value of the primary overcurrent counter meets a primary overcurrent protection triggering rule or not;
the overcurrent protection unit includes:
the secondary overcurrent protection unit is used for executing secondary overcurrent protection operation if the count value of the secondary overcurrent counter meets a secondary overcurrent protection triggering rule;
and the primary overcurrent protection unit is used for executing primary overcurrent protection operation if the count value of the primary overcurrent counter meets a primary overcurrent protection triggering rule.
Therefore, the battery protection device provided by the embodiment of the invention can also wake up the battery protection device intermittently at the first time interval and the second time interval, and the battery protection device executes the acquisition and detection operation of current, voltage or temperature only after waking up, and judges the acquired acquisition data according to the preset protection judgment rule, thereby reducing the power consumption of the battery protection device, prolonging the endurance time of the battery and improving the utilization efficiency of electric quantity. On the other hand, the user can determine the acquisition frequency of different electrical parameters according to different priorities, so that the applicability of the battery protection device is improved, and targeted battery protection measures can be executed according to different circuit environments.
Fig. 7 is a schematic diagram of a terminal device according to another embodiment of the present invention. As shown in fig. 7, the terminal device 7 of this embodiment includes: a processor 70, a memory 71 and a computer program 72, such as a battery protection program, stored in said memory 71 and operable on said processor 70. The processor 70, when executing the computer program 72, implements the steps in the above-described embodiments of the battery protection method, such as S101 to S104 shown in fig. 1. Alternatively, the processor 70, when executing the computer program 72, implements the functions of the units in the above-described device embodiments, such as the functions of the modules 61 to 64 shown in fig. 6.
Illustratively, the computer program 72 may be divided into one or more units, which are stored in the memory 71 and executed by the processor 70 to accomplish the present invention. The one or more units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program 72 in the terminal device 7. For example, the computer program 72 may be divided into a current collecting unit, a current protection determining unit, an electrical parameter collecting unit, and an electrical protection determining unit, and the specific functions of each unit are as follows:
the current acquisition unit is used for activating at a first time interval and acquiring a first current value of the circuit; the circuit is a working circuit where a protected battery is located;
the current protection judging unit is used for executing current protection operation if the first current value meets a preset current protection triggering rule;
the electric parameter acquisition unit is used for activating at a second time interval and acquiring a voltage value of the circuit and a temperature value of the protected battery;
the electric protection judging unit is used for executing electric protection operation if the voltage value and the temperature value meet a preset electric protection triggering rule;
and the first time interval and the second time interval are set according to the corresponding relation between the preset priority and the acquisition time.
The terminal device 7 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal device may include, but is not limited to, a processor 70, a memory 71. It will be appreciated by those skilled in the art that fig. 7 is merely an example of a terminal device 7 and does not constitute a limitation of the terminal device 7 and may comprise more or less components than shown, or some components may be combined, or different components, for example the terminal device may further comprise input output devices, network access devices, buses, etc.
The Processor 70 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 71 may be an internal storage unit of the terminal device 7, such as a hard disk or a memory of the terminal device 7. The memory 71 may also be an external storage device of the terminal device 7, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the terminal device 7. Further, the memory 71 may also include both an internal storage unit and an external storage device of the terminal device 7. The memory 71 is used for storing the computer program and other programs and data required by the terminal device. The memory 71 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. . Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; 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; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (6)
1. A method of protecting a battery, comprising:
activating and acquiring a first current value of the circuit at a first time interval; the circuit is a working circuit where a protected battery is located;
if the first current value meets a preset current protection triggering rule, executing current protection operation;
activating and acquiring a voltage value of the circuit and a temperature value of the protected battery at a second time interval;
if the voltage value and the temperature value meet a preset electrical protection triggering rule, executing electrical protection operation;
the first time interval and the second time interval are set according to the corresponding relation between the preset priority and the acquisition time;
if the first current value meets a preset current protection triggering rule, executing a current protection operation specifically comprises:
judging whether the first current value is larger than a preset primary overcurrent value or not; the primary overcurrent value is used for determining whether the circuit is in an overcurrent state;
if the first current value is larger than the first-stage overcurrent value, judging whether the first current value is larger than a preset short-circuit current value;
if the first current value is larger than the short-circuit current value, starting a short-circuit protection counter to count;
if the count value of the short-circuit protection counter meets the short-circuit protection triggering rule, executing short-circuit protection operation;
if the first current value is smaller than the short-circuit current value, judging whether to execute overcurrent protection operation according to the first current value and a preset overcurrent protection triggering rule;
if the first current value meets the overcurrent protection triggering rule, executing overcurrent protection operation;
the judging whether to execute the overcurrent protection operation according to the first current value and a preset overcurrent protection triggering rule specifically comprises:
judging whether the first current value is larger than a preset secondary overcurrent value or not; the secondary overcurrent value is greater than the primary overcurrent value and less than the short-circuit current value;
if the first current value is larger than the second-level overcurrent current value, starting a second-level overcurrent counter to count, and judging whether the count value of the second-level overcurrent counter meets a second-level overcurrent protection triggering rule or not;
if the first current value is smaller than the second-level overcurrent value, starting a first-level overcurrent counter to count, and judging whether the count value of the first-level overcurrent counter meets a first-level overcurrent protection triggering rule or not;
if the first current value meets the overcurrent protection triggering rule, executing overcurrent protection operation comprises:
if the count value of the secondary overcurrent counter meets a secondary overcurrent protection triggering rule, executing secondary overcurrent protection operation;
and if the count value of the primary overcurrent counter meets a primary overcurrent protection triggering rule, executing primary overcurrent protection operation.
2. The method according to claim 1, wherein if the count value of the short-circuit protection counter satisfies a short-circuit protection trigger rule, the performing of the short-circuit protection operation specifically comprises:
if the value of the short-circuit protection counter is larger than a first threshold value, executing the short-circuit protection operation;
if the count value of the secondary overcurrent counter meets a secondary overcurrent protection triggering rule, executing secondary overcurrent protection operation specifically comprises the following steps:
if the value of the secondary overcurrent counter is larger than a second threshold value, executing the secondary overcurrent protection operation;
if the count value of the primary overcurrent counter meets a primary overcurrent protection triggering rule, executing primary overcurrent protection operation specifically comprises the following steps:
if the value of the primary overcurrent counter is larger than a third threshold value, executing primary overcurrent protection operation;
wherein the second threshold is greater than the first threshold and less than the third threshold.
3. The method according to claim 1 or 2, wherein the determining whether the first current value is greater than a preset short-circuit current value if the first current value is greater than the primary overcurrent value comprises:
if the first current value is larger than the first-stage overcurrent value, acquiring a second current value of the circuit at the current moment;
and setting the second current value as a first current value, and judging whether the set first current value is larger than a primary overcurrent value or not.
4. A battery protection device, comprising:
the current acquisition unit is used for activating at a first time interval and acquiring a first current value of the circuit; the circuit is a working circuit where a protected battery is located;
the current protection judging unit is used for executing current protection operation if the first current value meets a preset current protection triggering rule;
the electrical parameter acquisition unit is used for activating at a second time interval and acquiring a voltage value of the circuit and a temperature value of the protected battery;
the electric protection judging unit is used for executing electric protection operation if the voltage value and the temperature value meet a preset electric protection triggering rule;
the first time interval and the second time interval are set according to the corresponding relation between the preset priority and the acquisition time;
the current protection determination unit specifically includes:
the current protection triggering unit is used for judging whether the first current value is larger than a preset primary overcurrent value or not; the primary overcurrent value is used for determining whether the circuit is in an overcurrent state;
the short circuit judgment unit is used for judging whether the first current value is larger than a preset short circuit current value or not if the first current value is larger than the first-stage overcurrent value;
the short-circuit counting unit is used for starting a short-circuit protection counter to count if the first current value is larger than the short-circuit current value;
the short-circuit protection unit is used for executing short-circuit protection operation if the count value of the short-circuit protection counter meets a short-circuit protection triggering rule;
the overcurrent judging unit is used for judging whether to execute overcurrent protection operation according to the first current value and a preset overcurrent protection triggering rule if the first current value is smaller than the short-circuit current value;
the overcurrent protection unit is used for executing overcurrent protection operation if the first current value meets the overcurrent protection triggering rule;
the overcurrent determination unit specifically includes:
the second-stage overcurrent judging unit is used for judging whether the first current value is larger than a preset second-stage overcurrent value or not; the secondary overcurrent value is greater than the primary overcurrent value and less than the short-circuit current value;
the second-stage overcurrent counting unit is used for starting a second-stage overcurrent counter to count if the first current value is greater than the second-stage overcurrent value and judging whether the count value of the second-stage overcurrent counter meets a second-stage overcurrent protection triggering rule or not;
the primary overcurrent counting unit is used for starting a primary overcurrent counter to count if the first current value is smaller than the secondary overcurrent value and judging whether the count value of the primary overcurrent counter meets a primary overcurrent protection triggering rule or not;
the overcurrent protection unit includes:
the secondary overcurrent protection unit is used for executing secondary overcurrent protection operation if the count value of the secondary overcurrent counter meets a secondary overcurrent protection triggering rule;
and the primary overcurrent protection unit is used for executing primary overcurrent protection operation if the count value of the primary overcurrent counter meets a primary overcurrent protection triggering rule.
5. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 3 when executing the computer program.
6. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 3.
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| CN112782459B (en) * | 2019-11-01 | 2022-11-15 | 广东美芝制冷设备有限公司 | Air conditioner and compressor phase current and PFC current sampling method and system thereof |
| CN113884888B (en) * | 2021-10-29 | 2024-01-02 | 章鱼博士智能技术(上海)有限公司 | Battery control method and device |
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