CN117040050B - Breaking control method, breaking control system, breaking control device and electronic equipment for circuit - Google Patents
Breaking control method, breaking control system, breaking control device and electronic equipment for circuit Download PDFInfo
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- CN117040050B CN117040050B CN202310922504.8A CN202310922504A CN117040050B CN 117040050 B CN117040050 B CN 117040050B CN 202310922504 A CN202310922504 A CN 202310922504A CN 117040050 B CN117040050 B CN 117040050B
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000011217 control strategy Methods 0.000 claims abstract description 77
- 230000004044 response Effects 0.000 claims description 16
- 238000005070 sampling Methods 0.000 claims description 15
- 238000004590 computer program Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000006870 function Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000002269 spontaneous effect Effects 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 238000013507 mapping Methods 0.000 description 4
- 230000005355 Hall effect Effects 0.000 description 3
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- 238000013021 overheating Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The disclosure provides a breaking control method, a breaking control system, a breaking control device and electronic equipment of a circuit, and relates to the technical field of short-circuit overcurrent protection, comprising the following steps: determining the current corresponding short-circuit time and short-circuit current value of the circuit; judging a first relation between the short-circuit current value and a current threshold value and a second relation between the short-circuit time and a short-circuit time threshold value; acquiring a breaking control strategy associated with the first relation and the second relation; and executing the breaking control strategy to control the active fuses and/or relays in the circuit. Therefore, a corresponding breaking control strategy can be provided for scenes with different short-circuit overcurrent specifications according to a first relation between the short-circuit current value and the current threshold value and a second relation between the short-circuit time and the short-circuit time threshold value, the effect of protecting high-voltage parts can be timely responded in scenes with different short-circuit overcurrent specifications, and the safety of a battery system of electric equipment is improved.
Description
Technical Field
The disclosure relates to the technical field of short-circuit overcurrent protection, and in particular relates to a breaking control method, a breaking control system, a breaking control device and electronic equipment of a circuit.
Background
The high-capacity lithium battery can enable electric equipment to have good endurance. However, lithium batteries also present some safety concerns. Lithium batteries, when subjected to short circuits or excessive currents, may cause high current discharge due to their low internal resistance and high energy density, creating safety problems such as overheating, ignition or explosion.
Currently, in order to improve cruising ability of new energy electric automobiles, a high-capacity lithium battery is generally adopted. If the high-voltage circuit is short-circuited, a passive fuse arranged in the system cannot be disconnected in time under the condition of high current, and the relay can be difficult to break due to adhesion risk, so that spontaneous combustion accidents can be caused.
Therefore, how to realize high-voltage breaking under the condition of short-circuit overcurrent in time and reliably is a problem to be solved at present.
Disclosure of Invention
The present disclosure aims to solve, at least to some extent, one of the technical problems in the related art.
An embodiment of a first aspect of the present disclosure provides a breaking control method of a circuit, including:
determining the current corresponding short-circuit time and short-circuit current value of the circuit;
judging a first relation between the short-circuit current value and a current threshold value and a second relation between the short-circuit time and a short-circuit time threshold value;
Acquiring a breaking control strategy associated with the first relation and the second relation;
and executing the breaking control strategy to control the active fuses and/or relays in the circuit.
An embodiment of a second aspect of the present disclosure provides a breaking control system of a circuit, including a battery management module, and a current sensor, an active fuse, and a relay connected to the battery management module, wherein,
the current sensor is used for collecting short-circuit current of the circuit;
the battery management module is used for:
judging a first relation between the short-circuit current value and a current threshold value and a second relation between the short-circuit time and a short-circuit time threshold value according to the short-circuit current and the short-circuit time of the circuit;
and acquiring a breaking control strategy associated with the first relation and the second relation, and controlling the active fuse and/or the relay based on the breaking control strategy.
An embodiment of a third aspect of the present disclosure provides a breaking control device for a circuit, including:
the determining module is used for determining the short-circuit time and the short-circuit current value corresponding to the current of the circuit;
the judging module is used for judging a first relation between the short-circuit current value and the current threshold value and a second relation between the short-circuit time and the short-circuit time threshold value;
The acquisition module is used for acquiring a breaking control strategy associated with the first relation and the second relation;
and the control module is used for executing the breaking control strategy so as to control the active fuse and/or the relay in the circuit.
An embodiment of a fourth aspect of the present disclosure proposes an electronic device, including: the circuit breaking control method comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes the circuit breaking control method according to the embodiment of the first aspect of the present disclosure when the processor executes the program.
An embodiment of a fifth aspect of the present disclosure proposes a non-transitory computer-readable storage medium storing a computer program which, when executed by a processor, implements a breaking control method of a circuit as proposed by an embodiment of the first aspect of the present disclosure.
The breaking control method, the breaking control system, the breaking control device, the breaking control electronic equipment and the breaking control storage medium for the circuit have the following beneficial effects:
in the embodiment of the disclosure, firstly, the short-circuit time and the short-circuit current value corresponding to the current of the circuit are determined, then, a first relation between the short-circuit current value and the current threshold value and a second relation between the short-circuit time and the short-circuit time threshold value are judged, then, a breaking control strategy associated with the first relation and the second relation is acquired, and then, the breaking control strategy is executed to control the active fuse and/or the relay in the circuit. Therefore, a corresponding breaking control strategy can be provided for scenes with different short-circuit overcurrent specifications according to a first relation between the short-circuit current value and the current threshold value and a second relation between the short-circuit time and the short-circuit time threshold value, the effect of protecting high-voltage parts can be timely responded in scenes with different short-circuit overcurrent specifications, high-voltage breaking can be timely and reliably realized under the condition of short-circuit overcurrent of a circuit, spontaneous combustion accidents are prevented, and the safety of a battery system of electric equipment is improved.
Additional aspects and advantages of the disclosure 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 disclosure.
Drawings
The foregoing and/or additional aspects and advantages of the present disclosure 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 flow chart of a breaking control method of a circuit according to an embodiment of the disclosure;
fig. 2 is a schematic flow chart of a breaking control method of another circuit according to an embodiment of the disclosure;
fig. 3 is a schematic flow chart of another method for controlling breaking of a circuit according to an embodiment of the disclosure;
fig. 4 is a current graph of a breaking control method of a circuit according to an embodiment of the present disclosure;
fig. 5 is a block diagram of a breaking control system of a circuit according to an embodiment of the present disclosure;
fig. 6 is a schematic view of a scenario structure of a breaking control system of a circuit according to an embodiment of the present disclosure;
fig. 7 is a block diagram of a circuit breaking control device according to an embodiment of the present disclosure;
FIG. 8 illustrates a block diagram of an exemplary computer device suitable for use in implementing embodiments of the present disclosure.
Detailed Description
Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present disclosure and are not to be construed as limiting the present disclosure.
A breaking control method, system, apparatus, electronic device, and storage medium of a circuit of an embodiment of the present disclosure are described below with reference to the drawings.
It should be noted that, in the embodiment of the present disclosure, the execution body of the circuit breaking control method is a circuit breaking control device, and the device may be implemented in a software and/or hardware manner, and the device may be configured in any electronic device. The method will be described below with a breaking control device of a circuit as an execution subject, hereinafter referred to as "device".
Fig. 1 is a schematic flow chart of a breaking control method of a circuit according to a first embodiment of the present disclosure.
As shown in fig. 1, the breaking control method of the circuit may include the steps of:
Step 101, determining the short-circuit time and the short-circuit current value corresponding to the circuit.
In the disclosed embodiments, the circuit may be a circuit of a vehicle electrical system, connected to a vehicle battery system, to be responsible for providing electrical power to various parts of the vehicle to support its normal running and functional operation. Alternatively, the circuit may be other circuits of the electric vehicle, such as a circuit of a charge control system, a hybrid power system, and a battery management system, which are not limited herein. Alternatively, the circuit may be any of an electronic device, an energy storage device, and a power device, and the present invention is not limited thereto.
The Short Circuit (Short Circuit) time refers to a time when a current starts to flow after a Short Circuit occurs in a Circuit. Specifically, the short-circuit time is calculated from the instant the short-circuit event begins.
The short-circuit current is an abnormally high current flowing in the circuit due to a short-circuit fault. When a short circuit occurs in a circuit, it is common for a low impedance path to occur between the conductors or circuit elements so that the current can bypass the normal load directly, resulting in an instantaneous increase in current that may cause damage to the circuit and equipment.
The short circuit current value comprises short circuit current obtained by sampling at least two current sensors, and sampling logic of the at least two current sensors for sampling the circuit current is different.
For example, current sampling may be performed by two current sensors, such as a Shunt current sensor (Shunt-based Current Sensor) and a hall current sensor (Hall Effect Sensor), without limitation.
The current sensor (also referred to as a resistive current sensor) is used to sample the current by measuring the voltage drop of the current across a shunt resistor, which is connected in series with the circuit to be measured, and the current I, i.e. i=v/R, can be calculated by ohm's law, where V is the voltage drop and R is the known resistance.
Wherein the hall current sensor utilizes the hall effect to measure current. In a hall current sensor, a hall element is placed on a path through which a current passes, and when the current passes, a magnetic field is generated, and according to the hall effect, a voltage difference is generated between both sides of the hall element, and by measuring the voltage difference, the magnitude of the current can be deduced.
Optionally, when the circuit is short-circuited, the protection device in the circuit correspondingly triggers the action, and the moment when the short-circuit current occurs can be determined by determining the response time of the protection device, so that the current short-circuit time is determined.
Alternatively, the voltage or current of the circuit may be subjected to transient analysis, so as to determine the starting time of occurrence of the short-circuit current, and further determine the current short-circuit time, which is not limited herein.
Step 102, a first relationship between the short circuit current value and the current threshold value, and a second relationship between the short circuit time and the short circuit time threshold value are determined.
The first relationship may be a relationship between a short-circuit current value and a current threshold value, and the second relationship may be a relationship between a short-circuit time and a short-circuit time threshold value.
The current threshold is one or more current thresholds, and is not limited herein.
The short-circuit time threshold may be one or more short-circuit time thresholds, and is not limited herein.
As an example, there may be 3 current thresholds, 1500A, 2000A and 3000A, respectively, without limitation. The number of short-circuit time thresholds may be 3, and may be 0.01s, 2s, or 10s, respectively, and is not limited herein.
As a possible implementation manner, the device may determine that the first relationship is that the short-circuit current value is greater than the current threshold value in a case where it is determined that the short-circuit currents sampled by the at least two current sensors are both greater than the current threshold value.
Alternatively, the apparatus may determine that the first relationship is that the short-circuit current value is smaller than the current threshold value in a case where it is determined that the short-circuit current sampled by at least one of the respective current sensors is smaller than the current threshold value.
Wherein the sampling logic of the at least two current sensors for sampling the circuit current may be different.
Example 1: if there are 2 current sensors, the current sensors are respectively a shunt current sensor A1 and a Hall current sensor A2, and the current sensors are different in sampling principle. If the current threshold is 1500A, the short-circuit current detected by a1 is 460A, and the short-circuit current detected by a2 is 1520A, both of which are greater than 1500A, then it may be determined that the first relationship is that the short-circuit current value is greater than the current threshold, that is, it may be determined that the circuit is currently in an overcurrent state.
However, if the short-circuit current detected by A1 is 1460A, and the short-circuit current detected by a2 is 1450A, both of which are smaller than the current threshold 1500A, the first relationship may be determined that the short-circuit current value is smaller than the current threshold, that is, it may not be possible to determine that the circuit is currently in an overcurrent state.
Or if two short-circuit currents obtained by monitoring in the A1 and the A2 are larger than the current threshold value and one is smaller than the current threshold value, the first relation can be determined as that the short-circuit current value is smaller than the current threshold value, that is, the current state of the circuit cannot be judged.
Example 2: if there are 2 current thresholds, 1500A and 2000A respectively, and the current detected by the two current sensors are 1800A, it can be determined that the first relationship is that the short-circuit current value is greater than 1500A and less than 2000A. If the short-circuit currents detected by the two current sensors are 1900A and 2100A, the first relationship may be determined that the short-circuit current value is greater than 1500A and less than 2000A.
The above examples are merely illustrative of embodiments of the present disclosure, and are not intended to limit the present disclosure.
It should be noted that, from this, can realize the multiple sampling of different current sensor and short circuit overcurrent identification, improved the reliability to overcurrent inspection. Through the collaborative work of a plurality of sensors, mutual verification is carried out, and the real overcurrent condition is identified only after each current sensor confirms the overcurrent condition, thereby effectively avoiding misjudgment of the overcurrent condition. The sampling logic of each current sensor is different, so that the result of the short-circuit overcurrent identification of each current sensor can prove the authenticity of the overcurrent from different dimensions.
A second relationship between the short-circuit time and the short-circuit time threshold is illustrated below.
For example, if the number of short-circuit time thresholds is 2, 2s and 10s, respectively, and the short-circuit time is 5s, the second relationship may be determined that the short-circuit time is greater than 2s and less than 10s, which is not limited herein.
The above examples are merely illustrative of embodiments of the present disclosure, and are not intended to limit the present disclosure.
And step 103, acquiring a breaking control strategy associated with the first relation and the second relation.
The breaking control strategy is used for controlling an active fuse and/or a relay in the circuit, so that high-voltage breaking is realized, and circuit devices are protected.
It should be noted that, a mapping relationship may be preset, where the mapping relationship is a breaking control policy corresponding to the first relationship and the second relationship.
For example, if the first relationship is A1 and the second relationship is A2, the device may obtain the breaking control policy B associated with A1 and A2 together according to the mapping relationship set in advance, which is not limited herein.
Optionally, if the second relationship is that the short-circuit time is less than the first time threshold, and the first relationship is that the short-circuit current value is greater than the third current threshold, determining that the breaking control strategy is to break the active fuse.
Wherein the first time threshold is used to characterize a shorter short time threshold, which is close to the instant. The third current threshold is used to characterize a higher short-circuit current, i.e. a high current.
As an example, in the embodiment of the present disclosure, the first time threshold may be 0.01s, and the third current threshold may be 3000A, which is not limited herein.
For example, if the current short-circuit time is 0.009s, and the second relationship is that the short-circuit time 0.009s is less than the first time threshold value 0.01s, and the first relationship is that the short-circuit current value is greater than the third current threshold value 3000A, the corresponding breaking control strategy is to break the active fuse.
Or if the second relation is that the short-circuit time is larger than the first time threshold and smaller than the second time threshold, and the first relation is that the short-circuit current value is larger than the second current threshold and smaller than the third current threshold, determining that the breaking control strategy is to sequentially break the active fuse and the relay.
Wherein the second time threshold is greater than the first time threshold and the second current threshold is less than the third current threshold.
As an example, in the embodiment of the present disclosure, the second time threshold may be 2s, and the second current threshold may be 2000A, which is not limited herein.
For example, if the current short-circuit time is 1.5s, and the second relationship is that the short-circuit time is 1.5s less than the second time threshold 2s and greater than the first time threshold 0.01s, and the first relationship is that the short-circuit current value is less than the third current threshold 3000A and greater than the second current threshold 2000A, the corresponding breaking control strategy is to sequentially break the active fuse and the relay.
It should be noted that the foregoing examples are merely illustrative, and the disclosure is not limited thereto.
Step 104, executing a breaking control strategy to control the active fuses and/or relays in the circuit.
By executing the breaking control strategy, the active fuse in the circuit can be controlled, or the relay can be controlled, or the active fuse and the relay can be controlled together.
The relay may be a reusable high-voltage relay, which is not limited herein.
Optionally, if the second relationship is that the short-circuit time is smaller than the first time threshold, the first relationship is that the short-circuit current value is larger than the third current threshold, and at this time, the breaking control strategy to be executed is to break the active fuse under the condition that the short-circuit current rises rapidly. The circuit can be cut off rapidly by controlling the active fuse to conduct high-voltage breaking so as to avoid the circuit from being damaged or malfunctioning. In addition, once overload or short circuit condition is relieved, the active fuse can be automatically reset, so that the circuit is restored to normal operation.
Optionally, if the second relationship is that the short-circuit time is greater than the first time threshold and less than the second time threshold, the first relationship is that the short-circuit current value is greater than the second current threshold and less than the third current threshold, and at this time, the short-circuit current rises rapidly, but does not exceed the third current threshold, so that the breaking control strategy may be implemented to sequentially break the active fuse and the relay, that is, break the active fuse first and then break the relay. Thus, the relay is prevented from explosion and fire danger caused by the action of opening the contact in the short-circuit current area by using the quick and disposable open active fuse to open the circuit connection in the high-short-circuit current area with short tolerance time of the parts.
If the short-circuit current value is larger than the second current threshold value and the third current threshold value, the short-circuit current is larger, and if the relay is directly opened, the risk of explosion and fire occurs, so that the active fuse can be opened first.
In the embodiment of the disclosure, firstly, the short-circuit time and the short-circuit current value corresponding to the current of the circuit are determined, then, a first relation between the short-circuit current value and the current threshold value and a second relation between the short-circuit time and the short-circuit time threshold value are judged, then, a breaking control strategy associated with the first relation and the second relation is acquired, and then, the breaking control strategy is executed to control the active fuse and/or the relay in the circuit. Therefore, a corresponding breaking control strategy can be provided for scenes with different short-circuit overcurrent specifications according to a first relation between the short-circuit current value and the current threshold value and a second relation between the short-circuit time and the short-circuit time threshold value, the effect of protecting high-voltage parts can be timely responded in scenes with different short-circuit overcurrent specifications, high-voltage breaking can be timely and reliably realized under the condition of short-circuit overcurrent of a circuit, spontaneous combustion accidents are prevented, and the safety of a battery system of electric equipment is improved.
Fig. 2 is a flow chart of a breaking control method of a circuit according to a second embodiment of the present disclosure.
As shown in fig. 2, the breaking control method of the circuit may include the steps of:
step 201, determining a short-circuit time and a short-circuit current value corresponding to the current of the circuit.
Step 202, determining a first relationship between the short circuit current value and the current threshold value, and a second relationship between the short circuit time and the short circuit time threshold value.
It should be noted that, the specific implementation manner of the steps 201 and 202 may refer to the above embodiments, and will not be described herein.
Step 203, if the second relationship is that the short-circuit time is greater than the second time threshold and less than the third time threshold, and the first relationship is that the short-circuit current value is greater than the first current threshold and less than the second current threshold, determining that the breaking control strategy is:
the relay is controlled to be disconnected, and whether the relay enters a disconnected state in a specified time period is judged;
the active fuse is controlled to open in response to determining that the relay has not entered the open state within a specified period of time.
Step 204, executing a breaking control strategy to control the active fuses and/or relays in the circuit.
The first current threshold is used for representing a current threshold corresponding to a lower short-circuit current value.
The third time threshold is used for representing a time threshold corresponding to the longer short circuit time.
As an example, in the embodiment of the present disclosure, the third time threshold may be 10s, and the first current threshold may be 1000A, which is not limited herein.
For example, if the short time is 9s, it is greater than the second time threshold 2s and less than the third time threshold 10s. If the short circuit current value is greater than the first current threshold 1000A and less than the second current threshold 2500A, determining a breaking control strategy as:
the relay is controlled to be disconnected, and whether the relay enters a disconnected state in a specified time period is judged;
the active fuse is controlled to open in response to determining that the relay has not entered the open state within a specified period of time.
It should be noted that, in the case that the relay may have adhesion risk and cause difficult disconnection, since the relay is currently located in the low short-circuit current area, the short-circuit tolerance capability of the low system is strong, and thus, a waiting time, that is, a specified time period, may be preset. Further, it can be determined whether the relay can be turned off within the specified period of time.
It can be appreciated that if the short circuit misjudgment is made at this time, the system can normally disconnect the relay and then disconnect the high voltage, so that the active fuse can not be disconnected, and the battery pack does not need to be maintained. If the short circuit is actually existed, the short circuit tolerance capability of the system is strong in the short circuit current area, and the system is allowed to have a certain time for judging that the high voltage condition can not be disconnected, and then the active fuse is disconnected.
In the embodiment of the disclosure, firstly, a short circuit time and a short circuit current value corresponding to a circuit at present are determined, then, a first relation between the short circuit current value and a current threshold value and a second relation between the short circuit time and the short circuit time threshold value are judged, and then, if the second relation is that the short circuit time is larger than the second time threshold value and smaller than the third time threshold value, the first relation is that the short circuit current value is larger than the first current threshold value and smaller than the second current threshold value, a breaking control strategy is determined: and controlling the relay to be disconnected, judging whether the relay enters a disconnected state within a specified time period, and finally controlling the active fuse to be disconnected in response to the fact that the relay does not enter the disconnected state within the specified time period, and executing a breaking control strategy to control the active fuse and/or the relay in the circuit. Therefore, the high-voltage relay can be disconnected firstly in a low short-circuit overcurrent area, and then the active fuse is disconnected, so that the aims of reducing the severity of erroneous judgment measures and correctly implementing the high-voltage disconnection action under the condition of real short-circuit overcurrent under the condition of erroneous judgment of a system are fulfilled.
Fig. 3 is a flowchart illustrating a breaking control method of a circuit according to a third embodiment of the present disclosure.
As shown in fig. 3, the breaking control method of the circuit may include the steps of:
step 301, in response to monitoring that the short circuit current value is greater than any current threshold, acquiring an overcurrent tolerance time associated with the any current threshold, and a breaking control strategy associated with the any current threshold.
Wherein different current thresholds correspond to different overcurrent tolerance times. If the short-circuit current value exceeds the current threshold value and the overcurrent time exceeding the current threshold value exceeds the overcurrent tolerance time, damage may be caused to the circuit device, resulting in a failure.
Alternatively, the corresponding current threshold and the overcurrent tolerance time may be set in advance according to the short-circuit currents of different specifications. Specifically, a mapping relation table may be preset to record the overcurrent tolerance time and the breaking control policy corresponding to any current threshold.
For example, if the current threshold is 1500A, the corresponding overcurrent tolerance time is 10s, if the current threshold is 2000A, the corresponding overcurrent tolerance time is 2s, and if the current threshold is 3000A, the corresponding overcurrent tolerance time is 0.01s, which is not limited herein.
Fig. 4 shows a current graph of a short-circuit current.
As shown in fig. 4, if the current short-circuit current is equal to 1500A for 3s, i.e., at the point a, and the overcurrent tolerance time corresponding to the current threshold 1500A is 10s, then the breaking control strategy corresponding to the current threshold 1500A needs to be executed within 10s after the start of 3s, whereas at the 4 th s, the current rapidly rises to 2000A, i.e., at the point B, and the overcurrent tolerance time corresponding to the current threshold 2000A is 2s, and then the breaking control strategy corresponding to 2000A needs to be executed within 2s after the point B, thereby realizing high voltage breaking.
It should be noted that the breaking control strategies associated with different current thresholds may also be different.
For example, if the current threshold is 3000A, the corresponding breaking control strategy may be to break the active fuse; if the current threshold is 2000A, the corresponding breaking control strategy can be to disconnect the active fuse and the relay in sequence; if the current threshold is 1500A, the corresponding breaking control strategy may be: the relay is controlled to open, and whether the relay enters an open state within a specified time period is judged, and the active fuse is controlled to open in response to determining that the relay does not enter the open state within the specified time period.
And step 302, executing the breaking control strategy in the overcurrent tolerance time.
For example, if any current threshold is 3000A, the overcurrent tolerance time is 0.01s, and then the breaking control strategy corresponding to any current threshold of 3000A needs to be executed within 0.01s, that is, the active fuse is broken.
It should be noted that, the specific implementation manner of each breaking control policy may refer to the above embodiment, and will not be described herein.
In the embodiment of the disclosure, firstly, in response to the fact that the short circuit current value is larger than any current threshold value, overcurrent tolerance time associated with the any current threshold value and breaking control strategies associated with the any current threshold value are obtained, and the breaking control strategies are executed within the overcurrent tolerance time. Therefore, corresponding breaking control strategies are provided for scenes with different short-circuit overcurrent specifications, and the breaking control strategies are executed within the overcurrent tolerance time, so that the high-voltage components can be timely responded and protected.
In order to implement the above embodiment, the present disclosure also proposes a breaking control system of a circuit.
Fig. 5 is a block diagram of a breaking control system of a circuit provided in a fourth embodiment of the present disclosure.
As shown in fig. 5, the breaking control system 50 of the circuit may include a battery management module 51, and a current sensor 52, an active fuse 54 and a relay 53 connected to the battery management module, wherein,
the current sensor is used for collecting short-circuit current of the circuit;
the battery management module is used for:
judging a first relation between a short-circuit current value and a current threshold value and a second relation between the short-circuit time and a short-circuit time threshold value according to the short-circuit current and the short-circuit time of the circuit;
and acquiring a breaking control strategy associated with the first relation and the second relation, and controlling the active fuse and/or the relay based on the breaking control strategy.
Optionally, there are at least two current sensors, and each current sensor samples the current of the circuit through different sampling logic.
It should be noted that, the specific implementation manner of the breaking control system of the circuit may refer to the above embodiment, and will not be described herein.
Fig. 6 is a schematic view of a scenario of a breaking control system of a circuit according to a fourth embodiment of the present disclosure.
As shown in fig. 6, the BMS is a battery management system, and the BMU is a battery management unit, wherein the BMU is connected with a hall current sensor and a shunt current sensor, a high voltage relay, an active fuse, a high voltage interlock, and a battery pack voltage. The battery management unit interacts with the VCU (Vehicle Control Unit ). Wherein the BMU interacts with CMUs (Cellular Modem Units, cellular management units) in a battery management system.
In the embodiment of the disclosure, the current sensor is used for collecting short-circuit current of a circuit, the battery management module is used for judging a first relation between a short-circuit current value and a current threshold value and a second relation between the short-circuit time and the short-circuit time threshold value according to the short-circuit current and the short-circuit time of the circuit, then acquiring a breaking control strategy associated with the first relation and the second relation, and controlling the active fuse and/or the relay based on the breaking control strategy. Therefore, a corresponding breaking control strategy can be provided for scenes with different short-circuit overcurrent specifications according to a first relation between the short-circuit current value and the current threshold value and a second relation between the short-circuit time and the short-circuit time threshold value, the effect of protecting high-voltage parts can be timely responded in scenes with different short-circuit overcurrent specifications, high-voltage breaking can be timely and reliably realized under the condition of short-circuit overcurrent of a circuit, spontaneous combustion accidents are prevented, and the safety of a battery system of electric equipment is improved.
In order to achieve the above embodiments, the present disclosure also proposes a breaking control device of a circuit.
Fig. 7 is a block diagram showing a structure of a breaking control device of a circuit provided in a fourth embodiment of the present disclosure.
As shown in fig. 7, the breaking control device 700 of the circuit may include:
a determining module 710, configured to determine a short-circuit time and a short-circuit current value corresponding to the current of the circuit;
a judging module 720, configured to judge a first relationship between the short-circuit current value and a current threshold value, and a second relationship between the short-circuit time and a short-circuit time threshold value;
an obtaining module 730, configured to obtain a breaking control policy associated with the first relationship and the second relationship;
and a control module 740 for executing the breaking control strategy to control the active fuses and/or relays in the circuit.
Optionally, the short time threshold includes a first time threshold, a second time threshold, and a third time threshold, the current threshold includes a first current threshold, a second current threshold, and a third current threshold,
the acquisition module is specifically configured to:
if the second relation is that the short-circuit time is smaller than the first time threshold, and the first relation is that the short-circuit current value is larger than the third current threshold, determining that the breaking control strategy is to break the active fuse;
or,
if the second relationship is that the short-circuit time is greater than the first time threshold and less than the second time threshold, the first relationship is that the short-circuit current value is greater than the second current threshold and less than the third current threshold, determining that the breaking control strategy is to sequentially break the active fuse and the relay,
Wherein the second current threshold is greater than the first current threshold and less than the third current threshold, and the second time threshold is greater than the first time threshold and less than the third time threshold.
Optionally, the acquiring module is specifically configured to:
if the second relationship is that the short-circuit time is greater than the second time threshold and less than the third time threshold, and the first relationship is that the short-circuit current value is greater than the first current threshold and less than the second current threshold, determining that the breaking control strategy is:
controlling the relay to be disconnected, and judging whether the relay enters a disconnected state in a specified time period;
the active fuse is controlled to open in response to determining that the relay does not enter an open state within the specified period of time.
Optionally, the short-circuit current value comprises short-circuit currents sampled by at least two current sensors, sampling logic of the at least two current sensors for sampling the circuit currents is different,
the judging module is specifically configured to:
determining that the short circuit current value is larger than the current threshold value in response to determining that the short circuit currents sampled by the at least two current sensors are larger than the current threshold value;
Or,
and in response to determining that the short circuit current sampled by at least one of the current sensors is less than the current threshold, determining that the first relationship is that the short circuit current value is less than the current threshold.
Optionally, the device further includes:
the monitoring module is used for responding to the fact that the short-circuit current value is larger than any current threshold value, obtaining overcurrent tolerance time associated with any current threshold value and breaking control strategies associated with any current threshold value;
and the execution module is used for executing the breaking control strategy in the overcurrent tolerance time.
In the embodiment of the disclosure, firstly, the short-circuit time and the short-circuit current value corresponding to the current of the circuit are determined, then, a first relation between the short-circuit current value and the current threshold value and a second relation between the short-circuit time and the short-circuit time threshold value are judged, then, a breaking control strategy associated with the first relation and the second relation is acquired, and then, the breaking control strategy is executed to control the active fuse and/or the relay in the circuit. Therefore, a corresponding breaking control strategy can be provided for scenes with different short-circuit overcurrent specifications according to a first relation between the short-circuit current value and the current threshold value and a second relation between the short-circuit time and the short-circuit time threshold value, the effect of protecting high-voltage parts can be timely responded in scenes with different short-circuit overcurrent specifications, high-voltage breaking can be timely and reliably realized under the condition of short-circuit overcurrent of a circuit, spontaneous combustion accidents are prevented, and the safety of a battery system of electric equipment is improved.
To achieve the above embodiments, the present disclosure further proposes a computer device including: the circuit breaking control method comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes the circuit breaking control method according to the previous embodiment of the disclosure when executing the program.
In order to achieve the above-described embodiments, the present disclosure also proposes a non-transitory computer-readable storage medium storing a computer program which, when executed by a processor, implements a breaking control method of a circuit as proposed in the foregoing embodiments of the present disclosure.
In order to implement the above-described embodiments, the present disclosure also proposes a computer program product which, when executed by an instruction processor in the computer program product, performs a breaking control method of a circuit as proposed by the foregoing embodiments of the present disclosure.
FIG. 8 illustrates a block diagram of an exemplary computer device suitable for use in implementing embodiments of the present disclosure. The computer device 12 shown in fig. 8 is merely an example and should not be construed as limiting the functionality and scope of use of the disclosed embodiments.
As shown in FIG. 8, the computer device 12 is in the form of a general purpose computing device. Components of computer device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, a bus 18 that connects the various system components, including the system memory 28 and the processing units 16.
Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, and a local bus using any of a variety of bus architectures. By way of example, and not limitation, such architectures include industry Standard architecture (Industry Standard Architecture; hereinafter ISA) bus, micro channel architecture (Micro Channel Architecture; hereinafter MAC) bus, enhanced ISA bus, video electronics standards Association (Video Electronics Standards Association; hereinafter VESA) local bus, and peripheral component interconnect (Peripheral Component Interconnection; hereinafter PCI) bus.
Computer device 12 typically includes a variety of computer system readable media. Such media can be any available media that is accessible by computer device 12 and includes both volatile and nonvolatile media, removable and non-removable media.
Memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (Random Access Memory; hereinafter: RAM) 30 and/or cache memory 32. The computer device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from or write to non-removable, nonvolatile magnetic media (not shown in FIG. 8, commonly referred to as a "hard disk drive"). Although not shown in fig. 8, a magnetic disk drive for reading from and writing to a removable non-volatile magnetic disk (e.g., a "floppy disk"), and an optical disk drive for reading from or writing to a removable non-volatile optical disk (e.g., a compact disk read only memory (Compact Disc Read Only Memory; hereinafter CD-ROM), digital versatile read only optical disk (Digital Video Disc Read Only Memory; hereinafter DVD-ROM), or other optical media) may be provided. In such cases, each drive may be coupled to bus 18 through one or more data medium interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to carry out the functions of the various embodiments of the disclosure.
A program/utility 40 having a set (at least one) of program modules 42 may be stored in, for example, memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment. Program modules 42 generally perform the functions and/or methods in the embodiments described in this disclosure.
The computer device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), one or more devices that enable a user to interact with the computer device 12, and/or any devices (e.g., network card, modem, etc.) that enable the computer device 12 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 22. Moreover, the computer device 12 may also communicate with one or more networks such as a local area network (Local Area Network; hereinafter LAN), a wide area network (Wide Area Network; hereinafter WAN) and/or a public network such as the Internet via the network adapter 20. As shown, network adapter 20 communicates with other modules of computer device 12 via bus 18. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with computer device 12, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.
The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, for example, implementing the methods mentioned in the foregoing embodiments.
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 disclosure. 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 disclosure, the meaning of "a plurality" is at least two, such as two, three, etc., unless explicitly specified otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present disclosure in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present disclosure.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It should be understood that portions of the present disclosure may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As with the other embodiments, if implemented in hardware, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
Furthermore, each functional unit in the embodiments of the present disclosure 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 disclosure have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the present disclosure, 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 present disclosure.
Claims (9)
1. A breaking control method of a circuit, characterized by comprising:
determining the current corresponding short-circuit time and short-circuit current value of the circuit;
judging a first relation between the short-circuit current value and a current threshold value and a second relation between the short-circuit time and a short-circuit time threshold value;
acquiring a breaking control strategy associated with the first relation and the second relation;
executing the breaking control strategy to control an active fuse and/or a relay in the circuit;
further comprises:
in response to monitoring that the short circuit current value is greater than any current threshold, acquiring overcurrent tolerance time associated with the any current threshold and breaking control strategies associated with the any current threshold, wherein different current thresholds correspond to different overcurrent tolerance times;
Executing the breaking control strategies within the overcurrent tolerance time, wherein the breaking control strategies associated with different current thresholds are different.
2. The method of claim 1, wherein the short time threshold comprises a first time threshold, a second time threshold, and a third time threshold, wherein the current threshold comprises a first current threshold, a second current threshold, and a third current threshold,
the obtaining a breaking control policy associated with the first relationship and the second relationship includes:
if the second relation is that the short-circuit time is smaller than the first time threshold, and the first relation is that the short-circuit current value is larger than the third current threshold, determining that the breaking control strategy is to break the active fuse;
or,
if the second relationship is that the short-circuit time is greater than the first time threshold and less than the second time threshold, the first relationship is that the short-circuit current value is greater than the second current threshold and less than the third current threshold, determining that the breaking control strategy is to sequentially break the active fuse and the relay,
wherein the second current threshold is greater than the first current threshold and less than the third current threshold, and the second time threshold is greater than the first time threshold and less than the third time threshold.
3. The method of claim 2, wherein the obtaining a breaking control policy associated with the first relationship and the second relationship comprises:
if the second relationship is that the short-circuit time is greater than the second time threshold and less than the third time threshold, and the first relationship is that the short-circuit current value is greater than the first current threshold and less than the second current threshold, determining that the breaking control strategy is:
controlling the relay to be disconnected, and judging whether the relay enters a disconnected state in a specified time period;
the active fuse is controlled to open in response to determining that the relay does not enter an open state within the specified period of time.
4. The method of claim 1, wherein the short circuit current value comprises a short circuit current sampled by at least two current sensors, the sampling logic of the at least two current sensors for sampling the circuit current being different,
the determining a first relationship between the short circuit current value and a current threshold value includes:
determining that the short circuit current value is larger than the current threshold value in response to determining that the short circuit currents sampled by the at least two current sensors are larger than the current threshold value;
Or,
and in response to determining that the short circuit current sampled by at least one of the current sensors is less than the current threshold, determining that the first relationship is that the short circuit current value is less than the current threshold.
5. A breaking control system is characterized by comprising a battery management module, a current sensor, an active fuse and a relay, wherein the current sensor, the active fuse and the relay are connected with the battery management module,
the current sensor is used for collecting short-circuit current of the circuit;
the battery management module is used for:
judging a first relation between the short-circuit current value and a current threshold value and a second relation between the short-circuit time and a short-circuit time threshold value according to the short-circuit current and the short-circuit time of the circuit;
acquiring a breaking control strategy associated with the first relation and the second relation, and controlling the active fuse and/or the relay based on the breaking control strategy;
further comprises:
in response to monitoring that the short circuit current value is greater than any current threshold, acquiring overcurrent tolerance time associated with the any current threshold and breaking control strategies associated with the any current threshold, wherein different current thresholds correspond to different overcurrent tolerance times;
Executing the breaking control strategies within the overcurrent tolerance time, wherein the breaking control strategies associated with different current thresholds are different.
6. The system of claim 5, wherein there are at least two of said current sensors, and each of said current sensors current samples said circuit by different sampling logic.
7. A breaking control device of a circuit, characterized by comprising:
the determining module is used for determining the short-circuit time and the short-circuit current value corresponding to the current of the circuit;
the judging module is used for judging a first relation between the short-circuit current value and the current threshold value and a second relation between the short-circuit time and the short-circuit time threshold value;
the acquisition module is used for acquiring a breaking control strategy associated with the first relation and the second relation;
the control module is used for executing the breaking control strategy so as to control the active fuses and/or relays in the circuit;
further comprises:
in response to monitoring that the short circuit current value is greater than any current threshold, acquiring overcurrent tolerance time associated with the any current threshold and breaking control strategies associated with the any current threshold, wherein different current thresholds correspond to different overcurrent tolerance times;
Executing the breaking control strategies within the overcurrent tolerance time, wherein the breaking control strategies associated with different current thresholds are different.
8. The apparatus of claim 7, wherein the short time threshold comprises a first time threshold, a second time threshold, and a third time threshold, wherein the current threshold comprises a first current threshold, a second current threshold, and a third current threshold,
the acquisition module is specifically configured to:
if the second relation is that the short-circuit time is smaller than the first time threshold, and the first relation is that the short-circuit current value is larger than the third current threshold, determining that the breaking control strategy is to break the active fuse;
or,
if the second relationship is that the short-circuit time is greater than the first time threshold and less than the second time threshold, the first relationship is that the short-circuit current value is greater than the second current threshold and less than the third current threshold, determining that the breaking control strategy is to sequentially break the active fuse and the relay,
wherein the second current threshold is greater than the first current threshold and less than the third current threshold, and the second time threshold is greater than the first time threshold and less than the third time threshold.
9. An electronic device, comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing a method of controlling breaking of a circuit as claimed in any one of claims 1 to 4 when the program is executed.
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| CN114843995A (en) * | 2022-05-31 | 2022-08-02 | 深圳英恒电子有限公司 | Control method of vehicle-mounted solid-state relay |
| CN114851852A (en) * | 2022-06-08 | 2022-08-05 | 广州小鹏汽车科技有限公司 | Short-circuit protection system and power battery system of electric vehicle |
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| CN114843995A (en) * | 2022-05-31 | 2022-08-02 | 深圳英恒电子有限公司 | Control method of vehicle-mounted solid-state relay |
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