CN115257459A

CN115257459A - A battery pack detection system control method and readable storage medium

Info

Publication number: CN115257459A
Application number: CN202211060287.8A
Authority: CN
Inventors: 熊本波; 雷晶晶; 欧阳文斌; 卓浩; 陈斌斌
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Sunwoda Electric Vehicle Battery Co Ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2022-11-01

Abstract

The invention discloses a battery pack detection system, a control method and a readable storage medium, which can directly take electricity from the output end of a battery pack through a BUCK power supply, thereby directly completing the power supply of a high-voltage detection system, avoiding the need of taking electricity from a control box and simplifying a power supply mechanism. Meanwhile, the operating state detection unit can continuously detect the working current and the working voltage of the battery pack, so that the fusing control module can be actively controlled to drive the fuse to complete fusing when the current and the voltage are abnormal, and the safety of a vehicle is ensured. In addition, the invention realizes the independent detection of various signals collected by the running state detection unit and the control of the fusing control module through the core controller, does not need the auxiliary detection of the main control box, and the main control box can obtain the detection signals only by interacting with the battery pack detection system, thereby effectively reducing the number of external wire harnesses of the main control box and simplifying the circuit connection.

Description

Battery pack detection system, control method and readable storage medium

Technical Field

The invention relates to the field of new energy automobiles, in particular to a battery pack detection system, a control method and a readable storage medium.

Background

With the development of science and technology and economy, the technology of the new energy automobile is greatly improved, and the new energy automobile gradually enters the homes of more residents. The battery package is the indispensable component part among the new energy automobile, and the good or bad just can serious influence new energy automobile's driving experience of battery package, and simultaneously, the battery package needs battery energy management unit's effective management just can guarantee normal safe work.

At present, various detection functions in the battery energy management unit can be completed only by controlling the high-voltage board through the main control box of the battery energy management unit, but the current high-voltage board needs the main control box to provide an independent isolation power supply, so that the whole power supply structure is complex. Meanwhile, the conventional high-pressure plate does not have the capability of actively executing safety protection, so that effective guarantee is difficult to provide for the safety of vehicles. In addition, because the main control box needs to realize the detection function through controlling the high-voltage board, consequently also lead to the main control box to need the external pencil of connecting more, increased the degree of difficulty of assembly and debugging, also increased the degree of difficulty of later stage troubleshooting.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a battery pack detection system, which solves the problems that a main control box is required to provide a single power supply and cannot actively execute safety actions, and effectively simplifies the circuit connection.

The present invention also provides a control method of the battery pack inspection system and a computer-readable storage medium for performing the control method of the battery pack inspection system.

The battery pack detection system according to an embodiment of the first aspect of the present invention includes:

the input end of the BUCK power supply is connected with the output end of the battery pack;

the running state detection unit is used for detecting the working current and the working voltage of the battery pack;

the fusing control module is provided with a fusing control end, a fusing input end and a fusing output end, the fusing input end is connected with the output end of the BUCK power supply, the fusing output end is used for being connected with a ground wire, and the fusing control module is used for adjusting the working state of the fuse protector;

the core controller is respectively connected with the running state detection unit and the fusing control end;

and the communication module is connected with the core controller.

The battery pack detection system provided by the embodiment of the invention at least has the following beneficial effects:

can realize directly getting the electricity from the output of battery package through the BUCK power to directly accomplish the power supply to high-voltage detection system, no longer need get the electricity from the control box, simplified the power supply mechanism. Meanwhile, the operating state detection unit can continuously detect the working current and the working voltage of the battery pack, so that the fusing control module can be actively controlled to drive the fuse to complete fusing when the current and the voltage are abnormal, and the safety of a vehicle is ensured. In addition, the core controller adopted by the battery pack detection system of the embodiment of the invention realizes independent detection of various signals collected by the running state detection unit and control of the fusing control module, detection is not required to be assisted by the main control box, and the main control box can acquire detection signals only by interacting with the battery pack detection system, so that the number of external wire harnesses of the main control box is effectively reduced, and the line connection is simplified.

According to some embodiments of the invention, the fuse control module comprises:

the switching circuit is provided with a switching input end, a switching output end and a first controlled end, the first controlled end is connected with the core controller, and the switching input end is connected with the output end of the BUCK power supply;

the high-side driving module is provided with a high-side input end, a high-side output end and a second controlled end, the second controlled end is connected with the core controller, the high-side input end is connected with the switch output end, the high-side output end is connected with one end of a coil of the fuse, and a first resistor is connected between the high-side input end and the high-side output end;

the second resistor is connected between the high-side input end and the output end of the BUCK power supply;

the low-side driving module is provided with a low-side input end, a low-side output end and a third controlled end, the third controlled end is connected with the core controller, the low-side input end is connected with the other end of the coil of the fuse, the low-side output end is connected with a ground wire, the low-side input end is connected with a third resistor between the low-side output ends, and the low-side input end is used for outputting a voltage sampling value to the core controller.

According to some embodiments of the invention, the switching circuit comprises:

the source electrode of the MOS tube is connected with the output end of the BUCK power supply, the drain electrode of the MOS tube is connected with the high-side input end, and a fourth resistor is connected between the grid electrode and the source electrode;

and a fifth resistor is connected between the collector of the triode and the grid of the MOS tube, the collector is connected with a ground wire, a capacitor is connected between the collector and the output end of the BUCK power supply, and the base is connected with the core controller.

According to some embodiments of the invention, the operation state detection unit comprises:

a current detection module connected with the core controller, the working current of the battery pack is detected;

a total pressure insulation detection module connected with the core controller, the battery pack detection circuit is used for detecting the working voltage of the battery pack and the working insulation of the battery pack.

According to some embodiments of the invention, the operating state detection unit further comprises a temperature detection module connected to the core controller.

According to some embodiments of the invention, the ground terminal of the temperature detection module is connected to the negative electrode of the battery pack at the same potential.

The control method of the battery pack detection system according to the second aspect of the present invention is applied to the battery pack detection system described above, and includes:

acquiring running state data, wherein the running state data at least comprise the working current and the working voltage of the battery pack, which are acquired by a running state detection unit;

and if the running state data represents the state fault of the battery pack, controlling the fusing control module to drive the fuse to fuse so as to stop outputting the battery pack.

The control method of the battery pack detection system provided by the embodiment of the invention at least has the following beneficial effects:

through the operating condition data such as the operating current of real-time detection battery package and operating voltage to can be when the battery package appears the state trouble, the initiative control fusing control module drive the fuse fuses, breaks off the output of battery package, thereby ensures vehicle and personnel's safety. In addition, the control method of the battery pack detection system provided by the embodiment of the invention is realized based on the battery pack detection system, so that the control method has the beneficial effects brought by the battery pack detection system.

According to some embodiments of the invention, the control method further comprises:

and if the running state data represents that the battery pack is normal in state, controlling the fusing control module to perform self-checking so as to obtain fault detection information of the fusing control module.

According to some embodiments of the invention, the fuse control module comprises a switch circuit, a high side driving module, a second resistor, and a low side driving module; the switch circuit is provided with a switch input end, a switch output end and a first controlled end, the first controlled end is connected with the core controller, and the switch input end is connected with the output end of the BUCK power supply; the high-side driving module is provided with a high-side input end, a high-side output end and a second controlled end, the second controlled end is connected with the core controller, the high-side input end is connected with the switch output end, the high-side output end is connected with one end of a coil of the fuse, and a first resistor is connected between the high-side input end and the high-side output end; the second resistor is connected between the high-side input end and the output end of the BUCK power supply; the low-side driving module is provided with a low-side input end, a low-side output end and a third controlled end, the third controlled end is connected with the core controller, the low-side input end is connected with the other end of the coil of the fuse, the low-side output end is connected with a ground wire, and a third resistor is connected between the low-side input end and the low-side output end;

the controlling the fusing control module to perform self-checking includes:

controlling the switching circuit, the high-side driving module and the low-side driving module to be disconnected, and acquiring a first voltage sampling value output by the low-side input end;

controlling the switch circuit to be closed, controlling the high-side driving module and the low-side driving module to be disconnected, and acquiring a second voltage sampling value output by the low-side input end;

controlling the high-side driving module to be closed, controlling the switching circuit and the low-side driving module to be disconnected, and acquiring a third voltage sampling value output by the low-side input end;

controlling the low-side driving module to be closed, controlling the switching circuit and the high-side driving module to be disconnected, and acquiring a fourth voltage sampling value output by the low-side input end;

and determining the fault detection information according to the first voltage sampling value, the second voltage sampling value, the third voltage sampling value and the fourth voltage sampling value.

The computer-readable storage medium according to the third aspect of the present invention stores computer-executable instructions for executing the control method of the battery pack detection system according to the second aspect of the present invention. Since the computer-readable storage medium adopts all the technical solutions of the control method of the battery pack detection system of the above embodiment, at least all the advantages brought by the technical solutions of the above embodiments are achieved.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a system diagram of a battery pack inspection system according to an embodiment of the present invention;

fig. 2 is a flowchart of a control method of a battery pack detection system according to an embodiment of the present invention;

FIG. 3 is a flow chart of a self-test of the fuse control module according to an embodiment of the invention.

Reference numerals:

BUCK power supply 100,

A fuse control module 200, a switch circuit 210, a high side driving module 220, a low side driving module 230,

A core controller 300,

A communication module 400,

A current detection module 510, a total voltage insulation detection module 520, a temperature detection module 530,

Battery pack 610, fuse 620.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, if there are first, second, etc. described, it is only for the purpose of distinguishing technical features, and it is not understood that relative importance is indicated or implied or that the number of indicated technical features is implicitly indicated or that the precedence of the indicated technical features is implicitly indicated.

In the description of the present invention, it should be understood that the orientation descriptions, such as the orientation or positional relationship indicated by upper, lower, etc., are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise explicitly defined, terms such as arrangement, installation, connection and the like should be broadly understood, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the embodiments described below are some, but not all embodiments of the present invention.

Referring to fig. 1, fig. 1 is a system diagram of a battery pack detection system according to an embodiment of the present invention, the battery pack detection system includes a BUCK power supply 100, an operation state detection unit, a fuse control module 200, a core controller 300, and a communication module 400,

the BUCK power supply 100, wherein the input end of the BUCK power supply 100 is connected with the output end of the battery pack 610;

an operation state detection unit for detecting an operation current and an operation voltage of the battery pack 610;

the fusing control module 200 is provided with a fusing control end, a fusing input end and a fusing output end, the fusing input end is connected with the output end of the BUCK power supply 100, the fusing output end is used for being connected with a ground wire, and the fusing control module 200 is used for adjusting the working state of the fuse 620;

a core controller 300 connected to the operation state detection unit and the fusing control terminal, respectively;

the communication module 400 is connected to the core controller 300.

As shown in fig. 1, the positive input terminal and the negative input terminal of the BUCK power supply 100 are directly connected to the positive electrode and the negative electrode of the battery pack 610, so that the battery pack 610 can be directly powered, and the higher voltage output by the battery pack 610 can be reduced to the lower working voltage required by the control and detection part of the whole battery pack detection system due to the power supply characteristics of the BUCK power supply 100. The operation state detection unit is composed of a plurality of sensors or monitoring circuits, can effectively complete detection of working current and working voltage, and transmits the detection result to the core controller 300, and the core controller 300 can transmit the data to the main controller in the main control box through the communication module 400 after acquiring the data, thereby simplifying connection of the main control box. Meanwhile, after the core controller 300 receives the operating current and operating voltage data of the battery pack 610, if the current or voltage is abnormal, the fusing control module 200 may also be directly controlled to drive the coil of the fuse 620 to operate, so that the fuse 620 fuses, and the output of the battery pack 610 is disconnected.

The battery pack detection system provided by the embodiment of the invention can directly take power from the output end of the battery pack 610 through the BUCK power supply 100, so that the power supply of the high-voltage detection system is directly completed, the power taking from a control box is not needed, and the power supply mechanism is simplified. Meanwhile, the operating state detection unit can continuously detect the working current and the working voltage of the battery pack 610, so that the fusing control module 200 is actively controlled to drive the fuse 620 to complete fusing when the current and the voltage are abnormal, and the safety of the vehicle is ensured. In addition, the core controller 300 adopted by the battery pack detection system of the embodiment of the invention realizes independent detection of various signals collected by the operation state detection unit and control of the fusing control module 200, detection is not required to be assisted by the main control box, and the main control box can acquire detection signals only by interacting with the battery pack detection system, so that the number of external wire harnesses of the main control box is effectively reduced, and the line connection is simplified. Meanwhile, the core controller 300 is adopted for detection, so that the occupation of the computing resources of the battery management unit can be reduced.

In some embodiments, the fuse control module 200 includes a switch circuit 210, a high side driver module 220, a low side driver module 230, a first resistor R2,

a switch circuit 210 having a switch input terminal, a switch output terminal, and a first controlled terminal, the first controlled terminal being connected to the core controller 300, the switch input terminal being connected to the output terminal of the BUCK power supply 100;

the high-side driving module 220 is provided with a high-side input end, a high-side output end and a second controlled end, the second controlled end is connected with the core controller 300, the high-side input end is connected with the switch output end, the high-side output end is connected with one end of a coil of the fuse 620, and a first resistor R3 is connected between the high-side input end and the high-side output end;

a first resistor R2 connected between the high-side input terminal and the output terminal of the BUCK power supply 100;

the low-side driving module 230 has a low-side input end, a low-side output end and a third controlled end, the third controlled end is connected with the core controller 300, the low-side input end is connected with the other end of the coil of the fuse 620, the low-side output end is connected with a ground wire, a third resistor R4 is connected between the low-side input end and the low-side output end, and the low-side input end is used for outputting a voltage sampling value to the core controller 300.

Referring to fig. 1, when the coil of the fuse 620 needs to be driven to operate, the switching circuit 210, the high-side driving module 220, and the low-side driving module 230 need to be turned on at the same time, so that the coil current passing through the fuse 620 exceeds a threshold value, the coil starts to perform a fusing operation, the fuse of the main circuit of the fuse 620 fuses, and the output of the battery pack 610 is disconnected.

When fuse 620 is not needed to perform fusing work, self-checking can be performed to continuously know the functional states of the switch circuit 210, the high-side driving module 220 and the low-side driving module 230 in the fusing control module 200, and the condition that the fusing control module 200 fails when fusing is needed is avoided, so that the output of the battery pack 610 cannot be disconnected, and safety accidents are caused. It should be noted that, when the current passing through the coil of the fuse 620 is greater than the threshold, the fuse 620 will start to blow, so that it is ensured that the blowing will not be triggered as long as the current passing through the fuse 620 is controlled not to exceed the threshold, and the self-test of the blowing control module 200 can be completed by using this point. Through setting up first resistance R3, first resistance R2 and third resistance R4 to after switching circuit 210, high limit drive module 220, low limit drive module 230 are switched on respectively, make low limit drive module 230's low limit input output different voltage value, thereby can accomplish switching circuit 210, high limit drive module 220, low limit drive module 230's detection respectively.

In some embodiments, the switching circuit 210 includes a MOS transistor Q1, a transistor Q2,

the MOS transistor Q1 is characterized in that a source electrode of the MOS transistor Q1 is connected with the output end of the BUCK power supply 100, a drain electrode of the MOS transistor Q1 is connected with a high-side input end, and a fourth resistor R5 is connected between a grid electrode and the source electrode;

and a fifth resistor R6 is connected between the collector of the triode Q2 and the grid of the MOS tube Q1, the collector is connected with a ground wire, a capacitor C1 is connected between the collector and the output end of the BUCK power supply 100, and the base is connected with the core controller 300.

As shown in fig. 1, the on/off of the transistor Q2 is controlled by the core controller 300, the core controller 300 controls the on/off of the MOS transistor Q1 by controlling the on/off of the transistor Q2, and then the fuse control of the fuse 620 and the self-test of the fuse control module 200 can be completed by using the on/off of the MOS transistor Q1, the high side driving module 220, and the low side driving module 230.

In some embodiments, the operation state detection unit includes: the current detection module 510, the total voltage insulation detection module 520, and the current detection module 510 are connected to the core controller 300, and are configured to detect a working current of the battery pack 610;

and the total pressure insulation detection module 520 is connected with the core controller 300 and is used for detecting the working voltage of the battery pack 610 and the working insulation of the battery pack 610.

The detection of the working current, the working voltage and the working insulation of the battery pack 610 can be completed through the current detection module 510 and the total voltage insulation detection module 520, so that the protection action can be actively triggered when the current is too large, the voltage is too high, and the insulation is too low, and the disaster caused by the fault is reduced.

As shown in fig. 1, the current detection module 510 includes a sixth resistor R7 and an operational amplification unit U1, where the sixth resistor R7 is connected in series in a power supply loop of the battery pack 610, so as to convert a working current signal of the battery pack 610 into a voltage signal, and the voltage signal is processed by the operational amplification unit U1 and then input to the core controller 300, thereby completing current detection.

As shown in fig. 1, the total voltage insulation detection module 520 mainly sets a plurality of groups of monitoring points in the whole main loop, and detects and analyzes the plurality of groups of monitoring points, so that the working voltage and the working insulation can be directly and effectively known. It should be noted that, in the following description, the total voltage insulation detection module 520 may also use a special voltage sensor and insulation detection device to complete the voltage and insulation detection.

In some embodiments, the operation state detection unit further includes a temperature detection module 530 connected to the core controller 300. The temperature detection unit can detect the temperature of the battery pack 610, the connecting bar, the contactor and other devices in the whole battery system through the temperature detection unit, so that corresponding cooling treatment can be timely carried out when the temperature is abnormal, and accidents are avoided.

In some embodiments, the ground terminal of the temperature detection module 530 is connected to the negative terminal of the battery pack 610. The mode of cathode homotopic connection is adopted, the withstand voltage requirement of the temperature sensor when temperature detection is carried out on high-voltage components such as copper bars, relays and the like can be reduced, and the cost caused by sensor selection is effectively reduced.

In some embodiments, the communication module 400 is a daisy chain communication module, and can be connected to any node of the daisy chain in the entire battery management unit system through the daisy chain communication module to implement communication, and meanwhile, when there is no daisy signal, the communication module can automatically enter a sleep state to reduce power consumption.

In some embodiments, the core controller 300 may employ a chip with an ADC interface, so as to directly receive the signal collected by the operation status detection unit, or may employ a combination of a chip without an ADC interface and an ADC module instead.

In some embodiments, the high side driving module 220 and the bottom side driving module are driving circuits constructed based on MOSFETs, so that on-off control and driving can be realized. In some embodiments, the high side driving module 220 and the bottom side driving module may be replaced by MOS transistors and triodes.

Referring to fig. 2, fig. 2 is a flowchart of a control method of a battery pack detection system according to an embodiment of the present invention, which is applied to the battery pack detection system, the control method includes but is not limited to steps S100 to S200,

step S100, acquiring running state data, wherein the running state data at least comprises working current and working voltage of the battery pack 610 collected by the running state detection unit;

in step S200, if the operating state data represents a state fault of the battery pack 610, the fusing control module 200 is controlled to drive the fuse 620 to fuse, so that the battery pack 610 stops outputting.

The operation state data is acquired by the operation state detection unit, the operation state of the battery pack 610 can be directly and effectively reflected, the core controller 300 can directly and effectively judge whether the battery pack 610 has a fault or not by using the operation state data after receiving the operation state data, once the fault occurs, the fusing control module 200 can be controlled to drive the fuse 620 to complete fusing, the battery pack 610 is disconnected from being output externally, and the occurrence of real transmission is avoided.

The battery pack detection system provided by the embodiment of the invention can actively control the fusing control module 200 to drive the fuse 620 to fuse and disconnect the output of the battery pack 610 when the battery pack 610 has a state fault by detecting the operating state data such as the working current and the working voltage of the battery pack 610 in real time, so that the safety of vehicles and personnel is guaranteed. In addition, the control method of the battery pack detection system provided by the embodiment of the invention is realized based on the battery pack detection system, so that the control method has the beneficial effects brought by the battery pack detection system.

In some embodiments, the control method further includes, but is not limited to,

if the running state data represents that the state of the battery pack 610 is normal, the fusing control module 200 is controlled to perform self-checking so as to obtain fault detection information of the fusing control module 200.

When the battery pack 610 is in a normal state, the fuse 620 does not need to be driven to complete fusing at this time, but in order to ensure that the fuse 620 is always in an available state, the fusing control module 200 can continuously perform self-checking, corresponding fault detection information is obtained, whether a fault occurs in the fusing control module 200 can be further judged according to the fault detection information, when the fault occurs is confirmed, a fault signal can be sent to the battery management unit through the communication module 400, a vehicle user is informed through the battery management unit, and the situation that a faulty vehicle is driven to go on the road is avoided.

In some embodiments, referring to fig. 1, the fuse control module 200 includes a switch circuit 210, a high side driving module 220, a first resistor R2, and a low side driving module 230; the switch circuit 210 has a switch input terminal, a switch output terminal, and a first controlled terminal, the first controlled terminal is connected to the core controller 300, and the switch input terminal is connected to the output terminal of the BUCK power supply 100; the high-side driving module 220 has a high-side input end, a high-side output end and a second controlled end, the second controlled end is connected with the core controller 300, the high-side input end is connected with the switch output end, the high-side output end is connected with one end of a coil of the fuse 620, and a first resistor R3 is connected between the high-side input end and the high-side output end; the first resistor R2 is connected between the high-side input end and the output end of the BUCK power supply 100; the low-side driving module 230 has a low-side input end, a low-side output end and a third controlled end, the third controlled end is connected with the core controller 300, the low-side input end is connected with the other end of the coil of the fuse 620, the low-side output end is connected with the ground wire, and a third resistor R4 is connected between the low-side input end and the low-side output end;

referring to fig. 3, the fuse control module 200 is controlled to perform a self-test, including but not limited to steps S310 to S350,

step S310, controlling the switching circuit 210, the high-side driving module 220, and the low-side driving module 230 to be turned off, and obtaining a first voltage sampling value output by the low-side input terminal;

step S320, controlling the switch circuit 210 to be closed, controlling the high-side driving module 220 and the low-side driving module 230 to be disconnected, and obtaining a second voltage sampling value output by the low-side input end;

step S330, controlling the high-side driving module 220 to be turned on, and controlling the switching circuit 210 and the low-side driving module 230 to be turned off, so as to obtain a third voltage sampling value output by the low-side input terminal;

step S340, controlling the low-side driving module 230 to be closed, and controlling the switching circuit 210 and the high-side driving module 220 to be disconnected, so as to obtain a fourth voltage sampling value output by the low-side input end;

step S350, determining fault detection information according to the first voltage sampling value, the second voltage sampling value, the third voltage sampling value and the fourth voltage sampling value.

The function of the fusing control module 200 is mainly implemented based on the switching circuit 210, the high-side driving module 220, and the low-side driving module 230, so that it is only necessary to determine whether the states of the switching circuit 210, the high-side driving module 220, the low-side driving module 230, and the coil of the fuse 620 are normal, and it can be determined whether the fusing control module 200 can work normally. Here, a brief description is given of a principle of how the fuse control module 200 performs self-test, where the resistance of the coil of the fuse 620 in a normal state is different from the resistance of the coil in an abnormal state, and after the switching circuit 210, the high-side driving module 220, and the low-side driving module 230 are respectively turned on, the connection situations of the first resistor R3, the first resistor R2, the third resistor R4, and the coil are also different, so that a voltage output by the low-side input end of the low-side driving module 230 may be changed, and whether the coil of the switching circuit 210, the high-side driving module 220, the low-side driving module 230, and the fuse 620 has a fault or not may be effectively determined by using this principle.

When the self-test is required, step S310 is executed first, the switch circuit 210, the high-side driving module 220, and the low-side driving module 230 are controlled to be closed, at this time, the first resistor R3, the first resistor R2, the third resistor R4, and the coil are all connected in series, and because the first resistor R3, the first resistor R2, and the third resistor R4 are unchanged, as long as the coil is abnormal, the resistance value of the coil will be changed, thereby causing the voltage at the two ends of the third resistor R4 to be changed, otherwise, if the coil is normal, the voltage value of the third resistor R4 will be kept unchanged at this time, and thus, whether the coil is abnormal is determined. After step S310 is finished, the first voltage sample value is obtained.

After the coil detection is completed, step S320 is executed, and at this time, only the first resistor R2, the third resistor R4 and the coil are connected in series, and if the switching circuit 210 fails to turn off, the series structure formed by the first resistor R2, the third resistor R4 and the coil cannot be obtained, so that the voltages at the two ends of the third resistor R4 are different inevitably in both cases of success and failure of the turning off, and it can be determined whether the switching circuit 210 has a fault. After step S320, a second voltage sample is obtained.

Similarly, when step S330 is executed, only the first resistor R3, the third resistor R4 and the coil are connected in series, and if the turn-off fails, the series structure formed by the first resistor R3, the third resistor R4 and the coil connected in series cannot be obtained, so that the voltages at two ends of the third resistor R4 are different inevitably under two conditions of the turn-off success and the turn-off failure, and it can be determined whether the high-side driving module 220 has a fault. After step S330, a third voltage sample is obtained.

Similarly, when step S340 is executed, the third resistor R4 is directly shorted, the voltage detected by the core controller 300 is zero, and if the turn-off fails, the third resistor R4 will not be shorted, so that the voltages at two ends of the third resistor R4 will be different inevitably under two conditions of success and failure of the turn-off, and thus it can be determined whether the low-side driver module 230 has a fault. After step S340, a fourth voltage sample is obtained.

Finally, the first voltage sampling value, the second voltage sampling value, the third voltage sampling value and the fourth voltage sampling value can be used for determining whether the battery pack 610 has a fault or not and generating corresponding fault detection information, and the core controller 300 can complete subsequent control according to the fault detection information.

It should be noted that, when the switching circuit 210, the high-side driving module 220, and the low-side driving module 230 are performed, if the coil of the fuse 620 fails, the corresponding voltage sampling value will also change, and therefore, any one of step S310 to step S340 can be used to perform coil detection in principle.

It should be further noted that, if it is determined that the fault detection information indicates that a fault occurs, the fuse 620 may be blown by controlling the switching circuit 210, the high-side driving module 220, and the low-side driving module 230 to be closed.

In some embodiments, referring to fig. 1, the switching circuit 210 includes a MOS transistor Q1, a transistor Q2;

a source electrode of the MOS transistor Q1 is connected with the output end of the BUCK power supply 100, a drain electrode of the MOS transistor Q1 is connected with the high-side input end, and a fourth resistor R5 is connected between the grid electrode and the source electrode;

a fifth resistor R6 is connected between the collector of the triode Q2 and the grid of the MOS tube Q1, the collector is connected with the ground wire, A capacitor C1 is connected between the collector and the output end of the BUCK power supply 100, and the base is connected with the core controller 300.

The on-off state of the MOS tube Q1 can be controlled by controlling the on-off state of the triode Q2, at the moment, the source electrode of the MOS tube Q1 is used as the switch input end of the switch circuit 210, the source electrode is used as the switch output end, and the base electrode of the triode Q2 is used as the first controlled end, so that the fuse 620 can be driven by matching with the high-side driving module 220 and the low-side driving module 230, and the detection work of the fusing control module 200 is completed.

Furthermore, an embodiment of the present invention also provides a computer-readable storage medium, which stores computer-executable instructions, which, when executed by a processor or a controller, may cause the processor to execute the control method of the battery pack detection system in the foregoing embodiment.

It will be understood by those of ordinary skill in the art that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, or suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media or non-transitory media and communication media or transitory media. The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A battery pack inspection system, comprising:

and the communication module is connected with the core controller.

2. The battery pack detection system of claim 1, wherein the fusing control module comprises:

3. The battery pack detection system of claim 2, wherein the switching circuit comprises:

4. The battery pack detection system according to claim 1, wherein the operation state detection unit includes:

the current detection module is connected with the core controller and used for detecting the working current of the battery pack;

and the total pressure insulation detection module is connected with the core controller and used for detecting the working voltage of the battery pack and the working insulation of the battery pack.

5. The battery pack detection system of claim 1, wherein the operating condition detection unit further comprises a temperature detection module connected to the core controller.

6. The battery pack detection system according to claim 5, wherein a ground terminal of the temperature detection module is connected to a negative electrode of the battery pack at the same potential.

7. A control method of a battery pack detection system, which is applied to the battery pack detection system according to any one of claims 1 to 6, the control method comprising:

8. The control method of a battery pack detection system according to claim 7, further comprising:

9. The control method of the battery pack detection system according to claim 7, wherein the fusing control module comprises a switching circuit, a high-side driving module, a second resistor, and a low-side driving module; the switch circuit is provided with a switch input end, a switch output end and a first controlled end, the first controlled end is connected with the core controller, and the switch input end is connected with the output end of the BUCK power supply; the high-side driving module is provided with a high-side input end, a high-side output end and a second controlled end, the second controlled end is connected with the core controller, the high-side input end is connected with the switch output end, the high-side output end is connected with one end of a coil of the fuse, and a first resistor is connected between the high-side input end and the high-side output end; the second resistor is connected between the high-side input end and the output end of the BUCK power supply; the low-side driving module is provided with a low-side input end, a low-side output end and a third controlled end, the third controlled end is connected with the core controller, the low-side input end is connected with the other end of the coil of the fuse, the low-side output end is connected with a ground wire, and a third resistor is connected between the low-side input end and the low-side output end;

the controlling the fusing control module to perform self-checking includes:

10. A computer-readable storage medium storing computer-executable instructions for performing the method of controlling the battery pack inspection system according to any one of claims 7 to 9.