CN116540150A - High-voltage interlocking detection system and detection method - Google Patents
High-voltage interlocking detection system and detection method Download PDFInfo
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Abstract
The application relates to the technical field of high-voltage safety, in particular to a high-voltage interlocking detection system and a detection method. The high-voltage interlocking detection system comprises a plurality of battery modules, a plurality of MSD modules, a plurality of slave control detection modules and a master control module. The battery modules are sequentially connected in series, and each battery module is provided with a high-voltage loop. The MSD modules are in one-to-one correspondence with the battery modules, and each MSD module is connected in series with the high-voltage loop of the corresponding battery module. The slave control detection modules are in one-to-one correspondence with the MSD modules, and each slave control detection module is electrically connected with the corresponding MSD module and changes the level state of the slave control detection module according to the disconnection or connection state of the corresponding MSD module. The plurality of slave control detection modules are electrically connected with the master control module, and the master control module is configured to receive the information of the self-level state transmitted by the plurality of slave control detection modules and determine that the plurality of MSD modules are in a disconnected or connected state according to the information. And the main control module determines a fault point according to the level state of the slave control detection module.
Description
Technical Field
The application relates to the technical field of high-voltage safety, in particular to a high-voltage interlocking detection system and a detection method.
Background
With the development of batteries, the capacity, safety, health status and endurance of battery modules are becoming important concerns. An MSD (Manual Service Disconnect, manual maintenance switch) module is required to be provided in the high-voltage circuit of the battery module to ensure the safety of the battery module.
However, the disconnection or connection state of the MSD module cannot be timely obtained at the present stage, when more battery modules are provided, the battery modules need to be detected one by one manually, so that fault points cannot be positioned quickly, further, the detection period is longer, and the detection cost is higher.
Disclosure of Invention
The application discloses a high-voltage interlocking detection system and a detection method, which can rapidly locate fault points, shorten detection period and reduce detection cost.
To achieve the above object, in a first aspect, the present application discloses a high voltage interlock detection system, comprising:
the battery modules are sequentially connected in series, and each battery module is provided with a high-voltage loop;
the MSD modules are in one-to-one correspondence with the battery modules, and each MSD module is connected in series with the high-voltage loop of the corresponding battery module;
the slave control detection modules are in one-to-one correspondence with the MSD modules, and each slave control detection module is electrically connected with the corresponding MSD module and changes the level state of the slave control detection module according to the state that the corresponding MSD module is in disconnection or connection; and
the master control module is electrically connected with the slave control detection modules, and is configured to receive the information of the self-level states transmitted by the slave control detection modules and determine that the MSD modules are in the disconnected or connected state according to the information.
Because the plurality of slave control detection modules are in one-to-one correspondence with the plurality of MSD modules, and the plurality of MSD modules are in one-to-one correspondence with the plurality of battery modules, the plurality of slave control detection modules are in one-to-one correspondence with the plurality of battery modules. The slave control detection module judges that the MSD module is in an abnormal state or a normal state by detecting that the corresponding MSD module is in an off state or an on state. When one or any several MSD modules fail, that is, one or any several MSD modules are in a disconnected state, and the corresponding slave control detection module detects that the MSD modules are in the disconnected state, so that the position of the failure point is rapidly determined.
Optionally, the I/O port of each slave detection module is electrically connected to the high-voltage interlocking loop of the MSD, when the I/O port of the slave detection module is in a high-level state, the master control module determines that the high-voltage interlocking loop of the MSD is disconnected, the MSD module is in a disconnected state, and when the I/O port of the slave detection module is in a low-level state, the master control module determines that the high-voltage interlocking loop of the MSD is connected, and the MSD module is in a connected state.
The high-voltage interlocking loop of the MSD module is electrically connected with the I/O port of the slave control detection module, so that a complex external circuit can be simplified. After the I/O port of the slave control detection module is electrically connected with the high-voltage interlocking loop of the MSD module, the I/O port of the slave control detection module is in a high-level state or a low-level state and corresponds to the high-voltage interlocking loop of the MSD module in an off state or a on state. The high-voltage interlocking loop of the MSD module can be judged to be in an off state or in a on state by detecting whether the I/O port of the slave control detection module is in a high level state or in a low level state, so that whether the MSD module is in an abnormal state or in a normal state is confirmed.
Optionally, the MSD module includes:
a socket having a first high voltage interlock terminal group electrically connected to an I/O port of the slave detection module, and the first high voltage interlock terminal group being grounded; and
a plug having a second high voltage interlock terminal set;
when the second high-voltage interlocking terminal group is separated from the first high-voltage interlocking terminal group, the I/O port of the slave control detection module is in the high-level state, the high-voltage interlocking loop is disconnected, and when the second high-voltage interlocking terminal group is connected with the first high-voltage interlocking terminal group, the I/O port of the slave control detection module is in the low-level state, and the high-voltage interlocking loop is communicated.
When the plug of the MSD module is separated from the socket, the MSD module is in a disconnected state, and when the plug of the MSD module is inserted into the socket, the MSD module is in a connected state. When the MSD module is in an abnormal state and the plug is separated from the socket, the first high-voltage interlocking terminal group of the socket is separated from the second high-voltage interlocking terminal group of the plug, the high-voltage interlocking circuit of the MSD module is in a disconnected state, and the I/O port of the corresponding slave control detection module is in a high-level state. When the MSD module is in a normal state and the plug is inserted into the socket, the socket is connected with the second high-voltage interlocking terminal group of the plug, the high-voltage interlocking circuit of the MSD module is in a communication state, and the I/O port of the corresponding slave control detection module is in a low-level state.
Optionally, the first high-voltage interlocking terminal group includes a first high-voltage interlocking terminal and a second high-voltage interlocking terminal which are separately arranged, the first high-voltage interlocking terminal is electrically connected to the I/O port of the slave control detection module, and the second high-voltage interlocking terminal is grounded;
the high voltage interlock loop is disconnected when the second high voltage interlock terminal group is separated from the first high voltage interlock terminal or the second high voltage interlock terminal, and the high voltage interlock loop is communicated when the second high voltage interlock terminal group is connected with the first high voltage interlock terminal and the second high voltage interlock terminal.
When the plug is inserted into the socket, the second high-voltage interlocking terminal group is connected with the first high-voltage interlocking terminal and the second high-voltage interlocking terminal at the same time, so that the high-voltage interlocking circuits are communicated. Because the second high-voltage interlocking terminal is grounded, when the high-voltage interlocking circuit is communicated, the I/O port of the slave control detection module electrically connected with the first high-voltage interlocking terminal is in a low-level state, and when the high-voltage interlocking circuit is disconnected, the I/O port of the slave control detection module is in a suspended state, and then the I/O port of the slave control detection module is in a high-level state.
Optionally, the system further comprises an electricity utilization module, wherein a plurality of battery modules are connected in series in sequence and then are electrically connected with the electricity utilization module, and the master control module controls the plurality of battery modules to power off or power on the electricity utilization module according to the received information that the MSD module is in an off or on state.
When the slave control detection module detects that the corresponding MSD module is in the disconnection state, the slave control detection module transmits information to the main control module, and the main control module cuts off the power of the battery module after obtaining the information that the MSD module is in the disconnection state, so that the damage to maintenance personnel is avoided. Meanwhile, the main control module can determine the position of the MSD module in the disconnection state from the information transmitted by the control detection module, namely, the position of the fault point is accurately determined, so that the maintenance period is shortened.
Optionally, the system further comprises an address network bus, and each control detection module is electrically connected with the main control module through the address network bus.
Each slave control detection module is electrically connected with the main control module through the address network bus, so that the data transmission speed between the slave control detection module and the main control module can be improved, and meanwhile, the reliability and stability of data transmission can be ensured.
In a second aspect, the present application further discloses a high voltage interlocking detection method, where the main control module of the high voltage interlocking detection system in the first aspect performs the following steps, including:
acquiring the level state of an I/O port of each slave control detection module, wherein the level state comprises a high level state and a low level state;
confirming the disconnection or connection state of the corresponding MSD module according to the level state;
and confirming a fault point according to the disconnection or connection state of the MSD module.
Optionally, the determining the disconnection or connection state of the corresponding MSD module according to the level state includes:
if the level state of the I/O port of the slave control detection module is a high level state, confirming that a high-voltage interlocking loop of the MSD module is disconnected and the MSD module is in a disconnected state;
and if the level state of the I/O port of the slave control detection module is a low level state, confirming that the high-voltage interlocking loop of the MSD module is communicated and the MSD module is in a communicated state.
Optionally, if the level state of the I/O port of the slave detection module is a high level state, after confirming that the high-voltage interlocking loop of the MSD module is disconnected and the MSD module is in the disconnected state, the method further includes:
and controlling any battery module to be powered off.
Optionally, the determining the fault point according to the disconnection or connection state of the MSD module includes:
acquiring address information of the MSD module in a disconnected state;
and confirming the fault point according to the address information.
Compared with the prior art, the beneficial effect of this application lies in:
according to the high-voltage interlocking detection system and the detection method, the plurality of slave control detection modules are in one-to-one correspondence with the plurality of MSD modules, and the plurality of MSD modules are in one-to-one correspondence with the plurality of battery modules, so that the plurality of slave control detection modules are in one-to-one correspondence with the plurality of battery modules, the slave control detection modules change the self level state by detecting that the corresponding MSD modules are in the disconnection state or the connection state, and the master control module judges that the MSD modules are in the abnormal state or the normal state according to the level state information of the slave control detection modules, so that the fault point is determined.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a high voltage interlock detection system provided in a first embodiment of the present application;
FIG. 2 is a schematic diagram of an MSD module provided in an embodiment of the present application;
FIG. 3 is a schematic diagram of a high voltage interlock detection system provided in a second embodiment of the present application;
FIG. 4 is a flow chart of a first embodiment of the high voltage interlock detection method provided herein;
FIG. 5 is a flow chart of a second embodiment of a high voltage interlock detection method provided herein;
FIG. 6 is a flow chart of a third embodiment of a high voltage interlock detection method provided herein;
fig. 7 is a flowchart of a fourth embodiment of the high voltage interlock detection method provided herein.
The main reference numerals illustrate:
1-a high voltage interlock detection system;
11-a battery module;
a 12-MSD module;
121-a socket; 1211-a first high voltage interlock terminal set; 1212-a first high voltage interlock terminal; 1213-a second high voltage interlock terminal; 122-plug; 1221-a second high voltage interlock terminal set; 1222-a third high voltage interlock terminal; 1223-fourth high voltage interlock terminals;
13-a slave detection module;
14-a main control module;
15-an address network bus;
16-electricity module.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In this application, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In addition, the terms "first," "second," etc. are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of indicated devices, elements, or components. Unless otherwise indicated, the meaning of "a plurality" is two or more.
The technical scheme of the present application will be further described with reference to specific embodiments and drawings.
Referring to fig. 1, an embodiment of the present application discloses a high voltage interlock detection system 1, which includes a plurality of battery modules 11, a plurality of MSD modules 12, a plurality of slave detection modules 13, and a master control module 14. The plurality of battery modules 11 are connected in series in sequence, and each battery module 11 has a high-voltage circuit. The plurality of MSD modules 12 are in one-to-one correspondence with the plurality of battery modules 11, and each MSD module 12 is connected in series with the high-voltage circuit of the corresponding battery module 11. The plurality of slave control detection modules 13 are in one-to-one correspondence with the plurality of MSD modules 12, and each slave control detection module 13 is electrically connected to the corresponding MSD module 12 and changes its own level state according to whether the corresponding MSD module 12 is in an off or on state. The plurality of slave detection modules 13 are electrically connected to the master control module 14, and the master control module 14 is configured to receive the information of the self-level state transmitted by the plurality of slave detection modules 13 and determine that the plurality of MSD modules 12 are in the disconnected or connected state according to the information.
In the power supply system, since the motor generally requires a high voltage to exert the maximum power and the voltage provided by the single battery module 11 is limited, it is necessary to connect a plurality of battery modules 11 in series to increase the total voltage to drive the motor. In addition, the new energy automobile needs enough electric energy to travel a longer distance in a single travel, and the electric energy stored in the single battery module 11 is limited, so that a plurality of battery modules 11 need to be connected in series to increase the stored electric quantity of the power supply system, thereby improving the endurance mileage of the new energy automobile.
The single battery module 11 may include a plurality of strings of cells connected in series to form a high voltage circuit. For example, the battery module 11 may include 16 strings of cells connected in series to form a high voltage circuit. Of course, the number of the battery cells connected in series may be adjusted according to the actual requirement of the battery module 11, which is not limited herein.
It should be noted that, in order to reduce the total voltage and cut off the high-voltage circuit when the battery module 11 is maintained or transported, the MSD module 12 may be connected in series between the battery cells of the battery module 11, that is, the MSD module 12 and the high-voltage circuit of the battery module 11 may be connected in series. The MSD module 12 has two states of disconnection or connection, and when the MSD module 12 is in the connection state, the high-voltage circuit of the battery module 11 is in the connection state; when the MSD module 12 is in the off state, the high voltage circuit of the battery module 11 is in the off state, so that the safety of the battery module 11 and the personal safety of the related technician can be ensured when the battery module 11 is maintained or transported. For example, the 16 strings of cells included in the battery module 11 may be divided into a first cell group and a second cell group, where the first cell group and the second cell group each include 8 strings of cells connected in series, one end of the first cell group is used as the positive electrode of the battery module 11, one end of the second cell group is used as the negative electrode of the battery module 11, and the other ends of the first cell group and the second cell group are both electrically connected to the MSD module 12. When the MSD module 12 is in the connected state, the first battery cell group is connected with the second battery cell group, that is, the high-voltage circuit of the battery module 11 is connected, and when the MSD module is in the disconnected state, the first battery cell group is disconnected from the second battery cell group, that is, the high-voltage circuit of the battery module 11 is disconnected.
Since the plurality of slave detection modules 13 are in one-to-one correspondence with the plurality of MSD modules 12 and the plurality of MSD modules 12 are in one-to-one correspondence with the plurality of battery modules 11, the plurality of slave detection modules 13 are in one-to-one correspondence with the plurality of battery modules 11.
The plurality of slave detection modules 13 detect that the corresponding MSD module 12 is in the off or on state, and the level state thereof corresponds to the state of detecting that the corresponding MSD module 12 is in the off or on state, in other words, the level state of the plurality of slave detection modules 13 changes according to the state of detecting that the corresponding MSD module 12 is in the off or on state, meanwhile, the plurality of slave detection modules 13 transmit the information of the level state thereof to the master control module 14, and the master control module 14 can determine that each MSD module 12 is in the off or on state according to the information of the level state of the plurality of slave detection modules 13, that is, can determine that each MSD module 12 is in the abnormal state or the normal state, so that the position of the MSD module 12 in the off state can be accurately acquired, that is, the position of the MSD module 12 in the abnormal state can be accurately acquired.
Illustratively, each slave detection module 13 has an IP address, and the IP address of each slave detection module 13 is different, and in short, the IP address of each slave detection module 13 has a uniqueness. The slave detection module 13 transmits the IP address of itself to the master control module 14 in addition to the information corresponding to the MSD module 12 in the disconnected or connected state to the master control module 14, so as to obtain the information of all the MSD modules 12 in the disconnected or connected state and the position. When one or more of the MSD modules 12 fail, that is, one or more of the MSD modules 12 are in the off state, the corresponding slave detection module 13 detects that the MSD module 12 is in the off state, and the master control module 14 can accurately position the position of the MSD module 12 in the off state, that is, accurately position the position of the failure point according to the IP address of the slave detection module 13 corresponding to the MSD module 12 in the off state, thereby shortening the maintenance period.
In addition, it can be understood that the slave control detection module 13 can detect not only the disconnection or connection state of the corresponding MSD module 12, but also related data such as current, voltage, temperature, etc. of the corresponding battery module 11, and transmit the related data to the master control module 14, and the master control module 14 can determine whether the battery module 11 is in a normal state or an abnormal state according to the related data, and can accurately position the position of the battery module 11 in the abnormal state.
The slave detection module 13 may be a battery management unit (Battery management unit, BMU), the master control module 14 may be a battery control unit (Battery Control Unit, BCU), the battery control unit and the battery management unit may be a master board and a slave board of the battery management system (Battery Management System, BMS), and the master board is electrically connected to the slave board through a circuit, so that the master control module 14 may collect information of a level state of the slave detection module 13.
In some embodiments, the I/O port (input/output interface) of each slave detection module 13 is electrically connected to the high voltage interlock loop of the MSD, when the I/O port of the slave detection module 13 is in a high level state, the master module determines that the high voltage interlock loop of the MSD is open, the MSD module 12 is in an open state, and when the I/O port of the slave detection module 13 is in a low level state, the master module determines that the high voltage interlock loop of the MSD is connected, the MSD module 12 is in a connected state.
The high voltage interlock loop of the MSD module 12 is electrically connected with the I/O port of the slave detection module 13, which can simplify complex external circuits. It should be noted that, in order to integrate the detection function of the slave detection module 13, the slave detection module 13 includes a slave circuit board, and the slave circuit board has a plurality of I/O ports, wherein a part of the I/O ports are electrically connected with the battery module 11, so as to detect related data such as current, voltage, and temperature of the battery module 11. It will be appreciated that the slave circuit board also has an idle I/O port, and the idle I/O port of the slave circuit board is electrically connected with the high-voltage interlock loop of the MSD module 12, so that an external circuit of the MSD high-voltage interlock loop is not required, thereby achieving the purpose of simplifying a complex external circuit.
After the I/O port of the slave detection module 13 is electrically connected with the high-voltage interlocking loop of the MSD module 12, the I/O port of the slave detection module 13 is in a high-level state or a low-level state and corresponds to the high-voltage interlocking loop of the MSD module 12 in an off state or an on state. Specifically, when the MSD module 12 is in the off state, the high-voltage interlocking loop of the MSD module 12 is disconnected, and the I/O port of the slave detection module 13 is correspondingly in the high-level state; when the MSD module 12 is in the connected state, the high-voltage interlocking loop of the MSD module 12 is connected, and the I/O port of the slave detection module 13 is correspondingly in the low-level state. That is, by detecting whether the I/O port of the slave detection module 13 is in the high level state or the low level state, it is possible to determine whether the high-voltage interlock loop of the MSD module 12 is in the off state or the on state, so as to confirm whether the MSD module 12 is in the abnormal state or the normal state.
It can be understood that the slave detection module 13 transmits information that the I/O port for connecting the high-voltage interlocking loop is in a high-level state or a low-level state to the master control module 14, and the master control module 14 determines that the high-voltage interlocking loop corresponding to the MSD module 12 is in an off state or an on state, that is, the corresponding MSD module 12 is in an off state or an on state, according to the received information that the I/O port for connecting the high-voltage interlocking loop is in the high-level state or the low-level state.
In other embodiments, the slave detection module 13 may also directly detect that the high-voltage interlock circuit of the MSD module 12 is connected or disconnected, so as to determine that the MSD module 12 is in the connected state or the disconnected state.
Referring to fig. 2, in some embodiments, the MSD module 12 includes a socket 121 and a plug 122, the socket 121 has a first high voltage interlock terminal set 1211, the first high voltage interlock terminal set 1211 is electrically connected to the I/O port of the slave detection module 13, and the first high voltage interlock terminal set 1211 is grounded; the plug 122 has a second high voltage interlock terminal group 1221. When the second high-voltage interlock terminal group 1221 is separated from the first high-voltage interlock terminal group 1211, the I/O port of the slave detection module 13 is in a high-level state, the high-voltage interlock circuit is disconnected, and when the second high-voltage interlock terminal group 1221 is connected to the first high-voltage interlock terminal group 1211, the I/O port of the slave detection module 13 is in a low-level state, and the high-voltage interlock circuit is communicated.
It will be appreciated that when the plug 122 of the MSD module 12 is separated from the receptacle 121, the MSD module 12 is in an off state, and when the plug 122 of the MSD module 12 is inserted into the receptacle 121, the MSD module 12 is in an on state.
Specifically, when the MSD module 12 is in an abnormal state, and the plug 122 is separated from the socket 121, the first high voltage interlock terminal group 1211 of the socket 121 is separated from the second high voltage interlock terminal group 1221 of the plug 122, and the high voltage interlock circuit of the MSD module 12 is in an off state, and the I/O port of the corresponding slave detection module 13 is in a high level state. When the MSD module 12 is in the normal state, the plug 122 is inserted into the socket 121, the first high-voltage interlock terminal group 1211 of the socket 121 is connected with the second high-voltage interlock terminal group 1221 of the plug 122, the high-voltage interlock circuit of the MSD module 12 is in the connected state, and the I/O port of the corresponding slave detection module 13 is in the low-level state.
In addition, in order to realize that the MSD module 12 is connected in series to the high voltage circuit of the corresponding battery module 11, the MSD module 12 may be in an off state or an on state, and the MSD module 12 may include a high voltage terminal group connected in series to the high voltage circuit of the battery module 11. Specifically, the socket 121 of the MSD module 12 has a first high voltage terminal set connected in series with the first cell set, and the plug 122 of the MSD module 12 has a second high voltage terminal set for mating with the first high voltage terminal set, the second high voltage terminal set being connected in series with the second cell set. When the plug 122 is separated from the socket 121, the first high voltage terminal group is separated from the second high voltage terminal group, so that the first battery cell group is separated from the second battery cell group, thereby making the high voltage circuit of the battery module 11 in an off state. When the plug 122 is inserted into the socket 121, the first high voltage terminal group is connected with the second high voltage terminal group, so that the second battery cell group communicates with the second battery cell group, thereby putting the high voltage circuit of the battery module 11 in a communication state.
In summary, when the I/O port of one or any several slave detection modules 13 is at a high level, the high-voltage interlock loop of the corresponding MSD module 12 is in an open state, that is, the MSD module 12 fails.
In other embodiments, the second high voltage interlock terminal set 1221 is electrically connected to the I/O port of the slave detection module 13.
With continued reference to fig. 2, in some more specific embodiments, the first high voltage interlock terminal set 1211 includes a first high voltage interlock terminal 1212 and a second high voltage interlock terminal 1213 that are disposed apart, the first high voltage interlock terminal 1212 being electrically connected to the I/O port of the slave detection module 13, the second high voltage interlock terminal 1213 being grounded;
when the second high-voltage interlock terminal group 1221 is separated from the first high-voltage interlock terminal 1212 or the second high-voltage interlock terminal 1213, the high-voltage interlock circuit is disconnected, and when the second high-voltage interlock terminal group 1221 is connected to the first high-voltage interlock terminal 1212 and the second high-voltage interlock terminal 1213, the high-voltage interlock circuit is communicated.
It will be appreciated that when the plug 122 is inserted into the receptacle 121, the second high voltage interlock terminal group 1221 is simultaneously connected with the first high voltage interlock terminal 1212 and the second high voltage interlock terminal 1213, thereby allowing the high voltage interlock circuit to communicate. Since the second high voltage interlock terminal 1213 is grounded, when the high voltage interlock circuit is connected, the I/O port of the slave detection module 13 electrically connected to the first high voltage interlock terminal 1212 is in a low level state, and when the high voltage interlock circuit is disconnected, the I/O port of the slave detection module 13 is in a suspended state, and the I/O port of the slave detection module 13 is in a high level state.
Specifically, the second high-voltage interlock terminal group 1221 includes a third high-voltage interlock terminal 1222 and a fourth high-voltage interlock terminal 1223, the third high-voltage interlock terminal 1222 is connected to the fourth high-voltage interlock terminal 1223, and the third high-voltage interlock terminal 1222 is used to connect to the first high-voltage interlock terminal 1212, and the fourth high-voltage interlock terminal 1223 is used to connect to the second high-voltage interlock terminal 1213. It will be appreciated that when the first high voltage interlock terminal 1212 is connected to the third high voltage interlock terminal 1222 and the second high voltage interlock terminal 1213 is connected to the fourth high voltage interlock terminal 1223, the high voltage interlock circuit communicates; when the first high voltage interlock terminal 1212 is disconnected from the third high voltage interlock terminal 1222 or the second high voltage interlock terminal 1213 is disconnected from the fourth high voltage interlock terminal 1223, the high voltage interlock loop is opened.
In other more specific embodiments, the second high voltage interlock terminal group 1221 is grounded.
Referring to fig. 3, in some embodiments, the battery module system further includes an electricity consumption module 16, and the plurality of battery modules 11 are electrically connected to the electricity consumption module 16 after being serially connected in sequence, and the main control module 14 controls the plurality of battery modules 11 to power off or power on the electricity consumption module 16 according to the received information that the MSD module 12 is in the off or on state.
For example, the power module 16 may include various functional sensors applied to the high voltage interlock detection system 1, and of course, the power module 16 may also include other functional components that need to be powered by the battery module 11, which is not limited herein.
The plurality of battery modules 11 are electrically connected with the power utilization module 16 after being connected in series, and when the plurality of battery modules 11 are powered on the power utilization module 16, the plurality of battery modules 11 provide electric energy for the power utilization module 16 so that the power utilization module 16 can execute corresponding functions; when the plurality of battery modules 11 power off the power utilization module 16, the plurality of battery modules 11 stop supplying power to the power utilization module 16, so that the power utilization module 16 is in a stopped state.
When the slave control detection module 13 detects that the corresponding MSD module 12 is in the disconnection state, the slave control detection module 13 transmits information to the main control module 14, and after the main control module 14 acquires the information that the MSD module 12 is in the disconnection state, the plurality of battery modules 11 are controlled to be powered off the power utilization module 16, so that damage to maintenance personnel is avoided.
In other embodiments, the master control module 14 may also control the corresponding battery module 11 to power off or power on the power utilization module 16 through the slave control detection module 13.
With continued reference to fig. 3, in some more specific embodiments, an address network bus 15 is further included, and each control detection module is electrically connected to the main control module 14 through the address network bus 15.
Each slave control detection module 13 is electrically connected with the master control module 14 through a CAN (Controller Area Network, control local area network) bus, so that the data transmission speed between the slave control detection module 13 and the master control module 14 CAN be increased, and meanwhile, the reliability and stability of data transmission CAN be ensured.
In other more specific embodiments, the slave detection module 13 may also transmit data to the master control module 14 by bluetooth or the like.
Referring to fig. 4, the embodiment of the present application further discloses a high voltage interlock detection method, wherein the main control module 14 of the high voltage interlock detection system 1 performs the following steps, including:
step 100: the level state of the I/O port of each slave detection module 13 is acquired, and the level state includes a high level state and a low level state.
Step 200: the disconnection or connection state of the corresponding MSD module 12 is confirmed according to the level state.
Step 300: the fault point is confirmed based on the disconnected or connected state of the MSD module 12.
The I/O port of the slave detection module 13 being in a high level state or a low level state corresponds to the MSD module 12 being in an off state or an on state. Specifically, when the I/O port connected to the MSD module 12 by the slave detection module 13 is in a high level state, the corresponding MSD module 12 is in an off state; when the I/O port of the slave detection module 13 connected to the MSD module 12 is in a low level state, the corresponding MSD module 12 is in a connected state.
Illustratively, when the I/O port of one or more slave detection modules 13 connected to the MSD module 12 is in a high level state and the I/O ports of the remaining slave detection modules 13 connected to the MSD module 12 are in a low level state, the MSD module 12 corresponding to the I/O port in the high level state is in a disconnected state, in other words, the MSD module 12 is in an abnormal state, that is, a failure point, and the MSD module 12 corresponding to the I/O port in the low level state is in a connected state, in other words, the MSD module 12 is in a normal state.
In summary, when the slave detection module 13 detects that the corresponding MSD module 12 is in the off state, it can be determined that the MSD module 12 is faulty or damaged, that is, the corresponding MSD module 12 is the fault point. Meanwhile, since the plurality of slave control detection modules 13 are in one-to-one correspondence with the corresponding MSD modules 12, the slave control detection modules 13 can accurately position the fault point when detecting that the corresponding MSD modules 12 are in the disconnection state.
Referring to fig. 5, in some embodiments, step 200 of confirming the disconnected or connected state of the corresponding MSD module 12 according to the level state includes the following steps:
step 210: if the level state of the I/O port of the slave detection module 13 is a high level state, it is confirmed that the high-voltage interlock circuit of the MSD module 12 is disconnected and the MSD module 12 is in the disconnected state.
Step 220: if the level state of the I/O port of the slave detection module 13 is a low level state, it is confirmed that the high-voltage interlock circuit of the MSD module 12 is connected and the MSD module 12 is in the connected state.
After the I/O port of the slave detection module 13 is electrically connected with the high-voltage interlocking loop of the MSD module 12, the I/O port of the slave detection module 13 is in a high-level state or a low-level state corresponding to the high-voltage interlocking loop of the MSD module 12 being in an off state or an on state, and the high-voltage interlocking loop of the MSD module 12 being in an off state or an on state corresponding to the MSD module 12 being in an off state or an on state. Specifically, when the I/O port of the slave detection module 13 is correspondingly in a high level state, the high-voltage interlocking loop of the corresponding MSD module 12 is disconnected, and the corresponding MSD module 12 is in a disconnected state, that is, a fault point; when the I/O port of the slave detection module 13 is correspondingly in a low level state, the high-voltage interlocking circuits of the corresponding MSD modules 12 are communicated, and the corresponding MSD modules 12 are in a communicated state.
The MSD module 12 is in the on state or the off state by detecting whether the I/O port of the slave control detection module 13 is in the high level state or the low level state, the detection mode is simple and effective, no complex equipment or tool support is needed in the detection process, the detection reliability is high, and the false detection condition can not occur. In addition, the state of the MSD module 12 is detected by fully utilizing the idle I/O port of the slave control detection module 13, the complex external circuit required by detecting the MSD module 12 is optimized, and the space is saved.
Referring to fig. 6, in some embodiments, step 210, if the level state of the I/O port of the slave detection module 13 is a high level state, further includes the following steps after confirming that the high voltage interlock loop of the MSD module 12 is open and the MSD module 12 is in the open state:
step 400: any one of the battery modules 11 is controlled to be powered off.
The plurality of slave control detection modules 13 detect that the corresponding MSD modules 12 are in a disconnected or connected state and transmit the disconnected or connected state to the master control module 14, and the master control module 14 judges whether the battery module 11 is powered off or powered on according to the states of all the MSD modules 12.
For example, when one or more slave control detection modules 13 detect that the corresponding MSD module 12 is in the off state, the slave control detection modules 13 transmit information to the master control module 14, and after the master control module 14 obtains the information that the MSD module 12 is in the off state, the battery module 11 corresponding to the MSD module 12 in the off state is powered off, so as to avoid injury to maintenance personnel.
In other embodiments, when the level state of the I/O port of the slave detection module 13 is a high level state, the master control module 14 controls all the battery modules 11 to be powered off after confirming that the high voltage interlock loop of the MSD module 12 is disconnected and the MSD module 12 is in the disconnected state.
Referring to FIG. 7, in some embodiments, step 300, determining a fault point based on the disconnected or connected state of the MSD module 12 includes the steps of:
step 310: address information of the MSD module 12 in the disconnected state is acquired.
Step 320: and confirming the fault point according to the address information.
The fault point is determined by acquiring address information of the MSD module 12 in the disconnected state. It will be appreciated that there are a variety of ways in which the address information may be represented by the MSD module 12.
Illustratively, the plurality of slave detection modules 13 are in one-to-one correspondence with the plurality of MSD modules 12, each slave detection module 13 has an IP address, and each slave detection module 13 has a different IP address, and in short, each slave detection module 13 has a unique IP address. When one or more slave control detection modules 13 are acquired to connect the information that the I/O ports of the corresponding MSD module 12 are in the high-level state, the IP address of the slave control detection module 13 is acquired at the same time, the power is cut off according to the information that at least one I/O port is in the high-level state, a power-on prohibition warning is generated, and meanwhile, the position of the MSD module 12 with the fault is determined according to the IP address of the slave control detection module 13 that the I/O port is in the high-level state, namely, the fault point is determined.
In other embodiments, since the plurality of MSD modules 12 are in one-to-one correspondence with the plurality of battery modules 11, the address information of each battery module 11 may also be acquired, thereby determining the address information of the MSD module 12.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A high voltage interlock detection system, comprising:
the battery modules are sequentially connected in series, and each battery module is provided with a high-voltage loop;
the MSD modules are in one-to-one correspondence with the battery modules, and each MSD module is connected in series with the high-voltage loop of the corresponding battery module;
the slave control detection modules are in one-to-one correspondence with the MSD modules, and each slave control detection module is electrically connected with the corresponding MSD module and changes the level state of the slave control detection module according to the state that the corresponding MSD module is in disconnection or connection; and
the master control module is electrically connected with the slave control detection modules, and is configured to receive the information of the self-level states transmitted by the slave control detection modules and determine that the MSD modules are in the disconnected or connected state according to the information.
2. The high voltage interlock detection system of claim 1 wherein the I/O port of each slave detection module is electrically connected to the high voltage interlock loop of the MSD, the master control module determining that the high voltage interlock loop of the MSD is open when the I/O port of the slave detection module is in a high level state, the MSD module is in an open state, and the master control module determining that the high voltage interlock loop of the MSD is on and the MSD module is in a connected state when the I/O port of the slave detection module is in a low level state.
3. The high voltage interlock detection system of claim 2 wherein the MSD module comprises:
a socket having a first high voltage interlock terminal group electrically connected to an I/O port of the slave detection module, and the first high voltage interlock terminal group being grounded; and
a plug having a second high voltage interlock terminal set;
when the second high-voltage interlocking terminal group is separated from the first high-voltage interlocking terminal group, the I/O port of the slave control detection module is in the high-level state, the high-voltage interlocking loop is disconnected, and when the second high-voltage interlocking terminal group is connected with the first high-voltage interlocking terminal group, the I/O port of the slave control detection module is in the low-level state, and the high-voltage interlocking loop is communicated.
4. The high voltage interlock detection system of claim 3 wherein the first high voltage interlock terminal group comprises a first high voltage interlock terminal and a second high voltage interlock terminal arranged in a spaced apart relationship, the first high voltage interlock terminal being electrically connected to the I/O port of the slave detection module, the second high voltage interlock terminal being grounded;
the high voltage interlock loop is disconnected when the second high voltage interlock terminal group is separated from the first high voltage interlock terminal or the second high voltage interlock terminal, and the high voltage interlock loop is communicated when the second high voltage interlock terminal group is connected with the first high voltage interlock terminal and the second high voltage interlock terminal.
5. The high voltage interlock detection system according to any one of claims 1 to 4, further comprising an electricity consumption module, wherein the plurality of battery modules are electrically connected with the electricity consumption module after being sequentially connected in series, and the main control module controls the plurality of battery modules to power off or power on the electricity consumption module according to the received information that the MSD module is in a disconnected or connected state.
6. The high voltage interlock detection system of claim 5 further comprising an address network bus, each slave detection module being electrically connected to the master control module through the address network bus.
7. A high voltage interlock detection method, characterized in that the main control module of the high voltage interlock detection system according to any one of claims 1 to 6 performs the steps comprising:
acquiring the level state of an I/O port of each slave control detection module, wherein the level state comprises a high level state and a low level state;
confirming the disconnection or connection state of the corresponding MSD module according to the level state;
and confirming a fault point according to the disconnection or connection state of the MSD module.
8. The method according to claim 7, wherein the confirming the disconnection or connection state of the corresponding MSD module according to the level state includes:
if the level state of the I/O port of the slave control detection module is a high level state, confirming that a high-voltage interlocking loop of the MSD module is disconnected and the MSD module is in a disconnected state;
and if the level state of the I/O port of the slave control detection module is a low level state, confirming that the high-voltage interlocking loop of the MSD module is communicated and the MSD module is in a communicated state.
9. The method according to claim 8, wherein if the level state of the I/O port of the slave detection module is a high level state, after confirming that the high voltage interlock loop of the MSD module is disconnected and the MSD module is in the disconnected state, further comprising:
and controlling any battery module to be powered off.
10. The method according to claim 7, wherein the determining the fault point according to the disconnection or connection state of the MSD module includes:
acquiring address information of the MSD module in a disconnected state;
and confirming the fault point according to the address information.
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| CN202310658180.1A CN116540150A (en) | 2023-06-05 | 2023-06-05 | High-voltage interlocking detection system and detection method |
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