CN115166507B - Detection circuit, power battery, vehicle and detection method - Google Patents
Detection circuit, power battery, vehicle and detection method Download PDFInfo
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- CN115166507B CN115166507B CN202210919485.9A CN202210919485A CN115166507B CN 115166507 B CN115166507 B CN 115166507B CN 202210919485 A CN202210919485 A CN 202210919485A CN 115166507 B CN115166507 B CN 115166507B
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- 238000001514 detection method Methods 0.000 title claims abstract description 140
- 238000000034 method Methods 0.000 claims description 6
- 230000001960 triggered effect Effects 0.000 abstract description 18
- 238000012423 maintenance Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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Abstract
The application discloses a detection circuit, a power battery, a vehicle and a detection method. The detection circuit is used for detecting the state of the fuse, the fuse is provided with a breaking primer, the breaking primer is used for triggering the fuse to fuse, the detection circuit comprises a detection module and a resistance circuit, the detection module is arranged at intervals with the fuse and is provided with a first port and a second port, the first port is electrically connected with the first end of the breaking primer, and the second port is electrically connected with the second end of the breaking primer; the resistance circuit is arranged between the detection module and the breaking primer and is connected with the breaking primer in parallel; the detection module determines the state of the fuse by detecting a resistance value between the first port and the second port. The detection circuit of the embodiment of the application determines the state of the fuse by detecting the resistance value between the first port and the second port through the detection module, so that the fuse can be monitored to determine whether the fuse breaking primer can be triggered normally or not and whether the triggering is successful or not.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a detection circuit, a power battery, a vehicle and a detection method.
Background
In the related art, the intelligent fuse is applied to the overcurrent protection of the battery pack, and the fuse is triggered to remind the battery pack of maintenance, however, how to monitor the state of the intelligent fuse in real time to ensure that the intelligent fuse can be triggered normally and determine whether the triggering is successful or not is a problem to be solved urgently.
Disclosure of Invention
The application provides a detection circuit, a power battery, a vehicle and a detection method.
The detection circuit is used for detecting the state of a fuse, the fuse is provided with a breaking primer, the breaking primer is used for triggering the fuse to be broken, the detection circuit comprises a detection module and a resistance circuit, the detection module is arranged at intervals with the fuse and is provided with a first port and a second port, the first port is electrically connected with the first end of the breaking primer, and the second port is electrically connected with the second end of the breaking primer; the resistance circuit is arranged between the detection module and the breaking primer, and is connected with the breaking primer in parallel; wherein the detection module determines the state of the fuse by detecting a resistance value between the first port and the second port.
The detection circuit of the embodiment of the application determines the state of the fuse by detecting the resistance value between the first port and the second port through the detection module, so that the fuse can be monitored to determine whether the fuse breaking primer can be triggered normally or not and whether the triggering is successful or not.
In some embodiments, the resistor circuit includes a first resistor having a first end connected to the first port and a second end connected to the second port.
In some embodiments, the resistor circuit includes a second resistor in parallel with the first resistor, a first end of the second resistor being connected to the first port, and a second end of the second resistor being connected to the second port.
In some embodiments, the first resistor is disposed proximate to the detection module and the second resistor is disposed on the fuse.
In some embodiments, the detection circuit includes a first connector and a second connector, the first connector and the second connector being connected by a wiring harness, the first connector being disposed on the fuse, the second connector being disposed proximate to the detection module.
In certain embodiments, the primer includes a pyrotechnic charge that, when ignited, triggers the fuse to blow.
In certain embodiments, the detection module is configured to enable the first port and the second port to cause the fuse to trigger the fuse to blow.
The power battery according to an embodiment of the present application includes the detection circuit according to any one of the above embodiments.
The power battery of the embodiment of the application is provided with the detection circuit, so that the power battery can be detected by the detection circuit, and the circuit for detecting the power battery is better.
The vehicle according to the embodiment of the application includes the power battery according to the above embodiment.
According to the vehicle provided by the embodiment of the application, the power battery can be timely found to be required to be maintained through the arrangement of the power battery, so that the safety of the vehicle in the use process is improved.
The detection method of the embodiment of the application comprises the following steps:
Outputting a detection signal to the primer through a first port and a second port of a detection module, wherein the first port is electrically connected with a first end of the primer, the second port is electrically connected with a second end of the primer, a resistance circuit is arranged between the detection module and the primer, and the resistance circuit is connected with the primer in parallel;
Confirming a resistance value between the first port and the second port according to a detection signal;
and confirming the state of the fuse according to the preset range of the resistance value.
According to the detection method, the state of the fuse is determined by detecting whether the resistance value between the first port and the second port is in the preset range or not through the detection module, so that the state of the fuse before and after the fuse breaking primer is triggered can be identified.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic plan view of a battery management module according to an embodiment of the present application;
fig. 2 is a schematic structural view of a vehicle according to an embodiment of the present application;
Fig. 3 is a flow chart of a detection method according to an embodiment of the present application.
Description of main reference numerals:
A vehicle 1000;
a power battery 100;
The battery management module 10, the detection circuit 11, the detection module 111, the first port 1111, the second port 1112, the resistor circuit 112, the first resistor 1121, the second resistor 1122, the first connector 113, the second connector 114, the wire harness 115, the fuse 12, and the primer 121.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The following disclosure provides many different embodiments, or examples, for implementing different features of the application. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
Referring to fig. 1 and 2, a detection circuit 11 according to an embodiment of the present application is used for detecting a state of a fuse 12, the fuse 12 has a fuse 121, the fuse 121 is used for triggering the fuse 12 to blow, the detection circuit 11 includes a detection module 111 and a resistor circuit 112, the detection module 111 is spaced from the fuse 12 and has a first port 1111 and a second port 1112, the first port 1111 is electrically connected to a first end of the fuse 121, and the second port 1112 is electrically connected to a second end of the fuse 121; the resistance circuit 112 is arranged between the detection module 111 and the breaking primer 121, and the resistance circuit 112 is connected with the breaking primer 121 in parallel; wherein the detection module 111 determines the state of the fuse 12 by detecting the resistance value between the first port 1111 and the second port 1112.
The detection circuit 11 according to the embodiment of the present application detects the resistance value of the resistance value between the first port 1111 and the second port 1112 through the detection module 111 to determine the state of the fuse 12, so that the fuse 12 can be monitored to determine whether the fuse 12 breaking object 121 can be triggered normally and whether the triggering is successful.
Specifically, the detection module 111 may be disposed in the detection circuit 11, the first port 1111 and the second port 1112 of the detection module 111 may be disposed at the same side apart, and the first port 1111 may be connected to the first end on the primer 121. Likewise, the second port 1112 of the detection module 111 may be connected to a second end of the primer 121 within the fuse 12 corresponding to the first end. The first port 1111 and the first end may be electrically connected by the wire harness 115, and the second port 1112 and the second end may be electrically connected by the wire harness 115 as well. The wiring harness 115 may be a positioning harness 115 or the like. The resistive circuit 112 may be disposed between the detection module 111 and the fuse 121 within the fuse 12 and connected in parallel by the wiring harness 115.
The primer 121 may be a substance or an object capable of fusing the fuse 12, and the primer 121 may fuse the fuse 12 when it is triggered or broken. Since the primer 121 has a certain resistance value, the state of the primer 121 when the resistance circuit 112 is connected in parallel with the primer 121 changes the resistance value between the first port 1111 and the second port 1112 detected by the detection module 111. The detection module 111 may detect the resistance value of the resistor circuit 112 between the first port 1111 and the second port 1112 by applying a current, and may determine the state of the fuse 12 by the difference in the resistance values. The detection module 111 may perform real-time detection.
Referring to fig. 1 and 2, in some embodiments, the resistor circuit 112 includes a first resistor 1121, a first end of the first resistor 1121 is connected to the first port 1111, and a second end of the first resistor 1121 is connected to the second port 1112.
As such, the first resistor 1121 is connected between the first port 1111 and the second port 1112 such that the detection circuit 11 is able to determine the state of the fuse 12 by detecting the value of the first resistor 1121 between the first port 1111 and the second port 1112.
Specifically, the first resistor 1121 of the resistor circuit 112 is disposed between the first port 1111 and the second port 1112 of the detection module 111, and the resistance value of the first resistor 1121 may be the same as that of the first resistor 1121, for example, 500 ohms may be selected, or may be set according to actual detection needs.
Referring to fig. 1 and 2, in some embodiments, the resistor circuit 112 includes a second resistor 1122 connected in parallel with the first resistor 1121, a first end of the second resistor 1122 is connected to the first port 1111, and a second end of the first resistor 1121 is connected to the second port 1112.
As such, the second resistor 1122 is located in the fuse 12 and is connected in parallel with the first resistor 1121, thereby enabling the detection circuit 11 to determine the state of the fuse 12 by detecting the parallel resistance of the first resistor 1121 and the second resistor 1122 in the fuse 12.
Specifically, the second resistor 1122 may have the same resistance as the first resistor 1121, and the second resistor 1122 may have a resistance of 500 ohms. Of course, the resistance of the second resistor 1122 may be set according to the actual test requirement.
Referring to fig. 1 and 2, in some embodiments, the first resistor 1121 and the second resistor 1122 have the same resistance.
In this way, the first resistor 1121 and the second resistor 1122 have the same resistance value, which can facilitate the detection of the detection resistance value by the detection module 111.
Specifically, the resistance of the first resistor 1121 may be the same as the resistance of the second resistor 1122, for example, the resistance of the first resistor 1121 and the resistance of the second resistor 1122 may be 500 ohms. Therefore, when the first resistor 1121 is connected in parallel with the second resistor 1122 and the primer 121 is in the triggered state, the detection module 111 detects that the resistance value of the resistor circuit 112 is 250 ohms.
Referring to fig. 1 and 2, in some embodiments, a first resistor 1121 is disposed proximate to the detection module 111 and a second resistor 1122 is disposed on the fuse 12.
In this manner, the first resistor 1121 is disposed near the detection module 111 such that the first resistor 1121 is not affected by the fuse 12, and the second resistor 1122 is disposed on the fuse 12 and can be connected to the first resistor 1121.
Specifically, the first resistor 1121 may be close to the detection module and connect the first port 1111 and the second port 1112 at the same time. The second resistor 1122 may be disposed on the fuse 12 and may be proximate to the fuse 121. The second resistor 1122 is connected in parallel with the first resistor 1121 and the primer 121.
Referring to fig. 1 and 2, in some embodiments, the detection circuit 11 includes a first connector 113 and a second connector 114, the first connector 113 and the second connector 114 are connected by a wire harness 115, the first connector 113 is disposed on the fuse 12, and the second connector 114 is disposed near the detection module 111.
In this way, the connection element of the detection module 111 and the fuse 12 may be provided by the connector and the lead wire harness 115 connects the detection module 111 and the fuse 12.
Specifically, the first connector 113 may be provided on the fuse 12, and may be provided on one side of the fuse 12. The second connector 114 may be disposed on a side closer to the detection module 111 and closer to the fuse 12. The first connector 113 and the second connector 114 may be connected to each other by a wire harness 115, and one end of the wire harness 115 of the second connector 114 is connected to the first port 1111 of the detection module 111 and led out from the second connector 114 to be connected to the first connector 113, the wire harness 115 is connected to the second resistor 1122 and the break 121, and led out from the first connector 113 to be connected to the second connector 114, and then the second connector 114 is connected to the second port 1112. Thereby, the detection circuit 11 can form a closed loop.
Referring to fig. 1 and 2, in some embodiments, the primer 121 includes a pyrotechnic charge that, when ignited, triggers the fuse 12 to blow.
In this way, the primer 121 may be used with powder to better trigger the fuse to blow.
Specifically, the primer 121 may include a composition of a chemical agent that is ignited by powder or the like and can cause combustion at a high temperature, and when the detection circuit 11 generates an abnormal state such as overcurrent or is impacted, the powder in the primer 121 may be ignited, and the fuse 12 may be triggered to blow when the powder is ignited.
Referring to fig. 1 and 2, in some embodiments, the detection module 111 is configured to enable the first port 1111 and the second port 1112 to cause the fuse 121 to trigger the fuse 12 to blow.
In this manner, the detection module 111 is able to enable the first port 1111 and the second port 1112 so that the fuse 121 in the fuse 12 can be actively triggered when the battery pack is detected to be unsafe.
Specifically, the detection module 111 may be enabled to the first port 1111 and the second port 1112, and it may be appreciated that when the battery is in an unsafe state or other unsafe state in which the battery is detected to be unsafe, for example, the battery is bumped or the battery is shorted, the detection module 111 may be enabled to the first port 1111 and the second port 1112, and send a signal to cause the primer 121 to trigger the fuse 12 to blow.
Referring to fig. 1 and 2, in some embodiments, the detection circuit 11 further includes a battery management module 10, and the detection module 111 is disposed on the battery management module 10.
In this way, the battery management module 10 can control the fuse 12 to manage and control the battery in combination with the detection module 111.
Specifically, the battery management module 10 may be a module that manages a battery, for example, the battery management module 10 may manage charge and discharge of the battery, or may make the battery in an optimal state by managing the battery. The detection module 111 may be provided on the battery management module 10, or the battery management module 10 may include the detection module 111.
Referring to fig. 1 and 2, a power battery 100 according to an embodiment of the present application includes a detection circuit 11 according to any one of the above embodiments.
The power battery 100 according to the embodiment of the present application has the detection circuit 11 so that the power battery 100 can be detected by the detection circuit 11, thereby better detecting the circuit of the power battery 100.
Specifically, the power battery 100 may be a lithium battery, a phosphoric acid battery, or the like, capable of providing a power source for the vehicle 1000. The detection circuit 11 may be connected in the main circuit of the power battery 100, and in the event of an unsafe condition of the power battery 100, for example, an excessive current of the power battery 100, the detection circuit 11 may enable the first port 1111 and the second port 1112 to trigger the fuse 12, thereby reminding the power battery 100 that maintenance is required.
Referring to fig. 1 and 2, a vehicle 1000 according to an embodiment of the present application includes a power battery 100 according to the above-described embodiment.
The vehicle 1000 of the embodiment of the application can timely find that the power battery 100 needs maintenance by arranging the power battery 100, thereby improving the safety of the vehicle 1000 in the use process.
Specifically, the vehicle 1000 may be a vehicle that uses a battery as power. For example, the vehicle 1000 may be an electric tricycle, an electric car, an electric bus, an electric truck, a hybrid electric car, or the like. The plurality of power cells 100 may also be connected to the vehicle 1000 in series, parallel, or the like as desired.
Referring to fig. 3, a detection method according to an embodiment of the present application includes:
S10, outputting a detection signal to the primer 121 through a first port 1111 and a second port 1112 of the detection module 111, wherein the first port 1111 is electrically connected with a first end of the primer 121, the second port 1112 is electrically connected with a second end of the primer 121, a resistance circuit 112 is arranged between the detection module 111 and the primer 121, and the resistance circuit 112 is connected with the primer 121 in parallel;
s20, confirming the resistance value between the first port 1111 and the second port 1112 according to the detection signal;
and S30, confirming the state of the fuse 12 according to the preset range of the resistance value.
The detection method according to the embodiment of the present application determines the state of the fuse 12 by detecting whether the resistance value between the first port 1111 and the second port 1112 is within the predetermined range by the detection module 111, so that the state of the fuse 12 before and after the fuse 12 is triggered by the fuse primer 121 can be recognized.
Specifically, to implement the detection method, step S10 may be first performed, and the detection module 111 may output a detection signal to the primer 121 through the first port 1111 and the second port 1112, where the detection signal may be a detection current sent by the detection module 111. For example, the magnitude of the detection current may be 40mA. Step S20 may then be taken, and the detection module 111 may determine, according to the detection current sent in step S10, a resistance value of the resistor circuit 112 between the first port 1111 and the second port 1112 through the detection signal. Step S30 may then be taken again, and the detection module 111 determines the different states of the fuse 12 by determining whether the resistance value confirmed in step S20 is within a predetermined range. For example, the fuse 12 may be normal and the fuse primer 121 is not triggered or the fuse 12 primer 121 is triggered, or the fuse 12 is in a fault state.
In summary, referring to fig. 1 to 3, the example where the first resistor 1121 is 500 ohms, the second resistor 1122 is 500 ohms, and the resistance of the primer 121 is about 2 ohms will be described as follows:
It is to be understood that the resistance value of the parallel resistance between the first port 1111 and the second port 1112 is 2 ohms (r=2Ω) calculated from the resistance of the parallel circuit.
The detection module 111 of the battery management module 10 may output a detection current of 40mA between the first port 1111 and the second port 1112, and the detection module 111 may detect the resistance value in the resistance circuit 112.
Therefore, the resistance value between the first port 1111 and the second port 1112 detected by the detection module 111 before the trigger of the primer 121 of the fuse 12 is fixed to 2 ohms (r=2Ω), the primer 121 after the trigger is in an open state, and the resistance value between the first port 1111 and the second port 1112 detected by the detection module 111 is 250 ohms (r=250Ω).
In a state before the trigger 121 of the fuse 12 is triggered, if the resistance value between the first port 1111 and the second port 1112 detected by the detection circuit 11 is 1 ohm or less (r.ltoreq.1Ω), it can be confirmed that the driving circuit in the fuse 12 is short-circuited. It is to be understood that the drive circuit may be a separate circuit in the fuse 12.
If the resistance value between the first port 1111 and the second port 1112 detected by the detection circuit 11 is greater than 1 ohm and less than or equal to 10 ohms (1Ω < r+.ltoreq.10Ω), it is confirmed that the driving circuit in the fuse 12 is normal, that is, the detection circuit 11 can enable the first port 1111 and the second port 1112 to actively trigger the primer 121 in the fuse 12 when the power battery 100 is unsafe.
In a state where the primer 121 of the fuse 12 is triggered, if the resistance value between the first port 1111 and the second port 1112 detected by the detection circuit 11 is 250 ohms (r=250Ω), it can be confirmed that the primer 121 of the fuse 12 is triggered, and the power battery 100 is alerted to need maintenance.
In a state after the trigger 121 of the fuse 12 is triggered, if the resistance value between the first port 1111 and the second port 1112 detected by the detection circuit 11 is a resistance value other than 250 ohms (r=250Ω), it can be confirmed that the fuse 12 is in a triggered abnormal state.
In the description of the present specification, reference to the terms "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A detection circuit for detecting a state of a fuse having a fuse primer for triggering the fuse to blow, the detection circuit comprising:
the detection module is arranged at intervals with the fuse and is provided with a first port and a second port, the first port is electrically connected with the first end of the breaking primer, and the second port is electrically connected with the second end of the breaking primer;
The resistance circuit is arranged between the detection module and the breaking primer and is connected with the breaking primer in parallel;
The detection module is used for determining the state of the fuse through detecting the resistance value between the first port and the second port, the resistance circuit comprises a first resistor and a second resistor connected with the first resistor in parallel, the first resistor is close to the detection module, and the second resistor is arranged on the fuse.
2. The detection circuit of claim 1, wherein a first end of the first resistor is connected to the first port and a second end of the first resistor is connected to the second port.
3. The detection circuit of claim 2, wherein a first end of the second resistor is connected to the first port and a second end of the second resistor is connected to the second port.
4. The detection circuit of claim 1, wherein the detection circuit comprises a first connector and a second connector, the first connector and the second connector being connected by a wiring harness, the first connector being disposed on the fuse, the second connector being disposed proximate the detection module.
5. The detection circuit of claim 1, wherein the primer includes a pyrotechnic charge that, when ignited, triggers the fuse to blow.
6. The detection circuit of claim 1, wherein the detection module is configured to enable the first port and the second port to cause the fuse to trigger the fuse to blow.
7. A power cell comprising a detection circuit according to any one of claims 1-6.
8. A vehicle comprising the power cell of claim 7.
9. A method of detecting a state of a fuse having a primer for triggering the fuse to blow, the method comprising:
Outputting a detection signal to the primer through a first port and a second port of a detection module, wherein the first port is electrically connected with a first end of the primer, the second port is electrically connected with a second end of the primer, a resistance circuit is arranged between the detection module and the primer, and the resistance circuit is connected with the primer in parallel;
Confirming a resistance value between the first port and the second port according to a detection signal;
And confirming the state of the fuse according to a preset range of the resistance value, wherein the resistance circuit comprises a first resistor and a second resistor connected with the first resistor in parallel, the first resistor is arranged close to the detection module, and the second resistor is arranged on the fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210919485.9A CN115166507B (en) | 2022-08-02 | 2022-08-02 | Detection circuit, power battery, vehicle and detection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210919485.9A CN115166507B (en) | 2022-08-02 | 2022-08-02 | Detection circuit, power battery, vehicle and detection method |
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| CN115166507A CN115166507A (en) | 2022-10-11 |
| CN115166507B true CN115166507B (en) | 2024-05-28 |
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