CN116605055A - Signal processing circuit, wake-up device and battery management system - Google Patents
Signal processing circuit, wake-up device and battery management system Download PDFInfo
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- CN116605055A CN116605055A CN202310886249.6A CN202310886249A CN116605055A CN 116605055 A CN116605055 A CN 116605055A CN 202310886249 A CN202310886249 A CN 202310886249A CN 116605055 A CN116605055 A CN 116605055A
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- 230000005669 field effect Effects 0.000 claims description 7
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- 238000005516 engineering process Methods 0.000 description 2
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
Abstract
The application discloses a signal processing circuit, a wake-up device and a battery management system. The signal processing circuit includes: the on-off control module and the first current limiting module; the first end of the on-off control module is connected with the first end of the first current limiting module, the second end of the on-off control module and the second end of the first current limiting module are connected with a power supply, the third end of the on-off control module is connected with the signal output end, and the fourth end of the on-off control module is connected with the grounding end; under the condition that the power supply is conducted with the signal output end through the first current limiting module and the signal output end is short-circuited to the ground, the first current limiting module is disconnected with the signal output end, and the power supply is conducted with the grounding end. According to the embodiment of the application, the burning probability of the first current limiting module can be reduced.
Description
Technical Field
The present application relates to the field of electronic technologies, and in particular, to a signal processing circuit, a wake-up device, and a battery management system.
Background
With the development of electronic technology, more and more functional modules are integrated in electronic devices, and how to improve the reliability of the control process of these functional modules becomes one of the important issues to be solved.
At present, in the process that the signal processing circuit outputs wake-up signals to each functional module through the signal output end, the signal processing circuit often has a short-circuit working condition, so that a current limiting module connected with the signal output end in the signal processing circuit is easy to burn out.
Disclosure of Invention
The application provides a signal processing circuit, a wake-up device and a battery management system, which can reduce the burning probability of a first current limiting module.
In a first aspect, the present application provides a signal processing circuit comprising: the on-off control module and the first current limiting module; the first end of the on-off control module is connected with the first end of the first current limiting module, the second end of the on-off control module and the second end of the first current limiting module are connected with a power supply, the third end of the on-off control module is connected with the signal output end, and the fourth end of the on-off control module is connected with the grounding end; under the condition that the power supply is conducted with the signal output end through the first current limiting module and the signal output end is short-circuited to the ground, the first current limiting module is disconnected with the signal output end, and the power supply is conducted with the grounding end.
According to the technical scheme, the on-off control module is arranged in the signal processing circuit, the first current limiting module is arranged between the first end of the on-off control module and the power supply, the second end of the on-off control module is connected with the power supply, the third end of the on-off control module is connected with the signal output end, the fourth end of the on-off control module is connected with the grounding end, the on-off control module is configured to be conducted with the signal output end through the first current limiting module, the signal output end is in short circuit with the ground, and under the condition that the first current limiting module bears a large voltage drop, the first current limiting module is timely controlled to be disconnected with the signal output end, and the power supply is controlled to be conducted with the grounding end. Therefore, under the condition that the signal output end is short-circuited, the on-off control of the on-off control module forms short-circuit protection for the first current limiting module, so that the probability of burning out the first current limiting module is reduced.
In some embodiments, in the case that the power supply is connected to the signal output terminal via the first current limiting module and the signal output terminal is short-circuited to the power supply, the power supply is disconnected from the ground terminal.
The on-off control module is configured to be conducted with the signal output end through the first current limiting module, and the signal output end is short-circuited to the power supply, so that the power supply and the grounding end are timely controlled to be disconnected under the condition that the first current limiting module bears a large voltage drop. Therefore, under the condition that the signal output end is short-circuited, the on-off control of the on-off control module forms short power protection for the first current limiting module, so that the probability of burning out the first current limiting module is reduced.
In some embodiments, the on-off control module includes a first switch module and a second switch module; the first end of the first switch module is connected with a power supply, and the second end of the first switch module is connected with a grounding end; the first end of the second switch module is connected with the first end of the first current limiting module, and the second end of the second switch module is connected with the signal output end; under the condition that the second switch module is conducted and the signal output end is short-circuited to the ground, the first switch module is conducted, and the second switch module is disconnected; and under the condition that the second switch module is conducted and the signal output end is short-circuited to the power supply, the first switch module is disconnected.
In this way, when the second switch module is conducted and the signal output end is short-circuited to the ground, and the first current-limiting module bears a large voltage drop, the power supply and the grounding end can be conducted through the conduction of the first switch module, and the first current-limiting module and the signal output end can be disconnected through the disconnection of the second switch module, so that short-circuit protection is formed for the first current-limiting module; under the condition that the second switch module is conducted and the signal output end is short-circuited to the power supply, and the first current limiting module bears a large voltage drop, the power supply and the grounding end can be disconnected through the disconnection of the first switch module, so that short power supply protection is formed for the first current limiting module.
In some embodiments, the on-off control module further comprises a third switch module; the control end of the third switch module is connected with the signal input end, the first end of the third switch module is respectively connected with the second end of the first switch module and the control end of the second switch module, the second end of the third switch module is connected with the grounding end, and the third switch module is configured to be conducted under the condition that the control signal is received through the signal input end; the control terminal of the first switch module is connected with the first terminal of the second switch module, and the first switch module is configured to be conducted under the condition that the control signal is received through the signal input terminal.
By configuring the third switch module to be turned on when a control signal is received through the signal input, in this way, in the case that the control end of the first switch module is connected to the first end of the second switch module, the second switch module can be controlled to be turned on through the turned-on third switch module, and the first switch module can be controlled to be turned on through the turned-on second switch module, so that the power supply and the ground end are controlled to be turned on, and short-circuit protection is formed for the first current limiting module.
In some embodiments, the on-off control module further comprises a first voltage dividing module and a second voltage dividing module; the first end of the first voltage dividing module is connected with the first end of the third switch module, and the second end of the first voltage dividing module is respectively connected with the second end of the first switch module, the control end of the second switch module and the first end of the second voltage dividing module; the second end of the second voltage dividing module is connected with a power supply.
By arranging the first voltage division module and the second voltage division module, the potential state of the second end of the first switch module or the control end of the second switch module can be adjusted under the condition that the third switch module is conducted, and then the conduction or disconnection of the second switch module is controlled.
In some embodiments, the signal processing circuit further comprises a second current limiting module; the first end of the second current limiting module is connected with the signal input end, and the second end of the second current limiting module is connected with the control end of the third switch module.
The second current limiting module is arranged between the signal input end and the control end of the third switch module, so that the current of the control signal received by the control end of the third switch module can be limited, and the third switch module is protected from being burnt out.
In some embodiments, the signal processing circuit further comprises a pull-down module; the first end of the pull-down module is connected with the control end of the third switch module, and the second end of the pull-down module is connected with the grounding end.
Therefore, under the condition that the signal input end does not input a control signal to the control end of the third switch module, the potential of the control end of the third switch module can be stabilized in a low-level state through the arrangement of the pull-down module, and the anti-interference capability of the third switch module is enhanced.
In some embodiments, the first switch module comprises any one of a triode and a field effect transistor; the second switch module comprises any one of a triode and a field effect tube; the third switch module comprises any one of a triode and a field effect transistor.
In a second aspect, the present application provides a wake-up device comprising a wake-up control module and the signal processing circuit of the above embodiment; the wake-up control module is connected with the signal input end of the signal processing circuit and is configured to input a control signal to the signal processing circuit; the signal output end of the signal processing circuit is connected with the functional module, and the signal processing circuit is configured to send a wake-up signal to the functional module under the condition of receiving the control signal input by the wake-up control module so as to wake up the functional module through the wake-up signal.
According to the technical scheme, under the condition that the signal output end of the signal processing circuit is short-circuited, the first current limiting module is protected in a short-circuit mode through the on-off control of the on-off control module in the signal processing circuit, the burning probability of the first current limiting module is reduced, and therefore the signal processing circuit can successfully send a wake-up signal to the functional module under the condition that the signal processing circuit receives a control signal input by the wake-up control module, and the functional module is successfully awakened through the wake-up signal.
In some embodiments, the wake-up device further comprises a recheck module; the rechecking module is connected with the signal output end of the signal processing circuit and is configured to detect a wake-up signal sent by the signal processing circuit to the functional module.
By arranging the rechecking module, whether the signal processing circuit sends a wake-up signal to the functional module can be detected.
In a third aspect, the present application provides a battery management system, which includes a functional module and the wake-up device in the above embodiment.
The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.
Drawings
Features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a signal processing circuit according to an embodiment of the present application;
fig. 2 is a schematic diagram of a signal processing circuit according to another embodiment of the present application;
fig. 3 is a schematic diagram of a signal processing circuit according to another embodiment of the present application;
fig. 4 is a schematic diagram of a signal processing circuit according to still another embodiment of the present application;
fig. 5 is a schematic diagram of a signal processing circuit according to still another embodiment of the present application;
fig. 6 is a schematic diagram of a signal processing circuit according to still another embodiment of the present application;
fig. 7 is a schematic structural diagram of a wake-up device according to an embodiment of the present application.
Reference numerals in the specific embodiments are as follows:
10. a wake-up device;
100. the system comprises a signal processing circuit 200, a wake-up control module 300 and a rechecking module;
110. the device comprises an on-off control module 120, a first current limiting module 130, a second current limiting module 140 and a pull-down module;
111. the switching device comprises a first switching module 112, a second switching module 113, a third switching module 114, a first voltage dividing module 115 and a second voltage dividing module.
Detailed Description
Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.
In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).
In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.
In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; 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 embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.
In the process that the signal processing circuit outputs wake-up signals to each functional module through the signal output end, the power supply is conducted with the signal output end of the signal processing circuit through the current limiting module, and if the signal processing circuit has a short circuit working condition, voltage drop generated from the power supply to the signal output end can be applied to the current limiting module. The smaller the resistance value of the current limiting module is, the larger the current flowing through the current limiting module is, so that the current limiting module is easy to burn out, and the signal output end cannot output a wake-up signal to each functional module. The larger the resistance value of the current limiting module is, the larger the partial pressure is, the smaller the output current of the signal output end is, the output power of the signal output end is limited, the signal output end outputs wake-up signals to all the functional modules, and effective wake-up of all the functional modules can not be realized.
In order to solve the problem that when a signal processing circuit has a short circuit condition, a current limiting module is easy to burn out, and each functional module can not be effectively awakened, the embodiment of the application provides the signal processing circuit. Therefore, the signal processing circuit can still output a wake-up signal to each functional module under the short-circuit working condition so as to wake up each functional module successfully.
The following first describes a signal processing circuit provided in an embodiment of the present application.
Fig. 1 is a schematic diagram of a signal processing circuit according to an embodiment of the application. As shown in fig. 1, the signal processing circuit 100 includes an on-off control module 110 and a first current limiting module 120. The first end of the on-off control module 110 is connected with the first end of the first current limiting module 120, the second end of the on-off control module 110 and the second end of the first current limiting module 120 are connected with the power supply VCC, the third end of the on-off control module 110 is connected with the signal Output end Output, and the fourth end of the on-off control module 110 is connected with the grounding end. In the case that the power VCC is connected to the signal Output terminal Output through the first current limiting module 120 and the signal Output terminal Output is shorted to the ground, the first current limiting module 120 is disconnected from the signal Output terminal Output and the power VCC is connected to the ground.
Here, the on-off control module 110 may be configured to control the first current limiting module 120 to be disconnected from the signal Output terminal Output and control the power VCC to be connected to the ground terminal in a case that the power VCC is connected to the signal Output terminal Output via the first current limiting module 120 and the signal Output terminal Output is shorted to the ground.
Under the condition that the signal processing circuit 100 works normally, the on-off control module 110 controls the fourth end to be connected with the ground end and controls the first end to be connected with the third end, and as the third end of the on-off control module 110 is connected with the signal Output end Output, the first end of the on-off control module 110 is connected with the first end of the first current limiting module 120, and the second end of the first current limiting module 120 is connected with the power VCC, the power VCC can be conducted with the signal Output end Output through the first current limiting module 120 and the on-off control module 110 and transmit the power VCC voltage to the signal Output end Output, so that a wake-up signal is sent to each functional module through the signal Output end Output.
In the case of a short-circuit condition of the signal processing circuit 100, the signal Output terminal Output thereof may be shorted to ground. Since the second end of the on-off control module 110 is connected to the power VCC, the fourth end of the on-off control module 110 is connected to the ground, and thus the on-off control module 110 can control the power VCC to be connected to the ground by controlling the connection of the second end and the fourth end thereof. In addition, since the first end of the on-off control module 110 is connected to the first end of the first current limiting module 120, and the third end of the on-off control module 110 is connected to the signal Output end Output, the on-off control module 110 may further control the first current limiting module 120 to be disconnected from the signal Output end Output by controlling the disconnection between the first end and the third end.
When the on-off control module 110 controls the second end to be connected with the fourth end, the first end of the on-off control module 110 can be controlled to be connected with the second end, so that under the condition that the on-off control module 110 controls the first current limiting module 120 to be disconnected with the signal Output end Output and controls the power supply VCC to be conducted with the grounding end, the first current limiting module 120 between the power supply VCC and the first end of the on-off control module 110 can be short-circuited, the current flowing through the first current limiting module 120 is smaller, and the voltage drop on the first current limiting module 120 is smaller, so that the short-circuit protection of the first current limiting module 120 is formed.
In the above embodiment, by disposing the on-off control module 110 in the signal processing circuit 100, the first current limiting module 120 is disposed between the first end of the on-off control module 110 and the power VCC, the second end of the on-off control module 110 is connected to the power VCC, the third end is connected to the signal Output terminal Output, the fourth end is connected to the ground, and the on-off control module 110 is configured to control the first current limiting module 120 to be disconnected from the signal Output terminal Output and control the power VCC to be connected to the ground in time when the power VCC is connected to the signal Output terminal Output via the first current limiting module 120 and the signal Output terminal Output is shorted to the ground, resulting in that the first current limiting module 120 receives a large voltage drop. In this way, under the condition that the signal Output end is short-circuited, the on-off control of the on-off control module 110 forms short-circuit protection for the first current limiting module 120, so that the probability of burning out the first current limiting module 120 is reduced.
Optionally, please continue to refer to fig. 1, in the case that the power VCC is turned on to the signal Output terminal Output via the first current limiting module 120 and the signal Output terminal Output is short-circuited to the power VCC, the power VCC is disconnected from the ground.
Here, the on-off control module 110 may be further configured to control the power VCC to be disconnected from the ground terminal in case the power VCC is turned on with the signal Output terminal Output via the first current limiting module 120 and the signal Output terminal Output is short-circuited to the power VCC.
In the case of a short-circuit condition of the signal processing circuit 100, the signal Output terminal Output thereof may be shorted to the power supply VCC or another power supply having the same potential as the power supply VCC. At this time, the potential of the first end of the first current limiting module 120 is the same as the potential of the power VCC. Since the second terminal of the on-off control module 110 is connected to the power VCC, the fourth terminal of the on-off control module 110 is connected to the ground terminal, and thus the on-off control module 110 can control the power VCC to be disconnected from the ground terminal by controlling the disconnection between the second terminal and the fourth terminal thereof. In addition, since the first end of the on-off control module 110 is connected to the first end of the first current limiting module 120, and the third end of the on-off control module 110 is connected to the signal Output end Output, the on-off control module 110 can also control the first current limiting module 120 to be connected to the signal Output end Output by controlling the first end to be connected to the third end. In this way, in case the potential of the first end of the first current limiting module 120 and the potential of the second end of the first current limiting module 120 are both the same as the potential of the power VCC, there is no voltage drop across the first current limiting module 120, thereby forming a short power protection for the first current limiting module 120.
In the above embodiment, the on-off control module 110 is configured to timely control the power VCC to be disconnected from the ground terminal when the power VCC is connected to the signal Output terminal Output via the first current limiting module 120 and the signal Output terminal Output is short-circuited to the power VCC, resulting in the first current limiting module 120 bearing a large voltage drop. In this way, the on-off control of the on-off control module 110 forms a short power protection for the first current limiting module 120 in the case of a short circuit at the signal Output end Output, so that the probability of burning out the first current limiting module 120 is reduced.
Fig. 2 is a schematic diagram of a signal processing circuit according to another embodiment of the present application. As shown in fig. 2, the on-off control module 110 includes a first switch module 111 and a second switch module 112. A first end of the first switch module 111 may be connected to a power VCC; the second terminal of the first switch module 111 may be connected to a ground terminal. A first end of the second switch module 112 may be connected with a first end of the first current limiting module 120; a second terminal of the second switch module 112 may be connected to the signal Output terminal Output; the control terminal of the second switch module 112 may be connected to the second terminal of the first switch module 111 and the ground terminal.
According to some embodiments of the present application, please continue to refer to fig. 2, in the case that the second switch module 112 is turned on and the signal Output terminal Output is shorted to the ground, the first switch module 111 is turned on and the second switch module 112 is turned off.
Here, the on-off control module 110 may be configured to control the power VCC to be conducted with the ground terminal by connecting the second terminal and the fourth terminal of the on-off control module 110 by conducting the first switch module 111 in the case where the second switch module 112 is conducted and the signal Output terminal is shorted to the ground; by turning off the second switch module 112, the first end of the on-off control module 110 is disconnected from the third end, so as to control the first current limiting module 120 to be disconnected from the signal Output end Output.
Optionally, referring to fig. 2, in case the second switch module 112 is turned on and the signal Output terminal is short-circuited to the power supply, the first switch module 111 is turned off.
Here, the on-off control module 110 may be further configured to disconnect the second terminal and the fourth terminal of the on-off control module 110 by disconnecting the first switch module 111 in case that the second switch module 112 is turned on and the signal Output terminal is short-circuited to the power supply, thereby controlling the power supply VCC to be disconnected from the ground terminal.
In the above embodiment, when the second switch module 112 is turned on and the signal Output end Output is shorted to the ground, so that the first current limiting module 120 is subjected to a large voltage drop, the power VCC can be turned on to the ground through the first switch module 111, and the first current limiting module 120 can be turned off to the signal Output end Output through the second switch module 112, so that a short-circuit protection is formed for the first current limiting module 120; in the case that the second switch module 112 is turned on and the signal Output terminal Output is short-circuited to the power VCC, resulting in the first current limiting module 120 being subjected to a large voltage drop, the power VCC can be disconnected from the ground terminal by the first switch module 111 being turned off, thereby forming a short power protection for the first current limiting module 120.
Fig. 3 is a schematic diagram of a signal processing circuit according to another embodiment of the present application. As shown in fig. 3, the on-off control module 110 may further include a third switching module 113. The control end of the third switch module 113 is connected to the signal Input end Input, the first end of the third switch module 113 is connected to the second end of the first switch module 111 and the control end of the second switch module 112, respectively, and the second end of the third switch module 113 may be connected to the ground end. The control terminal of the third switch module 113 may receive the control signal through the signal Input terminal Input, and be turned on under the control of the control signal.
Optionally, referring to fig. 3, the control terminal of the first switch module 111 may be connected to the first terminal of the second switch module 112 according to some embodiments of the present application. Since the control terminal of the second switch module 112 is connected to the first terminal of the third switch module 113, in the case where the third switch module 113 receives the control signal and is turned on, the second switch module 112 can be controlled to be turned on by the third switch module 113. Also, since the control terminal of the first switch module 111 is connected to the first terminal of the second switch module 112, the third switch module 113 may also control the first switch module 111 to be turned on through the second switch module 112 when the second switch module 112 is turned on.
In the above embodiment, by configuring the third switch module 113 to be turned on when receiving the control signal through the signal Input terminal Input, in this way, when the control terminal of the first switch module 111 is connected to the first terminal of the second switch module 112, the second switch module 112 can be controlled to be turned on by the turned-on third switch module 113, and the first switch module 111 can be controlled to be turned on by the turned-on second switch module 112, so that the power VCC is controlled to be turned on with the ground terminal, so as to form short-circuit protection for the first current limiting module 120.
Fig. 4 is a schematic diagram of a signal processing circuit according to still another embodiment of the present application. As shown in fig. 4, the on-off control module 110 may further include a first voltage dividing module 114 and a second voltage dividing module 115. The first end of the first voltage dividing module 114 is connected to the first end of the third switch module 113, and the second end of the first voltage dividing module 114 is connected to the second end of the first switch module 111, the control end of the second switch module 112, and the first end of the second voltage dividing module 115, respectively. A second terminal of the second voltage dividing module 115 is connected to the power VCC.
According to some embodiments of the present application, optionally, in the case that the third switching module 113 is turned on, the power VCC may be turned on with the ground terminal via the second voltage dividing module 115, the first voltage dividing module 114, and the third switching module 113. By setting the resistances of the first voltage dividing module 114 and the second voltage dividing module 115, the potential state of the second terminal of the first switch module 111 or the control terminal of the second switch module 112 can be adjusted. For example, the resistance of the first voltage dividing module 114 may be set to 1K ohms, and the resistance of the second voltage dividing module 115 may be set to 47K ohms, so that the resistance of the second voltage dividing module 115 is far greater than the resistance of the first voltage dividing module 114, and thus the voltage drop across the second voltage dividing module 115 may be far greater than the voltage drop across the first voltage dividing module 114, so that the potential of the second end of the first switch module 111 or the control end of the second switch module 112 is kept in a low level state. In this way, when the first switch module 111 is turned off, the second switch module 112 can be controlled to be turned on or off by controlling the potential of the control terminal of the second switch module 112.
In the above embodiment, by providing the first voltage dividing module 114 and the second voltage dividing module 115, the potential state of the second end of the first switch module 111 or the control end of the second switch module 112 can be adjusted in the case where the third switch module 113 is turned on, thereby controlling the on or off of the second switch module 112.
Fig. 5 is a schematic diagram of a signal processing circuit according to still another embodiment of the present application. As shown in fig. 5, the signal processing circuit 100 may further include a second current limiting module 130. The first end of the second current limiting module 130 is connected to the signal Input end Input, and the second end of the second current limiting module 130 is connected to the control end of the third switch module 113.
In the above embodiment, the second current limiting module 130 is connected in series between the signal Input terminal Input of the signal processing circuit 100 and the control terminal of the third switch module 113, and the second current limiting module 130 may be used to limit the current magnitude of the control signal received by the control terminal of the third switch module 113, so as to protect the third switch module 113 from being burned out.
Optionally, referring to fig. 5, the signal processing circuit 100 may further include a pull-down module 140 according to some embodiments of the present application. The first end of the pull-down module 140 is connected to the control end of the third switch module 113, and the second end of the pull-down module 140 is connected to the ground.
In the above embodiment, in the case where the signal Input terminal Input does not Input the control signal to the control terminal of the third switch module 113, the potential of the control terminal of the third switch module 113 can be stabilized in the low level state by the setting of the pull-down module 140, and the anti-interference capability of the third switch module 113 is enhanced.
Fig. 6 is a schematic diagram of a signal processing circuit according to still another embodiment of the present application. As shown in fig. 6, the first, second and third switching modules 111, 112 and 113 may be switching devices, which may include any one of a transistor or a field effect transistor. For example, the first switching module 111 may include a transistor Q1, the second switching module 112 may include a transistor Q2, and the third switching module 113 may include a transistor Q3.
Alternatively, the transistor Q1 may be a PNP transistor, the transistor Q2 may be a PNP transistor, and the transistor Q3 may be an NPN transistor. The first current limiting module 120 may include a first current limiting resistor R1, the second current limiting module 130 may include a second current limiting resistor R2, the pull-down module 140 may include a pull-down resistor R3, the first voltage dividing module 114 may include a first voltage dividing resistor R4, and the second voltage dividing module 115 may include a second voltage dividing resistor R5.
Under the normal operation of the signal processing circuit 100, the control terminal of the transistor Q3 receives a control signal through the signal Input terminal Input and is turned on under the control of the control signal. Since the second terminal of the transistor Q3 is connected to the ground terminal, the potential of the control terminal of the transistor Q2 can be pulled to a low level by the turned-on transistor Q3, so that the transistor Q2 is turned on. At this time, the first end of the first current limiting resistor R1 may be connected to the signal Output terminal Output through the turned-on transistor Q2, so that the power supply voltage VCC may be transmitted to the signal Output terminal Output through the first current limiting resistor R1 and the transistor Q2, and a wake-up signal may be sent to each functional module through the signal Output terminal Output.
When the signal Output terminal Output of the signal processing circuit 100 is shorted to the ground, the signal Output terminal Output is connected to the ground, and the potential of the second terminal of the transistor Q2 is low. In the case where both transistor Q3 and transistor Q2 are turned on, the potential at the control terminal of transistor Q1 can be pulled low by the turned-on transistor Q2. Since the first end of the transistor Q1 is connected to the power VCC, the transistor Q1 is turned on at this time, and the potential of the control end of the transistor Q2 is pulled to a high level, so that the transistor Q2 is turned off, and the first end of the first current limiting resistor R1 is disconnected from the signal Output end Output. The transistor Q1 is turned on to short the first current limiting resistor R1, so that the first current limiting resistor R1 is protected from short circuit.
In the case where the signal Output terminal Output of the signal processing circuit 100 is short-circuited to the power supply, the signal Output terminal Output is connected to the power supply VCC or another power supply having the same potential as the power supply VCC, and the potential of the first terminal of the first current limiting resistor R1 is equal to the potential of the power supply VCC. Because the first end of triode Q1 is connected with power VCC, triode Q1's control end is connected with the first end of first current-limiting resistor R1, so triode Q1's the potential of first end equals with triode Q1's control end's potential, leads to triode Q1 to cut off for disconnect between power VCC and the ground connection. Under the condition that the triode Q3 and the triode Q2 are both conducted, the potential of the second end of the first current limiting resistor R1 is equal to that of the power supply VCC, so that no voltage drop exists on the first current limiting resistor R1, and short power supply protection for the first current limiting resistor R1 can be formed.
Fig. 7 is a schematic structural diagram of a wake-up device according to an embodiment of the present application. As shown in fig. 7, the wake-up device 10 may include a wake-up control module 200 and a signal processing circuit 100. The wake-up control module 200 is connected to the signal Input of the signal processing circuit 100. The signal Output terminal Output of the signal processing circuit 100 is connected to the functional module and is configured to send a wake-up signal to the functional module to wake up the functional module by the wake-up signal when receiving the control signal input by the wake-up control module 200. The wake-up control module 200 is configured to generate a control signal and input the control signal to the signal processing circuit 100, and alternatively, the wake-up control module 200 may be a micro control unit (Microcontroller Unit, MCU).
In the above embodiment, under the condition that the signal Output end Output of the signal processing circuit 100 is short-circuited, the first current limiting module 120 is protected by the on-off control of the on-off control module 110 in the signal processing circuit 100, so that the burning probability of the first current limiting module 120 is reduced, and the signal processing circuit 100 can send a wake-up signal to the functional module under the condition that the control signal input by the wake-up control module 200 is received, and wake up the functional module successfully through the wake-up signal.
Optionally, referring to fig. 7, the wake-up device 10 may further include a recheck module 300 according to some embodiments of the application. The review module 300 is connected to the signal Output terminal Output of the signal processing circuit 100. The recheck module 300 is configured to detect a wake-up signal sent by the signal processing circuit 100 to the functional module. If the review module 300 detects a high level signal, it indicates that the signal processing circuit 100 has sent a wake-up signal to the functional module; if the review module 300 does not detect the high level signal, it indicates that the signal processing circuit 100 does not send a wake-up signal to the functional module. By providing the recheck module 300, it is possible to detect whether the signal processing circuit 100 has sent a wake-up signal to a functional module.
According to some embodiments of the present application, the present application also provides a battery management system comprising the functional module and the wake-up device 10 according to any of the above embodiments.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical 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 application, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (11)
1. A signal processing circuit, comprising: the on-off control module and the first current limiting module;
the first end of the on-off control module is connected with the first end of the first current limiting module, the second end of the on-off control module and the second end of the first current limiting module are connected with a power supply, the third end of the on-off control module is connected with a signal output end, and the fourth end of the on-off control module is connected with a grounding end;
and under the condition that the power supply is conducted with the signal output end through the first current limiting module and the signal output end is short-circuited to ground, the first current limiting module is disconnected with the signal output end, and the power supply is conducted with the grounding end.
2. The signal processing circuit of claim 1, wherein the power supply is disconnected from the ground in the event that the power supply is turned on to the signal output via the first current limiting module and the signal output is shorted to the power supply.
3. The signal processing circuit according to claim 1 or 2, wherein the on-off control module comprises a first switch module and a second switch module;
the first end of the first switch module is connected with the power supply, and the second end of the first switch module is connected with the grounding end;
the first end of the second switch module is connected with the first end of the first current limiting module, and the second end of the second switch module is connected with the signal output end;
under the condition that the second switch module is conducted and the signal output end is short-circuited to the ground, the first switch module is conducted and the second switch module is disconnected;
and under the condition that the second switch module is conducted and the signal output end is short-circuited to a power supply, the first switch module is disconnected.
4. The signal processing circuit of claim 3, wherein the on-off control module further comprises a third switch module;
the control end of the third switch module is connected with the signal input end, the first end of the third switch module is respectively connected with the second end of the first switch module and the control end of the second switch module, the second end of the third switch module is connected with the grounding end, and the third switch module is configured to be conducted under the condition that the control signal is received through the signal input end;
the control terminal of the first switch module is connected with the first terminal of the second switch module, and the first switch module is configured to be conducted when the control signal is received through the signal input terminal.
5. The signal processing circuit of claim 4, wherein the on-off control module further comprises a first voltage dividing module and a second voltage dividing module;
the first end of the first voltage division module is connected with the first end of the third switch module, and the second end of the first voltage division module is respectively connected with the second end of the first switch module, the control end of the second switch module and the first end of the second voltage division module;
the second end of the second voltage dividing module is connected with the power supply.
6. The signal processing circuit of claim 4 or 5, further comprising a second current limiting module;
the first end of the second current limiting module is connected with the signal input end, and the second end of the second current limiting module is connected with the control end of the third switch module.
7. The signal processing circuit of claim 4, wherein the signal processing circuit further comprises a pull-down module;
the first end of the pull-down module is connected with the control end of the third switch module, and the second end of the pull-down module is connected with the grounding end.
8. The signal processing circuit of claim 4, wherein the first switching module comprises any one of a triode and a field effect transistor; the second switch module comprises any one of a triode and a field effect transistor; the third switch module comprises any one of a triode and a field effect transistor.
9. A wake-up device comprising a wake-up control module and a signal processing circuit as claimed in any of claims 1-8;
the wake-up control module is connected with the signal input end of the signal processing circuit and is configured to input a control signal to the signal processing circuit;
the signal output end of the signal processing circuit is connected with the functional module, and the signal processing circuit is configured to send a wake-up signal to the functional module under the condition that the control signal input by the wake-up control module is received, so as to wake up the functional module through the wake-up signal.
10. The wake-up device of claim 9, further comprising a recheck module;
the rechecking module is connected with the signal output end of the signal processing circuit and is configured to detect the wake-up signal sent by the signal processing circuit to the functional module.
11. A battery management system comprising a functional module and a wake-up device as claimed in claim 10.
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