CN220040591U - Discharge detection circuit, discharge circuit, and electronic apparatus - Google Patents
Discharge detection circuit, discharge circuit, and electronic apparatus Download PDFInfo
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- CN220040591U CN220040591U CN202320798889.7U CN202320798889U CN220040591U CN 220040591 U CN220040591 U CN 220040591U CN 202320798889 U CN202320798889 U CN 202320798889U CN 220040591 U CN220040591 U CN 220040591U
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- 238000004146 energy storage Methods 0.000 claims abstract description 54
- 238000007599 discharging Methods 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides a discharge detection circuit, a discharge circuit and electronic equipment, and relates to the technical field of electronic circuits. The discharge detection circuit includes: the device comprises a discharge module, an overcurrent detection module and a short circuit detection module; the input end of the discharging module is connected with the energy storage module, and the output end of the discharging module is connected with the load; the first input end of the overcurrent detection module is connected with the energy storage module, the second input end of the overcurrent detection module is connected with the output end of the discharge module, and the output end of the overcurrent detection module is used for outputting an overcurrent signal; the first input end of the short circuit detection module is connected with the reference end of the overcurrent detection module, the second input end of the short circuit detection module is connected with the output end of the discharge module, and the output end of the short circuit detection module is used for outputting a short circuit signal; the reference end of the short circuit detection module is grounded through a reference current source. The utility model can realize the overcurrent protection and the short-circuit protection with low power consumption.
Description
Technical Field
The present utility model relates to the technical field of electronic circuits, and in particular, to a discharge detection circuit, a discharge circuit, and an electronic device.
Background
With the development of electronic circuit technology, the requirements on standby time of portable electronic devices are higher and higher, and the requirements on low power consumption of the portable electronic devices are very common.
In the existing portable electronic device, two independent detection systems with an overcurrent protection function and a short-circuit protection function are generally provided, so that the battery is timely detected and effectively protected when the battery discharges abnormally high current, but the two detection systems can bring two power consumption, and the development requirement of the low-power-consumption design of the portable electronic device is not met.
Disclosure of Invention
The present utility model aims to solve the above-mentioned drawbacks of the prior art and to provide a discharge detection circuit, a discharge circuit and an electronic device for realizing low power consumption overcurrent protection and short-circuit protection.
In order to achieve the above purpose, the technical scheme adopted by the embodiment of the utility model is as follows:
in a first aspect, an embodiment of the present utility model provides a discharge detection circuit, including: the device comprises a discharge module, an overcurrent detection module and a short circuit detection module;
the input end of the discharging module is connected with the energy storage module, and the output end of the discharging module is connected with a load;
the first input end of the overcurrent detection module is connected with the energy storage module, the second input end of the overcurrent detection module is connected with the output end of the discharge module, and the output end of the overcurrent detection module is used for outputting an overcurrent signal;
the first input end of the short circuit detection module is connected with the reference end of the overcurrent detection module, the second input end of the short circuit detection module is connected with the output end of the discharge module, and the output end of the short circuit detection module is used for outputting a short circuit signal;
the reference end of the short circuit detection module is grounded through a reference current source.
In one possible implementation manner, the over-current detection module includes: an overcurrent threshold detection unit and an overcurrent comparison unit;
the first end of the overcurrent threshold detection unit is used as the first input end of the overcurrent detection module, the second end of the overcurrent threshold detection unit is connected with the first input end of the overcurrent comparison unit and used as the reference end of the overcurrent detection module, the second input end of the overcurrent comparison unit is used as the second input end of the overcurrent detection module, and the output end of the overcurrent comparison unit is used as the output end of the overcurrent detection module.
In one possible implementation, the discharge module and the over-current threshold detection unit are transistors, and the size ratio of the discharge module and the over-current threshold detection unit is a ratio of an over-current protection threshold current to a reference current of the reference current source.
In one possible implementation, the discharging module includes: a first transistor;
the first pole of the first transistor is connected with a preset bias power supply, the second pole of the first transistor is used as an input end of the discharging module, and the third pole of the first transistor is used as an output end of the discharging module.
In one possible implementation manner, the overcurrent threshold detection unit includes: a second transistor;
the first pole of the second transistor is connected with a preset bias power supply, the second pole of the second transistor is used as the first end of the overcurrent threshold detection unit, and the third pole of the second transistor is used as the second end of the overcurrent threshold detection unit.
In one possible implementation, the short circuit detection module includes: a short-circuit threshold detection unit and a short-circuit comparison unit;
the first end of the short-circuit threshold detection unit is used as the first input end of the short-circuit detection module, the second end of the short-circuit threshold detection unit is connected with the positive input end of the short-circuit comparison unit and used as the reference end of the short-circuit detection module, the negative input end of the short-circuit comparison unit is used as the second input end of the short-circuit detection module, and the output end of the short-circuit comparison unit is used as the output end of the short-circuit detection module.
In one possible implementation, the discharge module and the short-circuit threshold detection unit are transistors, and the size ratio of the discharge module and the short-circuit threshold detection unit is a ratio of a short-circuit protection threshold current to a reference current of the reference current source.
In one possible implementation manner, the short-circuit threshold detection unit includes: a third transistor;
the first pole of the third transistor is connected with a preset bias power supply, the second pole of the third transistor is used as the first end of the short-circuit threshold detection unit, and the third pole of the third transistor is used as the second end of the short-circuit threshold detection unit.
In a second aspect, an embodiment of the present utility model further provides a discharge circuit, including: an energy storage module and a discharge detection circuit as claimed in any one of the first aspects, the energy storage module being connected to a discharge module in the discharge detection circuit.
In a third aspect, an embodiment of the present utility model further provides an electronic device, including: a discharge circuit and a load as described in the second aspect; and a discharge detection circuit in the discharge circuit is connected with the load.
The beneficial effects of the utility model are as follows:
the utility model provides a discharge detection circuit, a discharge circuit and electronic equipment, wherein an overcurrent detection module and a short circuit detection module are arranged between an energy storage module and a reference current source to obtain reference current, the total loss of the whole discharge detection circuit is only the loss of the reference current, two kinds of function detection can be realized through one detection branch formed by the overcurrent detection module and the short circuit detection module, and compared with the traditional two detection branches, the power consumption of the discharge detection circuit provided by the embodiment is reduced, and the low-power consumption design is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic block diagram of a discharge detection circuit according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a discharge detection circuit according to an embodiment of the present utility model;
FIG. 3 is a circuit diagram of a discharge detection circuit according to an embodiment of the present utility model;
FIG. 4 is a schematic block diagram of a discharge circuit according to an embodiment of the present utility model;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Furthermore, the terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the features of the embodiments of the present utility model may be combined with each other without conflict.
Referring to fig. 1, a schematic block diagram of a discharge detection circuit according to an embodiment of the present utility model is shown in fig. 1, and the discharge detection circuit includes: a discharge module 10, an overcurrent detection module 20, and a short circuit detection module 30.
The input end of the discharging module 10 is connected with the energy storage module, and the output end of the discharging module 10 is connected with a load; the first input end of the overcurrent detection module 20 is connected with the energy storage module, the second input end of the overcurrent detection module 20 is connected with the output end of the discharge module 10, and the output end of the overcurrent detection module 20 is used for outputting an overcurrent signal; the first input end of the short circuit detection module 30 is connected with the reference end of the overcurrent detection module 20, the second input end of the short circuit detection module 30 is connected with the output end of the discharge module 10, and the output end of the short circuit detection module 30 is used for outputting a short circuit signal; the reference terminal of the short detection module 30 is grounded GND through a reference current source.
In this embodiment, the energy storage module stores energy in advance through charging of the charging circuit, and in the working process of the electronic device, the energy storage module is connected with the load through the discharging module 10, so as to discharge the load through the discharging module 10, and drive the load to work through the electronic device, where the load may represent a software program in an operating state in the electronic device, the more the software programs are running in the electronic device, the more complex the running function is, the larger the load is, and the magnitude of the discharging current released by the energy storage module is different for loads with different magnitudes.
The energy storage module is connected with the first input end of the overcurrent detection module 20, the reference end of the overcurrent detection module is connected with the first input end of the short circuit detection module 30, the reference end of the short circuit detection module is grounded with the reference current source, the energy storage module provides reference current i_ref corresponding to the reference current source for the overcurrent detection module 20 and the short circuit detection module 30 according to the reference current set by the reference current source, the overcurrent detection module 20 determines an overcurrent protection threshold current i_ocp according to the reference current i_ref and a preset proportion K1 of the overcurrent detection module 20, and the short circuit detection module 30 determines a short circuit protection threshold current i_scp according to the reference current i_ref and a preset proportion K2 of the short circuit detection module 30.
For example, the over-current protection threshold current i_ocp=i_ref×k1, the short-circuit protection threshold current i_scp=i_ref×k2, wherein the over-current protection threshold current i_ocp is smaller than the short-circuit protection threshold current i_scp, i.e. K1 is smaller than K2.
According to the overcurrent protection threshold current i_ocp set by the overcurrent detection module 20, the overcurrent protection threshold voltage vsns_ocp is sampled at the reference end of the overcurrent detection module 20, the discharge voltage provided to the load by the energy storage module is VSYS, and if the overcurrent detection module 20 determines that the discharge voltage VSYS is lower than the overcurrent protection threshold voltage vsns_ocp, the overcurrent detection module 20 outputs an overcurrent signal, wherein the overcurrent signal vo_ocp is a logic high level, which indicates that the overcurrent detection module 20 detects that the energy storage module discharges and overcurrent.
According to the short-circuit protection threshold current i_scp set by the short-circuit detection module 30, the short-circuit protection threshold voltage vsns_scp is sampled at the reference end of the short-circuit detection module 30, the discharge voltage provided to the load by the energy storage module is VSYS, and if the short-circuit detection module 30 determines that the discharge voltage VSYS is lower than the short-circuit protection threshold voltage vsns_scp, the short-circuit detection module 30 outputs a short-circuit signal, wherein the short-circuit signal vo_scp is a logic high level, which indicates that the short-circuit detection module 30 detects that the energy storage module discharges and short-circuits.
According to the discharge detection circuit provided by the embodiment, the overcurrent detection module and the short circuit detection module both provide reference current by the same reference current source through the energy storage module, the total loss of the whole discharge detection circuit is only the loss of the reference current, two kinds of function detection can be realized through one detection branch consisting of the overcurrent detection module and the short circuit detection module, and compared with the traditional two detection branches, the power consumption of the discharge detection circuit provided by the embodiment is remarkably reduced, and the low-power consumption design is realized.
In one possible implementation, referring to fig. 2, a second schematic block diagram of a discharge detection circuit provided for the embodiment of the present utility model, as shown in fig. 2, the overcurrent detection module 20 includes: an overcurrent threshold detection unit 21 and an overcurrent comparison unit 22.
The first end of the overcurrent threshold detection unit 21 is used as the first input end of the overcurrent detection module 20, the second end of the overcurrent threshold detection unit 21 is connected with the first input end of the overcurrent comparison unit 22 to be used as the reference end of the overcurrent detection module 20, the second input end of the overcurrent comparison unit 22 is used as the second input end of the overcurrent detection module 20, and the output end of the overcurrent comparison unit 22 is used as the output end of the overcurrent detection module 20.
In this embodiment, the energy storage module is connected to the overcurrent comparing unit 22 through the overcurrent threshold detecting unit 21, the overcurrent threshold detecting unit 21 obtains the reference current i_ref through the energy storage unit, calculates the overcurrent protection threshold current i_ocp according to the reference current i_ref and the preset proportion K1 of the overcurrent threshold detecting unit 21, and the overcurrent threshold detecting unit 21 provides the overcurrent protection threshold voltage vsns_ocp to the overcurrent comparing unit 22 according to the overcurrent protection threshold current i_ocp.
The first input end of the overcurrent comparing unit 22 is connected to the second end of the overcurrent threshold detecting unit 21, the overcurrent protection threshold voltage vsns_ocp is obtained, the second input end of the overcurrent comparing unit 22 is connected to the output end of the discharging module 10, the discharging voltage provided by the energy storage module to the load is obtained to be VSYS, and if the overcurrent comparing unit 22 determines that the discharging voltage VSYS is lower than the overcurrent protection threshold voltage vsns_ocp, the overcurrent comparing unit 22 outputs an overcurrent signal.
In one possible implementation, as shown in fig. 2, the short circuit detection module 30 includes: a short-circuit threshold detection unit 31 and a short-circuit comparison unit 32.
The first end of the short-circuit threshold detection unit 31 is used as the first input end of the short-circuit detection module 30, the second end of the short-circuit threshold detection unit 31 is connected with the positive input end of the short-circuit comparison unit 32 to be used as the reference end of the short-circuit detection module 30, the negative input end of the short-circuit comparison unit 32 is used as the second input end of the short-circuit detection module 30, and the output end of the short-circuit comparison unit 32 is used as the output end of the short-circuit detection module 30.
In this embodiment, the energy storage module is further connected to the short-circuit threshold detection unit 31 through the overcurrent threshold detection unit 21, the short-circuit threshold detection unit 31 also obtains the reference current i_ref through the energy storage module, calculates the short-circuit protection threshold current i_scp according to the reference current i_ref and the preset ratio K2 of the short-circuit threshold detection unit 31, and the short-circuit threshold detection unit 31 provides the short-circuit comparison unit 32 with the short-circuit protection threshold voltage vsns_scp according to the short-circuit protection threshold current i_scp.
The first input end of the short circuit comparing unit 32 is connected to the second end of the short circuit threshold detecting unit 31, and obtains a short circuit protection threshold voltage vsns_scp, the second input end of the short circuit comparing unit 32 is connected to the output end of the discharging module 10, and obtains a discharging voltage VSYS provided by the energy storage module to the load, and if the short circuit comparing unit 32 determines that the discharging voltage VSYS is lower than the short circuit protection threshold voltage vsns_scp, the short circuit comparing unit 32 outputs an overcurrent signal.
According to the discharge detection circuit provided by the embodiment, under the condition that loss caused by the comparison unit is not considered, the overcurrent threshold detection unit and the short-circuit threshold detection unit both provide reference current through the energy storage module by the same reference current source, the total loss of the whole discharge detection circuit is only the loss of the reference current, two kinds of function detection can be realized through one detection branch formed by the overcurrent threshold detection unit and the short-circuit threshold detection unit, and compared with the traditional two detection branches, the power consumption of the discharge detection circuit provided by the embodiment is remarkably reduced, and the low-power consumption design is realized.
In one possible implementation, the discharge module 10 and the over-current threshold detection unit 21 are transistors, and the size ratio of the discharge module 10 and the over-current threshold detection unit 21 is the ratio of the over-current protection threshold current to the reference current of the reference current source.
In this embodiment, the ratio of the currents of the reference current i_ref and the overcurrent-threshold-value detection unit 21 is determined by the size ratio of the transistors of the discharge module 10 and the transistors of the overcurrent-threshold-value detection unit 21, and the overcurrent protection threshold current can be calculated based on the size ratio of the transistors of the discharge module 10 and the transistors of the overcurrent-threshold-value detection unit 21, and the reference current i_ref supplied from the reference current source.
For example, if the size ratio of the transistor of the discharge module 10 to the transistor of the overcurrent threshold detection unit 21 is K1:1, the overcurrent protection threshold current i_ocp=k1×i_ref of the overcurrent threshold detection unit 21 can be determined according to the size ratio of the discharge module 10 and the overcurrent threshold detection unit 21 and the reference current i_ref set by the reference current source.
According to the discharge detection circuit provided by the embodiment, the accurate adjustment of the overcurrent protection threshold current can be realized by flexibly designing the size proportion of the discharge module and the overcurrent threshold detection unit and the size of the reference current; and the total power consumption of the discharge detection circuit can be flexibly controlled within a reasonable range by optimizing the relative proportion relation between the size proportion and the reference current.
In another possible implementation, the discharge module 10 and the short-circuit threshold detection unit 31 are transistors, and the size ratio of the discharge module 10 and the short-circuit threshold detection unit 31 is the ratio of the short-circuit protection threshold current to the reference current of the reference current source.
In the present embodiment, the ratio of the currents of the reference current i_ref and the short-circuit threshold value detection unit 31 is determined by the size ratio of the transistors of the discharge module 10 and the short-circuit threshold value detection unit 31, and the short-circuit threshold value current can be calculated based on the size ratio of the transistors of the discharge module 10 and the short-circuit threshold value detection unit 31 and the reference current i_ref supplied from the reference current source.
For example, if the size ratio of the transistor of the discharge module 10 to the transistor of the short threshold detection unit 31 is K2:1, a short-circuit protection threshold current i_scp=k2 i_ref of the short-circuit threshold detection unit 31 may be determined according to the size ratio of the discharge module 10 and the short-circuit threshold detection unit 31 and a reference current i_ref set by a reference current source.
According to the discharge detection circuit provided by the embodiment, the accurate adjustment of the short-circuit protection threshold current can be realized by flexibly designing the size proportion of the discharge module and the overcurrent threshold detection unit and the size of the reference current; and the total power consumption of the discharge detection circuit can be flexibly controlled within a reasonable range by optimizing the relative proportion relation between the size proportion and the reference current.
Referring to fig. 3, referring to a circuit diagram of the discharge detection circuit provided in the embodiment of the present utility model, as shown in fig. 3, the discharge module 10 includes: a first transistor M1.
The first pole of the first transistor M0 is connected to a preset bias power supply, the second pole of the first transistor M0 is used as an input end of the discharge module 10, and the third pole of the first transistor M0 is used as an output end of the discharge module 10.
In this embodiment, the first transistor M0 is a power transistor, and the first pole, i.e., the gate, of the first transistor M0 is connected to a preset bias power supply, where the preset bias power supply is configured to provide a bias voltage Vgate for the first transistor M0; the second pole and the third pole of the first transistor M0 are respectively a drain electrode and a source electrode of the first transistor M0, and are used for respectively connecting the energy storage module and the load, wherein if the second pole is the drain electrode, the third pole is the source electrode, and if the second pole is the source electrode, the third pole is the drain electrode.
The energy storage module supplies power to a load through a power passage formed by the first transistor M0, an energy storage voltage VBAT and a discharge voltage VSYS are respectively formed on a second pole and a third pole of the first transistor M0, the energy storage module supplies power to the load, and a load current i_load is formed on the load according to the size of the load.
As shown in fig. 3, the overcurrent threshold detection unit 21 includes: and a second transistor M1.
A first pole of the second transistor M1 is connected to a preset bias power supply, a second pole of the second transistor M1 is used as a first end of the overcurrent threshold detection unit 21, and a third pole of the second transistor M1 is used as a second end of the overcurrent threshold detection unit 21.
In this embodiment, the first stage, i.e., the gate of the second transistor M1 is commonly connected to the gate of the first transistor M0, and the bias voltage Vgate is obtained by a preset bias power supply, and the second pole and the third pole of the second transistor M1 are respectively a drain and a source of the second transistor M1 and are respectively connected to the energy storage module and the first input end of the overcurrent comparing unit 22, where if the second pole is the drain, the third pole is the source, and if the second pole is the source, the third pole is the drain.
The over-current comparing unit 22 is an over-current comparator ocp_comp, a third electrode of the second transistor M1 is connected to a positive input terminal of the over-current comparator ocp_comp, a negative input terminal of the over-current comparator ocp_comp is connected to a third electrode of the first transistor M0, and the discharge voltage VSYS is sampled.
The size ratio of the first transistor M0 to the second transistor M1 is k1:1, the energy storage module provides a reference current, the over-current protection threshold voltage vsns_ocp is generated at the third electrode of the second transistor M1 according to the size ratio of the first transistor M0 to the second transistor M1 and the reference current, an equivalent over-current protection threshold current i_ocp is formed between the drain and source stages of the first transistor M0, the positive input end of the over-current comparator ocp_comp acquires the over-current protection threshold voltage vsns_ocp at the third electrode of the second transistor M1, the over-current comparator ocp_comp compares the over-current protection threshold voltage ns_ocp with the discharge voltage VSYS, and if the discharge voltage VSYS is lower than the over-current protection threshold voltage vsns_ocp, the over-current comparator OCP outputs a logically high over-current signal to indicate that the energy storage module discharges over-current.
As shown in fig. 3, the short threshold detection unit 31 includes: and a third transistor M2.
The first pole of the third transistor M2 is connected to a preset bias power supply, the second pole of the third transistor M2 is used as a first end of the short-circuit threshold detection unit, and the third pole of the third transistor is used as a second end of the short-circuit threshold detection unit.
In this embodiment, the first stage, i.e., the gate of the third transistor M2 is commonly connected to the gate of the first transistor M0 and the gate of the second transistor M1, the bias voltage Vgate is obtained through a preset bias power supply, and the second and third poles of the third transistor M2 are respectively the drain and the source of the third transistor M2 and are respectively connected to the third pole of the second transistor M1 and the first input end of the short circuit comparing unit 32, wherein if the second pole is the drain, the third pole is the source, and if the second pole is the source, the third pole is the drain.
The short circuit comparing unit 32 is a short circuit comparator scp_comp, a third electrode of the third transistor M2 is connected to a positive input terminal of the short circuit comparator scp_comp, a negative input terminal of the short circuit comparator scp_comp is connected to a third electrode of the first transistor M0, and the discharge voltage VSYS is sampled.
The size ratio of the first transistor M0 and the third transistor M2 is k2:1, the energy storage module provides a reference current, according to the size ratio of the first transistor M0 and the third transistor M2 and the reference current, an overcurrent protection threshold voltage vsns_scp is generated at the third electrode of the third transistor M2, an equivalent overcurrent protection threshold current i_scp is formed between the drain and the source of the first transistor M0, the positive input end of the short circuit comparator scp_comp obtains a short circuit protection threshold voltage vsns_scp at the third electrode of the third transistor M2, the short circuit comparator scp_comp compares the short circuit protection threshold voltage vsns_scp with a discharge voltage VSYS, and if the discharge voltage VSYS is lower than the short circuit protection threshold voltage vsns_scp, the short circuit comparator SCP outputs a logic high short circuit signal to indicate that the energy storage module is in short circuit.
According to the discharge detection circuit provided by the embodiment, the second transistor, the third transistor, the overcurrent comparator and the short-circuit comparator are utilized to form the overcurrent detection circuit and the short-circuit detection circuit, so that the overcurrent protection and the short-circuit protection are realized, meanwhile, the sampling and the detection of the overcurrent and the short-circuit current can be completed only through one branch, the power consumption of the discharge detection circuit is effectively reduced, the chip area is saved, and the low-power consumption design is realized.
Based on the discharge detection circuit provided by the embodiment, the embodiment of the utility model also provides a discharge circuit.
Referring to fig. 4, a schematic block diagram of a discharging circuit according to an embodiment of the present utility model is shown in fig. 4, wherein the discharging circuit 100 includes: the energy storage module 101 and the discharge detection circuit 102 provided in the foregoing embodiment, the energy storage module 101 is connected to the discharge module 10 in the discharge detection circuit 102.
In this embodiment, the energy storage module 101 and the discharge detection circuit 102 together form a discharge circuit, the energy storage module 101 discharges to the load through the discharge module 10 in the discharge detection circuit 102, the magnitude of the discharge current of the energy storage module 101 depends on the magnitude of the load, and in the process of discharging the energy storage module 101, the discharge detection circuit 102 performs over-current detection and short-circuit detection on the discharge current of the energy storage module 101, so as to avoid over-current or short-circuit fault of the energy storage module 101 in the process of discharging the load.
The specific implementation and detection principle of the discharge detection circuit 102 may refer to the above embodiments, and will not be described herein.
According to the discharging circuit provided by the embodiment, the overcurrent problem and the short circuit problem in the discharging process of the energy storage module are detected through the discharging detection circuit, the overcurrent fault and the short circuit fault of the discharging circuit are avoided, in the discharging detection process, the discharging detection circuit only realizes the overcurrent detection and the short circuit detection through one branch, the discharging detection power consumption of the discharging circuit can be effectively reduced, and the discharging circuit design with low power consumption is realized.
Based on the discharging circuit provided by the embodiment, the embodiment of the utility model also provides electronic equipment.
Referring to fig. 5, a schematic structural diagram of an electronic device according to an embodiment of the present utility model, as shown in fig. 5, the electronic device may include: the discharge circuit 100 and the load 200 provided in the above embodiment, the discharge detection circuit 102 in the discharge circuit 100 is connected to the load 200.
In this embodiment, the energy storage module 101 in the discharging circuit 100 is connected to the load 200 through the discharging detection circuit 102 to discharge to the load, and the discharging detection circuit 102 can perform overcurrent detection and short circuit detection on the discharging current of the energy storage module 101 in the discharging process of the energy storage module 101, so as to avoid the overcurrent or short circuit fault of the energy storage module 101 in the discharging process of the load.
The specific implementation and detection principle of the discharge detection circuit 102 may refer to the above embodiments, and will not be described herein.
A control chip or a control circuit is also arranged in the electronic equipment, and the energy storage module 101 is controlled to stop discharging according to the overcurrent signal or the short-circuit signal output by the discharge detection circuit 102, so that the safety of the electronic equipment is ensured.
According to the electronic equipment provided by the embodiment, the discharge detection circuit in the discharge circuit is used for detecting the overcurrent problem and the short circuit problem in the discharge process of the energy storage module, so that the overcurrent fault and the short circuit fault of the discharge circuit in the electronic equipment are avoided, and in the discharge detection process, the discharge detection circuit is used for realizing the overcurrent detection and the short circuit detection only through one branch, so that the discharge detection power consumption of the discharge circuit can be effectively reduced, and the design of the electronic equipment with low power consumption is realized.
The foregoing is merely illustrative of embodiments of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions can be easily made by those skilled in the art within the technical scope of the present utility model, and the present utility model is intended to be covered by the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (10)
1. A discharge detection circuit, the circuit comprising: the device comprises a discharge module, an overcurrent detection module and a short circuit detection module;
the input end of the discharging module is connected with the energy storage module, and the output end of the discharging module is connected with a load;
the first input end of the overcurrent detection module is connected with the energy storage module, the second input end of the overcurrent detection module is connected with the output end of the discharge module, and the output end of the overcurrent detection module is used for outputting an overcurrent signal;
the first input end of the short circuit detection module is connected with the reference end of the overcurrent detection module, the second input end of the short circuit detection module is connected with the output end of the discharge module, and the output end of the short circuit detection module is used for outputting a short circuit signal;
the reference end of the short circuit detection module is grounded through a reference current source.
2. The circuit of claim 1, wherein the over-current detection module comprises: an overcurrent threshold detection unit and an overcurrent comparison unit;
the first end of the overcurrent threshold detection unit is used as the first input end of the overcurrent detection module, the second end of the overcurrent threshold detection unit is connected with the first input end of the overcurrent comparison unit and used as the reference end of the overcurrent detection module, the second input end of the overcurrent comparison unit is used as the second input end of the overcurrent detection module, and the output end of the overcurrent comparison unit is used as the output end of the overcurrent detection module.
3. The circuit of claim 2, wherein the discharge module and the over-current threshold detection unit are transistors, and a dimensional ratio of the discharge module and the over-current threshold detection unit is a ratio of an over-current protection threshold current to a reference current of the reference current source.
4. The circuit of claim 3, wherein the discharge module comprises: a first transistor;
the first pole of the first transistor is connected with a preset bias power supply, the second pole of the first transistor is used as an input end of the discharging module, and the third pole of the first transistor is used as an output end of the discharging module.
5. The circuit of claim 3, wherein the over-current threshold detection unit comprises: a second transistor;
the first pole of the second transistor is connected with a preset bias power supply, the second pole of the second transistor is used as the first end of the overcurrent threshold detection unit, and the third pole of the second transistor is used as the second end of the overcurrent threshold detection unit.
6. The circuit of claim 1, wherein the short circuit detection module comprises: a short-circuit threshold detection unit and a short-circuit comparison unit;
the first end of the short-circuit threshold detection unit is used as the first input end of the short-circuit detection module, the second end of the short-circuit threshold detection unit is connected with the positive input end of the short-circuit comparison unit and used as the reference end of the short-circuit detection module, the negative input end of the short-circuit comparison unit is used as the second input end of the short-circuit detection module, and the output end of the short-circuit comparison unit is used as the output end of the short-circuit detection module.
7. The circuit of claim 6, wherein the discharge module and the short-circuit threshold detection unit are transistors, and wherein a size ratio of the discharge module and the short-circuit threshold detection unit is a ratio of a short-circuit protection threshold current to a reference current of the reference current source.
8. The circuit of claim 7, wherein the short threshold detection unit comprises: a third transistor;
the first pole of the third transistor is connected with a preset bias power supply, the second pole of the third transistor is used as the first end of the short-circuit threshold detection unit, and the third pole of the third transistor is used as the second end of the short-circuit threshold detection unit.
9. A discharge circuit, the discharge circuit comprising: an energy storage module and a discharge detection circuit according to any one of claims 1-8, said energy storage module being connected to a discharge module in said discharge detection circuit.
10. An electronic device, the electronic device comprising: the discharge circuit and load of claim 9; and a discharge detection circuit in the discharge circuit is connected with the load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320798889.7U CN220040591U (en) | 2023-04-12 | 2023-04-12 | Discharge detection circuit, discharge circuit, and electronic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320798889.7U CN220040591U (en) | 2023-04-12 | 2023-04-12 | Discharge detection circuit, discharge circuit, and electronic apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220040591U true CN220040591U (en) | 2023-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320798889.7U Active CN220040591U (en) | 2023-04-12 | 2023-04-12 | Discharge detection circuit, discharge circuit, and electronic apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220040591U (en) |
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2023
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