CN213149196U - Battery access detection circuit - Google Patents
Battery access detection circuit Download PDFInfo
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- CN213149196U CN213149196U CN202021778506.2U CN202021778506U CN213149196U CN 213149196 U CN213149196 U CN 213149196U CN 202021778506 U CN202021778506 U CN 202021778506U CN 213149196 U CN213149196 U CN 213149196U
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- limiting resistor
- current limiting
- terminal
- battery pack
- optical coupler
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Abstract
The utility model discloses a battery access detection circuit, include: the socket is provided with a first wiring terminal and a second wiring terminal, and the first wiring terminal and the second wiring terminal are respectively connected with two ends of the battery pack switch; the first current limiting resistor is connected with the first terminal; the positive electrode of the optical coupler is connected with the first current-limiting resistor, and the emitting electrode of the optical coupler is connected with the common end; the second current limiting resistor is connected with the second terminal and the negative electrode of the optocoupler; the third current limiting resistor is connected with a collector of the optocoupler and connected with the anode of the direct current power supply; and the central processing unit is connected with a collector of the optical coupler and is also electrically connected with an audible and visual alarm. The embodiment of the utility model provides a pair of battery access detection circuitry, circuit structure is simple, with low costs, can in time whether the early warning group battery inserts, reduces maintenance duration, and convenience of customers uses.
Description
Technical Field
The utility model belongs to the technical field of detect, especially, relate to a battery access detection circuit.
Background
A UPS (Uninterruptible Power Supply) is a system device that is provided to solve the problem of Uninterruptible Power Supply, and connects a battery pack to a host and converts direct current Power into commercial Power through a module circuit such as a host inverter. The power supply device is mainly used for providing stable and uninterrupted power supply for a single computer, a computer network system or other power electronic equipment, and has three basic functions of voltage stabilization, filtering and uninterrupted power supply. EPS (Emergency Power Supply) is an Emergency Power source used for Emergency lighting, and fire fighting equipment in important buildings. The emergency power supply system mainly comprises an input unit, an output unit, a charging module, a battery pack, an inverter, a monitor, an output switching device and the like, and can provide emergency power supply in an emergency state.
Referring to fig. 1, fig. 1 is a circuit diagram of an inverter operating circuit provided in the prior art, which can be applied to a UPS and an EPS power system. In order to ensure that the UPS and the EPS power system can work normally, whether the battery pack U is connected to the inverter S or not needs to be detected in real time, and when the battery pack U is not connected to the inverter S, early warning needs to be carried out in time. However, the early warning measures provided by the prior art have complex circuit structures and higher cost, so that the conventional UPS and EPS power supply systems are not provided with the early warning measures, and therefore early warning cannot be given to the access of the battery pack U.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a battery inserts detection circuitry, whether not only can the real-time detection group battery insert the dc-to-ac converter, circuit structure is simple, low cost moreover.
To achieve the purpose, the utility model adopts the following technical proposal:
a battery access detection circuit, comprising:
the socket is provided with a first wiring terminal and a second wiring terminal, and the first wiring terminal and the second wiring terminal are respectively connected with two ends of the battery pack switch;
a first current limiting resistor, a first end of the first current limiting resistor being connected to the first terminal;
the optical coupler is provided with a positive electrode, a negative electrode, a collector electrode and an emitter electrode, the positive electrode of the optical coupler is connected with the second end of the first current-limiting resistor, and the emitter electrode of the optical coupler is connected with a common end;
a first end of the second current limiting resistor is connected with the second terminal, and a second end of the second current limiting resistor is connected with a negative electrode of the optocoupler;
a first end of the third current limiting resistor is connected with a collector of the optocoupler, and a second end of the third current limiting resistor is connected with the anode of the direct-current power supply;
and the central processing unit is connected with the collector electrode of the optical coupler, and is also electrically connected with an audible and visual alarm, and the central processing unit is used for controlling the audible and visual alarm to work and stop according to the level of the collector electrode of the optical coupler.
As an optional technical scheme of the utility model, one end of the battery pack switch is connected with the anode of the battery pack, the other end of the battery pack switch is connected with one end of the fuse, and a BUS BUS capacitor is connected between the other end of the fuse and the cathode of the battery pack;
the first terminal is connected with the anode of the battery pack, and the second terminal is connected with the anode of the BUS BUS capacitor.
As an optional technical proposal of the utility model, the BUS BUS capacitor is an electrolytic capacitor.
As an optional technical scheme of the utility model, first current-limiting resistor is the series-parallel combination of single resistance or two above resistances, second current-limiting resistor is the series-parallel combination of single resistance or two above resistances, third current-limiting resistor is the series-parallel combination of single resistance or two above resistances.
As an optional technical solution of the present invention, the first current limiting resistor, the second current limiting resistor and the third current limiting resistor have a resistance of 100k Ω, 100k Ω and 20k Ω, respectively.
As an optional technical solution of the present invention, the positive voltage of the dc power supply is 5V, and the voltage of the common terminal is 0V.
Compared with the prior art, the embodiment of the utility model provides a following beneficial effect has:
this detection circuitry is inserted with the group battery switch through the socket, and when the group battery switch closed, the voltage of first wiring end and second wiring end equals for the anodal and the negative pole voltage of opto-coupler equal, and the opto-coupler does not switch on, and the level of collecting electrode is the high level, and central processing unit is according to this collecting electrode high level state, judges that the group battery switch is closed, also judges that the group battery has inserted the dc-to-ac converter, thereby control audible-visual annunciator stops. When the group battery switch disconnection, the voltage inequality of first wiring end and second wiring end for the positive pole and the negative pole voltage inequality of opto-coupler, the opto-coupler switches on, and the level of collecting electrode is drawn down and is the low level, and central processing unit judges the disconnection of group battery switch according to this collecting electrode is low level state, also judges that the group battery does not insert the dc-to-ac converter, thereby control audible-visual annunciator work to and the early warning in time.
The embodiment of the utility model provides a pair of battery access detection circuitry, circuit structure is simple, with low costs, can in time whether the early warning group battery inserts, reduces maintenance duration, and convenience of customers uses.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the range which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is a circuit diagram of an inverter according to the prior art;
fig. 2 is a circuit diagram of a battery access detection circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention are clearly and completely described with reference to the drawings in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1 and fig. 2, the present embodiment provides a battery access detection circuit, which can be applied to a UPS and an EPS power system for detecting whether a battery pack U is connected to an inverter S.
Specifically, the inverter operating circuit includes a battery pack U, a battery pack switch K1, a fuse FU, a BUS capacitor C, and an inverter S. The on and off of the battery pack switch K1 controls whether the battery pack U is connected to the inverter S. Fuse FU is used to prevent circuit current from being too large. The BUS BUS capacitor C is used for voltage stabilization and filtering. The inverter S is used to convert the dc voltage of the battery pack U into an ac voltage.
Specifically, the battery access detection circuit provided in this embodiment includes:
the socket J1 is characterized in that the socket J1 is provided with a first terminal 11 and a second terminal 12, and the first terminal 11 and the second terminal 12 are respectively connected with two ends of a battery pack switch K1; specifically, one end of a battery pack switch K1 is connected with the anode of a battery pack U, the other end of the battery pack switch K1 is connected with one end of a fuse FU, and a BUS BUS capacitor C is connected between the other end of the fuse FU and the cathode of the battery pack U; a first terminal 11 is connected with the anode of the battery pack U, and a second terminal 12 is connected with the anode of a BUS BUS capacitor C; the overcurrent protection function of the fuse FU not only protects the working circuit of the inverter S, but also protects the detection circuit;
a first current limiting resistor R1, a first end of the first current limiting resistor R1 being connected to the first terminal 11;
the optical coupler U1 is characterized in that the optical coupler U1 is provided with a positive electrode 1, a negative electrode 2, a collector 4 and an emitter 3, the positive electrode 1 of the optical coupler U1 is connected with the second end of the first current-limiting resistor R1, and the emitter 3 of the optical coupler U1 is connected with a common end GND;
a first end of a second current limiting resistor R2, a first end of the second current limiting resistor R2 is connected with the second terminal 12, and a second end of the second current limiting resistor R2 is connected with the negative electrode 2 of the optocoupler U1;
a first end of a third current limiting resistor R3, a first end of a third current limiting resistor R3 is connected with a collector 4 of the optocoupler U1, and a second end of the third current limiting resistor R3 is connected with the anode of the direct-current power supply VCC;
and the central processing unit CPU is connected with the collector 4 of the optocoupler U1 and is also electrically connected with an audible and visual alarm, and the central processing unit CPU is used for controlling the audible and visual alarm to work and stop according to the level of the collector 4 of the optocoupler U1.
In this embodiment, the resistances of the first current limiting resistor R1, the second current limiting resistor R2, and the third current limiting resistor R3 are 100k Ω, and 20k Ω, respectively. The voltage of the positive electrode of the direct-current power supply VCC is 5V, and the voltage of the common terminal GND is 0V.
The working principle of the embodiment is as follows:
when the battery pack switch K1 is closed, because the resistance of the fuse FU is very small, the voltages (approximate) of the first terminal 11 and the second terminal 12 are equal, so that the voltages (approximate) of the anode 1 and the cathode 2 of the optical coupler U1 are equal, the optical coupler U1 is not conducted, the level of the collector 4 is high level, the central processing unit CPU judges that the battery pack switch K1 is closed according to the fact that the collector 4 is in a high level state, namely, the battery pack U is judged to be connected with the inverter S, and the audible and visual alarm is controlled to stop.
When the battery pack switch K1 is disconnected, the voltages of the first terminal 11 and the second terminal 12 are not equal, so that the voltages of the anode 1 and the cathode 2 of the optical coupler U1 are not equal, a voltage difference exists, the optical coupler U1 is switched on, the level of the collector 4 is pulled down to be a low level, the CPU judges that the battery pack switch K1 is disconnected according to the low level state of the collector 4, namely, the battery pack U is judged not to be connected with the inverter S, the audible and visual alarm is controlled to work, and early warning is timely sent out.
As an optional manner of this embodiment, the first current limiting resistor R1 is a single resistor or a series-parallel combination of two or more resistors, the second current limiting resistor R2 is a single resistor or a series-parallel combination of two or more resistors, and the third current limiting resistor R3 is a single resistor or a series-parallel combination of two or more resistors.
The embodiment of the utility model provides a pair of battery access detection circuitry, circuit structure is simple, with low costs, can in time whether the early warning group battery U inserts, reduces maintenance duration, and convenience of customers uses.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (6)
1. A battery access detection circuit, comprising:
the socket is provided with a first wiring terminal and a second wiring terminal, and the first wiring terminal and the second wiring terminal are respectively connected with two ends of the battery pack switch;
a first current limiting resistor, a first end of the first current limiting resistor being connected to the first terminal;
the optical coupler is provided with a positive electrode, a negative electrode, a collector electrode and an emitter electrode, the positive electrode of the optical coupler is connected with the second end of the first current-limiting resistor, and the emitter electrode of the optical coupler is connected with a common end;
a first end of the second current limiting resistor is connected with the second terminal, and a second end of the second current limiting resistor is connected with a negative electrode of the optocoupler;
a first end of the third current limiting resistor is connected with a collector of the optocoupler, and a second end of the third current limiting resistor is connected with the anode of the direct-current power supply;
and the central processing unit is connected with the collector electrode of the optical coupler, and is also electrically connected with an audible and visual alarm, and the central processing unit is used for controlling the audible and visual alarm to work and stop according to the level of the collector electrode of the optical coupler.
2. The battery access detection circuit of claim 1, wherein:
one end of the battery pack switch is connected with the anode of the battery pack, the other end of the battery pack switch is connected with one end of the fuse, and a BUS BUS capacitor is connected between the other end of the fuse and the cathode of the battery pack;
the first terminal is connected with the anode of the battery pack, and the second terminal is connected with the anode of the BUS BUS capacitor.
3. The battery access detection circuit of claim 2, wherein:
the BUS BUS capacitor is an electrolytic capacitor.
4. The battery access detection circuit of claim 1, wherein:
the first current limiting resistor is a single resistor or a series-parallel combination of more than two resistors, the second current limiting resistor is a single resistor or a series-parallel combination of more than two resistors, and the third current limiting resistor is a single resistor or a series-parallel combination of more than two resistors.
5. The battery access detection circuit of claim 1, wherein:
the resistance values of the first current limiting resistor, the second current limiting resistor and the third current limiting resistor are 100k omega, 100k omega and 20k omega respectively.
6. The battery access detection circuit of claim 1, wherein:
the voltage of the positive pole of the direct current power supply is 5V, and the voltage of the common end is 0V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021778506.2U CN213149196U (en) | 2020-08-24 | 2020-08-24 | Battery access detection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021778506.2U CN213149196U (en) | 2020-08-24 | 2020-08-24 | Battery access detection circuit |
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| CN213149196U true CN213149196U (en) | 2021-05-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023123955A1 (en) * | 2021-12-30 | 2023-07-06 | 广东高标电子科技有限公司 | Battery pack connection detection apparatus and method, and electric vehicle |
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- 2020-08-24 CN CN202021778506.2U patent/CN213149196U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023123955A1 (en) * | 2021-12-30 | 2023-07-06 | 广东高标电子科技有限公司 | Battery pack connection detection apparatus and method, and electric vehicle |
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