CN217385679U - Charger access detection circuit of same-port battery pack - Google Patents
Charger access detection circuit of same-port battery pack Download PDFInfo
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- CN217385679U CN217385679U CN202220530724.7U CN202220530724U CN217385679U CN 217385679 U CN217385679 U CN 217385679U CN 202220530724 U CN202220530724 U CN 202220530724U CN 217385679 U CN217385679 U CN 217385679U
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- battery pack
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- charger
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model relates to the technical field of detection circuits, and discloses a charger access detection circuit of a same-port battery pack, which comprises a sampling diode, a switch circuit and a controller; the negative electrode of the sampling diode is connected with the charge-discharge positive end of the same-port battery pack, and the positive electrode of the sampling diode is connected with the battery pack positive end; the first end of the switch circuit is connected to the positive end of the charge and discharge and the negative electrode of the sampling diode, the second end of the switch circuit is connected to the positive end of the battery pack and the positive electrode of the sampling diode, and the third end of the switch circuit is connected to the controller. The utility model discloses a sampling diode samples with the charge-discharge positive end of mouthful group battery, connects sampling diode and controller through switch circuit to can awaken up the controller when the charger inserts, make the controller can control and open charging circuit, realized the access detection of charger under the condition that effectively reduces the energy consumption.
Description
Technical Field
The utility model relates to a detection circuitry technical field especially relates to a charger of with mouthful group battery inserts detection circuitry.
Background
With the development of science and technology, lithium batteries become the mainstream of energy sources nowadays, and are applied to the field of automobiles nowadays.
At present, a detection circuit for charger access needs to be set for a lithium battery pack to realize charger access identification and wake up a charging and discharging circuit of a lithium battery after identifying charger access. In the prior art, in order to realize the charger access detection of the lithium battery pack, a detection circuit with an optocoupler relay is arranged on a battery management System (BMS for short) of the lithium battery pack, but the detection circuit needs higher energy consumption, and the duration of the lithium battery pack is easily shortened.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art, the utility model provides a with charger of mouth group battery inserts detection circuitry, it is higher to set up the detection circuitry energy consumption that the charger inserts to lithium cell group battery among the solution prior art, shortens the long problem of duration of lithium cell group battery easily.
In order to achieve the above object, the present invention provides the following technical solutions:
a charger access detection circuit of a same-port battery pack comprises a sampling diode, a switch circuit and a controller;
the negative electrode of the sampling diode is connected with the charge-discharge positive end of the same-port battery pack, and the positive electrode of the sampling diode is connected with the battery pack positive end;
the first end of the switch circuit is connected to the positive end of the charge and discharge and the negative electrode of the sampling diode, the second end of the switch circuit is connected to the positive end of the battery pack and the positive electrode of the sampling diode, and the third end of the switch circuit is connected to the controller.
Optionally, the second terminal of the switch circuit is connected to the positive terminal of the battery pack and the anode of the sampling diode through a first resistor.
Optionally, the switching circuit includes a first transistor and a second transistor;
the emitter of the first triode is connected to the positive charging and discharging terminal and the negative electrode of the sampling diode, the base of the first triode is connected to the positive battery pack terminal and the positive electrode of the sampling diode through the first resistor, and the collector of the first triode is connected to the base of the second triode;
and the collector electrode of the second triode is connected with the controller.
Optionally, a second resistor is connected between the collector of the first triode and the base of the second triode.
Optionally, a connection end of the collector of the second triode and the controller is connected with a power supply end.
Optionally, a third resistor is connected between the collector of the second triode and the power supply terminal.
Optionally, the voltage of the power supply terminal is 3.3V.
Optionally, an emitter of the second triode is grounded.
Optionally, one end of the controller connected to the switch circuit is further connected to a capacitor, and one end of the capacitor far away from the controller is grounded.
Optionally, the controller is a single chip microcomputer.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model provides a charger of mouthful group battery inserts detection circuitry samples the positive end of the charge-discharge of mouthful group battery through the sampling diode, connects sampling diode and controller through switch circuit to can awaken the controller up when the charger inserts, make the controller can control and open charging circuit, realized the access detection of charger under the condition of effectively reducing the energy consumption.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 inventive exercise.
Fig. 1 is the utility model provides a pair of with the charger of mouthful group battery insert detection circuitry's schematic structure view.
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.
In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Furthermore, the terms "long", "short", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have the specific orientation, operate in the specific orientation configuration, and thus, should not be construed as limiting the present invention.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
The embodiment of the utility model provides a with charger access detection circuitry of mouthful group battery has saved the optocoupler relay among the traditional charger access detection circuitry, can effectively reduce detection circuitry's energy consumption to the duration of a journey of extension group battery is long.
Referring to fig. 1, in the present embodiment, the charger access detection circuit of the same-port battery pack includes a sampling diode D1, a switch circuit, and a controller.
Specifically, the controller is a single chip microcomputer, and the MCU _ CHG _ W in fig. 1 is an input end of the controller, that is, an output signal of the switching circuit is used as a wake-up signal of the controller.
In this embodiment, the cathode of the sampling diode D1 is connected to the charge-discharge positive terminal P + of the same-port battery pack, and the anode of the sampling diode D1 is connected to the battery pack positive terminal B +;
it is understood that the charging and discharging positive terminals P + in the figure are a charging input positive terminal and a discharging output positive terminal.
The first end of the switch circuit is connected to the positive charging and discharging terminal P + and the negative electrode of the sampling diode D1, the second end of the switch circuit is connected to the positive battery pack terminal B + and the positive electrode of the sampling diode D1, and the third end of the switch circuit is connected to the controller.
Specifically, the second terminal of the switch circuit is connected to the positive terminal B + of the battery pack and the anode of the sampling diode D1 through a first resistor R3.
In this embodiment, the switching circuit includes a first transistor Q2 and a second transistor Q1;
specifically, the emitter of the first triode Q2 is connected to the positive charging and discharging terminal P + and the cathode of the sampling diode D1;
the base electrode of the first triode Q2 is connected with the positive end B + of the battery pack and the anode of the sampling diode D1 through a first resistor R3, and the collector electrode of the first triode Q2 is connected with the base electrode of the second triode Q1; the first resistor R3 provides bias voltage for the first triode Q2; the collector of the second triode Q1 is connected with the controller.
The series connection of the first transistor Q2 and the second transistor Q1 can make the adapted voltage range wider, thereby achieving the amplification effect.
Further, a second resistor R2 is connected between the collector of the first triode Q2 and the base of the second triode Q1; the second resistor R2 provides bias voltage for the first transistor Q2; the emitter of the second triode Q1 is grounded; in addition, the collector of the second transistor Q1 is connected to the common terminal of the controller with a power supply terminal.
Specifically, a third resistor R1, which is a pull-up resistor, is connected between the collector of the second transistor Q1 and the power supply terminal, and the controller is protected from the power supply leakage current to which it is connected.
In this embodiment, the voltage of the power source terminal is 3.3V.
Furthermore, one end of the controller connected to the switch circuit is also connected with a capacitor C1, and one end of the capacitor C1 far away from the controller is grounded; the capacitor C1 can function as a filter capacitor to filter out external interference.
Based on this, the utility model provides a detection circuitry's theory of operation as follows:
referring to fig. 1 again, when the charger is plugged in, the charging and discharging positive terminal P + is pulled high, the sampling diode D1 is reversely biased, the voltage of the charging and discharging positive terminal P + is higher than the voltage of the battery pack positive terminal B +, the first triode Q2 is turned on, the base of the second triode Q1 is at a high level, the second triode Q1 is turned on, and the voltage of the MCU _ CHG _ W is pulled low, so as to wake up the single chip microcomputer, and finally achieve the purpose of opening the charging circuit.
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 (10)
1. A charger access detection circuit of a same-port battery pack is characterized by comprising a sampling diode, a switching circuit and a controller;
the negative electrode of the sampling diode is connected with the charge-discharge positive end of the same-port battery pack, and the positive electrode of the sampling diode is connected with the battery pack positive end;
the first end of the switch circuit is connected with the positive charging and discharging end and the negative electrode of the sampling diode, the second end of the switch circuit is connected with the positive battery pack end and the positive electrode of the sampling diode, and the third end of the switch circuit is connected with the controller.
2. The circuit of claim 1, wherein the second terminal of the switch circuit is connected to the positive terminal of the battery pack and the positive terminal of the sampling diode through a first resistor.
3. The charger access detection circuit of the same-port battery pack as recited in claim 2, wherein the switching circuit comprises a first transistor and a second transistor;
the emitter of the first triode is connected to the positive charging and discharging terminal and the negative electrode of the sampling diode, the base of the first triode is connected to the positive battery pack terminal and the positive electrode of the sampling diode through the first resistor, and the collector of the first triode is connected to the base of the second triode;
and the collector electrode of the second triode is connected with the controller.
4. The circuit for detecting the access of a charger to a battery pack according to claim 3, wherein a second resistor is connected between the collector of the first transistor and the base of the second transistor.
5. The charger access detection circuit of claim 3, wherein a power supply terminal is connected to a connection terminal of the collector of the second transistor and the controller.
6. The circuit for detecting the access of a charger to a battery pack according to claim 5, wherein a third resistor is connected between the collector of the second transistor and the power supply terminal.
7. The charger access detection circuit of the same-port battery pack as claimed in claim 5, wherein the voltage of said power source terminal is 3.3V.
8. The circuit of claim 3, wherein the emitter of the second transistor is grounded.
9. The circuit for detecting the access of the charger to the battery pack of the same port as that of claim 1, wherein a capacitor is further connected to one end of the controller connected to the switch circuit, and one end of the capacitor far away from the controller is grounded.
10. The circuit for detecting access of a charger to a battery pack of the same port as that of claim 1, wherein the controller is a single chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220530724.7U CN217385679U (en) | 2022-03-10 | 2022-03-10 | Charger access detection circuit of same-port battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220530724.7U CN217385679U (en) | 2022-03-10 | 2022-03-10 | Charger access detection circuit of same-port battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217385679U true CN217385679U (en) | 2022-09-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220530724.7U Active CN217385679U (en) | 2022-03-10 | 2022-03-10 | Charger access detection circuit of same-port battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217385679U (en) |
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2022
- 2022-03-10 CN CN202220530724.7U patent/CN217385679U/en active Active
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