CN217720775U - Charging self-display circuit and battery pack - Google Patents
Charging self-display circuit and battery pack Download PDFInfo
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- CN217720775U CN217720775U CN202221456546.4U CN202221456546U CN217720775U CN 217720775 U CN217720775 U CN 217720775U CN 202221456546 U CN202221456546 U CN 202221456546U CN 217720775 U CN217720775 U CN 217720775U
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Abstract
The application provides a self-display charging circuit and a battery pack. The charging self-display circuit comprises a charging detection comparator and a display circuit; the display circuit comprises a self-display electronic switching tube, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor, wherein the control end of the self-display electronic switching tube is connected with the comparison output end of the charging detection comparator; the second end of the first resistor is also connected with the first comparison end of the charging detection comparator; the comparison output end of the charging detection comparator is connected with the first end of the third resistor, and the second end of the third resistor is connected with the second comparison end of the charging detection comparator; and the grounding end of the charging detection comparator is connected with the first end of the fifth resistor. When a battery charging signal exists, the first comparison end and the second comparison end have voltage difference, the self-display electronic switch tube is switched from cut-off to conduction, the input end of the display controller receives detection current, the display controller is convenient to trigger, and the current charging electric quantity of the battery is displayed in real time.
Description
Technical Field
The utility model relates to a battery technology field especially relates to a charge from showing circuit and battery package.
Background
At present, the pure hardware lithium battery protection board scheme is generally adopted to display electric quantity through an LED, for example, the LED display is carried out by judging the voltage of a battery pack, the active display cannot be carried out, and the power supply display is carried out through a switch key so as to meet the requirement of low power consumption of the protection board.
However, if a user inserts the charger, the battery cannot actively display the charging lamp display, the user needs to press the switch button to observe the charging lamp display, the time displayed by the lamp panel is short, the charging real-time state cannot be displayed, and the user cannot know whether the battery is in a fast-charging state or not.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the weak point among the prior art, provide a it is convenient for show charging self-displaying circuit and battery package of electric quantity that charges in real time.
The purpose of the utility model is realized through the following technical scheme:
a charging self-display circuit comprising: a charge detection comparator and a display circuit; the display circuit comprises a self-display electronic switch tube, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor, wherein the first end of the self-display electronic switch tube is used for being connected with the input end of a display controller, the second end of the self-display electronic switch tube is grounded, the control end of the self-display electronic switch tube is connected with the comparison output end of the charging detection comparator, and the display controller is used for displaying the current charging capacity of the battery; the first end of the first resistor is used for being connected with a power supply, the power supply is also connected with the power supply end of the charging detection comparator, the second end of the first resistor is connected with the grounding end of the charging detection comparator through the second resistor, and the second end of the first resistor is also connected with the first comparison end of the charging detection comparator; the comparison output end of the charging detection comparator is connected with the first end of the third resistor, the second end of the third resistor is connected with the second comparison end of the charging detection comparator, and the second end of the third resistor is grounded through the fourth resistor; the ground terminal of the charging detection comparator is connected with the first terminal of the fifth resistor, the second terminal of the fifth resistor is grounded, and the first terminal of the fifth resistor is used for receiving a battery charging signal.
In one embodiment, the display circuit further comprises a sixth resistor, a first end of the sixth resistor is connected with the comparison output end of the charge detection comparator, and a second end of the sixth resistor is connected with the control end of the self-display electronic switch tube.
In one embodiment, the display circuit further includes a seventh resistor, a second terminal of the sixth resistor is connected to a first terminal of the seventh resistor, and a second terminal of the seventh resistor is grounded.
In one embodiment, the display circuit further comprises a current-limiting diode, an anode of the current-limiting diode is connected with the input end of the display controller, and a cathode of the current-limiting diode is connected with the first end of the self-display electronic switching tube.
In one embodiment, the display circuit further includes an eighth resistor, a first end of the eighth resistor is connected to the input terminal of the display controller, and a second end of the eighth resistor is connected to the anode of the current-limiting diode.
In one embodiment, the self-display electronic switch tube is an N-type MOS tube, the second terminal of the first resistor is connected to the inverting comparison terminal of the charge detection comparator, and the second terminal of the third resistor is connected to the non-inverting comparison terminal of the charge detection comparator.
In one embodiment, the self-display electronic switch tube is a P-type MOS tube, the second terminal of the first resistor is connected to the positive comparison terminal of the charge detection comparator, and the second terminal of the third resistor is connected to the negative comparison terminal of the charge detection comparator.
In one embodiment, the display circuit further includes a filter capacitor, a power supply terminal of the charging detection comparator is connected to a first terminal of the filter capacitor, and a second terminal of the filter capacitor is connected to a ground terminal of the charging detection comparator.
In one embodiment, at least one of the first resistor, the second resistor, the third resistor, and the fourth resistor is a variable resistor.
A battery pack comprising the self-display charging circuit according to any of the above embodiments.
Compared with the prior art, the utility model discloses at least, following advantage has:
when there is the battery charge signal, first comparison end has the voltage difference with the comparison of second end for turn on by cutting off the change into from showing electronic switch pipe, thereby make display controller's input receive the measuring current, be convenient for trigger display controller, thereby be convenient for display controller shows the current electric quantity that charges of battery, realize the real-time display to the current electric quantity that charges of battery when charging.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a circuit diagram of a charging self-displaying circuit in an embodiment;
FIG. 2 is a circuit diagram of a charging self-display circuit in another embodiment.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are illustrated in the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. 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. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.
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 invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The utility model relates to a charge from showing circuit. In one embodiment, the charging self-display circuit comprises a charging detection comparator and a display circuit. The display circuit comprises a self-display electronic switching tube, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor. The first end of the self-display electronic switch tube is used for being connected with the input end of the display controller, the second end of the self-display electronic switch tube is grounded, and the control end of the self-display electronic switch tube is connected with the comparison output end of the charging detection comparator. The display controller is used for displaying the current charging capacity of the battery. The first end of the first resistor is used for being connected with a power supply, and the power supply is further connected with the power supply end of the charging detection comparator. The second end of the first resistor is connected with the grounding end of the charging detection comparator through the second resistor, and the second end of the first resistor is also connected with the first comparison end of the charging detection comparator. The comparison output end of the charging detection comparator is connected with the first end of the third resistor, the second end of the third resistor is connected with the second comparison end of the charging detection comparator, and the second end of the third resistor is grounded through the fourth resistor. The ground terminal of the charging detection comparator is connected with the first end of the fifth resistor, the second end of the fifth resistor is grounded, and the first end of the fifth resistor is used for receiving a battery charging signal. When there is the battery charge signal, first comparison end has the voltage difference with the comparison of second end for turn on by cutting off the change into from showing electronic switch pipe, thereby make display controller's input receive the measuring current, be convenient for trigger display controller, thereby be convenient for display controller shows the current electric quantity that charges of battery, realize the real-time display to the current electric quantity that charges of battery when charging.
Please refer to fig. 1, which is a circuit diagram of a charging self-displaying circuit according to an embodiment of the present invention.
The charging self-display circuit 10 of an embodiment includes a charging detection comparator UK1 and a display circuit. The display circuit comprises a self-display electronic switch tube MK1, a first resistor RK4, a second resistor RK6, a third resistor RK5, a fourth resistor RK7 and a fifth resistor RK9. The first end of the self-display electronic switch tube MK1 is used for being connected with the input end LED _ CTLD of the display controller, the second end of the self-display electronic switch tube MK1 is grounded, and the control end of the self-display electronic switch tube MK1 is connected with the comparison output end of the charging detection comparator UK 1. The display controller is used for displaying the current charging capacity of the battery. The first end of the first resistor RK4 is used for being connected with a power supply VCC, and the power supply VCC is also connected with the power supply end of the charging detection comparator UK 1. The second end of the first resistor RK4 is connected to the ground terminal of the charging detection comparator UK1 through the second resistor RK6, and the second end of the first resistor RK4 is further connected to the first comparison end of the charging detection comparator UK 1. The comparison output end of the charging detection comparator UK1 is connected with the first end of the third resistor RK5, the second end of the third resistor RK5 is connected with the second comparison end of the charging detection comparator UK1, and the second end of the third resistor RK5 is grounded through the fourth resistor RK 7. The ground terminal of the charging detection comparator UK1 is connected to the first end of the fifth resistor RK9, the second end of the fifth resistor RK9 is grounded, and the first end of the fifth resistor RK9 is configured to receive a battery charging signal.
In this embodiment, when there is a battery charging signal, there is a voltage difference between the first comparing terminal and the second comparing terminal, so that the self-display electronic switch tube MK1 is turned on from off, and the input end LED _ CTLD of the display controller receives the detection current, which is convenient for triggering the display controller, and therefore the display controller is convenient for displaying the current charging capacity of the battery, and real-time display of the current charging capacity of the battery is realized during charging. At least one of the first resistor RK4, the second resistor RK6, the third resistor RK5, and the fourth resistor RK7 is a variable resistor, which facilitates adjustment of a voltage comparison difference between two comparison terminals of the charging detection comparator UK1, thereby facilitating adjustment of a charging signal, such as a charging current, acquired when displaying an electric quantity of a battery. Moreover, the third resistor RK5 is used as an output feedback resistor of the charging detection comparator UK1 to ensure that the output voltage of the charging detection comparator UK1 is fed back when there is a charging current and when there is no charging current, so that the voltage at the second comparison end of the charging detection comparator UK1 is changed, thereby ensuring that a voltage comparison is formed.
In one embodiment, please refer to fig. 1, the display circuit further includes a sixth resistor RK3, a first end of the sixth resistor RK3 is connected to the comparison output terminal of the charge detection comparator UK1, and a second end of the sixth resistor RK3 is connected to the control terminal of the self-display electronic switch MK 1. In this embodiment, the sixth resistor RK3 is located between the charging detection comparator UK1 and the self-displaying electronic switch tube MK1, specifically, the sixth resistor RK3 is connected in series between an output end of the charging detection comparator UK1 and a control end of the self-displaying electronic switch tube MK1, and the sixth resistor RK3 limits an electrical signal output by the charging detection comparator UK1, so that a detection voltage output by the charging detection comparator UK1 is partially loaded on the sixth resistor RK3, which is convenient for limiting a current flowing into the control end of the self-displaying electronic switch tube MK1, so as to avoid an excessive input current at the control end of the self-displaying electronic switch tube MK1, and ensure that the self-displaying electronic switch tube MK1 normally operates.
Further, referring to fig. 1, the display circuit further includes a seventh resistor RK2, a second end of the sixth resistor RK3 is connected to a first end of the seventh resistor RK2, and a second end of the seventh resistor RK2 is grounded. In this embodiment, one end of the seventh resistor RK2 is connected to the control end of the self-displaying electronic switch tube MK1, and the other end of the seventh resistor RK2 is connected to the second end of the self-displaying electronic switch tube MK1, specifically, the seventh resistor RK2 is connected in parallel between the gate and the source of the self-displaying electronic switch tube MK 1. The seventh resistor RK2 is used as a gate-source bias resistor of the self-displaying electronic switch tube MK1, so that a current flowing into the control end of the self-displaying electronic switch tube MK1 can be conveniently shunted, the current flowing into the control end of the self-displaying electronic switch tube MK1 can be reduced under the condition that the self-displaying electronic switch tube MK1 is ensured to be rapidly switched on, and the probability of damage to the self-displaying electronic switch tube MK1 is further effectively reduced. Moreover, the seventh resistor RK2 is connected in series with the sixth resistor RK3, the voltage at the control end of the self-development electronic switch tube MK1 is the voltage across the seventh resistor RK2, that is, the seventh resistor RK2 and the sixth resistor RK3 form a voltage dividing circuit, so as to provide a corresponding on-state voltage for the control end of the self-development electronic switch tube MK 1.
In one embodiment, referring to fig. 1, the display circuit further includes a current limiting diode DK1, an anode of the current limiting diode DK1 is connected to the input end LED _ CTLD of the display controller, and a cathode of the current limiting diode DK1 is connected to the first end of the self-display electronic switch MK 1. In this embodiment, the current limiting diode DK1 is connected in series to the first end of the self-displaying electronic switch tube MK1, and the current limiting diode DK1 unidirectionally guides the current of the input end LED _ CTLD of the display controller, so that when the self-displaying electronic switch tube MK1 is turned on, the voltage of the input end LED _ CTLD of the display controller is pulled low, so that the voltage of the input end LED _ CTLD of the display controller changes, thereby reducing the probability that the current generated when the self-displaying electronic switch tube MK1 is turned off flows to the input end LED _ CTLD of the display controller, that is, reducing the power display performed when no charge occurs, and reducing the power display time error.
Further, referring to fig. 1, the display circuit further includes an eighth resistor RK1, a first end of the eighth resistor RK1 is connected to the input end LED _ CTLD of the display controller, and a second end of the eighth resistor RK1 is connected to an anode of the current-limiting diode DK 1. In this embodiment, the eighth resistor RK1 is located between the current limiting diode DK1 and the display controller, and specifically, the eighth resistor RK1 is connected in series between the anode of the current limiting diode DK1 and the input end LED _ CTLD of the display controller. The eighth resistor RK1 limits the detection current of the input end LED _ CTLD of the display controller to reduce the current of the input end LED _ CTLD of the display controller and avoid the overlarge current of the input end LED _ CTLD of the display controller, and the eighth resistor RK1 pulls up the voltage of the input end LED _ CTLD of the display controller, so that the voltage of the input end LED _ CTLD of the display controller is increased, the display controller can accurately obtain the detection voltage, and the display controller can timely display the electric quantity.
In one embodiment, referring to fig. 1, the self-display electronic switch MK1 is an N-type MOS transistor, the second terminal of the first resistor RK4 is connected to the inverting comparison terminal of the charge detection comparator UK1, and the second terminal of the third resistor RK5 is connected to the non-inverting comparison terminal of the charge detection comparator UK 1. In this embodiment, the first end of the self-displaying electronic switch tube MK1 is a drain of the N-type MOS transistor, the second end of the self-displaying electronic switch tube MK1 is a source of the N-type MOS transistor, the control end of the self-displaying electronic switch tube MK1 is a gate of the N-type MOS transistor, and the self-displaying electronic switch tube MK1 is turned on at a high level. When the battery is charged, the charging voltage loaded on the fifth resistor RK9 is input to the positive phase comparison end of the charging detection comparator UK1 through the fourth resistor RK7, at this time, the voltage of the positive phase comparison end of the charging detection comparator UK1 is increased, and the voltage of the positive phase comparison end of the charging detection comparator UK1 is greater than the voltage of the negative phase comparison end of the charging detection comparator UK1, so that the comparison output end of the charging detection comparator UK1 outputs a high level, and the self-display electronic switch tube MK1 is switched from off to on, so that the display controller receives a voltage change, and the display controller is triggered to display the current charging electric quantity of the battery, and further, the electric quantity of the battery is displayed in real time when the battery is charged.
In one embodiment, referring to fig. 2, the self-display electronic switch MK1 is a P-type MOS transistor, the second terminal of the first resistor RK4 is connected to the positive-phase comparison terminal of the charge detection comparator UK1, and the second terminal of the third resistor RK5 is connected to the negative-phase comparison terminal of the charge detection comparator UK 1. In this embodiment, the first end of the self-displaying electronic switch tube MK1 is the source of the P-type MOS transistor, the second end of the self-displaying electronic switch tube MK1 is the drain of the P-type MOS transistor, the control end of the self-displaying electronic switch tube MK1 is the gate of the P-type MOS transistor, and the self-displaying electronic switch tube MK1 is turned on at a low level. When the battery is charged, the charging voltage loaded on the fifth resistor RK9 is input to the inverting comparison end of the charging detection comparator UK1 through the fourth resistor RK7, at this time, the voltage at the inverting comparison end of the charging detection comparator UK1 is increased, and the voltage at the inverting comparison end of the charging detection comparator UK1 is greater than the voltage at the non-inverting comparison end of the charging detection comparator UK1, so that the comparison output end of the charging detection comparator UK1 outputs a low level, and the self-display electronic switch tube MK1 is switched from off to on, so that the display controller receives the voltage change, and the display controller is triggered to display the current charging electric quantity of the battery, and the electric quantity of the battery is displayed in real time when the battery is charged.
In one embodiment, referring to fig. 1, the display circuit further includes a filter capacitor CK1, a power supply terminal of the charging detection comparator UK1 is connected to a first terminal of the filter capacitor CK1, and a second terminal of the filter capacitor CK1 is connected to a ground terminal of the charging detection comparator UK 1. In this embodiment, the power supply terminal of the charging detection comparator UK1 is connected to the power supply VCC, and the power supply VCC provides a working reference voltage for the charging detection comparator UK1 and also provides a divided voltage for the second resistor RK6, that is, the first comparison terminal of the charging detection comparator UK1 provides a comparison voltage, so as to be convenient for performing voltage comparison with the second comparison terminal of the charging detection comparator UK1, thereby facilitating performing difference comparison on the voltage in the charging state, and further facilitating determining to control the display controller to display the current charging capacity of the battery in real time during charging. Like this, it is right to connect on the power supply end of charge detection comparator UK1 filter capacitor CK1 the voltage of power supply VCC output carries out filtering, provides stable direct current voltage signal, ensures power supply VCC does charge detection comparator UK 1's first comparison end provides stable partial pressure to it is stable to ensure the comparison reference voltage who provides when carrying out the voltage comparison.
In one embodiment, the present application further provides a battery pack including the charging self-display circuit described in any of the above embodiments. In this embodiment, the charging self-display circuit includes a charging detection comparator and a display circuit. The display circuit comprises a self-display electronic switching tube, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor. The first end of the self-display electronic switch tube is used for being connected with the input end of the display controller, the second end of the self-display electronic switch tube is grounded, and the control end of the self-display electronic switch tube is connected with the comparison output end of the charging detection comparator. The display controller is used for displaying the current charging capacity of the battery. The first end of the first resistor is used for being connected with a power supply, and the power supply is further connected with the power supply end of the charging detection comparator. The second end of the first resistor is connected with the grounding end of the charging detection comparator through the second resistor, and the second end of the first resistor is also connected with the first comparison end of the charging detection comparator. The comparison output end of the charging detection comparator is connected with the first end of the third resistor, the second end of the third resistor is connected with the second comparison end of the charging detection comparator, and the second end of the third resistor is grounded through the fourth resistor. The ground terminal of the charging detection comparator is connected with the first end of the fifth resistor, the second end of the fifth resistor is grounded, and the first end of the fifth resistor is used for receiving a battery charging signal. When having the battery charge signal, there is the voltage difference first comparison end and second comparison end for turn on by cutting off to change into from showing electronic switch tube, thereby make display controller's input receive the testing current, be convenient for trigger display controller, thereby be convenient for display controller shows the current electric quantity that charges of battery, realize the real-time demonstration to the current electric quantity that charges of battery when charging.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A charging self-display circuit, comprising:
a charge detection comparator for comparing the detected charge with a reference voltage,
the display circuit comprises a self-display electronic switching tube, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor, wherein the first end of the self-display electronic switching tube is used for being connected with the input end of a display controller, the second end of the self-display electronic switching tube is grounded, the control end of the self-display electronic switching tube is connected with the comparison output end of the charging detection comparator, and the display controller is used for displaying the current charging capacity of the battery; the first end of the first resistor is used for being connected with a power supply, the power supply is also connected with the power supply end of the charging detection comparator, the second end of the first resistor is connected with the grounding end of the charging detection comparator through the second resistor, and the second end of the first resistor is also connected with the first comparison end of the charging detection comparator; the comparison output end of the charging detection comparator is connected with the first end of the third resistor, the second end of the third resistor is connected with the second comparison end of the charging detection comparator, and the second end of the third resistor is grounded through the fourth resistor; the ground terminal of the charging detection comparator is connected with the first end of the fifth resistor, the second end of the fifth resistor is grounded, and the first end of the fifth resistor is used for receiving a battery charging signal.
2. The charging self-display circuit of claim 1, wherein the display circuit further comprises a sixth resistor, a first end of the sixth resistor is connected to the comparison output end of the charging detection comparator, and a second end of the sixth resistor is connected to the control end of the self-display electronic switch tube.
3. The charging self-display circuit of claim 2, wherein the display circuit further comprises a seventh resistor, a second terminal of the sixth resistor is connected to a first terminal of the seventh resistor, and a second terminal of the seventh resistor is connected to ground.
4. The charging self-display circuit of claim 1, wherein the display circuit further comprises a current limiting diode, an anode of the current limiting diode is connected with the input terminal of the display controller, and a cathode of the current limiting diode is connected with the first end of the self-display electronic switching tube.
5. The charging self-display circuit of claim 4, wherein the display circuit further comprises an eighth resistor, a first end of the eighth resistor is connected to the input terminal of the display controller, and a second end of the eighth resistor is connected to the anode of the current-limiting diode.
6. The charging self-display circuit according to claim 1, wherein the self-display electronic switch is an N-type MOS transistor, the second terminal of the first resistor is connected to the inverting comparison terminal of the charging detection comparator, and the second terminal of the third resistor is connected to the non-inverting comparison terminal of the charging detection comparator.
7. The charging self-display circuit according to claim 1, wherein the self-display electronic switch is a P-type MOS transistor, the second terminal of the first resistor is connected to the positive comparison terminal of the charging detection comparator, and the second terminal of the third resistor is connected to the negative comparison terminal of the charging detection comparator.
8. The charging self-display circuit of claim 1, wherein the display circuit further comprises a filter capacitor, a power supply terminal of the charging detection comparator is connected to a first terminal of the filter capacitor, and a second terminal of the filter capacitor is connected to a ground terminal of the charging detection comparator.
9. The charging self-displaying circuit of claim 1, wherein at least one of the first resistor, the second resistor, the third resistor, and the fourth resistor is a variable resistor.
10. A battery pack characterized by comprising the charge self-display circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221456546.4U CN217720775U (en) | 2022-06-10 | 2022-06-10 | Charging self-display circuit and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221456546.4U CN217720775U (en) | 2022-06-10 | 2022-06-10 | Charging self-display circuit and battery pack |
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| Publication Number | Publication Date |
|---|---|
| CN217720775U true CN217720775U (en) | 2022-11-01 |
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| CN202221456546.4U Active CN217720775U (en) | 2022-06-10 | 2022-06-10 | Charging self-display circuit and battery pack |
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| CN (1) | CN217720775U (en) |
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- 2022-06-10 CN CN202221456546.4U patent/CN217720775U/en active Active
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