CN209982134U - Charge-discharge protection device and charging box - Google Patents
Charge-discharge protection device and charging box Download PDFInfo
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- CN209982134U CN209982134U CN201921015798.1U CN201921015798U CN209982134U CN 209982134 U CN209982134 U CN 209982134U CN 201921015798 U CN201921015798 U CN 201921015798U CN 209982134 U CN209982134 U CN 209982134U
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Abstract
The utility model provides a charge-discharge protection device and a box that charges, wherein, charge-discharge protection device includes: a wireless magnetic induction charging receiving circuit; the input end of the over-current protection chip is connected with the output end of the wireless magnetic induction charging receiving circuit; the input end of the overvoltage protection chip is connected with the output end of the overcurrent protection chip; and the input end of the battery is connected with the output end of the overvoltage protection chip. The control of the charging current and voltage is realized by arranging the over-current protection chip and the over-voltage protection chip, and compared with the related technology, the capture of weak current and voltage can be realized, so that the control of the charging current and the charging voltage is realized, and the safety of the charging process is improved.
Description
Technical Field
The utility model relates to a charge protection technical field particularly, relates to a charge-discharge protection device and a box that charges.
Background
In the related technical solution, the real wireless headset is usually configured with a mobile charging box matched with the real wireless headset, and like a mobile power supply sold in the current market, the real wireless headset can be charged, so as to improve the endurance time, however, since the discharging current of the mobile charging box is too small, the charging and discharging current cannot be detected only by using a single integrated circuit chip as the mobile power supply, and if the charging and discharging current cannot be responded to in real time, the situation that the real wireless headset is in an unfilled state but is detected to be filled exists.
SUMMERY OF THE UTILITY MODEL
The present invention aims at least solving one of the technical problems existing in the prior art or the related art.
Therefore, the first aspect of the present invention is to provide a charge and discharge protection device.
A second aspect of the present invention provides a charging box.
In view of the above, according to a first aspect of the present invention, the present invention provides a charge and discharge protection device, comprising; a wireless magnetic induction charging receiving circuit; the input end of the over-current protection chip is connected with the output end of the wireless magnetic induction charging receiving circuit; the input end of the overvoltage protection chip is connected with the output end of the overcurrent protection chip; and the input end of the battery is connected with the output end of the overvoltage protection chip.
The utility model provides a charge-discharge protection device includes: the wireless magnetic induction charging receiving circuit comprises a wireless magnetic induction charging receiving circuit, an overcurrent protection chip, an overvoltage protection chip and a battery. The wireless magnetic induction charging receiving circuit is used for receiving electric energy, the electric energy is transmitted to a battery through an overcurrent protection chip and an overvoltage protection chip, and charging of the battery is achieved.
Additionally, the utility model provides a charge-discharge protection device among the above-mentioned technical scheme can also have following additional technical characteristics:
in the above technical solution, further, the method further includes: and the wired power supply interface is connected with the input end of the overcurrent protection chip.
In the technical scheme, the charging and discharging protection device is further provided with a wired power supply interface so as to supply power to the battery according to the wired power supply interface, and the wired power supply interface and the wireless magnetic induction charging receiving circuit provide multiple power supply modes for users and meet charging requirements in different scenes.
In any of the above technical solutions, further, the overvoltage protection chip is specifically configured to: when the voltage of the output end of the overcurrent protection chip is smaller than a first preset voltage, stopping charging the battery; when the voltage of the output end of the overcurrent protection chip is greater than a first preset voltage and less than a second preset voltage, charging the battery; and when the voltage of the output end of the overcurrent protection chip is greater than the second preset voltage and less than the third preset voltage, stopping charging the battery.
In the technical scheme, when the voltage of the output end of the over-current protection chip is less than a first preset voltage, the charging of the battery is stopped, the charging failure caused by the over-low voltage for charging the battery is avoided, when the voltage of the output end of the over-current protection chip is more than the first preset voltage and less than a second preset voltage, the charging of the battery is stopped, the voltage for charging the battery is ensured to be within a safe voltage, the safety of the charging process is further improved, when the voltage of the output end of the over-current protection chip is more than the second preset voltage and less than a third preset voltage, the charging of the battery is stopped, the damage of a charge-discharge protection device caused by overvoltage is reduced, when the voltage of the output end of the over-current protection chip is more than the third preset voltage, the protection chip is burnt due to the overhigh input voltage, and at the moment, the current flowing through the over-current protection chip is increased, the overcurrent protection chip realizes the protection of the charge-discharge protection device according to the magnitude of the flowing current, so that the charge-discharge safety of the battery is improved, meanwhile, the gradient management of the current and the voltage is realized by setting a threshold value in advance, and the sensitivity of the current and voltage control is improved.
In any of the above technical solutions, further, the overcurrent protection chip is specifically configured to be turned on when a current at the output end of the wireless magnetic induction charging receiving circuit is smaller than a current threshold; otherwise, the overcurrent protection chip is disconnected.
In the technical scheme, when the current flowing through the current protection chip is larger than the current threshold value, the current protection chip is disconnected, and at the moment, the electric energy input by the wireless magnetic induction charging receiving circuit or the wired power interface cannot be transmitted to the overvoltage protection chip, namely, charging cannot be carried out, so that the overvoltage protection chip and the battery are protected. The charging current and the discharging current are separately monitored and controlled, so that the safety of the charging and discharging process is improved.
In any of the above technical solutions, further, the method further includes: and the input end of the over-discharge protection chip is connected with the output end of the battery, and when the battery discharges, electric energy is output through the output end of the over-discharge protection chip.
In the technical scheme, the over-discharge protection chip is arranged, wherein the over-discharge protection chip is connected with the output end of the battery and used for controlling when the battery outputs electric energy outwards, so that the over-discharge is avoided, and the service life of the battery is prolonged.
In any of the above technical solutions, further, the over-discharge protection chip includes at least one microprocessor and at least one field effect transistor; and the microprocessor detects the current of the output end of the battery in real time, and controls the on or off of the field effect transistor when the duration that the current of the output end of the battery is smaller than the preset fluctuation range is longer than the first preset duration so as to stop the output of the battery.
In the technical scheme, the over-discharge protection chip comprises at least one microprocessor and at least one field effect transistor; the microprocessor detects the current of the output end of the battery in real time, and controls the on or off of the field effect transistor when the duration that the current of the output end of the battery is smaller than the preset fluctuation range is longer than the first preset duration, so that the battery stops outputting, and the condition of overcharge of the battery is further avoided.
In any of the above technical solutions, further, the overvoltage protection chip includes at least one varistor; the overvoltage protection chip is also used for adjusting the resistance value of the voltage dependent resistor when the voltage of the output end of the overcurrent protection chip is greater than a second preset voltage and less than a third preset voltage.
In the technical scheme, the overvoltage protection chip at least comprises a piezoresistor, when the output voltage of the overcurrent protection chip is greater than the second preset voltage and less than the third preset voltage, the resistance of the piezoresistor is adjusted, the voltage inside the overvoltage protection chip is further adjusted, and meanwhile, the risk of damage of the over-discharge protection chip is reduced, so that the safety of the overvoltage protection chip and the over-discharge protection chip is ensured, and the damage caused by the overlarge input voltage is avoided.
In any of the above technical solutions, further, the at least one microprocessor is further configured to send information on the electric quantity of the battery in real time; and adjusting the output information of the battery while controlling the at least one field effect transistor to be turned on or off to stop the output of the battery.
In the technical scheme, the at least one microprocessor is further configured to send the information of the electric quantity of the battery in real time, so as to adjust the output information of the battery while the battery finishes discharging outwards, so that a user can know the current condition of the battery, for example, the remaining electric quantity of the battery is displayed, and the user can determine whether to charge the battery.
In any of the above technical solutions, further, the wired power interface is a Type-C interface.
In any of the above technical solutions, further, the overcurrent protection chip is a self-recovery fuse.
In this technical scheme, use the self-resuming fuse as overcurrent protection chip to current limit to flowing through to enough little after the overcurrent condition appears, and then reduce the risk that charge-discharge protection device damaged because of overflowing, avoid having the on-off state that lasts the circulation, simultaneously, the self-resuming characteristic of self-resuming fuse can avoid the maintenance to change.
In any of the above technical solutions, further, the first preset voltage is less than or equal to 3.75V and less than or equal to 5.0V; and/or the second preset voltage is less than or equal to 6.5V and less than or equal to 5.5V; and/or the second preset voltage is less than or equal to 22V and less than or equal to 27V; and/or the preset fluctuation range is less than or equal to 5mA and less than or equal to 10 mA.
According to the utility model discloses a second aspect, the utility model provides a charging box, include as above-mentioned arbitrary charge-discharge protection device.
In this technical scheme, the utility model provides a charge box contains above-mentioned arbitrary item charge and discharge protection device, the event has above-mentioned arbitrary item charge and discharge protection device's whole beneficial technological effects, no longer give consideration to here.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a schematic connection diagram of a charge and discharge protection device according to an embodiment of the present invention;
fig. 2 shows a schematic connection diagram of a charge and discharge protection device according to another embodiment of the present invention;
fig. 3 shows a schematic connection diagram of a charge and discharge protection device according to yet another embodiment of the present invention;
wherein, the correspondence between the reference numbers and the component names in fig. 1 to 3 is:
12 wireless magnetic induction charging receiving circuit, 14 overcurrent protection chip, 16 overvoltage protection chip, 18 battery, 20 wired power interface, 22 overdischarge protection chip.
Detailed Description
In order that the above aspects, features and advantages of the present invention can be more clearly understood, a further detailed description of the present invention will be given below with reference to the accompanying drawings and the detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Example one
In an embodiment of the present invention, as shown in fig. 1, the present invention provides a charging and discharging protection device, including; a wireless magnetic induction charging receiving circuit 12; the input end of the overcurrent protection chip 14 is connected with the output end of the wireless magnetic induction charging receiving circuit 12; the input end of the overvoltage protection chip 16 is connected with the output end of the overcurrent protection chip 14; and a battery 18, wherein the input end of the battery 18 is connected with the output end of the overvoltage protection chip 16.
The utility model provides a charge-discharge protection device includes: the wireless magnetic induction charging receiving circuit 12, the overcurrent protection chip 14, the overvoltage protection chip 16 and the battery 18. The wireless magnetic induction charging receiving circuit 12 is used for receiving electric energy, and transmitting the electric energy to the battery 18 through the overcurrent protection chip 14 and the overvoltage protection chip 16, so as to charge the battery 18, specifically, the overcurrent protection chip 14 is used for restricting the size of the charging current, so as to avoid the overcurrent condition, the overvoltage protection chip 16 is used for restricting the charging voltage, so as to avoid the overvoltage condition, the control of the charging current and the charging voltage is realized by setting the overcurrent protection chip 14 and the overvoltage protection chip 16, compared with the related technology, the capture of weak current and weak voltage can be realized, the situations that the true wireless earphone is in an unfilled state and is detected to be filled are avoided, the control of the charging current and the charging voltage is realized, and the safety of the charging process is improved.
Optionally, a charging management module is disposed in the wireless magnetic induction charging receiving circuit 12, and is configured to control the wireless magnetic induction charging receiving circuit 12 to be turned on and off, and also may be configured to control the output current and voltage.
In an embodiment of the present invention, as shown in fig. 2, the present invention further includes: and the wired power supply interface 20, wherein the wired power supply interface 20 is connected with the input end of the over-current protection chip 14.
In this embodiment, the charging and discharging protection device is further provided with a wired power interface 20 so as to supply power to the battery 18 according to the wired power interface 20, and the wired power interface 20 and the wireless magnetic induction charging receiving circuit 12 provide multiple power supply modes for a user to meet charging requirements in different scenes.
In an embodiment of the present invention, the overvoltage protection chip 16 is specifically configured to: when the voltage at the output end of the overcurrent protection chip 14 is less than the first preset voltage, stopping charging the battery 18; when the voltage at the output end of the overcurrent protection chip 14 is greater than a first preset voltage and less than a second preset voltage, charging the battery 18; when the voltage at the output terminal of the overcurrent protection chip 14 is greater than the second preset voltage and less than the third preset voltage, the charging of the battery 18 is stopped.
In this embodiment, when the voltage at the output end of the over-current protection chip 14 is less than the first preset voltage, the charging to the battery 18 is stopped, so as to avoid the charging failure caused by the too low voltage for charging the battery 18, and when the voltage at the output end of the over-current protection chip 14 is greater than the first preset voltage and less than the second preset voltage, the charging to the battery 18 is stopped, so as to ensure that the voltage during the charging to the battery 18 is within the safe voltage, so as to improve the safety of the charging process, when the voltage at the output end of the over-current protection chip 14 is greater than the second preset voltage and less than the third preset voltage, the charging to the battery 18 is stopped, so as to reduce the damage of the charging and discharging protection device caused by the overvoltage, when the voltage at the output end of the over-current protection chip 14 is greater than the third preset voltage, the overvoltage protection chip 16 is burnt due to the too high input voltage, the current that flows through the overcurrent protection chip 14 can increase, and the overcurrent protection chip 14 realizes the protection of charge-discharge protection device according to the electric current size of flowing through, and then has improved the security of battery 18 charge-discharge, realizes the gradient management to current-voltage through setting for the threshold value in advance simultaneously, promotes the sensitivity to current-voltage control.
In an embodiment of the present invention, the over-current protection chip 14 is specifically configured to turn on the over-current protection chip 14 when the current at the output end of the wireless magnetic induction charging receiving circuit 12 is smaller than the current threshold; otherwise the over-current protection chip 14 is turned off.
In this embodiment, when the current flowing through the current protection chip 14 is greater than the current threshold, the overcurrent protection chip 14 is turned off, and at this time, the electric energy input by the wireless magnetic induction charging receiving circuit 12 or the wired power interface 20 cannot be transmitted to the overvoltage protection chip 16, that is, cannot be charged, so as to protect the overvoltage protection chip 16 and the battery 18. The charging current and the discharging current are separately monitored and controlled, so that the safety of the charging and discharging process is improved.
Optionally, the value of the current threshold ranges from 1.5 times to 2 times of the working current of the overcurrent protection chip 14, and the current threshold may also be 1.5 times of the working current or 2 times of the working current.
In an embodiment of the present invention, as shown in fig. 3, the present invention further includes: and an input end of the over-discharge protection chip 22 is connected with an output end of the battery 18, and when the battery 18 discharges, electric energy is output through the output end of the over-discharge protection chip 22.
In this embodiment, the over-discharge protection chip 22 is provided, wherein the over-discharge protection chip 22 is connected to the output terminal of the battery 18 for controlling when the battery 18 outputs power to the outside, so as to avoid over-discharge, thereby prolonging the service life of the battery 18.
In one embodiment of the present invention, the over-discharge protection chip 22 includes at least one microprocessor and at least one field effect transistor; the at least one microprocessor detects the current of the output end of the battery 18 in real time, and controls the at least one field effect transistor to be switched on or switched off when the duration that the current of the output end of the battery 18 is smaller than the preset fluctuation range is longer than the first preset duration, so that the battery 18 stops outputting.
In this embodiment, the over-discharge protection chip 22 includes at least one microprocessor and at least one field effect transistor; the at least one microprocessor detects the current of the output end of the battery 18 in real time, and controls the at least one field effect transistor to be switched on or switched off when the duration that the current of the output end of the battery 18 is smaller than the preset fluctuation range is longer than the first preset duration, so that the battery 18 stops outputting, and the condition of overcharging of the battery 18 is further ensured.
Optionally, the first preset time period is determined according to a battery state of the charged device.
Optionally, the at least one microprocessor is further configured to output the current charging status, such as switching a charging indicator light, so that the user is aware of the end of the current battery charging.
In one embodiment of the present invention, the overvoltage protection chip 16 includes at least one voltage dependent resistor; the overvoltage protection chip 16 is further configured to adjust the resistance of the voltage dependent resistor when the voltage at the output terminal of the overcurrent protection chip 14 is greater than the second preset voltage and less than the third preset voltage.
In this embodiment, the overvoltage protection chip 16 at least includes a voltage dependent resistor, and when the output voltage of the overcurrent protection chip 14 is greater than the second preset voltage and less than the third preset voltage, the resistance of the voltage dependent resistor is adjusted, so as to adjust the voltage inside the overvoltage protection chip 16, and at the same time, reduce the risk of the damage to the overdischarge protection chip 22, so as to ensure the safety of the overvoltage protection chip 16 and the overdischarge protection chip 22, and avoid the damage caused by the excessive input voltage.
In one embodiment of the present invention, the at least one microprocessor is further configured to send the power information of the battery 18 in real time; and adjusts the output information of the battery 18 while controlling the at least one field effect transistor to be turned on or off to stop the output of the battery 18.
In this embodiment, the at least one microprocessor is further configured to send the information about the charge level of the battery 18 in real time, so as to adjust the output information of the battery 18 while the battery 18 finishes discharging, so that the user can know the current condition of the battery 18, such as displaying the remaining charge level of the battery 18, so that the user can determine whether to perform charging.
In an embodiment of the present invention, the wired power interface is a Type-C interface.
Alternatively, the wired power interface may be a Universal Serial Bus (USB) interface, or a Micro-USB interface, or may be a direct power connection via a charging adapter, such as a charging adapter outputting 5 volts.
In one embodiment of the present invention, the over-current protection chip 14 is a self-healing fuse.
In this embodiment, a self-recovery fuse is used as the overcurrent protection chip 14, so as to limit the flowing current to be small enough after the overcurrent condition occurs, thereby reducing the risk of damage of the charging and discharging protection device due to overcurrent, avoiding the existence of the on-off state of continuous circulation, and meanwhile, the self-recovery characteristic of the self-recovery fuse can avoid maintenance and replacement.
In any of the above embodiments, further, the first predetermined voltage is less than or equal to 3.75V and less than or equal to 5.0V; and/or the second preset voltage is less than or equal to 6.5V and less than or equal to 5.5V; and/or the second preset voltage is less than or equal to 22V and less than or equal to 27V; and/or the preset fluctuation range is less than or equal to 5mA and less than or equal to 10 mA.
Example two
In an embodiment of the present invention, there is provided a charging box including the charging and discharging protection device according to any one of the above embodiments.
In this embodiment, the utility model provides a charge box contains above-mentioned arbitrary charge and discharge protection device, the event has above-mentioned arbitrary charge and discharge protection device's whole beneficial technological effect, no longer gives unnecessary details here.
In the above embodiment, the charging box is used for charging the real wireless earphone, and when the real wireless earphone is placed in the charging box, the charging box automatically enters the charging mode until the battery capacity of the real wireless earphone is full.
Optionally, the wired power interface is provided on a base of the charging box.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In the present disclosure, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A charge-discharge protection device is applied to a charging box and is characterized by comprising:
a wireless magnetic induction charging receiving circuit;
the input end of the over-current protection chip is connected with the output end of the wireless magnetic induction charging receiving circuit;
the input end of the overvoltage protection chip is connected with the output end of the overcurrent protection chip;
and the input end of the battery is connected with the output end of the overvoltage protection chip.
2. The charge and discharge protection device according to claim 1, further comprising:
and the wired power supply interface is connected with the input end of the overcurrent protection chip.
3. The charge and discharge protection device according to claim 2, wherein the overvoltage protection chip is specifically configured to:
when the voltage of the output end of the overcurrent protection chip is smaller than a first preset voltage, stopping charging the battery;
when the voltage of the output end of the overcurrent protection chip is greater than the first preset voltage and less than a second preset voltage, charging the battery;
and when the voltage of the output end of the overcurrent protection chip is greater than the second preset voltage and less than a third preset voltage, stopping charging the battery.
4. Charge and discharge protection device according to claim 3,
the over-current protection chip is specifically used for conducting when the current at the output end of the wireless magnetic induction charging receiving circuit is smaller than a current threshold; otherwise
And the overcurrent protection chip is disconnected.
5. The charge and discharge protection device according to claim 4, further comprising:
the input end of the over-discharge protection chip is connected with the output end of the battery, and when the battery discharges, electric energy is output through the output end of the over-discharge protection chip.
6. The charge-discharge protection device according to claim 5,
the over-discharge protection chip comprises at least one microprocessor and at least one field effect transistor;
the at least one microprocessor detects the current at the output of the battery in real time,
and when the duration that the current of the output end of the battery is smaller than the preset fluctuation range is longer than a first preset duration, controlling the at least one field effect transistor to be switched on or switched off so as to stop the output of the battery.
7. The charging and discharging protection device according to claim 6, wherein said overvoltage protection chip comprises at least one varistor;
the overvoltage protection chip is further used for adjusting the resistance value of the voltage dependent resistor when the voltage of the output end of the overcurrent protection chip is larger than the second preset voltage and smaller than the third preset voltage.
8. The charge-discharge protection device according to claim 7,
the microprocessor is also used for sending the electric quantity information of the battery in real time; and
and adjusting the output information of the battery while controlling the at least one field effect transistor to be switched on or switched off so as to stop the output of the battery.
9. The charging and discharging protection device according to claim 8, wherein the power source interface is a Type-C interface;
the overcurrent protection circuit is a self-recovery fuse.
10. A charging box characterized by comprising the charge and discharge protection device according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921015798.1U CN209982134U (en) | 2019-07-02 | 2019-07-02 | Charge-discharge protection device and charging box |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921015798.1U CN209982134U (en) | 2019-07-02 | 2019-07-02 | Charge-discharge protection device and charging box |
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| CN209982134U true CN209982134U (en) | 2020-01-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI770970B (en) * | 2021-04-28 | 2022-07-11 | 達發科技股份有限公司 | Wireless audio output device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI770970B (en) * | 2021-04-28 | 2022-07-11 | 達發科技股份有限公司 | Wireless audio output device |
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