CN202190103U - Protective Case Allows Handheld Devices to Reverse Discharge - Google Patents

Abstract

A protective cover for a hand held device having a charging connector and a rechargeable battery for reverse discharge, the protective cover comprising: a protective sleeve battery which can be charged and discharged; a first connector; a corresponding charging connector is electrically butted with the charging connector; a bidirectional DC-DC (direct current to direct current, DC-DC for short) converter having a DC-DC buck-boost circuit module; a charge-discharge controller with an overload prevention circuit module is electrically connected with the bidirectional DC-DC converter, the first connector and the bidirectional DC-DC converter are respectively electrically connected with the electric anode of the protective sleeve battery, and the charge-discharge controller is electrically connected with the negative electrode of the protective sleeve battery through the corresponding charge connector; a second connector electrically connected to the bidirectional DC-DC converter; and the charge and discharge selection switch is electrically connected with the charge and discharge controller, and the charge and discharge controller controls one or two of the protective sleeve battery and the rechargeable battery to discharge to the outside or charge the rechargeable battery to the inside through the bidirectional DC-DC converter through the selection of the charge and discharge selection switch.

Description

Protective Case Allows Handheld Devices to Reverse Discharge

technical field

The utility model relates to a protective cover for a handheld device, in particular to a protective cover that allows the handheld device to discharge in reverse.

Background technique

With the advancement of technology, more and more handheld devices (or handheld electronic devices) are carried by users, such as mobile phones, digital cameras, digital video cameras, navigation devices, and notebook computers when going out and traveling. etc., and these handheld devices all have their exclusive rechargeable batteries and chargers, to charge the rechargeable batteries by the charger when the power is insufficient.

However, these handheld devices all have their independent power supply systems, so that when one of the handheld devices is out of power, other handheld devices that still have power cannot provide power support.

Furthermore, since there are not only two or three kinds of handheld devices that can be carried when going out or traveling (as mentioned above), relatively speaking, various chargers must be carried. If 110/220V (Volt, referred to as V, Chinese translation: volts) converters and different plugs in different countries are obviously more troublesome and inconvenient.

Therefore, how to design a kind of utility model that can overcome the above-mentioned difficulties is a big problem that the utility model wants to solve urgently.

Utility model content

The purpose of the utility model is to provide a protective cover that can allow the handheld device to discharge reversely, so as to improve the defects in the known technology.

In order to achieve the above purpose, the utility model provides a protective cover that allows the handheld device to discharge in reverse. The handheld device has a charging connector and a rechargeable battery that are electrically connected to each other. The protective cover includes:

a corresponding charging connector electrically connected to the charging connector of the handheld device;

A battery in a protective case, which is a rechargeable and dischargeable battery;

a first connector;

A bidirectional DC-DC converter with a DC-DC buck-boost circuit module;

A charge-discharge controller with an overload prevention circuit module, the charge-discharge controller is electrically connected to the bidirectional DC-DC converter, and the first connector and the bidirectional DC-DC converter are also electrically connected to the the positive electrode of the protective case battery, and the charge-discharge controller is electrically connected to the negative electrode of the protective case battery via the corresponding charging connector;

a second connector electrically connected to the bidirectional DC-DC converter; and

A charge-discharge selection switch, electrically connected to the charge-discharge controller, through the selection of the charge-discharge selector switch, the charge-discharge controller controls one of the protective sheath battery and the rechargeable battery through the bidirectional DC-DC conversion The charging and discharging controller can also control the protective cover battery to charge the rechargeable battery internally via the bidirectional DC-DC converter.

In the protective case capable of allowing reverse discharge of the handheld device, the first connector and the second connector have an anti-misconnection design.

The protective cover that allows reverse discharge of the handheld device, wherein the first connector and the second connector are micro USB (Micro USB).

In the protective cover that allows the handheld device to discharge reversely, the charge and discharge controller has a limiting circuit module to limit the degree of external discharge.

In the protective cover that can allow reverse discharge of the handheld device, the limiting circuit module is a current flow controller.

In the protective cover capable of reverse discharge of the handheld device, the limiting circuit module is a timer.

In the protective case that allows the handheld device to discharge reversely, the bidirectional DC-DC converter uses its DC-DC step-down circuit module to adjust its voltage level during charging and discharging.

In the utility model, a circuit component that allows the hand-held device to discharge reversely is arranged in the protective cover, so that the power of the hand-held device can be reversely discharged to another handheld device through the protective cover in case of emergency.

The circuit component of the utility model that allows the handheld device to discharge reversely includes a protective cover battery, so as to also charge the rechargeable battery of the handheld device contained in the protective cover (that is, charge inward), and has a more For convenience.

Description of drawings

FIG. 1 is a schematic diagram of the protective case of the present invention and the handheld device before being accommodated.

Fig. 2 is a schematic diagram of the utility model after being accommodated according to Fig. 1 .

FIG. 3 is a schematic diagram of a protective case accommodating a handheld device discharging to another handheld device according to the present invention.

FIG. 4 is a schematic diagram of the present invention when two protective sleeves accommodating a handheld device are charged and discharged therebetween.

5A to 5D are circuit diagrams of four embodiments of the bidirectional DC-DC converter in the protective case of the present invention.

Explanation of main component symbols in the attached drawings:

100, 100a protective cover; 1 corresponds to the charging connector; 2 bidirectional DC-DC converter; 21 DC-DC step-down circuit module; 3 charge and discharge controller; 31 overload prevention circuit module; 5 second connector; 6 charging and discharging selection switch; 7 protective cover battery; 800, 800a handheld device; 8 rechargeable battery; 81 charging connector.

Detailed ways

The utility model provides a protective cover capable of reversely discharging a handheld device. The handheld device has a charging connector electrically connected to each other and a rechargeable battery electrically connected to the charging connector. The protective cover includes : a corresponding charging connector, a protective cover battery capable of charging and discharging, a first connector, a bidirectional DC-DC converter, a charging and discharging controller, a second connector, and a charging and discharging selection switch. Wherein, the corresponding charging connector can be electrically connected to the charging connector of the handheld device; the bidirectional DC-DC converter has a DC-DC step-down circuit module; the charging and discharging controller has an overload prevention circuit module, the charging The discharge controller is electrically connected to the bidirectional DC-DC converter, and the first connector and the bidirectional DC-DC converter are also electrically connected to the charging connector corresponding to the positive pole of the protective case battery. The discharge controller is electrically connected to the negative electrode of the protective cover battery through the corresponding charging connector. The corresponding charging connector is also electrically connected to the charging and discharging controller; the second connector is electrically connected to the bidirectional DC-DC converter; the charge and discharge selection switch is electrically connected to the charge and discharge controller, and through the selection of the charge and discharge selection switch, the charge and discharge controller controls one of the protective cover battery and the rechargeable battery to pass through The bidirectional DC-DC converter discharges externally, and the charge-discharge controller can also control the protective cover battery to charge the rechargeable battery or charge the rechargeable battery internally via the bidirectional DC-DC converter.

Thus, the hand-held device can reversely discharge its power to another hand-held device that needs power supplement through the protective cover, and the purpose of reverse discharge can be achieved indeed.

In order to further understand the features, characteristics and technical contents of the present utility model, please refer to the following detailed description and accompanying drawings of the present utility model, but the accompanying drawings are only for reference and illustration, and are not intended to limit the present utility model.

The utility model provides a protective cover that allows the handheld device to discharge in reverse, and it is mainly used to allow the handheld device covered with the utility model to discharge the other handheld device (as shown in Figure 3), or to allow each The two handheld devices covered with the protective cover of the utility model are charged and discharged with each other (as shown in FIG. 4 ).

Please refer to Fig. 1 and Fig. 2, in the protective case of the present invention that allows the handheld device to discharge in reverse, the handheld device 800 has a charging connector 81 and a rechargeable battery 8 electrically connected to the charging connector, The rechargeable battery 8 can be recharged repeatedly to supply power to the handheld device 800. The protective cover 100 includes: a corresponding charging connector 1, a bidirectional DC-DC converter 2, a charging and discharging controller 3, a first connector 4, A second connector 5 , a charging and discharging selection switch 6 , and a protective case battery 7 .

The bidirectional DC-DC converter 2 has a DC-DC buck-boost circuit module 21. Please refer to FIG. 5A to FIG. 5D which are circuit diagrams of four feasible embodiments of the bidirectional DC-DC converter 2 (wherein: Figure 5A is a SEPIC-ZETA (Single-ended Primary Industry Converter, SEPIC for short, Chinese translation: single-ended primary inductive coupling converter; ZETA Chinese translation: Zeta converter) bidirectional DC-DC circuit, only in the original SEPIC circuit (Single -ended Primary Industry Converter, referred to as SEPIC, Chinese translation: single-ended primary inductively coupled converter) A crystal is connected in parallel next to the diode of the original SEPIC circuit, and a diode is connected in parallel next to the crystal of the original SEPIC circuit to achieve the purpose of bidirectional charging and discharging. Using the same method The Buck-Boost (boost-boost converter) circuit can be transformed into a bidirectional Buck-Boost DC-DC circuit as shown in Figure 5B. As shown in Figure 5C, it is a bidirectional DC-DC transformed with a Flyback (flyback converter) circuit Circuit. As shown in Figure 5D, it is a bidirectional DC-DC circuit transformed with a Cuk (Cuke converter) circuit).

The charging and discharging controller 3 has an overload prevention circuit module 31, and preferably also has a limiting circuit module 32, to limit the degree of external discharge, so as to avoid fully discharging the electric power of the rechargeable battery 8 of the handheld device 800 in the protective case 100 For other handheld devices (800a shown in Figure 3); the charge and discharge controller 3 is electrically connected to the bidirectional DC-DC converter 2, and the first connector 4 and the bidirectional DC-DC converter 2 are also electrically connected The charging and discharging controller 3 is electrically connected to the negative electrode of the protective case battery 7 through the corresponding charging connector 1 . The second connector 5 is electrically connected to the bidirectional DC-DC converter 2 . The charge and discharge selection switch 6 is electrically connected to the charge and discharge controller 3, so that the charge and discharge controller 3 controls the protective cover battery 7 or the rechargeable battery 8 via the bidirectional DC- DC converter 2 for external discharge, or charge and discharge controller 3 to control the protective cover battery 7 to charge the rechargeable battery 8 of the handheld device 800 in the protective cover 100 via the bidirectional DC-DC converter 2 Charging (that is, allowing the protective case battery 8 to charge the rechargeable battery 8 of the handheld device 800 accommodated in the protective case 100 via the electrical connection between the charging connector 81 and the corresponding charging connector 1 ). In addition, an unshown charger can also be externally connected to the protective case 100 to charge the protective case battery 7 or its own rechargeable battery 8 (referring to the rechargeable battery 8 of the handheld device 800 contained in the protective case 100 ).

Wherein, the first connector 4 and the second connector 5 have an anti-misconnection design to avoid misconnection. Preferably, the first connector 4 and the second connector 5 are micro USB (miniature universal serial bus, Micro Universal Serial Bus (Micro USB for short), to utilize the ubiquity and universal characteristics of these micro USBs, so that the utility model can also have convenience. The limiting circuit module 32 of the charge-discharge controller 3 can be: 1. a current flow controller (Power meter) to control the current flow during charging, or 2. a timer (Timer) to control the length of time during charging. The bidirectional DC-DC converter 2 can also adjust the voltage level of the rechargeable battery 8 during charging and discharging through its DC-DC step-down circuit module 21 .

In addition, in order to prevent the charging connectors of various handheld devices from leaking, in the past, special designs were made in the original circuit modules (not marked with component symbols) in the handheld devices, so that the known charging connectors can only charge internally and cannot External discharge; now, in order to achieve the purpose of "reverse discharge" in the utility model, it is necessary to obtain the cooperation of the handheld device manufacturer first, and change the special design of its original circuit module to allow reverse discharge. In this way, the handheld device 800 In addition to being charged via the charging connector 81, the rechargeable battery 8 can also be reversely discharged (reversely externally discharged) through the protective cover 100 of the present invention, that is, other handheld devices can be charged.

Please refer to FIG. 3 , which is a schematic diagram of a protective cover 100 (located on the left side of FIG. 3 ) accommodating a handheld device 800 of the present invention when discharging to another handheld device 800a (located on the right side of FIG. 3 ), wherein, The protective case 100 on the left side of FIG. 3 is shown as a solid line, while the handheld device 800 is shown as a dotted line because it is accommodated in the protective case 100 . As shown in the figure, the user selects the charging and discharging selection switch 6 of the left protective cover 100 to discharge, so as to use the charging and discharging controller 3 to control the protective cover battery 7 or the rechargeable battery 8 of the handheld device 800 to start external discharge, and the discharged power Then, the voltage is increased or decreased through the DC-DC buck-boost circuit module 21 of the bidirectional DC-DC converter 2 to meet the voltage required by the object to be charged (such as the handheld device 800a on the right side of FIG. 3 ). In the figure, the second connector 5 of the protective case 100 and the charging connector 81 of the hand-held device 800a are connected by a connecting line (not marked with a component symbol), that is, the electric power of the protective case battery 7 built in the protective case 100 can be charged. , or the power discharge of the rechargeable battery 7 of the hand-held device 800 in the protective case 100 to the rechargeable battery 8 of the hand-held device 800a, so that the power of the hand-held device 800 (or the self-protective case battery 7 can be conveniently used in an emergency) power) through the protective cover 100 and reverse discharge to the other handheld device 800a, the user will not need to carry a special charger and a 110/220V converter with him because he is afraid of a temporary power failure when he goes out. And in order to make the protective cover 100 of the present utility model applicable to various handheld devices, Micro USB (Micro USB) is used as a universal connector, so that any type of handheld device 800 can also be connected to any handheld device 800 through the protective cover 100 of the present utility model. Another type of handheld device 800a is discharged (ie, externally charged).

Please refer to FIG. 4 , which is a schematic diagram of two protective cases 100 , 100 a each accommodating a handheld device 800 , 800 a during charging and discharging therebetween. As shown in the figure, the user selects the charge and discharge selection switch 6 of the left protective cover 100 to discharge, so as to use the charge and discharge controller 3 to control the battery 7 of the protective cover or the rechargeable battery 8 of the handheld device 800 contained therein to start external charging. Discharge, the discharged power is then passed through the DC-DC step-down circuit module 21 of the bidirectional DC-DC converter 2 to increase or decrease the voltage to meet the needs of the object to be charged (such as the handheld device 800a on the right side of FIG. 4 ) voltage. In the figure, the first connector 4 connected to the left side protective case 100 and the second connector 5 of the right side protective case 100a are connected by a connecting line (unmarked component symbol), that is, the electric power of the protective case battery 7, Or discharge the power of the rechargeable battery 7 of the handheld device 700 contained in the left protective case 100 to the rechargeable battery 8 of the handheld device 800a contained in the right protective case 100a (that is, charge externally).

However, if the power of the handheld device 800 is about to run out, the protective case battery 7 built into the protective case 100 can also charge the rechargeable battery 8 of the handheld device 800 contained in the protective case 100 (that is, to charging inside).

To sum up, the protective case of the present invention that can allow the handheld device to discharge reversely is characterized in that: the special design of the circuit components and structure enables the handheld device 800 that is accommodated and electrically connected to the protective case 100 of the present invention The rechargeable battery 8 can be reversely discharged, and no longer only can supply power to the handheld device 800 as known (of course, the cooperation of the handheld device manufacturer must be obtained first, and the special design of its original circuit module is changed to allow reverse discharge) , so that the power of the protective case battery 7 built in the protective case 100 or the power of the rechargeable battery 8 of a handheld device 800 can be reversely discharged to those who need power supplementation through the housed protective case 100 of the present invention Another hand-held device 800a (or another hand-held device 800a that also accommodates another utility model protective cover 100a) can indeed achieve the purpose of reverse discharge; Carry a large number and weight of various chargers, converters and plugs from different countries. The protective cover battery 7 built in the protective cover 100 can also charge the rechargeable battery 8 of the handheld device 800 accommodated in the protective cover 100 (that is, internal charging), which has more convenient effects . The bidirectional DC-DC converter 2 and its DC-DC buck-boost circuit module 21 are used to output the power after the voltage has been raised or lowered to the outside for other handheld devices with different voltage requirements. The charging and discharging are accelerated by the step-up of the DC-DC buck-boost circuit module 21 .

The above is only a preferred feasible embodiment of the present utility model, and does not limit the scope of rights of the present utility model. All equivalent structural changes made by using the description of the utility model and the contents of the accompanying drawings are all included. Within the scope of the claims of the present utility model.

Claims (7)

1. a charge connector and rechargeable battery that can let the protective sleeve of hand-held device back discharge, this hand-held device have to be electrically connected each other is characterized in that this protective sleeve comprises:

A pair of inductive charging connector electrically butts up against the charge connector of this hand-held device;

One protective sleeve battery is the battery that can discharge and recharge;

One first connector;

One bidirectional DC-DC converter has a DC-DC step-up/step-down circuit module;

One charging-discharging controller; Has the overload preventing circuit module; This charging-discharging controller is electrically connected at this bidirectional DC-DC converter; And this first connector is anodal with the electricity that this bidirectional DC-DC converter also is electrically connected at this protective sleeve battery respectively, and this charging-discharging controller then is electrically connected at the negative electrode of this protective sleeve battery via said corresponding charge connector;

One second connector is electrically connected at this bidirectional DC-DC converter; And

One discharges and recharges selector switch; Be electrically connected at this charging-discharging controller; Discharge and recharge the selection of selector switch via this; One of them of this this protective sleeve battery of charging-discharging controller control and this rechargeable battery externally discharged via this bidirectional DC-DC converter, and this charging-discharging controller also can be controlled this protective sleeve battery and via this bidirectional DC-DC converter said rechargeable battery internally charged.

2. according to the said protective sleeve that lets the hand-held device back discharge of claim 1, it is characterized in that wherein this first connector has anti-wrong design with this second connector.

3. according to the said protective sleeve that lets the hand-held device back discharge of claim 1, it is characterized in that wherein this first connector is a micro USB with this second connector.

4. according to the said protective sleeve that lets the hand-held device back discharge of claim 1, it is characterized in that wherein this charging-discharging controller has a restricting circuits module, restriction is the degree of discharge externally.

5. according to the said protective sleeve that lets the hand-held device back discharge of claim 4, it is characterized in that wherein this restricting circuits module is the current flow policer.

6. according to the said protective sleeve that lets the hand-held device back discharge of claim 4, it is characterized in that wherein this restricting circuits module is a timer.

7. according to the said protective sleeve that lets the hand-held device back discharge of claim 1, it is characterized in that wherein this bidirectional DC-DC converter is by its voltage height when discharging and recharging of its DC-DC step-up/step-down circuit module adjustment.

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