A charging and discharging device for an electric luggage case and an electric luggage case

Abstract

The utility model relates to electric suitcase technical field especially, it is a kind of charging and discharging equipment and electric suitcase for electric suitcase, wherein, electric suitcase includes box body, and box body is equipped with containing cavity, and charging and discharging equipment is located in containing cavity.Charging and discharging equipment includes: charging and discharging interface, charging and discharging circuit, energy storage unit and control chip, and charging and discharging interface is connected with energy storage unit through charging and discharging circuit;Control chip is connected with charging and discharging circuit, to control charging and discharging circuit to be in charging state or discharging state;Charging and discharging interface accesses first external device, and charging and discharging circuit is in charging state, and first external device carries out charging to energy storage unit;Charging and discharging interface accesses second external device, and charging and discharging circuit is in discharging state, and energy storage unit carries out discharging to second external device element.The utility model technical scheme is favorable to improve the aesthetic property of electric suitcase, and then improve user visual experience feeling.

Description

Technical Field

[0001] This utility model relates to the field of electric luggage technology, and in particular to a charging and discharging device for electric luggage and an electric luggage. Background Technology

[0002] With the increasing popularity of electric suitcases, users are demanding better aesthetics. However, in some technologies, electric suitcases often have both charging and discharging ports, leading to an increase in the number of openings on the outer shell and compromising the overall appearance. For example, commercially available electric suitcases typically have charging and discharging ports on the side of the suitcase, creating a visually noticeable "patched-up" look. Utility Model Content

[0003] To solve the above-mentioned technical problems, or at least partially solve them, this utility model provides a charging and discharging device for electric suitcases and an electric suitcase, which avoids the problem in related technologies where electric suitcases are equipped with both charging input interfaces and discharging output interfaces, resulting in an increase in the number of openings on the outer shell. This is beneficial to improving the aesthetics of the electric suitcase and thus enhancing the user's visual experience.

[0004] In a first aspect, this utility model provides a charging and discharging device for an electric suitcase, the electric suitcase including a suitcase body, the suitcase body having a receiving cavity, the charging and discharging device being located in the receiving cavity, the charging and discharging device comprising:

[0005] The system includes a charging / discharging interface, a charging / discharging circuit, an energy storage unit, and a control chip. The charging / discharging interface is connected to the energy storage unit through the charging / discharging circuit. The control chip is connected to the charging / discharging circuit to control the charging / discharging circuit to be in a charging or discharging state.

[0006] The charging / discharging interface is used to connect to a first external device or a second external device; when the charging / discharging interface is connected to the first external device, the control chip controls the charging / discharging circuit to be in a charging state, and the first external device charges the energy storage unit.

[0007] The charging / discharging interface is connected to the second external device, the control chip controls the charging / discharging circuit to be in a discharging state, and the energy storage unit discharges the second external device.

[0008] In some embodiments, the charging and discharging circuit includes a first switch, a second switch, a third switch, a fourth switch, and an inductor;

[0009] The first terminal of the first switch is connected to the voltage terminal of the charging and discharging interface, the second terminal of the first switch is connected to the first terminal of the third switch through the inductor, and the second terminal of the third switch is connected to the energy storage unit.

[0010] The first terminal of the second switch is connected between the first switch and the inductor, and the second terminal of the second switch is grounded; the first terminal of the fourth switch is connected between the third switch and the inductor, and the second terminal of the fourth switch is grounded.

[0011] The control chip is connected to the control terminal of each of the switches, and the control chip is used to control the conduction status of each of the switches so that the charging and discharging circuit is in a charging state or a discharging state.

[0012] In some embodiments, the control chip includes an external device identification terminal, and the charging / discharging interface includes a detection pin; the external device identification terminal is connected to the detection pin.

[0013] In some embodiments, the first switch, the second switch, the third switch, and the fourth switch are all MOSFETs.

[0014] In some embodiments, the charging and discharging circuit further includes:

[0015] The first capacitor, the second capacitor, the third capacitor, and the fourth capacitor;

[0016] The first terminal of the first capacitor is connected to the control terminal of the first switch, and the second terminal of the first capacitor is connected between the second terminal of the first switch and the inductor; the first terminal of the second capacitor is connected to the control terminal of the second switch, and the second terminal of the second capacitor is grounded; the first terminal of the third capacitor is connected to the control terminal of the third switch, and the second terminal of the third capacitor is connected between the first terminal of the third switch and the inductor; the first terminal of the fourth capacitor is connected to the control terminal of the fourth switch, and the second terminal of the fourth capacitor is grounded.

[0017] In some embodiments, the charging and discharging circuit is in the charging phase, and the charging and discharging circuit operates periodically.

[0018] Each working cycle includes a preceding cycle and a following cycle. In the preceding cycle, the first switch and the fourth switch are turned on, and the second switch and the third switch are turned off. In the following cycle, the first switch and the fourth switch are turned off, and the second switch and the third switch are turned on.

[0019] In some embodiments, the charging and discharging circuit is in the discharging phase, and the charging and discharging circuit operates periodically.

[0020] Each working cycle includes a preceding cycle and a following cycle. In the preceding cycle, the second and third switches are turned on, and the first and fourth switches are turned off. In the following cycle, the second and third switches are turned off, and the first and fourth switches are turned on.

[0021] In some embodiments, the charging and discharging device further includes:

[0022] A protection unit is located between the first terminal of the first switch and the voltage terminal of the charging / discharging interface.

[0023] In some embodiments, the protection unit includes a fifth switch and a sixth switch;

[0024] The fifth switch and the sixth switch are connected in parallel.

[0025] Secondly, this utility model provides an electric suitcase, including the charging and discharging device as described in the first aspect.

[0026] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0027] The charging and discharging device provided in this embodiment of the utility model can achieve charging and discharging using a single interface by setting up a charging and discharging interface and a charging and discharging circuit. This avoids the problem in related technologies where electric suitcases are equipped with both charging input interfaces and discharging output interfaces, which increases the number of openings on the outer shell. This is beneficial to improving the aesthetics of the electric suitcase and thus enhancing the user's visual experience. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A schematic diagram of the structure of a charging and discharging device provided in an embodiment of this utility model;

[0031] Figure 2 This is a schematic diagram of another charging and discharging device provided in an embodiment of the present utility model;

[0032] Figure 3 This is a schematic diagram of the structure of another charging and discharging device provided in an embodiment of the present utility model.

[0033] Among them, 10 is the charging and discharging interface; 11 is the charging and discharging circuit; 12 is the control chip; 13 is the energy storage unit; 14 is the protection unit; Q1 is the first switch; Q2 is the second switch; Q3 is the third switch; Q4 is the fourth switch; Q5 is the fifth switch; Q6 is the sixth switch; L is the inductor; CC is the detection pin; CC' is the external device identification terminal; C1 is the first capacitor; C2 is the second capacitor; C3 is the third capacitor; and C4 is the fourth capacitor. Detailed Implementation

[0034] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0036] The charging and discharging device provided in this embodiment of the utility model can achieve charging and discharging using a single interface by setting up a charging and discharging interface and a charging and discharging circuit. This avoids the problem in related technologies where electric suitcases are equipped with both charging input interfaces and discharging output interfaces, which increases the number of openings on the outer shell. This is beneficial to improving the aesthetics of the electric suitcase and thus enhancing the user's visual experience.

[0037] The following description, in conjunction with the accompanying drawings, provides an exemplary description of the charging and discharging device for an electric suitcase and the electric suitcase itself, as provided in the embodiments of this utility model.

[0038] Figure 1 This is a schematic diagram of the structure of a charging and discharging device provided in an embodiment of the present invention. The electric suitcase provided in this embodiment of the present invention includes a suitcase body, on which a receiving cavity is provided. Figure 1 The charging / discharging device shown is located within the receiving cavity. For example... Figure 1As shown, the charging and discharging device includes: a charging and discharging interface 10, a charging and discharging circuit 11, an energy storage unit 13, and a control chip 12. The charging and discharging interface 10 is connected to the energy storage unit 13 through the charging and discharging circuit 11. The control chip 12 is connected to the charging and discharging circuit 11 to control the charging and discharging circuit 11 to be in a charging state or a discharging state. The charging and discharging interface 10 is used to connect to a first external device or a second external device. When the charging and discharging interface 10 is connected to the first external device, the control chip 12 controls the charging and discharging circuit 11 to be in a charging state, and the first external device charges the energy storage unit 13. When the charging and discharging interface 10 is connected to the second external device, the control chip 12 controls the charging and discharging circuit 11 to be in a discharging state, and the energy storage unit 13 discharges the second external device.

[0039] Specifically, the charging and discharging device provided in this embodiment of the present invention includes a charging and discharging circuit 11 connected between the charging and discharging interface 10 and the energy storage unit 13. When the energy storage unit 13 needs to be charged, a first external device is connected to the charging and discharging interface 10, and the charging and discharging circuit 11 is controlled by the control chip 12 to be in a charging state, thereby enabling the first external device to store energy for the energy storage unit 13. When a second external device needs to be charged, i.e., the energy storage unit 13 is discharging, the charging and discharging circuit 11 is controlled by the control chip 12 to be in a discharging state, thereby enabling the energy storage unit 13 to charge the external device.

[0040] Therefore, by setting up a charging and discharging interface and a charging and discharging circuit, charging and discharging can be achieved by sharing a single interface. This avoids the problem of increasing the number of openings on the outer shell caused by configuring both a charging input interface and a discharging output interface on the electric suitcase in related technologies. This helps to improve the aesthetics of the electric suitcase and thus enhances the user's visual experience.

[0041] In some embodiments, Figure 2 This is a schematic diagram of another charging and discharging device provided in an embodiment of the present utility model. (In conjunction with...) Figure 1 and Figure 2 The charging and discharging circuit 11 includes a first switch Q1, a second switch Q2, a third switch Q3, a fourth switch Q4, and an inductor L;

[0042] The first terminal of the first switch Q1 is connected to the voltage terminal VBUS of the charging and discharging interface 10. The second terminal of the first switch Q1 is connected to the first terminal of the third switch Q3 through the inductor L. The second terminal of the third switch Q3 is connected to the energy storage unit 13.

[0043] The first terminal of the second switch Q2 is connected between the first switch Q1 and the inductor L, and the second terminal of the second switch Q2 is grounded; the first terminal of the fourth switch Q4 is connected between the third switch Q3 and the inductor L, and the second terminal of the fourth switch Q4 is grounded.

[0044] The control chip 12 is connected to the control terminal of each switch. The control chip 12 is used to control the conduction status of each switch so that the charging and discharging circuit 11 is in a charging state or a discharging state.

[0045] The energy storage unit 13 includes a battery (BAT). Specifically, a charging / discharging circuit 11 is provided, connected between the charging / discharging interface 10 and the energy storage unit 13. When the energy storage unit 13 needs to be charged, a first external device, such as a power bank, is connected to the charging / discharging interface 10. The control chip 12 controls the conduction of each switch, putting the charging / discharging circuit 11 in a charging state, thus enabling the power bank to store energy for the energy storage unit 13. When a second external device, such as a mobile phone, needs to be charged (i.e., the energy storage unit 13 discharges), the control chip 12 controls the conduction of each switch, putting the charging / discharging circuit 11 in a discharging state, thus enabling the energy storage unit 13 to charge the external device.

[0046] Therefore, by setting up the above-mentioned charging and discharging circuit, combined with the charging and discharging interface, charging and discharging can be achieved by sharing a single interface. This avoids the problem in related technologies where electric suitcases are equipped with both charging input interfaces and discharging output interfaces, which would increase the number of openings on the outer shell. This is beneficial to improving the aesthetics of the electric suitcase and thus enhancing the user's visual experience.

[0047] In some embodiments, such as Figure 2 As shown, the control chip 12 includes an external device identification terminal CC', and the charging / discharging interface 10 includes a detection pin CC; the external device identification terminal CC' and the detection pin CC.

[0048] Specifically, when an external device is connected to the charging / discharging interface 10, the detection pin CC outputs a corresponding detection signal. The external device identification terminal CC' obtains the type of the external device by acquiring the detection signal output by the detection pin CC.

[0049] For example, when the first external device is, for example but not limited to, a power bank, the external device identification terminal CC' can obtain the first detection signal output by the detection pin CC, such as a high-level signal. The control chip 12 controls the conduction status of each switch so that the charging and discharging circuit 11 is in a charging state, thereby enabling the first external device to charge and store energy for the energy storage unit 13 through the charging and discharging circuit 11. When the second external device is, for example but not limited to, a mobile phone, the external device identification terminal CC' can obtain the second detection signal output by the detection pin CC, such as a low-level signal. The control chip 12 controls the conduction status of each switch so that the charging and discharging circuit 11 is in a discharging state, thereby enabling the energy storage unit 13 to discharge and charge the second external device through the charging and discharging circuit 11.

[0050] In some embodiments, such as Figure 2As shown, the first switch Q1, the second switch Q2, the third switch Q3, and the fourth switch Q4 are all MOSFETs.

[0051] Specifically, the first switch Q1, the second switch Q2, the third switch Q3 and the fourth switch Q4 can be configured as N-channel metal-oxide-semiconductor (NMOS) transistors or P-channel metal-oxide-semiconductor (PMOS) transistors.

[0052] In other embodiments, the switching unit described above may be configured as a switching device well known to those skilled in the art, which is not limited here and will not be elaborated.

[0053] In some embodiments, such as Figure 2 As shown, the charging and discharging circuit 11 also includes:

[0054] The first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4;

[0055] The first terminal of the first capacitor C1 is connected to the control terminal of the first switch Q1, and the second terminal of the first capacitor C1 is connected between the second terminal of the first switch Q1 and the inductor L; the first terminal of the second capacitor C2 is connected to the control terminal of the second switch Q2, and the second terminal of the second capacitor C2 is grounded; the first terminal of the third capacitor C3 is connected to the control terminal of the third switch Q3, and the second terminal of the third capacitor C3 is connected between the first terminal of the third switch Q3 and the inductor L; the first terminal of the fourth capacitor C4 is connected to the control terminal of the fourth switch Q4, and the second terminal of the fourth capacitor C4 is grounded.

[0056] Specifically, a first capacitor C1 is provided so that when the control chip 12 outputs a control signal to the control terminal of the first switch Q1, the control terminal of the first switch Q1 can receive a stable control signal through the first capacitor C1; a second capacitor C2 is provided so that when the control chip 12 outputs a control signal to the control terminal of the second switch Q2, the control terminal of the second switch Q2 can receive a stable control signal through the second capacitor C2; a third capacitor C3 is provided so that when the control chip 12 outputs a control signal to the control terminal of the third switch Q3, the control terminal of the third switch Q3 can receive a stable control signal through the third capacitor C3; and a fourth capacitor C4 is provided so that when the control chip 12 outputs a control signal to the control terminal of the fourth switch Q4, the control terminal of the fourth switch Q4 can receive a stable control signal through the fourth capacitor C4.

[0057] For example, such as Figure 2As shown, the control chip 12 includes a first driving terminal V1, a second driving terminal V2, a third driving terminal V3, and a fourth driving terminal V4. The first driving terminal V1 is connected to the driving terminal of the first switch Q1, the second driving terminal V2 is connected to the driving terminal of the second switch Q2, the third driving terminal V3 is connected to the driving terminal of the third switch Q3, and the fourth driving terminal V4 is connected to the driving terminal of the fourth switch Q4. Therefore, the control chip 12 can output control signals to the control terminals of each switch to correspond to the on / off state of each switch.

[0058] In some embodiments, such as Figure 2 As shown, the charging and discharging circuit 11 is in the charging stage. The charging and discharging circuit 11 works periodically, and each working cycle includes a front cycle and a back cycle. In the front cycle, the first switch Q1 and the fourth switch Q4 are turned on, and the second switch Q2 and the third switch Q3 are turned off. In the back cycle, the first switch Q1 and the fourth switch Q4 are turned off, and the second switch Q2 and the third switch Q3 are turned on.

[0059] Specifically, during the charging phase of the charging / discharging circuit 11, in the first cycle, current flows from the voltage terminal VBUS through the first conducting switch Q1 into the inductor L, and then to ground through the fourth conducting switch Q4. Because the inductor L has the characteristic of impeding current changes, it stores magnetic field energy during this process. In the second cycle, the magnetic field energy stored in the inductor L begins to be released, generating an induced electromotive force. The current in the inductor L flows through the third conducting switch Q3 to the energy storage unit 13, charging the battery.

[0060] In some embodiments, such as Figure 2 As shown, the charging and discharging circuit 11 is in the discharging stage. The charging and discharging circuit 11 works periodically, and each working cycle includes a front cycle and a back cycle. In the front cycle, the second switch Q2 and the third switch Q3 are turned on, and the first switch Q1 and the fourth switch Q4 are turned off. In the back cycle, the second switch Q2 and the third switch Q3 are turned off, and the first switch Q1 and the fourth switch Q4 are turned on.

[0061] Specifically, during the discharge phase of the charging and discharging circuit 11, in the first cycle, the battery current flows into the inductor L through the conducting third switch Q3, and then returns to the battery through the conducting second switch Q2. The inductor L stores magnetic field energy. In the second cycle, the magnetic field energy stored in the inductor L is released, generating an induced electromotive force higher than the battery voltage. The current flows to the voltage terminal VBUS of the charging and discharging interface 10 through the conducting first switch Q1, thereby charging the external device.

[0062] In some embodiments, Figure 3 This is a schematic diagram of another charging / discharging interface circuit provided in an embodiment of the present utility model. (See attached diagram.) Figure 3As shown, the charging and discharging device also includes a protection unit 14, which is located between the first end of the first switch Q1 and the voltage terminal VBUS of the charging and discharging interface 10.

[0063] Specifically, the protection unit 14 includes a fifth switch Q5 and a sixth switch Q6; the fifth switch Q5 and the sixth switch Q6 are connected in parallel. When charging is not required or an abnormal situation occurs (such as overcharging or overcurrent), the control chip 12 controls the fifth switch Q5 and the sixth switch Q6 to turn off, cutting off the current path and providing protection. In addition, by setting up the protection unit 14, reverse current flow can also be prevented, avoiding current from flowing back into the voltage terminal VBUS of the charging / discharging interface 10 from the subsequent circuit, thus protecting the charging / discharging interface 10 and other related circuit components.

[0064] For example, the control chip 12 is provided with a fifth drive terminal V5, and the control terminals of the fifth switch Q5 and the sixth switch Q6 are both connected to the fifth drive terminal V5.

[0065] In some embodiments, such as Figure 3 As shown, the charging and discharging device also includes a first resistor R1, a second resistor R2, and a third resistor R3. The voltage terminal VBUS of the charging and discharging interface 10 is connected to the protection unit 14 via the first resistor R1, and the protection unit 14 is connected to the first switch Q1 via the second resistor R2. The third switch Q3 is connected to the energy storage unit 13 via the third resistor R3.

[0066] In some embodiments, continue as follows Figure 3 As shown, the charging and discharging device also includes a diode D. The first end of the diode D is connected between the voltage terminal VBUS and the first resistor R1, and the second end of the diode D is grounded.

[0067] Specifically, when an external device is connected to the charging / discharging interface 10, the external device may introduce surge current or voltage. The diode can absorb this surge energy to prevent the surge from impacting the charging / discharging interface 10, thereby improving the circuit's anti-interference and reliability.

[0068] Based on the above embodiments, this utility model also provides an electric suitcase, including the charging and discharging device as described in the above embodiments, and thus has the same or similar beneficial effects, which will not be repeated here.

[0069] The terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0070] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this utility model is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the aforementioned inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features of the utility model in this utility model that have similar functions.

Claims

1. A charging and discharging device for electric suitcases, characterized in that, The electric suitcase includes a suitcase body with a receiving cavity, and the charging / discharging device is located in the receiving cavity. The charging / discharging device includes: The system includes a charging / discharging interface, a charging / discharging circuit, an energy storage unit, and a control chip. The charging / discharging interface is connected to the energy storage unit through the charging / discharging circuit. The control chip is connected to the charging / discharging circuit to control the charging / discharging circuit to be in a charging or discharging state. The charging / discharging interface is used to connect to a first external device or a second external device; when the charging / discharging interface is connected to the first external device, the control chip controls the charging / discharging circuit to be in a charging state, and the first external device charges the energy storage unit; The charging / discharging interface is connected to the second external device, the control chip controls the charging / discharging circuit to be in a discharging state, and the energy storage unit discharges the second external device.

2. The charging and discharging device according to claim 1, characterized in that, The charging and discharging circuit includes a first switch, a second switch, a third switch, a fourth switch, and an inductor; The first terminal of the first switch is connected to the voltage terminal of the charging and discharging interface, the second terminal of the first switch is connected to the first terminal of the third switch through the inductor, and the second terminal of the third switch is connected to the energy storage unit. The first terminal of the second switch is connected between the first switch and the inductor, and the second terminal of the second switch is grounded; the first terminal of the fourth switch is connected between the third switch and the inductor, and the second terminal of the fourth switch is grounded. The control chip is connected to the control terminal of each of the switches, and the control chip is used to control the conduction status of each of the switches so that the charging and discharging circuit is in a charging state or a discharging state.

3. The charging and discharging device according to claim 1, characterized in that, The control chip includes an external device identification terminal, and the charging / discharging interface includes a detection pin; the external device identification terminal is connected to the detection pin.

4. The charging and discharging device according to claim 2, characterized in that, The first switch, the second switch, the third switch, and the fourth switch are all MOSFETs.

5. The charging and discharging device according to claim 2, characterized in that, The charging and discharging circuit also includes: The first capacitor, the second capacitor, the third capacitor, and the fourth capacitor; The first terminal of the first capacitor is connected to the control terminal of the first switch, and the second terminal of the first capacitor is connected between the second terminal of the first switch and the inductor; the first terminal of the second capacitor is connected to the control terminal of the second switch, and the second terminal of the second capacitor is grounded; the first terminal of the third capacitor is connected to the control terminal of the third switch, and the second terminal of the third capacitor is connected between the first terminal of the third switch and the inductor; the first terminal of the fourth capacitor is connected to the control terminal of the fourth switch, and the second terminal of the fourth capacitor is grounded.

6. The charging and discharging device according to claim 2, characterized in that, The charging and discharging circuit is in the charging phase, and the charging and discharging circuit operates periodically. Each working cycle includes a preceding cycle and a following cycle. In the preceding cycle, the first switch and the fourth switch are turned on, and the second switch and the third switch are turned off. In the following cycle, the first switch and the fourth switch are turned off, and the second switch and the third switch are turned on.

7. The charging and discharging device according to claim 2, characterized in that, The charging and discharging circuit is in the discharging phase, and the charging and discharging circuit operates periodically. Each working cycle includes a preceding cycle and a following cycle. In the preceding cycle, the second and third switches are turned on, and the first and fourth switches are turned off. In the following cycle, the second and third switches are turned off, and the first and fourth switches are turned on.

8. The charging and discharging device according to claim 2, characterized in that, Also includes: A protection unit is located between the first terminal of the first switch and the voltage terminal of the charging / discharging interface.

9. The charging and discharging device according to claim 8, characterized in that, The protection unit includes a fifth switch and a sixth switch; The fifth switch and the sixth switch are connected in parallel.

10. An electric suitcase, characterized in that, Includes the charging and discharging device as described in any one of claims 1-9.

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