CN219513827U

CN219513827U - Mobile device and charging and discharging system

Info

Publication number: CN219513827U
Application number: CN202320543640.1U
Authority: CN
Inventors: 高勇建
Original assignee: Beijing Rhinoceros Yunhang Technology Co ltd
Current assignee: Beijing Rhinoceros Yunhang Technology Co ltd
Priority date: 2023-03-15
Filing date: 2023-03-15
Publication date: 2023-08-11
Anticipated expiration: 2033-03-15

Abstract

The utility model discloses a mobile device and a charging and discharging system. The mobile device includes: at least one battery for receiving and storing electrical energy; the battery backboard is electrically connected with the battery pack through the first input and output port, is electrically connected with the charging device through the second input and output port and is used for establishing communication between the battery pack and the charging device, receiving electric energy output by the charging device and transmitting the electric energy to the battery pack. According to the utility model, the safety of the mobile device in the charging and discharging processes can be improved by adding the battery backboard.

Description

Mobile device and charging and discharging system

Technical Field

The utility model relates to the technical field of charging and discharging of mobile devices, in particular to a mobile device and a charging and discharging system.

Background

At present, in a mobile device powered by a battery pack, the battery pack is generally managed, controlled and used by a battery management system, so that the utilization rate of the battery pack is improved, the battery pack is prevented from being overcharged and overdischarged, and the service life of a battery is prolonged. However, due to limitations of the battery management system itself, the battery management system is susceptible to failure and malfunction during use of the mobile device. Meanwhile, safety accidents easily occur when a large current is input into the battery management system, and the safety of the mobile device cannot be guaranteed. Therefore, the prior art has a problem of low safety.

Disclosure of Invention

An objective of the embodiments of the present utility model is to provide a mobile device and a charging and discharging system, which are used for solving the problem of low safety of the mobile device in the prior art.

In order to achieve the above object, a first aspect of the present utility model provides a mobile device electrically connected to a charging device, the mobile device comprising:

at least one battery for receiving and storing electrical energy;

the battery backboard is electrically connected with the battery pack through the first input and output port, is electrically connected with the charging device through the second input and output port and is used for establishing communication between the battery pack and the charging device, receiving electric energy output by the charging device and transmitting the electric energy to the battery pack.

In the embodiment of the utility model, the battery backboard further comprises a battery backboard discharging MOS tube, the drain electrode of the battery backboard discharging MOS tube is electrically connected with the independent charging port of the first input/output port, and the source electrode of the battery backboard discharging MOS tube is electrically connected with the second input/output port for controlling the on-off of a circuit in the battery backboard.

In the embodiment of the utility model, the battery backboard further comprises a battery backboard micro-control unit which is electrically connected with the grid electrode of the battery backboard discharging MOS tube and used for controlling the switch of the battery backboard discharging MOS tube.

In an embodiment of the utility model, the battery back plate further comprises a first DC-DC converter for converting an input voltage into a set output voltage.

In the embodiment of the utility model, the battery backboard further comprises a diode, one end of the diode is electrically connected with the battery backboard micro-control unit, and the other end of the diode is electrically connected with the first DC-DC converter and is used for preventing current from flowing backwards.

In an embodiment of the present utility model, each battery pack further includes:

a battery for storing electrical energy and providing electrical energy to the mobile device;

the first micro control unit is used for controlling the switch of the first charging MOS tube and the switch of the first discharging MOS tube;

one end of the third input/output port is electrically connected with the first micro control unit, and the other end of the third input/output port is electrically connected with the cathode of the battery and is used for transmitting electric energy and signals;

the source electrode of the first charging MOS tube is electrically connected with the anode of the battery, the drain electrode of the first charging MOS tube is respectively electrically connected with the third input/output port and the drain electrode of the first discharging MOS tube, and the grid electrode of the first charging MOS tube is electrically connected with the first micro-control unit and is used for controlling the on-off of a circuit in the battery pack;

and the grid electrode of the first discharge MOS tube is electrically connected with the first micro-control unit and is used for controlling the on-off of a circuit in the battery pack.

In an embodiment of the utility model, each battery pack further comprises a second DC-DC converter for converting the input voltage into a set output voltage.

In an embodiment of the present utility model, each battery pack further includes a self-recovering fuse for protecting the circuits in the battery pack.

A second aspect of the present utility model provides a charging and discharging system of a mobile device, including:

the mobile device;

and the charging device is electrically connected with the mobile device and is used for outputting electric energy to the mobile device.

In an embodiment of the present utility model, a charging device includes:

the charger switching power supply is used for converting input alternating current into direct current;

the source electrode of the second charging MOS tube is electrically connected with the output end of the charger switching power supply and is used for controlling the on-off of a circuit in the charging device;

the drain electrode of the second discharging MOS tube is electrically connected with the drain electrode of the second charging MOS tube and is used for controlling the on-off of a circuit in the charging device;

one end of the second micro control unit is electrically connected with the grid electrode of the second charging MOS tube, and the other end of the second micro control unit is electrically connected with the grid electrode of the second discharging MOS tube and is used for controlling the second charging MOS tube and the switch of the second discharging MOS tube;

and one end of the fourth input/output port is electrically connected with the source electrode of the second discharge MOS tube, and the other end of the fourth input/output port is electrically connected with the second micro-control unit and is used for transmitting electric energy and signals.

According to the embodiment of the utility model, at least one battery pack and the battery backboard are arranged in the mobile device, so that the communication between the battery pack and the charging device can be established through the battery backboard, and the electric energy output by the charging device is received through the battery backboard and is transmitted to the battery pack. The safety of the mobile device can be improved while the power transmission requirements and the communication requirements of the mobile device and the charging device are met.

Additional features and advantages of embodiments of the utility model will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain, without limitation, the embodiments of the utility model. In the drawings:

FIG. 1 schematically illustrates a block diagram of a mobile device according to an embodiment of the utility model;

fig. 2 schematically shows a block diagram of a charge and discharge system of a mobile device according to an embodiment of the present utility model.

Description of the reference numerals

1. Battery pack 2 battery backboard

3. Charging device 101 battery

102. Third input/output port of first micro control unit 103

104. First charging MOS tube 105 first discharging MOS tube

106. Second DC-DC converter 107 self-recovery fuse

201. Battery backboard micro-control unit of battery backboard discharging MOS tube 202

203. First DC-DC converter 204 diode

205. First input output port 206 second input output port

301. Charger switching power supply 302 second charging MOS tube

303. Second discharge MOS transistor 304 second micro control unit

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it should be understood that the detailed description described herein is merely for illustrating and explaining the embodiments of the present utility model, and is not intended to limit the embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The mobile device provided by the embodiment of the utility model can be an unmanned aerial vehicle, a robot or other types of mobile devices. For simplicity of description, embodiments herein will be described below mainly taking a mobile device as an example of a drone.

Fig. 1 schematically shows a block diagram of a mobile device according to an embodiment of the utility model. As shown in fig. 1, a represents independent charging, B represents discharging parallel, C represents TS wakeup, 202a represents a machine top on/off button and LED interface, 206a represents a left foot rest glass fiber tube, 206B represents a right foot rest glass fiber tube, 206C represents a left foot rest charging interface board, and 206d represents a right foot rest charging interface board. An embodiment of the present utility model provides a mobile device, which is electrically connected with a charging device, and includes:

at least one battery 1 for receiving and storing electrical energy;

the battery backboard 2 is electrically connected with the battery pack 1 through the first input/output port 205, is electrically connected with the charging device through the second input/output port 206, and is used for establishing communication between the battery pack 1 and the charging device, receiving electric energy output by the charging device, and transmitting the electric energy to the battery pack 1.

In the embodiment of the utility model, the mobile device is electrically connected with the charging device so as to meet the requirements of the mobile device and the charging device for communication and the charging of the mobile device by the charging device. The mobile device comprises at least one battery pack 1 and a battery back plate 2, and the battery pack 1 provides electric energy for the operation of the battery back plate 2. The number of the battery packs 1 may be one or a plurality, and may be set according to actual conditions.

The battery back plate 2 may include a first input-output port 205 and a second input-output port 206. The second input/output port 206 is provided on the left and right stand glass fiber tubes. In one example, the first input output port 205 may be a 12 pin interface input output port. Wherein, 1 needle is the independent charge port, 1 needle is the wake-up lead wire, 2 needles are CAN bus, 4 needles are battery charge-discharge main loop, and 4 needles are electric wire ground terminal. The second input output port 206 may be a 4-pin interface input output port. Wherein, 1 needle is the power, 1 needle is the electric wire ground terminal, and 2 needles are CAN bus.

The battery backboard 2 is electrically connected with the battery pack 1 through the first input/output port 205 and electrically connected with the charging device through the second input/output port 206, and can be used for establishing communication between the battery pack 1 and the charging device, receiving electric energy output by the charging device, and transmitting the electric energy to the battery pack 1, namely, being used as a communication hub and a charging hub of the battery pack 1 and the charging device. In this way, the safety of the mobile device in the charging and discharging process can be ensured by adding the battery backboard 2.

By arranging at least one battery pack 1 and a battery backboard 2 in the mobile device, the embodiment of the utility model can establish communication between the battery pack 1 and the charging device through the battery backboard 2, and can receive electric energy output by the charging device through the battery backboard 2 and transmit the electric energy to the battery pack 1. The safety of the mobile device can be improved while the power transmission requirements and the communication requirements of the mobile device and the charging device are met.

As shown in fig. 1, in the embodiment of the present utility model, the battery backboard 2 may further include a battery backboard discharge MOS tube 201, where a drain electrode of the battery backboard discharge MOS tube 201 is electrically connected with an independent charging port of the first input/output port 205, and a source electrode of the battery backboard discharge MOS tube 201 is electrically connected with the second input/output port 206, so as to control on/off of a circuit in the battery backboard 2.

Specifically, the battery back plate 2 further includes a battery back plate discharge MOS transistor 201. The number of the battery backboard discharge MOS tubes 201 is equal to the number of the battery packs 1. In one example, two battery packs 1 are provided in the mobile device, and then each battery pack 1 has a corresponding battery back plate discharge MOS tube 201. The drain electrode of the battery backboard discharging MOS tube 201 is electrically connected with the independent charging port of the first input/output port 205, the source electrode of the battery backboard discharging MOS tube 201 is electrically connected with the second input/output port 206, and the grid electrode of the battery backboard discharging MOS tube 201 is electrically connected with the battery backboard micro-control unit 202. The battery backboard discharging MOS tube 201 is used for controlling the on-off of a circuit in the battery backboard 2, so that the possibility of damage to the mobile device caused by the input of a large current is reduced, and the safety of the mobile device is ensured.

As shown in fig. 1, in the embodiment of the present utility model, the battery back plate 2 may further include a battery back plate micro-control unit 202 electrically connected to the gate of the battery back plate discharging MOS transistor 201, for controlling the switch of the battery back plate discharging MOS transistor 201.

Specifically, the battery back plate 2 further includes a battery back plate micro control unit 202. Based on the battery back plate micro control unit 202, the battery back plate 2 can be used as a center of the battery pack 1 and the charging device. The battery backboard micro-control unit 202 is electrically connected with the grid electrode of the battery backboard discharging MOS tube 201, and can be used for controlling the switch of the battery backboard discharging MOS tube 201, and further controlling the on-off of a circuit in the battery backboard 2. In addition, the battery backboard micro-control unit 202 can also control the switch controller, so that the function of switching on and switching off in the charging process can be realized.

As shown in fig. 1, in the embodiment of the present utility model, the battery back plate 2 may further include a first DC-DC converter 203 for converting an input voltage into a set output voltage.

Specifically, the battery back plate 2 further includes a first DC-DC converter 203. One end of the first DC-DC converter 203 is electrically connected to the drain of the battery back plate discharge MOS transistor 201, and the other end is electrically connected to the diode 204. The first DC-DC converter 203 may be used to convert an input voltage into a set output voltage so that voltages between the branch circuits are balanced. The first DC-DC converter 203 is preferably an ultra low quiescent current DC-DC converter. In this way, the diode 204 is prevented from being broken down by a large current, and power consumption is reduced to the greatest extent.

As shown in fig. 1, in the embodiment of the present utility model, the battery back plate 2 may further include a diode 204, one end of the diode 204 is electrically connected to the battery back plate micro control unit 202, and the other end is electrically connected to the first DC-DC converter 203 for preventing current from flowing backward.

Specifically, the battery back plate 2 further includes a diode 204. The number of diodes 204 is adapted to the number of battery packs 1. When a plurality of diodes 204 are provided, the plurality of diodes 204 are connected in parallel with each other. One end of the diode 204 is electrically connected to the battery back plate micro control unit 202, and the other end is electrically connected to the first DC-DC converter 203, and can be used to prevent current from flowing backward. By adding a circuit, in which the battery backboard discharging MOS tube 201 is electrically connected with the first DC-DC converter 203, the first DC-DC converter 203 is electrically connected with the diode 204 and the diode 204 is electrically connected with the battery backboard micro-control unit 202, in the battery backboard 2, the circuit safety of the mobile device can be protected, and the possibility of occurrence of safety accidents can be reduced.

As shown in fig. 1, in the embodiment of the present utility model, each battery pack 1 may further include:

a battery 101 for storing electrical energy and providing electrical energy to the mobile device;

a first micro control unit 102, configured to control the switches of the first charge MOS transistor 104 and the first discharge MOS transistor 105;

a third input/output port 103, wherein one end of the third input/output port 103 is electrically connected with the first micro control unit 102, and the other end is electrically connected with the negative electrode of the battery 101, and is used for transmitting electric energy and signals;

the source electrode of the first charging MOS tube 104 is electrically connected with the positive electrode of the battery 101, the drain electrode of the first charging MOS tube 104 is electrically connected with the third input/output port 103 and the drain electrode of the first discharging MOS tube 105 respectively, and the grid electrode of the first charging MOS tube 104 is electrically connected with the first micro-control unit 102 for controlling the on-off of the circuit in the battery pack 1;

the source electrode of the first discharge MOS tube 105 is electrically connected with the third input/output port 103, and the grid electrode of the first discharge MOS tube 105 is electrically connected with the first micro-control unit 102 for controlling the on-off of the circuit in the battery pack 1.

Specifically, the mobile device may include at least one battery pack 1, and each battery pack 1 may include a battery 101, a first micro control unit 102, a third input output port 103, a first charge MOS transistor 104, and a first discharge MOS transistor 105. The battery 101 is used to store electrical energy and provide electrical energy to the mobile device. The first micro-control unit 102 may control on or off of the first charge MOS transistor 104 and the first discharge MOS transistor 105. In the battery pack 1, one end of the third input/output port 103 is electrically connected to the first micro control unit 102, and the other end is electrically connected to the negative electrode of the battery 101. Meanwhile, the third input/output port 103 may be externally connected to a charging power supply or a powered device. The third input output port 103 may be connected to the first input output port 205 of the battery back plate 2, so that electric power and signals may be transmitted between the battery pack 1 and the battery back plate 2. In one example, the third input output port 103 of the battery pack 1 may be a 12 pin interface input output port, like the first input output port 205.

After the battery pack 1 is connected with the first input/output port 205 of the battery back plate 2 through the third input/output port 103, current sequentially flows through the first charge MOS tube 104, the first discharge MOS tube 105, the third input/output port 103 and the first input/output port 205 from the positive electrode of the battery 101, then flows to each load of the mobile device, then flows through the first input/output port 205 and the third input/output port 103, finally flows to the negative electrode of the battery 101, and a current main loop of the battery pack 1 is formed.

The source electrode of the first charging MOS tube 104 is electrically connected with the positive electrode of the battery 101, the drain electrode of the first charging MOS tube 104 is electrically connected with the drain electrode of the first discharging MOS tube 105, and the gate electrode of the first charging MOS tube 104 is electrically connected with the first micro-control unit 102, which can be used for controlling the on-off of the circuit in the battery pack 1. The source electrode of the first discharging MOS tube 105 is electrically connected to the third input/output port 103, and the gate electrode of the first discharging MOS tube 105 is electrically connected to the first micro-control unit 102, which can be used to control the on/off of the circuit in the battery pack 1. The directions in which the currents of the first charge MOS transistor 104 and the first discharge MOS transistor 105 can flow are different. In addition, a branch parallel to the first discharging MOS transistor 105 is further disposed between the drain of the first charging MOS transistor 104 and the drain of the first discharging MOS transistor 105, so that the drain of the first charging MOS transistor 104 can be directly electrically connected to the third input/output port 103.

As shown in fig. 1, in the embodiment of the present utility model, each battery pack 1 may further include a second DC-DC converter 106, and the second DC-DC converter 106 is configured to convert an input voltage into a set output voltage.

Specifically, each battery pack 1 may further include a second DC-DC converter 106. The second DC-DC converter 106 may convert the input voltage into a set output voltage.

Fig. 2 schematically shows a block diagram of a charge and discharge system of a mobile device according to an embodiment of the present utility model. As shown in fig. 2, in an embodiment of the present utility model, each battery pack 1 may further include a self-recovering fuse 107, and the self-recovering fuse 107 is used to protect the circuit in the battery pack 1.

Specifically, each battery pack 1 may also self-restore the insurance 107. The self-healing fuse 107 is an overcurrent electronic protection element having overcurrent protection and automatic healing functions. In an embodiment of the present utility model, self-healing insurance 107 may be used to protect the circuitry in battery pack 1.

As shown in fig. 2, an embodiment of the present utility model provides a charging and discharging system of a mobile device, which may include:

the mobile device;

and the charging device 3 is electrically connected with the mobile device and is used for outputting electric energy to the mobile device.

Specifically, the charge and discharge system of the mobile device includes the mobile device and the charging device 3. The mobile device comprises at least one battery pack 1 and a battery back plate 2. The mobile device is electrically connected to the charging device 3. The mobile device may receive the power transmitted by the charging device 3 and store the power. The charging device 3 may output electric power to the mobile device, thereby realizing the function of charging the mobile device by the charging device 3.

As shown in fig. 2, in an embodiment of the present utility model, the charging device 3 may include:

a charger switching power supply 301 for converting an input alternating current into a direct current;

the source electrode of the second charging MOS tube 302 is electrically connected with the output end of the charger switching power supply 301 and is used for controlling the on-off of a circuit in the charging device 3;

the drain electrode of the second discharging MOS tube 303 is electrically connected with the drain electrode of the second charging MOS tube 302 and is used for controlling the on-off of a circuit in the charging device 3;

the second micro-control unit 304, one end of the second micro-control unit 304 is electrically connected with the gate of the second charging MOS tube 302, and the other end is electrically connected with the gate of the second discharging MOS tube 303, for controlling the switching of the second charging MOS tube 302 and the second discharging MOS tube 303;

and one end of the fourth input/output port is electrically connected with the source electrode of the second discharge MOS tube 303, and the other end of the fourth input/output port is electrically connected with the second micro-control unit 304 and is used for transmitting electric energy and signals.

Specifically, the charging device 3 may include a charger switching power supply 301, a second charging MOS transistor 302, a second discharging MOS transistor 303, a second micro-control unit 304, and a fourth input-output port (not shown in the figure). The charger switching power supply 301 may convert alternating current to direct current. The source electrode of the second charging MOS tube 302 is electrically connected to the output end of the charger switching power supply 301, so as to control the on-off of the circuit in the charging device 3. The drain electrode of the second discharging MOS transistor 303 is electrically connected to the drain electrode of the second charging MOS transistor 302, so as to control the on/off of the circuit in the charging device 3. The directions in which the currents of the second charge MOS transistor 302 and the second discharge MOS transistor 303 can flow are different. One end of the second micro-control unit 304 is electrically connected with the gate of the second charging MOS tube 302, and the other end is electrically connected with the gate of the second discharging MOS tube 303, so as to control the switch of the second charging MOS tube 302 and the second discharging MOS tube 303, and further control the on-off of the circuit.

One end of the fourth input/output port is electrically connected to the source of the second discharge MOS transistor 303, and the other end is electrically connected to the second micro control unit 304. The fourth input/output port is a 4-pin input/output port and can be electrically connected with the second input/output port of the battery backboard 2 so as to realize power transmission and signal transmission of the battery backboard 2 in the charging device 3 and the mobile device. In one example, the fourth input output port of the charging device may be a 4 pin interface input output port, as with the second input output port 206.

The number of the charger switching power supply 301, the second charging MOS transistor 302, the second discharging MOS transistor 303, and the fourth input/output port may be equal to the number of the battery packs 1, respectively. When the plurality of charger switching power supplies 301, the second charging MOS transistors 302, the second discharging MOS transistors 303, and the fourth input/output ports are provided, the plurality of charger switching power supplies 301 are connected in parallel, the plurality of second charging MOS transistors 302 are connected in parallel, the plurality of second discharging MOS transistors 303 are connected in parallel, and the plurality of fourth input/output ports are connected in parallel. When a plurality of battery packs 1 are provided, the number of the charger switching power supplies 301 may be one.

In this way, the electric energy is sequentially transferred from the charger switching power supply 301 to the second charging MOS transistor 302, the second discharging MOS transistor 303, the battery back plate discharging MOS transistor 201, and the first charging MOS transistor 104, and finally transferred to the battery 101, thereby completing the process of charging the mobile device by the charging device 3.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.

The foregoing is merely exemplary of the present utility model and is not intended to limit the present utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are to be included in the scope of the claims of the present utility model.

Claims

1. A mobile device, wherein the mobile device is electrically connected to a charging device, the mobile device comprising:

at least one battery for receiving and storing electrical energy;

the battery backboard is electrically connected with the battery pack through a first input/output port, is electrically connected with the charging device through a second input/output port, and is used for establishing communication between the battery pack and the charging device, receiving electric energy output by the charging device and transmitting the electric energy to the battery pack.

2. The mobile device of claim 1, wherein the battery back plate further comprises a battery back plate discharge MOS tube, a drain electrode of the battery back plate discharge MOS tube is electrically connected to an independent charging port of the first input/output port, and a source electrode of the battery back plate discharge MOS tube is electrically connected to the second input/output port for controlling on/off of a circuit in the battery back plate.

3. The mobile device of claim 2, wherein the battery back plate further comprises a battery back plate micro-control unit electrically connected to the gate of the battery back plate discharge MOS transistor for controlling the switching of the battery back plate discharge MOS transistor.

4. A mobile device according to claim 3, wherein the battery back plate further comprises a first DC-DC converter for converting an input voltage to a set output voltage.

5. The mobile device of claim 4, wherein the battery back plate further comprises a diode having one end electrically connected to the battery back plate micro-control unit and the other end electrically connected to the first DC-DC converter for preventing current backflow.

6. The mobile device of claim 1, wherein each of the battery packs further comprises:

one end of the third input/output port is electrically connected with the first micro control unit, and the other end of the third input/output port is electrically connected with the negative electrode of the battery and is used for transmitting electric energy and signals;

the first discharging MOS tube is characterized in that a source electrode of the first discharging MOS tube is electrically connected with the third input/output port, and a grid electrode of the first discharging MOS tube is electrically connected with the first micro-control unit and used for controlling on-off of a circuit in the battery pack.

7. The mobile device of claim 6, wherein each of the battery packs further comprises a second DC-DC converter for converting an input voltage to a set output voltage.

8. The mobile device of claim 6, wherein each of the battery packs further comprises a self-healing fuse for protecting circuitry in the battery pack.

9. A charging and discharging system of a mobile device, comprising:

the mobile device of any one of claims 1 to 8;

10. The charge and discharge system according to claim 9, wherein the charging device includes:

the second micro control unit is electrically connected with the grid electrode of the second charging MOS tube at one end and the grid electrode of the second discharging MOS tube at the other end, and is used for controlling the second charging MOS tube and the switch of the second discharging MOS tube;