KR101123058B1 - Wireless Device Using Universal Serial Bus for Charging and Discharging - Google Patents

Abstract

According to the present invention, N (N≥2) battery cells or banks are built in a pack case, and the outer surface of the pack case includes N universal serial bus (USB) ports capable of performing input and output for charging and discharging. Battery pack is installed; N small-capacity USB terminals usable in _a predetermined range of voltages (V _a ) and corresponding to the USB port, and electrically connected to the small-capacity USB terminals and having a voltage range greater than V _a (V _b : V _b ≥ Charging / discharging connection device including one or n large capacity USB terminals usable in V _a ); And a number of USB ports corresponding to the large-capacity USB terminal, and transmits electricity supplied from an external power source to the charging / discharging connection device when the battery pack is charged, and discharges the battery pack while the external power source is cut off. A device body supplied with electricity from the charging / discharging connection device; Provided is a wireless device configured as.

Description

Wireless Device Using Universal Serial Bus for Charging and Discharging

The present invention relates to a wireless device for charging and discharging using a general-purpose serial bus, and more particularly, N (N≥2) battery cells or banks are built in the pack case, the input and charge for charging and discharging A battery pack equipped with N universal serial bus (USB) ports capable of outputting, a charging / discharging device including a small capacity USB terminal and a large capacity USB terminal, and a number of USB ports corresponding to the large capacity USB terminal are provided. It includes, and the electric power supplied from the external power supply when charging the battery pack to the charging and discharging connection device, and when the battery pack is discharged in the state that the external power is cut off to the device main body to receive electricity from the charging and discharging connection device It relates to a wireless device configured.

As technology development and demand for mobile devices increase, the demand for secondary batteries as energy sources is rapidly increasing.

The secondary battery may be used in the form of a single battery, or in the form of a battery pack in which a plurality of unit cells are electrically connected, depending on the type of external device in which the secondary battery is used. For example, a small device such as a mobile phone can operate for a predetermined period of time with the output and capacity of one battery, while a medium or large size such as a notebook computer, a portable DVD, a small PC, an electric vehicle, a hybrid electric vehicle, or the like. Large devices require the use of battery packs due to power and capacity issues.

The battery pack is manufactured by connecting a plurality of unit cells arranged in series or in parallel and mounting a core pack including a protection circuit module and the like inside the pack case. In the case of using a rectangular or pouch type battery as a unit cell, it can be easily manufactured by stacking the wide surfaces to face each other and then connecting the electrode terminals by a connection member such as a bus bar. Therefore, in the case of manufacturing a three-dimensional battery pack having a hexahedral structure, a square or pouch type battery is advantageous as a unit cell.

On the other hand, the cylindrical battery generally has a larger capacitance than the square and pouch type batteries, but due to the external characteristics of the cylindrical battery is not easy to arrange in a laminated structure. However, when the shape of the battery pack is a linear or plate-like structure as a whole, there is a structural advantage over the square or pouch type.

Therefore, in the case of a notebook computer, a portable DVD, a small PC, and the like, battery packs in which a plurality of cylindrical batteries are connected in parallel and in series are used. As the structure of the core pack used for such a battery pack, for example, a linear structure of 2P (parallel) -3S (serial), a plate structure of 2P-3S, a linear structure of 2P-4S, a plate structure of 2P-4S, and the like. Is being used.

The parallel connection structure is achieved by arranging two or more cylindrical cells adjacent in their lateral direction with electrode terminals oriented in the same direction, and welding the bus bars. Such parallel cylindrical cells are also referred to as "banks".

In series connection structure, two or more cylindrical cells are arranged in a lateral direction while two or more cylindrical cells are arranged long so that electrode terminals of opposite polarity are continuous or the electrode terminals are arranged in opposite directions. This is achieved by arranging adjacently in the furnace and then welding the bus bar.

In the electrical connection of such cylindrical cells, spot welding is generally performed using a thin plate-shaped bus bar such as a nickel plate. In addition, a battery pack is manufactured by connecting a protection circuit module to a core pack consisting of a parallel or series connection.

On the other hand, a battery pack mounted on a device such as a notebook computer has a problem in that when the battery pack is used up, the battery pack is discharged to a full state and the battery pack cannot be charged unless an AC (AC) adapter is connected.

In particular, when you need to use the battery pack on the go or on a business trip urgently without the AC power, there is a problem that you always have to carry an extra battery pack because it can not be charged.

In addition, even when using the spare battery pack, there is a problem in that the battery pack can not be used in common for the device because the connector structure for connecting the device and the battery pack is different for each battery pack manufacturer or model.

Furthermore, if you want to use the USB port that is common to the notebook computer, the maximum output voltage of the USB port is 5 V, so the notebook computer's USB port is not suitable for the battery pack charging voltage of 12.6 V to 16.8 V. There is a problem that cannot be used.

Therefore, there is a high need for a charging / discharging connection device and a wireless device including the same, which have a structure in which a battery pack can be commonly used regardless of the type of device so as to fundamentally solve these problems.

The present invention aims to solve the problems of the prior art and the technical problems that have been requested from the past.

Specifically, an object of the present invention by using a universal serial bus (USB) when charging and discharging the battery pack to achieve ease of use, to enable the common use, and to change the voltage to suit the charge and discharge of the battery pack It is to provide a wireless device configured to.

In addition, another object of the present invention is to provide a charge and discharge connection device that can easily change the voltage and can easily achieve charge and discharge regardless of the type of battery pack when the battery pack and the device body is electrically connected.

Therefore, the wireless device according to the present invention for achieving this object is

N electrically connected (N≥2) battery cells or banks are built into the pack case, and the outer surface of the pack case has N universal serial bus (USB) ports for input and output for charging and discharging. Battery pack is installed;

N small-capacity USB terminals usable in _a predetermined range of voltages (V _a ) and corresponding to the USB port, and electrically connected to the small-capacity USB terminals and having a voltage range greater than V _a (V _b : V _b ≥ Charging / discharging connection device including one or n large capacity USB terminals usable in V _a ); And

And a number of USB ports corresponding to the large-capacity USB terminal, and transmits electricity supplied from an external power source to the charging / discharging connection device when the battery pack is charged, and discharges the battery pack when the external power is cut off. A device main body which receives electricity from a charging / discharging connection device;

.

Therefore, the wireless device according to the present invention, the battery pack, the battery pack equipped with a USB port for performing charging and charging only, and a small capacity USB terminal and a large capacity USB terminal for electrically connecting the battery pack and the device main body for mutual voltage conversion Since the device includes a charge / discharge connection device and a device body including a USB port, the battery pack can be electrically connected to the device body regardless of the type of the battery pack, thereby charging and discharging the battery pack as necessary.

One of the main features of the present invention is that, as mentioned above, the charging / discharging connection device is composed of a small capacity USB terminal and a large capacity USB terminal. In general, USB has a voltage capacity of 4.2 V, which is equal to the voltage capacity of one battery cell or bank, and thus N small capacity terminals are required to charge a battery pack consisting of N battery cells. Therefore, the charging / discharging connection device of the present invention includes N small-capacity USB terminals and a large-capacity USB that can be used at a voltage range larger than that of the small-capacity USB terminals. It can be achieved easily.

In addition, since the USB port is integrally mounted to the battery pack, it is possible to implement a very compact structure and to share the product.

Since the structure and the mechanism of action of the USB terminal in the present invention are known in the art, a detailed description thereof is omitted herein.

The number of small-capacity USB terminals may vary depending on the capacity of the battery pack, and may be, for example, 2 to 10. Since the number of small capacity USB terminals corresponds to the number of battery cells (or banks), when the number of small capacity USB terminals is 2 to 10, the number of battery cells or banks constituting the battery pack is also 2 to 10.

The number of large-capacity USB terminals may be, for example, one. This means that there is only one high-capacity USB terminal connected to the device body.

Meanwhile, V _a , _a range in which the small-capacity USB terminal can be used, may vary depending on the configuration of the USB terminal, for example, 3 to 4.5 V, and more preferably 4.2 V as the voltage of one lithium secondary battery cell. Can be.

The range in which the large-capacity USB terminal can be used is V _b , which may be 10 to 20 V, preferably in the case of three or four lithium secondary battery cells electrically connected in series (or a bank of two or more lithium secondary battery cells). Three or four in series) of 12.6 to 16.8 V.

In one preferred embodiment, the charge-only connection device includes a converter for changing the voltage in the electrical connection state between the large-capacity USB terminal and the small-capacity USB terminal, so that a high voltage applied to the large-capacity USB terminal is applied to the small-capacity USB terminal The low voltage may be converted into a low voltage, or the low voltage applied to the small capacity USB terminal may be converted into the high voltage applied to the large capacity USB terminal.

For example, the converter may be a voltage converter that converts a high voltage of 10 to 20 V and a low voltage of 3 to 5 V.

Specifically, during charging of the battery pack, a high voltage of 10 to 20 V is converted into a low voltage of 3 to 5 V through a converter. That is, the voltage capacity supplied from the external power supply and transmitted to the large capacity USB terminal is 10 to 20V, but the voltage capacity of one small USB terminal is 3 to 5V. Therefore, each small capacity USB terminal is converted by converting a voltage of 10 to 20V through a converter. Supplies a voltage of 3 to 5 V, which is supplied to each battery cell or bank.

On the contrary, upon discharge of the battery pack, a voltage of 3 to 5 V supplied to each of the small capacity USB terminals is converted into a voltage of 10 to 20 V through a converter, which is transmitted to the device body via the large capacity USB terminal.

The converter is not particularly limited as long as it is a structure that can easily change the voltage at the time of charging and discharging the battery pack. For example, the converter may include a mechanical conversion switch or an electrical conversion circuit unit.

For reference, a mechanical conversion switch refers to a switch for physically converting an electrical series connection of a battery cell or a bank constituting a battery pack. In addition, an electrical conversion circuit part means having comprised the conversion of a voltage into an electrical circuit, for example, the circuit board which mounts an electrical conversion circuit is mentioned.

The device body is not particularly limited as long as the device uses a battery pack as a power source, and may be, for example, a notebook computer.

On the other hand, the small-capacity USB terminal and the large-capacity USB terminal may be formed integrally or separately with the charging and discharging connection device, for example, may be a structure that is connected to each other by a wire in the case of the detachable.

Specifically, the wire may be a small-capacity USB terminal and an electrical conductor for electrically connecting the large-capacity USB terminal and the charging / discharging connection device.

The battery cells constituting the battery pack are not particularly limited in form and type as long as they are rechargeable batteries capable of charging and discharging, but may be, for example, lithium secondary batteries, and more preferably cylindrical lithium secondary batteries. have.

In some cases, the battery pack further includes an operation circuit unit configured to electrically connect one USB port in units of battery cells or banks during charging.

For example, when charging, the device body transmits electricity supplied from an external power source to the battery pack via a connection device for charging and discharging, and connects N USB ports in which the operation circuits of the battery pack are mounted on the battery pack. By electrically connecting one by one, the voltage of the device body can be easily converted to a predetermined voltage required by each of the battery cells or banks.

The USB port of the battery pack is not particularly limited as long as it is mounted in the battery pack and can be electrically connected. For example, the USB port may be located at the front end, the rear end, or the side of the pack case.

Here, the front end of the pack case refers to the position of the positive electrode terminal among the final electrode terminals of the battery cells embedded in the pack case, and the rear end refers to the position of the negative electrode terminal of the final electrode terminals. Therefore, the side part means an arbitrary position between the front end part and the rear end part.

The present invention also provides a charging and discharging connection device having a structure in which voltage can be easily converted.

Specifically, the charging / discharging connection device is a charging / discharging connection device that is electrically connected between a battery pack including N (N ≧ 2) battery cells or banks electrically connected to a main body of a wireless device. available on the voltage (V _a), and N number of low capacity USB terminal, and the small-capacity the USB terminal and electrically connected to, and the voltage of the range larger than the V _a: one available from (V _b V _b ≥V _a) or It consists of a structure including n (n≤N) high capacity USB terminals.

Therefore, the charging / discharging connection device according to the present invention, as mentioned above, includes a small capacity USB terminal and a large capacity USB that can be used in a voltage range larger than the small capacity USB terminal, so that the battery cell or the The bank and the device main body are electrically connected to each other to easily charge and discharge the battery cell or the bank.

In addition, unlike the conventional battery pack structure in which only one type of battery pack can be charged and discharged depending on the type of the device body, the structure can be used in common, so that the battery pack and the device body may be used regardless of the type of the battery pack and the device body. Can be used in common for charging and discharging.

In one preferred example, the charge-only connection device may further include a converter for changing the voltage in the electrical connection state between the large-capacity USB terminal and the small-capacity USB terminal.

Hereinafter, the content of the present invention will be described in detail with reference to the drawings, but the scope of the present invention is not limited thereto.

FIG. 1 is a schematic diagram illustrating a process of combining six cylindrical secondary batteries by an electrical connection method of 2P (Parallel)-3S (Serial).

Referring to FIG. 1, six cylindrical cells 20 and 21 are arranged in two pairs, each of which has a positive electrode facing to the left, forming a total of three battery pairs, and the nickel plate 30 is disposed between them. The electrical connection is established. That is, in the nickel plate 30, two pairs of cells located on both sides thereof are joined by spot welding, so that adjacent cells (banks) in the vertical direction make a parallel connection, and the adjacent cells in the horizontal direction make a series connection. Is achieved. Thus, a 2P-3S connection structure is made as a whole.

2 is a schematic diagram of a wireless device according to one embodiment of the present invention.

2, the wireless device 400 includes a battery pack 100 equipped with three USB ports 160, three small USB terminals 210, and one large USB terminal 220. The device main body 300 is equipped with a connection device 200 for charge and discharge and one USB port 310.

The battery pack 100 includes six cylindrical battery cells 102, 104, and 106 in a state of being electrically connected in a 3S-2P structure, a pack case 140, a protection circuit module 150, and a pack case 140. It is composed of three USB ports 160 formed on the outer surface of the protective circuit module 150 and the electrical connection state.

Connection members (not shown) for electrode terminals respectively connected to the positive and negative terminals of the battery cells 102, 104 and 106 are connected to both outer surfaces of the cylindrical battery cells 102, 104 and 106.

The protection circuit module 150 is mounted in one side of the pack case 140 in a PCB structure and is electrically connected to a connection member (not shown) of the battery cells 102, 104, and 106.

The charging / discharging connection device 200 includes three small-capacity USB terminals 210 coupled with the USB port 160 of the battery pack 100 and one large-capacity USB coupled with the USB port 310 of the device body 300. The terminal 220, the small-capacity USB terminals 210 and the large-capacity USB terminal 220 are electrically connected to a wire 230, and a converter 240 for voltage change.

The device main body 300 is provided with one USB port 310 corresponding to the large-capacity USB terminal 220 of the charging and discharging connection device 200 on one outer surface, and is supplied from an external power source when the battery pack 100 is charged. The electricity is supplied to the charging / discharging connection device 200, and the electric power is supplied from the charging / discharging connection device 200 when the battery pack 100 is discharged while the external power source is cut off.

The process of charging and discharging the battery pack 100 includes inserting small-capacity USB terminals 210 into the UBS port 160 mounted on the outer surface of the battery pack 100, and connecting the small-capacity USB terminals by the wire 530. The high-capacity USB terminal 220 electrically connected to the 210 is coupled to the device body 300 to electrically connect the battery pack 100 and the device body 300 to achieve charge and discharge of the battery pack 100. Done. For example, when the battery pack 100 is charged, the device body 300 is connected to an external power source (not shown), and the battery pack (for example, the battery pack 100) is connected to the charging and discharging device 200 via the electricity supplied from the external power source. 100). On the contrary, when the battery pack 100 is discharged, the device main body 300 is supplied with electricity from the battery pack 100 via the connection device 200 for charging and discharging without being connected to an external power source.

Therefore, the wireless device 400 may achieve charge / discharge of the battery pack 100 regardless of the type of the battery pack 100 through the charging and discharging connection device 200.

3 is a schematic diagram of a battery pack according to another embodiment of the present invention.

Referring to FIG. 3, the battery pack 500 includes three pack cases 510 formed in a cylindrical battery cell (not shown) in an electrically connected state, and three outer surfaces of one side of the pack case 510. It is composed of USB ports 521.

The pack case 510 includes an upper case 512 and a lower case 514, and a pair of fastening through holes 536 are formed at both lower ends of the cover 530.

The USB port 521 has a structure in which an inlet 531 of the USB port 521 is mounted to the outside of one side of the pack case 510.

As described above, the wireless device according to the present invention has a structure that forms a charge and discharge of the battery pack by using a universal serial bus (USB), it is possible to improve the ease of use and to achieve common use of the battery pack.

In addition, since the connection device for charging and discharging includes a small capacity USB terminal and a large capacity USB terminal, the voltage can be easily changed, and the charge and discharge of the battery pack can be easily achieved regardless of the type of the battery pack.

Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

FIG. 1 is a schematic diagram of a process of combining six cylindrical secondary batteries by an electrical connection method of 2P (Parallel)-3S (Serial);

2 is a schematic diagram of a wireless device according to one embodiment of the invention;

3 is a schematic view of a battery pack according to another embodiment of the present invention.

Claims (14)

N (N2) electrically connected battery cells or banks are built into the pack case, and the outer surface of the pack case is equipped with N universal serial bus (USB) ports for input and output for charging and discharging. A battery pack; N small-capacity USB terminals usable in _a predetermined range of voltages (V _a ) and corresponding to the USB ports, and electrically connected to the small-capacity USB terminals, and have a voltage in a range greater than V _a (V _b : V _b V _{a charge /} discharge connection device including one or n (nN) large-capacity USB terminals usable in _a ); And And a number of USB ports corresponding to the large-capacity USB terminal, and transmits electricity supplied from an external power source to the charging / discharging connection device when the battery pack is charged, and discharges the battery pack when the external power is cut off. A device main body which receives electricity from a charging / discharging connection device; It consists of The number of the small capacity USB terminal is 2 to 10 and the number of the large capacity USB terminal is one, V _a is 3 to 4.5 V and V _b is 10 to 20 V, The charging / discharging connection device includes a converter for changing a voltage in an electrical connection state between a large capacity USB terminal and a small capacity USB terminal. The battery pack includes an operation circuit unit configured to electrically connect one USB port in unit of a battery cell or bank during charging. delete delete delete delete delete 2. The wireless device of claim 1 wherein the converter is comprised of a mechanical conversion switch or electrical conversion circuitry. The wireless device of claim 1, wherein the device body is a notebook computer. The wireless device of claim 1, wherein the small capacity USB terminal or the large capacity USB terminal is interconnected by a wire. The wireless device of claim 1, wherein the battery cell is a lithium secondary battery. delete The wireless device of claim 1, wherein the USB port of the battery pack is located at a front end, a rear end, or a side of the pack case. delete delete

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