JPH118942A - Dc power source recognizer, and power switch of battery pack, and electronic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the most of the capacity that a battery originally has by providing a battery device body with a lead switch and a DC power source which has a magnetism giving means, and recognizing the DC power source by the opening and closing of the lead switch by the magnetism giving means. SOLUTION: Two lead switches are installed, with its installation places changed, on the portable telephone body side. For example, two lead switches are installed at right angles, and in a battery pack 18, they are installed with the mounting place/direction of a magnet 19 being changed, according to the kind of the pack. Thereupon, when the battery pack 18 is mounted on the body of a portable telephone, it becomes possible for a lead switch to operate, being affected by the magnetic force of the permanent magnet 19, and send a control signal to the CPU inside the body of the portable telephone, and to judge which battery pack from among battery packs A, B, C, and D without built-in permanent magnets matches with a battery pack 18 with a built-in permanent magnet 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DC power source identification device for a portable telephone and a power supply switching device for a battery pack.
In particular, it relates to the structure of a battery pack in a mobile phone.

[0002]

2. Description of the Related Art Conventionally, techniques in such a field include:
For example, there were the following. (1) Usually, a mobile phone is prepared with a plurality of battery packs, and has a shape for each purpose such as emphasis on portability and long-time use, and a battery capacity. At the time of charging, it is necessary to perform charging control according to the capacity or type (nickel, nickel metal hydride, lithium ion) of the battery pack. In order to distinguish the charging of these various battery packs, the structure of the battery pack is provided with an identification function. Common identification methods include:
There are a method of identifying a battery pack having a plurality of terminals by changing the internal circuit of the battery pack, and a method of detecting and identifying a change in voltage or current by inserting a resistance element into the circuit of the battery pack.

(2) When using a mobile phone, a user usually attaches and uses one type of battery. If you make a long call or wait for a long time,
The voltage of the battery is detected, the remaining capacity of the battery pack is predicted from general discharge characteristic data of each battery, and a display such as "Charging required" or an alarm is sounded. The alarm is activated when the voltage reaches a voltage value programmed in advance in the mobile phone main body, and the user can talk for about 5 minutes thereafter. Thereafter, the user takes out the charged battery pack, replaces it, and makes the mobile phone usable. Alternatively, a battery pack (or a battery pack attached to the main body of the mobile phone) is inserted into the charger, and the mobile phone is used after charging.

(3) A portable telephone has been developed by using low-voltage driving parts or adopting and using expensive low-voltage parts to reduce the number of battery packs in a battery pack, thereby promoting lightness and thinness. Was. Usually 7.2V, 6V (5V),
It is realized in a 4.8 V, 3.6 V (3 V) system, and is basically designed using a voltage corresponding to a combination of the number of batteries as a basic voltage. A nickel-cadmium or nickel-metal hydride battery pack is designed so that the basic voltage is a voltage that is an integral multiple of 1.2 V, which is the voltage of a single battery. Recently, the number of mobile phones adopting lithium ion has been increasing, and 3.6V or 7.2V is designed as a basic voltage.

The internal circuit of the portable telephone does not operate at the voltage (basic voltage) of the selected battery pack, but drives the power amplifier of the radio system using the basic voltage itself (highest voltage). The control system circuit generates and drives a 3V system voltage using a power supply circuit or the like. However,
When the driving of a component such as a power amplifier is higher than the basic voltage, the voltage is boosted and driven by an up converter (DC-DC converter).

Further, an LCD display used for a display section is boosted twice (or three times) by a drive IC (driver IC) to generate a voltage for producing a contrast.

[0007]

However, the above-described conventional battery pack identification structure has the following problems. FIG. 16 is a diagram showing a circuit of a conventional battery pack. (1) As shown in the circuit of FIG.
, At least three terminals of the minus terminal 101, the identification terminal 102, and the plus terminal 103 are required. A battery pack using nickel-hydrogen requires a measuring terminal for a thermistor element in order to monitor the temperature of the battery alone.

Further, even if an identification circuit as shown in FIG. 16B is used, the identification terminal 102 is required. Thus, the number of terminals that must be provided is three or more, and it has been difficult to reduce the size of the device. (2) The "Charging required" indication on the battery pack of the mobile phone is
As described above, it is programmed after grasping the general discharge characteristics of the used battery, and the discharge characteristics of each battery pack vary depending on the number of times of charge / discharge of the battery pack, the operating temperature environment, and the amount of current used. . Therefore, the "Charging required" display is only a guide for the user, and the display is made, and it is difficult for the user to judge how much the battery can be used. For example, there is a case where the power is suddenly turned off after the display or the display can be used for a long time even after the display.

Also, very few users have another charged battery pack as a spare, and in reality, when a "Charge required" message is displayed, the user must take it home and recharge it again. In general, the mobile phone cannot be used, and the user feels inconvenience. (3) Low-voltage driving of components used in mobile phones has been progressing. However, what is actually reduced in voltage is an IC or the like in a control circuit system. A power amplifier or the like that outputs radio waves has a power conversion efficiency, that is, an efficiency in converting electric power into an output radio wave, in which the operating voltage is low. The more they become, the more they tend to get worse. In particular, a dual mode device having analog and digital communication means (for example, TD for North America)
The power amplifier of MA / CDMA type mobile phone)
Generally, the power conversion efficiency of the power amplifier is significantly reduced, and the power conversion efficiency of the power amplifier is reduced to 30% or less at present.

In the actual situation, about 80% of the current consumed by a mobile phone during a call is consumed by the power amplifier, and about half of the substantial current consumed is wasted as heat. When the basic voltage is increased, the efficiency of the power amplifier and the like is improved, but the power supplied to the control circuit and the like needs to be reduced by a down converter or the like. Typically,
The conversion efficiency of the down converter is poor, and the standby time and the like may be significantly reduced.

Conversely, when the basic voltage is kept low and the drive voltage of the power amplifier is raised, an up-converter (DC-DC converter) circuit is required, and the efficiency at the time of voltage conversion is about 80%. However, power consumption is increased. As described above, in any case, it is difficult to configure a mobile phone that makes full use of the inherent capacity of the battery.

An object of the present invention is to provide a DC power source identification device, a battery pack power supply switching device, and an electronic device, which eliminate the above problems and make full use of the inherent capacity of a battery.

[0013]

According to the present invention, there is provided a DC power supply identification device, comprising: at least one reed switch provided on an electronic device main body; And a DC power supply having at least one magnetic applying means, wherein the DC power supply is identified by opening and closing the reed switch by the magnetic applying means.

[2] In the DC power supply identification device, one or more magnetoresistive elements provided in the electronic device main body, and a DC power supply mounted on the electronic device main body and having one or more magnetizing means. Wherein the DC power supply is identified by a change in the resistance of the magnetoresistive element by the magnetism applying means. [3] In the DC power supply identification device according to the above [1] or [2], the magnetizing means is a permanent magnet.

[4] In the apparatus for identifying a DC power supply according to the above [2], the magnetizing means is a printed magnetic material. [5] In the identification device for a DC power supply according to the above [4],
The printed magnetic material is a magnetic material printed on the product label itself of the DC power supply, and is arranged at a position where the top and bottom of the DC power supply can be identified.

[6] In the DC power supply identification device according to [1], the DC power supply is a battery pack. [7] In the DC power supply identification device according to the above [1],
The DC power supply is a single secondary battery. [8] In the identification device for a DC power supply according to the above [7],
The magnetism applying means is a magnetic material printed at a position deviated from the center of the single secondary battery and on the outer peripheral portion.

[0017]

[9] In the power supply switching device for a battery pack, a battery pack having two systems of secondary batteries, a switch for switching between the two systems of secondary batteries, and any one of the secondary batteries is connected by the switch. A charging terminal and a discharging terminal to which any of the secondary batteries is connected by the changeover switch are provided. [10] The above

[9] The power supply switching device for a battery pack according to [9], wherein the two-system changeover switch is integrated with a slide knob of a molded product provided on a main body of a mobile phone that operates a reed switch provided on the battery pack. It is operated by a permanent magnet.

[11] The above

[9] The power supply switching device for a battery pack according to [9], wherein the series connection of secondary batteries of the same type is changed by a power supply control device to obtain two power supply voltages. [12] In the electronic device, a dry battery having a magnetic material formed on the outer peripheral portion, and a magnetic sensitive element that operates by the action of the magnetic material of the dry battery, and a means for determining the type of the dry battery may be provided. It was done.

[13] The electronic device according to the above [12], wherein the magnetic material of the battery is printed at a position deviated from the center and on the outer peripheral portion. [14] The electronic device includes a secondary battery having a magnetic body formed on an outer peripheral portion, and a magnetic element which operates by the action of the magnetic body of the secondary battery, and determines the type of the secondary battery. Means and a charging means for charging the rechargeable battery if the battery is suitable as a result of the determination.

[0020]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the present invention, description will be made mainly on charging of a battery pack via a mobile phone. However, a similar configuration can be adopted when the battery pack is charged by a charger on a desk or the like.

FIG. 1 is a diagram showing a basic configuration of the first embodiment of the present invention. As shown in this figure, a reed switch 12 is provided inside a mobile phone main body 11, and a permanent magnet 14 is provided inside a battery pack 13. In addition,
A central processing unit (CPU) 15 is connected to the reed switch 12. FIG. 2 is a diagram showing an application example of the first embodiment of the present invention.

In the first embodiment, the portable telephone body 16
On the side, two reed switches 17 are installed at different installation locations. Here, two reed switches 17 are installed in a right angle direction, and the battery pack 18 is installed with the permanent magnet 19 mounted in a different location / direction in accordance with the type of the pack. Therefore, when the battery pack 18 is mounted on the mobile phone main body 16, the reed switch 17 operates under the influence of the magnetic force of the permanent magnet 19, and operates.
6. It becomes possible to send a control signal to a CPU (not shown) inside 6, and which battery pack among the battery packs 18 with built-in permanent magnets 19 and the battery packs A, B, C and D without built-in matches. Can be determined.

When a plurality of reed switches 17 shown in FIG. 2 (in this application example, two switches) are used, a battery pack A without magnets, a battery pack B with magnets mounted vertically, a horizontal battery pack B, Four types of battery pack C, in which magnets are attached in the directions, and battery pack D, in which two magnets are mounted in the perpendicular direction, are identified. Here, when the two reed switches 17 of the mobile phone main body 16 correspond to the pack D provided with the two magnets 19, the two reed switches 17 are turned on, so that the pack D is legal. And can be charged.

With such a configuration, according to the first embodiment, the following effects can be obtained. (1) The terminal for identification can be omitted. (2) Since the internal wiring structure of the battery pack can be simplified, the cost of the battery pack can be reduced.

(3) Since the battery pack itself does not have a contact type identification terminal, the probability of malfunction due to a contact failure can be reduced, and a charging failure can be suppressed. (4) More discrimination is possible by combining with the conventional method. For example, a battery pack that can be used by inserting batteries in an emergency is sold as an option.A circuit is opened mechanically by inserting a magnet into this pack and directly connecting a relay inside the main unit to the charging circuit. Can be prevented from being charged by mistake.

Next, a second embodiment of the present invention will be described. FIG. 3 is a view showing the structure of a battery pack according to a second embodiment of the present invention. FIG. 3 (a) is a top view of the battery pack, FIG. 3 (b) is a side view of the battery pack, and FIG. (c) is a front view of the battery pack. FIG. 4 is a diagram showing a state where the battery pack is mounted on a charger, and FIG. 5 is a block diagram of the charging circuit.

As shown in these figures, the battery pack 21
, The assembled battery of the secondary battery 23 and the permanent magnet 22 are mounted. The battery pack 21 has two charging terminals, a plus terminal and a minus terminal. However, depending on the charging method specific to the battery, a terminal for temperature detection is also required. The permanent magnet 22 can be mounted inside the battery pack 21 (inside the case) or can be insert-molded in the case in advance. It is also possible to form a concave shape in the case in advance and fix the permanent magnet 22 with an adhesive. It is possible to cover and hide it with the pack label.

The charger has a structure as shown in FIG. 4, and the charger 25 has a magnetoresistive element 24 inside. 23A is a battery pack housing, and 26 is a central processing unit (CPU). Then, when the battery pack 21 having the secondary battery 23 is inserted into the charger 25, the magnetoresistive element 24 on the opposite side of the permanent magnet 22 detects the magnetism and sends a signal to the CPU 26 of the charger 25. CPU26
Operates the charging circuit according to the signal. Charging conditions are set in advance, and charging is started according to the battery pack.

It should be noted that the above-described configuration can also be applied to a case where the main unit has a charger. With such a configuration, according to the second embodiment, the following effects can be obtained. (1) When multiple permanent magnets are installed in the battery pack, the charger can also be equipped with a corresponding magnetoresistive element to increase the battery pack type by the combination of the presence or absence of the magnet. become.

(2) Since there is no identification terminal of the battery pack,
It is possible to reduce the risk of erroneous setting charging due to a contact failure. (3) Since the number of terminals for charging can be reduced, the size of the device can be reduced and the configuration can be simplified. (4) Since the charger circuit starts charging after confirming the magnetism, even if a battery other than the specified battery is inserted, it is safe from erroneous charging.

(5) The magnet can be accurately fixed at the time of the case alone, and can be realized without complicating the manufacturing process of the battery pack. Next, a third embodiment of the present invention will be described. FIG. 6 is a perspective view of a battery pack showing a third embodiment of the present invention. In this example,
The magnetic material 33 is printed on the product label 32 of the battery pack 31 in advance, and is attached to a predetermined position of the battery pack 31.

FIG. 7 is a perspective view of a secondary battery showing a third embodiment of the present invention. In this embodiment, the magnetic material 36 is printed on the outer peripheral portion 35 of the secondary battery unit 34. Here, the secondary battery unit 34 is a cylindrical type, but may be a square type. The magnetic body thus configured is, for example, shown in FIGS.
As shown in the above, acting on the magnetoresistive element on the charger side,
Charger can be controlled.

With such a configuration, according to the third embodiment, the following effects can be obtained. (1) Since the printing position can be freely set by printing a magnetic material on the product label, it is possible to match the position of the magnetic resistance element on the charger side regardless of the internal structure of the battery pack. Also, because of printing, there is no restriction in the thickness direction.

(2) By printing on a rechargeable secondary battery alone, it is possible to prevent an unrechargeable primary battery of the same size from being accidentally inserted into a secondary battery charger and starting charging. . Further, even if the positive and negative poles are inserted in the charger in reverse, since the difference between the upper and lower sides of the secondary battery can be confirmed, there is no danger of being charged by mistake.

Next, a fourth embodiment of the present invention will be described. This fourth embodiment provides a circuit and a structure of a battery pack that can use a spare battery when the user runs out of the battery pack while using the mobile phone, and a structure of the main body side. Is what you do. FIG. 8 is a configuration diagram of a battery pack showing a fourth embodiment of the present invention, and FIG. 9 is a circuit diagram of the battery pack.

As shown in FIG. 8, the battery pack 41 incorporates a secondary battery 42, a spare secondary battery 43, and a relay (two-contact type) 44 which are normally used. These are connected as shown in the circuit diagram of FIG. 9, and two positive terminals 45A and 46B are provided as the discharging terminal 45, and two positive terminals 46A and 46 are used as the charging terminal 46.
B and one minus terminal 46C.

FIG. 10 shows an example of a structure when a battery pack according to a fourth embodiment of the present invention is mounted on a portable telephone body. FIG. 10A is a schematic configuration diagram, and FIG. 10B is a partial cross-sectional view of a slide knob for switching a power supply. As shown in these figures, a slide knob 48 for switching the power supply is provided on a side surface of the mobile phone main body 47, and a permanent magnet 49 is attached to the slide knob 48.

As the relay 44, a switch for switching two contacts is used. However, a switch having the same function as the relay 44 may be used. The function of operating this switch may be provided on the battery pack 41 side or may be linked with the mobile phone main body 47 side. Therefore, when the battery pack 41 is attached to the mobile phone main body 47 and the user uses up to the usable capacity of the secondary battery 42 which is a power source normally used, the mobile phone main body 47 has a low remaining battery. Alerts the user with a sound or display.

Thus, the user can use the portable telephone main body 47.
Is moved to the ON side to use the spare secondary battery 43. At that time, the permanent magnet 49 also operates together with the slide knob 48 to switch the relay 44 built in the battery pack 41. As a result, the power supply circuit switches from the main secondary battery 42 to the spare secondary battery 43.

Further, when charging the battery of the present invention, since the terminal for the main secondary battery 42 and the plus terminal of the spare secondary battery 43 are provided independently, the charging characteristics of each battery are It can be charged in a combined charging environment. With such a configuration, according to the fourth embodiment,
The following effects can be obtained.

(1) The user can use a spare power supply after confirming that there is no remaining battery pack by an alarm or the like, so that the cell phone cannot be used due to unexpected battery depletion. Things are less. (2) There is no need to carry a spare battery pack. (3) It is possible to switch to a spare battery side without taking out the battery.

(4) Since the charger side can individually provide an optimum charging environment, for example, when a battery capable of ultra-rapid charging is arranged in the spare battery, the user charges only the spare side in a short time, It can be used in an emergency. Next, a fifth embodiment of the present invention will be described. This fifth
The embodiment provides a battery pack having two systems of power supplies so that a mobile phone can operate efficiently.

FIG. 11 is a view showing an example of the structure of a battery pack according to a fifth embodiment of the present invention using a lithium ion battery. As shown in this figure, in a battery pack 51, a lithium ion battery 52 wired in series and a lithium ion battery 53 as a single battery are connected to plus terminals 54 and 55 and minus terminals 56 and 57 for power supply, respectively. It is connected.

FIG. 12 is a circuit diagram showing a fifth embodiment of the present invention. Here, a 7.2 V power supply can be output from the lithium ion battery 52 connected in series, and a 3.6 V voltage can be output from the lithium ion battery 53 as a single battery. FIG. 13 is a block diagram when a battery pack according to a fifth embodiment of the present invention is connected to a mobile phone main body.

In this figure, reference numeral 61 denotes a portable telephone body,
62 is a power supply control IC (or circuit), 63 is a 3.6 V circuit, 64 is a 7.2 V circuit, and 65 is another XV circuit. Power supply control IC (or circuit) 62 in FIG.
Has a function of efficiently providing two systems of power as a required voltage to a circuit inside the device. Battery pack 51
The two power supplies supplied to the internal circuit as the stabilized power supply from the regulator circuit respectively, that is, the 7.2 V system of the stabilized power supply is supplied as the power supply of the power amplifier, and the other power supply of the 3.6 V system is A power supply for driving a control circuit of the mobile phone.

The power supply control IC (or circuit) 6
It is easy to provide the circuit 2 with a capacity detection function (voltage detection value) for each battery, and to provide a circuit capable of boosting or reducing the pressure and supplying the internal circuit when one of the batteries has run out of capacity. With this configuration, according to the fifth embodiment, the following effects can be obtained.

(1) Since a voltage (for example, 7.2 V) for efficiently operating the power amplifier can be easily obtained, the conversion efficiency is improved, and the talk time can be extended. (2) Since an optimum power supply (for example, 3.6 V or the like) can be supplied to the operation circuit in the standby state, it is not necessary to consider the voltage conversion efficiency of the up converter or the down converter, and the standby time can be extended. Become.

(3) Cost /
Since various components can be adopted with emphasis on performance, not only can the cost of the device be reduced, but also commercially available components can be adopted without developing new components. This eliminates the need to develop a new component driven by low voltage, which has been a bottleneck in the conventional development, and can shorten the development period.

(4) Since the system has two power supplies, it is easy to select whether the capacity of the battery to be used is important for continuous communication or for continuous standby time, and it is possible to provide a product with features. . For example, a user who is mostly in a standby state and has a small number of talking states can increase the capacity of the single battery side and employ a battery with a small capacity of the directly connected battery side. In addition, a user who attaches importance to talk time can purchase a battery pack having the above-described reverse configuration.

(5) The type of battery can be easily changed, and the charging method can be easily set. For example, a combination of a lithium ion and a nickel hydride battery is possible. (6) A circuit configuration in which a DC-DC converter or the like conventionally used is eliminated can be easily configured, and the device configuration cost can be reduced.

Next, a sixth embodiment of the present invention will be described. In this embodiment, as shown in FIG.
At the position deviated from the center of 0, a type in which the type of battery voltage, current, rated output and the like are encoded by the magnetic material 201 is provided. On the other hand, an electronic device (not shown) to which the dry battery 200 is attached is provided with a magnetic sensitive element of a coded magnetic body 201 indicating the type of the dry battery 200, and the operation of the magnetic sensitive element causes the dry battery to operate. It can be configured so that the type can be determined.

Next, a seventh embodiment of the present invention will be described. FIG. 15 is a schematic configuration diagram of an electronic device according to a seventh embodiment of the present invention. In this figure, 300 is a secondary battery, 3
01 is a magnetic material formed on the outer peripheral portion of the secondary battery 300;
Reference numeral 00 denotes an electronic device (for example, a mobile phone or a portable charging device), reference numeral 401 denotes a magnetic resistance element provided in the electronic device, reference numeral 402 denotes a CPU, reference numeral 403 denotes a current control circuit, and reference numeral 404 denotes a charging DC power supply circuit.

Therefore, the secondary battery 300 is connected to the electronic device 400.
, The resistance value of the magnetoresistive element 401 fluctuates,
The information is transmitted to the CPU 402. The CPU 402 determines whether or not a regular battery is mounted. If the regular battery is used, the CPU 402 drives the current control circuit 403 to charge the battery with predetermined contents. It should be noted that the present invention is not limited to the above embodiment, and various modifications can be made based on the gist of the present invention, and these are not excluded from the scope of the present invention.

[0054]

As described above, according to the present invention, the following effects can be obtained. (A) It is possible to provide a DC power source identification device and a battery pack power supply switching device that make full use of the inherent capacity of a battery of a mobile phone.

(B) It is possible to provide a DC power supply identification device that can reliably prevent erroneous charging with a simple configuration when charging the DC power supply. (C) By printing the magnetic material on the label, the printing position can be freely set, so that it can be adjusted to the location of the magnetoresistive element on the charger side regardless of the internal structure of the battery pack. Also, because of printing, there is no restriction in the thickness direction.

(D) By printing on a rechargeable secondary battery alone, it is possible to prevent an unrechargeable primary battery of the same size from being erroneously inserted into a secondary battery charger and starting charging. it can. Further, even if the positive and negative poles are inserted in the charger in reverse, since the difference between the upper and lower sides of the secondary battery can be confirmed, there is no danger of being charged by mistake.

(E) The user can use a spare power source after confirming that there is no remaining battery in the battery pack by using an alarm or the like. Decrease. (F) Since a voltage (for example, 7.2 V) for operating the power amplifier efficiently can be easily obtained, the conversion efficiency is improved, and the talk time can be extended.

Further, since it is possible to supply an optimum power supply (for example, 3.6 V) to the operation circuit in the standby state, it is not necessary to consider the voltage conversion efficiency of the up converter or the down converter, and the standby time can be extended. Will be possible.

[Brief description of the drawings]

FIG. 1 is a diagram showing a basic configuration of a first embodiment of the present invention.

FIG. 2 is a diagram showing an application example of the first embodiment of the present invention.

FIG. 3 is a view showing a structure of a battery pack according to a second embodiment of the present invention.

FIG. 4 is a view showing a state where a battery pack according to a second embodiment of the present invention is mounted on a charger.

FIG. 5 is a block diagram of a battery pack charging circuit according to a second embodiment of the present invention.

FIG. 6 is a perspective view of a battery pack showing a third embodiment of the present invention.

FIG. 7 is a perspective view of a secondary battery according to a third embodiment of the present invention.

FIG. 8 is a configuration diagram of a battery pack according to a fourth embodiment of the present invention.

FIG. 9 is a circuit diagram of a battery pack showing a fourth embodiment of the present invention.

FIG. 10 is a diagram illustrating an example of a configuration when a battery pack according to a fourth embodiment of the present invention is mounted on a mobile phone main body.

FIG. 11 is a view showing an example of a structure of a battery pack according to a fifth embodiment of the present invention.

FIG. 12 is a circuit diagram showing a fifth embodiment of the present invention.

FIG. 13 is a block diagram when a battery pack according to a fifth embodiment of the present invention is connected to a mobile phone main body.

FIG. 14 is a view showing a dry battery according to a sixth embodiment of the present invention.

FIG. 15 is a schematic configuration diagram of an electronic device according to a seventh embodiment of the present invention.

FIG. 16 is a diagram showing a circuit of a conventional battery pack.

[Explanation of symbols]

 11, 16, 47, 61 Cellular phone body 12, 17 Reed switch 13, 18, 21, 31, 41, 51 Battery pack 14, 19, 22, 49 Permanent magnet 15, 26, 402 Central processing unit (CPU) 23, 42 Secondary Battery 23A Battery Pack Case 24 Magnetoresistive Element 25 Charger 32 Product Label 33,36 Magnetic Material 34 Secondary Battery Single Unit 35 Outer Part 43 Spare Secondary Battery 44 Relay (2 Contact Type) 45 Discharge Terminal 46 Charge Terminal 48 Slide knob 52 Lithium ion battery 53 Lithium ion battery 54, 55 Positive terminal for power supply 56, 57 Negative terminal for power supply 62 Power supply control IC (or circuit) 63 3.6 V circuit 64 7.2 V System circuit 65 Other XV system circuit 200 Dry cell 201 Encoded magnetic material 300 Next battery 301 secondary battery formed in the outer peripheral portion a magnetic material 400 electronic device 401 magnetoresistive element 403 a current control circuit 404 charging the DC power supply circuit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI H01M 10/46 H01M 10/46

Claims (14)

[Claims] 1. An electronic device comprising: (a) one or more reed switches provided on a main body of an electronic device; and (b) a DC power supply mounted on the main body of the electronic device and having one or more magnetizing means. (C) The DC power supply identification device, wherein the DC power supply is identified by opening and closing the reed switch by the magnetizing means. 2. An electronic device comprising: (a) one or more magnetoresistive elements provided in an electronic device main body; and (b) a DC power supply mounted on the electronic device main body and having one or more magnetism applying means. (C) The DC power supply identification device, wherein the DC power supply is identified based on a change in the resistance value of the magnetoresistive element by the magnetizing means. 3. The DC power supply identification device according to claim 1, wherein said magnetizing means is a permanent magnet. 4. The DC power supply identification device according to claim 2, wherein said magnetizing means is a printed magnetic material. 5. The DC power supply identification device according to claim 4, wherein the printed magnetic material is a magnetic material printed on a product label of the DC power supply, and is located at a position where the upper and lower sides of the DC power supply can be identified. An identification device for a DC power supply, wherein the identification device is arranged. 6. The apparatus for identifying a DC power supply according to claim 1, wherein said DC power supply is a battery pack. 7. The DC power supply identification device according to claim 1, wherein the DC power supply is a single secondary battery. 8. The identification device for a DC power supply according to claim 7, wherein the magnetism applying means is a magnetic material printed on a position deviated from a center of the single secondary battery and on an outer peripheral portion. Characteristic identification device for DC power supply. 9. A battery pack having two types of secondary batteries, (b) a changeover switch for the two types of secondary batteries,
(C) a charging terminal to which one of the secondary batteries is connected by the changeover switch; and (d) a charge terminal by the changeover switch.
A power supply switching device for a battery pack, comprising: a discharge terminal to which any one of the secondary batteries is connected. 10. A power supply switching device for a battery pack according to claim 9, wherein said two-system changeover switch slides a molded product provided on a main body of a portable telephone which operates a reed switch provided on said battery pack. A power supply switching device for a battery pack, which is operated by a permanent magnet integrated with a knob. 11. The battery pack power supply switching device according to claim 9, wherein two series power supply voltages are obtained by changing the series connection of secondary batteries of the same type by a power supply control device. Power switching device. 12. A battery having a magnetic material formed on an outer peripheral portion thereof, and (b) means for discriminating a type of the dry battery, comprising: a magnetic sensitive element operated by the action of the magnetic material of the battery. An electronic device, comprising: 13. The electronic device according to claim 12, wherein
An electronic device, wherein the magnetic material of the battery is printed at a position deviated from the center and on an outer peripheral portion. 14. A secondary battery comprising: (a) a secondary battery having a magnetic material formed on an outer peripheral portion; and (b) a magnetic-sensitive element which operates by the action of the magnetic material of the secondary battery. An electronic device comprising: means for determining the type; and (c) charging means for charging when the determined secondary battery is a suitable secondary battery as a result of the determination.