JPH10209979A - Method and device for detecting abnormality for protable telephone equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device for detecting abnormality for portable telephone equipment with which the main body of portable telephone equipment can detect the contact defect of power source connector or the deterioration of battery and report it to a user. SOLUTION: The voltages of a power source connector 11-1 and a connector 12 for voltage detection are detected, their voltage difference is compared with a preset value, the contact defect of power source connectors 11-1 and 21-1 is detected from the compared result, the difference in the voltages of connectors for voltage detection in different power states is compared with a preset value, and the deterioration of battery is detected from the compared result and reported to the user.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for detecting an abnormality in a portable telephone device, and more particularly to a method for detecting a contact failure of a power supply connector for electrically connecting a battery pack and a portable telephone device main body and a deterioration due to a life of the battery. The present invention relates to a method and apparatus for detecting an abnormality of a mobile phone device that can be detected.

[0002]

2. Description of the Related Art A portable telephone device is composed of a portable telephone device main body and a detachable battery pack, and a user charges the battery pack beforehand with the battery pack alone or attached to the portable telephone device main body before use.

In a conventional portable telephone device, the remaining capacity of a battery is calculated and displayed by measuring a potential difference between a positive terminal and a negative terminal of a power connector for electrically connecting the portable telephone device body and a battery pack. . The user determines whether or not charging is necessary by looking at the remaining capacity display.

However, when there is a contact failure in the power supply connector, the voltage drop due to the contact resistance increases,
The remaining capacity display has a problem that a value smaller than the actual remaining battery capacity is displayed.

[0005] Most of the contact failures of the power supply connector are poor fitting, dirt of the connector, adhesion of foreign matter, and the like, which can be avoided by daily care and attention of the user. However, the user did not realize that the trouble could be avoided by himself, and judged that the battery had reached the end of its life, and had to replace the battery or request a maintenance shop for repair.

Although there are methods for determining the life of a battery such as measuring the impedance of the battery, it is difficult for ordinary users to measure the impedance. For this reason, the life of the battery is often determined by the user's subjective opinion, and the battery before the life is replaced or the battery that has deteriorated due to the life is sometimes used.

[0007]

As described above, in the portable telephone device, it is easy to avoid poor contact of the power supply connector for electrically connecting the portable telephone device body and the battery pack and use of the deteriorated battery. In practice, however, it is difficult for the user to determine that the power supply connector is in poor contact or that a deteriorated battery is being used, and that the deterioration of the battery is often promoted.

Accordingly, an object of the present invention is to provide a method and an apparatus for detecting an abnormality of a portable telephone device in which a portable telephone device main body can detect a contact failure of a power connector or a deterioration of a battery and notify a user. And

[0009]

In order to achieve the above-mentioned object, the present invention relates to a portable telephone device for electrically connecting a detachable battery pack to a portable telephone device body via a power connector. And a voltage detection connector for electrically connecting the mobile phone device main body to the power supply connector voltage, the voltage detection connector voltage and the power supply connector voltage are detected, and the voltage detection connector voltage and the power supply connector voltage are detected. If the difference is larger than a preset value, it is determined that the power connector is in poor contact.

Further, according to the present invention, in a portable telephone device for electrically connecting a detachable battery pack to a portable telephone device main body via a power connector, the portable telephone device has a first state in which power consumption is different. In the second state,
Detecting a voltage between terminals of the battery pack, and when a difference between the terminal voltage in the first state and the terminal voltage in the second state is larger than a preset value, the battery pack It is characterized in that it is determined that the battery has deteriorated.

Here, the inter-terminal voltage can be detected from the power connector voltage.

The terminal voltage may be detected from a voltage detection connector voltage of a voltage detection connector for electrically connecting the battery pack and the portable telephone device body.

Here, the first state may be a standby state of the portable telephone device, and the second state may be a transmission state of the portable telephone device during a call.

The first state may be a standby state of the portable telephone device, and the second state may be a receiving state of the portable telephone device during a call.

Here, the first state is a receiving state of the portable telephone device during a call, and the second state is a transmitting state of the portable telephone device during a call. Can be.

Further, according to the present invention, in a portable telephone device for electrically connecting a detachable battery pack to a portable telephone device body via a power connector, the battery pack and the portable telephone device body are electrically connected. A voltage detecting connector, a voltage detecting means for detecting the voltage detecting connector voltage and the power connector voltage, and a difference between the voltage detecting connector voltage and the power connector voltage detected by the voltage detecting means is preset. Comparing means for comparing with a value obtained by the comparing means, and when the difference between the connector voltage for voltage detection and the power supply connector voltage is larger than the preset value by the comparison of the comparing means, it is determined that the power supply connector is determined to be defective contact. Means.

Further, according to the present invention, in a portable telephone device in which a detachable battery pack is electrically connected to a portable telephone device main body via a power connector, the first state in which the portable telephone device main unit has different power consumptions is provided. Voltage detecting means for detecting a voltage between terminals of the battery pack in a second state; and a difference between the terminal voltage in the first state and the terminal voltage between the second state detected by the voltage detecting means. Calculating means, a comparing means for comparing the difference between the terminal voltages calculated by the calculating means and a preset value, and a difference between the terminal voltages obtained by comparing the comparing means is the predetermined value. And determining means for determining that the battery of the battery pack is deteriorated when the battery pack is larger than the battery pack.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method and apparatus for detecting an abnormality in a portable telephone device according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing one embodiment of a method and apparatus for detecting an abnormality in a portable telephone device according to the present invention.

In FIG. 1, the main body 1 of the portable telephone device includes power connectors 11-1 and 11-2, a voltage detection connector 12,
Power supply circuit section 13, wireless circuit section 14, antenna 15, A /
It comprises a D conversion section 16, a control circuit section 17, a communication circuit section 18, and a display section 19.

The battery pack 2 is connected to a power connector 21-.
1, 21-2, a voltage detection connector 22, and a lithium ion battery cell 23.

When using the portable telephone device, the battery pack 2 is attached to the portable telephone device main body 1 and the power supply connector 11-1 is connected.
And 21-1, 11-2 and 21-2, voltage detection connector 1
2 and 22 are electrically connected.

The electric power for driving each part of the portable telephone device main body 1 is supplied from the lithium ion battery cell 23, and is supplied to the portable telephone device main body 1 through power connectors 21-1 and 11-1, and 21-2 and 11-2. Transmitted. The lithium ion battery cell 23 has a positive electrode on the power connector 21-1 side, and a positive
It is arranged so that the 1-2 side becomes a negative electrode.

When power is supplied to the portable telephone device body 1, the power supply circuit unit 13, the radio circuit unit 14, the antenna 15, the control circuit unit 17, the communication circuit unit 18, and the display unit 19 operate, and the portable telephone device is operated. The main body 1 is in a communication state or a standby state. The operation of each unit at this time is the same as that of the conventional mobile phone device, and the description is omitted.

The A / D converter 16 detects a voltage between the power supply connectors 11-1 and 11-2 and a voltage between both poles of the lithium ion battery cell 23, which are applied to the portable telephone device body 1. Connector 12 and power connector 11-
The voltage between the two is detected, converted into a digital signal, and output to the control circuit unit 17. The control circuit unit 17 determines the contact state of the power connectors 11-1 and 21-1 from the input voltage.

FIG. 2 is a diagram showing an equivalent circuit of the portable telephone device shown in FIG.

In FIG. 2, the electromotive force 35 (E) and the internal resistance 30 (r0) represent the lithium ion battery cell 23, and the load 36 (Z) represents the sum of the loads of the respective parts of the portable telephone device body 1. ing.

The contact resistances 31 (r1) and 32 (r
2) and 33 (r3) are power connectors 11-1 and 21 respectively.
-1, 11-2 and 21-2, voltage detection connectors 12 and 2
2 represents the contact resistance.

Now, in this equivalent circuit, the electromotive force 3
5, a current i flows through a closed circuit composed of the internal resistance 30, the contact resistance 31, the load 36, and the contact resistance 32.
Since the input impedance of the converter 16 is high, no current flows through the contact resistance 33.

Therefore, the voltage e1 at point A in the figure is (1)
Equation, voltage e2 at point B is represented by equation (2), and difference e2-e1 between voltages at point B and point A is represented by equation (3).

E1 = E− (r0 + r1 + r3) × i (1) e2 = E− (r0 + r3) × i (2) e2-e1 = r1 × i (3) Point B and A As can be seen from equation (3), the voltage difference at the point is a voltage drop at the contact resistance 31 and is a value proportional to the current i flowing through the mobile phone main body 1.

FIG. 3 shows changes in voltages e1 and e2.

In FIG. 3, the portion where both e1 and e2 are greatly reduced is at the time of maximum output transmission in which the largest current flows through the portable telephone device body 1. As can be seen from the figure, when the current i flowing through the mobile phone device body 1 increases, the difference between the voltages at the points B and A increases.

Further, since the difference between the voltages at points B and A changes depending on the magnitude of the contact resistance r1 between the power connectors 11-1 and 21-1, when this voltage difference is larger than the specified value,
It can be seen that a contact failure has occurred between the power connectors 11-1 and 21-1. The comparison with the specified value is not limited to the transmission of the maximum output, and can be performed in any use state. However, it is necessary to set the specified value in accordance with each use state.

Therefore, the A / D converter 16 is provided with the power supply connectors 11-1 and 11-1 applied to the main body 1 of the portable telephone device.
-2 and the voltage between the voltage detection connector 12 and the power supply connector 11-2, which is the voltage between both poles of the lithium ion battery cell 23, thereby detecting the power supply connector 1.
A contact failure between 1-1 and 21-1 can be detected.

Further, even when a contact failure occurs between the voltage detection connectors 12 and 22, no current flows through the contact resistance 33 (r2) between the voltage detection connectors 12 and 22, as described above. There is no voltage drop at the contact resistance 33 (r2), and the detection accuracy does not decrease.

When the contact failure between the power supply connectors 11-1 and 21-1 is detected, the control circuit section 17 displays a warning message such as "Please clean the connector" on the display section 19, and displays a warning message. To inform.

In the embodiment shown in FIG. 1, only the contact failure between the power supply connectors 11-1 and 21-1 is detected, but the voltage detection connector is also provided on the negative electrode side of the lithium ion battery cell 23. Is installed, and by detecting the voltage, a contact failure between the power connectors 11-2 and 21-2 can be detected.

FIG. 4 shows an equivalent circuit in this case.

In FIG. 4, the electromotive force 45 (E) and the internal resistance 40 (r0) represent the lithium ion battery cell 23, and the load 46 (Z) represents the sum of the loads of the respective parts of the main body 1 of the portable telephone. Contact resistance 41 (r1), 42 (r4), 4
3 (r2) are power connectors 11-1 and 21-1, 1
1-2 and 21-2, and the contact resistances of the voltage detection connectors 12 and 22 are shown.

The contact resistance 44 (r3) represents the contact resistance of a voltage detection connector (not shown) provided on the negative electrode side of the lithium ion battery cell 23.

In this equivalent circuit, as in the equivalent circuit shown in FIG.
1, a current i flows through a closed circuit formed by the load 46 and the contact resistor 42, but no current flows through the contact resistors 43 and 44 because the input impedance of the A / D converter 16 is high.

The voltage e1 at point A, the voltage e2 at point B, and the voltage e3 at point C in FIG. 4 are expressed by equations (4) to (6), respectively.

E1 = E− (r0 + r1 + r4) × i (4) e2 = E− (r0 + r4) × i (5) e3 = −r4 × i (6) Therefore, the contact resistance 41 The voltage drop at is e2-e1,
Since the voltage drop at the contact resistor 42 is represented by e3, the voltage drop between the power connectors 11-1 and 21-1 and 11
-2 and 21-2 can be detected.

Next, the battery deterioration detecting operation will be described.

The lithium ion battery cell 23 disposed in the battery pack 2 discharges, the remaining capacity of the battery is reduced, the voltage between terminals is reduced, and the internal resistance is slightly increased with the deterioration due to the life of the battery. It has the characteristic that the voltage drop in the receiving slot when the state transitions from standby to talking increases.

Therefore, the lithium ion battery cell 23
The battery life can be detected by measuring the internal resistance and the voltage drop of the receiving slot when the state transitions from standby to talk. The measurement of the internal resistance is performed by measuring a voltage between terminals of the lithium ion battery cell 23 and detecting a voltage drop due to the internal resistance.

However, the voltage between the terminals of the lithium ion battery cell 23 varies depending on the remaining capacity of the battery. Therefore, the voltage between the terminals of the portable telephone device main body 1 in two different states of power consumption is measured. By comparing the voltages, a voltage drop due to the internal resistance is detected.

The voltage drop at the time of the state transition from the standby state to the call is measured by measuring a voltage difference between the standby voltage immediately before the start of the call and the reception slot immediately after the start of the call or after a lapse of a predetermined time, for example, 10 seconds.

FIG. 5 shows a change in the voltage between the terminals of the lithium ion battery cell 23 when the portable telephone device 1 changes from the standby state to the talking state.

When the main body 1 of the portable telephone device is in the standby state, the control circuit section 17 constantly measures the voltage between the terminals of the lithium ion battery cell 23 input through the voltage detection connector 12 so that the user The measured value immediately before the user performs a key operation for starting a call (point A in FIG. 5) is stored.

Here, when the portable telephone device main body 1 enters a talking state, the average current consumption increases and the voltage input from the voltage detection connector 12 decreases. This is because the voltage drop in the internal resistance 30 (r0) and the battery characteristics of the lithium ion battery cell 23 increases as the load current increases, as shown in the equations (2) and (2).

Subsequently, the control circuit section 17 detects the voltage in the reception section at the point B where the user starts a telephone call and the voltage input from the voltage detection connector 12 is stable, as shown in FIG. Thus, the voltage difference dV1 is obtained.

Since the voltage difference dV1 is caused by the voltage drop and the battery characteristics in the internal resistance 30 of the lithium ion battery cell 23, when dV1 is larger than the specified value (dV1 'in FIG. 5), the internal resistance 30 increases. This indicates that the battery pack 2 has deteriorated.

The voltage difference dV2 between the reception section and the transmission section at point B in FIG. 5 is also generated by the internal resistor 30 (because the power consumption is different between the reception section and the transmission section), so that the deterioration of the impedance of the battery pack 2 is reduced. Can be diagnosed.

Further, the voltage difference to be detected is dV1 and dV2.
Not only that, it is needless to say that the deterioration of the battery pack 2 can be detected by detecting dV1 + dV2 and comparing it with a specified value.

FIG. 6 shows the power supply connectors 11-1 and 21-1 after the power of the portable telephone device body 1 shown in FIG. 1 is turned on.
5 is a flowchart showing an example of a process flow until a contact failure or deterioration of the battery pack 2 is detected.

First, the power of the mobile phone 1 is turned on (step 101), and the mobile phone 1 enters a standby state (step 102). Here, the control circuit unit 17
Stores the voltage of the voltage detection connector 12 digitally converted by the A / D converter 16 in a variable A (step 10).
3).

Next, the processing of the abnormality detection is stopped until the call is started (NO in step 104), the call is started (YES in step 104), and the state of the receiving section (YES in step 105) is set. The control circuit 17 is A / D
The voltage of the voltage detection connector 12 digitally converted by the conversion unit 16 is stored in a variable B (step 106).

Here, the difference A between the voltages of the voltage detection connectors 12 detected in the reception section in the standby state and the reception section in the talking state, respectively.
If −B is larger than the specified value (YE in step 107)
S), at the end of the call, the control circuit unit 17 displays on the display unit 19 that the battery is dead (step 108), and ends the abnormality detection processing (step 113).

If the voltage difference AB of the voltage detection connector 12 is equal to or smaller than a specified value (N in step 107).
O) In the state of the transmission section (YES in step 109),
The control circuit unit 17 detects the voltages of the power supply connector 11-1 and the voltage detection connector 12 (step 110). If the difference between the voltage of the voltage detection connector 12 and the voltage of the power supply connector 11-1 is larger than a specified value. (YE in step 111
S), at the end of the call, the control circuit unit 17 displays on the display unit 19 a message urging cleaning of the connector (step 112), and ends the abnormality detection processing (step 113).

If the difference between the voltage of the voltage detection connector 12 and the voltage of the power supply connector 11-1 is equal to or less than a specified value, the control circuit 17 determines that there is a poor contact between the power supply connectors 11-1 and 21-1 and that the battery pack It is determined that the deterioration of No. 2 has not occurred, and the abnormality detection processing ends (step 113).

In the abnormality detection process shown in FIG. 6, when the deterioration of the battery pack 2 is detected, the power connectors 11-1 and 11-2
Although the contact failure between 1-1 is not detected, it goes without saying that there is a processing method for detecting both.

[0064]

As described above, according to the present invention,
Since the main body of the mobile phone device detects the contact failure of the power connector and the deterioration of the battery and notifies the user, the user can eliminate the contact failure of the power connector and avoid using the deteriorated battery. The mobile phone device can always be used in a normal state.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a method and a device for detecting an abnormality of a mobile phone device according to the present invention.

FIG. 2 is a diagram showing an equivalent circuit of the mobile phone device shown in FIG.

FIG. 3 is a diagram showing changes in voltages e1 and e2.

FIG. 4 is an equivalent circuit of a device for detecting a contact failure between a positive electrode and a negative electrode of a power connector.

FIG. 5 is a diagram showing a change in a voltage between terminals of a lithium ion battery cell when the main body of the mobile phone device changes from a standby state to a talking state.

FIG. 6 is a flowchart showing the flow of abnormality detection.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cellular phone main body 2 Battery pack 11-1, 11-2 Power supply connector (cellular phone main body side) 12 Voltage detection connector (cellular phone main body side) 13 Power supply circuit part 14 Wireless circuit part 15 Antenna 16 A / D Conversion unit 17 Control circuit unit 18 Communication circuit unit 19 Display unit 21-1, 21-2 Power supply connector (battery pack side) 22 Voltage detection connector (battery pack side) 23 Lithium ion battery cell 30, 40 Internal resistance 31, 32 , 33, 41, 42, 43, 44 Contact resistance 35, 45 Electromotive force 36, 46 Load

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hayato Shiina 21 Toshiba Communication Technology Co., Ltd. 3-1-1 Asahigaoka, Hino-shi, Tokyo

Claims (9)

[Claims] 1. A mobile phone device for electrically connecting a removable battery pack to a mobile phone device main body via a power connector, wherein a voltage detection connector for electrically connecting the battery pack and the mobile phone device main body. And detecting the voltage detection connector voltage and the power supply connector voltage, and when the difference between the voltage detection connector voltage and the power supply connector voltage is larger than a preset value, the power supply connector A method for detecting an abnormality in a mobile phone device, comprising determining that contact is poor. 2. A portable telephone device in which a detachable battery pack is electrically connected to a portable telephone device main body via a power connector, wherein the portable telephone device main unit has different first and second power consumptions. And detecting a voltage between terminals of the battery pack, and when a difference between the terminal voltage in the first state and the terminal voltage in the second state is larger than a preset value, A method for detecting an abnormality in a mobile phone device, comprising determining that a battery pack has deteriorated. 3. The method according to claim 2, wherein the terminal voltage is detected from the power connector voltage. 4. The mobile phone according to claim 2, wherein the inter-terminal voltage is detected from a voltage detection connector voltage of a voltage detection connector that electrically connects the battery pack and the mobile phone device body. An abnormality detection method for a telephone device. 5. The mobile communication device according to claim 2, wherein the first state is a standby state of the mobile phone, and the second state is a transmission state of the mobile phone during a call. 3. The method for detecting an abnormality of a mobile phone device according to 3. 6. The mobile phone device according to claim 2, wherein the first state is a standby state of the mobile phone device, and the second state is a reception state of the mobile phone device during a call. 3. The method for detecting an abnormality of a mobile phone device according to 3. 7. The portable telephone device according to claim 1, wherein the first state is a receiving state of the portable telephone device during a call, and the second state is a transmitting state of the portable telephone device during a call. Item 4. The method for detecting an abnormality of a mobile phone device according to item 2 or 3. 8. A portable telephone device for electrically connecting a detachable battery pack to a portable telephone device main body via a power connector, for detecting a voltage for electrically connecting the battery pack and the portable telephone device main body. A connector, voltage detecting means for detecting the voltage detecting connector voltage and the power connector voltage, and comparing a difference between the voltage detecting connector voltage and the power connector voltage detected by the voltage detecting means with a preset value. And a determining unit that determines, as a result of the comparison by the comparing unit, that a contact failure of the power connector occurs when the difference between the voltage detection connector voltage and the power connector voltage is greater than the preset value. An abnormality detection device for a mobile phone device. 9. A portable telephone device in which a detachable battery pack is electrically connected to a portable telephone device body via a power connector, wherein the portable telephone device body has first and second states in which power consumption is different. A voltage detecting means for detecting a voltage between terminals of the battery pack at the time of; and a calculation for calculating a difference between the terminal voltage in the first state and the terminal voltage in the second state detected by the voltage detecting means. Means, comparing means for comparing the difference between the terminal voltages calculated by the calculating means with a preset value, and when the difference between the terminal voltages is larger than the preset value by comparison of the comparing means. A determination unit for determining that the battery of the battery pack has deteriorated, the abnormality detection device for a mobile phone device.