JPH0133787B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a battery status reporting method and device for a vehicle that reports a plurality of abnormalities depending on the energy status of the vehicle's battery.

Conventionally, there is an ammeter of this kind that indicates whether the car battery is in a discharged or charged state, and when the car battery is in a discharged state while the engine is running, it indicates that the car battery is under severe use. is displayed. Furthermore, there is an alarm device that detects the voltage across an in-vehicle battery, determines whether the detected value is lower than a predetermined set value, and issues an alarm. This alarm device warns that the remaining amount of electricity stored in the on-board battery of an electric vehicle has fallen below a set value.

However, the ammeter simply displays the current value of the charging/discharging state of the on-vehicle battery, and does not have a function to determine whether the performance of the on-vehicle battery has deteriorated. Furthermore, the above-mentioned warning device simply determines that the performance of the vehicle battery has deteriorated and issues a warning.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle battery condition reporting device that can identify different abnormal battery conditions depending on the engine temperature condition of the vehicle and provide an appropriate report to the driver. This is the purpose.

In order to achieve the above object, the present invention, as shown in FIG. 5, includes a start detecting means for detecting the starting state of the engine of the vehicle, and a voltage of the vehicle battery when the voltage decreases when the engine is starting to operate. a voltage detection means for detecting a temperature of the engine; an outside temperature detection means for detecting a temperature outside the vehicle; and a voltage detection means for detecting a temperature of the engine; input means for inputting a battery voltage detected by the voltage detection means, an engine temperature detected by the engine temperature detection means, and an outside temperature detected by the outside temperature detection means; and an engine temperature input by the input means. low temperature determination means for determining the low temperature state of the engine based on the relationship between the temperature and the outside temperature; a first normality determination means for determining whether the battery voltage is out of the predetermined normal level; and a first report signal indicating battery performance deterioration when the first normality determination means determines that the battery voltage deviates from the predetermined normal level. a first report signal generating means for generating a first report signal generating means, and determining a high temperature state in which the engine is sufficiently warmed based on the engine temperature inputted by the input means when the determination by the low temperature determination means is negative; a high temperature determination means; a second normality determination means for determining whether or not the battery voltage inputted by the input means is at a predetermined normal level when the determination by the high temperature determination means is affirmative; a second warning signal generating means for generating a second report signal indicating that the charging system for the battery is abnormal when the normality determining means determines that the battery voltage is out of the normal level; , reporting means for receiving the first and second report signals from the first and second report signal generating means and reporting the corresponding abnormal states of the battery into the vehicle interior. It is said that

The present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.

1 is an outside temperature sensor that detects the temperature outside the vehicle interior and generates an outside temperature signal; 2 is a cooling water temperature sensor that detects the temperature of engine cooling water and generates a water temperature signal; 3
is a liquid level sensor that detects the level of battery liquid in the battery 5 in each storage chamber and generates a liquid level signal. Reference numeral 4 denotes a peak value detection circuit as a detection means, which detects an instantaneous drop in voltage of the battery 5 when the starter is activated at the start of starting the automobile. A peak detector that holds the maximum value of the output of the first operational amplifier and resets the held value when it receives an external reset signal, and a second peak detector that inverts the voltage held by this peak detector. The second operational amplifier generates an output from the second operational amplifier as a detection signal for the instantaneous voltage drop. 6 is an A/D converter that converts analog signals into digital signals, which includes an outside temperature signal from the outside temperature sensor 1, a water temperature signal from the cooling water temperature sensor 2, a liquid level signal from the liquid level sensor 3, and a peak value detection circuit 4. This is to sequentially convert the detected signals into digital signals.
A starter switch 7 generates a starting signal when the vehicle key is inserted into the starter terminal of the key box. 8 is a DC/DC converter that converts the 12V voltage of battery 5 to a stabilized voltage of 5V.
Even if the voltage changes up to 16V, a stabilized voltage of 5V can be obtained.

9 is a microcomputer that executes digital arithmetic processing of software according to a predetermined control program, and constitutes arithmetic processing means;
It is connected to a crystal resonator 10 of several MHz and is activated by receiving a stabilized voltage of 5V from an on-board battery 5 through a DC/DC converter 8. At this time, digital signals are input from the outside temperature sensor 1, cooling water temperature sensor 2, liquid level sensor 3, and peak value detection circuit 4 via the A/D converter 6. Various calculations and determinations are performed using the digital signals obtained, and when it is determined that the energy state of the on-vehicle battery 5 is abnormal, an audio signal is generated to indicate the abnormal state. The microcomputer 9 includes a read-only memory (ROM) that stores control programs that define procedures for various arithmetic processes, and a central processing unit that sequentially reads out the control programs in this ROM and executes the corresponding arithmetic operations. (CPU), a memory (RAM) that temporarily stores various data related to the arithmetic processing of this CPU and can read the data by the CPU, and a reference clock pulse for the various arithmetic operations described above, together with a crystal oscillator 10. It is made of a one-chip large-scale integrated circuit (LSI), and its main parts are a clock generator that generates clock signals, and an input/output circuit that adjusts the input and output of various signals.

Reference numeral 11 denotes a digital speech synthesizer, which is equipped with an audio data ROM in which audio data for generating audio is stored in each predetermined area in advance, and which stores audio data in a predetermined area corresponding to the audio signal sent from the microcomputer 9. This system uses the PARCOR system to synthesize speech and generate speech from the speaker 12, and when the speech generation is finished, a speech end signal is sent to the microcomputer 9. The voice synthesizer 11 and the speaker 12 constitute a reporting means.

The operation in the above configuration is shown in Figures 2 and 3.
This will be explained with reference to the calculation flowchart shown in FIG. FIG. 2 is a calculation flowchart showing the overall calculation processing by the control program of the microcomputer 9, FIG. 3 is a calculation flowchart showing the detailed calculation processing of the battery monitoring routine in FIG. 2, and FIG.
It is a calculation flow chart showing detailed calculation processing of the sound generation routine in the figure.

Now, when the various components 1 to 12 shown in FIG. 1 are installed in an automobile and the power supply system is connected, each part of the electrical system becomes operational. Then, in the microcomputer 9, the start step 1 shown in FIG.
The arithmetic processing is started from 00, and the program proceeds to an initial setting routine 200 in which registers, counters, latches, etc. in the microcomputer 9 are set to initial states necessary for starting the arithmetic processing. This set operation requires a starting club, T ₀ flag, and T ₀ +1, which will be described later.
flag, T ₀ +2 flag, T ₀ +3 flag cancellation,
Setting of K = K ₀ + 4 at specified address K, old peak voltage
Vso = 0 setting and number of times data N, Ns
This includes settings such as N=1 and Ns=0.

Then, the process proceeds to battery monitoring routine 300.
It executes arithmetic processing to monitor various states related to the battery 5, proceeds to a sound generation routine 400, executes arithmetic processing to generate a sound for the abnormality item determined in the battery monitoring routine 300, and performs various display calculations. Proceed to routine 500.
Although various sensors and display circuits are not shown in FIG. 1, this various display calculation routine 500 executes calculation processing to calculate and display the time, fuel consumption, fuel efficiency, cruising distance, etc. ,
The process returns to the battery monitoring routine 300. Thereafter, the arithmetic processing from the battery monitoring routine 300 to the various display arithmetic routines 500 is repeatedly executed at intervals of several milliseconds to several hundred milliseconds, regardless of the driving state of the vehicle.

Then, a battery monitoring routine 300 in the above-mentioned repetitive calculation is performed when the vehicle has not started driving.
When the start signal is generated from the starter switch 7, the arithmetic processing is started at the starter switch determination step 301 in FIG. 3, and it is determined whether or not the starter switch 7 is generating a starting signal. Then, the determination becomes NO, and the process proceeds to start flag determination step 302. In this start flag determination step 302, it is determined whether or not the start flag is set. However, since the start flag is still cleared in the initial setting, the determination becomes NO, and the battery monitoring routine 302 One calculation process is completed. In the next voice generation routine 400, address determination step 4 in FIG.
The calculation process starts from 01, and the designated address K is
It is determined whether or not K ₀ +4, but since the designated address K is still set to K ₀ +4 in the initial settings, the determination becomes YES, and one calculation process of the sound generation routine 400 is performed. Finish.

Then, the battery monitoring routine 300, the sound generation routine 400, and the various display calculation routines 5
00 is being repeatedly executed, when the vehicle key is inserted into the starter terminal of the key box to start driving, the starter switch 7
Since a starting signal is generated, when the starter switch determination step 301 in FIG. 3 is reached, the determination becomes YES. Then, the process advances to a start flag setting step 309, where the start flag is set, and one calculation process of the battery monitoring routine 300 is completed. Thereafter, while the starter switch 7 generates a starting signal, the above calculation process is repeated. At this time,
A large current for starting the engine flows from the battery 5 to a starter (not shown), and the battery voltage drops instantaneously. This decreased battery voltage is detected and held by the peak value detection circuit 4.

When the engine is started and the vehicle key is released from the starter terminal, the starter switch 7 no longer generates a starting signal, so when the starter switch determination step 301 in FIG. 3 is reached, the determination becomes NO. Then, the process advances to a start flag determination step 302, where the determination becomes YES since the start flag has been set, and the process advances to an address setting step 303, where the designated address K is set to _K0 , and the process advances to a signal input step 304. In this signal input step 304, the A/D converter 6 is controlled to output the outside temperature sensor 1, cooling water temperature sensor 2, liquid level sensor 3,
Digital signals obtained by converting each analog signal from the peak value detection circuit 4 (outside temperature Tam, cooling water temperature
Tw, liquid level L _B1 to _{L B4} , and peak voltage Vs) are input and stored sequentially. Then, coefficient calculation step 305
The process proceeds to step 306, where the temperature correction coefficient K is calculated according to the outside temperature Tam using the characteristic relationship shown in the figure, and the process proceeds to correction step 306 where it is corrected by the peak voltage Vs correction coefficient K (Vs=K・Vs). Judgment step 3
Proceed to 07. In this low temperature determination step 307,
It is determined whether the engine temperature has fallen sufficiently or not by comparing the coolant temperature Tw with the outside temperature +10°C. If the coolant temperature Tw is below the outside air temperature +10°C and the engine temperature has fallen sufficiently, the judgment is YES. The process then proceeds to normal region determination step 378. In this normal region determination step 308, the peak voltage Vs
Determine whether or not is greater than a predetermined minimum reference voltage V _L (the lowest voltage that can drive the starter, predetermined according to the vehicle type),
When the peak voltage Vs is higher than the lowest reference voltage _VL (when the battery 5 has sufficiently large energy), the determination becomes YES and the process proceeds to deviation determination step 310. This deviation determination step 31
0, it is determined whether the peak voltage Vs has decreased by a predetermined judgment level △V or more from the previously stored old peak voltage Vso, but because the old peak voltage Vso is initially set to 0. The determination becomes NO, and the process proceeds to reset step 311.
Then, in this reset step 311, the number of times data Ns is reset to 0, and then in the storage step 319.
The process proceeds to step 320, where the peak voltage Vs is stored as the old peak voltage Vso, and the process proceeds to liquid level determination step 320.
In this liquid level determination step 320, the liquid level
It is determined whether or not all of L _B1 to L _B4 are equal to or higher than a predetermined determination level L ₀ , and if all of the liquid levels L _B1 to L _B4 are equal to or higher than determination level L ₀ , the determination becomes YES. Then, the process proceeds to a reset signal sending step 322, where a reset signal is sent to the peak value detection circuit 4, and the process proceeds to a start flag release step 323, where the start flag is released, and one calculation process of the battery monitoring routine 300 is completed.

Then, in the address setting step 303 in the battery monitoring routine 300, the designated address K is set.
Voice generation routine 4 because K is set to ₀
The determination at the address determination step 401 in FIG. 4 at 00 becomes NO, and the T flag determination step 402
Proceed to. In this T flag determination step 402, K
It is determined whether the T flag is set based on the contents of the address, and since K=K ₀ at this time, it is determined whether the T ₀ flag is set based on the contents of the K ₀ address. However, because the T ₀ flag is cleared in the initial settings, the judgment becomes NO.
Proceed to addition step 410. Then, in this addition step 410, the specified address K is updated (K=K+1
=K ₀ +1) and returns to address determination step 401. Then, K ₀ + 1 address, K ₀ + 2 address, K ₀ + 3
T ₀ +1 flag, T ₀ +2 flag,
Since all of the T ₀ +3 flags are cleared by default, the arithmetic processing from address determination step 401 to T flag determination step 402 and addition step 410 is repeated, and the updated specified address K is added in addition step 410. When becomes K ₀ +4, the determination in the address determination step 401 becomes YES, and one calculation process of the voice generation routine 400 is completed.

When the battery monitoring routine 300 is reached after passing through the various display routines 500, the determination at the starter switch determination step 301 in FIG. 3 is NO.
The process proceeds to start flag determination step 302, where the determination is made because the start flag has been cleared.
The result is NO, and one calculation process of the battery monitoring routine 300 is completed. Also, voice generation routine 4
00, the determination in the first address determination step 401 in FIG. 4 is YES, and the first
Finish the calculation process. Thereafter, the calculation processes of the battery monitoring routine 300, the sound generation routine 400, and the various display calculation routines 500 are repeated. This repeated calculation is performed even when the vehicle is stopped.

When the vehicle key is inserted into the starter terminal when all the various states related to the battery 5 are normal, a starting signal is generated from the starter switch 7. Therefore, in the battery monitoring routine 300, the process moves from starter switch determination step 301 to start flag setting step 309. Execute the forward calculation process. Then, when the start flag is set in the start flag setting step 309 and the starter switch 7 no longer generates a start signal, the determination in the start flag determination step 302 that comes via the starter switch determination step 301 becomes YES. and,
Address setting step 303, signal input step 30
4 coefficient calculation step 305, correction step 30
6. One calculation after going through low temperature determination step 307, normal region determination step 308, deviation determination step 310, reset step 311, storage step 319, liquid level determination step 320, reset signal sending step 322, and start flag release step 323. Finish processing. From the next time onwards, since the start flag has been cleared, when the start flag determination step 302 is reached, the determination will be NO, and one calculation process of the battery monitoring routine 300 will be completed. The arithmetic processing described above is executed each time the vehicle key is turned on to the starter terminal, that is, each time the vehicle starts to be started.

Thereafter, as the battery 5 is used harshly and its energy gradually decreases, the peak voltage Vs corrected at correction step 306 in FIG. 4 gradually becomes smaller. Then, when the peak voltage Vs becomes lower than the previous old peak voltage Vso by more than the judgment level ΔV, when the deviation judgment step 310 is reached, the judgment becomes YES.
Then, the process advances to addition step 312 to add the number of times data.
Add and update Ns (Ns=Ns+1=0+1=1),
Proceed to the number of times judgment step 313 and obtain the number of times data Ns.
Since is 1, the determination becomes NO, and the operation proceeds to storage step 319. After that, when it is determined in the deviation determination step 310 that occurs every time the engine is started that the peak voltage Vs is smaller than the old peak voltage Vso by ΔV or more, the calculation proceeds to the storage step 319 via the addition step 312 and the number of times determination step 313. Execute. If this state, that is, the state in which the energy of the battery 5 tends to decrease, occurs three or more times in a row, the number of times data is added and updated in addition step 312.
Ns becomes a value of 3 or more. Therefore, the next determination step 313 makes a YES determination, and the process proceeds to a To flag setting step 314 to set the To flag at address _K0 , and proceeds to a storage step 319. As a result, in the voice generation routine 400,
When the T flag determination step 402 is reached via the address determination step 401, the determination becomes YES because the To flag is set at the Ko address. Then, the process proceeds to count determination step 403, and since the count data N is set to N=1 in the initial setting, the determination becomes YES, and the process proceeds to addition step 405.
Proceed to add and update the number of times data N (N=N+1=
1+1=2), and the process proceeds to count judgment step 406, where the judgment is made because the count data N is 2.
If the answer is YES, the process advances to the audio signal sending step 407. In this audio signal sending step 407, an audio signal is sent that specifies a predetermined area in the audio data ROM of the audio synthesizer 11 in correspondence with the designated address K, in this case the Ko address. In a predetermined area of the audio data ROM corresponding to this Ko address, audio data for generating a discharge warning in audio is stored, and the audio data is synthesized and emitted from the speaker 12 to say "Battery Ga Hodengimides". Generate sound.

Then, in this voice generation routine 400 again, when the number determination step 403 is reached via the address determination step 401 and the T flag determination step 402, the determination becomes NO because the number data N is 2, and it is determined that the voice has ended. Step 404
Proceed to. In this audio end determination step 404,
It is determined whether or not a voice end signal has been generated by the voice synthesizer 11, and if the voice end signal has not yet been generated, the determination becomes NO and one calculation process is completed. Then, repeat the above calculation process,
When the voice synthesizer 11 completes the voice synthesis and issues a voice end signal, a voice end determination step 40 is performed.
4, the determination becomes YES due to the change in signal level caused by the generation of the audio end signal. and,
Proceeding to addition step 405, the number data N is added and updated (N=N+1=2+1=3), and the process proceeds to number determination step 406, where since the number data N is 3, the determination becomes YES, and the audio signal transmission step is performed. Proceeding to step 407, the voice signal corresponding to the Ko address is sent to the voice synthesizer 11, and one calculation process of the voice generation routine 400 is completed. As a result, the speaker 12 again generates the sound "Batteriga hodengimides".

Then, when the voice synthesis for generating the voice is completed and a voice end signal is generated from the voice synthesizer 11, when the voice end determination step 404 in FIG. 4 is reached, the determination becomes YES. Then, the process proceeds to addition step 405, where the addend data N is added and updated (N=N+1=3+1=4), and the process proceeds to addition judgment step 406, where since the number data N is 4, the judgment becomes NO, and the Reset step 4
Proceed to step 08, reset the number of times data N to 1, and
Proceeding to flag release step 409, the To flag corresponding to the designated address Ko at that time is cleared, and the process advances to addition step 410, where the designated address K is updated (K=K+
1=Ko+1) and returns to address determination step 401. And To+1 flag, To+2 flag,
Since none of the To+3 flags are set, the arithmetic processing from address determination step 401 to T flag determination step 402 and addition step 410 is repeated, and when the designated address K updated in addition step 410 becomes Ko+4, the address is The determination at determination step 401 becomes YES, and the one calculation process ends.

Thereafter, when the accumulated energy of the battery 5 is increased by driving a long distance in response to the voice warning, the peak voltage Vs corrected in the correction step 306 of FIG. 5 becomes the old peak voltage up to the previous time.
It will be a larger value than Vso. As a result, the determination in the deviation determination step 310 that comes via the normal region determination step 308 becomes NO. Then, the process proceeds to count reset step 311 to reset the count data Ns to 0, and then to storage step 319.
Execute the arithmetic processing proceeding to . Therefore, when the engine is started, the speaker 12 does not emit a discharge warning sound.

On the other hand, when the energy of the battery 5 decreases significantly, the peak voltage Vs corrected in the correction step 306 of FIG. 4 becomes a value smaller than the reference minimum voltage _VL . Therefore, the normal region determination step 30
When it reaches 8, the judgment becomes NO and To+1
Proceed to flag setting step 315 to set the To+1 flag at address Ko+1, and then proceed to storage step 319.
Execute the arithmetic processing proceeding to . And this To+
By executing the arithmetic processing of the sound generation routine 400 in FIG.
The audio signal corresponding to address 1 is sent to the audio synthesizer 11.
Occurs twice. Then, the voice synthesizer 11 synthesizes a voice instructing charging to the voice signal, and causes the speaker 12 to generate the voice "I want the battery to be charged" twice.

Also, when the charging system leading to battery 5 becomes abnormal and the engine is sufficiently warm (Tw
≧50℃, Tw≧Tam+10℃) When the peak voltage Vs corrected in the correction step 306 in FIG. 3 becomes a value smaller than the reference minimum voltage _VL , the judgment in the low temperature judgment step 307 becomes NO, Proceeding to decision step 316, the decision becomes YES,
Proceeding to normal region determination step 317, the determination is made.
NO, To+2 flag setting step 318
Go to and set the To+2 flag at address Ko+2,
Arithmetic processing that proceeds to liquid level determination step 320 is executed. Then, by executing the arithmetic processing of the voice generation routine 400 shown in FIG. 4 with respect to the setting of the To+2 flag, the voice signal corresponding to address Ko+2 is generated twice in the voice synthesizer 11. and,
The voice synthesizer 11 synthesizes the voice of the charging system abnormality warning with the voice signal, and causes the speaker 12 to generate the voice "I don't know what to do" twice.

Further, when the battery liquid in at least one of the battery liquids in the respective storage chambers of the battery 5 becomes insufficient, the signal input step 304 in FIG.
At least one of the liquid levels L _B1 to _{L B4} input and stored becomes a value smaller than the determination level Lo.
Therefore, when the liquid level judgment step 320 is reached, the judgment becomes NO, and the process proceeds to the To+3 flag setting step 321, where the To+3 flag is set at address Ko+3, and the reset signal sending step 322 is performed.
Execute the arithmetic processing proceeding to . And this To+
By executing the arithmetic processing of the sound generation routine 400 in FIG.
The audio signal corresponding to address 3 is sent to the audio synthesizer 11.
Occurs twice. Then, the voice synthesizer 11 synthesizes the voice of the battery fluid replenishment instruction with respect to the voice signal, and the speaker 12 generates the voice "I want the battery to be refilled" twice.

In addition, in the above embodiment, various abnormal states of the battery 5 are reported on the premise that the starter is normal. It may also be possible to determine whether something is on the starter side and report this as well. In addition, regarding this report, although the voice synthesizer 11 and the speaker 12 are used to make a voice report, it is also possible to display an abnormality report using a display device such as a dot matrix. You may use it together.

Further, although the microcomputer 9 is shown as the arithmetic processing means, a hard logic configuration using electronic circuits may be used.

Furthermore, although the peak voltage Vs based on the detection signal from the peak value detection circuit 4 is stored as the old peak voltage Vso, the number of old peak voltages Vso to be stored is further increased and its change tendency is analyzed by statistical processing. It may also be possible to determine and report various abnormal conditions.

Furthermore, although the microcomputer 10 is shown to be activated all the time, it may be activated only when the vehicle is being driven. In this case, the old peak voltage Vso
Storage data such as the following are stored in non-volatile memory.

As described above, according to the present invention, when the engine low temperature state is determined based on the outside air temperature and the engine temperature using the battery voltage that has decreased when the engine is started, if the battery voltage is out of the normal level, the engine low temperature state is determined. It is possible to report the performance deterioration of battery voltage when the engine is started and to alert the driver.
Additionally, when the engine is restarted when the engine is at high temperature, if the battery voltage is outside the normal level despite the engine being at high temperature, the battery charging system is reported to be abnormal and the driver is alerted. Therefore, there is an excellent effect in that two different abnormal states can be identified and different reports can be made based on the battery voltage that drops at the time of starting the engine in accordance with the temperature state of the engine.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention;
Figure 2 is a calculation flowchart showing the overall calculation processing of the microcomputer in Figure 1, Figure 3 is a calculation flowchart showing the detailed calculation processing of the battery monitoring routine in Figure 2, and Figure 4 is the calculation flowchart shown in Figure 2. FIG. 5 is a block diagram showing the structure of the present invention. 4...Peak value detection circuit as detection means, 5
...Battery, 7... Starter switch, 9...
Microcomputer as a calculation processing means, 1
1, 12...Speech synthesizer and speaker constituting reporting means.

Claims (1)

[Scope of Claims] 1. Start detection means for detecting a start state of the engine of a vehicle; voltage detection means for detecting the voltage of the vehicle battery when the voltage drops during the start state of the engine; and temperature of the engine. an engine temperature detection means for detecting the temperature outside the vehicle; an outside temperature detection means for detecting the temperature outside the vehicle; and a battery voltage detected by the voltage detection means and the battery voltage detected by the voltage detection means when the start detection means detects the start state of the engine. an input means for inputting the engine temperature detected by the engine temperature detection means and the outside temperature detected by the outside temperature detection means; a low temperature determination means for determining a low temperature state; and a first normality determination means for determining whether or not the battery voltage inputted by the input means is at a predetermined normal level when the determination by the low temperature determination means is affirmative. , a first report signal generating means for generating a first report signal indicating battery performance deterioration when the first normality determining means determines that the battery voltage is out of the predetermined normal level; , high temperature determination means for determining a high temperature state in which the engine is sufficiently warmed based on the engine temperature input by the input means when the determination by the low temperature determination means is negative; and the determination by the high temperature determination means. is affirmative, a second normality determining means determines whether the battery voltage inputted by the input means is at a predetermined normal level; and the second normality determining means determines whether the battery voltage is at the normal level. a second warning signal generating means that generates a second report signal indicating that the charging system for the battery is abnormal when it is determined that the battery is disconnected from the battery; and the first and second report signal generation means. A battery status reporting device for a vehicle, comprising: reporting means for receiving first and second report signals from the means and reporting the corresponding abnormal states of the battery into a vehicle interior.