BATTERY CONDITION MEASURING METHOD

Abstract

A battery state measurement procedure comprises the following steps. A voltage detection circuit (102) is connected to a motor (202) and a battery (204). The battery (204) supplies a starting voltage (206) to the motor (202) to start the motor (202). The voltage detection circuit (102) detects the starting voltage (206) to obtain a minimum starting voltage value (208). The voltage detection circuit (102) sends the minimum starting voltage value (208) to a comparator (104). The comparator (104) compares the minimum starting voltage value (208) and a starting voltage threshold value (210) to obtain a battery state signal (212). The comparator (104) sends the battery state signal (212) to an indicator (106). The display (106) shows the battery status signal (212).

Description

Background of the revelationTechnical field

[0001] The present invention relates to a measuring method and in particular to a battery condition measuring method. Description of the state of the art

[0002] A car battery (or battery container) is used to start and supply power to the car's engine starter motor, so the car's battery is very important. After prolonged use, the internal resistance of the car's battery increases, causing the car's battery to gradually age and impair its ability to start and supply power to the car's engine starter motor. Therefore, measuring the lifespan of the car's battery is very important.

[0003] Currently, there are many methods for measuring the life status of the car's battery, but all of these methods require removing the car's battery from the fixed ends of the power connectors of the car's engine starter motor, which is very inconvenient.

[0004] In general, the specifications of the fuel-powered car's lead-acid battery are as follows: 1. Battery voltage: 12 volts or 24 volts. 2. Battery capacity (ampere hours; AH): The time required to discharge the lead-acid battery at a rated current until the battery voltage reaches the lowest rated voltage is the battery capacity (AH). 3. Cold Cranking Amps (CCA): The maximum cranking amperage of the lead-acid battery in an environment of -18 degrees Celsius.

[0005] A state-of-the-art battery life measurement tool is to simulate and control the load current and load time, and then estimate the current battery capacity (AH) under test as the inverse, and then input the battery capacity (AH) of the original battery model specification, and then compare and calculate the decay ratio of the current battery capacity (AH) under test, which is an indicator of the state of health (SoH).

[0006] The above-mentioned state-of-the-art battery life measuring instrument has the following disadvantages: 1. Testing the battery requires removing the battery terminals, which is very laborious. If the battery terminals are not securely reconnected, the vehicle's system is vulnerable to problems and poses risks. 2. The measurement accuracy is not high because the measurement is performed by simulating the discharge.

[0007] The following two points are the reasons why the prior art discharge type battery life measuring instrument cannot accurately determine the difference between the capacity (AH) of the currently tested battery and the capacity (AH) of the original new battery: 1. Because the simulated starting current differs greatly from the original factory specification CCA. 2. Because the battery storage capacity (AH) of the lead-acid battery is affected by the ambient temperature. Summary of the invention

[0008] In order to solve the above-mentioned problems, it is an object of the present disclosure to provide a battery condition measuring method.

[0009] To achieve the above-mentioned object of the present disclosure, the battery condition measurement method of the present disclosure is applied to a digital measuring instrument and a load device. The digital measuring instrument includes a voltage detection circuit, a comparison unit, and a display. The load device includes a motor and a battery. The battery condition measurement method includes the following steps. The voltage detection circuit of the digital measuring instrument is connected to the motor of the load device and the battery of the load device. The battery of the load device supplies a starting voltage to the motor of the load device to start the motor of the load device. The voltage detection circuit of the digital measuring instrument detects the starting voltage to obtain a minimum starting voltage value.The voltage detection circuit of the digital meter sends the minimum starting voltage value to the digital meter's comparison unit. The digital meter's comparison unit compares the minimum starting voltage value and a starting voltage threshold to obtain a battery status signal. The digital meter's comparison unit sends the battery status signal to the digital meter's display. The digital meter's display shows the battery status signal.

[0010] Furthermore, in an above-mentioned embodiment of the battery condition measurement method of the present disclosure, the battery condition measurement method further includes the following step: The comparison unit of the digital measuring instrument sends the minimum starting voltage value to the display of the digital measuring instrument.

[0011] Furthermore, in an above-mentioned embodiment of the battery condition measurement method of the present disclosure, the battery condition measurement method further includes the following step: The display of the digital measuring instrument simultaneously displays the battery condition signal and the minimum starting voltage value.

[0012] Furthermore, in an above-mentioned embodiment of the battery condition measurement method of the present disclosure, the battery condition measurement method further includes the following step. The display of the digital meter alternately displays the battery condition signal and the minimum starting voltage value.

[0013] Furthermore, in an above-mentioned embodiment of the battery state measurement method of the present disclosure, the minimum starting voltage value is greater than or equal to the starting voltage threshold; The battery state signal is a normal signal indicating that the battery of the load device is normal.

[0014] Furthermore, in an above-mentioned embodiment of the battery state measurement method of the present disclosure, the minimum starting voltage value is smaller than the starting voltage threshold; the battery state signal is an abnormal signal indicating that the battery of the load device is abnormal.

[0015] Furthermore, in one embodiment of the above-mentioned battery state measurement method of the present disclosure, the load device is a car using a 12-volt system; the starting voltage threshold is 6 volts.

[0016] Furthermore, in one embodiment of the above-mentioned battery state measurement method of the present disclosure, the load device is a car using a 24-volt system; the starting voltage threshold is 10 volts.

[0017] Furthermore, in one embodiment of the above-mentioned battery condition measurement method of the present disclosure, the digital measuring instrument is a portable digital measuring instrument. The comparison unit is a microprocessor or a comparator circuit.

[0018] Moreover, in one embodiment of the above-mentioned battery state measuring method of the present disclosure, the battery of the load device is fully charged to be detected by the voltage detection circuit of the digital measuring instrument.

[0019] The advantage of the present disclosure is that it can easily measure the life state of the battery of the load device.

[0020] For a better understanding of the technology, method, and effect of the present disclosure to achieve the intended purposes, reference is made to the detailed descriptions and figures of the present disclosure listed below. It is believed that the purposes, properties, and features of the present disclosure can be understood in depth and specifically. However, the figures are for reference and description purposes only; the present disclosure is not limited by the figures. Brief description of the drawings Fig. 1 shows a flowchart of an embodiment of the battery state measurement method of the present disclosure. Fig. 2 shows a block diagram of an embodiment applied to the battery state measurement method of the present disclosure. Fig. 3 shows a schematic representation of a voltage range of the present disclosure. Detailed description

[0021] In the present disclosure, numerous specific details are provided to provide a thorough understanding of embodiments of the disclosure. However, those skilled in the art will recognize that the present disclosure may be practiced without one or more of the specific details. In other instances, well-known details are not shown or described in order not to obscure aspects of the present disclosure. For an explanation of the technical content and to more fully describe the present disclosure, reference is made to the figures:

[0022] The following content first describes the origin and concept of this disclosure:

[0023] An important specification of a car battery is: How much power can the car battery deliver instantly when the car's engine (or power unit) reaches its maximum starting current? Instant starting power P start = I start * V start , where I start the starting current (namely starting current, referred to as CA) and V start is the engine starting voltage; as the battery ages, the internal resistance of the battery increases and the battery's ability to store energy decreases (assuming the battery is fully charged). When the engine of the same car is started, the current I startlargely similar; therefore, when the car engine is started, the stored energy of the aging battery decreases due to the reduction in the engine's starting voltage (due to battery aging); that is, the instantaneous starting output of the battery decreases due to the increasing aging of the battery's internal resistance. In addition, because the battery's starting voltage is too low, the car's engine and electrical control system cannot start smoothly.

[0024] According to the standard specification ISO 16750-2 Part 2 Electrical Loads, Section 4.6.3 Starting Profile, the vehicle's electrical load must adapt to and pass a test of the simulated car battery voltage waveform (which has a minimum voltage). If the car uses the 12-volt system, this minimum voltage is 6 volts; if the car uses the 24-volt system, this minimum voltage is 10 volts. This is because when the car's engine is started (at the moment of starting, the car's battery voltage drops suddenly), if the dropping voltage of the car's battery is lower than the minimum voltage, the car's electrical load will not operate normally. This is because the present disclosure determines whether the battery is suitable / normal or not based on the minimum voltage and the sudden voltage drop of the battery.

[0025] Thus, in the present disclosure, the car battery does not need to be removed from the car engine; when the car engine is started (at the moment of starting, the voltage of the car battery suddenly drops), the present disclosure directly measures whether the lowest value of the dropping voltage of the car battery can be greater than or equal to the above-mentioned minimum voltage to determine whether the battery is fit / normal.

[0026] The following content describes the details of the present disclosure:

[0027] Fig. 1 shows a flowchart of an embodiment of the battery state measurement method of the present disclosure. It is simultaneously Fig. 2, which shows a block diagram of an embodiment applied to the battery condition measurement method of the present disclosure. The battery condition measurement method of the present disclosure is applied to a digital measuring instrument 10 and a load device 20. The digital measuring instrument 10 is, for example, but not limited to, a handheld digital measuring instrument, a portable digital measuring instrument, or a mobile digital measuring instrument. The load device 20 is, for example, but not limited to, a car.

[0028] The digital measuring instrument 10 comprises a voltage detection circuit 102, a comparison unit 104, a display 106 and an analog / digital converter (in Fig. 2 (not shown). The load device 20 includes a motor 202 and a battery 204. The motor 202 may also be called an "engine starter motor" or "load starter motor." The battery 204 is, for example, but not limited to, a lead-acid battery or a battery can. The comparison unit 104 is, for example, but not limited to, a microprocessor or a comparator circuit.

[0029] The battery condition measurement procedure includes the following steps:

[0030] Step S102: The voltage detection circuit 102 of the digital measuring instrument 10 is connected to the motor 202 of the load device 20 and the battery 204 of the load device 20. Then, the battery condition measurement process proceeds to step S104 and step S106. More specifically, the voltage detection circuit 102 of the digital measuring instrument 10 includes a test rod for the positive terminal (in Fig. 2 not shown) and a test rod for the negative terminal (in Fig. 2 not shown). The battery 204 of the load device 20 includes a positive terminal (in Fig. 2 not shown) and a negative terminal (in Fig. 2 (not shown). The test rod for the positive terminal of the voltage detection circuit 102 is connected to the positive terminal of the battery 204. The test rod for the negative terminal of the voltage detection circuit 102 is connected to the negative terminal of the battery 204. The positive terminal and the negative terminal of the battery 204 are also connected to the motor 202 of the load device 20 to supply power to the motor 202.

[0031] Step S104: The battery 204 of the load device 20 supplies a starting voltage 206 to the motor 202 of the load device 20 to start the motor 202 of the load device 20, and at the same time, the battery state measuring process also executes step S106.

[0032] Step S106: The voltage detection circuit 102 of the digital measuring instrument 10 detects the starting voltage 206 to obtain a minimum starting voltage value 208. Then, the battery condition measurement process proceeds to step S108.

[0033] Specifically, the battery 204 of the load device 20 is fully charged to be detected by the voltage detection circuit 102 of the digital measuring instrument 10 before the battery condition measurement process performs steps S104 and S106. When the load device 20 is to be used, the load device 20 is started remotely or with a key from the static state, so that the battery 204 of the load device 20 supplies the starting voltage 206 to the motor 202 of the load device 20 to start the motor 202 of the load device 20. The process of starting the motor 202 of the load device 20 causes the voltage of the battery 204 of the load device 20 to suddenly drop and then rise; the minimum value of the dropped voltage is the minimum starting voltage value 208.The digital measuring instrument 10 can continuously detect the voltage within a period of time to indicate / record the lowest value of the voltage within the period of time.

[0034] Step S108: The voltage detection circuit 102 of the digital measuring instrument 10 sends the minimum starting voltage value 208 to the comparison unit 104 of the digital measuring instrument 10. Then, the battery condition measuring process proceeds to step S110.

[0035] Step S110: The comparison unit 104 of the digital measuring instrument 10 compares the minimum starting voltage value 208 and a starting voltage threshold value 210 to obtain a battery condition signal 212. Then, the battery condition measurement process proceeds to step S112. More specifically, the comparison unit 104 stores the starting voltage threshold value 210 in advance or a Fig. A memory (not shown in FIG. 2) prestores the starting voltage threshold 210 and sends the starting voltage threshold 210 to the comparison unit 104. If the load device 20 is the car with the 12-volt system, the starting voltage threshold 210 is 6 volts. If the load device 20 is the car with the 24-volt system, the starting voltage threshold 210 is 10 volts. If the minimum starting voltage value 208 is greater than or equal to the starting voltage threshold 210, the battery condition signal 212 is a normal signal, indicating that the battery 204 of the load device 20 is normal. If the minimum starting voltage value 208 is less than the starting voltage threshold 210, the battery condition signal 212 is an abnormal signal indicating that the battery 204 of the load device 20 is abnormal.

[0036] Step S112: The comparison unit 104 of the digital measuring instrument 10 sends the battery condition signal 212 to the display 106 of the digital measuring instrument 10. Then, the battery condition measuring process proceeds to step S114.

[0037] Step S114: The display 106 of the digital measuring instrument 10 displays the battery status signal 212.

[0038] Between step S112 and step S114, the comparison unit 104 of the digital measuring instrument 10 may also send the minimum starting voltage value 208 to the display 106 of the digital measuring instrument 10, so that in step S114, the display 106 of the digital measuring instrument 10 displays the battery state signal 212 and the minimum starting voltage value 208 simultaneously, or the display 106 of the digital measuring instrument 10 displays the battery state signal 212 and the minimum starting voltage value 208 alternately.

[0039] In addition, Fig. 3 is a schematic representation of a voltage range of the present disclosure. Fig. 2. The comparison unit 104 of the digital measuring instrument 10 also stores a first voltage value 214 (or the memory stores the first voltage value 214 and sends the first voltage value 214 to the comparison unit 104); the first voltage value 214 is greater than the starting voltage threshold 210; the comparison unit 104 of the digital measuring instrument 10 divides a voltage range 216 between the first voltage value 214 and the starting voltage threshold 210 into a plurality of voltage sub-ranges 218; the comparison unit 104 of the digital measuring instrument 10 determines in which of the voltage sub-ranges 218 the minimum starting voltage value 208 is located and generates the battery state signal 212 accordingly.

[0040] For example, the first voltage value 214 is 14 volts, the starting voltage threshold 210 is 6 volts, and the voltage range 216 includes three voltage sub-ranges 218, namely 14-10 volts, 10-8 volts, and 8-6 volts; when the minimum starting voltage value 208 is 12 volts (in 14-10 volts), the battery condition signal 212 is displayed as "excellent"; when the minimum starting voltage value 208 is 9 volts (in 10-8 volts), the battery condition signal 212 is displayed as "good"; when the minimum starting voltage value 208 is 7 volts (in 8-6 volts), the battery condition signal 212 is displayed as "caution"; when the minimum starting voltage value 208 is 5 volts (less than 6 volts), the battery condition signal 212 is displayed as "abnormal" or "poor".

[0041] Before the battery 204 of the load device 20 supplies the starting voltage 206 to the motor 202 of the load device 20 to start the motor 202 of the load device 20, the voltage detection circuit 102 of the digital measuring instrument 10 also detects a battery voltage 220 of the battery 204 of the load device 20 and informs the battery voltage 220 to the comparison unit 104 of the digital measuring instrument 10, so that the comparison unit 104 of the digital measuring instrument 10 determines the starting voltage threshold 210 based on the battery voltage 220.

[0042] For example, before the battery 204 of the load device 20 supplies the starting voltage 206 to the motor 202 of the load device 20 to start the motor 202 of the load device 20, the voltage detection circuit 102 of the digital measuring instrument 10 detects that the battery voltage 220 of the battery 204 of the load device 20 is 12 volts and notifies the comparison unit 104 of the digital measuring instrument 10 that the battery voltage 220 is 12 volts, so that the comparison unit 104 of the digital measuring instrument 10 determines from the battery voltage 220 that the starting voltage threshold 210 is 6 volts.

[0043] Before the battery 204 of the load device 20 supplies the starting voltage 206 to the motor 202 of the load device 20 to start the motor 202 of the load device 20, the voltage detection circuit 102 of the digital measuring instrument 10 also detects the battery voltage 220 of the battery 204 of the load device 20 and informs the comparison unit 104 of the digital measuring instrument 10 of the battery voltage 220, so that when the battery voltage 220 is less than a charging threshold value 222 (which is pre-stored in the comparison unit 104 of the digital measuring instrument 10; or the memory stores the charging threshold value 222 and sends the charging threshold value 222 to the comparison unit 104), the comparison unit 104 of the digital measuring instrument 10 controls the display 106 of the digital measuring instrument 10 to indicate that the battery 204 of the load device 20 must be loaded.Therefore, the battery 204 of the load device 20 is fully charged to be detected by the voltage detection circuit 102 of the digital measuring instrument 10.

[0044] It will also be repeated on Fig.2. The present disclosure also provides a digital measuring instrument 10 applied to a load device 20. The load device 20 includes a motor 202 and a battery 204. The digital measuring instrument 10 includes a voltage detection circuit 102, a comparison unit 104, and a display 106. The voltage detection circuit 102 is connected to the motor 202 and the battery 204. The comparison unit 104 is electrically connected to the voltage detection circuit 102. The display 106 is electrically connected to the comparison unit 104. The rest of the contents of the digital measuring instrument 10 of the present disclosure are the same as the contents of the above-mentioned battery condition measurement method of the present disclosure, so its description will not be repeated here for the sake of brevity.

[0045] Compared with the prior art battery life functional state measurement method, the present disclosure offers the following advantages: 1. The battery terminals do not need to be removed. The digital measuring instrument can be used directly for measurements. 2. The test condition is the functional state of the available battery used by the car under test, and its advantages are as follows: A. Cranking Amps (CA) is based on the car under test as the starting condition and is not simulated. B. The ambient temperature is based on the functional status of the car under test at that time; if the car and battery are tested in a cold zone, it will also confirm whether the car can be started properly with a cold cranking amps (CCA) at the low temperature. C. The detection speed is high; as long as the engine of the car under test is started, the functional status of the battery can be determined immediately.

[0046] The battery specifications can be found on the following website, so they are not repeated here: http: / / www.yuasa.com.tw / product-detail.php?lang=&nId=18

[0047] The battery characteristics can be found on the following website, so they are not repeated here: http: / / www.yuasa.com.tw / service_and_knowledge03.php?lang=

[0048] The advantage of the present disclosure is that the lifetime state of the battery 204 of the load device 20 is easy to measure.

[0049] Although the present disclosure has been described with reference to the embodiment thereof, it should be understood that the disclosure is not limited to the details thereof. Various substitutions and modifications have been suggested in the foregoing description, and others will occur to those skilled in the art. Therefore, all such substitutions and modifications are intended to be within the scope of the disclosure as defined in the appended claims. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited non-patent literature

[0000] http: / / www.yuasa.com.tw / product-detail.php?lang=&nId=18

[0046] http: / / www.yuasa.com.tw / service_and_knowledge03.php?lang=

[0047]

Claims

[1] A battery condition measuring method applied to a digital measuring instrument (10) and a load device (20), the digital measuring instrument (10) comprising a voltage detection circuit (102), a comparison unit (104) and a display (106), the load device (20) comprising a motor (202) and a battery (204), the battery condition measuring method comprising: Connecting to the motor (202) of the load device (20) and the battery (204) of the load device (20) through the voltage detection circuit (102) of the digital measuring instrument (10) (S102); Supplying a starting voltage (206) to the motor (202) of the load device (20) through the battery (204) of the load device (20) to start the motor (202) of the load device (20) (S104); Detecting the starting voltage (206) by the voltage detection circuit (102) of the digital measuring instrument (10) to obtain a minimum starting voltage value (208) (S106); Sending the minimum starting voltage value (208) to the comparison unit (104) of the digital measuring instrument (10) through the voltage detection circuit (102) of the digital measuring instrument (10) (S108); Comparing the minimum starting voltage value (208) and a starting voltage threshold value (210) by the comparison unit (104) of the digital measuring instrument (10) to obtain a battery state signal (212) (S110); Sending the battery status signal (212) to the display (106) of the digital measuring instrument (10) by the comparison unit (104) of the digital measuring instrument (10) (S112); and Displaying the battery status signal (212) through the display (106) of the digital measuring instrument (10) (S114). [2] The battery condition measuring method according to claim 1, further comprising sending the minimum starting voltage value (208) to the display (106) of the digital measuring instrument (10) by the comparison unit (104) of the digital measuring instrument (10). [3] The battery condition measuring method of claim 2, further comprising simultaneously displaying the battery condition signal (212) and the minimum starting voltage value (208) on the display (106) of the digital measuring instrument (10). [4] The battery condition measuring method according to claim 2, further comprising alternately displaying the battery condition signal (212) and the minimum starting voltage value (208) on the display (106) of the digital measuring instrument (10). [5] The battery condition measuring method according to claim 2, wherein the minimum starting voltage value (208) is greater than or equal to the starting voltage threshold value (210); the battery condition signal (212) is a normal signal indicating that the battery (204) of the load device (20) is normal. [6] The battery condition measuring method according to claim 2, wherein the minimum starting voltage value (208) is less than the starting voltage threshold value (210); the battery condition signal (212) is an abnormal signal indicating that the battery (204) of the load device (20) is abnormal. [7] The battery condition measuring method according to claim 2, wherein the load device (20) is a car using a 12-volt system; the starting voltage threshold (210) is 6 volts. [8] The battery condition measuring method according to claim 2, wherein the load device (20) is a car using a 24-volt system; the starting voltage threshold (210) is 10 volts. [9] The battery condition measuring method according to claim 2, wherein the digital measuring instrument (10) is a handheld digital measuring instrument; the comparison unit (104) is a microprocessor or a comparator circuit. [10] The battery condition measuring method according to claim 2, wherein the battery (204) of the load device (20) is fully charged to be detected by the voltage detection circuit (102) of the digital measuring instrument (10).

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