CN213398864U - A reserve NiMH battery health detection system for TBOX - Google Patents
A reserve NiMH battery health detection system for TBOX Download PDFInfo
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- CN213398864U CN213398864U CN202021528548.0U CN202021528548U CN213398864U CN 213398864 U CN213398864 U CN 213398864U CN 202021528548 U CN202021528548 U CN 202021528548U CN 213398864 U CN213398864 U CN 213398864U
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Abstract
A backup NiMH battery health detection system for TBOX comprising: the low-current discharge network, the large-current discharge network and the battery voltage detection unit are mutually connected in parallel and are connected into the spare NiMH battery, the current values I1 and I2 of the spare NiMH battery during twice discharging are respectively obtained through the low-current discharge network and the large-current discharge network, and meanwhile, the battery voltage detection unit detects the voltage values U1 and U2 of the spare NiMH battery during twice discharging; the processing unit is used for sending the voltage value and the current value data to the processing unit, and obtaining the internal resistance of the battery detected this time; and when the internal resistance detection is carried out for n times and the internal resistance of the battery is larger than the preset value for m times, the processing unit judges that the spare NiMH battery is unhealthy. The utility model discloses a whether it is healthy to detect the battery internal resistance and judge the battery, have advantages such as the principle is simple, low cost, guarantee that reserve NiMH battery can both normally supply power at any time.
Description
Technical Field
The utility model relates to a battery health detection system.
Background
With the use of the internet of vehicles in automobiles, TBOX devices have become increasingly important in the automotive industry. The TBOX is connected with the cloud TSP, the automobile CAN bus is connected with the lower part of the TBOX, a control command CAN be directly sent through a mobile phone to control operations such as opening and closing of a window, the running data of an automobile CAN be uploaded to the mobile phone, automobile love information CAN be known at any time, and the quality of the TBOX becomes the core of the Internet of vehicles.
When the accident happens, the storage battery is likely to fall off, the normal power supply cannot be realized, the connection with the outside world through the Internet of vehicles cannot be realized, and at the moment, the spare NiMH battery applied to the TBOX can supply power to the vehicle for accident alarm processing when the storage battery falls off. At this time, the battery health of the spare NiMH battery is important to meet the communication requirements, and reliable electric quantity can be provided at any time.
The current spare NiMH batteries are all required to provide 15 minutes of power supply, but the batteries may be lost in equipment for a long time, the duration of the power maintenance is not properly managed, and the 15 minutes of power supply is difficult to guarantee in case of emergency; or the spare NiMH battery has a function loss condition once it fails, and the battery manufacturer has no corresponding technology for detecting the health of the battery. Therefore, aiming at the technical problems, the system uses different discharge networks to discharge, calculates the internal resistance of the standby NiMH battery, and then manages the health of the battery by judging the internal resistance of the battery so as to meet the normal and safe use of the vehicle.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome above-mentioned prior art not enough, provide a reserve NiMH battery health detection system for TBOX.
The utility model provides a technical scheme that above-mentioned technical problem adopted is: a backup NiMH battery health detection system for TBOX comprising:
a spare NiMH battery is arranged on the battery,
a low-current discharge network, a high-current discharge network and a battery voltage detection unit which are mutually connected in parallel and are connected into the spare NiMH battery,
the control unit is used for respectively controlling the on-off states of the small-current discharge network and the large-current discharge network, respectively obtaining current values I1 and I2 of the standby NiMH battery when the standby NiMH battery is discharged twice through the small-current discharge network and the large-current discharge network, and simultaneously, the battery voltage detection unit is used for measuring voltage values U1 and U2 of the standby NiMH battery when the standby NiMH battery is discharged twice;
the processing unit is connected with the battery voltage detection unit and the control unit, the voltage value and the current value data are sent to the processing unit, and the processing unit obtains the internal resistance of the battery detected this time; when the internal resistance detection is carried out for n times, and the internal resistance of the battery is larger than a preset value for m times, wherein m is larger than or equal to n/2, the processing unit judges that the standby NiMH battery is unhealthy, and a battery unhealthy event is formed; otherwise, judging the health of the spare NiMH battery.
The system further comprises: and the communication unit is connected with the processing unit, and after the battery unhealthy event is formed, the processing unit controls the communication unit to send information to the background unit, and the background unit contacts a vehicle owner to replace the spare NiMH battery.
The communication unit is a 4G or 5G network module.
The background unit is a background service system of the automobile factory.
The system further comprises: the first switch and the second switch are respectively connected with the control unit, the first switch controls the on-off of the low-current discharge network to realize one discharge process, and the second switch controls the on-off of the high-current discharge network to realize the other discharge process.
The first switch and the second switch are switch circuits which are built through MOS tubes and triodes and can control the on and off of a power supply.
The high-current discharge network is a circuit formed by connecting one end of a high-power resistor R2 with a spare NiMH battery and grounding the other end.
The low-current discharge network is a circuit formed by connecting one end of a high-power resistor R1 with a spare NiMH battery and grounding the other end.
The battery voltage detection unit acquires a voltage signal in a resistance voltage division mode.
The control unit and the processing unit are integrated in an MCU microcontroller.
Compared with the prior art, the beneficial effects of the utility model are that: in order to ensure the normal operation of the functions of the whole vehicle in the whole using process, the standby battery needs to be managed, the standby NiMH battery used in the standby battery needs to provide 15 minutes of power supply in the emergency situation of the vehicle, and at the moment, if the battery has problems, the power supply is difficult to maintain, so that the health detection of the standby NiMH battery is needed.
The utility model discloses a whether it is healthy to detect the battery to the resistance size of battery internal resistance, utilizes ohm's law to calculate the voltage that changes and obtain the battery internal resistance with the electric current ratio that corresponds the change, and voltage, the electric current of change are set for through the network that discharges of difference. The method has the advantages of simple principle, low cost and the like, eliminates the potential health hazard existing in the long-time placing process of the spare NiMH battery, and ensures that the equipment can normally supply power when being switched into the spare NiMH battery at any time.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced, wherein:
FIG. 1 is a system block diagram of a preferred embodiment of the present invention;
fig. 2 is a schematic circuit diagram of the first switch and the small current amplifying network according to the preferred embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a second switch and a high current amplification network according to a preferred embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a battery voltage detection unit according to a preferred embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description. In the preferred embodiments, the terms "upper", "lower", "left", "right", "middle" and "a" are used for the sake of clarity only, and are not intended to limit the scope of the invention, its relative relationship between the terms and their derivatives, and the scope of the invention should be understood as being limited by the claims.
Referring to fig. 1 to 4, a system for health detection of a backup NiMH battery for TBOX according to a preferred embodiment of the present invention mainly includes: the system comprises a standby NiMH battery, a low-current discharge network, a high-current discharge network, a battery voltage detection unit, a control unit and a processing unit, wherein the low-current discharge network, the high-current discharge network and the battery voltage detection unit are mutually connected in parallel and are connected into the standby NiMH battery, the control unit respectively controls the on-off states of the low-current discharge network and the high-current discharge network, and the processing unit is connected with the battery voltage detection unit and the control unit. Respectively obtaining current values I1 and I2 of the spare NiMH battery during twice discharging through a small current discharge network and a large current discharge network, simultaneously measuring voltage values U1 and U2 of the spare NiMH battery during twice discharging by a battery voltage detection unit, sending the voltage value and the current value data to a processing unit, calculating the internal resistance of the battery detected at this time by the processing unit through ohm's law, and judging the health of the spare NiMH battery by the processing unit when the internal resistance of the battery is smaller than a preset value; and when the internal resistance detection is carried out for 10 times and the internal resistance of the battery is larger than the preset value for more than 8 times, judging that the standby NiMH battery is unhealthy and forming a battery unhealthy event.
The system further comprises: the communication unit is connected with the processing unit, when the battery unhealthy event is formed, the processing unit controls the communication unit to send unhealthy information to the background unit, the background unit receives the information and then replaces the spare NiMH battery with the vehicle owner, and the vehicle owner can be notified in a calling and short message mode. The background unit specifically refers to a background service system of a car factory, and manages TBOX equipment through data uploaded by the communication unit.
The system further comprises: the first switch 1 and the second switch 2 are respectively connected with the control unit, the first switch 1 corresponds to a low-current discharge network and controls on-off to realize a first discharge process, and the second switch 2 corresponds to a high-current discharge network and controls on-off to realize a second discharge process.
The first switch 1 and the second switch 2 are both switch circuits which are built through MOS tubes and triodes and can control the on and off of a power supply.
The low current discharge network is a circuit composed of a high power resistor R1 with one end connected with a spare NiMH battery and the other end grounded.
The large current discharge network is a circuit composed of a high-power resistor R2 with one end connected with a spare NiMH battery and the other end grounded.
The battery voltage detection unit acquires a voltage signal in a resistance voltage division mode.
The communication unit specifically is 4G network module, 5G network module etc. as long as can realize that data communication's network module all can be used to the utility model discloses.
The control unit and the processing unit may be integrated into one MCU microcontroller.
For the convenience of understanding the scheme, the working principle of the system is briefly described:
the first time is executed, the control unit conducts the first switch 1, the standby NiMH battery is discharged at the timing of 10s by using a low-current discharge network, the discharge current is I1, and the battery voltage detection unit acquires the battery voltages U1, I1 and U1 and sends the battery voltages U1, I1 and U1 to the processing unit; wherein, I1 is U1/R1, R1 is a high-power resistor R1 of a low-current discharge network;
the second time is executed, the control unit conducts the second switch 2, the standby NiMH battery is discharged at regular time for 3s by using a large-current discharge network, the discharge current is I2, and battery voltages U2, I2 and U2 are obtained through the battery voltage detection unit and are sent to the processing unit; wherein, I2 is U2/R2, R2 is a high-power resistor R2 of a high-current discharge network;
the processing unit calculates by ohm's law: obtaining the internal resistance of the battery at this time, wherein the internal resistance of the battery is (U1-U2)/(I2-I1);
the processing unit judges the calculated internal resistance of the battery, and when the internal resistance of the battery is less than 1 omega, the health of the standby NiMH battery is judged; when the internal resistance detection is carried out for 10 times and the internal resistance of the battery is more than 1 omega for more than 8 times, judging that the standby NiMH battery is unhealthy and forming a battery unhealthy event;
then the communication unit sends the battery unhealthy event information to the background unit, and the background unit receives the information and then replaces the spare NiMH battery with the vehicle owner.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any person skilled in the art can make any indirect modifications, equivalent changes and modifications to the above embodiments according to the technical spirit of the present invention without departing from the scope of the present invention, and still fall within the scope of the technical solution of the present invention.
Claims (10)
1. A backup NiMH battery health detection system for TBOX, comprising:
a spare NiMH battery is arranged on the battery,
a low-current discharge network, a high-current discharge network and a battery voltage detection unit which are mutually connected in parallel and are connected into the spare NiMH battery,
the control unit is used for respectively controlling the on-off states of the small-current discharge network and the large-current discharge network, respectively obtaining current values I1 and I2 of the standby NiMH battery when the standby NiMH battery is discharged twice through the small-current discharge network and the large-current discharge network, and simultaneously, the battery voltage detection unit is used for measuring voltage values U1 and U2 of the standby NiMH battery when the standby NiMH battery is discharged twice;
the processing unit is connected with the battery voltage detection unit and the control unit, the voltage value and the current value data are sent to the processing unit, and the processing unit obtains the internal resistance of the battery detected this time; when the internal resistance detection is carried out for n times, and the internal resistance of the battery is larger than a preset value for m times, wherein m is larger than or equal to n/2, the processing unit judges that the standby NiMH battery is unhealthy, and a battery unhealthy event is formed; otherwise, judging the health of the spare NiMH battery.
2. The backup NiMH battery health detection system for TBOX of claim 1, further comprising: and the communication unit is connected with the processing unit, and after the battery unhealthy event is formed, the processing unit controls the communication unit to send information to the background unit, and the background unit contacts a vehicle owner to replace the spare NiMH battery.
3. The backup NiMH battery health detection system for TBOX according to claim 2, characterized in that the communication unit is a 4G or 5G network module.
4. The backup NiMH battery health detection system for TBOX according to claim 2, characterized in that the back office unit is a car yard back office service system.
5. The backup NiMH battery health detection system for TBOX of claim 1, further comprising: the first switch (1) and the second switch (2) are respectively connected with the control unit, the first switch (1) is corresponding to the low-current discharge network to control on-off to realize one discharge process, and the second switch (2) is corresponding to the high-current discharge network to control on-off to realize another discharge process.
6. The health detection system for the standby NiMH battery for TBOX according to claim 5, characterized in that the first switch (1) and the second switch (2) are switch circuits which are built through MOS (metal oxide semiconductor) tubes and triodes and can control the on and off of a power supply.
7. The backup NiMH battery health detection system for TBOX according to any of claims 1 to 6, characterized in that the high current discharge network is a circuit consisting of a high power resistor R2 connected to the backup NiMH battery at one end and to ground at the other end.
8. The backup NiMH battery health detection system for TBOX according to any of claims 1 to 6, characterized by that, the low current discharge network is a circuit composed of a high power resistor R1 connected to the backup NiMH battery at one end and to ground at the other end.
9. The backup NiMH battery health detection system for TBOX according to any of claims 1 to 6, wherein the battery voltage detection unit acquires a voltage signal in a resistance voltage division manner.
10. A backup NiMH battery health detection system for TBOX as recited in any one of claims 1 to 6, wherein said control unit and processing unit are integrated into one MCU microcontroller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021528548.0U CN213398864U (en) | 2020-07-28 | 2020-07-28 | A reserve NiMH battery health detection system for TBOX |
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| CN202021528548.0U CN213398864U (en) | 2020-07-28 | 2020-07-28 | A reserve NiMH battery health detection system for TBOX |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113702853A (en) * | 2021-07-14 | 2021-11-26 | 深圳市有为信息技术发展有限公司 | Vehicle-mounted battery health condition detection device and detection method thereof |
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- 2020-07-28 CN CN202021528548.0U patent/CN213398864U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113702853A (en) * | 2021-07-14 | 2021-11-26 | 深圳市有为信息技术发展有限公司 | Vehicle-mounted battery health condition detection device and detection method thereof |
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Effective date of registration: 20220907 Address after: Room JT5510, Building 2, No. 3131, Jinshajiang Road, Zhenxin Street, Jiading District, Shanghai, 200000 Patentee after: Shanghai Auto Union World Information Technology Co.,Ltd. Address before: 518000 2nd floor, building B, phase I, gaoxinxin science and Technology Industrial Park, Liuxian 1st Road, 67 District, Xin'an street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN AUTOLINK INFORMATION TECHNOLOGY Co.,Ltd. |
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