CN204290286U - A protection device for automobile lithium battery pack - Google Patents

Abstract

The utility model proposes a protective device for a lithium battery pack of an automobile, wherein the lithium battery pack is provided with positive and negative output terminals, and the protective device is characterized in that it comprises a processor, a sensor module, and an output switch connected in series to the positive output terminal of the battery pack, and the processor controls the on-off of the output switch according to the working status signal of the lithium battery pack fed back by the sensor module. The utility model monitors the lithium battery pack in real time, and implements timely early warning and processing of faults, thereby ensuring the safety of the battery pack and the storage space of the battery pack; compared with manual detection methods, the detection accuracy is higher, the monitoring is more comprehensive, and the feedback is more timely.

Description

A car lithium battery pack protection device

technical field

The utility model relates to a protection device for an automobile lithium battery pack.

Background technique

Large-scale lithium battery packs will generate more heat when they are overloaded, and there are potential safety hazards of fire or even explosion when they are overloaded for a long time. At present, the maintenance of large lithium battery packs is generally carried out through manual regular inspection, and the influence of the surrounding environment of the battery pack is rarely considered. There are inherent defects in this method: 1. The time interval of manual detection is long and the detection accuracy is low, so it is difficult to find the faults and hidden dangers of the battery pack and its circuit, especially when testing a large number of lithium battery packs; 2. The working status parameters of the lithium battery pack cannot be fed back in real time, and the failure can not be warned or dealt with in time; 3. The influence of the surrounding environment of the battery pack is ignored, and the safety hazards caused by light and temperature to the battery pack are not foreseen.

Utility model content

The utility model proposes an automobile lithium battery group protection device, which provides real-time monitoring and power-off protection for the lithium battery group, and ensures the safety of the battery group and the storage space of the battery group. Its technical scheme is as follows:

A lithium battery pack protection device for automobiles, the lithium battery pack is provided with positive and negative output terminals, the protection device is characterized in that it includes a processor, a sensing module and an output switch connected in series to the positive output terminal of the battery pack, the The processor controls the on-off of the output switch according to the working state signal of the lithium battery pack fed back by the sensing module; the sensing module includes one or more of a light sensor, a temperature sensor, and a smoke detector; the light sensor uses To obtain the illuminance of the lithium battery pack from the outside; the temperature sensor is used to detect the temperature value of the lithium battery pack and its surroundings; the smoke detector is used to detect the smoke of the lithium battery pack and its surroundings.

The processor presets a certain light value as an alarm threshold, and when the real-time light intensity of the lithium battery pack exceeds this value, an alarm is issued to remind the staff to deal with the abnormality; similarly, a temperature alarm threshold is also preset. When the smoke detector detects the smoke caused by ignition, the processor will alarm or generate other control signals according to actual design requirements.

The above scheme can monitor the lithium battery pack in real time, taking into account the impact of the surrounding environment on the battery pack and detecting the phenomenon of overheating and ignition of the battery pack, so as to realize timely early warning and treatment of faults, and ensure the balance between the battery pack and the storage space of the battery pack. Safety. Compared with the manual detection method, its detection accuracy is higher, the monitoring is more comprehensive, and the feedback is more timely.

Preferably, the protection device is also provided with a fire extinguishing controller, which is used to drive the fire extinguishing device to extinguish the fire in response to the control request of the processor. The processor judges whether a fire alarm occurs according to the data fed back by the temperature sensor and the smoke detector, and then performs an alarm or fire extinguishing operation.

The above scheme is linked with the fire extinguishing system, which can minimize the loss caused by the failure.

Preferably, the processor is also provided with a data output terminal for outputting preset alarm signals, real-time state parameters of the battery pack or other parameters acquired by the sensing module.

The above solution can obtain the data of the data output terminal through PDA, PC, etc., and provide data support for monitoring, statistics, and alarm. Through the data, the staff can quickly and effectively carry out early warning and treatment of potential failures, reduce their impact on the battery pack, and truly protect the battery pack, not just emergency treatment of faults.

Preferably, the output switch includes an electromagnetic relay, the switch path of the electromagnetic relay is connected in series with the positive output end of the battery pack, and the electromagnetic path is connected with the processor.

Preferably, the output switch includes a transistor, the transistor is connected in series with the output switch at the positive output end of the battery pack, and its gate is connected to the processor.

Preferably, the protection device further includes an opening and closing sensor, the opening and closing sensor is arranged at the lid of the box where the lithium battery pack is located, and is used to detect the opening or closing of the battery box and feed back to the processor.

Advantage and beneficial effect of the present utility model are:

1. Realize high-precision, comprehensive monitoring, and timely feedback on the working status of the battery pack, effectively reducing the occurrence of accidents and improving the efficiency of responding to failures.

2. Taking into account the impact of the surrounding environment on the battery pack, it is possible to quickly and effectively carry out early warning and treatment of potential failures.

3. Linkage with the fire extinguishing system can minimize the loss caused by failure.

4. There is a data output terminal, and its data can be applied to other monitoring or control systems, which is convenient for system networking or system linkage adjustment.

Description of drawings

Fig. 1 is the structural framework schematic diagram of the present utility model.

FIG. 2 is a first schematic diagram of the output switch circuit of the present invention.

FIG. 3 is the second schematic diagram of the output switch circuit of the present invention.

Detailed ways

The scheme of this application is further described in conjunction with the accompanying drawings as follows:

As shown in FIG. 1 , a lithium battery pack protection device for automobiles, the lithium battery pack 10 is provided with positive and negative output terminals, and the protection device includes a processor 1, a sensing module 2 and a positive output terminal connected in series to the battery pack 10. The output switch 3 at the output end, the processor 1 controls the on-off of the output switch 3 according to the working status signal of the lithium battery pack 10 fed back by the sensor module 2 .

The above scheme can monitor the lithium battery pack in real time, and realize timely early warning and processing of faults, so as to ensure the safety of the battery pack and the storage space of the battery pack; compared with the manual detection method, the detection accuracy is higher, the monitoring is more comprehensive, Feedback is more timely.

The sensing module 2 includes a smoke detector 21, a light sensor 22, a temperature sensor 23 and an opening and closing sensor 24;

The smoke detector 21 is used to detect the car battery and surrounding smoke;

The light sensor 22 is used to obtain the illuminance of the lithium battery pack from the outside world;

The temperature sensor 23 is used to detect the temperature value of the lithium battery pack and its surroundings;

The opening and closing sensor 24 is located at the lid of the box where the lithium battery pack is located, and is used to detect the opening or closing of the battery box and feed back to the processor 1 .

The protection device is also provided with a fire extinguishing controller 4 for driving the fire extinguishing device to extinguish the fire in response to the control request of the processor 1 . The fire extinguishing controller 4 is linked with the fire extinguishing system, which can minimize the loss caused by the failure.

The processor 1 is also provided with a data output terminal DATA for outputting preset alarm signals, real-time state parameters of the battery pack or other parameters obtained by the sensor module.

The above solution can obtain the data of the data output terminal through PDA, PC, etc., and provide data support for monitoring, statistics, and alarm.

As shown in FIG. 2 , the output switch 3 includes an electromagnetic relay, the switching path of the electromagnetic relay is connected in series with the positive output end of the battery pack, and the electromagnetic path is connected with the processor.

As shown in FIG. 3 , the output switch 3 includes a transistor, which is connected in series with the output switch at the positive output end of the battery pack, and whose gate is connected to the processor.

The above-mentioned preferred implementation mode should be regarded as an illustration of the implementation mode of the scheme of this application, and any technical deduction, replacement, improvement, etc. that are similar to, similar to, or based on the scheme of this application should be regarded as the scope of protection of this patent.

Claims (6)

1. an automobile lithium battery group protective device, described lithium battery group is provided with positive and negative output, the feature of described protective device is: comprise processor, sensing module and be serially connected with the output switch of battery pack positive output end, and described processor controls the break-make of output switch according to the lithium battery group working state signal that sensing module feeds back; It is one or more that described sensing module comprises in optical sensor, temperature sensor, smoke detector; Described optical sensor, in order to obtain the illuminance of outer bound pair lithium battery group; Described temperature sensor, in order to detect lithium battery group and Temperature numerical around; Described smoke detector, in order to detect lithium battery group and smog around.

2. a kind of automobile lithium battery group protective device according to claim 1, is characterized in that: be also provided with Fire extinguisher, puts out a fire to drive extinguishing device in order to the control request responding described processor.

3. a kind of automobile lithium battery group protective device according to claim 2, is characterized in that: described processor is also provided with a data output end, in order to export default alarm signal, the real-time status parameter of battery pack or other parameter obtained by sensing module.

4. a kind of automobile lithium battery group protective device according to claim 3, it is characterized in that: described output switch comprises an electromagnetic relay, the switch ways of described electromagnetic relay is serially connected with battery pack positive output end, and electromagnetic path is connected with processor.

5. a kind of automobile lithium battery group protective device according to claim 3, it is characterized in that: described output switch comprises a transistor, described strings of transistors is connected to the output switch of battery pack positive output end, and its grid is connected with processor.

6. a kind of automobile lithium battery group protective device according to claim 4 or 5; it is characterized in that: also comprise folding transducer; what lithium battery group place casing was located at by described folding transducer covers place, in order to monitoring cell case opening or closed, and feed back to described processor.