Internal humidity detection device for power battery pack

Abstract

The utility model discloses an internal humidity detection device for a power battery pack in the field of state monitoring of the power battery pack of an electric automobile, which comprises a humidity acquisition module, a Tbox module and a cloud platform module which are arranged in a power battery pack box body, the humidity acquisition module comprises a power conversion unit, a humidity acquisition unit, a data processing unit and a CAN communication unit; the data processing unit is electrically connected with the CAN communication unit through a wire, and the power supply conversion unit is electrically connected with the data processing unit, the humidity acquisition unit and the CAN communication unit. According to the internal humidity detection device for the power battery pack provided by the utility model, when the battery pack box body is damaged and the air tightness becomes poor, the internal humidity of the power battery pack box body is acquired in real time, and the humidity data is analyzed and pre-judged at the platform end, so that an alarm is given in time, and an operator overhauls a vehicle in time; therefore, greater loss caused by maintenance delay is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the power battery package state monitoring field of electric automobile, concretely is a kind of power battery package internal humidity detection device. BACKGROUND

[0002] The power battery package of electric automobile is the energy storage device of whole vehicle, voltage is usually above 300V, and the metal shell of battery package is usually electrically connected with the body of vehicle, and the body is called "ground". In order to ensure the safe operation of whole vehicle system, the high-voltage conducting part in battery package and "ground" must be electrically isolated, and the insulation resistance value should be infinite. When short circuit occurs between the high-voltage conducting part in battery package and "ground" or the insulation resistance value is too small, it is usually determined that the insulation resistance value is too low, and the vehicle will report an insulation resistance value too low fault, thereby affecting the normal operation of the vehicle. The too low insulation resistance value may even cause electric shock injury.

[0003] When the power battery package is shipped, the manufacturer will test the air tightness of the internal space of the battery package. Under normal circumstances, the air outside the battery package box body cannot enter the box body. If the power battery package shell is damaged by external force, and the high-voltage live parts such as battery cells, wiring harnesses, and electrical connection cards are not damaged, there may be no alarm or other prompt at the time of damage. However, as time goes by, when the moisture in the air enters the box through the damaged shell, it will cause the humidity inside the box to be too high. Under certain temperature impact, the water vapor in the high-humidity air will produce condensation and form water droplets. Water is a conductor, and when the condensed water droplets accumulate between the high-voltage live parts and the ground, the insulation resistance value between the high-voltage live parts and the ground becomes very small, triggering the vehicle to report an insulation resistance value too low fault. In severe cases, it may even cause secondary damage such as corrosion of internal connectors and circuit boards, and expand the loss.

[0004] Similarly, when some connectors and seals of the power battery package are damaged, causing poor air tightness, the humid air outside the box may also enter the box.

[0005] Currently, there is no good real-time automatic detection scheme for battery package box damage and poor air tightness.

[0006] Therefore, the skilled person in the art provides a power battery package internal humidity detection device to solve the problems raised in the background art. UTILITY MODEL CONTENTS

[0007] The utility model aims at providing a power battery package internal humidity detection device to solve the problems raised in the background art.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0009] The utility model provides a power battery package internal humidity detection device, including the humidity collection module, Tbox module and cloud platform module installed in the power battery package box body inside, the humidity collection module includes power conversion unit, humidity collection unit, data processing unit and CAN communication unit,

[0010] Data processing unit with CAN communication unit passes through the wire electrically connected, power conversion unit with data processing unit, humidity collection unit and CAN communication unit electrically connected, humidity collection unit with data processing unit electrically connected.

[0011] As the further scheme of the utility model: the humidity collection module is installed in the inside of power battery package, is used for real time collection humidity value in the box body, and the humidity collection module output is CAN communication, can install collection in the inside multiple point positions of power battery package, and the power supply of humidity collection module is in the inside of power battery package and obtains low voltage electricity of battery management system and can work.

[0012] As the further scheme of the utility model: the humidity collection module communicates with Tbox module through CAN communication, and real time sends humidity value in the inside of power battery package to Tbox module.

[0013] As the further scheme of the utility model: Tbox module is reported to cloud platform module in real time through wireless network humidity value in the inside of power battery package.

[0014] As the further scheme of the utility model: the power conversion unit in the inside of humidity collection module obtains low voltage power supply from the inside of power battery package, and the voltage required by humidity collection unit, data processing unit, CAN communication unit is converted into low voltage power supply to work each unit.

[0015] As the further scheme of the utility model: the humidity collection unit in the inside of humidity collection module includes a humidity sensor, can real time detection humidity in air, and humidity value is converted into electric signal and is output to data processing unit in real time.

[0016] As the further scheme of the utility model: the data processing unit in the inside of humidity collection module includes a single-chip microcomputer that supports CAN communication, when receiving humidity value that humidity collection unit transmits, data processing unit converts humidity value into the data that supports CAN communication and sends to CAN communication unit.

[0017] As the further scheme of the utility model: the CAN communication unit includes a CAN transceiver chip, and the CAN transceiver chip sends humidity value to Tbox module through the bus of CAN-H and CAN-L.

[0018] Compared with the prior art, the power battery pack internal humidity detection device has the advantages that

[0019] The utility model discloses a power battery pack internal humidity detection device, when the battery pack box body is damaged, the tightness is bad, through the humidity of power battery pack box body inside real -time collection to the humidity data of platform end is analyzed and is judged in advance, and timely alarm, and the operation personnel are handled in time to the vehicle and carry out the repair, thereby avoid the maintenance delay and cause greater loss. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is the structural schematic diagram of the utility model;

[0021] Fig. 2 It is the humidity collection module structure diagram in the utility model.

[0022] In the drawing: 1, power battery pack;2, Tbox module;3, cloud platform module;4, humidity collection module;401, data processing unit;402, humidity collection unit;403, power conversion unit;404, CAN communication unit. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Please refer to Figs. 1-2 In the embodiments of the utility model, a power battery pack internal humidity detection device includes humidity collection module 4, Tbox module 2 and cloud platform module 3 installed in the box body inside power battery pack 1, and humidity collection module 4 includes power conversion unit 403, humidity collection unit 402, data processing unit 401 and CAN communication unit 404.

[0025] Data processing unit 401 and CAN communication unit 404 are electrically connected through wire, power conversion unit 403 and data processing unit 401, humidity collection unit 402 and CAN communication unit 404 are electrically connected, and humidity collection unit 402 and data processing unit 401 are electrically connected.

[0026] The humidity collecting module 4 is installed in the inside of the power battery pack 1, and is used for collecting the humidity value in the box in real time. The output of the humidity collecting module 4 is CAN communication, and the humidity collecting module 4 can be installed and collected at multiple points in the inside of the power battery pack 1. The power supply of the humidity collecting module 4 can work by taking the low-voltage power of the battery management system in the inside of the power battery pack 1.

[0027] The humidity collecting module 4 communicates with the Tbox module 2 through CAN communication, and sends the humidity value in the inside of the power battery pack 1 to the Tbox module 2 in real time.

[0028] The Tbox module 2 reports the humidity value in the inside of the power battery pack 1 to the cloud platform module 3 in real time through a wireless network.

[0029] The power conversion unit 403 in the inside of the humidity collecting module 4 converts the low-voltage power obtained from the inside of the power battery pack 1 into the voltage required by the humidity collecting unit 402, the data processing unit 401 and the CAN communication unit 404, so that the units work.

[0030] The humidity collecting unit 402 in the inside of the humidity collecting module 4 includes a humidity sensor, which can detect the humidity in the air in real time, and convert the humidity value into an electrical signal and output to the data processing unit 401 in real time.

[0031] The data processing unit 401 in the inside of the humidity collecting module 4 includes a single-chip microcomputer supporting CAN communication. When receiving the humidity value transmitted by the humidity collecting unit 402, the data processing unit 401 converts the humidity value into data supporting CAN communication, and sends the data to the CAN communication unit 404.

[0032] The CAN communication unit 404 includes a CAN transceiver chip, which sends the humidity value to the Tbox module 2 through the CAN-H and CAN-L bus.

[0033] The working principle of the utility model is: power conversion unit 403 converts the input voltage into the voltage required by humidity acquisition unit 402, data processing unit 401 and CAN communication unit 404 for working, humidity acquisition unit 402 detects the humidity in the air in real time, and converts the humidity value into an electrical signal and outputs to data processing unit 401 in real time, data processing unit 401 receives the electrical signal from humidity acquisition unit 402, converts the humidity value into CAN communication data and sends to CAN communication unit 404, and CAN communication unit 404 sends the humidity value to Tbox module 2, Tbox module 2 receives the humidity value and reports to cloud platform module 3. Data analysis is carried out on the cloud platform module 3, when the humidity value has a large mutation, the battery pack box body is damaged, the air tightness is poor, and the alarm is given on the platform end, reminding the operator to check the power battery pack 1 of the vehicle, avoiding the influence of the vehicle caused by the high humidity and water droplets in the box body, also avoiding the corrosion of the connector and the circuit board caused by the condensed water droplets, and avoiding the expansion of the loss.

[0034] Humidity value collection and reporting principle:

[0035] After the vehicle starts, power conversion unit 403 obtains low-voltage power from the inside of power battery pack 1, and converts the low-voltage power into the voltage required by humidity acquisition unit 402, data processing unit 401 and CAN communication unit 404 for working; humidity acquisition unit 402 detects the humidity in the air in real time through the humidity sensor, and converts the humidity value into an electrical signal and outputs to data processing unit 401 in real time, data processing unit 401 converts the humidity value into data supporting CAN communication, and sends to CAN communication unit 404, CAN communication unit 404 sends the humidity value to Tbox module 2 through CAN transceiver chip, and Tbox module 2 reports the humidity value in power battery pack 1 to cloud platform module 3 in real time through wireless network.

[0036] Platform judgment principle:

[0037] After the platform receives the humidity value in power battery pack 1, data is saved, and the numerical value is arranged with time as the abscissa and humidity value as the ordinate, when the data is first received, the battery pack is considered to be in a new state, and the humidity value is also a normal value, and in the subsequent vehicle operation process, new humidity value data is arranged continuously, forming a humidity curve, when the humidity value presents a continuous abnormal increasing trend in the vehicle operation process, it is judged that the battery pack box body is damaged and the air tightness is poor, thereby triggering the alarm of the platform, the vehicle operator obtains the alarm information and timely repairs the vehicle, avoiding greater loss caused by delayed repair.

[0038] In the embodiment, the application provides a power battery pack internal humidity detection device.

[0039] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A power battery pack internal humidity detection device, comprising a humidity collection module (4) installed inside the box of the power battery pack (1), a Tbox module (2) and a cloud platform module (3), characterized in that: The humidity acquisition module (4) comprises a power conversion unit (403), a humidity acquisition unit (402), a data processing unit (401) and a CAN communication unit (404). The data processing unit (401) is electrically connected with the CAN communication unit (404) through a wire, the power conversion unit (403) is electrically connected with the data processing unit (401), the humidity acquisition unit (402) and the CAN communication unit (404), and the humidity acquisition unit (402) is electrically connected with the data processing unit (401).

2. The power battery pack internal humidity detection device according to claim 1, characterized in that: The humidity acquisition module (4) is installed in the interior of the power battery pack (1) and is used for acquiring the humidity value in the interior of the box body in real time.

3. The power battery pack internal humidity detection device according to claim 1, characterized in that: The humidity acquisition module (4) is communicated with the Tbox module (2) through CAN communication and sends the humidity value in the interior of the power battery pack (1) to the Tbox module (2) in real time.

4. The power battery pack internal humidity detection device according to claim 1, characterized in that: The Tbox module (2) reports the humidity value in the interior of the power battery pack (1) to the cloud platform module (3) in real time through a wireless network.

5. The power battery pack internal humidity detection device according to claim 1, characterized in that: The power conversion unit (403) in the humidity acquisition module (4) converts the low-voltage power into the voltage required by the humidity acquisition unit (402), the data processing unit (401) and the CAN communication unit (404) after obtaining the low-voltage power from the interior of the power battery pack (1) and supplies the voltage to each unit to work.

6. The power battery pack internal humidity detection device according to claim 1, characterized in that: The humidity acquisition unit (402) in the humidity acquisition module (4) comprises a humidity sensor, can detect the humidity in the air in real time, converts the humidity value into an electric signal and outputs the electric signal to the data processing unit (401) in real time.

7. The power battery pack internal humidity detection device according to claim 1, characterized in that: The data processing unit (401) in the humidity acquisition module (4) comprises a single-chip microcomputer supporting CAN communication, converts the humidity value into data supporting CAN communication when receiving the humidity value transmitted by the humidity acquisition unit (402) and sends the data to the CAN communication unit (404).

8. The power battery pack internal humidity detection device according to claim 1, characterized in that: The CAN communication unit (404) comprises a CAN transceiver chip, and the CAN transceiver chip sends the humidity value to the Tbox module (2) through the CAN-H and CAN-L buses.

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