CN219497983U

CN219497983U - Collision protection and detection device for power battery pack of electric automobile

Info

Publication number: CN219497983U
Application number: CN202320501079.0U
Authority: CN
Inventors: 王泽龙; 李美
Original assignee: Hainan University
Current assignee: Hainan University
Priority date: 2023-03-15
Filing date: 2023-03-15
Publication date: 2023-08-08
Anticipated expiration: 2033-03-15

Abstract

The utility model discloses a collision protection and detection device for an electric vehicle power battery pack, which comprises: the battery module, foam aluminum, inlayer bottom plate, eddy current sensor, ACF limit buffer material, casing under the battery package, RFID sensor under inlayer bottom plate and the battery package casing weld together, inside ACF limit buffer material of adding constitutes double-deck bottom plate protective structure, eddy current sensor utilizes the magnetic field to carry out nondestructive test to bottom protective structure, real-time supervision bottom structure's impaired condition, RFID sensor receives eddy current sensor signal to the impaired condition of bottom structure is judged to the discernment signal.

Description

Collision protection and detection device for power battery pack of electric automobile

Technical Field

The utility model relates to the technology of power batteries of electric automobiles, in particular to a battery pack collision protection structure and a detection device.

Background

With the continuous development of new energy technology, the popularization rate of new energy electric vehicles is increased year by year, and safety accidents of electric vehicle power battery packs are frequent. The electric automobile power battery package is installed in automobile body below, and power battery package bottom is little from the ground clearance, receives external force collision or cuts and rubs easily in the driving and makes the battery impaired, and generally the impaired being difficult for by the driver of bottom, impaired long-term accumulation extremely easily causes battery thermal runaway, is unfavorable for the security of car.

The patent in China (bulletin No. CN215008349U; bulletin day 2021-12-03) discloses a battery pack collision detection device, a battery pack and a vehicle, wherein the battery pack collision detection device is arranged in a shell of the battery pack, a battery module is arranged in the shell, the battery pack collision detection device comprises a film pressure sensor arranged between the bottom of the battery module and the shell, and the film pressure sensor is used for detecting collision pressure information of the bottom of the battery pack. According to the power battery pack collision detection device, the collision of the bottom of the battery pack can be detected through the film pressure sensor arranged between the bottom of the battery module and the shell, so that the occurrence of the battery pack collision problem can be recognized in time, and the power battery pack collision detection device has a good use effect.

The battery pack collision detection device in the above patent document has a good effect on bottom collision detection, but does not make good protection against a slight collision, and low-level collision alarms which are continuously repeated many times cause an increase in the maintenance cost of the automobile.

Disclosure of Invention

The utility model aims to provide a collision protection and detection device for an electric automobile power battery pack, which can effectively improve the shock resistance of the bottom of the battery pack and detect the damage condition of a bottom protection structure.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows: an electric automobile power battery package collision protection and detection device, includes: through adopting the scheme, the battery pack bottom shock resistance can be effectively improved, the bottom protection structure is detected to be damaged, and the risk of thermal runaway of the battery is judged.

Further, the inner layer bottom plate is welded with the battery pack lower shell together, ACF limit buffer materials are added in the inner layer bottom plate to form a double-layer bottom plate protection structure, impact can be effectively buffered by adopting the scheme, damage to the battery is reduced, and the service life of the battery is prolonged.

Furthermore, the eddy current sensor utilizes the magnetic field to carry out nondestructive test to the bottom protective structure, and the impaired condition of real-time supervision bottom structure through adopting above-mentioned scheme, can detect bottom structure under the condition of not dismantling bottom structure.

Further, the RFID sensor receives the signal of the eddy current sensor and recognizes the signal to judge the damage condition of the bottom structure, and by adopting the scheme, the damage condition of the bottom can be effectively judged according to the received signal.

Further, foam aluminum is paved above the inner layer bottom plate, and by adopting the scheme, the interference of an electromagnetic field can be effectively isolated.

Further, the eddy current sensor is arranged between the inner layer bottom plate and the foamed aluminum, and the eddy current sensor is arranged between the foamed aluminum and the inner layer bottom plate.

Compared with the prior art, the utility model has the following advantages: the double-layer bottom plate structure and the internal buffer substance can effectively improve the shock resistance of the bottom of the battery pack, the ACF limit buffer material of the internal buffer substance has good energy absorption buffer effect, can play a good role in protecting tiny collision, prolongs the service life of the battery, and can detect different positions of the bottom of the battery pack by arranging the eddy current sensor in the lower shell so as to identify the specific position and damage degree of the collision.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

Fig. 1 is a schematic structural diagram of an electric vehicle power battery pack collision protection and detection device according to an embodiment of the utility model.

Fig. 2 is a schematic diagram of a location of an RFID sensor according to an embodiment of the present utility model.

FIG. 3 is a schematic view of a sensor mounting location.

Fig. 4 is a schematic diagram of the workflow of the present utility model.

1. A battery module; 2. foamed aluminum; 3. an inner layer bottom plate; 4. an eddy current sensor; 5. ACF limit buffer material; 6. a battery pack lower case; 7. an RFID sensor.

Detailed Description

It should be noted that, without conflict, features in the embodiments of the present utility model may be combined with each other.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "front", "rear", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the present utility model, unless explicitly specified and limited otherwise, the terms "linked," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or a combination thereof; can be mechanically or electrically connected; either directly or indirectly, through an intermediate medium, may be in communication with each other between two elements or in an interaction relationship between the two elements, unless explicitly defined otherwise.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

An electric automobile power battery package collision protection and detection device, includes: the battery module 1, foam aluminum 2, an inner bottom plate 3, an eddy current sensor 4, an ACF limit buffer material 5, a battery pack lower shell 6 and an RFID sensor 7.

The inner bottom plate 3 and the battery pack lower shell 6 are welded together, an ACF limit buffer material 5 is added in the inner part to form a double-layer bottom plate protection structure, and the structure can effectively defend and buffer impact when the bottom of the battery pack is impacted.

The eddy current sensor 4 is located at four corners of the inner bottom plate 3, and is used for carrying out nondestructive testing on the bottom protection structure by utilizing a magnetic field, so as to monitor the damage condition of the bottom structure in real time.

The foam aluminum 2 is located between the battery module 1 and the inner bottom plate 3, when the inner bottom plate 3 is impacted to deform or break down, the foam aluminum 2 still plays a certain role in buffering and damping to protect the battery pack 1 from being damaged, and secondly, the foam aluminum 2 can isolate the interference of electromagnetic fields to enable the electric vortex sensor 4 to operate normally without being influenced by the environment.

The specific installation position of the RFID sensor 7 at the sealing cover of the lower shell bottom 6 of the battery pack is shown in fig. 3, and the RFID sensor receives the signal of the eddy current sensor 4 and recognizes the signal to judge the damage condition of the bottom structure.

When the electric eddy current sensor works, alternating current is conducted to the exciting coil in the electric eddy current sensor 4 to generate an alternating electromagnetic field, so that eddy currents are generated by the double-layer bottom plate of the battery pack, the induction magnetic field generated by the eddy currents can enable the induction coil in the electric eddy current sensor 4 to generate induction currents, the circulation path of the eddy currents can be changed due to structural damage of the double-layer bottom plate, the generated magnetic field is changed, and different voltage signals are output by the electric eddy current sensor 4.

The generated voltage signals are transmitted to the RFID sensor 7 by the electric vortex sensor 4, the RFID sensor 7 is used for identifying and comparing the received voltage signals, judging whether the damage of the bottom structure reaches a battery thermal runaway threshold value, if the damage of the bottom structure reaches the battery thermal runaway threshold value, giving an early warning to remind a driver to overhaul the vehicle in time, and if the damage of the bottom structure does not reach the threshold value, the double-layer structure of the lower shell bottom 6 of the battery pack is used for successfully buffering the impact.

The foregoing description of the preferred embodiment of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. The utility model provides an electric automobile power battery package collision protection and detection device which characterized in that includes: battery module (1), foam aluminum (2), inlayer bottom plate (3), electric vortex sensor (4), ACF limit buffer material (5), casing (6), RFID sensor (7) under the battery package, casing (6) welding together under inlayer bottom plate (3) and the battery package, inside ACF limit buffer material (5) of adding constitutes double-deck bottom plate protective structure, electric vortex sensor (4) utilize the magnetic field to carry out nondestructive test to bottom protective structure, the impaired condition of real-time supervision bottom structure, RFID sensor (7) receive electric vortex sensor (4) signal to the impaired condition of bottom structure is judged to the discernment signal.

2. The battery pack crash protection and detection apparatus according to claim 1, wherein: laying foam aluminum (2) above the inner-layer bottom plate (3), wherein the eddy current sensor (4) is arranged between the inner-layer bottom plate (3) and the foam aluminum (2).

3. The battery pack collision protection and detection device according to claim 1, wherein four eddy current sensors are arranged between the foamed aluminum (2) and the inner bottom plate (3).

4. The battery pack collision protection and detection device according to claim 1, characterized in that the RFID sensor (7) is located at the cover of the battery pack lower housing (6).