CN215284335U

CN215284335U - Arrangement structure of vehicle-mounted battery pack

Info

Publication number: CN215284335U
Application number: CN202121150961.2U
Authority: CN
Inventors: 加藤胜善
Original assignee: Toyota Motor Corp
Current assignee: Toyota Motor Corp
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2021-12-24
Anticipated expiration: 2031-05-26

Abstract

The utility model provides a structure that sets up of on-vehicle group battery of using. The battery pack is provided in a space between a rear seat and a vehicle body floor, a rear opening of the space is closed by a rising wall provided on the vehicle body floor, a front opening of the space is covered by an interior trim, a waterproof tray disposed on the vehicle body floor and having a rising wall formed on an outer periphery thereof, and an upper cover attached to an upper side of the waterproof tray and having a hanging wall formed on an outer periphery thereof so as to surround the rising wall of the waterproof tray cover a plurality of battery modules of the battery pack, a rear portion of the rising wall of the waterproof tray faces the rising wall of the vehicle body floor with a gap therebetween, a rear portion of the hanging wall faces a rear portion of the rising wall of the waterproof tray with a gap therebetween, and a flow of air for cooling flows from a front side of the vehicle to a rear side of the vehicle through the gap between the battery modules. With the above configuration, fine particles of the electrolyte can be prevented from adhering to the bottom surface of the rear seat or flowing into the vehicle compartment.

Description

Arrangement structure of vehicle-mounted battery pack

Technical Field

The utility model relates to a set up structure of on-vehicle group battery of using.

Background

In general, a large battery pack is mounted in a hybrid vehicle using an engine and a motor as drive sources, and an electric vehicle using a motor as a drive source. The battery pack is configured by stacking a plurality of battery modules with a gap therebetween in the vehicle height direction, for example. The battery pack is often disposed in a space between the rear seat and the vehicle body floor.

Since the battery pack generates heat, it is usually air-cooled with an electric fan. That is, the wind (airflow) generated by the electric fan is caused to flow from the front of the vehicle to the rear of the vehicle through the gaps between the battery modules of the battery pack.

In addition, the battery pack is provided with a breakable portion that is easily broken when the internal pressure is too high. Since a slight amount of electrolyte may leak out when the breakable portion is broken, a device for detecting the electrolyte leakage is further provided.

However, since the battery pack is used as usual until the leakage is detected after the leakage of the electrolyte, there is a possibility that fine particles of the leaked electrolyte may pass through gaps between the battery modules with the wind blown by the electric fan to reach the rear of the battery modules and then adhere to the bottom surface of the rear seat or flow into the vehicle compartment.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a structure for mounting an on-vehicle battery pack, which can prevent fine particles of leaked electrolyte from adhering to the bottom surface of a rear seat or flowing into a vehicle compartment when a battery module of the battery pack leaks a small amount of electrolyte.

As a technical solution to solve the above technical problem, the utility model provides a structure that sets up of on-vehicle battery group, this structure that sets up of on-vehicle battery group be used for with by a plurality of battery module in the vehicle height direction interval ground range upon range of and the group battery setting that constitutes in the space between the back row seat in the carriage and the vehicle bottom plate, its characterized in that: a rising wall for closing a rear-side opening of the space is provided at a portion of the floor panel corresponding to a rear end of the rear seat, an interior member for covering the front opening is provided at the front opening of the space, a waterproof tray disposed on the bottom surface of the underbody and having an upright wall formed on the outer periphery thereof, and an upper cover attached to the upper side of the waterproof tray and having a hanging wall formed on the outer periphery thereof so as to surround the upright wall of the waterproof tray, the upper cover covering the plurality of battery modules, the rear part of the rising wall of the waterproof tray faces the rising wall of the vehicle body floor with a gap, the rear part of the hanging wall and the rear part of the rising wall of the waterproof tray face each other with a gap, the battery pack is configured in a state in which an airflow for air cooling can flow from the front of the vehicle to the rear of the vehicle through the gaps between the battery modules.

Based on the utility model discloses a setting structure of on-vehicle battery group, under the condition that a certain one of a plurality of battery module leaked out the micro-electrolyte, the fine particle of the electrolyte that leaks can flow toward the rear portion of the wall that stands of waterproof tray along with the air current for cooling, among the fine particle of this electrolyte that is carried by the air current, most can collide with the rear portion of the wall that stands of waterproof tray and fall to the interior bottom of waterproof tray, the fine particle of the remaining part can cross the rear portion of the wall that stands of waterproof tray, then collide with the rear portion of the flagging wall of upper portion lid and pass from the clearance between the rear portion of this flagging wall and the rear portion of the wall that stands of waterproof tray, and flow into the clearance between the rear portion of the wall that stands of waterproof tray and the wall that stands of underbody, finally fall on the bottom surface of underbody. Therefore, fine particles of the electrolyte can be prevented from adhering to the bottom surface of the rear seat or flowing into the vehicle compartment.

Drawings

Fig. 1 is a schematic diagram showing an arrangement structure of an in-vehicle battery pack according to an embodiment of the present invention.

Fig. 2 is a schematic diagram showing a part of fig. 1 in an enlarged manner.

Detailed Description

Hereinafter, an installation structure of an in-vehicle battery pack according to an embodiment of the present invention will be described with reference to the drawings.

Fig. 1 is a schematic diagram showing an installation structure of an in-vehicle battery pack according to the present embodiment. As shown in fig. 1, a vehicle-mounted battery pack (hereinafter, simply referred to as a battery pack) 4 is provided in a space 3 between a rear seat 1 and a vehicle body floor 2 in a vehicle compartment.

At the front-side opening of the space 3, an interior member 5 for covering the front-side opening is provided. A standing wall 21 is provided at a portion of the floor 2 corresponding to the rear end of the rear seat 1. The rising wall 21 abuts against the bottom surface of the rear seat 1, and closes the rear opening of the space 3.

The battery pack 4 is configured by stacking a plurality of battery modules 41 with a gap 42 therebetween in the vehicle height direction, and then placing the plurality of battery modules 41 on the waterproof tray 6 with the

binding plates

43 and 44 sandwiched from the upper and lower sides and covering the waterproof tray with the upper cover 7.

The waterproof tray 6 is disposed on the bottom surface of the vehicle body floor 2, and has a rising wall 61 formed on the outer periphery thereof. Fig. 2 is a schematic diagram showing a part of fig. 1 in an enlarged manner. As shown in fig. 2, the rear portion 61a of the rising wall 61 faces the rising wall 21 of the vehicle body floor 2 with a gap 46 therebetween.

The upper cover 7 is assembled to the upper side of the waterproof tray 6, and its outer periphery is formed with a hanging wall 71. The hanging wall 71 is configured to surround the rising wall 61 of the waterproof tray 6.

Therefore, the waterproof tray 6 and the upper lid 7 cover the plurality of battery modules 41 sandwiched by the

binding plates

43 and 44 from the upper and lower sides.

Further, in the vehicle height direction, there is a certain length of space between the front portion of the rising wall 61 of the waterproof tray 6 and the front portion of the hanging-down wall 71 of the upper cover 7, and this space is covered with the cover 8.

Only the rear portion 71a of the hanging wall 71 faces the rear portion 61a of the rising wall 61 of the waterproof tray 6 with the gap 45.

Since the battery pack 4 generates heat, an electric fan (not shown) for cooling the battery pack 4 is provided. The electric fan is disposed at a position further inside than the battery pack 4 in fig. 1, and thus is not shown.

Specifically, the wind (airflow) generated by the electric fan flows from the inside to the outside of the paper surface in fig. 1, and the airflow changes its direction after hitting the rising wall 61 of the waterproof tray 6 and the hanging wall 71 of the upper lid 7, and flows from the vehicle front to the vehicle rear through the gap 42 between the battery modules 41 as shown by the arrows in fig. 1. By this airflow, each battery module 41 is cooled. Therefore, the gap 42 becomes a passage of the air flow.

The air flow flowing through the gap 42 collides with the rear portion 61a of the rising wall 61 of the waterproof tray 6 and the rear portion 71a of the hanging wall 71 of the upper cover 7, and a part thereof passes through the gap 45 between the rear portion 61a of the rising wall 61 of the waterproof tray 6 and the rear portion 71a of the hanging wall 71 of the upper cover 7 and flows into the gap 46 between the rising wall 21 of the floor panel 2 and the rear portion 61a of the rising wall 61 of the waterproof tray 6 as shown by the arrow in fig. 2.

On the other hand, the battery module 41 is provided with a breakable portion that is easily broken when the internal pressure thereof is too high. In consideration of the possibility of a slight amount of electrolyte leaking out when the breakable portion is broken, a device for detecting electrolyte leakage is provided.

However, if a slight amount of electrolyte leaked from a breakable portion of one of the plurality of battery modules 41 enters the gap 42 when the internal pressure of the battery pack 4 is excessively high, the battery pack 4 is still in normal use until the leakage is detected, and therefore, fine particles of the leaked electrolyte are carried to the rear by the airflow passing through the gap 42 between the battery modules 41.

In the present embodiment, most of the fine particles carried by the air flow collide with the rear portion 61a of the rising wall 61 of the waterproof tray 6 and fall (gather) on the inner bottom portion of the waterproof tray 6, but some of the fine particles pass over the rear portion 61a of the rising wall 61 of the waterproof tray 6.

The fine particles that have passed over the rear portion 61a of the upright wall 61 collide with the rear portion 71a of the hanging-down wall 71 of the upper cover 7, then pass through the gap 45 between the rear portion 71a of the hanging-down wall 71 and the rear portion 61a of the upright wall 61 of the waterproof tray 6, enter the gap 46 between the rear portion 61a of the upright wall 61 of the waterproof tray 6 and the upright wall 21 of the floor panel 2, and finally fall (gather) on the bottom surface of the floor panel 2.

This prevents fine particles of the leaked electrolyte from adhering to the bottom surface of the rear seat 1 exposed in the space 3 or flowing into the vehicle compartment.

With the arrangement structure of the in-vehicle battery pack 4 according to the present embodiment, when a small amount of electrolyte leaks from the battery pack 4 as described above, it is possible to prevent fine particles of the leaked electrolyte from adhering to the bottom surface of the rear seat 1 or flowing into the vehicle compartment.

The present invention is not limited to the description of the above embodiments, and various modifications and applications can be made. For example, in the above embodiment, the number of battery modules 41 of the battery pack 4 is not limited.

Claims

1. An arrangement structure of a vehicle-mounted battery pack for arranging a battery pack, which is configured by stacking a plurality of battery modules with a gap therebetween in a vehicle height direction, in a space between a rear seat and a vehicle body floor in a vehicle compartment, characterized in that:

a rising wall for closing a rear-side opening of the space is provided at a portion of the floor panel corresponding to a rear end of the rear seat,

an interior trim for covering the front opening is provided at the front opening of the space,

a waterproof tray disposed on the bottom surface of the underbody and having an upright wall formed on the outer periphery thereof, and an upper cover attached to the upper side of the waterproof tray and having a hanging wall formed on the outer periphery thereof so as to surround the upright wall of the waterproof tray, the upper cover covering the plurality of battery modules,

the rear part of the rising wall of the waterproof tray faces the rising wall of the vehicle body floor with a gap,

the rear part of the hanging wall and the rear part of the rising wall of the waterproof tray face each other with a gap,

the battery pack is configured in a state in which an airflow for air cooling can flow from the front of the vehicle to the rear of the vehicle through the gaps between the battery modules.