BATTERY MOUNTING STRUCTURE OF ELECTROMOTIVE VEHICLE

• US 20120097466A1
• Filed: 10/19/2011
• Published: 04/26/2012
• Est. Priority Date: 10/26/2010
• Status: Active Grant

• Current Assignee: Mazda Motor Corporation
• Original Assignee: Mazda Motor Corporation
• Inventors: USAMI, Ikuo, KITA, Hirokazu, NOMURA, Hiroyuki, MITOBE, Noriaki
• Granted Patent: US 8,733,487 B2
• Time in Patent Office: Days
• US Class Current: 180/68.5
• CPC Class Codes: B60K 1/04 of the electric storage means for propulsion exchanging batteries for electric propulsion of vehicles B60L53/80; for auxiliary purposes only B60R16/04; supplying batteries to, or removing batteries from, vehicles B60S5/06
• CPC Class Codes: B60K 2001/0438 Arrangement under the floor
• CPC Class Codes: B62D 21/11 with resilient means for suspension , e.g. of wheels or engine; sub-frames for mounting engine or suspensions

Abstract

A battery unit comprises plural side connection portions which are provided at its both-side end portions in a vehicle width direction and connected to said vehicle-body member, and these connection portions are connected to a high rigidity portion of a vehicle-body member, concretely, to the vehicle-body member at a specified position where floor cross members integrally connected to a vehicle floor panel are located, to the vehicle-body member at a specified position where a torque box is located, or to the vehicle-body member at a specified position where a kick-up portion of the vehicle floor panel is located. Accordingly, the torsional rigidity of the vehicle body can be increased by utilizing the battery unit mounted below the vehicle body floor (vehicle floor panel).

Claims

1. A battery mounting structure of an electromotive vehicle, comprising:

a vehicle-body member constituting a vehicle body; and

a battery unit mounted below a vehicle floor, the battery unit comprising a battery module, a support member to support the battery module, and plural side connection portions provided at both-side end portions thereof in a vehicle width direction and connected to said vehicle-body member,

wherein the side connection portions of said battery unit are connected to a high rigidity portion of said vehicle-body member.

2. The battery mounting structure of an electromotive vehicle of claim 1, wherein said vehicle body comprises a floor cross member extending in the vehicle width direction and integrally connected to a vehicle floor panel which constitutes the vehicle floor, and at least part of said side connection portions of the battery unit are connected to the vehicle-body member at a specified position where said floor cross member is located.

3. The battery mounting structure of an electromotive vehicle of claim 1, wherein said vehicle body comprises a torque box, and at least part of said side connection portions of the battery unit are connected to the vehicle-body member at a specified position where said torque box is located.

4. The battery mounting structure of an electromotive vehicle of claim 1, wherein said vehicle body comprises a kick-up portion of a vehicle floor panel which constitutes the vehicle floor, and at least part of said side connection portions of the battery unit are connected to the vehicle-body member at a specified position where said kick-up portion is located.

5. The battery mounting structure of an electromotive vehicle of claim 1, wherein said support member of the battery unit comprises a pair of longitudinal extension portions which extends in a vehicle longitudinal direction at both-side end portions of said battery unit, at least part of said side connection portions of the battery unit are provided at said longitudinal extension portions, and the side connection portions provided at the longitudinal extension portions are connected to a pair of members which extends in the vehicle longitudinal direction and constitutes said vehicle-body member.

6. The battery mounting structure of an electromotive vehicle of claim 5, wherein said pair of members extending in the vehicle longitudinal direction and constituting the vehicle-body member is a pair of front floor frames which is integrally connected to a lower face of the vehicle floor panel.

7. The battery mounting structure of an electromotive vehicle of claim 4, wherein said battery unit comprises a first mount portion which is provided below a front floor portion of the vehicle floor and a second mount portion which is provided in back of said first mount portion to be continuous from the first mount portion and below a rear floor portion of the vehicle floor, said support member of the battery unit comprises a lateral extension frame member which is provided at a connection portion of said first mount portion and said second mount portion and extends in the vehicle width direction, at least part of said side connection portions of the battery unit are connected to both end portions of said lateral extension frame member of the support member of the battery unit, and said at least part of the side connection portions of the battery unit are connected to a pair of side sill constituting the vehicle-body member at a specified position where said kick-up portion is located.

8. The battery mounting structure of an electromotive vehicle of claim 1, wherein said support member of the battery unit comprises a pair of frame members which extends in a vehicle longitudinal direction at both-side end portions of said battery unit, and each of front end portions of said pair of frame members is connected to a suspension cross member supporting front suspension arms.

9. The battery mounting structure of an electromotive vehicle of claim 8, wherein a power unit to drive the electromotive vehicle, said suspension cross member, and said battery unit are arranged in order from a vehicle front to a vehicle rear to overlap each other in a vertical direction.

10. The battery mounting structure of an electromotive vehicle of claim 9, wherein said power unit is connected to said suspension cross member.

11. The battery mounting structure of an electromotive vehicle of claim 8, wherein said battery unit comprises a first mount portion which is provided below a front floor portion of the vehicle floor and a second mount portion which is provided in back of said first mount portion to be continuous from the first mount portion and below a rear floor portion of the vehicle floor, a width, in the vehicle width direction, of said second mount portion is greater than that of said first mount portion, and said pair of frame members is provided at both-side end portions of the first mount portion and extends forwardly from a front end portion of the second mount portion.

12. A battery mounting structure of an electromotive vehicle, comprising:

a vehicle-body member constituting a vehicle body; and

a battery unit mounted below a vehicle floor, the battery unit comprising a battery module, a support member to support the battery module, and plural side connection portions provided at both-side end portions thereof in a vehicle width direction and connected to said vehicle-body member,

wherein the vehicle body comprises a floor cross member extending in the vehicle width direction and integrally connected to a vehicle floor panel which constitutes the vehicle floor, a torque box, and a kick-up portion of a vehicle floor panel which constitutes the vehicle floor,

part of said side connection portions of the battery unit are connected to the vehicle-body member at a specified position where said floor cross member is located,

part of said side connection portions of the battery unit are connected to the vehicle-body member at a specified position where said torque box is located, and

part of said side connection portions of the battery unit are connected to the vehicle-body member at a specified position where said kick-up portion is located.