Battery case structure for vehicle

Abstract

The utility model provides a battery shell structure for a vehicle. The battery shell structure for the vehicle has a light structure and good reliability. A battery case structure for a vehicle includes: a battery case base; and a cover portion provided above the battery case base, in which the cover portion is combined with the battery case base to form a space in which a battery is accommodated, and the cover portion includes a protrusion portion that protrudes upward at least in a region overlapping the battery when viewed from above.

Description

Technical Field

[0001] The utility model relates to a battery casing structure for a vehicle. Background Art

[0002] In recent years, in order to ensure access to affordable, reliable, sustainable and advanced energy for more people, research and development related to secondary batteries that contribute to energy efficiency has been carried out.

[0003] Unlike primary batteries that cannot be recharged, secondary batteries refer to batteries that can be charged and discharged, and are being used as power sources for energy storage systems (ESS), electric vehicles (EV) or hybrid electric vehicles (HEV), and small high-tech electronic devices such as mobile phones, personal digital assistants (PDA) and laptop computers. In the case of using secondary batteries as energy sources for electric vehicles, a battery module having a plurality of battery cells connected in series and / or in parallel is generally configured, and is formed into a structure such as an intelligent power unit (IPU) that functionally maintains the operation of the battery module.

[0004] However, in the technology related to secondary batteries, when the specification test of the combustion characteristics of automobile interior materials is carried out or the battery is in thermal runaway, the battery shell structure of the intelligent power unit is easily expanded due to heat conduction in a high temperature environment. At this time, the cover of the intelligent power unit may bend due to thermal expansion and approach or contact the battery, which may affect the reliability of the battery. For example, a battery unit is disclosed in prior art document 1, which includes a plurality of battery cells, a shell that accommodates and surrounds the battery cells, and a temperature regulating device for regulating the temperature of the battery cells by circulating a heat transfer fluid. In prior art document 1, a step portion is formed on the upper portion of the shell of the battery unit, but the step portion is located at a position overlapping with the battery cell in the vertical direction. In the above structure, since the stepped portion of the upper part of the shell of the battery unit overlaps with the battery cell in the vertical direction, and the upper part of the shell next to the stepped portion is a flat plate-shaped portion, the stepped portion and the flat plate-shaped portion of the upper part of the shell of the battery unit that protrude downward during thermal expansion may be displaced to the battery cell side and contact the battery cell, thereby affecting the reliability of the battery cell.

[0005] In prior art document 1, in order to avoid the above situation, it is necessary to set a separate component such as an insulating material between the upper part of the housing of the intelligent power unit and the battery to prevent heat from being transferred to the housing, so as to suppress thermal expansion of the housing and protect the battery. However, this will lead to an increase in weight and the number of parts, and will also lead to an increase in cost. Therefore, how to take into account the reliability, lightweight and cost control of the battery housing structure at the same time is an important issue.

[0006] In order to solve the above problems, the present invention aims to achieve a battery case structure with good reliability and further contribute to improving energy efficiency.

[0007] [Prior art literature]

[0008] [Patent Document]

[0009] [Patent Document 1] Japanese Patent Publication No. 7250111 Utility Model Content

[0010] The utility model provides a battery housing structure for a vehicle, which has a lightweight structure and good reliability.

[0011] The utility model provides a battery casing structure for a vehicle, comprising: a battery casing base; and a cover portion, which is arranged above the battery casing base, wherein the cover portion is combined with the battery casing base to form a space for accommodating a battery, and the cover portion comprises a raised portion, and when observed from above, the raised portion is raised upward at least in an area overlapping with the battery.

[0012] In an embodiment of the present invention, the cover portion further comprises a protrusion located on the upper surface, and the protrusion is used to accommodate auxiliary equipment.

[0013] In an embodiment of the present invention, the raised portion is inclined upward from the outer side of the region overlapping the battery, and is connected to the protruding portion in an upwardly inclined state.

[0014] In one embodiment of the utility model, the battery casing structure for a vehicle further includes: a peripheral fixing portion, arranged along the periphery of the cover portion; and a central fixing portion, arranged along the central direction of the cover portion, the central direction being staggered with the extension direction of the protrusion, the cover portion being fixed to the battery casing base by the peripheral fixing portion and the central fixing portion, and the raised portion being located in a raised area formed by the peripheral fixing portion, the central fixing portion and the protrusion.

[0015] In an embodiment of the present invention, the battery housing base includes a crossbeam extending along the central direction, and the crossbeam is connected to the central fixing portion.

[0016] Based on the above, in the vehicle battery housing structure of the utility model, the raised portion of the cover has a convex shape that is raised upward in a large range. When the cover is bent due to thermal expansion at high temperature (such as fire), the cover can be surely bulged and displaced in the direction away from the battery, and the possibility of contacting the battery due to bending to the lower side (battery side) can be suppressed by the configuration of the raised portion. In this way, even if a separate component such as an insulating material is not provided to prevent heat from being conducted to the housing, the reliability of the vehicle battery housing structure can be ensured, and the increase in the weight, number of parts and cost of the vehicle battery housing structure can be suppressed, while taking into account the reliability, lightweight and cost control of the vehicle battery housing structure.

[0017] In order to make the above features and advantages of the present invention more obvious and easy to understand, embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional schematic diagram of a battery housing structure for a vehicle according to an embodiment of the utility model;

[0019] Figure 2A yes Figure 1 The schematic cross-sectional view of the vehicle battery housing structure shown is taken along line AA;

[0020] Figure 2B yes Figure 1 The schematic cross-sectional view of the vehicle battery housing structure is shown along line BB.

[0021] Description of reference numerals:

[0022] 100: Battery housing structure for vehicles

[0023] 110: Battery housing base

[0024] 111: Beam

[0025] 120: cover

[0026] 121: Bump

[0027] 122: Protrusion

[0028] 130: Peripheral fixing part

[0029] 140: Central fixing part

[0030] BA: Battery

[0031] PR: raised region. DETAILED DESCRIPTION

[0032] Figure 1is a three-dimensional schematic diagram of a battery housing structure for a vehicle according to an embodiment of the utility model; Figure 2A yes Figure 1 The schematic cross-sectional view of the vehicle battery housing structure shown is taken along line AA; Figure 2B yes Figure 1 The schematic cross-sectional view of the vehicle battery housing structure shown is taken along line BB. In this embodiment, the vehicle battery housing structure 100 refers to a battery module as an energy source in an electric vehicle and a partial housing structure of an intelligent power unit (IPU) that functionally maintains the operation of the battery module. Figures 1 to 2B The specific structure of the vehicle battery case structure 100 will be described.

[0033] Please refer to Figures 1 to 2B In this embodiment, the vehicle battery housing structure 100 includes a battery housing base 110 and a cover 120, and the cover 120 is disposed above the battery housing base 110. Figure 2A and Figure 2B As shown, the cover 120 is combined with the battery housing base 110 to form a space for accommodating the battery BA. Figure 1 As shown, the cover 120 includes a raised portion 121, and when viewed from above, the raised portion 121 is raised upward at least in the area overlapping with the battery BA. In this way, by providing the raised portion 121 in the area where the cover 120 overlaps with the battery BA when viewed from above, and the raised portion 121 of the cover 120 has a convex shape that is raised upward in a large range, it is possible to suppress deformation of the lower side of the area where the cover 120 overlaps with the battery BA when viewed from above due to thermal expansion. Further, by having the raised portion 121 of the cover 120 have a convex shape that is raised upward in a large range, when the cover 120 is bent due to thermal expansion at high temperatures (such as fire), the cover 120 can be reliably bulged and displaced in a direction away from the battery BA, and the possibility of contacting the battery BA due to bending to the lower side (battery BA side) can be suppressed by the configuration of the raised portion 121. In this way, even if a separate component such as an insulating material is not provided to prevent heat from being conducted to the vehicle battery housing structure 100, the reliability of the vehicle battery housing structure 100 can be ensured, thereby suppressing the increase in the weight, number of parts and cost of the vehicle battery housing structure 100, while taking into account the reliability, lightweight and cost control of the vehicle battery housing structure 100.

[0034] More specifically, if Figure 1As shown, in this embodiment, the cover 120 further includes a protrusion 122 located on the upper surface, wherein the height of the protrusion 122 is greater than the ridge 121 and can be used to accommodate auxiliary equipment. In this way, by forming the protrusion 122, it is possible to suppress the increase in the protrusion amount toward the upper side of the vehicle battery housing structure 100 caused by forming a ridge on the entire cover 120 in the width direction D1.

[0035] On the other hand, Figure 1 As shown, in this embodiment, the vehicle battery housing structure 100 further includes a peripheral fixing portion 130 and a central fixing portion 140, wherein the peripheral fixing portion 130 is arranged along the periphery of the cover portion 120, and the central fixing portion 140 is arranged along the central direction DC of the cover portion 120, and the central direction DC is staggered with the extension direction DE of the protrusion 122. The cover portion 120 is fixed to the battery housing base 110 by the peripheral fixing portion 130 and the central fixing portion 140. For example, the peripheral fixing portion 130 and the central fixing portion 140 can be fasteners such as bolts. The raised portion 121 is located in a raised area PR formed by the peripheral fixing portion 130, the central fixing portion 140 and the protrusion 122, and as shown Figures 1 to 2B As shown, in this embodiment, the raised portion 121 is inclined upward from the outside of the region overlapping the battery BA, and is connected to the protruding portion 122 in an upwardly inclined state.

[0036] Thus, by forming a structure in which the bulge 121 and the protrusion 122 are continuously connected in the width direction D1, the bulge 121 can be tilted upward within the range of overlapping with the battery BA in the vertical direction D2, without forming a flat plate-like or convex shape. Thus, when the cover 120 of the battery case structure 100 for a vehicle is bent due to thermal expansion, the cover 120 can avoid being displaced toward the battery BA side and contacting the battery BA, and can be surely bulged and displaced in a direction away from the battery BA, thereby further ensuring the reliability of the battery case structure 100 for a vehicle. In addition, by forming the central fixing portion 140 in the central direction DC intersecting with the extension direction DE of the protrusion 122, the bonding strength between the cover 120 and the battery case base 110 can be enhanced, and the formation of a bulge on the entire cover 120 in the front-rear direction D3 can be prevented, thereby suppressing the increase in the protrusion amount of the cover 120 toward the upper side of the battery case structure 100 for a vehicle.

[0037] In addition, if Figure 2BAs shown, in this embodiment, the battery case base 110 includes a crossbeam 111 extending along the central direction DC, and the crossbeam 111 is connected to the central fixing portion 140. In this way, by connecting the crossbeam 111 and the central fixing portion 140 of the battery case base 110, when the battery case base 110 expands due to thermal expansion, the protrusion amount of the cover 120 toward the upper side of the vehicle battery case structure 100 can be suppressed.

[0038] In summary, in the battery housing structure for vehicles of the utility model, the raised portion of the cover has a convex shape that is raised upward in a large range. When the cover is bent due to thermal expansion at high temperature (such as fire), the cover can be surely expanded and displaced in the direction away from the battery, and the possibility of contact with the battery due to bending to the lower side (battery side) can be suppressed by the configuration of the raised portion. In this way, even if a separate component such as an insulating material is not provided to prevent heat from being conducted to the housing, the reliability of the battery housing structure can be ensured, and the weight, number of parts and cost of the battery housing structure for vehicles can be suppressed, while taking into account the reliability, lightweight and cost control of the battery housing structure.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solution recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A battery housing structure for a vehicle, characterized in that: include: A battery housing base; as well as A cover is arranged above the battery housing base, wherein the cover is combined with the battery housing base to form a space for accommodating the battery, and the cover includes a raised portion, which, when viewed from above, bulges upward at least in an area overlapping with the battery.

2. The vehicle battery housing structure according to claim 1, characterized in that: The cover also includes a protrusion located on the upper surface, and the protrusion is used to accommodate auxiliary equipment.

3. The vehicle battery housing structure according to claim 2, characterized in that: The raised portion is inclined upward from the outside of a region overlapping the battery, and is connected to the protruding portion in an upwardly inclined state.

4. The vehicle battery housing structure according to claim 2, characterized in that: Also includes: A peripheral fixing portion, arranged along the peripheral edge of the cover portion; as well as The central fixing portion is arranged along the central direction of the cover portion, and the central direction is staggered with the extension direction of the protrusion. The cover portion is fixed to the battery casing base through the peripheral fixing portion and the central fixing portion, and the raised portion is located in a raised area formed by the peripheral fixing portion, the central fixing portion and the protrusion.

5. The vehicle battery housing structure according to claim 4, characterized in that: The battery housing base includes a crossbeam extending along the central direction, and the crossbeam is connected to the central fixing portion.

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