Battery pack structure

Abstract

To provide a battery pack structure that prevents short circuits during interference and has good packaging efficiency.SOLUTION: A battery pack structure includes a first battery pack in which a first battery module consisting of a plurality of stacked battery cells is housed in a first case and a first cover that seals the first case from above, and a second battery pack located below the first battery pack in which a second battery module consisting of a plurality of stacked battery cells is housed in a second case and a second cover that seals the second case from below.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a battery pack structure. [Background technology]

[0002] Patent Document 1 discloses a power supply device in which battery packs are stacked one above the other with their top surfaces facing each other. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-115285 Summary of the Invention [Problem to be solved by the invention]

[0004] The power supply device of Patent Document 1 has a passage on the bottom end surface through which the heat exchange medium passes, and there is a risk of leakage and short circuit when interference occurs from the road surface side.

[0005] Furthermore, in the power supply device of Patent Document 1, the passage through which the heat exchange medium passes and the exhaust path for the gas generated from the battery pack are provided on both the upper and lower end faces, which results in poor packaging efficiency.

[0006] The present disclosure has been made in view of the above, and has an object to provide a battery pack structure that prevents short circuits during interference and has good packaging efficiency. [Means for solving the problem]

[0007] The battery pack structure of the present disclosure comprises a first battery pack in which a first battery module consisting of a plurality of stacked battery cells is housed in a first case and a first cover that seals the first case from above, and a second battery pack located below the first battery pack in which a second battery module consisting of a plurality of stacked battery cells is housed in a second case and a second cover that seals the second case from below. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to prevent short circuits during interference and realize a battery pack structure with good packaging efficiency. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic diagram of a battery pack structure according to an embodiment. [Figure 2] FIG. 2 is a diagram showing the structure of a battery pack according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] The battery pack structure according to the embodiment of the present disclosure will be described with reference to the drawings. Note that the components in the following embodiments include those that are easily replaceable by those skilled in the art, or those that are substantially the same.

[0011] (Embodiment) Fig. 1 is a schematic diagram of a battery pack structure according to an embodiment. In Fig. 1, UPR represents the upper side of a vehicle equipped with the battery pack structure 1, and RH represents the right side of the vehicle equipped with the battery pack structure 1. The battery pack structure 1 includes a first battery pack 2, a second battery pack 3 located below the first battery pack 2, and a cooler 4 disposed between the first battery pack 2 and the second battery pack 3.

[0012] The first battery pack 2 includes three first battery modules 21 arranged horizontally, a first case 22, and a first cover 23. The first battery modules 21 are housed in the first case 22 and the first cover 23 that seals the first case 22 from above, with the upper side facing toward the top of the vehicle. However, the number and orientation of the first battery modules 21 are not particularly limited.

[0013] The second battery pack 3 includes three second battery modules 31 arranged horizontally, a second case 32, and a second cover 33. The second battery modules 31 are housed in the second case 32 and the second cover 33 that seals the second case 32 from below, with the upper side facing downward of the vehicle. However, the number and orientation of the second battery modules 31 are not particularly limited.

[0014] The first battery module 21 and the second battery module 31 are each made up of a plurality of stacked battery cells, and the electrode body housed inside the battery cell includes a solid electrolyte.

[0015] The first case 22 and the second case 32 are made of the same material and have the same shape, and are arranged so that their openings are located on opposite sides of each other.

[0016] The rigidity of the second cover 33 is greater than the rigidity of the first cover 23. Specifically, the first cover 23 and the second cover 33 are designed to be made of different materials and have different plate thicknesses, thereby achieving a predetermined rigidity.

[0017] Furthermore, the distance L2 between the second cover 33 and the second battery module 31 is greater than the distance L1 between the first cover 23 and the first battery module 21. As an example, the distance L2 between the second cover 33 and the second battery module 31 is 20 mm, and the distance L1 between the first cover 23 and the first battery module 21 is 7 mm.

[0018] The cooler 4 cools the first battery module 21 and the second battery module 31 with a coolant.

[0019] According to the embodiment described above, since no coolant flow path is arranged on the lower end surface of the battery pack structure 1, leakage of liquid and short circuiting when the battery pack structure 1 is interfered with from the road surface side are prevented.

[0020] Furthermore, according to the embodiment, the rigidity of the second cover 33 is high, and the distance L2 between the second cover 33 and the second battery module 31 is large, and this space functions as an EA (Energy Absorption) space, preventing leakage and short circuits when there is interference from the road surface.

[0021] Furthermore, according to the embodiment, the cooler 4 is arranged outside the first battery pack 2 and the second battery pack 3, so even if leakage occurs during interference, the liquid is less likely to enter the inside of the first battery pack 2 and the second battery pack 3.

[0022] Furthermore, according to the embodiment, the cooler 4 is disposed between the first battery pack 2 and the second battery pack 3, which results in good packaging efficiency.

[0023] Furthermore, according to the embodiment, the rigidity of the second cover 33 is high, and the distance L2 between the second cover 33 and the second battery module 31 is large, and this space functions as a smoke exhaust space, resulting in good packaging efficiency.

[0024] Furthermore, according to the embodiment, the first cover 23 has low rigidity, so that the first cover 23 is deformed by external interference, and a smoke exhaust space is secured, resulting in good packaging efficiency.

[0025] Furthermore, according to the embodiment, first case 22 and second case 32 are made of the same material and are the same member having the same shape, which makes it possible to prevent the number of types of parts from increasing.

[0026] (Example) 2 is a configuration diagram of a battery pack structure according to an embodiment of the present invention, and as shown in FIG. 2, the battery pack structure 1 described in the embodiment can be realized.

[0027] Further advantages and modifications will readily occur to those skilled in the art. Thus, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents. [Explanation of symbols]

[0028] 1 Battery pack structure 2. First battery pack 3 Second Battery Pack 4 Cooler 21 First battery module 22 Case 1 23 First Cover 31 Second battery module 32 Second Case 33 Second Cover

Claims

1. a first battery pack in which a first battery module consisting of a plurality of stacked battery cells is housed in a first case and a first cover that seals the first case from above; a second battery pack located below the first battery pack, the second battery module being made up of a plurality of stacked battery cells and housed in a second case and a second cover that seals the second case from below; A battery pack structure comprising:

2. The battery pack structure according to claim 1 , further comprising a cooler disposed between the first battery pack and the second battery pack, for cooling the first battery module and the second battery module.

3. 2. The battery pack structure according to claim 1, wherein the rigidity of the second cover is greater than the rigidity of the first cover.

4. 2. The battery pack structure according to claim 1, wherein the first case and the second case are made of the same material and have the same shape, and are arranged so that the openings are located on opposite sides of each other.

5. The battery pack structure according to claim 1 , wherein the distance between the second cover and the second battery module is greater than the distance between the first cover and the first battery module.

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