Battery pack

Abstract

The invention provides a battery pack capable of properly fixing a battery module in a shell. The battery pack includes: a case; the plurality of battery modules are stacked and accommodated in the shell; a sealing material which is made of resin and is arranged at a position closer to the outer side than the end part of the battery module; an energizing plate which is laminated between the battery modules such that the end portion thereof is positioned further toward the inside than the end portion of the battery modules, and which electrically connects the battery modules to each other; a cooler which is laminated between the battery modules so that the end portions thereof are positioned further toward the inside than the end portions of the battery modules, and which cools the battery modules; and a filling member which is filled in the housing and which adheres and fixes the battery module, the energizing plate, and the cooler to each other in the housing.

Description

Technical Field

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

[0002] In Patent Document 1, there is described a battery including an anisotropic stretching portion that is located on the outer periphery of a single cell and also serves as a sealing portion for sealing the inside of the single cell, and a lateral restricting portion that is disposed between a side wall portion of a battery case and the anisotropic stretching portion.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2018-081820 Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] When the anisotropic stretching portion and the lateral restricting portion are both made of resin, since the adhesiveness between the resins is low, there is a case where the battery cells cannot be properly fixed in the case.

[0008] In view of the above circumstances, the present disclosure is made, and an object thereof is to provide a battery pack capable of properly fixing a battery module in a case.

[0009] Means for Solving the Problems

[0010] The battery pack of the present disclosure includes: a case; a plurality of battery modules that are stacked and housed in the case; a seal made of resin and provided outside the end of the battery module; a power supply plate that is stacked between the battery modules with its end located at a position closer to the inside than the end of the battery module and electrically connects the battery modules; a cooler that is stacked between the battery modules with its end located at a position closer to the inside than the end of the battery module and cools the battery modules; and a filler that fills the case and bonds and fixes the battery modules, the power supply plate, and the cooler to each other in the case.

[0011] Advantages of the Invention

[0012] According to the present disclosure, it is possible to realize a battery pack capable of properly fixing a battery module in a case. Brief Description of the Drawings

[0013] Figure 1 It is a cross-sectional view of the battery pack of Embodiment 1.

[0014] Figure 2 It is a cross-sectional view of the battery pack of Embodiment 2.

[0015] Figure 3 is a view of the protruding portion as viewed from above Figure 2 shown in the figure

[0016] Figure 4 is a cross-sectional view of the battery pack according to Embodiment 3

[0017] Description of reference numerals

[0018] 1 Battery pack

[0019] 2 Housing

[0020] 3 Battery module

[0021] 4 Seal

[0022] 5 Current-carrying plate

[0023] 5Aa, 6Aa Protruding portion

[0024] 6 Cooler

[0025] 6Ba Cooling flow path

[0026] 7 Current collector member

[0027] 8 Filler

[0028] 8a Filling portion

[0029] 8b Bonding portion Detailed implementation manners

[0030] The battery pack according to the embodiment of the present disclosure will be described with reference to the accompanying drawings. In addition, the constituent elements in the following embodiments include constituent elements that can be replaced by those skilled in the art and are easy to replace, or substantially the same constituent elements

[0031] (Embodiment 1)

[0032] Figure 1 is a cross-sectional view of the battery pack according to Embodiment 1. The battery pack 1 includes a housing 2, a battery module 3, a seal 4, a current-carrying plate 5, a cooler 6, a current collector member 7, and a filler 8

[0033] The battery pack 1 is, for example, a battery mounted on a vehicle

[0034] The housing 2 houses each member constituting the battery pack 1

[0035] The battery module 3 is stacked in multiple layers along the stacking direction ( Figure 1 the vertical direction). The stacked multiple battery modules 3 are housed in the housing 2

[0036] The seal 4 is provided at a position closer to the end of the battery module 3 (the end in the direction orthogonal to the stacking direction, that isFigure 1 at the outer side near the end on the left side). The seal 4 is made of an insulating member such as resin and protects the battery module 3.

[0037] The power supply plate 5 is laminated between the battery modules 3 in such a manner that the ends are located at positions closer to the inside than the ends of the battery module 3. The power supply plate 5 electrically connects between the battery modules 3.

[0038] The cooler 6 is laminated between the battery modules 3 in such a manner that the ends are located at positions closer to the inside than the ends of the battery module 3. The cooler 6 cools the battery module 3.

[0039] The current collecting member 7 extracts the power of the stacked battery modules 3 as the total positive terminal or the total negative terminal.

[0040] The filler 8 is filled in the housing 2, bonds the battery module 3, the power supply plate 5, and the cooler 6 to each other, and fixes them in the housing 2. The filler 8 includes a filling portion 8a that fills the gap between the battery module 3 and the seal 4 and the housing 2, and an adhesive portion 8b that immerses between the battery module 3 and the power supply plate 5 and between the battery module 3 and the cooler 6 to bond the battery module 3 and the power supply plate 5, and the battery module 3 and the cooler 6 respectively. The filler 8 is made of a material such as resin that changes to a solid state after being filled in the housing 2 in a liquid state.

[0041] According to the first embodiment described above, by positioning the ends of the power supply plate 5 and the cooler 6 closer to the inside than the ends of the battery module 3, the battery module 3, the power supply plate 5, and the cooler 6 with good adhesiveness to the resin can be bonded to the filler 8, so that the battery module 3 can be appropriately fixed in the housing 2.

[0042] In addition, according to the first embodiment, the filler 8 is made of a material such as resin that changes to a solid state after being filled in the housing 2 in a liquid state. Therefore, the filler 8 becomes a shape that follows the shape of each component, and the battery module 3 can be appropriately fixed in the housing 2.

[0043] In addition, according to the first embodiment, there is no need to separately apply an adhesive between the battery module 3 and the power supply plate 5 and between the battery module 3 and the cooler 6. Therefore, the materials of the power supply plate 5 and the cooler 6 can be selected without considering adhesiveness. As a result, a material with higher electrical conductivity can be selected as the power supply plate 5, and a material with higher cooling performance can be selected as the cooler 6.

[0044] (Second Embodiment)

[0045] Figure 2 is a cross-sectional view of the battery pack of the second embodiment. As Figure 2As shown, in the battery pack 1A, the conducting plate 5A includes an extension 5Aa extending outward from the end of the battery module 3. Similarly, the cooler 6A includes an extension 6Aa extending outward from the end of the battery module 3.

[0046] Figure 3 It is observed from above Figure 2 FIG. Figure 3 As shown in FIG. 1 , the extension portion 6Aa of the cooler 6A is provided at least one position on each side. Similarly, the extension portion 5Aa of the current-carrying plate 5A is also provided at least one position on each side.

[0047] According to the second embodiment described above, the provision of the extending portion 5Aa and the extending portion 6Aa increases the bonding area, and thus the battery module 3 can be more firmly fixed in the case 2 .

[0048] Furthermore, by providing the extended portion 5Aa and the extended portion 6Aa at at least one location on each side, the current-carrying plate 5A and the cooler 6A are more firmly bonded to the filler 8 on each side.

[0049] (Implementation 3)

[0050] Figure 4 : is a cross-sectional view of a battery pack according to Embodiment 3. Figure 4 As shown, in the battery pack 1B, the extension portion 6Ba extending from the cooler 6B has a cooling flow path 6Bb formed therein.

[0051] According to the third embodiment described above, the cooling performance can be improved by forming the cooling flow path 6Bb inside the overhanging portion 6Ba.

[0052] Further effects and modifications can be easily derived by those skilled in the art. Therefore, the broader scope of the present invention is not limited to the specific detailed and representative embodiments shown and described above. Therefore, various modifications can be made without departing from the spirit or scope of the general inventive concept defined by the appended claims and their equivalents.

Claims

1. A battery pack, comprising: A housing; A plurality of battery modules, stacked and housed in the housing; A seal, made of resin, provided outside the end of the battery module; A power conduction plate, stacked between the battery modules with its end located inside the end of the battery module, and electrically connecting the battery modules; A cooler, stacked between the battery modules with its end located inside the end of the battery module, and cooling the battery modules; and A filler, filled in the housing, bonding the battery modules, the power conduction plate, and the cooler to each other and fixing them in the housing.

2. The battery pack according to claim 1, The power conduction plate or the cooler has a protruding portion extending outside the end of the battery module.

3. The battery pack according to claim 2, The protruding portion extending from the cooler has a cooling flow path formed therein.

4. The battery pack according to claim 1, The filler is made of a material that changes from a liquid state to a solid state after being filled into the housing.

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