Battery module

Abstract

To provide a battery module capable of cooling equipment components in the battery module without newly providing a fan or a flow passage.SOLUTION: A battery module 10 includes a cooler 12 provided on a floor surface of a lower case 13, a battery stack 11 disposed on the cooler 12, and a device bracket 15 on which a device component 14 is mounted. The device bracket 15 has a fastening point 17 that is fastened to the floor surface of the lower case 13 at a position where the cooler 12 is disposed.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a battery module. [Background technology]

[0002] Patent Document 1 describes a battery module that has a flow path for circulating a cooling medium in parallel with the battery and accessories, and that circulates the cooling medium through the flow path by a fan. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-306726 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the need for a fan and a flow path results in a large battery module. [Means for solving the problem]

[0005] In one embodiment of the battery module, the equipment bracket has a fastening point for fastening to the floor surface of the lower case at the position where the cooler is disposed. [Effects of the Invention]

[0006] According to the battery module of the present disclosure, it is possible to cool the components inside the battery module without providing a new fan or flow path. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view showing an example of a battery module according to a first embodiment. [Figure 2] FIG. 1 is a perspective view showing an example of a current battery module. DETAILED DESCRIPTION OF THE INVENTION

[0008] Embodiment 1 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. Fig. 1 is a perspective view showing an example of a battery module according to a first embodiment.

[0009] The battery module 10 includes a stack 11 , a cooler 12 , a lower case 13 , equipment components 14 , an equipment bracket 15 , and a junction box 16 .

[0010] The stack 11 is a structure in which battery cells are stacked.

[0011] A cooler 12 is installed below the stack 11 to cool the stack 11 .

[0012] The lower case 13 is a case that is recessed in the center and has a bottom surface that is formed in a generally rectangular container shape.

[0013] The device component 14 is an electronic circuit associated with the battery cells in the stack 11 .

[0014] The equipment bracket 15 is a component that fixes the equipment component 14 to the lower case 13. The fastening point 17 of the equipment bracket 15 is provided at the position where the cooler 12 is arranged. The fastening is performed by inserting a stud bolt into the lower case 13 and fastening it with a nut.

[0015] The junction box 16 is a terminal box that collects all of the wiring within the battery module and distributes it to input and output terminals.

[0016] Next, a comparison with current battery modules will be described. Fig. 2 is a perspective view showing an example of a current battery module. In Fig. 2, the same components as in Fig. 1 are assigned the same numbers, and their explanations will be omitted. The battery module 20 includes a stack 11, a cooler 12, a lower case 13, equipment components 14, an equipment bracket 21, and a junction box 16.

[0017] The fastening point 22 of the equipment bracket 21 is fastened to an uncooled portion of the lower case 13. When the system main relay in the junction box 16 is driven, the coil inside the system main relay generates heat. The heated air 23 from the junction box 16 then heats the equipment components 14 on the top surface. As a result, the equipment components 14 may stop working, and the voltage and temperature inside the battery module 20 may not be monitored correctly.

[0018] Compared to the battery module 20, the battery module 10 improves heat dissipation of the component parts 14 by fastening the component brackets 15 to the cooled flat surface of the lower case 13. In other words, heat is dissipated by the connection between the cooled part of the lower case 13 and the fastened part.

[0019] According to the battery module of the present disclosure, by fastening the component bracket to the cooling section of the lower case, heat can be dissipated from component parts exposed to the heat from the junction box. Furthermore, the cooling structure can be used to directly dissipate heat from component parts to the lower case. Furthermore, because the structure is simple and can be accommodated by simply modifying the electronics pack's internal structure, there is no need to change measures taken from outside the battery pack to protect against collisions or other damage. Furthermore, because heat is dissipated from the component base bracket where it is fastened to the floor of the lower case, component parts can be prevented from becoming too hot without the need for a fan or air passage. [Explanation of symbols]

[0020] 10, 20 battery modules 11 Stack 12 Cooler 13 Lower case 14 Equipment parts 15, 21 Equipment bracket 16 Junction Box 17, 22 Fastening points

Claims

[Claim 1] a cooler provided on the floor surface of the lower case; a battery stack disposed on the cooler; and It has an equipment bracket with equipment parts mounted on it, The battery module, wherein the equipment bracket has a fastening point for fastening to a floor surface of the lower case at a position where the cooler is disposed.

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