Battery pack

Abstract

To provide a battery pack that further suppresses the thermal effect of exhausted gas on a wire harness.SOLUTION: A battery pack 100 includes a battery module 10 having a smoke exhaust structure, and includes: a lower mica sheet 40 placed on the upper surface of the battery module 10; a wire harness 30 placed on the upper surface of the lower mica sheet 40; and an upper mica sheet 50 placed on the upper surface of the wire harness 30. The inside of the battery pack 100 of the wire harness 30 is covered by at least one of the upper mica sheet 50 and the lower mica sheet 40.SELECTED DRAWING: Figure 2

Description

Technical Field

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

Background Art

[0002] In a battery pack including a battery module, a technique of protecting the battery module with a mica sheet is known. For example, Patent Document 1 discloses a battery pack including a plurality of mica sheets that cover electrode terminals and a bus bar.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The inventors have found the following problems regarding the battery pack. When a smoke exhaust structure is provided in the battery module, there is a risk that surrounding members will be affected by the exhausted gas. Therefore, in the technique disclosed in Patent Document 1, the influence of the exhausted gas is suppressed by flowing the exhausted gas to the mica sheet side using a smoke exhaust cover. The voltage / temperature detection line, that is, the wire harness, attached to the battery module may be arranged in the path of the exhausted gas. In this case, the wire harness is liable to be thermally affected by the exhausted gas. Therefore, a technique for further suppressing the thermal influence of the exhausted gas on the wire harness has been demanded.

[0005] The present disclosure has been made in view of such problems, and an object thereof is to provide a battery pack that further suppresses the thermal influence of the exhausted gas on the wire harness.

Means for Solving the Problems

[0006] One aspect for achieving the above object is a battery pack including a battery module having a smoke exhaust structure, a lower mica sheet placed on the upper surface of the battery module, a wire harness placed on the upper surface of the lower mica sheet, and an upper mica sheet placed on the upper surface of the wire harness, wherein the inside of the wire harness in the battery pack is covered by at least one of the upper mica sheet and the lower mica sheet.

Advantages of the Invention

[0007] According to the present disclosure, it is possible to provide a battery pack that further suppresses the thermal influence of the exhausted gas on the wire harness.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In each drawing, the same or corresponding elements are denoted by the same reference numerals, and redundant descriptions are omitted as necessary for clarity of explanation. Also, for ease of understanding, the scales of the respective parts in the drawings may be different from the actual ones.

[0010] Referring to FIGS. 1 and 2, the configuration of the battery pack 100 according to the present embodiment will be described. The battery pack 100 is a battery pack having a smoke exhaust structure. The battery pack 100 is a rechargeable battery, that is, a secondary battery. The battery pack 100 is mounted on a vehicle equipped with a driving motor, such as an HEV (Hybrid Electric Vehicle), a PHV (Plug-in Hybrid Electric Vehicle), an FCV (Fuel Cell Electric Vehicle), or an EV (Electric Vehicle), and is used as a power supply source for supplying power to the driving motor.

[0011] FIG. 1 is a partial perspective schematic view of the battery pack according to the present embodiment. FIG. 2 is a partial enlarged cross-sectional view taken along line II-II of FIG. 1. As shown in FIG. 2, the battery pack 100 includes a battery module 10, a housing 20, a wire harness 30, a lower mica sheet 40, and an upper mica sheet 50. As shown in FIG. 1, usually, the battery pack 100 further includes an SBM (Satellite Battery Module) 60.

[0012] The battery module 10 includes a plurality of battery cells. The housing 20 is a container for storing each component included in the battery pack 100. The wire harness 30 is a wire for measuring temperature and pressure. As shown in FIG. 1, the wire harness 30 is provided so as to connect the battery module 10 and the SBM 60. As shown in FIG. 1, the wire harness 30 is disposed on the upper surface of the battery module 10 and extends along the edge of the battery module 10. Note that the arrangement location and shape of the wire harness 30 shown in FIG. 1 are merely examples and may be changed as appropriate.

[0013] The lower mica sheet 40 is a sheet placed on the upper surface of the battery module 10. The lower mica sheet 40 protects the battery module 10. In FIG. 2, the left side is the inside of the battery pack 100, and the right side is the outside of the battery pack 100. As shown in FIG. 2, the lower mica sheet 40 may be provided so as to protrude, for example, from the inside of the battery pack 100 to the outside of the battery pack 100 of the wire harness 30.

[0014] The upper mica sheet 50 is a sheet placed on the upper surface of the wire harness 30. As shown in FIG. 2, the upper mica sheet 50 may be provided so as to protrude, for example, from the inside of the battery pack 100 to the outside of the battery pack 100 of the wire harness 30. As shown in FIG. 2, the lower mica sheet 40 and the upper mica sheet 50 may be provided so as to be aligned inside the battery pack 100.

[0015] The arrow shown in FIG. 2 indicates the flow of the gas to be exhausted. As shown in FIG. 2, the gas flows from the inside to the outside of the battery pack 100. By covering at least one of the lower mica sheet 40 and the upper mica sheet 50 the inside of the battery pack 100 of the wire harness 30 as shown in FIG. 2, the wire harness 30 is protected from the heat and debris of the exhausted gas. Also, as shown in FIG. 2, from the viewpoint of reducing the amount of mica sheet used, it is preferable that the inside of the battery pack 100 of the wire harness 30 is not covered by the lower mica sheet 40 and the upper mica sheet 50.

[0016] Since the battery pack 100 protects the wire harness 30 with a mica sheet, it is possible to suppress the occurrence of a short circuit in the wire harness 30 and the occurrence of chain smoking when thermal runaway occurs. In addition, since the battery pack 100 arranges the wire harness 30 on the battery module 10, the lateral width of the battery pack 100 can be reduced as compared with the case where the wire harness 30 is arranged beside the battery pack 100. Therefore, the energy density of the battery pack 100 is improved, and the competitiveness of the product is improved. Further, since the mica sheet that protects the wire harness 30 is arranged on the battery module 10 in the battery pack 100, the local input to the upper surface of the battery cell included in the battery module 10 is dispersed, and the input resistance to the cell upper surface is improved.

[0017] Note that the present disclosure is not limited to the above-described embodiments, and can be appropriately changed without departing from the gist.

Description of Reference Numerals

[0018] 10 Battery module 20 Housing 30 Wire harness 40 Lower mica sheet 50 Upper mica sheet 60 SBM 100 Battery pack

Claims

**Claim 1** A battery pack comprising a battery module having a smoke exhaust structure, a lower mica sheet placed on the upper surface of the battery module, a wire harness placed on the upper surface of the lower mica sheet, and an upper mica sheet placed on the upper surface of the wire harness, wherein the inside of the wire harness in the battery pack is covered by at least one of the upper mica sheet and the lower mica sheet, a battery pack. **Claim 2** The outside of the wire harness in the battery pack is not covered by the upper mica sheet and the lower mica sheet, The battery pack according to claim 1.

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