Secondary batteries

Abstract

The present invention provides a method for manufacturing a bipolar battery and an apparatus for manufacturing a bipolar battery that can optimize the moisture content of the electrode coating. [Solution] The secondary battery 1 comprises a plurality of battery cells 10, a bus bar 20 that electrically connects each of the plurality of battery cells 10, and a cooling member 30 that forms a cooling channel K1 on the bus bar 20, the bus bar 20 having a groove on its upper surface.

Description

Technical Field

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

Background Art

[0002] Patent Document 1 discloses a technique for cooling each of a plurality of batteries by providing a cooling plate that contacts a bus bar for electrically connecting the plurality of batteries.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in Patent Document 1 described above, since a cooling plate is provided separately, the secondary battery becomes large-sized, and there is room for improvement.

[0005] The present disclosure has been made in view of the above, and an object thereof is to provide a secondary battery capable of miniaturization and improved cooling performance.

Means for Solving the Problems

[0006] The secondary battery according to the present disclosure includes a plurality of battery cells, a bus bar that electrically connects each of the plurality of battery cells, and a cooling member that forms a cooling flow path on the bus bar, and the bus bar has a groove portion on an upper surface.

Effects of the Invention

[0007] According to the present disclosure, there is an effect that miniaturization and cooling performance can be improved.

Brief Description of the Drawings

[0008] [Figure 1] Figure 1 is a front view of a secondary battery according to one embodiment. [Figure 2] Figure 2 is a side view of a secondary battery according to one embodiment. [Figure 3] Figure 3 is a top view of a secondary battery according to one embodiment. [Figure 4] Figure 4 is a cross-sectional view taken along line AA in Figure 2. [Figure 5] Figure 5 is a cross-sectional view along line BB in Figure 3. [Modes for carrying out the invention]

[0009] The secondary battery according to the embodiments of this disclosure will be described below with reference to the drawings. Note that the components in the following embodiments include those that are easily substituted or substantially identical to those that can be substituted by a person skilled in the art.

[0010] [Overall configuration of a secondary battery] Figure 1 is a front view of a secondary battery according to one embodiment. Figure 2 is a side view of a secondary battery according to one embodiment. Figure 3 is a top view of a secondary battery according to one embodiment. Figure 4 is a cross-sectional view taken along line AA in Figure 2. Figure 5 is a cross-sectional view taken along line BB in Figure 3.

[0011] The secondary battery 1 (battery module) shown in Figures 1 to 5 comprises a plurality of battery cells 10, a busbar 20 that electrically connects each of the plurality of battery cells 10, and a cooling member 30 that forms a cooling channel K1 on the busbar 20.

[0012] Each of the multiple battery cells 10 is roughly rectangular in shape and consists of rechargeable batteries such as lithium-ion batteries, nickel-metal hydride batteries, and nickel-cadmium batteries. Each battery cell 10 has a positive or negative terminal 11 protruding from its upper surface.

[0013] The busbar 20 is constructed from a plate-shaped member containing a conductive material, such as aluminum. The busbar 20 has grooves 21 on its upper surface. The grooves 21 are formed along the cooling channel K1. Specifically, the busbar 20 has multiple notched grooves formed along the short direction perpendicular to the longitudinal direction of the battery cell 10. This allows the busbar 20 to increase its cooling surface area and improve its cooling performance.

[0014] The cooling member 30 is concave (C-shaped) so as to sandwich the busbar 20, and the upper and inner surfaces of the busbar 20 form a cooling channel K1 through which an insulating refrigerant supplied from the outside flows. The cooling member 30 is formed along the short direction perpendicular to the longitudinal direction of the battery cell 10. The cooling member 30 is made of an insulating material. This allows the busbar 20 to be insulated from other devices.

[0015] According to the embodiment described above, by providing a cooling member 30 that forms a cooling channel K1 on a bus bar 20 that electrically connects each of the multiple battery cells 10, and by forming a groove 21 on the upper surface of the bus bar 20, miniaturization and cooling performance can be improved.

[0016] Furthermore, according to one embodiment, the busbar 20 has grooves 21 formed by multiple notches along the short direction perpendicular to the longitudinal direction of the battery cell 10, thereby increasing the cooling surface area of ​​the battery cell 10 and improving cooling performance.

[0017] Further effects and modifications can be readily derived by those skilled in the art. Therefore, broader aspects of the present invention are not limited to the specific details and representative embodiments expressed and described above. Accordingly, various modifications are possible without departing from the spirit or scope of the overall concept of the invention as defined by the appended claims and their equivalents. [Explanation of symbols]

[0018] 1 Secondary battery 10 Battery cell 11 Terminal 20 Bus bar 21 Groove portion 30 Cooling member K1 Cooling flow path

Claims

1. Multiple battery cells, A busbar electrically connects each of the aforementioned plurality of battery cells, A cooling member that forms a cooling channel on the busbar, Equipped with, The aforementioned busbar is Having a groove on the upper surface, Secondary battery.

2. A secondary battery according to claim 1, The groove portion is It is formed along the aforementioned cooling channel, The cooling member is Made of insulating material, Secondary battery.

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