JP-7856446-B2 - Busbars and busbar modules

JP7856446B2JP 7856446 B2JP7856446 B2JP 7856446B2JP-7856446-B2

Inventors

市川喜章
小泉航路
安田知司

Assignees

矢崎総業株式会社

Dates

Publication Date: 20260511
Application Date: 20220216

Claims (4)

A busbar body that is electrically connected to the electrode terminals of the battery cell, A busbar connection portion is formed protruding from the busbar body, to which one end of a voltage detection conductor that outputs voltage information to the outside is electrically connected, Equipped with, The busbar body is formed by stacking conductive plate-shaped conductive members in the vertical direction, The conductive member comprises an upper conductive member located above in the vertical direction and a lower conductive member located below the upper conductive member. The upper conductive member and the lower conductive member are electrically connected by being fixed to each other at the joint. The lower conductive member is electrically connected to the electrode terminal, The upper conductive member has the busbar connection portion corresponding to the voltage detection conductor, The busbar connection portion protrudes horizontally from the periphery of the busbar body and is directly electrically connected to the circuit pattern of the flexible printed circuit board which is the voltage detection conductor. Bus bar.
A busbar body that is electrically connected to the electrode terminals of the battery cell, A busbar connection portion is formed protruding from the busbar body, to which one end of a voltage detection conductor that outputs voltage information to the outside is electrically connected, Equipped with, The busbar body is formed by stacking conductive plate-shaped conductive members in the vertical direction, The conductive member comprises an upper conductive member located above in the vertical direction and a lower conductive member located below the upper conductive member. The upper conductive member and the lower conductive member are electrically connected by being fixed to each other at the joint. The lower conductive member is electrically connected to the electrode terminal, The upper conductive member has the busbar connection portion corresponding to the voltage detection conductor, The upper conductive member has a slit, The busbar connection portion is provided adjacent to the slit, and a part of the upper conductive member is formed by bending upward, so that the circuit pattern of the flexible printed circuit board, which is the voltage detection conductor, is directly electrically connected. Bus bar.
Multiple busbars connected to two or more electrode terminals of a row of electrode terminals in a battery module consisting of multiple battery cells arranged along the direction of arrangement, Each of the busbars is connected to a plurality of voltage detection conductors, It has at least the following features: The aforementioned busbar is A busbar body electrically connected to the electrode terminals, A busbar connection portion is formed protruding from the busbar body, to which one end of the voltage detection conductor that outputs voltage information to the outside is electrically connected, Equipped with, The busbar body is formed by stacking conductive plate-shaped conductive members in the vertical direction, The conductive member comprises an upper conductive member located above in the vertical direction and a lower conductive member located below the upper conductive member. The upper conductive member and the lower conductive member are electrically connected by being fixed to each other at the joint. The lower conductive member is electrically connected to the electrode terminal, The upper conductive member has the busbar connection portion corresponding to the voltage detection conductor, The busbar connection portion protrudes horizontally from the periphery of the busbar body and is directly electrically connected to the circuit pattern of the flexible printed circuit board which is the voltage detection conductor. Busbar module.
Multiple busbars connected to two or more electrode terminals of a row of electrode terminals in a battery module consisting of multiple battery cells arranged along the direction of arrangement, Each of the busbars is connected to a plurality of voltage detection conductors, It has at least the following features: The aforementioned busbar is A busbar body electrically connected to the electrode terminals, A busbar connection portion is formed protruding from the busbar body, to which one end of the voltage detection conductor that outputs voltage information to the outside is electrically connected, Equipped with, The busbar body is formed by stacking conductive plate-shaped conductive members in the vertical direction, The conductive member comprises an upper conductive member located above in the vertical direction and a lower conductive member located below the upper conductive member. The upper conductive member and the lower conductive member are electrically connected by being fixed to each other at the joint. The lower conductive member is electrically connected to the electrode terminal, The upper conductive member has the busbar connection portion corresponding to the voltage detection conductor, The upper conductive member has a slit, The busbar connection portion is provided adjacent to the slit, and a part of the upper conductive member is formed by bending upward, so that the circuit pattern of the flexible printed circuit board, which is the voltage detection conductor, is directly electrically connected. Busbar module.

Description

This invention relates to busbars and busbar modules. A busbar module is used in a battery module that is constructed by connecting multiple battery cells. In a busbar module, where multiple battery cells are arranged in the array direction, the module comprises, for example, multiple busbars connecting adjacent battery cells in series, and voltage sensing conductors electrically connected to each busbar. The busbar is made of a conductive metal and consists of a single plate-like member. Some busbar modules use electric wires as voltage sensing conductors (see, for example, Patent Document 1). Furthermore, some busbar modules use flexible printed circuits as voltage sensing conductors (see, for example, Patent Document 2). When using an electric wire as a voltage detection conductor, one end of the wire was electrically connected to the busbar connection for wire connection, for example, by crimping. On the other hand, when a flexible circuit board is used as the voltage detection conductor, the circuit pattern of the flexible circuit board is electrically connected to the busbar connection portion for the flexible circuit board, for example, by soldering. Japanese Patent Publication No. 2016-091772Japanese Patent Publication No. 2014-086246 Figure 1 is a perspective view of a busbar module according to the first embodiment.Figure 2 is a plan view of the busbar according to the first embodiment.Figure 3 is a perspective view of the busbar according to the first embodiment.Figure 4 is a cross-sectional view taken along the line A-A in Figure 2.Figure 5 is a cross-sectional view taken along the line B-B in Figure 2.Figure 6 is a perspective view of a busbar according to a first modified example of the first embodiment.Figure 7 is a perspective view of the busbar according to the second embodiment.Figure 8 is a plan view of the busbar according to the second embodiment.Figure 9 is a perspective view of the busbar according to the third embodiment. The following describes embodiments of the busbar and busbar module according to the present invention with reference to the drawings. However, the present invention is not limited by these embodiments. Furthermore, the components in the following embodiments include those that are readily conceivable to those skilled in the art or that are substantially identical. [First Embodiment] Figure 1 is a perspective view of the busbar module 1 according to the first embodiment. Figure 2 is a plan view of the busbar 2 according to the first embodiment. Figure 3 is a perspective view of the busbar 2 according to the first embodiment. Figure 4 is a cross-sectional view taken along the line A-A in Figure 2. Figure 5 is a cross-sectional view taken along the line B-B in Figure 2. Note that in Figure 4, the details of the flexible printed circuit board 40 are omitted. In Figures 1 to 5, X indicates the arrangement direction X of the battery cells 101 in the busbar module 1. Y indicates the orthogonal direction Y, which is perpendicular to the arrangement direction X of the busbar module 1. Z indicates the vertical direction Z of the busbar 2 and busbar module 1. In this embodiment, the busbar 2 and busbar module 1 have the electrode terminals 103 side of the battery cells 101 facing downwards, and the direction opposite to downwards in the vertical direction Z is facing upwards. Furthermore, in this embodiment, the arrangement direction X, the orthogonal direction Y, and the vertical direction Z are mutually orthogonal to each other. In this embodiment, the busbar module 1 is assembled to the battery module 100, as shown in Figure 1. The battery module 100 is constructed by arranging multiple battery cells 101, such as secondary batteries, in the arrangement direction X, and modularizing them. The battery module 100 is used, for example, in electric vehicles (EVs) and hybrid vehicles (HVs, PHVs) to supply power to a rotating electric machine that is a drive source, or to store (charge) the power generated by the rotating electric machine. The battery module 100 enables high output to be obtained to meet the vehicle's requirements by, for example, connecting multiple battery cells 101 in series. Each battery cell 101 has a cell body 102 and two electrode terminals 103. The cell body 102 is the main part that constitutes the battery cell 101 and is formed, for example, in a substantially rectangular parallelepiped shape. The multiple electrode terminals 103 are provided in a state that is exposed to the outside relative to the cell body 102. Each battery cell 101 has, for example, a pair of electrode terminals 103 at both ends in the orthogonal direction Y. Of the pair of electrode terminals 103, the electrode terminal 103 located on one side in the orthogonal direction Y is the positive electrode terminal, and the electrode terminal 103 located on the other side in the orthogonal direction Y is the negative electrode terminal. In this embodiment, the multiple battery cells 101 ar