Battery module which reduces noise on a signal line
View Patent ↗A battery module is provided in which a signal line is prevented from the influence of noise caused by an internal current output line. A battery module includes: a plurality of cells 100 ; a current conduction member 34 electrically connecting electrode terminals of the plurality of cells; and a signal line 50 configured to measure capacitance of the plurality of cells, wherein the current conduction member includes a parallel section including two members which are opposite in direction of a current flowing therethrough and are arranged substantially parallel to each other, and a connection section electrically connecting the two members at one end of the parallel section, and the signal line is arranged nearly equidistant from the two members, and extends substantially parallel to the two members to approach the connection section.
1. A battery module comprising:
a plurality of cells;
a plurality of battery blocks each including at least two of the plurality of cells accommodated in a container, the battery module including the plurality of battery blocks housed in a case,
a connection member made of a metal plate electrically connecting electrode terminals of the same polarity of the plurality of cells in the respective battery blocks; and
a signal line, wherein
the plurality of battery blocks are arranged in a pair to face each other, in each pair of battery blocks, the electrode terminals of the same polarity of respective cells of the battery blocks are arranged to face one another,
the connection members of the pair of battery blocks serve as a parallel section in which the connection members are opposite in direction of a current flowing therethrough, and are arranged substantially parallel to each other, and the pair of battery blocks are electrically connected to each other at one end of the parallel section by a connection section,
the signal line is arranged nearly equidistant from the connection members while being interposed in a space between the respective connection members of the pair of the battery blocks, and is arranged substantially parallel to the connection members,
one end of the signal line is arranged in a position away from the connection section in a direction toward the other end of the parallel section, and
the space forming a duct for exhausting a gas emitted from the plurality of cells of each pair of battery blocks.
2. The battery module of claim 1 , wherein
the connection members forming the parallel section consist of 2n pieces, n being an integer greater than or equal to 1, which are opposite in direction of a current flowing therethrough, and are arranged substantially parallel to each other,
the signal line is arranged nearly equidistant from the 2n pieces which are arranged in pairs to be substantially parallel to each other and to face each other, and
the signal line extends substantially parallel to the 2n pieces arranged in pairs.
3. A battery module including a plurality of cells which are columnar secondary batteries, and are accommodated in a metal case, the battery module comprising:
a plurality of battery blocks connected to each other in series, wherein
a first electrode terminal and a second electrode terminal are arranged respectively on an upper surface and a lower surface of each of the columnar cells,
the battery blocks each include at least two of the plurality of cells connected to each other in parallel, where the cells are aligned with side surfaces of the cells being adjacent to each other to align the upper surfaces on a same side, and the battery blocks adjacent to each other are connected via a series connection member,
the battery blocks each include a first connection member which is made of a metal plate and arranged to face the upper surfaces of the cells to electrically connect the first electrode terminals to each other, and a second connection member which is made of a metal plate and arranged to face the lower surfaces of the cells to electrically connect the second electrode terminals to each other,
the plurality of battery blocks are grouped into two groups in each of which the battery blocks are arranged with the first connection members being aligned in a line,
the groups are arranged to face each other, and are electrically connected to each other at ends of the two groups via a connection section on one side, in each group of battery blocks, the electrode terminals of the same polarity of respective cells of the groups are arranged to face one another,
a signal line is arranged nearly equidistant from the first connection members while being interposed in a space formed between the first connection members of the battery blocks of the two groups facing each other,
one end of the signal line is arranged at a position away from the connection section in a direction toward ends of the first connection members on the other side,
the space forming a duct for exhausting a gas emitted from the plurality of cells of each pair of battery blocks.