JP2010061962A - Terminal structure of secondary battery, secondary battery, and secondary battery module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide: a terminal structure of a secondary battery, which can easily connect with an adjacent secondary battery; a secondary battery; and a secondary battery module. <P>SOLUTION: The secondary battery 2 includes a positive electrode 3 and a negative electrode terminal 5, and the positive electrode 3 and the negative electrode terminal 5 each have connector sections 30. A bus bar 6 has mating connector sections 61 connected with the connector section 30 on both ends via a body 60. The secondary batteries 2 are arranged to be the positive electrode terminal 3 and the negative electrode terminal 5 which are neighboring each other, and are connected with the bus bar 6 in order form a battery module 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a terminal structure of a secondary battery, a secondary battery, and a secondary battery module.

  As a conventional technique, a battery module including a unit battery having a terminal provided with a connection portion and a connecting tool that connects adjacent terminals of the unit battery is known (see, for example, Patent Document 1). .

According to this battery module, since the coupling tool can be easily attached to the terminal connection portion, a plurality of unit batteries can be easily coupled.
JP 2008-71733 A

  However, the conventional battery module has to be connected to a terminal with a bolt, and the work efficiency is not good.

  Therefore, the objective of this invention is providing the terminal structure of a secondary battery, a secondary battery, and a secondary battery module which can connect an adjacent secondary battery easily.

(1) In order to achieve the above object, the present invention is formed of an insulating member, and is electrically connected to an insulating portion provided in the secondary battery body and a power generation element housed in the secondary battery body. Provided is a secondary battery terminal structure including an electrode part and a connector part electrically connected to the electrode part.

(2) In order to achieve the above object, in the present invention, the connector portion is adjacent to each other by the first mating connector portion to be connected and the connecting portion to which the second mating connector portion is electrically connected. The terminal structure of the secondary battery according to (1), wherein the secondary battery is electrically connected, is provided.

(3) In order to achieve the above object, the present invention provides the terminal structure of the secondary battery according to (2), wherein the connection part is provided in a housing part that houses the plurality of secondary batteries.

(4) In order to achieve the above object, the present invention provides the terminal structure of the secondary battery according to (2), wherein the connecting portion is provided on a lid of a housing portion that houses the plurality of secondary batteries. .

(5) In order to achieve the above object, the present invention is formed of an insulating member, and is electrically connected to an insulating portion provided in the secondary battery body and a power generation element housed in the secondary battery body. Provided is a secondary battery comprising at least one terminal structure having an electrode part and a connector part electrically connected to the electrode part.

(6) In order to achieve the above object, in the present invention, the connector portion is adjacent to each other by the first mating connector portion to be connected and the connecting portion to which the second mating connector portion is electrically connected. The secondary battery according to (5), wherein the secondary battery is electrically connected, is provided.

(7) In order to achieve the above object, the present invention provides the secondary battery according to (6), wherein the connection portion is provided in a housing portion that houses the plurality of secondary batteries.

(8) In order to achieve the above object, the present invention provides the secondary battery according to (6), wherein the connecting portion is provided on a lid of a housing portion that houses the plurality of secondary batteries.

(9) In order to achieve the above object, the present invention is formed of an insulating member, and is electrically connected to an insulating portion provided in the secondary battery body and a power generation element housed in the secondary battery body. A plurality of secondary batteries having at least one terminal structure having an electrode part and a connector part electrically connected to the electrode part; a first mating connector part connected to the connector part; and A second battery connector module, wherein the second mating connector portion is electrically connected to the second mating connector portion, and the connecting portion provides a secondary battery module provided in a housing portion that houses the plurality of secondary batteries.

(10) In order to achieve the above object, the present invention is formed of an insulating member, and is electrically connected to an insulating portion provided in the secondary battery body and a power generation element housed in the secondary battery body. A plurality of secondary batteries having at least one terminal structure having an electrode part and a connector part electrically connected to the electrode part; a first mating connector part connected to the connector part; and A second battery connector module, the second mating connector portion being electrically connected to the second mating connector portion, wherein the second connecting connector portion provides a secondary battery module provided on a lid of a housing portion that houses the plurality of secondary batteries.

  According to such an invention, adjacent secondary batteries can be easily connected.

  Hereinafter, embodiments of a terminal structure of a secondary battery, a secondary battery, and a secondary battery module according to the present invention will be described in detail with reference to the drawings.

[First embodiment]
(Battery module configuration)
FIG. 1 is a perspective view of the battery module according to the first embodiment of the present invention. The battery module (secondary battery module) 1 has a terminal structure according to the present invention on the positive electrode terminal 3 and negative electrode terminal 5 sides, and is configured by connecting the plurality of secondary batteries 2 in series. In the present embodiment, as an example, one secondary battery module 1 is manufactured by connecting six secondary batteries 2 in series.

  The battery module 1 is configured by electrically connecting adjacent secondary batteries 2 via a bus bar (connecting portion) 6 described later.

  The connection by the bus bar 6 is performed by connecting different adjacent electrodes, that is, the positive electrode terminal 3 and the negative electrode terminal 5.

(Configuration of secondary battery)
2A is a cross-sectional view of the positive electrode terminal before connection with the bus bar according to the first embodiment of the present invention, taken along line AA in FIG. 1, and FIG. 2B is after connection with the bus bar. FIG. 3 is a side view of the positive electrode terminal of FIG. 1 from the direction of arrow B, and FIG. 3 is the AA line of FIG. 1 of the positive electrode terminal after connection with the bus bar according to the first embodiment of the present invention. It is sectional drawing.

  The secondary battery 2 is a storage battery that can be repeatedly used by charging. As an example, a power generation element in which a separator as an insulator is interposed between a strip-like positive electrode and a negative electrode and stacked. A main body (secondary battery main body) 20 that accommodates the electrode group as the inside, a positive electrode terminal 3 constituting the terminal structure of the present invention, a plate (insulating portion) 4 formed by an insulating member, and a negative electrode terminal 5 And is schematically configured.

(Configuration of positive electrode terminal)
As shown in FIG. 2A, the positive electrode terminal 3 is schematically configured to include a connector portion 30 and a positive electrode plate (electrode portion) 31 connected to the positive electrode side of the power generation element.

  The connector section 30 is provided on the side surface of the opening 301 as shown in FIG. 2B, and the connector body 300 made of resin, the opening 301 formed in the upper portion of the connector body 300, and A claw portion 302 that is displaced outward by the connection of a bus bar 6 described later is schematically configured.

  The positive electrode plate 31 is formed of a conductive metal and is provided so as to protrude into the opening 301 of the connector main body 300 through the opening 40 provided in the plate 4.

  The positive electrode plate 31 is roughly configured to include a curved portion 310 that bends in a substantially square shape in the vicinity of the opening 40 and a tip portion 311 that protrudes into the opening 301. This curved portion 310 is used to secure a sufficient contact point with the mating connector portion 61 when the distal end portion 311 is pushed into the main body 20 side by insertion of the mating connector portion 61 when connected to the mating connector portion 61. belongs to.

  The negative electrode terminal 5 has the same configuration and function as the positive electrode terminal 3 except that the negative electrode terminal 5 is connected to the negative electrode side of the power generation element. The connection will be mainly described.

(Bus bar configuration)
The bus bar 6 is made of resin, and is provided with mating connector portions (first and second mating connector portions) 61 at both ends separated by a predetermined distance via the main body 60. The mating connector portions 61 provided at both ends of the main body 60 are electrically connected by a conductor 63 provided in the main body 60. The predetermined distance is determined depending on the interval between the secondary batteries 2 arranged.

  As shown in FIG. 2A, the bus bar 6 includes a main body 60, a mating connector portion 61, an opening 62 provided in a lower portion of the mating connector portion 61, a conductor 63, and a conductor 63 in the opening 62. Are provided on the folded portion 64 that is the folded portion, the inner surface portion of the opening 62 facing the folded portion 64, and at a position corresponding to the protrusion 65 projecting into the opening 62 and the claw portion 302 of the connector portion 30. And a recessed portion 66 provided.

  As shown in FIG. 1, the bus bar 6 has a mating connector at a position facing the mating connector portion 61 via the main body 60, and the mating connector portion has the same function and configuration as the mating connector portion 61. Therefore, the description is omitted below.

(Operation)
Hereinafter, operations related to the connection of the secondary battery in the present embodiment will be described in detail with reference to the drawings.

  As shown in FIG. 1, the worker arranges the secondary batteries 2 at a predetermined interval. At this time, the adjacent positive electrode terminal 3 and the negative electrode terminal 5 are arranged so as to have different poles, that is, the positive electrode terminal 3 and the negative electrode terminal 5 are adjacent to each other.

  Subsequently, the operator inserts the mating connector portion 61 of the bus bar 6 into each opening 301 of the positive electrode terminal 3 and the negative electrode terminal 5.

  The tip portion 311 of the positive electrode plate 31 of the positive electrode terminal 3 first contacts the folded portion 64 of the mating connector portion 61 and opposes the folded portion 64 while elastically deforming the folded portion 64 toward the inner wall side of the opening 62. The convex part 65 in position is contacted.

  At this time, the distal end portion of the mating connector portion 61 contacts the claw portion 302 provided in the opening 301 of the positive electrode terminal 3, and the claw portion 302 is displaced outward of the opening 301, and the mating connector portion 61. Touch the side of the.

  As shown in FIG. 3, when the mating connector portion 61 is completely inserted into the opening 301 of the positive electrode terminal 3, the claw portion 302 that has been in contact with the side surface portion fits into the recess 66 of the mating connector portion 61, The connection between the mating connector part 61 and the connector part 30 is completed.

  The negative electrode terminal 5 is connected to the mating connector portion and the connector portion in the same manner as described above.

  The worker performs the above operation on all adjacent secondary batteries 2 to produce the battery module 1.

(effect)
(1) According to the secondary battery 2 in the above-described embodiment, since the secondary battery 2 and the bus bar 6 are connected using the connector, the working efficiency is improved.

(2) According to the secondary battery 2 in the above-described embodiment, the secondary battery 2 and the bus bar 6 can be reliably connected with a simple configuration.

[Second Embodiment]
(Constitution)
FIG. 4 is an exploded perspective view of the battery module according to the second embodiment of the present invention. The battery module 1 </ b> A according to the present embodiment includes a case 7 including an upper case (container) 70 and a lower case 71, and the case 7 is formed on the inner side of the upper case 70 based on the width of the secondary battery 2. The guide portion 700 is generally configured. Since the negative electrode terminal 5 has the same configuration as the positive electrode terminal 3, the connector portion of the negative electrode terminal 5 is assumed to be a connector portion 30.

  The upper case 70 is provided in the upper part so that the same bus bar 6 as in the first embodiment can be connected to the adjacent secondary batteries 2.

  As an example, the end connector 600 is fixed to an opening (not shown) of the upper case 70, and is electrically connected to a positive electrode side connector (not shown) on the upper surface of the upper case 70. . Similarly, the connector (not shown) at one end is electrically connected to the connector on the negative electrode side (not shown) on the upper surface.

(Operation)
As an example, the worker installs the upper case 70 so that the upper surface portion is at the lower portion, and inserts the secondary battery 2 into the upper case 70 along the guide portion 700 with the electrode side facing down.

  When the worker stores a predetermined number of secondary batteries 2 in the upper case 70, the lower case 71 is fixed to the upper case 70, the case 7 is raised so that the upper surface portion is at the top, and the case 7 is produced. finish.

(effect)
According to the battery module 1A in the second embodiment described above, the bus bar 6 is provided in the upper case 70, and the insertion of the secondary battery 2 is guided by the guide portion 700. It can be connected to the positive electrode terminal 3 and the negative electrode terminal 5, and the working efficiency is improved.

[Third embodiment]
(Constitution)
FIG. 5 is an exploded perspective view of the battery module according to the third embodiment of the present invention. The battery module 1B in the present embodiment is schematically configured with a case 7 having the same configuration as that of the second embodiment.

  As shown in FIG. 5, the upper case 70 is provided at the top so that the bus bar 6 </ b> A can connect the adjacent secondary batteries 2.

  As an example, the bus bar 6A is formed in a rectangular shape by a conductive member, and a concave portion 60A extending in the longitudinal direction is formed in the central portion.

  As shown in FIG. 5, the secondary battery 2A includes a main body 20A, a positive electrode terminal 3A, and a negative electrode terminal 5A. The positive electrode terminal 3A has conductivity based on the shape of the recess 60A of the bus bar 6A. The negative electrode terminal 5A includes a terminal (connector portion) 50A made of a member having the same shape as the terminal 30A, and the bus bar 6A includes first and second terminals 30A. It is comprised so that it may function as the other party connector.

  The end connector 600A has a shape based on the bus bar 6A. As an example, the end connector 600A is fixed to an opening (not shown) of the upper case 70 as in the second embodiment. It is assumed that the upper surface portion is electrically connected to a positive electrode side connector (not shown). Similarly, the connector (not shown) at one end is electrically connected to the connector on the negative electrode side (not shown) on the upper surface.

(Operation)
As an example, the worker installs the upper case 70 so that the upper surface portion is at the lower portion, and inserts the secondary battery 2A into the upper case 70 along the guide portion 700 with the electrode side facing down.

  When the worker houses a predetermined number of secondary batteries 2A in the upper case 70, the lower case 71 is fixed to the upper case 70, the case 7 is raised so that the upper surface portion is at the top, and the case 7 is produced. finish.

(effect)
According to the battery module 1A in the third embodiment described above, the upper case 70 is provided with the bus bar 6A as the first and second mating connectors, and the secondary battery 2A is inserted by the guide portion 700. Since it is guided, the bus bar 6A can be accurately connected to the terminal 30A and the terminal 50A as the connector portions, and the working efficiency is improved.

[Fourth embodiment]
(Constitution)
FIG. 6 is an exploded perspective view of the battery module according to the fourth embodiment of the present invention. The battery module 1C in the present embodiment is schematically configured to include an upper case 70A as a lid and a lower case 71A that can accommodate a plurality of secondary batteries 2.

  As shown in FIG. 6, the upper case 70 </ b> A is provided at the top so that the bus bar 6 can connect the adjacent secondary batteries 2.

  As an example, the end connector 600B is fixed to an opening (not shown) of the upper case 70A as in the second embodiment, and is connected to a positive electrode side connector (not shown) on the upper surface of the upper case 70A. Connected. Similarly, the connector (not shown) at one end is electrically connected to the connector on the negative electrode side (not shown) on the upper surface.

(Operation)
An operator inserts the secondary battery 2 into the lower case 71A along a guide portion (not shown).

  When the worker houses a predetermined number of secondary batteries 2 in the lower case 71A, the bus bar 6 fixes the upper case 70A to the lower case 71A so that the bus bar 6 is connected to the positive electrode terminal 3 and the negative electrode terminal 5, and the case 7A The production is finished.

(effect)
According to the battery module 1C in the fourth embodiment described above, the upper case 70A is provided with the bus bar 6, and the lower case 71A is provided with the guide portion, and the secondary battery 2 is inserted by the guide portion. Since it is guided, the bus bar 6 can be accurately connected to the positive electrode terminal 3 and the negative electrode terminal 5, and the working efficiency is improved.

(About other embodiments)
In the above-described embodiment, the bus bars 6 and 6A are provided in the upper cases 70 and 70A. May be.

  For example, when the positive electrode terminal 3 and the negative electrode terminal 5 are provided on the side surface portion in the short side direction, the corresponding side surface portion of the cases 7 and 7A may be an upper case, and the bus bar may be provided inside thereof.

  In the above-described embodiment, the secondary batteries 2 and 2A have the terminal structure of the present invention at both the positive electrode terminals 3 and 3A and the negative electrode terminals 5 and 5A. However, the present invention is not limited to this. The battery modules 1, 1A, 1B, or 1C may be configured to electrically connect secondary batteries having at least one terminal structure to each other via the corresponding bus bar 6 or bus bar 6A. May be combined.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from or changing the technical idea of the present invention.

It is a perspective view of the battery module which concerns on the 1st Embodiment of this invention. (A) is the sectional view on the AA line of FIG. 1 of the positive electrode terminal before the connection with the bus bar according to the first embodiment of the present invention, and (b) is the positive electrode terminal after the connection with the bus bar. It is a side view from the arrow B direction of FIG. 1 of an electrode terminal. It is the sectional view on the AA line of FIG. 1 of the positive electrode terminal after connection with the bus-bar which concerns on the 1st Embodiment of this invention. It is a disassembled perspective view of the battery module which concerns on the 2nd Embodiment of this invention. It is a disassembled perspective view of the battery module which concerns on the 3rd Embodiment of this invention. It is a disassembled perspective view of the battery module which concerns on the 4th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A, 1B, 1C ... Battery module, 2, 2A ... Secondary battery, 3, 3A ... Positive electrode terminal, 4 ... Plate, 5, 5A ... Negative electrode terminal, 6, 6A ... Busbar, 7, 7A ... Case 20, 20A ... main body, 30 ... connector part, 30A ... terminal, 31 ... positive electrode plate, 40 ... opening, 50A ... terminal, 60 ... main body, 60A ... concave part, 61 ... mating connector part, 62 ... opening, 63 ... Conductor, 64 ... folded portion, 65 ... convex portion, 66 ... concave portion, 70, 70A ... upper case, 71, 71A ... lower case, 300 ... connector body, 301 ... opening, 302 ... claw portion, 310 ... curved portion, 311 ... tip, 600, 600A, 600B ... end connector, 700 ... guide part

Claims (10)

An insulating part formed of an insulating member and provided in the secondary battery body;
An electrode part electrically connected to a power generation element housed in the secondary battery body;
A connector part electrically connected to the electrode part;
The terminal structure of the secondary battery provided with.   The said connector part electrically connects the said adjacent secondary battery by the connection part to which the 1st mating connector part to be connected and the 2nd mating connector part were electrically connected. Secondary battery terminal structure.   The terminal structure of the secondary battery according to claim 2, wherein the connection part is provided in a housing part that houses the plurality of secondary batteries.   The secondary battery terminal structure according to claim 2, wherein the connecting portion is provided on a lid of a housing portion that houses the plurality of secondary batteries. An insulating part formed of an insulating member and provided in the secondary battery body;
An electrode part electrically connected to a power generation element housed in the secondary battery body;
A secondary battery comprising at least one terminal structure having a connector portion electrically connected to the electrode portion.   The said connector part electrically connects the said adjacent secondary battery by the connection part to which the 1st mating connector part to be connected and the 2nd mating connector part were electrically connected. Secondary battery.   The secondary battery according to claim 6, wherein the connecting portion is provided in a housing portion that houses the plurality of secondary batteries.   The secondary battery according to claim 6, wherein the connecting portion is provided on a lid of a housing portion that houses the plurality of secondary batteries. An insulating part formed of an insulating member and provided in the secondary battery body;
An electrode part electrically connected to a power generation element housed in the secondary battery body;
A plurality of secondary batteries having at least one terminal structure having a connector portion electrically connected to the electrode portion;
A first mating connector section connected to the connector section, and a coupling section in which the second mating connector section is electrically connected;
With
The connection part is a secondary battery module provided in a housing part that houses the plurality of secondary batteries. An insulating part formed of an insulating member and provided in the secondary battery body;
An electrode part electrically connected to a power generation element housed in the secondary battery body;
A plurality of secondary batteries having at least one terminal structure having a connector portion electrically connected to the electrode portion;
A first mating connector section connected to the connector section, and a coupling section in which the second mating connector section is electrically connected;
With
The connecting portion is a secondary battery module provided on a lid of a housing portion that houses the plurality of secondary batteries.

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