JP2016018741A - Battery wiring module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery wiring module which allows for reduction in the number of components assembled to a battery module, and simplification of the assembling work of components to the battery module.SOLUTION: A battery wiring module includes a plurality of bus bars 32 arranged in parallel, at predetermined intervals each other, in order to connect adjoining positive electrode terminal 13A and negative electrode terminal 13B electrically, a voltage detection line 40 in which a plurality of linear conductors 21 are arranged in parallel along one side edge 32a of the arrangement of bus bars 32 and collected, and an insulation cover 60 provided along the other side edge 32b of the arrangement of bus bars 32 and surrounding the periphery of a connection A. The voltage detection line 40, bus bars 32 and insulation cover 60 are integrated, and the insulation cover 60 is arranged while being folded to the upper side.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a battery wiring module.

  In an in-vehicle battery pack connected to a power conversion device for driving a motor in a vehicle such as a hybrid vehicle or an electric vehicle, the positive and negative terminals of a large number of battery cells are alternately stacked in opposite directions. Thus, the battery modules are arranged side by side. A plurality of battery cells are connected in series or in parallel by connecting electrode terminals of adjacent battery cells with a connecting member such as a bus bar.

  When assembling the battery module having the above-described configuration, it is necessary to connect a plurality of electrode terminals with a connecting member. Accordingly, a bus bar module is used in which a plurality of connecting members arranged in a mold by insert molding or the like are integrally formed in an insulating resin in accordance with the number of electrode terminals to be connected.

  On the other hand, when a plurality of battery cells are connected in series or in parallel, if battery characteristics such as battery voltage are not uniform between the battery cells, the battery may be deteriorated or damaged. Therefore, in battery packs for vehicles, voltage detection lines for detecting the voltage of the battery cells are attached to each bus bar in order to stop charging and discharging before abnormality occurs in the voltage between the battery cells. ing.

  In the conventional bus bar module, the voltage detection wire is peeled off from the end of the covered electric wire, a round terminal is crimped to the core wire, and the round terminal is fitted to the electrode terminal of the battery cell. A structure in which the connecting member is fastened together with a nut has been adopted.

  However, such a bus bar module has a problem that when the number of voltage detection lines is large, the bus bar module becomes thick and difficult to bend, and is heavy and difficult to wire. In addition, the positive terminal and the negative terminal projecting from the battery cell are fitted together with a bus bar that is a connecting member and a round terminal that is crimped to the voltage detection line and is tightened with a nut. For this reason, there has been a problem that the resistance of the contact surface between the bus bar and the round terminal is increased and a voltage drop occurs.

  Therefore, a battery module that can be easily wired to each battery cell with a simple structure, reduces the number of parts, and is downsized has been proposed (see Patent Document 1).

  This battery module includes a plurality of connection members that electrically connect electrode terminals of adjacent unit cells, and a voltage detection line for measuring the voltage of the unit cell, and the voltage detection line has a flat shape. A flexible flat cable in which the outer periphery of the flat conductor is surrounded in a flat shape with an insulating resin, and a flexible printed circuit board, and the connecting member is directly connected to the conductor of the flexible flat cable or the conductive pattern of the flexible printed circuit board. It is connected.

JP 2011-210711 A

  By the way, the battery module is provided with an insulating cover that covers a connection portion between the electrode terminal of the battery cell and the connection member.

  Conventionally, a complicated assembling work for assembling the insulating cover to the battery module is required after fixing the connecting member to the electrode terminal and wiring the voltage detection line. For this reason, reduction of the number of parts assembled | attached to a battery module and simplification of an assembly | attachment operation are desired.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a battery wiring module capable of reducing the number of parts to be assembled to the battery module and simplifying the work of assembling the parts to the battery module. It is in.

In order to achieve the above-described object, the battery wiring module according to the present invention is characterized by the following (1) to (5).
(1) A battery wiring module that is assembled to a battery module including a plurality of battery cells that are alternately stacked in a reverse direction so that a positive electrode terminal and a negative electrode terminal are adjacent to each other,
A plurality of bus bars arranged in parallel at predetermined intervals to electrically connect the adjacent positive electrode terminal and the negative electrode terminal;
A detection line in which a plurality of linear conductors are arranged in parallel along one side edge of the array of bus bars, and
An insulating cover part provided along the other side edge of the array of the bus bars and surrounding a periphery of a connection portion between the positive terminal and the negative terminal and the bus bar;
With
The detection line, the bus bar and the insulating cover part are integrated,
The battery wiring module according to claim 1, wherein the insulating cover part is folded back and arranged above the bus bar.
(2) The insulating cover portion is formed by extruding resin with respect to the linear conductor and the bus bar, and the resin is coated on the linear conductor to form the detection line. ,
The battery wiring module configured as described in (1) above, wherein the detection line, the bus bar, and the insulating cover are connected and integrated by the resin.
(3) The detection line is raised upward from one side edge of the bus bar,
The said insulating cover part has a side surface formation part which opposes the said detection line, and an upper surface formation part which opposes the said bus-bar. The battery wiring module of the structure of said (1) or (2) characterized by the above-mentioned.
(4) The insulation cover part is formed with an engagement slit into which a partition part protruding from between the adjacent bus bars is inserted. Any one of (1) to (3), A battery wiring module having the configuration of one item.
(5) A temperature sensor further comprising: an elastic support plate in which a fixing hole into which the positive electrode terminal or the negative electrode terminal can be inserted is formed at one end; and a temperature measuring unit provided at the other end of the support plate. Prepared,
The bus bar is fixed to the positive terminal and the negative terminal in a state where the positive terminal or the negative terminal is inserted into the fixing hole of the support plate of the temperature sensor, so that the temperature sensor is attached to the battery cell. The temperature measuring unit is pressed against the battery cell by the elastic force of the support plate. The battery wiring module having the configuration according to any one of (1) to (4) above.

In the battery wiring module having the above configuration (1), the detection line, the bus bar, and the insulating cover are integrated, so that the positive electrode terminal and the negative electrode terminal are electrically connected by the bus bar when assembled to the battery module. A wire can be wired and a connection location can be covered with an insulating cover part.
As a result, the positive electrode terminal and the negative electrode terminal are electrically connected with the bus bar and the detection line is wired, and then the work of assembling can be simplified by eliminating the work of separately attaching the insulating cover covering the connection portion. The number of parts to be assembled can be reduced.
In the battery wiring module having the configuration (2), the integration is easily achieved by extrusion molding, so that the manufacturing cost can be reduced.
In the battery wiring module having the above configuration (3), both sides of the connection portion are covered with the detection line and the side surface forming portion of the insulating cover portion, and further, the upper portion of the connection portion is covered with the upper surface forming portion of the insulating cover portion. it can. Thereby, a connection location can be enclosed reliably and safety can be improved.
In the battery wiring module configured as described in (4) above, the insulating cover portion is extremely easily maintained in a state of covering the connection portion by inserting the partition portion into the engagement slit of the insulating cover portion and engaging the same. be able to.
In the battery wiring module having the configuration (5), the temperature sensor is separately fixed by fixing the bus bar to the positive terminal and the negative terminal with the positive terminal or the negative terminal inserted in the fixing hole of the support plate of the temperature sensor. The battery cell can be easily mounted without being fixed by means. Further, by attaching the temperature sensor to the battery cell, the temperature measuring unit is pressed against the battery cell by the elastic force of the support plate, so that the temperature of the battery cell can be accurately measured.

  ADVANTAGE OF THE INVENTION According to this invention, the battery wiring module which can reduce the number of components assembled | attached to a battery module and can simplify the assembly | attachment operation | work of the components to a battery module can be provided.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

FIG. 1 is an overall perspective view of a battery pack in which battery wiring modules according to an embodiment of the present invention are combined. FIG. 2 is a cross-sectional view of a main part of the battery pack. FIG. 3 is a perspective view of the battery wiring module. FIG. 4 is a plan view of the battery wiring module. FIG. 5 is a view showing how to install the insulating cover portion, and FIGS. 5A and 5B are cross-sectional views of the main part of the battery pack. FIG. 6 is a perspective view of the temperature sensor. FIG. 7 is a side view of the temperature sensor. FIG. 8 is a rear view of the temperature sensor. FIG. 9 is a diagram for explaining a method for manufacturing a battery wiring module. FIGS. 9A to 9D are a plan view (left side) and a cross-sectional view (right side) of the battery wiring module being manufactured. It is.

Hereinafter, an example of an embodiment according to the present invention will be described with reference to the drawings.
FIG. 1 is an overall perspective view of a battery pack in which battery wiring modules according to an embodiment of the present invention are combined. FIG. 2 is a cross-sectional view of a main part of the battery pack.

  As shown in FIGS. 1 and 2, the battery pack 10 in which the battery wiring module 30 according to the present embodiment is combined is used as a drive source of an electric vehicle or a hybrid vehicle, for example, and is arranged side by side. The battery module 20 includes a plurality of battery cells 12. Further, the battery module 20 includes a temperature sensor 31. In the battery module 20, a plurality of battery cells 12 are arranged and fixed via a separator 22 in a box-shaped housing (not shown).

  As shown in FIG. 1, a strip-shaped battery wiring module 30 is arranged on the plurality of battery cells 12 along the arrangement direction of the battery cells 12. The battery wiring modules 30 are arranged in two rows along the arrangement direction of the battery cells 12. In FIG. 1, a state in which the battery cells 12 are attached to only one row along the arrangement direction of the battery cells 12 is illustrated.

FIG. 3 is a perspective view of the battery wiring module. FIG. 4 is a plan view of the battery wiring module.
As shown in FIGS. 3 and 4, the battery wiring module 30 according to this embodiment includes a plurality of bus bars 32 that connect a plurality of battery cells 12 in series, and a voltage detection line 40 that measures the voltage of each battery cell 12. And a connector 50 that is connected and fixed to one end of the voltage detection line 40, and an insulating cover portion 60 that covers the connection portion A between the positive terminal 13 </ b> A and the negative terminal 13 </ b> B and the bus bar 32.

  The battery cell 12 is a secondary battery, and a positive electrode terminal 13A and a negative electrode terminal 13B protrude from the upper surface. When the battery cell 12 is disposed in the housing, the positive electrode terminal 13A and the negative electrode terminal 13B are adjacent to each other as shown in FIG. Thus, the battery cells 12 are arranged so as to be alternately stacked in opposite directions. The positive terminal 13 </ b> A and the negative terminal 13 </ b> B are tightened with the nut 15 with the bus bar 32 interposed therebetween.

  On both sides of each battery cell 12, separators 22 made of insulating resin are arranged. A partition portion 24 that protrudes upward from the upper surface of the battery cell 12 is formed at the upper end of the separator 22. This partition part 24 is arrange | positioned at the slit 45 formed between the adjacent bus bars 32, and prevents the short circuit between the electrode terminals by a tool.

  In the battery wiring module 30, a plurality of bus bars 32 are arranged on the positive electrode terminals 13 </ b> A and the negative electrode terminals 13 </ b> B that are alternately arranged along the arrangement direction of the battery cells 12, and the voltage detection lines 40 are arranged in a bus bar array of these bus bars 32. It is arranged in parallel on the inner side (one side edge of the array of bus bars 32). The voltage detection line 40 is erected at a right angle to the bus bar 32. Further, in the battery wiring module 30, the insulating cover portion 60 is disposed outside the bus bar row by the bus bars 32 (the other side edge of the arrangement of the bus bars 32). The insulating cover part 60 extends laterally along the bus bar 32.

  The bus bars 32 constituting the battery wiring module 30 are arranged so that the terminal insertion holes 34 through which the positive terminal 13A and the negative terminal 13B are inserted and connected are arranged in a line. In the bus bar row of the battery wiring modules 30 mounted on the back side shown in FIG. 1, one bus hole 32 having one terminal insertion hole 34 is disposed at both ends as the bus bar 32. Between the two one-hole bus bars 32 arranged at both ends, five two-hole bus bars 32 each having two terminal insertion holes 34 are arranged. In the bus bar row of the battery wiring module 30 mounted on the front side shown in FIG. 1, six bus holes 32 with two holes are arranged.

  As shown in FIG. 4, each bus bar 32 has a substantially rectangular shape, and is formed with a terminal insertion hole 34 through which the positive terminal 13A and the negative terminal 13B are inserted and connected. The bus bar 32 is formed by stamping a long flat conductor made of a metal plate material such as copper, copper alloy, aluminum, aluminum alloy, gold, stainless steel (SUS) in a pressing process described later. The bus bar 32 may be plated with Sn, Ni, Ag, Au, etc. in order to improve weldability.

  Note that the bus bar 32 of the present embodiment is electrically connected to the positive terminal 13A and the negative terminal 13B inserted through the terminal insertion hole 34 by screwing and tightening the nut 15. Of course, the bus bar 32 according to the present invention may be electrically connected by welding to the positive terminal 13A and the negative terminal 13B without the terminal insertion hole 34 being formed.

  The voltage detection line 40 constituting the battery wiring module 30 has an insulating resin portion 23 (for example, polypropylene (PP) formed by integrally extruding the outer peripheral portions of a plurality of linear conductors 21 arranged in parallel at a predetermined interval. ), Polyvinyl chloride (PVC), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), etc.) to form a flat cable. As the linear conductor according to the present invention, various conductors such as a single wire such as a flat conductor and a round conductor, and a stranded wire can be used.

  The insulation cover part 60 which comprises the battery wiring module 30 consists of the insulating resin part 23 by which extrusion molding was carried out, and is formed in plate shape. The insulating cover part 60 has a side surface forming part 61 and an upper surface forming part 62. The side surface forming part 61 has a width dimension larger than the height dimension of the positive electrode terminal 13A and the negative electrode terminal 13B. The upper surface forming part 62 has a width dimension substantially the same as the width dimension of the bus bar 32. Connection portions 63 and 64 are provided on the side of the side surface forming portion 61 on the bus bar 32 side and between the side surface forming portion 61 and the upper surface forming portion 62.

  The side surface forming portion 61 is connected to the side edge portion 32 b of the bus bar 32 via the connecting portion 63, and the side surface forming portion 61 and the upper surface forming portion 62 are connected to each other via the connecting portion 64. The connecting portions 63 and 64 are formed thinner than the other portions and can be bent. As a result, the side surface forming portion 61 can be rotated with respect to the bus bar 32. On the other hand, the upper surface forming part 62 is rotatable. A plurality of engagement slits 65 are formed in the upper surface forming part 62. These engagement slits 65 are formed along the width direction of the upper surface forming portion 62. These engagement slits 65 are formed in such a size that the partition portion 24 formed at the upper end of the separator 22 can be inserted, and are formed at the same pitch as the arrangement pitch of the partition portions 24 in the battery module 20.

  FIGS. 5A and 5B are diagrams showing how to install the insulating cover, and FIGS. 5A and 5B are cross-sectional views of the main part of the battery pack.

  As shown in FIG. 5A, the insulating cover portion 60 is rotated by the connecting portion 63 so that the side surface forming portion 61 is raised at a right angle with respect to the bus bar 32 and faces the voltage detection line 40. Placed in position. Thereby, both sides of the connection portion A are surrounded by the voltage detection line 40 and the side surface forming portion 61 of the insulating cover portion 60.

  Further, as shown in FIG. 5B, the insulating cover portion 60 is rotated by the connecting portion 64, so that the upper surface forming portion 62 is arranged at a right angle to the side surface forming portion 61, and the voltage detection line 40. It extends in the horizontal direction toward the side and is arranged substantially parallel to the bus bar 32. Thereby, the connection portion A is covered with the upper surface forming part 62 of the insulating cover part 60 at the upper part thereof. In the state where the upper surface forming portion 62 is disposed above the connection location A, the partition portion 24 of the separator 22 is inserted into each engagement slit 65, whereby the upper surface forming portion 62 is engaged with the partition portion 24 of the separator 22. Stopped. Thereby, the upper surface formation part 62 is maintained in the state arrange | positioned above the connection location A, Therefore, the side surface formation part 61 is also maintained in the state arrange | positioned at the side of the connection location A.

  Further, both side edges 32a and 32b of the bus bar 32 are covered with an insulating resin portion 23 formed by integral extrusion. Accordingly, the side edges 32a and 32b of the plurality of bus bars 32 are connected to the voltage detection line 40 and the insulating cover part 60, and are arranged integrally with the voltage detection line 40 and the insulating cover part 60 at a predetermined interval. Established. Therefore, it is possible to prevent the bus bars 32 from varying individually, and it is possible to prevent a decrease in the bonding force.

  The bus bar 32 in the battery wiring module 30 electrically connects the adjacent positive electrode terminal 13 </ b> A and the negative electrode terminal 13 </ b> B, and electrically connects with the corresponding linear conductor 21 of the voltage detection line 40 for measuring the voltage of the battery cell 12. Connected.

  In this embodiment, the bus bar 32 and the corresponding linear conductor 21 of the voltage detection line 40 are connected by a metal connection member 35 described later. The connecting member 35 has a press-contact blade portion formed at one end thereof press-connected to a predetermined linear conductor 21 and the other end welded to a predetermined bus bar 32. The “welding connection” in the present embodiment includes various known welding connections such as spot welding, ultrasonic welding, and laser welding. Further, the connecting member is not limited to the one having the press contact blade portion at one end, and may be an electric wire, a bus bar or the like.

  In the bus bar 32 having one hole, the edge may be cut and raised and connected to the corresponding linear conductor 21 of the voltage detection line 40. The cut and raised piece can select the predetermined linear conductor 21 to which the intermediate portion is welded by appropriately changing the welding position.

  The temperature sensor 31 measures the temperature of the battery cell 12 constituting the battery module 20, and detects an abnormality of the battery module 20 from the temperature measured by the temperature sensor 31.

FIG. 6 is a perspective view of the temperature sensor. FIG. 7 is a side view of the temperature sensor. FIG. 8 is a rear view of the temperature sensor.
As shown in FIGS. 6 to 8, the temperature sensor 31 includes a support plate 71 and a temperature measuring unit 72. The support plate 71 is made of a plate material having elasticity, and one end side is a fixed plate portion 74 having a fixed hole 73. The support plate 71 has an elastic plate portion 75 that is inclined and extends downward from the fixed plate portion 74. On the opposite side of the elastic plate portion 75 from the fixed plate portion 74, a pressing extending in the horizontal direction is provided. A plate portion 76 is provided. A temperature measuring unit 72 is attached to the lower surface side of the pressing plate portion 76. The temperature measuring unit 72 is made of, for example, a thermistor and detects the temperature of the contacted object.

  The temperature sensor 31 is attached to an upper part of a predetermined battery cell 12 of the battery module 20. In order to attach the temperature sensor 31 to the battery cell 12, first, on the predetermined battery cell 12 with the positive electrode terminal 13 </ b> A or the negative electrode terminal 13 </ b> B inserted through the fixing hole 73 formed in the fixing plate portion 74 of the support plate 71. To be placed. In this state, the bus bar 32 of the battery wiring module 30 is attached to the positive terminal 13 </ b> A or the negative terminal 13 </ b> B of the battery cell 12 and tightened with the nut 15. In this way, the fixing plate portion 74 of the support plate 71 of the temperature sensor 31 is fastened and fixed to the positive electrode terminal 13 </ b> A or the negative electrode terminal 13 </ b> B together with the bus bar 32 and attached to the battery cell 12. Then, the temperature sensor 31 attached to the battery cell 12 in this way comes into contact with the temperature measuring portion 72 pressed against the upper surface of the battery cell 12 by the elastic force of the elastic plate portion 75 of the support plate 71.

Next, a method for manufacturing the battery wiring module 30 having the above configuration will be described.
FIG. 9 is a diagram for explaining a method for manufacturing a battery wiring module. FIGS. 9A to 9D are a plan view (left side) and a cross-sectional view (right side) of the battery wiring module being manufactured. It is.

  The battery wiring module 30 of the present embodiment is arranged in a direction in which a plurality of linear conductors 21 arranged in parallel at a predetermined interval are orthogonal to a long flat conductor 33 along one side thereof. The arrangement step (see FIG. 9A) and the insulating resin portion 23 integrally formed by extrusion form the outer peripheral portion of the plurality of linear conductors 21 and the side edge portions 33a and 33b of the flat conductor 33. An extruding step (see FIG. 9B) in which the insulating cover portion 60 is formed along the side edge portion 33b of the flat conductor 33 while being covered, and at a predetermined interval along the longitudinal direction of the flat conductor 33. A plurality of bus bars 32 for electrically connecting the adjacent positive electrode terminal 13A and negative electrode terminal 13B are formed by punching the plurality of slits 45 and the terminal insertion holes 34, and further, the insulating cover portion 60. A pressing step (see FIG. 9C) in which a plurality of engagement slits 65 are formed at predetermined intervals along the longitudinal direction, and a plurality of linear conductors 21 are electrically connected to predetermined bus bars 32 by connecting members 35, respectively. And a connecting step (see FIG. 9D) to be connected to each other.

  First, in the arrangement process and the extrusion process shown in FIGS. 9A and 9B, a direction in which a plurality of linear conductors 21 are orthogonal to each other with a predetermined interval with respect to the long flat conductor 33. The insulating resin portion 23 is extruded by a known extruder using an extrusion die having a die opening that can be disposed in the outer periphery of the plurality of linear conductors 21 and the side edge portions 33a of the flat conductors 33. 33b is covered and the insulating cover part 60 is molded.

  That is, the outer peripheral portion of the plurality of linear conductors 21 and the side edge portions 33a and 33b of the long flat conductor 33 are covered with the integrally extruded insulating resin portion 23, and the insulating cover portion 60 is further covered. Is formed. Thereby, the plurality of linear conductors 21 constituting the flat cable-shaped voltage detection line 40 and the flat conductor 33 are integrated in a state of being orthogonal to each other in a cross-sectional view, and further along the flat conductor 33. A long circuit body in which the insulating cover 60 is integrally formed is formed (see FIG. 9B).

  Next, in the pressing step shown in FIG. 9C, after the circuit body is cut to a desired longitudinal length, a plurality of slits are formed at a predetermined interval P along the longitudinal direction of the flat conductor 33 in the circuit body. A plurality of bus bars 32 are formed by punching 45 and punching the terminal insertion holes 34. At this time, the length in the longitudinal direction of the slit 45 is set so that the adjacent bus bars 32 are surely separated from each other.

  Further, a plurality of engagement slits 65 are punched into the insulating cover part 60 in the circuit body at a predetermined interval P along the longitudinal direction. The engagement slit 65 is formed at the same position in the longitudinal direction as the slit 45.

  Depending on the size of the battery cell 12 and the like, the predetermined interval P between the slits 45, the predetermined interval P between the engagement slits 65, the interval between the pair of terminal insertion holes 34, and the inner diameter are appropriately changed and pressed. Can do. Therefore, several types of battery wiring modules 30 having different specifications can be formed from one type of circuit body.

  Next, in the connection step shown in FIG. 9D, the plurality of linear conductors 21 are electrically connected to predetermined bus bars 32 by connection members 35, respectively. The connecting member 35 has a press-contact blade portion formed at one end of the main body pressed into a predetermined linear conductor 21 and the other end of the main body welded to a predetermined bus bar 32. The battery wiring module 30 is completed by connecting and fixing the connector 50 to one end of the voltage detection line 40.

The battery wiring module 30 configured in this way is arranged side by side so that the positive electrode terminal 13A and the negative electrode terminal 13B of the opposite poles are arranged between the two adjacent battery cells 12, 12 of the 12 battery cells 12. The battery module 20 is placed on the upper surface.
At this time, the positive terminal 13 </ b> A or the negative terminal 13 </ b> B of the predetermined battery cell 12 is inserted into the fixing hole 73 formed in the fixing plate portion 74 of the support plate 71 of the temperature sensor 31 in advance and arranged on the battery cell 12. .

  Next, all the positive terminals 13 </ b> A and the negative terminals 13 </ b> B of the plurality of battery cells 12 arranged side by side are inserted into all the terminal insertion holes 34 of the bus bar 32, and the partition portion 24 of the separator 22 is inserted into the slit 45. .

  Then, the nut 15 is screwed into the positive terminal 13A and the negative terminal 13B protruding from the terminal insertion hole 34 and tightened. When the nut 15 is tightened, the fixing plate portion 74 of the support plate 71 of the temperature sensor 31 is fastened and fixed to the positive electrode terminal 13 </ b> A or the negative electrode terminal 13 </ b> B together with the bus bar 32 and attached to the battery cell 12.

  When the nuts 15 are tightened on all the positive terminals 13A and the negative terminals 13B, the insulating cover 60 is folded back, and the partition 24 of the separator 22 is inserted into the engagement slit 65 of the upper surface forming part 62, thereby Is covered with an insulating cover 60. Thereby, the battery pack 10 in which the battery wiring module 30 is attached to the battery module 20 is completed.

  According to the battery wiring module according to the present embodiment, the voltage detection line 40 in which the plurality of linear conductors 21 for detecting the voltage of each battery cell 12 are combined, and the adjacent positive electrode terminal 13A and negative electrode terminal 13B are connected. The bus bar 32 and the insulating cover portion 60 that covers the connection portion A between the bus bar 32 and the positive terminal 13A and the negative terminal 13B are integrated. Thus, by assembling the battery module 20, the positive terminal 13 </ b> A and the negative terminal 13 </ b> B are electrically connected by the bus bar 32, the voltage detection line 40 is wired, and the connection portion A is covered with the insulating cover part 60. it can.

  Thereby, after the positive electrode terminal 13A and the negative electrode terminal 13B are electrically connected by the bus bar 32 and the voltage detection line 40 is wired, the troublesome work of separately attaching the insulating cover covering the connection portion A is eliminated, and the assembling work is simplified. In addition, the number of parts assembled to the battery module 20 can be reduced.

  Further, since the battery wiring module 30 is easily integrated by extrusion molding, the manufacturing cost can be reduced.

  Further, both sides of the connection portion A can be covered with the voltage detection line 40 and the side surface forming portion 61 of the insulating cover portion 60, and further, the upper side of the connection portion A can be covered with the upper surface forming portion 62 of the insulating cover portion 60. Thereby, the connection location A can be reliably enclosed and safety can be improved.

  Furthermore, the insulating cover part 60 can be maintained in the state which covered the connection location A very easily by inserting and engaging the partition part 24 in the engagement slit 65 of the insulating cover part 60. FIG.

  Further, in the battery wiring module 30 according to the present embodiment, the bus bar 32 is connected to the positive terminal 13A and the negative terminal in a state where the positive terminal 13A or the negative terminal 13B is inserted into the fixing hole 73 of the fixing plate portion 74 of the support plate 71 of the temperature sensor 31. By fixing to the terminal 13B, the temperature sensor 31 can be easily attached to the battery cell 12 without being fixed by another fixing means. Further, by attaching the temperature sensor 31 to the battery cell 12, the temperature measuring unit 72 is pressed against the battery cell 12 by the elastic force of the support plate 71, so that the temperature of the battery cell 12 can be accurately measured.

  In the above-described embodiment, the plurality of linear conductors 21 are covered with the insulating resin portion 23 to form the flat cable-shaped voltage detection line 40. However, as the voltage detection line 40, a flexible printed circuit board (FPC) is used. You may integrate the voltage detection line 40, the bus bar 32, and the insulating cover part 60 which consist of this flexible printed circuit board.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

Here, the features of the embodiment of the battery wiring module according to the present invention described above are briefly summarized and listed in the following (1) to (5), respectively.
(1) Battery wiring assembled to a battery module (20) having a plurality of battery cells (12) arranged so that the positive electrode terminal (13A) and the negative electrode terminal (13B) are alternately stacked in opposite directions so as to be adjacent to each other. A module (30),
A plurality of bus bars (32) arranged in parallel at predetermined intervals to electrically connect the adjacent positive electrode terminal and the negative electrode terminal;
A detection line (voltage detection line 40) in which a plurality of linear conductors (21) are arranged in parallel along one side edge of the bus bar array;
An insulating cover part (60) provided along the other side edge of the array of the bus bars and surrounding a connection portion between the positive terminal and the negative terminal and the bus bar;
With
The detection line, the bus bar and the insulating cover part are integrated,
The battery wiring module according to claim 1, wherein the insulating cover part is folded back and arranged above the bus bar.
(2) The insulating cover portion is formed by extruding resin with respect to the linear conductor and the bus bar, and the resin is coated on the linear conductor to form the detection line. ,
The battery wiring module configured as described in (1) above, wherein the detection line, the bus bar, and the insulating cover are connected and integrated by the resin.
(3) The detection line is raised upward from one side edge of the bus bar,
The battery according to (1) or (2), wherein the insulating cover portion includes a side surface forming portion (61) facing the detection line and an upper surface forming portion (62) facing the bus bar. Wiring module.
(4) From the above (1), the insulating cover part is formed with an engagement slit (65) into which a partition part (24) protruding from between the adjacent bus bars is inserted. The battery wiring module according to any one of (3).
(5) An elastic support plate (71) in which a fixing hole into which the positive electrode terminal or the negative electrode terminal can be inserted is formed at one end, and a temperature measuring unit (72) provided at the other end of the support plate; A temperature sensor (31) having
The bus bar is fixed to the positive terminal and the negative terminal in a state where the positive terminal or the negative terminal is inserted into the fixing hole of the support plate of the temperature sensor, so that the temperature sensor is attached to the battery cell. The temperature measuring unit is pressed against the battery cell by the elastic force of the support plate. The battery wiring module having the configuration according to any one of (1) to (4) above.

12 battery cell 13A positive electrode terminal 13B negative electrode terminal 20 battery module 21 linear conductor 24 partition part 30 battery wiring module 31 temperature sensor 32 bus bar 32a, 32b side edge part 40 voltage detection line (detection line)
60 Insulating cover part 61 Side surface forming part 62 Upper surface forming part 65 Engagement slit 71 Support plate 72 Temperature measuring part 73 Fixing hole A Connection location

Claims (5)

A battery wiring module that is assembled to a battery module having a plurality of battery cells that are alternately stacked in opposite directions so that the positive electrode terminal and the negative electrode terminal are adjacent to each other,
A plurality of bus bars arranged in parallel at predetermined intervals to electrically connect the adjacent positive electrode terminal and the negative electrode terminal;
A detection line in which a plurality of linear conductors are arranged in parallel along one side edge of the array of bus bars, and
An insulating cover part provided along the other side edge of the array of the bus bars and surrounding a periphery of a connection portion between the positive terminal and the negative terminal and the bus bar;
With
The detection line, the bus bar and the insulating cover part are integrated,
The battery wiring module according to claim 1, wherein the insulating cover part is folded back and arranged above the bus bar. By extruding a resin to the linear conductor and the bus bar, the insulating cover portion is molded, and the linear conductor is covered with the resin to form the detection line,
The battery wiring module according to claim 1, wherein the detection line, the bus bar, and the insulating cover portion are connected and integrated with each other by the resin. The detection line is raised upward from one side edge of the bus bar,
The battery wiring module according to claim 1, wherein the insulating cover portion includes a side surface forming portion facing the detection line and an upper surface forming portion facing the bus bar. The battery according to any one of claims 1 to 3, wherein the insulating cover part is formed with an engagement slit into which a partition part protruding from between the adjacent bus bars is inserted. Wiring module. A temperature sensor having an elastic support plate formed at one end with a fixing hole through which the positive electrode terminal or the negative electrode terminal can be inserted, and a temperature measuring unit provided at the other end of the support plate;
The bus bar is fixed to the positive terminal and the negative terminal in a state where the positive terminal or the negative terminal is inserted into the fixing hole of the support plate of the temperature sensor, so that the temperature sensor is attached to the battery cell. 5. The battery wiring module according to claim 1, wherein the temperature measuring unit is pressed against the battery cell by an elastic force of the support plate.

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