JP6194828B2 - Wiring module and battery unit - Google Patents

Description

  The present invention relates to a wiring module used for electrically connecting an electric device and a substrate, and a battery unit including the wiring module.

  In the battery unit described in Patent Document 1 below, voltage detection means is provided outside a battery stack composed of a plurality of battery cells.

JP 2009-230954 A

  Thus, when the voltage detection means is provided outside the battery stack, the work of connecting the battery cell (the signal processing board 12 in Patent Document 1) and the battery cell constituting the voltage detection means becomes complicated. . In addition, stress is likely to occur at the connection portion between the substrate or the battery stack and the wiring (connection failure is likely to occur).

  An object of the present invention is to provide a wiring module that can easily perform wiring work between a substrate and an electric device and that is excellent in reliability of electrical connection, and a battery unit including the wiring module.

  In order to solve the above-described problems, a wiring module according to the present invention is a wiring module for connecting a battery stack composed of a plurality of battery cells and a substrate to each terminal and substrate of the plurality of battery cells. A plurality of wiring members that electrically connect the formed conductive pattern, and a wiring holding member that is fixed to the plurality of wiring members and regulates the interval between the wiring members.

  The plurality of wiring members are a portion fixed to the wiring holding member and a portion closer to the electric device than a portion fixed to the wiring holding member, and is a first not fixed to the wiring holding member And an extra length portion.

  The length of the first surplus portion may be such that one end of each wiring member cannot be connected to a terminal other than the corresponding terminal.

  The plurality of wiring members are a portion fixed to the wiring holding member and a portion on the substrate side of a portion fixed to the wiring holding member, and a second margin not fixed to the wiring holding member. And a long portion.

  The wiring holding member may be formed of a flexible material.

  The wiring holding member has a first holding part and a second holding part made of a flexible material, and the wiring member is sandwiched between the first holding part and the second holding part. The wiring holding member may be fixed.

  A slit may be formed in the wiring holding member.

  The wiring holding member may be made of a hard material.

  It is preferable that a substrate mounting surface on which the substrate is mounted is provided on the wiring holding member.

  The wiring member may have a substrate-side connection terminal portion that protrudes from the substrate mounting surface of the wiring holding member and is connected to the conductive pattern.

  A board relay member that electrically connects conductive patterns formed on each of the plurality of boards may be embedded in the wiring holding member.

  The wiring holding member may be provided with a hook portion on which the first extra length portion is hooked.

  It is preferable that the wiring holding member has a board connecting portion connected to the board.

  The plurality of wiring members may be conductive patterns formed on a flexible substrate.

  A slit may be formed between the wiring members of the flexible substrate.

  In order to solve the above problems, a battery unit according to the present invention includes the wiring module, a substrate on which a conductive pattern is formed, and a battery stack including a plurality of battery cells, and the plurality of wiring members are Each end is connected to each terminal of the plurality of battery cells, and the other end is connected to the conductive pattern.

  A plurality of land portions that are a part of the conductive pattern are formed on the substrate so as to be aligned along a parallel direction of the plurality of battery cells, and the plurality of wiring members are formed of the plurality of battery cells. One end of each of the plurality of battery cells may be connected to each terminal of the plurality of battery cells, and the other end may be connected to each of the land portions so as to be aligned along the parallel direction.

  Since the wiring module according to the present invention includes a wiring holding member to which a plurality of wiring members are fixed, the wiring members are prevented from being tangled with each other during the wiring work, and the wiring work is facilitated. In addition, since the movement of the wiring member is restricted by the wiring holding member, the stress applied to the connection portion between the substrate and the wiring member, and the terminal of the electric device and the wiring member is reduced. That is, the reliability of electrical connection is excellent.

  If the wiring member is provided with the first surplus length portion, which is a portion closer to the terminal side of the electrical device than the portion fixed to the wiring holding member, one end of the wiring member moves by the amount of the first surplus length portion. Therefore, one end of the wiring member and the terminal can be easily connected (absorbing errors). Moreover, the stress which arises in the connection part of a wiring member and a terminal is reduced.

  If the length of the first extra length is set so that one end of each wiring member cannot be connected to a terminal other than the terminal of the corresponding electrical device, the wiring member is mistakenly connected to another terminal. Is prevented.

  If the wiring member is provided with the second extra length portion that is a portion closer to the substrate than the portion fixed to the wiring holding member, the stress generated at the connection portion between the wiring member and the conductive pattern is further reduced.

  If the wiring holding member is formed of a flexible material, the degree of freedom in routing the wiring member is improved within a range in which the distance between the wiring members is maintained, and wiring work is facilitated.

  When the wiring holding member is formed of a flexible material, the wiring member is fixed to the wiring holding member by sandwiching the wiring member between two flexible materials (first holding portion and second holding portion). (Easy to manufacture).

  If the slit is formed in the wiring holding member, the stress generated in the connection portion between the wiring member and the conductive pattern and between the wiring member and the terminal is further reduced.

  If the wiring holding member is made of a hard material, the function of maintaining the interval between the wiring members by the wiring holding member is excellent.

  When the wiring holding member is formed of a hard material, the wiring holding member can also function as a member for supporting the substrate.

  When the wiring holding member is formed of a hard material and functions as a member for supporting the substrate, if the wiring member is provided with a board-side connection terminal portion protruding from the wiring holding member to the board side, the board ( The connection between the conductive pattern) and the wiring member is facilitated.

  A relay member that electrically connects conductive patterns formed on each of the plurality of substrates can be embedded in the wiring holding member.

  When the wiring holding member is formed of a hard material, a hooking portion on which the first extra length portion is hooked can be provided on the wiring holding member.

  If the wiring holding member is connected to the substrate, the wiring holding member functions as a member that reinforces the connection between the wiring member and the conductive pattern (substrate) (reduces stress generated at the connection portion between the wiring member and the conductive pattern). Can do.

  If a plurality of wiring members are conductive patterns formed on the flexible substrate, that is, if the plurality of wiring members are integrated by the base material of the flexible substrate, the wiring members may be entangled with each other. Since there is no wiring work, it becomes easy.

  If the slit is formed between each wiring member in a flexible substrate, the stress which arises in the connection part of a wiring member and a conductive pattern, a wiring member, and a terminal will be reduced further.

  Since the battery unit according to the present invention has a wiring holding member to which a plurality of wiring members are fixed, the wiring members are prevented from being entangled during the wiring work, and the wiring work is facilitated. In addition, since the movement of the wiring member is regulated by the wiring holding member, the stress applied to the connection portion between the substrate and the wiring member, the terminal of each battery cell constituting the battery unit and the wiring member is reduced. That is, the reliability of electrical connection is excellent.

  In addition, if one end is connected to each land portion so that the plurality of wiring members are arranged along the parallel direction of the plurality of battery cells, wiring work is easy. Moreover, since it is not the structure which draws a wiring member largely, the stress which arises in the connection part of a wiring member and a land part is reduced. Furthermore, since the space | interval of the land parts in a board | substrate can be enlarged, the possibility that it may short-circuit between land parts is reduced.

It is a disassembled perspective view of the battery unit concerning 1st embodiment of this invention. It is the figure which showed typically the cross section of the battery unit concerning 1st embodiment of this invention. It is a top view of the board | substrate in 1st embodiment, the wiring member connected to it, and a wiring holding member. It is a figure for demonstrating the method to fix a wiring member with respect to the wiring holding member in 1st embodiment. It is a disassembled perspective view of the battery unit concerning 2nd embodiment of this invention. It is the figure which showed typically the cross section of the battery unit concerning 2nd embodiment of this invention. It is a figure for demonstrating the hook part provided in the wiring holding member in 2nd embodiment. It is a figure for demonstrating the board | substrate relay member in 2nd embodiment. It is a disassembled perspective view of the battery unit concerning 3rd embodiment of this invention.

  Hereinafter, a battery unit 1 according to an embodiment of the present invention will be described in detail with reference to the drawings. Unless otherwise specified, the vertical direction in the following description refers to the vertical direction of each battery cell 11 (the side on which the terminal 110 is provided is up and the opposite side is down), and the parallel direction is The direction in which the plurality of battery cells 11 are arranged (stacked) is referred to. The width direction is a direction orthogonal to the vertical direction and the parallel direction, and the two terminals 110 (plus terminal and minus terminal) of each battery cell 11 are connected. Let's say the straight line direction. These directions do not limit the installation direction of the battery unit 1.

  A battery unit 1a according to the first embodiment of the present invention is used as a battery for a vehicle such as a hybrid car or an electric car, and includes a battery stack 10 (electric equipment), a substrate 20, a wiring member 30, and wiring holding. A member 40 is provided. Hereinafter, each configuration will be described with reference to FIGS.

  The battery stack 10 includes a plurality of battery cells 11. The battery cell 11 here refers to a battery packaged in one, and the characteristics such as the rated voltage and capacity of the one battery cell 11 are not limited to specific values. What is necessary is just to have the same rated value (design value) of each battery cell 11, and it is good also considering the thing formed by packaging the thing in which several batteries are connected to one as one battery cell 11. FIG.

  Each battery cell 11 has a plus terminal and a minus terminal on the upper side. The plus terminal is located on one side in the width direction of the battery cell 11, and the minus terminal is located on the other side in the width direction of the battery cell 11. Each battery cell 11 has a flat plate shape that is long in the width direction, and a battery stack 10 is formed by stacking the flat plates. When the battery stack 10 in which the plurality of battery cells 11 are arranged in this way is configured, the terminals 110 are linearly arranged on one side and the other side in the width direction of the battery stack 10. Specifically, on one side and the other side in the width direction of the battery stack 10, the battery cells 11 are arranged so that positive terminals and negative terminals are alternately arranged (the first terminal group arranged linearly on one side in the width direction is the first). A terminal group 111 and a terminal group arranged linearly on the other side are referred to as a second terminal group 112). The positive terminal of one battery cell 11 and the negative terminal of the battery cell 11 adjacent to one side thereof, and the negative terminal of the one battery cell 11 and the positive terminal of the battery cell 11 adjacent to the other side are electrically conductive. They are connected by a bus bar made of material (not shown for the sake of clarity). That is, the plurality of battery cells 11 constituting the battery stack 10 are connected in series.

  Further, in the present embodiment, hooking protrusions 113 for fixing the lid member 50 to the battery stack 10 are formed on the upper sides of both side surfaces in the width direction of each battery cell 11. In addition, each battery cell 11 which comprises the battery stack 10 may be the structure integrated by the lid member 50 mentioned later for details, or may be the structure integrated by things other than the lid member 50. Good. For example, each battery cell 11 may be provided with a structure for achieving physical connection with the adjacent battery cell 11.

  The lid member 50 covers the terminals 110 of the plurality of battery cells 11 constituting the battery stack 10. The lid member 50 is formed of an insulating material, and physically and electrically protects the terminal 110 of each battery cell 11. On both sides of the lid member 50 in the width direction, a plurality of hook pieces 51 extending downward are provided. The same number of hook pieces 51 as a pair on both sides in the width direction are provided as the number of battery cells 11 constituting the entire battery stack 10. In the juxtaposed direction, the distance between the pair of hooking pieces 51 is equal to the distance between the pair of hooking protrusions 113 provided on the battery cell 11. A through-hole through which the hooking protrusion 113 can pass is formed on the front end side of each hooking piece 51, and the lid member 50 is fixed to the battery stack 10 by hooking the hooking protrusion 113 into the through-hole of each hooking piece 51. Is done. Thereby, the terminals 110 of the plurality of battery cells 11 constituting the battery stack 10 are covered with the lid member 50.

  The substrate 20 is constructed of a circuit for monitoring the voltage of each battery cell 11 (voltage between terminals 110 of each battery cell 11). The circuit is constructed by conductive patterns formed on the substrate 20 and mounted elements. A land portion 21 to which the wiring member 30 is connected is formed in the conductive pattern (a conductive pattern other than the land portion 21 is not shown). A plurality of land portions 21 are formed on both sides in the width direction of the substrate 20 so as to be aligned along the parallel direction. The battery stack 10 constituted by the plurality of battery cells 11 needs to monitor the voltages of all the battery cells 11 constituting the battery stack 10 in order to prevent ignition due to overcharging. Therefore, the circuit (configured of conductive patterns and various elements) formed on the substrate 20 is electrically connected to the terminals 110 of all the battery cells 11. Note that a battery control circuit for controlling the battery stack 10 (each battery cell 11) may be constructed on the substrate 20.

  The substrate 20 is installed so as to face the upper surface of the battery stack 10 (the surface on which the terminals 110 are located). That is, the substrate 20 is provided along the parallel direction of the plurality of battery cells 11. In the present embodiment, the length of the substrate 20 in the parallel direction is substantially equal to the length of the battery stack 10 in the direction, and the length of the substrate 20 in the width direction is smaller than the length of the battery stack 10 in the direction.

  Further, the substrate 20 is installed such that each land portion 21 is aligned with the corresponding terminal 110 in the parallel direction. Specifically, the plus terminal and minus terminal of one battery cell 11 are two land parts 21 (plus terminal connecting land part and minus terminal connecting terminal) to be electrically connected to the terminal 110 of the battery cell 11. Land position) and the position in the parallel direction are made the same. Therefore, the interval between the land portions 21 in the parallel direction is substantially equal to the interval between the terminals 110 in the direction. As long as the substrate 20 is disposed at a position that satisfies the above conditions, the fixing structure is not limited to a specific structure. In the present embodiment, the substrate 20 is fixed to the substrate support portion 12 provided at the center in the width direction of the battery stack 10. The shape of the substrate support portion 12 and the structure for fixing the substrate 20 to the substrate support portion 12 may be anything.

  The wiring member 30 is a member for electrically connecting the conductive pattern (circuit) formed on the substrate 20 and the terminal 110 of each battery cell 11. Since it is necessary to measure the voltage of each battery cell 11, a plurality of wiring members 30 (the number of battery cells 11 × 2) are used. In the wiring member 30 in the present embodiment, a battery-side connection terminal portion 32 connected to the terminal 110 of the battery cell 11 is provided at one end portion of the electric wire 31, and the land portion 21 of the substrate 20 is provided at the other end portion. A board-side connection terminal portion 33 to be connected is provided.

  The wiring holding member 40 is a member that regulates the interval between the wiring members 30 (strictly, the interval between a part of the wiring members 30). Specifically, it is a member that connects a plurality of wiring members 30 positioned on one side in the width direction and a plurality of wiring members 30 positioned on the other side in the width direction. The plurality of wiring members 30 are fixed to the wiring holding member 40 so as to be arranged at equal intervals in the parallel direction. The wiring holding member 40 in the present embodiment is a film-like member formed of an insulating flexible material, and two film-like members, a first holding part 41 and a second holding part 42, are joined. It will be. The plurality of wiring members 30 are fixed to the wiring holding member 40 by being sandwiched between the first holding portion 41 and the second holding portion 42.

  The structure for fixing the plurality of wiring members 30 to the wiring holding member 40 may be, for example, as shown in FIG. As a material for the wiring holding member 40, a material in which the first holding portion 41 and the second holding portion 42 are line-symmetrical at the center is manufactured (see FIG. 4A). The wiring members 30 are arranged in one holding portion, the other holding portion is folded back along a symmetry line (see FIG. 4B), and joined to one holding portion (see FIG. 4C). Thereby, the plurality of wiring members 30 are fixed to the wiring holding member 40 (the wiring module 2a according to the first embodiment of the present invention is such that the plurality of wiring members 30 are fixed to the wiring holding member 40 in this way. (Corresponding to (2)). In addition, as long as the wiring member 30 is fixed between the two holding portions, three or more holding portions may be used. Further, only the wiring fixing portion 45 described later may be configured by two holding portions.

  The wiring holding member 40 includes a board connecting part 43, a relay part 44, and a wiring fixing part 45. The board connecting part 43 is a part connected to the board 20. The relay portion 44 is a portion that connects the substrate connection portion 43 and the wiring fixing portion 45. The wiring fixing part 45 is a part to which the wiring member 30 is fixed. A part of the electric wire 31 of the wiring member 30 is fixed to the wiring fixing portion 45. That is, a part of the wiring member 30 on the battery side connecting terminal portion 32 side and the substrate side connecting terminal portion 33 side is not fixed to the wiring holding member 40 (wiring fixing portion 45). That is, the portion of the battery cell 11 that is closer to the terminal 110 than the portion of the wiring member 30 that is fixed to the wiring holding member 40 (hereinafter referred to as the first extra length portion 301; see FIG. 3), and the wiring holding member of the wiring member 30. A portion closer to the substrate 20 than the portion fixed to 40 (hereinafter referred to as a second extra length portion 302; see FIG. 3) is a portion that is not restricted by the wiring holding member 40. Therefore, the first surplus length portion 301 and the second surplus length portion 302 can move independently without being restricted by the wiring holding member 40 (wiring fixing portion 45).

  Each said relay part 44 is provided so that it may be located between 2nd surplus length parts 302 of each wiring member 30. FIG. In the present embodiment, a hollow portion 441 that is a through hole is formed in the relay portion 44 in order to facilitate the deformation of the relay portion 44. The board connecting part 43 formed on the board 20 side with respect to the relay part 44 is bonded to the board 20 with an adhesive or the like. You may join by photocuring or thermosetting. The board connecting portion 43 is joined to the board 20 so as to be positioned between the board side connecting terminal portions 33 connected to the land portion 21. In order to increase the connection strength between the substrate 20 and the wiring holding member 40, the substrate connection portion 43 is preferably formed wider than the relay portion 44. In a state where the substrate 20 is positioned at a predetermined position with respect to the battery stack 10 and the wiring member 30 and the wiring holding member 40 are connected to the predetermined position with respect to the substrate 20, the length of the first surplus length portion 301 is The battery side connection terminal portion 32 of the wiring member 30 is set to a length that cannot be connected to the terminal 110 other than the terminal 110 of the corresponding battery cell 11.

  A slit 451 is formed in the wiring holding member 40. In the present embodiment, a slit 451 is formed from the outer edge in the width direction of the wiring fixing portion 45 toward the inner side in the width direction (opened toward the terminal 110 side of the battery cell 11). One or more slits 451 are formed between the wiring members 30. The length of the first extra length portion 301 is set in consideration of the presence of the slit 451 and the hollow portion 441, the flexibility of the material constituting the wiring holding member 40, and the like. That is, the range in which the battery side connection terminal portion 32 can move is determined by the flexibility of the material constituting the slit 451 and the wiring holding member 40, etc. The length is set such that it cannot be connected to a terminal 110 other than the terminal 110 of the corresponding battery cell 11.

  The battery unit 1a according to the present embodiment can be assembled as follows. A plurality of battery cells 11 are arranged to constitute a battery stack 10 (first step). Further, the plurality of wiring members 30 and the wiring holding member 40 are integrated. That is, the plurality of wiring members 30 are sandwiched and fixed between the first holding part 41 and the second holding part 42 (second process). An example of this fixing method is as described above (the method shown in FIG. 4). The order of the first step and the second step does not matter. After passing through the second step, the board-side connection terminal portion 33 of each wiring member 30 is soldered to the land portion 21 of the substrate 20 and the substrate connection portion 43 of the wiring holding member 40 is joined to the substrate 20 (third step). ). Thereby, a unit in which the substrate 20, the wiring member 30 and the wiring holding member 40 are integrated is obtained. After the third step, the substrate 20 is attached to a predetermined position (in this embodiment, supported by the substrate support portion 12), and the battery side connection terminal portion 32 of each wiring member 30 is connected to each terminal 110 of the battery cell 11. (4th process). That is, the plurality of wiring members 30 positioned on one side in the width direction of the substrate 20 are connected to the first terminal group 111, and the wiring member 30 positioned on the other side is connected to the second terminal group 112. After the fourth step, the lid member 50 is fixed to the battery stack 10 (fifth step). That is, each hook piece 51 is hooked on the corresponding hook protrusion 113. At this time, the wiring member 30 is accommodated in the space between the lid member 50 and the battery stack 10 together with the substrate 20.

  In the battery unit 1a according to the present embodiment described above, the wiring 110 is easy because the terminal 110 of each battery cell 11 and the land portion 21 arranged in the same direction as the terminal 110 are connected by the wiring member 30. It is. Further, since the wiring member 30 is not largely routed, the stress generated at the connection portion between the wiring member 30 and the land portion 21 is reduced. Furthermore, since the space | interval of the land parts 21 in the board | substrate 20 can be enlarged, the possibility that it may short-circuit between the land parts 21 is reduced.

  Moreover, in this embodiment, since the some wiring member 30 is being fixed to the wiring holding member 40, it is prevented that the wiring members 30 get entangled in the case of wiring work. Since the wiring holding member 40 is formed of a flexible material, the degree of freedom in routing the wiring member 30 is improved as long as the distance between the wiring members 30 is maintained. Therefore, wiring work becomes easy.

  Further, since each wiring member 30 is provided with a first surplus length portion 301 that is a portion on the terminal 110 side of the battery cell 11 that is not fixed to the wiring holding member 40, Thus, the battery side connection terminal portion 32 of the wiring member 30 can move. Therefore, even if the position of the terminal 110 of each battery cell 11 is slightly shifted due to a stacking error of the battery cell 11 or the like, the one end of the wiring member 30 and the terminal 110 can be easily connected (absorbing the error). Moreover, after connecting the wiring member 30 and the terminal 110 of the battery cell 11, the stress which arises in the connection part of the wiring member 30 and the terminal 110 by the presence of the said 1st extra length part 301 is reduced.

  Further, the length of the first extra length portion 301 is set so that the battery side connection terminal portion 32 of each wiring member 30 cannot be connected to the terminal 110 other than the terminal 110 of the corresponding battery cell 11. This prevents the wiring member 30 from being connected to another terminal 110 by mistake.

  In addition, each wiring member 30 is provided with a second extra length portion 302 that is a portion closer to the substrate 20 than the portion fixed to the wiring holding member 40, so that the connection portion between the wiring member 30 and the land portion 21 is provided. The stress generated in the (soldered part) is reduced.

  Further, since the wiring holding member 40 (at least the wiring fixing portion 45 thereof) is composed of two film-like members, the first holding portion 41 and the second holding portion 42, the wiring member 30 is interposed between the two holding portions. By sandwiching, the wiring member 30 can be fixed to the wiring holding member 40, and manufacture (the second step) is easy.

  Further, if the slit 451 is formed in the wiring holding member 40, the stress generated in the connection portion between the wiring member 30 and the land portion 21 and between the wiring member 30 and the terminal 110 is reduced. In particular, if the slit 451 is formed from the outer edge in the width direction of the wiring fixing portion 45 toward the inner side in the width direction (opened toward the terminal 110 side of the battery cell 11) as in the present embodiment, the wiring member The stress generated in the connection portion between the terminal 30 and the terminal 110 is reduced. In addition, unlike the present embodiment, if the slit 451 is formed from the inner edge in the width direction of the wiring fixing portion 45 toward the outer side in the width direction (opened toward the substrate 20 side), the wiring member 30 and the like in particular. The stress generated in the connection part (soldering part) of the land part 21 is reduced.

  Further, since the board connecting portion 43 of the wiring holding member 40 is connected to the board 20, the connection between the wiring member 30 and the land portion 21 (board 20) is reinforced (occurs at the connecting portion between the wiring member 30 and the land portion 21). The wiring holding member 40 functions as a member for reducing stress.

  In addition, if the hollow portion 441 is provided in the relay portion 44 of the wiring holding member 40, the relay portion 44 is easily deformed. Therefore, the connection portion between the wiring member 30 and the land portion 21 and between the wiring member 30 and the terminal 110 is provided. The resulting stress is reduced.

  Next, the battery unit 1b according to the second embodiment of the present invention will be described focusing on differences from the first embodiment. The battery unit 1b according to this embodiment shown in FIGS. 5 and 6 is different from the first embodiment in the configuration of the wiring holding member 40b.

  The wiring holding member 40b in this embodiment is formed of an insulating hard material. The wiring holding member 40b is a rectangular parallelepiped member elongated in the parallel direction. The length of the wiring holding member 40b in the parallel direction is substantially the same as that of the substrate 20b and the battery stack 10.

  A plurality of wiring members 30b are fixed to the wiring holding member 40b (in this way, a plurality of wiring members 30b fixed to the wiring holding member 40b is the wiring module 2b according to the second embodiment of the present invention ( 2)). Any fixing structure may be used. For example, the plurality of wiring members 30b can be fixed to the wiring holding member 40b in a state of being arranged at equal intervals by insert molding. The board-side connection terminal portion 33b of the wiring member 30b in the present embodiment is a shaft-like portion formed of a conductive hard material. The board-side connection terminal portion 33b protrudes from the board placement surface 47b (surface on the board 20b side) that is the upper surface of the wiring holding member 40b. That is, the board side connection terminal portions 33b are arranged at equal intervals along the longitudinal direction (parallel direction) of the wiring holding member 40b. In addition, the battery side connection terminal part 32 is pulled out from the lower surface of the wiring holding member 40b. The extracted portion is the first extra length portion 301.

  The interval between the substrate side connection terminal portions 33b is the same as the interval between the land portions 21b formed so as to be arranged in parallel in both sides in the width direction of the substrate 20b. A plurality of through holes 22b (through holes) arranged in the parallel direction are formed on both sides in the width direction of the substrate 20b in the present embodiment, and each land portion 21b is formed around each through hole 22b.

  This substrate 20b is placed on the upper surface (substrate placement surface 47b) of two wiring holding members 40b provided on both sides in the width direction. Specifically, by passing each board side connection terminal portion 33b protruding from the board placement surface 47b of the wiring holding member 40b through each through hole 22b formed in the board 20b, the board 20b is placed on the wiring holding member 40b. Placed on.

  The battery unit 1b according to the present embodiment can be assembled as follows. A plurality of battery cells 11 are arranged to constitute a battery stack 10 (first step). Moreover, the some wiring member 30b and the wiring holding member 40b are integrated (2nd process). The order of the first step and the second step is not limited. After the second step, the board-side connection terminal portion 33b of each wiring member 30b is soldered to the land portion 21b of the substrate 20b (third step). In order to reduce the stress applied to the soldered portion, the upper surface (substrate mounting surface 47b) of the wiring holding member 40b and the substrate 20b may be joined. In this case, the upper surface (substrate mounting surface 47b) of the wiring holding member 40b serves as a substrate connection portion. Thus, a unit in which the substrate 20b, the wiring member 30b, and the wiring holding member 40b are integrated is obtained. In this embodiment, since the board | substrate 20b can be mounted on the wiring holding member 40b, soldering is easy. Joining the wiring holding member 40b and the substrate 20b with an adhesive or the like is even better because the stress applied to the soldered portion is reduced. After the third step, the substrate 20b is attached to a predetermined position (in this embodiment, supported by the substrate support portion 12), and the battery side connection terminal portion 32 of each wiring member 30b is connected to each terminal 110 of the battery cell 11. (4th process). That is, the plurality of wiring members 30b located on one side in the width direction of the substrate 20b are connected to the first terminal group 111, and the wiring member 30b located on the other side are connected to the second terminal group 112. After the fourth step, the lid member 50 is fixed to the battery stack 10 (fifth step). That is, each hook piece 51 is hooked on the corresponding hook protrusion 113. At this time, the wiring member 30b is accommodated in the space between the lid member 50 and the battery stack 10 together with the substrate 20b.

  Since the wiring holding member 40b is formed of a hard material, the battery unit 1b according to the present embodiment described above is excellent in the function of maintaining the interval between the wiring members 30b by the wiring holding member 40b.

  In addition, since the wiring holding member 40b is formed of a hard material, the wiring holding member 40b can also function as a member for supporting the substrate 20b. In particular, in the present embodiment, since the wiring member 30b is provided with the board-side connection terminal portion 33b that protrudes from the board placement surface 47b of the wiring holding member 40b to the board 20b side, the board 20b (land part 21b) and the wiring are provided. Connection of the member 30b becomes easy.

  In the present embodiment, a hooking portion 46b as shown in FIG. 7 can be provided on the outer surface in the width direction of each of the two wiring holding members 40b. The hook portion 46b has a portion extending outward in the width direction and a portion extending upward from the tip. When the first surplus length portion 301 is set to be long (set to a length with a margin) in order to facilitate the connection between the battery side connection terminal portion 32 of the wiring member 30b and the terminal 110 of the battery cell 11. After the connection of the battery side connection terminal portion 32 of the wiring member 30b and the terminal 110 of the battery cell 11, the first surplus length portion 301 (the electric wire 31) is hooked on the hook portion 46b. It can suppress that the long part 301 moves largely. That is, the load applied to the connection portion between the battery side connection terminal portion 32 of the wiring member 30b and the terminal 110 of the battery cell 11 is reduced.

  Further, when the wiring holding member 40b is formed of a hard material and a plurality of substrates 20b are mounted on one unit as in the present embodiment, the substrate relay that electrically connects the substrates 20b. The member 23b can be fixed to the wiring holding member 40b. For example, as shown in FIG. 8, a U-shaped substrate relay member 23b is embedded between a certain substrate 20b and a substrate 20b adjacent thereto in the wiring holding member 40b. Part of the two leading end sides of the board relay member 23b (tip portion 231b) protrudes from the upper surface of the wiring holding member 40b. Each substrate 20b is formed with a through hole 22b through which the protruding portion passes and a land portion 21b around the through hole 22b, and two distal end portions 231b of the substrate relay member 23b are soldered to the land portion 21b. As a result, the substrates 20b (conductive patterns formed on the substrate 20b) are electrically connected to each other. If an automatic apparatus is used, the soldering of the board | substrate relay member 23b and the board | substrate 20b can be performed in the same process as the soldering of the wiring member 30b and the board | substrate 20b.

  Next, the battery unit 1c according to the third embodiment of the present invention will be described focusing on differences from the first embodiment. The battery unit 1c according to this embodiment shown in FIG. 9 is different from the first embodiment in the configuration of a plurality of wiring members 30c.

  The plurality of wiring members 30c in the present embodiment are conductive patterns formed on the flexible substrate 2c. The flexible substrate 2 c is formed so that the length in the parallel direction is substantially the same as that of the substrate 20 and the battery stack 10. A plurality of conductive patterns arranged at equal intervals in the parallel direction are formed on the flexible substrate 2c. Each conductive pattern is formed so as to cross the flexible substrate 2c in the width direction. One end of each conductive pattern is connected to each land portion 21 of the substrate 20, and the other end is connected to each terminal 110 of the battery cell 11. Thus, if the wiring member 30c is a conductive pattern formed on the substrate 20, the spacing between the wiring members 30c does not change. That is, the base material 35c of the flexible substrate 2c plays the same role as the wiring holding member 40 in the first embodiment and the second embodiment described above (a flexible substrate on which a conductive pattern is formed as the wiring member 30c). 2c corresponds to the wiring module 2c (2) according to the third embodiment of the present invention).

  In the flexible substrate 2c in the present embodiment, a slit 36c is formed from the edge on the outer side in the width direction (terminal 110 side of the battery cell 11) toward the inner side in the width direction (opening toward the terminal 110 side of the battery cell 11). . Each slit 36c is formed in the center between each conductive pattern which is the wiring member 30c.

  The battery unit 1c according to the present embodiment can be assembled as follows. A plurality of battery cells 11 are arranged to constitute a battery stack 10 (first step). Further, a conductive pattern to be the wiring member 30c is formed on the flexible substrate 2c (second process). The order of the first step and the second step is not limited. After the second step, the board-side connection terminal portion 33 of each wiring member 30c (conductive pattern) formed on the flexible substrate 2c is soldered to the land portion 21 of the substrate 20 (rigid board) (third step). In order to reduce the stress applied to the soldered portion, a portion other than the soldered portion on the flexible substrate 2 c may be joined to the substrate 20. In this case, the location becomes the substrate connection portion 43. Thereby, a unit in which the substrate 20 and the wiring member 30c are integrated is obtained. After the third step, the substrate 20 (rigid substrate) is attached to a predetermined position (in this embodiment, supported by the substrate support portion 12), and the battery side connection terminal portion 32 of each wiring member 30c (conductive pattern) is connected to the battery. Connect to each terminal 110 of the cell 11 (fourth step). That is, a plurality of wiring members 30c (conductive pattern) positioned on one side in the width direction of the substrate 20 are connected to the first terminal group 111, and a wiring member 30c (conductive pattern) positioned on the other side is connected to the second terminal group 112. . After the fourth step, the lid member 50 is fixed to the battery stack 10 (fifth step). That is, each hook piece 51 is hooked on the corresponding hook protrusion 113. At this time, the wiring member 30 c is accommodated in the space between the lid member 50 and the battery stack 10 together with the substrate 20.

  The battery unit 1c according to the present embodiment described above uses the plurality of wiring members 30c as conductive patterns formed on the flexible substrate 2c, that is, the plurality of wiring members 30c (wiring holding members) of the flexible substrate 2c. Since the members 30c are integrated, the wiring members 30c are not entangled and the wiring work is facilitated. Moreover, since the process of fixing the multiple wiring members 30c to the wiring holding member 40 is eliminated as in the first embodiment and the second embodiment (the conductive pattern may be formed on the flexible substrate 2c), the unit can be manufactured. It becomes easy.

  In addition, a slit 36c is formed between each wiring member 30c (conductive pattern) in the flexible substrate 2c from the outer edge in the width direction toward the inner side in the width direction (opening toward the terminal 110 side of the battery cell 11). As the slit 36c is formed, a range in which the battery side connection terminal portion 32 can move is widened. Therefore, the operation | work (4th process) which connects the battery side connection terminal part 32 to each terminal 110 of the battery cell 11 becomes easy. Further, the stress generated at the connection portion between the wiring member 30c and the terminal 110 is reduced.

  In addition, when reducing the stress which arises in the connection part of the wiring member 30c (conductive pattern) and the land part 21, between each wiring member 30c (conductive pattern) in the flexible substrate 2c, it is width direction from the edge inside a width direction. A slit 36c that is directed outward (opened toward the substrate 20) may be formed.

  As mentioned above, although embodiment of this invention was described in detail, this invention is not limited to the said embodiment at all, A various change is possible in the range which does not deviate from the summary of this invention.

1 (1a to 1c) Battery unit 2 (2a to 2c) Wiring module 10 Battery stack (electrical equipment)
11 Battery cell 110 Terminal 20 Substrate 21 Land part (part of conductive pattern)
30 wiring member 31 electric wire 32 battery side connection terminal portion 33 substrate side connection terminal portion 301 first surplus length portion 302 second surplus length portion 40 wiring holding member 41 first holding portion 42 second holding portion 43 substrate connecting portion 44 relay portion 45 Wiring fixing portion 451 Slit 20b Substrate 21b Land portion (part of conductive pattern)
22b Through hole 23b Substrate relay member 30b Wiring member 33b Substrate side connection terminal portion 40b Wiring holding member 46b Hooking portion 30c Wiring member (conductive pattern)
2c Flexible substrate 35c Base material (wiring holding member)
36c slit

Claims (14)

A wiring module for connecting an electrical device and a board,
A member for electrically connecting a plurality of terminals provided in the electric device and a conductive pattern formed on the substrate, and a plurality of wiring members having an electric wire that can be bent and deformed ;
A plurality of wiring members are fixed, and a wiring holding member that regulates an interval between the wiring members;
Equipped with a,
The plurality of wiring members are:
A portion where the electric wire is fixed to the wiring holding member;
The portion that is closer to the electrical device than the portion that is fixed to the wiring holding member, and includes a portion that the electric wire is not fixed to the wiring holding member, and can move freely without being restricted by the wiring holding member. A first surplus part,
Wiring module characterized in that it comprises a. 2. The wiring module according to claim 1 , wherein the length of the first surplus portion is a length at which one end of each wiring member cannot be connected to a terminal other than the corresponding terminal. The plurality of wiring members are:
A portion fixed to the wiring holding member;
A portion of the substrate side relative to the portion fixed to the wiring holding member, and a second extra length portion not fixed to the wiring holding member;
The wiring module according to claim 1 , further comprising: The wiring module according to any one of claims 1 to 3 , wherein the wiring holding member is made of a flexible material. The wiring holding member has a first holding part and a second holding part made of a flexible material,
The wiring module according to claim 4 , wherein the wiring member is fixed to the wiring holding member by being sandwiched between the first holding portion and the second holding portion. The wiring module according to claim 4, wherein a slit is formed in the wiring holding member. The wiring module according to any one of claims 1 to 3 , wherein the wiring holding member is made of a hard material. A wiring module for connecting an electrical device and a board,
A plurality of wiring members for electrically connecting a plurality of terminals provided in the electrical device and a conductive pattern formed on the substrate;
A plurality of wiring members are fixed, and a wiring holding member formed of a hard material that regulates the interval between the wiring members;
Equipped with a,
A wiring module , wherein a substrate mounting surface on which the substrate is mounted is provided on the wiring holding member . The wiring module according to claim 8 , wherein the wiring member has a board-side connection terminal portion that protrudes from the board mounting surface of the wiring holding member and is connected to the conductive pattern. The wiring module according to claim 8 or 9 , wherein a board relay member that electrically connects conductive patterns formed on each of the plurality of boards is embedded in the wiring holding member. The plurality of wiring members are:
A portion fixed to the wiring holding member;
A first surplus portion that is a portion closer to the electric device than a portion fixed to the wiring holding member and is not fixed to the wiring holding member;
Have
The wiring module according to any one of claims 8 to 10 , wherein the wiring holding member is provided with a hook portion on which the first extra length portion is hooked. The wiring module according to any one of claims 1 to 11 , wherein the wiring holding member includes a board connecting portion connected to the board. The wiring module according to any one of claims 1 to 12 ,
It said substrate conductive pattern is formed,
A battery stack, which is the electrical device composed of a plurality of battery cells;
With
One end of each of the plurality of wiring members is connected to each terminal of the plurality of battery cells, and the other end is connected to the conductive pattern. A plurality of land portions that are part of the conductive pattern are formed on the substrate so as to be aligned along a parallel direction of the plurality of battery cells,
Each of the plurality of wiring members has one end connected to each terminal of the plurality of battery cells and the other end connected to each land portion so as to be arranged along the parallel direction of the plurality of battery cells. The battery unit according to claim 13 .

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