JP5776935B2 - Battery wiring module and battery module temperature control system - Google Patents

Battery wiring module and battery module temperature control system Download PDF

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Publication number
JP5776935B2
JP5776935B2 JP2011193931A JP2011193931A JP5776935B2 JP 5776935 B2 JP5776935 B2 JP 5776935B2 JP 2011193931 A JP2011193931 A JP 2011193931A JP 2011193931 A JP2011193931 A JP 2011193931A JP 5776935 B2 JP5776935 B2 JP 5776935B2
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surface
portion
unit cell
bus bar
protector
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JP2013054996A (en
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治 中山
治 中山
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株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage

Description

  The present invention relates to a battery wiring module and a battery module temperature adjustment system.

In battery modules for electric vehicles and hybrid vehicles, a plurality of single cells having positive and negative electrode terminals are arranged side by side. In such a battery module, a plurality of single cells are electrically connected by connecting a positive electrode terminal (positive electrode terminal) and a negative electrode terminal (negative electrode terminal) with a bus bar. .
In order to electrically connect a plurality of single cells, for example, a battery wiring module as described in Patent Document 1 is used.

JP 2011-8955 A

  The battery wiring module described in Patent Document 1 includes members such as a bus bar and a voltage detection line, and a protector made of a synthetic resin for holding and housing these members. It is assembled in such a way that it covers the terminal side surface. Here, since a large current flows through the bus bar connecting the electrode terminals when energized, the amount of heat generated from the bus bar is also large. At this time, if the temperature between the unit cell and the battery wiring module becomes high and the temperature becomes high, for example, the protector is softened by the heat and deformed, or the cell performance of the unit cell is adversely affected. There was a fear.

  The present invention has been completed based on the above-described circumstances, and an object thereof is to prevent heat from being accumulated between the cells.

  The battery wiring module of the present invention is configured to hold a plurality of connecting members that connect adjacent electrode terminals of a plurality of single cells having positive and negative electrode terminals, and a plurality of the connecting members. A protector assembled in a form opposed to the unit cell, a first surface opposed to the unit cell, the unit cell opposed to the unit cell, and the unit cell more than the first surface And a second surface having a ventilation space with the unit cell.

  By doing so, a large amount of current flows through the plurality of connecting members that connect the adjacent electrode terminals of the plurality of single cells with energization, and the amount of heat generated is also large. Even in that case, since the ventilation space is held between the second surface and the single cell, which is relatively larger in distance from the single cell than the first surface, the connection member is provided by this ventilation space. The heat from can be dissipated. By increasing the heat dissipation of the connecting member in this way, it is possible to prevent heat from being accumulated between the unit cells, for example, the protector is deformed by heat, the cell performance of the unit cell is adversely affected, etc. Can be prevented.

As an embodiment of the battery wiring module of the present invention, the following configuration is preferable.
(1) A detection terminal that is superimposed on the connection member and connected to a terminal portion of the electric wire is provided, and the protector includes a connection member holding portion that holds the connection member, and the electric wire connected to the detection terminal. The first surface is formed in the wire passage portion, while the second surface is formed in the connection member holding portion. In this way, since a signal for detection is transmitted to the electric wire connected to the detection terminal, the current value of the flowing current is extremely small compared to the connection member. Therefore, since the calorific value from the said electric wire is also small, it is preferable to form a 1st surface in the electric wire passage part through which an electric wire is passed among protectors. On the other hand, the connection member holding portion that holds the connection member of the protector is formed with a second surface having a ventilation space between the unit cells, thereby generating a large amount of heat generated from the connection member. Can be efficiently diffused.

(2) Continuing from the first surface of the wire passage portion and the second surface of the connection member holding portion, and projecting toward the unit cell from the first surface and the second surface. The reinforcing portion is provided such that the portion connected to the second surface has a relatively larger distance from the unit cell than the portion connected to the first surface. Is formed. If it does in this way, reinforcement of the protector which consists of a wire passage part which has the 1st surface, and a connection member holding part which has the 2nd surface by a reinforcement part can be aimed at. The reinforcing portion protrudes from the first surface and the second surface toward the unit cell side, but the distance between the second cell and the unit cell is more relative to the unit cell than the portion connected to the first surface. Therefore, it is suitable for securing a ventilation space, and sufficient heat dissipation performance can be obtained.

(3) The reinforcing portion is formed in a tapered shape so that a distance from the unit cell increases in a direction approaching the connection member holding portion from the wire passage portion. If it does in this way, since ventilation space becomes so large that it approaches a connection member holding part, heat dissipation performance can be improved more.

(4) A rectifying plate is provided that protrudes at least toward the unit cell from the second surface and sandwiches the ventilation space with the wire passage portion. If it does in this way, a rectification | straightening effect | action can be provided to the air which flows in a ventilation space by the baffle plate which pinches | interposes ventilation space between electric wire passage parts. Thereby, higher heat dissipation performance can be obtained.

(5) The said baffle plate is made into the form extended along the row direction of the said some connection member. If it does in this way, since the air which exists in ventilation space will flow along the arrangement direction of a plurality of connecting members with a current board, a plurality of connecting members can be radiated more efficiently. .

(6) The rectifying plate is configured to protrude to the unit cell side from the first surface. If it does in this way, since the rectification | straightening effect | action given to the air which exists in ventilation space by a baffle plate will become a higher thing, heat dissipation performance can further be improved.

(7) The current plate is integrally formed with the protector. In this way, as compared with the case where the rectifying plate is a separate component from the protector, the positional relationship of the rectifying plate with respect to the second surface is not displaced, so that stable rectifying performance can be obtained. it can.

(8) The protector is provided with a cover that covers the connection member, the detection terminal, and the electric wire by being attached from the side opposite to the unit cell side, and the rectifying plate is provided with the cover Are integrally formed. If it does in this way, since the thing of the existing structure can be diverted as a protector, it becomes suitable for aiming at cost reduction.

(9) The protector holds the connection member, and a plurality of connection member holding portions each having a side wall portion that rises toward the side opposite to the unit cell side communicate with the ventilation space. The side walls are arranged side by side so as to have a communication space, and the side wall is provided with a vent opening that opens into the communication space. In this way, heat from the connecting member is efficiently dissipated into the ventilation space through the ventilation opening provided in the side wall and the communication space, so that the heat dissipation performance can be further improved.

(10) The protector is formed with a ventilation introduction port through which the ventilation from the blower can be introduced into the ventilation space by communicating with the ventilation space. If it does in this way, the temperature which concerns on ventilation space can be adjusted appropriately by ventilating from ventilation apparatus to ventilation space through ventilation introduction port.

  Next, in order to solve the above problem, a battery module temperature adjustment system of the present invention includes the above-described battery wiring module, a plurality of single cells, and a blower capable of blowing air into the ventilation space.

  According to such a battery module temperature adjustment system, the temperature which concerns on a cell and a battery wiring module can be adjusted appropriately by ventilating to ventilation space with an air blower.

As an embodiment of the battery module temperature control system of the present invention, the following configuration is preferable.
(1) The blower can blow at least cool air. If it does in this way, high heat dissipation performance will be obtained by blowing cold air to ventilation space by a blower.

(2) The blower can selectively blow cool air and warm air. In this way, in order to suppress the heat generation of the connecting member, heat is radiated by blowing cool air from the blower to the ventilation space, and when the unit cell is inactivated under a low temperature environment, The cell can be activated by blowing warm air from the blower to the ventilation space.

  According to the present invention, it is possible to prevent heat from being accumulated between the single cells.

The top view of the battery module which concerns on Embodiment 1 of this invention. Plan view with battery wiring module assembled Top view of bus bar Plan view of a state in which a plurality of cells are arranged in parallel Top view of the connecting units that make up the protector Bottom view of the connecting units that make up the protector 2 is a cross-sectional view taken along the line vii-vii in FIG. 2 showing a state before the battery wiring module is assembled to the unit cell. 2 is a cross-sectional view taken along the line vii-vii in FIG. 2 showing a state after the battery wiring module is assembled to the unit cell. 2 is a cross-sectional view taken along the line ix-ix in FIG. 2 showing a state before the battery wiring module is assembled to the unit cell. 2 is a cross-sectional view taken along line ix-ix in FIG. 2 showing a state after the battery wiring module is assembled to the unit cell. Side view showing the state before the battery wiring module is assembled to the unit cell Side view showing the state after the battery wiring module is assembled to the unit cell The top view of the battery module which concerns on Embodiment 2 of this invention. Sectional view taken along line xiv-xiv in Fig. 13 in the protector Xv-xv cross-sectional view of the protector in Fig. 13 The side view of the battery module which concerns on Embodiment 3 of this invention. The top view of the battery module temperature control system which concerns on Embodiment 4 of this invention. Side view of battery module temperature control system

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the battery wiring module 20 of the present embodiment is attached to a unit cell group in which a plurality of unit cells 11 are arranged to form a battery module 10. For example, it is used as a drive source for vehicles such as electric vehicles and hybrid vehicles. In addition, a part of each drawing shows an X axis, a Y axis, and a Z axis, and each axis direction is drawn to be a direction shown in each drawing. The upper and lower descriptions are based on FIGS.

(Battery module)
As shown in FIG. 1, the battery module 10 includes, for example, a plurality of unit cells 11 (unit cell group) arranged side by side and a battery wiring module 20 attached to the plurality of unit cells 11. ing.

(Single cell)
As shown in FIG. 4, the unit cell 11 protrudes from a rectangular parallelepiped main body part 11 a in which a power generation element (not shown) is accommodated, and a predetermined surface (upper surface) of the main body part 11 a and is along the Y-axis direction. A positive or negative electrode portion 12, 13 arranged side by side, and a voltage detection electrode portion 14 provided on the main body portion and projecting at a substantially intermediate position between the two electrode portions 12, 13. I have. Each of the electrode portions 12, 13, and 14 is formed of a square tube nut (square nut), a screw hole is formed through the center, and the periphery excluding the upper and lower sides is covered with an insulating member made of synthetic resin. It is set as part 12a, 13a, 14a.

  The plurality of unit cells 11 are arranged side by side along the X-axis direction so that the front-rear direction (Y-axis direction) of the adjacent unit cells 11 are opposite to each other. The polarities of the matching electrode parts 12 and 13 are different (the positive electrode and the negative electrode are alternately arranged in the arrangement direction (X-axis direction) of the unit cells 11). The plurality of unit cells 11 are fixed by a holding plate (not shown).

(Battery wiring module)
As shown in FIGS. 1 and 2, the battery wiring module 20 includes a plurality of bus bars 21 (corresponding to connecting members) that connect between the electrode parts 12 and 13 that are adjacent to each other in the X-axis direction, A plurality of voltage detection terminals 25 for detecting the voltage of the unit cells 11 that are stacked, a plurality of intermediate voltage detection terminals 26 for detecting the voltage of the unit cells 11 that are stacked on the voltage detection electrode unit 14, and a bus bar 21 and a protector 30 made of synthetic resin that accommodates the voltage detection terminals 25 and 26.

(Bus bar)
The bus bar 21 is made of a metal such as copper, copper alloy, stainless steel (SUS), aluminum, and has a plate shape with a length corresponding to the dimension between the adjacent electrode portions 12 and 13 as shown in FIG. A pair of through holes 22 communicating with the screw holes of the electrode portions 12 and 13 is formed. The shape of the through hole 22 is an oval shape whose longitudinal direction is the connecting direction (X-axis direction, left-right direction in FIG. 3). Then, at the side edges along the connecting direction of the bus bar 21 and on both the front and rear sides of the through hole 22, an engaged recess 23 is cut out.

(Voltage detection terminal)
As shown in FIG. 1, each voltage detection terminal 25, 26 is electrically connected to a corresponding electrode portion 12, 13, 14 by a pair of voltage detection terminals 25 or a voltage detection terminal 25 and an intermediate voltage detection terminal 26. By connecting, a desired voltage in each unit cell 11 is detected. First, the voltage detection terminal 25 superimposed on the bus bar 21 will be described. The voltage detection terminal 25 is provided with a rectangular flat plate portion and a crimp portion provided so as to protrude from the flat plate portion, and the voltage detection wire W1 is crimped to the crimp portion. Yes. An oblong insertion hole communicating with the screw hole of the electrode portion 12 and the through hole 22 is formed through the central portion of the flat plate portion.

  On the other hand, as shown in FIGS. 1 and 2, the intermediate voltage detection terminal 26 superimposed on the voltage detection electrode portion 14 has a rectangular flat plate portion slightly smaller than the flat plate portion of the voltage detection terminal 25 described above, and A crimping portion provided so as to protrude from the flat plate portion is provided, and a voltage detection wire W2 is crimped to the crimping portion. An oblong insertion hole communicating with the screw hole of the voltage detection electrode portion 14 is formed through the central portion of the flat plate portion.

  The voltage detection wires W1 and W2 connected to the voltage detection terminals 25 and 26 are collected in a wire passage portion 34, which will be described later, and are provided on the right side in the X-axis direction of FIG. Connected to a battery ECU (not shown). The battery ECU is equipped with a microcomputer, elements, and the like, and has a function of detecting the voltage, current, temperature, etc. of the unit cells 11 and performing monitoring control of each unit cell 11 and the like. The structure is made.

(Protector)
As shown in FIG. 1, the protector 30 is formed by connecting a plurality of connecting units 31 made of synthetic resin to each other, and as a whole, is elongated along the arrangement direction (X-axis direction) of the cells 11. I am doing. The protector 30 is configured to hold electric wires W1 and W2 in addition to the bus bar 21 and the voltage detection terminals 25 and 26 connected to the unit cell 11. Specifically, each connecting unit 31 constituting the protector 30 includes a bus bar holding portion 32 that holds the bus bar 21, an intermediate holding portion 33 that holds the intermediate voltage detection terminal 26, and an electric wire passage portion that holds the electric wires W1 and W2. 34 is provided. In the bus bar holding part 32, the voltage detection terminal 25 arranged so as to overlap the bus bar 21 is held together with the bus bar 21.

(Bus bar holding part 32)
As shown in FIG. 1, a plurality of bus bar holding portions 32 are provided side by side along the arrangement direction (X-axis direction) of the cells 11 in the protector 30 to form one row. The protector 30 is provided with a pair of bus bar holding portions 32 at outer end positions in the Y-axis direction. In other words, the protector 30 has an arrangement configuration in which the intermediate holding part 33 and the wire passing part 34 are sandwiched between the rows of the pair of bus bar holding parts 32 in the Y-axis direction. A predetermined communication space S1 is held between the bus bar holding portions 32 adjacent to each other in the X-axis direction, and the adjacent bus bar holding portions 32 are connected to each other by a connecting wall 35 arranged across the communication space S1. Has been. The connecting wall 35 connects the side wall portions 32b of the adjacent bus bar holding portions 32, and is arranged in the vicinity of the outer end in the Y-axis direction (in the vicinity of the end opposite to the wire passing portion 34 side). The communication space S1 can function as an insulating layer that insulates the adjacent bus bars 21 in the X-axis direction.

  As shown in FIGS. 1 and 7, the bus bar holding part 32 has a bottom wall part 32 a that receives the bus bar 21 to be accommodated, and a side wall part 32 b that forms a rectangular tube shape that surrounds the bus bar 21. The bus bar 21 is accommodated from the side opposite to the unit cell 11 side along the Z-axis direction with respect to the bus bar holding portion 32. Similar to the bus bar 21, the side wall 32b has a horizontally long shape in which the long side direction coincides with the X-axis direction and the short side direction coincides with the Y-axis direction, and the wall surface is parallel to the Z-axis direction. Yes. The bottom wall portion 32a has a strip shape extending along the front-rear direction (Y-axis direction), and both extended end portions of the long side portions (portions extending along the X-axis direction) of the side wall portion 32b. It is connected to the central part. That is, the bottom wall portion 32 a partitions the horizontally long bus bar holding portion 32 at the center position, and a pair of spaces on both sides of the partition is opened along the Z-axis direction, and this is the positive electrode of the unit cell 11. Alternatively, it is an electrode insertion port 32c through which the negative electrode portions 12 and 13 are passed. Further, the side wall portion 32b holds a terminal holding recess 32d for fitting a corner portion of the voltage detection terminal 25 and a barrel portion of the voltage detection terminal 25 and is inclined with respect to the X-axis direction and the Y-axis direction. An extending barrel holding part 32e is formed. The voltage detection terminal 25 is held by the bus bar holding part 32 in a posture in which its axis is inclined with respect to the bus bar 21. Moreover, the barrel holding part 32e is connected to the side wall part 32b of the adjacent bus bar holding part 32, and is arranged to face the connection wall 35 and the communication space S1.

  As shown in FIG. 5, each connecting unit 31 constituting the protector 30 is provided with the bus bar holding portion 32 and the divided bus bar holding portion 32 </ b> S configured as described above. Specifically, each connection unit 31 is provided with one bus bar holding portion 32 at the center in the length direction (X-axis direction), whereas two divided bus bar holding portions 32S are provided at both ends in the length direction. Are provided. The divided bus bar holding portion 32S has a divided bottom wall portion 32aS arranged at an end portion opposite to the bus bar holding portion 32 side adjacent to the center side in the connecting unit 31, and an end portion on the divided bottom wall portion 32aS side opened. A space surrounded by the divided bottom wall portion 32aS and the divided side wall portion 32bS constitutes one electrode insertion port 32c. The divided bus bar holding portion 32S constitutes one bus bar holding portion 32 in cooperation with the divided bus bar holding portion 32S of the adjacent connecting units 31 when the plurality of connecting units 31 are assembled. That is, when the two divided bus bar holding portions 32S are arranged side by side adjacent to each other in the X-axis direction, the two divided bottom wall portions 32aS have one bottom wall portion 32a, and the two divided side wall portions 32bS have one side wall portion. 32b is configured. And the bus bar 21 accommodated ranging over two division | segmentation bus-bar holding | maintenance parts 32S will comprise the connection structure between the two connection units 31 which have these division | segmentation bus-bar holding | maintenance parts 32S. Note that the above-described terminal holding recess 32d and barrel holding portion 32e are provided on the divided side wall portion 32bS in the predetermined divided bus bar holding portion 32S (the right divided bus bar holding portion 32S shown in FIG. 5).

(Intermediate holding part 33)
As shown in FIG. 1, a plurality of intermediate holding portions 33 are provided side by side in the protector 30 along the arrangement direction (X-axis direction) of the cells 11 and form one row. The protector 30 is provided with one row of the intermediate holding portions 33 at the center position in the Y-axis direction. As shown in FIG. 5, four intermediate holding portions 33 are arranged side by side along the X-axis direction in each connection unit 31. The intermediate holding part 33 houses a terminal holding part 33a having a rectangular opening into which the main body part of the intermediate voltage detection terminal 26 can be fitted from above, and a voltage detection electric wire W2 that accommodates the crimping part and is crimped thereto. Is formed from an electric wire passage groove 33 b that can be led out into the electric wire passage portion 34. Among the intermediate holding portions 33 included in the connection unit 31, a pair of fitting convex portions 33 c are provided so as to protrude from the right end shown in FIG. 5 toward the right in the drawing along the X-axis direction. On the other hand, among the intermediate holding portions 33 of the connecting unit 31, a pair of fitting concave portions that can be fitted with the fitting convex portions 33c before and after sandwiching the terminal holding portion 33a at the left end shown in FIG. 33d is formed to open toward the left side of the figure. When the plurality of connecting units 31 are assembled, the fitting projections 33c are fitted into the fitting recesses 33d of the adjacent connecting units 31 so that positioning in the Y-axis direction is achieved. . Further, as shown in FIGS. 6, 7, and 9, the intermediate holding portion 33 protrudes toward the unit cell 11 along the assembly direction (Z-axis direction) of the battery wiring module 20 with respect to the unit cell 11. In addition, there is provided a positioning portion 33e that can position the voltage detecting electrode portion 14 in a direction (X-axis direction and Y-axis direction) intersecting the assembly direction.

(Wire passage part 34)
As shown in FIG. 1, the wire passage portion 34 has a groove shape extending along the arrangement direction (X-axis direction) of the cells 11 in the protector 30, and the electric wires W <b> 1, It is possible to route W2. In the protector 30, a pair of the wire passing portions 34 are arranged so as to be sandwiched between the rows of the intermediate holding portions 33 on the center side in the Y-axis direction and the rows of the bus bar holding portions 32 on both ends. Yes. As shown in FIGS. 5 and 7, the wire passage portion 34 receives the wires W1 and W2 and extends from the bottom wall portion 34a extending along the X-axis direction and both ends of the bottom wall portion 34a in the Y-axis direction. It consists of a pair of side wall portions 34b that rises and extends along the X-axis direction, and has a substantially channel-shaped cross section that is open toward the side opposite to the unit cell 11 side in the Z-axis direction as a whole. Of the pair of side wall portions 34b constituting the wire passage portion 34, a part of the side wall portion 34b closer to (outside) the bus bar holding portion 32 is a wire passage portion 34 in the bus bar holding portion 32 (divided bus bar holding portion 32S). The side wall part 32b (divided side wall part 32bS) closer is also used. In each of the side wall portions 34b of the wire passage portion 34, a barrel holding portion 32e of the bus bar holding portion 32 and a wire passage groove 33b of the intermediate holding portion 33 are formed in a continuous manner. Each electric wire W1, W2 passed through the through groove 33b is accommodated in the electric wire passage portion 34. In addition, from the leading ends of the side wall portions 34b constituting the wire passage portion 34, a wire holding projection 34c for partially holding the wires W1 and W2 in the X axis direction protrudes along the Y axis direction. Is formed. The electric wire holding protrusions 34c are intermittently arranged in the X-axis direction, and the arrangement interval thereof substantially coincides with the arrangement interval of the intermediate holding portion 33 (terminal holding portion 33a).

  As shown in FIGS. 7 and 8, the wire wiring module 20 according to the present embodiment has a first surface 36 that faces the unit cell 11, a unit that faces the unit cell 11, and a first surface 36. A distance (interval, gap) between the unit cell 11 and the surface 36 is relatively larger than the surface 36, and a second surface 37 holding the ventilation space S <b> 2 between the unit cell 11 is provided. Specifically, the wire passage portion 34 in the protector 30 is arranged at a position relatively closer to the unit cell 11 than the bus bar holding unit 32 in the assembly direction (Z-axis direction) of the wire wiring module 20 with respect to the unit cell 11. In other words, the bus bar holding part 32 is disposed at a position relatively farther from the unit cell 11 than the electric wire passing part 34. That is, the protector 30 is arranged such that the wire passage part 34 protrudes to a position that is one step lower than the bus bar holding part 32 (the bus bar holding part 32 is arranged to be retracted to a position one step higher than the wire passage part 34). It has an attached structure. Therefore, the outer surface (the surface facing the unit cell 11) in the bottom wall portion 34 a constituting the electric wire passing part 34 is a first surface 36 that is relatively disposed near the unit cell 11. Thus, an outer surface (a surface facing the unit cell 11) in the bottom wall portion 32 a constituting the bus bar holding unit 32 is a second surface 37 that is relatively far from the unit cell 11. In other words, the side wall part 34b of the electric wire passing part 34 is configured to protrude to the unit cell 11 side from the bottom wall part 32a of the bus bar holding part 32, whereby the bottom wall part 32a of the bus bar holding part 32 is formed. A bottom wall portion 34 a having the first surface 36 and continuing to the side wall portion 34 b of the electric wire passing portion 34 has a second surface 37.

  In addition, the electric wire passing part 34 has a height dimension (dimension in the Z-axis direction) that is relatively larger than that of the bus bar holding part 32, and the difference between the first surface 36 and the second surface 37. There is a gap in the positional relationship. The reason why the height of the electric wire passage part 34 is larger than that of the bus bar holding part 32 is that a large number of electric wires W1, W2 are accommodated inside the electric wire passage part 34. As the number of W2s, that is, the number of parallel cells 11 increases, the above-described difference in height dimension tends to increase.

  The ventilation space S2 held between the second surface 37 of the bus bar holding part 32 and the unit cell 11 straddles between the adjacent bus bar holding parts 32 in the X axis direction and extends the protector 30 in the X axis direction over the entire length. It penetrates along and communicates with the outside. By flowing air in the ventilation space S2, heat generated by energization of the bus bar 21 held by the bus bar holding portion 32 can be efficiently dissipated. A pair of ventilation spaces S <b> 2 are arranged in the vicinity of both end positions in the Y-axis direction of the protector 30 corresponding to the arrangement of the bus bar holding portions 32. Note that a communication space S1 held between the bus bar holding portions 32 adjacent to each other in the X-axis direction is communicated with the ventilation space S2, and air flows (goes back and forth) between the communication space S1 and the ventilation space S2. ).

  As shown in FIGS. 6 and 7, reinforcing ribs 38 are provided on the surfaces (including the first surface 36 and the second surface 37) of the connecting units 31 constituting the protector 30 facing the unit cells 11. It protrudes toward the battery 11 side. The reinforcing ribs 38 are formed in the entire range excluding both ends of the connecting unit 31 in the Y-axis direction, that is, in the range extending over the entire intermediate holding part 34 and both electric wire passing parts 33 and part of both bus bar holding parts 32. Yes. Therefore, the reinforcing ribs 38 are arranged in such a manner as to be continuous with the first surface 36 of the wire passing portion 33 and the second surface 37 of the bus bar holding portion 32. The reinforcing rib 38 has a wall shape having a thickness equivalent to each of the side wall portions 32b to 34b of the holding portions 32 and 33 and the wire passing portion 34. Reinforcing ribs 38 extend along the Y-axis direction, and portions arranged across the respective wire passing portions 34 and the adjacent bus bar holding portions 32 extend along the X-axis direction and the Y-axis direction, respectively. By being connected to the portion disposed in the intermediate holding part 34 while being present, the connection unit 31 in which stress concentration is a concern due to the above-described step structure can be reinforced.

  Of the portions of the reinforcing rib 38 that are arranged across the respective wire passing portions 34 and the adjacent bus bar holding portions 32, the portion that continues to the second surface 37 of the bus bar holding portion 32 is shown in FIG. 7. As shown, the protruding height is lower than the portion of the wire passing portion 34 that is continuous with the first surface 36, and the distance from the unit cell 11 is thereby relatively large. That is, the height of the ventilation space S <b> 2 held between the second surface 37 of the bus bar holding portion 32 and the unit cell 11 is locally narrowed by the reinforcing rib 38 protruding from the second surface 37. However, it can be said that by keeping the protruding height of the reinforcing rib 38 low as described above, the stenosis is kept to the minimum necessary and a sufficient height is secured. In addition, the protruding height of the reinforcing rib 38 gradually decreases in the direction of approaching the bus bar holding portion 32 (second surface 37) from the wire passage portion 34 (first surface 36) in the Y-axis direction. It is tapered (inclined) and has a tapered surface (inclined surface) 38a. Thereby, the distance between the second surface 37 of the bus bar holding part 32 and the unit cell 11, that is, the height dimension of the ventilation space S <b> 2 is continuously increased from the electric wire passing part 34 toward the bus bar holding part 32. It gradually becomes larger (wider). In addition, each reinforcing rib 38 connected to each bus bar holding portion 32 has only one tapered surface 38a and two reinforcing ribs 38a, and the arrangement in the Y-axis direction is different. It is said that. Further, the portion of the reinforcing rib 38 that continues to the intermediate holding portion 33 has substantially the same protruding height as the portion that continues to the wire passing portion 34. Although the outer surface of the bottom wall portion 33a of the intermediate holding portion 33 is relatively slightly larger than the second surface 37 of the bottom wall portion 32a of the bus bar holding portion 32, Since it is narrowed by the above-mentioned reinforcing rib 38, it does not become a space that penetrates the protector 30 along the X-axis direction like the ventilation space S2.

  Furthermore, as shown in FIGS. 6 and 7, each connecting unit 31 constituting the protector 30 protrudes toward the unit cell 11 along the Z-axis direction from the second surface 37 and also has a wire passing part 34. The rectifying plate 39 sandwiching the ventilation space S <b> 2 is integrally formed therebetween. The rectifying plate 39 is continuous with the long side portion on the outer end side of the side wall portion 32 b of the bus bar holding portion 32 and the connection wall 35, and is provided over the entire length of each connection unit 31. In a state in which each connecting unit 31 is assembled, each rectifying plate 39 is brought into contact with the X-axis direction almost seamlessly. Therefore, the rectifying plate 39 sandwiches the ventilation space S2 between the protector 30 and the wire passage portion 34 over the entire length in the length direction (X-axis direction). The rectifying plate 39 imparts a rectifying action to the air existing in the ventilation space S2 so as to flow along the X-axis direction, that is, the arrangement direction of the bus bar 21 and the cells 11. The rectifying plate 39 protrudes further to the unit cell 11 side than the first surface 36 of the electric wire passing part 34, and the protruding tip portion reaches a position close to the unit cell 11. This makes it difficult for the air in the ventilation space S2 to leak to the outside of the protector 30 in the Y-axis direction, so that a higher rectifying action is obtained.

  This embodiment has the structure as described above, and the operation thereof will be described subsequently. The battery wiring module 20 assembled by a predetermined procedure is assembled to the group of unit cells 11 arranged in parallel along the X-axis direction. 7, 9, and 11, the battery wiring module 20 is assembled while the first surface 36 and the second surface 37 of the battery wiring module 20 are opposed to the unit cell 11 group. Is pushed along the Z-axis direction so as to approach the unit cell group 11. In this process, the electrode portions 14 for voltage detection are guided by the positioning portions 33e provided in the intermediate holding portions 33, so that the X-axis direction and the Y-axis direction with respect to the electrode portions 12-14. Thus, the bus bar 21 (voltage detection terminal 25) and the intermediate voltage detection terminal 26 are positioned.

  When the battery wiring module 20 is pushed to a predetermined height position with respect to the group of unit cells 11, the positive or negative electrode portions 12 and 13 are connected to the bus bar holding portion 32 as shown in FIGS. 8, 10, and 12. The electrode is inserted into the electrode insertion port 32 c and is in contact with the bus bar 21, and the voltage detection electrode unit 14 is in contact with the intermediate voltage detection terminal 26. In this state, the screw holes of the positive or negative electrode portions 12 and 13 are communicated with the through hole 22 of the bus bar 21 and the insertion hole of the voltage detection terminal 25, and the screw hole of the voltage detection electrode portion 14 is an intermediate voltage. Since it is connected to the insertion hole of the detection terminal 26, a bolt is tightened in each screw hole. Thus, in addition to the positive and negative electrode portions 12 and 13 being electrically connected to the bus bar 21, the corresponding electrode portions 12 and 13 and the voltage detection terminal 25 are electrically connected through the bus bar 21, and Is electrically connected to the voltage detecting electrode portion 14 and the intermediate voltage detecting terminal 26. By assembling the battery wiring module 20 to the unit cell 11 group as described above, the assembly of the battery module 10 is completed.

  When the battery module 10 assembled as described above is energized, a large current is supplied to the bus bar 21 to supply power to various electrical components mounted on the vehicle, so that a detection signal is transmitted. Compared to the detection terminals 25 and 26 and the electric wires W1 and W2, the amount of generated heat is larger. If the heat generated from the bus bar 21 is confined between the battery wiring module 20 and the single battery 11 and reaches a high temperature state, the protector 30 made of, for example, a synthetic resin is deformed, or the battery performance of the single battery 11 is deteriorated. Problems may occur. In this regard, in this embodiment, as shown in FIGS. 8 and 12, the distance between the protector 30 constituting the battery wiring module 20 and the unit cell 11 is relatively larger than the first surface 36. And since it has the 2nd surface 37 which holds ventilation space S2 between unit cells 11, when heat which exists in this ventilation space S2 flows, the heat emitted from bus bar 21 is generated. Can be dissipated. Thereby, since heat dissipation of the bus bar 21 is enhanced, it becomes difficult for heat to be trapped between the battery wiring module 20 and the single battery 11, so that the protector 30 is deformed by heat or the battery performance of the single battery 11 is deteriorated. It is possible to prevent problems such as

  Moreover, the portion of the reinforcing rib 38 provided on the protector 30 that is connected to the second surface 37 is formed such that the distance from the unit cell 11 is relatively larger than the portion that is connected to the first surface 36. Therefore, while the protector 30 is reinforced by the reinforcing ribs 38, the narrowing of the ventilation space S2 by the reinforcing ribs 38 can be minimized and the area of the ventilation space S2 can be sufficiently secured. The air fluidity in S2 can be sufficiently secured. Furthermore, the air flow space S2 is sandwiched between the electric wire passing part 34 having the first surface 36, and a rectifying plate 39 extending along the arrangement direction (X-axis direction) of the unit cells 11 and the bus bars 21 is provided. Since it did in this way, the rectification | straightening effect | action can be acquired so that the air which exists in the ventilation space S2 of the form pinched | interposed between the baffle plate 39 and the electric wire passage part 34 may flow substantially straight along the X-axis direction. Thereby, the cell 11 and the bus bar 21 can be radiated more efficiently.

  As described above, the battery wiring module 20 of the present embodiment includes a plurality of bus bars that connect adjacent electrode portions 12 and 13 of a plurality of unit cells 11 having positive and negative electrode portions (electrode terminals) 12 and 13. (Connecting member) 21 and a plurality of bus bars 21, a protector 30 assembled in a shape facing the plurality of unit cells 11, and a first facing the unit cell 11. The surface 36 and the unit cell 11 are opposed to each other, the distance between the unit cell 11 is relatively larger than the first surface 36, and the ventilation space S2 is held between the unit cell 11 and the surface 36. A second surface 37.

  In this way, a large amount of current flows through the plurality of bus bars 21 connecting the adjacent electrode portions 12 and 13 of the plurality of single cells 11 with energization, so that the amount of heat generated is also large. Even in that case, the ventilation space S2 is retained between the second surface 37 and the unit cell 11 having a relatively large distance between the unit cell 11 and the first surface 36. The heat from the bus bar 21 can be dissipated by the ventilation space S2. Thus, heat dissipation of the bus bar 21 is improved, so that heat can be prevented from being accumulated between the battery cells 11. For example, the protector 30 is deformed by heat, or the battery performance of the battery cells 11 is adversely affected. It can prevent such a situation.

  Moreover, the voltage detection terminal (detection terminal) 25 overlapped with the bus bar 21 and connected to the terminal portion of the electric wire W <b> 1 is provided, and the protector 30 is connected to the bus bar holding portion 32 that holds the bus bar 21 and the voltage detection terminal 25. And the first surface 36 is formed in the wire passage portion 34, whereas the second surface 37 is in the bus bar holding portion 32. Is formed. In this way, since the detection signal is transmitted to the electric wire W1 connected to the voltage detection terminal 25, the current value of the flowing current is very small compared to the bus bar 21. Therefore, since the calorific value from the said electric wire W1 is also small, it is preferable to form the 1st surface 36 in the electric wire passage part 34 through which the electric wire W1 is passed among the protectors 30. On the other hand, the bus bar holding portion 32 that holds the bus bar 21 in the protector 30 is formed with the second surface 37 that holds the ventilation space S2 with the unit cell 11, thereby generating a large size generated from the bus bar 21. The amount of heat generated can be efficiently dissipated.

  In addition, the reinforcement is continuous with the first surface 36 of the wire passing portion 34 and the second surface 37 of the bus bar holding portion 32 and protrudes from the first surface 36 and the second surface 37 toward the unit cell 11 side. A rib (reinforcing part) 38 is provided, and the reinforcing rib 38 is such that the portion connected to the second surface 37 is relatively closer to the unit cell 11 than the portion connected to the first surface 36. It is formed to be large. In this way, it is possible to reinforce the protector 30 including the wire passing part 34 having the first surface 36 and the bus bar holding part 32 having the second surface 37 by the reinforcing rib 38. Although the reinforcing rib 38 protrudes from the first surface 36 and the second surface 37 toward the unit cell 11, the portion connected to the second surface 37 is more than the portion connected to the first surface 36. Since the distance between the two is relatively large, it is suitable for securing the ventilation space S2, and sufficient heat dissipation performance can be obtained.

  Further, the reinforcing rib 38 is formed in a tapered shape so that the distance from the unit cell 11 increases from the electric wire passing part 34 toward the bus bar holding part 32. In this way, since the ventilation space S2 becomes wider as it approaches the bus bar holding portion 32, the heat dissipation performance can be further improved.

  Further, a rectifying plate 39 that protrudes at least from the second surface 37 to the unit cell 11 side and sandwiches the ventilation space S2 with the electric wire passing part 34 is provided. If it does in this way, the rectification | straightening effect | action can be provided to the air which flows in the ventilation space S2 with the rectification | straightening board 39 which pinches | interposes ventilation space S2 between the electric wire penetration parts 34. FIG. Thereby, higher heat dissipation performance can be obtained.

  The rectifying plate 39 is configured to extend along the direction in which the plurality of bus bars 21 are arranged. In this way, the air present in the ventilation space S2 flows along the arrangement direction of the plurality of bus bars 21 by the rectifying plate 39, so that the plurality of bus bars 21 can radiate heat more efficiently. Can do.

  In addition, the rectifying plate 39 is configured to protrude from the first surface 36 toward the unit cell 11. In this way, since the rectifying action imparted to the air existing in the ventilation space S2 by the rectifying plate 39 is higher, the heat dissipation performance can be further improved.

  The rectifying plate 39 is integrally formed with the protector 30. In this case, as compared with the case where the rectifying plate 39 is a separate component from the protector 30, no positional deviation occurs in the positional relationship of the rectifying plate 39 with respect to the second surface 37, so that stable rectifying performance is achieved. Can be obtained.

<Embodiment 2>
A second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, a ventilation opening 40 is provided in the side wall 132b of the bus bar holding portion 132. In addition, the overlapping description about the same structure, an effect | action, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

  As shown in FIGS. 13 to 15, the side wall 132 b of the bus bar holding portion 132 according to the present embodiment is provided with a ventilation opening 40 that opens into the communication space S <b> 1 interposed between the adjacent bus bar holding portions 132. Yes. The ventilation opening 40 is provided in a short side portion extending along the Y-axis direction in the side wall portion 132b having a horizontally long rectangular tube shape. The ventilation opening 40 allows the space in the bus bar holding portion 132 and the communication space S1 to communicate with each other by penetrating the short side portion of the side wall portion 132b. Since the communication space S1 communicates with the ventilation space S2, the air present in the ventilation space S2 can flow to the space in the bus bar holding portion 132 through the ventilation opening 40 and the communication space S1. It is said that. Since the heat generated from the bus bar 121 is easily trapped in the space in the bus bar holding part 132, the heat described above is utilized by using the air flowing into the ventilation space S1 through the ventilation opening 40 and the communication space S2. It can be efficiently dissipated.

  Further, the ventilation opening 40 is opened to the side opposite to the unit cell 11 side, thereby facilitating the die removal when the connecting unit 131 is resin-molded. Further, the ventilation openings 40 provided in the short side portions of the side wall portions 132b facing each other across the communication space S1 are arranged so as to be offset from each other in the Y-axis direction. Specifically, the ventilation opening 40 provided in the short side portion where the terminal holding recess 132d and the barrel holding portion 132e are provided among the pair of short side portions in the side wall portion 132b is relatively outside in the Y-axis direction. It is arranged eccentrically on the side (opposite side to the wire passing part 134 side). On the other hand, the ventilation opening 40 provided in the short side part of the side wall part 132b opposed to the short side part provided with the terminal holding recessed part 132d and the barrel holding part 132e across the ventilation space S1 is formed in the Y-axis direction. Is arranged eccentrically toward the inner side (on the wire passing part 134 side). That is, it can be said that the pair of ventilation openings 40 opening in the same ventilation space S1 are displaced from the inner position to the outer position in the Y-axis direction.

  As described above, according to the present embodiment, the protector 130 holds the bus bar 21, and has a plurality of bus bar holding portions 132 having the side wall portion 132 b that rises toward the side opposite to the unit cell 11 side. The side wall 132b is provided with a ventilation opening 40 that opens to the communication space S1. The communication space S1 communicates with the ventilation space S2. In this way, heat from the bus bar 21 is efficiently dissipated into the ventilation space S2 through the ventilation opening 40 and the communication space S1 provided in the side wall 132b, so that the heat dissipation performance can be further improved.

<Embodiment 3>
Embodiment 3 of the present invention will be described with reference to FIG. In the third embodiment, a lid 41 is added as a component of the battery wiring module 220, and a rectifying plate 239 is provided on the lid 41. In addition, the overlapping description about the same structure, an effect | action, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

  As shown in FIG. 16, the battery wiring module 220 according to the present embodiment includes a lid 41 that is attached to the protector 230 from the side opposite to the unit cell 11 side. The lid body 41 has a size that covers the protector 230 from almost the entire area from the side opposite to the unit cell 11 side, and both outer edges on the long side of the lid body body 41 along the Z-axis direction. And a lock piece 41b protruding toward the unit cell 11 side. The lid body 41a can collectively cover members such as the bus bar 21, the voltage detection terminal 25, the intermediate voltage detection terminal 26, and the electric wires W1 and W2 housed in the protector 230. The lock piece 41 b is locked to the lock protrusion 42 provided on the outer surface of the protector 230, so that the lid body 41 can be held in the attached state with respect to the protector 230. The lid 41 is integrally formed with a rectifying plate 239 that protrudes from the second surface 37 of the protector 230 to the unit cell 11 side and sandwiches the ventilation space S2 with the wire passage portion 234. . The rectifying plate 239 has a plate shape that protrudes toward the unit cell 11 along the Z-axis direction from both outer edges on the long side of the lid body 41a, and the long sides of the lid body 41a and the protector 230 It is set as the form extended over the full length about a direction. The rectifying plate 239 is configured to protrude further toward the unit cell 11 than the first surface 36 of the protector 230. In addition, since the effect | action and effect by the baffle plate 239 are the same as that of Embodiment 1 mentioned above, the overlapping description is omitted.

  As described above, according to the present embodiment, the protector 230 is attached to the protector 230 from the side opposite to the unit cell 11 side, so that the bus bar 21, the voltage detection terminal 25, the intermediate voltage detection terminal 26, and the electric wires W1, W2 are connected. A cover body 41 is provided, and the rectifying plate 39 is formed integrally with the cover body 41. If it does in this way, since the thing of the existing structure can be diverted as the protector 30, it becomes suitable for aiming at cost reduction.

<Embodiment 4>
A fourth embodiment of the present invention will be described with reference to FIG. 17 or FIG. In the fourth embodiment, a battery module temperature adjustment system BMAS using an air conditioner mounted on a vehicle will be described. In addition, the overlapping description about the same structure, an effect | action, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

  The battery module temperature adjustment system BMAS according to the present embodiment is for adjusting the temperature of a battery module 310 including a plurality of single cells 311 and a battery wiring module 320 as shown in FIGS. 17 and 18. It consists of the module 310 and the air blower 43 which can blow air toward the ventilation space S2 of the battery wiring module 320. This blower device 43 uses a blower system of an air conditioner (not shown) mounted on the vehicle, and specifically, an air conditioner that guides cold air or warm air generated in the air conditioner to an air outlet in the vehicle. A blower duct 43a branched from the duct (blower system) is provided. The air duct 43a is provided in a form in which the pair is arranged in the Y-axis direction so as to be opposed to the pair of ventilation spaces S2 in the battery wiring module 320, and the air outlets open toward the ventilation space S2. . The protector 330 constituting the battery wiring module 320 is provided with a ventilation inlet 44 that communicates with the ventilation space S2 and receives air blown from the outlet of the blower duct 43a. The air introduction port 44 is formed in a portion of the protector 330 that is continuous with the second surface 37 of the reinforcing rib 338 that is closest to the air duct 43a.

  According to the above configuration, for example, when the air conditioner is in a cooling operation in a high temperature environment where the room temperature or the outside temperature of the vehicle is high, the cool air generated in the air conditioner is transferred from the air conditioner duct to the air outlet in the vehicle. Although the air is blown, the cold air is also blown to the blower duct 43a of the blower device 43 branched from the air conditioner duct. The cold air blown out from the blowout port of the blower duct 43a is blown through the blower introduction port 44 to the ventilation space S2 held between the second surface 37 of the battery wiring module 320 and the unit cell 311. Thereby, the heat_generation | fever from the bus-bar 321 and the cell 311 can be suppressed more efficiently using the cold air | gas produced | generated with the air conditioner. On the other hand, when the air conditioner is heated in a low temperature environment where the room temperature or outside temperature of the vehicle is low, the warm air generated in the air conditioner is blown from the air conditioner duct to the air outlet in the car. Warm air is also blown to the blower duct 43a of the blower device 43 branched from the duct. The warm air blown from the blower outlet of the blower duct 43a is blown to the ventilation space S2 held between the second surface 37 of the battery wiring module 320 and the unit cell 311 through the blower inlet 44. Thereby, for example, at the initial stage when the engine is started, the unit cell 311 can be activated using the warm air generated by the air conditioner even in a low temperature environment.

  As described above, according to the battery wiring module 320 according to the present embodiment, the protector 330 communicates with the ventilation space S2 so that the ventilation from the blowing device 43 can be introduced into the ventilation space S2. Is formed. If it does in this way, the temperature which concerns on ventilation space S2 can be adjusted appropriately by ventilating from ventilation apparatus to ventilation space S2 through a ventilation introduction port.

  Furthermore, according to the battery module temperature adjustment system BMAS according to the present embodiment, the battery wiring module 320 described above, the plurality of single cells 311, and the blower device 43 capable of blowing air to the ventilation space S <b> 2 are provided. If it does in this way, the temperature which concerns on the cell 311 and the battery wiring module 320 can be adjusted appropriately by ventilating to ventilation space S2 by the air blower 43. FIG.

  Further, the blower 43 can blow at least cool air. If it does in this way, high heat dissipation performance will be obtained by blowing cold air to ventilation space S2 by blower 43.

  Moreover, the air blower 43 can selectively blow cool air and warm air. In this way, in order to suppress the heat generation of the bus bar 321, heat is radiated by blowing cool air from the blower device 43 to the ventilation space S <b> 2, and the unit cell 311 is inactivated in a low temperature environment. In other words, the cell 311 can be activated by blowing warm air from the blowing device 43 to the ventilation space S2.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In each of the above-described embodiments, the battery wiring module has a configuration in which the bus bar is arranged with the bottom wall portion of the bus bar holding portion in the protector interposed between the single cell and the single cell. An arrangement in which the bus bar is interposed between the bottom wall portion of the bus bar holding portion (an arrangement in which the bus bar is disposed on the unit cell side surface of the bottom wall portion of the bus bar holding portion) is also possible. In that case, the surface of the bus bar facing the unit cell constitutes the “second surface” of the battery wiring module.

  (2) In each of the embodiments described above, in the battery wiring module, the electric wires are arranged with the bottom wall portion of the wire passage portion of the protector interposed between the single cells. An arrangement in which the electric wire is interposed between the bottom wall portion of the electric wire passage portion (an arrangement in which the electric wire is arranged on the unit cell side surface in the bottom wall portion of the electric wire passage portion) is also possible. In that case, the surface of the electric wire facing the unit cell constitutes the “first surface” of the battery wiring module.

  (3) In each of the embodiments described above, in the battery wiring module, the intermediate voltage detection terminal is configured to be arranged with the bottom wall portion of the intermediate holding portion in the protector interposed between the single cell and the battery. An arrangement in which the intermediate voltage detection terminal is interposed between the unit cell and the bottom wall part of the intermediate holding part (an arrangement in which the intermediate voltage detection terminal is arranged on the surface on the unit cell side in the bottom wall part of the intermediate holding part) Is also possible.

  (4) In each of the above-described embodiments, the protector has a structure in which the ventilation space is held between the bus bar holding part and the single cell. For example, the protector is connected to the intermediate holding part as a reinforcing rib shape. If the portion can be set to the same height as the portion connected to the bus bar holding portion, the surface of the intermediate holding portion facing the unit cell becomes the second surface and the intermediate holding portion has A continuous ventilation space along the X-axis direction can be secured between the second surface and the unit cell.

  (5) In each of the above-described embodiments, the bus bar holding portion of the protector has a structure having a bottom wall portion. For example, an insertion groove for laterally inserting the bus bar is formed on the side wall portion of the bus bar holding portion. It is also possible to omit the bottom wall portion from the bus bar holding portion if it is left. This configuration can be similarly applied to the detection terminal holding unit.

  (6) In each of the above-described embodiments, the reinforcing rib is formed in a tapered shape so that the distance from the cell increases in the direction approaching the bus bar holding portion from the wire passage portion. By forming the reinforcing ribs in a step shape, the distance from the unit cell may be sequentially changed step by step.

  (7) In addition to the above (6), only two types of protrusion heights from each surface are provided in the portion where the reinforcing rib is continuous with the first surface and the portion where the reinforcing surface is continuous with the second surface. It is also possible.

  (8) In each of the above-described embodiments, the rectifying plate is integrally formed with the protector or the lid. However, the rectifying plate is assembled to one of these as a separate body from the protector and the lid. What was made is also included in this invention.

  (9) In the above-described embodiments, the rectifying plate is integrally formed only on either the protector or the lid, but the rectifying plate may be provided on both the protector and the lid. .

  (10) In each of the above-described embodiments, the rectifying plate has been configured to extend continuously over the entire length of the protector. However, the rectifying plate is configured to be partially provided in the length direction of the protector. Are also included in the present invention. In that case, a plurality of rectifying plates may be intermittently arranged in parallel in the length direction of the protector.

  (11) In each of the above-described embodiments, the rectifying plate protruded toward the unit cell from the first surface. However, the protruding tip of the rectifying plate is flush with the first surface. It is also possible to adopt a configuration, or a configuration in which the protruding tip of the rectifying plate does not reach the first surface (a configuration in which it is retracted and arranged on the opposite side of the unit cell from the first surface).

  (12) The specific arrangement, the number of installations, the shape, and the like of the ventilation openings described in the second embodiment can be changed as appropriate.

  (13) As a modification of the above-described fourth embodiment, the protector may be provided with a duct holding portion that holds the air duct. If it does in this way, the air ventilated from a ventilation duct can be more reliably introduced into ventilation space.

  (14) As a modification of the above-described fourth embodiment, for exhausting the air that has passed through the ventilation space to a position facing the end opposite to the installation side end of the air duct in the battery wiring module. It is also possible to install an exhaust duct. If it does in this way, the fluidity | liquidity of the air in ventilation space can be improved further.

  (15) As a modification of the above-described fourth embodiment, a temperature sensor may be installed in the ventilation space, and the temperature of the air blown from the blower duct may be adjusted according to the detected temperature. If it does in this way, the temperature in ventilation space can be made more appropriate.

  (16) In the fourth embodiment described above, the blower duct of the blower device is illustrated as being branched from the air conditioner duct, but a blower duct independent of the air conditioner duct may be provided.

  (17) In the fourth embodiment described above, the blower uses an air conditioner blower system as an example. However, for example, in a vehicle, an outside air introduction duct for introducing outside air into the room or air in the seven is circulated. Since the inside air circulation duct is provided, the blower duct of the blower may be provided in a form branched from the outside air introduction duct or the inside air circulation duct.

  (18) In the battery module and the battery wiring module described in each of the above embodiments, as an installation posture in the vehicle, any one of the X-axis direction, the Y-axis direction, and the Z-axis direction shown in each drawing is vertical or horizontal. The posture can be matched with the direction. In addition, it is possible to install the battery module and the battery wiring module in the vehicle in a posture in which any one of the X-axis direction, the Y-axis direction, and the Z-axis direction shown in each drawing is inclined with respect to the vertical direction or the horizontal direction. .

  (19) In the above-described embodiment, the case where a plurality of single cells are connected in series has been described. However, the present invention is not limited to this, and may be applied to a case where a plurality of single cells are connected in parallel.

  (20) In the above-described embodiment, the number of single cells constituting the battery module is not limited to the number in the above-described embodiment. Further, the shape of the battery wiring module can be arbitrarily set according to the number of single cells.

  (21) In the above-described embodiment, the bus bar is exemplified as the connecting member. However, the bus bar is not limited thereto, and any member that can be electrically connected may be used. For example, an electric wire, a flexible printed circuit board (FPC), or the like may be used. Good.

  DESCRIPTION OF SYMBOLS 11,311 ... Single cell, 12, 13 ... Electrode part (electrode terminal), 20, 220, 320 ... Battery wiring module, 21,321 ... Bus bar (connection member), 25 ... Voltage detection terminal (detection terminal), 26 ... Intermediate voltage detection terminal (detection terminal), 30, 130, 230, 330 ... protector, 32, 132 ... busbar holding part (connection member holding part), 34, 134, 234 ... electric wire passing part, 36 ... first surface, 37 ... Second surface, 38,338 ... Reinforcing rib (reinforcing part), 39,239 ... Rectifying plate, 40 ... Ventilation opening, 41 ... Cover body, 43 ... Blower device, 44 ... Blower inlet, 132b ... Side wall Part, BMAS ... battery module temperature control system, S1 ... communication space, S2 ... ventilation space, W1, W2 ... electric wire

Claims (13)

  1. A plurality of connecting members for connecting adjacent electrode terminals of a plurality of single cells having positive and negative electrode terminals;
    A protector that holds a plurality of the connection members, and is assembled in a form that is opposed to the plurality of unit cells;
    A first surface facing the unit cell;
    A second surface facing the unit cell and having a relatively larger distance from the unit cell than the first surface and having a ventilation space with the unit cell; equipped with a,
    A detection terminal that is overlapped with the connection member and connected to a terminal portion of an electric wire is provided, and a connection member holding portion that holds the connection member and the electric wire connected to the detection terminal are passed through the protector. There is a wire passage part,
    In the battery wiring module , the first surface is formed in the wire passage portion, whereas the second surface is formed in the connection member holding portion .
  2. A reinforcing portion that is continuous with the first surface of the wire passage portion and the second surface of the connection member holding portion and protrudes toward the unit cell from the first surface and the second surface. Is provided,
    The reinforcing portion is a portion connected to the second surface than said portion connecting to the first surface, said distance is according to claim 1, wherein are formed to be relatively large between the unit cells Battery wiring module.
  3. 3. The battery wiring module according to claim 2 , wherein the reinforcing portion is formed in a tapered shape so that a distance from the cell is increased in a direction approaching the connection member holding portion from the wire passage portion.
  4. According to any one of claims 1 to 3, wherein the rectifying plates sandwiching the ventilation space is provided between the wire insertion portion with projecting at least said single cell side of the second surface Battery wiring module.
  5. The battery wiring module according to claim 4 , wherein the rectifying plate is configured to extend along an arrangement direction of the plurality of connection members.
  6. The rectifying plate, the first claim 4 or battery wiring module according to claim 5, wherein is in the form of projecting the single cell side than the surface.
  7. The rectifying plate, battery wiring module according to any one of claims 6 claims 4 are integrally formed on the protector.
  8. The protector is provided with a lid that covers the connection member, the detection terminal, and the electric wire by being attached from the side opposite to the unit cell side,
    The rectifying plate, battery wiring module according to any one of claims 6 claims 4 are integrally formed on the lid.
  9. The protector holds the connection member, and includes a plurality of connection member holding portions each having a side wall portion that rises toward the side opposite to the unit cell side, and a communication space communicating with the ventilation space. It is arranged side by side in the form of possession,
    The battery wiring module according to any one of claims 1 to 8 , wherein the side wall is provided with a ventilation opening that opens into the communication space.
  10. Said protector, said that communicates with the ventilation space, according to any one of claims 9 to blow from the blower claims 1 to introducible blower inlet in the ventilation space is formed Battery wiring module.
  11. Claims 1 and battery wiring module according to any one of claims 1 0,
    Multiple cells,
    A battery module temperature adjustment system comprising a blower capable of blowing air into the ventilation space.
  12. The blower, battery module temperature control system of claim 1 1, wherein the possible blowing at least cold.
  13. The blower according to claim 1 1 or claim 1 second battery module temperature control system according are selectively blown allows the cool air and warm air.
JP2011193931A 2011-09-06 2011-09-06 Battery wiring module and battery module temperature control system Active JP5776935B2 (en)

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