JP2019032959A - Battery pack - Google Patents

Abstract

To provide a battery pack which can maintain connection reliability between a detection terminal and an electric wire.SOLUTION: A battery pack 1 includes: a housing member 3 which houses multiple batteries; and a detection terminal 13 disposed at the housing member 3. In the detection terminal 13, a plate-like terminal part 11 provided with a terminal insertion hole 7, into which a pole 5 of the battery is inserted, and fixed through a fixing member 9 fastened to the pole 5 and an electric wire connection part 15 integrally provided with the terminal part 11 and connected to a terminal part of an electric wire are provided. A stress absorption part 17, which is integrally formed with the terminal part 11 and the electric wire connection part 15, is provided between the terminal part 11 of the detection terminal 13 and the electric wire connection part 15. A pair of contact parts 19, 19 in which the stress absorption part 17 is disposed and which is positioned so as to be brought into contact with both sides of the stress absorption part 17 as viewed in a rotation direction of the fixing member 9 is provided at the housing member 3.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a battery pack.

  Conventionally, as a battery pack, a connection unit as a housing member that accommodates a plurality of batteries, a detection terminal arranged in the connection unit, and a terminal insertion hole that is provided in the detection terminal and is inserted into the pole column of the battery are provided. A plate-like terminal portion fixed via a nut as a fixing member fastened to the pole pole, and a wire connecting portion provided on the detection terminal and provided integrally with the terminal portion and connected to the terminal portion of the electric wire. What was provided is known (for example, refer patent document 1).

  In this battery pack, a bus bar that is inserted into the battery pole column and connects multiple batteries is arranged in the connection unit, the battery pole column is inserted into the terminal insertion hole of the terminal portion, and a nut is fastened to the battery pole column By doing so, the detection terminal is fixed to the housing member together with the bus bar.

  In such a battery pack, there is a fixing means for fixing the detection terminal to the bus bar between the bus bar and the detection terminal in order to prevent displacement of the arrangement position of the detection terminal with respect to the housing member when the nut is fastened. Is provided.

JP 2012-248513 A

  By the way, in the battery pack as in Patent Document 1, the fixing terminal can position the detection terminal on the housing member with respect to a certain fastening force of the fixing member, but the fastening force of the fixing member increases excessively. In such a case, the fixing means may be deformed and the detection terminal may be displaced with respect to the casing member.

  When such a displacement of the detection terminal with respect to the housing member occurs, the wire connection portion of the detection terminal interferes with the surrounding housing member and the wire connection portion is deformed, so that the connection reliability between the detection terminal and the wire is reliable. There was a risk that the performance would decline.

  Then, this invention aims at provision of the battery pack which can maintain the connection reliability of a detection terminal and an electric wire.

  According to the first aspect of the present invention, there is provided a housing member that accommodates a plurality of batteries, a detection terminal that is disposed in the housing member, and a terminal insertion hole that is provided in the detection terminal and is inserted into the pole column of the battery. A flat terminal portion fixed via a fixing member provided and fastened to the pole column; and a wire connecting portion provided on the detection terminal and provided integrally with the terminal portion and connected to a terminal portion of the electric wire. A stress absorbing portion provided integrally with the terminal portion and the electric wire connecting portion between the terminal portion and the electric wire connecting portion provided in the detection terminal; and the stress absorbing portion provided in the casing member. A battery pack comprising: a pair of abutting portions disposed so as to be able to abut on both sides of the stress absorbing portion in the rotation direction of the fixing member.

  In this battery pack, the housing member is provided with a pair of abutment portions positioned so as to be able to abut on both sides in the rotational direction of the fixing member of the stress absorbing portion, so that when the fixing member is fastened to the polar pole of the battery Further, the stress absorbing portion is brought into contact with either one of the pair of contact portions by the fastening force of the fixing member.

  Since the stress absorbing portion that is in contact with the pair of contacting portions is provided between the terminal portion and the wire connecting portion, the fastening force by the fixing member is caused by the contact between the stress absorbing portion and the contacting portion. The terminal portion is not transmitted to the wire connection portion.

  For this reason, even if an excessive fastening force of the fixing member is applied so that the arrangement position of the detection terminal with respect to the housing member is changed, the stress absorbing portion only deforms due to the contact between the stress absorbing portion and the contacting portion. Yes, the arrangement position of the electric wire connecting portion does not fluctuate, and deformation of the electric wire connecting portion can be prevented.

  Therefore, in such a battery pack, it is possible to prevent deformation of the electric wire connecting portion due to fastening of the fixing member by the stress absorbing portion, and it is possible to maintain connection reliability between the detection terminal and the electric wire.

  A second aspect of the present invention is the battery pack according to the first aspect, wherein the stress absorbing portion is provided with a pair of wall portions that can come into contact with the pair of contact portions. And

  In this battery pack, since the pair of wall portions that can come into contact with the pair of contact portions are erected on the stress absorption portion, the contact area between the stress absorption portion and the contact portion can be increased. The contact between the stress absorbing part and the contact part in fastening of the fixing member can be stabilized.

  According to a third aspect of the present invention, in the battery pack according to the first or second aspect, the casing member is provided with a bus bar that is inserted into the pole column of the battery and connects the plurality of the batteries, and the housing. At least one of the body member and the bus bar is provided with a convex portion, and the detection terminal is provided with a concave portion that can be fitted to the convex portion.

  In this battery pack, at least one of the housing member and the bus bar is provided with a convex portion, and the detection terminal is provided with a concave portion that can be fitted to the convex portion. Thus, the fastening force of the fixing member can be received by the fitting, and the fastening force of the fixing member can be further prevented from being transmitted to the electric wire connecting portion.

  According to a fourth aspect of the present invention, in the battery pack according to the third aspect, the concave portion is provided with a cross-shaped through groove, and the dimension of the intersecting portion of the through groove is smaller than the dimension of the convex portion. It is characterized by being set.

  In this battery pack, a cross-shaped through groove is provided in the concave portion, and the dimension of the intersecting portion of the through groove is set to be smaller than the dimension of the convex portion, so the convex portion is press-fitted into the intersecting portion of the through groove, The fastening force of the fixing member can be more stably received by the fitting between the convex portion and the concave portion.

  A fifth aspect of the present invention is the battery pack according to the third or fourth aspect, wherein a plurality of the convex portions and the concave portions are provided.

  In this battery pack, since a plurality of convex portions and concave portions are provided, there are a plurality of fitting portions between the convex portions and the concave portions, and the fastening force of the fixing member can be more stably received. The influence on the electric wire connection part by fastening force can be suppressed significantly.

  A sixth aspect of the present invention is the battery pack according to any one of the first to fifth aspects, wherein the pair of contact portions are positioned in a direction in which the detection terminals are detached from the housing member. A detachment prevention unit is provided.

  In this battery pack, the pair of abutment portions are provided with a separation prevention portion positioned in the direction of separation of the detection terminal from the housing member. It is possible to prevent the wire connecting portion from being deformed due to the contact between the portion and the detachment preventing portion, thereby preventing the detection terminal from being detached from the casing member.

  According to the present invention, it is possible to provide a battery pack that can maintain the connection reliability between the detection terminal and the electric wire.

1 is a perspective view of a battery pack according to a first embodiment of the present invention. It is a top view of the battery pack according to the first embodiment of the present invention. It is XX sectional drawing of FIG. It is a top view of the bus bar of the battery pack according to the first embodiment of the present invention. It is a top view of the detection terminal of the battery pack which concerns on 1st Embodiment of this invention. It is a top view of the battery pack which concerns on 2nd Embodiment of this invention. (A) is a top view of the bus bar of the battery pack according to the second embodiment of the present invention. FIG. 7B is a side view of FIG. It is a top view of the detection terminal of the battery pack which concerns on 2nd Embodiment of this invention. It is a top view of the battery pack which concerns on 3rd Embodiment of this invention. It is a top view of the bus bar of the battery pack which concerns on 3rd Embodiment of this invention. It is a top view of the detection terminal of the battery pack which concerns on 3rd Embodiment of this invention.

  A battery pack according to an embodiment of the present invention will be described with reference to FIGS.

(First embodiment)
The first embodiment will be described with reference to FIGS.

  The battery pack 1 according to the present embodiment includes a housing member 3 that houses a plurality of batteries, and a detection terminal 13 that is disposed on the housing member 3.

  Further, the detection terminal 13 is provided with a terminal insertion hole 7 that is inserted into the battery pole column 5, and is fixed via a fixing member 9 that is fastened to the pole column 5, and a terminal unit 11 and an electric wire connecting portion 15 provided integrally with the electric wire and connected to the end portion of the electric wire.

  And between the terminal part 11 of the detection terminal 13 and the electric wire connection part 15, the stress absorption part 17 is provided integrally with the terminal part 11 and the electric wire connection part 15, and the stress absorption part 17 is provided in the housing member 3. Is provided, and a pair of contact portions 19, 19 are provided so as to be able to contact the both sides in the rotational direction of the fixing member 9 of the stress absorbing portion 17.

  The stress absorbing portion 17 is provided with a pair of wall portions 21 and 21 that can come into contact with the pair of contact portions 19 and 19.

  Further, the pair of contact portions 19, 19 is provided with a detachment preventing portion 23 positioned in the direction in which the detection terminal 13 is detached from the housing member 3.

  As shown in FIGS. 1 to 5, a battery (not shown) is a rechargeable secondary battery, and an electrode element (not shown) is accommodated in a body formed in a rectangular parallelepiped shape. Electrically connected positive and negative pole columns 5 and 5 are arranged on the same surface of the main body.

  This battery is accommodated in the housing member 3 in a state where the positive and negative pole columns 5 and 5 of adjacent batteries are arranged alternately so that they are different.

  The casing member 3 is made of an insulating material such as synthetic resin, is formed in a casing shape, and houses a plurality of batteries therein.

  In the casing member 3, a bus bar 25 is disposed on the battery pole 5 side, and a plurality of batteries are electrically connected via the bus bar 25.

  The bus bar 25 is made of a conductive material, is formed in a flat plate shape, and is provided with a bus bar insertion hole 27.

  The bus bar insertion hole 27 is provided so as to penetrate the bus bar 25 in the plate thickness direction, and is formed in a circular shape so that the electrode pole 5 of the battery can be inserted.

  The bus bar insertion hole 27 allows the battery pole column 5 to be inserted when the bus bar 25 is arranged on the battery pole column 5 side of the housing member 3, electrically connects the bus bar 25 and the battery, and the housing. A plurality of batteries housed in the body member 3 are electrically connected.

  The plurality of batteries electrically connected via the bus bar 25 are electrically connected to the detection terminal 13 via a fixing member 9 formed of a nut fastened to the battery pole 5.

  The detection terminal 13 is made of a conductive material, and includes a terminal portion 11, a wire connecting portion 15, and a stress absorbing portion 17.

  The terminal portion 11 is formed in a flat plate shape, and a circular terminal insertion hole 7 is formed through the terminal portion 11 in the thickness direction so that the battery pole 5 can be inserted.

  In the terminal portion 11, the detection terminal 13 is arranged on the surface of the bus bar 25 in a state where the battery pole column 5 is inserted into the bus bar insertion hole 27 of the bus bar 25, and the battery pole column 5 is inserted into the terminal insertion hole 7. By doing so, the bus bar 25, the detection terminal 13, and the battery are electrically connected.

  The electric wire connection part 15 is formed by one member continuous with the terminal part 11 and has a pair of crimping pieces and a pair of crimping pieces.

  The electric wire connecting portion 15 includes a pair of crimping pieces at a core portion of an electric wire and a pair of crimping pieces at a terminal portion of an electric wire (not shown) connected to a detector (not shown) that detects a battery voltage. It is crimped | bonded to the coating | coated part of an electric wire, and the detection terminal 13 and an electric wire are electrically connected.

  The stress absorbing portion 17 is formed of a single member that is continuous with the terminal portion 11 and the wire connecting portion 15 between the terminal portion 11 and the wire connecting portion 15.

  The stress absorbing portion 17 has a pair of wall portions 21 and 21 that are erected by bending both sides in the width direction in a direction perpendicular to the plane.

  Such a detection terminal 13 has a fixing member 9 made of a nut in the battery pole column 5 in a state where the bus bar insertion hole 27 of the bus bar 25 and the terminal insertion hole 7 of the terminal portion 11 are inserted into the battery pole column 5. As a result, the detection terminal 13 is fixed to the battery pole 5 and the voltage of the battery pack 1 can be detected stably.

  By the way, when the detection terminal 13 is not prevented from rotating with respect to the housing member 3 or the bus bar 25, the detection terminal 13 may be rotated by fastening of the fixing member 9, and the detection terminal 13 may be displaced. was there.

  Therefore, a pair of rotation preventing surfaces 29 and 29 are provided between the terminal portion 11 of the detection terminal 13 and the stress absorbing portion 17.

  The pair of anti-rotation surfaces 29 and 29 are fixed to the pair of anti-rotation wall surfaces 31 and 31 provided on the housing member 3 in a state where the battery pole column 5 is inserted into the terminal insertion hole 7 of the terminal portion 11. It arrange | positions so that abutting is possible on the both sides of the rotation direction of the member 9. FIG.

  Thus, by arranging the pair of anti-rotation surfaces 29 and 29 of the detection terminal 13 so as to be in contact with the pair of anti-rotation wall surfaces 31 and 31 of the housing member 3, the terminals of the detection terminal 13 in fastening of the fixing member 9. The rotation of the part 11 can be prevented.

  The pair of anti-rotation surfaces 29 and 29 are end surfaces in the length direction of the portion extending in the length direction from the terminal portion 11, but do not extend in the length direction from the terminal portion 11. The pair of extending portions may be provided in the width direction independently of the terminal portion 11, and the end surfaces in the length direction of the pair of extending portions may be used as the pair of rotation preventing surfaces 29 and 29.

  However, when the fastening force of the fixing member 9 becomes excessively large, either one of the pair of anti-rotation surfaces 29 and 29 comes into strong contact with either one of the pair of anti-rotation wall surfaces 31 and 31 to prevent rotation. The surface 29 may be deformed.

  When such a pair of rotation preventing surfaces 29, 29 is deformed, a displacement of the arrangement position of the wire connecting portion 15 provided integrally with the terminal portion 11 with respect to the housing member 3 occurs, and the wire connecting portion 15 There is a possibility that the connection reliability between the detection terminal 13 and the electric wire may be reduced due to interference with the surrounding casing member 3 and deformation of the electric wire connection portion 15.

  Therefore, the housing member 3 is provided with a pair of contact portions 19 and 19 at a portion where the stress absorbing portion 17 of the detection terminal 13 is disposed.

  The pair of abutting portions 19, 19 are erected upward from the bottom surface on which the stress absorbing portion 17 of the housing member 3 is disposed, and can come into contact with the pair of wall portions 21, 21 of the stress absorbing portion 17. Has been placed.

  When the fixing member 9 is fastened to the battery pole 5, the pair of contact portions 19, 19 are subjected to stress applied to the terminal portion 11 of the detection terminal 13, and the detection terminal 13 rotates in the rotation direction of the fixing member 9 ( When it is going to rotate in the direction of arrow A), it comes into contact with the bottom of the stress absorber 17 or the pair of walls 21, 21.

  The stress absorbing portion 17 is disposed between the terminal portion 11 and the wire connecting portion 15 by the contact between the pair of abutting portions 19 and 19 and the bottom of the stress absorbing portion 17 or the pair of wall portions 21 and 21. Therefore, the fastening force of the fixing member 9 is not absorbed by the stress absorbing portion 17 and transmitted to the wire connecting portion 15.

  For this reason, even if an excessive fastening force that causes deformation of the pair of anti-rotation surfaces 29 and 29 is applied to the fixing member 9, the stress absorbing portion 17 is in contact with the contact portion 19. Only the deformation occurs in the absorbing portion 17, and the stress is not transmitted to the electric wire connecting portion 15, and the arrangement position of the electric wire connecting portion 15 with respect to the housing member 3 does not fluctuate.

  Therefore, even if an excessive fastening force is applied to the fixing member 9, the wire connection portion 15 does not interfere with the housing member 3, and the deformation of the wire connection portion 15 can be prevented. Connection reliability can be maintained.

  In addition, since the pair of contact portions 19, 19 can contact the pair of wall portions 21, 21 erected on the stress absorption portion 17, the contact between the stress absorption portion 17 and the contact portion 19 is possible. The area can be increased, and the contact between the stress absorbing portion 17 and the contact portion 19 when the fixing member 9 is fastened can be stabilized.

  It should be noted that the pair of wall portions 21 and 21 increase the thickness of the bottom portion of the stress absorbing portion 17 and are folded against the stress absorbing portion 17 such as being folded back from one side surface to the other side surface. Any shape may be used as long as the contact area with the contact portion 19 can be increased.

  Here, when the fixing member 9 is fastened, the pair of abutting portions 19, 19 abuts against the bottom of the stress absorbing portion 17 or the pair of wall portions 21, 21. Even if the detection terminal 13 is not provided, the rotation of the detection terminal 13 can be prevented.

  For this reason, since it is not necessary to provide a detent structure on the terminal part 11 side of the detection terminal 13, it does not depend on the size of the terminal part 11 side of the housing member 3 and the size of the bus bar 25 in accordance with the battery size change. The terminal part 11 of the detection terminal 13 can be reduced in size.

  In addition, since the pair of contact portions 19, 19 can contact the pair of wall portions 21, 21 erected on the stress absorbing portion 17, the terminal portion 11 of the detection terminal 13 is in the thickness direction (arrow) When it is going to rotate in the (B direction), it comes into contact with the pair of wall portions 21, 21.

  For this reason, in a state where the terminal portion 11 of the detection terminal 13 is not fixed by the fixing member 9, the fixing member 9 can be fastened stably without rattling with respect to the battery pole 5. In addition, the detection terminal 13 can be fixed more stably.

  Here, on the upper end side of the pair of contact parts 19, a separation preventing part 23 is provided so as to be positioned above the stress absorbing part 17 of the detection terminal 13.

  The separation preventing portion 23 is formed in a plate shape separately from the pair of contact portions 19, 19 and can be inserted into a groove provided in the pair of contact portions 19, 19.

  The detachment preventing portion 23 is inserted into the groove portion of the pair of contact portions 19, 19 in a state where the stress absorption portion 17 of the detection terminal 13 is disposed between the pair of contact portions 19, 19. It arrange | positions so that it may be located in the detachment | leave direction from the housing member 3.

  By providing the separation preventing portion 23 in the pair of contact portions 19 and 19 in this way, even if an external force is applied to the detection terminal 13 in the direction away from the housing member 3, the stress absorbing portion 17 and the separation preventing portion 23. The detection terminal 13 does not come out of contact with the casing member 3, and the detection terminal 13 can be held on the casing member 3 more stably.

  Since such a detachment preventing portion 23 is provided at the pair of contact portions 19 and 19 where the stress absorbing portion 17 is disposed, when an external force is applied to the detection terminal 13 in a direction away from the housing member 3. The detachment preventing portion 23 does not come into contact with the wire connecting portion 15, and deformation of the wire connecting portion 15 can be prevented.

  The detachment preventing portion 23 is formed separately from the pair of contact portions 19, 19, but can be opened and closed via, for example, one of the pair of contact portions 19, 19 and a hinge. You may provide integrally.

  In this way, by providing the pair of contact portions 19, 19 with the separation preventing portion 23, by visually confirming the presence / absence of the separation preventing portion 23 or the opening / closing position of the separation preventing portion 23, the detection terminal 13 for the casing member 3 is detected. It is easy to check the assembly state of the assembly, and the occurrence of assembly failure can be reduced.

  In such a battery pack 1, the housing member 3 is provided with a pair of contact portions 19, 19 positioned so as to be able to contact both sides in the rotational direction of the fixing member 9 of the stress absorbing portion 17. When the battery 9 is fastened to the battery pole 5, the stress absorbing portion 17 is brought into contact with either one of the pair of contact portions 19, 19 by the fastening force of the fixing member 9.

  Since the stress absorbing portion 17 that abuts against the pair of abutting portions 19, 19 is provided between the terminal portion 11 and the wire connecting portion 15, the contact between the stress absorbing portion 17 and the abutting portion 19 is the same. Due to the contact, the fastening force by the fixing member 9 is not transmitted from the terminal portion 11 to the wire connecting portion 15.

  For this reason, even if an excessive fastening force of the fixing member 9 is applied so that the arrangement position of the detection terminal 13 with respect to the housing member 3 is changed, the stress absorbing portion 17 is brought into contact with the stress absorbing portion 17 and the contacting portion 19. 17 is only deformed, the arrangement position of the electric wire connecting portion 15 is not changed, and deformation of the electric wire connecting portion 15 can be prevented.

  Therefore, in such a battery pack 1, the stress absorbing portion 17 can prevent the deformation of the electric wire connecting portion 15 due to the fastening of the fixing member 9, and the connection reliability between the detection terminal 13 and the electric wire can be maintained. .

  Further, since the stress absorbing portion 17 is provided with a pair of wall portions 21 and 21 that can come into contact with the pair of contact portions 19 and 19, the contact between the stress absorbing portion 17 and the contact portion 19 is established. The area can be increased, and the contact between the stress absorbing portion 17 and the contact portion 19 when the fixing member 9 is fastened can be stabilized.

  Further, since the pair of contact portions 19, 19 are provided with a separation preventing portion 23 positioned in the direction in which the detection terminal 13 is detached from the housing member 3, the stress absorbing portion 17 contacts the separation preventing portion 23. By contacting, the deformation of the wire connection portion 15 due to the contact between the wire connection portion 15 and the separation preventing portion 23 can be prevented, and the separation of the detection terminal 13 from the housing member 3 can be prevented.

(Second Embodiment)
A second embodiment will be described with reference to FIGS.

  In the battery pack 101 according to the present embodiment, a convex portion 103 is provided on the bus bar 25, and a concave portion 105 that can be fitted to the convex portion 103 is provided on the detection terminal 13.

  Further, the concave portion 105 is provided with a cross-shaped through groove 107, and the dimension of the intersecting portion 109 of the through groove 107 is set smaller than the dimension of the convex portion 103.

  In addition, the same code | symbol is attached | subjected to the structure similar to 1st Embodiment, and a structure and description of function shall refer to 1st Embodiment, but since it is the same structure, the effect | action and effect obtained are the same. It is the same.

  As shown in FIGS. 6 to 8, the bus bar 25 is pressed or welded to the bus bar 25 at a portion adjacent to the bus bar insertion hole 27 and positioned in the direction of the electric wire connecting portion 15 side of the detection terminal 13. For example, a cylindrical convex portion 103 is projected upward.

  The convex portion 103 can be fitted with a concave portion 105 provided in the detection terminal 13 disposed on the upper surface of the bus bar 25.

  The concave portion 105 is located between the terminal portion 11 of the detection terminal 13 and the stress absorbing portion 17, and the battery pole 5 (see FIG. 1) is inserted into the terminal insertion hole 7 of the terminal portion 11. It is provided at a position corresponding to the 25 convex portions 103.

  The recess 105 is positioned at the center of a cross-shaped hole that penetrates the detection terminal 13 in the plate thickness direction, and is set to have an inner diameter smaller than the outer diameter of the protrusion 103.

  Specifically, the detection terminal 13 is provided with a cross-shaped through groove 107 that penetrates the detection terminal 13 in the thickness direction, and an intersection 109 of the through groove 107 is a recess 105.

  The dimension, that is, the inner diameter of the intersecting portion 109 constituting the recess 105 is set to be smaller than the dimension of the projecting portion 103, that is, the outer diameter so that the projecting portion 103 can be press-fitted.

  When the terminal portion 11 of the detection terminal 13 is disposed on the battery pole 5, the convex portion 103 of the bus bar 25 previously disposed on the battery pole 5 is press-fitted into the recess 105. 13 is temporarily fixed to the pole 5 of the battery.

  Before the bus bar 25 is arranged on the battery pole 5, the detection terminal 13 is temporarily assembled to the bus bar 25 by fitting the concave portion 105 of the detection terminal 13 to the convex portion 103 of the bus bar 25. The bus bar 25 temporarily assembled with 13 may be disposed on the battery pole 5.

  The fastening force of the fixing member 9 is obtained by fastening the fixing member 9 (see FIG. 1) to the battery pole 5 in a state where the convex portion 103 and the concave portion 105 are fitted and the detection terminal 13 is temporarily fixed. Can be received by the convex portion 103 and the concave portion 105.

  For this reason, transmission of the fastening force of the fixing member 9 to the stress absorbing portion 17 and the pair of contact portions 19 and 19 (see FIG. 2) can be reduced, and the fastening force of the fixing member 9 is applied to the wire connection portion 15. It is possible to further prevent transmission.

  In addition, since the dimension of the intersecting portion 109 of the through groove 107 of the recess 105 is set smaller than the dimension of the projecting portion 103, the projecting portion 103 and the recess 105 are pressed by the projecting portion 103 being pressed into the intersecting portion 109. The fastening force of the fixing member 9 can be stably received.

  Here, in a state where the convex portion 103 and the concave portion 105 are fitted and the detection terminal 13 is temporarily fixed, the terminal portion 11 of the detection terminal 13 does not rotate.

  Even when the convex portion 103 and the concave portion 105 are fitted, the stress absorbing portion 17 of the detection terminal 13 is located between the pair of contact portions 19 and 19 (see FIG. 2) of the housing member 3. Therefore, the rotation prevention of the detection terminal 13 is further strengthened, and the detection terminal 13 can be fixed to the battery pole 5 more stably.

  In addition, by providing the convex portion 103 and the concave portion 105 in a portion adjacent to the bus bar insertion hole 27 and the terminal insertion hole 7, even if the bus bar 25 is resized in accordance with the battery size change, the convex portion 103 or There is no change in the position where the recess 105 is provided, and there is no significant design change.

  In such a battery pack 101, the protrusion 103 is provided on the bus bar 25, and the detection terminal 13 is provided with the recess 105 that can be fitted to the protrusion 103. The fastening force of the fixing member 9 can be received by the fitting, and the fastening force of the fixing member 9 can be further prevented from being transmitted to the wire connection portion 15.

  Further, the concave portion 105 is provided with a cross-shaped through groove 107, and the dimension of the intersecting portion 109 of the through groove 107 is set smaller than the dimension of the convex portion 103, so that the convex portion 103 intersects the through groove 107. The fitting force of the fixing member 9 can be received more stably by being press-fitted into the portion 109 and by fitting the convex portion 103 and the concave portion 105.

(Third embodiment)
A third embodiment will be described with reference to FIGS.

  The battery pack 201 according to the present embodiment is provided with a plurality of convex portions 203 and concave portions 205.

  In addition, the same code | symbol is attached | subjected to the structure similar to other embodiment, and description of a structure and function shall refer to other embodiment, and since it is the same structure, the effect | action and effect obtained are the same. It is the same.

  As shown in FIGS. 9 to 11, the convex portion 203 is adjacent to the bus bar insertion hole 27 of the bus bar 25, and upwards in the circumferential direction of the bus bar insertion hole 27 by pressing or welding to the bus bar 25. A plurality (three in this case) protrudes in a columnar shape.

  The plurality of protrusions 203 can be respectively fitted with the plurality of recesses 205 provided in the detection terminal 13 disposed on the upper surface of the bus bar 25.

  The recess 205 is positioned on the outer peripheral edge of the terminal portion 11 of the detection terminal 13, and the plurality of protrusions of the bus bar 25 are inserted in a state where the battery pole 5 (see FIG. 1) is inserted into the terminal insertion hole 7 of the terminal portion 11. A plurality of (here, three) semicircles are provided at positions corresponding to the portions 203.

  By inserting the terminal portion 11 of the detection terminal 13 into the concave portion 205 from the portion where the distance between the plurality of convex portions 203 of the bus bar 25 is longest before the bus bar 25 is arranged on the battery pole 5. The terminal portion 11 is inserted while being deformed, and the plurality of convex portions 203 are respectively fitted by the restoring force of the terminal portion 11.

  By providing a plurality of convex portions 203 and concave portions 205 in this way, there are a plurality of fitting portions between the convex portions 203 and the concave portions 205, and the portion receiving the fastening force of the fixing member 9 (see FIG. 1) can be increased. it can.

  For this reason, transmission of the fastening force of the fixing member 9 to the stress absorbing portion 17 and the pair of contact portions 19 and 19 (see FIG. 2) can be greatly reduced, and the fastening force of the fixing member 9 is reduced to the wire connecting portion. 15 can be reliably prevented.

  Here, in a state where the plurality of convex portions 203 and the plurality of concave portions 205 are fitted and the detection terminal 13 is temporarily assembled on the bus bar 25, the detection terminal 13 does not rotate with respect to the bus bar 25.

  Even if the bus bar 25 on which the detection terminal 13 is temporarily assembled is arranged on the battery pole 5 and the fixing member 9 (see FIG. 1) is fastened to the battery pole 5, the detection terminal is detected by the fastening force of the fixing member 9. The 13 terminal portions 11 do not rotate.

  The bus bar 25 is first arranged on the battery pole 5, and the terminal portion 11 of the detection terminal 13 is placed on the battery pole so that the plurality of protrusions 203 and the plurality of recesses 205 are fitted from above the bus bar 25. The fixing member 9 may be fastened to the battery pole column 5.

  By fitting the plurality of convex portions 203 and the plurality of concave portions 205 in this way, the terminal portion 11 of the detection terminal 13 is not rotated by the fastening force of the fixing member 9, and the pair of rotation prevention surfaces 29, 29 (Refer FIG. 1) and a pair of rotation prevention wall surfaces 31 and 31 (refer FIG. 1) can be abolished.

  In addition, the stress absorbing portion 17 of the detection terminal 13 can come into contact with the pair of contact portions 19 and 19 of the housing member 3 even when the plurality of convex portions 203 and the plurality of concave portions 205 are fitted. Therefore, the rotation of the terminal portion 11 due to the fastening of the fixing member 9 can be prevented more firmly, and the detection terminal 13 can be more stably fixed to the electrode pole 5 of the battery.

  In such a battery pack 201, since the convex part 203 and the recessed part 205 are provided with two or more, the fitting location of the convex part 203 and the recessed part 205 becomes multiple, and also the fastening force of the fixing member 9 is stabilized more stably. Therefore, the influence of the fastening force of the fixing member 9 on the wire connecting portion 15 can be greatly suppressed.

  In the battery pack according to the embodiment of the present invention, the detection terminal is provided with a pair of anti-rotation surfaces, and the housing member is provided with a pair of anti-rotation wall surfaces. When the detection terminal can be sufficiently prevented from rotating with the contact portion, the detection terminal need not be provided with a pair of anti-rotation surfaces.

  Moreover, although the convex part is provided in the bus bar, it is not restricted to this, A convex part may be provided in a housing | casing member, and what is necessary is just to provide a recessed part in a detection terminal according to the convex part of this housing member.

  Further, the shape of the convex portion and the concave portion is not limited to the intersection of the cylindrical or cross-shaped through grooves, the cylindrical shape or the semicircular shape. For example, the convex portion is formed in a prismatic shape and the concave portion is formed in a prismatic convex shape. As long as the convex part and the concave part can be fitted, such as a bottomed concave part into which the part can be fitted, the shape of the convex part and the concave part may be any.

  In addition, the plurality of convex portions and the plurality of concave portions are each provided in three, but the present invention is not limited thereto, and a plurality of convex portions and a plurality of concave portions may be provided in each of four or more.

DESCRIPTION OF SYMBOLS 1,101,201 ... Battery pack 3 ... Housing member 5 ... Polar pole 7 ... Terminal insertion hole 9 ... Fixing member 11 ... Terminal part 13 ... Detection terminal 15 ... Electric wire connection part 17 ... Stress absorption part 19 ... Contact part 21 ... Wall 23 ... Detachment prevention part 25 ... Bus bar 103, 203 ... Projection 107 ... Through groove 109 ... Intersection 105, 205 ... Recess

Claims (6)

A housing member that houses a plurality of batteries;
A detection terminal disposed on the housing member;
A flat terminal portion that is provided via a fixing member that is provided in the detection terminal and is provided with a terminal insertion hole that is inserted into the battery pole and is fastened to the pole;
An electric wire connecting portion provided on the detection terminal and integrally provided with the terminal portion and connected to an end portion of the electric wire;
A stress absorption part provided integrally with the terminal part and the electric wire connection part between the terminal part and the electric wire connection part provided in the detection terminal;
A pair of abutting portions provided on the housing member, the stress absorbing portions being disposed and being positioned so as to be able to abut on both sides of the stress absorbing portion in the rotation direction of the fixing member;
A battery pack comprising: The battery pack according to claim 1,
The battery pack according to claim 1, wherein the stress absorbing portion is provided with a pair of wall portions that can come into contact with the pair of contact portions. The battery pack according to claim 1 or 2,
The housing member is provided with a bus bar that is inserted through the battery pole and connects the batteries.
At least one of the housing member and the bus bar is provided with a protrusion,
The battery pack, wherein the detection terminal is provided with a concave portion that can be fitted to the convex portion. The battery pack according to claim 3,
The recess is provided with a cross-shaped through groove,
The battery pack, wherein a dimension of the intersection of the through grooves is set smaller than a dimension of the convex part. The battery pack according to claim 3 or 4,
A battery pack comprising a plurality of the convex portions and the concave portions. The battery pack according to any one of claims 1 to 5,
The battery pack according to claim 1, wherein the pair of contact portions are provided with a separation preventing portion positioned in a direction in which the detection terminal is detached from the housing member.

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