JP2019040807A - Assembled battery - Google Patents

Abstract

To provide an assembled battery capable of preventing damage to a fuse portion at the time of installation.SOLUTION: An assembled battery 100 according to the present invention includes a case 110 for housing a battery cell 150 therein, a bus bar 280 held by the case 110, and a fuse portion 240 held by the case 110 and having a terminal 240b overlapped with the bus bar 280. The terminal 240b of the fuse portion 240 is disposed between the bus bar 280 and the case 110, and is fixed to the case 110 from the outer surface side of the bus bar 280 via the bus bar 280.SELECTED DRAWING: Figure 12

Description

  The present invention relates to an assembled battery.

  Conventionally, a battery pack in which a plurality of battery cells are housed in a member such as a housing is known. For example, Patent Document 1 discloses an assembled battery in which a fuse can be easily replaced while the battery is housed in a waterproof structure, and the waterproof structure can be realized even after the fuse is replaced.

JP 2011-049014 A

  However, in the assembled battery described in Patent Literature 1, when a fuse is attached, a fuse connection terminal is disposed on the bus bar, and the fuse connection terminal and the bus bar are fixed by screwing from the outer surface side of the connection terminal. In such an arrangement, the friction of the fastening member such as a screw causes rotation of the fuse part itself, which may lead to physical damage accompanying deformation of the fuse part. Further, the fuse body is structurally fragile and may be broken even by a slight impact.

  An object of the present invention made in view of such a problem is to provide an assembled battery capable of preventing the fuse portion from being damaged at the time of attachment.

In order to solve the above problems, an assembled battery according to an embodiment of the present invention is provided.
A case for accommodating the battery cell inside,
A bus bar held in the case;
A fuse part that is held in the case, and a terminal overlaps with the bus bar;
With
The terminal of the fuse part is disposed between the bus bar and the case, and is fixed to the case from the outer surface side of the bus bar via the bus bar.

  According to the assembled battery according to the embodiment of the present invention, it is possible to prevent the fuse portion from being damaged at the time of attachment.

It is an external appearance perspective view of the assembled battery which concerns on one Embodiment of this invention. It is an external appearance perspective view which shows the state which removed the upper case and gas exhaust pipe of the assembled battery. It is a figure which shows a fusible link single-piece | unit. It is a perspective view which shows arrangement | positioning of the battery cell accommodated in the assembled battery of FIG. It is a disassembled perspective view of the assembled battery of FIG. It is a figure which shows the state in which the battery cell was accommodated in the lower case and the cell holder. It is a perspective view of the assembled battery with which the sensor board | substrate was attached. It is a front view of the assembled battery with which the sensor board | substrate was attached. It is a top view of the assembled battery with the BAT case attached. It is a front view of the assembled battery of the state which connected the gas exhaust pipe to the gas duct. It is sectional drawing along the XI-XI arrow line of FIG. It is the expanded sectional view which expanded the XII part of FIG. It is the enlarged view corresponding to the XIII part of FIG. 2 which mainly showed the upper surface of the lower case.

  Hereinafter, an assembled battery 100 according to an embodiment of the present invention will be described with reference to the drawings. The drawings are schematic. The dimensions or ratios on the drawings do not necessarily match the actual ones. The depiction of each component in each drawing may be partially simplified.

  FIG. 1 is an external perspective view of an assembled battery 100 according to an embodiment of the present invention. FIG. 2 is an external perspective view showing a state where the upper case 300 and the gas exhaust pipe 600 of the assembled battery 100 are removed. FIG. 3 is a diagram showing the fusible link 240 alone. The assembled battery 100 includes an upper case 300, a lower case 110, a cell holder 120, a BAT case 500, and a gas exhaust pipe 600. The assembled battery 100 has a substantially rectangular parallelepiped shape. The surface facing the positive direction of the Y axis is also referred to as the first side surface of the battery pack 100. The surface facing the negative direction of the Y axis is also referred to as the second side surface of the battery pack 100. The surface facing the positive direction of the Z axis is also referred to as the upper surface of the assembled battery 100. The surface facing the negative direction of the Z axis corresponding to the opposite side of the upper surface is also referred to as the bottom surface of the battery pack 100. The surface facing the positive direction of the X axis is also referred to as the front surface of the battery pack 100. The surface facing the negative direction of the X axis corresponding to the opposite side of the front surface is also referred to as the back surface of the battery pack 100. The names of the surfaces of the assembled battery 100 can be applied as names indicating the surfaces of the lower case 110, the cell holder 120, and the BAT case 500. The descriptions of “lower” and “upper” are identifiers for distinguishing configurations. In the present embodiment, the configuration shown as the lower case 110 is located at the lower portion of the configuration shown as the upper case 300, but is not limited to the lower portion, and may be located at the upper portion or the side portion.

  The lower case 110, the cell holder 120, and the BAT case 500 are engaged with each other on the first side surface side by the engaging member 180. The lower case 110, the cell holder 120, and the BAT case 500 are engaged with each other also on the second side surface by the engaging member 180. A member in which the lower case 110, the cell holder 120, and the BAT case 500 are engaged is also referred to as a battery case. The lower case 110, the cell holder 120, the BAT case 500, and the battery case are also simply referred to as cases. Battery cells 150 (see FIG. 4) are accommodated in the battery case. The battery cell 150 may be a secondary battery such as a lithium ion battery or a nickel metal hydride battery.

  The lower case 110, the cell holder 120, and the BAT case 500 may be made of a resin such as PBT (Poly-Butylene Terephthalate).

  The upper case 300 has a recess 301 in a part of the side where the upper surface and the front surface are connected. The upper case 300 has a recess 302 in a part of the side connecting the upper surface and the first side surface. The assembled battery 100 includes a first terminal 250 and a second terminal 260 at positions where the concave portion 301 and the concave portion 302 are provided, respectively. A packing 270 is disposed so as to surround the first terminal 250. Similarly, the packing 270 is disposed so as to surround the second terminal 260. The packing 270 is preferably formed of an arbitrary member having elasticity. However, the present invention is not limited to this, and the packing 270 may not have elasticity.

  The upper case 300 has an opening 303 on the first side surface. The assembled battery 100 includes a connector 310 at a position where the opening 303 is provided.

  The assembled battery 100 may include relays 221 and 222 on the upper surface of the battery case. Relays 221 and 222 are collectively referred to as relay 220 when they do not need to be distinguished from each other. The relay 220 may be positioned on the lower case 110 or may be positioned over the lower case 110 and the cell holder 120. The number of relays 220 is not limited to two and may be one or three or more.

  The assembled battery 100 may include a bus bar 160 that is electrically connected to a terminal of the battery cell 150. The bus bar 160 may be connected to the positive terminal and the negative terminal of the battery cell 150, respectively. The assembled battery 100 may include a copper bus bar 280 on the upper surface of the battery case. The number of copper bus bars 280 included in the assembled battery 100 is not limited to five, and may be four or less, or may be six or more. Hereinafter, the five copper bus bars 280 are distinguished as copper bus bars 280a to 280e, respectively. When not distinguishing each copper bus bar, the copper bus bar 280 is collectively referred to.

  Relay 221 may be electrically connected to bus bar 160 at one end via copper bus bar 280a. The relay 221 may be electrically connected to the first terminal 250 through the copper bus bar 280b at the other end. Relay 222 may be electrically connected to bus bar 160 at one end via copper bus bar 280c. The relay 222 may be electrically connected to the second terminal 260 through the copper bus bar 280d, the fusible link 240, and the copper bus bar 280e at the other end. The relay 221 and the relay 222 function as a switching element that connects or disconnects the battery cell 150 in parallel with each component outside the assembled battery 100 in the power supply system.

  The upper case 300 may be made of a resin such as PBT, for example. The upper case 300 covers the battery cell 150, the copper bus bar 280, the relay 220, the sensor substrate 230, and the fusible link 240, thereby preventing corrosion and short circuit of electronic components and metal parts inside the assembled battery 100.

  The sensor substrate 230 is electrically connected to the battery cell 150 and measures a current flowing through a circuit including the first secondary battery or a voltage applied to the circuit including the battery cell 150 by an appropriate method. The sensor substrate 230 includes a BMS (Battery Management System). The BMS is communicably connected to the control unit of the power supply system, and controls the relay 220 and the sensor board 230.

  As shown in FIG. 3, the fusible link 240 (fuse portion) includes a fuse body, an insulating resin housing for housing and holding the fuse body, an insulating resin cover 240a for covering the housing, and opposite directions at both ends. And a pair of protruding terminals 240b. A substantially circular through hole 240c is formed in a substantially central portion of the terminal 240b. The fuse body of the fusible link 240 is blown when an overcurrent occurs.

  Assume that the assembled battery 100 according to the present embodiment is mounted and used in a vehicle such as a vehicle including an internal combustion engine, a hybrid vehicle capable of traveling with the power of both the internal combustion engine and the electric motor. The assembled battery 100 may be mounted under a vehicle seat, for example. The assembled battery 100 may be mounted on a center console of a vehicle, for example. The assembled battery 100 is not limited to a vehicle, and may be used for other purposes.

  FIG. 4 is a perspective view showing the arrangement of the battery cells 150 accommodated in the assembled battery 100. The assembled battery 100 according to the present embodiment accommodates five battery cells 150-1 to 150-5. The number of battery cells 150 accommodated in the assembled battery 100 is not limited to five. The number of battery cells 150 accommodated in the assembled battery 100 can be appropriately determined according to the maximum output of the battery cells 150, the power consumed by a driven device such as a vehicle, and the like.

  The battery cell 150 has a substantially rectangular parallelepiped shape having six surfaces. Two of the six surfaces of the battery cell 150 have a larger area than the other four surfaces. Two surfaces having a relatively large area among the surfaces of the battery cell 150 are also referred to as flat surfaces. The battery cell 150 is disposed such that the flat surface is directed in the positive direction and the negative direction of the Z axis. In other words, the battery cell 150 is disposed such that the flat surface is substantially parallel to the upper surface and the bottom surface of the assembled battery 100. It can be said that the flat surface of the battery cell 150 is arranged along the upper surface of the case.

  In the assembled battery 100 according to this embodiment, the battery cells 150 are stacked in the Z-axis direction in two stages and three stages. The battery cells 150 stacked in two stages are arranged on the positive side of the Y axis. The battery cells 150 stacked in three stages are arranged on the negative direction side of the Y axis. The number of battery cells 150 stacked may be appropriately changed according to the number of battery cells 150 accommodated in the assembled battery 100.

  The surface on the positive side of the X axis of the battery cell 150 is also referred to as a cap surface 151. The battery cell 150 is disposed so that the cap surface 151 faces the front side of the battery pack 100. The battery cell 150 includes a positive electrode terminal 152, a negative electrode terminal 153, and a safety valve 154 on the cap surface 151. The cap surface 151 has a substantially rectangular shape having a long side and a short side. The positive terminal 152 and the negative terminal 153 are provided near both ends of the cap surface 151 in the long side direction. The positive terminal 152 and the negative terminal 153 are electrodes that output power from the battery cell 150. The positive electrode terminal 152 and the negative electrode terminal 153 are collectively referred to as an electrode terminal.

  The safety valve 154 is provided between the positive terminal 152 and the negative terminal 153. The safety valve 154 is opened to discharge the gas to the outside when the pressure generated in the battery cell 150 causes the pressure inside the battery cell 150 to exceed a predetermined pressure. The internal pressure of the battery cell 150 may be equal to or higher than a predetermined pressure when the battery cell 150 is deteriorated with age or when a thermal runaway occurs. The predetermined pressure can be appropriately determined according to the specifications of the battery cell 150.

  FIG. 5 is an exploded perspective view of the battery pack 100 shown in FIG. The battery module may be assembled as follows. The battery cells 150 are stacked in three and two stages with the insulating sheet 155 interposed therebetween, and are accommodated between the lower case 110 and the cell holder 120. Lower case 110 and cell holder 120 are engaged by engagement member 180. Copper bus bar 280, relay 220, and fusible link 240 are attached to the upper surface of lower case 110 and cell holder 120. A bus bar 160 is attached to the electrode terminal of the battery cell 150. FIG. 6 shows a state in which the battery cell 150 is accommodated in the lower case 110 and the cell holder 120. A gas cover 610 is attached to the cap surface 151 side of the battery cell 150 with a seal 630 interposed therebetween. The sensor substrate 230 is attached to the sensor attachment terminal of the bus bar 160. 7 and 8 are a perspective view and a front view of the assembled battery 100 to which the sensor substrate 230 is attached. After the sensor substrate 230 is attached, the BAT case 500 is engaged with the cell holder 120 by the engaging member 180 so as to cover the cap surface 151 side of the battery cell 150. FIG. 9 shows a top view of the assembled battery 100 to which the BAT case 500 is attached. After the BAT case 500 is attached, the gas discharge pipe 600 is attached to the gas duct 611 of the gas cover 610.

  The upper case 300 is attached so as to cover the entire battery module. The upper case 300 and the battery case are engaged with each other on the front side and the back side by the engaging member 190. The upper case 300 and the battery case may be engaged with each other, for example, by fitting a claw and a hole. The assembled battery 100 can be assembled according to the procedure example described above.

  In the assembly of the battery module, the battery cell 150 may be bonded to the cell holder 120 with an adhesive. The adhesive may be any adhesive that can bond the battery cell 150 and the cell holder 120. The adhesive may be, for example, an acrylic adhesive or an epoxy adhesive. The adhesive may be applied to the cell holder 120. The adhesive may be applied to a portion of the cell holder 120 that faces the cap surface 151 of the battery cell 150. The battery cell 150 may be inserted into the cell holder 120 after an adhesive is applied to the cell holder 120.

  After the battery cell 150 and the cell holder 120 are bonded, the bus bar 160 may be welded to the electrode terminal of the battery cell 150. When the electrode terminal and the bus bar 160 are welded, a high accuracy may be required for the positional relationship between the electrode terminal and the bus bar 160. In this case, the electrode terminal and the bus bar 160 can be easily welded by increasing the accuracy of the application position of the adhesive that bonds the battery cell 150 and the cell holder 120. Further, the battery cell 150 and the cell holder 120 are bonded to each other before the bus bar 160 is welded to the battery cell 150, so that the productivity of the battery module can be improved.

  The assembled battery 100 according to the present embodiment includes a first terminal 250 on the front side and a second terminal 260 on the first side surface (see FIG. 9). As described above, the first terminal 250 and the second terminal 260 are arranged on different surfaces, so that they can be easily identified. By doing in this way, it becomes easy to prevent the incorrect wiring at the time of mounting the assembled battery 100 in a vehicle.

  The length of the cable electrically connected to the first terminal 250 may be configured to be different from the length of the cable electrically connected to the second terminal 260. By doing in this way, it becomes easy to prevent the incorrect wiring at the time of mounting the assembled battery 100 in a vehicle.

  As shown in FIG. 5, the assembled battery 100 includes a gas cover 610 on the front side. The gas cover 610 may be made of a resin such as PBT, for example. FIG. 10 shows a front view of the assembled battery 100 in a state where the gas discharge pipe 600 is connected to the gas duct 611 of the gas cover 610. As shown in FIG. 10, the gas duct 611 protrudes from the opening 510 of the BAT case 500 to the front side of the BAT case 500. The front end 612 (see FIG. 5) of the gas duct 611 is inserted from the end of the gas exhaust pipe 600, and the gas duct 611 and the gas exhaust pipe 600 communicate with each other in a sealed state. The gas exhaust pipe 600 has a bifurcated structure in which a second pipe 603 is joined to an intermediate portion 602 of the first pipe 601 so as to be attached to each of the two gas ducts 611. One end of the first tube 601 is connected to the gas duct 611 on the battery cell 150-4 to 5 side, and the other end extends to the external space. One end of the second pipe 603 is connected to the gas duct 611 on the battery cell 150-1-3 side, and the other end is joined to the intermediate portion 602 of the first pipe 601.

  11 is a cross-sectional view taken along the line XI-XI in FIG. 12 is an enlarged cross-sectional view of the XII portion of FIG. FIG. 13 is an enlarged view corresponding mainly to the XIII portion of FIG. 2, mainly showing the upper surface of the lower case 110. Hereinafter, the arrangement of the fusible link 240 will be described in detail mainly using FIGS. 9 and 11 to 13.

  As shown in FIG. 9, the fusible link 240 and the copper bus bar 280 are held on the upper surface of the battery case, particularly the lower case 110. The terminal 240b of the fusible link 240 and the copper bus bars 280d and 280e are arranged so as to overlap each other along the vertical direction.

  More specifically, as shown in FIGS. 12 and 13, the fusible link 240 is disposed in a state where the cover 240 a and the terminal 240 b are accommodated in the recess 111 formed by a rib protruding from the upper surface side of the lower case 110. The The recess 111 is preferably formed so as to correspond to the outer shape of the terminal 240 b of the fusible link 240. For example, the concave portion 111 may have a corresponding portion formed to have the same thickness as the terminal 240b, so that the surface of the lower case 110 and the upper surface of the terminal 240b may form the same plane. That is, the concave portion 111 may be formed so that the support surface of the copper bus bar 280 disposed immediately above is constituted by a single plane. At this time, the pair of terminals 240 b are disposed on the bolt holes 112 formed on both sides of the recess 111. In particular, the pair of terminals 240b is disposed on the bolt hole 112 so that the bolt hole 112 and the through hole 240c overlap in the vertical direction. The position of the terminal 240 b is determined by the rib wall that forms the recess 111.

  The two copper bus bars 280d and 280e are installed from above the terminal 240b so that the end portions overlap with each other in contact with the pair of terminals 240b. The copper bus bar 280 is disposed such that the bolt hole 281 formed at the end portion overlaps the bolt hole 112 and the through hole 240c in the vertical direction. As shown in FIG. 13, the position of the copper bus bar 280 is determined by the rib wall protruding from the lower case 110. At this time, as shown in FIG. 9, the terminal 240b is completely covered by the ends of the copper bus bars 280d and 280e.

  Thus, the terminal 240b is disposed between the copper bus bar 280 and the lower case 110 (see FIG. 12). In this state, the terminal 240 b is fixed to the lower case 110 via the copper bus bar 280 from the outer surface side, that is, the upper surface side of the copper bus bar 280. In particular, the terminal 240b contacts the lower case 110 and the copper bus bar 280, and is fixed in a state of being sandwiched between them. The terminal 240b is preferably fixed to the lower case 110 together with the copper bus bar 280 by an appropriate fastening member such as a bolt 112a. That is, the bolts 112a are inserted from above the bolt holes 112, the through holes 240c, and the bolt holes 281 that are overlapped in the vertical direction, and the bolt holes 112 and the bolts 112a are screwed together, thereby fixing the terminal 240b. At this time, since the terminal 240b is completely covered by the end portion of the copper bus bar 280, the bolt 112a and the fusible link 240 are not in direct contact with each other. The bolt 112 a fixes the terminal 240 b to the lower case 110 through the copper bus bar 280 in a state of being in direct contact with the copper bus bar 280. The terminal 240b may be configured to be fastened with the bolt 112a to the lower case 110 via the copper bus bar 280, so that another member is interposed between the copper bus bar 280 and the lower case 110. May be.

  The lower case 110 includes a bus bar restricting portion 113 that restricts the position of the copper bus bar 280, particularly the copper bus bar 280d (see FIG. 13). The bus bar restricting portion 113 is configured by a rib protruding from the surface of the lower case 110. In particular, the bus bar restricting portion 113 is formed in a pair along the direction perpendicular to the extending direction of the copper bus bar 280d disposed on the relay 222 side, and sandwiches the copper bus bar 280d from the front and rear sides.

  According to the assembled battery 100 according to the embodiment of the present invention, the fusible link 240 can be prevented from being damaged at the time of attachment. That is, by fixing the terminal 240b to the lower case 110 from the outer surface side of the copper bus bar 280 via the copper bus bar 280, the assembled battery 100 is provided with the fusible link 240 itself by friction caused by the rotation of the bolt 112a. To prevent. That is, since the copper bus bar 280 tends to have a longer and larger mass than the fusible link 240, it is difficult for the copper bus bar 280 to cause rotation even in contact with the bolt 112a. By preventing the copper bus bar 280 from rotating, the assembled battery 100 can also prevent the fusible link 240 disposed below the battery pack 100 from rotating.

  Thus, the assembled battery 100 can prevent physical damage due to deformation of the fusible link 240. The assembled battery 100 avoids direct contact with the structurally fragile fusible link 240, and the more rigid copper bus bar 280 and the bolt 112 a are in direct contact, so that the fusible link 240 is properly connected when the bolt 112 a is fastened. Can be protected.

  The assembled battery 100 can relieve the impact caused by the fastening of the bolt 112a through the copper bus bar 280. In particular, the assembled battery 100 can alleviate the transmission of torque to the fusible link 240 accompanying the rotation of the bolt 112a. Thereby, the assembled battery 100 can prevent the fuse body of the fusible link 240 that is structurally fragile from being disconnected unintentionally.

  The assembled battery 100 can protect the fusible link 240 more effectively because the terminal 240b is sandwiched between the lower case 110 and the copper bus bar 280. That is, the assembled battery 100 can generate a resistance force against the rotation by pressing the terminal 240b against the lower case 110 via the copper bus bar 280 by the downward pressing force when the bolt 112a is fastened. Thereby, the assembled battery 100 can more effectively prevent the fusible link 240 from rotating. In addition, the assembled battery 100 has the terminal 240b directly sandwiched between the lower case 110 and the copper bus bar 280, so that it is not necessary to provide extra parts between them, and the effect of preventing rotation is more remarkable. be able to. In addition, the assembled battery 100 can maintain the electrical connection between the terminal 240b and the copper bus bar 280 well.

  The assembled battery 100 can fix the fusible link 240 only by a dynamic action by fixing the terminal 240b to the lower case 110 by a fastening member such as a bolt 112a. For example, when the terminal 240b and the copper bus bar 280 are connected by a thermal action such as welding, the fuse body may be blown by heat generated during welding. The assembled battery 100 eliminates the possibility of such fusing due to heat, and can prevent unintentional disconnection of the fuse body during the mounting operation. The assembled battery 100 can appropriately protect the fusible link 240 during the attaching operation.

  The assembled battery 100 has the bus bar restricting portion 113, so that it is possible to more effectively prevent the copper bus bar 280 from rotating due to friction with the bolt 112a. In particular, the bus bar restricting portion 113 is formed so as to sandwich the copper bus bar 280d from both sides, whereby the rotation of the copper bus bar 280d can be restricted.

  Moreover, the assembled battery 100 can be more effectively restricted from rotating the copper bus bar 280 by being constituted by a pair of ribs provided with the bus bar restricting portion 113 protruding. In addition, the assembled battery 100 facilitates the attachment of the copper bus bar 280. That is, the assembled battery 100 can improve assemblability by the pair of ribs functioning as a guide to the attachment position of the copper bus bar 280.

  The assembled battery 100 includes the recess 111 that accommodates the terminal 240b, so that the fusible link 240 can be stably disposed. That is, since the terminal 240b accommodated in the concave portion 111 comes into contact with the rib wall constituting the concave portion 111 even when attempting to rotate, the movement in the rotational direction is strongly restricted. Thereby, the assembled battery 100 can prevent the rotation at the time of bolt 112a fastening, and can protect the fusible link 240 appropriately.

  Furthermore, the assembled battery 100 can restrict | limit rotation of the fusible link 240 more strongly because the recessed part 111 respond | corresponds to the external shape of the terminal 240b. In particular, in the battery pack 100, the surface of the lower case 110 and the upper surface of the terminal 240b constitute the same plane, so that the support surface of the copper bus bar 280 arranged immediately above is constituted by one plane. Thereby, the assembled battery 100 can prevent the copper bus bar 280 from rattling.

  It will be apparent to those skilled in the art that the present invention can be realized in other predetermined forms other than the above-described embodiments without departing from the spirit or essential characteristics thereof. Accordingly, the foregoing description is illustrative and not restrictive. The scope of the invention is defined by the appended claims rather than by the foregoing description. Some of all changes that fall within the equivalent scope shall be included therein.

  Although it has been described that no other component is interposed between the terminal 240b, the lower case 110, and the copper bus bar 280, the present invention is not limited to this. As long as the assembled battery 100 can appropriately protect the terminal 240 b, any component may be disposed between the terminal 240 b, the lower case 110, and the copper bus bar 280.

  The method for fixing the terminal 240b to the lower case 110 is not limited to the method using the fastening structure by the bolt 112a and the bolt hole 112, and may be a method using any fastening structure, or any other fixing method. It may be.

  The assembled battery 100 does not need to have the bus bar regulating unit 113 as long as the copper bus bar 280 can be appropriately prevented from being turned when the bolt 112a is fastened.

  Furthermore, the bus bar restricting portion 113 is not limited to the structure as shown in FIG. 13, and may have an arbitrary structure that can appropriately prevent the copper bus bar 280 from rotating.

  The assembled battery 100 is not limited to the configuration having the recess 111 that accommodates the terminal 240b. The assembled battery 100 may not have the recess 111 as long as the arrangement of the fusible link 240 can be stabilized.

  The recess 111 is not limited to the configuration corresponding to the outer shape of the terminal 240b. For example, the recess 111 may be formed in any shape that can prevent the copper bus bar 280 from rattling.

100 assembled battery 110 lower case (case)
111 Concave portion 112 Bolt hole 112a Bolt (fastening member)
113 Bus bar regulating part 120 Cell holder (case)
150 battery cell 151 cap surface 152 positive electrode terminal 153 negative electrode terminal 154 safety valve 155 insulation sheet 160 bus bar 180, 190 engagement member 220 (221, 222) relay 230 sensor substrate 240 fusible link (fuse part)
240a cover 240b terminal 240c through hole 250 first terminal 260 second terminal 270 packing 280 (280a, 280b, 280c, 280d, 280e) copper bus bar 281 bolt hole 300 upper case 301, 302 recess 303 opening 310 connector 500 BAT case (case) )
510 opening 600 gas discharge pipe 601 first pipe 602 middle part 603 second pipe 610 gas cover 611 gas duct 612 tip 630 seal

Claims (7)

A case for accommodating the battery cell inside,
A bus bar held in the case;
A fuse part that is held in the case, and a terminal overlaps with the bus bar;
With
The terminal of the fuse portion is disposed between the bus bar and the case, and is fixed to the case via the bus bar from the outer surface side of the bus bar.
Assembled battery. The terminal of the fuse part is in contact with the case and the bus bar and fixed in a state of being sandwiched between each.
The assembled battery according to claim 1. The terminal of the fuse portion is fixed to the case together with the bus bar by a fastening member.
The assembled battery according to claim 1 or 2. The case includes a bus bar restricting portion that restricts a position of the bus bar.
The assembled battery according to any one of claims 1 to 3. The bus bar restricting portion is configured by a rib protruding from the surface of the case.
The assembled battery according to claim 4. The case includes a recess that accommodates the terminal of the fuse portion.
The assembled battery according to any one of claims 1 to 5. The recess corresponds to the outer shape of the terminal of the fuse portion;
The assembled battery according to claim 6.