WO2016031864A1 - Gas exhaust pipe, electricity-storage device provided with gas exhaust pipe, and method for attaching gas exhaust pipe - Google Patents

Abstract

　A gas exhaust pipe for discharging gas generated from an electricity-storage device, wherein the gas exhaust pipe is provided with: an attachment part provided on one end side, and attached to a member for supporting the gas exhaust pipe; and a deformation section provided in a position separated from the attachment part by a prescribed distance; the gas exhaust pipe being configured such that when the attachment part is attached to the member for supporting the gas exhaust pipe, and the gas exhaust pipe is in a self-standing state of being caused to stand independently, the self-standing state is maintained by the rigidity of the gas exhaust pipe itself, and when the gas exhaust pipe is deformed by being bent in the deformation section, and assumes a reclining state in which the gas exhaust pipe reclines, the reclining state is maintained by the weight of the gas exhaust pipe itself.

Description

Gas exhaust pipe, power storage device with gas exhaust pipe, and method of attaching gas exhaust pipe

The present invention relates to a gas discharge pipe, a power storage device with a gas discharge pipe, and a method for mounting the gas discharge pipe.

A vehicle such as an electric car or a hybrid car is equipped with a power storage device as a power source. The power storage device accommodates a power storage module including a plurality of power storage elements such as lithium ion secondary batteries (see Patent Document 1).

In Patent Document 1, when gas is released from at least one unit cell (storage element) of a battery block (storage module), gas is supplied to the outside of the module casing through a gas discharge pipe connected to a gas discharge port. The structure to be discharged is described.

Japanese Unexamined Patent Publication No. 2013-235827

By the way, when the power storage device is accommodated in a narrow storage space such as a center console, or when there are restrictions on the shape, mounting orientation, mounting location, etc. of the power storage device, a gas discharge pipe is previously connected to the gas outlet of the power storage device. It may not be installed. In this case, one end of the gas discharge pipe is attached to the vehicle body structure in advance, and after the power storage device is attached to the vehicle body structure, the other end of the gas discharge pipe is attached to the gas discharge port of the power storage device.

However, before the power storage device is attached to the vehicle body structure, for example, when the gas discharge pipe is attached to the vehicle body structure so that the gas discharge pipe extends in a substantially vertical direction, the power storage device is set to the attachment position. At the time of arrangement, the gas discharge pipe may hinder the installation work of the power storage device, such as the gas discharge pipe underlaying the power storage device.

According to the first aspect of the present invention, the gas discharge pipe is a gas discharge pipe for discharging the gas generated from the power storage device, and is provided on one end side and attached to a member that supports the gas discharge pipe; A deformation portion provided at a position away from the attachment portion by a predetermined distance, and the attachment portion is attached to a member that supports the gas discharge pipe, and in a self-supporting state where the gas discharge pipe is self-supporting. The gas discharge pipe itself is maintained in a self-supporting state, and is bent and deformed at the deformed portion, and in the collapsed state where the gas discharge pipe is laid down, the fall state is maintained by the weight of the gas discharge pipe.
According to the second aspect of the present invention, the method for attaching the gas exhaust pipe is a method for attaching the gas exhaust pipe for discharging the gas generated from the power storage device to the power storage device, provided on one end side of the gas exhaust pipe. Attach the mounting part to a member that supports the gas exhaust pipe, and bend the deformed part provided at a predetermined distance from the mounting part so that the other end of the gas exhaust pipe is away from the mounting position of the power storage device. The deformed state is maintained so that the deformed part is located on the top by the dead weight of the gas discharge pipe, the power storage device is placed and fixed at the mounting position, and the deformed part is returned to the state before bending deformation. Thus, the self-supporting state in which the other end of the gas exhaust pipe is located at the top is maintained by the rigidity of the gas exhaust pipe itself, and the other end of the gas exhaust pipe is attached to the gas outlet of the power storage device.

According to the present invention, the mounting workability of the power storage device can be improved.

1 is an external perspective view of an embodiment of a power storage device according to the present invention. FIG. 2 is an exploded perspective view of the power storage device illustrated in FIG. 1. The perspective view of the electrical storage apparatus in the state from which the side cover, the top cover, the under cover, LBC, etc. were removed. (A) is the figure which looked at the electrical storage apparatus in the state from which the side cover was removed from the left side, (b) is a figure which shows typically each area in the electrical storage apparatus shown to (a). The perspective view of an electrical storage module. FIG. 6 is an exploded perspective view of the power storage module illustrated in FIG. 5. The perspective view which shows the electrical storage apparatus before the attachment to a vehicle body structure, and the gas exhaust pipe attached to the vehicle body structure. The perspective view of a gas exhaust pipe. The cross-sectional schematic diagram which shows a lower end side attaching part. The figure which looked at the upper end side attaching part from the front. The figure which shows the gas exhaust pipe of a self-supporting state. The perspective view which shows the gas exhaust pipe of a lying state. The flowchart for demonstrating the method to attach an electrical storage apparatus to a vehicle body structure, and the method to attach a gas exhaust pipe to a vehicle body structure and an electrical storage apparatus. The perspective view which shows the gas exhaust pipe and electrical storage apparatus which concern on a modification. The perspective view which shows the gas exhaust pipe which concerns on a modification.

An embodiment of a power storage device according to the present invention will be described with reference to the drawings. The power storage device according to the present embodiment is applied to an in-vehicle power supply device in an electric motor drive system of an electric vehicle (for example, an electric vehicle). The concept of the electric vehicle includes a hybrid electric vehicle provided with an engine that is an internal combustion engine and an electric motor as drive sources of the vehicle, and a genuine electric vehicle that uses the electric motor as the only drive source of the vehicle.

FIG. 1 is an external perspective view of an embodiment of a power storage device according to the present invention, and FIG. 2 is an exploded perspective view of the power storage device illustrated in FIG. In the following description, the front-rear direction, the left-right direction, and the up-down direction will be described as directions shown in FIGS. Each direction illustrated in FIG. 1 and FIG. 2 corresponds to the front-rear direction, the left-right direction, and the up-down direction in a vehicle on which the power storage device 100 is mounted.

The power storage device 100 is, for example, a lithium ion battery device, and includes a plurality of secondary batteries 101 (see FIG. 6) such as lithium ion batteries as power storage elements in a power storage case 2 that is a housing of the power storage device 100. A plurality of power storage modules are accommodated. The electricity storage case 2 has a shape in which a small rectangular parallelepiped is connected to the front side of a large rectangular parallelepiped.

As shown in FIG. 2, the electricity storage case 2 includes a main case 11, a side cover 12, an under cover 13, and a top cover 14. The main case 11, the side cover 12, the under cover 13, and the top cover 14 are each formed, for example, by pressing a thin metal plate. The main case 11 is a member that has a frame shape in which an upper part, a lower part, and a left part are opened.

The side cover 12 is a member arranged to face the right wall 11a of the main case 11, constitutes the left wall of the main case 11, and closes the left opening of the main case 11. The under cover 13 is a member that closes the lower opening of the main case 11, and the top cover 14 is a member that closes the upper opening of the main case 11. Each of the side cover 12, the under cover 13, and the top cover 14 is fixed to the main case 11 with a fastening member such as a bolt, and forms a space for accommodating an electronic component therein.

FIG. 3 is a perspective view of power storage device 100 with side cover 12, top cover 14, under cover 13, LBC 4 and the like removed. 4A is a view of the power storage device 100 with the side cover 12 removed, as viewed from the left side, and FIG. 4B is a broken line showing each area in the power storage device 100 shown in FIG. 4A. It is a figure shown typically.

As shown in FIGS. 3 and 4, in the electricity storage case 2, the electricity storage module accommodation area 2 </ b> A in which the electricity storage modules 40 </ b> A, 40 </ b> B, 40 </ b> C are accommodated, the control unit accommodation area 2 </ b> B in which the junction box 3 is accommodated, A wiring aggregation area 2C in which harnesses, voltage detection lines, temperature sensor lines and the like are aggregated is formed.

A plurality (three in this embodiment) of power storage modules 40A, 40B, and 40C (hereinafter collectively referred to as the power storage module 40) are arranged in the power storage module accommodation area 2A. Each power storage module 40A, 40B, 40C is connected in series by a harness.

Each of the power storage modules 40A to 40C has a rectangular parallelepiped block shape, and its longitudinal direction extends in the vertical direction in the main case 11, and is arranged in parallel and adjacent to each other in the front-rear direction. The power storage modules 40A to 40C are arranged in the order of the power storage modules 40A, 40B, and 40C in the direction away from the control unit accommodation area 2B, that is, rearward. As shown in FIGS. 1 and 2, the power storage module 40 is fixed to the main case 11 with the side cover 12 and through bolts 81. The side cover 12 is provided with a through hole through which the through bolt 81 is inserted, and a back nut (not shown) fastened to the through bolt 81 is welded to the right side surface of the right wall 11a of the main case 11. Yes.

As shown in FIGS. 3 and 4, an SD (service disconnect) switch 53 is disposed on the upper surface of the rear portion of the main case 11. The SD switch 53 is a safety device provided to ensure safety during maintenance and inspection of the power storage device 100. The SD switch 53 includes an electric circuit in which a switch and a fuse are electrically connected in series. It is operated during maintenance and inspection. In the present embodiment, SD switch 53 is connected to each of the negative terminal of power storage module 40B and the positive terminal of power storage module 40C, and electrically connects or disconnects between power storage module 40B and power storage module 40C.

The junction box 3 disposed in the control unit accommodation area 2B is a control circuit having a precharge function that suppresses inrush current to the capacitor in the inverter at the time of charge / discharge current measurement, signal output, and vehicle start-up. The positive terminal of junction box 3 and the positive terminal of power storage module 40A, and the negative terminal of junction box 3 and the negative terminal of power storage module 40C are connected by a harness.

A lithium ion battery controller (LBC) 4 is disposed above the control unit accommodation area 2B (not shown in FIG. 3). The LBC 4 is a control circuit for measuring, monitoring, and controlling the voltage, current, temperature, charge / discharge, etc. of the power storage module 40 and each secondary battery (unit cell), and is covered with the LBC cover 15. Each power storage module 40 is provided with a voltage detection board, a temperature sensor, and the like. The LBC 4 is connected to the voltage detection board of each power storage module 40 by a voltage detection line, and is connected to the temperature detection sensor by a temperature sensor line.

In the wiring aggregation area 2C, a harness drawn from the positive terminal of the power storage module 40A, a voltage detection line drawn from the voltage detection board of each power storage module 40A, 40B, 40C, and a temperature sensor of each power storage module 40A, 40B, 40C The temperature sensor wires and the like drawn from are gathered.

A partition plate 20 is disposed at the boundary between the storage module storage area 2A and the control unit storage area 2B, or at the boundary between the wiring aggregation area 2C and the control unit storage area 2B. The front of the partition plate 20 is a control unit accommodation area 2B, and the rear of the partition plate 20 is an area (hereinafter referred to as a sealed space portion 2D) in which the power storage module accommodation area 2A and the wiring aggregation area 2C communicate with each other. The harness, voltage detection line, temperature sensor line, and the like collected in the wiring collection area 2C penetrate the partition plate 20 and are guided to the control unit accommodation area 2B. In addition, the clearance gap between each of a harness, a voltage detection line, a temperature sensor line, etc. and the through-hole of the partition plate 20 is sealed.

The sealed space 2D is a space sealed by the electricity storage case 2. A gap between members constituting the electricity storage case 2 is sealed with an adhesive, packing, or the like. As shown in FIGS. 1 and 2, the side cover 12 covering the left opening of the wiring aggregation area 2C is provided with a circular gas discharge port 12g.

5 is a perspective view of the power storage module 40A (40), and FIG. 6 is an exploded perspective view of the power storage module 40A (40) illustrated in FIG. The power storage modules 40A, 40B, and 40C are different in the number and details of the secondary battery 101, but have almost the same configuration. Therefore, the power storage module 40A will be described below as a representative. The power storage module 40A and the power storage module 40B have a configuration including 14 secondary batteries 101, and the power storage module 40C has a configuration including 12 secondary batteries 101.

As shown in FIG. 5, the power storage module 40A is provided with a positive terminal 41 and a negative terminal 42 at both ends in the longitudinal (up and down) direction. The power storage module 40 is provided with bosses 43 extending in the left-right direction at each of the four corners of the front upper portion, the front lower portion, the rear upper portion, and the rear lower portion.

The power storage module 40 has a substantially rectangular parallelepiped shape, and has a configuration in which a plurality of secondary batteries (unit cells) 101 are held by a holding case 111. In the present embodiment, the secondary batteries 101 are arranged in three stages on the left and right. Yes. The holding case 111 has a hexahedral shape.

In the power storage module 40A, 14 secondary batteries 101 are arranged. The positive electrode and the negative electrode of each secondary battery 101 are connected to the negative electrode and the positive electrode of opposite polarity of the adjacent secondary battery 101 by the conductive member 191, and all 14 are connected in series. Out of the plurality of secondary batteries 101 connected in series, the first secondary battery 101 and the last secondary battery 101 are connected to the external lead terminal 192 and connected to the positive terminal 41 and the negative terminal 42, respectively. Yes.

As shown in FIG. 6, the secondary battery 101 is a cylindrical lithium ion secondary battery in which components such as a battery element and a safety valve are housed in a cylindrical battery container into which an electrolyte is injected. It is configured. A safety valve, which is a gas discharge mechanism on the positive electrode side, is a cleavage valve that cleaves when the internal pressure of the battery container reaches a predetermined pressure due to an abnormality such as overcharging. The safety valve functions as a fuse mechanism that cuts off the electrical connection between the battery lid and the positive electrode side of the battery element when it is cleaved, and the gas generated inside the battery container, that is, the mist-like carbon-based gas containing the electrolyte is removed. It functions as a decompression mechanism that ejects the battery container to the outside.

The battery container is provided with a cleavage groove which is a gas discharge mechanism on the negative electrode side on the negative electrode side, and is cleaved when the internal pressure of the battery container becomes a predetermined pressure due to an abnormality such as overcharge. Thereby, the gas generated inside the battery container can be ejected also from the negative electrode terminal side. The secondary battery 101 has a nominal output voltage of 3.0 to 4.2 volts and an average nominal output voltage of 3.6 volts.

The plurality of secondary batteries 101 are arranged in the holding case 111 so that the central axis extends in front of and behind the holding case 111. The power storage module 40A has a configuration in which the element array 103 is stacked in N stages (N = 3 in the present embodiment) in the holding case 111. Each element array includes a plurality of secondary batteries 101 arranged in a line in the vertical direction. In the present embodiment, they are arranged in a plurality of × N stages (in this embodiment, five, four, and five three stages).

An element array on the left end side (hereinafter referred to as a left end element array 103L) includes five secondary batteries 101 arranged in a line in the vertical direction. The element array on the right end side (hereinafter referred to as right end element array 103R) is formed by arranging five secondary batteries 101 in a line in the vertical direction. An element array (hereinafter referred to as an intermediate element array 103M) between the left end element array 103L and the right end element array 103R is configured by four secondary batteries 101 arranged in a line in the vertical direction. In the present embodiment, the left end element array 103L and the right end element array 103R are held in the same array. On the other hand, the intermediate element array 103M has half the length of the secondary batteries 101 in the longitudinal (vertical) direction of the holding case 111, that is, in the column direction with respect to the left end element array 103L and the right end element array 103R. It is held in a state of being shifted by only.

In other words, the arrangement pitch of the left end element array 103L, the arrangement pitch of the right end element array 103R, and the arrangement pitch of the intermediate element array 103M are set to be the same, and the adjacent element arrays 103 are half pitch. They are misaligned. In this way, by holding the element arrays 103 adjacent in the column direction (left and right direction) orthogonal to the column direction (vertical direction) while being displaced in the column direction, the element arrays of adjacent stages are held. 103 can be brought close to each other, and the dimension in the step direction (left-right direction) can be shortened. Therefore, the length in the left-right direction of the power storage module 40A, that is, the left-right width dimension of the power storage module 40A can be reduced.

The holding case 111 includes four holding frame members divided in the left-right direction, that is, a right end holding frame member 121, a first intermediate holding frame member 131A, a second intermediate holding frame member 131B, and a left end holding frame member 141.

Each secondary battery 101 constituting the right end element array 103R is sandwiched between the right end holding frame member 121 and the first intermediate holding frame member 131A. Each secondary battery 101 constituting the intermediate element array 103M is sandwiched between the first intermediate holding frame member 131A and the second intermediate holding frame member 131B. The secondary batteries 101 constituting the left end element array 103L are sandwiched between the second intermediate holding frame member 131B and the left end holding frame member 141.

The left end portion 142 of the left end portion holding frame member 141 constituting the left side surface of the holding case 111 is formed with a rectangular refrigerant inlet 116 that is long in the vertical direction, and the right end portion holding frame member constituting the right side surface of the holding case 111. A rectangular refrigerant outlet 118 that is long in the vertical direction is formed on the right side surface 122 of 121.

Each secondary battery 101 arranged in the holding case 111 is held in a state where a gap is provided between the secondary batteries 101 adjacent in the column direction and between the secondary batteries 101 adjacent in the column direction. As a result, the cooling structure in which the refrigerant such as air introduced from the refrigerant introduction port 116 is led out from the refrigerant outlet port 118 through the gap between the secondary batteries 101 while cooling by contacting each secondary battery 101. It is configured.

The four holding frame members 121, 131A, 131B, 141 of the holding case 111 are provided with bosses 43 extending in the left-right direction at the four corners, and the bosses 43 are provided with through holes penetrating in the left-right direction. Yes. A metal cylindrical collar is provided in the through hole of the boss 43. A through bolt 81 (see FIG. 2) is passed through the through hole of the boss 43.

As shown in FIG. 2, the through bolt 81 is inserted through the through hole of the side cover 12, passes through the through hole of the boss 43 of the holding case 111, and is a back nut (not shown) of the right wall 11 a of the main case 11. ). Accordingly, the power storage module 40 </ b> A is sandwiched between the right wall 11 a of the main case 11 and the side cover 12 and is fixed to the main case 11 together with the side cover 12. At this time, the power storage module 40A is fixed in a suspended state in the power storage module accommodation area 2A by the through bolt 81, and the main case 11, the power storage module 40, and the side cover 12 are connected by the through bolt 81 in the axial direction of the through bolt 81, That is, they are fixed to each other by receiving a compressive force in the left-right direction.

FIG. 7 is a perspective view showing the power storage device 100 before being attached to the vehicle body structure 180 and the gas discharge pipe 150 attached to the vehicle body structure 180. FIG. Note that the vehicle body structure 180 schematically shown in FIG. 7 is a member constituting a skeleton (frame) of the vehicle. FIG. 8A is a perspective view of the gas exhaust pipe 150, and FIG. 8B is a perspective view of the gas exhaust pipe 150 of FIG. 8A viewed from another direction.

Among the plurality of secondary batteries 101 in the power storage device 100, the safety valve on the positive terminal side or the cleavage groove on the negative terminal side of at least one secondary battery 101 is opened, and the sealed space 2D (see FIG. 4B). When the gas is discharged into the battery, the released gas is discharged to the outside of the electricity storage case 2 through the gas discharge port 12g. A gas discharge pipe 150 is attached to the gas discharge port 12g, and the gas discharged from the gas discharge port 12g is guided to a predetermined position in the vehicle through the gas discharge passage in the gas discharge pipe 150. The gas guided to a predetermined position in the vehicle is discharged outside the vehicle through a gas discharge duct (not shown) of the vehicle body structure 180.

As shown in FIG. 7, the gas exhaust pipe 150 is attached in a state of standing on the attachment plate 181 of the vehicle body structure 180 and supported by the vehicle body structure 180. The mounting plate 181 is a flat metal plate. As shown in FIG. 8, the gas discharge pipe 150 is a flow path forming body having a circular gas discharge flow path inside, and is a pipe having an inner diameter Di formed in a substantially cylindrical shape. The material of the gas exhaust pipe 150 is chloroprene rubber (CR).

As shown in FIG. 8, the gas exhaust pipe 150 includes a lower end side attaching portion 151 provided on the lower end side, a linear cylindrical portion 152 extending upward (substantially in the vertical direction) from the lower end side attaching portion 151, and a straight line A deformable portion 153 provided at the upper end of the cylindrical portion 152, a curved cylindrical portion 154 curved from the deformable portion 153 toward the front upper side, a weight portion 155 provided at the upper end of the curved cylindrical portion 154, and a weight And an upper end side mounting portion 156 provided on the right side of the portion 155. Each of the linear cylindrical portion 152 and the curved cylindrical portion 154 has an outer diameter Do1.

The gas discharge channel is provided from the opening of the lower end side mounting portion 151 to the opening of the upper end side mounting portion 156. The lower end side attachment portion 151 is a portion attached to the vehicle body structure 180.

FIG. 9 is a schematic cross-sectional view showing the lower end side attachment portion 151. 9A shows a state before the lower end side attachment portion 151 is attached to the vehicle body structure 180, and FIG. 9B shows a state after the lower end side attachment portion 151 is attached to the vehicle body structure 180. Is shown. The lower end side attachment portion 151 has an annular flange 151a and an annular engagement protrusion 151b.

The flange 151a and the engagement protrusion 151b are provided so as to protrude radially outward from the linear cylindrical portion 152 so as to have a diameter larger than the outer diameter Do1 of the linear cylindrical portion 152. The flange 151a and the engagement protrusion 151b are separated from each other by substantially the same dimension as the thickness of the mounting plate 181 of the vehicle body structure 180, and a groove 151c is formed between the flange 151a and the engagement protrusion 151b. In addition, the engagement protrusion 151b arrange | positioned under the flange 151a is made into the taper shape from which an outer diameter becomes large gradually toward upper direction from a lower end side.

The mounting plate 181 of the vehicle body structure 180 is provided with a mounting hole 182 that is a circular through hole. The lower end side mounting portion 151 of the gas exhaust pipe 150 is inserted into the mounting hole 182 and the mounting hole 182 is inserted into the groove 151c. The gas discharge pipe 150 is attached to the vehicle body structure 180 by fitting the peripheral edge of the opening. As described above, the gas exhaust pipe 150 is attached so as to sandwich the opening peripheral edge portion of the attachment hole 182 between the flange 151 a and the engagement protrusion 151 b of the lower end side attachment portion 151, and is supported by the vehicle body structure 180.

As shown in FIG. 8A, the deforming portion 153 is located between the lower end side attaching portion 151 and the weight portion 155 and is spaced apart from the groove 151c of the lower end side attaching portion 151 by a predetermined distance X1. Is provided. The deformable portion 153 has a cylindrical shape, and has an outer diameter Do2 smaller than the outer diameter Do1 of the linear cylindrical portion 152 or the curved cylindrical portion 154 (Do1> Do2). Since the inner diameter of the deformable portion 153 is the same as the inner diameter Di of the linear cylindrical portion 152 or the curved cylindrical portion 154, the thickness t2 of the deformable portion 153 is the thickness of the linear cylindrical portion 152 or the curved cylindrical portion 154. Thinner than t1 (t1> t2).

The deformable portion 153 has a smaller section modulus and a second moment in a cross section perpendicular to the gas flow direction in the gas discharge pipe 150 and a lower bending rigidity than the straight cylindrical portion 152 and the curved cylindrical portion 154. That is, it is a portion that is easily bent and deformed.

The curved cylindrical portion 154 functions as a connecting portion that connects the weight portion 155 and the deformable portion 153. Since the curved cylindrical portion 154 is curved forward and upward, the position of the center of gravity G1 of the gas exhaust pipe 150 is located in front of the deformable portion 153 (see FIG. 11).

The weight part 155 is formed so that the mass per unit length is larger than that of the linear cylindrical part 152 and the curved cylindrical part 154. In the present embodiment, the average thickness of the weight portion 155 is set to t3 that is thicker than the thickness t1 of the linear cylindrical portion 152 or the curved cylindrical portion 154 (t3> t1> t2). The weight portion 155 has curved upper and lower side surfaces and flat left and right side surfaces.

FIG. 10 is a view of the upper end side mounting portion 156 as viewed from the front. The upper end side mounting portion 156 has an annular flange 156a and an annular engagement protrusion 156b. The upper end side attaching portion 156 and the right side surface of the weight portion 155 are connected by a connecting cylinder portion 156d. The flange 156a and the engagement protrusion 156b are separated from each other by substantially the same thickness as the thickness of the side cover 12 of the power storage device 100, and a groove 156c is formed between the flange 156a and the engagement protrusion 156b. The outer diameter of the bottom of the groove 156c is smaller than the outer diameter of the flange 156a and the engaging protrusion 156b. Note that the engagement protrusion 156b disposed on the right side of the flange 156a has a tapered shape in which the outer diameter gradually increases from the right end side toward the left side.

The upper end side mounting portion 156 of the gas exhaust pipe 150 is inserted into the gas exhaust outlet 12g of the side cover 12, and the opening peripheral edge of the gas exhaust outlet 12g is fitted into the groove 156c. Attached to. The gas exhaust pipe 150 is attached so that the opening peripheral edge portion of the gas exhaust port 12g is sandwiched between the flange 156a of the upper end side attaching portion 156 and the engaging projection 156b.

As shown in FIG. 7, the gas exhaust pipe 150 is self-supporting while being attached to the vehicle body structure 180. FIG. 11 is a view showing the gas discharge pipe 150 in a self-supporting state, and is a view of the gas discharge pipe 150 as viewed from the right side. The moment M of the force to bend and deform at the deforming portion 153 so that the curved cylindrical portion 154 and the weight portion 155 rotate around the deforming portion 153 by the dead weight of the gas exhaust pipe 150 is from the deforming portion 153. This is the product of the force F obtained by multiplying the mass up to the upper end of the gas exhaust pipe 150 by gravitational acceleration and the length Y1 of the moment arm. Here, the moment arm is a perpendicular line connecting the deformed portion 153 serving as the rotation center and the line of action of the force F acting on the center of gravity G1. The moment arm length Y1 is a distance from the center point O1 of the deformable portion 153 to the center of gravity G1.

In the present embodiment, the lower end side attachment portion 151 is attached to the vehicle body structure 180 that supports the gas exhaust pipe 150, and the upper end of the gas exhaust pipe 150 (that is, the gas attached to the vehicle body structure 180). In the self-supporting state in which the exhaust pipe 150 is free-standing so that the free end of the exhaust pipe 150 is positioned at the top, the self-supporting state is maintained by the rigidity of the gas exhaust pipe itself.

Whether or not the gas exhaust pipe 150 is bent and deformed by the deformation portion 153 due to its own weight, that is, whether or not the gas exhaust pipe 150 can maintain a self-supporting state due to the rigidity of the gas exhaust pipe itself is determined by the material of the gas exhaust pipe 150 and the outer diameter of the gas exhaust pipe 150. And the inner diameter, the mass from the deformed portion 153 to the end (upper end) of the gas discharge pipe 150 on the weight portion side, the position of the center of gravity G1 of the gas discharge pipe 150, and the like. In the present embodiment, the position of the deformable portion 153, the outer diameter Do2 of the deformable portion 153, and the mass of the weight portion 155 are adjusted so that the self-supporting state can be maintained. Since the bending stress acting on the deformed portion 153 is smaller than the allowable bending stress, the gas exhaust pipe 150 in the self-standing state does not fall down as described later unless an external force is applied.

FIG. 12 is a perspective view showing the gas discharge pipe 150 in a lying state. In FIG. 12, the mounting plate 181 of the vehicle body structure 180 is not shown. When an external force is applied to the vicinity of the weight side end (upper end) of the gas exhaust pipe 150 in a self-supporting state with fingers or the like, and the gas exhaust pipe 150 is bent and deformed by the deforming portion 153, the deformation is performed as shown in FIG. The section 153 is laid down so that it is positioned at the top (uppermost portion) of the gas discharge pipe 150, and the lying state is maintained by the weight of the gas discharge pipe 150 even after the external force is released. In the lying state, the linear cylindrical portion 152 is tilted so that the portion from the deformable portion 153 to the weight portion side end portion (free end) is folded while maintaining the self-standing state so as to extend in the vertical direction, The weight part side end is located below the deformation part 153.

Note that the product of the force F acting on the center of gravity G1 of the gas exhaust pipe 150 and the moment arm length Y1 such that the bending rigidity of the deforming portion 153 is high or the mass from the deforming portion 153 to the end on the weight portion side is light. When the elastic restoring force of the deforming portion 153 wins against the moment M of a certain force, the gas discharge pipe 150 in the fallen state returns to the original self-standing state (see FIG. 11).

On the other hand, in the present embodiment, the lying state is maintained by the dead weight of the gas exhaust pipe 150, and in the lying state, a moment M of force that overcomes the elastic restoring force of the deformable portion 153 is generated. is doing. The moment arm length Y1 is larger in the lying state than in the self-supporting state.

Whether or not the gas discharge pipe 150 returns to a self-supporting state due to the elastic force of the deforming portion 153 when the external force is released after applying the external force to fall down, depending on the weight of the gas discharge pipe 150. Whether or not the collapsed state is maintained depends on the material of the gas exhaust pipe 150, the outer diameter and the inner diameter of the gas exhaust pipe 150, the mass from the deformed portion 153 to the end (free end) on the weight portion side of the gas exhaust pipe 150, In addition, it is determined by the position of the center of gravity G1 of the gas discharge pipe 150 and the like. In the present embodiment, the lying state can be maintained by adjusting the position of the deformable portion 153, the outer diameter Do2 of the deformable portion 153, and the mass of the weight portion 155.

As described above, in the present embodiment, the position of the deformable portion 153 and the deformation of the deformable portion 153 so that the self-supporting state can be maintained by the rigidity of the gas exhaust pipe 150 itself and can be maintained by the dead weight of the gas exhaust pipe 150. The outer diameter Do2 of the part 153 and the mass of the weight part 155 are determined.

The attachment method of the electrical storage apparatus 100 and the gas exhaust pipe 150 is demonstrated. FIG. 13 is a flowchart for explaining a method of attaching power storage device 100 to vehicle body structure 180 and a method of attaching gas exhaust pipe 150 to vehicle body structure 180 and power storage device 100. As shown in FIG. 13, the method of attaching the power storage device 100 and the gas exhaust pipe 150 includes the preparation step S100, the tube-vehicle body mounting step S110, the tube overturning step S120, the power storage device-vehicle body mounting step S130, Step S140 and tube-power storage device attachment step S150 are included. By performing in order from step S100 to step S150, attachment of the power storage device 100 and the gas exhaust pipe 150 to the vehicle body is completed.

-Preparation process S100-
In the preparation step S100, the power storage device 100, the gas exhaust pipe 150, the mounting tool, and fastening parts such as bolts and nuts are prepared.

-Tube-Body mounting process S110-
In the tube-vehicle body attaching step S110, as shown in FIG. 7, the lower end side attaching portion 151 provided on one end side of the gas exhaust pipe 150 is attached to the vehicle body structure 180 that supports the gas exhaust pipe 150. Since the gas exhaust pipe 150 is made of chloroprene rubber, the engagement protrusion 151b is pushed radially inward by pushing the engagement protrusion 151b into the attachment hole 182 provided in the attachment plate 181 of the metal vehicle body structure 180. And can be inserted into the mounting hole 182 (see FIG. 9).

As shown in FIG. 9 (b), the opening peripheral portion of the mounting hole 182 of the mounting plate 181 is fitted into the groove 151c of the lower mounting portion 151, whereby the mounting operation of the gas exhaust pipe 150 to the vehicle body structure 180 is completed. The gas discharge pipe 150 is supported by the vehicle body structure 180. In addition, since the engagement protrusion 151b is tapered so that the outer diameter gradually increases upward from the lower end side, the insertability into the mounting hole 182 is good. When the lower end side attachment portion 151 is attached to the vehicle body structure 180, the gas exhaust pipe 150 maintains a self-supporting state.

-Tube lodging process S120-
If the power storage device 100 is attached to the vehicle body structure 180 while the gas exhaust pipe 150 is in a self-supporting state, the gas exhaust pipe 150 becomes an underlay of the power storage device 100. For example, the gas exhaust pipe 150 is attached to the power storage device 100. There is a risk of hindrance.

Therefore, in the present embodiment, in the tube collapse step S120 shown in FIG. 13, an external force is applied so as to fold the gas discharge pipe 150 with fingers or the like as shown by an arrow W1 in FIG. (That is, the weight side end that is the free end of the gas exhaust pipe 150 attached to the vehicle body structure 180) from the attachment position of the power storage device 100 (see the mounting surface 189 of the power storage device 100 in the figure). The deforming portion 153 is bent and deformed to the left so as to be kept away.

The gas exhaust pipe 150 bent and deformed by the deforming part 153 is brought into a lying state such that the deforming part 153 is located at the top (uppermost part) of the gas exhaust pipe 150. In FIG. 7, the mounting surface 189 of the power storage device 100 with respect to the vehicle body structure 180 is schematically shown by a two-dot chain line. Once the gas exhaust pipe 150 is brought into a fallen state, the fallen state is maintained by its own weight. That is, it is not necessary to keep applying external force by pressing the gas discharge pipe 150 with fingers or the like.

-Power storage device-Body mounting step S130-
In the power storage device-vehicle body mounting step S130 shown in FIG. 13, the power storage device 100 is disposed on the mounting surface 189 which is the mounting position, and the mounting piece 119 (see FIGS. 2 and 7) fixed to the under cover 13 is bolted, The power storage device 100 is mounted in a state of being mounted on the mounting surface 189 by being fastened to the vehicle body structure 180 by a fastening component such as a nut.

-Pipe standing process S140-
In the tube standing step S140, an external force is applied so as to lift up the upper end of the gas exhaust pipe 150 with fingers or the like, the deformed portion 153 is returned to the state before bending deformation, and the end on the weight portion side is the top (most) It is in a self-supporting state so that it is located in the upper part). Once the gas exhaust pipe 150 is in a self-supporting state, the self-supporting state is maintained by the rigidity of the gas exhaust pipe itself.

-Tube-Power storage device mounting step S150-
In the tube-power storage device mounting step S150, the upper end side mounting portion 156 provided in the weight portion 155 of the gas discharge tube 150 in the self-supporting state is mounted on the gas discharge port 12g which is the gas outlet portion of the power storage device 100. Since the gas discharge pipe 150 is made of chloroprene rubber, the engagement protrusion 156b is radially inward by pushing the engagement protrusion 156b of the upper end side mounting portion 156 into the gas discharge port 12g provided in the metal side cover 12. And can be inserted into the gas outlet 12g.

The gas discharge pipe 150 is attached to the power storage device 100 by fitting the opening peripheral edge of the gas discharge port 12g into the groove 156c of the upper end side mounting portion 156. Since the engagement protrusion 156b is tapered so that the outer diameter gradually increases from the right end side toward the left, the insertion into the gas discharge port 12g is good. When the upper end side attaching portion 156 is attached to the power storage device 100, the attaching operation of the gas discharge pipe 150 is completed, and the sealed space portion 2D (see FIG. 4B) of the power storage device 100 and the gas discharge of the vehicle body structure 180 are completed. A duct (not shown) communicates with the duct.

According to the embodiment described above, the following operational effects can be obtained.
The gas exhaust pipe 150 is a case where the lower end side attachment portion 151 is attached to the vehicle body structure 180, and in the self-supporting state in which the gas exhaust pipe 150 is self-supporting, the gas exhaust pipe 150 maintains a self-supporting state by the rigidity of the gas exhaust pipe itself, In addition, when the gas exhaust pipe 150 is bent and deformed by the deforming portion 153 and the gas exhaust pipe 150 is fallen down, the fall state is maintained by the weight of the gas exhaust pipe 150.

As a result, when the power storage device 100 is disposed at the mounting position (mounting surface 189) of the vehicle body structure 180, the gas exhaust pipe 150 attached in advance to the vehicle body structure 180 is brought into a fallen state, and this state is maintained. Thus, the workability of attaching the power storage device 100 to the vehicle body structure 180 can be improved.

Further, after the power storage device 100 is fixed at the mounting position, the gas discharge pipe 150 is erected to be in a self-supporting state, and this state is maintained, thereby improving the workability of attaching the gas discharge pipe 150 to the power storage device 100. Can be made.

According to this embodiment, when the power storage device 100 is housed in a narrow housing space such as a center console or the like, there are restrictions on the shape, mounting orientation, mounting location, etc. of the power storage device 100. Even when the gas discharge pipe 150 is attached to the vehicle body structure 180 in a self-standing state, the power storage device 100 and the gas discharge pipe 150 can be easily attached.

The following modifications are also within the scope of the present invention, and one or a plurality of modifications can be combined with the above-described embodiment.
(Modification 1)
In the above-described embodiment, the example in which the outer diameter of the deformable portion 153 is made smaller than the outer diameter of the linear cylindrical portion 152 or the curved cylindrical portion 154 has been described, but the present invention is not limited to this. In order to make the bending rigidity of the deformable portion 153 smaller than that of the linear cylindrical portion 152 or the curved cylindrical portion 154, the inner diameter of the deformable portion 153 is made larger than the inner diameter of the linear cylindrical portion 152 or the curved cylindrical portion 154. May be. In this case, the outer diameter of the deformable portion 153 can be the same as the outer diameter of the linear cylindrical portion 152 or the curved cylindrical portion 154. In addition, the gas exhaust pipe 150 is not limited to being formed in a cylindrical shape, and the bending rigidity may be reduced by making the cross-sectional shape of the deformable portion 153 different from other portions.

(Modification 2)
In the above-described embodiment, the deformed portion 153 has a smaller gas moment so that the cross-sectional secondary moment in the cross section perpendicular to the gas flow direction of the gas exhaust pipe 150 is smaller than the straight cylindrical portion 152 and the curved cylindrical portion 154. Although the example which formed the discharge pipe 150 was demonstrated, this invention is not limited to this. That is, it is not limited to the case where the bending rigidity is reduced by reducing the sectional moment of inertia of the deformable portion 153. For example, the material of the deformable portion 153 is the material of the linear cylindrical portion 152 or the curved cylindrical portion 154. The bending rigidity may be reduced by using different ones. In this case, the material of the deformable portion 153 is selected to be smaller than the elastic coefficient of the material of the linear cylindrical portion 152 or the curved cylindrical portion 154.

(Modification 3)
In the above-described embodiment, the example in which the bending rigidity of the deformable portion 153 is made smaller than the bending rigidity of the linear cylindrical portion 152 or the curved cylindrical portion 154 has been described, but the present invention is not limited to this. With reference to FIG. 14 and FIG. 15, the gas exhaust pipe 250 which concerns on a modification is demonstrated. 14 is a perspective view showing the power storage device 200 before being attached to the vehicle body structure 180 and the gas exhaust pipe 250 attached to the vehicle body structure 180, and FIG. 15 is a perspective view showing the gas exhaust pipe 250 in a self-supporting state. FIG.

In this modification, as shown in FIG. 14, the gas discharge pipe 250 is formed longer than the gas discharge pipe 150 of the above-described embodiment. Further, the position of the gas discharge port 212g provided in the power storage device 200 is provided at a position (upper position) higher than the gas discharge port 12g of the above-described embodiment.

As shown in FIG. 15, the gas discharge pipe 250 has a lower end side mounting portion 151, a linear cylindrical portion 252 extending upward from the lower end side mounting portion 151, and an upper end from the upper end of the linear cylindrical portion 252. A curved cylindrical portion 254 that is curved, a distal end cylindrical portion 255 extending linearly from the curved cylindrical portion 254, and an upper end side mounting portion 156 provided on the right side of the distal end cylindrical portion 255. . The linear cylindrical portion 252, the curved cylindrical portion 254, and the tip cylindrical portion 255 each have an outer diameter Do1.

In FIG. 15, as schematically shown by hatching, the deformed portion 253 is virtually set at a position away from the lower end side mounting portion 151 in the linear cylindrical portion 252 by a predetermined distance X2. In other words, the deforming portion 253 is a part of the linear cylindrical portion 252 and is not smaller in outer diameter than the surrounding cylindrical portion as in the above-described embodiment, and in terms of appearance, the surrounding portion There is no difference from the cylindrical part.

Furthermore, in this modification, the weight part 155 of the above-described embodiment is omitted by increasing the mass of the part from the deforming part 253 to the upper end of the gas exhaust pipe 250. In this modified example, the moment arm length Y2 which is the distance from the center point O2 of the deformable portion 253 to the center of gravity G2 is larger than the moment arm length Y1 of the above-described embodiment, compared to the above-described embodiment. Although short, the mass of the portion from the deformable portion 253 to the upper end of the gas exhaust pipe 250 is set larger than that of the above-described embodiment, and the moment M of the force is set to be substantially the same as that of the above-described embodiment. ing. That is, in this modification, a self-supporting state can be maintained by the rigidity of the gas exhaust pipe 250 itself.

Further, in the present modification, the position of the deformed portion 253 and the length from the deformed portion 253 to the upper end of the gas exhaust pipe 250, that is, from the deformed portion 253, so that the lying state can be maintained by the weight of the gas exhaust pipe 250. The mass of the portion up to the upper end of the gas exhaust pipe 250 is determined.

In this modified example, when an external force is applied so as to fold the gas discharge pipe 250 with a finger or the like, as shown by an arrow W2 in FIG. Is bent and deformed, and thereafter, the state of being laid down is maintained. Therefore, it is possible to prevent the gas exhaust pipe 250 from interfering with the mounting operation of the power storage device 200. According to such a modification, the same operational effects as those of the above-described embodiment can be obtained.

(Modification 4)
In the above-described embodiment, the example in which the average thickness of the weight portion 155 is formed thicker than the linear cylindrical portion 152 and the curved cylindrical portion 154 has been described, but the present invention is not limited to this. . For example, the thickness of the weight portion 155 is not changed, and another member may be fixed to the upper end of the gas exhaust pipe 150 to increase the mass of the portion from the deformable portion 153 to the upper end of the gas exhaust pipe 150.

(Modification 5)
In the above description, the three power storage modules 40A to 40C are provided and connected in series, but the present invention is not limited to this. For example, there may be only one or two power storage modules 40, or four or more. Moreover, you may comprise so that the some electrical storage module 40 may be connected in parallel.

(Modification 6)
The present invention is not limited to the number and the number of stages of the secondary batteries 101 mounted on the power storage modules 40A, 40B, and 40C, and the embodiment described above. For example, it can be 6 stages × 2 stages or 5 stages × 4 pieces × 3 stages.

(Modification 7)
In the above-described embodiment, the power storage device 100 including a plurality of columnar secondary batteries 101 has been described as an example. However, the present invention may be applied to a power storage device including a plurality of rectangular secondary batteries.

(Modification 8)
Although the lithium ion secondary battery has been described as an example of the storage element, the present invention can be applied to other secondary batteries such as a nickel metal hydride battery. Furthermore, the present invention can also be applied when an electric double layer capacitor or a lithium ion capacitor is used as a storage element.

(Modification 9)
In the above-described embodiment, an example in which the present invention is applied to an electric vehicle has been described, but the present invention is not limited to this. The present invention can also be applied to a power storage device constituting a power supply device for vehicles of other electric vehicles, for example, railway vehicles such as hybrid trains, passenger cars such as buses, trucks such as trucks, and industrial vehicles such as battery-type forklift trucks. .

As long as the characteristics of the present invention are not impaired, the present invention is not limited to the above-described embodiments, and other forms conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention. .

The disclosure of the following priority application is hereby incorporated by reference.
Japanese Patent Application No. 175589 (filed Aug. 29, 2014)

2 storage case, 2A storage module storage area, 2B control unit storage area, 2C wiring consolidation area, 2D sealed space, 3 junction box, 11 main case, 11a right wall, 12 side cover, 13 under cover, 14 top cover 15 LBC cover, 20 partition plate, 40 power storage module, 41 positive terminal, 42 negative terminal, 43 boss, 53 SD switch, 81 volts, 100 power storage device, 101 secondary battery, 103 element array, 111 holding case, 116 Refrigerant inlet, 118, refrigerant outlet, 119 mounting piece, 121 right end holding frame member, 122 right side, 131A first intermediate holding frame member, 131B second intermediate holding frame member, 141 left end holding frame member, 142 left side 150 Discharge pipe, 151 lower end side mounting portion, 151a flange, 151b engaging projection, 151c groove, 152 linear cylindrical portion, 153 deforming portion, 154 curved cylindrical portion, 155 weight portion, 156 upper end side mounting portion, 156a flange, 156b engaging protrusion, 156c groove, 156d connecting cylinder, 180 body structure, 181 mounting plate, 182 mounting hole, 189 mounting surface, 191 conductive member, 192 external lead terminal, 200 power storage device, 250 gas exhaust pipe, 252 Linear cylindrical part, 253 deformation part, 254 curved cylindrical part, 255 tip cylindrical part

Claims (6)

A gas discharge pipe for discharging gas generated from the power storage device,
An attachment portion provided on one end side and attached to a member supporting the gas discharge pipe;
A deformable portion provided at a position away from the mounting portion by a predetermined distance;
When the attachment portion is attached to a member that supports the gas discharge pipe,
In the self-supporting state where the gas exhaust pipe is self-supporting, the gas exhaust pipe itself maintains the self-supporting state by the rigidity of the gas exhaust pipe itself, and is bent and deformed by the deforming portion. A gas discharge pipe configured to maintain the above-mentioned lodging state by its own weight. The gas exhaust pipe according to claim 1, wherein
A weight portion is provided on the other end side of the gas discharge pipe,
The deformation portion is provided between the attachment portion and the weight portion,
The weight part has a larger mass per unit length than a connection part that connects the weight part and the deformation part,
The gas discharge pipe is formed so that the deformation portion has a bending rigidity smaller than that of the connection portion. The gas exhaust pipe according to claim 2,
The flow path shape in the gas discharge pipe is circular,
A gas discharge pipe in which an outer diameter of the deforming portion is formed smaller than an outer diameter of the connecting portion so that a secondary moment of section of the deforming portion is smaller than that of the connecting portion. The gas exhaust pipe according to claim 2 or 3,
The thickness of the said weight part is a gas exhaust pipe thicker than the thickness of the said connection part. A gas exhaust pipe according to any one of claims 1 to 3,
A plurality of power storage elements having a gas discharge mechanism, and a power storage device provided with an outlet for gas discharged from the gas discharge mechanism of the power storage element,
A power storage device with a gas exhaust pipe, wherein the other end of the gas exhaust pipe is attached to a gas outlet of the power storage device. A method of attaching a gas discharge pipe for discharging gas generated from a power storage device to the power storage device,
A mounting portion provided on one end side of the gas exhaust pipe is attached to a member that supports the gas exhaust pipe,
A deformed portion provided at a position away from the mounting portion by a predetermined distance is bent and deformed so that the other end of the gas discharge pipe is away from the mounting position of the power storage device, and the deforming portion is positioned at the top. To maintain the lying state that has fallen to the weight of the gas exhaust pipe,
The power storage device is arranged and fixed at the mounting position,
The deformed portion is returned to the state before bending deformation, and the self-supporting state in which the other end of the gas exhaust pipe is positioned at the top is maintained by the rigidity of the gas exhaust pipe itself,
A method for attaching a gas discharge pipe, wherein the other end of the gas discharge pipe is attached to a gas outlet of the power storage device.

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