JP5311915B2 - Battery pack for vehicle power supply - Google Patents

Description

  The present invention relates to an assembled battery used in a vehicle power supply device.

An assembled battery that requires a large output, such as a power supply device for a vehicle, has a large number of batteries connected in series to increase the output voltage. This is to increase the power supplied to the motor that drives the vehicle. In this assembled battery, batteries are stored in a plastic holder case in order to hold a large number of batteries in place. The holder case stores batteries arranged in a vertical and horizontal orientation in parallel to store a large number of batteries in multiple rows and columns. The holder case for storing a large number of batteries has a shape in which an opposing surface is opened and an insertion portion for inserting each battery is provided, and a large number of batteries are inserted into a single holder case and arranged at a fixed position. (See Patent Document 1)
JP 2004-171856 A

  An exploded perspective view of the assembled battery of Patent Document 1 is shown in FIG. In this assembled battery, an end plate 93 is fixed to the opposite surface of the holder case 92. The holder case 92 is provided with a battery storage portion 94 that can store a large number of cylindrical batteries 91 side by side at both ends. In the assembled battery of FIG. 1, the holder case 92 is divided into two in the longitudinal direction (vertical direction in the figure) of the cylindrical battery 91, and the holder case 92 is composed of an upper holder 92A and a lower holder 92B. In the holder case 92, the upper holder 92 </ b> A and the lower holder 92 </ b> B are connected to each other, and a large number of cylindrical batteries 91 are stored in the battery storage portion 94. The holder case 92 is formed by connecting the upper holder 92A and the lower holder 92B to each other in a state where the cylindrical battery 91 is inserted into the battery storage portions 94 of the upper holder 92A and the lower holder 92B. The upper holder 92A and the lower holder 92B are connected and fixed by a connecting member (not shown). The upper holder 92 </ b> A and the lower holder 92 </ b> B are provided with protruding ridges 95 through which the connecting members are inserted so as to protrude outside the ventilation wall.

  Further, the assembled battery connects a large number of cylindrical batteries 91 by connecting a metal plate bus bar 96 to the end face electrodes of the cylindrical battery 91 exposed from the openings on both sides of the holder case 92, and the holder case 92. The end plates 93 are fixed to both sides of the holder case 92, and both sides of the holder case 92 are closed by the end plates 93. The end plate 93 is fitted and positioned at the opening peripheral edge portions of both sides of the holder case 92, and the outer peripheral edge of the end plate 93 and the opening peripheral edge portion of the holder case 92 are ultrasonically welded and fixed.

  The battery pack shown in FIG. 1 houses the battery in a holder case designed exclusively for the vehicle, so the output voltage cannot be adjusted by changing the number of batteries connected in series. The required output voltage of the vehicle power supply device varies depending on the type of vehicle mounted. A power supply device mounted on a heavy vehicle or a vehicle that places importance on acceleration by a motor is required to increase the number of batteries connected in series to increase the output voltage. However, since the assembled battery of FIG. 1 needs to be designed exclusively for the vehicle on which it is mounted, there is a drawback that the output voltage cannot be changed by adjusting the number of batteries. Therefore, the manufacturing cost increases because the structure is optimal for each vehicle. This drawback can be solved as a structure in which the holder case is divided into a plurality of parts. However, when the holder case is divided into a plurality of parts, the overall mechanical strength is lowered.

  The present invention has been developed for the purpose of solving such drawbacks of a battery pack of a conventional vehicle power supply device. An important object of the present invention is to provide a vehicular power supply device that can freely change an output voltage to adjust to a required voltage of a vehicle to be mounted, and improve a mechanical strength in an assembled state to form a tough structure. It is to provide an assembled battery.

Means for Solving the Problems and Effects of the Invention

The assembled battery of the vehicle power supply device of the present invention has the following configuration in order to achieve the above-described object.
The assembled battery of the vehicle power supply apparatus includes holder cases 2 and 42 in which a plurality of batteries 1 are accommodated in a parallel posture and the end electrodes 5 of the batteries 1 are arranged on the opposing surfaces, and the holder cases 2 and 42 And an end plate 3 which is fixed to the opposite surface and is connected to the end electrode 5 of the battery 1 and has a bus bar 4 formed by connecting the batteries 1 in series or in parallel. The holder cases 2 and 42 and the end plate 3 are divided into a plurality of sub cases 2A and 42A and a sub end plate 3A so that the longitudinal direction is divided into a plurality of regions. In the assembled battery of the vehicle power supply device, each divided sub-end plate 3A is fixed to two adjacent sub-cases 2A and 42A, and adjacent sub-cases 2A, 42A is connected.

  The assembled battery of the vehicle power supply device with this structure can be adjusted to the required voltage optimum for the vehicle on which the output voltage can be freely changed, and in the assembled state, the mechanical strength is improved and the structure is strong. There are features that can be done. Because the above assembled battery divides the holder case into a plurality of sub cases and also divides the end plate into sub end plates, the number of sub cases and sub end plates to be connected is changed, This is because the number of batteries to be stored can be adjusted to an optimum number. In addition, since both the holder case and the end plate are divided into a plurality of parts, the sub-end plates are connected to the plurality of sub-cases, that is, the sub-end plates are connected so as to straddle the adjacent sub-cases. Adjacent sub-cases are connected by end plates, and divided sub-end plates are connected by sub-cases, and in the assembled state, the whole can be made into a strong assembled battery.

The assembled battery of the vehicle power supply device of the present invention can store the batteries 1 in a plurality of rows and a plurality of stages in the sub cases 2A and 42A.
This assembled battery can be assembled into a tough structure by connecting both side portions of the sub-end plate to the adjacent sub-case.

  The assembled battery of the vehicle power supply device according to the present invention includes a battery 1 housed in the subcases 2A and 42A, a single cylindrical battery, or a unit cell composed of a plurality of cylindrical batteries connected in series in a straight line. It can be set as the battery module which becomes.

In the assembled battery of the vehicle power supply device of the present invention, the pair of sub-end plates 3A fixed to the opposing surfaces of the sub-cases 2A and 42A are fixed to the sub-cases 2A and 42A via the connecting rod 8, and this connection Connecting holes 16 and 56 for inserting the rod 8 are provided in the sub cases 2A and 42A, the connecting rod 8 is inserted through the connecting holes 16 and 56, and the sub end plate 3A is connected to the sub cases 2A and 42A via the connecting rod 8. Can be fixed to.
In this assembled battery, the sub end plate can be firmly fixed to the sub case via the connecting rod.

The assembled battery of the vehicle power supply device of the present invention can be provided with a connecting hole 16 inserted through one connecting rod 8 in the axial direction in a sub case 2A disposed adjacent thereto.
In this assembled battery, since one connecting rod connects adjacent sub cases, the adjacent sub cases can be connected particularly firmly with the connecting rod.

In the assembled battery of the vehicle power supply device of the present invention, both ends of the bus bar 4 are connected to the end electrodes 5 of the adjacent sub cases 2A and 42A, and the adjacent sub cases 2A and 42A are connected by the bus bar 4. can do.
This assembled battery can firmly connect the adjacent sub cases via the bus bar.

  Embodiments of the present invention will be described below with reference to the drawings. However, the embodiment described below exemplifies the assembled battery of the vehicle power supply device for embodying the technical idea of the present invention, and the present invention does not specify the assembled battery of the vehicle power supply device below. .

  Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  The assembled battery of the vehicle power supply device shown in FIGS. 2 to 8 includes a holder case 2 in which a plurality of batteries 1 are accommodated in a parallel posture and the end electrodes 5 of the batteries 1 are arranged on the opposing surface, and this holder. And an end plate 3 fixed to the facing surface of the case 2. On the surface of the end plate 3, a bus bar 4 connected to the end electrode 5 of the battery 1 and connecting the battery 1 in series or in parallel is disposed.

  The holder case 2 and the end plate 3 are divided into a plurality of sub cases 2A and sub end plates 3A so that the longitudinal direction is divided into a plurality of regions. Each of the divided sub-end plates 3A is fixed to two sub-cases 2A arranged adjacent to each other, and the adjacent sub-cases 2A are connected by the sub-end plates 3A.

  In the illustrated assembled battery, two unit cells made of a cylindrical battery are linearly connected in series and accommodated in a subcase 2A as a battery module. 4 and FIG. 5, the battery module formed by connecting two unit cells in a straight line in series is housed in the holder case 2, but one battery module is housed in the holder case 2. It is also possible to use a unit cell, or three or more unit cells connected in a straight line in series. A plurality of batteries 1 made of battery modules are arranged in a plurality of rows and a plurality of stages in parallel postures and stored in a plastic sub case 2A. The battery 1 is a nickel metal hydride battery. However, instead of nickel metal hydride batteries, all batteries that can be charged, such as lithium ion batteries, can be used. Further, in the illustrated assembled battery, the battery 1 is a cylindrical battery, but the battery may be a square battery. Furthermore, the battery 1 housed in the subcase 2A is provided with end electrodes 5 that can connect the bus bars 4 to both ends.

  The sub case 2A is made of an insulating plastic, and houses the batteries 1 in two rows and three stages. The sub case 2A shown in FIGS. 6 and 8 has a plurality of rows of opposing walls 12 arranged in parallel to each other, a storage portion 13 for the battery 1 is provided between the opposing walls 12, and an opening between the opposing walls 12 is provided. The portion is closed by the ventilation wall 11. The ventilation wall 11 is provided with an inlet 18 and an outlet 19 for blowing a gas for cooling the battery 1 in the storage portion 13. In the illustrated subcase 2A, the batteries 1 are housed in two rows, so that three rows of opposing walls 12 are provided.

  The sub-case 2 </ b> A is provided with a cooling gap 10 between the facing wall 12 and the battery 1 for flowing air that cools the battery 1. The opposing wall 12 is provided with a protruding portion 14 that protrudes toward a valley between adjacent batteries 1. The protrusion 14 brings the inner surface of the opposing wall 12 closer to the surface of the battery 1 and narrows the cooling gap 10 between the battery 1 and the inner surface of the opposing wall 12. Further, in the sub case 2 </ b> A of FIG. 6, the protruding height of the protruding portion 14 protruding toward the valley of the battery 1 is higher in the lee than in the lee. The projecting portion 14B projecting high narrows the cooling gap 10 provided on the battery surface and increases the flow velocity. Therefore, the subcase 2A having this structure can cool the windward and leeward batteries 1 uniformly. This is because even if the temperature of a fluid such as air rises in the leeward, it is efficiently cooled at a high flow rate. In particular, by forming the leeward projecting portion 14 </ b> B into a shape along the surface of the battery 1, the battery 1 can be efficiently cooled by blowing air at a high speed over a wide area of the surface of the leeward battery 1.

  As shown in FIGS. 5 and 8, the sub case 2 </ b> A is provided with a connection hole 16 through which the connection rod 8 for fixing the sub end plate 3 </ b> A is inserted. The connecting hole 16 is open inside the connecting cylinder 15 provided in the protruding portion 14 of the facing wall 12. The connecting rod 8 is inserted into the connecting hole 16. The connecting rod 8 passes through the sub-end plate 3A and is inserted into the connecting hole 16 of the sub-case 2A to fix the sub-end plate 3A to the sub-case 2A. The sub case 2A fixes the sub end plate 3A to the opposing surface. Accordingly, the connecting rod 8 passes through the sub end plate 3A, the sub case 2A, and the sub end plate 3A, and is fixed so that the sub case 2A is sandwiched between the pair of sub end plates 3A.

  6 and 8 accommodates the battery 1 in three stages, so that two protruding portions 14A and 14B are provided on the opposing wall 12, and a connecting cylinder 15 is provided on the two protruding portions 14A and 14B. Yes. The opposing wall 12 in the figure is provided with protrusions 14A and 14B at the boundary between the batteries 1 arranged at the first and second stages and at the boundary between the batteries 1 arranged at the second and third stages. The connecting cylinder 15 is provided here. The windward projecting portion 14 </ b> A has a cylindrical shape, and a connection hole 16 through which the connection rod 8 is inserted is provided inside to form a connection cylinder 15. The leeward projecting portion 14B is larger than the leeward projecting portion 14A, and has a connecting cylinder 15 having a connecting hole 16 through which the connecting rod 8 is inserted, with the surface approaching the surface of the battery 1. Yes.

  The connecting cylinder 15 is provided so as to protrude outside the opposing wall 12 of the sub case 2A. 5 and FIG. 8, one connecting rod 8 is inserted through the connecting hole 16 of the adjacent subcase 2A, that is, two subcases 2A adjacent to each other by one connecting rod 8. Are connected. In order to insert one connecting rod 8 into the connecting holes 16 of the two sub cases 2A, the adjacent sub case 2A is connected to the connecting cylinder 15 provided with the connecting holes 16 with the shaft of the connecting rod 8. It is shifted in the direction. In FIG. 5, the connecting cylinder 15 of one sub case 2 </ b> A is provided in the upper half of the connecting rod 8, and the connecting cylinder 15 of the other sub case 2 </ b> A is provided in the lower half of the connecting rod 8.

  Further, in the sub case 2A shown in FIGS. 6 and 8, the connecting cylinders 15 provided on the upstream and downstream projecting portions 14A and 14B are provided on the opposite sides while being shifted in the axial direction of the connecting rod 8. The sub case 2A can firmly connect the adjacent sub cases 2A with the two connecting rods 8 inserted through the connecting cylinders 15 on the upstream side and the downstream side.

  However, in the battery pack, as shown in FIG. 9, one connecting rod 8 is inserted into the connecting hole 56 of one sub case 42A, and two adjacent sub cases 42A are connected to the sub end plate 3A. You can also. In this assembled battery, two connecting rods 8 are connected to the sub-end plate 3A, one connecting rod 8 is connected to the connecting hole 56 of one sub case 42A, and the other connecting rod 8 is connected to the other sub case 52A. And the adjacent sub case 42A is connected by the sub end plate 3A. In FIG. 9, reference numeral 42 denotes a holder case, and 55 denotes a connecting cylinder. Further, in FIG. 9, the same components as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  Further, as shown in FIGS. 6 and 8, the sub case 2 </ b> A is provided with an inflow port 18 and a discharge port 19 through which a fluid such as air for cooling the battery 1 passes. The inflow port 18 and the discharge port 19 are slit-shaped extending in the longitudinal direction of the battery 1 and blow air to the entire battery 1. The inflow port 18 is opened at both sides of each storage unit 13, and the discharge port 19 is opened at the center of the storage unit 13. In the sub case 2A, air flowing in from the inlets 18 provided on both sides of each storage portion 13 is blown to both sides of the battery 1 and blown from the top to the bottom in FIG. To the outside of the sub case 2A.

  The sub-end plate 3A shown in FIGS. 5 and 8 is made of an insulating plastic and is formed to have the same width as that of the sub-case 2A. The sub-end plate 3A is fixed to an adjacent sub-case 2A via a connecting rod 8 with the right half disposed in the right sub-case 2A and the left half disposed on the opposite surface of the left sub-case 2A in the figure. The two sub cases 2A are connected. The sub case 2A shown in the figure has a width that allows the batteries 1 to be stored in two rows. Therefore, the sub-end plate 3A has a width of the sub-case 2A that can store the batteries 1 in two rows. The vertical width orthogonal to the horizontal width of the sub-end plate 3A is the same as the vertical width of the sub case 2A.

  In the assembled battery shown in FIG. 7, end end plates 3B fixed to both end portions of the holder case 2 are formed in half of the lateral width of the sub case 2A. This end portion end plate 3B can also be formed integrally with a sub end plate 3A disposed adjacent thereto.

  The sub-end plate 3A of the assembled battery shown in FIGS. 4, 5, 7 and 8 has a bus bar 4 fixed to the outer surface. The sub-end plate 3A is provided with a fitting portion 22 on the outer surface for arranging the bus bar 4 fixed to the end electrode 5 of the battery 1 housed in the sub-case 2A at a fixed position. Further, the sub-end plate 3 </ b> A shown in the figure is provided by integrally forming the fitting rib 23 along the outer periphery of the fitting portion 22. Stopping holes 24 that fix the bus bar 4 to the end electrode 5 of the battery 1 are provided through both ends of the fitting portion 22. The stop hole 24 passes through the bus bar 4 and passes the set screw 28 through the end electrode 5 of the battery 1 to fix the bus bar 4 to the end electrode 5.

  Further, the sub-end plate 3A is provided with a connecting hole 26 through which the connecting rod 8 is inserted through the connecting hole 16 of the sub case 2A. The sub-end plate 3 </ b> A shown in the figure is provided on the outer periphery of the connection hole 26 by projecting to the surface and integrally forming the support rib 25. The support rib 25 is equal to the height of the fitting rib 23 or protrudes higher than the fitting rib 23, contacts the inner surface of the outer case 6 described later, and is fixed to the outer side of the end plate 3. Is supported from the inside. The end portion end plate 3B fixed to both ends of the holder case 2 is fixed to the adjacent sub end plate 3A, or is sandwiched by the outer case 6 and fixed to the opposing surface of the sub case 2A.

  Furthermore, as shown in the sectional view of FIG. 4, the sub-end plate 3 </ b> A is provided with an insertion holding portion 27 that protrudes from the inner surface for holding the battery 1 in a fixed position. The insertion holding part 27 has a cylindrical shape in which the end of the battery 1 can be inserted and held in a fixed position, and the end of the battery 1 stored in the storage part 13 of the sub case 2A is inserted and held in a fixed position. . The battery 1 shown in the cross-sectional view of FIG. 4 is provided with end electrodes 5 that are narrower than the battery body at both ends, and the end electrodes 5 are inserted into the insertion holding portions 27 and arranged at fixed positions. The battery 1 to be inserted into the storage unit 13 is placed at a fixed position of the storage unit 13 with the end electrodes 5 provided at both ends being inserted into the insertion holding unit 27 of the end plate 3. Arranging the battery 1 at a fixed position of the storage unit 13 is important in order to make the cooling gap 10 between the battery 1 and the opposing wall 12 an accurate interval. This is because if the position of the battery 1 is shifted in the radial direction, the cooling gap 10 becomes unbalanced and the surface of the battery 1 cannot be cooled uniformly. The battery 1 placed at a fixed position with both ends inserted into the insertion holding portion 27 of the end plate 3 can be cooled to an ideal state by accurately providing the cooling gap 10 on the surface.

  Further, the sub case 2A shown in FIG. 4 and FIG. 5 is provided with a holding convex portion 17 that integrally holds the battery 1 to be inserted in a fixed position on the inner surface of the storage portion 13. The sub case 2 </ b> A in this figure protrudes to the center of the storage portion 13 and is provided with a holding convex portion 17 so as to hold the center portion of the battery 1.

  In the above assembled battery, the center portion of the battery 1 is held by the sub case 2A, and both end portions of the battery 1 are held at fixed positions by the end plate 3, so that each battery 1 is disposed at an accurate position of the sub case 2A. it can.

  The sub-end plate 3A is fixed to the two sub-cases 2A via the two connecting rods 8. The assembled battery shown in FIGS. 2 to 6 has an outer case 6 fixed to the outside of the holder case 2. The connecting rod 8 that fixes the exterior case 6 fixes the sub-end plate 3A to the sub-case 2A. Accordingly, the connecting rod 8 penetrates the outer case 6, the sub end plate 3A, and the sub case 2A. The connecting rod 8 shown in the figure is a bolt provided with a male screw portion 8B at the tip, and a nut 9 is screwed into the male screw portion 8B to fix the outer case 6, the sub-end plate 3A, and the sub case 2A. The outer case 6 is provided with an insertion hole 36 at a position where the connecting rod 8 is inserted. 2 and 5 has a groove portion 37 extending in the longitudinal direction, and an insertion hole 36 is opened in the groove portion 37. The outer case 6 can be structured such that the bolt head 8 </ b> A and the nut 9 of the connecting rod 8 are guided to the groove portion 37 so that they do not protrude from the outer case 6.

  2 and 5 is a connecting rod 8 for fixing the outer case 6, and the sub-end plate 3A is fixed to the sub-case 2A. The connecting rod penetrates the sub-end plate and the sub-case, and this connection It is also possible to adopt a structure in which the sub end plate is fixed to the sub case with a rod, and the outer case is fixed to the end plate or the holder case with another set screw.

  Further, in the assembled battery of FIGS. 2 to 6, the holder case 2 that stores the battery 1 is stored in the outer case 6, and the cooling duct 7 is provided between the outer case 6 and the holder case 2.

  The exterior case 6 is a metal case, and includes a lower case 31, an upper case 32 connected to the side wall portion 31 </ b> A of the lower case 31, and an end face plate 33 that closes both ends of the lower case 31 and the upper case 32. Become. The lower case 31 is formed by bending a metal plate into a shape having side wall portions 31A on both sides. The lower case 31 has an inner width wider than the outer width of the holder case 2 so that the cooling ducts 7 can be provided on both sides of the holder case 2 as shown in the sectional views of FIGS. Yes. The upper case 32 can cover the upper surface and both side surfaces of the holder case 2 and bend the metal plate into a groove shape that can be provided with the cooling duct 7 on both sides of the holder case 22, and the lower end edge of the upper case 32 is a set screw 35. It is fixed to the lower case 31. The assembled battery of FIG. 2 is provided with a connecting duct 34 connected to the cooling duct 7 between the holder case 2 and the outer case 6 on the end face plate 33 that closes the right end of the outer case 6 in this figure. In FIG. 2, an end face plate that closes the left end of the outer case 6 closes the openings of the lower case 31 and the upper case 32, although not shown.

  The assembled battery of FIG. 6 is provided with an inflow-side cooling duct 7A on the upper side of the holder case 2 and a discharge-side cooling duct 7B on the lower side of the holder case 2 in the figure. Therefore, this assembled battery cools the battery 1 by forcibly blowing air to the cooling duct 7A on the inflow side → the inlet 18 → the cooling gap 10 → the outlet 19 → the cooling duct 7B on the outlet side. In this assembled battery, a fluid such as air for cooling the battery 1 flows from the cooling duct 7A on the inflow side into the holder case 2, and the battery 1 is cooled by exhausting the fluid from the cooling duct 7B on the discharge side to the outside. . A fluid such as air passes through the cooling gap 10 provided between the surface of the battery 1 and the opposing wall 12 of the holder case 2 to cool the battery 1. The fluid that flows into the cooling gap 10 is air. However, fluid made of gas or liquid other than air can be used as the fluid flowing through the cooling gap. Hereinafter, the fluid that flows into the cooling gap and cools the battery 1 will be described in detail as air, but the fluid is not specified as air.

The above assembled battery is assembled in the following steps.
(1) The battery 1 is inserted into the storage portion 13 of the sub case 2A and stored in a fixed position.
(2) The sub cases 2A containing the batteries 1 are arranged in a straight line, and the sub end plates 3A are arranged side by side on the opposing surface.
(3) The bus bar 4 is disposed on the sub-end plate 3A, and the bus bar 4 is fixed to the end electrode 5 of the battery 1 housed in the sub-case 2A. In this state, the battery assembly 30 is assembled by fixing the sub-end plate 3A to the opposing surface of the sub-case 2A and disposing the bus bar 4 on the sub-end plate 3A.
(4) The battery assembly 30 is placed on the lower case 31 of the outer case 6, and the upper case 32 is placed on the lower case 31.
(5) The connecting rod 8 is inserted so as to penetrate the outer case 6.

  The connecting rod 8 is inserted into the upper case 32, the upper sub-end plate 3A, the connecting hole 16 of the sub-case 2A, the lower sub-end plate 3A, and the lower case 31. The connecting rod 8 passes through the central portion of the sub-end plate 3A and is inserted into the boundary portion of the sub-case 2A that is disposed adjacently, thereby fixing the adjacent sub-case 2A to the sub-end plate 3A. 6 and 8, the two connecting rods 8 are inserted through the boundary of the sub case 2A, and the adjacent sub case 2A is fixed to the sub end plate 3A with the two connecting rods 8. The two connecting rods 8 are inserted by inserting the upper half of the connecting rod 8 arranged at the upper right in FIG. 8 into the connecting hole 16 of the right subcase 2A and the lower half through the connecting hole 16 of the left subcase 2A. The lower left connecting rod 8 has the upper half inserted through the connecting hole 16 of the left subcase 2A and the lower half inserted through the connecting hole 16 of the right subcase 2A.

(6) The nut 9 is screwed into the male screw portion 8B provided at the tip of the connecting rod 8 protruding from the lower case 31, and the connecting rod 8 is fixed.

  In the assembled battery assembled in the above state, a pair of sub-end plates 3A are arranged inside the outer case 6 composed of the lower case 31 and the upper case 32, and further, the sub-case 2A is arranged inside the sub-end plate 3A. The lower case 31 and the upper case 32 are fastened with the connecting rod 8, and the exterior case 6, the sub-end plate 3A, and the sub-case 2A are fixed in an integral structure.

It is a disassembled perspective view of the conventional assembled battery. It is a perspective view of the assembled battery of the power supply device for vehicles concerning one Example of this invention. It is a top view of the assembled battery shown in FIG. It is the sectional view on the AA line of the assembled battery shown in FIG. FIG. 3 is a cross-sectional view of the assembled battery shown in FIG. FIG. 3 is an enlarged horizontal sectional view of the assembled battery shown in FIG. 2. It is a perspective view of the battery assembly of the assembled battery shown in FIG. It is a disassembled perspective view which shows the connection structure of a subcase and a subend plate. It is a disassembled perspective view which shows the connection structure of the subcase and subend plate of the assembled battery of the power supply device for vehicles concerning the other Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Battery 2 ... Holder case 2A ... Sub case 3 ... End plate 3A ... Sub end plate
3B ... End plate 4 ... Bus bar 5 ... End electrode 6 ... Exterior case 7 ... Cooling duct 7A ... Cooling duct on the inflow side
7B ... Cooling duct on the discharge side 8 ... Connecting rod 8A ... Bolt head
8B ... Male screw part 9 ... Nut 10 ... Cooling gap 11 ... Venting wall 12 ... Opposing wall 13 ... Storage part 14 ... Protruding part 14A ... Protruding part
14B ... Projection 15 ... Connection cylinder 16 ... Connection hole 17 ... Holding projection 18 ... Inlet 19 ... Discharge port 22 ... Insertion part 23 ... Insertion rib 24 ... Stop hole 25 ... Supporting rib 26 ... Connection hole 27 ... Insertion Holding part 28 ... Set screw 30 ... Battery assembly 31 ... Lower case 31A ... Side wall part 32 ... Upper case 33 ... End face plate 34 ... Connection duct 35 ... Set screw 36 ... Insertion hole 37 ... Groove part 42 ... Holder case 42A ... Sub case 55 ... Connecting cylinder 56 ... Connecting hole 91 ... Cylindrical battery 92 ... Holder case 92A ... Upper holder
92B ... Lower holder 93 ... End plate 94 ... Battery storage part 95 ... Round 96 ... Bus bar

Claims (6)

A holder case (2), (42) in which a plurality of batteries (1) are housed in a parallel orientation and the end electrodes (5) of the battery (1) are arranged on the opposite surface, and this holder case (2) The bus bar (4) is connected to the end electrode (5) of the battery (1) and connected to the battery (1) in series or in parallel. A battery pack for a vehicle power supply device comprising a plate (3),
The holder case (2), (42) and the end plate (3) are divided into a plurality of sub cases (2A), (42A) and a sub end plate (3A) so that the longitudinal direction is divided into a plurality of regions. And
Each divided sub-end plate (3A) is fixed to two adjacent sub-cases (2A) and (42A), and adjacent sub-cases (2A) with sub-end plates (3A). , (42A) connected battery assembly for a vehicle power supply device.   The assembled battery for a vehicle power supply device according to claim 1, wherein the sub cases (2A) and (42A) contain batteries (1) in a plurality of rows and a plurality of stages.   The battery (1) housed in the sub-case (2A), (42A) is a single cylindrical battery or a battery module formed by connecting unit cells made of a plurality of cylindrical batteries in a straight line. The assembled battery of the vehicle power supply device according to claim 1.   A pair of sub-end plates (3A) fixed to the opposing surfaces of the sub-cases (2A) and (42A) are fixed to the sub-cases (2A) and (42A) via the connecting rod (8). Connecting holes (16) and (56) for inserting the connecting rod (8) are provided in the sub case (2A) and (42A), and the connecting rod (8) is inserted into the connecting holes (16) and (56). The assembled battery of the vehicle power supply device according to claim 1, wherein the sub-end plate (3A) is fixed to the sub-cases (2A), (42A) via the connecting rod (8).   The power source for vehicles according to claim 4, wherein the adjacent sub-case (2A) is provided with a connecting hole (16) inserted through one connecting rod (8) in the axial direction. The battery pack of the device.   The bus bar (4) is connected to the end electrode (5) of the sub case (2A) and (42A) arranged adjacent to each other, and the adjacent sub case (2A) and (42A) are connected to the bus bar ( The assembled battery of the vehicle power supply device according to claim 1, which is connected in 4).

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