JP2007035521A - Power supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a short circuit of a battery module caused by an electrolyte by preventing the diffusion of an electrolyte leaking from a safety valve by an extremely simple structure. <P>SOLUTION: A power supply device stores battery modules 1 in place as clamping them from opposite sides between a pair of battery holders 2 of insulating material. The pair of battery holders 2 have clamp walls 3 for clamping ends of the battery modules 1. One clamp wall 3 situated on one side of the battery modules 1 has recesses 4 in an abutting edge, and the other clamp wall 3 has projections 5 fitted in the recesses 4 in an abutting edge. The clamp walls 3 clamp the ends of the battery modules 1 from opposite sides with the projections 5 fitted in the recesses 4 at the abutting edges. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention mainly relates to a power supply device used for an electric vehicle such as a hybrid car.

  The power supply device that houses the battery module in the battery holder is sandwiched between the battery modules by a pair of battery holders and arranged at a fixed position. The battery module is obtained by connecting a plurality of secondary batteries. This power supply device is provided with a safety valve in the secondary battery in order to prevent destruction of the outer can of the secondary battery. The safety valve opens when the internal pressure of the outer can becomes higher than the set pressure. The safety valve that opens opens gas and electrolyte from the outer can to prevent the internal pressure from rising. This battery module can be safely used by preventing the outer can from being destroyed by a safety valve. However, since the electrolyte discharged from the safety valve that opens is excellent in conductivity, it causes a short circuit of the battery module. In particular, the power supply device in which the end portion of the battery module is sandwiched between the sandwiching walls of the pair of battery holders and disposed at a fixed position has a problem that the electrolytic solution easily causes a short circuit. Since there is an electrode terminal at the end of the battery module, the contact edge of the clamping wall that clamps the end will cause the electrolyte to short-circuit the electrode terminal if the electrolyte is diffused by capillary action. is there. A short circuit of the battery module due to the electrolytic solution causes the battery module to deteriorate significantly. Therefore, it is important for the power supply device to prevent the battery module from being short-circuited by the electrolyte even if the safety valve is opened and the electrolyte leaks.

Batteries that prevent the harmful effects of the electrolyte discharged from the safety valve have been developed. (See Patent Document 1)
JP 2002-216721 A

  Patent Document 1 describes a structure in which an anti-leakage material having a large number of grooves having a small width on the surface is disposed at the end of a battery. The leakage preventing material prevents the electrolyte leaking from the battery from diffusing due to capillary action. In this structure, it is necessary to provide a dedicated space for disposing the liquid leakage countermeasure material. In addition, as a dedicated member for preventing the electrolyte from diffusing, the leakage prevention material is disposed at a specific position, so that the overall structure is complicated, manufacturing and assembly are troublesome, and the manufacturing cost increases. There are drawbacks.

  The present invention has been developed for the purpose of solving this drawback. An important object of the present invention is to provide a power supply device that has an extremely simple structure, prevents diffusion of an electrolyte solution leaking from a safety valve, and prevents a battery module from being short-circuited due to the electrolyte solution.

  According to the first aspect of the present invention, the battery module 1 is sandwiched from both sides with a pair of battery holders 2 made of an insulating material and stored in a fixed position. The pair of battery holders 2 has a sandwiching wall 3 that sandwiches the end of the battery module 1. One clamping wall 3 located on one side of the battery module 1 is provided with a recess 4 at the contact edge, and the other clamping wall 3 is provided with a projection 5 fitted into the recess 4 at the contact edge. ing. The clamping wall 3 has the convex part 5 inserted into the concave part 4 at the contact edge to clamp the end of the battery module 1 from both sides.

  According to a second aspect of the present invention, the battery module 1 is sandwiched from both sides and stored in a fixed position by the pair of battery holders 2 made of an insulating material. The pair of battery holders 2 has a sandwiching wall 3 that sandwiches the end of the battery module 1. A pair of clamping walls 3 that clamp the end portions of the battery module 1 from both sides have a liquid storage space 6 that stores liquid that passes through the gap between the contact edges due to capillary action in the middle of the contact edges that contact each other. Is provided.

  According to a third aspect of the present invention, the battery module 1 is sandwiched from both sides with a pair of battery holders 2 made of an insulating material and stored in a fixed position. The pair of battery holders 2 has a sandwiching wall 3 that sandwiches the end of the battery module 1. One clamping wall 3 located on one side of the battery module 1 is provided with a recess 4 at the contact edge, and the other clamping wall 3 is provided with a projection 5 fitted into the recess 4 at the contact edge. ing. Further, the pair of sandwiching walls 3 that sandwich the end portion of the battery module 1 from both sides have a liquid reservoir that stores liquid passing through the gap between the contact edges due to capillary action in the middle of the contact edges that contact each other. A gap 6 is provided. The clamping wall 3 has the convex part 5 inserted into the concave part 4 at the contact edge to clamp the end of the battery module 1 from both sides.

  A power supply device according to a fourth aspect of the present invention is the power supply device according to the first or third aspect, wherein the recesses 4 and the protrusions 5 that are fitted to each other are provided at the contact edges of the pair of sandwiching walls 3. Provided. Furthermore, the power supply device according to claim 5 of the present invention is the power supply device according to claim 1 or 3, wherein the contact edges of the sandwiching walls 3 that contact each other are stepped in a cross-sectional shape orthogonal to the longitudinal direction. It has 30 shapes.

  According to a sixth aspect of the present invention, the battery module 1 is sandwiched from both sides with a pair of battery holders 2 made of an insulating material and stored in a fixed position. The pair of battery holders 2 has a sandwiching wall 3 that sandwiches the end of the battery module 1. Further, in the power supply device, an end plate 7 made of an insulating material is fixed to the outer surface of the sandwiching wall 3 and the electrodes of the battery module 1 are connected by a bus bar 8. The end plate 7 is provided with a liquid blocking groove 9 on the surface facing the sandwiching wall 3 for blocking the liquid from diffusing due to capillary action.

  Furthermore, a power supply device according to a seventh aspect of the present invention is the power supply device according to any one of the first to fifth aspects, wherein the pair of battery holders 2 sandwich the ends of the battery module 1. An end plate 7 made of an insulating material is fixed to the outer surface of the sandwiching wall 3 and the electrodes of the battery module 1 are connected by a bus bar 8. Further, the end plate 7 is provided with a liquid blocking groove 9 on the surface facing the sandwiching wall 3 for blocking the liquid from diffusing due to capillary action.

  The power supply device according to the present invention has a very simple structure and can prevent diffusion of the electrolyte solution leaking from the safety valve and prevent a short circuit of the battery module caused by the electrolyte solution. This is because the power supply device according to claims 1 to 3 of the present invention is provided with a structure in which the concave portion and the convex portion can be fitted to the abutting edge of the clamping wall for clamping the end of the battery module, or This is because a liquid storage space is provided in the middle of the contact edge to prevent the liquid storage space from diffusing into the gap between the contact edges of the sandwiching wall due to capillary action. In particular, the power supply device of the present invention prevents the electrolyte from diffusing by changing the shape of the contact edge of the clamping wall that clamps and holds the battery module. It is not necessary to provide a dedicated part for this purpose. For this reason, there is a feature that the structure and assembly can be simplified and manufactured at low cost.

  In the power supply device according to claim 6 of the present invention, the end plate is fixed to the outer surface of the sandwiching wall of the battery holder, and the liquid diffuses by a capillary phenomenon on the surface facing the sandwiching wall of the end plate. Therefore, it is possible to effectively prevent the electrolyte from diffusing due to capillary action in the gap formed between the sandwiching wall and the end plate. This power supply also prevents the electrolyte from diffusing by providing a liquid blocking groove on the end plate that is already equipped, so there is no need to provide a dedicated part to prevent the diffusion of the electrolyte, and the structure and assembly are simple. Thus, the manufacturing cost can be reduced.

  Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below exemplify a power supply device for embodying the technical idea of the present invention, and the present invention does not specify the power supply device as follows.

  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 power supply apparatus of the present invention is mainly mounted on a vehicle such as a hybrid car, and is used as a power source for driving a motor that drives the vehicle. 1 to 3 show a power supply device that drives a motor that is mounted on a vehicle and runs the vehicle. However, the power supply device of the present invention is not necessarily used for a vehicle, and is also used for a power supply of a robot or the like, for example.

  The power supply device shown in the figure has a battery module 1 sandwiched from both sides with a pair of battery holders 2 and housed in a fixed position.

  In the battery module 1, a plurality of batteries 10 are linearly connected in series. The battery 10 is a rechargeable secondary battery such as a nickel-hydrogen battery, a lithium ion secondary battery, or a nickel cadmium battery. The battery 10 shown in the figure is a cylindrical battery, but may be a square battery.

  As shown in the sectional view of FIG. 4, the battery 10 hermetically seals the opening of the outer can 11 with a sealing plate 12. The outer can 11 and the sealing plate 12 are metal plates. The sealing plate 12 incorporates a safety valve 16. The safety valve 16 opens when the internal pressure of the battery 10 becomes higher than the set pressure. The safety valve 16 that opens the valve discharges the gas and electrolyte in the battery 10 and prevents the internal pressure from increasing.

  The outer can 11 is manufactured by press-molding a metal plate into a cylindrical shape with a bottom. The sealing plate 12 is provided with a convex electrode 13 in the center. The outer can 11 has an electrode (not shown) incorporated therein and is filled with an electrolytic solution. The outer can 11 has a sealing plate 12 hermetically fixed by caulking the end of the opening. The sealing plate 12 is sandwiched between the caulked portions of the outer can 11 via the gasket 14 and is hermetically fixed. The gasket 14 is a rubber-like elastic body made of an insulating material. The gasket 14 insulates the sealing plate 12 and the outer can 11 and airtightly closes the gap between the sealing plate 12 and the outer can 11. A crimping ridge 15 is provided on the periphery of the sealing plate 12.

  As shown in FIG. 4, the battery module 1 has a plurality of batteries 10 connected by a connecting body 17. The connection body 17 connects the batteries 10 in a straight line in series. In the illustrated battery module 1, a sealing plate 12 of one battery 10 and a bottom surface of an outer can 11 of the other battery 10 are connected by a connection body 17. The connection body 17 is formed by press-molding a metal plate, and is welded to the battery end surface of the battery 10 disposed to face the battery body 10 to electrically connect the batteries 10 in series.

  5 and 6 show the connection body 17. 5 is a plan view, and FIG. 6 is a cross-sectional view. These connectors 17 are formed with a metal plate in a ring shape with holes, and are provided with a plurality of welding projections 18 that protrude from both sides and are welded to the battery end face. The welding projections 18 projecting on both surfaces are welded to opposite battery end surfaces to connect the secondary batteries 10 disposed adjacent to each other in series. The connection body 17 shown in the figure is provided with a central hole 19 in which the convex electrode 13 is disposed.

  As shown in FIG. 4, the connection body 17 shown in FIGS. 5 and 6 has an outer shape smaller than the inner shape of the crimping ridge 15 provided on the battery end face. Since the secondary battery 10 uses the sealing plate 12 as the first electrode and the outer can 11 as the second electrode, the caulking ridge 15 in which the connection body 17 connected to the sealing plate 12 is a part of the outer can 11. Short circuit when touching. The connecting body 17 is provided with a gap between the outer peripheral edge and the caulking ridge 15 to prevent the connecting body 17 from coming into contact with the caulking ridge 15 and short-circuiting. When the position of the connecting body 17 is shifted, the connecting body 17 comes into contact with the caulking ridges 15, so that the connecting body 17 is held in place by the insulating ring 20.

  This connection body 17 is provided with a plurality of welding projections 18 on the same circumference. The welding convex portions 18 alternately protrude upward and downward in FIG. The welding convex part 18 which protrudes on the opposite surface is welded and connected to the battery end surface arranged oppositely.

  In the battery module 1 shown in the cross-sectional view of the figure, an insulating ring 20 is fixed to a connecting portion of the battery 10. The insulating ring 20 is manufactured by molding plastic into a cylindrical shape. The cylindrical insulating ring 20 is formed into an inner shape into which the end of the battery 10 can be inserted. The insulating ring 20 is provided with a closed chamber 21 between the batteries 10 by inserting the ends of the batteries 10 facing each other. When the safety valve 16 of the battery 10 is opened, gas and electrolyte are discharged into the closed chamber 21. In order to discharge the gas and electrolyte discharged here, the insulating ring 20 is provided with a discharge port 22 therethrough.

  Further, the battery module 1 has output terminals 23 fixed at both ends thereof. The output terminal 23 has a protruding portion 23 </ b> A that protrudes in a columnar shape from the end surface of the battery module 1. The protruding portion 23A is provided with a female screw hole 23B into which a set screw (not shown) for fixing the bus bar 8 is screwed. The battery module 1 has a positive output terminal 23 fixed at one end and a negative output terminal 23 fixed at the other end. The positive and negative output terminals 23 are distinguished from each other by making the shape of the protruding portion 23A different. In the illustrated battery module 1, the protruding portion 23 </ b> A of the output terminal 23 has a cylindrical shape, and the positive and negative are identified by changing the outer diameter of the column.

  The battery module 1 is covered with an insulating tube 24 on the surface. The insulating tube 24 is a heat shrinkable tube. The heat-shrinkable tube is heated with the battery module 1 inserted, and is in close contact with the surface of the battery 10 and the insulating ring 20. However, the insulating tube is not necessarily a heat-shrinkable tube, and any sheet that can cover the surface in an insulating state can be used. The insulating tube 24 is slightly longer than the entire length of the battery module 1 and covers the outer peripheral edge portions of both end faces of the battery module 1. The battery module 1 covered with the insulating tube 24 discharges gas and electrolyte discharged from the safety valve 16 to be opened from the end. Gas or electrolyte discharged from the safety valve 16 that opens to the closed chamber 21 between the batteries 10 is discharged from the discharge port 22 of the insulating ring 20 to the inside of the insulating tube 24, and between the insulating tube 24 and the battery 10. This is because it is allowed to pass through and discharged from the end.

  The power supply device shown in FIG. 1 to FIG. 3 stores a plurality of battery modules 1 in two stages apart in the vertical direction. In the power supply apparatus shown in these drawings, the battery module 1 is sandwiched between the upper and lower battery holders 2A and 2B and the intermediate battery holder 2C and placed at a fixed position. In this specification, the vertical direction is determined in the drawings for easy understanding. The power supply device is used in the posture shown in the figure, or used in a posture rotated 90 degrees from the state shown in the drawing, or used in a tilted posture. Therefore, the attitude for using the power supply device of the present invention is not specified. Regardless of the posture of the power supply device, the gap in the clamping wall that clamps the end of the battery module is a gap that diffuses the electrolyte solution by capillary action.

  The battery modules 1 arranged on the same upper surface are sandwiched between the upper battery holder 2A and the intermediate battery holder 2C, and are arranged at fixed positions. The battery modules 1 arranged in the lower stage are sandwiched between a lower battery holder 2B and an intermediate battery holder 2C, and are arranged at fixed positions. In this power supply device, a pair of battery holders sandwiching the upper battery module 1 is an upper battery holder 2A and an intermediate battery holder 2C, and a pair of battery holders sandwiching the lower battery module 1 are The battery holder 2B and the intermediate battery holder 2C are used.

  A battery holder 2 that sandwiches the battery module 1 in the upper and lower directions includes a sandwiching wall 3 that sandwiches an end of the battery module 1. In the illustrated battery holder 2, an output terminal 23 provided at an end of the battery module 1 is sandwiched by a sandwiching wall 3. Furthermore, the battery holder 2 shown in the drawing is provided with a plurality of intermediate walls 25 that sandwich and hold the middle of the battery module 1 between the sandwiching walls 3 of the battery module 1. The intermediate wall 25 sandwiches and holds the insulating ring 20 provided at the battery connection portion of the battery module 1. The intermediate wall 25 is provided with a semicircular recess 26 into which the battery module 1 is inserted so as to sandwich and hold the battery module 1. The intermediate wall 25 puts the battery module 1 in the recess 26 and sandwiches it from both sides and is arranged at a fixed position. The battery holder 2 having this structure holds the elongated battery module 1 firmly and stably at a fixed position by both the intermediate wall 25 and the sandwiching wall 3.

  In the figure, the upper and lower sandwiching walls 3 sandwich the output terminal 23 that is the end of the battery module 1 with the contact edges in contact with each other. The upper and lower clamping walls that sandwich the battery module are between the abutting edges, more precisely between the abutting edge below the upper clamping wall and the abutting edge above the lower clamping wall. A narrow gap for diffusing the electrolyte solution by capillary action is formed. The electrolyte solution diffusing through this gap shorts the output terminals of adjacent battery modules. In order to prevent this adverse effect, the sandwiching wall 3 shown in the figure is provided with a concave portion 4 at one abutting edge and a convex portion 5 that fits into the concave portion 4 at the other abutting edge.

  The battery holder 2 shown in FIG. 3 and FIG. 7 to FIG. 10 is provided with both the concave portion 4 and the convex portion 5 that are fitted to each other at the contact edge of the clamping wall 3. The contact edge can deepen the concave portion 4 and raise the convex portion 5 to more effectively prevent the electrolyte from diffusing. Therefore, the depth of the concave portion 4 and the height of the convex portion 5 are, for example, deeper than 5 mm, preferably deeper than 8 mm, more preferably deeper than 10 mm. The sandwiching wall 3 shown in the figure has one concave portion 4 and convex portion 5 at each abutting edge, but the abutting edge of the sandwiching wall is provided with one of a concave portion and a convex portion, or a plurality of concave portions. And a convex part can also be provided.

  Further, the sandwiching wall 3 of the battery holder 2 shown in FIG. 3 and FIGS. 7 to 10 has a liquid storage space 6 for storing liquid passing through the gap of the contact edge by capillary action in the middle of the contact edges that contact each other. Is provided. In the battery holder 2 shown in these drawings, a liquid storage space 6 is provided in the middle of a vertical portion located between the convex portion 5 and the concave portion 4. The liquid storage space 6 has a wide clearance between the contact edges, and prevents the electrolyte from diffusing due to capillary action. In order to prevent the electrolyte solution from diffusing due to the capillary phenomenon, the liquid storage space 6 has, for example, an inner diameter of 2 mm or more, preferably 3 mm or more, more preferably 4 mm or more. If the liquid reservoir gap 6 is too large, there is a harmful effect such that the cooling air inside the battery holder 2 is likely to leak. Therefore, the inner diameter of the liquid reservoir gap 6 is 15 mm or less, preferably 10 mm or less, more preferably 8 mm or less. .

  The power supply device described above is provided with the concave portion 4 and the convex portion 5 at the contact edge of the sandwiching wall 3, and further provided with the liquid storage space 6, so that it is extremely effective for the electrolyte solution to diffuse along the contact edge. Can be blocked. However, the power supply device of the present invention does not provide a liquid reservoir gap, and provides a concave portion and a convex portion at the contact edge of the sandwiching wall to prevent the electrolyte from diffusing, or without providing a concave portion and a convex portion. A reservoir gap can be provided to prevent the electrolyte from diffusing.

  In the power supply device, the temperature of the battery module 1 increases depending on the use environment in which the battery 10 is charged and discharged. The rise in temperature of the battery module 1 not only lowers the electrical characteristics of the battery 10, but also severely deteriorates and shortens the life. This problem can be solved by forcibly blowing cooling air into the battery holder 2 and forcibly cooling the battery module 1. The power supply apparatus shown in the figure has an air duct 27 provided with a closed structure inside the battery holder 2, and cooling air is forcibly blown into the air duct 27 to cool the battery module 1.

  In the illustrated battery holder 2, end walls 28 are integrally formed so as to connect both ends of the sandwiching wall 3. That is, the end wall 28 and the sandwiching wall 3 are provided in the periphery, and the end wall 28 and the sandwiching wall 3 serve as an air duct 27 for forcibly blowing air inside. The end wall 28 is provided with an air opening 29 for forcibly blowing the cooling air of the battery module 1. Cooling air is forcibly blown into the inside from the air opening 29. The forcedly blown air passes between the sandwiching wall 3 and the intermediate wall 25 and further between the intermediate walls 25 to cool the battery module 1. The air that has cooled the battery module 1 is discharged to the outside through an air opening 29 provided in another end wall 28.

  If the air in the air duct 27 leaks to the outside, the battery module 1 cannot be efficiently cooled. As shown in the sectional view of FIG. 11, the sandwiching wall 3 in the figure has a contact edge of the sandwiching wall 3 that is in contact with each other in a shape having a step 30 in a sectional shape orthogonal to the longitudinal direction. The sandwiching wall 3 having this structure can efficiently cool the battery module 1 by preventing cooling air from passing through the gap between the contact edges and leaking to the outside. Since the battery holder 2 forcibly blows air that cools the battery module 1 inside, it is important to reduce air leakage from the gap between the sandwiching walls 3. This is because if the cooling air leaks from the gap between the sandwiching walls 3, the flow rate of the air that cools the battery module 1 decreases, and the cooling efficiency decreases.

  Further, as shown in FIG. 11, the sandwiching wall 3 provided with the step 30 at the contact edge can reduce the diffusion of the electrolyte due to the capillary phenomenon. As shown in FIG. 11, the contact edges that are provided with steps 30 on both sides and make the entire surfaces of the steps 30 approach each other widen the gap area that the contact edges contact, thereby reducing the diffusion of the electrolyte. When the gap area is wide, the electrolyte solution that diffuses the gap by capillary action requires a large volume. In other words, a small amount of electrolyte cannot be diffused into a wide space. For this reason, providing the step 30 to widen the contact area can reduce the diffusion of the electrolyte due to the capillary phenomenon.

  The sandwiching wall 123 shown in FIG. 12 brings one of the steps 1230 into contact with each other, but a gap 1231 is provided on the other of the other steps 1230 to reduce the diffusion of the electrolyte. This is because a large amount of electrolyte is stored at the contact edge with the gap 1231 to reduce the diffusion of the electrolyte.

  Further, in the power supply device shown in FIGS. 1 to 3, an end plate 7 made of an insulating material is fixed to the outer surface of the sandwiching wall 3 of the battery holder 2, and the electrodes of the battery module 1 are connected by the bus bar 8. . The end plate 7 is manufactured by molding plastic. The end plate 7 opens an electrode window 32 that exposes the output terminal 23 of the battery module 1 to the outside. The end plate 7 shown in the figure has a rectangular electrode window 32 in order to independently and independently expose the output terminals 23 of the respective battery modules 1.

  The output terminal 23 exposed to the outside from the electrode window 32 is connected to the bus bar 8 with a set screw (not shown). The set screw is inserted into a through hole 8 </ b> A provided in the bus bar 8, and the front end portion is screwed into the female screw hole 23 </ b> B of the output terminal 23 to fix the bus bar 8 to the output terminal 23. The bus bar 8 is a metal plate having a small electric resistance, and is connected to the output terminal 23 of the adjacent battery module 1 to connect the battery modules 1 in series or in parallel. The end plate 7 shown in FIGS. 13 and 15 is provided with a protrusion 33 integrally formed between the bus bars 8 in order to insulate the adjacent bus bars 8.

  The end plate 7 is in close contact with the outer surface of the sandwiching wall 3. For this reason, the electrolytic solution diffuses through a fine gap between the sandwiching wall 3 and the end plate 7 by a capillary phenomenon. In order to prevent this adverse effect, the end plate 7 shown in FIGS. 14 and 15 is provided with a liquid blocking groove 9 on the surface facing the sandwiching wall 3 to prevent liquid from diffusing due to capillary action. The liquid blocking groove 9 is provided between the electrode windows 32 so as to partition the electrode window 32. The liquid blocking groove 9 stores an electrolytic solution by increasing a gap formed between the liquid blocking groove 9 and the sandwiching wall 3. The end plate 7 prevents the electrolyte solution from diffusing and shorting the output terminal 23 of the battery module 1 with the liquid blocking groove 9.

  Further, in the power supply device that fixes the end plate 7 to the outer surface of the sandwiching wall 3, the liquid reservoir space 6 provided in the sandwiching wall 3 is closed by the end plate 7. For this reason, it can prevent that the air forcedly ventilated by the air duct 27 inside the battery holder 2 leaks outside from the liquid storage space | gap 6. FIG.

It is a perspective view of the power supply device concerning one Example of this invention. It is the bottom perspective view which looked at the power unit shown in Drawing 1 from the back. It is a disassembled perspective view of the power supply device shown in FIG. It is an expanded sectional side view of a battery module. It is a top view of a connection body. FIG. 6 is a cross-sectional view taken along line AA of the connection body illustrated in FIG. 5. It is a perspective view of a lower battery holder. It is a perspective view of an intermediate battery holder. It is a perspective view which shows the state which arranges a battery module in a battery holder. It is a front view which shows the clamping wall of a battery holder. It is an expanded sectional view of a clamping wall. It is an expanded sectional view showing other examples of a pinching wall. It is a perspective view of the end plate of the power supply device shown in FIG. It is the perspective view which reversed the front and back of the end plate shown in FIG. It is a perspective view of the end plate of the power supply device shown in FIG. It is the perspective view which reversed the front and back of the end plate shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Battery module 2 ... Battery holder 2A ... Battery holder on
2B ... Lower battery holder
2C ... Intermediate battery holder 3, 123 ... Clamping wall 4 ... Recess 5 ... Projection 6 ... Liquid reservoir 7 ... End plate 8 ... Bus bar 8A ... Through hole 9 ... Liquid blocking groove 10 ... Battery 11 ... Exterior can 12 ... Sealing plate 13 ... Convex electrode 14 ... Gasket 15 ... Caulking ridge 16 ... Safety valve 17 ... Connector 18 ... Welding projection 19 ... Center hole 20 ... Insulating ring 21 ... Closed chamber 22 ... Discharge port 23 ... Output terminal 23A ... Projection Part
23B ... Female screw hole 24 ... Insulating tube 25 ... Intermediate wall 26 ... Recess 27 ... Air duct 28 ... End wall 29 ... Air opening 30, 1230 ... Step 1231 ... Gap 32 ... Electrode window 33 ... Projection

Claims (7)

A power supply device in which a battery module (1) is sandwiched from both sides and stored in a fixed position with a pair of battery holders (2) made of an insulating material,
The pair of battery holders (2) has a sandwiching wall (3) that sandwiches the end of the battery module (1), and one sandwiching wall (3) located on one side of the battery module (1) is The contact edge is provided with a recess (4), and the other clamping wall (3) is provided with a protrusion (5) fitted into the recess (4) at the contact edge,
A power supply device in which a projecting portion (5) is fitted into a recessed portion (4) at the abutting edge of the sandwiching wall (3) and the end of the battery module (1) is sandwiched from both sides. A power supply device in which a battery module (1) is sandwiched from both sides and stored in a fixed position with a pair of battery holders (2) made of an insulating material,
The pair of battery holders (2) has a sandwiching wall (3) that sandwiches the end of the battery module (1), and the pair of sandwiches that sandwich the end of the battery module (1) from both sides. The wall surface (3) is a power supply device provided with a liquid storage space (6) for storing liquid that passes through the gap between the contact edges by capillary action in the middle of the contact edges that contact each other. A power supply device in which a battery module (1) is sandwiched from both sides and stored in a fixed position with a pair of battery holders (2) made of an insulating material,
The pair of battery holders (2) has a sandwiching wall (3) that sandwiches the end of the battery module (1), and one sandwiching wall (3) located on one side of the battery module (1) is The contact edge is provided with a recess (4), and the other clamping wall (3) is provided with a protrusion (5) fitted into the recess (4) at the contact edge,
Further, the pair of sandwiching walls (3) sandwiching the end of the battery module (1) from both sides is a liquid that passes through the gap between the contact edges by capillary action in the middle of the contact edges that contact each other. A liquid reservoir gap (6) for storing
A power supply device in which a projecting portion (5) is fitted into a recessed portion (4) at the abutting edge of the sandwiching wall (3) and the end of the battery module (1) is sandwiched from both sides.   The power supply device according to claim 1 or 3, wherein a concave portion (4) and a convex portion (5) to be fitted to each other are provided on the contact edges of the pair of sandwiching walls (3).   The power supply device according to claim 1 or 3, wherein the abutting edges of the sandwiching walls (3) that abut each other have a step (30) in a cross-sectional shape perpendicular to the longitudinal direction. A power supply device in which a battery module (1) is sandwiched from both sides and stored in a fixed position with a pair of battery holders (2) made of an insulating material,
The pair of battery holders (2) includes a sandwiching wall (3) that sandwiches the end of the battery module (1), and further, an end plate made of an insulating material on the outer surface of the sandwiching wall (3) ( 7) is fixed and the electrodes of the battery module (1) are connected by the bus bar (8),
A power supply device in which the end plate (7) is provided with a liquid blocking groove (9) for blocking liquid from being diffused by capillary action on a surface facing the sandwiching wall (3). A power supply device in which a battery module (1) is sandwiched from both sides and stored in a fixed position with a pair of battery holders (2) made of an insulating material,
The pair of battery holders (2) includes a sandwiching wall (3) that sandwiches the end of the battery module (1), and further, an end plate made of an insulating material on the outer surface of the sandwiching wall (3) ( 7) is fixed and the electrodes of the battery module (1) are connected by the bus bar (8),
The end plate (7) is provided with a liquid blocking groove (9) for blocking liquid diffusion due to capillary action on the surface facing the sandwiching wall (3). Power supply.

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