WO2012133710A1

WO2012133710A1 - Power supply and vehicle comprising same

Info

Publication number: WO2012133710A1
Application number: PCT/JP2012/058484
Authority: WO
Inventors: 高志瀬戸; 康広浅井; 橋本　裕之; 土屋　正樹; 貴英籠谷
Original assignee: 三洋電機株式会社
Priority date: 2011-03-31
Filing date: 2012-03-29
Publication date: 2012-10-04

Abstract

[Problem] To rapidly discharge gas from battery cells through discharge ducts while preventing the discharged gas from having a bad effect on battery blocks. [Solution] A power supply comprises: a plurality of battery blocks (2) each including a plurality of battery cells (1), the battery cells (1) having gas discharge holes (12) in surfaces of outer package cans and being stacked in a manner such that the gas discharge holes (12) are placed on the same plane; hollow discharge ducts (6) facing the gas discharge holes (12) of the battery cells to guide gas discharged through the gas discharge holes (12) to the outside; and a connection duct (7) to which the discharge ducts (6) disposed on the battery blocks (2) are connected so as to discharge gas from the discharge ducts (6) to the outside. In the power supply, the discharge ducts (6) are connected to the connection duct (7) through discharge valves (8), and the discharge valves (8) are opened in directions from the discharge ducts (6) to the connection duct (7) but closed in directions from the connection duct (7) to the discharge ducts (6).

Description

Power supply device and vehicle equipped with the same

The present invention relates to a power supply device that supplies electric power to a motor that drives a vehicle such as a hybrid vehicle or an electric vehicle, and a vehicle including the same, and in particular, a gas discharged from a gas discharge valve of a battery cell is externally provided by a discharge duct. The present invention relates to a power supply device that discharges to a vehicle and a vehicle including the same.

Since a battery system including a large number of battery cells can be connected in series to increase the output voltage, it is used for applications that are charged and discharged with a large current, such as a hybrid car power supply device. This battery system is discharged with a very large current when accelerating the vehicle, and is charged with a considerably large current in a state such as regenerative braking. In this battery system, a gas discharge valve is provided in the battery cell in order to prevent destruction in an abnormal state in which the internal pressure increases due to overcharge or overdischarge and to ensure safety. The gas discharge valve opens and exhausts gas when the internal pressure of the battery rises abnormally. In a battery system including a large number of battery cells, it is important to quickly exhaust the gas discharged from the battery cells to the outside. In particular, in a rectangular battery cell using a non-aqueous electrolyte solution such as a lithium ion battery, it is important to exhaust the exhaust gas promptly. In order to realize this, a battery system in which an exhaust tube is connected to an exhaust port of a gas exhaust valve of a battery cell has been developed (see Patent Document 1).

JP 2007-157633 A

The battery system of Cited Document 1 has an exhaust tube connected to a gas discharge port of a rectangular battery. In this battery system, the exhaust gas of the rectangular battery is exhausted to the outside through an exhaust tube. However, it is difficult for the battery system having this structure to discharge the high-temperature and high-pressure gas discharged from the gas discharge valve to the outside safely and reliably. This is because the exhaust tube is deformed or damaged by the high-temperature and high-pressure exhaust gas, and the gas is leaked to the outside.

The present applicants applied for a battery system comprising a metal discharge duct in order to discharge the high-temperature and high-pressure exhaust gas safely and reliably. In this battery system, as shown in the perspective view of FIG. 18 and the cross-sectional view of FIG. 19, a discharge duct 196 in which a metal plate is processed into a groove shape on a battery block 192 formed by stacking rectangular battery cells 191. Is fixed. Since the adjacent rectangular battery cells 191 have a potential difference in the outer can, an insulating separator 195 is sandwiched in order to insulate them. As shown in FIG. 19, the insulating separator 195 is integrally formed with an insulating plate portion 195a on the upper edge in order to insulate the metal discharge duct 196 and the rectangular battery cell 191.

On the other hand, in a battery system, a plurality of battery blocks provided with such a discharge duct may be connected. In particular, in a vehicle-mounted power supply device or the like that requires a large capacity, a single power supply device is configured by connecting a plurality of battery blocks in series and / or in parallel. In such a configuration, there is a problem in that the discharge ducts need to be piped for each battery block, and the arrangement of the discharge ducts becomes complicated. Further, downsizing of the battery system is also demanded. For example, in an in-vehicle power supply device, the power supply device must be arranged in a limited space. Therefore, it is conceivable to use a common exhaust duct.
However, if the discharge duct is shared, if any one of the battery blocks to which multiple units are connected has an abnormality and exhaust gas is generated, it will be connected to other normal battery blocks through the shared discharge duct. However, there was a possibility that the exhaust gas would flow in and have an adverse effect.

The present invention has been made to solve such problems, and its main purpose is to quickly discharge exhaust gas discharged from the battery cell through the discharge duct, Another object of the present invention is to provide a power supply device that can effectively prevent the exhaust gas discharged from the battery block from adversely affecting the battery block, and a vehicle including the same.
In addition, another important object of the present invention is that exhaust gas generated in any one of the battery blocks is routed through the common duct while the exhaust ducts arranged in the plurality of battery blocks are commonly piped. An object of the present invention is to provide a power supply device that can avoid adversely affecting the battery block of the vehicle and a vehicle including the same.

Means for Solving the Problems and Effects of the Invention

In order to achieve the above object, the power supply device according to the first aspect of the present invention includes an outer can, and includes a gas discharge valve 11 for discharging the gas generated inside the outer can. And stacking a plurality of battery cells 1 having gas discharge ports 12 for discharging gas from the gas discharge valve 11 on the surface of the outer can so that the gas discharge ports 12 are substantially flush with each other. A plurality of

battery blocks

2, 52, and the gas discharge ports 12 of the respective battery cells constituting the

battery blocks

2, 52, and the gas discharged from the gas discharge ports 12 to the outside The

hollow discharge ducts

6 and 56 to be exhausted and the

discharge ducts

6 and 56 disposed in the

battery blocks

2 and 52 are connected to discharge the gas flowing in from the

discharge ducts

6 and 56 to the outside.

Connection ducts

7 and 57 are provided. In the power supply device, the

discharge ducts

6 and 56 are connected to the

connection ducts

7 and 57 via a discharge valve 8, and the discharge valve 8 is connected from the

discharge ducts

6 and 56 to the

connection ducts

7 and 57. It opens toward the

discharge ducts

6 and 57 from the

connection ducts

7 and 5.
As a result, the exhaust gas discharged from the plurality of battery blocks can be quickly discharged to the outside by flowing into the connection duct from each discharge duct, and the exhaust gas is discharged due to an abnormality in any of the battery blocks. Even in the state, the exhaust valve surely prevents the exhaust gas from flowing into the discharge ducts of the other battery blocks, and can effectively prevent adverse effects on other normal battery blocks.
In addition, the exhaust ducts connected to the plurality of battery blocks are connected to the connection duct to discharge the exhaust gas to the outside. Therefore, the piping of the duct for exhausting the exhaust gas is simplified, and the entire power supply device is downsized. Can be arranged in a space-saving manner.

Further, according to the power supply device according to the second aspect, the plurality of

battery blocks

2 and 52 are disposed on both sides of the

connection ducts

6 and 56, and the discharge ducts are disposed in the

respective battery blocks

2 and 52. 6 and 56 can be connected such that the gas flow path direction is substantially perpendicular to the gas flow path direction of the connecting

ducts

7 and 57.
Thereby, while arranging a plurality of battery blocks in a space-saving manner, it is possible to efficiently discharge exhaust gas by connecting a plurality of discharge ducts arranged in these battery blocks to a single connection duct.

Further, according to the power supply device according to the third aspect, the plurality of battery blocks are arranged on one side of the connection duct, and the gas flow path direction of the discharge duct arranged in each battery block is the connection duct. It can connect so that it may become an attitude | position substantially orthogonal to a gas flow path direction.
Thereby, while arranging a plurality of battery blocks in a space-saving manner, it is possible to efficiently discharge exhaust gas by connecting a plurality of discharge ducts arranged in these battery blocks to a single connection duct.

Furthermore, the power supply device according to the fourth aspect has an outer can, and is provided with a gas discharge valve for discharging the gas generated inside the outer can, and the gas is discharged from the gas discharge valve. A battery block 2 in which a plurality of battery cells provided with gas discharge ports on the surface of the outer can are stacked in a posture in which the gas discharge ports are substantially flush with each other, and each of the battery blocks 2 And a hollow discharge duct 6 that is disposed to face the gas discharge port 12 of the battery cell 1 and exhausts the gas discharged from the gas discharge port 12 to the outside. Further, in the power supply device, the discharge duct 6 is provided with a discharge valve 8 in the discharge portion 26, and the discharge valve 8 opens from the inside of the discharge duct 6 to the outside and closes from the outside to the inside. I have to.
As a result, the exhaust gas discharged from the battery block can be quickly discharged to the outside, and it is possible to reliably prevent unwanted materials from entering the inside from the outside.

Further, according to the power supply device of the fifth aspect, the discharge valve 8 opens when the internal pressure in the

discharge ducts

6 and 56 rises above a predetermined pressure, and closes when the internal pressure falls below the predetermined internal pressure. The on-off valve can be used.
As a result, when the exhaust gas is discharged from the battery cell and the internal pressure in the discharge duct increases, the exhaust valve is opened to quickly discharge the exhaust gas to the outside, and after the exhaust gas is discharged, the exhaust valve is closed. Can be used repeatedly.

Further, according to the power supply device of the sixth aspect, the upper surface of the battery block 2 is covered with the upper surface plate 20, and the upper surface plate 20 has a plurality of gas exhausts arranged at the center of the battery block 2. A central recess 21 facing the outlet 12 is provided on the inner surface, and a space can be formed between the upper surface of the battery block and the central recess of the upper surface plate to form the discharge duct 6.
Thereby, a hollow duct can be formed without piping a cylindrical duct on the upper surface of the battery block. In particular, since the upper surface plate disposed on the upper surface of the battery block is used together with the discharge duct, the discharge duct can be arranged easily and at low cost by reducing the number of components while reducing the overall outer shape of the power supply device.

Moreover, according to the power supply device which concerns on a 7th side surface, the resin 22 can be filled between the upper surface of the said battery block 2, and the said upper surface plate 20, and the discharge duct 6 of a sealed structure can be formed.
Thereby, the discharge duct of a sealed structure can be provided between the upper surface of the battery block and the upper surface plate easily and reliably.

Moreover, according to the power supply device which concerns on an 8th side surface, while fixing the frame-shaped division wall 23 around the several gas exhaust port 12 arrange | positioned in the center part of the said battery block 2, The resin 22 can be filled around.
Thereby, it can prevent effectively that resin with which the upper surface of a battery block is filled flows into the gas exhaust port of a battery cell, and plugs up this gas exhaust port. Accordingly, each battery cell can reliably open the gas discharge valve and discharge the internal exhaust gas when the internal pressure rises to a predetermined pressure.
Further, since a wide portion on the upper surface of the battery block except the gas discharge port can be reliably covered with the resin, it is possible to effectively prevent a short circuit between the battery cells and improve safety.

In the power supply device according to the ninth aspect, the lateral width (W) of the central recess 21 provided on the inner surface of the upper surface plate 20 is 1.5 times or more the lateral width (d) of the partition wall 23. be able to.
As a result, the hollow discharge duct is formed in an inner shape that extends to the outside of the partition wall, so that foreign matter such as an electrolyte discharged from the gas discharge valve remains in the discharge duct. However, in the state where these foreign substances remain outside the partition wall, the outside of the partition wall is coated with resin, so that it can be reliably prevented from coming into contact with the outer can of the battery cell, and safety can be improved. .

Further, according to the power supply device according to the tenth aspect, the discharge duct 6 having a sealed structure can be formed by sealing the space between the upper surface of the battery block 2 and the upper surface plate 20 with the sealing material 27.

Moreover, according to the power supply device which concerns on a 10th side surface, the said battery cell 1 is equipped with the electrode terminal 13 in the both ends of the outer peripheral surface 10 which has provided the gas exhaust port 12, and several battery cells laminated | stacked mutually One electrode terminal 13 is connected in series or / and in parallel via a plurality of bus bars 19, and the top plate 20 is made of resin, and the plurality of bus bars 19 are insert-molded on both sides of the central recess 21. can do. Further, the power supply device may fix the bus bar 19 embedded in the upper surface plate 20 to the output terminal 13 of the battery cell 1 and fix the upper surface plate 20 at a fixed position on the upper surface of the battery block 2. it can.
This allows the top plate forming the discharge duct to be placed in a fixed position on the battery block and easily fixed

Furthermore, according to the vehicle according to the eleventh aspect, any one of the power supply devices described above can be provided.

It is a perspective view of the power supply device concerning one Example of this invention. It is a schematic block diagram of the power supply device shown in FIG. It is a perspective view of the battery block which comprises the power supply device shown in FIG. FIG. 4 is an exploded perspective view of the battery block of FIG. 3. FIG. 4 is a cross-sectional view of the battery block of FIG. 3 taken along the line VV. FIG. 4 is a cross-sectional view taken along line VI-VI of the power supply device of FIG. 3. It is an expansion perspective view of an upper surface plate. FIG. 8 is a bottom perspective view of the top plate shown in FIG. 7. It is a disassembled perspective view which shows another example of a partition wall. It is an expanded sectional view which shows another example which adheres an upper surface plate to a battery block. It is an expanded sectional view showing an example of a discharge valve. It is an expanded sectional view showing other examples of a discharge valve. It is a disassembled perspective view of the power supply device concerning one Example of this invention. It is a disassembled perspective view which shows the discharge duct and connection duct of the power supply device shown in FIG. It is a block diagram which shows the example which mounts a power supply device in the hybrid car which an engine and a motor drive | work. It is a block diagram which shows the example which mounts a power supply device in the electric vehicle which drive | works only with a motor. It is a block diagram which shows the example applied to the power supply device for electrical storage. It is a perspective view of the battery system which this inventor developed previously. It is sectional drawing of the battery system shown in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below exemplifies a power supply device for embodying the technical idea of the present invention and a vehicle including the power supply device, and the present invention includes the following power supply device and a vehicle including the power supply device. Not specified. In addition, the member shown by the claim is not what specifies the member of embodiment. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the constituent members described in the embodiments are not intended to limit the scope of the present invention only to the description unless otherwise specified. It's just an example. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation. Furthermore, in the following description, the same name and symbol indicate the same or the same members, and detailed description thereof will be omitted as appropriate. Furthermore, each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing. In addition, the contents described in some examples and embodiments may be used in other examples and embodiments.

The power supply apparatus shown below is most suitable for the power source of an electric vehicle such as a hybrid car that runs with both an engine and a motor and an electric vehicle that runs with only a motor. However, the power supply device of the present invention can be used for vehicles other than hybrid cars and electric vehicles, and can also be used for applications requiring high output other than electric vehicles.

The power supply device shown in FIGS. 1 and 2 includes a battery block 2 in which a plurality of rectangular battery cells 1 having gas discharge valves 11 are stacked and connected, and each of the rectangular battery cells 1 constituting the battery block 2. A hollow discharge duct 6 that is connected to the gas discharge port 12 of the gas discharge valve 11 and exhausts the gas discharged from the gas discharge port 12 to the outside and the discharge duct 6 disposed in the battery block 2 are connected. And a connecting duct 7 for discharging the gas flowing in from the discharge duct 6 to the outside. In FIG. 1, the plurality of battery blocks 2 are housed in an outer case 30.

The battery block 2 in FIGS. 3 to 6 has a plurality of prismatic battery cells 1 having a rectangular outer shape. The rectangular battery cell 1 has a rectangular outer can and is provided with a gas discharge valve 11 for discharging gas generated inside the outer can. The prismatic battery cell 1 has a gas discharge port 12 for discharging gas from the gas discharge valve 11 on the surface of the outer can. The battery block 2 is fixed on the outside by a battery holder 3. In the power supply device, a plurality of battery blocks 2 are arranged, and in FIG. 1, four sets of battery blocks 2 are arranged vertically and horizontally on the same surface. As shown in FIGS. 4 and 5, the rectangular battery cell 1 has a posture in which the outer peripheral surface 10 provided with the gas discharge port 12 is disposed on the same surface, and is stacked through the separator 15 to form the battery block 2. . The rectangular battery cells 1 of FIGS. 4 to 6 are stacked in a posture with the outer peripheral surface 10 provided with the gas discharge valve 11 as the upper surface. A hollow discharge duct 6 for exhausting the gas discharged from the gas discharge port 12 to the outside is provided on the upper surface of the battery block 2 so as to be connected to the gas discharge port 12 of the rectangular battery cell 1 constituting the battery block 2. ing.

As shown in FIG. 4 and the like, the rectangular battery cell 1 is a rectangular battery having a width wider than the thickness, in other words, a rectangular battery thinner than the width, and is stacked in the thickness direction to form a battery block 2. The rectangular battery cell 1 is a lithium ion secondary battery. However, the square battery cell may be a secondary battery such as a nickel metal hydride battery or a nickel cadmium battery. The square battery cell 1 in FIG. 4 is a battery having a rectangular shape with both wide surfaces, and the battery blocks 2 are laminated so that both surfaces face each other. Further, as shown in FIG. 4, the rectangular battery cell 1 is provided with a gas discharge port 12 of the gas discharge valve 11 at the center of the upper surface, and positive and negative electrode terminals 13 projecting from both ends of the upper surface. Yes.

The gas discharge valve 11 is opened when the internal pressure of the rectangular battery cell 1 becomes higher than the set pressure, thereby preventing the internal pressure from increasing. The gas discharge valve 11 incorporates a valve body (not shown) that closes the gas discharge port 12. The valve body is a thin film that is destroyed at a set pressure, or a valve that is pressed against the valve seat by an elastic body so as to open at the set pressure. When the gas discharge valve 11 is opened, the inside of the rectangular battery cell 1 is opened to the outside through the gas discharge port 12, and the internal gas is discharged to prevent the internal pressure from increasing.

Adjacent square battery cells 1 are connected in series and / or in parallel with each other by connecting positive and negative electrode terminals 13. In the battery block 2, the positive and negative electrode terminals 13 of the adjacent rectangular battery cells 1 are connected in series and / or in parallel with each other through a bus bar 19. A power supply device that connects adjacent prismatic battery cells in series can increase the output voltage by increasing the output voltage, and can connect adjacent prismatic battery cells in parallel to increase the charge / discharge current.

The battery block 2 shown in the figure has twelve prismatic battery cells 1 stacked on each other, and these prismatic battery cells 1 are connected in series and in parallel. The battery block 2 shown in the figure has twelve rectangular battery cells 1 connected in parallel in 6 series. The battery block 2 shown in the figure arranges two adjacent rectangular battery cells 1 in the same direction, and arranges these two rectangular battery cells 1 in the opposite direction, and the adjacent output terminals 13 on both sides thereof. Are connected by a bus bar 19. The bus bar 19 connects four adjacent rectangular battery cells 1 in two lines and two lines. That is, one bus bar 19 connects two prismatic battery cells 1 arranged in the same direction among the four adjacent prismatic battery cells 1 in parallel, and 2 arranged in the opposite direction adjacent thereto. The individual rectangular battery cells 1 are connected in series with each other. However, the present invention does not specify the number of rectangular battery cells constituting the battery block and the connection state thereof. The battery block can also connect all the stacked rectangular battery cells in series. Three or more can be connected in parallel.

As shown in FIGS. 4 and 5, the battery block 2 has a separator 15 sandwiched between stacked rectangular battery cells 1. The separator 15 insulates the adjacent rectangular battery cells 1. As shown in the drawing, the separator 15 can be stacked so that the adjacent rectangular battery cells 1 are not displaced as a shape in which the rectangular battery cells 1 are fitted on both sides and arranged in a fixed position. The prismatic battery cell 1 insulated and stacked by the separator 15 can have an outer can made of metal such as aluminum. The structure in which the separator 15 is sandwiched between the prismatic battery cells 1 has an effect that the separator 15 is made of a material having a low thermal conductivity such as plastic, and the thermal runaway of the adjacent prismatic battery cells 1 can be effectively prevented. is there.

A battery holder 3 that fixes the rectangular battery cell 1 in a stacked state to form a battery block 2 includes a pair of end plates 4 formed by sandwiching the battery block 2 from both end surfaces, and both ends connected to the pair of end plates 4. And a connecting fixture 5 formed as described above.

The end plate 4 is a quadrangle having the same shape and dimensions as the outer shape of the rectangular battery cell 1, and the stacked battery blocks 2 are sandwiched and fixed from both end surfaces. The end plate 4 shown in the figure is made of plastic, and reinforcing ribs extending vertically and horizontally are integrally formed on the outer surface. The end plate can be reinforced by fixing a reinforcing metal fitting. Further, the connecting fixture can be fixed to the reinforcing metal fitting. This structure is characterized in that the end plate can be reinforced with a reinforcing metal fitting to be a strong structure, and the connection fixture can be firmly connected. In particular, this structure is characterized in that the end plate can be molded from plastic to make itself strong. However, it is not always necessary to reinforce the end plate with the reinforcing metal fitting. For example, the end plate is made of metal, and the connecting fixture can be directly fixed without providing the reinforcing metal fitting.

The connection fixture 5 is made of metal such as iron, and both ends thereof are bent, and the bent portion is fixed to the end plate 4 with a set screw 18. The connecting fixture 5 shown in the figure has a plate shape along the side surface of the battery block 2. Although the plate-like connecting fixture is not shown, the opening can also be opened. However, the connection fixture may be another structure for connecting the end plates at both ends, for example, a plurality of bars.

Furthermore, the battery block 2 shown in the drawing is provided with a hollow discharge duct 6 on the upper surface thereof. The discharge duct 6 is provided to face the gas discharge ports 12 of the plurality of rectangular battery cells 1 stacked on each other. The battery block 2 shown in FIGS. 3 to 6 has an upper surface covered with an upper surface plate 20, and a discharge duct 6 is provided between the upper surface plate 20 and the upper surface of the battery block 2.

The top plate 20 is formed of insulating plastic. The insulating plastic is a plastic such as nylon resin or epoxy resin. As shown in FIGS. 5, 6, and 8, the plastic top plate is provided with a central recess 21 facing the plurality of gas discharge ports 12 disposed in the center of the battery block 2 on the inner surface thereof. Yes. The central concave portion 21 is a groove shape extending in the stacking direction of the rectangular battery cells 1 and is sized to cover the gas discharge ports 12 of all the rectangular battery cells 1 constituting the battery block 2. The upper surface plate 20 is fixed to the upper surface of the battery block 2, and a discharge duct 6 is provided in a space formed between the upper surface of the battery block 2 and the central recess 21.

Furthermore, as shown in FIGS. 5, 7, and 8, the top plate 20 is provided with a discharge portion 26 that discharges the gas inside the discharge duct 6 to one end of the discharge duct 6. . The discharge portion 26 shown in the figure is a cylindrical body that penetrates through the upper surface plate 20 and is inserted into the discharge duct 6 from the outside of the upper surface plate, and communicates the inside of the discharge duct 6 with the outside.

Further, the power supply device of FIGS. 5 and 6 has the upper surface of the battery block 2 and the lower surface of the upper surface plate 20 in order to make the discharge duct 6 formed by the upper surface of the battery block 2 and the central recess 21 sealed. The resin 22 is filled in between. This power supply device fills a molten resin between the upper surface of the battery block 2 and the upper surface plate 20, cures the resin, and forms a discharge duct 6 formed by the upper surface of the battery block 2 and the central recess 21. Has a sealed structure. The upper surface plate 20 shown in FIGS. 5 and 8 has a filling hole 25 for filling the inside of the central recess 21 with molten resin at one end of the central recess 21. The filling hole 25 is closed after filling with resin.

Furthermore, the power supply apparatus shown in FIGS. 4 to 6 prevents the molten resin filled in the upper surface of the battery block 2 from flowing into the gas discharge port 12 of the rectangular battery cell 1 and closing the gas discharge port 12. Therefore, a frame-shaped partition wall 23 is fixed around the plurality of gas discharge ports 12 arranged at the center of the battery block 2. The rectangular partition wall 23 is a rectangular battery having an elongated rectangular shape having a lateral width (d) and a length (L) in which the gas discharge ports 12 of all the rectangular battery cells 1 constituting the battery block 2 can be disposed. The cell 1 extends in the stacking direction. In order to insulate the partition wall 23 from the outer can of the rectangular battery cell 1, it is formed of an insulating plastic. In this power supply device, a frame-shaped partition wall 23 is bonded and fixed around a plurality of gas discharge ports 12 located at the center of the battery block 2, and a molten resin is filled around the partition wall 23. The region outside the partition wall 23 is resin-molded. This structure effectively prevents the resin 22 filled on the upper surface of the battery block 2 from blocking the gas discharge port 12 of the rectangular battery cell 1, while being on the upper surface of the battery block 2 and outside the partition wall 12. A wide area can be covered with the resin 22 to effectively prevent a short circuit between the rectangular battery cells 1.

Furthermore, in the power supply device shown in FIG. 6, the lateral width (W) of the central recess 21 provided on the inner surface of the top plate 20 is made wider than the lateral width (d) of the partition wall 23. In the discharge duct 6, a resin-molded insulating coating portion 24 is formed in a region outside the partition wall 23, and the insulating coating portion 24 insulates the surface of the outer can of the rectangular battery cell 1. This discharge duct 6 is located outside the partition wall 23 even when foreign matter such as electrolyte solution is discharged from the gas discharge valve 11 together with the exhaust gas due to abnormality of the rectangular battery cell 1 and is scattered in the discharge duct 6. The provided insulating coating portion 24 can effectively prevent these discharged substances from coming into contact with the outer can of the rectangular battery cell 1 and improve safety. In this discharge duct 6, the insulating cover 24 provided outside the partition wall 23 can be widened by making the width (W) of the central recess 21 wider than the width (d) of the partition wall 23. Accordingly, in the power supply device, the lateral width (W) of the central recess 21 is wider than the lateral width (d) of the partition wall 23, preferably 1.5 times or more, and more preferably about 2 times.

Furthermore, this power supply device increases the width (W) of the discharge duct 6 formed by the upper surface of the battery block 2 and the central recess 21, thereby reducing the height (H) of the discharge duct 6. The volume of 6 can be increased. In other words, the volume of the discharge duct 6 can be increased while the depth of the central recess 21 forming the discharge duct 6 is reduced to make the upper surface plate 20 thinner. As described above, the power supply device that can reduce the height (H) of the discharge duct 6 and can make the top plate 20 thin can reduce the overall height by reducing the height of the entire device.

The partition wall 23 has a frame shape that guides all the gas discharge ports 12 arranged in the center of the battery block 2 to the inside. However, as shown in FIG. 9, the partition walls can be provided separately for each gas discharge port 12 of the rectangular battery cells 1 connected in parallel to each other. Although the partition walls divided into a plurality are not shown, they can be connected to each other to form an integral structure. With this structure, a plurality of partition walls can be easily arranged at fixed positions on the upper surface of the battery block. As described above, the structure in which the partition wall 23 is divided into a plurality of portions is between the adjacent partition walls 23 and can be insulated by filling the boundary portion of the rectangular battery cell 1 having a potential difference with the resin 22. There is a feature that can improve safety. Furthermore, although not shown, in a battery block in which a plurality of rectangular battery cells are all connected in series, the partition wall can be divided for each rectangular battery cell and arranged around each gas discharge port.

With the above structure, the top plate 20 and the top surface of the battery block 2 can be easily sealed with a resin to be filled. However, as shown in FIG. 10, the power supply device can also provide a sealed discharge duct 6 by sealing the space between the upper surface of the battery block 2 and the upper surface plate 20 with a sealing material 27. The top plate 20 shown in the figure has a ring-shaped packing 27 A as a sealing material 27 around the central recess 21. The ring-shaped packing 27 A can be sandwiched between the upper plate 20 and the upper surface of the battery block 2 so that the discharge duct 6 does not leak gas. On the lower surface of the upper surface plate 20, that is, the surface facing the upper surface of the battery block 2, a packing groove 28 for arranging the packing 27A at the stop position is provided. The packing 27 A is guided by the packing groove 28 and is in close contact with the upper surface of the battery block 2. This structure can be exhausted from the discharge duct 6 to the outside without leaking the exhaust gas ejected from the gas discharge port 12 of the rectangular battery cell 1.

Furthermore, the structure in which the space between the upper surface of the battery block and the upper surface plate is closed with a sealing material does not necessarily require the packing, and the sealing material can be used as an adhesive. Although this structure is not shown, the peripheral portion of the central recess is brought into close contact with the upper surface of the battery block, and the close contact portion is adhered with an adhesive so as to prevent gas leakage.

As described above, the structure in which the upper plate 20 disposed on the upper surface of the battery block 2 is used in combination with the discharge duct 6 is simple and low-cost by reducing the number of components while reducing the overall outer shape of the power supply device. A duct 6 can be disposed. However, the power supply device of the present invention can also be used as a discharge duct by piping a cylindrical duct on the upper surface of the battery block.

Further, as shown in the cross-sectional view of FIG. 9, the plastic top plate 20 has output terminals 13 arranged at both ends of each rectangular battery cell 1 in series or in parallel along both sides of the battery block 2. A plurality of bus bars 19 to be connected to are embedded. The upper surface plate 20 in the figure is located on both sides of the central recess 21, and a plurality of bus bars 19 are embedded on opposite side portions. These bus bars 19 are inserted and embedded in the process of molding the top plate 20 with plastic. The top plate 20 shown in the figure has opening windows 20 A that expose the central portion of the bus bar 19, which is a connection portion with the output terminal 13, on the upper and lower surfaces. In other words, the upper surface plate 20 has a plurality of bus bars 19 arranged at fixed positions in a state where the outer peripheral portion of the bus bar 19 is inserted and the central portion is exposed. The bus bar 19 exposed from the opening window 20A of the top plate 20 connects the exposed portion to the output terminal 13 and connects the plurality of prismatic battery cells 1 to a predetermined connection state. The bus bar 19 embedded in the upper surface plate 20 is firmly fixed to a fixed position of the upper surface plate 20 to reinforce the upper surface plate 20. Thus, the top plate 20 in which the bus bar 19 is insert-molded is fixed to the battery block 2 via the bus bar 19 by fixing the bus bar 19 to the output terminal 13 of the rectangular battery cell 1 by welding such as laser welding. Fixed in place on the top surface.

However, it is not always necessary to embed the bus bar in the top plate. The top plate can be fixed to the top surface of the battery block after connecting a plurality of battery cells constituting the battery block to a predetermined state with the bus bar, or the bus bar is placed at a position facing the output terminal of the battery cell. After fixing the upper surface plate provided with the positioned through hole to the upper surface of the battery block, the bus bar is connected by welding or the like. The above upper surface plate is fixed to the upper surface of the battery block via a connector.

Furthermore, the power supply device shown in the cross-sectional view of FIG. 12 includes a circuit board 17 connected to the battery block 2, and the circuit board 17 is disposed on the top plate 20. The upper surface plate 20 shown in the figure is provided with a housing recess 29 for housing the circuit board 17 on the upper surface side, and the circuit board 17 is housed in the housing recess 29. The circuit board 17 is mounted with an electronic component (not shown) that realizes a protection circuit for the prismatic battery cell 1. The circuit board 17 is mounted with a voltage detection circuit that detects the cell voltage connected to each square battery cell 1, a temperature detection circuit that detects the temperature of the square battery cell 1, etc., and detects the cell voltage. Control is performed so as to prevent overcharge and overdischarge of the prismatic battery cell 1, or charge / discharge is controlled so as to prevent abnormal temperature rise of the prismatic battery cell 1. Electronic components that realize these circuits are disposed on the inner surface of the circuit board 17 and are accommodated in the accommodating recess 29.

Furthermore, the power supply device is provided with a discharge valve 8 in the discharge portion 26 of the discharge duct 6 as shown in FIG. The discharge valve 8 is opened when the internal pressure of the rectangular battery cell 1 is increased and the gas is discharged from the gas discharge valve 11 and the pressure in the discharge duct 6 is increased, so that the gas in the discharge duct 6 is discharged to the outside. Discharge. The discharge valve 8 is a check valve that opens from the inside of the discharge duct 6 to the outside and allows gas to pass therethrough, but closes from the outside to the inside. The discharge valve 8 which is a check valve is provided with connecting portions 49 at both ends, and is connected to the discharge portion 26 of the discharge duct 6 via the connecting portions 49.

1 and 2 has four battery blocks 2 arranged in two rows, and a discharge duct 6 provided on the upper surface of each battery block 2 is connected to a connecting duct 7 at the center of the power supply device. Yes. That is, the power supply device has a plurality of battery blocks 2 arranged on both sides of the connection duct 7 and connects the discharge ducts 6 arranged in each battery block 2 to the connection ducts 7 in a substantially vertical posture. The power supply device shown in the figure connects the discharge ducts 6 and the connection ducts 7 arranged in the four battery blocks 2 in an H shape. Each discharge duct 6 connects a discharge portion 26 provided at one end to a connection duct 7 via a discharge valve 8. The discharge valve 8 is disposed so as to open from the discharge duct 6 toward the connection duct 7 and allow gas to pass therethrough, but close from the connection duct 7 toward the discharge duct 8 and prevent gas from passing therethrough. The discharge valve 8 allows the gas discharged from the gas discharge valve 11 to pass through and flows into the connection duct 7 from the discharge duct 6. The connecting duct 7 exhausts the exhaust gas flowing in from the respective exhaust ducts 6 to the outside. Therefore, an external duct (not shown) that exhausts to the outside is connected to one end of the connection duct 7.

As described above, the discharge duct 6 connected to the connection duct 7 through the discharge valve 8 smoothly exhausts the gas discharged from the discharge duct 6 to the connection duct 7, while the gas flowing into the connection duct 7 is discharged. It is possible to reliably prevent backflow into the discharge duct 6. Therefore, the exhaust gas discharged from the rectangular battery cell 1 whose internal pressure has increased is smoothly exhausted from the discharge duct 6 disposed in the battery block 2 to the connection duct 7, and the gas flowing into the connection duct 7 is discharged. Inflow from the connecting duct 7 to the discharge duct 6 can be prevented. For this reason, the gas discharged from the discharge duct of a certain battery block is reliably prevented from flowing into the discharge duct of another battery block after flowing into the connection duct.

In the above power supply device, a plurality of battery blocks 2 are arranged on both sides of the connection duct 7 and a plurality of discharge ducts 6 are connected to both sides of the connection duct 7. The power supply device has a plurality of batteries on one side of the connection duct 7. It is also possible to arrange the blocks and connect the discharge ducts arranged in the respective battery blocks in a substantially vertical posture to the connection ducts.

An example of the discharge valve 8 is shown in the sectional view of FIG. The discharge valve 8 shown in this figure is provided inside a cylinder body 40 as a main body, and closes a valve seat 41 that closes the inside of the cylinder body 40 and a valve hole 42 that is opened in the valve seat 41. And a resilient body 44 that presses the valve body 43 toward the valve seat 41.

The valve seat 41 is provided inside the cylinder body 40 as a partition wall that closes the inside of the cylinder body 40. The valve seat 41, which is a partition wall, has a valve hole 42 through which the gas in the discharge duct 6 passes outside. A valve hole 42 opened in the valve seat 41 is closed by a valve body 43. The valve body 43 is shaped along the peripheral edge of the valve hole 42 and has a size capable of closing the valve hole 42. The valve body 43 is disposed on the gas discharge side of the valve seat 41 and closes the valve hole 42 in a sealed state. The valve body 43 is pressed by the elastic body 44 to close the valve hole 42. The elastic body 44 shown in the figure is a coil spring 44 A, one end of which is fixed to the valve body 43 and the other end is fixed to a support member 45 fixed inside the cylinder body 40. The elastic body 44 can specify the elastic force with which the valve body 43 presses the valve seat 41 by the spring constant of the coil spring 44 A, the total length of the spring, and the distance between the support member 45 and the valve seat 41. Furthermore, the coil spring 44A shown in the figure has a conical shape, and has a structure in which the valve body 43 can reciprocate in a predetermined direction.

The valve opening pressure of the above-described discharge valve 8 is specified by the opening area of the valve hole 42 opened in the valve seat 41 and the elastic force of the elastic body 44. The discharge valve 8 is preferably an open / close valve that opens when the pressure in the discharge duct 6 becomes higher than a predetermined pressure and closes when the pressure in the discharge duct 6 becomes lower than the predetermined pressure. When the pressure in the discharge duct 6 rises above a predetermined pressure, the discharge valve 8 moves the valve body 43 in a direction away from the valve hole 42 as shown in FIG. Open and exhaust the gas in the exhaust duct as shown by the arrows in the figure. When the gas in the discharge duct 6 is discharged and the pressure in the discharge duct 6 is lowered to a predetermined pressure, the coil spring 44A is restored to its original shape as shown in FIG. Thus, the valve hole 42 is closed to prevent gas from flowing into the discharge duct 6 from the outside.

Furthermore, the discharge valve 8 of FIG. 12 is a modification in which the elastic body 44 is a leaf spring 44B. The elastic body 44, which is a leaf spring 44 B, has one end fixed to the valve body and the other end fixed to the outer periphery of the valve seat 41. When the pressure in the discharge duct 6 rises above a predetermined pressure, the discharge valve 8 also moves the valve element 43 in a direction away from the valve hole 42 as shown in FIG. Open and exhaust the gas in the exhaust duct as shown by the arrows in the figure. When the gas in the discharge duct 6 is discharged and the pressure in the discharge duct 6 decreases to a predetermined pressure, the leaf spring 44B returns to its original shape as shown in FIG. Thus, the valve hole 42 is closed to prevent gas from flowing into the discharge duct 6 from the outside.

However, the discharge valve is not specified in the above structure. In the discharge valve, the valve body may be a sphere and the valve seat may be a cylindrical open end. The discharge valve is opened by moving the sphere when the pressure in the discharge duct increases. Furthermore, the exhaust valve can be any other check valve that has already been developed or that will be developed in the future.

In the power supply device shown in FIGS. 3 to 5, a plurality of rectangular battery cells 1 whose outer cans are made of metal are fixed to the surface of the cooling plate 35 in a thermally conductive state. This power supply device forcibly cools the cooling plate 35 and dissipates heat generated by each battery cell 1.

As shown in FIG. 6, the cooling plate 35 is provided with a refrigerant passage 36 therein, supplies liquefied refrigerant to the refrigerant passage 36, vaporizes the refrigerant in the refrigerant passage 36, and is forced by the heat of vaporization of the refrigerant. To cool the rectangular battery cell 1. Although not shown, the cooling mechanism that forcibly cools the cooling plate 35 with the heat of vaporization of the refrigerant is not shown, a compressor that pressurizes the refrigerant in a gaseous state, a condenser that cools and liquefies the gas pressurized by the compressor, And an expansion valve that supplies the refrigerant liquefied by the condenser to the refrigerant passage 36 of the cooling plate 35. This cooling mechanism supplies the liquefied refrigerant to the cooling plate 35 via the expansion valve, vaporizes the supplied refrigerant inside the cooling plate 35, and cools the cooling plate 35 with heat of vaporization. The vaporized refrigerant is pressurized by the compressor, supplied to the condenser, liquefied by the condenser, and circulated to the refrigerant passage 36 of the cooling plate 35 via the expansion valve to refrigerate the cooling plate 35.

The cooling plate is not necessarily cooled by the heat of vaporization of the refrigerant, and can be cooled by circulating a cooled liquid inside, for example. Further, the cooling plate can be cooled by providing a cooling gas passage inside and forcibly blowing the gas cooled in this passage.

In the above example, the battery cells are cooled by the cooling plate disposed on the lower surface of the rectangular battery cells. However, an air cooling system in which cooling air is blown into the gaps between the battery cells to cool them may be employed.

Further, FIGS. 13 and 14 show an example in which the discharge duct 56 disposed on the upper surface of the battery block 52 is cylindrical. As shown in the figure, the cylindrical discharge duct 56 is provided with a connection opening 54 connected to the gas discharge port 12 of each rectangular battery cell 1, and the connection opening 54 is connected to the gas discharge port 12. In the power supply device shown in the figure, packing (not shown) is arranged around the connection opening 54. The packing is an O-ring that is sandwiched between the discharge duct 56 and the opposing surface of the rectangular battery cell 1 and connects the connection opening 54 and the gas discharge port 12 with a structure that does not cause gas leakage. On the lower surface of the discharge duct 56, that is, the surface facing the rectangular battery cell 1, a packing groove (not shown) for arranging the packing at a stop position is provided. The O-ring, which is a packing, is guided by the packing groove and is brought into close contact with the opposing surface of the rectangular battery cell 1. With this structure, the exhaust gas ejected from the gas exhaust port 12 of the rectangular battery cell 1 can flow into the exhaust duct 56 and be exhausted outside without leaking. However, it is not always necessary to sandwich packing between the discharge duct and the rectangular battery cell. This is because the connection opening 54 can be connected to the gas discharge port 12 so as not to leak gas by bringing the opposing surfaces of the discharge duct 54 and the rectangular battery cell 1 into close contact with each other.

In the power supply device of FIG. 13, four sets of battery blocks 2 are arranged in two rows, and two rows of discharge ducts 56 are arranged on the upper surface. Two rows of discharge ducts 56 are connected to a connection duct 57 at the center of the power supply device, and the discharge duct 56 and the connection duct 57 are connected in an H shape. The connecting duct 57 located in the center exhausts the exhaust gas flowing in from the respective exhaust ducts 56 to the outside. Therefore, an external duct (not shown) that exhausts to the outside is connected to one end of the connection duct 57. The discharge duct 56 is open at one end and connected to the connection duct 57 and closes the other end. The discharge duct 56 flows the gas discharged from the gas discharge port 12 into the discharge duct 56 through the connection opening 54 and discharges the gas from the connection duct 57 to the outside.

Furthermore, as shown in FIG. 14, the power supply device is provided with a discharge valve 8 at a discharge portion of a discharge duct 56 disposed in each battery block 2. The discharge valve 8 opens in the direction in which the gas in the discharge duct 56 is discharged and allows the gas to pass therethrough, but closes toward the inside of the discharge duct 56. The discharge valve 8 is provided on the discharge side of the discharge duct 56 and at a connection portion with the connection duct 57. Also in this power supply device, the gas discharged from the discharge duct 56 is smoothly exhausted to the connection duct 57 via the discharge valve 8, while the gas flowing into the connection duct 57 flows back into the discharge duct 56. Can be surely prevented. Therefore, the gas discharged from the discharge duct of a certain battery block is reliably prevented from flowing into the discharge duct of another battery block after flowing into the connection duct.

The above power supply devices can be used as in-vehicle power supplies. As a vehicle equipped with a power supply device, an electric vehicle such as a hybrid vehicle or a plug-in hybrid vehicle that runs with both an engine and a motor, or an electric vehicle that runs only with a motor can be used, and it is used as a power source for these vehicles. .

(Power supply for hybrid vehicles)
FIG. 15 shows an example in which a power supply device is mounted on a hybrid vehicle that runs with both an engine and a motor. A vehicle HV equipped with the power supply device shown in this figure includes an engine 96 and a travel motor 93 that travel the vehicle HV, a power supply device 100 that supplies power to the motor 93, and a generator that charges a battery of the power supply device 100. 94. The power supply apparatus 100 is connected to a motor 93 and a generator 94 via a DC / AC inverter 95. The vehicle HV travels by both the motor 93 and the engine 96 while charging / discharging the battery of the power supply device 100. The motor 93 is driven to drive the vehicle when the engine efficiency is low, for example, during acceleration or low-speed driving. The motor 93 is driven by power supplied from the power supply device 100. The generator 94 is driven by the engine 96 or is driven by regenerative braking when the vehicle is braked to charge the battery of the power supply device 100.

(Power supply for electric vehicles)
FIG. 16 shows an example in which a power supply device is mounted on an electric vehicle that runs only with a motor. A vehicle EV equipped with the power supply device shown in FIG. 1 is a motor 93 for running the vehicle EV, a power supply device 100 that supplies power to the motor 93, and a generator 94 that charges a battery of the power supply device 100. And. The motor 93 is driven by power supplied from the power supply device 100. The generator 94 is driven by energy when regeneratively braking the vehicle EV and charges the battery of the power supply device 100.

(Power storage device for power storage)
Furthermore, this power supply apparatus can be used not only as a power source for a moving body but also as a stationary power storage facility. For example, as a power source for home and factory use, a power supply system that is charged with sunlight or midnight power and discharged when necessary, or a streetlight power supply that charges sunlight during the day and discharges at night, or during a power outage It can also be used as a backup power source for driving signals. Such an example is shown in FIG. The power supply apparatus 100 shown in this figure forms a battery unit 82 by connecting a plurality of battery packs 81 in a unit shape. Each battery pack 81 has a plurality of battery cells connected in series and / or in parallel. Each battery pack 81 is controlled by a power controller 84. The power supply apparatus 100 drives the load LD after charging the battery unit 82 with the charging power supply CP. For this reason, the power supply apparatus 100 includes a charging mode and a discharging mode. The load LD and the charging power source CP are connected to the power supply device 100 via the discharging switch DS and the charging switch CS, respectively. ON / OFF of the discharge switch DS and the charge switch CS is switched by the power supply controller 84 of the power supply apparatus 100. In the charging mode, the power controller 84 switches the charging switch CS to ON and the discharging switch DS to OFF to allow charging from the charging power supply CP to the power supply apparatus 100. Further, when charging is completed and fully charged, or in response to a request from the load LD in a state where a capacity of a predetermined value or more is charged, the power supply controller 84 turns off the charge switch CS and turns on the discharge switch DS to discharge. The mode is switched to permit discharge from the power supply apparatus 100 to the load LD. Further, if necessary, the charge switch CS can be turned on and the discharge switch DS can be turned on to supply power to the load LD and charge the power supply device 100 at the same time.

The load LD driven by the power supply device 100 is connected to the power supply device 100 via the discharge switch DS. In the discharge mode of the power supply apparatus 100, the power supply controller 84 switches the discharge switch DS to ON, connects to the load LD, and drives the load LD with the power from the power supply apparatus 100. As the discharge switch DS, a switching element such as an FET can be used. ON / OFF of the discharge switch DS is controlled by the power supply controller 84 of the power supply apparatus 100. The power controller 84 also includes a communication interface for communicating with external devices. In the example of FIG. 17, it is connected to the host device HT according to an existing communication protocol such as UART or RS-232C. Further, if necessary, a user interface for the user to operate the power supply system can be provided.

Each battery pack 81 includes a signal terminal and a power supply terminal. The signal terminals include a pack input / output terminal DI, a pack abnormality output terminal DA, and a pack connection terminal DO. The pack input / output terminal DI is a terminal for inputting / outputting signals from other pack batteries and the power supply controller 84, and the pack connection terminal DO is for inputting / outputting signals to / from other pack batteries which are child packs. Terminal. The pack abnormality output terminal DA is a terminal for outputting the abnormality of the battery pack to the outside. Furthermore, the power supply terminal is a terminal for connecting the battery packs 81 in series and in parallel.

The power supply device according to the present invention and a vehicle including the power supply device can be suitably used as a power supply device for a plug-in hybrid electric vehicle, a hybrid electric vehicle, an electric vehicle, or the like that can switch between the EV traveling mode and the HEV traveling mode. Also, a backup power supply device that can be mounted on a rack of a computer server, a backup power supply device for a wireless base station such as a mobile phone, a power storage device for home use and a factory, a power supply for a street light, etc. Also, it can be used as appropriate for applications such as a backup power source such as a traffic light.

DESCRIPTION OF SYMBOLS 100 ... Power supply device 1 ... Battery cell 2 ... Battery block 3 ... Battery holder 4 ... End plate 5 ... Connection fixture 6 ... Exhaust duct 7 ... Connection duct 8 ... Discharge valve 10 ... Outer peripheral surface 11 ... Gas exhaust valve 12 ... Gas exhaust Exit 13 ... Electrode terminal 15 ... Separator 17 ... Circuit board 18 ... Set screw 19 ... Bus bar 20 ... Top plate 20A ... Opening window 21 ... Central recess 22 ... Resin 23 ... Partition wall 24 ... Insulation coating 25 ... Filling hole 26 ... Discharge Portion 27 ... Sealing material 27A ... Packing 28 ... Packing groove 29 ... Housing recess 30 ... Exterior case 35 ... Cooling plate 36 ... Refrigerant passage 40 ... Cylindrical body 41 ... Valve seat 42 ... Valve hole 43 ... Valve body 44 ... Elastic body 44A ... Coil spring 44B ... leaf spring 45 ... support member 49 ... connection portion 52 ... battery block 54 ... connection opening 56 ... discharge duct 57 ... connection Duct 81 ... Battery pack 82 ... Battery unit 84 ... Power supply controller 85 ... Parallel connection switch 93 ... Motor 94 ... Generator 95 ... DC / AC inverter 96 ... Engine 191 ... Square battery cell 192 ... Battery block 195 ... Insulating separator 195a ... Insulating Plate portion 196 ... discharge duct EV, HV ... vehicle LD ... load CP ... charging power supply DS ... discharge switch CS ... charge switch OL ... output line HT ... host device DI ... pack input / output terminal DA ... pack abnormal output terminal DO ... pack Connecting terminal

Claims

It has an outer can and is equipped with a gas discharge valve for discharging the gas generated inside the outer can, and a gas discharge port for discharging gas from the gas discharge valve is provided on the surface of the outer can A plurality of battery blocks formed by stacking a plurality of battery cells in a posture in which the gas discharge ports are substantially flush with each other;
A hollow discharge duct disposed opposite to the gas discharge port of each battery cell constituting the battery block and exhausting the gas discharged from the gas discharge port to the outside,
A power supply device comprising: a connecting duct connected to the discharge duct disposed in the battery block and discharging the gas flowing in from the discharge duct to the outside;
The discharge duct is connected to the connection duct via a discharge valve, and the discharge valve opens from the discharge duct toward the connection duct and closes from the connection duct toward the discharge duct. Power supply.
The power supply device according to claim 1,
A plurality of battery blocks are arranged on both sides of the connection duct, and the gas flow path direction of the discharge duct disposed in each battery block is connected in a posture substantially orthogonal to the gas flow path direction of the connection duct. A power supply characterized by.
The power supply device according to claim 1,
A plurality of battery blocks are arranged on one side of the connection duct, and the gas flow path direction of the discharge duct disposed in each battery block is connected in a posture substantially orthogonal to the gas flow path direction of the connection duct. A power supply characterized by.
It has an outer can and is equipped with a gas discharge valve for discharging the gas generated inside the outer can, and a gas discharge port for discharging gas from the gas discharge valve is provided on the surface of the outer can A battery block in which a plurality of battery cells are stacked in a posture in which the gas discharge ports are substantially flush with each other;
A power supply device provided with a hollow discharge duct disposed opposite to a gas discharge port of each battery cell constituting the battery block and exhausting gas discharged from the gas discharge port to the outside,
A power supply device, wherein a discharge valve is provided in a discharge portion of the discharge duct, and the discharge valve opens from the inside to the outside of the discharge duct and closes from the outside to the inside.
The power supply device according to any one of claims 1 to 4,
The power supply apparatus according to claim 1, wherein the discharge valve is an on-off valve that opens when the internal pressure in the discharge duct rises above a predetermined pressure and closes when the internal pressure drops below a predetermined pressure.
The power supply device according to any one of claims 1 to 5,
The upper surface of the battery block is covered with an upper surface plate, and the upper surface plate is provided with a central recess on the inner surface that faces a plurality of gas discharge ports arranged in the central portion of the battery block,
A power supply device, wherein a space is formed between an upper surface of the battery block and a central recess of the upper surface plate to form a discharge duct.
The power supply device according to claim 6,
A power supply device, wherein a discharge duct having a sealed structure is formed by filling a resin between an upper surface of the battery block and the upper surface plate.
The power supply device according to claim 7,
A power supply apparatus comprising: a frame-shaped partition wall fixed around a plurality of gas discharge ports arranged in a central portion of the battery block; and a resin filled around the partition wall.
The power supply device according to claim 8, wherein
The power supply apparatus according to claim 1, wherein a width (W) of a central recess provided on an inner surface of the upper surface plate is 1.5 times or more a width (d) of the partition wall.
The power supply device according to claim 6,
A power supply apparatus comprising: a sealed duct formed by sealing a space between an upper surface of the battery block and the upper surface plate with a sealing material.
The power supply device according to any one of claims 6 to 10,
The battery cell is provided with electrode terminals at both ends of the outer peripheral surface provided with gas discharge ports, and electrode terminals of a plurality of battery cells stacked on each other are connected in series or / and in parallel via a plurality of bus bars. And
The top plate is made of resin, and the plurality of bus bars are insert-molded on both sides of the central recess,
The power supply device, wherein the bus bar embedded in the upper plate is fixed to an output terminal of the battery cell, and the upper plate is fixed at a fixed position on the upper surface of the battery block.
A vehicle comprising the power supply device according to any one of claims 1 to 11.