WO2013018305A1

WO2013018305A1 - Battery block

Info

Publication number: WO2013018305A1
Application number: PCT/JP2012/004635
Authority: WO
Inventors: 和貴清水; 下司　真也; 仰奥谷
Original assignee: パナソニック株式会社
Priority date: 2011-07-29
Filing date: 2012-07-20
Publication date: 2013-02-07

Abstract

A battery block comprises arrayed batteries (100) which are housed within holders (20). The batteries have openings for discharging gas produced in the batteries. The holders have tube-shaped housing sections for housing the batteries. A flat plate (30) is disposed so as to be in contact with the batteries. A lid body (50) which forms a gas discharge chamber (60) between the lid body (50) and the flat plate and into which gas discharged from the openings of the batteries flows is disposed above the flat plate. The openings of the batteries are connected to the gas discharge chamber. Affixation sections (51) extending in the axial direction are formed on the lid body. Each of the affixation sections is in contact with at least a part of the side wall of each of the holders, and thus the lid body is affixed to the holders.

Description

Battery block

The present invention relates to a battery block including a plurality of batteries that does not affect other batteries even if a problem such as heat generation occurs in the batteries.

In recent years, demand for rechargeable secondary batteries such as nickel metal hydride, nickel cadmium, and lithium ion is increasing from the viewpoint of resource saving and energy saving. Among these, lithium ion secondary batteries are characterized by high electromotive force and high energy density while being lightweight. For this reason, there is an increasing demand for power sources for driving various types of portable electronic devices such as mobile phones, digital cameras, video cameras, laptop computers, and mobile communication devices.

On the other hand, in order to reduce the amount of fossil fuel used and the amount of CO ₂ emission, there is an increasing expectation for a battery pack as a power source for driving a motor of an automobile or the like. This battery pack is configured by mounting a plurality of battery modules including one or more batteries in order to obtain a desired voltage and capacity.

In the development of the above battery module, a battery module that stores a predetermined power in a limited space such as an automobile is housed, so that downsizing of the battery module has become a big issue.

Therefore, in an assembled battery (battery module) composed of a plurality of batteries, a configuration is disclosed in which wiring for detecting connection between each battery and voltage or temperature is connected by a pattern wiring formed on a printed circuit board (for example, a patent). Reference 1). Similarly, a power supply device (battery pack) in which a plurality of power supply modules are housed in a holder case and connected via an end plate is disclosed (for example, see Patent Document 2). By providing sensor leads and power leads for connecting the power supply modules to the end plate, it is possible to reduce connection defects and reduce the size.

Also, as the capacity of the battery stored in the battery module increases, the battery itself may generate heat and become high temperature depending on the form of use. Therefore, not only the safety of the battery itself but also the safety of the battery module in which they are assembled is more important. In other words, the battery causes an increase in internal pressure due to gas generated by overcharge, overdischarge, internal short circuit or external short circuit, and in some cases, the battery outer case may burst. Therefore, in general, the battery is provided with a safety valve for degassing to release the internal gas. At this time, since the exhausted gas is present around the abnormally overheated battery, smoke may be generated, and there is a problem in reliability and safety.

Therefore, by storing a plurality of batteries in the battery chamber in the case and providing an opening in the partition wall facing the safety valve of each battery, the gas injected from the battery in an abnormal state is discharged from the discharge port through the exhaust chamber. A power supply device (battery module) configured to discharge is disclosed (for example, see Patent Document 3).

JP 2000-208118 A JP 2000-223166 A JP 2007-27011 A

However, in the battery modules shown in Patent Document 1 and Patent Document 2, when one battery abnormally generates heat and the safety valve is activated, it is not possible to suppress the influence of the heat generated from the generated battery and the influence on the surrounding batteries due to the gas to be ejected. There is a problem that each battery deteriorates in a chained manner. That is, in a battery module equipped with a plurality of batteries, there is a problem of how to suppress the influence of an abnormal battery to the minimum by suppressing expansion to surrounding batteries.

In addition, the battery module shown in Patent Document 3 is provided with an opening on the partition wall of the case so as to face the safety valve of the battery, and the ejected gas is discharged outside without filling the battery chamber. However, although a circuit board built in a resin is disclosed, there is no disclosure or suggestion of a connection method with a battery or the like. Therefore, when the surface of the battery on the side of the safety valve is connected with the connection terminal, it is unclear how to maintain the airtightness with the partition wall. In addition, it is difficult to align the safety valve of the battery and the open portion of the partition wall, and there is a problem that if the positioning is performed by the recess, a space is generated between the batteries and the size cannot be reduced. Further, since the battery and the circuit board are fixed and built in with resin, there is a problem in miniaturization of the battery module.

In order to solve such a problem, the applicant of the present application has disclosed a configuration of a battery module capable of minimizing the influence on the surrounding battery due to abnormal heat generation of the defective battery, as disclosed in Japanese Patent Application No. 2010-550963 (PCT). / JP2010 / 004485).

10 (a) to 10 (c) are diagrams showing the configuration of the battery module 1000 disclosed in the above application specification. The battery 1100 has an open part 1120 that discharges gas generated in the battery to the outside of the battery at the electrode part 1110 (positive terminal) of the battery 1100, and the housing 1060 is attached to the battery case around the electrode part 1120 of the battery 1100. The wiring board 1030 arranged in contact with the wiring board 1030 is divided into a housing part that houses the plurality of batteries 1100 and an exhaust chamber 1040 that exhausts the gas discharged from the open part 1120 of the electrode part 1120 to the outside of the housing 1060. ing. The electrode portion 1110 of the battery 1100 is connected to a connection body 1060 formed on the wiring substrate 1030, and the open portion 1120 of the electrode portion 1110 is connected to the exhaust chamber 1040 through the through hole 1050 formed in the wiring substrate 1030. Communicate.

With such a configuration, the wiring substrate 1030 is brought into contact with the battery case around the electrode portion 1016 of the battery 1100, and the open portion 1120 of the electrode portion 1110 is exhausted through the through hole 1050 formed in the wiring substrate 1030. By communicating with 1040, the discharge space of the gas ejected by opening the safety valve of the battery 1100 can be limited within the through hole 1050. As a result, the gas discharged from the opening portion 1120 of the electrode portion 1110 is discharged to the exhaust chamber 1040 through the through hole 1050 and further to the outside of the housing 1060, so that the gas to the adjacent battery 1100 is discharged. Can be prevented from entering. Further, the wiring board 1030 can significantly reduce the space required for routing power supply wiring and control wiring. As a result, it is possible to realize a battery module 1000 that is as thin and small as the battery 1100 and has high safety.

By the way, in the battery module using a large number of batteries, it is necessary to minimize the influence on the surrounding battery due to abnormal heat generation of the defective battery, and in addition to the high capacity and high output of the battery module. As a result, the heat generated by charging / discharging increases, and it is necessary to cool each battery efficiently in order to drive the battery module safely.

The present invention has been made in view of such a problem, and the main object of the present invention is to minimize the influence on the surrounding batteries due to abnormal heat generation of the defective battery, and to efficiently remove a plurality of batteries. The object is to provide a small and thin battery block that can be cooled.

The battery block according to the present invention is a battery block in which a plurality of batteries are arranged and accommodated in a holder, and the battery has an open part for discharging gas generated in the battery to the outside of the battery, The holder has a cylindrical accommodating portion for accommodating a plurality of batteries, a flat plate is disposed in contact with the battery, and is discharged from an open portion of the battery between the flat plate and the flat plate. A lid that forms an exhaust chamber into which gas flows is disposed, the open portion of the battery communicates with the exhaust chamber, and the lid has a fixed portion that extends in the axial direction. The fixed portion is fixed to the holder in contact with at least a part of the side wall of the holder.

In the battery block of the present invention, it is possible to minimize the influence on the surrounding battery due to abnormal heat generation of the defective battery, and it is possible to efficiently cool a plurality of batteries. As a result, a safe and stable small and thin battery block can be realized.

It is sectional drawing of the battery which comprises the battery block in one Embodiment of this invention. It is a disassembled perspective view of the battery assembly which comprises a part of battery block in one Embodiment of this invention. It is a disassembled perspective view of the battery block which combined the cover body with the battery assembly. It is the perspective view which showed the structure of the battery block in one Embodiment of this invention. FIG. 5 is a cross-sectional view showing a configuration of a battery block according to an embodiment of the present invention, where (a) is a cross-sectional view taken along line VV in FIG. 4, and (b) is an enlarged view of a portion 5B in (a). It is. It is a disassembled perspective view of the battery block in other embodiment of this invention. It is a perspective view of the battery block in other embodiments of the present invention. It is a perspective view of the holder in other embodiments of the present invention. It is a perspective view of the lid in other embodiments of the present invention. It is a disassembled perspective view of the battery block in other embodiment of this invention. It is a perspective view of the battery block in other embodiments of the present invention. (A) is a perspective view of the battery block disclosed in the application specification of Japanese Patent Application No. 2010-550963 (PCT / JP2010 / 004485), (b) is a cross-sectional view taken along line 10B-10B in (a), (C) is an enlarged view of 10C part of (b).

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the following embodiment. Moreover, it can change suitably in the range which does not deviate from the range which has the effect of this invention. Furthermore, combinations with other embodiments are possible.

FIG. 1 is a cross-sectional view showing a configuration of a battery 100 used in a battery block according to an embodiment of the present invention. The battery 100 used in the battery block of the present invention may be a battery that can be used alone as a power source for portable electronic devices such as notebook computers. In this case, since a high-performance general-purpose battery can be used as the battery of the battery block, it is possible to easily improve the performance and cost of the battery block.

In the present invention, the “battery block” means an assembly in which a plurality of batteries are arranged and accommodated in a holder, and is not distinguished from a battery module or the like. Therefore, the “battery block” in the present invention may be used in any form, such as one that is provided with external electrode terminals and used alone, or one that collects a plurality of battery blocks and uses them as a battery pack.

As the battery 100 used in the battery block of the present invention, for example, a cylindrical lithium ion secondary battery as shown in FIG. 1 can be used. This lithium ion secondary battery has a normal configuration, and includes a safety mechanism that releases gas to the outside of the battery when the pressure in the battery increases due to an internal short circuit or the like.

Hereinafter, a specific configuration of the battery 100 will be described with reference to FIG. In addition, the battery 100 used for the battery block of this invention is not limited to the following embodiment.

As shown in FIG. 1, an electrode group 4 in which a positive electrode 1 and a negative electrode 2 are wound through a separator 3 is housed in a battery case 7 together with a non-aqueous electrolyte (not shown). Insulating

plates

9, 10 are arranged above and below the electrode group 4, the positive electrode 1 is joined to the filter 12 via the positive electrode lead 5, and the negative electrode 2 is connected to the negative electrode terminal 6 via the negative electrode lead 6. Is joined to the bottom.

The filter 12 is connected to an inner cap 13, and the protrusion of the inner cap 13 is joined to a metal valve body 14. Furthermore, the valve body 14 is connected to a terminal plate (electrode part) 8 that also serves as a positive electrode terminal. And the terminal board 8, the valve body 14, the inner cap 13, and the filter 12 are united, and the opening part of the battery case 7 is sealed through the gasket 11.

When an internal short circuit occurs in the battery 100 and the pressure in the battery 100 increases, the valve body 14 swells toward the terminal plate 8, and when the inner cap 13 and the valve body 14 are disconnected, the current path is interrupted. Is done. When the pressure in the battery 100 further increases, the valve body 14 is broken. Thereby, the gas generated in the battery 100 passes through the through hole 12a of the filter 12, the through hole 13a of the inner cap 13, the tear of the valve body 14, and the open part 8a of the terminal plate (electrode part) 8. It is discharged outside.

In the present embodiment, the safety mechanism for discharging the gas generated in the battery 100 to the outside is not limited to the structure shown in FIG.

FIG. 2 is an exploded perspective view of a battery assembly constituting a part of the battery block in one embodiment of the present invention.

As shown in FIG. 2, a plurality of batteries 100 are arranged in a staggered manner, and each battery 100 is individually housed in a housing portion 20 a of a hollow cylindrical pipe holder 20. The plurality of pipe holders 20 are assembled and fixed to each other to constitute a holder for accommodating the battery 100.

Here, a plurality of grooves 21 extending in the axial direction are formed on the side wall of the holder formed by assembling the pipe holder 20. For example, when the battery 100 is a cylindrical battery, the side wall of the holder has a curved side surface extending in the axial direction along the side surface of the battery 100, and the side wall of the holder has the side wall of the adjacent battery 100. A plurality of groove portions 21 are formed in a portion corresponding to the boundary.

The inner peripheral surface of the pipe holder 20 has substantially the same shape as the outer peripheral surface of the battery 100, and the outer peripheral surface of the battery 100 accommodated in the accommodating portion 20a of the pipe holder 20 is in contact with the inner peripheral surface of the accommodating portion 20a. Preferably it is. Thereby, if the pipe holder 20 is comprised with material with high heat conductivity, such as aluminum, the heat_generation | fever from the battery 100 can be efficiently radiated to the pipe holder 20, for example.

A positive electrode plate 31 is disposed on one end (on the positive electrode terminal 8 side) of the battery 100 via an insulating spacer 30. The positive electrode plate 31 electrically connects the positive electrode terminals 8 of the respective batteries 100 in parallel, and is constituted by, for example, a positive electrode bus bar or a wiring board.

Further, a negative electrode plate 41 is disposed on the other end (negative electrode terminal side) of the battery 100 via an insulating spacer 40. The negative electrode plate 41 electrically connects the negative electrode terminals (battery cases) of the batteries 100 in parallel.

Next, the configuration of the battery block 200 in the present embodiment will be described with reference to FIGS. 3 and 4. Here, FIG. 3 is an exploded perspective view of the battery block 200, and FIG. 4 is a perspective view of the battery block 200.

As shown in FIG. 3, a lid 50 is disposed above the battery assembly shown in FIG. 2, and a plurality of fixing portions 51 extending in the axial direction are formed on the side wall of the lid 50. As shown in FIG. 4, the lid 50 is fixed to the holder 20 with the fixing portion 51 coming into contact with at least a part of the side wall of the holder 20. Here, the fixing portion 51 may be formed as a separate part and may be welded and bonded to the lid 50, or the fixing portion 51 and the lid 50 may be formed by integral molding.

Here, the shape, material, and the like of the fixing portion 51 are not particularly limited. For example, as shown in FIG. 3, the fixing portion 51 is preferably formed of a cylindrical member and has a shape that matches the shape of the groove portion 21. Thereby, the fixing | fixed part 51 can be stuck more closely and it can be made to fit in the groove part 21. FIG. In order to fix the lid 50 to the holder 20, in addition to the method of press-fitting the fixing portion 51 into the groove portion 21, for example, the method of press-fitting the fixing portion 51 into the groove portion 21, or the fixing portion 51 to the groove portion 21. A method of bonding or welding can be used.

FIG. 5 is a cross-sectional view showing the configuration of the battery block 200 in the present embodiment. FIG. 5A is a cross-sectional view taken along the line VV in FIG. 4, and FIG. 5B is an enlarged view of a part 5B.

As shown in FIG. 5 (a), a plurality of batteries 100 are arranged and accommodated in the holder 20, and the battery 100 has an electrode portion (positive electrode terminal) of the battery 100 as shown in FIG. 5 (b). 8 has an opening 8 a that discharges the gas generated in the battery 100 to the outside of the battery 100.

A spacer 30 and a positive electrode plate 31 are disposed at one end in the axial direction of the holder 20 in contact with one end on the electrode unit 8 side of the battery 100, and a lid 50 is disposed above the positive electrode plate 31. Between the lid 50 and the positive electrode plate 31, an exhaust chamber 60 into which gas discharged from the open portion 8 a of the electrode portion 8 flows is formed.

Here, the open portion 8 a of the electrode portion 8 communicates with the exhaust chamber 60 through the through hole 33 formed in the spacer 30 and the positive electrode plate 31, and the gas discharged from the open portion 8 a of the electrode portion 8. Is discharged to the exhaust chamber 60 and further discharged to the outside from the opening 50 a formed in the lid 50.

Here, since the spacer 30 and the positive electrode plate 31 are disposed in close contact with one end of the battery 100 on the electrode portion 8 side, the accommodating portion 20a is hermetically sealed by the spacer 30 and the positive electrode plate 31. For this reason, the gas discharged from the open portion 8a of the battery 100 into the exhaust chamber 60 does not return to the housing portion 20a again.

With such a configuration, it is possible to limit the discharge space of the gas ejected from the open portion 8a of the electrode portion 8, so that the gas discharged into the exhaust chamber 60 can enter the housing portion 20a of the adjacent battery 100 again. Can be prevented. Thereby, the thermal influence on the surrounding battery 100 by the abnormal heat generation of the battery 100 which produced the malfunction can be suppressed to the minimum.

Further, if the lid 50 and the fixing portion 51 are made of a material having high thermal conductivity, for example, a metal such as aluminum, the heat radiated from the battery 100 to the holder 20 is passed through the fixing portion 51. The lid 50 can be dissipated. Thereby, the some battery 100 which comprises the battery block 200 can be cooled efficiently.

Further, since the groove portion 20 into which the fixing portion 51 is fitted is in a dead space generated when a plurality of batteries 100 are arranged, even if the fixing portion 51 is fitted in the groove portion 20, the battery block 200 is substantially The typical volume is almost unchanged. Therefore, the lid 50 can be fixed to the holder 20 without reducing the energy density of the battery block 200. In order to suppress a decrease in energy density, it is preferable that the diameter of the fixed portion 51 is set to be approximately the same as the depth of the groove portion 20.

The fixing portion 51 does not need to be fitted into all the groove portions 20 formed on the side wall of the holder 20, and the position and the number of fitting portions are determined appropriately according to the required fixing strength, etc. 50 may be installed.

6 and 7 are diagrams showing a configuration of a battery module 210 according to another embodiment of the present invention. FIG. 6 is an exploded perspective view of the battery module 210. FIG. 7 is a perspective view of the battery module 210. .

As shown in FIG. 6, the battery module 210 in the present embodiment is obtained by connecting two

battery blocks

200A and 200B, and includes a lid 50 common to the two

battery blocks

200A and 200B. Then, as shown in FIG. 7, the lid 50 applies the plurality of fixing portions 51 formed on the side walls of the lid 50 to at least a part of the side walls of the

holders

20A and 20B of the battery blocks 200A and 200B. In contact therewith, the

holders

20A and 20B are fixed. For example, as shown in FIG. 6, if the fixing portion 51 is formed of a cylindrical member, the shape matches the shape of the groove portion 21, and the fixing portion 51 can be fitted more closely to the groove portion 21.

With such a configuration, a common exhaust chamber 60 can be formed in the lid 50 for each of the battery blocks 200A and 200B, and thereby abnormal heat generated in the battery 100 in the

battery block

200A or 200B. Can minimize the influence on the battery 100 in the adjacent battery block 200B.

Further, since the two

battery blocks

200A and 200B are fixed by the common lid 50, the connection between the battery blocks 200A and 200B can be further strengthened.

Furthermore, if the lid 50 and the fixing portion 51 are made of a material having high thermal conductivity, for example, a metal such as aluminum, the heat radiated from the battery 100 to the holder 20 is further passed through the fixing portion 51. The lid 50 can be radiated. Thereby, the some battery 100 which comprises the battery module 210 can be cooled efficiently. As a result, a safe and stable small and thin battery module 210 can be realized. In addition, during normal use, the batteries housed in the battery blocks 200A and 200B can be made uniform in temperature by the heat conduction of the common lid 50, so that variations in battery characteristics can be suppressed.

As mentioned above, although this invention has been demonstrated by suitable embodiment, such description is not a limitation matter and of course various modifications are possible. For example, in the above embodiment, the holder that accommodates the plurality of batteries 100 is configured by assembling the plurality of pipe holders 20, but as shown in FIG. You may comprise with the block which has 20a. At this time, for example, when the battery 100 is a cylindrical battery, the side wall of the holder 20 has a curved side surface 20 b extending in the axial direction along the side surface of the battery 100. A plurality of groove portions 21 are formed on the side wall of the holder 20 at portions corresponding to the boundaries between the adjacent batteries 100.

Moreover, in the said embodiment, although the fixing | fixed part 51 formed in the side wall of the cover body 50 was extended and formed in the axial direction at the holder 20, the fixing | fixed part 51a extended to the holder 20 side is shown in FIG. In addition, you may form so that it may have the fixing | fixed part 51b extended also on the opposite side to the holder 20. FIG. If the lid 50 having such fixing

parts

51a and 51b is used, the battery blocks 200 are stacked in the axial direction, the lower battery block 200 is fixed by the fixing part 51a, and the upper battery block 200 is fixed by the fixing part 51b. The battery blocks 200 that have been stacked can be easily connected by fixing with.

Moreover, in the said embodiment, although the fixing | fixed part 51 formed in the side wall of the cover body 50 was made into the cylindrical member, as shown in FIG.10 and FIG.11, it comprises with the plate member which has a curved side surface. Also good. Here, FIG. 10 is an exploded perspective view of a battery block 220 according to another embodiment of the present invention, and FIG. 11 is a perspective view of the battery block 220 according to another embodiment of the present invention.

As shown in FIG. 10, the side wall of the holder 20 has a curved side surface 22 extending in the axial direction along the side surface of the battery, and the fixing portion 52 formed on the side wall of the lid body 50 The plate member is formed continuously along the curved side surface 22. As a result, the lid 50 is fixed to the holder 20 by the fixing portion 52 being fitted to the curved side surface 22 of the holder 20. As shown in FIG. 10, if the groove portion 53 formed on the fixed bottom 52 and the groove portion 21 formed on the side wall of the holder 20 are further fitted, the fixing portion 52 is brought into closer contact with the groove portion 21. Can be fitted. Further, if the fixing portion 52 is integrally formed so as to form the side wall of the lid 50, the lid 50 can be easily fixed to the holder 20.

Moreover, in the said embodiment, although the exhaust chamber 60 formed in the cover body 50 was divided by the spacer 30 and the positive electrode plate 31, as shown to Fig.5 (a), it is not limited to this, Battery 100 May be defined by a flat plate disposed in contact with one end of the electrode portion. Here, the flat plate may be in any form as long as the accommodating portion 20a is hermetically sealed. For example, when the flat plate is formed of an elastic member, the side wall of the lid 50 is a peripheral portion of the flat plate. By pressing to the sealing portion, the sealing property of the accommodating portion 20a can be further improved.

In the above embodiment, the open portion 8a is formed in the electrode portion 8, but is not limited thereto, and may be formed in a part of the battery case, for example.

Here, the “flat plate” in the present invention is not necessarily limited to a flat plate, and may be a flat plate as a whole even if there are irregularities according to the shape of the battery case 7, for example. The flat plate may be configured as a wiring board.

In addition, the “sealed state” in the present invention does not necessarily mean a completely sealed state, but also includes a sealed state in which a gas that does not have an influence returns from the exhaust chamber 60 to the housing portion 20a.

In the above embodiment, the battery 100 is a lithium ion secondary battery, but other secondary batteries (for example, nickel metal hydride batteries) may be used.

In the above embodiment, the plurality of batteries 100 are arranged in a staggered manner, but other arrangements may be used.

Moreover, in the said embodiment, although the example of the battery block which arranged and accommodated the some battery in the holder was shown, it is not limited to this, The battery block which accommodated one battery in the holder may be sufficient. . In this case, the holder has a cylindrical accommodating portion that accommodates one battery, the holder is formed with a groove portion extending in the axial direction, and the lid body is formed with a fixing portion extending in the axial direction. The body is fixed to the holder with the fixing portion fitted into the groove portion. For example, when the battery is formed of a cylindrical battery, the groove may be formed in the corner of the holder along the axial direction if the housing is cylindrical and the holder is prismatic.

The present invention is useful as a power source for driving automobiles, electric motorcycles, electric playground equipment and the like.

1 Positive electrode
2 Negative electrode
3 Separator
4 Electrode group
5 Positive lead
6 Negative lead
7 Battery case
8 Terminal board (electrode part)
8a Open part
9, 10 Insulation plate
11 Gasket
12 Filter
13 Inner cap
14 Disc
20 Pipe holder (holder)
20a receiving part
20b side
21 Groove
30 Spacer (flat plate)
31 Positive electrode plate (flat plate)
33 Through hole
41 Negative electrode plate
50 lid
50a opening
51, 52 Fixed part
60 exhaust chamber
100 batteries
200, 220 battery block
210 Battery module

Claims

A battery block in which a plurality of batteries are arranged and accommodated in a holder,
The battery has an open part for discharging the gas generated in the battery to the outside of the battery,
The holder has a cylindrical accommodating portion that accommodates the plurality of batteries,
A flat plate is disposed in contact with the battery,
Above the flat plate, a lid that forms an exhaust chamber into which gas discharged from the open portion of the battery flows is disposed between the flat plate,
The open part of the battery communicates with the exhaust chamber,
A fixing portion extending in the axial direction is formed on the lid,
The lid body is a battery block in which the fixing portion is fixed to the holder in contact with at least a part of a side wall of the holder.
A groove extending in the axial direction is formed on the side wall of the holder,
The fixing portion is made of a cylindrical member,
2. The battery block according to claim 1, wherein the lid is fixed to the holder by fitting the fixing portion to a groove of the holder.
The battery comprises a cylindrical battery,
The side wall of the holder has a curved side surface extending in the axial direction along the side surface of the battery,
The battery block according to claim 2, wherein the groove formed in the side wall of the holder is provided at a portion corresponding to a boundary between the adjacent batteries.
The battery block according to claim 1, wherein the fixing portion is formed integrally with the lid.
The battery comprises a cylindrical battery,
The side wall of the holder has a curved side surface extending in the axial direction along the side surface of the battery,
The fixing portion is composed of a plate member formed continuously along the curved side surface of the holder,
2. The battery block according to claim 1, wherein the lid is fixed to the holder by fitting the fixing portion to a curved side surface of the holder.
The battery block according to claim 5, wherein the fixing portion forms a side wall of the lid.
The battery block according to claim 1, wherein the holder, the lid, and the fixing portion are made of metal.
2. The battery block according to claim 1, wherein the holder is configured by a plurality of cylindrical pipe holders in which the plurality of batteries are individually accommodated.
The battery block according to claim 1, wherein the housing portion is hermetically sealed by the flat plate.
2. The battery block according to claim 1, wherein the lid is fixed to the holder by the fixing portion being bonded, welded, or press-fitted to at least a part of a side wall of the holder.
The battery block according to claim 1, wherein the lid is formed with an opening for discharging the gas discharged into the exhaust chamber from the exhaust chamber to the outside.
The battery block according to claim 1, wherein the flat plate is configured by a wiring board in which the plurality of batteries are connected in parallel.
A battery module in which a plurality of battery blocks according to claim 1 are connected,
A common lid for the plurality of battery blocks;
The said cover is a battery module fixed to each said holder by contact | abutting the fixing | fixed part formed in this cover to at least one part of the side wall of each holder of the said battery block.
A battery block in which a battery is housed in a holder,
The battery has an open part for discharging the gas generated in the battery to the outside of the battery,
The holder has a cylindrical accommodating portion that accommodates the battery;
A flat plate is disposed in contact with the battery,
Above the flat plate, a lid that forms an exhaust chamber into which gas discharged from the open portion of the battery flows is disposed between the flat plate,
The open part of the battery communicates with the exhaust chamber,
A fixing portion extending in the axial direction is formed on the lid,
The lid is a battery block in which the fixing portion is fixed to the holder by abutting at least a part of a side wall of the holder.