JP2004055449A - Module battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a module battery where an electrode tab is protected from dusts, with favorable heat dissipation performance provided. <P>SOLUTION: A space S is formed between a laminate 3 and the inner surface of a module case 4. The space S is divided into electrode tab exposed spaces S2 and S3 where electrode tabs 14 and 15 of a battery 10 are exposed, and the other space S1. The space S1 is a ventilation space S1 where outside air flows through. Thus, the electrode tabs 14 and 15 are protected from dusts while favorable heat dissipation performance is exhibited. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a module battery provided with a plurality of batteries which are sealed by covering a laminated electrode as a power generation element with an exterior film.
[0002]
[Prior art]
In recent years, while air pollution by automobile exhaust gas has become a global problem, electric vehicles powered by electricity and so-called hybrid vehicles that run by combining an engine and a motor have attracted attention. The development of high-power type batteries with high energy density and high output to be mounted has an important industrial position.
[0003]
As such a high-output battery, there is a module battery in which a number of high-energy-density, high-output batteries such as a lithium-ion battery are combined.
[0004]
2. Description of the Related Art Conventionally, in a case where a module battery is formed by combining a large number of batteries, wiring is connected to each battery in a state where many batteries are stacked in one row or a plurality of rows to form a subassembly (laminated body). (For example, JP-A-2001-114157).
[0005]
[Problems to be solved by the invention]
When a large number of batteries are combined as described above, it is necessary to dissipate heat sufficiently. However, if outside air can be ventilated inside the module case, dust and dust accumulate on the electrode terminals (positive electrode terminal and negative electrode terminal), There is a risk of causing a short circuit or the like.
[0006]
In particular, in the case of a module battery using a battery in which a power generation element is covered with an exterior film and hermetically sealed, dust and dirt are likely to accumulate because the electrode terminals (electrode tabs) are strip-shaped.
[0007]
The present invention has been made based on such a conventional technique, and an object of the present invention is to provide a module battery having good heat dissipation performance while protecting an electrode tab from dust.
[0008]
[Means for Solving the Problems]
According to the present invention, a space is provided between the laminate and the inner surface of the module case, and the space is divided into an electrode tab exposure space where the electrode tab of the battery is exposed and a space other than the electrode tab exposure space. The other space is a ventilation space through which outside air flows.
[0009]
【The invention's effect】
According to the present invention, the gap formed between the laminate and the inner surface of the module case is divided into an electrode tab exposure space where the electrode tab of the battery is exposed, and another space, and the other space is defined. Is a ventilation space through which outside air passes, so that good heat radiation performance can be exhibited while protecting the electrode tabs from dust.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0011]
First Embodiment FIGS. 1 to 9 show a first embodiment of the present invention. As shown in FIGS. 1 to 4, the module battery 1 of the first embodiment includes a stacked body 3 formed by stacking a plurality of battery holders 2 (see FIG. 6) on which a battery 10 is mounted and held, .. In the stack 3 are provided with wirings 51, 52 (including bus bars 53, 54, 55, 56). Are connected to the input / output terminals 5 and 6 in series and / or in parallel, and charge and discharge via the input / output terminals 5 and 6.
[0012]
`` Laminate ''
As shown in FIGS. 1 to 4, the laminate 3 has a basic structure in which a plurality of battery holders 2 (see FIG. 6) on which a battery 10 is placed and held are stacked in multiple stages, and in this embodiment, heat dissipation is improved. To this end, plate heat sinks 7 are laminated on the uppermost and lowermost stages, and a plate heat sink 7 is interposed between predetermined battery holders 2 and 2. Hereinafter, the “battery” and the “battery holder” that constitute the laminate 3 will be described in detail.
[0013]
"battery"
As shown in FIGS. 8 and 9, the battery 10 has a flat laminated electrode 11 as a power generating element disposed at the center of a pair of laminated films 12 and 13 as an exterior film. The two sides of the laminated electrode 11 are sandwiched between the laminated films 12 and 13, and the periphery of the laminated films 12 and 13 is joined by heat welding, thereby sealing the electrolytic solution together with the laminated electrode 11 between the laminated films 12 and 13.
[0014]
As a result, the external shape of the battery 10 is such that the portion where the laminated electrode 11 is accommodated in the central portion of the battery becomes the thick portion 10A and the joining portion of the battery peripheral portion becomes the thin portion 10B.
[0015]
The laminated electrode 11 is formed by sequentially laminating a plurality of positive electrode plates 11A and negative electrode plates 11B with a separator 11C interposed therebetween. Each positive electrode plate 11A is connected to a positive electrode tab (electrode tab) 14 via a positive electrode lead 11D. While being connected, each negative electrode plate 11B is connected to a negative electrode tab (electrode tab) 15 via a negative electrode lead 11E, and the positive electrode tab 14 and the negative electrode tab 15 are drawn out from the joint portion 10B of the laminated films 12 and 13 to the outside. Have been.
[0016]
The positive electrode tab 14 and the negative electrode tab 15 are formed of a metal foil such as Al, Cu, Ni, and Fe. In this embodiment, the positive electrode tab 14 is formed of Al and the negative electrode tab 15 is formed of Ni. In addition, the laminate films 12 and 13 are formed such that a nylon layer α as a resin layer, an adhesive layer β, an aluminum foil layer γ as a metal layer, and PE (polyethylene) or PP ( (Polypropylene) layer δ.
[0017]
"Battery material"
The module battery 1 of this embodiment is for use in a vehicle, and a high-energy-density, high-output lithium ion secondary battery is used as the battery. Hereinafter, description of the material of the lithium ion battery will be added.
[0018]
As the positive electrode active material of the positive electrode forming the positive electrode plate 11A, a lithium nickel composite oxide, specifically, a general formula LiNi _1-x MxO ₂ (where 0.01 ≦ x ≦ 0.5, M Contains at least one of Fe, Co, Mn, Cu, Zn, Al, Sn, B, Ga, Cr, V, Ti, Mg, Ca, and Sr).
[0019]
The positive electrode can also contain a positive electrode active material other than the lithium nickel composite oxide. As the positive electrode active material other than the lithium nickel composite oxide, for example, a general formula LiyMn _2-z M′zO ₄ (provided that 0.9 ≦ y ≦ 1.2, 0.01 ≦ z ≦ 0.5, and M 'Is at least one of Fe, Co, Ni, Cu, Zn, Al, Sn, B, Ga, Cr, V, Ti, Mg, Ca, and Sr.) Things. Also, a general formula LiCo _1-x MxO ₂ (where 0.01 ≦ x ≦ 0.5, and M is Fe, Ni, Mn, Cu, Zn, Al, Sn, B, Ga, Cr, V, Ti , Mg, Ca, and Sr) may be contained.
[0020]
Lithium nickel composite oxide, lithium manganese composite oxide and lithium cobalt composite oxide, for example, a carbonate such as lithium, nickel, manganese, and cobalt are mixed according to the composition, and the mixture is heated to 600 ° C. to 1000 ° C. in an oxygen-containing atmosphere. It is obtained by firing in a temperature range. The starting materials are not limited to carbonates, and can be synthesized from hydroxides, oxides, nitrates, organic acid salts, and the like.
[0021]
The average particle size of the positive electrode active material such as a lithium nickel composite oxide and a lithium manganese composite oxide is preferably 30 μm or less.
[0022]
As the negative electrode active material forming the negative electrode plate 11B, 11B, a ... a specific surface area to use a 0.05 m ² / g or more, a range of ^2m 2 / g. By setting the content in this range, formation of SEI (Solid Electrolyte Interface) on the surface of the negative electrode can be sufficiently suppressed.
[0023]
When the specific surface area of the negative electrode active material is less than 0.05 m ² / g, the place where lithium can enter and exit is too small, so that the lithium doped in the negative electrode active material during charging is discharged from the negative electrode active material during discharging. It is not sufficiently undoped, and the charge / discharge efficiency decreases. On the other hand, when the specific surface area of the negative electrode active material exceeds 2 m ² / g, formation of SEI on the negative electrode surface cannot be controlled.
[0024]
As the negative electrode active material, any material can be used as long as it is capable of doping and undoping lithium with a potential with respect to lithium of 2.0 V or less, and specifically, a non-graphitizable carbon material, Organic polymer made by firing artificial graphite, natural graphite, pyrolytic graphite, coke such as pitch coke, needle coke, petroleum coke, graphite, glassy carbon, phenolic resin and furan resin at appropriate temperature It is possible to use a carbonaceous material such as a compound fired body, carbon fiber, activated carbon, and carbon black.
[0025]
In addition, a metal capable of forming an alloy with lithium and an alloy thereof can also be used. Specifically, lithium is doped with lithium at a relatively low potential such as iron oxide, ruthenium oxide, molybdenum oxide, tungsten oxide, and tin oxide. In addition to oxides and nitrides thereof to be dedoped, nitrides thereof, group 3B typical elements, elements such as Si and Sn, or MxSi, MxSn (where M represents one or more metal elements excluding Si or Sn). ) Can be used. Among these, it is particularly preferable to use Si or a Si alloy.
[0026]
Further, as the electrolytic solution, in addition to a liquid prepared by dissolving an electrolyte salt in a non-aqueous solvent, a polymer gel electrolyte in which a solution in which the electrolyte salt is dissolved in a non-aqueous solvent is held in a polymer matrix, Is also good.
[0027]
When a polymer gel electrolyte is used as the non-aqueous electrolyte, a polymer material to be used includes polyvinylidene fluoride, polyacrylonitrile, and the like.
[0028]
As the non-aqueous solvent, any non-aqueous solvent used so far in this type of non-aqueous electrolyte secondary battery can be used, such as propylene carbonate, ethylene carbonate, 1,2-dimethoxyethane, and diethyl carbonate. Dimethyl carbonate, γ-butyrolactone, tetrahydrofuran, 1,3-dioxolan, 4-methyl-1,3-dioxolan, diethyl ether, sulfolane, methylsulfolane, acetonitrile, propionitrile and the like. One of these non-aqueous solvents may be used alone, or two or more of them may be used in combination.
[0029]
In particular, the non-aqueous solvent preferably contains an unsaturated carbonate, and specifically, preferably contains vinylene carbonate, ethyleneethylidene carbonate, ethylene isopropylidene carbonate, propylidene carbonate, and the like. Among them, it is most preferable to contain vinylene carbonate. By containing unsaturated carbonate as the non-aqueous solvent, it is considered that an effect due to the properties of SEI generated in the negative electrode active material (function of the protective film) is obtained, and the overdischarge resistance is further improved.
[0030]
Further, the unsaturated carbonate is preferably contained in the electrolyte at a ratio of 0.05% by weight or more and 5% by weight or less, particularly preferably at a ratio of 0.5% by weight or more and 3% by weight or less. Is most preferred. By setting the content of the unsaturated carbonate in the above range, a non-aqueous secondary battery having a high initial discharge capacity and a high energy density can be obtained.
[0031]
The electrolyte salt is not particularly limited as long as it is a lithium salt exhibiting ion conductivity. For example, LiClO ₄ , LiAsF ₆ , LiPF ₆ , LiBF ₄ , LiB (C ₆ H ₅ ) ₄ , LiCl, LiBr, CH ₃ SO ₃ Li, CF ₃ SO ₃ Li, and the like can be used. One of these electrolyte salts may be used alone, or two or more thereof may be used in combination.
[0032]
By using such a lithium ion secondary battery, the module battery 1 of this embodiment has a configuration suitable for mounting on a vehicle.
[0033]
"Battery holder"
As shown in FIGS. 5 to 7, the battery holder 2 is configured to be freely stacked in a plurality of stages while mounting and holding the battery 10, and includes a frame portion 21 on which the thin portion 10 </ b> B of the battery 10 is mounted. , And an opening 22 for accommodating the thick portion 10A of the battery 10.
[0034]
In the frame portion 21 of the battery holder 10, an upright wall 24 protrudes in the stacking direction of the battery holder 2 on the outer peripheral side of a mounting surface 23 on which the thin portion 10 </ b> B of the battery 10 is mounted. The height d2 of the upright wall 24 is set to be the same as the thickness d4 of the thin portion 10B of the battery 10 or higher than the thickness d4 of the thin portion 10 of the battery 10, and the front end surface 24a of the vertical wall 24 contacts the back surface of the adjacent battery holder 2. Touch Thereby, when the battery holders 2 are stacked, the batteries 10 are not compressed and are not excessively compressed even if they are compressed.
[0035]
The upright wall 24 of the frame 21 has cutouts 24c, 24c at both ends in the longitudinal direction of the battery holder 2 to expose the electrode tabs 14, 15. Thus, when the battery holders 2 are stacked in multiple stages, the battery 10 is held between the battery holders 2 and 2 adjacent in the stacking direction, and the electrode tabs 14 of the battery 10 are held between the adjacent battery holders 2 and 2. , 15 are exposed. Therefore, the connection work between the electrode tabs 14 and 15 and the connection work between the electrode tabs 14 and 15 and the wires 51 to 56 can be performed without worrying about the rigidity of the battery 10. In this embodiment, as shown in FIG. 6, the thickness d1 of the battery holder 10 is set substantially equal to the thickness d3 of the battery 10, whereby the thickness d1 of the battery holder 10 is minimized, The module battery 1 as a whole becomes compact.
[0036]
At the four corners of the mounting surface 23 of the frame portion 21, locate pins 25 projecting toward the overlapping direction of the battery holder 10 are provided, and the locate pins 25 are provided at the joints 10B of the battery 10 at the joints 10B. The battery 10 is positioned in the battery holder 2 by being fitted into the hole 16.
[0037]
Further, a locate hole 27 is formed on the back surface 26 of the battery holder 2 at a position corresponding to the locate pin 25. Therefore, when the battery holders 2 are stacked, the battery pins 2 can be stacked in multiple stages without displacement by the engagement between the locating pins 25 of the battery holder 2 on the lower side in the stacking direction and the locating holes 27 of the battery holder 2 on the upper side in the stacking direction. It has become.
[0038]
Each battery holder 2 is provided with a joint 28 having a claw 28b at the tip of a flexible arm 28a, whereby a plurality of battery holders 2 can be connected and fixed. In this embodiment, as shown in FIG. 5, four types of battery holders 2 (2A, 2B, 2C, 2D) are provided, and the configuration of the joint 28 is different from each other. Hereinafter, the battery holder 2 (2A, 2B, 2C, 2D) will be described for each type with reference to FIG.
[0039]
(A) The battery holder 2A is of a type capable of connecting and fixing the battery holder directly laminated on the upper side, and the joint 28 of the battery holder 2A is provided with the outer peripheral groove 29 of the frame portion 21 of the battery holder 2 adjacent to the upper side in the laminating direction. The length of the flexible arm 28a is set so that the claw 28b engages with the battery holder 2B. (B) The battery holder 2B is a type that can connect and fix the battery holder 2 to the upper side with the heat sink 7 interposed therebetween. The length of the flexible arm 28a of the joint 28 of the battery holder 2B is set so that the claw 28b is engaged with the outer peripheral groove 29 of the adjacent upper battery holder 2 via the heat sink 7 (C). The holder 2C is of a type to which the heat sink 7 can be connected and fixed on the upper side, and the joint 28 of the battery holder 2C is flexible so that the claw 28b is engaged with the corner of the peripheral edge of the surface of the upper heat sink 7. (D) The battery holder 2D in which the length of the arm 28a is set is a type in which the battery holder 2 directly laminated on the upper side can be connected and fixed, and the heat sink 7 can be connected and fixed on the lower side. 28, 28 are provided. One joint 28 has a length of a flexible arm 28a set such that a claw 28b is engaged with an outer peripheral groove 29 of the frame portion 21 of the battery holder 2 adjacent to the upper side in the stacking direction. The length of the flexible arm 28a is set so that the claw 28b is engaged with the corner of the peripheral edge of the rear surface of the heat sink 7 on the side.
[0040]
In this embodiment, the stacked body 3 is configured using the four types of battery holders 2 (2A, 2B, 2C, 2D) as described above. For example, as shown in FIG. The number of batteries in the stack can be freely changed by adding a battery holder 2E which is the same as that described above and is configured so that the joint position of the battery holder 2A does not interfere.
[0041]
"Module case"
As shown in FIGS. 1 to 4, the module case 4 includes a case body 41 formed in a container shape, and a lid 42 that seals an upper opening of the case body 41, and accommodates the stacked body 3. Things. A pair of ribs 43, 43 circling around the inner surface of the module case 4 is provided on the inner surface of the module case 4, and a gap S is formed between the laminated body 3 and the inner surface of the module case 4 by the ribs 43, 43. Is done. The ribs 43 include, as shown in FIGS. 2 and 4, ribs 44 provided on the case body 41 and ribs 45 provided on the lid 42.
[0042]
The cover 41 is provided with an air outlet 46 and an air outlet 47, and the outside air introduced into the gap S from the air outlet 46 is exhausted from the air outlet 47 so that the battery groups 10, 10, 10 ,... Can be dissipated. In the drawings, reference numerals 48 and 49 are wedge-shaped spacers for holding the stacked body 3 in the module case 4 without play.
[0043]
Here, in this embodiment, the laminated body 3 has a completely closed cross-sectional structure except for both ends in the longitudinal direction of the battery holder 2 where the cutout portions 24c are located, and the ribs 44 and 45 and the wedge-shaped spacers 48 and 49 are provided. The gap S is defined by the sealing member 50. More specifically, the gap S is defined by a partition wall composed of ribs 44 and 45, wedge-shaped spacers 48 and 49, and a sealing member 50, and a ventilation space S1 communicating with the outside of the module case 4 via the ventilation port 46 and the ventilation port 47. , And electrode tab exposed spaces S2 and S3 where the electrode tabs 14 and 15 are exposed.
[0044]
That is, since the electrode tab exposure spaces S2 and S3 are spaces where connection portions between the electrode tabs 14 and 15 and connection portions between the electrode tabs 14 and 15 and the wirings 51 to 56 are arranged, dust and dirt are not present. Although it is necessary to avoid dust and dust that may adversely affect the electrical contact, in this embodiment, since the compartments are separated from the ventilation spaces S2 and S3, the heat generation of the battery 10 in the stacked body 3 is efficiently performed. While radiating heat, it is possible to prevent dust and dirt from accumulating on the electrode tabs 14 and 15.
[0045]
"Assembly process"
The module battery 1 configured as described above is assembled as follows.
[0046]
First, as shown in FIG. 6, one battery 10 is placed and held on one battery holder 2. At this time, the battery 10 is positioned and held on the battery holder 2 by externally fitting the through hole 16 of the battery 10 to the locate pin 25 of the battery holder 2.
[0047]
Next, as shown in FIG. 5, the battery holder 2 on which the battery 10 is placed and held in this way and the heat sink 7 are connected and fixed in a predetermined order to form the laminate 3. In FIG. 5, the battery 10 is omitted.
[0048]
Next, the electrode tabs 14 and 15 of the battery 10 exposed from the stacked body 3 are connected to the input / output terminals 5 fixed to the lid 41 via wires 51 and 52 (including bus bars 53, 54, 55 and 56). , 6 in series and / or in parallel to form a high-power circuit. At this time, since the battery 10 is held by the battery holder 2 constituting the laminate 3, the connection work between the electrode tabs 14 and 15 and the connection between the electrode tabs 14 and 15 can be performed without concern about the fragility of the battery 10. Connection work with the wirings 51 to 56 can be performed.
[0049]
Next, as shown in FIG. 4, the laminate 3 to which the wirings 51 to 56 are connected is housed in the case main body 41, and a pair of wedge-shaped spacers is provided between the laminate 3 and the rib 43 of the case main body 41. The stack 3 is housed in the case body 41 without play by fitting the 48 and 49.
[0050]
Finally, the lid 42 is placed over the upper opening of the case body 41 and joined to obtain the desired module battery 1.
[0051]
"Effects"
The module battery 1 configured as described above has the following functions and effects.
[0052]
(1) The gap S formed between the laminate 3 and the inner surface of the module case 4 is divided by the partition walls (44, 45, 48, 49, 50) into the ventilation space S1 and the electrode tab exposure space (non-ventilation space) S2, Since it is divided into S3 and S3, it is possible to exhibit good heat dissipation performance while protecting the electrode tabs 14 and 15 of the battery 10 from dust and dirt. (2) The electrode tabs 14 and 15 are configured to be freely stacked in a plurality of stages. The battery holder 2 for placing and holding the battery 10 while exposing the battery 10 is provided. Therefore, the battery holder 2 is stacked in multiple stages without worrying about the fragility of the battery 10 and the electrode tabs 14 and 15 of the battery 10 are connected to each other. Connection work and connection work between the electrode tabs 14 and 15 and the wirings 51 to 56 can be performed. Therefore, the assembling work of the module battery 1 is facilitated. (3) While the battery holder 2 includes the locate pin 25, the battery 10 includes the through hole 16 that penetrates through the locate pin 25 of the battery holder 2. And the assembly work of the module battery 1 becomes easier. Further, since the battery 10 is held in each battery holder 2 without play, the handleability of the module battery 1 is also improved. (4) Since the battery holders 2 adjacent in the stacking direction are configured to be freely connectable, the battery holder It becomes extremely easy to assemble a laminated body 3 in which a plurality of layers 2 are laminated in multiple stages. As a result, the assembly work of the module battery 1 is further facilitated. (5) Since the plate-like heat sink 7 is interposed between the battery holders 2 adjacent in the stacking direction, heat can be efficiently radiated from the stack 3. When the heat sink 7 is hollow, the hollow portion of the heat sink 7 also serves as a ventilation channel, so that a module battery having more excellent heat dissipation can be obtained.
[0053]
Second Embodiment FIGS. 11 to 12 show a second embodiment of the present invention. The same components as those of the first embodiment are denoted by the same reference numerals, and the description of the components and the operation and effects thereof will be omitted.
[0054]
In the module battery 100 according to the second embodiment, as shown in FIGS. 11 to 12, communication as a communication portion that communicates the ventilation space S1 and the electrode tab exposure spaces S2 and S3 with the rib 45 constituting the partition wall. The first embodiment differs from the first embodiment in that an opening 101 is provided, and the communication port 101 is covered with an air filter 102.
[0055]
According to the module battery 100 of the second embodiment, the communication hole that communicates the ventilation space S1 and the electrode tab exposure spaces S2, S3 with the rib 45 constituting the partition wall (44, 45, 48, 49, 50). Since the air filter 102 is provided over the communication port 101, a further heat radiation effect can be obtained while protecting the spaces S2 and S3 from dust and dirt.
[0056]
As described above, according to the first and second embodiments, according to the present invention, a gap is provided between the laminate and the inner surface of the module case, and the gap is formed as an electrode tab exposure space where the electrode tab of the battery is exposed, Since it is characterized in that it is divided into other spaces and the other space is a ventilation space through which outside air flows, good heat radiation performance can be exhibited while protecting the electrode tabs from dust.
[0057]
In the present invention, the air outlet 46 and the air outlet 47 may of course be covered with an air filter. In the first and second embodiments, the partition wall is constituted by the ribs 44 and 45 and the wedge-shaped spacers 48 and 49. In the present invention, for example, as shown in FIGS. It may be constituted by 111 and the rib 45 of the lid 42, or may be constituted by using a sealing member as required.
[0058]
For example, as shown in FIGS. 13 and 14, the positions of the input / output terminals 5, 6 and the positions of the wedge-shaped spacers 112, 113, 114 can be changed without departing from the technical idea of the present invention. Needless to say, it is good.
[Brief description of the drawings]
FIG. 1 is a top view including a partially broken portion of a module battery according to a first embodiment of the present invention.
FIG. 2 is a side sectional view including a broken portion along the line II-II in FIG.
FIG. 3 is a side sectional view including a broken portion along the line III-III in FIG. 1;
FIG. 4 is an exploded view of the module battery.
5 is a view showing a laminate of the module battery, wherein FIG. 5A is an exploded view and FIG. 5B is an assembly view.
FIG. 6 is a view showing a battery holder in which a battery of the same module battery is placed, wherein a separation diagram a is a top view, a separation diagram b is a side view, and a separation diagram c is viewed from a direction different from that of the separation diagram b. FIG. 4 is a side view, FIG. 4D is a rear view, and FIG. 5E is a sectional view taken along line SB-SB in FIG.
FIG. 7 is a view showing a battery holder of the module battery, in which a separation diagram a is a top view, a separation diagram b is a side view, and a separation diagram c is a side view and a separation diagram viewed from a direction different from that of the separation diagram b. d is a rear view, and e is a sectional view taken along the line SA-SA in the a.
8 is a view showing a battery of the module battery, wherein FIG. 8A is a top view and FIG. 8B is a side view.
FIG. 9 is a schematic diagram showing an internal configuration of a battery of the module battery.
FIG. 10 is a view showing another example of a laminate. FIG. 11 is a view corresponding to FIG. 2 showing a module battery according to a second embodiment of the present invention.
FIG. 12 is a side view of the module battery of FIG. 11 including a partially broken portion.
FIG. 13 is a top view including a partially broken portion showing a modification of the module battery of the present invention.
FIG. 14 is a side view of the module battery of FIG. 13 including a partially broken portion.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 module battery 2 battery holder 3 laminate 4 module case 10 battery 11 laminated electrode (power generation element)
12 Laminated film (exterior film)
13 Laminating film (exterior film)
14 Positive electrode tab (electrode tab)
15 Negative electrode tab (electrode tab)
S Void S1 Ventilation space (other space)
S2 Electrode tab exposure space S3 Electrode tab exposure space

Claims (2)

A battery holder that holds one or more batteries each of which has a power generation element hermetically sealed in an exterior film, and a module case that houses a stacked body obtained by stacking the battery holders in multiple stages.
Providing a gap between the laminate and the inner surface of the module case,
The gap is divided into an electrode tab exposure space where the electrode tab of the battery is exposed, and another space,
A module battery, wherein the other space is a ventilation space through which outside air flows. The module battery according to claim 1,
The gap is provided on a partition wall that partitions the electrode tab exposure space and the ventilation space, and a communication portion communicating the electrode tab exposure space and the ventilation space is provided.
A module battery, wherein the communication part is covered with an air filter.

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