JP2009193692A - Battery housing tray, and assembled-battery housing tray using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery housing tray in which even if a battery having a failure has a fire or blows out, it does not affect on other batteries in the surroundings, and to provide an assembled-battery housing tray using the same. <P>SOLUTION: The battery housing tray 100 is provided with a housing member 110 having an outer peripheral frame 115 and a bottomed face and a barrier rib member 120 which individually separates the batteries 130 in the housing member 110, and the height of the barrier rib member 120 exceeds 50% of the height of the batteries 130 and is less than the height of the outer peripheral frame 115 of the housing member 110. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention provides a battery storage tray capable of safely storing a plurality of batteries without affecting other batteries even if a problem such as heat generation occurs in the battery due to factors such as troubles in manufacturing equipment in the manufacturing process of the plurality of batteries. The present invention relates to an assembled battery storage tray using the same.

  In recent years, demand for secondary batteries such as nickel metal hydride, nickel cadmium, and lithium ion that can be repeatedly used is increasing from the viewpoint of resource saving and energy saving. Lithium-ion secondary batteries, among other things, are lightweight but have high electromotive force and high energy density, so they can be used in various types of mobile phones, digital cameras, video cameras, laptop computers, and so on. There is an increasing demand for power sources for driving portable electronic devices and mobile communication devices.

  Generally, in the manufacturing process of a secondary battery, after manufacturing in the form of a battery, it is commercialized after passing through various processing steps in order to obtain the characteristics of the battery. At that time, an initial charge / discharge process, an aging process, shipping charge / discharge, and the like are performed as the processing process. As a result, a minor internal short-circuit of the battery and the function of the parts constituting the battery are inspected, and a high-performance and highly reliable secondary battery is supplied. These processing steps are performed by storing a plurality of batteries in a tray in consideration of productivity and the like.

  However, in the above processing step, an internal short circuit may occur in the battery, or an abnormal voltage may be applied to the battery due to a failure of the charge / discharge tester. In this case, the batteries generate abnormal heat or release gas due to a sudden increase in the internal pressure of the battery. At that time, the operation of the safety mechanism provided in the battery may not catch up, and in rare cases, rupture or ignition may be induced.

  Therefore, in the charge / discharge process, an example is disclosed in which a battery stored in a tray is monitored with an infrared monitor, and a battery that has generated abnormal heat is identified and discharged (see, for example, Patent Document 1).

In addition, when a failure occurs in the battery stored in the tray during the charge / discharge process or aging process, an abnormality is detected by an odor sensor, a temperature sensor, etc., and an inert gas or a fire extinguishing agent is ejected for each device including the tray. And the example which prevents the ignition of a battery and the chain of explosion is disclosed (for example, refer patent document 2, 3).
Japanese Patent Laid-Open No. 10-281881 JP-A-11-169475 JP 2003-190312 A

  In the temperature measurement device shown in Patent Document 1, when the secondary battery stored in the tray generates heat, it is possible to discharge the generated battery and prevent the influence on other batteries. However, there is no description regarding preventing the influence of other batteries when the battery is abnormally heated and ignites or ruptures.

  Moreover, in patent document 2 and patent document 3, when a defective battery ignites or ruptures in a battery storage or a chamber space where a charge / discharge test is performed, the battery storage or the chamber space is filled with a fire extinguishing agent to extinguish the fire. It is. For this reason, a normal battery existing in the battery storage or the chamber space must be discarded, or if it is not discarded, a regeneration process or the like is required. Furthermore, there is a problem that all of the battery storage and the charge / discharge device in the chamber space cannot be used. In addition, it is necessary to extinguish the fire while the fire source is small because it may exceed the fire extinguishing capacity of the equipment.

  The present invention solves the above problems, and provides a battery storage tray that does not affect other surrounding batteries even if a defective battery is ignited or ruptured, and an assembled battery storage tray using the battery storage tray The purpose is to do.

  In order to achieve the above object, the battery storage tray of the present invention is provided with a first partition member for individually separating the batteries on one surface of the storage member, and corresponds to the first partition member on the other surface of the storage member. A second partition member provided at a position, the second partition member has a vent hole in a direction along the surface of the other surface of the storage member, and the height of the first partition member and the height of the second partition member The sum is equal to or higher than the height of the battery.

  With this configuration, it is possible to disperse the flame ejected from the exhaust hole of the defective battery in the space on the first partition member, and to prevent the surrounding batteries from being burned out or abnormally overheated.

  Moreover, the assembled battery storage tray of this invention has the structure which laminates | stacks the said battery storage tray and stores a battery. As a result, the battery is accommodated in the space sealed by the lower first partition member and the upper second partition member, and the flame blown from the exhaust hole of the defective battery through the vent hole of the second partition member. Can be ejected. As a result, it is possible to realize a safe and highly reliable assembled battery storage tray that can reliably prevent the surrounding batteries from burning or abnormally overheating.

  ADVANTAGE OF THE INVENTION According to this invention, even if a malfunctioning battery ignites or ruptures, the battery storage tray excellent in safety | security which does not affect a surrounding battery and an assembled battery storage tray using the same are realizable.

  According to a first aspect of the present invention, a first partition member is provided on one surface of the storage member to individually separate the batteries, and a second partition wall is provided at a position corresponding to the first partition member on the other surface of the storage member. The second partition member has a vent hole in a direction along the surface of the other surface of the storage member, and the sum of the height of the first partition member and the height of the second partition member is the height of the battery. The structure which is more than that.

  With this configuration, it is possible to disperse the flame ejected from the exhaust hole of the defective battery in the space on the first partition member, and to prevent the surrounding batteries from being burned out or abnormally overheated.

  According to a second aspect of the present invention, in the first aspect, the height of the first partition member exceeds 50% of the height of the battery. Thereby, even if a battery storage tray is used independently, a safe battery storage tray is realizable.

  According to a third aspect of the present invention, in the first and second aspects, a through hole smaller than the shape of the battery is provided at a position where the battery is stored between the first partition members of the storage member. Thereby, a charging / discharging test etc. can be efficiently implemented in the state which stored the battery in the battery storage tray.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the first partition member and the second partition member are provided so as to be separable from the storage member. Thereby, a highly versatile battery storage tray that can be optimally combined according to the shape of the battery can be realized.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the storage member, the first partition member, and the second partition member have a structure in which a metal material is covered with an insulating resin. Thereby, the deformation | transformation by high temperature can be prevented and a safer battery storage tray can be realized.

  According to a sixth aspect of the present invention, in any one of the first to fifth aspects, a rib portion is provided at least on the inner surface side of the storage member and the first partition wall member. Thereby, while the storage position of a battery is prescribed | regulated reliably, the space | interval with a surrounding battery can be hold | maintained uniformly.

  According to a seventh aspect of the present invention, in any one of the first to sixth aspects, a rib portion is provided on one surface of the storage member that stores the battery between the first partition members. Thereby, the temperature drop of the bottom surface of the battery can be reduced, and the temperature of the entire battery can be kept uniform. Furthermore, by forming a circulation channel such as air, the ambient temperature of the battery can be made uniform in the aging process or the like.

  According to an eighth aspect of the present invention, in any one of the first to seventh aspects, the first partition member is provided with a first concave portion or a first convex portion, and corresponds to the first concave portion or the first convex portion. It has the structure which provided the 2nd convex part or the 2nd recessed part in the 2nd partition member of a position. Thereby, lamination | stacking of a battery storage tray is made easy, and a lateral shift etc. can be prevented reliably. Furthermore, the airtightness of the space formed by the first partition member and the second partition member can be improved, and the propagation of flame through the contact surface can be effectively prevented.

  According to a ninth aspect of the present invention, the battery storage trays are stacked to store the batteries. Thereby, even if battery storage trays are stacked in multiple stages, it is possible to realize a safe and highly reliable assembled battery storage tray that is unlikely to cause burning.

  According to a tenth aspect of the present invention, in the ninth aspect, a first battery storage tray having a first partition member and a second partition member, a second battery storage tray having a first partition member and a second partition member, At least, the position of the first partition member and the second partition member of the first battery storage tray and the position of the first partition member and the second partition member of the second battery storage tray are provided at different positions. Have. As a result, the distance between the stacked batteries is increased, thereby preventing an influence on ignition or rupture directly above.

  In an eleventh aspect of the present invention, in the tenth aspect, the second battery storage tray has only the first partition member. Thereby, the collective battery storage tray of the stable multistage stack structure is obtained. Moreover, the storage volume of the assembled battery storage tray can be reduced.

  According to a twelfth aspect of the present invention, in any one of the ninth to eleventh aspects, a lid member having a second partition member is further provided at a position corresponding to the first partition member of the first battery storage tray. It was. Thereby, since the opening part of an assembled battery storage tray can be sealed, the influence on another assembled battery storage tray can be reduced significantly.

  Hereinafter, embodiments of the present invention will be described with the same reference numerals given to the same portions with reference to the drawings. The present invention is not limited to the contents described below as long as it is based on the basic characteristics described in this specification. In the following, a non-aqueous electrolyte secondary battery such as lithium ion (hereinafter referred to as “battery”) will be described as an example of the battery, but it goes without saying that the present invention is not limited thereto.

(Embodiment 1)
1 is a cross-sectional view of a battery stored in a battery storage tray according to Embodiment 1 of the present invention.

  As shown in FIG. 1, a cylindrical battery has, for example, a positive electrode 1 provided with a positive electrode lead 8 made of aluminum, and a negative electrode 2 provided with one end of a negative electrode lead 9 made of copper, for example, facing the positive electrode 1. 3, the electrode group 4 is wound. Then, the insulating plates 10a and 10b are mounted on the upper and lower sides of the electrode group 4 and inserted into the battery case 5, the other end of the positive electrode lead 8 is used as the sealing plate 6, and the other end of the negative electrode lead 9 is used as the battery case 5. Weld to the bottom. Further, a non-aqueous electrolyte (not shown) that conducts lithium ions is injected into the battery case 5, and the open end of the battery case 5 is connected to the positive electrode cap 16, the current blocking member 18 such as a PTC element, and the like via the gasket 7 and The sealing plate 6 is caulked. Further, the positive electrode cap 16 is provided with an exhaust hole 17 for extracting gas generated by opening the vent mechanism 19 due to a failure of the electrode group 4. And the positive electrode 1 is comprised from the positive electrode collector 1a and the positive electrode layer 1b containing a positive electrode active material.

Here, the positive electrode layer 1b includes, for example, lithium-containing composite oxide such as LiCoO ₂ , LiNiO ₂ , Li ₂ MnO ₄ , or a mixture or composite compound thereof as a positive electrode active material. The positive electrode layer 1b further includes a conductive agent and a binder. Examples of the conductive agent include natural graphite and artificial graphite graphite, acetylene black, ketjen black, channel black, furnace black, lamp black, thermal black, and other carbon blacks, and binders include, for example, PVDF, poly Including tetrafluoroethylene, polyethylene, polypropylene, aramid resin, polyamide, polyimide and the like.

  As the positive electrode current collector 1a used for the positive electrode 1, aluminum (Al), carbon, conductive resin, or the like can be used.

As the non-aqueous electrolyte, an electrolyte solution in which a solute is dissolved in an organic solvent, or a so-called polymer electrolyte layer containing these and non-fluidized with a polymer can be applied. As the solute of the non-aqueous electrolyte, LiPF ₆ , LiBF ₄ , LiClO ₄ , LiAlCl ₄ , LiSbF ₆ , LiSCN, LiCF ₃ SO ₃ , LiN (CF ₃ CO ₂ ), LiN (CF ₃ SO ₂ ) _2, etc. should be used. Can do. Furthermore, as the organic solvent, for example, ethylene carbonate (EC), propylene carbonate, butylene carbonate, vinylene carbonate, dimethyl carbonate (DMC), diethyl carbonate, ethyl methyl carbonate (EMC) and the like can be used.

  The negative electrode current collector 11 of the negative electrode 2 is made of a metal foil such as stainless steel, nickel, copper, or titanium, or a thin film of carbon or conductive resin.

Further, the negative electrode layer 15 of the negative electrode 2 has a theoretical capacity density of 833 mAh / cm ³ for reversibly occluding and releasing lithium ions such as carbon materials such as graphite, silicon (Si), tin (Sn), and the like. More negative electrode active materials can be used.

  Hereinafter, the battery storage tray in Embodiment 1 of this invention is demonstrated in detail using FIG.

  FIG. 2A is a perspective view of the battery storage tray according to Embodiment 1 of the present invention, and FIG. 2B is a cross-sectional view taken along line AA of FIG. In FIG. 2B, in order to help understanding, a cylindrical battery shown in a perspective view is shown in a state of being accommodated.

  As shown in FIG. 2A, the battery storage tray 100 includes a first partition member 120 provided on one surface 114 of a storage member 110 made of an insulating resin material such as polyprolene resin, and the storage member 110. A second partition wall member 122 made of an insulating resin material such as polyprolene resin provided on the other surface 116 is integrally formed with the storage member 110.

  Further, as shown in FIG. 2B, the second partition wall member 122 is provided with a vent hole 125 in a direction along the surface of the other surface 116 of the storage member 110. This vent hole 125 will be described in detail in the following embodiment, but when a plurality of battery storage trays are stacked, the gas ignited from the exhaust hole due to the opening of the vent mechanism of the defective battery or the gas accompanying the rupture is ignited. It has a function to discharge the flame caused by. And the 1st partition member 120 and the 2nd partition member 122 are provided facing the same position on both sides of the storage member 110. Furthermore, the sum of the height K1 of the first partition member 120 and the height K2 of the second partition member 122 is set to be equal to or greater than the height D (distance between the positive electrode cap and the battery case bottom surface) of the battery 130 to be stored. At this time, when the battery storage tray 100 is used alone, it is preferable that the height K1 of the first partition member 120 is higher than 50% of the height of the battery 130. For example, when the height of the battery 130 is 65 mm, the height of the first partition wall member 120 exceeds 32.5 mm.

  As shown in FIG. 2B, in the present embodiment, an example in which an outer peripheral frame 115 higher than the height K1 of the first partition member 120 is provided on the outer periphery of the one surface 114 of the storage member 110 is shown. However, it is not limited to this. For example, the height T of the outer peripheral frame 115 may be the same height as the height K1 of the first partition member 120. In this case, it is preferable to provide an outer peripheral frame (not shown) having the same height as the height K <b> 2 of the second partition wall member 122 on the outer periphery of the other surface 116 of the storage member 110.

  With the above configuration, as shown in FIG. 2B, when the battery storage tray is used alone, the plurality of batteries 130 includes the first partition member 120 and the battery having a height exceeding 50% of the height of the battery 130. The battery is stored in the battery storage tray 100 including the outer peripheral frame 115 having a height exceeding 130.

  The present invention is based on the knowledge that when the height of the first partition member 120 is 50% or less of the battery 130, the surrounding battery is burnt down due to ignition or rupture of the defective battery. Further, by setting the height of the outer peripheral frame 115 of the storage member 110 to be higher than the height of the battery, when a plurality of battery storage trays are used in a stacked manner, the energy of the ignition or rupture of the battery is used for the first partition member 120. And the second partition wall member 122 is released into the space formed, and the accumulation of heat can be dissipated through the vent hole 125 to prevent the surrounding battery from being ignited or smoked.

  When the battery storage tray is used alone, the height K1 of the first partition member 120 is particularly preferably 80% or more of the height D of the battery 130. This is because the heat insulation effect by the partition member can be increased.

Here, in the said embodiment, although the material of the storage member, the 1st partition member, and the 2nd partition member was demonstrated to the polypropylene resin as an example, it is not restricted to this. For example, phenol resin, unilate, glass epoxy resin, ceramic or foamed resin may be used. At this time, it is preferable to contain fillers, such as carbon fiber and glass fiber, in the said resin. This can prevent the strength of the housing member, the first partition member, and the second partition member from decreasing due to the heat contained in the defective battery and the high temperature generated during ignition, and maintain the shape. That is, when the shape cannot be maintained, the defective battery tends to fall toward the surrounding batteries. This is because the influence of ignition or heat generation on the surrounding batteries is increased, and it is possible to reduce the possibility of similar firing. Further, an endothermic agent such as magnesium hydroxide (Mg (OH) ₂ ) may be added to the resin. Thereby, the temperature rise of the partition member around the defective battery is transferred to the surrounding first partition member and second partition member, and the temperature rise can be suppressed. Further, by suppressing the temperature rise, it is possible to prevent the strength of the first partition member, the second partition member, and the like from decreasing, and to enhance the effect of maintaining the shape.

  The storage member, the first partition member, and the second partition member may be configured to cover a metal material such as copper (Cu), aluminum (Al), or iron (Fe) with the insulating resin. Thereby, mechanical strength can be improved with high heat conductivity. In the case where a short circuit does not occur in contact with the battery, it may be formed of only a metal material. Further, the metal material may have a mesh shape or a structure having a plurality of through holes. Thereby, weight reduction of a storage member, a 1st partition member, and a 2nd partition member is realizable, maintaining heat conductivity and mechanical strength.

  According to the present embodiment, the flame generated at the time of ignition or rupture of the gas ejected from the exhaust hole of the defective battery is dispersed in the space on the first partition member, so that the surrounding battery is not burned or abnormally overheated. Can be prevented. Moreover, by setting it as the 1st partition member of predetermined | prescribed height, the heating to the electrode group in the battery case of a battery can be suppressed significantly, and similar burning etc. can be prevented.

  In the above embodiment, the structure in which the storage member, the first partition member, and the second partition member are integrally formed has been described as an example, but the present invention is not limited to this. For example, FIG. 3A is a perspective view of another example of the battery storage tray according to Embodiment 1 of the present invention, and FIG. 3B is a cross-sectional view taken along line AA of FIG. The battery storage tray 150 may be configured such that the storage member 160 and at least the first partition member 170 and the second partition member 172 can be separated. Thereby, various batteries can be accommodated in the same accommodation member only by preparing the 1st partition member and the 2nd partition member according to the shape of a battery. As a result, a highly versatile battery storage tray capable of stacking batteries having different shapes in multiple stages can be realized.

(Embodiment 2)
FIG. 4A is a perspective view of a battery storage tray according to Embodiment 2 of the present invention, and FIG. 4B is a cross-sectional view taken along line AA of FIG. In this embodiment, an example in which a cylindrical battery similar to that shown in FIG. 1 is accommodated will be described.

  The present embodiment is different from the first embodiment in that a through-hole penetrating from one surface of the storage member to the other surface is provided. Other configurations are the same as those in the first embodiment.

  That is, as in the first embodiment, as shown in FIG. 4A, the battery storage tray 200 is provided on the first surface 214 of the storage member 210 made of an insulating resin material such as polyprolene resin. The first partition member 220 and the second partition member 222 made of an insulating resin material such as polyprolene resin provided on the other surface 216 of the storage member 210 are integrally formed with the storage member 210. .

  Further, as shown in FIG. 4B, the second partition member 222 is provided with a vent hole 225 in a direction along the surface of the other surface 216 of the storage member 210. And the 1st partition member 220 and the 2nd partition member 222 are provided facing the same position on both sides of the storage member 210. Further, the sum of the height K1 of the first partition member 220 and the height K2 of the second partition member 222 is set to be equal to or greater than the height D (distance between the positive electrode cap and the battery case bottom surface) of the battery 230 to be stored.

  Then, as shown in FIG. 4B, the storage member 210 has a storage area that is smaller than at least the outer diameter of the battery 230 in the battery storage area surrounded by the first partition wall member 220 and the second partition wall member 222. A through hole 215 that penetrates from one surface 214 of the member 210 to the other surface 216 is provided.

  According to the present embodiment, in a state where the battery 230 is stored in the battery storage tray 200, the battery case is disposed through the plus of the positive electrode cap of the battery and the through hole 215 of the storage member 210. The battery can be evaluated by connecting the minus of the bottom of the battery. In addition, even if the defective battery is ignited or ruptured during the charge / discharge test, and the rupture or ignited due to the abnormal voltage or abnormal current due to the malfunction occurs in the testing machine, the first partition member as in the first embodiment By using 220, it is possible to prevent influences such as burning on the surrounding batteries.

  At this time, the through hole 215 is more preferably smaller than the diameter of the uppermost portion of the positive electrode cap of the battery 230. This is caused by a flame that is ejected in an oblique direction from the exhaust hole provided on the side surface of the positive electrode cap of the battery, which is generated when the assembled battery storage tray structure in which the battery storage trays described in detail in the following embodiments are stacked. It is possible to prevent the battery from being directly burned.

(Embodiment 3)
FIG. 5A is a plan view seen from the top of the battery storage tray according to Embodiment 3 of the present invention, and FIG. 5B is a cross-sectional view taken along line AA in FIG. In this embodiment, an example in which a cylindrical battery similar to that shown in FIG. 1 is accommodated will be described.

  As shown in FIG. 5A, the battery storage tray 300 includes a first partition member 320 provided on one surface 314 of the storage member 310 made of an insulating resin material such as polyprolene resin, and the storage member 310. A second partition member 322 made of an insulating resin material such as polyprolene resin provided on the other surface 316 is integrally formed with the storage member 310. In addition, rib portions 311 are provided inside the storage member 310 and at least inside the first partition member 320. Further, the storage member 310 partially holds at least a through hole 340 smaller than the outer diameter of the battery 330 and a bottom portion of the battery 330 in a region surrounded by the first partition member 320 and the second partition member 322. A rib portion 350 is provided on one surface 314 of the storage member 310.

  As shown in FIG. 5B, the storage member 310 has an outer periphery with a height T that exceeds the height D of the battery (the distance between the positive electrode cap and the battery case bottom surface) when the predetermined battery 330 is stored. A frame 315 is included. In addition, the first partition member 320 separately stores a plurality of predetermined batteries 330, and at least from the contact surface of the battery 330 of the rib portion 350 of the one surface 314 of the storage member 310, at least the battery 330. It is formed at a height exceeding 50% of the height. For example, in the case of a battery having a rib portion height of 1 mm and a battery height of 65 mm, the height exceeds 33.5 mm.

  Here, the configuration and materials of the storage member, the first partition member, the second partition member, the rib portion, and the like are the same as those in the first embodiment, and a description thereof will be omitted.

  According to the present embodiment, as in the first embodiment, the flame generated at the time of ignition or rupture of the gas ejected from the exhaust hole of the defective battery is dispersed in the space on the first partition wall member, and is transferred to the surrounding batteries. It can prevent sizzling and abnormal overheating.

  Further, according to the present embodiment, the ribs provided on the storage member and the first partition wall member facilitate the positioning of the battery to be stored, and can keep the distance between adjacent batteries uniform. Thereby, since the influence of the heat generation and ignition of the defective battery can be made uniform with respect to the adjacent batteries, the influence of heat generation and the like can be further suppressed as compared with the case without the rib portion.

  Further, according to the embodiment of the present invention, a circulation channel such as air is formed by the rib portions provided in the storage member and the first partition member, and the ambient temperature of the battery can be made uniform in the aging process or the like.

  In the above embodiment, the example in which the through hole is provided in the storage member has been described. However, when the charge / discharge test or the like is not performed, it may be omitted. Moreover, although the example which provided the rib part in the one surface of the storage member demonstrated, when it aims only at the positioning of a battery, it is not necessary in particular.

(Embodiment 4)
FIG. 6 is a cross-sectional view for explaining an assembled battery storage tray according to Embodiment 4 of the present invention. FIG. 6A is a cross-sectional view showing a state before stacking the battery storage tray, and FIG. 6B is a cross-sectional view showing a state after stacking. In this embodiment, an example in which a cylindrical battery similar to that shown in FIG. 1 is accommodated will be described.

  As shown in FIG. 6, the assembled battery storage tray 400 according to the fourth embodiment of the present invention has a configuration in which the battery storage trays 100A and 100B described in the first embodiment are stacked in, for example, two stages. The configuration of the battery storage trays 100A and 100B is the same as that of the battery storage tray of the first embodiment, and a description thereof will be omitted.

  That is, as shown in FIG. 6B, the first partition member 120A of the battery storage tray 100A and the second partition member 122B of the battery storage tray 100B are abutted and stacked. At this time, for example, the space 402 is formed by contact between the first partition member 120A of the battery storage tray 100A and the second partition member 122B of the battery storage tray 100B, and the entire assembled battery storage tray is formed by the vent holes 125B of the second partition member 122B. Space 402 is shared. This is because the sum of the heights of the first partition member 120A and the second partition member 122B is higher than the height of the battery 130 to be accommodated.

  In FIG. 6 (b), the outer peripheral frame 115A of the battery storage tray 100A and the other surface 116B of the storage member 110B of the battery storage tray 100B are shown to be in contact in the same manner. It is not necessary to form a gap.

  As a result, the energy when a defective battery is ignited or ruptured is distributed in the space 402 shared via the vent hole 125B, thereby reducing abnormal overheating and concentration of flames on the surrounding batteries. Can be prevented. In addition, since the upper part of the battery 130 is opened, the battery storage tray 100A can further reduce the influence on the surrounding batteries.

  According to this embodiment, even if a plurality of battery storage trays are stacked, it is possible to realize a safe and highly reliable assembled battery storage tray that can prevent the influence of heat generation and ignition of defective batteries.

  In addition, although the example which laminated | stacked the battery storage tray of Embodiment 1 was demonstrated above, it is not restricted to this, You may laminate | stack the battery storage tray of Embodiment 2 or Embodiment 3, and the same effect Is obtained.

  Hereinafter, another example 1 of the assembled battery storage tray in Embodiment 4 of the present invention will be described with reference to FIG.

  FIG. 7 is a cross-sectional view illustrating another example 1 of the assembled battery storage tray according to Embodiment 4 of the present invention. FIG. 7A is a cross-sectional view showing a state before stacking the battery storage tray, and FIG. 7B is a cross-sectional view showing a state after stacking.

  That is, as shown in FIG. 7A, the battery storage tray 500 is provided with a first recess 517 on the end surface side of the outer peripheral frame 515 of the storage member 510 and a first surface on the outer surface of the other surface 516 of the storage member 510. The second protrusion 518 that fits into the recess 517 is provided. Then, for example, the first recess 517 of the lower battery storage tray 500 and the second protrusion 518 of the upper battery storage tray 500 are fitted together, and the lower first partition member 120 and the upper second partition member 122 are joined together. The assembled battery storage tray 600 is formed by contact.

  As a result, it is possible to realize an assembled battery storage tray that prevents positional deviation between stacked battery storage trays and has improved stability during stacking.

  In the above description, the first concave portion is provided on the outer peripheral frame of the storage member and the second convex portion is provided on the bottomed portion side, but the present invention is not limited thereto. For example, it is good also as a structure which provides a 1st convex part in the outer periphery frame of a storage member, and provides a 2nd recessed part in a bottomed part, and the same effect is acquired.

  Moreover, in the said embodiment, although demonstrated in the example which provided the 2nd convex part and the 2nd partition member in the battery storage tray of the lowest stage, as shown in another example 2 of the assembled battery storage tray of FIG. It is good also as a structure of the battery storage tray 625 which excluded them. Furthermore, although the above embodiment has been described with the upper portion of the uppermost battery storage tray being opened, the present invention is not limited to this. For example, as shown in FIG. 8, the outer peripheral frame of the storage member and the first partition member are eliminated, and a lid portion 650 having the storage member and the second partition member is formed, and a lid 650 is attached to the uppermost battery storage tray. It is good also as composition which carries out. Thereby, even if the defective battery in the uppermost battery storage tray is ignited or ruptured, it is possible to reliably prevent the lid portion 650 from scattering to the surroundings.

  Moreover, although the said embodiment demonstrated the example which provided the 1st recessed part of the outer periphery frame of a storage member, and provided the 2nd convex part in the other surface of the storage member, it is not restricted to this. For example, as shown in another example 1 of FIG. 9A, the first partition member 720 is provided with a first recess 721, the second partition member 722 is provided with a second projection 723, and these are fitted and laminated. May be. Further, as shown in another example 2 of FIG. 9B, for example, a conical or pyramidal first convex portion 724 is provided at the end of the first partition member 720, and the end of the second partition member 722 is provided. A conical or pyramidal second concave portion 725 that fits with the first convex portion 724 may be provided, and these may be fitted and laminated.

  By these, like the above, stacking of battery storage trays is facilitated, and lateral displacement and the like are reliably prevented. Further, the airtightness of the space formed by the first partition member and the second partition member can be improved, and the propagation of flame through the contact surfaces of the first partition member and the second partition member can be effectively prevented.

(Embodiment 5)
FIG. 10A is a perspective plan view seen from the top of the assembled battery storage tray according to Embodiment 5 of the present invention, and FIG. 10B is a cross-sectional view taken along the line AA of FIG. Note that, in FIG. 10B, in order to help understanding, a cylindrical battery shown in a perspective view is stored.

  In the present embodiment, as shown in FIG. 10B, the battery in the lower battery storage tray and the battery in the upper battery storage tray are arranged so as not to overlap in the stacking direction. Is different. In the following, an example in which battery storage trays are stacked in two stages will be described, but the present invention is not limited to this.

  That is, as shown in FIG. 10B, the second battery storage tray including the first partition member 920 and the second partition member 922 at least on the first battery storage tray 800 including the first partition member 820. The assembled battery storage tray 1000 is formed by laminating 900. At this time, as shown in FIG. 10 (a), the battery is enclosed by the first partition member 820 of the first battery storage tray 800 and the second partition member 922 (dotted line in the drawing) of the second battery storage tray 900. The region 1002 and the battery storage region 1004 surrounded by the first partition member 920 of the first battery storage tray 800 are arranged at different positions.

  According to the present embodiment, since the batteries between the stacks are not arranged immediately above when stacking, the distance between the stacked batteries is increased to further reduce the impact on the upper battery of the ignition or rupture caused by the defective battery. it can.

  In the present embodiment, the battery storage surrounded by the first partition member 920 of the second battery storage tray 900 so as to straddle the four battery storage regions 1002 of the first partition member 820 of the first battery storage tray 800. Although the example in which the region 1004 is arranged has been described, the present invention is not limited to this. For example, the battery storage area 1004 of the first partition member 920 of the second battery storage tray 900 may be disposed so as to straddle the two battery storage areas 1002 of the first partition member 820 of the first battery storage tray 800, Any arrangement is possible as long as the battery storage area 1002 of the first battery storage tray 800 and the battery storage area 1004 of the second battery storage tray 900 do not overlap.

  In addition, as the shape of the vent of the second partition member described in the assembled battery storage tray of the fourth embodiment or the fifth embodiment, as shown in FIGS. 11A and 11B, for example, Any shape such as a circular vent 1010 or a square vent 1020 can be used. At this time, it is preferable to provide the vents so that they are located in the vicinity of the exhaust holes of the accommodated battery.

  If the height of the first partition member 1120 of the lower battery storage tray 1100 of the assembled battery storage tray is 80% or more of the battery height, as shown in FIG. For example, a semicircular vent hole may be formed at the end of the contact surface 1250 side between the first partition member 1120 and the second partition member 1222 of the battery storage tray 1200.

  Hereinafter, the present invention will be described more specifically with reference to examples. In addition, this invention is not limited to a following example, Unless it changes the summary of this invention, it can change and use the material etc. to be used.

(Example 1)
First, using a cylindrical battery having a height of 65 mm, an outer diameter of 18 mm and a battery capacity of 2600 mAh, the first partition member has a height of 32.6 mm (a height exceeding 50% of the height of the battery), and a vent hole. An assembly battery storage tray is configured by stacking 3 rows and 3 columns of battery storage trays having a height of 34.4 mm of the second partition wall member formed with the above-described battery, and at least the lower row of 3 rows and 3 columns of battery storage trays includes the above battery. Nine were stored. This was designated as Sample 1.

(Example 2)
Example 1 was performed except that the height of the first partition member was 39 mm (60% of the height of the battery) and the height of the second partition member was 28 mm. This was designated as sample 2.

(Example 3)
Example 1 was performed except that the height of the first partition member was 52 mm (80% of the height of the battery) and the height of the second partition member was 15 mm. This was designated as sample 3.

Example 4
The height of the first partition member is 65 mm (100% of the height of the battery), the height of the second partition member is 2 mm, and vent holes are provided near the short portion (height 55 mm) of the first partition member. The procedure was the same as in Example 1 except that it was provided. This was designated as sample 4.

(Example 5)
The height of the first partition member is 26 mm (40% of the height of the battery), the height of the second partition member is 36 mm, and they are stacked via an outer peripheral frame having a height of 67 mm. Example 1 was performed except that a gap (5 mm) was provided between the first partition member and the second partition member. This was designated as Sample 5.

(Example 6)
Example 1 was the same as Example 1 except that the height of the first partition member was 32.6 mm (a height exceeding 50% of the height of the battery) and the height of the second partition member was 0 mm. This was designated as sample 6.

(Example 7)
Example 1 was performed except that the height of the first partition member was 52 mm (80% of the height of the battery) and the height of the second partition member was 0 mm. This was designated as Sample 7.

(Comparative Example 1)
The height of the first partition member is 26 mm (40% of the height of the battery), the height of the second partition member is 0 mm, and the stack is stacked through an outer peripheral frame having a height of 67 mm. Example 1 was performed except that a gap (45 mm) was provided between the first partition member and the second partition member. This was designated as Sample C1.

  The evaluation shown below was performed on the battery storage tray storing the plurality of batteries manufactured as described above.

  First, a battery from which a safety mechanism other than the battery vent mechanism was removed was prepared, and nine batteries were stored and arranged in each battery storage tray having 3 rows and 3 columns. Next, only the battery in the center was charged until the battery voltage became 5 V assuming a problem with the charging facility, gas was blown out, and a flame was generated by ignition.

  At this time, a thermocouple was attached to each of the surrounding batteries on the opposite side of the surface facing the central battery, and the temperature rise was measured. Moreover, after completion | finish of a test, each battery was decomposed | disassembled and the short circuit state of the electrode group was observed. Furthermore, the open state of the vent mechanism provided in each battery was observed.

  And the influence on the surrounding battery by the ignition of the battery of the center part was evaluated by the maximum rising temperature, the number of short-circuit batteries, the number of open batteries of the vent mechanism, and the presence or absence of ignition or rupture.

  The specifications and evaluation results of Samples 1 to 7 and Sample C1 are shown below (Table 1).

  As shown in (Table 1), in samples 1 to 5, no temperature increase, short circuit of the electrode group, or opening of the vent mechanism occurred in the surrounding batteries. This is because the battery is stored in the space surrounded by the first partition member and the second partition member by stacking the battery storage trays, so that even if a problem occurs in some batteries, the effect of each partition member is greatly affected. It is thought that it can be suppressed.

  In addition, as shown in Table 1, when Sample 6, Sample 7 and Sample C1 are compared, in the battery storage tray separated by the first partition member having a height exceeding 50% of the height of the battery, Even when the storage tray is used alone or in the uppermost stage, there has been no opening of the vent mechanism that causes the surrounding battery to ignite or rupture. In particular, as in Sample 7, it was found that by setting the height of the first partition member to 80% or more of the height of the battery, short-circuiting of the electrode group of the surrounding battery can be sufficiently suppressed.

  However, in the battery storage tray having the first partition member having a height of about 40% of the battery height as in the sample C1, the vent that causes the surrounding battery to explode or ignite due to the ignition or rupture of the battery in the center. In some batteries, the mechanism was opened in 5 out of 8 batteries and ignited or ruptured. This is because the first partition member having a predetermined height does not open the vent mechanism that causes the explosion or ignition of the surrounding battery, and thus the discharge of the electrolyte or the like is effectively prevented. thinking.

  From the above, when storing batteries by stacking battery storage trays, it is sufficient if at least the height of the first partition member of the uppermost battery storage tray to be stacked exceeds 50% of the battery height. It was found that an assembled battery storage tray capable of ensuring a high level of safety can be obtained. In the battery storage tray other than the uppermost stage, the first partition wall member and the second partition wall member can store the battery therein, so that the height of each partition member has a vent hole or is formed. In particular, it has been found that it is not necessary to pay attention to the ratio with the height of the battery.

  Further, as shown in Table 1, when Samples 1 to 4 and Sample 5 were compared, in Sample 5, the temperature increase of the surrounding batteries was slightly large. This is because the gap formed between the first partition member and the second partition member is about 40% of the height of the battery compared to the battery storage tray provided with a vent in the vicinity of the exhaust valve of the battery. Since it is used as a ventilation hole, it is considered that heat is applied in the vicinity of the electrode group of the battery. However, if the gap is about 5 mm, it is considered that there is no problem with respect to safety.

  INDUSTRIAL APPLICABILITY The present invention is useful for battery storage trays that store batteries and the like, particularly when stacked and used as an assembly battery storage tray that requires high reliability and safety.

1 is a cross-sectional view of a battery stored in a battery storage tray in Embodiment 1 of the present invention. (A) Perspective view of battery storage tray in Embodiment 1 of the present invention (b) AA line cross-sectional view of FIG. (A) Perspective view of another example of battery storage tray in Embodiment 1 of the present invention (b) AA line sectional view of FIG. 3 (a) (A) Perspective view of battery storage tray in embodiment 2 of the present invention (b) AA line sectional view of FIG. 4 (a) (A) Plan view seen from the top of the battery storage tray in Embodiment 3 of the present invention (b) AA line sectional view of FIG. 5 (a) (A) Sectional view showing a state before stacking of the battery storage tray of the battery pack tray in Embodiment 4 of the present invention (b) After stacking of the battery storage tray of the battery pack tray in Embodiment 4 of the present invention Sectional view showing the state of (A) Cross-sectional view showing a state before stacking of battery storage trays in another example 1 of the assembled battery storage tray in Embodiment 4 of the present invention (b) Separation of the assembled battery storage tray in Embodiment 4 of the present invention Sectional drawing which shows the state after lamination | stacking of the battery storage tray of Example 1 of Sectional drawing which shows another example 2 of the assembled battery storage tray in Embodiment 4 of this invention (A) Sectional drawing which shows another example 1 of the 1st partition member and 2nd partition member of the battery storage tray in Embodiment 4 of this invention (b) 1st of the battery storage tray in Embodiment 4 of this invention Sectional drawing which shows another example 2 of a partition member and a 2nd partition member (A) Perspective plan view as seen from the top of the assembled battery storage tray in Embodiment 5 of the invention (b) AA line sectional view of FIG. 10 (a) Sectional drawing explaining the form of the various ventilation holes applied to each embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Positive electrode 1a Positive electrode collector 1b Positive electrode layer 2 Negative electrode 3 Separator 4 Electrode group 5 Battery case 6 Sealing plate 7 Gasket 8 Positive electrode lead 9 Negative electrode lead 10a, 10b Insulating plate 11 Negative electrode collector 15 Negative electrode layer 16 Positive electrode cap 17 Exhaust hole 18 Current interruption member 19 Vent mechanism 100, 100A, 100B, 150, 200, 300, 500, 625, 1100, 1200 Battery storage tray 110, 110B, 160, 210, 310, 510 Storage member 114, 214, 314 One surface 115, 115A, 315, 515 Peripheral frame 116, 116B, 216, 316, 516 The other surface 120, 120A, 170, 220, 320, 720, 820, 920, 1120 First partition members 122, 122B, 172, 222, 322, 722, 922, 122 Second partition member 125, 125 B, 225, 1010, 1020 Vent hole 130, 230, 330 Battery 215, 340 Through hole 311, 350 Rib part 400, 600, 1000 Assembly battery storage tray 402 Space 517, 721 First recess 518, 723 2nd convex part 650 Lid part 724 1st convex part 725 2nd recessed part 800 1st battery storage tray 900 2nd battery storage tray 1002, 1004 Battery storage area 1250 Contact surface

Claims (12)

A first partition member for individually separating the batteries is provided on one surface of the storage member, and a second partition member provided at a position corresponding to the first partition member on the other surface of the storage member,
The second partition member has a vent in a direction along the surface of the other surface of the storage member, and the sum of the height of the first partition member and the height of the second partition member is A battery storage tray having a height higher than that. The battery storage tray according to claim 1, wherein the height of the first partition member exceeds 50% of the height of the battery. 3. The battery storage tray according to claim 1, wherein a through hole smaller than the shape of the battery is provided at a position where the battery is stored between the first partition members of the storage member. The battery storage tray according to any one of claims 1 to 3, wherein the first partition member and the second partition member are provided so as to be separable from the storage member. 5. The battery according to claim 1, wherein the housing member, the first partition member, and the second partition member have a structure in which a metal material is covered with an insulating resin. Storage tray. The battery storage tray according to any one of claims 1 to 5, wherein a rib portion is provided at least on an inner surface side of the storage member and the first partition wall member. The battery storage tray according to claim 1, wherein a rib portion is provided on one surface of the storage member that stores the battery between the first partition members. The first partition member is provided with a first recess or a first protrusion, and the second partition member at a position corresponding to the first recess or the first protrusion is provided with a second protrusion or a second recess. The battery storage tray according to any one of claims 1 to 7, wherein: An assembled battery storage tray in which the battery storage trays according to any one of claims 1 to 8 are stacked to store the batteries. A first battery storage tray having a first partition member and a second partition member; and a second battery storage tray having a first partition member and a second partition member;
The position of the first partition member and the second partition member of the first battery storage tray and the position of the first partition member and the second partition member of the second battery storage tray are provided at different positions. The assembled battery storage tray according to claim 9. The assembled battery storage tray according to claim 10, wherein the second battery storage tray includes only the first partition member. 12. The lid member according to claim 9, further comprising a lid member having a second partition member at a position corresponding to the first partition member of the first battery storage tray. Collective battery storage tray.

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