WO2019065110A1 - Power supply device - Google Patents

Power supply device Download PDF

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Publication number
WO2019065110A1
WO2019065110A1 PCT/JP2018/032648 JP2018032648W WO2019065110A1 WO 2019065110 A1 WO2019065110 A1 WO 2019065110A1 JP 2018032648 W JP2018032648 W JP 2018032648W WO 2019065110 A1 WO2019065110 A1 WO 2019065110A1
Authority
WO
WIPO (PCT)
Prior art keywords
power supply
battery
potting resin
discharge valve
closing cover
Prior art date
Application number
PCT/JP2018/032648
Other languages
French (fr)
Japanese (ja)
Inventor
米田　晴彦
真己 拝野
岸田　裕司
Original Assignee
三洋電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三洋電機株式会社 filed Critical 三洋電機株式会社
Priority to JP2019544481A priority Critical patent/JP7174707B2/en
Priority to CN201880062897.7A priority patent/CN111164786B/en
Publication of WO2019065110A1 publication Critical patent/WO2019065110A1/en
Priority to PH12020550163A priority patent/PH12020550163A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271—Lids or covers for the racks or secondary casings
    • H01M50/273—Lids or covers for the racks or secondary casings characterised by the material
    • H01M50/278—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a power supply device that radiates heat of a battery by potting resin.
  • the power supply device needs to dissipate heat energy of the built-in battery to the outside. It is because the temperature rise of the battery causes the safety to be lowered, and further causes the battery to be adversely affected and deteriorated.
  • a power supply device has been developed which brings potting resin into close contact with the surface of a battery and dissipates heat energy through the potting resin. (See Patent Document 1)
  • the end face of the battery is embedded in the potting resin, and the heat energy of the battery is conducted to the potting resin and dissipated. Since the power supply device of this structure embeds the end face of the battery in the potting resin, the potting resin obstructs the discharge port of the discharge valve and has an adverse effect of preventing the quick discharge.
  • the battery opens the discharge valve when the internal pressure of the outer can becomes higher than the set pressure, thereby preventing the outer can from being destroyed.
  • the opening discharge valve smoothly discharges the jetted gas from the discharge port to the outside to prevent the rise in internal pressure. Therefore, the structure in which the jetted gas can not be smoothly discharged can not realize a rapid decrease in the rise in internal pressure.
  • the present invention has been developed for the purpose of preventing the above-mentioned adverse effects.
  • One of the objects of the present invention is to provide a structure in which a potting resin is brought into close contact with a battery to efficiently dissipate heat energy. It is an object of the present invention to provide a power supply device capable of achieving high safety by discharging gas smoothly. In addition, another object of the present invention is to provide a power supply device capable of ensuring heat radiation characteristics and safety by filling potting resin easily and efficiently while filling potting resin at a position ideal for heat radiation of a battery. It is to do.
  • a plurality of battery cells formed by arranging the opening of the discharge valve which opens at the set pressure on the end face are in parallel posture and both ends are arranged in the same plane
  • a battery unit is disposed so as to face the end face of the battery cell via an insulating space, and is disposed in close contact with the battery assembly and a battery assembly in which a discharge port of a discharge valve is disposed in the insulating space.
  • a potting resin and a blocking cover disposed in the insulating space and covering the opening of the discharge valve.
  • the closing cover is a foam of an insulating material having an independent bubble which is melted by the gas discharged from the discharge valve of the battery cell, and the closing cover flows the potting resin into the opening of the discharge valve. It blocks, and it is made to be able to be melted by the gas jetted from the discharge valve, and let the gas jet out.
  • the above power supply device is characterized in that the battery cell and the potting resin are in close contact with each other, the thermal energy of the battery cell can be dissipated efficiently, and the jetted gas of the discharge valve can be smoothly discharged to realize high safety.
  • the power supply device described above can efficiently dissipate the heat of the battery cells because the potting resin is in close contact with the battery assembly, and the potting resin dissipates the heat energy of the battery cells to the outside.
  • the closed cover is a foam of closed cells which is melted by the blow gas.
  • the closed cover made of closed-cell foam that is melted by the blow gas substantially reduces the mass to be melted substantially because the porosity can be significantly increased by the innumerable bubbles while reliably preventing the inflow of potting resin. It is characterized in that it can be rapidly melted by the high temperature and high pressure jetted gas injected from the discharge port, and the jetted gas can be discharged quickly.
  • the above power supply device can be filled with the potting resin in a state where the discharge cover of the discharge valve is closed by the closing cover, the potting resin is reliably prevented from closing the discharge port of the discharge valve. It is characterized in that the potting resin can be easily, easily and efficiently filled and efficiently mass-produced while filling at a position preferable for heat dissipation. Therefore, the above power supply device realizes excellent heat radiation characteristics with potting resin, and further prevents the exhaust valve from being blocked by the potting resin, and smoothly discharges the jetted gas, thereby providing high safety. It also realizes the feature to realize the nature.
  • the melting temperature of the said closure cover can be 100 degreeC or more and 500 degrees C or less.
  • the closing cover can be used as the insulating material of a rubbery elastic body.
  • the closing cover can be made of a foam made of either synthetic rubber or soft plastic.
  • the closing cover has an outer peripheral frame that closes the outer peripheral part of the insulating space, and the potting resin
  • the exhaust chamber can be provided inside the outer peripheral frame while filling the outer side of the frame, and the exhaust port of the exhaust valve can be opened in the exhaust chamber.
  • FIG. 1 It is a vertical sectional view showing a power supply device concerning one embodiment of the present invention. It is a principal part expanded sectional view of the power supply device of FIG. It is the III-III sectional view taken on the line of the power supply device of FIG. It is a disassembled perspective view of the battery assembly of the power supply device of FIG. It is a disassembled perspective view of the closure cover shown in FIG.
  • each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and one member is used in common as a plurality of elements, or conversely the function of one member is realized by a plurality of members It can be shared and realized.
  • the contents described in some examples and embodiments may be applicable to other examples and embodiments.
  • the power supply device shown below mainly demonstrates the example applied to the drive power supply of electric vehicles, such as an electric vehicle and an electric cart which drive
  • the power supply device 100 shown in FIGS. 1 to 3 has a battery assembly 40 built in an exterior case 9.
  • the battery assembly 40 includes a pair of battery units 40A, and arranges and connects the pair of battery units 40A at opposing positions (left and right in FIG. 1). (Battery unit 40A)
  • battery unit 40A arranges a plurality of secondary battery cells 1 in a parallel posture, arranges both ends in the same plane, and connects lead plate 45 to end electrodes 13 at both ends. ing.
  • the battery assembly 40 arranges a pair of battery units 40A arranged at opposing positions in the axial direction of the secondary battery cell 1, and also provides an insulating space 6 between the pair of battery units 40A.
  • Each battery unit 40A arrange
  • the secondary battery cell 1 is provided at its end face with a discharge port (not shown) of a discharge valve that opens at a set pressure.
  • the secondary battery cell 1 is provided with end electrodes 13 at both ends.
  • the opening of a metal outer can such as aluminum is hermetically sealed with a sealing plate, and a convex electrode is provided on the sealing plate to form a first end electrode 13A, and the bottom of the outer can As a second end electrode 13B.
  • the discharge port of the discharge valve is provided on the convex electrode side or on the bottom surface of the outer can.
  • the secondary battery cell 1 is a cylindrical lithium ion battery.
  • the lithium ion battery has a large capacity with respect to size and weight, and can increase the total capacity of the power supply device 100.
  • the power supply device of the present invention does not specify the secondary battery cell as a lithium ion battery.
  • Other secondary batteries that can be charged can be used for the secondary battery cell.
  • the power supply apparatus 100 of FIG. 1 makes the secondary battery cell 1 a cylindrical battery, a square battery can also be used for a secondary battery cell.
  • a lead plate 45 is welded to the end electrodes 13 at both ends thereof, and the adjacent secondary battery cells 1 are connected in series or in parallel. (Battery holder 44)
  • the secondary battery cell 1 is disposed at a fixed position by the battery holder 44 as shown in FIG.
  • the battery holder 44 is manufactured by molding an insulating material such as plastic.
  • the illustrated battery holder 44 arranges all the secondary battery cells 1 at a fixed position in a parallel posture. Since the secondary battery cells 1 arranged at a fixed position by the battery holder 44 have the lead plates 45 welded to both ends, each lead plate 45 to be welded to each end is positioned in the same plane.
  • the secondary battery cell 1 is disposed in the battery holder 44 so that both ends thereof are positioned substantially in the same plane.
  • the battery holder 44 is provided with the insertion part 44A which inserts the secondary battery cell 1 and arrange
  • the insertion portion 44A has a cylindrical shape.
  • the battery holder 44 has a cylindrical plastic shape and is provided with the insertion portion 44A inside.
  • the insertion portion 44A is provided at both ends with openings 44B for exposing the battery end.
  • the opening 44B exposes the end of the secondary battery cell 1 inserted into the insertion portion 44A to the outside from the insertion portion 44A.
  • the battery assembly 40 is in close contact with the potting resin 7 and conducts heat energy of the secondary battery cell 1 to the potting resin 7 to dissipate heat.
  • the potting resin 7 is in close contact with the battery surface directly or in close contact with the secondary battery cell 1 via the battery holder 44 and the lead plate 45 to dissipate the heat of the secondary battery cell 1.
  • the potting resin 7 puts the battery assembly 40 in the waterproof bag 75, fills the waterproof bag 75 with the uncured liquid potting resin 7, cures the potting resin 7, and adheres to the battery assembly 40. .
  • the battery assembly is put in the outer case and the potting resin is
  • the battery case can be filled and closely attached, and a space for filling the potting resin can be provided in the battery holder, or alternatively, the battery assembly can be placed and filled in a case for filling the potting resin.
  • the potting resin 7 can widen the heat conduction area in close contact with the battery surface of the battery assembly 40 and the like, and can effectively dissipate the heat of the secondary battery cell 1.
  • the uncured potting resin 7 is in a liquid state, and is filled and infiltrates into a narrow gap. Therefore, it penetrates from the opening of the lead plate 45 welded to the end face of the secondary battery cell 1 and the gap with the secondary battery cell 1 Then, it is in close contact with the surface of the secondary battery cell 1.
  • the battery assembly 40 in which the insulating space 6 is provided between the pair of battery units 40A and the end faces of the secondary battery cells 1 are disposed on both sides of the insulating space 6 has a discharge port of the discharge valve. Exposed to the insulating space 6.
  • the discharge valve is opened, high temperature jetted gas is injected from the discharge port.
  • the potting resin 7 blocks the discharge port of the discharge valve to inhibit the discharge of the jetted gas.
  • the potting resin 7 which intrudes into the interior from the discharge port inhibits the normal operation of the discharge valve.
  • the power supply device opens the discharge valve to prevent the rupture of the secondary battery cell 1 when the internal pressure of the secondary battery cell 1 becomes abnormally high, so that the structure in which the jetted gas can not be discharged smoothly is similar to that of the secondary battery cell 1 Even if heat can be dissipated efficiently, high safety can not be ensured. (Occlusion cover 61)
  • the closing cover 61 is disposed in the insulating space 6 so that the potting resin 7 does not close the discharge port of the discharge valve.
  • the closing cover 61 of the power supply apparatus 100 has an outer peripheral frame 62 closing the outer peripheral part of the insulating space 6, and the outer peripheral frame 62 moves to the insulating space 6 of the potting resin 7.
  • the potting resin 7 is filled on the outer side of the outer peripheral frame 62, and the exhaust chamber 63 is provided inside the outer peripheral frame 62 to expose the exhaust port of the exhaust valve to the exhaust chamber 63. .
  • the outer peripheral frame portion 62 has a shape extending along the outer peripheral edge portion of the insulating space 6, closely in contact with the end face of the battery unit 40A without a gap, and prevents the potting resin 7 from flowing into the insulating space 6.
  • the closed cover 61 having this structure is characterized in that a large volume exhaust chamber 63 is provided inside the outer peripheral frame 62 and the jetted gas can be jetted here, so that the jetted gas can be smoothly discharged. The reason is that the large-volume exhaust chamber 63 has a slow rise in internal pressure due to the gas jetted from the discharge port of the discharge valve, and can make the rise gradient of the exhaust resistance gentle.
  • the closing cover 61 is formed of a foam of an insulating material having closed cells which are melted by the gas discharged from the discharge valve.
  • the melting temperature of the blocking cover 61 melted by the jet gas is, for example, 100 ° C. or more and 500 ° C. or less, preferably 200 ° C. or more and 400 ° C. or less.
  • the closing cover 61 having a low melting temperature can be quickly melted by the jetted gas to discharge the jetted gas to the outside of the insulating space 6, and the closing cover 61 having a high melting temperature can block the insulating space 6 reliably in use.
  • the melting temperature of the blocking cover 61 is set in the above-mentioned range in consideration of the temperature characteristic which is promptly melted in the jetted gas and does not deform or melt in the state where the jetted gas is not jetted.
  • the closed cover 61 melted by the jetted gas prevents the flow of the potting resin 7 into the insulating space 6 without being melted in the step of filling the liquid potting resin 7 and jets high temperature jetted from the opened discharge valve. It is melted by gas.
  • the melted closing cover 61 opens the insulating space 6 to the outside, and the jetted gas to be injected is discharged from the insulating space 6 as shown by the arrows in FIGS. 2 and 3.
  • the closing cover 61 made of an insulating material is in close contact with the end portion electrode 13 side of the battery unit 40A, so that the insulating space 6 can be closed.
  • the closing cover 61 of the insulating material is in close contact with the lead plate 45, and the insulating space 6 is closed without shorting the lead plate 45. it can. Furthermore, since the closed cover 61 of the foam having closed cells has a small weight per unit volume and can reduce the density, it is rapidly melted by the high-temperature jetted gas, and the jetted gas is rapidly discharged to the outside from the insulating space 6 There is a feature that can be done. Furthermore, since the closed cover 61 of the foam can be made to have a lower specific gravity by controlling the foaming ratio at the time of molding, the melting time by the jet gas can be extremely shortened.
  • the closing cover 61 is formed of a rubber-like elastic foam.
  • the rubber-like elastic closure cover 61 is formed of, for example, a synthetic rubber foam or a soft plastic foam. Propylene rubber can be used as the synthetic rubber foam. For example, a soft urethane foam can be used for the soft plastic foam.
  • the closing cover 61 made of a rubber-like elastic body is disposed between the pair of battery units 40A, pressed by the battery units 40A on both sides, and elastically deformed in a compressed state to be in close contact with the opposing surface 40a of the battery unit 40A. Do.
  • the closing cover 61 in close contact with the facing surface 40 a of the battery unit 40 A is characterized in that the liquid potting resin 7 injected into the insulating space 6 can be reliably prevented from entering the insulating space 6.
  • the lead plate 45 forms asperities and gaps on the facing surface 40a. It is characterized in that the unevenness can be absorbed and the gap can be closed to surely prevent the potting resin 7 from invading the insulating space 6.
  • the closed cover 61 of the rubber-like elastic body made of the foam having the closed cells has a greater degree of freedom to be softened and deformed by the innumerable air bubbles, and there is no gap on the facing surface 40a of the battery unit 40A having unevenness. It is characterized in that it adheres tightly and closes the gap to prevent the potting resin 7 from flowing into the insulating space 6 more reliably.
  • the closing cover 61 made of a rubber elastic body can be elastically deformed to be in close contact with the facing surface 40a of the battery unit 40A, thereby reducing the pressing force of the facing surface 40a of the battery unit 40A. Therefore, there is a feature that the insulating space 6 can be reliably closed without causing an excessive stress on the battery unit 40A while in close contact with the facing surface 40a of the battery unit 40A.
  • the closing cover 61 does not necessarily have to be formed of a rubber-like elastic body.
  • a packing that elastically deforms is disposed between the closing cover 61 and the facing surface 40a of the battery unit 40A, or a sealing material is applied to closely attach the closing cover 61 to the facing surface 40a of the battery unit 40A. It is because
  • the present invention identifies the closing cover 61 in this shape. It is not something to do.
  • the closing cover is formed into a plate-like foam in which a recess is provided on the surface facing the discharge port of the discharge valve of the secondary battery cell, or it is disposed without gaps in the insulating space, It is also possible to form a plate without the exhaust chamber to close the outlet of the outlet valve.
  • the expansion ratio of the foam is increased to increase the porosity inside the closure cover, and the melting temperature is lowered to shorten the melting time by the high-temperature jetted gas, thereby providing an insulating space. Immediately discharge the jetted gas to the outside.
  • the power supply apparatus 100 of FIG. 1 and FIG. 2 arranges the heat resistant sheet 64 in the middle of the insulating space 6, arranges the closing cover 61 on both sides of the heat resistant sheet 64, and forms the closing cover 61 with the heat resistant sheet 64 and the battery unit 40A.
  • the heat-resistant sheet 64 is a sheet having a heat-resistant property in which the jetted gas is not melted, and protects the opposing secondary battery cell 1 from the jetted gas injected into the insulating space 6 to prevent thermal runaway of the secondary battery cell 1.
  • the heat-resistant sheet 64 is an insulating sheet, and prevents short circuiting of the lead plates 45 of the battery unit 40A disposed on the opposite surface 40a of the both surfaces, ie, the insulating space 6.
  • the heat-resistant sheet 64 it is possible to use flame-retardant treated insulating paper or paper or non-woven fabric in which insulating heat-resistant fibers are collected. Since these heat-resistant sheets 64 can be made thin, the heat-resistant sheets 64 can widen the insulating space 6 without reducing the substantial volume of the insulating space 6 and can discharge the jetted gas smoothly.
  • the power supply device 100 of FIGS. 1 and 3 has the insulating sheet 65 laminated on the surface of the outer peripheral frame 62 of the closing cover 61 and the surface of the heat resistant sheet 64.
  • the insulating sheet 65 is made of plastic, and the closing covers 61 are disposed on both sides of the heat resistant sheet 64, and the heat resistant sheet 64 and the closing covers 61 on both sides are integrally connected to each other.
  • the insulating spacer 60 is disposed in a state of being sandwiched between the pair of battery units 40A, and arranges the closing cover 61 and the heat-resistant sheet 64 at a predetermined position of the insulating space 6. Therefore, this structure is characterized in that the assembly process is simplified and mass production is efficiently performed, and the heat-resistant sheet 64 and the closing cover 61 can be disposed at the correct positions.
  • the power supply device of the present invention is conveniently used for applications requiring high safety while efficiently radiating a large number of built-in secondary battery cells.

Abstract

The purpose of the present invention is to dissipate heat efficiently using a potting resin, achieve high safety by smoothly discharging ejected gas from a discharge valve, fill a potting resin simply and efficiently, and ensure heat-dissipation characteristics and safety of a battery. This power supply device is provided with a battery assembly (40) in which a pair of battery units (40A) are arranged in positions opposing an insulating space (6), with discharge openings of discharge valves included in battery cells (1) in the battery units (40A) arranged in the insulating space (6). The battery assembly (40) is in close contact with a potting resin (7). A closing cover (61) made of a foam of an insulating material having closed pores that can be melted by ejected gas from the battery cells (1) is arranged in the insulating space (6). The closing cover (61) blocks flow of the potting resin (7) into discharge valve opening portions.

Description

電源装置Power supply
　本発明は、電池の熱をポッティング樹脂で放熱する電源装置に関する。 The present invention relates to a power supply device that radiates heat of a battery by potting resin.
　電源装置は、内蔵電池の熱エネルギーを外部に放熱する必要がある。電池の温度上昇が安全性を低下させる原因となり、さらに電池に悪影響を与えて劣化させる原因となるからである。電池の表面にポッティング樹脂を密着させ、熱エネルギーをポッティング樹脂を介して放熱する電源装置は開発されている。（特許文献１参照） The power supply device needs to dissipate heat energy of the built-in battery to the outside. It is because the temperature rise of the battery causes the safety to be lowered, and further causes the battery to be adversely affected and deteriorated. A power supply device has been developed which brings potting resin into close contact with the surface of a battery and dissipates heat energy through the potting resin. (See Patent Document 1)
特開２００８－２５１４７１号公報JP, 2008-251471, A
　特許文献１の電源装置は、電池の端面をポッティング樹脂に埋設し、電池の熱エネルギーをポッティング樹脂に伝導して放熱している。この構造の電源装置は、電池の端面をポッティング樹脂に埋設するので、ポッティング樹脂が排出弁の排出口を閉塞して、速やかに排出させるのを阻害する弊害がある。電池は、外装缶の内圧が設定圧力よりも高くなると排出弁を開いて外装缶が破壊されるのを防止している。開弁する排出弁は、排出口からスムーズに噴出ガスを外部に排出して内圧上昇を阻止するので、噴出ガスがスムーズに排出できない構造は、内圧上昇の速やかな低下を実現できないからである。 In the power supply device of Patent Document 1, the end face of the battery is embedded in the potting resin, and the heat energy of the battery is conducted to the potting resin and dissipated. Since the power supply device of this structure embeds the end face of the battery in the potting resin, the potting resin obstructs the discharge port of the discharge valve and has an adverse effect of preventing the quick discharge. The battery opens the discharge valve when the internal pressure of the outer can becomes higher than the set pressure, thereby preventing the outer can from being destroyed. The opening discharge valve smoothly discharges the jetted gas from the discharge port to the outside to prevent the rise in internal pressure. Therefore, the structure in which the jetted gas can not be smoothly discharged can not realize a rapid decrease in the rise in internal pressure.
　本発明は、以上の弊害を防止することを目的に開発されたもので、本発明の目的の一は、電池にポッティング樹脂を密着させ熱エネルギーを効率よく放熱できる構造としながら、排出弁の噴出ガスをスムーズに排出して高い安全性を実現できる電源装置を提供することにある。
　また、本発明の他の目的は、ポッティング樹脂を電池の放熱に理想的な位置に充填しながら、ポッティング樹脂の充填を簡単かつ能率よくして、放熱特性と安全性を確保できる電源装置を提供することにある。 The present invention has been developed for the purpose of preventing the above-mentioned adverse effects. One of the objects of the present invention is to provide a structure in which a potting resin is brought into close contact with a battery to efficiently dissipate heat energy. It is an object of the present invention to provide a power supply device capable of achieving high safety by discharging gas smoothly.
In addition, another object of the present invention is to provide a power supply device capable of ensuring heat radiation characteristics and safety by filling potting resin easily and efficiently while filling potting resin at a position ideal for heat radiation of a battery. It is to do.
課題を解決するための手段及び発明の効果Means for Solving the Problems and Effects of the Invention
　本発明の第１の側面に係る電源装置は、設定圧力で開弁する排出弁の開口部を端面に配置してなる複数の電池セルが平行姿勢であって両端を同一平面に配置してなる電池ユニットが、絶縁スペースを介して前記電池セルの端面を対向して配置して、前記絶縁スペースに排出弁の排出口を配置してなる電池集合体と、前記電池集合体に密着してなるポッティング樹脂と、前記絶縁スペース内に配置されて、前記排出弁の開口部を覆う閉塞カバーとを備えている。前記閉塞カバーは、前記電池セルの排出弁から排出される噴出ガスで溶融する独立気泡を有する絶縁材の発泡体で、前記閉塞カバーが、前記ポッティング樹脂の前記排出弁の開口部への流入を阻止し、かつ前記排出弁からの噴出ガスで溶融して噴出ガスを通過させるようにしている。 In the power supply device according to the first aspect of the present invention, a plurality of battery cells formed by arranging the opening of the discharge valve which opens at the set pressure on the end face are in parallel posture and both ends are arranged in the same plane A battery unit is disposed so as to face the end face of the battery cell via an insulating space, and is disposed in close contact with the battery assembly and a battery assembly in which a discharge port of a discharge valve is disposed in the insulating space. A potting resin and a blocking cover disposed in the insulating space and covering the opening of the discharge valve. The closing cover is a foam of an insulating material having an independent bubble which is melted by the gas discharged from the discharge valve of the battery cell, and the closing cover flows the potting resin into the opening of the discharge valve. It blocks, and it is made to be able to be melted by the gas jetted from the discharge valve, and let the gas jet out.
　以上の電源装置は、電池セルとポッティング樹脂を密着させ、電池セルの熱エネルギーを効率よく放熱しながら、排出弁の噴出ガスをスムーズに排出して高い安全性を実現できる特徴がある。以上の電源装置が電池セルの熱を効率よく放熱できるのは、電池集合体にポッティング樹脂を密着させ、ポッティング樹脂が電池セルの熱エネルギーを外部に放熱するからである。また、排出弁から噴射される噴出ガスを電池セルからスムーズに排出できるのは、電池集合体にポッティング樹脂を密着させながら、絶縁スペースには閉塞カバーを配置し、この閉塞カバーで排出弁の排出口を塞いでポッティング樹脂の流入を阻止するが、閉塞カバーを噴出ガスで溶融される独立気泡の発泡体とするからである。噴出ガスで溶融される独立気泡の発泡体からなる閉塞カバーは、ポッティング樹脂の流入を確実に阻止しながら、無数の気泡によって空隙率を著しく大きくできるので、実質的に溶融される質量を極めて減少でき、排出口から噴射される高温・高圧の噴出ガスで速やかに溶融されて、噴出ガスを速やかに排出できる特徴がある。 The above power supply device is characterized in that the battery cell and the potting resin are in close contact with each other, the thermal energy of the battery cell can be dissipated efficiently, and the jetted gas of the discharge valve can be smoothly discharged to realize high safety. The power supply device described above can efficiently dissipate the heat of the battery cells because the potting resin is in close contact with the battery assembly, and the potting resin dissipates the heat energy of the battery cells to the outside. In addition, it is possible to smoothly discharge the gas jetted from the discharge valve from the battery cell, by placing a blocking cover in the insulating space while bringing the potting resin into close contact with the battery assembly, and discharging the discharge valve with this blocking cover. Although the outlet is closed to prevent the inflow of potting resin, the closed cover is a foam of closed cells which is melted by the blow gas. The closed cover made of closed-cell foam that is melted by the blow gas substantially reduces the mass to be melted substantially because the porosity can be significantly increased by the innumerable bubbles while reliably preventing the inflow of potting resin. It is characterized in that it can be rapidly melted by the high temperature and high pressure jetted gas injected from the discharge port, and the jetted gas can be discharged quickly.
　さらに、以上の電源装置は、閉塞カバーで排出弁の排出口を塞ぐ状態でポッティング樹脂を充填できるので、ポッティング樹脂が排出弁の排出口を塞ぐのを確実に阻止して、ポッティング樹脂を電池セルの放熱に好ましい位置に充填しながら、ポッティング樹脂を簡単かつ容易に、しかも能率よく充填して効率よく多量生産できる特徴がある。したがって、以上の電源装置は、ポッティング樹脂で優れた放熱特性を実現し、さらに排出弁の排出口がポッティング樹脂で閉塞されるのを阻止しながら、噴出ガスをスムーズに排出することで、高い安全性を実現する特徴も実現する。 Furthermore, since the above power supply device can be filled with the potting resin in a state where the discharge cover of the discharge valve is closed by the closing cover, the potting resin is reliably prevented from closing the discharge port of the discharge valve. It is characterized in that the potting resin can be easily, easily and efficiently filled and efficiently mass-produced while filling at a position preferable for heat dissipation. Therefore, the above power supply device realizes excellent heat radiation characteristics with potting resin, and further prevents the exhaust valve from being blocked by the potting resin, and smoothly discharges the jetted gas, thereby providing high safety. It also realizes the feature to realize the nature.
　また、第２の側面に係る電源装置によれば、上記構成に加えて、前記閉塞カバーの溶融温度を１００℃以上であって５００℃以下とすることができる。 Moreover, according to the power supply device which concerns on a 2nd side surface, in addition to the said structure, the melting temperature of the said closure cover can be 100 degreeC or more and 500 degrees C or less.
　さらに、第３の側面に係る電源装置によれば、上記何れかの構成に加えて、前記閉塞カバーをゴム状弾性体の絶縁材とすることができる。 Furthermore, according to the power supply device concerning the 3rd side, in addition to either of the above-mentioned composition, the closing cover can be used as the insulating material of a rubbery elastic body.
　さらに、第４の側面に係る電源装置によれば、上記何れかの構成に加えて、前記閉塞カバーを、合成ゴムと軟質プラスチックの何れかの発泡体とすることができる。 Furthermore, according to the power supply device according to the fourth aspect, in addition to any one of the above-described configurations, the closing cover can be made of a foam made of either synthetic rubber or soft plastic.
　さらに、第５の側面に係る電源装置によれば、上記何れかの構成に加えて、前記閉塞カバーが、前記絶縁スペースの外周部を閉塞する外周枠部を有し、前記ポッティング樹脂を前記外周枠部の外側に充填すると共に、前記外周枠部の内側に排気チャンバーを設けて、前記排気チャンバーに前記排出弁の排出口を開口することができる。 Furthermore, according to the power supply device according to the fifth aspect, in addition to any of the above configurations, the closing cover has an outer peripheral frame that closes the outer peripheral part of the insulating space, and the potting resin The exhaust chamber can be provided inside the outer peripheral frame while filling the outer side of the frame, and the exhaust port of the exhaust valve can be opened in the exhaust chamber.
本発明の一実施形態に係る電源装置を示す垂直断面図である。It is a vertical sectional view showing a power supply device concerning one embodiment of the present invention. 図１の電源装置の要部拡大断面図である。It is a principal part expanded sectional view of the power supply device of FIG. 図１の電源装置のＩＩＩ－ＩＩＩ線断面図である。It is the III-III sectional view taken on the line of the power supply device of FIG. 図１の電源装置の電池集合体の分解斜視図である。It is a disassembled perspective view of the battery assembly of the power supply device of FIG. 図４に示す閉塞カバーの分解斜視図である。It is a disassembled perspective view of the closure cover shown in FIG.
　以下、本発明の実施の形態を図面に基づいて説明する。ただし、以下に示す実施の形態は、本発明の技術思想を具体化するための構成を例示するものであって、本発明は以下のものに特定されない。また、特許請求の範囲に示される部材を、実施の形態の部材に特定するものでは決してない。特に実施の形態に記載されている構成部材の寸法、材質、形状、その相対的配置等は、特に特定的な記載がない限りは、本発明の範囲をそれのみに限定する趣旨ではなく、単なる説明例にすぎない。なお、各図面が示す部材の大きさや位置関係等は、説明を明確にするため誇張していることがある。さらに以下の説明において、同一の名称、符号については同一もしくは同質の部材を示しており、詳細説明を適宜省略する。さらに、本発明を構成する各要素は、複数の要素を同一の部材で構成して一の部材で複数の要素を兼用する態様としてもよいし、逆に一の部材の機能を複数の部材で分担して実現することもできる。また、一部の実施例、実施形態において説明された内容は、他の実施例、実施形態等に利用可能なものもある。 Hereinafter, embodiments of the present invention will be described based on the drawings. However, the embodiments shown below exemplify the configuration for embodying the technical concept of the present invention, and the present invention is not specified to the following. Moreover, the members shown in the claims are not limited to the members of the embodiment. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the constituent members described in the embodiments are not intended to limit the scope of the present invention thereto alone, unless specifically described otherwise. It is only an illustrative example. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for the sake of clarity. Further, in the following description, the same names and reference numerals indicate the same or the same members, and the detailed description will be appropriately omitted. Furthermore, each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and one member is used in common as a plurality of elements, or conversely the function of one member is realized by a plurality of members It can be shared and realized. In addition, the contents described in some examples and embodiments may be applicable to other examples and embodiments.
　以下に示す電源装置は、主として、モータのみで走行する電気自動車や電動カートなどの電動車両の駆動用電源に適用する例を説明する。なお本発明の電源装置を、エンジンとモータの両方で走行するハイブリッド車に使用したり、電動車両以外の大出力が要求される用途、例えば家庭用、工場用の蓄電装置等に使用してもよい。
（実施形態１） The power supply device shown below mainly demonstrates the example applied to the drive power supply of electric vehicles, such as an electric vehicle and an electric cart which drive | works only by a motor. It should be noted that the power supply device of the present invention may be used in a hybrid vehicle traveling with both an engine and a motor, or in applications requiring a large output other than electric vehicles, for example, storage devices for home use and factories Good.
(Embodiment 1)
　図１～図３に示す電源装置１００は、外装ケース９に電池集合体４０を内蔵している。電池集合体４０は、一対の電池ユニット４０Ａを備えており、一対の電池ユニット４０Ａを対向位置（図１において左右）に配置して連結している。
（電池ユニット４０Ａ） The power supply device 100 shown in FIGS. 1 to 3 has a battery assembly 40 built in an exterior case 9. The battery assembly 40 includes a pair of battery units 40A, and arranges and connects the pair of battery units 40A at opposing positions (left and right in FIG. 1).
(Battery unit 40A)
　電池ユニット４０Ａは、図１及び図４に示すように、複数の二次電池セル１を平行姿勢に並べて、両端を同一平面に配置して、両端の端部電極１３にリード板４５を接続している。電池集合体４０は、対向位置に配置する一対の電池ユニット４０Ａを二次電池セル１の軸方向に並べて配置すると共に、一対の電池ユニット４０Ａの間に絶縁スペース６を設けている。各々の電池ユニット４０Ａは、図２の拡大断面図に示すように、絶縁スペース６の対向位置に端部電極１３を配置している。
（二次電池セル１） As shown in FIGS. 1 and 4, battery unit 40A arranges a plurality of secondary battery cells 1 in a parallel posture, arranges both ends in the same plane, and connects lead plate 45 to end electrodes 13 at both ends. ing. The battery assembly 40 arranges a pair of battery units 40A arranged at opposing positions in the axial direction of the secondary battery cell 1, and also provides an insulating space 6 between the pair of battery units 40A. Each battery unit 40A arrange | positions the edge part electrode 13 in the opposing position of the insulation space 6, as shown to the enlarged sectional view of FIG.
(Secondary battery cell 1)
　二次電池セル１は、設定圧力で開弁する排出弁の排出口（図視せず）を端面に設けている。二次電池セル１は両端に端部電極１３を設けている。この二次電池セル１は、アルミニウム等の金属製外装缶の開口部を封口板で気密に密閉して、封口板に凸部電極を設けて第１の端部電極１３Ａとし、外装缶の底面を第２の端部電極１３Ｂとしている。排出弁の排出口は、凸部電極側に設けられ、あるいは外装缶の底面に設けられる。 The secondary battery cell 1 is provided at its end face with a discharge port (not shown) of a discharge valve that opens at a set pressure. The secondary battery cell 1 is provided with end electrodes 13 at both ends. In the secondary battery cell 1, the opening of a metal outer can such as aluminum is hermetically sealed with a sealing plate, and a convex electrode is provided on the sealing plate to form a first end electrode 13A, and the bottom of the outer can As a second end electrode 13B. The discharge port of the discharge valve is provided on the convex electrode side or on the bottom surface of the outer can.
　二次電池セル１は、円筒形電池のリチウムイオン電池である。リチウムイオン電池は、大きさや重量に対する容量が大きく、電源装置１００のトータル容量を大きくできる。ただし、本発明の電源装置は、二次電池セルをリチウムイオン電池には特定しない。二次電池セルには、充電できる他の二次電池が使用できる。また、図１の電源装置１００は、二次電池セル１を円筒形電池とするが、二次電池セルには角形電池も使用できる。各々の二次電池セル１は、その両端の端部電極１３にリード板４５を溶接して、隣接する二次電池セル１を直列又は並列に接続している。
（電池ホルダ４４） The secondary battery cell 1 is a cylindrical lithium ion battery. The lithium ion battery has a large capacity with respect to size and weight, and can increase the total capacity of the power supply device 100. However, the power supply device of the present invention does not specify the secondary battery cell as a lithium ion battery. Other secondary batteries that can be charged can be used for the secondary battery cell. Moreover, although the power supply apparatus 100 of FIG. 1 makes the secondary battery cell 1 a cylindrical battery, a square battery can also be used for a secondary battery cell. In each of the secondary battery cells 1, a lead plate 45 is welded to the end electrodes 13 at both ends thereof, and the adjacent secondary battery cells 1 are connected in series or in parallel.
(Battery holder 44)
　二次電池セル１は、図４に示すように、電池ホルダ４４で定位置に配置している。電池ホルダ４４はプラスチック等の絶縁材を成形して制作される。図の電池ホルダ４４は、すべての二次電池セル１を平行な姿勢で定位置に配置している。電池ホルダ４４で定位置に配置される二次電池セル１は、その両端にリード板４５を溶接するので、各々の端部に溶接されるリード板４５を同一面に位置するように、各々の二次電池セル１をその両端部がほぼ同一面に位置するように、電池ホルダ４４に配置している。 The secondary battery cell 1 is disposed at a fixed position by the battery holder 44 as shown in FIG. The battery holder 44 is manufactured by molding an insulating material such as plastic. The illustrated battery holder 44 arranges all the secondary battery cells 1 at a fixed position in a parallel posture. Since the secondary battery cells 1 arranged at a fixed position by the battery holder 44 have the lead plates 45 welded to both ends, each lead plate 45 to be welded to each end is positioned in the same plane. The secondary battery cell 1 is disposed in the battery holder 44 so that both ends thereof are positioned substantially in the same plane.
　電池ホルダ４４は、二次電池セル１を挿入して定位置に配置する挿入部４４Ａを設けている。図の電源装置１００は、二次電池セル１を円筒形電池とするので、挿入部４４Ａを円柱状としている。電池ホルダ４４は、プラスチックを筒状に成形して内側に挿入部４４Ａを設けている。挿入部４４Ａは、電池端部を露出させる開口部４４Ｂを両端に設けている。開口部４４Ｂは、挿入部４４Ａに挿入される二次電池セル１の端部を挿入部４４Ａから外部に露出させる。開口部４４Ｂに露出される二次電池セル１の端面は、端部電極１３となってここにリード板４５が溶接して固定される。
（ポッティング樹脂７） The battery holder 44 is provided with the insertion part 44A which inserts the secondary battery cell 1 and arrange | positions in a fixed position. In the power supply device 100 shown in the figure, since the secondary battery cell 1 is a cylindrical battery, the insertion portion 44A has a cylindrical shape. The battery holder 44 has a cylindrical plastic shape and is provided with the insertion portion 44A inside. The insertion portion 44A is provided at both ends with openings 44B for exposing the battery end. The opening 44B exposes the end of the secondary battery cell 1 inserted into the insertion portion 44A to the outside from the insertion portion 44A. The end face of the secondary battery cell 1 exposed to the opening 44B becomes the end electrode 13 and the lead plate 45 is welded and fixed here.
(Potting resin 7)
　電池集合体４０は、ポッティング樹脂７に密着されて、二次電池セル１の熱エネルギーをポッティング樹脂７に伝導して放熱する。ポッティング樹脂７は、電池表面に直接に密着し、あるいは電池ホルダ４４やリード板４５を介して二次電池セル１に密着されて二次電池セル１の熱を放熱する。ポッティング樹脂７は、たとえば、電池集合体４０を防水袋７５に入れ、防水袋７５に未硬化で液状のポッティング樹脂７を充填し、ポッティング樹脂７を硬化させて電池集合体４０に密着状態となる。ただし、本発明は、ポッティング樹脂７を電池集合体４０の二次電池セル１や電池ホルダ４４等に密着する構造や方法を特定するものでないので、電池集合体を外装ケースに入れてポッティング樹脂を外装ケースに充填して密着することができ、また、ポッティング樹脂を充填するスペースを電池ホルダに設け、あるいは又ポッティング樹脂を充填する筐体に電池集合体を入れて充填することもできる。ポッティング樹脂７は、電池集合体４０の電池表面などに密着する熱伝導面積を広くして、二次電池セル１を効果的に放熱できる。未硬化のポッティング樹脂７は液状で、充填されて狭い隙間にも浸入するので、二次電池セル１の端面に溶接しているリード板４５の開口部や二次電池セル１との隙間から浸入して二次電池セル１の表面に密着される。 The battery assembly 40 is in close contact with the potting resin 7 and conducts heat energy of the secondary battery cell 1 to the potting resin 7 to dissipate heat. The potting resin 7 is in close contact with the battery surface directly or in close contact with the secondary battery cell 1 via the battery holder 44 and the lead plate 45 to dissipate the heat of the secondary battery cell 1. For example, the potting resin 7 puts the battery assembly 40 in the waterproof bag 75, fills the waterproof bag 75 with the uncured liquid potting resin 7, cures the potting resin 7, and adheres to the battery assembly 40. . However, since the present invention does not specify the structure or method for closely adhering the potting resin 7 to the secondary battery cell 1 of the battery assembly 40, the battery holder 44, etc., the battery assembly is put in the outer case and the potting resin is The battery case can be filled and closely attached, and a space for filling the potting resin can be provided in the battery holder, or alternatively, the battery assembly can be placed and filled in a case for filling the potting resin. The potting resin 7 can widen the heat conduction area in close contact with the battery surface of the battery assembly 40 and the like, and can effectively dissipate the heat of the secondary battery cell 1. The uncured potting resin 7 is in a liquid state, and is filled and infiltrates into a narrow gap. Therefore, it penetrates from the opening of the lead plate 45 welded to the end face of the secondary battery cell 1 and the gap with the secondary battery cell 1 Then, it is in close contact with the surface of the secondary battery cell 1.
　図１に示すように、一対の電池ユニット４０Ａの間に絶縁スペース６を設けて、絶縁スペース６の両側に二次電池セル１の端面を配置する電池集合体４０は、排出弁の排出口が絶縁スペース６に露出する。排出弁が開弁すると、排出口からは高温の噴出ガスが噴射される。絶縁スペース６にポッティング樹脂７が充填されると、ポッティング樹脂７が排出弁の排出口を閉塞して噴出ガスの排出を阻害する。また、排出口から内部に浸入するポッティング樹脂７は、排出弁の正常な動作を阻害する。電源装置は、二次電池セル１の内圧が異常に高くなると排出弁を開いて二次電池セル１の破裂を防止するので、噴出ガスをスムーズに排出できない構造は、たとえ二次電池セル１の熱を効率よく放熱できるとしても、高い安全性は確保できない。
（閉塞カバー６１） As shown in FIG. 1, the battery assembly 40 in which the insulating space 6 is provided between the pair of battery units 40A and the end faces of the secondary battery cells 1 are disposed on both sides of the insulating space 6 has a discharge port of the discharge valve. Exposed to the insulating space 6. When the discharge valve is opened, high temperature jetted gas is injected from the discharge port. When the insulating space 6 is filled with the potting resin 7, the potting resin 7 blocks the discharge port of the discharge valve to inhibit the discharge of the jetted gas. In addition, the potting resin 7 which intrudes into the interior from the discharge port inhibits the normal operation of the discharge valve. The power supply device opens the discharge valve to prevent the rupture of the secondary battery cell 1 when the internal pressure of the secondary battery cell 1 becomes abnormally high, so that the structure in which the jetted gas can not be discharged smoothly is similar to that of the secondary battery cell 1 Even if heat can be dissipated efficiently, high safety can not be ensured.
(Occlusion cover 61)
　電源装置１００は、ポッティング樹脂７が排出弁の排出口を閉塞しないように、絶縁スペース６に閉塞カバー６１を配置している。電源装置１００の閉塞カバー６１は、図１～図５に示すように、絶縁スペース６の外周部を閉塞する外周枠部６２を有し、この外周枠部６２でポッティング樹脂７の絶縁スペース６への注入を阻止して、ポッティング樹脂７を外周枠部６２の外側に充填して、外周枠部６２の内側に排気チャンバー６３を設けて、排気チャンバー６３に排出弁の排出口を露出させている。外周枠部６２は、絶縁スペース６の外周縁部に沿って伸びる形状で、電池ユニット４０Ａの端面に隙間なく密着して、絶縁スペース６にポッティング樹脂７が流入するのを阻止している。この構造の閉塞カバー６１は、外周枠部６２の内側に大容積の排気チャンバー６３を設けて、ここに噴出ガスを噴射できるので、噴出ガスをスムーズに排出できる特徴がある。それは、大容積の排気チャンバー６３は、排出弁の排出口から噴射される噴出ガスによる内圧上昇が緩慢で排気抵抗の上昇勾配を緩やかにできるからである。 In the power supply apparatus 100, the closing cover 61 is disposed in the insulating space 6 so that the potting resin 7 does not close the discharge port of the discharge valve. As shown in FIGS. 1 to 5, the closing cover 61 of the power supply apparatus 100 has an outer peripheral frame 62 closing the outer peripheral part of the insulating space 6, and the outer peripheral frame 62 moves to the insulating space 6 of the potting resin 7. The potting resin 7 is filled on the outer side of the outer peripheral frame 62, and the exhaust chamber 63 is provided inside the outer peripheral frame 62 to expose the exhaust port of the exhaust valve to the exhaust chamber 63. . The outer peripheral frame portion 62 has a shape extending along the outer peripheral edge portion of the insulating space 6, closely in contact with the end face of the battery unit 40A without a gap, and prevents the potting resin 7 from flowing into the insulating space 6. The closed cover 61 having this structure is characterized in that a large volume exhaust chamber 63 is provided inside the outer peripheral frame 62 and the jetted gas can be jetted here, so that the jetted gas can be smoothly discharged. The reason is that the large-volume exhaust chamber 63 has a slow rise in internal pressure due to the gas jetted from the discharge port of the discharge valve, and can make the rise gradient of the exhaust resistance gentle.
　閉塞カバー６１は、排出弁から排出される噴出ガスで溶融する独立気泡を有する絶縁材の発泡体で成形される。噴出ガスで溶融される閉塞カバー６１の溶融温度は、たとえば１００℃以上であって５００℃以下、好ましくは２００℃以上であって４００℃以下とする。溶融温度の低い閉塞カバー６１は、噴出ガスで速やかに溶融して噴出ガスを絶縁スペース６の外部に排出し、溶融温度の高い閉塞カバー６１は、使用状態において確実に絶縁スペース６を閉塞できる。閉塞カバー６１の溶融温度が低すぎると、電池温度で溶融し、あるいは変形し、また高すぎると噴出ガスで速やかに溶融できなくなる。したがって、閉塞カバー６１の溶融温度は、噴出ガスでは速やかに溶融し、かつ噴出ガスが噴射されない状態では変形したり溶融しない温度特性を考慮して、先述の範囲に設定される。 The closing cover 61 is formed of a foam of an insulating material having closed cells which are melted by the gas discharged from the discharge valve. The melting temperature of the blocking cover 61 melted by the jet gas is, for example, 100 ° C. or more and 500 ° C. or less, preferably 200 ° C. or more and 400 ° C. or less. The closing cover 61 having a low melting temperature can be quickly melted by the jetted gas to discharge the jetted gas to the outside of the insulating space 6, and the closing cover 61 having a high melting temperature can block the insulating space 6 reliably in use. If the melting temperature of the blocking cover 61 is too low, it will melt or deform at the battery temperature, and if too high, it will not be possible to quickly melt it with the jet gas. Therefore, the melting temperature of the closing cover 61 is set in the above-mentioned range in consideration of the temperature characteristic which is promptly melted in the jetted gas and does not deform or melt in the state where the jetted gas is not jetted.
　噴出ガスで溶融する閉塞カバー６１は、液状のポッティング樹脂７を充填する工程では溶融されずにポッティング樹脂７の絶縁スペース６への流入を阻止し、開弁した排出弁から噴射される高温の噴出ガスで溶融される。溶融された閉塞カバー６１は絶縁スペース６を外部に開放して、噴射される噴出ガスを図２及び図３の矢印で示すように、絶縁スペース６から排出する。絶縁材の閉塞カバー６１は、電池ユニット４０Ａの端部電極１３側に密着して、絶縁スペース６を閉塞できる。とくに、端部電極１３側には金属板のリード板４５を配置しているので、絶縁材の閉塞カバー６１はリード板４５に密着して、リード板４５を短絡することなく絶縁スペース６を閉塞できる。さらに、独立気泡を有する発泡体の閉塞カバー６１は、単位体積に対する重量が小さく、密度を低くできるので、高温の噴出ガスで速やかに溶融されて、噴出ガスを絶縁スペース６から速やかに外部に排出できる特徴がある。さらに発泡体の閉塞カバー６１は、成形時の発泡倍率をコントロールしてより低比重化できるので、噴出ガスによる溶融時間を極めて短縮することができる。 The closed cover 61 melted by the jetted gas prevents the flow of the potting resin 7 into the insulating space 6 without being melted in the step of filling the liquid potting resin 7 and jets high temperature jetted from the opened discharge valve. It is melted by gas. The melted closing cover 61 opens the insulating space 6 to the outside, and the jetted gas to be injected is discharged from the insulating space 6 as shown by the arrows in FIGS. 2 and 3. The closing cover 61 made of an insulating material is in close contact with the end portion electrode 13 side of the battery unit 40A, so that the insulating space 6 can be closed. In particular, since the lead plate 45 of a metal plate is disposed on the side of the end electrode 13, the closing cover 61 of the insulating material is in close contact with the lead plate 45, and the insulating space 6 is closed without shorting the lead plate 45. it can. Furthermore, since the closed cover 61 of the foam having closed cells has a small weight per unit volume and can reduce the density, it is rapidly melted by the high-temperature jetted gas, and the jetted gas is rapidly discharged to the outside from the insulating space 6 There is a feature that can be done. Furthermore, since the closed cover 61 of the foam can be made to have a lower specific gravity by controlling the foaming ratio at the time of molding, the melting time by the jet gas can be extremely shortened.
　閉塞カバー６１は、ゴム状弾性体の発泡体で成形している。ゴム状弾性体の閉塞カバー６１は、たとえば合成ゴム発泡体や軟質のプラスチック発泡体で成形される。合成ゴム発泡体はプロピレンゴムが使用できる。軟質のプラスチック発泡体には、たとえば軟質ウレタン発泡体が使用できる。ゴム状弾性体の閉塞カバー６１は、一対の電池ユニット４０Ａの間に配置し、両側の電池ユニット４０Ａで押圧し、圧縮される状態に弾性変形させることで、電池ユニット４０Ａの対向面４０ａに密着する。電池ユニット４０Ａの対向面４０ａに密着する閉塞カバー６１は、絶縁スペース６に注入される液状のポッティング樹脂７が絶縁スペース６に浸入するのを確実に阻止できる特徴がある。とくに、絶縁スペース６との対向面４０ａにリード板４５を固定している電池ユニット４０Ａは、リード板４５によって対向面４０ａに凹凸や隙間ができるが、弾性変形して密着する閉塞カバー６１は、凹凸を吸収し、隙間を閉塞してポッティング樹脂７の絶縁スペース６への浸入を確実に阻止できる特徴がある。さらに、独立気泡を有する発泡体からなるゴム状弾性体の閉塞カバー６１は、無数の気泡でより柔軟化されて変形できる自由度が大きくなり、凹凸のある電池ユニット４０Ａの対向面４０ａに隙間なく密着し、また隙間を閉塞して絶縁スペース６へのポッティング樹脂７の流入をより確実に阻止できる特徴がある。さらに、ゴム状弾性体の発泡体からなる閉塞カバー６１は、弾性変形して電池ユニット４０Ａの対向面４０ａに密着する状態で、電池ユニット４０Ａの対向面４０ａの押圧力を小さくできる。したがって、電池ユニット４０Ａの対向面４０ａに密着しながら、電池ユニット４０Ａに無理な応力を作用させることなく、絶縁スペース６を確実に閉塞できる特徴がある。 The closing cover 61 is formed of a rubber-like elastic foam. The rubber-like elastic closure cover 61 is formed of, for example, a synthetic rubber foam or a soft plastic foam. Propylene rubber can be used as the synthetic rubber foam. For example, a soft urethane foam can be used for the soft plastic foam. The closing cover 61 made of a rubber-like elastic body is disposed between the pair of battery units 40A, pressed by the battery units 40A on both sides, and elastically deformed in a compressed state to be in close contact with the opposing surface 40a of the battery unit 40A. Do. The closing cover 61 in close contact with the facing surface 40 a of the battery unit 40 A is characterized in that the liquid potting resin 7 injected into the insulating space 6 can be reliably prevented from entering the insulating space 6. In particular, in the battery unit 40A in which the lead plate 45 is fixed to the facing surface 40a with the insulating space 6, the lead plate 45 forms asperities and gaps on the facing surface 40a. It is characterized in that the unevenness can be absorbed and the gap can be closed to surely prevent the potting resin 7 from invading the insulating space 6. Furthermore, the closed cover 61 of the rubber-like elastic body made of the foam having the closed cells has a greater degree of freedom to be softened and deformed by the innumerable air bubbles, and there is no gap on the facing surface 40a of the battery unit 40A having unevenness. It is characterized in that it adheres tightly and closes the gap to prevent the potting resin 7 from flowing into the insulating space 6 more reliably. Further, the closing cover 61 made of a rubber elastic body can be elastically deformed to be in close contact with the facing surface 40a of the battery unit 40A, thereby reducing the pressing force of the facing surface 40a of the battery unit 40A. Therefore, there is a feature that the insulating space 6 can be reliably closed without causing an excessive stress on the battery unit 40A while in close contact with the facing surface 40a of the battery unit 40A.
　ただ、本発明の電源装置は、閉塞カバー６１を必ずしもゴム状弾性体で成形する必要はない。それは、閉塞カバー６１と電池ユニット４０Ａの対向面４０ａとの間に弾性変形するパッキンを配置し、あるいはシール材を塗布して、閉塞カバー６１を電池ユニット４０Ａの対向面４０ａに隙間なく密着することができるからである。 However, in the power supply device of the present invention, the closing cover 61 does not necessarily have to be formed of a rubber-like elastic body. In this method, a packing that elastically deforms is disposed between the closing cover 61 and the facing surface 40a of the battery unit 40A, or a sealing material is applied to closely attach the closing cover 61 to the facing surface 40a of the battery unit 40A. It is because
　図１～図３の電源装置１００は、閉塞カバー６１に外周枠部６２を設けて、外周枠部６２の内側に排気チャンバー６３を設けているが、本発明は閉塞カバー６１をこの形状に特定するものでない。たとえば、図示しないが、閉塞カバーは、二次電池セルの排出弁の排出口との対向面に凹部を設けた板状の発泡体に成形し、あるいは、絶縁スペースに隙間なく配設されて、排気チャンバーを設けない板状に成形して排出弁の排出口を塞ぐこともできる。これ等の形状の閉塞カバーは、発泡体の発泡倍率を高くして閉塞カバー内部の空隙率を高くし、また溶融温度を低くして高温の噴出ガスによる溶融時間を短縮して、絶縁スペースに噴射される噴出ガスを速やかに外部に排出する。
（耐熱シート６４） Although the power supply apparatus 100 of FIGS. 1 to 3 has the outer peripheral frame 62 provided on the closing cover 61 and the exhaust chamber 63 provided inside the outer peripheral frame 62, the present invention identifies the closing cover 61 in this shape. It is not something to do. For example, although not shown, the closing cover is formed into a plate-like foam in which a recess is provided on the surface facing the discharge port of the discharge valve of the secondary battery cell, or it is disposed without gaps in the insulating space, It is also possible to form a plate without the exhaust chamber to close the outlet of the outlet valve. In these forms of the closure cover, the expansion ratio of the foam is increased to increase the porosity inside the closure cover, and the melting temperature is lowered to shorten the melting time by the high-temperature jetted gas, thereby providing an insulating space. Immediately discharge the jetted gas to the outside.
(Heat resistant sheet 64)
　図１及び図２の電源装置１００は、絶縁スペース６の中間に耐熱シート６４を配置し、耐熱シート６４の両側に閉塞カバー６１を配置して、閉塞カバー６１を耐熱シート６４と電池ユニット４０Ａとの間に配置している。耐熱シート６４は噴出ガスが溶融されない耐熱特性のシートで、絶縁スペース６に噴射される噴出ガスから対向する二次電池セル１を保護して、二次電池セル１の熱暴走を防止する。耐熱シート６４は絶縁性のシートで、その両面、すなわち絶縁スペース６の対向面４０ａに配置される電池ユニット４０Ａのリード板４５の短絡を防止する。耐熱シート６４には、難燃処理した絶縁紙や絶縁性の耐熱繊維を集合した紙や不織布が使用できる。これ等の耐熱シート６４は薄くできるので、耐熱シート６４が絶縁スペース６の実質容積を減少することなく絶縁スペース６を広くして噴出ガスをスムーズに排出できる特徴がある。 The power supply apparatus 100 of FIG. 1 and FIG. 2 arranges the heat resistant sheet 64 in the middle of the insulating space 6, arranges the closing cover 61 on both sides of the heat resistant sheet 64, and forms the closing cover 61 with the heat resistant sheet 64 and the battery unit 40A. Are placed between The heat-resistant sheet 64 is a sheet having a heat-resistant property in which the jetted gas is not melted, and protects the opposing secondary battery cell 1 from the jetted gas injected into the insulating space 6 to prevent thermal runaway of the secondary battery cell 1. The heat-resistant sheet 64 is an insulating sheet, and prevents short circuiting of the lead plates 45 of the battery unit 40A disposed on the opposite surface 40a of the both surfaces, ie, the insulating space 6. For the heat-resistant sheet 64, it is possible to use flame-retardant treated insulating paper or paper or non-woven fabric in which insulating heat-resistant fibers are collected. Since these heat-resistant sheets 64 can be made thin, the heat-resistant sheets 64 can widen the insulating space 6 without reducing the substantial volume of the insulating space 6 and can discharge the jetted gas smoothly.
　さらに、図１及び図３の電源装置１００は、図２及び図５に示すように、閉塞カバー６１の外周枠部６２の表面と耐熱シート６４の表面とに絶縁シート６５を積層している。絶縁シート６５はプラスチック製で、耐熱シート６４の両面に閉塞カバー６１を配置して、耐熱シート６４と両側の閉塞カバー６１とを一体構造に連結して、絶縁スペース６に配設される板状の絶縁スペーサ６０としている。絶縁スペーサ６０は、一対の電池ユニット４０Ａの間に挟む状態で配置されて、閉塞カバー６１と耐熱シート６４とを絶縁スペース６の定位置に配置する。したがって、この構造は組み立て工程を簡単にして能率よく多量生産して、耐熱シート６４と閉塞カバー６１とを正確な位置に配置できる特徴がある。 Furthermore, as shown in FIGS. 2 and 5, the power supply device 100 of FIGS. 1 and 3 has the insulating sheet 65 laminated on the surface of the outer peripheral frame 62 of the closing cover 61 and the surface of the heat resistant sheet 64. The insulating sheet 65 is made of plastic, and the closing covers 61 are disposed on both sides of the heat resistant sheet 64, and the heat resistant sheet 64 and the closing covers 61 on both sides are integrally connected to each other. As the insulating spacer 60 of FIG. The insulating spacer 60 is disposed in a state of being sandwiched between the pair of battery units 40A, and arranges the closing cover 61 and the heat-resistant sheet 64 at a predetermined position of the insulating space 6. Therefore, this structure is characterized in that the assembly process is simplified and mass production is efficiently performed, and the heat-resistant sheet 64 and the closing cover 61 can be disposed at the correct positions.
　本発明の電源装置は、内蔵する多数の二次電池セルを効率よく放熱しながら、高い安全性が要求される用途に便利に使用される。 The power supply device of the present invention is conveniently used for applications requiring high safety while efficiently radiating a large number of built-in secondary battery cells.
１００…電源装置
１…二次電池セル
６…絶縁スペース
７…ポッティング樹脂
９…外装ケース
１３…端部電極第
１３Ａ…第１の端部電極
１３Ｂ…第２の端部電極
４０…電池集合体
４０Ａ…電池ユニット
４０ａ…対向面
４４…電池ホルダ
４４Ａ…挿入部
４４Ｂ…開口部
４５…リード板
６０…絶縁スペーサ
６１…閉塞カバー
６２…外周枠部
６３…排気チャンバー
６４…耐熱シート
６５…絶縁シート
７５…防水袋
  100 Power supply device 1 Secondary battery cell 6 Insulating space 7 Potting resin 9 Outer case 13 End electrode 13A First end electrode 13B Second end electrode 40 Battery assembly 40A ... Battery unit 40a ... Opposite surface 44 ... Battery holder 44A ... Insertion section 44B ... Opening 45 ... Lead plate 60 ... Insulating spacer 61 ... Occlusion cover 62 ... Outer peripheral frame 63 ... Exhaust chamber 64 ... Heat resistant sheet 65 ... Insulating sheet 75 ... Waterproof bag

Claims (5)

  1. 　設定圧力で開弁する排出弁の開口部を端面に配置してなる複数の電池セルを平行姿勢であって両端を同一平面に配置してなる電池ユニットが、絶縁スペースを介して前記電池セルの端面を対向して配置して、前記絶縁スペースに排出弁の排出口を配置してなる電池集合体と、
    　前記電池集合体に密着してなるポッティング樹脂と、
    　前記絶縁スペース内に配置されて、前記排出弁の開口部を覆う閉塞カバーとを備え、
    　前記閉塞カバーは、前記電池セルの排出弁から排出される噴出ガスで溶融する独立気泡を有する絶縁材の発泡体で、
    　前記閉塞カバーが、前記ポッティング樹脂の前記排出弁の開口部への流入を阻止し、かつ前記排出弁からの噴出ガスで溶融して噴出ガスを通過させるようにしてなることを特徴とする電源装置。     A battery unit having a plurality of battery cells arranged at the end face with the opening of the discharge valve opening at the set pressure in a parallel posture and having both ends arranged in the same plane is the battery cell of the battery cell via the insulating space. A battery assembly in which the end faces are disposed to face each other, and the discharge space of the discharge valve is disposed in the insulating space;
    Potting resin in close contact with the battery assembly;
    An occlusion cover disposed in the insulating space and covering an opening of the discharge valve;
    The closing cover is a foam of an insulating material having closed cells which are melted by the gas discharged from the discharge valve of the battery cell.
    The power supply apparatus characterized in that the closing cover prevents the potting resin from flowing into the opening of the discharge valve and is melted by the gas jetted from the discharge valve to allow the jetted gas to pass therethrough. .
  2. 　請求項１に記載される電源装置であって、
    　前記閉塞カバーの溶融温度が１００℃以上であって５００℃以下であることを特徴とする電源装置。     The power supply device according to claim 1, wherein
    The power supply apparatus characterized in that the melting temperature of the closing cover is 100 ° C. or more and 500 ° C. or less.
  3. 　請求項１又は２に記載される電源装置であって、
    　前記閉塞カバーがゴム状弾性体の絶縁材としてなることを特徴とする電源装置。     The power supply device according to claim 1 or 2, wherein
    The power supply apparatus characterized in that the closing cover is an insulating material of a rubber-like elastic body.
  4. 　請求項３に記載される電源装置であって、
    　前記閉塞カバーが、合成ゴムと軟質プラスチックの何れかの発泡体であることを特徴とする電源装置。     The power supply device according to claim 3,
    The power supply apparatus characterized in that the closing cover is a foam made of either synthetic rubber or soft plastic.
  5. 　請求項１ないし４のいずれかに記載される電源装置であって、
    　前記閉塞カバーが、前記絶縁スペースの外周部を閉塞する外周枠部を有し、前記ポッティング樹脂が前記外周枠部の外側に充填されると共に、前記外周枠部の内側に排気チャンバーが設けられ、前記排気チャンバーに前記排出弁の排出口が開口されてなることを特徴とする電源装置。
          The power supply device according to any one of claims 1 to 4, wherein
    The closing cover has an outer peripheral frame that closes the outer peripheral part of the insulating space, the potting resin is filled on the outer side of the outer peripheral frame, and an exhaust chamber is provided inside the outer peripheral frame. A power supply apparatus characterized in that a discharge port of the discharge valve is opened in the exhaust chamber.
PCT/JP2018/032648 2017-09-29 2018-09-03 Power supply device WO2019065110A1 (en)

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PH12020550163A PH12020550163A1 (en) 2017-09-29 2020-03-27 Power source apparatus

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JP7174707B2 (en) 2022-11-17

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