JP6147321B2 - Exhaust structure of lithium battery - Google Patents
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- JP6147321B2 JP6147321B2 JP2015238719A JP2015238719A JP6147321B2 JP 6147321 B2 JP6147321 B2 JP 6147321B2 JP 2015238719 A JP2015238719 A JP 2015238719A JP 2015238719 A JP2015238719 A JP 2015238719A JP 6147321 B2 JP6147321 B2 JP 6147321B2
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- 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
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Description
本発明は、リチウム電池に関し、特に、リチウム電池の排気構造に関する。 The present invention relates to a lithium battery, and more particularly to an exhaust structure of a lithium battery.
近年、電子産業の発展とともに様々な電子機器がかなり普及している。携帯用電子機器の製造においては、小型・軽量化が求められている。また、技術の進歩に伴い、携帯用電子機器では高機能化に伴う消費電力が増大している。そのため、電池の寿命を考慮して電子機器を製造することが必要である。 In recent years, various electronic devices have become quite popular with the development of the electronic industry. In the manufacture of portable electronic devices, miniaturization and weight reduction are required. In addition, with the advancement of technology, power consumption associated with higher functionality is increasing in portable electronic devices. Therefore, it is necessary to manufacture an electronic device in consideration of the battery life.
したがって、現在、携帯用電子機器の大半は、繰り返し使用することができ、高容量や高エネルギー密度を有するリチウム二次電池を主に採用している。一般に、リチウム電池は、まず、複数の正極板、複数の負極板及び複数のセパレータを積層して電池要素を形成し、次に、アルミラミネートフィルム製の封入袋により電池要素、正極導電タブ、負極導電タブ及び非水電解液（「電解液」と略称する）を封入し、最後に、充電や活性化試験、ガス抜き、電圧測定などの工程を経ることによって作成される。 Therefore, at present, most portable electronic devices can be used repeatedly and mainly employ lithium secondary batteries having high capacity and high energy density. Generally, a lithium battery is formed by first laminating a plurality of positive electrode plates, a plurality of negative electrode plates and a plurality of separators to form a battery element, and then enclosing the battery element, positive electrode conductive tab, negative electrode with an encapsulating bag made of an aluminum laminate film. A conductive tab and a nonaqueous electrolytic solution (abbreviated as “electrolytic solution”) are enclosed, and finally, a charging, activation test, degassing, voltage measurement, and the like are performed.
しかしながら、リチウム電池は、充放電に伴って封入袋内にガスが発生するため、封入袋が徐々に膨張した結果、リチウム電池の金属ケースも膨張した封入袋により変形や膨張すると、携帯用電子機器における近傍の構造が圧迫され、電池構造に悪影響を及ぼす。 However, since the lithium battery generates gas in the encapsulating bag as it is charged and discharged, if the encapsulating bag gradually expands and the metal case of the lithium battery also deforms or expands due to the expanded encapsulating bag, the portable electronic device The structure in the vicinity of the battery is pressed, adversely affecting the battery structure.
本発明は、このような事情に鑑みてなされたものであり、リチウム電池内の封入袋に一定程度のガスが発生すると、一方向排気弁により過剰なガスを直ちに排出し、リチウム電池の変形や膨張の問題を回避することが可能なリチウム電池の排気構造を提供することを目的とする。 The present invention has been made in view of such circumstances, and when a certain amount of gas is generated in an encapsulating bag in a lithium battery, excess gas is immediately discharged by a one-way exhaust valve, An object of the present invention is to provide an exhaust structure for a lithium battery that can avoid the problem of expansion.
上述の目的を達成するため、本発明の一実施形態に係るリチウム電池の排気構造は、複数の辺と当該複数の辺の間に形成される収容空間とを有する封入袋と、前記収容空間に収容される電池要素と、前記収容空間に収容されるとともに、前記電池要素と接触することでガスを生成する電解液と、前記封入袋に配置され、前記収容空間に連通して前記収容空間内からガスを排出する少なくとも１つの一方向排気弁と、を含み、前記一方向排気弁は、吸水通気部材を有し、前記収容空間内からガスを排出する際に、前記吸水通気部材が前記ガスに付着している前記電解液を吸着する。 In order to achieve the above object, an exhaust structure for a lithium battery according to an embodiment of the present invention includes an encapsulating bag having a plurality of sides and a housing space formed between the plurality of sides, and the housing space. A battery element to be housed, an electrolyte that is housed in the housing space and generates a gas by contact with the battery element, and is disposed in the enclosing bag and communicates with the housing space in the housing space. see containing at least one one-way exhaust valve for discharging gas, from the one-way exhaust valve has a water permeable member, when discharging the gas from the accommodating space, the water permeable member is the The electrolyte solution adhering to the gas is adsorbed .
本発明は、従来技術に比べてリチウム電池内の封入袋が一定程度のガスを生成すると、一方向排気弁によって過剰なガスを排出することができるという効果を奏する。 According to the present invention, when the encapsulating bag in the lithium battery generates a certain amount of gas as compared with the prior art, an excess gas can be discharged by the one-way exhaust valve.
上述の目的を達成するため、本発明の他の実施形態に係るリチウム電池の排気構造は、複数の辺と、当該複数の辺の間に形成されて互いに連通する収容空間及び吸水空間を有する封入袋と、前記収容空間に収容される電池要素と、前記収容空間に収容されるとともに、前記電池要素と接触することでガスを生成する電解液と、前記吸水空間に収容される吸水通気部材と、前記封入袋に配置され、前記吸水空間を介して前記収容空間を連通する少なくとも１つの一方向排気弁と、を含み、前記一方向排気弁は、前記吸水空間を介して前記収容空間内からガスを排出し、前記ガスに付着している前記電解液が前記吸水空間を通過する際に前記吸水通気部材によって吸着される。 In order to achieve the above-described object, an exhaust structure for a lithium battery according to another embodiment of the present invention includes a plurality of sides, an enclosing space formed between the plurality of sides and communicating with each other and a water absorption space. A bag, a battery element housed in the housing space, an electrolyte that is housed in the housing space and generates gas by contacting the battery element, and a water-absorbing ventilation member housed in the water-absorbing space And at least one one-way exhaust valve disposed in the enclosing bag and communicating with the accommodation space via the water absorption space, the one-way exhaust valve from the inside of the accommodation space via the water absorption space Gas is discharged, and the electrolytic solution adhering to the gas is adsorbed by the water-absorbing ventilation member when passing through the water-absorbing space.
本発明は、従来技術に比べてリチウム電池内の封入袋が一定程度のガスを生成すると、一方向排気弁により過剰なガスを直ちに排出することができる。さらに、吸水通気部材によってガスに付着している電解液を吸着することができるという効果を奏する。 In the present invention, when the encapsulating bag in the lithium battery generates a certain amount of gas as compared with the prior art, excess gas can be immediately discharged by the one-way exhaust valve. Furthermore, there is an effect that the electrolytic solution adhering to the gas can be adsorbed by the water absorption ventilation member.
以下、図面を参照しながら本発明の実施形態を詳細に説明する。ただし、以下の図面は本発明を説明するためのものであって、これにより本発明を限定するものではない。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the following drawings are for explaining the present invention and do not limit the present invention.
本発明は、リチウム電池の排気構造を提供するものである。図１及び図２は、それぞれ本発明の第１の実施形態及び第２の実施形態を示している。図５及び図６は、それぞれ本発明の第３の実施形態及び第４の実施形態を示している。図３及び図４は、第２の実施形態を示す他の図である。 The present invention provides an exhaust structure for a lithium battery. 1 and 2 show a first embodiment and a second embodiment of the present invention, respectively. 5 and 6 show a third embodiment and a fourth embodiment of the present invention, respectively. 3 and 4 are other views showing the second embodiment.
図１は、本発明の第１の実施形態の概略構成を示す断面図である。本発明のリチウム電池の排気構造は、封入袋１と、電池要素２と、少なくとも１つの一方向排気弁３とを含んでいる。 FIG. 1 is a cross-sectional view showing a schematic configuration of the first embodiment of the present invention. The lithium battery exhaust structure of the present invention includes an enclosing bag 1, a battery element 2, and at least one one-way exhaust valve 3.
封入袋１は、可撓性材料で形成され、複数の辺を有している。具体的に、封入袋１は、アルミラミネートフィルム製の密閉袋体であり、その密閉袋体を二つ折りとした状態で、折り辺１４以外の他の３辺を加熱押圧や粘着により封止することによって、３つの封止辺１１，１２，１３が構成されている。このように、３つの封止辺１１，１２，１３と折り辺１４との間に収容空間１６が形成されている。収容空間１６には、電解液が収容されている（図示せず）。 The encapsulating bag 1 is formed of a flexible material and has a plurality of sides. Specifically, the enclosing bag 1 is a sealed bag body made of an aluminum laminate film, and the other three sides other than the folding side 14 are sealed by heat pressing or adhesion while the sealed bag body is folded in half. Thus, three sealing sides 11, 12, and 13 are configured. As described above, the accommodation space 16 is formed between the three sealing sides 11, 12, 13 and the folding side 14. The accommodation space 16 contains an electrolytic solution (not shown).
電池要素２は、封入袋１の収容空間１６内に収容され、電解液に接触している。電池要素２には、正極導電タブ２１１と負極導電タブ２２１とが接続されている。正極導電タブ２１１及び負極導電タブ２２１は、携帯用電子機器（図示せず）に電気的に接続されるように、封入袋１の封止辺１２から延伸している。 The battery element 2 is accommodated in the accommodating space 16 of the enclosing bag 1 and is in contact with the electrolytic solution. A positive electrode conductive tab 211 and a negative electrode conductive tab 221 are connected to the battery element 2. The positive electrode conductive tab 211 and the negative electrode conductive tab 221 extend from the sealing side 12 of the encapsulating bag 1 so as to be electrically connected to a portable electronic device (not shown).
一方向排気弁３は、封入袋１に配置され、収容空間１６と外部とを連通している。収容空間１６と外部とを連通することのできる場所であれば、一方向排気弁３が封入袋１のどこに配置されていてもよい。そのため、少なくとも１つの一方向排気弁３を封入袋１の少なくとも１辺に配置することも、本発明のいくつかの実施例のうち１つである。具体的に、３つの封止辺１１，１２，１３及び折り辺１４のそれぞれには、少なくとも１つの一方向排気弁３が配置されてもよい。本実施形態において、各辺にそれぞれ１つの一方向排気弁３が配置されていることを例として説明するが、本発明は、複数の辺に１つの一方向排気弁３が配置されてもよく（図示せず）、一辺のみ１つの一方向排気弁３が配置されてもよい（図１に示す）が、これらに限定されない。 The one-way exhaust valve 3 is disposed in the enclosing bag 1 and communicates the housing space 16 with the outside. The one-way exhaust valve 3 may be disposed anywhere in the enclosing bag 1 as long as the accommodation space 16 can communicate with the outside. Therefore, it is one of several embodiments of the present invention that at least one one-way exhaust valve 3 is arranged on at least one side of the enclosing bag 1. Specifically, at least one one-way exhaust valve 3 may be disposed on each of the three sealing sides 11, 12, 13 and the folding side 14. In the present embodiment, an example in which one unidirectional exhaust valve 3 is arranged on each side will be described. However, in the present invention, one unidirectional exhaust valve 3 may be arranged on a plurality of sides. (Not shown), one one-way exhaust valve 3 may be disposed only on one side (shown in FIG. 1), but is not limited thereto.
図１に示すように、一方向排気弁３は、封入袋１の折り辺１４に配置されているため、折り辺１４に一方向排気弁３の外周縁を包囲している孔１４１が形成され、一方向排気弁３が収容空間１６と外部とを連通することによって排気することができる。なお、一方向排気弁３は逆止弁であってもよく、一方向に排気可能なものであればよいが、これに限定されない。 As shown in FIG. 1, since the one-way exhaust valve 3 is disposed on the folding side 14 of the enclosing bag 1, a hole 141 surrounding the outer peripheral edge of the one-way exhaust valve 3 is formed on the folding side 14. The one-way exhaust valve 3 can be exhausted by communicating the accommodation space 16 with the outside. The one-way exhaust valve 3 may be a check valve and may be any one that can exhaust in one direction, but is not limited thereto.
図３を参照する。電池要素２は、積層された少なくとも１つの正極板２１、少なくとも１つの負極板２２、及びいずれかの隣接する正極板２１と負極板２２との間に挟持される少なくとも１つのセパレータ２３を含んでいる。ここで、正極板２１には、正極導電タブ２１１が電気的に接続され、負極板２２には、負極導電タブ２２１が電気的に接続され、セパレータ２３は、正極板２１と負極板２２との接触を防止するために用いられる。 Please refer to FIG. The battery element 2 includes at least one positive electrode plate 21, at least one negative electrode plate 22, and at least one separator 23 sandwiched between any adjacent positive electrode plate 21 and negative electrode plate 22. Yes. Here, the positive electrode conductive tab 211 is electrically connected to the positive electrode plate 21, the negative electrode conductive tab 221 is electrically connected to the negative electrode plate 22, and the separator 23 is connected between the positive electrode plate 21 and the negative electrode plate 22. Used to prevent contact.
これにより、リチウム電池を通電する際、電池要素２と電解液との化学反応によりガスが発生しても、封入袋１内がガスの充気により一方向排気弁３の所定圧力まで加圧されると、収容空間１６内のガスを一方向排気弁３から外部へ排出することができる。このように、封入袋１が適切に膨張し、リチウム電池の変形や膨張の問題を確実に回避することができる。また、その後リチウム電池はガスが再び発生した場合にも、収容空間１６内に所定圧力を超えたガスが一方向排気弁３から外部へ排出されることができる。言い換えれば、一方向排気弁３は、何回でもリチウム電池の排気に用いられることが可能である。 Thereby, when energizing a lithium battery, even if gas is generated by a chemical reaction between the battery element 2 and the electrolytic solution, the inside of the sealing bag 1 is pressurized to a predetermined pressure of the one-way exhaust valve 3 by gas charging. Then, the gas in the accommodation space 16 can be discharged from the one-way exhaust valve 3 to the outside. Thus, the encapsulating bag 1 is inflated appropriately, and the problem of deformation and expansion of the lithium battery can be reliably avoided. Further, after that, when gas is generated again in the lithium battery, the gas exceeding the predetermined pressure in the accommodating space 16 can be discharged from the one-way exhaust valve 3 to the outside. In other words, the one-way exhaust valve 3 can be used for exhausting lithium batteries any number of times.
図２、図３及び図４は、本発明の第２の実施形態の概略構成を示す断面図及び部分拡大図である。第２の実施形態の構成は、第１の実施形態の構成とほとんど同じであるが、その相違点は、第２の実施形態に係るリチウム電池の排気構造は吸水通気部材４をさらに含んでいる。 2, 3 and 4 are a cross-sectional view and a partially enlarged view showing a schematic configuration of the second embodiment of the present invention. The configuration of the second embodiment is almost the same as the configuration of the first embodiment, but the difference is that the exhaust structure of the lithium battery according to the second embodiment further includes a water-absorbing ventilation member 4. .
図２、図３及び図４に示すように、封入袋１の３つの封止辺１１，１２，１３と折り辺１４との間には、吸水空間１７がさらに形成されている。収容空間１６及び吸水空間１７は互いに連通されることで、一方向排気弁３が吸水空間１７を介して収容空間１６に連通されるようになる。 As shown in FIGS. 2, 3, and 4, a water absorption space 17 is further formed between the three sealing sides 11, 12, 13 and the folding side 14 of the enclosing bag 1. The accommodation space 16 and the water absorption space 17 communicate with each other, so that the one-way exhaust valve 3 communicates with the accommodation space 16 through the water absorption space 17.
吸水通気部材４は、吸水空間１７内に収容され、吸水空間１７を通過するガスに付着している電解液を吸着するために用いられる。もちろん、ガスを介さずに収容空間１６から吸水空間１７に直接浸透してきた電解液も吸水通気部材４によって吸収されることが可能である。吸水通気部材４は、コットンや毛細管組織などの吸水及び通気機能を備えるものであればよいが、これらに限定されない。図２、図３及び図４には、吸水空間１７内に配置された毛細管組織が示されている。 The water-absorbing ventilation member 4 is accommodated in the water-absorbing space 17 and is used for adsorbing the electrolytic solution adhering to the gas passing through the water-absorbing space 17. Of course, the electrolyte solution that has permeated directly from the accommodation space 16 into the water absorption space 17 without passing through the gas can also be absorbed by the water absorption ventilation member 4. The water-absorbing ventilation member 4 is not limited to these as long as it has water absorption and ventilation functions such as cotton and capillary tissue. 2, 3, and 4 illustrate a capillary tissue disposed in the water absorption space 17.
これにより、リチウム電池の収容空間１６内にガスが発生した場合、封入袋１内がガスの充気（図３に示す）により一方向排気弁３の所定圧力まで加圧されると、一方向排気弁３は、吸水空間１７を介して、収容空間１６内のガスを外部へ排出するようにしている。このように、本発明の第２の実施形態に係るリチウム電池の排気構造は、収容空間１６内のガスを排出する（第１の実施形態の機能を有する）ほか、ガスに付着している電解液が吸水通気部材４によって吸着されることができる。つまり、一方向排気弁３から排出されたガスは、乾燥で電解液が付着していないガスであり、電解液は、浸透又はガスに伴って排出されることがない。 Thereby, when gas is generated in the storage space 16 of the lithium battery, if the inside of the enclosing bag 1 is pressurized to the predetermined pressure of the one-way exhaust valve 3 by gas charging (shown in FIG. 3), The exhaust valve 3 discharges the gas in the accommodation space 16 to the outside through the water absorption space 17. Thus, the exhaust structure of the lithium battery according to the second embodiment of the present invention exhausts the gas in the accommodation space 16 (having the function of the first embodiment), and electrolysis attached to the gas. The liquid can be adsorbed by the water-absorbing ventilation member 4. That is, the gas discharged from the one-way exhaust valve 3 is a gas that is dry and has no electrolyte solution attached thereto, and the electrolyte solution is not discharged due to permeation or gas.
また、収容空間１６と吸水空間１７との間を仕切る方法について、図２及び図３に示すように、封入袋１は、収容空間１６と吸水空間１７とを仕切る仕切り体１５を有し、仕切り体１５には、少なくとも１つの通気孔１５０が開設されることで、収容空間１６と吸水空間１７とが連通されるようになる。本実施形態において、封入袋１には、加熱押圧や粘着により第１仕切り体１５１及び第２仕切り体１５２が形成されてもよい。第１仕切り体１５１及び第２仕切り体１５２は、通気孔１５０を形成するように、隣接する端部が互いに間隔を置いて配置されている。第１仕切り体１５１、第２仕切り体１５２及び通気孔１５０によって仕切り体１５が構成されている。 Moreover, about the method of partitioning between the storage space 16 and the water absorption space 17, as shown in FIG.2 and FIG.3, the enclosure bag 1 has the partition body 15 which partitions off the storage space 16 and the water absorption space 17, and is divided. By opening at least one vent hole 150 in the body 15, the accommodation space 16 and the water absorption space 17 are brought into communication. In this embodiment, the 1st partition 151 and the 2nd partition 152 may be formed in the enclosure bag 1 by heating press or adhesion. The first partition 151 and the second partition 152 are arranged such that adjacent ends are spaced from each other so as to form the vent hole 150. The partition 15 is constituted by the first partition 151, the second partition 152, and the vent hole 150.
図４に示すように、第１の実施形態及び第２の実施形態における一方向排気弁３は、主として、中空シェル３１、ピストン３２、止め輪３３及び弾性部材３４を含んでいる。中空シェル３１は、互いに連通している吸気口３１１及び排気口３１２を有している。中空シェル３１内には、吸気口３１１に対応する位置に通路３１４が開設され、吸気口３１１から離れた位置に止め輪３３が配置されている。ピストン３２は、中空シェル３１内の通路３１４と止め輪３３との間に摺動可能に配置されている。また、ピストン３２のピストンヘッド３２１には、通路３１４と排気口３１２との間を連通するＴ字状通路３２２が開設されている。弾性部材３４は、ピストン３２と止め輪３３との間に弾性支持されている。 As shown in FIG. 4, the one-way exhaust valve 3 in the first embodiment and the second embodiment mainly includes a hollow shell 31, a piston 32, a retaining ring 33, and an elastic member 34. The hollow shell 31 has an intake port 311 and an exhaust port 312 that communicate with each other. In the hollow shell 31, a passage 314 is opened at a position corresponding to the intake port 311, and a retaining ring 33 is disposed at a position away from the intake port 311. The piston 32 is slidably disposed between the passage 314 in the hollow shell 31 and the retaining ring 33. The piston head 321 of the piston 32 is provided with a T-shaped passage 322 that communicates between the passage 314 and the exhaust port 312. The elastic member 34 is elastically supported between the piston 32 and the retaining ring 33.
封入袋１内の圧力が一方向排気弁３の所定圧力（弾性部材３４の弾性支持力）より小さい場合、弾性部材３４の弾性支持力により、ピストン３２のピストンヘッド３２１が通路３１４を閉塞させる（図示せず）。つまり、収容空間１６内のガスは、ピストン３２を押し動かすことができないため、排出されることができない。 When the pressure in the enclosing bag 1 is smaller than a predetermined pressure of the one-way exhaust valve 3 (elastic support force of the elastic member 34), the piston head 321 of the piston 32 closes the passage 314 by the elastic support force of the elastic member 34 ( Not shown). That is, since the gas in the accommodation space 16 cannot push and move the piston 32, it cannot be discharged.
一方、封入袋１内の圧力が一方向排気弁３の所定圧力より大きい場合、収容空間１６内のガスはピストン３２を押し動かすようになり、ピストン３２のピストンヘッド３２１を通路３１４から退避させる（図４に示す）。この時、収容空間１６内のガスは、通路３１４及びＴ字状通路３２２を通過し、一方向排気弁３の排気口３１２から排出される。 On the other hand, when the pressure in the enclosing bag 1 is larger than the predetermined pressure of the one-way exhaust valve 3, the gas in the accommodation space 16 pushes and moves the piston 32, and the piston head 321 of the piston 32 is retracted from the passage 314 ( (Shown in FIG. 4). At this time, the gas in the accommodation space 16 passes through the passage 314 and the T-shaped passage 322 and is discharged from the exhaust port 312 of the one-way exhaust valve 3.
図５は、本発明の第３の実施形態の概略構成を示す断面図である。第３の実施形態の構成は、第２の実施形態の構成とほとんど同じであるが、その相違点は、第３の実施形態において一方向排気弁３が３つの封止辺１１，１２，１３のうち一辺のみに配置されている。本実施形態において、３つの封止辺のうち封止辺１３に一方向排気弁３が配置されていることを例として説明する。このように、封止辺１３に一方向排気弁３の外周縁を包囲している孔１３１が形成されるとともに、仕切り体１５が封止辺１３に近い位置に配置されることで、仕切り体１５と封止辺１３との間に吸水空間１７が形成されるようになる。そのため、第２の実施形態と同様に、排気及び電解液を吸着する機能を有している。 FIG. 5 is a cross-sectional view showing a schematic configuration of the third embodiment of the present invention. The configuration of the third embodiment is almost the same as the configuration of the second embodiment except that the one-way exhaust valve 3 has three sealing sides 11, 12, 13 in the third embodiment. It is arranged only on one side. In the present embodiment, an example in which the one-way exhaust valve 3 is disposed on the sealing side 13 among the three sealing sides will be described. As described above, the hole 131 surrounding the outer peripheral edge of the one-way exhaust valve 3 is formed in the sealing side 13 and the partition body 15 is disposed at a position close to the sealing side 13. A water absorption space 17 is formed between 15 and the sealing side 13. Therefore, similarly to the second embodiment, it has a function of adsorbing exhaust gas and electrolyte.
図６は、本発明の第４の実施形態の概略構成を示す断面図である。第４の実施形態の構成は、第２の実施形態の構成とほとんど同じであるが、その相違点は、第４の実施形態において吸水通気部材４が一方向排気弁３ａ内に配置されている。 FIG. 6 is a cross-sectional view showing a schematic configuration of the fourth embodiment of the present invention. The configuration of the fourth embodiment is almost the same as the configuration of the second embodiment, but the difference is that in the fourth embodiment, the water-absorbing ventilation member 4 is disposed in the one-way exhaust valve 3a. .
図６に示すように、一方向排気弁３ａにおいて、中空シェル３１内には、吸気口３１１に対応する位置に吸気口３１１と通路３１４との間を連通する吸水空間３１３が配置され、吸水通気部材４は、その吸水空間３１３内に収容されている。 As shown in FIG. 6, in the one-way exhaust valve 3a, a water absorption space 313 communicating between the intake port 311 and the passage 314 is disposed in the hollow shell 31 at a position corresponding to the intake port 311. The member 4 is accommodated in the water absorption space 313.
これにより、封入袋１は収容空間１６からガスを排出する場合、まず、吸水通気部材４によって一方向排気弁３ａの吸水空間３１３を通過するガスに付着している電解液を吸着し、次に、乾燥で電解液が付着していないガスを一方向排気弁３ａの排気口３１２から排出する。そのため、第２の実施形態と同様に、排気及び電解液を吸着する機能を有している。 Thereby, when discharging the gas from the accommodation space 16, the enclosing bag 1 first adsorbs the electrolyte attached to the gas passing through the water absorption space 313 of the one-way exhaust valve 3 a by the water absorption ventilation member 4, and then Then, the gas to which the electrolyte solution does not adhere due to drying is discharged from the exhaust port 312 of the one-way exhaust valve 3a. Therefore, similarly to the second embodiment, it has a function of adsorbing exhaust gas and electrolyte.
上述したように、本発明は、従来技術に比べてリチウム電池内の封入袋１が一定程度のガスを生成すると、一方向排気弁３，３ａによって過剰なガスを直ちに排出することができ、リチウム電池の変形や膨張の問題を回避することが可能である。 As described above, the present invention allows the excess gas to be immediately discharged by the one-way exhaust valves 3 and 3a when the encapsulating bag 1 in the lithium battery generates a certain amount of gas as compared with the prior art. It is possible to avoid the problem of deformation and expansion of the battery.
また、本発明は、収容空間１６と一方向排気弁３，３ａとの間に吸水通気部材４をさらに設けることにより、その吸水通気部材４によってガスに付着している電解液を吸着し、電解液は、浸透又はガスに伴って排出されることがない。 Further, the present invention further provides a water-absorbing ventilation member 4 between the accommodation space 16 and the one-way exhaust valves 3 and 3a, thereby adsorbing the electrolytic solution attached to the gas by the water-absorbing ventilation member 4 and The liquid does not drain with osmosis or gas.
以上、本発明の好ましい実施形態について説明したが、本発明は、上記実施形態に限定されるものではない。本発明にあっては種々の変形が可能であって、かかる変形は、特許請求の範囲内に包含される変形である限り本発明の技術的範囲に包含されることに留意すべきである。 As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to the said embodiment. It should be noted that various modifications are possible in the present invention, and such modifications are included in the technical scope of the present invention as long as they are included in the scope of the claims.
１…封入袋
１１、１２、１３…封止辺
１３１…孔
１４…折り辺
１４１…孔
１５…仕切り体
１５０…通気孔
１５１…第１仕切り体
１５２…第２仕切り体
１６…収容空間
１７…吸水空間
２…電池要素
２１…正極板
２１１…正極導電タブ
２２…負極板
２２１…負極導電タブ
２３…セパレータ
３、３ａ…一方向排気弁
３１…中空シェル
３１１…吸気口
３１２…排気口
３１３…吸水空間
３１４…通路
３２…ピストン
３２１…ピストンヘッド
３２２…Ｔ字状通路
３３…止め輪
３４…弾性部材
４…吸水通気部材
DESCRIPTION OF SYMBOLS 1 ... Encapsulation bag 11, 12, 13 ... Sealing side 131 ... Hole 14 ... Folding side 141 ... Hole 15 ... Partition body 150 ... Vent hole 151 ... 1st partition body 152 ... 2nd partition body 16 ... Storage space 17 ... Water absorption Space 2 ... Battery element 21 ... Positive electrode plate 211 ... Positive electrode conductive tab 22 ... Negative electrode plate 221 ... Negative electrode conductive tab 23 ... Separator 3, 3a ... One-way exhaust valve 31 ... Hollow shell 311 ... Intake port 312 ... Exhaust port 313 ... Water absorption space 314 ... passage 32 ... piston 321 ... piston head 322 ... T-shaped passage 33 ... retaining ring 34 ... elastic member 4 ... water-absorbing ventilation member
Claims (18)
前記収容空間に収容される電池要素と、
前記収容空間に収容されるとともに、前記電池要素と接触することでガスを生成する電解液と、
前記封入袋に配置され、前記収容空間に連通して前記収容空間内からガスを排出する少なくとも１つの一方向排気弁と、
を含み、
前記一方向排気弁は、吸水通気部材を有し、前記収容空間内からガスを排出する際に、前記吸水通気部材が前記ガスに付着している前記電解液を吸着することを特徴とするリチウム電池の排気構造。 An encapsulating bag having a plurality of sides and a housing space formed between the plurality of sides;
A battery element housed in the housing space;
An electrolytic solution that is housed in the housing space and generates a gas by contact with the battery element;
At least one one-way exhaust valve that is disposed in the enclosing bag and communicates with the accommodation space and discharges gas from the accommodation space;
Only including,
The one-way exhaust valve has a water absorption ventilation member, and the water absorption ventilation member adsorbs the electrolytic solution adhering to the gas when the gas is discharged from the accommodation space. Battery exhaust structure.
前記一方向排気弁は、前記折り辺に配置されていることを特徴とする請求項３に記載のリチウム電池の排気構造。 The plurality of sides of the encapsulating bag includes a plurality of sealing sides and folding sides,
The exhaust structure for a lithium battery according to claim 3, wherein the one-way exhaust valve is disposed on the folding side.
前記一方向排気弁は、前記複数の封止辺のうち１つの封止辺に配置されていることを特徴とする請求項３に記載のリチウム電池の排気構造。 The plurality of sides of the encapsulating bag includes a plurality of sealing sides and folding sides,
4. The exhaust structure for a lithium battery according to claim 3, wherein the one-way exhaust valve is disposed on one sealing side of the plurality of sealing sides.
前記中空シェルには、前記吸気口に対応する位置に前記吸気口と前記排気口とを連通し、前記吸水通気部材を収容する吸水空間が配置されていることを特徴とする請求項１に記載のリチウム電池の排気構造。 The one-way exhaust valve includes a hollow shell having an intake port and an exhaust port communicating with each other, and a piston slidable in the hollow shell,
Wherein the hollow shell according to claim 1, characterized in that communicating with said inlet and said outlet at a position corresponding to said air inlet, water space for accommodating the water permeable member is disposed Lithium battery exhaust structure.
前記中空シェル内には、前記吸気口から離れた位置に止め輪が配置され、
前記弾性部材は、前記ピストンと前記止め輪との間に弾性支持されていることを特徴とする請求項７に記載のリチウム電池の排気構造。 The one-way exhaust valve further includes an elastic member,
In the hollow shell, a retaining ring is disposed at a position away from the intake port,
8. The exhaust structure for a lithium battery according to claim 7 , wherein the elastic member is elastically supported between the piston and the retaining ring.
前記吸水空間は、前記吸気口と前記通路との間を連通して配置され、
前記ピストンのピストンヘッドは、前記通路を閉塞する位置と前記通路を開放する位置との間に摺動自在に設けられていることを特徴とする請求項９に記載のリチウム電池の排気構造。 A passage is opened in the hollow shell,
The water absorption space is disposed in communication between the air inlet and the passage,
The exhaust structure for a lithium battery according to claim 9 , wherein the piston head of the piston is slidably provided between a position where the passage is closed and a position where the passage is opened.
前記収容空間に収容される電池要素と、
前記収容空間に収容されるとともに、前記電池要素と接触することでガスを生成する電解液と、
前記吸水空間に収容される吸水通気部材と、
前記封入袋に配置され、前記吸水空間を介して前記収容空間を連通する少なくとも１つの一方向排気弁と、を含み、
前記一方向排気弁は、前記吸水空間を介して前記収容空間内からガスを排出し、前記ガスに付着している前記電解液が前記吸水空間を通過する際に前記吸水通気部材によって吸着されることを特徴とするリチウム電池の排気構造。 A plurality of sides, an encapsulating bag having a storage space and a water absorption space formed between the plurality of sides and communicating with each other;
A battery element housed in the housing space;
An electrolytic solution that is housed in the housing space and generates a gas by contact with the battery element;
A water-absorbing ventilation member accommodated in the water-absorbing space;
Including at least one one-way exhaust valve disposed in the enclosing bag and communicating with the accommodation space via the water absorption space;
The one-way exhaust valve discharges gas from the accommodation space through the water absorption space, and the electrolytic solution adhering to the gas is adsorbed by the water absorption ventilation member when passing through the water absorption space. An exhaust structure for a lithium battery.
前記仕切り体には、前記収容空間と前記吸水空間とを連通する少なくとも１つの通気孔が開設されていることを特徴とする請求項１２に記載のリチウム電池の排気構造。 The enclosing bag has a partition that partitions the accommodation space and the water absorption space;
Wherein the partition member, the exhaust of a lithium battery according to claim 1 2, characterized in that at least one vent communicating between the said accommodating space water space is opened.
前記一方向排気弁は、前記折り辺に配置されていることを特徴とする請求項１６に記載のリチウム電池の排気構造。 The plurality of sides of the encapsulating bag includes a plurality of sealing sides and folding sides,
The exhaust structure for a lithium battery according to claim 16 , wherein the one-way exhaust valve is disposed on the folding side.
前記一方向排気弁は、前記複数の封止辺のうち１つの封止辺に配置されていることを特徴とする請求項１６に記載のリチウム電池の排気構造。 The plurality of sides of the encapsulating bag includes a plurality of sealing sides and folding sides,
The one-way exhaust valve, the exhaust of a lithium battery according to claim 1 6, characterized in that it is arranged in one of the sealing sides of the plurality of Futomehen.
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| WO2015074006A1 (en) | 2013-11-15 | 2015-05-21 | The Regents Of The University Of California | Electrochemical devices comprising compressed gas solvent electrolytes |
| CN109478473B (en) | 2016-05-27 | 2021-09-28 | 加利福尼亚大学董事会 | Electrochemical energy storage device |
| KR102555751B1 (en) * | 2017-10-17 | 2023-07-14 | 주식회사 엘지에너지솔루션 | Gas Dischargeable Pouch-Type Case for Secondary Battery |
| WO2019222345A1 (en) * | 2018-05-18 | 2019-11-21 | South 8 Technologies, Inc. | Electrochemical cell cap |
| JP7146219B2 (en) | 2018-05-18 | 2022-10-04 | サウス エイト テクノロジーズ インク． | Chemical formulations for rechargeable electrochemical devices |
| JP7040293B2 (en) | 2018-05-28 | 2022-03-23 | 大日本印刷株式会社 | battery |
| JP6996422B2 (en) * | 2018-05-28 | 2022-02-21 | 大日本印刷株式会社 | battery |
| JP6996421B2 (en) | 2018-05-28 | 2022-02-21 | 大日本印刷株式会社 | Batteries, heat seal devices, and battery manufacturing methods |
| JP7040294B2 (en) * | 2018-05-28 | 2022-03-23 | 大日本印刷株式会社 | battery |
| KR102410663B1 (en) * | 2018-07-06 | 2022-06-17 | 주식회사 엘지에너지솔루션 | Secondary cell and manufacturing method thereof |
| JP7205136B2 (en) * | 2018-09-25 | 2023-01-17 | 大日本印刷株式会社 | Electrical storage device valve device and electrical storage device |
| JP6540871B1 (en) * | 2018-10-18 | 2019-07-10 | 大日本印刷株式会社 | STORAGE DEVICE VALVE DEVICE AND STORAGE DEVICE |
| JP6530847B1 (en) * | 2018-10-22 | 2019-06-12 | 大日本印刷株式会社 | battery |
| JP6530850B1 (en) * | 2018-10-22 | 2019-06-12 | 大日本印刷株式会社 | battery |
| KR102446570B1 (en) * | 2019-05-03 | 2022-09-23 | 주식회사 엘지에너지솔루션 | Danger sensing battery cell |
| WO2020246072A1 (en) * | 2019-06-04 | 2020-12-10 | 大日本印刷株式会社 | Electricity storage device, electricity storage device assembly, electric vehicle, and method for manufacturing electricity storage device |
| JP2020053387A (en) * | 2019-06-12 | 2020-04-02 | 大日本印刷株式会社 | Valve device for power storage device, and power storage device |
| US10873070B2 (en) | 2019-10-07 | 2020-12-22 | South 8 Technologies, Inc. | Method and apparatus for liquefied gas solvent delivery for electrochemical devices |
| CN112744402A (en) * | 2020-12-29 | 2021-05-04 | 江苏中兴派能电池有限公司 | Lithium ion battery packaging pole piece heat-sealing bag and preparation method thereof |
| CN114421038B (en) * | 2022-03-30 | 2022-06-17 | 宁德新能源科技有限公司 | Battery cell sealing assembly, battery, electric equipment and battery cell sealing method |
| US11958679B1 (en) | 2022-10-24 | 2024-04-16 | South 8 Technologies, Inc. | Mechanisms and methods for pressurized fluid injection and sealing |
Family Cites Families (10)
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| JP2005123267A (en) * | 2003-10-14 | 2005-05-12 | Wako Denshi Kk | Valve element |
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| JP4968423B2 (en) * | 2005-05-30 | 2012-07-04 | 大日本印刷株式会社 | Lithium battery exterior |
| EP2057709B1 (en) * | 2006-08-28 | 2012-03-07 | LG Chem, Ltd. | Secondary battery including one-way exhaust valve |
| JP5261908B2 (en) * | 2006-09-20 | 2013-08-14 | 大日本印刷株式会社 | Flat electrochemical cell |
| KR101577883B1 (en) * | 2012-03-28 | 2015-12-15 | 가부시끼가이샤 옵토니쿠스 세이미쯔 | Safety vent and electrochemical device |
| WO2014128909A1 (en) * | 2013-02-22 | 2014-08-28 | 株式会社 日立製作所 | Secondary battery and secondary battery module |
| JP6179169B2 (en) * | 2013-04-18 | 2017-08-16 | 日新電機株式会社 | Power storage device |
| JP2015156322A (en) * | 2014-02-20 | 2015-08-27 | 日産自動車株式会社 | Electric device |
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