JP6028742B2 - Battery module - Google Patents
Battery module Download PDFInfo
- Publication number
- JP6028742B2 JP6028742B2 JP2014009827A JP2014009827A JP6028742B2 JP 6028742 B2 JP6028742 B2 JP 6028742B2 JP 2014009827 A JP2014009827 A JP 2014009827A JP 2014009827 A JP2014009827 A JP 2014009827A JP 6028742 B2 JP6028742 B2 JP 6028742B2
- Authority
- JP
- Japan
- Prior art keywords
- battery
- duct
- wall portions
- main body
- release valve
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
- H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
-
- 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
-
- 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
- H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
- H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
-
- 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
Description
本発明は、電池セルから排出された気体の流通路がダクト内に区画された電池モジュールに関する。 The present invention relates to a battery module in which a flow path of gas discharged from a battery cell is partitioned in a duct.
電池セルには、電池セルの内圧が高まったときに圧力を開放する圧力開放弁が設けられており、この種の電池セルを並設した電池モジュールでは、気体の拡散を抑止している（例えば、特許文献１参照）。 The battery cell is provided with a pressure release valve that releases the pressure when the internal pressure of the battery cell increases, and the battery module in which this type of battery cell is arranged side by side suppresses gas diffusion (for example, , See Patent Document 1).
特許文献１では、ガス排出口を有する単電池を積層しており、単電池には、ガス排出口に対応して貫通孔が連設されたガス排出管が設けられている。単電池の内圧が上昇し、ガス排出口から気体が排出されると、この気体はガス排出管に流入し、気体が拡散することが抑止されている。 In Patent Document 1, single cells having gas discharge ports are stacked, and each single cell is provided with a gas discharge pipe in which through holes are continuously provided corresponding to the gas discharge ports. When the internal pressure of the unit cell rises and the gas is discharged from the gas discharge port, this gas flows into the gas discharge pipe and the gas is prevented from diffusing.
ところで、単電池から気体が排出されると、ガス排出管の内圧が高まり、ガス排出管が変形するおそれがある。ガス排出管が変形すると、ガス排出管の気密性が確保できなくなるおそれがあるため、ガス排出管の変形を抑制することが望まれている。 By the way, when gas is discharged from the unit cell, the internal pressure of the gas discharge pipe increases, and the gas discharge pipe may be deformed. If the gas discharge pipe is deformed, there is a possibility that the gas tightness of the gas discharge pipe cannot be secured. Therefore, it is desired to suppress the deformation of the gas discharge pipe.
本発明の目的は、電池セルから排出された気体が流入するダクトの変形を抑制することができる電池モジュールを提供することにある。 The objective of this invention is providing the battery module which can suppress the deformation | transformation of the duct into which the gas discharged | emitted from the battery cell flows.
上記課題を解決する電池モジュールは、圧力開放弁を有するケースに電極組立体を収容した電池セルを複数備える電池ユニットと、内部に気体の流通路が区画されるダクトと、を備え、前記圧力開放弁が前記流通路に露出した電池モジュールであって、前記電池ユニットは、前記複数の電池セルをそれぞれ保持する複数の電池ホルダを備え、前記電池ホルダは、前記複数の電池セルを連結すべくボルトが挿通されるボルト挿通部を有し、前記ダクトは、前記圧力開放弁と対向する本体と、該本体から前記ケースにおける前記圧力開放弁が設けられた面に向けて延びる一対の壁部とを有し、前記ボルト挿通部は、前記一対の壁部の離間する方向の外面に沿うように配置されていることを要旨とする。 A battery module that solves the above-described problem includes a battery unit that includes a plurality of battery cells each housing an electrode assembly in a case having a pressure release valve, and a duct in which a gas flow passage is defined. A battery module in which a valve is exposed in the flow path, wherein the battery unit includes a plurality of battery holders for holding the plurality of battery cells, and the battery holder is a bolt for connecting the plurality of battery cells. The duct has a main body facing the pressure release valve, and a pair of wall portions extending from the main body toward a surface of the case where the pressure release valve is provided. a, the bolt insertion portion is disposed along the spaced directions of the outer surface of the pair of wall portions and gist Tei Rukoto.
これによれば、圧力開放弁が開放されることでダクトの内圧が高まり、ダクトが外側に向けて変形しようとすると、ダクトが電池ホルダと当接する。これにより、ダクトの変形を抑制することができる。
上記課題を解決する電池モジュールは、圧力開放弁を有するケースに電極組立体を収容した電池セルを複数備える電池ユニットと、内部に気体の流通路が区画されるダクトと、を備え、前記圧力開放弁が前記流通路に露出した電池モジュールであって、前記電池ユニットは、前記複数の電池セルをそれぞれ保持する複数の電池ホルダを備え、前記ダクトは、前記圧力開放弁と対向する本体と、該本体から前記ケースにおける前記圧力開放弁が設けられた面に向けて延びる一対の壁部とを有し、該一対の壁部は、先端が前記電池セルの面に接触しており、
前記一対の壁部の内面、前記電池セルの面、及び、前記本体によって前記流通路が区画されており、前記ダクトにおける前記流通路を区画する前記一対の壁部の内面とは反対の面の少なくとも一部が前記電池ユニットを構成する前記電池ホルダに沿うように配置されていることを要旨とする。
上記電池モジュールについて、前記電池ホルダは、前記一対の壁部の離間する方向の外面に沿うように配置されていることが好ましい。
According to this, when the pressure release valve is opened, the internal pressure of the duct increases, and when the duct tries to deform outward, the duct comes into contact with the battery holder. Thereby, deformation of the duct can be suppressed.
A battery module that solves the above-described problem includes a battery unit that includes a plurality of battery cells each housing an electrode assembly in a case having a pressure release valve, and a duct in which a gas flow passage is defined. A battery module in which a valve is exposed in the flow passage, wherein the battery unit includes a plurality of battery holders for holding the plurality of battery cells, and the duct includes a main body facing the pressure release valve; A pair of wall portions extending from the main body toward the surface of the case where the pressure relief valve is provided, and the pair of wall portions have their tips in contact with the surface of the battery cell;
The flow paths are defined by the inner surfaces of the pair of wall portions, the surfaces of the battery cells, and the main body, and are opposite to the inner surfaces of the pair of wall portions that define the flow paths in the duct. The gist is that at least part of the battery unit is arranged along the battery holder constituting the battery unit.
For the battery module, the battery holder, it is not preferable that is disposed along the spaced directions of the outer surface of the pair of wall portions.
上記電池モジュールについて、前記ダクトは、前記複数の電池セルを接続するバスバーを覆うバスバーカバーと一体であることが好ましい。
これによれば、部品点数が増加することを抑制することができる。
About the said battery module, it is preferable that the said duct is integral with the bus-bar cover which covers the bus-bar which connects these battery cells.
According to this, it is possible to suppress an increase in the number of parts.
本発明によれば、電池セルから排出された気体が流入するダクトの変形を抑制することができる。 According to the present invention, deformation of a duct into which gas discharged from a battery cell flows can be suppressed.
以下、電池モジュールの一実施形態について説明する。
図１に示すように、電池モジュール１０は、電池ユニット２１に樹脂製のバスバーカバー４１を取り付けることで構成されている。
Hereinafter, an embodiment of the battery module will be described.
As shown in FIG. 1, the battery module 10 is configured by attaching a resin bus bar cover 41 to a battery unit 21.
電池ユニット２１は、電池セル２２を有し、電池セル２２は、樹脂製の電池ホルダ３０に保持された状態で複数並設されている。電池セル２２は、バスバー１３によって接続されている。本実施形態では、電池セル２２として角型電池を用いている。電池セル２２の並設方向両端には、エンドプレート１１が設けられている。各エンドプレート１１及び各電池ホルダ３０には、ボルトＢが挿通されている。ボルトＢは、一方のエンドプレート１１から他方のエンドプレート１１に向けて挿通され、他方のエンドプレート１１側でナットＮに螺合されている。 The battery unit 21 includes battery cells 22, and a plurality of the battery cells 22 are arranged in parallel while being held by a resin battery holder 30. The battery cells 22 are connected by the bus bar 13. In the present embodiment, a square battery is used as the battery cell 22. End plates 11 are provided at both ends of the battery cells 22 in the parallel direction. Bolts B are inserted through the end plates 11 and the battery holders 30. The bolt B is inserted from one end plate 11 toward the other end plate 11 and is screwed into the nut N on the other end plate 11 side.
図２に示すように、上記した電池ホルダ３０に保持された電池セル２２は、ケース２３に電極組立体２４が収容されている。電極組立体２４は正極と負極を備えている。ケース２３は、電極組立体２４を収容する有底箱状の本体部２５と、本体部２５の開口部を閉塞する板状の蓋部２６とから構成されている。蓋部２６には、接続端子２７（正極端子及び負極端子）が設けられている。接続端子２７は、導電部材２９を介して電極組立体２４に電気的に接続されている。蓋部２６には、ケース２３の内圧が閾値まで上昇したときに、破断して開放される圧力開放弁２８が設けられている。「閾値」は、ケース２３の内圧が高まったときに、ケース２３の内圧によってケース２３が破損する前に圧力開放弁２８が破断するような圧力に設定される。また、蓋部２６には、ケース２３内に電解液を注入するための注液部１５が設けられている。注液部１５は、蓋部２６に形成された注液口１６に、封止栓１７が挿入される挿入部材１８が挿入されることで構成されている。注液部１５は、蓋部２６から突出している。 As shown in FIG. 2, the battery cell 22 held by the battery holder 30 described above has a case 23 in which an electrode assembly 24 is accommodated. The electrode assembly 24 includes a positive electrode and a negative electrode. The case 23 includes a bottomed box-shaped main body portion 25 that accommodates the electrode assembly 24 and a plate-shaped lid portion 26 that closes the opening of the main body portion 25. The lid 26 is provided with connection terminals 27 (a positive terminal and a negative terminal). The connection terminal 27 is electrically connected to the electrode assembly 24 through the conductive member 29. The lid portion 26 is provided with a pressure release valve 28 that is broken and opened when the internal pressure of the case 23 rises to a threshold value. The “threshold value” is set such that when the internal pressure of the case 23 increases, the pressure release valve 28 is broken before the case 23 is damaged by the internal pressure of the case 23. In addition, the lid portion 26 is provided with a liquid injection portion 15 for injecting an electrolytic solution into the case 23. The liquid injection part 15 is configured by inserting an insertion member 18 into which the sealing plug 17 is inserted into the liquid injection port 16 formed in the lid part 26. The liquid injection part 15 protrudes from the lid part 26.
図３に示すように、電池ホルダ３０は、矩形平板状の第１の被覆部３１を有している。第１の被覆部３１の長手方向両端には、第１の被覆部３１の厚み方向に延びる矩形平板状の第２の被覆部３２及び第３の被覆部３３が設けられている。第２の被覆部３２の長手方向第１端部３２ａ（第１の被覆部３１が設けられる端部とは反対側の端部）と、第３の被覆部３３の長手方向第１端部３３ａ（第１の被覆部３１が設けられる端部とは反対側の端部）には、各被覆部３２，３３の短手方向第１端部３２ｂ、３３ｂの間で延びる矩形平板状の第４の被覆部３４が設けられている。第４の被覆部３４は、厚み方向が被覆部３２，３３の短手方向と一致し、長手方向が第２の被覆部３２と第３の被覆部３３の対向方向に一致する。そして、第４の被覆部３４の厚み方向及び長手方向に直交する方向が、第４の被覆部３４の短手方向となる。 As shown in FIG. 3, the battery holder 30 has a first covering portion 31 having a rectangular flat plate shape. At both ends in the longitudinal direction of the first covering portion 31, a rectangular flat plate-like second covering portion 32 and a third covering portion 33 extending in the thickness direction of the first covering portion 31 are provided. A first longitudinal end 32 a of the second covering part 32 (an end opposite to the end provided with the first covering part 31) and a first longitudinal end 33 a of the third covering part 33. A rectangular flat plate-like fourth extending between the first end portions 32b and 33b in the short direction of the respective covering portions 32 and 33 is provided at (the end portion opposite to the end portion on which the first covering portion 31 is provided). The covering portion 34 is provided. The thickness direction of the fourth covering portion 34 coincides with the short direction of the covering portions 32 and 33, and the longitudinal direction thereof coincides with the opposing direction of the second covering portion 32 and the third covering portion 33. The direction perpendicular to the thickness direction and the longitudinal direction of the fourth covering portion 34 is the short direction of the fourth covering portion 34.
また、第４の被覆部３４の長手方向両端における第４の被覆部３４の短手方向の一端面上には、Ｕ字状をなすとともに、第４の被覆部３４の厚み方向に開口する端子収容部３５がそれぞれ設けられており、各端子収容部３５は、第２の被覆部３２及び第３の被覆部３３に連設されている。 Further, terminals that are U-shaped and open in the thickness direction of the fourth covering portion 34 are formed on one end surface in the short direction of the fourth covering portion 34 at both longitudinal ends of the fourth covering portion 34. Each accommodating portion 35 is provided, and each terminal accommodating portion 35 is connected to the second covering portion 32 and the third covering portion 33.
第４の被覆部３４の短手方向の一端面上には、端子収容部３５と隣り合って四角柱状のボルト挿通部３６が設けられている。ボルト挿通部３６の軸は、被覆部３２，３３の短手方向に延びている。ボルト挿通部３６には、ボルトＢが挿通される挿通孔３６ａがボルト挿通部３６の軸方向に貫通して設けられている。 On one end surface in the short direction of the fourth covering portion 34, a quadrangular prism-like bolt insertion portion 36 is provided adjacent to the terminal accommodating portion 35. The axis of the bolt insertion part 36 extends in the short direction of the covering parts 32 and 33. The bolt insertion part 36 is provided with an insertion hole 36 a through which the bolt B is inserted, penetrating in the axial direction of the bolt insertion part 36.
第２の被覆部３２及び第３の被覆部３３の長手方向第１端部３２ａ，３３ａには、各被覆部３２，３３と連設され、各被覆部３２，３３の長手方向に延びる矩形平板状の突出部３８が設けられている。また、第２の被覆部３２及び第３の被覆部３３の長手方向第２端部３２ｃ、３３ｃには、四角柱状の脚部３９が設けられている。脚部３９の軸は、被覆部３２，３３の短手方向に延びている。脚部３９には、ボルトＢが挿通される挿通孔３９ａが脚部３９の軸方向に貫通して設けられている。 A rectangular flat plate connected to each of the covering portions 32 and 33 at the first longitudinal ends 32 a and 33 a of the second covering portion 32 and the third covering portion 33 and extending in the longitudinal direction of each of the covering portions 32 and 33. A projecting portion 38 is provided. Further, square columnar leg portions 39 are provided on the second end portions 32 c and 33 c in the longitudinal direction of the second covering portion 32 and the third covering portion 33. The axis of the leg portion 39 extends in the short direction of the covering portions 32 and 33. The leg portion 39 is provided with an insertion hole 39 a through which the bolt B is inserted, penetrating in the axial direction of the leg portion 39.
図２に示すように、電池ホルダ３０は、電池セル２２同士を接続するバスバー１３を保護するためのバスバーカバー４１を保持している。バスバーカバー４１は、電池ホルダ３０の突出部３８の間に設けられている。バスバーカバー４１は、矩形平板状の本体４２と、本体４２の短手方向両端から本体４２の厚み方向に向けて延びる一対の矩形平板状の突出部４３とを有している。一対の突出部４３は、本体４２の短手方向両端の辺（本体４２の長辺）全体に亘って設けられている。本体４２には、突出部４３が設けられた面とは反対側の面から本体４２の厚み方向に延びる矩形平板状の一対の壁部４４，４５が設けられている。壁部４４，４５は、本体４２の短手方向に並んで設けられている。壁部４４，４５は、本体４２の短手方向両端の辺（本体４２の長辺）全体に亘って設けられている。壁部４４，４５の外面（壁部４４，４５において互いに対向する面とは反対側の面）間の距離は、電池ホルダ３０のボルト挿通部３６の互いに対向する面の間の距離よりも若干短い。 As shown in FIG. 2, the battery holder 30 holds a bus bar cover 41 for protecting the bus bar 13 that connects the battery cells 22 to each other. The bus bar cover 41 is provided between the protruding portions 38 of the battery holder 30. The bus bar cover 41 includes a rectangular flat plate-shaped main body 42 and a pair of rectangular flat plate-shaped protrusions 43 extending from both ends of the main body 42 in the lateral direction toward the thickness direction of the main body 42. The pair of protrusions 43 are provided over the entire sides (long sides of the main body 42) at both ends in the short direction of the main body 42. The main body 42 is provided with a pair of rectangular flat plate-like walls 44 and 45 extending in the thickness direction of the main body 42 from the surface opposite to the surface on which the protrusion 43 is provided. The wall portions 44 and 45 are provided side by side in the short direction of the main body 42. The wall portions 44, 45 are provided over the entire sides (long sides of the main body 42) at both ends in the short direction of the main body 42. The distance between the outer surfaces of the wall portions 44, 45 (the surface opposite to the surfaces facing each other in the wall portions 44, 45) is slightly larger than the distance between the surfaces facing each other of the bolt insertion portion 36 of the battery holder 30. short.
バスバーカバー４１は、突出部４３が電池ホルダ３０の突出部３８に沿うとともに、壁部４４，４５の外面がボルト挿通部３６に沿うように電池ホルダ３０に保持される。これにより、バスバーカバー４１は、本体４２における壁部４４，４５が設けられた面が電池セル２２の高さ方向一面（蓋部２６）と対向している。 The bus bar cover 41 is held by the battery holder 30 such that the protruding portion 43 extends along the protruding portion 38 of the battery holder 30 and the outer surfaces of the wall portions 44 and 45 extend along the bolt insertion portion 36. Thereby, as for the bus-bar cover 41, the surface in which the wall parts 44 and 45 in the main body 42 were provided has opposed the whole surface (cover part 26) of the battery cell 22 in the height direction.
本実施形態では、壁部４４，４５の外面は、ボルト挿通部３６と当接している。また、壁部４４，４５は、その先端（本体４２とは反対側の端部）が、電池セル２２の高さ方向一面（蓋部２６）と接触している。これにより、壁部４４，４５の内面、電池セル２２の高さ方向の一面、本体４２において突出部４３が設けられた面とは反対側の面に囲まれる領域に、流通路４６が区画される。したがって、本実施形態のダクトは、壁部４４，４５及び本体４２における壁部４４，４５の間の部分によって構成されており、バスバーカバー４１と一体となっている。圧力開放弁２８は、壁部４４，４５の間に位置しており、流通路４６に露出している。 In the present embodiment, the outer surfaces of the wall portions 44 and 45 are in contact with the bolt insertion portion 36. In addition, the wall portions 44 and 45 are in contact with one end (the lid portion 26) of the battery cell 22 in the height direction (the end portion opposite to the main body 42). As a result, the flow passage 46 is partitioned into a region surrounded by the inner surfaces of the wall portions 44 and 45, one surface in the height direction of the battery cell 22, and the surface of the main body 42 opposite to the surface provided with the protruding portion 43. The Therefore, the duct of the present embodiment is configured by the portions between the wall portions 44 and 45 and the wall portions 44 and 45 in the main body 42, and is integrated with the bus bar cover 41. The pressure release valve 28 is located between the wall portions 44 and 45 and is exposed to the flow passage 46.
本体４２の外面（本体４２における突出部４３が設けられる面）には、電池セル２２の充放電を制御する制御装置５１が載置されている。また、本体４２の外面には、制御装置５１を覆うカバー５２が設けられている。 A control device 51 that controls charging / discharging of the battery cell 22 is placed on the outer surface of the main body 42 (the surface on which the protruding portion 43 of the main body 42 is provided). A cover 52 that covers the control device 51 is provided on the outer surface of the main body 42.
次に、本実施形態の電池モジュール１０の作用について説明する。
電池セル２２に異常が生じ、電池セル２２の内部で気体が発生すると、電池セル２２の内圧が上昇する。電池セル２２の内圧の上昇に伴い、圧力開放弁２８が開放されると、圧力開放弁２８から排出された気体は、流通路４６に流入する。
Next, the operation of the battery module 10 of the present embodiment will be described.
When abnormality occurs in the battery cell 22 and gas is generated inside the battery cell 22, the internal pressure of the battery cell 22 increases. When the pressure release valve 28 is opened as the internal pressure of the battery cell 22 increases, the gas discharged from the pressure release valve 28 flows into the flow passage 46.
流通路４６に気体が流入すると、流通路４６の内圧が上昇し、これにより、本体４２、壁部４４，４５は、流通路４６の外部に向けて変形しようとする。壁部４４，４５の外面は、ボルト挿通部３６に沿っているため、壁部４４，４５が変形しようとすると、このボルト挿通部３６に変形を規制される。特に、ボルト挿通部３６には、金属製のボルトＢが挿通され、このボルトＢによってボルト挿通部３６が補強されている。このため、ボルト挿通部３６の変形抵抗は、バスバーカバー４１よりも高く、壁部４４，４５が変形することがより規制されている。 When the gas flows into the flow passage 46, the internal pressure of the flow passage 46 increases, whereby the main body 42 and the wall portions 44 and 45 tend to deform toward the outside of the flow passage 46. Since the outer surfaces of the wall portions 44 and 45 are along the bolt insertion portion 36, the deformation is restricted by the bolt insertion portion 36 when the wall portions 44 and 45 are to be deformed. In particular, a metal bolt B is inserted into the bolt insertion portion 36, and the bolt insertion portion 36 is reinforced by the bolt B. For this reason, the deformation resistance of the bolt insertion part 36 is higher than that of the bus bar cover 41, and the wall parts 44 and 45 are more restricted from being deformed.
また、本体４２が、流通路４６の外部に向けて変形しようとすると、制御装置５１及びカバー５２によって変形が抑制される。このため、ダクトを構成する壁部４４，４５及び本体４２は、電池ユニット２１を構成するユニット構成部材（ボルト挿通部３６、制御装置５１及びカバー５２）に沿って設けられることで、その変形が抑制されている。 Further, when the main body 42 tries to deform toward the outside of the flow passage 46, the deformation is suppressed by the control device 51 and the cover 52. For this reason, the wall portions 44 and 45 and the main body 42 constituting the duct are provided along the unit constituent members (the bolt insertion portion 36, the control device 51 and the cover 52) constituting the battery unit 21, so that the deformation thereof is achieved. It is suppressed.
ところで、壁部４４，４５や、本体４２を厚くすることで、壁部４４，４５や本体４２の変形を抑制することも考えられる。しかしながら、樹脂でバスバーカバー４１を製造する場合、各部位の厚みは、均等であることが望ましく、一部を厚くすると、反りや、ひけなどの原因となる。このため、壁部４４，４５や本体４２を厚くして変形を抑制する場合、突出部３８などの部位を含めて、バスバーカバー４１の全体を厚くする必要があり、バスバーカバー４１の大型化、製造コストの増大を招くおそれがある。 By the way, it is also conceivable to suppress deformation of the walls 44 and 45 and the main body 42 by increasing the thickness of the walls 44 and 45 and the main body 42. However, when manufacturing the bus bar cover 41 with resin, it is desirable that the thickness of each part is uniform. If a part of the bus bar cover 41 is made thick, warping or sinking may be caused. For this reason, when the wall portions 44 and 45 and the main body 42 are thickened to suppress deformation, it is necessary to thicken the entire bus bar cover 41 including the projecting portion 38 and the like. There is a risk of increasing manufacturing costs.
本実施形態のように、ユニット構成部材でダクトを補強することで、バスバーカバー４１を厚くすることなく、ダクトの変形を抑制することができる。
したがって、上記実施形態によれば、以下のような効果を得ることができる。
As in the present embodiment, by reinforcing the duct with the unit constituent members, the deformation of the duct can be suppressed without increasing the thickness of the bus bar cover 41.
Therefore, according to the above embodiment, the following effects can be obtained.
（１）壁部４４，４５は、ボルト挿通部３６に沿っているため、壁部４４，４５が変形することがボルト挿通部３６によって規制されている。したがって、圧力開放弁２８が開放されて、気体が流通路４６内に排出されても、壁部４４，４５が変形しにくく、壁部４４，４５の先端と電池セル２２との間に隙間が形成されにくい。このため、壁部４４，４５の先端と電池セル２２との間に隙間が形成されることで、電池セル２２から排出された気体が、この隙間から外部に漏れ出すことが抑制される。 (1) Since the wall portions 44 and 45 are along the bolt insertion portion 36, the deformation of the wall portions 44 and 45 is restricted by the bolt insertion portion 36. Therefore, even if the pressure release valve 28 is opened and gas is discharged into the flow passage 46, the walls 44 and 45 are not easily deformed, and there is a gap between the ends of the walls 44 and 45 and the battery cell 22. Hard to form. For this reason, a gap is formed between the tips of the wall portions 44 and 45 and the battery cell 22, whereby the gas discharged from the battery cell 22 is suppressed from leaking out from the gap.
（２）ダクトは、バスバーカバー４１と一体となっており、バスバーカバー４１の本体４２には、制御装置５１及び制御装置５１を覆うカバー５２が載置されている。このため、本体４２の変形を、制御装置５１及びカバー５２を用いて抑制することができる。 (2) The duct is integrated with the bus bar cover 41, and the main body 42 of the bus bar cover 41 is provided with a control device 51 and a cover 52 that covers the control device 51. For this reason, deformation of the main body 42 can be suppressed using the control device 51 and the cover 52.
（３）ボルト挿通部３６にボルトＢが挿通されていることで、ボルト挿通部３６は、ボルトＢによって補強されて、変形抵抗が、ダクトを構成する壁部４４，４５及び本体４２よりも高くなっている。このため、壁部４４，４５が変形しようとしたときに、より適切に壁部４４，４５の変形を抑制することができる。 (3) Since the bolt B is inserted into the bolt insertion portion 36, the bolt insertion portion 36 is reinforced by the bolt B, and the deformation resistance is higher than that of the wall portions 44, 45 and the main body 42 constituting the duct. It has become. For this reason, when the wall parts 44 and 45 are going to deform | transform, the deformation | transformation of the wall parts 44 and 45 can be suppressed more appropriately.
（４）電池ユニット２１を構成するユニット構成部材を利用して、壁部４４，４５の変形を抑制しているため、壁部４４，４５を補強するための専用の部材を設けることなく、壁部４４，４５の変形を抑制することができる。 (4) Since the deformation of the wall portions 44 and 45 is suppressed by using the unit constituent members constituting the battery unit 21, the wall is not provided with a dedicated member for reinforcing the wall portions 44 and 45. The deformation of the portions 44 and 45 can be suppressed.
（５）互いに離れる方向に変形する一対の壁部４４，４５がユニット構成部材に沿っているため、両壁部４４，４５の先端と電池セル２２との間に隙間ができにくく、流通路４６の気密性が確保されやすい。 (5) Since the pair of wall portions 44 and 45 that are deformed in the direction away from each other are along the unit constituent member, it is difficult to form a gap between the tip of the both wall portions 44 and 45 and the battery cell 22, and the flow passage 46. It is easy to ensure airtightness.
なお、実施形態は以下のように変更してもよい。
○図４に示すように、ダクト６１は、バスバーカバー４１と一体ではなくてもよい。ダクト６１は、筒状をなしており、軸方向に沿って形成される開口部６２を有している。そして、この開口部６２が電池セル２２における圧力開放弁２８が設けられる面と対向するように設けられることで、流通路４６が形成される。なお、ダクト６１の形状は、どのような形状であってもよく、軸方向に直交する方向の断面形状が、多角形や、円弧状をなすダクト６１などを用いてもよい。
In addition, you may change embodiment as follows.
As shown in FIG. 4, the duct 61 may not be integrated with the bus bar cover 41. The duct 61 has a cylindrical shape and has an opening 62 formed along the axial direction. And this flow path 46 is formed because this opening part 62 is provided so that the surface in which the pressure release valve 28 in the battery cell 22 is provided may be provided. The duct 61 may have any shape, and a duct 61 having a polygonal or arcuate cross-sectional shape in a direction orthogonal to the axial direction may be used.
○注液部１５、接続端子２７など、電池セル２２を構成する電池セル構成部材に壁部４４，４５の外面が沿うようにしてもよい。また、電池セル２２間に、電池セル２２の放熱を行う伝熱プレートが設けられる場合には、この伝熱プレートに壁部４４，４５の外面が沿うようにしてもよい。すなわち、ユニット構成部材とは、電池セル２２、電池セル２２を保持する電池ホルダ３０、電池セル２２の充放電に関わるバスバー１３や制御装置５１、電池セル２２の放熱を行う伝熱プレートなど、電池セル２２に関する部材であれば、どのような部材であってもよい。 The outer surfaces of the wall portions 44 and 45 may be along battery cell constituent members that constitute the battery cell 22 such as the liquid injection portion 15 and the connection terminal 27. Further, when a heat transfer plate for radiating the battery cell 22 is provided between the battery cells 22, the outer surfaces of the wall portions 44 and 45 may be along the heat transfer plate. That is, the unit constituent member includes a battery cell 22, a battery holder 30 that holds the battery cell 22, a bus bar 13 that relates to charging / discharging of the battery cell 22, a control device 51, a heat transfer plate that radiates the battery cell 22, and the like. Any member may be used as long as it is a member related to the cell 22.
○ユニット構成部材は、ダクトよりも変形抵抗が低くてもよい。この場合であっても、ダクトがユニット構成部材で補強されることで、ダクトの変形が抑制される。
○壁部４４，４５とボルト挿通部３６は、当接していなくてもよく、壁部４４，４５とボルト挿通部３６との間に若干の隙間が形成されていてもよい。流通路４６の内圧が高まり、壁部４４，４５が流通路４６の外部に向けて変形したときに、壁部４４，４５とボルト挿通部３６が当接して、それ以上の変形を抑制できればよい。
The unit component member may have a lower deformation resistance than the duct. Even in this case, deformation of the duct is suppressed by reinforcing the duct with the unit constituent members.
The wall portions 44 and 45 and the bolt insertion portion 36 may not be in contact with each other, and a slight gap may be formed between the wall portions 44 and 45 and the bolt insertion portion 36. When the internal pressure of the flow passage 46 is increased and the wall portions 44 and 45 are deformed toward the outside of the flow passage 46, the wall portions 44 and 45 and the bolt insertion portion 36 may be brought into contact with each other to suppress further deformation. .
○実施形態では、ボルト挿通部３６（ユニット構成部材）に金属製のボルトＢが挿通されることで、ボルト挿通部３６の変形抵抗が大きくされているが、これに限られない。例えば、ボルト挿通部３６（ユニット構成部材）を壁部４４，４５よりも剛性の高い材料で形成してもよいし、ユニット構成部材の厚みを壁部４４，４５よりも厚くすることでユニット構成部材の変形抵抗をダクトよりも高くしてもよい。 In the embodiment, the deformation resistance of the bolt insertion portion 36 is increased by inserting the metal bolt B through the bolt insertion portion 36 (unit component member), but the present invention is not limited to this. For example, the bolt insertion portion 36 (unit component member) may be formed of a material having rigidity higher than that of the wall portions 44 and 45, or the unit configuration is formed by making the thickness of the unit component member thicker than that of the wall portions 44 and 45. The deformation resistance of the member may be higher than that of the duct.
○壁部４４，４５の先端は、電池セル２２に接していなくてもよく、例えば、スポンジなどの介在物が壁部４４，４５と電池セル２２との間に介在されていてもよい。
○電池セル２２として、角型電池以外の円筒形電池などを用いてもよい。
The tips of the wall portions 44 and 45 may not be in contact with the battery cell 22, and for example, inclusions such as sponges may be interposed between the wall portions 44 and 45 and the battery cell 22.
As the battery cell 22, a cylindrical battery other than the square battery may be used.
○ダクトの外面の一部がユニット構成部材に沿っていてもよい。例えば、一対の壁部４４，４５の外面のみがユニット構成部材に沿っていてもよいし、本体４２の外面のみがユニット構成部材に沿っていてもよい。なお、ダクトの一部が対向する壁部（実施形態では、壁部４４及び壁部４５）によって構成される場合、対向する壁部は互いに離間する方向に変形する。このため、ダクトの外面の一部にユニット構成部材を設ける場合、少なくとも対向する一対の壁部の外面にユニット構成部材を設けることが好ましい。 A part of the outer surface of the duct may be along the unit constituent member. For example, only the outer surfaces of the pair of wall portions 44 and 45 may be along the unit constituent member, or only the outer surface of the main body 42 may be along the unit constituent member. In addition, when a part of duct is comprised by the wall part which opposes (in the embodiment, the wall part 44 and the wall part 45), the opposing wall part deform | transforms in the direction spaced apart. For this reason, when providing a unit structural member in a part of outer surface of a duct, it is preferable to provide a unit structural member in the outer surface of a pair of wall part which opposes at least.
次に、上記実施形態及び変形例から把握することができる技術的思想について以下に追記する。
（イ）前記ダクトにおける前記流通路を区画する内面とは反対の面の少なくとも一部は、前記電池ユニットを構成するユニット構成部材に当接していることを特徴とする請求項１に記載の電池モジュール。
Next, the technical idea that can be grasped from the embodiment and the modified examples will be described below.
(B) The battery according to claim 1, wherein at least a part of a surface of the duct opposite to the inner surface that defines the flow passage is in contact with a unit component member that constitutes the battery unit. module.
（ロ）前記ダクトにおける前記流通路を区画する内面とは反対の面の少なくとも一部は、変形したときに前記ユニット構成部材に当接することを特徴とする請求項１に記載の電池モジュール。 (B) The battery module according to claim 1, wherein at least a part of a surface of the duct opposite to the inner surface that defines the flow passage is in contact with the unit constituent member when deformed.
１０…電池モジュール、２１…電池ユニット、２２…電池セル、２３…ケース、２４…電極組立体、２８…圧力開放弁、３０…電池ホルダ、３６…ボルト挿通部、４１…バスバーカバー、４２…本体、４４，４５…壁部、４６…流通路。 DESCRIPTION OF SYMBOLS 10 ... Battery module, 21 ... Battery unit, 22 ... Battery cell, 23 ... Case, 24 ... Electrode assembly, 28 ... Pressure release valve, 30 ... Battery holder, 36 ... Bolt insertion part, 41 ... Bus bar cover, 42 ... Main body 44, 45 ... walls, 46 ... flow passages.
Claims (4)
内部に気体の流通路が区画されるダクトと、を備え、前記圧力開放弁が前記流通路に露出した電池モジュールであって、
前記電池ユニットは、前記複数の電池セルをそれぞれ保持する複数の電池ホルダを備え、
前記電池ホルダは、前記複数の電池セルを連結すべくボルトが挿通されるボルト挿通部を有し、
前記ダクトは、前記圧力開放弁と対向する本体と、該本体から前記ケースにおける前記圧力開放弁が設けられた面に向けて延びる一対の壁部とを有し、前記ボルト挿通部は、前記一対の壁部の離間する方向の外面に沿うように配置されていることを特徴とする電池モジュール。 A battery unit comprising a plurality of battery cells containing an electrode assembly in a case having a pressure release valve;
A duct in which a gas flow passage is defined, and a battery module in which the pressure release valve is exposed to the flow passage,
The battery unit includes a plurality of battery holders that respectively hold the plurality of battery cells.
The battery holder has a bolt insertion part through which a bolt is inserted to connect the plurality of battery cells,
The duct has a main body facing the pressure release valve, and a pair of wall portions extending from the main body toward a surface of the case where the pressure release valve is provided, and the bolt insertion portion is the pair of bolts. It arrange | positions so that the outer surface of the direction which separates the wall part of this may be followed.
内部に気体の流通路が区画されるダクトと、を備え、前記圧力開放弁が前記流通路に露出した電池モジュールであって、
前記電池ユニットは、前記複数の電池セルをそれぞれ保持する複数の電池ホルダを備え、
前記ダクトは、前記圧力開放弁と対向する本体と、該本体から前記ケースにおける前記圧力開放弁が設けられた面に向けて延びる一対の壁部とを有し、該一対の壁部は、先端が前記電池セルの面に接触しており、
前記一対の壁部の内面、前記電池セルの面、及び、前記本体によって前記流通路が区画されており、
前記ダクトにおける前記流通路を区画する前記一対の壁部の内面とは反対の面の少なくとも一部が前記電池ユニットを構成する前記電池ホルダに沿うように配置されていることを特徴とする電池モジュール。 A battery unit comprising a plurality of battery cells containing an electrode assembly in a case having a pressure release valve;
A duct in which a gas flow passage is defined, and a battery module in which the pressure release valve is exposed to the flow passage,
The battery unit includes a plurality of battery holders that respectively hold the plurality of battery cells.
The duct has a main body facing the pressure release valve, and a pair of wall portions extending from the main body toward a surface of the case where the pressure release valve is provided. Is in contact with the surface of the battery cell,
The flow path is defined by the inner surface of the pair of wall portions, the surface of the battery cell, and the main body,
A battery module, wherein at least a part of surfaces opposite to the inner surfaces of the pair of wall portions defining the flow passage in the duct is disposed along the battery holder constituting the battery unit. .
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014009827A JP6028742B2 (en) | 2014-01-22 | 2014-01-22 | Battery module |
| PCT/JP2015/051277 WO2015111556A1 (en) | 2014-01-22 | 2015-01-19 | Cell module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014009827A JP6028742B2 (en) | 2014-01-22 | 2014-01-22 | Battery module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2015138673A JP2015138673A (en) | 2015-07-30 |
| JP6028742B2 true JP6028742B2 (en) | 2016-11-16 |
Family
ID=53681360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2014009827A Expired - Fee Related JP6028742B2 (en) | 2014-01-22 | 2014-01-22 | Battery module |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6028742B2 (en) |
| WO (1) | WO2015111556A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6926583B2 (en) * | 2017-03-27 | 2021-08-25 | 株式会社豊田自動織機 | Battery module |
| JPWO2021199595A1 (en) * | 2020-03-31 | 2021-10-07 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3934900B2 (en) * | 2001-09-25 | 2007-06-20 | 矢崎総業株式会社 | Power supply |
| JP5431036B2 (en) * | 2009-06-15 | 2014-03-05 | 三洋電機株式会社 | Assembled battery for vehicle, vehicle equipped with the same, and separator for assembled battery |
| JP2012113896A (en) * | 2010-11-23 | 2012-06-14 | Denso Corp | Battery pack |
| WO2012147150A1 (en) * | 2011-04-25 | 2012-11-01 | 日立ビークルエナジー株式会社 | Battery assembly and single cell |
| JP2013171746A (en) * | 2012-02-21 | 2013-09-02 | Sanyo Electric Co Ltd | Power supply device, and vehicle and power storage device having the same |
| JP2013229182A (en) * | 2012-04-25 | 2013-11-07 | Sanyo Electric Co Ltd | Power supply device, vehicle including power supply device, and power storage device |
| JP5590165B2 (en) * | 2013-01-31 | 2014-09-17 | 株式会社豊田自動織機 | Battery module |
-
2014
- 2014-01-22 JP JP2014009827A patent/JP6028742B2/en not_active Expired - Fee Related
-
2015
- 2015-01-19 WO PCT/JP2015/051277 patent/WO2015111556A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015111556A1 (en) | 2015-07-30 |
| JP2015138673A (en) | 2015-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5737351B2 (en) | Battery module | |
| US10003054B2 (en) | Power source pack | |
| EP2958167B1 (en) | Battery module | |
| US9985259B2 (en) | Battery pack | |
| WO2014119722A1 (en) | Battery module | |
| JP6608653B2 (en) | Battery module | |
| WO2018003468A1 (en) | Battery block | |
| JP6220536B2 (en) | Duct holding structure of battery assembly | |
| US20190305262A1 (en) | Battery block and battery module | |
| US20150280190A1 (en) | Energy storage apparatus | |
| JP6978506B2 (en) | Electrical connection member storage case and battery module | |
| JP6629140B2 (en) | Power storage module | |
| JPWO2015118597A1 (en) | Battery module | |
| US20140093756A1 (en) | Assembled battery | |
| JP2018129251A (en) | Battery pack | |
| US20160028131A1 (en) | Battery module | |
| JPWO2015019570A1 (en) | Battery unit | |
| KR102296045B1 (en) | Electric storage apparatus | |
| JPWO2017047371A1 (en) | Terminal and wiring module | |
| US9711766B2 (en) | Energy storage apparatus | |
| JP2015156302A (en) | battery pack | |
| JP6028742B2 (en) | Battery module | |
| EP3121893B1 (en) | Battery module and method for assembling battery module | |
| JP5929670B2 (en) | Battery module and battery pack | |
| JP6995882B2 (en) | Battery module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20150422 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20151006 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20151207 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20160510 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20160803 |
|
| A911 | Transfer to examiner for re-examination before appeal (zenchi) |
Free format text: JAPANESE INTERMEDIATE CODE: A911 Effective date: 20160809 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20160920 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20161003 |
|
| R151 | Written notification of patent or utility model registration |
Ref document number: 6028742 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R151 |
|
| LAPS | Cancellation because of no payment of annual fees |