JP2022026588A - Battery pack cell expansion detection device - Google Patents

Battery pack cell expansion detection device Download PDF

Info

Publication number
JP2022026588A
JP2022026588A JP2020130131A JP2020130131A JP2022026588A JP 2022026588 A JP2022026588 A JP 2022026588A JP 2020130131 A JP2020130131 A JP 2020130131A JP 2020130131 A JP2020130131 A JP 2020130131A JP 2022026588 A JP2022026588 A JP 2022026588A
Authority
JP
Japan
Prior art keywords
cell
conductive member
battery pack
detection device
cell expansion
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.)
Pending
Application number
JP2020130131A
Other languages
Japanese (ja)
Inventor
剛 小出
Takeshi Koide
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
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 Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP2020130131A priority Critical patent/JP2022026588A/en
Publication of JP2022026588A publication Critical patent/JP2022026588A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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

Landscapes

  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

To provide a battery pack cell expansion detection device that can accurately detect cell expansion of a battery pack by suppressing the occurrence of erroneous determination due to the influence of measurement accuracy using a simple configuration.SOLUTION: A cell expansion detection device 2 includes a contact portion 10 having a first conductive member 11, a second conductive member 12, and an insulating member 13, and a detection unit 20 that detects the presence or absence of expansion of a cell 31 of a battery pack 3 by detecting the presence or absence of continuity between the first conductive member 11 and the second conductive member 12. The contact portion 10 is arranged at a predetermined position inside a battery case 40 of the battery pack 3, and the predetermined position is a position at which the contact portion 10 is separated from an end portion 301 of a laminate 30 when the cell 31 does not expand, and is a position at which each of the first conductive member 11 and the second conductive member 12 of the contact portion 10 is brought into contact with the end portion 301 of the laminate 30 when the cell 31 expands by a predetermined value or more in the stacking direction.SELECTED DRAWING: Figure 2

Description

本発明は、電池パックのセル膨張検出装置に関する。 The present invention relates to a cell expansion detection device for a battery pack.

Ｌｉ電池等の電池パックでは、電池パックが放電充電を繰り返されることで、各セルの内部の電解液が膨張し、又は各セルの内部にガスが発生することによって、セルの膨張が発生する。また、セルが膨張した場合、電池パックが劣化して使用できなくなるため、電池パックの交換を行う必要がある。このような電池パックのセル膨張を検出するため、従来から、電池パックのセル膨張検出装置が採用されている。 In a battery pack such as a Li battery, the battery pack is repeatedly discharged and charged, so that the electrolytic solution inside each cell expands, or gas is generated inside each cell, so that the cell expands. Further, when the cell expands, the battery pack deteriorates and cannot be used, so it is necessary to replace the battery pack. In order to detect such cell expansion of a battery pack, a cell expansion detection device for a battery pack has been conventionally adopted.

例えば、特許文献１には、第１群の複数のセルと、第２群の複数のセルと、第１群のセルの電池缶の主壁に備えられた第１の導電体と、第２群のセルの電池缶の主壁に備えられた第２の導電体と、第１導電体と第２導電体との間の導電性を検知する検知部とを備え、第１群のセルと第２群のセルは交互に配置され、第１導電体と第２導電体は対向し、交互に配置された各セルの間には、空隙を有し、検知部は、対向するいずれかの導電体の接触によって、セルの膨らみを検知する、電池パックが開示されている。すなわち、特許文献１には、第１の導電体と、第２の導電体と、検知部とを有し、積層された相隣する両セルの間に設けられた検出センサが開示されている。 For example, Patent Document 1 describes a plurality of cells in the first group, a plurality of cells in the second group, a first conductor provided on the main wall of a battery can of the cells in the first group, and a second. A second conductor provided on the main wall of the battery can of the cells of the group, and a detection unit for detecting the conductivity between the first conductor and the second conductor are provided with the cells of the first group. The cells of the second group are arranged alternately, the first conductor and the second conductor face each other, there is a gap between each of the cells arranged alternately, and the detection unit is one of facing each other. A battery pack is disclosed that detects swelling of a cell by contact with a conductor. That is, Patent Document 1 discloses a detection sensor having a first conductor, a second conductor, and a detection unit, and provided between two adjacent cells stacked therein. ..

特開２０１５－１１５２１９号公報Japanese Unexamined Patent Publication No. 2015-115219

ところで、特許文献１に開示された検出センサのようなセル膨張検出装置は、セル間に生じた圧力が所定値以上であるか否かをセル膨張の判断基準として、電池パックのセル膨張の有無を検出している。しかしながら、このような判断基準を採用するセル膨張検出装置の検出の正確性は、セル膨張検出装置自体の測定精度に大きく依存している。セル膨張検出装置の測定精度が不良である場合、セル膨張を誤判断する可能性がある。すなわち、膨張していないセルが膨張したセルとして検出され、又は膨張したセルが膨張していないセルとして検出されることがある。その結果、電池パックのセル膨張を正確に検出することができなくなり、電池パックの性能及び使用安全性に大きな影響を与える。 By the way, in the cell expansion detection device such as the detection sensor disclosed in Patent Document 1, the presence or absence of cell expansion of the battery pack is determined based on whether or not the pressure generated between the cells is equal to or higher than a predetermined value. Is being detected. However, the detection accuracy of the cell expansion detection device that adopts such a criterion largely depends on the measurement accuracy of the cell expansion detection device itself. If the measurement accuracy of the cell expansion detection device is poor, the cell expansion may be misjudged. That is, a non-expanded cell may be detected as an expanded cell, or an expanded cell may be detected as a non-expanded cell. As a result, the cell expansion of the battery pack cannot be accurately detected, which greatly affects the performance and safety of use of the battery pack.

本発明はこのような事情に鑑みて発明されたものであり、本発明の目的は、簡易な構成を用いて、測定精度の影響による誤判断の発生を抑制し、正確に電池パックのセル膨張を検出することができる電池パックのセル膨張検出装置を提供することである。 The present invention has been invented in view of such circumstances, and an object of the present invention is to suppress the occurrence of erroneous determination due to the influence of measurement accuracy by using a simple configuration, and accurately expand the cell of the battery pack. It is to provide the cell expansion detection apparatus of the battery pack which can detect.

本発明の一態様に係る電池パックのセル膨張検出装置は、積層方向にて導電性の端部を有する積層体と、積層体を収容する電池ケースとを備える電池パックに用いられ、セルの膨張を検出するための電池パックのセル膨張検出装置であって、第１導電部材と、第１導電部材と離間するように配置された第２導電部材と、第１導電部材及び第２導電部材を連結する絶縁部材とを有する接触部と、第１導電部材と第２導電部材との間の導通の有無を検出することで、セルの膨張の有無を検出する検出部と、を備え、接触部は、電池ケースの内部の所定位置に配置されており、所定位置は、セルが膨張していないときは接触部を積層体の端部から離間させる位置であるとともに、セルが積層方向に所定以上膨張したときは接触部の第１導電部材及び第２導電部材のそれぞれを積層体の端部と接触させる位置である。 The cell expansion detection device for a battery pack according to one aspect of the present invention is used for a battery pack including a laminate having a conductive end in the stacking direction and a battery case for accommodating the laminate, and expands the cell. A cell expansion detection device for a battery pack for detecting the above, the first conductive member, the second conductive member arranged so as to be separated from the first conductive member, the first conductive member, and the second conductive member. A contact portion having a contact portion having an insulating member to be connected and a detection portion for detecting the presence / absence of expansion of a cell by detecting the presence / absence of continuity between the first conductive member and the second conductive member are provided, and the contact portion is provided. Is located at a predetermined position inside the battery case, and the predetermined position is a position where the contact portion is separated from the end portion of the laminated body when the cell is not expanded, and the cell is at least a predetermined position in the stacking direction. When expanded, it is a position where each of the first conductive member and the second conductive member of the contact portion is brought into contact with the end portion of the laminated body.

上記態様の電池パックのセル膨張検出装置は、セル膨張の判断基準として、導電性の積層体の端部と第１導電部材及び第２導電部材との接触による、第１導電部材と第２導電部材との間の導通の有無を利用して電池パックのセル膨張の有無を検出している。すなわち、電池パックのセル膨張検出装置は、導電性の積層体の端部と第１導電部材及び第２導電部材との接触の有無を判断することで、電池パックのセル膨張の有無を検出することができる。このような判断基準を採用することによって、セル膨張検出装置の測定精度を安定かつ良好に維持することができる。そして、セル膨張検出装置の検出の正確性は、セル膨張検出装置自体の測定精度による影響を受けることがほぼない。このため、本実施形態に係るセル膨張検出装置は、測定精度の影響による誤判断の発生を抑制し、正確に電池パックのセルの膨張を検出することができる。また、本実施形態に係るセル膨張検出装置は、簡易な構成を採用している。このため、複雑な構成を有するセル膨張検出装置に比べて、各構成の不具合による測定精度への影響を抑制することができるとともに、装置の製造コストを軽減することができる。 The cell expansion detection device of the battery pack according to the above aspect has the first conductive member and the second conductive member by contacting the end portion of the conductive laminate with the first conductive member and the second conductive member as a criterion for determining the cell expansion. The presence or absence of cell expansion of the battery pack is detected by utilizing the presence or absence of continuity with the member. That is, the cell expansion detection device of the battery pack detects the presence or absence of cell expansion of the battery pack by determining the presence or absence of contact between the end portion of the conductive laminate and the first conductive member and the second conductive member. be able to. By adopting such a determination standard, the measurement accuracy of the cell expansion detection device can be maintained stably and satisfactorily. The detection accuracy of the cell expansion detection device is hardly affected by the measurement accuracy of the cell expansion detection device itself. Therefore, the cell expansion detection device according to the present embodiment can suppress the occurrence of erroneous determination due to the influence of the measurement accuracy and can accurately detect the expansion of the cell of the battery pack. Further, the cell expansion detection device according to the present embodiment adopts a simple configuration. Therefore, as compared with the cell expansion detection device having a complicated configuration, it is possible to suppress the influence on the measurement accuracy due to the defect of each configuration and reduce the manufacturing cost of the device.

本発明によれば、簡易な構成を用いて、測定精度の影響による誤判断の発生を抑制し、正確に電池パックのセル膨張を検出することができる電池パックのセル膨張検出装置を提供することが可能になる。 According to the present invention, it is possible to provide a battery pack cell expansion detection device capable of accurately detecting cell expansion of a battery pack by suppressing the occurrence of erroneous determination due to the influence of measurement accuracy by using a simple configuration. Will be possible.

本実施形態に係る電池パックユニットにおけるセルが膨張していないときの各構成の状態を示す図である。It is a figure which shows the state of each configuration when the cell in the battery pack unit which concerns on this embodiment does not expand. 本実施形態に係る電池パックユニットにおけるセルが膨張したときの各構成の状態を示す図である。It is a figure which shows the state of each structure when the cell in the battery pack unit which concerns on this embodiment expands.

［本実施形態］
以下では、図１及び図２を参照しつつ、本実施形態について説明する。図１は、セル３１が膨張していないとき、本実施形態に係る電池パックユニット１の各構成の状態を示す図である。図２は、セル３１が膨張したとき、本実施形態に係る電池パックユニット１の各構成の状態を示す図である。 [The present embodiment]
Hereinafter, the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a diagram showing a state of each configuration of the battery pack unit 1 according to the present embodiment when the cell 31 is not expanded. FIG. 2 is a diagram showing the state of each configuration of the battery pack unit 1 according to the present embodiment when the cell 31 is expanded.

＜電池パックユニット１＞
本実施形態に係る電池パックユニット１は、セル膨張の検出機能付きの補機バッテリの一例である。図１に示すように、電池パックユニット１は、電池パック３と、電池パック３に設けられたセル膨張検出装置２とを備える。 <Battery pack unit 1>
The battery pack unit 1 according to the present embodiment is an example of an auxiliary battery having a cell expansion detection function. As shown in FIG. 1, the battery pack unit 1 includes a battery pack 3 and a cell expansion detection device 2 provided in the battery pack 3.

（電池パック３）
電池パック３は、例えば角形の駆動用Ｌｉ電池である。図１に示すように、電池パック３は、Ｌｉ電池の本体を構成する積層体３０と、積層体３０を収容する電池ケース４０とを有する。 (Battery pack 3)
The battery pack 3 is, for example, a square driving Li battery. As shown in FIG. 1, the battery pack 3 has a laminated body 30 constituting the main body of the Li battery and a battery case 40 for accommodating the laminated body 30.

積層体３０は、複数のセル３１によって積層されている。各セル３１は、導電性の材料によって構成されたセルケース３２を有する。セルケース３２は、箱部材であり、矩形体をなしている。複数のセル３１は、複数のセルケース３２の各々の厚み方向に沿って積層され、積層体３０を構成している。 The laminated body 30 is laminated by a plurality of cells 31. Each cell 31 has a cell case 32 made of a conductive material. The cell case 32 is a box member and has a rectangular shape. The plurality of cells 31 are laminated along the thickness direction of each of the plurality of cell cases 32 to form the laminated body 30.

積層体３０の外周面は、導電性のセルケース３２によって構成されているため、導電性を有する。このため、積層体３０の、積層方向の端部３０１及び端部３０２も、導電性を有する。端部３０１は、セル膨張検出装置２と対向するように配置されている端部である。 Since the outer peripheral surface of the laminated body 30 is composed of the conductive cell case 32, it has conductivity. Therefore, the end portion 301 and the end portion 302 of the laminated body 30 in the stacking direction also have conductivity. The end portion 301 is an end portion arranged so as to face the cell expansion detection device 2.

また、積層体３０、すなわち複数のセル３１の各々は、使用により劣化する。具体的には、図２に示すように、各セル３１のセルケース３２は、電解液やガスの膨張力を受けて、概ね積層方向に膨張する。言い換えれば、積層体３０は、積層方向に膨張する。この場合、電池パック３が使用できなくなる状態になる。 Further, each of the laminated body 30, that is, the plurality of cells 31, is deteriorated by use. Specifically, as shown in FIG. 2, the cell case 32 of each cell 31 receives the expansion force of the electrolytic solution or gas and expands substantially in the stacking direction. In other words, the laminated body 30 expands in the laminated direction. In this case, the battery pack 3 becomes unusable.

電池ケース４０は、箱部材であり、矩形体をなしている。電池ケース４０の内部には、積層体３０及びセル膨張検出装置２を収容するための内部空間４１が形成されている。 The battery case 40 is a box member and has a rectangular shape. Inside the battery case 40, an internal space 41 for accommodating the laminated body 30 and the cell expansion detection device 2 is formed.

（セル膨張検出装置２）
セル膨張検出装置２は、電池パックのセルの膨張を検出することで、電池パックの交換時期を検知するための検出センサの一例である。図１に示すように、セル膨張検出装置２は、電池パック３の電池ケース４０の内壁面に設けられている。また、セル膨張検出装置２は、膨張したセル３１と接触可能な接触部１０と、接触部１０の制御及び接触部１０における導通の有無を検出する検出部２０とを有する。 (Cell expansion detection device 2)
The cell expansion detection device 2 is an example of a detection sensor for detecting the replacement time of the battery pack by detecting the expansion of the cell of the battery pack. As shown in FIG. 1, the cell expansion detection device 2 is provided on the inner wall surface of the battery case 40 of the battery pack 3. Further, the cell expansion detection device 2 has a contact portion 10 capable of contacting the expanded cell 31, and a detection unit 20 that controls the contact portion 10 and detects the presence or absence of continuity in the contact portion 10.

接触部１０は、第１導電部材１１と、第１導電部材と離間するように配置された第２導電部材１２と、第１導電部材１１及び第２導電部材１２を絶縁的に連結している絶縁部材１３とを有する。 The contact portion 10 insulates the first conductive member 11, the second conductive member 12 arranged so as to be separated from the first conductive member, and the first conductive member 11 and the second conductive member 12. It has an insulating member 13.

また、接触部１０は、電池ケース４０の内部の所定位置に配置されている。ここで、所定位置は、図１に示すように、セル３１が膨張していないときは、接触部１０を積層体３０の端部３０１から離間させる位置でありつつ、図２に示すように、セル３１が積層方向に所定以上膨張したときは、接触部１０の第１導電部材１１及び第２導電部材１２のそれぞれを積層体３０の端部３０１と接触させる位置でもある。 Further, the contact portion 10 is arranged at a predetermined position inside the battery case 40. Here, as shown in FIG. 1, the predetermined position is a position where the contact portion 10 is separated from the end portion 301 of the laminated body 30 when the cell 31 is not expanded, as shown in FIG. When the cell 31 expands by a predetermined amount or more in the stacking direction, it is also a position where each of the first conductive member 11 and the second conductive member 12 of the contact portion 10 is brought into contact with the end portion 301 of the laminated body 30.

また、図１に示された接触部１０は積層体３０の端部３０１と離間する場合、積層体３０の端部３０１から接触部１０の第１導電部材１１及び第２導電部材１２までの距離は、「Ｌ」である。セル３１が積層方向に所定以上膨張したときに係る所定膨張量は、積層方向に「Ｌ」以上の膨張量である。 Further, when the contact portion 10 shown in FIG. 1 is separated from the end portion 301 of the laminated body 30, the distance from the end portion 301 of the laminated body 30 to the first conductive member 11 and the second conductive member 12 of the contact portion 10. Is "L". The predetermined expansion amount when the cell 31 expands by a predetermined amount or more in the stacking direction is an expansion amount of "L" or more in the stacking direction.

検出部２０は、接触部１０に接続されている。図１に示すように、検出部２０は、電池ケース４０の内部の所定位置に配置されている。なお、検出部２０は、電池ケース４０の外部に配置してもよい。 The detection unit 20 is connected to the contact unit 10. As shown in FIG. 1, the detection unit 20 is arranged at a predetermined position inside the battery case 40. The detection unit 20 may be arranged outside the battery case 40.

検出部２０は、接触部１０の第１導電部材１１に微電流を提供することができる。また、検出部２０は、第１導電部材１１に微電流を提供する場合、第１導電部材１１と第２導電部材１２との間の導通の有無を検出することができる。このように、検出部２０は、第１導電部材１１と第２導電部材１２との間の導通の有無を検出することで、電池パック３のセル３１の膨張の有無の検出を実現している。 The detection unit 20 can provide a minute current to the first conductive member 11 of the contact unit 10. Further, when the detection unit 20 provides a minute current to the first conductive member 11, the detection unit 20 can detect the presence or absence of conduction between the first conductive member 11 and the second conductive member 12. In this way, the detection unit 20 detects the presence or absence of expansion of the cell 31 of the battery pack 3 by detecting the presence or absence of continuity between the first conductive member 11 and the second conductive member 12. ..

＜セル膨張検出装置２の検出原理及び効果＞
続いて、図１及び図２を参照しつつ、セル膨張検出装置２が電池パック３のセル３１の膨張の有無を検出する原理及び効果について説明する。 <Detection principle and effect of cell expansion detection device 2>
Subsequently, with reference to FIGS. 1 and 2, the principle and effect of the cell expansion detection device 2 for detecting the presence or absence of expansion of the cell 31 of the battery pack 3 will be described.

（原理）
セル３１が膨張していない場合、図１に示すように、積層体３０の端部３０１、すなわちセル３１のセルケース３２は、セル膨張検出装置２の接触部１０と離間している。言い換えれば、セル３１のセルケース３２は、接触部１０の第１導電部材１１及び第２導電部材１２のいずれとも接触していない。この場合、積層体３０の端部３０１から第１導電部材１１及び第２導電部材１２までの距離は、「Ｌ」である。 (principle)
When the cell 31 is not expanded, as shown in FIG. 1, the end portion 301 of the laminated body 30, that is, the cell case 32 of the cell 31, is separated from the contact portion 10 of the cell expansion detection device 2. In other words, the cell case 32 of the cell 31 is not in contact with either the first conductive member 11 or the second conductive member 12 of the contact portion 10. In this case, the distance from the end portion 301 of the laminated body 30 to the first conductive member 11 and the second conductive member 12 is “L”.

よって、セル３１が膨張していない場合、接触部１０の第１導電部材１１及び第２導電部材１２は、絶縁部材１３のみによって連結されている。このため、第１導電部材１１に流れている電流は、絶縁部材１３によって遮断され、第２導電部材１２に流れることはない。すなわち、絶縁部材１３によって、第１導電部材１１及び第２導電部材１２は導通されていない。 Therefore, when the cell 31 is not expanded, the first conductive member 11 and the second conductive member 12 of the contact portion 10 are connected only by the insulating member 13. Therefore, the current flowing through the first conductive member 11 is cut off by the insulating member 13 and does not flow through the second conductive member 12. That is, the first conductive member 11 and the second conductive member 12 are not conducted by the insulating member 13.

その結果、検出部２０は、第１導電部材１１と第２導電部材１２との間の導通を検出することがない。言い換えれば、検出部２０によって、第１導電部材１１と第２導電部材１２との間の導通を検出しない場合、電池パック３のセル３１は膨張していない。 As a result, the detection unit 20 does not detect the continuity between the first conductive member 11 and the second conductive member 12. In other words, when the detection unit 20 does not detect the continuity between the first conductive member 11 and the second conductive member 12, the cell 31 of the battery pack 3 is not expanded.

これに対して、セル３１が積層方向に所定以上膨張した場合、図２に示すように、積層体３０の端部３０１、すなわちセル３１のセルケース３２は、セル膨張検出装置２の接触部１０と接触している。言い換えれば、セル３１のセルケース３２は、接触部１０の第１導電部材１１及び第２導電部材１２のそれぞれと接触している。この場合、積層体３０の端部３０１から第１導電部材１１及び第２導電部材１２までの距離は、「Ｌ」から「０」になっている。 On the other hand, when the cell 31 expands by a predetermined amount or more in the stacking direction, as shown in FIG. 2, the end portion 301 of the laminated body 30, that is, the cell case 32 of the cell 31, is the contact portion 10 of the cell expansion detecting device 2. Is in contact with. In other words, the cell case 32 of the cell 31 is in contact with each of the first conductive member 11 and the second conductive member 12 of the contact portion 10. In this case, the distance from the end portion 301 of the laminated body 30 to the first conductive member 11 and the second conductive member 12 is from "L" to "0".

よって、セル３１が膨張した場合、接触部１０の第１導電部材１１及び第２導電部材１２は、絶縁部材１３によって連結されているとともに、導電性のセルケース３２によって連結されている。このため、第１導電部材１１に流れている電流は、セルケース３２を介して、第２導電部材１２に向かって流れることができる。すなわち、セルケース３２によって、第１導電部材１１及び第２導電部材１２は導通されている。 Therefore, when the cell 31 expands, the first conductive member 11 and the second conductive member 12 of the contact portion 10 are connected by the insulating member 13 and are connected by the conductive cell case 32. Therefore, the current flowing through the first conductive member 11 can flow toward the second conductive member 12 via the cell case 32. That is, the first conductive member 11 and the second conductive member 12 are conducted by the cell case 32.

その結果、検出部２０は、第１導電部材１１と第２導電部材１２との間の導通を検出することができる。言い換えれば、検出部２０によって、第１導電部材１１と第２導電部材１２との間の導通を検出した場合、電池パック３のセル３１は膨張している。 As a result, the detection unit 20 can detect the continuity between the first conductive member 11 and the second conductive member 12. In other words, when the detection unit 20 detects the conduction between the first conductive member 11 and the second conductive member 12, the cell 31 of the battery pack 3 is expanded.

（効果）
このように、本実施形態に係るセル膨張検出装置２は、セル膨張の判断基準として、積層体３０の端部３０１のセル３１のセルケース３２と第１導電部材１１及び第２導電部材１２との接触による第１導電部材１１と第２導電部材１２との間の導通の有無を利用して電池パック３のセル３１の膨張の有無を検出している。すなわち、セル膨張検出装置２は、導電性のセルケース３２と第１導電部材１１及び第２導電部材１２との接触の有無を判断することで、電池パックのセル膨張の有無を検出することができる。このような判断基準によって、セル膨張検出装置２の測定精度を安定かつ良好に維持することができる。そして、セル膨張検出装置２の検出の正確性は、セル膨張検出装置２自体の測定精度による影響を受けることがほぼない。このため、本実施形態に係るセル膨張検出装置２は、測定精度の影響による誤判断の発生を抑制し、正確に電池パック３のセル３３１の膨張を検出することができる。 (effect)
As described above, the cell expansion detection device 2 according to the present embodiment has the cell case 32, the first conductive member 11 and the second conductive member 12 of the cell 31 of the end portion 301 of the laminated body 30 as a criterion for determining the cell expansion. The presence or absence of expansion of the cell 31 of the battery pack 3 is detected by utilizing the presence or absence of continuity between the first conductive member 11 and the second conductive member 12 due to the contact of the battery pack 3. That is, the cell expansion detection device 2 can detect the presence or absence of cell expansion of the battery pack by determining the presence or absence of contact between the conductive cell case 32 and the first conductive member 11 and the second conductive member 12. can. Based on such a determination criterion, the measurement accuracy of the cell expansion detection device 2 can be maintained stably and satisfactorily. The detection accuracy of the cell expansion detection device 2 is hardly affected by the measurement accuracy of the cell expansion detection device 2 itself. Therefore, the cell expansion detection device 2 according to the present embodiment can suppress the occurrence of erroneous determination due to the influence of the measurement accuracy and can accurately detect the expansion of the cell 331 of the battery pack 3.

また、上述したように、本実施形態に係るセル膨張検出装置２は、簡易な構成を採用している。このため、複雑な構成を有するセル膨張検出装置に比べて、各構成の不具合による測定精度への影響を抑制することができるとともに、装置の製造コストを軽減することができる。 Further, as described above, the cell expansion detection device 2 according to the present embodiment adopts a simple configuration. Therefore, as compared with the cell expansion detection device having a complicated configuration, it is possible to suppress the influence on the measurement accuracy due to the defect of each configuration and reduce the manufacturing cost of the device.

なお、駆動用バッテリ等の電池パックのセル膨張を検出する場合、セル各々の膨張を検知するのが一般的であるが、本実施形態に係るセル膨張検出装置２は、電池パックの経年劣化によるセル膨張を検出することを目的としている。このため、本実施形態に係るセル膨張検出装置２は、セル各々の膨張を検知するほどの精度を担保する必要がない。よって、本実施形態に係るセル膨張検出装置２は、積層体単位の膨張を検知できるような簡易な構成を採用することができる。 When detecting the cell expansion of a battery pack such as a drive battery, it is common to detect the expansion of each cell, but the cell expansion detecting device 2 according to the present embodiment is due to aged deterioration of the battery pack. The purpose is to detect cell expansion. Therefore, the cell expansion detection device 2 according to the present embodiment does not need to ensure the accuracy enough to detect the expansion of each cell. Therefore, the cell expansion detection device 2 according to the present embodiment can adopt a simple configuration that can detect the expansion of each laminated body.

従って、本実施形態に係るセル膨張検出装置２は、簡易な構成を用いて、測定精度の影響による誤判断の発生を抑制し、正確に電池パックのセル膨張を検出することを実現している。 Therefore, the cell expansion detection device 2 according to the present embodiment has realized that the cell expansion of the battery pack can be accurately detected by suppressing the occurrence of erroneous determination due to the influence of the measurement accuracy by using a simple configuration. ..

以上説明した実施形態は、本発明の理解を容易にするためのものであり、本発明を限定して解釈するためのものではない。実施形態が備える各要素並びにその配置、材料、条件、形状及びサイズ等は、例示したものに限定されるわけではなく適宜変更することができる。また、異なる実施形態で示した構成同士を部分的に置換し又は組み合わせることが可能である。 The embodiments described above are for facilitating the understanding of the present invention, and are not for limiting the interpretation of the present invention. Each element included in the embodiment and its arrangement, material, condition, shape, size, and the like are not limited to those exemplified, and can be appropriately changed. Further, it is possible to partially replace or combine the configurations shown in different embodiments.

１…電池パックユニット、２…セル膨張検出装置、３…電池パック、１０…接触部、１１…第１導電部材、１２…第２導電部材、１３…絶縁部材、２０…検出部、３０…積層体、３１…セル、４０…電池ケース、４１…内部空間、３０１，３０２…端部 1 ... Battery pack unit, 2 ... Cell expansion detection device, 3 ... Battery pack, 10 ... Contact part, 11 ... First conductive member, 12 ... Second conductive member, 13 ... Insulation member, 20 ... Detection part, 30 ... Laminating Body, 31 ... cell, 40 ... battery case, 41 ... internal space, 301, 302 ... end

Claims (1)

複数のセルが積層され、積層方向にて導電性の端部を有する積層体と、前記積層体を収容する電池ケースとを備える電池パックに用いられ、前記セルの膨張を検出するための電池パックのセル膨張検出装置であって、
第１導電部材と、前記第１導電部材と離間するように配置された第２導電部材と、前記第１導電部材及び前記第２導電部材を連結する絶縁部材とを有する接触部と、
前記第１導電部材と前記第２導電部材との間の導通の有無を検出することで、前記セルの膨張の有無を検出する検出部と、を備え、
前記接触部は、前記電池ケースの内部の所定位置に配置されており、
前記所定位置は、前記セルが膨張していないときは前記接触部を前記積層体の前記端部から離間させる位置であるとともに、前記セルが前記積層方向に所定以上膨張したときは前記接触部の前記第１導電部材及び前記第２導電部材のそれぞれを前記積層体の前記端部と接触させる位置である、
電池パックのセル膨張検出装置。 A battery pack used for a battery pack in which a plurality of cells are laminated and has a laminated body having a conductive end in the stacking direction and a battery case for accommodating the laminated body, and for detecting expansion of the cells. It is a cell expansion detector of
A contact portion having a first conductive member, a second conductive member arranged so as to be separated from the first conductive member, and an insulating member connecting the first conductive member and the second conductive member.
A detection unit for detecting the presence or absence of expansion of the cell by detecting the presence or absence of continuity between the first conductive member and the second conductive member is provided.
The contact portion is arranged at a predetermined position inside the battery case.
The predetermined position is a position where the contact portion is separated from the end portion of the laminated body when the cell is not expanded, and when the cell expands by a predetermined value or more in the stacking direction, the contact portion is formed. It is a position where each of the first conductive member and the second conductive member is brought into contact with the end portion of the laminated body.
Battery pack cell expansion detector.
JP2020130131A 2020-07-31 2020-07-31 Battery pack cell expansion detection device Pending JP2022026588A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020130131A JP2022026588A (en) 2020-07-31 2020-07-31 Battery pack cell expansion detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2020130131A JP2022026588A (en) 2020-07-31 2020-07-31 Battery pack cell expansion detection device

Publications (1)

Publication Number Publication Date
JP2022026588A true JP2022026588A (en) 2022-02-10

Family

ID=80263644

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2020130131A Pending JP2022026588A (en) 2020-07-31 2020-07-31 Battery pack cell expansion detection device

Country Status (1)

Country Link
JP (1) JP2022026588A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023219040A1 (en) * 2022-05-10 2023-11-16 株式会社村田製作所 Electronic device
CN117977033A (en) * 2024-03-29 2024-05-03 宁德时代新能源科技股份有限公司 Battery box, battery management method and electricity utilization device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023219040A1 (en) * 2022-05-10 2023-11-16 株式会社村田製作所 Electronic device
CN117977033A (en) * 2024-03-29 2024-05-03 宁德时代新能源科技股份有限公司 Battery box, battery management method and electricity utilization device

Similar Documents

Publication Publication Date Title
KR101334534B1 (en) Battery system
JP2022026588A (en) Battery pack cell expansion detection device
JP2006269345A (en) Overvoltage detecting method, device, and battery pack
CN110168390B (en) Apparatus and method for inspecting secondary battery defects
JPWO2011101942A1 (en) Battery module
JP6399021B2 (en) Secondary battery and battery pack
JP2014127341A (en) Battery state detection system and battery state detection method
JP5134937B2 (en) Battery monitoring device, sealed battery, and sealed assembled battery
JP2014192104A (en) Battery
KR20140069142A (en) Method to monitor safe operation of an ultracapacitor
JP2008251437A (en) Power supply device and expansion detection method of electrochemical element
JP2015005359A (en) Lithium ion battery and malfunction detection method of the same
JP5693302B2 (en) Battery system
KR101920991B1 (en) Storage cell, exterior film and storage module
JP6248751B2 (en) Power storage device inspection method
JP2009231060A (en) Battery pack
KR102109224B1 (en) System and method for monitoring battery case
JP6907583B2 (en) Storage battery
JP4557829B2 (en) Inspection method of lead acid battery
JP5348685B2 (en) Lithium ion battery pack
JP2012033328A (en) Battery deterioration detection device
US20120052343A1 (en) Sealed secondary battery
JP2007250194A (en) Short circuit detector for battery pack
KR20220046135A (en) Pouch type secondary battery and battery module including the same
KR101875269B1 (en) Three electrode cell fabrication kit