JP2003331803A - Battery pack - Google Patents

Battery pack

Info

Publication number
JP2003331803A
JP2003331803A JP2002134467A JP2002134467A JP2003331803A JP 2003331803 A JP2003331803 A JP 2003331803A JP 2002134467 A JP2002134467 A JP 2002134467A JP 2002134467 A JP2002134467 A JP 2002134467A JP 2003331803 A JP2003331803 A JP 2003331803A
Authority
JP
Japan
Prior art keywords
battery
batteries
battery pack
partition wall
plurality
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.)
Granted
Application number
JP2002134467A
Other languages
Japanese (ja)
Other versions
JP3662895B2 (en
Inventor
Tadashi Watanabe
正 渡辺
Original Assignee
Matsushita Electric Ind Co Ltd
松下電器産業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Ind Co Ltd, 松下電器産業株式会社 filed Critical Matsushita Electric Ind Co Ltd
Priority to JP2002134467A priority Critical patent/JP3662895B2/en
Publication of JP2003331803A publication Critical patent/JP2003331803A/en
Application granted granted Critical
Publication of JP3662895B2 publication Critical patent/JP3662895B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage
    • Y02E60/12Battery technologies with an indirect contribution to GHG emissions mitigation

Abstract

(57) [Summary] (with correction) [PROBLEMS] To provide a battery pack configured so that heat generation of a specific battery does not affect other batteries. SOLUTION: A plurality of secondary batteries 1a to 1f are respectively housed in battery housing spaces partitioned by partition walls 4. Since each of the plurality of batteries is separated by the partition wall, when heat is generated in a specific battery, the heat is suppressed from being transferred to an adjacent battery. When the partition wall 4 is formed in a double structure having a gap, the heat insulating effect is improved. Also,
By forming a notch in the partition and holding the wiring member in the notch, the wiring between the battery housing spaces can be reliably performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is constructed so that when a plurality of batteries are housed in a case to constitute a battery pack, and when an abnormality occurs in the battery, it does not affect other batteries. The present invention relates to such a battery pack.

[0002]

2. Description of the Related Art A battery pack is constructed by connecting a plurality of batteries in series and / or in parallel in order to meet the operating power required by an applied device. Since the main application target of the battery pack is a portable electronic device, miniaturization is required. For example, as shown in FIG. 8, the plurality of secondary batteries 1a to 1f are arranged in the case body 10 in a dense state. In the case of this battery pack, six secondary batteries 1a to 1f are connected in two parallel and three series, and the secondary batteries (1a, 1a) are connected in parallel.
Since b), (1c, 1d), and (1e, 1f) can be arranged in contact with each other, the size of the battery pack in the lateral direction can be reduced and the size can be reduced.

Further, FIG. 9 shows nine secondary batteries 1a to 1i.
3 shows a configuration example of a battery pack that is connected in 3 parallel 3 series and housed in the case main body 26. Secondary batteries (1a to 1c), (1d to 1f), and (1g to 1i) connected in parallel are Insulating plates 2 are placed close to each other and are connected in series.
8 are arranged for insulation. The serial / parallel connection is achieved by connecting plates 29a arranged at both ends of the plurality of secondary batteries 1a to 1i,
29b is connected to the positive electrode or the negative electrode of each of the secondary batteries 1a to 1i. The connection plates 29a and 29b are formed by covering both surfaces of the metal thin plate 30 with the insulating sheets 31.
The metal thin plate 30 is exposed to the outside from the joining window 33 from which the insulating sheet 31 at the portion joined to a to 1i is removed.
Then, the metal thin plate 30 is spot-welded to each of the secondary batteries 1a to 1i.

One end of each of connection plates 29a and 29b in which the secondary batteries 1a to 1i are connected in series and parallel is connected to a circuit board 32.
The external connection terminals 34 fixed to the circuit board 32 serve for external connection. A cover plate 27 is joined and sealed to the opening of the case body 26 accommodating the plurality of secondary batteries 1a to 1i.

[0005]

When a plurality of batteries are densely arranged to form a battery pack as in the above-mentioned conventional structure and a specific battery generates heat due to variations or abnormalities in battery characteristics, the battery is brought close to the battery. Alternatively, the temperature of the batteries in contact with each other increases due to heat conduction, and there is a problem that a plurality of batteries are affected by heat. Further, when a specific battery is in an abnormal state that causes ignition, the adjacent batteries are also damaged.

In addition, when a short circuit occurs in one battery of a plurality of batteries connected in parallel, a short circuit current also flows in the other batteries connected in parallel, so that the plurality of batteries overheat and the heat generated from each other is synergistic. As the temperature rises violently due to the effect, there is a risk of falling into a serious accident such as ignition.

[0007] An object of the present invention is to provide a battery pack having a structure for suppressing the influence of heat generation when a battery malfunctions.

[0008]

According to the present invention for achieving the above object, a plurality of batteries are housed in a case main body formed in a half shell, and a lid is joined to the case main body to form an opening. A sealed battery pack, characterized in that a plurality of batteries are individually housed in a battery housing space separated by a partition formed in the case body,
Since the plurality of batteries are separated by the partition walls, when heat is generated in a specific battery, the heat transfer to the adjacent battery is suppressed, and the heat generation of the specific battery affects other batteries. Therefore, it is possible to prevent the plurality of batteries from being affected by heat.

In the above structure, when the partition wall is formed in a double structure having a gap, the heat insulation effect is improved and the heat effect is effectively shielded. If a wiring member that connects a plurality of batteries is housed in the gap of the double structure, the gap can be effectively used.

Further, by forming a cutout portion in the partition wall and holding the wiring member extending over the adjacent battery storage spaces in the cutout portion, the wiring between the battery storage spaces partitioned by the partition wall is surely performed. You can

Further, by disposing the plurality of batteries connected in parallel so as not to be adjacent to each other, even if a short-circuit current flows through the plurality of batteries connected in parallel at the time of occurrence of a short circuit and the plurality of batteries simultaneously generate heat, Due to the dispersed arrangement, the heat generation is not concentrated in one place, and it is possible to prevent the ignition due to the heat concentration.

Further, since the strength of the pack case is improved by joining one end of the partition wall to the lid body when joining the lid body, the required strength can be obtained even if the pack case is formed thin.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention.
The embodiments described below are examples of embodying the present invention and do not limit the technical scope of the present invention.

FIG. 1 is an exploded view of the structure of the battery pack according to the first embodiment, which shows six secondary batteries 1a-1.
f is connected in 2 parallel 3 series by connecting members 2a and 2b and accommodated in the case main body 3, and a lid not shown is joined to the opening of the case main body 3 to seal the opening of the case main body 3. Is configured.

A partition wall 4 is formed in the case body 3, and the secondary batteries 1a to 1f are housed in a battery housing space partitioned by the partition wall 4. A notch 4a for passing the connecting members 2a and 2b into the adjacent battery accommodating spaces is formed at a required portion of the partition wall 4. A circuit board (not shown) and external connection terminals are arranged in the board housing space 5 formed in the case body 3. One end of a lead wire (not shown) is connected to each of the connection members 2a and 2b, and the other end of the lead wire is connected. Are connected to the circuit board. The circuit board constitutes a battery protection circuit and the like, and the circuit board is connected to each of the secondary batteries 1a to 1 by connecting lead wires.
The voltage of f is detected to protect the secondary batteries 1a to 1f from overcharge, overdischarge, and overcurrent.

In order to connect the lead wires connected to the connecting members 2a and 2b to the substrate accommodating space 5, it is necessary to pass through the partition wall 4, and the partition wall 4 through which the lead wire passes is shown in FIG.
As shown in, the lead holding notch 6 can be formed, and the lead wire is held on the partition wall 4 by pressing the lead wire 7 into the lead holding notch 6.

As described above, a plurality of secondary batteries 1a ...
By accommodating 1f in the battery accommodating spaces separated by the partition walls 4, when heat generation or ignition occurs in a specific battery due to variation or abnormality in the battery characteristics, it is suppressed that the specific battery extends to other batteries. It is possible to prevent damage to other batteries due to abnormality of one battery. In particular, when a short circuit occurs, a short-circuit current flows through multiple batteries connected in parallel to generate heat, and if multiple batteries generate heat at the same time, they may affect each other, resulting in a severe temperature rise and ignition. However, the presence of the partition wall 4 between the batteries connected in parallel suppresses the thermal influence of each other and prevents an abnormal temperature rise.

As shown in FIG. 3, the partition wall 4 can be formed on the partition walls 4 and 4 having a double structure, and the effect of blocking the thermal influence between the batteries can be improved. Further, it can be used as a space for accommodating the lead wire 7 in the gap formed between the double partitions 4, 4.

The opening of the case body 3 accommodating the plurality of secondary batteries 1a to 1f is sealed by joining a lid, but when the upper end of the partition wall 4 is joined to the lid when joining the lids, Since the bottom surface of the case body is joined to the lid body at a plurality of portions by the partition wall 4, the strength of the battery pack is significantly improved. Therefore, the required strength can be ensured even if the outer shell of the case body 3 is made thin, and the amount of the resin material for molding the case body 3 can be reduced to reduce the cost. It is also possible to reduce the size of the battery pack.

As shown in FIG. 4, when the case body 3 and the lid 9 are joined to each other by ultrasonic joining, the partition 4 and the lid are joined together by a protrusion for ultrasonic joining on the upper end of the partition 4. 4b
It is preferable that the projection 4b is welded to the lid 9 by ultrasonic vibration. Further, as shown in FIG. 5, ribs 11 and 1 formed on the lid 9 are provided at the upper end of the partition wall 4.
Applying a fitting structure in which the ribs 11 are fitted between the ribs 1, or an adhesive structure in which the upper end of the partition wall 4 is bonded by the adhesive filled between the ribs 11 formed in the lid 9 as shown in FIG. You can also

FIG. 7 shows the structure of the battery pack according to the second embodiment. Nine secondary batteries 1a to 1i are connected in 3 parallel 3 series to form a case body 16 together with a circuit board 15.
It is housed inside, and the opening of the case body 16 is configured to be joined and sealed with the lid 17. With this configuration,
Secondary batteries (1a to 1c) and (1d to 1) connected in parallel
f) and (1g to 1i) are arranged in parallel so as not to be adjacent to each other, and each of the secondary batteries 1a to 1a of the connection plates 18a and 18b.
A serial-parallel connection is made by joining to 1i.

Insulating sheets 21 are attached to both sides of a thin metal plate 20 formed in a predetermined wiring pattern in the connecting plate 18a, and the connecting portions of the thin metal plate 20 to the secondary batteries 1a to 1i are insulated sheets 21 on both sides. Is removed to form the bonding window 24. The bonding plate 18b is also configured in the same manner, and the insulating sheets 23 are attached to both surfaces of the metal thin plate 22 formed in a predetermined wiring pattern, and the bonding portion of the metal thin plate 22 to the secondary batteries 1a to 1i is an insulating sheet on both surfaces. Bonding window 2 with 23 removed
4 are formed.

The plurality of secondary batteries 1a to 1i are arranged in parallel on a jig with their arrangement directions regulated, and the connection plates 18a and 18b are spot-welded (series welding) to the positive and negative electrodes on both ends thereof. ) Is joined. For the joining, a pair of welding electrodes are pressed and brought into contact with the metal thin plates 20 and 22 exposed to the outside through the joining windows 24 formed in the insulating sheets 21 and 23, and a welding current is passed between the welding electrodes so that the metal thin plates 20 and 22 are joined.
Is joined to the positive electrode or the negative electrode of each of the secondary batteries 1a to 1i. Each of the secondary batteries 1a to 1i has a connection plate 18a and 18b joined together,
Circuit board 15 to which one ends of connection plates 18a and 18b are connected
A wiring pattern of 3 parallel 3 series can be obtained.

A plurality of secondary batteries 1a-1 connected in series and parallel
i is housed in the case body 16 as shown in FIG. 7. A plurality of partition walls 19 are formed in the case body 16, and the secondary batteries 1 a to 1 i are housed in the battery housing space partitioned by the partition walls 19. Since the secondary batteries 1a to 1i are separated from each other by the partition wall 19 as described above, when heat generation or ignition occurs in a specific battery due to variation or abnormality in battery characteristics, it may extend to other batteries. It is suppressed, and it is possible to prevent damage to other batteries due to abnormality of one battery. In particular, when a short circuit occurs, a short-circuit current flows through multiple batteries connected in parallel to generate heat. If multiple batteries generate heat at the same time, they may affect each other, resulting in a severe temperature rise and ignition. However, since the partition wall 19 exists between the batteries connected in parallel, and the partition walls 19 are arranged at positions further apart from each other, thermal influences on each other are suppressed, and an abnormal temperature rise can be prevented.

[0025]

As described above, according to the present invention, when a plurality of batteries are separated by partition walls, when heat is generated in a specific battery, the heat is transferred to the adjacent battery. It is suppressed that the heat generated by a specific battery affects other batteries and the plurality of batteries are affected by heat. Further, since the plurality of batteries connected in parallel are distributed and arranged, even if the plurality of batteries connected in parallel generate heat at the same time when a short circuit occurs, the heat is concentrated in one place by being arranged in a distributed manner. It is possible to prevent ignition due to heat concentration.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a configuration of a battery pack according to a first embodiment.

FIG. 2 is a cross-sectional view showing the structure of a partition formed in a double structure.

FIG. 3 is a cross-sectional view showing a lead holding notch formed in a partition wall.

FIG. 4 is a cross-sectional view showing a configuration in which a partition wall is ultrasonically bonded to a lid.

FIG. 5 is a cross-sectional view showing a configuration in which a partition wall is fitted and joined to a lid body.

FIG. 6 is a cross-sectional view showing a configuration in which a partition wall is adhesively bonded to a lid.

FIG. 7A is a plan view showing a configuration of a battery pack according to a second embodiment, and FIGS. 7B and 7C are side views.

FIG. 8 is a perspective view showing a configuration of a battery pack according to a conventional technique.

FIG. 9 shows a structure of a battery pack according to the prior art (a).
Is a plan view, and (b) and (c) are side views.

[Explanation of symbols]

1a to 1i secondary battery 2a, 2b connection member 3,16 Case body 4,19 bulkhead 4a Notch 6 Lead holding notch 7 lead wire

Claims (6)

[Claims]
1. A battery pack in which a plurality of batteries are housed in a case body formed in a half-shell, and a lid is joined to an opening of the case body to seal the case body. The battery pack is characterized in that each battery is individually housed in a battery housing space separated by a partition formed in the case body.
2. The battery pack according to claim 1, wherein the partition wall is formed in a double structure having a gap.
3. The battery pack according to claim 2, wherein a wiring member is housed in the gap.
4. The battery pack according to claim 1, wherein a notch is formed in the partition wall, and the wiring member that straddles an adjacent battery housing space is held by the notch.
5. The battery pack according to claim 1, wherein a plurality of batteries connected in parallel are arranged so as not to be adjacent to each other.
6. The battery pack according to claim 1, wherein one end of the partition wall is joined to the lid when the lid is joined.
JP2002134467A 2002-05-09 2002-05-09 Battery pack Expired - Fee Related JP3662895B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002134467A JP3662895B2 (en) 2002-05-09 2002-05-09 Battery pack

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002134467A JP3662895B2 (en) 2002-05-09 2002-05-09 Battery pack

Publications (2)

Publication Number Publication Date
JP2003331803A true JP2003331803A (en) 2003-11-21
JP3662895B2 JP3662895B2 (en) 2005-06-22

Family

ID=29697105

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002134467A Expired - Fee Related JP3662895B2 (en) 2002-05-09 2002-05-09 Battery pack

Country Status (1)

Country Link
JP (1) JP3662895B2 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008034296A (en) * 2006-07-31 2008-02-14 Sanyo Electric Co Ltd Battery pack
JP2008140629A (en) * 2006-11-30 2008-06-19 Sanyo Electric Co Ltd Battery pack
JP2008192570A (en) * 2007-02-07 2008-08-21 Sanyo Electric Co Ltd Battery pack
JP2008218210A (en) * 2007-03-05 2008-09-18 Lenovo Singapore Pte Ltd Battery pack and portable electronic device
US20090061294A1 (en) * 2007-08-30 2009-03-05 Samsung Sdi Co., Ltd Battery case and battery pack using the same
WO2009101782A1 (en) * 2008-02-12 2009-08-20 Panasonic Corporation Battery housing tray and assembled-battery housing tray using the same
JP2009252567A (en) * 2008-04-08 2009-10-29 Nissei Kogyo Yugenkoshi Battery pack
WO2010143408A1 (en) 2009-06-08 2010-12-16 パナソニック株式会社 Battery pack
KR101066235B1 (en) 2011-05-04 2011-09-20 김성태 Polymer battery tray
JP2014197517A (en) * 2013-03-29 2014-10-16 株式会社Gsユアサ Power storage device
WO2015154995A1 (en) * 2014-04-10 2015-10-15 Robert Bosch Gmbh Energy storage unit comprising a plurality of energy storage sub-units, and an energy storage system comprising a plurality of energy storage units
WO2020036331A1 (en) * 2018-08-14 2020-02-20 주식회사 엘지화학 Battery pack comprising battery frame

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008034296A (en) * 2006-07-31 2008-02-14 Sanyo Electric Co Ltd Battery pack
JP2008140629A (en) * 2006-11-30 2008-06-19 Sanyo Electric Co Ltd Battery pack
JP2008192570A (en) * 2007-02-07 2008-08-21 Sanyo Electric Co Ltd Battery pack
US8097356B2 (en) 2007-03-05 2012-01-17 Lenovo (Singapore) Pte. Ltd. Battery pack
JP2008218210A (en) * 2007-03-05 2008-09-18 Lenovo Singapore Pte Ltd Battery pack and portable electronic device
US7887941B2 (en) 2007-03-05 2011-02-15 Lenovo (Singapore) Pte. Ltd. Battery pack
US20090061294A1 (en) * 2007-08-30 2009-03-05 Samsung Sdi Co., Ltd Battery case and battery pack using the same
JP2009059681A (en) * 2007-08-30 2009-03-19 Samsung Sdi Co Ltd Battery pack and battery case
WO2009101782A1 (en) * 2008-02-12 2009-08-20 Panasonic Corporation Battery housing tray and assembled-battery housing tray using the same
JP2009252567A (en) * 2008-04-08 2009-10-29 Nissei Kogyo Yugenkoshi Battery pack
US8592067B2 (en) 2009-06-08 2013-11-26 Panasonic Corporation Battery pack having a heat insulating layer
WO2010143408A1 (en) 2009-06-08 2010-12-16 パナソニック株式会社 Battery pack
KR101066235B1 (en) 2011-05-04 2011-09-20 김성태 Polymer battery tray
JP2014197517A (en) * 2013-03-29 2014-10-16 株式会社Gsユアサ Power storage device
WO2015154995A1 (en) * 2014-04-10 2015-10-15 Robert Bosch Gmbh Energy storage unit comprising a plurality of energy storage sub-units, and an energy storage system comprising a plurality of energy storage units
CN106415881A (en) * 2014-04-10 2017-02-15 罗伯特·博世有限公司 Energy storage unit comprising a plurality of energy storage sub-units, and an energy storage system comprising a plurality of energy storage units
WO2020036331A1 (en) * 2018-08-14 2020-02-20 주식회사 엘지화학 Battery pack comprising battery frame

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Publication number Publication date
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