JP6840397B2 - Power storage device - Google Patents
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- JP6840397B2 JP6840397B2 JP2018523235A JP2018523235A JP6840397B2 JP 6840397 B2 JP6840397 B2 JP 6840397B2 JP 2018523235 A JP2018523235 A JP 2018523235A JP 2018523235 A JP2018523235 A JP 2018523235A JP 6840397 B2 JP6840397 B2 JP 6840397B2
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- 238000003860 storage Methods 0.000 title claims description 57
- 230000001681 protective effect Effects 0.000 claims description 103
- 238000012544 monitoring process Methods 0.000 claims description 76
- 230000000149 penetrating effect Effects 0.000 claims description 39
- 238000005192 partition Methods 0.000 claims description 12
- 230000005494 condensation Effects 0.000 description 9
- 238000009833 condensation Methods 0.000 description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000011255 nonaqueous electrolyte Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- 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
-
- 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
- H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
- H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
- H01M50/227—Organic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/271—Lids or covers for the racks or secondary casings
-
- 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
- H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
-
- 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
- H01M50/298—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the wiring of battery packs
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Battery Mounting, Suspending (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Description
本発明は、蓄電装置に関する。 The present invention relates to a power storage device.
近年、電池は、様々な用途に用いられ、特に大容量の二次電池は、電気自動車用電源や電力貯蔵などの用途に用いられている。
二次電池を単電池で使用すると、機器が必要とする電圧よりも二次電池の電圧が低い場合がある。このような場合、複数の二次電池を直列に接続し供給電圧を所望の電圧まで高くする必要がある。また、単電池では機器が必要とする電気量を十分に供給できない場合がある。このような場合、複数の二次電池を並列に接続し供給電気量を所望の量まで大きくする必要がある。In recent years, batteries have been used for various purposes, and in particular, large-capacity secondary batteries have been used for applications such as power sources for electric vehicles and power storage.
When a secondary battery is used as a single battery, the voltage of the secondary battery may be lower than the voltage required by the device. In such a case, it is necessary to connect a plurality of secondary batteries in series to raise the supply voltage to a desired voltage. In addition, a single battery may not be able to supply a sufficient amount of electricity required by the device. In such a case, it is necessary to connect a plurality of secondary batteries in parallel to increase the amount of supplied electricity to a desired amount.
このため、直列又は並列に接続した複数の二次電池を筐体に収容した蓄電装置から機器に電力を供給している。また、この複数の二次電池を監視する電池監視ユニット（BMU）を内蔵した蓄電装置が知られている（例えば、特許文献１参照）。BMUは、通常、各電池の電圧などを測定し、充・放電時の過充電、過放電を検出する。また、BMUは、各電池の電圧バランスを維持する機能も有することができる。 Therefore, power is supplied to the device from the power storage device in which a plurality of secondary batteries connected in series or in parallel are housed in the housing. Further, a power storage device having a built-in battery monitoring unit (BMU) for monitoring the plurality of secondary batteries is known (see, for example, Patent Document 1). The BMU usually measures the voltage of each battery and detects overcharging and overdischarging during charging and discharging. The BMU can also have the function of maintaining the voltage balance of each battery.
BMUにより複数の二次電池を監視するためには、BMUと各二次電池のプラス端子およびマイナス端子とを電気的に接続する必要がある。このため、BMUは多くの配線と接続する必要があり、BMUの周りに複数の端子部材が設けられる。また、蓄電装置を小型化するため、複数の端子部材を並べて配置する必要がある。複数の端子部材を並べて配置すると、表面漏れ電流が流れやすくなり端子部材間の短絡が生じる場合がある。また、BMUを収容した筐体内において結露が生じると、表面抵抗が小さくなり表面漏れ電流が流れやすくなり短絡が生じやすくなる。
本発明は、このような事情に鑑みてなされたものであり、並べて配置した２つの端子部材の間の沿面距離を長くすることができ、表面漏れ電流を遮断することができる蓄電装置を提供する。In order for the BMU to monitor multiple secondary batteries, it is necessary to electrically connect the BMU to the positive and negative terminals of each secondary battery. Therefore, the BMU needs to be connected to many wires, and a plurality of terminal members are provided around the BMU. Further, in order to reduce the size of the power storage device, it is necessary to arrange a plurality of terminal members side by side. When a plurality of terminal members are arranged side by side, a surface leakage current tends to flow and a short circuit may occur between the terminal members. Further, when dew condensation occurs in the housing containing the BMU, the surface resistance becomes small, the surface leakage current easily flows, and a short circuit easily occurs.
The present invention has been made in view of such circumstances, and provides a power storage device capable of increasing the creepage distance between two terminal members arranged side by side and interrupting a surface leakage current. ..
本発明は、複数の二次電池と、複数の二次電池を監視する電池監視部と、前記電池監視部を収容する保護ケースと、前記保護ケースに並べて取り付けられた板状の第１及び第２端子部材と、複数の二次電池、前記電池監視部及び前記保護ケースを収容する筐体とを備え、前記電池監視部は、第１又は第２端子部材を介して前記二次電池の過充電を検出するように設けられ、第１端子部材は、前記保護ケースの内部に配置された第１内部端子部と、前記保護ケースの外部に配置された第１外部端子部と、前記保護ケースを貫通する第１貫通部と、第１貫通部と第１外部端子部との間に設けられた第１導電部とを備え、第２端子部材は、前記保護ケースの内部に配置された第２内部端子部と、前記保護ケースの外部に配置された第２外部端子部と、前記保護ケースを貫通する第２貫通部と、第２貫通部と第２外部端子部との間に設けられた第２導電部とを備え、第１導電部の幅は、第１外部端子部の幅よりも狭く、第２導電部の幅は、第２外部端子部の幅よりも狭いことを特徴とする蓄電装置を提供する。 The present invention includes a plurality of secondary batteries, a battery monitoring unit that monitors the plurality of secondary batteries, a protective case that houses the battery monitoring unit, and plate-shaped first and first plates that are attached side by side to the protective case. A two-terminal member, a plurality of secondary batteries, a battery monitoring unit, and a housing for accommodating the protective case are provided, and the battery monitoring unit is used for the secondary battery via a first or second terminal member. The first terminal member is provided so as to detect charging, and includes a first internal terminal portion arranged inside the protective case, a first external terminal portion arranged outside the protective case, and the protective case. The first penetrating portion and the first conductive portion provided between the first penetrating portion and the first external terminal portion are provided, and the second terminal member is arranged inside the protective case. 2 Provided between the internal terminal portion, the second external terminal portion arranged outside the protective case, the second penetrating portion penetrating the protective case, and the second penetrating portion and the second external terminal portion. The width of the first conductive portion is narrower than the width of the first external terminal portion, and the width of the second conductive portion is narrower than the width of the second external terminal portion. Provide a power storage device.
本発明の蓄電装置は、複数の二次電池と、複数の二次電池を監視する電池監視部と、複数の二次電池及び前記電池監視部を収容する筐体とを備えるため、電池監視部により複数の二次電池を監視しながら充放電することができ、蓄電装置の安全性を向上させることができる。また、二次電池と電池監視部とを筐体内で電気的に接続することができ、蓄電装置を小型化することや部品数を低減することができる。
本発明の蓄電装置は電池監視部を内部に収容し筐体内に収容される保護ケースを備えるため、筐体内の二次電池を収容するスペースと電池監視部を収容するスペースとを分離することができる。このため、二次電池の液漏れが生じた場合でも、漏れ出た電解液が電池監視部を収容した保護ケース内に浸入することを抑制することができ、電池監視部が損傷することを抑制することができる。
本発明の蓄電装置に含まれる電池監視部は、保護ケースに取り付けられた第１及び第２端子部材を介して二次電池の過充電を検出するように設けられる。このため、過充電が生じると二次電池の充電を中止することが可能になり、蓄電装置の安全性を向上させることができる。Since the power storage device of the present invention includes a plurality of secondary batteries, a battery monitoring unit for monitoring the plurality of secondary batteries, and a housing for accommodating the plurality of secondary batteries and the battery monitoring unit, the battery monitoring unit Therefore, it is possible to charge and discharge while monitoring a plurality of secondary batteries, and it is possible to improve the safety of the power storage device. Further, the secondary battery and the battery monitoring unit can be electrically connected in the housing, and the power storage device can be miniaturized and the number of parts can be reduced.
Since the power storage device of the present invention includes a protective case in which the battery monitoring unit is housed and is housed in the housing, the space for accommodating the secondary battery in the housing and the space for accommodating the battery monitoring unit can be separated. it can. Therefore, even if the secondary battery leaks, it is possible to prevent the leaked electrolyte from entering the protective case containing the battery monitoring unit, and it is possible to prevent the battery monitoring unit from being damaged. can do.
The battery monitoring unit included in the power storage device of the present invention is provided so as to detect overcharging of the secondary battery via the first and second terminal members attached to the protective case. Therefore, when overcharging occurs, charging of the secondary battery can be stopped, and the safety of the power storage device can be improved.
保護ケースに取り付けられた第１端子部材は、保護ケースの内部に配置された第１内部端子部と、保護ケースの外部に配置された第１外部端子部と、保護ケースを貫通する第１貫通部と、第１貫通部と第１外部端子部との間に設けられた第１導電部とを備える。また、保護ケースに取り付けられた第２端子部材は、保護ケースの内部に配置された第２内部端子部と、保護ケースの外部に配置された第２外部端子部と、保護ケースを貫通する第２貫通部と、第２貫通部と第２外部端子部との間に設けられた第２導電部とを備える。このため、複数の端子部材で保護ケースに収容した電池監視部と、保護ケースの外部に配置した二次電池とを電気的に接続することができ、電池監視部により二次電池の過充電を検出することが可能になる。
第１端子部材及び第２端子部材は、板状であり、保護ケースに並べて取り付けられる。このため、狭いスペースで複数の配線を電池監視部に接続させることができ、蓄電装置を小型化することが可能になる。
第１導電部の幅は第１外部端子部の幅よりも狭く、第２導電部の幅は第２外部端子部の幅よりも狭い。このため、保護ケースに並べて取り付けた第１及び第２端子部材の沿面距離を長くすることができ、表面漏れ電流を遮断することができる。従って、第１及び第２端子部材間の短絡が生じることを防止することができ、電池監視部により二次電池の過電圧を精度よく検出できる。
また、沿面距離を長くすることができるため、筐体内において結露が生じ表面抵抗が低下した場合でも、表面漏れ電流が流れることを抑制することができ、第１及び第２端子部材間の短絡が生じることを抑制することができる。
また、導電部の幅は外部端子部の幅よりも狭いため、外部端子部の面積を広くすることができ、外部端子部と配線端子部との接触面積を広くすることができる。このことにより配線抵抗を小さくすることができる。The first terminal member attached to the protective case includes a first internal terminal portion arranged inside the protective case, a first external terminal portion arranged outside the protective case, and a first penetration penetrating the protective case. A portion and a first conductive portion provided between the first penetrating portion and the first external terminal portion are provided. The second terminal member attached to the protective case penetrates the protective case with the second internal terminal portion arranged inside the protective case, the second external terminal portion arranged outside the protective case, and the second external terminal portion arranged outside the protective case. It includes a second penetrating portion and a second conductive portion provided between the second penetrating portion and the second external terminal portion. Therefore, the battery monitoring unit housed in the protective case with a plurality of terminal members and the secondary battery arranged outside the protective case can be electrically connected, and the battery monitoring unit overcharges the secondary battery. It becomes possible to detect.
The first terminal member and the second terminal member have a plate shape and are mounted side by side in a protective case. Therefore, a plurality of wires can be connected to the battery monitoring unit in a narrow space, and the power storage device can be miniaturized.
The width of the first conductive portion is narrower than the width of the first external terminal portion, and the width of the second conductive portion is narrower than the width of the second external terminal portion. Therefore, the creepage distance of the first and second terminal members mounted side by side in the protective case can be increased, and the surface leakage current can be cut off. Therefore, it is possible to prevent a short circuit between the first and second terminal members from occurring, and the battery monitoring unit can accurately detect the overvoltage of the secondary battery.
Further, since the creepage distance can be lengthened, it is possible to suppress the flow of surface leakage current even when dew condensation occurs in the housing and the surface resistance is lowered, and a short circuit between the first and second terminal members can be caused. It can be suppressed from occurring.
Further, since the width of the conductive portion is narrower than the width of the external terminal portion, the area of the external terminal portion can be increased, and the contact area between the external terminal portion and the wiring terminal portion can be increased. This makes it possible to reduce the wiring resistance.
本発明の蓄電装置は、複数の二次電池と、複数の二次電池を監視する電池監視部と、前記電池監視部を収容する保護ケースと、前記保護ケースに並べて取り付けられた板状の第１及び第２端子部材と、複数の二次電池、前記電池監視部及び前記保護ケースを収容する筐体とを備え、前記電池監視部は、第１又は第２端子部材を介して前記二次電池の過充電を検出するように設けられ、第１端子部材は、前記保護ケースの内部に配置された第１内部端子部と、前記保護ケースの外部に配置された第１外部端子部と、前記保護ケースを貫通する第１貫通部と、第１貫通部と第１外部端子部との間に設けられた第１導電部とを備え、第２端子部材は、前記保護ケースの内部に配置された第２内部端子部と、前記保護ケースの外部に配置された第２外部端子部と、前記保護ケースを貫通する第２貫通部と、第２貫通部と第２外部端子部との間に設けられた第２導電部とを備え、第１導電部の幅は、第１外部端子部の幅よりも狭く、第２導電部の幅は、第２外部端子部の幅よりも狭いことを特徴とする。 The power storage device of the present invention includes a plurality of secondary batteries, a battery monitoring unit that monitors the plurality of secondary batteries, a protective case that houses the battery monitoring unit, and a plate-shaped first that is attached side by side to the protective case. A first and second terminal member, a plurality of secondary batteries, a battery monitoring unit, and a housing for accommodating the protective case are provided, and the battery monitoring unit is provided with the secondary battery via the first or second terminal member. The first terminal member is provided so as to detect overcharge of the battery, and the first terminal member includes a first internal terminal portion arranged inside the protective case, a first external terminal portion arranged outside the protective case, and the like. A first penetrating portion penetrating the protective case and a first conductive portion provided between the first penetrating portion and the first external terminal portion are provided, and the second terminal member is arranged inside the protective case. Between the second internal terminal portion, the second external terminal portion arranged outside the protective case, the second penetrating portion penetrating the protective case, and the second penetrating portion and the second external terminal portion. The width of the first conductive portion is narrower than the width of the first external terminal portion, and the width of the second conductive portion is narrower than the width of the second external terminal portion. It is characterized by.
本発明の蓄電装置に含まれる第１端子部材の第１導電部は、第１端子部材に切り欠きを設けることにより幅が狭くなった部分であることが好ましく、第２端子部材の第２導電部は、第２端子部材に切り欠きを設けることにより幅が狭くなった部分であることが好ましい。このことにより、第１導電部と第２導電部との間の沿面距離を長くすることができ、表面漏れ電流を遮断することができる。
本発明の蓄電装置は、第１外部端子部と第２外部端子部との間に設けられた隔壁を備えることが好ましい。このことにより、第１外部端子部と第２外部端子部との間の沿面距離を長くすることができ、表面漏れ電流を遮断することができる。従って、第１及び第２外部端子部間の短絡が生じることを防止することができ、電池監視部により二次電池の過電圧を精度よく検出できる。また、沿面距離を長くすることができるため、筐体内において結露が生じ表面抵抗が低下した場合でも、表面漏れ電流が流れることを抑制することができ、第１及び第２外部端子部間の短絡が生じることを防止することができる。The first conductive portion of the first terminal member included in the power storage device of the present invention is preferably a portion whose width is narrowed by providing a notch in the first terminal member, and the second conductive portion of the second terminal member. The portion is preferably a portion whose width is narrowed by providing a notch in the second terminal member. As a result, the creepage distance between the first conductive portion and the second conductive portion can be lengthened, and the surface leakage current can be cut off.
The power storage device of the present invention preferably includes a partition wall provided between the first external terminal portion and the second external terminal portion. As a result, the creepage distance between the first external terminal portion and the second external terminal portion can be increased, and the surface leakage current can be cut off. Therefore, it is possible to prevent a short circuit between the first and second external terminal portions, and the battery monitoring unit can accurately detect the overvoltage of the secondary battery. Further, since the creepage distance can be lengthened, it is possible to suppress the flow of surface leakage current even when dew condensation occurs in the housing and the surface resistance is lowered, and a short circuit between the first and second external terminal portions can be performed. Can be prevented from occurring.
本発明の蓄電装置は、第１又は第２端子部材と並べて保護ケースに取り付けられた第３端子部材を備えることが好ましく、第３端子部材は、保護ケースの内部に配置された第３内部端子部と、保護ケースの外部に配置された第３外部端子部と、保護ケースを貫通する第３貫通部と、第３貫通部と第３外部端子部との間に設けられた第３導電部とを備えることが好ましい。さらに、第３導電部の幅は、第３外部端子部の幅よりも狭く、隔壁は、第１外部端子部と第２外部端子部との間と、第２外部端子部と第３外部端子部との間とに配置されることが好ましい。
このことにより、狭いスペースで３つ以上の配線を電池監視部に接続させることができ、蓄電装置を小型化することが可能になる。さらに、隔壁により、第１外部端子部と第２外部端子部との間、及び第２外部端子部と第３外部端子部との間の沿面距離を長くすることができ、表面漏れ電流を遮断することができる。また、沿面距離を長くすることができるため、筐体内において結露が生じ表面抵抗が低下した場合でも、表面漏れ電流が流れることを抑制することができる。The power storage device of the present invention preferably includes a third terminal member attached to the protective case side by side with the first or second terminal member, and the third terminal member is a third internal terminal arranged inside the protective case. A third conductive portion provided between the portion, the third external terminal portion arranged outside the protective case, the third penetrating portion penetrating the protective case, and the third penetrating portion and the third external terminal portion. It is preferable to provide with. Further, the width of the third conductive portion is narrower than the width of the third external terminal portion, and the partition wall is between the first external terminal portion and the second external terminal portion, and between the second external terminal portion and the third external terminal portion. It is preferable that it is arranged between the portions.
As a result, three or more wires can be connected to the battery monitoring unit in a narrow space, and the power storage device can be miniaturized. Further, the partition wall can increase the creepage distance between the first external terminal portion and the second external terminal portion and between the second external terminal portion and the third external terminal portion, thereby blocking the surface leakage current. can do. Further, since the creepage distance can be lengthened, it is possible to suppress the flow of surface leakage current even when dew condensation occurs in the housing and the surface resistance is lowered.
本発明の蓄電装置に含まれる筐体は、複数の二次電池を収容する容器と、二次電池と電池監視部とを電気的に接続する配線を有しかつ前記容器上に配置された中蓋と、中蓋上に配置された上蓋とを備えることが好ましく、保護ケース及び電池監視部は、中蓋と上蓋との間に配置されたことが好ましい。このことにより、中蓋を配線盤として機能させることができ、中蓋上に配置された配線を介して二次電池と電池監視部とを電気的に接続することができる。
本発明の蓄電装置に含まれる中蓋は並べて配置された第１及び第２配線端子部を有することが好ましく、第１外部端子部は第１配線端子部に重着されることが好ましく、第２外部端子部は第２配線端子部に重着されることが好ましい。このことにより、保護ケースを中蓋に取り付ける際に第１外部端子部と第１配線端子部とを電気的に接続させることができ、第２外部端子部と第２配線端子部と電気的に接続させることができる。
本発明の蓄電装置に含まれる保護ケースは、内部が密閉されるように設けられることが好ましい。このことにより、二次電池の液漏れが生じた場合でも、漏れ出た電解液が電池監視部を収容した保護ケース内に浸入することはなく、電池監視部が損傷することを防止することができる。The housing included in the power storage device of the present invention has a container for accommodating a plurality of secondary batteries, a wiring for electrically connecting the secondary battery and the battery monitoring unit, and is arranged on the container. It is preferable to include a lid and an upper lid arranged on the inner lid, and it is preferable that the protective case and the battery monitoring unit are arranged between the inner lid and the upper lid. As a result, the inner lid can function as a distribution frame, and the secondary battery and the battery monitoring unit can be electrically connected via the wiring arranged on the inner lid.
The inner lid included in the power storage device of the present invention preferably has first and second wiring terminal portions arranged side by side, and the first external terminal portion is preferably heavily attached to the first wiring terminal portion. 2 It is preferable that the external terminal portion is heavily attached to the second wiring terminal portion. As a result, when the protective case is attached to the inner lid, the first external terminal portion and the first wiring terminal portion can be electrically connected, and the second external terminal portion and the second wiring terminal portion can be electrically connected to each other. Can be connected.
The protective case included in the power storage device of the present invention is preferably provided so that the inside is hermetically sealed. As a result, even if the secondary battery leaks, the leaked electrolyte does not enter the protective case containing the battery monitoring unit, and the battery monitoring unit can be prevented from being damaged. it can.
以下、図面を用いて本発明の一実施形態を説明する。図面や以下の記述中で示す構成は、例示であって、本発明の範囲は、図面や以下の記述中で示すものに限定されない。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The configurations shown in the drawings and the following description are examples, and the scope of the present invention is not limited to those shown in the drawings and the following description.
図１は本実施形態の蓄電装置の概略斜視図であり、図２は図１の破線Ａ−Ａにおける蓄電装置の概略断面図であり、図３（ａ）（ｂ）は本実施形態の蓄電装置の概略回路図である。図４は、本実施形態の蓄電装置に含まれる中蓋及び保護ケースの概略上面図であり、電池監視部を保護ケースに取り付けてなく上蓋を中蓋に取り付けてない状態の蓄電装置の概略上面図である。図５（ａ）は図４の破線Ｂ−Ｂにおける保護ケースの概略断面図であり、図５（ｂ）は図４の破線Ｃ−Ｃにおける中蓋の概略断面図である。 FIG. 1 is a schematic perspective view of the power storage device of the present embodiment, FIG. 2 is a schematic cross-sectional view of the power storage device in the broken line AA of FIG. 1, and FIGS. It is a schematic circuit diagram of a device. FIG. 4 is a schematic top view of the inner lid and the protective case included in the power storage device of the present embodiment, and is a schematic top view of the power storage device in a state where the battery monitoring unit is not attached to the protective case and the upper lid is not attached to the inner lid. It is a figure. 5 (a) is a schematic cross-sectional view of the protective case in the broken line BB of FIG. 4, and FIG. 5 (b) is a schematic cross-sectional view of the inner lid in the broken line CC of FIG.
本実施形態の蓄電装置４０は、複数の二次電池２と、複数の二次電池２を監視する電池監視部３と、電池監視部３を収容する保護ケース４と、保護ケース４に並べて取り付けられた板状の第１端子部材５ａ及び第２端子部材５ｂと、複数の二次電池２、電池監視部３及び保護ケース４を収容する筐体１とを備え、電池監視部３は、第１端子部材５ａ又は第２端子部材５ｂを介して二次電池２の過充電を検出するように設けられ、第１端子部材５ａは、保護ケース４の内部に配置された第１内部端子部６ａと、保護ケース４の外部に配置された第１外部端子部７ａと、保護ケース４を貫通する第１貫通部８ａと、第１貫通部８ａと第１外部端子部７ａとの間に設けられた第１導電部９ａとを備え、第２端子部材５ｂは、保護ケース４の内部に配置された第２内部端子部６ｂと、保護ケース４の外部に配置された第２外部端子部７ｂと、保護ケース４を貫通する第２貫通部８ｂと、第２貫通部８ｂと第２外部端子部７ｂとの間に設けられた第２導電部９ｂとを備え、第１導電部９ａの幅は、第１外部端子部７ａの幅よりも狭く、第２導電部９ｂの幅は、第２外部端子部７ｂの幅よりも狭いことを特徴とする。
以下、本実施形態の蓄電装置４０について説明する。The power storage device 40 of the present embodiment is mounted side by side on a plurality of secondary batteries 2, a battery monitoring unit 3 that monitors the plurality of secondary batteries 2, a protective case 4 that houses the battery monitoring unit 3, and a protective case 4. A plate-shaped first terminal member 5a and a second terminal member 5b, and a housing 1 accommodating a plurality of secondary batteries 2, a battery monitoring unit 3, and a protective case 4 are provided. The first terminal member 5a is provided so as to detect the overcharge of the secondary battery 2 via the first terminal member 5a or the second terminal member 5b, and the first terminal member 5a is a first internal terminal portion 6a arranged inside the protective case 4. And the first external terminal portion 7a arranged outside the protective case 4, the first penetrating portion 8a penetrating the protective case 4, and the first penetrating portion 8a and the first external terminal portion 7a are provided. The second terminal member 5b includes a first conductive portion 9a, a second internal terminal portion 6b arranged inside the protective case 4, and a second external terminal portion 7b arranged outside the protective case 4. A second penetrating portion 8b penetrating the protective case 4 and a second conductive portion 9b provided between the second penetrating portion 8b and the second external terminal portion 7b are provided, and the width of the first conductive portion 9a is The width of the second conductive portion 9b is narrower than the width of the first external terminal portion 7a, and the width of the second conductive portion 9b is narrower than the width of the second external terminal portion 7b.
Hereinafter, the power storage device 40 of this embodiment will be described.
１．蓄電装置
本実施形態の蓄電装置４０は、例えば、自動車の電源、自動二輪車の電源、太陽光発電の蓄電、バックアップ電源などに用いられる蓄電装置である。また、蓄電装置４０は、密閉型蓄電装置又は車載用蓄電装置であってもよい。1. 1. Power storage device The power storage device 40 of the present embodiment is a power storage device used, for example, as a power source for automobiles, a power source for motorcycles, a power source for photovoltaic power generation, a backup power source, and the like. Further, the power storage device 40 may be a closed type power storage device or an in-vehicle power storage device.
２．二次電池
蓄電装置４０は、筐体１に収容された複数の二次電池２を備える。二次電池２は、筐体１中に収容された密閉型電池であってもよい。複数の二次電池２は、並列接続されていてもよく、直列接続されていてもよい。また、複数の二次電池２は、配線により電気的に接続されてもよく、隣接する２つの電池２の電池端子３８を接触又は接合させることにより電気的に接続されてもよい。2. 2. The secondary battery power storage device 40 includes a plurality of secondary batteries 2 housed in the housing 1. The secondary battery 2 may be a sealed battery housed in the housing 1. The plurality of secondary batteries 2 may be connected in parallel or may be connected in series. Further, the plurality of secondary batteries 2 may be electrically connected by wiring, or may be electrically connected by contacting or joining the battery terminals 38 of two adjacent batteries 2.
二次電池２は、例えば、リチウムイオン電池、ナトリウムイオン電池、ニッケル・水素電池、ニッケル・カドミウム電池等である。また、二次電池２は、角型であってもよく、円筒型であってもよく、パウチ型であってもよい。また、二次電池２は、正極活物質を有する正極２１と、負極活物質を有する負極２２と、正極２１と負極２２とに挟まれたセパレータ２３と、非水電解質２４と、正極２１と負極２２とセパレータ２３と非水電解質２４とを収容する電池容器２５とを備えることができる。 The secondary battery 2 is, for example, a lithium ion battery, a sodium ion battery, a nickel / hydrogen battery, a nickel / cadmium battery, or the like. Further, the secondary battery 2 may be a square type, a cylindrical type, or a pouch type. Further, the secondary battery 2 includes a positive electrode 21 having a positive electrode active material, a negative electrode 22 having a negative electrode active material, a separator 23 sandwiched between the positive electrode 21 and the negative electrode 22, a non-aqueous electrolyte 24, a positive electrode 21 and a negative electrode. A battery container 25 containing the 22 and the separator 23 and the non-aqueous electrolyte 24 can be provided.
３．筐体
蓄電装置４０は、複数の二次電池２、電池監視部３及び保護ケース４を収容する筐体１を備える。筐体１は密閉構造を有することができる。このことにより、雨水や塵埃が筐体１内に浸入することを防止することができる。一方、筐体１を密閉構造にすると、蓄電装置４０を寒冷地で使用した場合に、筐体１の内部で結露が生じる場合がある。この結露は、絶縁体の表面抵抗を低下させる場合があり、電池監視部３の動作不良を引き起こす場合がある。
筐体１の材料は、硬質プラスチックなどのプラスチックであってもよい。
筐体１は、複数の二次電池２を収容する容器１２と、容器１２上に配置された中蓋１３と、中蓋１３上に配置された上蓋１４とを備えることができる。これらの筐体１を構成する部材を接着する前に容器１２中に複数の二次電池２を入れることにより、密閉構造を有する筐体１中に複数の二次電池２を収容することができる。3. 3. The housing power storage device 40 includes a housing 1 that houses a plurality of secondary batteries 2, a battery monitoring unit 3, and a protective case 4. The housing 1 can have a closed structure. This makes it possible to prevent rainwater and dust from entering the housing 1. On the other hand, if the housing 1 has a closed structure, dew condensation may occur inside the housing 1 when the power storage device 40 is used in a cold region. This dew condensation may reduce the surface resistance of the insulator and may cause a malfunction of the battery monitoring unit 3.
The material of the housing 1 may be a plastic such as a hard plastic.
The housing 1 can include a container 12 for accommodating a plurality of secondary batteries 2, an inner lid 13 arranged on the container 12, and an upper lid 14 arranged on the inner lid 13. By putting a plurality of secondary batteries 2 in the container 12 before adhering the members constituting the housing 1, the plurality of secondary batteries 2 can be housed in the housing 1 having a sealed structure. ..
中蓋１３は、二次電池２と外部接続端子２７とを電気的に接続する配線１６又は二次電池２と電池監視部３とを電気的に接続する配線１６が設けられた配線盤として機能することができる。中蓋１３は、並べて配置された配線端子部１７ａ及び配線端子部１７ｂを有することができる。このことにより、電池監視部３に電気的に接続する端子部材５ａ、５ｂと配線１６とを配線端子部１７ａ、１７ｂを介して電気的に接続させることができる。
また、中蓋１３は、二次電池２の電池端子３８が貫通するスリット３７を有することができ、電池端子３８は、中蓋１３の上面に設けられた接続部３９と接合することができる。このことにより、中蓋１３の上面の配線１６と二次電池２とを電気的に接続することができる。
従って、端子部材５、配線端子部１７、配線１６、接続部３９を介して電池監視部３と二次電池２とを電気的に接続することができる。なお、端子部材５、配線端子部１７、配線１６、接続部３９は、例えば、図３（ａ）（ｂ）の回路図のように電池監視部３と二次電池２とが電気的に接続するように設けることができる。The inner lid 13 functions as a wiring board provided with a wiring 16 for electrically connecting the secondary battery 2 and the external connection terminal 27 or a wiring 16 for electrically connecting the secondary battery 2 and the battery monitoring unit 3. can do. The inner lid 13 can have a wiring terminal portion 17a and a wiring terminal portion 17b arranged side by side. As a result, the terminal members 5a and 5b electrically connected to the battery monitoring unit 3 and the wiring 16 can be electrically connected via the wiring terminal portions 17a and 17b.
Further, the inner lid 13 can have a slit 37 through which the battery terminal 38 of the secondary battery 2 penetrates, and the battery terminal 38 can be joined to the connection portion 39 provided on the upper surface of the inner lid 13. As a result, the wiring 16 on the upper surface of the inner lid 13 and the secondary battery 2 can be electrically connected.
Therefore, the battery monitoring unit 3 and the secondary battery 2 can be electrically connected via the terminal member 5, the wiring terminal unit 17, the wiring 16, and the connection unit 39. The terminal member 5, the wiring terminal portion 17, the wiring 16, and the connection portion 39 are electrically connected to the battery monitoring unit 3 and the secondary battery 2 as shown in the circuit diagrams of FIGS. 3 (a) and 3 (b), for example. Can be provided as such.
筐体１を構成する各部材は、筐体１の内部が密閉空間となるように接着することができる。このことにより、筐体１内に水などが浸入することを防止することができ、蓄電装置４０の安全性及び寿命特性を向上させることができる。筐体１を構成する各部材は、例えば、接着剤により接着することができる。
筐体１は、安全弁を備えてもよい。このことにより、二次電池２において発生したガスが筐体１内に放出され筐体１の内部圧力が上昇した場合でも、安全弁からガスを筐体１の外部に放出することができる。Each member constituting the housing 1 can be adhered so that the inside of the housing 1 becomes a closed space. As a result, it is possible to prevent water or the like from entering the housing 1, and it is possible to improve the safety and life characteristics of the power storage device 40. Each member constituting the housing 1 can be adhered with, for example, an adhesive.
The housing 1 may be provided with a safety valve. As a result, even when the gas generated in the secondary battery 2 is discharged into the housing 1 and the internal pressure of the housing 1 rises, the gas can be discharged from the safety valve to the outside of the housing 1.
４．電池監視部
電池監視部３は、複数の二次電池２を監視する部分である。電池監視部３は、例えば、電子部品を実装した電子回路基板である。電池監視部３は、電子回路基板の一部であってもよい。電池監視部３は複数の電子回路基板を含んでもよい。また、電池監視部３は、保護ケース４に収容される。電池監視部３は、二次電池２、ヒューズ３４、リレー３５又は外部接続端子２７と電気的に接続することができる。このことにより、電池監視部３により二次電池２を監視することができる。電池監視部３は、ヒューズ３４、リレー３５を、保護ケース４に収納されている電子回路基板の一部として有することもできる。4. Battery monitoring unit The battery monitoring unit 3 is a unit that monitors a plurality of secondary batteries 2. The battery monitoring unit 3 is, for example, an electronic circuit board on which electronic components are mounted. The battery monitoring unit 3 may be a part of the electronic circuit board. The battery monitoring unit 3 may include a plurality of electronic circuit boards. Further, the battery monitoring unit 3 is housed in the protective case 4. The battery monitoring unit 3 can be electrically connected to the secondary battery 2, the fuse 34, the relay 35, or the external connection terminal 27. As a result, the battery monitoring unit 3 can monitor the secondary battery 2. The battery monitoring unit 3 may also have the fuse 34 and the relay 35 as a part of the electronic circuit board housed in the protective case 4.
電池監視部３は、各電池２の電圧を測定するように設けることができる。また、電池監視部３は、各電池２のプラス端子及びマイナス端子とそれぞれ電気的に接続することができる。また、電池監視部３は、電池２の電圧測定の結果に基づき過充電を検出するように設けることができる。また、電池監視部３は、少なくとも１つの電池２の過充電を検出するとヒューズ３４又はリレー３５により電池２と外部接続端子２７との接続を切る信号を出力するように設けることができる。このことにより、少なくとも１つの電池２に過充電が生じたときに強制的に電流を遮断することができ、蓄電装置４０の安全性を向上させることができる。
電池監視部３は、電池２の過放電を検出するように設けてもよく、筐体１内の温度を測定するように設けてもよく、過電流を検出するように設けてもよい。また、電池監視部３は、容器１２に収容した複数の電池２の電圧のバランスを保つように設けることができる。このことにより、複数の電池２の電圧のアンバランスにより生じる電池２のダメージを軽減することができ、蓄電装置４０の寿命特性を向上させることができる。なお、電池監視部３は、各電池２に対応したバランサーを有することができる。The battery monitoring unit 3 can be provided so as to measure the voltage of each battery 2. Further, the battery monitoring unit 3 can be electrically connected to the positive terminal and the negative terminal of each battery 2. Further, the battery monitoring unit 3 can be provided so as to detect overcharge based on the result of voltage measurement of the battery 2. Further, the battery monitoring unit 3 can be provided so as to output a signal for disconnecting the battery 2 and the external connection terminal 27 by the fuse 34 or the relay 35 when the overcharge of at least one battery 2 is detected. As a result, the current can be forcibly cut off when at least one battery 2 is overcharged, and the safety of the power storage device 40 can be improved.
The battery monitoring unit 3 may be provided so as to detect an overdischarge of the battery 2, may be provided so as to measure the temperature inside the housing 1, or may be provided so as to detect an overcurrent. Further, the battery monitoring unit 3 can be provided so as to maintain the voltage balance of the plurality of batteries 2 housed in the container 12. As a result, the damage to the batteries 2 caused by the imbalance of the voltages of the plurality of batteries 2 can be reduced, and the life characteristics of the power storage device 40 can be improved. The battery monitoring unit 3 can have a balancer corresponding to each battery 2.
５．保護ケース、端子部材
保護ケース４は、電池監視部３を収容するケースであり、筐体１に収容される。また、保護ケース４は、内部が密閉空間となるように密閉されてもよい。このため、筐体１内の電池２を収容するスペースと電池監視部３を収容するスペースとを分離することができる。この構成により、電池２の液漏れが生じた場合でも、漏れ出た電解液が電池監視部３を収容した保護ケース４内に浸入することを抑制することができ、電池監視部３が損傷することを防止することができる。このため、蓄電装置４０の安全性を向上させることができる。保護ケース４は、例えば、プラスチックケースである。また、保護ケース４は、ヒューズ３４又はリレー３５を収容してもよい。
電池監視部３を配置する密閉空間は、例えば、図２に示した蓄電装置４０のように、保護ケース４とシール部材１９とで形成されてもよい。シール部材１９は、例えば、ゴムシートである。5. Protective case and terminal member The protective case 4 is a case for accommodating the battery monitoring unit 3, and is accommodated in the housing 1. Further, the protective case 4 may be sealed so that the inside becomes a closed space. Therefore, the space for accommodating the battery 2 and the space for accommodating the battery monitoring unit 3 in the housing 1 can be separated. With this configuration, even if the battery 2 leaks, it is possible to prevent the leaked electrolyte from entering the protective case 4 containing the battery monitoring unit 3, and the battery monitoring unit 3 is damaged. Can be prevented. Therefore, the safety of the power storage device 40 can be improved. The protective case 4 is, for example, a plastic case. Further, the protective case 4 may accommodate the fuse 34 or the relay 35.
The sealed space in which the battery monitoring unit 3 is arranged may be formed by the protective case 4 and the seal member 19 as in the power storage device 40 shown in FIG. 2, for example. The seal member 19 is, for example, a rubber sheet.
蓄電装置４０は、保護ケース４に取り付けられた複数の端子部材５を有する。端子部材５は、保護ケース４の内部と外部とを電気的に接続する部材であり、電池監視部３と二次電池２とを電気的に接続する配線の一部となる。
端子部材５は、板状である。従って、金属板を板金加工することにより端子部材５を作製することができる。The power storage device 40 has a plurality of terminal members 5 attached to the protective case 4. The terminal member 5 is a member that electrically connects the inside and the outside of the protective case 4, and is a part of the wiring that electrically connects the battery monitoring unit 3 and the secondary battery 2.
The terminal member 5 has a plate shape. Therefore, the terminal member 5 can be manufactured by sheet metal processing the metal plate.
各端子部材５は、保護ケース４の内部に配置された内部端子部６と、保護ケース４の外部に配置された外部端子部７と、保護ケース４を貫通する貫通部８と、貫通部８と外部端子部７との間に設けられた導電部９とを備える。
内部端子部６は、保護ケース４に収容された電池監視部３に接続することができる。例えば、保護ケース４内に電池監視部３を固定することにより内部端子部６と電池監視部３とが電気的に接続することができる。また、内部端子部６と電池監視部３ははんだ付けにより接続してもよい。
外部端子部７は、中蓋１３上に設けられた配線端子部１７に接続することができる。また、外部端子部７は、配線端子部１７に重着されてもよい。例えば、外部端子部７及び配線端子部１７はそれぞれボルト挿入孔を有することができる。このことにより、ボルト３１とナット３２の締め付け力により外部端子部７と配線端子部１７とを密着させ電気的に接続することができる。Each terminal member 5 has an internal terminal portion 6 arranged inside the protective case 4, an external terminal portion 7 arranged outside the protective case 4, a penetrating portion 8 penetrating the protective case 4, and a penetrating portion 8. A conductive portion 9 provided between the and the external terminal portion 7 is provided.
The internal terminal unit 6 can be connected to the battery monitoring unit 3 housed in the protective case 4. For example, by fixing the battery monitoring unit 3 in the protective case 4, the internal terminal unit 6 and the battery monitoring unit 3 can be electrically connected to each other. Further, the internal terminal unit 6 and the battery monitoring unit 3 may be connected by soldering.
The external terminal portion 7 can be connected to the wiring terminal portion 17 provided on the inner lid 13. Further, the external terminal portion 7 may be heavily attached to the wiring terminal portion 17. For example, the external terminal portion 7 and the wiring terminal portion 17 can each have a bolt insertion hole. As a result, the external terminal portion 7 and the wiring terminal portion 17 can be brought into close contact with each other and electrically connected by the tightening force of the bolt 31 and the nut 32.
貫通部８は、端子部材５が保護ケース４を貫通する部分である。貫通部８は、端子部材５と保護ケース４とを、金属‐樹脂一体成型することにより形成することができる。また、端子部材５と保護ケース４とが接触した部分は、端子部材５の表面の微細孔内に保護ケース４を構成するプラスチックが入り込むことにより接合することができる。このことにより、端子部材５を保護ケース４に固定することができる。また、保護ケース４の密閉性を向上させることができる。
導電部９は、貫通部８と外部端子部７とを電気的に接続する部分である。導電部９を設けることにより、外部端子部７を適切な位置に配置することができる。The penetrating portion 8 is a portion through which the terminal member 5 penetrates the protective case 4. The penetrating portion 8 can be formed by integrally molding the terminal member 5 and the protective case 4 with metal and resin. Further, the portion where the terminal member 5 and the protective case 4 are in contact with each other can be joined by inserting the plastic constituting the protective case 4 into the fine holes on the surface of the terminal member 5. As a result, the terminal member 5 can be fixed to the protective case 4. In addition, the airtightness of the protective case 4 can be improved.
The conductive portion 9 is a portion that electrically connects the penetrating portion 8 and the external terminal portion 7. By providing the conductive portion 9, the external terminal portion 7 can be arranged at an appropriate position.
複数の端子部材５は、保護ケース４に並べて取り付けられる。また、複数の配線端子部１７が中蓋１３上に並べて配置される。各端子部材５の外部端子部７は、各配線端子部１７に重着される。このため、少ないスペースで電池監視部３が多くの配線と接続することができ、蓄電装置４０を小型化することができる。また、複数の端子部材５は、各端子部材５の側面が対向するように保護ケース４に並べて取り付けることができる。
なお、保護ケース４に並べて取り付ける端子部材５の数は、２、３、４、５、６、７、８、９又は１０とすることができる。The plurality of terminal members 5 are attached side by side to the protective case 4. Further, a plurality of wiring terminal portions 17 are arranged side by side on the inner lid 13. The external terminal portion 7 of each terminal member 5 is heavily attached to each wiring terminal portion 17. Therefore, the battery monitoring unit 3 can be connected to many wirings in a small space, and the power storage device 40 can be miniaturized. Further, the plurality of terminal members 5 can be attached side by side to the protective case 4 so that the side surfaces of the terminal members 5 face each other.
The number of terminal members 5 attached side by side to the protective case 4 may be 2, 3, 4, 5, 6, 7, 8, 9 or 10.
隣接する外部端子部７ａと外部端子部７ｂとの間に隔壁１１を設けることができる。また、隔壁１１は、隣接する配線端子部１７ａと配線端子部１７ｂとの間に設けることができる。このことにより、外部端子部７ａと外部端子部７ｂとの間の沿面距離を長くすることができ、表面漏れ電流を遮断することができる。また、沿面距離を長くすることができるため、筐体内において結露が生じ表面抵抗が低下した場合でも、表面漏れ電流が流れることを抑制することができる。
隔壁１１は、隣接する外部端子部７ｂと外部端子部７ｃとの間に設けることもできる。また、隔壁１１は、並んで配置された３つの外部端子部７のうち真ん中の外部端子部７ｂを囲むように設けることができる。
隔壁１１は、例えば、図４、図５（ｂ）のように設けることができる。
一方、端子部材５の保護ケース４に埋め込まれた部分又は接触する部分は、隔壁１１により沿面距離を長くすることは難しい。A partition wall 11 can be provided between the adjacent external terminal portion 7a and the external terminal portion 7b. Further, the partition wall 11 can be provided between the adjacent wiring terminal portion 17a and the wiring terminal portion 17b. As a result, the creepage distance between the external terminal portion 7a and the external terminal portion 7b can be lengthened, and the surface leakage current can be cut off. Further, since the creepage distance can be lengthened, it is possible to suppress the flow of surface leakage current even when dew condensation occurs in the housing and the surface resistance is lowered.
The partition wall 11 can also be provided between the adjacent external terminal portion 7b and the external terminal portion 7c. Further, the partition wall 11 can be provided so as to surround the outer terminal portion 7b in the middle of the three external terminal portions 7 arranged side by side.
The partition wall 11 can be provided, for example, as shown in FIGS. 4 and 5 (b).
On the other hand, it is difficult to increase the creepage distance of the portion of the terminal member 5 embedded in the protective case 4 or the portion in contact with the protective case 4 by the partition wall 11.
端子部材５ａの導電部９ａの幅Ｗxaは、外部端子部７ａの幅Ｗyaよりも狭い。また、端子部材５ａに隣接して配置された端子部材５ｂの導電部９ｂの幅Ｗxbは、外部端子部７ｂの幅Ｗybよりも狭い。このことにより、隣接する導電部９ａと導電部９ｂとの間の沿面距離Ｄabを長くすることができ、表面漏れ電流を遮断することができる。特に、端子部材５の保護ケース４に埋め込まれた部分又は接触する部分であっても、沿面距離を長くすることができる。また、沿面距離を長くすることができるため、筐体１内において結露が生じ表面抵抗が低下した場合でも、表面漏れ電流が流れることを抑制することができる。また、導電部９ａ、９ｂ間の沿面距離を、結露により生じる水滴の大きさよりも十分に大きくすることができ、導電部９ａ、９ｂが水滴によりブリッジされ短絡することを防止することができる。
また、外部端子部７の面積を広くすることができ、外部端子部７と配線端子部１７との接触面積を広くすることができる。このことにより配線抵抗を小さくすることができる。
例えば、図４、図５（ａ）のように導電部９を設けることができ、沿面距離Ｄab、Ｄbcを長くすることができる。 The width W xa of the conductive portion 9a of the terminal member 5a is narrower than the width W ya of the external terminal portion 7a. Further, the width W xb of the conductive portion 9b of the terminal member 5b arranged adjacent to the terminal member 5a is narrower than the width W yb of the external terminal portion 7b. Thus, it is possible to lengthen the creepage distance D ab between the adjacent conductive portions 9a and the conductive portion 9b, it is possible to cut off the surface leakage current. In particular, the creepage distance can be increased even in the portion of the terminal member 5 embedded in the protective case 4 or the portion in contact with the protective case 4. Further, since the creepage distance can be lengthened, it is possible to suppress the flow of surface leakage current even when dew condensation occurs in the housing 1 and the surface resistance is lowered. Further, the creepage distance between the conductive portions 9a and 9b can be made sufficiently larger than the size of the water droplets generated by dew condensation, and the conductive portions 9a and 9b can be prevented from being bridged by the water droplets and short-circuited.
Further, the area of the external terminal portion 7 can be increased, and the contact area between the external terminal portion 7 and the wiring terminal portion 17 can be increased. This makes it possible to reduce the wiring resistance.
For example, as shown in FIGS. 4 and 5 (a), the conductive portion 9 can be provided, and the creepage distances D ab and D bc can be lengthened.
導電部９は、端子部材５に切り欠きを設けることにより幅が狭くなった部分であってもよい。また、導電部９は、端子部材５の一方の側面に切り欠きを設けることにより形成された部分であってもよい。また、隣接する２つの端子部材５は、一方の端子部材５ｂの切り欠きを設けた側面と、他方の端子部材５ａの切り欠きを設けていない側面とが対向するように保護ケース４に取り付けることができる。このことにより、隣接する２つの導電部９の沿面距離を長くすることができる。また、端子部材５の製造コストを低減することができる。 The conductive portion 9 may be a portion whose width is narrowed by providing a notch in the terminal member 5. Further, the conductive portion 9 may be a portion formed by providing a notch on one side surface of the terminal member 5. Further, the two adjacent terminal members 5 are attached to the protective case 4 so that the side surface of one terminal member 5b provided with the notch and the side surface of the other terminal member 5a not provided with the notch face each other. Can be done. As a result, the creepage distance between the two adjacent conductive portions 9 can be increased. Moreover, the manufacturing cost of the terminal member 5 can be reduced.
１：筐体 ２、２ａ、２ｂ、２ｃ、２ｄ：二次電池 ３：電池監視部 ４：保護ケース ５、５ａ、５ｂ、５ｃ：端子部材 ６、６ａ、６ｂ、６ｃ：内部端子部 ７、７ａ、７ｂ、７ｃ：外部端子部 ８、８ａ、８ｂ、８ｃ：貫通部 ９、９ａ、９ｂ、９ｃ：導電部 １１：隔壁 １２：容器 １３：中蓋 １４：上蓋 １６：配線 １７、１７ａ、１７ｂ、１７ｃ：配線端子部 １９：シール部材 ２１：正極 ２２：負極 ２３：セパレータ ２４：非水電解質 ２５：電池容器 ２７、２７ａ、２７ｂ：外部接続端子 ３１、３１ａ、３１ｂ、３１ｃ：ボルト ３２、３２ａ、３２ｂ、３２ｃ：ナット ３４：ヒューズ ３５：リレー ３６：接合用凸部 ３７：スリット ３８：電池端子 ３９：接続部 ４０：蓄電装置 1: Housing 2, 2a, 2b, 2c, 2d: Secondary battery 3: Battery monitoring unit 4: Protective case 5, 5a, 5b, 5c: Terminal member 6, 6a, 6b, 6c: Internal terminal unit 7, 7a , 7b, 7c: External terminal parts 8, 8a, 8b, 8c: Penetration part 9, 9a, 9b, 9c: Conductive part 11: Partition 12: Container 13: Inner lid 14: Top lid 16: Wiring 17, 17a, 17b, 17c: Wiring terminal 19: Sealing member 21: Positive electrode 22: Negative electrode 23: Separator 24: Non-aqueous electrolyte 25: Battery container 27, 27a, 27b: External connection terminals 31, 31a, 31b, 31c: Bolts 32, 32a, 32b , 32c: Nut 34: Fuse 35: Relay 36: Convex part for joining 37: Slit 38: Battery terminal 39: Connection part 40: Power storage device
Claims (7)
前記電池監視部は、第１又は第２端子部材を介して前記二次電池の過充電を検出するように設けられ、
第１端子部材は、前記保護ケースの内部に配置された第１内部端子部と、前記保護ケースの外部に配置された第１外部端子部と、前記保護ケースを貫通する第１貫通部と、第１貫通部と第１外部端子部との間に設けられた第１導電部とを備え、
第２端子部材は、前記保護ケースの内部に配置された第２内部端子部と、前記保護ケースの外部に配置された第２外部端子部と、前記保護ケースを貫通する第２貫通部と、第２貫通部と第２外部端子部との間に設けられた第２導電部とを備え、
前記外部接続端子は、前記二次電池と電気的に接続し、
第１導電部の幅が第１外部端子部の幅よりも狭く、第２導電部の幅が第２外部端子部の幅よりも狭いことで第１導電部と第２導電部の間の距離が、第１外部端子部と第２外部端子部の間の距離より長くなっていることを特徴とする蓄電装置。 A plurality of secondary batteries, a battery monitoring unit that monitors the plurality of secondary batteries, a protective case that houses the battery monitoring unit, and plate-shaped first and second terminal members that are attached side by side to the protective case. A housing for accommodating a plurality of secondary batteries, the battery monitoring unit and the protective case, and an external connection terminal arranged on the outer surface of the housing .
The battery monitoring unit is provided so as to detect overcharging of the secondary battery via the first or second terminal member.
The first terminal member includes a first internal terminal portion arranged inside the protective case, a first external terminal portion arranged outside the protective case, and a first penetrating portion penetrating the protective case. A first conductive portion provided between the first penetrating portion and the first external terminal portion is provided.
The second terminal member includes a second internal terminal portion arranged inside the protective case, a second external terminal portion arranged outside the protective case, and a second penetrating portion penetrating the protective case. A second conductive portion provided between the second penetrating portion and the second external terminal portion is provided.
The external connection terminal is electrically connected to the secondary battery and is connected to the secondary battery.
The distance between the first conductive portion and the second conductive portion because the width of the first conductive portion is narrower than the width of the first external terminal portion and the width of the second conductive portion is narrower than the width of the second external terminal portion. However, the power storage device is characterized in that it is longer than the distance between the first external terminal portion and the second external terminal portion.
第２導電部は、第２端子部材に切り欠きを設けることにより幅が狭くなった部分である請求項１に記載の蓄電装置。 The first conductive portion is a portion whose width is narrowed by providing a notch in the first terminal member.
The power storage device according to claim 1, wherein the second conductive portion is a portion whose width is narrowed by providing a notch in the second terminal member.
第３端子部材は、前記保護ケースの内部に配置された第３内部端子部と、前記保護ケースの外部に配置された第３外部端子部と、前記保護ケースを貫通する第３貫通部と、第３貫通部と第３外部端子部との間に設けられた第３導電部とを備え、
第３導電部の幅は、第３外部端子部の幅よりも狭く、
前記隔壁は、第１外部端子部と第２外部端子部との間と、第２外部端子部と第３外部端子部との間とに配置された請求項３に記載の蓄電装置。 A third terminal member attached to the protective case alongside the first or second terminal member is further provided.
The third terminal member includes a third internal terminal portion arranged inside the protective case, a third external terminal portion arranged outside the protective case, and a third penetrating portion penetrating the protective case. A third conductive portion provided between the third penetrating portion and the third external terminal portion is provided.
The width of the third conductive portion is narrower than the width of the third external terminal portion.
The power storage device according to claim 3, wherein the partition wall is arranged between the first external terminal portion and the second external terminal portion and between the second external terminal portion and the third external terminal portion.
前記保護ケース及び前記電池監視部は、前記中蓋と前記上蓋との間に配置された請求項１〜４のいずれか１つに記載の蓄電装置。 The housing includes a container for accommodating a plurality of secondary batteries, an inner lid having a wiring for electrically connecting the secondary battery and the battery monitoring unit, and an inner lid arranged on the container. With an upper lid placed on the lid,
The power storage device according to any one of claims 1 to 4, wherein the protective case and the battery monitoring unit are arranged between the inner lid and the upper lid.
第１外部端子部は、第１配線端子部に重着され、
第２外部端子部は、第２配線端子部に重着された請求項５に記載の蓄電装置。 The inner lid has first and second wiring terminals arranged side by side.
The first external terminal portion is heavily attached to the first wiring terminal portion.
The power storage device according to claim 5, wherein the second external terminal portion is heavily attached to the second wiring terminal portion.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2016/068691 WO2017221379A1 (en) | 2016-06-23 | 2016-06-23 | Power storage device |
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| JPWO2017221379A1 JPWO2017221379A1 (en) | 2019-04-11 |
| JP6840397B2 true JP6840397B2 (en) | 2021-03-10 |
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| JP7094697B2 (en) * | 2017-12-25 | 2022-07-04 | 矢崎総業株式会社 | Battery pack |
| JP7226236B2 (en) * | 2019-10-11 | 2023-02-21 | 株式会社デンソー | battery pack |
| JP7364101B1 (en) | 2023-01-19 | 2023-10-18 | Tdk株式会社 | Storage battery partition sheet and storage battery system |
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