WO2017029865A1 - Bloc-batterie - Google Patents

Bloc-batterie Download PDF

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Publication number
WO2017029865A1
WO2017029865A1 PCT/JP2016/067559 JP2016067559W WO2017029865A1 WO 2017029865 A1 WO2017029865 A1 WO 2017029865A1 JP 2016067559 W JP2016067559 W JP 2016067559W WO 2017029865 A1 WO2017029865 A1 WO 2017029865A1
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WO
WIPO (PCT)
Prior art keywords
housing
battery cell
bottom portion
battery
battery pack
Prior art date
Application number
PCT/JP2016/067559
Other languages
English (en)
Japanese (ja)
Inventor
拓 井上
加藤　崇行
浩生 植田
Original Assignee
株式会社豊田自動織機
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 株式会社豊田自動織機 filed Critical 株式会社豊田自動織機
Publication of WO2017029865A1 publication Critical patent/WO2017029865A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/651—Means for temperature control structurally associated with the cells characterised by parameters specified by a numeric value or mathematical formula, e.g. ratios, sizes or concentrations
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • 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

Definitions

  • the present invention relates to a battery pack.
  • Patent Document 1 describes an assembled battery that houses a plurality of single cells in a casing.
  • the housing of this assembled battery has a structure in which a plurality of battery cases are stacked.
  • Each battery case contains a plurality of single cells.
  • Battery cells are repeatedly charged and discharged as they are used. Battery cells generate heat particularly during charging. A battery cell deteriorates with high temperature. Therefore, in order to suppress the deterioration of the battery cell, it is necessary to improve the heat dissipation of the battery cell.
  • the heat released from the battery cell is released to the outside and inside of the casing through the casing.
  • a housing having a structure in which a plurality of cases are stacked as described above includes a wall portion having a surface exposed to the outside of the housing, and a wall portion that is located almost entirely inside the housing.
  • the temperature outside the casing is usually lower than the temperature inside the casing. Heat is more easily transmitted as the temperature difference increases. Therefore, the heat dissipation of the wall portion, which is located almost entirely within the housing, is lower than the heat dissipation of the wall portion having the surface exposed to the outside. Due to this difference, the heat dissipation of the battery cell may vary among a plurality of cases. Along with this, a temperature difference occurs between the battery cells, and the degree of deterioration may vary among the battery cells. The life of the battery pack depends on the battery cell with the greatest deterioration. For this reason, if the deterioration of some battery cells proceeds, the life of the battery pack may be shortened.
  • the present invention provides a battery pack capable of suppressing variation in heat dissipation of battery cells among a plurality of housing units.
  • the battery pack includes a first battery cell and a second battery cell, and a housing that houses the first battery cell and the second battery cell.
  • the housing includes a first housing portion and a second housing portion.
  • the first accommodating portion has a first bottom portion and accommodates the first battery cell.
  • the second accommodating portion has a second bottom portion and accommodates the second battery cell.
  • the second housing part is stacked on the first housing part.
  • the first bottom portion is disposed on the side opposite to the second housing portion.
  • the second bottom portion is disposed on the first housing portion side.
  • the heat capacity of the second bottom is greater than the heat capacity of the first bottom.
  • the heat of the first battery cell is released to the outside or the inside of the housing through the first housing portion.
  • the heat of the second battery cell is released to the outside or the inside of the housing through the second housing part.
  • the first bottom part of the first housing part has a surface exposed to the outside of the housing.
  • the second bottom portion of the second accommodating portion is substantially entirely located inside the housing. Therefore, in terms of heat dissipation, the temperature of the second bottom tends to be higher than the temperature of the first bottom.
  • the heat capacity of the second bottom portion is set larger than the heat capacity of the first bottom portion.
  • the heat capacities of the first bottom portion and the second bottom portion suppress variation between the influence of the first bottom portion on the heat dissipation performance of the first battery cell and the influence of the second bottom portion on the heat dissipation performance of the second battery cell. Is set to As a result, it is possible to suppress variation in heat dissipation between the first battery cell and the second battery cell.
  • the thickness of the second bottom may be greater than the thickness of the first bottom.
  • the heat capacity of the first bottom is proportional to the thickness of the first bottom, and the heat capacity of the second bottom is proportional to the thickness of the second bottom. Therefore, in this case, the heat capacity of the second bottom can be made larger than the heat capacity of the first bottom.
  • the battery pack according to an aspect of the present invention includes a first battery cell and a second battery cell, and a housing that houses the first battery cell and the second battery cell.
  • the housing includes a first housing portion and a second housing portion.
  • the first accommodating portion has a first bottom portion and accommodates the first battery cell.
  • the second accommodating portion has a second bottom portion and accommodates the second battery cell.
  • the second housing part is stacked on the first housing part.
  • the first bottom portion is disposed on the side opposite to the second housing portion.
  • the second bottom portion is disposed on the first housing portion side.
  • the thermal conductivity of the second bottom is higher than the thermal conductivity of the first bottom.
  • the heat of the first battery cell is released to the outside or the inside of the housing through the first housing portion.
  • the heat of the second battery cell is released to the outside or the inside of the housing through the second housing part.
  • the first bottom part of the first housing part has a surface exposed to the outside of the housing.
  • the second bottom portion of the second accommodating portion is substantially entirely located inside the housing. Therefore, in terms of heat dissipation, the temperature of the second bottom tends to be higher than the temperature of the first bottom.
  • the thermal conductivity of the second bottom portion is set higher than the thermal conductivity of the first bottom. Since heat is more easily transmitted as the thermal conductivity is higher, the heat of the second battery cell is easily released to the first housing portion through the second bottom portion. That is, the thermal conductivity of the first bottom portion and the second bottom portion suppresses variation between the influence of the first bottom portion on the heat dissipation of the first battery cell and the influence of the second bottom portion on the heat dissipation of the second battery cell. It is set to be. As a result, it is possible to suppress variation in heat dissipation between the first battery cell and the second battery cell.
  • the first battery cell may be attached to the first bottom part
  • the second battery cell may be attached to the second bottom part.
  • the surface facing the first bottom portion of the first housing portion may form a first opening, and the second housing portion is stacked on the first housing portion so as to close the first opening with the second bottom portion. Also good.
  • the 1st accommodating part does not have the cover part which opposes a 1st bottom part. Therefore, the configuration of the first housing part can be simplified.
  • a plurality of concave portions may be provided on the surface of the second bottom portion located on the first housing portion side.
  • the surface area of the surface located on the first housing portion side of the second bottom portion is increased, and heat is easily released from the second bottom portion to the first housing portion.
  • the temperature rise of the second bottom portion is further suppressed. Therefore, the heat dissipation of the 2nd battery cell with respect to a 2nd bottom part can further be improved. As a result, it is possible to further suppress variation in heat dissipation between the first battery cell and the second battery cell.
  • the 1st accommodating part and the 2nd accommodating part may be constituted as a separate object, and the 2nd bottom part has the convex part which fits into the 1st opening in the field located in the 1st accommodating part side. It may be. In this case, positioning between the 1st accommodating part and the 2nd accommodating part can be performed easily.
  • FIG. 2 is a cross-sectional view taken along the line II-II in FIG. It is sectional drawing of the battery pack which concerns on 2nd Embodiment. It is sectional drawing of the battery pack which concerns on 3rd Embodiment. It is sectional drawing of the battery pack which concerns on 4th Embodiment.
  • the X direction is a direction in which a plurality of first battery cells 3a (see FIG. 1) described later are arranged.
  • the Y direction is a direction orthogonal to the X direction and a pair of side wall portions 12 (see FIG. 1) described later face each other.
  • the Z direction is a direction orthogonal to the X direction and the Y direction.
  • FIG. 1 is a perspective view showing a part of the battery pack according to the first embodiment in a cutaway manner.
  • FIG. 2 is a sectional view taken along line II-II in FIG.
  • the battery pack 1A includes a first battery module 2a and a second battery module 2b, and a housing 4 that houses the first battery module 2a and the second battery module 2b.
  • the battery pack 1A is a device used as a battery of a vehicle such as a forklift, and is housed in a battery housing portion of a predetermined size provided in the vehicle.
  • the first battery module 2a has a plurality of first battery cells 3a.
  • the first battery cell 3a is a storage battery such as a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery, or an electric double layer capacitor.
  • the plurality of first battery cells 3a are electrically connected to each other and arranged in the X direction. In the state in which the plurality of first battery cells 3a are arranged in this manner, the first battery cells 3a are integrated by being fixed to each other by, for example, a pair of end plates (not shown) arranged on both sides in the X direction.
  • Brackets (not shown) for fixing and attaching the first battery module 2a to the housing 4 are attached to both ends (that is, end plates) in the arrangement direction of the first battery modules 2a.
  • the bracket is attached to the first battery module 2a with a bolt, for example.
  • the second battery module 2b has a plurality of second battery cells 3b.
  • the second battery cell 3b is a storage battery such as a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery, or an electric double layer capacitor.
  • the plurality of second battery cells 3b are electrically connected to each other and arranged in the X direction. In the state in which the plurality of second battery cells 3b are arranged in this manner, for example, they are integrated by being fixed to each other by a pair of end plates (not shown) disposed on both sides in the X direction.
  • Brackets (not shown) for fixing and attaching the second battery module 2b to the housing 4 are attached to both ends (that is, end plates) in the arrangement direction of the second battery module 2b.
  • the bracket is attached to the second battery module 2b with a bolt, for example.
  • the second battery cell 3b has a configuration equivalent to that of the first battery cell 3a.
  • the second battery module 2b has a configuration equivalent to that
  • the housing 4 has a rectangular parallelepiped shape.
  • the housing 4 is made of, for example, a metal such as iron or aluminum.
  • casing 4 is formed with the same metal material as a whole.
  • the housing 4 includes a first housing part 10, a second housing part 20, a lid part 5, a front wall part 6, and a rear wall part 7.
  • the first storage unit 10 stores a plurality of first battery cells 3a.
  • the first accommodating portion 10 has a U-shaped cross section, and has a first bottom portion 11 and a pair of side wall portions 12. A surface facing the first bottom portion 11 of the first housing portion 10 along the Z direction forms a first opening A1.
  • the first bottom portion 11 is a rectangular flat plate.
  • the thickness t1 of the first bottom portion 11 is 20 mm, for example.
  • the 1st bottom part 11 has the attachment surface 11a to which the 1st battery module 2a is attached, and the back surface 11b of the back side of the attachment surface 11a.
  • the mounting surface 11a is exposed in the first accommodating portion 10.
  • the back surface 11 b is exposed to the outside of the housing 4.
  • a total of four first battery modules 2a are attached to the attachment surface 11a by brackets, two in the X direction and two in the Y direction.
  • the number and arrangement of the first battery modules 2a are not limited to this.
  • the pair of side wall portions 12 are rectangular flat plates facing each other in the Y direction.
  • the thickness of the pair of side wall portions 12 is, for example, 20 mm.
  • the pair of side wall portions 12 extend in the Z direction from both end portions of the first bottom portion 11 in the Y direction.
  • the first bottom portion 11 and the pair of side wall portions 12 are integrally formed.
  • the 1st bottom part 11 and a pair of side wall part 12 are separate bodies, and the 1st accommodating part 10 may be comprised by these combination.
  • the second storage unit 20 stores a plurality of second battery cells 3b.
  • the second accommodating portion 20 has a U-shaped cross section, and has a second bottom portion 21 and a pair of side wall portions 22. A surface facing the second bottom portion 21 of the second housing portion 20 along the Z direction forms a second opening A2.
  • the second bottom portion 21 is a rectangular flat plate.
  • the thickness t2 of the second bottom portion 21 is, for example, not less than 30 mm and not more than 40 mm.
  • the second bottom portion 21 has an attachment surface 21a to which the second battery module 2b is attached and a back surface 21b on the back side of the attachment surface 21a.
  • the mounting surface 21a is exposed in the second housing portion 20.
  • the back surface 21 b is located on the first housing portion 10 side and is exposed in the first housing portion 10.
  • a total of four second battery modules 2b are attached to the attachment surface 21a by brackets, two in the X direction and two in the Y direction. The number and arrangement of the second battery modules 2b are not limited to this.
  • the pair of side wall portions 22 are rectangular flat plates facing each other in the Y direction.
  • the thickness of the pair of side wall portions 22 is, for example, 20 mm.
  • the pair of side wall portions 22 extends in the Z direction from both ends of the second bottom portion 21 in the Y direction.
  • the second bottom portion 21 and the pair of side wall portions 22 are integrally formed.
  • the 2nd bottom part 21 and a pair of side wall part 22 are separate bodies, and the 2nd accommodating part 20 may be comprised by these combination.
  • the second accommodating portion 20 is stacked on the first accommodating portion 10 so as to block the first opening A1 with the second bottom portion 21. That is, the first bottom portion 11 is disposed on the side opposite to the second housing portion 20.
  • the 2nd bottom part 21 is arrange
  • the portion where the first housing portion 10 and the second housing portion 20 abut is joined by, for example, a bolt or welding.
  • the portion of the first housing portion 10 that contacts the second housing portion 20 is an end portion of the pair of side wall portions 12 on the second housing portion 20 side.
  • the portions of the second storage portion 20 that come into contact with the first storage portion 10 are both ends of the back surface 21b of the second bottom portion 21 in the Y direction.
  • the thickness t2 of the second bottom portion 21 is thicker than the thickness t1 of the first bottom portion 11.
  • the thickness t2 of the second bottom portion 21 is, for example, 1.5 times or more the thickness t1 of the first bottom portion 11.
  • the heat capacity (thermal mass) of the first bottom portion 11 is proportional to the thickness t1 of the first bottom portion 11, and the heat capacity of the second bottom portion 21 is proportional to the thickness t2 of the second bottom portion 21.
  • the housing 4 is entirely formed of the same metal material. For this reason, the heat capacity of the second bottom portion 21 is larger than the heat capacity of the first bottom portion 11.
  • the difference between the heat capacity of the second bottom portion 21 and the heat capacity of the first bottom portion 11 is proportional to the difference between the thickness t2 of the second bottom portion 21 and the thickness t1 of the first bottom portion 11.
  • the lid 5 is a rectangular flat plate.
  • the thickness of the lid 5 is, for example, 20 mm.
  • the lid portion 5 is provided on the second accommodating portion 20 so as to close the second opening A2.
  • the first bottom portion 11, the second bottom portion 21, and the lid portion 5 are provided in this order so as to completely overlap each other.
  • the portion where the second housing portion 20 and the lid portion 5 abut is joined by, for example, a bolt or welding.
  • the portion of the second housing portion 20 that contacts the lid portion 5 is an end portion of the pair of side wall portions 22 on the lid portion 5 side.
  • the portions of the lid 5 that come into contact with the second accommodating portion 20 are both end portions in the Y direction on the surface of the lid 5 on the second accommodating portion 20 side.
  • the front wall portion 6 and the rear wall portion 7 are rectangular flat plates and have the same shape.
  • the thickness of the front wall part 6 and the rear wall part 7 is 20 mm, for example.
  • the front wall portion 6 and the rear wall portion 7 face each other in the X direction, and sandwich the first housing portion 10, the second housing portion 20, and the lid portion 5. Portions where the front wall portion 6 and the rear wall portion 7 are in contact with the first housing portion 10, the second housing portion 20, and the lid portion 5 are joined by, for example, bolts or welding.
  • 1st accommodating part 10, 2nd accommodating part 20, the cover part 5, the front wall part 6, and the rear wall part 7 are each comprised as a different body.
  • the first battery module 2a is attached to the attachment surface 11a
  • the second battery module 2b is attached to the attachment surface 21a.
  • the second housing portion 20 is stacked on the first housing portion 10 so as to close the first opening A ⁇ b> 1 of the first housing portion 10, and the second housing portion 20 is attached to the first housing portion 10.
  • the lid portion 5 is attached on the second housing portion 20 so as to close the second opening A2 of the second housing portion 20.
  • the front wall portion 6 and the rear wall portion 7 are connected to the first housing portion 10, the second housing portion 20, and the first housing portion 10, the second housing portion 20, and the lid portion 5 in the X direction. And attached to the lid 5.
  • the battery pack 1 is assembled.
  • the battery pack 1 may be assembled by other methods.
  • the battery pack 1A includes the first battery cell 3a and the second battery cell 3b, and the housing 4 that houses the first battery cell 3a and the second battery cell.
  • the 1st battery cell 3a and the 2nd battery cell 3b repeat charge and discharge by use.
  • the first battery cell 3a and the second battery cell 3b generate heat particularly during charging.
  • the 1st battery cell 3a and the 2nd battery cell 3b deteriorate with high temperature. Therefore, in order to suppress the deterioration of the first battery cell 3a and the second battery cell 3b, it is necessary to release the heat of the first battery cell 3a and the second battery cell 3b.
  • the lifetime of the battery pack 1A depends on the more deteriorated one of the first battery cell 3a and the second battery cell 3b.
  • the life of the battery pack 1A may be shortened. Therefore, in order to extend the life of the battery pack 1A, it is necessary to suppress the deterioration of one of the first battery cell 3a and the second battery cell 3b.
  • the heat generated in the first battery cell 3a of the first housing part 10 is released from the first battery cell 3a to the first bottom part 11, and then released from the first bottom part 11 to the outside of the housing 4.
  • the heat generated in the second battery cell 3b of the second housing part 20 is released from the second battery cell 3b to the second bottom portion 21.
  • Part of the heat generated in the first battery cell 3a of the first housing part 10 and the second battery cell 3b of the second housing part 20 is also released to the air in the first housing part 10 and the second housing part 20.
  • most of the generated heat is due to the difference in thermal conductivity, so that the first bottom part 11 to which the first battery cell 3a is attached in direct contact and the second battery cell 3b are attached in direct contact. Released to the bottom 21.
  • the temperature outside the casing 4 is usually lower than the temperature inside the casing 4. Therefore, compared to the first bottom portion 11 that can release heat to the outside of the housing 4, substantially the whole is located in the housing 4, and the second bottom portion 21 that can mainly release heat only inside the housing 4, Heat is not easily released. That is, the heat dissipation of the second bottom 21 is lower than the heat dissipation of the first bottom 11. Therefore, in terms of heat dissipation, the temperature of the second bottom portion 21 tends to be higher than the temperature of the first bottom portion 11.
  • the temperature of the second bottom portion 21 is higher than the temperature of the first bottom portion 11, compared to the first bottom portion 11, heat is less likely to be released from the second battery cell 3 b at the second bottom portion 21. As a result, the heat dissipation may vary between the first battery cell 3a and the second battery cell 3b.
  • the thickness t2 of the second bottom portion 21 of the second storage portion 20 is set to be thicker than the thickness t1 of the first bottom portion 11 of the first storage portion 10, whereby the second bottom portion of the second storage portion 20.
  • the heat capacity of 21 is set to be larger than the heat capacity of the first bottom part 11 of the first housing part 10.
  • the heat capacity is large, the temperature is difficult to rise. Therefore, it can suppress that the temperature of the 2nd bottom part 21 rises. Accordingly, heat is easily released from the second battery cell 3 b in the second housing portion 20 to the second bottom portion 21. Therefore, the heat dissipation with respect to the 2nd bottom part 21 of the 2nd battery cell 3b in the 2nd accommodating part 20 increases. As a result, variation between the influence of the first bottom 11 on the heat dissipation of the first battery cell 3a and the influence of the second bottom 21 on the heat dissipation of the second battery cell 3b is suppressed.
  • the thickness t1 and heat capacity of the first bottom portion 11 and the thickness t2 and heat capacity of the second bottom portion 21 are the effects of the first bottom portion 11 on the heat dissipation of the first battery cell 3a and the second battery cell 3b. It sets so that the dispersion
  • the surface of the first housing part 10 facing the first bottom part 11 forms a first opening A1
  • the second housing part 20 is placed on the first housing part 10 so as to close the first opening A1 with the second bottom part 21.
  • the 1st accommodating part 10 does not have a member which block
  • FIG. 3 is a cross-sectional view of the battery pack according to the second embodiment.
  • the battery pack 1A according to the first embodiment Only differences from the battery pack 1A according to the first embodiment will be described.
  • the thickness t ⁇ b> 2 of the second bottom portion 21 is the same as the thickness t ⁇ b> 1 of the first bottom portion 11.
  • the 1st accommodating part 10 is comprised, for example with iron.
  • the 2nd accommodating part 20 is comprised, for example with aluminum.
  • the thermal conductivity of aluminum is higher than that of iron. That is, the thermal conductivity of the second bottom portion 21 is set to be higher than the thermal conductivity of the first bottom portion 11.
  • the heat is more easily transmitted as the thermal conductivity increases. Therefore, compared with the case where the thermal conductivity of the second bottom portion 21 is set to be the same as the thermal conductivity of the first bottom portion 11, in the battery pack 1B, the heat of the second battery cell 3b is changed to the second bottom portion 21. It becomes easy to discharge
  • the thermal conductivity of the first bottom portion 11 and the thermal conductivity of the second bottom portion 21 are the effects of the first bottom portion 11 on the heat dissipation performance of the first battery cell 3a and the heat dissipation performance of the second battery cell 3b. 2 is set so as to suppress variation between the influence of the bottom 21. As a result, also in the battery pack 1B, it is possible to suppress variation in heat dissipation between the first battery cell 3a and the second battery cell 3b.
  • FIG. 4 is a cross-sectional view of the battery pack according to the third embodiment.
  • FIG. 4 is a cross-sectional view of the battery pack according to the third embodiment.
  • a plurality of recesses 23 are provided on the back surface 21 b of the second bottom portion 21.
  • Each recess 23 has a shape recessed toward the mounting surface 21a. That is, the distance between the bottom of each recess 23 and the mounting surface 21a is shorter than the distance between the portion of the back surface 21b other than the recess 23 and the mounting surface 21a.
  • the surface area of the back surface 21b of the second bottom portion 21 is increased, and heat is easily released from the second bottom portion 21 to the first housing portion 10. Therefore, the rise in the temperature of the second bottom portion 21 is further suppressed, and the heat dissipation performance for the second bottom portion 21 of the second battery cell 3b can be further enhanced.
  • the variation between the influence of the first bottom 11 on the heat dissipation of the first battery cell 3a and the influence of the second bottom 21 on the heat dissipation of the second battery cell 3b is further suppressed. .
  • FIG. 5 is a cross-sectional view of the battery pack according to the fourth embodiment.
  • FIG. 5 is a cross-sectional view of the battery pack according to the fourth embodiment.
  • the second bottom portion 21 has a convex portion 24 fitted in the first opening A ⁇ b> 1 on the back surface 21 b.
  • the 2nd accommodating part 20 is stacked on the 1st accommodating part 10 in the state which the convex part 24 fitted to 1st opening A1.
  • the second bottom portion 21 has the convex portion 24 on the back surface 21b. Therefore, the heat capacity of the second bottom portion 21 can be increased by an amount corresponding to the volume of the convex portion 24. Thereby, the temperature rise of the 2nd bottom part 21 is further suppressed. Therefore, the heat dissipation of the second battery cell 3b with respect to the second bottom portion 21 can be further enhanced. As a result, it is possible to further suppress the variation in heat dissipation between the first battery cell 3a and the second battery cell 3b.
  • the positioning between the first housing portion 10 and the second housing portion 20 is easy by using the convex portion 24. Can be done. Therefore, workability in assembling the battery pack 1D can be improved.
  • the battery pack according to the present invention is not limited to the above embodiment.
  • the battery pack 1A to the battery pack 1D are sequentially stacked between the first housing portion 10 and the lid portion 5 along the direction in which the first housing portion 10 and the lid portion 5 face each other (Z direction).
  • a plurality of second accommodating portions 20 may be provided.
  • the first storage unit 10 and the second storage unit 20 may be made of different metal materials instead of the same metal material.
  • each metal material may be selected such that the thermal conductivity of the second storage unit 20 is higher than the thermal conductivity of the first storage unit 10.
  • each metal material may be selected so that the specific heat capacity of the second storage unit 20 is higher than the specific heat capacity of the first storage unit 10.
  • the first housing portion 10, the second housing portion 20, the lid portion 5, the front wall portion 6 and the rear wall portion 7 are not separate bodies, and two or more of them are integrated. It may be made.
  • the first storage unit 10 may store the first battery cell 3a and the second storage unit 20 may store the second battery cell 3b.
  • the first battery cell 3a may be attached to a location other than the attachment surface 11a of the first bottom portion 11, or the second battery cell 3b may be attached to a location other than the attachment surface 21a of the second bottom portion 21.
  • the 1st battery cell 3a is attached to the side wall part 12 and the 2nd battery cell 3b is attached to the side wall part 22, the 1st battery cell 3a of the 1st bottom part 11 from the side wall part 12 is attached. While heat is transmitted, heat of the second battery cell 3 b is transmitted from the side wall portion 22 to the second bottom portion 21.
  • the thermal conductivity of the second bottom portion 21 may be set higher than the thermal conductivity of the first bottom portion 11.
  • the thermal conductivity of the pair of sidewall portions 22 may be the same as the thermal conductivity of the pair of sidewall portions 12, and the thermal capacity of the pair of sidewall portions 22 may be the same as the thermal capacity of the pair of sidewall portions 12.
  • the first housing portion 10 may have a lid portion that faces the first bottom portion 11.
  • the lid portion can be a rectangular flat plate, for example. By using such a lid portion together with the second bottom portion 21, the heat dissipation of the second battery cell 3b can be enhanced.
  • the thickness of the lid portion can be adjusted as appropriate so that the heat capacities of the second bottom portion 21 and the lid portion have desired values.
  • the lid may be a thin plate that does not substantially contribute to the improvement of heat dissipation of the second battery cell 3b.
  • the surface area of the back surface 21b may be increased by providing a plurality of convex portions protruding toward the first housing portion 10 instead of the plurality of concave portions 23.
  • the convex portion is provided, the volume of the second bottom portion 21 is increased as compared with the case where the concave portion 23 is provided. Therefore, the heat capacity of the second bottom portion 21 can be further increased.
  • the second accommodating portion 20 is easier to handle than when the convex portion is provided.
  • SYMBOLS 1A-1D ... Battery pack, 2a ... 1st battery module, 2b ... 2nd battery module, 3a ... 1st battery cell, 3b ... 2nd battery cell, 4 ... housing
  • casing 10 ... 1st accommodating part, 11 ... 1st DESCRIPTION OF SYMBOLS 1 bottom part, 20 ... 2nd accommodating part, 11 ... 1st bottom part, 21b ... Back surface, 23 ... Recessed part, 24 ... Convex part, A1 ... 1st opening, A2 ... 2nd opening, t1, t2 ... Thickness.

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  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • General Physics & Mathematics (AREA)
  • Algebra (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)

Abstract

L'invention porte sur un bloc-batterie qui est pourvu : d'un premier élément de batterie et d'un second élément de batterie ; et d'un boîtier pour loger le premier élément de batterie et le second élément de batterie. Le boîtier est pourvu : d'une première section de boîtier, qui comporte une première section inférieure, et qui loge le premier élément de batterie ; et d'une seconde section de boîtier, qui comporte une seconde section inférieure, et qui loge le second élément de batterie. La seconde section de boîtier est empilée sur la première section de boîtier. La première section inférieure est disposée du côté opposé à la seconde section de boîtier, et la seconde section inférieure est disposée du côté de la première section de boîtier. La capacité thermique de la seconde section inférieure est plus grande que la capacité thermique de la première section inférieure.
PCT/JP2016/067559 2015-08-18 2016-06-13 Bloc-batterie WO2017029865A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015160961A JP6464958B2 (ja) 2015-08-18 2015-08-18 電池パック
JP2015-160961 2015-08-18

Publications (1)

Publication Number Publication Date
WO2017029865A1 true WO2017029865A1 (fr) 2017-02-23

Family

ID=58050778

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/067559 WO2017029865A1 (fr) 2015-08-18 2016-06-13 Bloc-batterie

Country Status (2)

Country Link
JP (1) JP6464958B2 (fr)
WO (1) WO2017029865A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11575164B2 (en) * 2017-05-22 2023-02-07 Bayerische Motoren Werke Aktiengesellschaft Storage device for storing electrical energy, in particular for a motor vehicle, and motor vehicle

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01134851A (ja) * 1987-11-19 1989-05-26 Yuasa Battery Co Ltd 集合電池
JP2014149992A (ja) * 2013-02-01 2014-08-21 Toyota Industries Corp 電池パック
JP2015115167A (ja) * 2013-12-11 2015-06-22 株式会社東芝 発熱体収容装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01134851A (ja) * 1987-11-19 1989-05-26 Yuasa Battery Co Ltd 集合電池
JP2014149992A (ja) * 2013-02-01 2014-08-21 Toyota Industries Corp 電池パック
JP2015115167A (ja) * 2013-12-11 2015-06-22 株式会社東芝 発熱体収容装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11575164B2 (en) * 2017-05-22 2023-02-07 Bayerische Motoren Werke Aktiengesellschaft Storage device for storing electrical energy, in particular for a motor vehicle, and motor vehicle

Also Published As

Publication number Publication date
JP2017041317A (ja) 2017-02-23
JP6464958B2 (ja) 2019-02-06

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