WO2020031467A1 - Battery holder, battery pack, electronic device and electric vehicle - Google Patents

Battery holder, battery pack, electronic device and electric vehicle Download PDF

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Publication number
WO2020031467A1
WO2020031467A1 PCT/JP2019/021088 JP2019021088W WO2020031467A1 WO 2020031467 A1 WO2020031467 A1 WO 2020031467A1 JP 2019021088 W JP2019021088 W JP 2019021088W WO 2020031467 A1 WO2020031467 A1 WO 2020031467A1
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WO
WIPO (PCT)
Prior art keywords
battery
battery holder
slit
holder
housing
Prior art date
Application number
PCT/JP2019/021088
Other languages
French (fr)
Japanese (ja)
Inventor
喜幸 坂内
Original Assignee
株式会社村田製作所
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 株式会社村田製作所 filed Critical 株式会社村田製作所
Priority to CN201980051894.8A priority Critical patent/CN112534627B/en
Priority to JP2020536342A priority patent/JP7063385B2/en
Publication of WO2020031467A1 publication Critical patent/WO2020031467A1/en

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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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/293—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by the material
    • 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
    • H01M10/62—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
    • H01M10/643—Cylindrical 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
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
    • 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
    • H01M10/6595—Means for temperature control structurally associated with the cells by chemical reactions other than electrochemical reactions of the cells, e.g. catalytic heaters or burners
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
    • 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 holder, a battery pack, an electronic device, and an electric vehicle.
  • a lithium ion battery is known as a battery whose use is expanding not only in electric equipment but also in automobiles and the like. While the lithium ion battery has a high output, the lithium ion battery may generate abnormal heat due to a short circuit or the like generated inside the lithium ion battery cell due to some accident. For this reason, various researches and developments on the safety of lithium ion batteries have been conducted.
  • Patent Document 1 describes a battery module in which a battery holder is made of a thermally conductive material and a heat absorbing agent is provided in a gap generated when a lithium ion battery cell is inserted into the battery holder.
  • a certain lithium ion battery cell when a certain lithium ion battery cell generates abnormal heat, the heat is absorbed by the surrounding heat absorbing agent, and the heat that cannot be absorbed is diffused to the battery holder, thereby causing an abnormal heat generation. Further, the temperature of the lithium ion battery cell is prevented from rising.
  • an object of the present invention is to provide a battery holder, a battery pack, an electronic device, and an electric vehicle that can effectively cool a battery such as a lithium ion battery even when the battery abnormally generates heat. I do.
  • the present invention for example, It is composed of an elastic body kneaded with a substance exhibiting a dehydration endothermic reaction, It has a battery storage section in which batteries are stored, This is a battery holder in which a slit is formed on the surface of the battery housing.
  • the present invention for example, The battery holder described above, A battery housed in a battery housing part of the battery holder, A battery pack comprising: a housing for accommodating a battery holder.
  • the present invention may be an electronic device having the above-described battery pack.
  • the present invention may be an electric vehicle including the above-described battery pack.
  • the battery can be effectively cooled.
  • the effects of the present invention are not to be construed as limiting the contents of the present invention.
  • FIG. 1 is an exploded perspective view illustrating a configuration example of a battery pack according to an embodiment.
  • FIG. 2 is an exploded perspective view for explaining a configuration example of the battery holder according to the embodiment.
  • FIG. 3 is a diagram for explaining a configuration example of the battery holder according to the embodiment.
  • FIG. 4 is a diagram referred to as a comparative example when describing effects obtained by the embodiment.
  • FIG. 5 is a diagram referred to when describing effects obtained by the embodiment.
  • FIG. 6 is a diagram for explaining a modification.
  • FIG. 7 is a diagram for explaining an application example.
  • FIG. 8 is a diagram for explaining an application example.
  • a cylindrical lithium ion secondary battery cell will be described as an example of a battery.
  • batteries other than the lithium ion secondary battery and batteries other than the cylindrical shape may be used.
  • the battery pack has one or more lithium ion battery cells.
  • the same or similar components, processes, and the like are denoted by the same reference numerals, and duplicate description will be omitted as appropriate. Further, in order to prevent the illustration from being complicated, reference numerals may be given to only some of the components.
  • FIG. 1 is an exploded perspective view illustrating a configuration example of a battery pack (battery pack 1) according to an embodiment.
  • the battery pack 1 has a battery holder 2 for housing and holding a battery (battery 5), and a case 3 as a housing for housing the battery holder 2 therein.
  • the case 3 is, for example, vertically separable into an upper case 3a and a lower case 3b. For example, after the battery holder 2 is stored at a predetermined position of the lower case 3b, the battery holder 2 is stored inside the case 3 by engaging the upper case 3a and the lower case 3b.
  • the case 3 is preferably made of a material having high thermal conductivity and emissivity. Thereby, excellent heat dissipation can be obtained, and a rise in temperature in the case 3 can be suppressed.
  • Examples of the material of the case 3 include aluminum, an aluminum alloy, copper, and a copper alloy.
  • the outer peripheral surface (outer surface) of the battery holder 2 and the inner surface of the case 3 come into close contact with each other.
  • the close contact in the present specification does not necessarily mean that all of the outer peripheral surface of the battery holder 2 and all of the inner surface of the case 3 are in contact with each other, and includes a case in which the battery holder 2 is provided adjacently via a gap.
  • the outer peripheral surface of the battery holder 2 and the inner surface of the case 3 are in contact with each other to such an extent that a space for connecting tabs to the positive electrode and the negative electrode of the battery 5 and a space for leading a lead wire are secured. Is included in the close contact in this specification.
  • the battery holder 2 is, for example, separable into a first battery holder 2a and a second battery holder 2b in a direction substantially orthogonal to a direction in which the case 3 can be separated.
  • the battery 5 is housed and held by engaging the first battery holder 2a and the second battery holder 2b.
  • the battery holder 2 has a plurality of hollow cylindrical battery housing portions 11 for housing and holding one or a plurality of batteries 5. Circular holes 7 are formed at both ends of the battery housing 11, and the electrodes of each battery are exposed from the battery holder 2 through the holes 7 when the batteries 5 are inserted. I have. A tab (not shown) or the like is appropriately connected to the electrode of the battery 5 exposed through the hole 7.
  • the battery storage units 11 are arranged in two rows and four rows, and can store eight batteries.
  • adjacent batteries housed in the same stage are arranged so that the directions of the positive electrode surface and the negative electrode surface are alternated.
  • the battery housing portions 11 are provided at a predetermined interval from each other, and can insulate the stored batteries 5 from each other.
  • the first battery holder 2a and the second battery holder 2b each have a battery storage section formed in two rows and four rows.
  • a hollow cylindrical first battery storage portion 11a is formed at a predetermined position of the first battery holder 2a, and a hollow cylindrical shape is formed at a position corresponding to the first battery storage portion 11a of the second battery holder 2b.
  • a second battery storage part 11b is formed.
  • a plurality of slits are formed on the surface of the battery housing 11.
  • a slit 15 is formed on the surface of the battery housing 11 so as to extend from one open end of the battery housing 11 to the other open end substantially in parallel with the axial direction of the battery 5.
  • a first slit 15a is formed on the surface of the first battery housing 11a
  • a second slit 15b is formed on the surface of the second battery housing 11b.
  • a linear slit 15 is formed by the predetermined first slit 15a and the corresponding second slit 15b.
  • the surface of the battery storage unit refers to the surface of the battery storage unit that is in contact with the battery.
  • the axial direction refers to the central axis of the battery, for example, in the case of a cylindrical battery, a direction connecting the center of the positive terminal and the center of the negative terminal.
  • the width of the slit 15 is, for example, 0.5 mm or less, and the depth of the slit 15 is, for example, about 1 to 2 mm.
  • the depth direction of the slit 15 is, for example, a direction along the radial direction of the battery 5, in other words, a radiation direction radiating outward from the center of the end face of the circular battery 5. More specifically, the depth direction of the predetermined slit 15 is, for example, a predetermined radial direction of the battery 5, in other words, a predetermined one of radiation directions radiating outward from the center of the end face of the circular battery 5. This direction is substantially parallel to the direction.
  • the slit 15 can be formed by an appropriate method.
  • the slit 15 can be formed by transferring a shape corresponding to the slit 15 formed in the mold.
  • the slit 15 may be formed by making a cut in the battery holder 2 with a laser, a cutter, water pressure, or the like.
  • Battery holder 2 is formed of an elastic body containing an elastic material having thermal conductivity.
  • an elastic material for example, a synthetic rubber such as silicone rubber, ethylene propylene rubber (EPDM), or fluoro rubber (FKM) having electrical insulation properties, or a thermoplastic elastomer resin can be used.
  • the elastic body constituting the battery holder 2 is kneaded with a heat-absorbing substance, more specifically, a substance capable of dehydrating and absorbing heat (hereinafter, appropriately referred to as a dehydrating heat-absorbing substance).
  • a dehydrating heat-absorbing substance a substance capable of dehydrating and absorbing heat.
  • aluminum hydroxide is used as such a dehydration endothermic substance.
  • the battery holder 2 is assembled, for example, as follows. First, one end side of a predetermined battery 5 is inserted into the first battery storage portion 11a of the first battery holder 2a. Other batteries 5 are inserted similarly. After that, the other end of the predetermined battery 5 is inserted into the second battery holder 11b of the second battery holder 2b. Other batteries 5 are inserted similarly. The first battery holder 2a and the second battery holder 2b are engaged with each other, and the first battery holder 2a and the second battery holder 2b are fixed by an appropriate method such as fastening with a screw. Thereby, the battery holder 2 is assembled, and the battery 5 is stored and held by the battery holder 2.
  • the battery 5 may be inserted into the battery compartment of the second battery holder 2b, or the battery 5 may be inserted into each of the battery compartment of the first battery holder 2a and the battery compartment of the second battery holder 2b. They may be inserted at the same time.
  • the water generated by the dehydration and endothermic reaction of aluminum hydroxide evaporates due to the temperature of the battery 5 that has abnormally generated heat.
  • the battery 5 that has abnormally generated heat due to the heat of vaporization of water can be cooled.
  • the aluminum hydroxide may release water of crystallization (water vapor) when exhibiting a dehydration / endothermic reaction. 5 can be cooled. Note that the water vapor is appropriately released to the outside of the battery pack 1 through the slit 15 and the hole 7 of the battery holder 2, for example.
  • the dehydration endothermic substance is kneaded in the entire battery holder 2. Therefore, the battery 5 that has abnormally generated heat can be effectively cooled, and the heat of the battery 5 that has generated abnormally much heat can be suppressed from being transmitted to an adjacent battery or the like.
  • the slit 15 is formed on the surface of the battery housing 11 that contacts the peripheral surface of the battery 5.
  • the surface area of the surface of the battery housing 11 can be increased. Therefore, the area for dehydration (the area from which water is extracted) when the battery holder 2 performs dehydration and heat absorption can be increased, and the heat absorbing effect can be improved.
  • the surface area of the surface of the battery housing 11 can be increased by forming a slit 15 having a small width of, for example, 0.5 mm or less on the surface of the battery housing 11. Further, since the width of the slit 15 is minute, the contact area between the surface of the battery housing 11 and the peripheral surface of the battery 5 decreases as the holding power of the battery 5 by the battery housing 11 decreases. Can be prevented.
  • the diameter of the battery storage portion in a state where no battery is stored is often designed to be equal to or slightly smaller than the diameter of the battery. This is because when the battery is pressed into the battery housing, the surface of the battery housing is slightly compressed and closely attached to the battery because the battery holder has elasticity. Also in the present embodiment, the diameter of the battery housing 11 in a state where the battery 5 is not housed is set to be equal to or smaller than the diameter of the battery 5.
  • the depth direction of the slit 15 is, for example, the radial direction of the battery 5, in other words, the radiation direction radiating outward from the center of the end surface of the circular battery 5.
  • the slit 15 is moved by a force directed outward of the battery housing 11 (a force directed in a direction indicated by an arrow in the figure). Can be prevented from being crushed. Therefore, it is possible to prevent inconvenience caused by the slit 15 being crushed, for example, a decrease in endothermic effect and a blockage of a discharge path of water vapor generated during a dehydration endothermic reaction.
  • case 3 is made of a material having excellent heat dissipation properties. Therefore, even when the battery 5 stored in the battery holder 2 generates abnormal heat, the heat can be easily discharged to the outside via the battery holder 2 and the case 3.
  • the battery holder is brought into close contact with the positive electrode, which has the effect of preventing water from entering the positive electrode. Since the impact due to the external force can be absorbed by the battery holder 2 which is an elastic body, there is an effect that the impact resistance such as dropping is improved. Further, since the battery holder 2 has a dehydrating heat absorbing action, a heat conducting member for releasing heat to the outside can be eliminated.
  • the present invention will be specifically described based on an example in which a battery holder obtained by kneading aluminum hydroxide in rubber or an elastomer is used to compare the difference in cooling performance depending on the presence or absence of a slit in a battery housing.
  • the present invention is not limited to the embodiments described below.
  • Example 1 As the battery holder, a battery holder having a shape shown in FIG. 2 was used. Sixteen slits were formed on the surface of the battery holder of the battery holder at substantially equal intervals along the axial direction of the battery for one battery. The depth of the slit was about 1.5 mm.
  • Example 2 As the battery holder, a battery holder having a shape shown in FIG. 2 was used. Twenty-seven slits were formed on the surface of the battery housing of the battery holder at substantially equal intervals along the axial direction of the battery for one battery. The depth of the slit was about 1.5 mm.
  • Examples 1 and 2 and Comparative Example a battery holder having a battery storage part having a diameter of 18 mm and a length along the axial direction of 65 mm was used.
  • the battery holder described above was evaluated. The evaluation was performed by changing the number of slits to change the dehydration and heat absorption effective area of the battery holder. In addition, one battery in the battery holder was abnormally heated. Then, in order to evaluate how much aluminum hydroxide (converted to alumina after the dehydration endothermic reaction) contributes to the cooling of the battery that generated abnormal heat, the temperature of the battery adjacent to the battery that generated abnormal heat was increased from the maximum temperature to 100 ° C. The time (seconds) required to go down was measured. Further, the presence or absence of fire spread of the battery adjacent to the battery that caused abnormal heat generation was observed. The results are shown in Table 1 below.
  • the battery adjacent to the battery that caused abnormal heat generation did not spread, whereas the comparative example did.
  • the maximum temperature of the battery that generated abnormal heat was about 600 ° C.
  • the maximum temperature of the battery adjacent to the battery that abnormally heated was about 300 ° C. to 400 ° C.
  • the time required for the temperature of the battery adjacent to the abnormally heated battery to decrease from the maximum temperature to 100 ° C. was 1070 seconds in Example 1 and 980 seconds in Example 2.
  • FIG. 6 is a diagram for explaining a modification.
  • the battery holder 2 may be separable in the vertical direction.
  • the battery holder 2 has a battery support 25 housed in the first and second battery holders 2a and 2b.
  • Semicircular concave portions 26 are formed in the upper and lower four rows of the battery support 25.
  • batteries 5 are respectively stored in four semicircular recesses formed in the second battery holder 2b. Then, the concave portion 26 on the lower side of the battery support 25 is put on the upper half of the battery 5. The four batteries 5 are housed in the concave portion 26 on the upper side of the battery support 25. The eight batteries 5 are housed in the battery holder 2 by engaging the first battery holder 2a with the second battery holder 2b.
  • a slit 15 is formed in at least a surface of the first and second battery holders 2a and 2b and the battery support 25 that comes into contact with the peripheral surface of the battery 5. Specifically, a first slit 15a is formed on the surface of the first battery holder 2a, a second slit 15b is formed on the surface of the second battery holder 2b, and a third slit 15c is formed on the surface of the battery support 25. Is done.
  • Each slit may be the same slit as in the embodiment, but the first, second, and third slits 15a, 15b, and 15c in this example are formed along the circumferential direction of the battery 5.
  • the shape of the slit 15 is not limited to the shape described in the embodiment.
  • the slits 15 may be formed in a lattice shape combining the circumferential direction and the axial direction of the battery.
  • the number of slits 15 can be increased, and the dehydration and heat absorption effect can be improved.
  • one or a plurality of slits 15 may be formed along a spiral shape like a female screw groove.
  • the number of the slits 15 is appropriately set in consideration of the viewpoint of increasing the dehydration endothermic effective area, the easiness of processing for forming the slits 15, and the like.
  • the number of battery cells that can be stored in the battery holder is not limited to eight, and may be seven or less or nine or more, and the number of battery storage units corresponding to the number may be sufficient.
  • the material of the battery holder is rubber or elastomer, any material may be used as long as it is an elastic body.
  • the shapes of the battery housing and the battery cells are cylindrical, they may be square or thin.
  • magnesium hydroxide magnesium sulfate heptahydrate, calcium hydroxide, zeolite, and the like.
  • any substance that exhibits a dehydration endothermic reaction may be used.
  • the dehydration endothermic reaction has been described as an example of the reaction of a substance that absorbs heat, other examples include a dehydrogenation endothermic reaction, a decarboxylation endothermic reaction, a denitrification endothermic reaction, and a deoxygenating endothermic reaction. Any substance exhibiting any reaction may be used as long as it is an endothermic substance.
  • An elastic body having a slit formed by kneading a dehydration endothermic substance may be provided in a protective member on the surface of the battery or a predetermined layer inside the laminate type battery. According to such a configuration, the impact resistance of the battery can be improved, and the battery can be effectively cooled when the battery generates abnormal heat. Further, an elastic body in which a dehydration heat absorbing substance is kneaded and a slit is formed may be used for a connection member or the like for connecting the battery to a substrate or the like.
  • a cylindrical lithium ion secondary battery has been described as an example, but in addition to this, any battery such as a sodium ion battery, an aluminum ion battery, a magnesium ion battery, a nickel metal hydride battery, and a lead battery can be used. (Regardless of whether the battery is a secondary battery or a primary battery). Further, the battery is not limited to the cylindrical shape, and batteries of other shapes such as a square battery and a polygonal battery may be applied without departing from the spirit of the invention.
  • FIG. 7 illustrates a configuration example of the electronic device 1601.
  • the electronic device 1601 in this example is, for example, a personal computer.
  • the electronic device 1601 includes a controller IC 1615, a sensor 1620, a host device 1616 that controls the electronic device 1601 overall, a display device 1612, and a battery pack 1617 as a power supply.
  • Sensor 1620 may include controller IC 1615.
  • the sensor 1620 is, for example, a camera that can photograph a user.
  • the sensor 1620 may measure biological information of the user or an environment (temperature, humidity, and the like) around the electronic device 1601.
  • the sensor 1620 outputs the detected output signal to the controller IC 1615.
  • the controller IC 1615 executes various controls based on an output signal from the sensor 1620.
  • the host device 1616 executes various processes based on information supplied from the controller IC 1615. For example, processing such as display of character information or image information on the display device 1612, movement of a cursor displayed on the display device 1612, scrolling of a screen, and the like are executed.
  • the display device 1612 is, for example, a flexible display device, and displays a screen based on a video signal, a control signal, and the like supplied from the host device 1616.
  • Examples of the display device 1612 include, but are not limited to, a liquid crystal display, an electro-luminescence (Electro Luminescence: EL) display, electronic paper, and the like.
  • the battery pack 1617 is a battery pack according to the above-described embodiment or a modification thereof.
  • the battery pack according to the embodiment or the modified example can be applied as a battery pack included in an electronic device.
  • the present invention is applicable to various electronic devices provided with a battery, and is not limited to the electronic device 1601 described in the above application example.
  • electronic devices other than the above-described application examples include a notebook personal computer, a tablet computer, a mobile phone (for example, a smartphone), a personal digital assistant (Personal Digital Assistants: PDA), a display device (LCD, EL display, electronic device).
  • Imaging devices eg, digital still cameras, digital video cameras, etc.
  • audio devices eg, portable audio players
  • game devices universal credit cards
  • sensor network terminals smart watches, glasses-type terminals (head-mounted displays (HMDs) ), Cordless phone cordless handset, electronic book, electronic dictionary, radio, headphones, navigation system, memory card, pacemaker, hearing aid, electric tools such as electric driver and chainsaw, electric Electric flying objects such as shavers and drones, refrigerators, air conditioners, televisions, stereos, water heaters, microwave ovens, dishwashers, washing machines, dryers, lighting equipment, toys, medical equipment, robots, road conditioners, traffic lights, other than those illustrated Mobile devices (for example, wearable devices that can be attached to and detached from the human body) and the like, but are not limited thereto.
  • HMDs head-mounted displays
  • FIG. 8 schematically shows a configuration of a hybrid vehicle employing a series hybrid system to which the present invention is applied.
  • the series hybrid system is a vehicle that runs on a power driving force conversion device using electric power generated by a generator driven by an engine or electric power once stored in a battery.
  • the hybrid vehicle 7200 includes an engine 7201, a generator 7202, a power driving force conversion device 7203, a driving wheel 7204a, a driving wheel 7204b, a wheel 7205a, a wheel 7205b, a power storage device 7208, a vehicle control device 7209, various sensors 7210, a charging port. 7211 is mounted.
  • the power storage device 7208 includes the battery pack according to any of the above-described embodiment and its modifications.
  • the hybrid vehicle 7200 runs using the power driving force conversion device 7203 as a power source.
  • An example of the power driving force conversion device 7203 is a motor.
  • the power of the power storage device 7208 activates the power driving force conversion device 7203, and the rotational force of the power driving force conversion device 7203 is transmitted to the driving wheels 7204a and 7204b.
  • DC-AC conversion DC-AC conversion
  • AC-DC conversion inverse conversion
  • the power driving force conversion device 7203 can be applied to either an AC motor or a DC motor.
  • the various sensors 7210 control the engine speed via the vehicle control device 7209 and control the opening of a throttle valve (not shown) (throttle opening).
  • the various sensors 7210 include a speed sensor, an acceleration sensor, an engine speed sensor, and the like.
  • the torque of the engine 7201 is transmitted to the generator 7202, and the power generated by the generator 7202 can be stored in the power storage device 7208 by the torque.
  • the power storage device 7208 can be connected to a power supply external to the hybrid vehicle, receive power from the external power supply using the charging port 7211 as an input port, and store the received power.
  • an information processing device that performs information processing on vehicle control based on information on the secondary battery may be provided.
  • an information processing apparatus for example, there is an information processing apparatus that displays the remaining battery level based on information regarding the remaining battery level.
  • the present invention can be effectively applied to a parallel hybrid vehicle in which the output of both the engine and the motor is used as a drive source, and the three modes of running only with the engine, running only with the motor, and running with the engine and the motor are appropriately switched and used. Applicable. Further, the present invention can be effectively applied to a so-called electric vehicle that travels only by a drive motor without using an engine.
  • the example of the hybrid vehicle 7200 to which the technology according to the present invention can be applied has been described above.
  • the technology according to the present invention can be suitably applied to the power storage device 7208 among the configurations described above.
  • the present invention can be applied to an electric vehicle other than the hybrid vehicle described above, specifically, an electric bicycle, an electric tricycle, an electric cart, and the like.

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Abstract

The present invention is a battery holder that is configured from an elastic body into which a substance that undergoes a dehydration endothermic reaction is kneaded. This battery holder has a battery container part in which a battery is contained; and the surface of the battery container part is provided with a slit.

Description

電池ホルダ、電池パック、電子機器及び電動車両Battery holder, battery pack, electronic device and electric vehicle
　本発明は、電池ホルダ、電池パック、電子機器及び電動車両に関する。 The present invention relates to a battery holder, a battery pack, an electronic device, and an electric vehicle.
　電気機器に限らず、自動車等にも用途が拡大しつつある電池として、リチウムイオン電池が知られている。リチウムイオン電池は高出力である一方、何らかのアクシデントによりリチウムイオン電池セル内部で発生した短絡等により、リチウムイオン電池が異常発熱する虞がある。このため、リチウムイオン電池の安全性に対する様々な研究開発が行われている。 リ チ ウ ム A lithium ion battery is known as a battery whose use is expanding not only in electric equipment but also in automobiles and the like. While the lithium ion battery has a high output, the lithium ion battery may generate abnormal heat due to a short circuit or the like generated inside the lithium ion battery cell due to some accident. For this reason, various researches and developments on the safety of lithium ion batteries have been conducted.
　例えば、特許文献１には、電池ホルダを熱伝導性の材料で作製し、リチウムイオン電池セルを電池ホルダに挿入した際に生じる隙間に吸熱剤を設けた電池モジュールが記載されている。特許文献１に記載の技術では、あるリチウムイオン電池セルが異常発熱した場合に、その熱を周囲の吸熱剤が吸熱し、吸熱しきれなかった熱を電池ホルダに熱拡散することで、異常なリチウムイオン電池セルの更なる温度上昇を抑制するようにしている。 For example, Patent Document 1 describes a battery module in which a battery holder is made of a thermally conductive material and a heat absorbing agent is provided in a gap generated when a lithium ion battery cell is inserted into the battery holder. In the technology described in Patent Document 1, when a certain lithium ion battery cell generates abnormal heat, the heat is absorbed by the surrounding heat absorbing agent, and the heat that cannot be absorbed is diffused to the battery holder, thereby causing an abnormal heat generation. Further, the temperature of the lithium ion battery cell is prevented from rising.
特開２０１２－１１９１３７号公報JP 2012-119137 A
　しかしながら、特許文献１に記載の技術では、吸熱剤が電池ホルダの表面にしか存在せず、吸熱剤の量が僅かであるため、リチウムイオン電池が異常発熱した場合に吸熱剤により吸収される熱量が少なく、異常発熱したリチウムイオン電池を十分に冷却することができないという問題があった。そして、異常発熱したリチウムイオン電池の高温の熱が、当該リチウムイオン電池に隣接する他のリチウムイオン電池に伝搬してしまうという問題があった。 However, in the technology described in Patent Document 1, since the heat absorbing agent is present only on the surface of the battery holder and the amount of the heat absorbing agent is small, the heat absorbed by the heat absorbing agent when the lithium ion battery generates abnormal heat. However, there has been a problem that the lithium ion battery that has generated abnormal heat cannot be sufficiently cooled. Then, there has been a problem that the high-temperature heat of the lithium ion battery that has abnormally generated heat propagates to another lithium ion battery adjacent to the lithium ion battery.
　従って、本発明は、リチウムイオン電池等の電池が異常発熱した場合でも、当該電池を効果的に冷却することができる電池ホルダ、電池パック、電子機器及び電動車両を提供することを目的の一つとする。 Therefore, an object of the present invention is to provide a battery holder, a battery pack, an electronic device, and an electric vehicle that can effectively cool a battery such as a lithium ion battery even when the battery abnormally generates heat. I do.
　本発明は、例えば、
　脱水吸熱反応を呈する物質を混練した弾性体により構成され、
　電池が収納される電池収納部を有し、
　電池収納部の表面にスリットが形成されている電池ホルダである。 The present invention, for example,
It is composed of an elastic body kneaded with a substance exhibiting a dehydration endothermic reaction,
It has a battery storage section in which batteries are stored,
This is a battery holder in which a slit is formed on the surface of the battery housing.
　また、本発明は、例えば、
　上述した電池ホルダと、
　電池ホルダが有する電池収納部に収納される電池と、
　電池ホルダを収納する筐体部と
　を有する電池パックである。
　本発明は、上述した電池パックを有する電子機器でも良い。
　本発明は、上述した電池パックを有する電動車両でも良い。 Also, the present invention, for example,
The battery holder described above,
A battery housed in a battery housing part of the battery holder,
A battery pack comprising: a housing for accommodating a battery holder.
The present invention may be an electronic device having the above-described battery pack.
The present invention may be an electric vehicle including the above-described battery pack.
　本発明の少なくとも実施の形態によれば、リチウムイオン電池等の電池が異常発熱した場合でも、当該電池を効果的に冷却することができる。なお、本明細書で例示された効果により本発明の内容が限定して解釈されるものではない。 According to at least the embodiment of the present invention, even when a battery such as a lithium ion battery generates abnormal heat, the battery can be effectively cooled. Note that the effects of the present invention are not to be construed as limiting the contents of the present invention.
図１は、実施の形態に係る電池パックの構成例を説明するための分解斜視図である。FIG. 1 is an exploded perspective view illustrating a configuration example of a battery pack according to an embodiment. 図２は、実施の形態に係る電池ホルダの構成例を説明するための分解斜視図である。FIG. 2 is an exploded perspective view for explaining a configuration example of the battery holder according to the embodiment. 図３は、実施の形態に係る電池ホルダの構成例を説明するための図である。FIG. 3 is a diagram for explaining a configuration example of the battery holder according to the embodiment. 図４は、実施の形態により得られる効果を説明する際の比較例として参照される図である。FIG. 4 is a diagram referred to as a comparative example when describing effects obtained by the embodiment. 図５は、実施の形態により得られる効果を説明する際に参照される図である。FIG. 5 is a diagram referred to when describing effects obtained by the embodiment. 図６は、変形例を説明するための図である。FIG. 6 is a diagram for explaining a modification. 図７は、応用例を説明するための図である。FIG. 7 is a diagram for explaining an application example. 図８は、応用例を説明するための図である。FIG. 8 is a diagram for explaining an application example.
　以下、本発明の実施の形態等について図面を参照しながら説明する。なお、説明は以下の順序で行う。
＜実施の形態＞
＜変形例＞
＜応用例＞
　以下に説明する実施の形態等は本発明の好適な具体例であり、本発明の内容がこれらの実施の形態等に限定されるものではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. The description will be made in the following order.
<Embodiment>
<Modification>
<Application example>
The embodiments and the like described below are preferred specific examples of the present invention, and the content of the present invention is not limited to these embodiments and the like.
　本発明の実施の形態では、電池の一例として、円筒形状のリチウムイオン二次電池セルを例にして説明する。勿論、リチウムイオン二次電池以外の他の電池や円筒形状以外の電池が用いられても良い。電池パックは、１又は複数のリチウムイオン電池セルを有している。なお、以下の説明では、同一、同質の構成、処理等に対しては同一の参照符号を付し、重複した説明を適宜、省略する。また、図示が煩雑となることを防止するために、一部の構成にのみ参照符号を付す場合がある。 In the embodiment of the present invention, a cylindrical lithium ion secondary battery cell will be described as an example of a battery. Of course, batteries other than the lithium ion secondary battery and batteries other than the cylindrical shape may be used. The battery pack has one or more lithium ion battery cells. In the following description, the same or similar components, processes, and the like are denoted by the same reference numerals, and duplicate description will be omitted as appropriate. Further, in order to prevent the illustration from being complicated, reference numerals may be given to only some of the components.
＜実施の形態＞
［電池パックの構成例］
　図１は、実施の形態に係る電池パック（電池パック１）の構成例を説明するための分解斜視図である。電池パック１は、電池（電池５）を収納、保持する電池ホルダ２と、内部に電池ホルダ２を収納する筐体部としてのケース３を有している。ケース３は、例えば、上下方向に上ケース３ａと下ケース３ｂとに分離可能とされている。例えば、電池ホルダ２が下ケース３ｂの所定位置に収納された後、上ケース３ａと下ケース３ｂとを係合させることで、電池ホルダ２がケース３の内部に収納される。 <Embodiment>
[Configuration example of battery pack]
FIG. 1 is an exploded perspective view illustrating a configuration example of a battery pack (battery pack 1) according to an embodiment. The battery pack 1 has a battery holder 2 for housing and holding a battery (battery 5), and a case 3 as a housing for housing the battery holder 2 therein. The case 3 is, for example, vertically separable into an upper case 3a and a lower case 3b. For example, after the battery holder 2 is stored at a predetermined position of the lower case 3b, the battery holder 2 is stored inside the case 3 by engaging the upper case 3a and the lower case 3b.
　ケース３は、高い熱伝導率および輻射率を有する材料を用いることが好ましい。これにより、優れた放熱性を得ることができ、ケース３内の温度上昇を抑制することができる。ケース３の材料としては、アルミニウムまたはアルミニウム合金または銅または銅合金を例示することができる。 The case 3 is preferably made of a material having high thermal conductivity and emissivity. Thereby, excellent heat dissipation can be obtained, and a rise in temperature in the case 3 can be suppressed. Examples of the material of the case 3 include aluminum, an aluminum alloy, copper, and a copper alloy.
　ケース３内に電池ホルダ２が収納された状態で、電池ホルダ２の外周面（外側表面）とケース３の内側表面とが密着する。なお、本明細書における密着とは、必ずしも電池ホルダ２の外周面全てとケース３の内側表面の全てとが接触している必要はなく、空隙を介して隣接して設けられる場合等も含む。例えば、電池５の正極及び負極に対してタブを接続できるようなスペースや、リード線を導出するスペース等が確保される程度に、電池ホルダ２の外周面とケース３の内側表面とが接していることも本明細書における密着に含まれる。 外 周 With the battery holder 2 stored in the case 3, the outer peripheral surface (outer surface) of the battery holder 2 and the inner surface of the case 3 come into close contact with each other. Note that the close contact in the present specification does not necessarily mean that all of the outer peripheral surface of the battery holder 2 and all of the inner surface of the case 3 are in contact with each other, and includes a case in which the battery holder 2 is provided adjacently via a gap. For example, the outer peripheral surface of the battery holder 2 and the inner surface of the case 3 are in contact with each other to such an extent that a space for connecting tabs to the positive electrode and the negative electrode of the battery 5 and a space for leading a lead wire are secured. Is included in the close contact in this specification.
［電池ホルダ］
（電池ホルダの構成例）
　図２及び図３を参照して、実施の形態に係る電池ホルダ２の構成例について説明する。電池ホルダ２は、例えば、ケース３の分離可能な方向と略直交する方向に、第１電池ホルダ２ａ及び第２電池ホルダ２ｂに分離可能とされる。第１電池ホルダ２ａ及び第２電池ホルダ２ｂを係合させることにより、電池５が収納、保持される。 [Battery holder]
(Example of battery holder configuration)
A configuration example of the battery holder 2 according to the embodiment will be described with reference to FIGS. The battery holder 2 is, for example, separable into a first battery holder 2a and a second battery holder 2b in a direction substantially orthogonal to a direction in which the case 3 can be separated. The battery 5 is housed and held by engaging the first battery holder 2a and the second battery holder 2b.
　電池ホルダ２は、１又は複数の電池５を収納、保持するための中空の円筒形状の電池収納部１１を複数、有している。電池収納部１１の両端には、円形状の孔部７が形成されており、電池５が挿入された状態では各電池の電極が孔部７を介して電池ホルダ２から露出するようになっている。孔部７を介して露出した電池５の電極に、タブ（不図示）等が適宜、接続される。 The battery holder 2 has a plurality of hollow cylindrical battery housing portions 11 for housing and holding one or a plurality of batteries 5. Circular holes 7 are formed at both ends of the battery housing 11, and the electrodes of each battery are exposed from the battery holder 2 through the holes 7 when the batteries 5 are inserted. I have. A tab (not shown) or the like is appropriately connected to the electrode of the battery 5 exposed through the hole 7.
　本実施の形態に係る電池ホルダ２には、一例として、電池収納部１１が２段４列に配列され、８本の電池が収納可能とされている。例えば、同段に収納された隣接する電池同士は、正極面および負極面の向きが互い違いとなるように配置される。また、各電池収納部１１は互いに所定の間隔を置いて設けられており、収納された電池５同士を絶縁することができる。 In the battery holder 2 according to the present embodiment, as an example, the battery storage units 11 are arranged in two rows and four rows, and can store eight batteries. For example, adjacent batteries housed in the same stage are arranged so that the directions of the positive electrode surface and the negative electrode surface are alternated. Further, the battery housing portions 11 are provided at a predetermined interval from each other, and can insulate the stored batteries 5 from each other.
　より具体的には、第１電池ホルダ２ａ及び第２電池ホルダ２ｂのそれぞれに電池収納部が２段４列に形成されている。例えば、第１電池ホルダ２ａの所定位置に中空の円筒形状である第１電池収納部１１ａが形成され、第２電池ホルダ２ｂの第１電池収納部１１ａに対応する位置に中空の円筒形状である第２電池収納部１１ｂが形成されている。第１電池ホルダ２ａと第２電池ホルダ２ｂとを係合させた状態では、第１電池収納部１１ａと第２電池収納部１１ｂとが連通して電池収納部１１が形成され、係る電池収納部１１に１個の電池５が収納可能となる。 More specifically, the first battery holder 2a and the second battery holder 2b each have a battery storage section formed in two rows and four rows. For example, a hollow cylindrical first battery storage portion 11a is formed at a predetermined position of the first battery holder 2a, and a hollow cylindrical shape is formed at a position corresponding to the first battery storage portion 11a of the second battery holder 2b. A second battery storage part 11b is formed. When the first battery holder 2a and the second battery holder 2b are engaged with each other, the first battery housing 11a and the second battery housing 11b communicate with each other to form the battery housing 11, and the battery housing 11 is formed. One battery 5 can be stored in 11.
（スリットについて）
　電池収納部１１の表面には、複数のスリットが形成されている。本実施の形態では、電池収納部１１の表面に、当該電池収納部１１の一方の開放端から他方の開放端に向かって、電池５の軸方向と略平行に延在するスリット１５が形成されている。より具体的には、第１電池収納部１１ａの表面に第１スリット１５ａが形成され、第２電池収納部１１ｂの表面に第２スリット１５ｂが形成されている。第１電池ホルダ２ａと第２電池ホルダ２ｂとを係合させた状態で、所定の第１スリット１５ａと、それに対応する第２スリット１５ｂにより、直線状のスリット１５が形成される。ここで、電池収納部の表面とは、電池収納部のうち、電池と接する側の面をいう。また、軸方向とは、電池の中心軸を意味し、例えば円筒形状の電池の場合、正極端子の中央部と負極端子の中央部を結ぶ方向である。 (About slit)
A plurality of slits are formed on the surface of the battery housing 11. In the present embodiment, a slit 15 is formed on the surface of the battery housing 11 so as to extend from one open end of the battery housing 11 to the other open end substantially in parallel with the axial direction of the battery 5. ing. More specifically, a first slit 15a is formed on the surface of the first battery housing 11a, and a second slit 15b is formed on the surface of the second battery housing 11b. In a state where the first battery holder 2a and the second battery holder 2b are engaged, a linear slit 15 is formed by the predetermined first slit 15a and the corresponding second slit 15b. Here, the surface of the battery storage unit refers to the surface of the battery storage unit that is in contact with the battery. The axial direction refers to the central axis of the battery, for example, in the case of a cylindrical battery, a direction connecting the center of the positive terminal and the center of the negative terminal.
　スリット１５の幅は、例えば０．５ｍｍ以下であり、スリット１５の深さは、例えば１～２ｍｍ程度である。スリット１５の幅を微小な幅とすることにより、電池収納部１１の表面と電池５の周面とが接触する面積が極端に減少してしまうことを防止することができ、電池収納部１１による電池５の保持力が低下してしまうことを抑制することができる。 幅 The width of the slit 15 is, for example, 0.5 mm or less, and the depth of the slit 15 is, for example, about 1 to 2 mm. By making the width of the slit 15 small, it is possible to prevent the area where the surface of the battery housing 11 comes into contact with the peripheral surface of the battery 5 from being extremely reduced. It is possible to suppress a decrease in the holding power of the battery 5.
　スリット１５の深さ方向は、例えば、電池５の径方向に沿う方向、換言すれば、円形状の電池５の端面の中心から外側に放射する放射方向である。より具体的には、所定のスリット１５の深さ方向は、例えば、電池５の所定の径方向、換言すれば、円形状の電池５の端面の中心から外側に放射する放射方向のうちの所定の方向に対して略平行となる方向である。 The depth direction of the slit 15 is, for example, a direction along the radial direction of the battery 5, in other words, a radiation direction radiating outward from the center of the end face of the circular battery 5. More specifically, the depth direction of the predetermined slit 15 is, for example, a predetermined radial direction of the battery 5, in other words, a predetermined one of radiation directions radiating outward from the center of the end face of the circular battery 5. This direction is substantially parallel to the direction.
　スリット１５は、適宜な方法により形成することができる。例えば、電池ホルダ２を射出成型で形成する場合には、金型に形成されたスリット１５に対応する形状を転写することによりスリット１５を形成することができる。電池ホルダ２に対して、レーザ、カッター、水圧等により切り込みを入れることで、スリット１５が形成されても良い。 The slit 15 can be formed by an appropriate method. For example, when the battery holder 2 is formed by injection molding, the slit 15 can be formed by transferring a shape corresponding to the slit 15 formed in the mold. The slit 15 may be formed by making a cut in the battery holder 2 with a laser, a cutter, water pressure, or the like.
（電池ホルダの材質）
　電池ホルダ２は、熱伝導性を有する弾性材料を含む弾性体により形成されている。弾性材料には、例えば、電気絶縁性を有するシリコーンゴム、エチレンプロピレンゴム（EPDM）、フッ素ゴム（FKM）等の合成ゴムまたは熱可塑性エラストマ樹脂を用いることができる。更に、電池ホルダ２を構成する弾性体には、吸熱物質、より具体的には、脱水吸熱する物質（以下、脱水吸熱物質と適宜、称する）が混練されている。係る脱水吸熱物質として、本実施の形態では、水酸化アルミニウムを用いている。 (Material of battery holder)
Battery holder 2 is formed of an elastic body containing an elastic material having thermal conductivity. As the elastic material, for example, a synthetic rubber such as silicone rubber, ethylene propylene rubber (EPDM), or fluoro rubber (FKM) having electrical insulation properties, or a thermoplastic elastomer resin can be used. Further, the elastic body constituting the battery holder 2 is kneaded with a heat-absorbing substance, more specifically, a substance capable of dehydrating and absorbing heat (hereinafter, appropriately referred to as a dehydrating heat-absorbing substance). In this embodiment, aluminum hydroxide is used as such a dehydration endothermic substance.
（電池ホルダの組立）
　電池ホルダ２は、例えば以下のようにして組み立てられる。始めに、所定の電池５の一端側を第１電池ホルダ２ａの第１電池収納部１１ａに挿入する。他の電池５も同様に挿入される。その後、所定の電池５の他端側を第２電池ホルダ２ｂの第２電池収納部１１ｂに挿入する。他の電池５も同様に挿入される。第１電池ホルダ２ａと第２電池ホルダ２ｂとが係合し、ネジによる締結等、適宜な方法で第１電池ホルダ２ａと第２電池ホルダ２ｂとが固定される。これにより電池ホルダ２が組み立てられ、電池ホルダ２により電池５が収納、保持される。勿論、始めに電池５を第２電池ホルダ２ｂの電池収納部に挿入しても良いし、電池５を、第１電池ホルダ２ａの電池収納部及び第２電池ホルダ２ｂの電池収納部のそれぞれに同時に挿入しても良い。 (Assembly of battery holder)
The battery holder 2 is assembled, for example, as follows. First, one end side of a predetermined battery 5 is inserted into the first battery storage portion 11a of the first battery holder 2a. Other batteries 5 are inserted similarly. After that, the other end of the predetermined battery 5 is inserted into the second battery holder 11b of the second battery holder 2b. Other batteries 5 are inserted similarly. The first battery holder 2a and the second battery holder 2b are engaged with each other, and the first battery holder 2a and the second battery holder 2b are fixed by an appropriate method such as fastening with a screw. Thereby, the battery holder 2 is assembled, and the battery 5 is stored and held by the battery holder 2. Of course, first, the battery 5 may be inserted into the battery compartment of the second battery holder 2b, or the battery 5 may be inserted into each of the battery compartment of the first battery holder 2a and the battery compartment of the second battery holder 2b. They may be inserted at the same time.
［電池ホルダの動作］
　次に、電池ホルダ２の動作例について説明する。電池ホルダ２に収納された複数の電池５のうち少なくとも１個の電池５が異常発熱（例えば、数百度から５００℃程度）する場合を想定する。電池５の異常発熱により電池ホルダ２の温度が上昇する。上述したように、電池ホルダ２には、水酸化アルミニウムが混練されている。電池ホルダ２に含まれる水酸化アルミニウムの温度がその分解温度（例えば、２００℃）に達すると、電池ホルダ２に含まれる水酸化アルミニウムが脱水吸熱反応を起こしてアルミナに化学変化する。係る脱水吸熱反応により、高温となった電池５が冷却される。吸熱反応後にできたアルミナは熱伝導性が良く、高温になった電池５の放熱に役立つ。 [Operation of battery holder]
Next, an operation example of the battery holder 2 will be described. It is assumed that at least one battery 5 out of the plurality of batteries 5 stored in the battery holder 2 generates abnormal heat (for example, about several hundred degrees to about 500 ° C.). The temperature of the battery holder 2 rises due to abnormal heat generation of the battery 5. As described above, the battery holder 2 is kneaded with aluminum hydroxide. When the temperature of the aluminum hydroxide contained in the battery holder 2 reaches its decomposition temperature (for example, 200 ° C.), the aluminum hydroxide contained in the battery holder 2 undergoes a dehydration-endothermic reaction and chemically changes to alumina. By the dehydration / endothermic reaction, the battery 5 having a high temperature is cooled. Alumina formed after the endothermic reaction has good thermal conductivity and is useful for heat dissipation of the battery 5 at a high temperature.
　水酸化アルミニウムの脱水吸熱反応により生成された水分は、異常発熱した電池５の温度により蒸発する。水分の気化熱によっても異常発熱した電池５を冷却することができる。なお、異常発熱した電池５の温度によっては、水酸化アルミニウムが脱水吸熱反応を呈する際に、結晶水（水蒸気）を放出する場合もあるが、係る場合でも上述と同様の原理で異常発熱した電池５を冷却することができる。なお、水蒸気は、例えば、スリット１５及び電池ホルダ２の孔部７を介して、電池パック１の外部に適宜、放出される。 (4) The water generated by the dehydration and endothermic reaction of aluminum hydroxide evaporates due to the temperature of the battery 5 that has abnormally generated heat. The battery 5 that has abnormally generated heat due to the heat of vaporization of water can be cooled. Note that, depending on the temperature of the battery 5 that has abnormally generated heat, the aluminum hydroxide may release water of crystallization (water vapor) when exhibiting a dehydration / endothermic reaction. 5 can be cooled. Note that the water vapor is appropriately released to the outside of the battery pack 1 through the slit 15 and the hole 7 of the battery holder 2, for example.
［本実施の形態の利点］
　本実施の形態により得られる効果の一例について説明する。本実施の形態では、電池ホルダ２全体に脱水吸熱物質を混練している。従って、異常発熱した電池５を効果的に冷却することができると共に、異常発熱した電池５の熱が、隣接する電池等に対して伝搬してしまうことを抑制することができる。 [Advantages of the present embodiment]
An example of the effect obtained by the present embodiment will be described. In the present embodiment, the dehydration endothermic substance is kneaded in the entire battery holder 2. Therefore, the battery 5 that has abnormally generated heat can be effectively cooled, and the heat of the battery 5 that has generated abnormally much heat can be suppressed from being transmitted to an adjacent battery or the like.
　本実施の形態では、電池５の周面と接触する電池収納部１１の表面にスリット１５を形成している。係るスリット１５を形成することにより、電池収納部１１の表面の表面積を増加させることができる。従って、電池ホルダ２が脱水吸熱する際の脱水する面積（水分が摘出する面積）を増加させることができ、吸熱効果を向上させることができる。 In the present embodiment, the slit 15 is formed on the surface of the battery housing 11 that contacts the peripheral surface of the battery 5. By forming such a slit 15, the surface area of the surface of the battery housing 11 can be increased. Therefore, the area for dehydration (the area from which water is extracted) when the battery holder 2 performs dehydration and heat absorption can be increased, and the heat absorbing effect can be improved.
　ここで、電池収納部１１の表面の表面積を増加させるために、スリット１５に変えて、図４に示すような凹凸２１を設けることも考えられる。しかしながら、係る技術では、電池収納部１１の表面と電池５の周面とが直接接触する面積が減少し、接触部分の熱伝導性が下がるため、放熱効果が低下する。従って、異常発熱した電池５を効果的に冷却することができない。また、電池収納部１１が電池５を点接触で支持するような状態になるので、電池ホルダ２の電池５の保持力が低下する虞もある。しかしながら、本実施の形態では、電池収納部１１の表面に、例えば、０．５ｍｍ以下の微小な幅のスリット１５とすることにより、電池収納部１１の表面の表面積を増加させることができる。また、スリット１５の幅が微小であるため、電池収納部１１による電池５の保持力が低下してしまうほど、電池収納部１１の表面と電池５の周面との接触面積が低下してしまうことを防止することができる。 Here, in order to increase the surface area of the surface of the battery housing portion 11, it is conceivable to provide unevenness 21 as shown in FIG. However, in such a technique, the area of direct contact between the surface of the battery housing 11 and the peripheral surface of the battery 5 is reduced, and the thermal conductivity of the contact portion is reduced, so that the heat radiation effect is reduced. Therefore, the battery 5 that has abnormally generated heat cannot be effectively cooled. In addition, since the battery housing 11 is in a state of supporting the battery 5 by point contact, the holding power of the battery holder 2 for the battery 5 may be reduced. However, in the present embodiment, the surface area of the surface of the battery housing 11 can be increased by forming a slit 15 having a small width of, for example, 0.5 mm or less on the surface of the battery housing 11. Further, since the width of the slit 15 is minute, the contact area between the surface of the battery housing 11 and the peripheral surface of the battery 5 decreases as the holding power of the battery 5 by the battery housing 11 decreases. Can be prevented.
　ところで、一般に、電池を収納していない状態における電池収納部の径は電池の径に対して同等又は若干小さく設計されていることが多い。これは、電池を電池収納部に圧入した際に、電池ホルダには弾性があるので、電池収納部の表面が少し圧縮されて電池に密着させるためである。本実施形態においても、電池５を収納していない状態における電池収納部１１の径の大きさが、電池５の径の大きさ以下に設定されている。 By the way, in general, the diameter of the battery storage portion in a state where no battery is stored is often designed to be equal to or slightly smaller than the diameter of the battery. This is because when the battery is pressed into the battery housing, the surface of the battery housing is slightly compressed and closely attached to the battery because the battery holder has elasticity. Also in the present embodiment, the diameter of the battery housing 11 in a state where the battery 5 is not housed is set to be equal to or smaller than the diameter of the battery 5.
　ここで、本実施の形態では、スリット１５の深さ方向を、例えば、電池５の径方向、換言すれば、円形状の電池５の端面の中心から外側に放射する放射方向としている。このため、図５に模式的に示すように、電池５を電池収納部１１に圧入する際に電池収納部１１の外側に向かう力（図中、矢印で示される方向に向かう力）によってスリット１５が潰れてしまうことを防止することができる。従って、スリット１５が潰れてしまうことによる不都合、例えば、吸熱効果の低下や脱水吸熱反応の際に生じる水蒸気の排出経路が閉塞してしまうことを防止することができる。 Here, in the present embodiment, the depth direction of the slit 15 is, for example, the radial direction of the battery 5, in other words, the radiation direction radiating outward from the center of the end surface of the circular battery 5. For this reason, as schematically shown in FIG. 5, when the battery 5 is pressed into the battery housing 11, the slit 15 is moved by a force directed outward of the battery housing 11 (a force directed in a direction indicated by an arrow in the figure). Can be prevented from being crushed. Therefore, it is possible to prevent inconvenience caused by the slit 15 being crushed, for example, a decrease in endothermic effect and a blockage of a discharge path of water vapor generated during a dehydration endothermic reaction.
　また、本実施の形態では、電池ホルダ２の外周面とケース３の内側表面とを密着させている。ここで、本実施の形態に係るケース３は、熱放熱性に優れた材質により構成されている。従って、電池ホルダ２に収納された電池５が異常発熱した場合でも、その熱が電池ホルダ２及びケース３を介して外部に排出されやすくすることができる。 In the present embodiment, the outer peripheral surface of the battery holder 2 and the inner surface of the case 3 are in close contact with each other. Here, case 3 according to the present embodiment is made of a material having excellent heat dissipation properties. Therefore, even when the battery 5 stored in the battery holder 2 generates abnormal heat, the heat can be easily discharged to the outside via the battery holder 2 and the case 3.
　さらに、正極肩部をカバーしタブを押し付けることにより電池ホルダが密着し、正極部への水の浸入を防ぐ効果がある。外力による衝撃を弾性体である電池ホルダ２で吸収できるため、例えば落下などの衝撃耐性が向上する効果がある。また、電池ホルダ２が脱水吸熱作用を有しているため、外部に熱を放出するための熱伝導部材を不要とすることができる。 Furthermore, by pressing the tab by covering the positive electrode shoulder, the battery holder is brought into close contact with the positive electrode, which has the effect of preventing water from entering the positive electrode. Since the impact due to the external force can be absorbed by the battery holder 2 which is an elastic body, there is an effect that the impact resistance such as dropping is improved. Further, since the battery holder 2 has a dehydrating heat absorbing action, a heat conducting member for releasing heat to the outside can be eliminated.
　以下、ゴムまたはエラストマに水酸化アルミニウムを混錬した電池ホルダを用い、電池収納部におけるスリットの有無による冷却性能の違いを比較した実施例に基づいて、本発明を具体的に説明する。なお、本発明は、以下に説明する実施例に限定されるものではない。 Hereinafter, the present invention will be specifically described based on an example in which a battery holder obtained by kneading aluminum hydroxide in rubber or an elastomer is used to compare the difference in cooling performance depending on the presence or absence of a slit in a battery housing. The present invention is not limited to the embodiments described below.
　［実施例１］
　電池ホルダとしては、図２に示される形状の電池ホルダを使用した。電池ホルダの電池収納部の表面に、１つの電池分につき、電池の軸方向に沿ってほぼ等間隔に１６本のスリットを形成した。スリットの深さを約１．５ｍｍとした。 [Example 1]
As the battery holder, a battery holder having a shape shown in FIG. 2 was used. Sixteen slits were formed on the surface of the battery holder of the battery holder at substantially equal intervals along the axial direction of the battery for one battery. The depth of the slit was about 1.5 mm.
　［実施例２］
　電池ホルダとしては、図２に示される形状の電池ホルダを使用した。電池ホルダの電池収納部の表面に、１つの電池分につき、電池の軸方向に沿ってほぼ等間隔に２７本のスリットを形成した。スリットの深さを約１．５ｍｍとした。 [Example 2]
As the battery holder, a battery holder having a shape shown in FIG. 2 was used. Twenty-seven slits were formed on the surface of the battery housing of the battery holder at substantially equal intervals along the axial direction of the battery for one battery. The depth of the slit was about 1.5 mm.
　［比較例］
　電池ホルダとしては、図２に示される形状の電池ホルダを使用した。電池収納部にスリットが１つもない状態にした。 [Comparative example]
As the battery holder, a battery holder having a shape shown in FIG. 2 was used. There was no slit in the battery compartment.
　なお、実施例１、２及び比較例では、直径が１８ｍｍであり、軸方向に沿った長さが６５ｍｍである電池収納部を有する電池ホルダを使用した。 In Examples 1 and 2 and Comparative Example, a battery holder having a battery storage part having a diameter of 18 mm and a length along the axial direction of 65 mm was used.
　［評価］
　上述した電池ホルダについて評価を行った。評価は、スリットの数を変化させることにより、電池ホルダの脱水吸熱有効面積を変化させて行った。また、電池ホルダの中の一つの電池を異常発熱させた。そして、水酸化アルミニウム（脱水吸熱反応後はアルミナに変化）が異常発熱した電池に対する冷却にどれほど寄与するかを評価するため、異常発熱させた電池に隣接する電池の温度が最大温度から１００℃まで下がるのに要する時間（秒）を計測した。さらに、異常発熱させた電池に隣接する電池の延焼の有無について観察した。結果を下記の表１に示す。 [Evaluation]
The battery holder described above was evaluated. The evaluation was performed by changing the number of slits to change the dehydration and heat absorption effective area of the battery holder. In addition, one battery in the battery holder was abnormally heated. Then, in order to evaluate how much aluminum hydroxide (converted to alumina after the dehydration endothermic reaction) contributes to the cooling of the battery that generated abnormal heat, the temperature of the battery adjacent to the battery that generated abnormal heat was increased from the maximum temperature to 100 ° C. The time (seconds) required to go down was measured. Further, the presence or absence of fire spread of the battery adjacent to the battery that caused abnormal heat generation was observed. The results are shown in Table 1 below.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　電池収納部にスリットを入れない場合（比較例）の脱水吸熱有効面積は、電池収納部の表面積に等しく、３．１４×１８×６５＝３６７４ｍｍ2である。実施例１の脱水吸熱有効面積は、比較例で求めた面積にスリットの面積を足して、３６７４＋１．５×６５×２（スリットの中で両側に壁があることの乗算）×１６（スリットの数）＝６７９４ｍｍ2になる（比較例の約１．８倍）。また、実施例２の脱水吸熱有効面積は、同様に計算し、３６７４＋１．５×６５×２×２７＝８９３９ｍｍ2になる（比較例の約２．４倍）。即ち、スリットが形成されることにより脱水吸熱有効面積が増加した。実施例１と実施例２では、異常発熱させた電池に隣接する電池が延焼しなかったのに対し、比較例では延焼した。なお、異常発熱させた電池の最高温度は約６００℃であり、異常加熱させた電池に隣接する電池の最大温度は３００℃から４００℃くらいであった。異常加熱させた電池に隣接する電池の温度が最大温度から１００℃まで下がるのに要する時間は、実施例１では１０７０秒、実施例２では９８０秒であった。比較例では、異常加熱させた電池に隣接する電池が延焼したため計測不能であった。 When no slit is formed in the battery housing (comparative example), the effective area for dehydration and heat absorption is equal to the surface area of the battery housing, and is 3.14 × 18 × 65 = 3677 mm 2 . The dehydration endothermic effective area in Example 1 is calculated by adding the area of the slit to the area obtained in the comparative example, and 367 + 1.5 × 65 × 2 (multiplication of the presence of walls on both sides in the slit) × 16 (of the slit). (Number) = 6794 mm 2 (about 1.8 times of the comparative example). In addition, the effective area for dehydration and heat absorption of Example 2 is calculated in the same manner, and becomes 367 + 1.5 × 65 × 2 × 27 = 8939 mm 2 (about 2.4 times the comparative example). That is, the formation of the slit increased the dewatering endothermic effective area. In Examples 1 and 2, the battery adjacent to the battery that caused abnormal heat generation did not spread, whereas the comparative example did. The maximum temperature of the battery that generated abnormal heat was about 600 ° C., and the maximum temperature of the battery adjacent to the battery that abnormally heated was about 300 ° C. to 400 ° C. The time required for the temperature of the battery adjacent to the abnormally heated battery to decrease from the maximum temperature to 100 ° C. was 1070 seconds in Example 1 and 980 seconds in Example 2. In the comparative example, it was impossible to measure because the battery adjacent to the abnormally heated battery spread.
　以上の結果より、実施例１および実施例２では、１つの電池が異常発熱したときでも隣接電池の延焼を防止することができた。さらに、電池収納部の表面に複数のスリットを配置する場合、電池セルの表面付近のホルダの表面積が増加し、電池の異常発熱の際に、脱水吸熱反応による吸熱量が増加するため、スリット無しの場合より多くの熱を吸収できる効果があると言える。スリットの数を増やすことで脱水吸熱有効面積が増加し、異常発熱した電池に隣接する電池を速やかに冷却することができた。また、電池と接触する面の加工形状をスリットとすることにより、電池と密着する面積はスリット無しの場合から殆ど減少させず、効率良く放熱することができた。 よ り From the above results, in Examples 1 and 2, even when one battery abnormally generated heat, it was possible to prevent the spread of fire in the adjacent battery. Furthermore, when a plurality of slits are arranged on the surface of the battery housing, the surface area of the holder near the surface of the battery cell increases, and the amount of heat absorbed by the dehydration endothermic reaction increases when the battery abnormally generates heat. In this case, it can be said that there is an effect that more heat can be absorbed. By increasing the number of slits, the effective area for dehydration and heat absorption increased, and the battery adjacent to the abnormally heated battery could be quickly cooled. In addition, by forming the processing shape of the surface in contact with the battery as a slit, the area in close contact with the battery was hardly reduced from the case without the slit, and heat was efficiently radiated.
＜変形例＞
　以上、本発明の実施の形態について具体的に説明したが、本発明の内容は上述した実施の形態に限定されるものではなく、本発明の技術的思想に基づく各種の変形が可能である。 <Modification>
Although the embodiments of the present invention have been specifically described above, the contents of the present invention are not limited to the above-described embodiments, and various modifications based on the technical idea of the present invention are possible.
　図６は、変形例を説明するための図である。図６に示すように、電池ホルダ２が上下方向に分離可能とされても良い。また、電池ホルダ２は、第１、第２電池ホルダ２ａ、２ｂ内に収納される電池支持体２５を有している。電池支持体２５の上下４列には、半円状の凹部２６が形成されている。 FIG. 6 is a diagram for explaining a modification. As shown in FIG. 6, the battery holder 2 may be separable in the vertical direction. The battery holder 2 has a battery support 25 housed in the first and second battery holders 2a and 2b. Semicircular concave portions 26 are formed in the upper and lower four rows of the battery support 25.
　例えば、第２電池ホルダ２ｂに形成されている４箇所の半円状の凹部に対して、４本の電池５がそれぞれ収納される。そして、電池支持体２５の下側の凹部２６が電池５の上側半分に被せられる。そして、電池支持体２５の上側の凹部２６に、４本の電池５が収納される。第１電池ホルダ２ａを第２電池ホルダ２ｂに係合させることにより、８本の電池５が電池ホルダ２内に収納される。 For example, four batteries 5 are respectively stored in four semicircular recesses formed in the second battery holder 2b. Then, the concave portion 26 on the lower side of the battery support 25 is put on the upper half of the battery 5. The four batteries 5 are housed in the concave portion 26 on the upper side of the battery support 25. The eight batteries 5 are housed in the battery holder 2 by engaging the first battery holder 2a with the second battery holder 2b.
　第１、第２電池ホルダ２ａ、２ｂ及び電池支持体２５の、少なくとも電池５の周面と接触する表面に、スリット１５が形成される。具体的には、第１電池ホルダ２ａの表面に第１スリット１５ａが形成され、第２電池ホルダ２ｂの表面に第２スリット１５ｂが形成され、電池支持体２５の表面に第３スリット１５ｃが形成される。 ス リ ッ ト A slit 15 is formed in at least a surface of the first and second battery holders 2a and 2b and the battery support 25 that comes into contact with the peripheral surface of the battery 5. Specifically, a first slit 15a is formed on the surface of the first battery holder 2a, a second slit 15b is formed on the surface of the second battery holder 2b, and a third slit 15c is formed on the surface of the battery support 25. Is done.
　各スリットは、実施の形態と同様のスリットでも良いが、本例における第１、第２、第３スリット１５ａ、１５ｂ及び１５ｃは、電池５の円周方向に沿って形成されている。このように、スリット１５の形状は、実施の形態で説明した形状に限定されるものではない。また、スリット１５を電池の円周方向及び軸方向を組み合わせた格子状に形成しても良い。スリット１５の数を増加させることができ、脱水吸熱効果を向上させることができる。また、例えば雌ねじ溝のように螺旋状（渦巻き状）に沿って１本または複数のスリット１５が形成されても良い。なお、スリット１５の本数は、脱水吸熱有効面積を増加させる観点及びスリット１５を形成する加工の容易性等を考慮して適切に設定される。 Each slit may be the same slit as in the embodiment, but the first, second, and third slits 15a, 15b, and 15c in this example are formed along the circumferential direction of the battery 5. Thus, the shape of the slit 15 is not limited to the shape described in the embodiment. Further, the slits 15 may be formed in a lattice shape combining the circumferential direction and the axial direction of the battery. The number of slits 15 can be increased, and the dehydration and heat absorption effect can be improved. Further, for example, one or a plurality of slits 15 may be formed along a spiral shape like a female screw groove. In addition, the number of the slits 15 is appropriately set in consideration of the viewpoint of increasing the dehydration endothermic effective area, the easiness of processing for forming the slits 15, and the like.
　電池ホルダに収納できる電池セルの数は８本に限らず、７本以下でも９本以上でも良く、その数に対応した電池収納部の数で良い。電池ホルダの素材をゴムまたはエラストマとしていたが、弾性体であれば何でも良い。電池収納部及び電池セルの形状を円筒形状としていたが、角形形状や薄板状であっても良い。 The number of battery cells that can be stored in the battery holder is not limited to eight, and may be seven or less or nine or more, and the number of battery storage units corresponding to the number may be sufficient. Although the material of the battery holder is rubber or elastomer, any material may be used as long as it is an elastic body. Although the shapes of the battery housing and the battery cells are cylindrical, they may be square or thin.
　脱水吸熱反応を呈する物質として水酸化アルミニウムを例に挙げたが、他の例としては、水酸化マグネシウム、硫酸マグネシウム７水和物、水酸化カルシウム、ゼオライトなどが挙げられる。これらの物質に限らず、脱水吸熱反応を呈する物質であれば何でも良い。吸熱する物質の反応として、脱水吸熱反応を例に挙げていたが、他には例えば、脱水素吸熱反応、脱炭酸吸熱反応、脱窒素吸熱反応、脱酸素吸熱反応などが挙げられる。吸熱する物質であれば、どのような反応を呈する物質でも良い。 (4) Although aluminum hydroxide was mentioned as an example of a substance exhibiting a dehydration endothermic reaction, other examples include magnesium hydroxide, magnesium sulfate heptahydrate, calcium hydroxide, zeolite, and the like. Not limited to these substances, any substance that exhibits a dehydration endothermic reaction may be used. Although the dehydration endothermic reaction has been described as an example of the reaction of a substance that absorbs heat, other examples include a dehydrogenation endothermic reaction, a decarboxylation endothermic reaction, a denitrification endothermic reaction, and a deoxygenating endothermic reaction. Any substance exhibiting any reaction may be used as long as it is an endothermic substance.
　電池の表面の保護部材やラミネート型の電池内部の所定の層に、脱水吸熱物質が混練されスリットが形成された弾性体を設けても良い。係る構成によれば、電池の耐衝撃性を向上させることができると共に、電池が異常発熱した場合に当該電池を効果的に冷却することができる。また、電池を基板等に接続する接続部材等に対して、脱水吸熱物質が混練されスリットが形成された弾性体を使用しても良い。 (4) An elastic body having a slit formed by kneading a dehydration endothermic substance may be provided in a protective member on the surface of the battery or a predetermined layer inside the laminate type battery. According to such a configuration, the impact resistance of the battery can be improved, and the battery can be effectively cooled when the battery generates abnormal heat. Further, an elastic body in which a dehydration heat absorbing substance is kneaded and a slit is formed may be used for a connection member or the like for connecting the battery to a substrate or the like.
　なお、本明細書では、円筒形状のリチウムイオン二次電池を例に説明したが、それ以外にも、ナトリウムイオン電池や、アルミニウムイオン電池、マグネシウムイオン電池、ニッケル水素電池、鉛電池などのあらゆる電池（二次電池であるか一次電池であるかを問わない。）を適用することができる。また、円筒形状に限らず、発明の趣旨を逸脱しない範囲で、角型電池、多角形状電池などの他の形状の電池も適用し得る。 In this specification, a cylindrical lithium ion secondary battery has been described as an example, but in addition to this, any battery such as a sodium ion battery, an aluminum ion battery, a magnesium ion battery, a nickel metal hydride battery, and a lead battery can be used. (Regardless of whether the battery is a secondary battery or a primary battery). Further, the battery is not limited to the cylindrical shape, and batteries of other shapes such as a square battery and a polygonal battery may be applied without departing from the spirit of the invention.
　上述の実施の形態において挙げた構成、方法、工程、形状、材料および数値などはあくまでも例に過ぎず、必要に応じてこれと異なる構成、方法、工程、形状、材料および数値などを用いてもよい。また、実施の形態および変形例で説明した事項は、技術的な矛盾が生じない限り相互に組み合わせることができる。 The configurations, methods, steps, shapes, materials, and numerical values and the like described in the above-described embodiments are merely examples, and if necessary, different configurations, methods, steps, shapes, materials, and numerical values may be used. Good. The matters described in the embodiments and the modifications can be combined with each other as long as no technical contradiction occurs.
＜応用例＞
［応用例としての電子機器］
　次に、本発明の応用例について説明する。なお、本発明は、以下に例示する応用例に限定されるものではない。図７は、電子機器１６０１の構成例を示す。本例における電子機器１６０１は、例えば、パーソナルコンピュータを想定している。電子機器１６０１は、コントローラＩＣ１６１５と、センサー１６２０と、電子機器１６０１を統括的に制御するホスト機器１６１６と、表示装置１６１２と、電源としての電池パック１６１７とを備える。センサー１６２０がコントローラＩＣ１６１５を含んでいてもよい。 <Application example>
[Electronic equipment as application examples]
Next, application examples of the present invention will be described. Note that the present invention is not limited to the following application examples. FIG. 7 illustrates a configuration example of the electronic device 1601. The electronic device 1601 in this example is, for example, a personal computer. The electronic device 1601 includes a controller IC 1615, a sensor 1620, a host device 1616 that controls the electronic device 1601 overall, a display device 1612, and a battery pack 1617 as a power supply. Sensor 1620 may include controller IC 1615.
　センサー１６２０は、例えば、ユーザを撮影可能なカメラである。センサー１６２０は、ユーザの生体情報や電子機器１６０１の周囲の環境（温度や湿度等）を測定するものでも良い。センサー１６２０は、検出した出力信号をコントローラＩＣ１６１５に出力する。コントローラＩＣ１６１５は、センサー１６２０からの出力信号に基づき、各種の制御を実行する。 The sensor 1620 is, for example, a camera that can photograph a user. The sensor 1620 may measure biological information of the user or an environment (temperature, humidity, and the like) around the electronic device 1601. The sensor 1620 outputs the detected output signal to the controller IC 1615. The controller IC 1615 executes various controls based on an output signal from the sensor 1620.
　ホスト機器１６１６は、コントローラＩＣ１６１５から供給される情報に基づき、各種の処理を実行する。例えば、表示装置１６１２に対する文字情報や画像情報等の表示、表示装置１６１２に表示されたカーソルの移動、画面のスクロール等の処理を実行する。 (4) The host device 1616 executes various processes based on information supplied from the controller IC 1615. For example, processing such as display of character information or image information on the display device 1612, movement of a cursor displayed on the display device 1612, scrolling of a screen, and the like are executed.
　表示装置１６１２は、例えばフレキシブルな表示装置であり、ホスト機器１６１６から供給される映像信号や制御信号等に基づき、画面を表示する。表示装置１６１２としては、例えば、液晶ディスプレイ、エレクトロルミネッセンス（Electro Luminescence：ＥＬ）ディスプレイ、電子ペーパー等が挙げられるが、これに限定されるものではない。 The display device 1612 is, for example, a flexible display device, and displays a screen based on a video signal, a control signal, and the like supplied from the host device 1616. Examples of the display device 1612 include, but are not limited to, a liquid crystal display, an electro-luminescence (Electro Luminescence: EL) display, electronic paper, and the like.
　電池パック１６１７は、上述の実施の形態又はその変形例に係る電池パックである。このように、実施の形態又は変形例に係る電池パックは、電子機器が有する電池パックとして適用することができる。 The battery pack 1617 is a battery pack according to the above-described embodiment or a modification thereof. Thus, the battery pack according to the embodiment or the modified example can be applied as a battery pack included in an electronic device.
　本発明は電池を備える種々の電子機器に適用可能であり、上述の応用例で説明した電子機器１６０１に限定されるものではない。上述の応用例以外の電子機器としては、例えば、ノート型パーソナルコンピュータ、タブレット型コンピュータ、携帯電話（例えばスマートフォン等）、携帯情報端末（Personal Digital Assistants：ＰＤＡ）、表示装置（ＬＣＤ、ＥＬディスプレイ、電子ペーパ等）、撮像装置（例えばデジタルスチルカメラ、デジタルビデオカメラ等）、オーディオ機器（例えばポータブルオーディオプレイヤー）、ゲーム機器、ユニバーサルクレジットカード、センサーネットワーク端末、スマートウオッチ、メガネ型端末（ヘッドマウントディスプレイ（ＨＭＤ）等）、コードレスフォン子機、電子書籍、電子辞書、ラジオ、ヘッドホン、ナビゲーションシステム、メモリーカード、ペースメーカー、補聴器、電動ドライバやチェーンソー等の電動工具、電気シェーバー、ドローン等の電動飛行体、冷蔵庫、エアコン、テレビ、ステレオ、温水器、電子レンジ、食器洗い器、洗濯機、乾燥器、照明機器、玩具、医療機器、ロボット、ロードコンディショナー、信号機、例示した以外のモバイル機器（例えば、人体に着脱可能なウエアラブル機器）等が挙げられるが、これらに限定されるものでなない。 The present invention is applicable to various electronic devices provided with a battery, and is not limited to the electronic device 1601 described in the above application example. Examples of electronic devices other than the above-described application examples include a notebook personal computer, a tablet computer, a mobile phone (for example, a smartphone), a personal digital assistant (Personal Digital Assistants: PDA), a display device (LCD, EL display, electronic device). Paper, etc.), imaging devices (eg, digital still cameras, digital video cameras, etc.), audio devices (eg, portable audio players), game devices, universal credit cards, sensor network terminals, smart watches, glasses-type terminals (head-mounted displays (HMDs) ), Cordless phone cordless handset, electronic book, electronic dictionary, radio, headphones, navigation system, memory card, pacemaker, hearing aid, electric tools such as electric driver and chainsaw, electric Electric flying objects such as shavers and drones, refrigerators, air conditioners, televisions, stereos, water heaters, microwave ovens, dishwashers, washing machines, dryers, lighting equipment, toys, medical equipment, robots, road conditioners, traffic lights, other than those illustrated Mobile devices (for example, wearable devices that can be attached to and detached from the human body) and the like, but are not limited thereto.
［応用例としてのハイブリッド車両］
　本発明を車両用の蓄電システムに適用した例について、図８を参照して説明する。図８に、本発明が適用されるシリーズハイブリッドシステムを採用するハイブリッド車両の構成を概略的に示す。シリーズハイブリッドシステムはエンジンで動かす発電機で発電された電力、あるいはそれをバッテリーに一旦貯めておいた電力を用いて、電力駆動力変換装置で走行する車である。 [Hybrid vehicle as an application example]
An example in which the present invention is applied to a power storage system for a vehicle will be described with reference to FIG. FIG. 8 schematically shows a configuration of a hybrid vehicle employing a series hybrid system to which the present invention is applied. The series hybrid system is a vehicle that runs on a power driving force conversion device using electric power generated by a generator driven by an engine or electric power once stored in a battery.
　このハイブリッド車両７２００には、エンジン７２０１、発電機７２０２、電力駆動力変換装置７２０３、駆動輪７２０４ａ、駆動輪７２０４ｂ、車輪７２０５ａ、車輪７２０５ｂ、蓄電装置７２０８、車両制御装置７２０９、各種センサー７２１０、充電口７２１１が搭載されている。蓄電装置７２０８は、上述の実施の形態およびその変形例のいずれかにおける電池パックを備える。 The hybrid vehicle 7200 includes an engine 7201, a generator 7202, a power driving force conversion device 7203, a driving wheel 7204a, a driving wheel 7204b, a wheel 7205a, a wheel 7205b, a power storage device 7208, a vehicle control device 7209, various sensors 7210, a charging port. 7211 is mounted. The power storage device 7208 includes the battery pack according to any of the above-described embodiment and its modifications.
　ハイブリッド車両７２００は、電力駆動力変換装置７２０３を動力源として走行する。電力駆動力変換装置７２０３の一例は、モーターである。蓄電装置７２０８の電力によって電力駆動力変換装置７２０３が作動し、この電力駆動力変換装置７２０３の回転力が駆動輪７２０４ａ、７２０４ｂに伝達される。なお、必要な個所に直流－交流変換（ＤＣ－ＡＣ変換）あるいは逆変換（ＡＣ－ＤＣ変換）を用いることによって、電力駆動力変換装置７２０３が交流モーターでも直流モーターでも適用可能である。各種センサー７２１０は、車両制御装置７２０９を介してエンジン回転数を制御したり、図示しないスロットルバルブの開度（スロットル開度）を制御したりする。各種センサー７２１０には、速度センサー、加速度センサー、エンジン回転数センサー等が含まれる。 The hybrid vehicle 7200 runs using the power driving force conversion device 7203 as a power source. An example of the power driving force conversion device 7203 is a motor. The power of the power storage device 7208 activates the power driving force conversion device 7203, and the rotational force of the power driving force conversion device 7203 is transmitted to the driving wheels 7204a and 7204b. Note that by using DC-AC conversion (DC-AC conversion) or inverse conversion (AC-DC conversion) where necessary, the power driving force conversion device 7203 can be applied to either an AC motor or a DC motor. The various sensors 7210 control the engine speed via the vehicle control device 7209 and control the opening of a throttle valve (not shown) (throttle opening). The various sensors 7210 include a speed sensor, an acceleration sensor, an engine speed sensor, and the like.
　エンジン７２０１の回転力は発電機７２０２に伝えられ、その回転力によって発電機７２０２により生成された電力を蓄電装置７２０８に蓄積することが可能である。 The torque of the engine 7201 is transmitted to the generator 7202, and the power generated by the generator 7202 can be stored in the power storage device 7208 by the torque.
　図示しない制動機構によりハイブリッド車両が減速すると、その減速時の抵抗力が電力駆動力変換装置７２０３に回転力として加わり、この回転力によって電力駆動力変換装置７２０３により生成された回生電力が蓄電装置７２０８に蓄積される。 When the hybrid vehicle is decelerated by a braking mechanism (not shown), a resistance force at the time of the deceleration is applied to electric power driving force conversion device 7203 as a rotational force, and the regenerative electric power generated by electric power driving force conversion device 7203 by this rotational force is stored in power storage device 7208. Is accumulated in
　蓄電装置７２０８は、ハイブリッド車両の外部の電源に接続されることで、その外部電源から充電口７２１１を入力口として電力供給を受け、受けた電力を蓄積することも可能である。 The power storage device 7208 can be connected to a power supply external to the hybrid vehicle, receive power from the external power supply using the charging port 7211 as an input port, and store the received power.
　図示しないが、二次電池に関する情報に基いて車両制御に関する情報処理を行なう情報処理装置を備えていてもよい。このような情報処理装置としては、例えば、電池の残量に関する情報に基づき、電池残量表示を行う情報処理装置等がある。 Although not shown, an information processing device that performs information processing on vehicle control based on information on the secondary battery may be provided. As such an information processing apparatus, for example, there is an information processing apparatus that displays the remaining battery level based on information regarding the remaining battery level.
　なお、以上は、エンジンで動かす発電機で発電された電力、或いはそれをバッテリーに一旦貯めておいた電力を用いて、モーターで走行するシリーズハイブリッド車を例として説明した。しかしながら、エンジンとモーターの出力がいずれも駆動源とし、エンジンのみで走行、モーターのみで走行、エンジンとモーター走行という３つの方式を適宜切り替えて使用するパラレルハイブリッド車に対しても本発明は有効に適用可能である。さらに、エンジンを用いず駆動モーターのみによる駆動で走行する所謂、電動車両に対しても本発明は有効に適用可能である。 In the above, the series hybrid vehicle driven by the motor using the power generated by the generator driven by the engine or the power once stored in the battery has been described as an example. However, the present invention can be effectively applied to a parallel hybrid vehicle in which the output of both the engine and the motor is used as a drive source, and the three modes of running only with the engine, running only with the motor, and running with the engine and the motor are appropriately switched and used. Applicable. Further, the present invention can be effectively applied to a so-called electric vehicle that travels only by a drive motor without using an engine.
　以上、本発明に係る技術が適用され得るハイブリッド車両７２００の一例について説明した。本発明に係る技術は、以上説明した構成のうち、蓄電装置７２０８に好適に適用され得る。なお、本発明は、上述したハイブリッド車両以外の電動車両、具体的には、電動自転車、電動三輪車、電動カート等に対しても適用され得る。 The example of the hybrid vehicle 7200 to which the technology according to the present invention can be applied has been described above. The technology according to the present invention can be suitably applied to the power storage device 7208 among the configurations described above. The present invention can be applied to an electric vehicle other than the hybrid vehicle described above, specifically, an electric bicycle, an electric tricycle, an electric cart, and the like.
１・・・電池パック、２・・・電池ホルダ、３・・・ケース、５・・・電池、１１，１１ａ,１１ｂ・・・電池収納部、１５,１５ａ,１５ｂ・・・スリット DESCRIPTION OF SYMBOLS 1 ... Battery pack, 2 ... Battery holder, 3 ... Case, 5 ... Battery, 11, 11a, 11b ... Battery storage part, 15, 15a, 15b ... Slit

Claims (12)

  1. 　脱水吸熱反応を呈する物質を混練した弾性体により構成され、
    　電池が収納される電池収納部を有し、
    　前記電池収納部の表面にスリットが形成されている電池ホルダ。     It is composed of an elastic body kneaded with a substance exhibiting a dehydration endothermic reaction,
    It has a battery storage section in which batteries are stored,
    A battery holder in which a slit is formed in a surface of the battery housing.
  2. 　前記スリットが前記電池の軸方向に沿って形成されている
    　請求項１に記載の電池ホルダ。     The battery holder according to claim 1, wherein the slit is formed along an axial direction of the battery.
  3. 　前記電池は円筒形状を有し、
    　前記スリットが前記電池の円周方向に沿って形成されている
    　請求項１に記載の電池ホルダ。     The battery has a cylindrical shape,
    The battery holder according to claim 1, wherein the slit is formed along a circumferential direction of the battery.
  4. 　前記電池は円筒形状を有し、
    　前記スリットが前記電池の円周方向と軸方向とを組み合わせた格子状、又は、螺旋状に形成されている
    　請求項１に記載の電池ホルダ。     The battery has a cylindrical shape,
    The battery holder according to claim 1, wherein the slit is formed in a lattice shape or a spiral shape in which a circumferential direction and an axial direction of the battery are combined.
  5. 　前記電池は円筒形状を有し、
    　前記スリットの深さ方向が、前記電池の径方向に沿っている
    　請求項１に記載の電池ホルダ。     The battery has a cylindrical shape,
    The battery holder according to claim 1, wherein a depth direction of the slit is along a radial direction of the battery.
  6. 　前記電池は円筒形状を有し、
    　前記電池収納部は、円筒形状の前記電池を収納する中空の円筒形状を有し、
    　前記電池を収納していない状態における前記電池収納部の径の大きさが、前記電池の径の大きさ以下である
    　請求項１に記載の電池ホルダ。     The battery has a cylindrical shape,
    The battery storage section has a hollow cylindrical shape that stores the cylindrical battery,
    The battery holder according to claim 1, wherein the size of the diameter of the battery storage portion in a state where the battery is not stored is equal to or less than the size of the diameter of the battery.
  7. 　前記脱水吸熱反応を呈する物質は、水酸化アルミニウム、水酸化マグネシウム、硫酸マグネシウム７水和物、水酸化カルシウム及びゼオライトのうちの少なくとも１つである
    　請求項１から６の何れかに記載の電池ホルダ。     The battery holder according to any one of claims 1 to 6, wherein the substance exhibiting the dehydration endothermic reaction is at least one of aluminum hydroxide, magnesium hydroxide, magnesium sulfate heptahydrate, calcium hydroxide, and zeolite. .
  8. 　前記電池収納部を複数有する
    　請求項１から７の何れかに記載の電池ホルダ。     The battery holder according to any one of claims 1 to 7, comprising a plurality of the battery storage portions.
  9. 　請求項１から８の何れかに記載の電池ホルダと、
    　前記電池ホルダが有する電池収納部に収納される電池と、
    　前記電池ホルダを収納する筐体部と
    　を有する電池パック。     A battery holder according to any one of claims 1 to 8,
    A battery housed in a battery housing part of the battery holder,
    A battery pack, comprising: a housing for accommodating the battery holder.
  10. 　前記電池ホルダの外側表面が、前記筐体部の内側表面と密着している
    　請求項９に記載の電池パック。     The battery pack according to claim 9, wherein an outer surface of the battery holder is in close contact with an inner surface of the housing.
  11. 　請求項９または１０に記載の電池パックを有する電子機器。 An electronic device having the battery pack according to claim 9 or 10.
  12. 　請求項９または１０に記載の電池パックを有する電動車両。 An electric vehicle having the battery pack according to claim 9.
PCT/JP2019/021088 2018-08-06 2019-05-28 Battery holder, battery pack, electronic device and electric vehicle WO2020031467A1 (en)

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