CN113950770A - Battery pack, electric tool, electric vehicle, and battery housing outer case - Google Patents
Battery pack, electric tool, electric vehicle, and battery housing outer case Download PDFInfo
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- CN113950770A CN113950770A CN202080041848.2A CN202080041848A CN113950770A CN 113950770 A CN113950770 A CN 113950770A CN 202080041848 A CN202080041848 A CN 202080041848A CN 113950770 A CN113950770 A CN 113950770A
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—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
- H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
- H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
- H01M50/227—Organic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
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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
- H01M50/247—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers
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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
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
-
- 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
- H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
- H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/271—Lids or covers for the racks or secondary casings
- H01M50/273—Lids or covers for the racks or secondary casings characterised by the material
- H01M50/278—Organic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biophysics (AREA)
- Computer Hardware Design (AREA)
- Aviation & Aerospace Engineering (AREA)
- Battery Mounting, Suspending (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The battery pack includes at least one battery and an outer case. The outer case has a top portion where a first outline line and a second outline line forming an outline intersect, and the top portion forming surface forming the top portion has: a plurality of impact resistant portions extending obliquely at an angle between the first outline and the second outline and below the level with respect to the top formation surface; and a plurality of groove portions forming the plurality of impact resistant portions.
Description
Technical Field
The present invention relates to a battery pack including an outer case, and an electric power tool, an electric vehicle, and an outer case for accommodating a battery, each including the battery pack.
Background
A technique for protecting a battery pack including an outer case from an impact such as a drop is known. For example, patent document 1 listed below discloses a technique of providing a space locally between an exterior case and a battery by a non-contact recess formed in an inner surface of the exterior case, and using the space to mitigate an impact on the battery when the battery is dropped.
In addition, for example, patent document 2 below discloses a technique for protecting a battery from impact by disposing a protective member (specifically, a piano wire, a metal plate, a rubber member, or the like) between an exterior case and the battery.
As an impact-resistant structure of an electronic device, a technique of attaching a protective member to a corner portion of a housing via an elastic buffer material has also been proposed (for example, see patent document 3 below).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2017-68972
Patent document 2: japanese patent laid-open publication No. 2011-
Patent document 3: japanese laid-open patent publication No. 10-322039
Disclosure of Invention
Technical problem to be solved by the invention
However, the techniques disclosed in patent documents 1 and 2 do not provide cushioning protection with the outer case, and only aim at protecting the battery housed in the outer case. In addition, in patent document 1, when the shock absorbing protection is required, since the concave portion is formed on the inner surface of the outer case without changing the outer shape of the outer case, the thickness of the outer case is reduced in the concave portion, and there is a problem that the strength of the case itself is reduced by that amount.
In addition, in the techniques disclosed in patent documents 2 and 3, it is necessary to add a cushioning member in addition to the outer case, which leads to an increase in cost and weight.
Accordingly, an object of the present invention is to provide a battery pack that can improve impact resistance including an outer case without providing an additional member, and an electric power tool, an electric vehicle, and an outer case for battery storage that include the battery pack.
Technical solution for solving technical problem
In order to solve the above-described problems, the present invention relates to a battery pack including at least one battery and an outer case having a top portion where a first outline line and a second outline line forming an outline intersect each other, the battery pack including: a plurality of impact resistant portions extending obliquely at an angle between the first profile line and the second profile line and below flush with respect to the top formation surface; and a plurality of groove portions forming the plurality of impact resistant portions.
The present invention relates to a battery pack including at least one battery and an exterior case having a top portion where a first outline line forming an outline intersects with a second outline line, the exterior case having: a hexagonal-shaped plurality of impact-resistant sections arranged in a honeycomb structure and below flush with the top-constituting surface; and a groove portion forming the plurality of impact resistant portions.
The present invention relates to a battery pack including at least one battery and an exterior case having a top portion in which a first outline line and a second outline line forming an outline intersect each other, wherein a top portion forming surface forming the top portion has a plurality of impact resistant portions arranged in a honeycomb structure and disposed in a hexagonal cone shape below the level of the top portion forming surface.
The present invention relates to an exterior case for accommodating a battery, including an exterior case having a top portion where a first outline line forming an outline intersects with a second outline line, and having: a plurality of impact resistant portions extending obliquely at an angle between the first profile line and the second profile line and below flush with respect to the top formation surface; and a plurality of groove portions forming the plurality of impact resistant portions.
The present invention relates to an exterior case for accommodating a battery, including an exterior case having a top portion where a first outline line forming an outline intersects with a second outline line, and having: a hexagonal-shaped plurality of impact-resistant sections arranged in a honeycomb structure and below flush with the top-constituting surface; and a groove portion forming the plurality of impact resistant portions.
The present invention relates to an exterior case for battery accommodation, which includes an exterior case having a top portion where a first outline line and a second outline line forming an outline intersect each other, and a top portion forming surface forming the top portion has a plurality of impact resistant portions arranged in a honeycomb structure and provided in a hexagonal cone shape below the level of the top portion forming surface.
Effects of the invention
According to the present invention, the impact resistance can be improved including the outer case without providing an additional member.
Drawings
Fig. 1 is a perspective view showing an example of a configuration of a battery pack to which the present invention can be applied.
Fig. 2 is a perspective view showing an example of the configuration inside the outer case.
Fig. 3 is a graph showing an example of the relationship between the sheet thickness of the outer case and the rate of increase in the bending strength.
Fig. 4 is a perspective view showing a first configuration example of the top portion in the first embodiment.
Fig. 5 is a plan view showing a first configuration example of the ceiling portion in the first embodiment.
Fig. 6 is a perspective view showing a second configuration example of the top portion in the first embodiment.
Fig. 7 is a plan view showing a second configuration example of the ceiling portion in the first embodiment.
Fig. 8 is a graph showing an example of the relationship between the angle of the groove portion and the strain energy reduction rate.
FIG. 9 is a graph showing an example of the relationship between the depth of a groove and the strain energy reduction rate.
Fig. 10 is a graph showing an example of the relationship between the respective pitches of the impact resistant portion, the groove portion, and the coupling portion and the strain energy reduction rate.
Fig. 11 a, 11B, 11C, 11D, and 11E are explanatory views for explaining a state in which the battery pack is dropped.
Fig. 12 is an explanatory diagram for explaining an example of the simulation condition.
Fig. 13 is an enlarged perspective view showing an example of the configuration of the top portion in the second embodiment.
Fig. 14 is a partial schematic plan view showing a configuration example of the ceiling portion in the second embodiment.
Fig. 15 is an enlarged perspective view showing an example of the configuration of the top portion in the third embodiment.
Fig. 16 is a partial schematic plan view showing a configuration example of the ceiling portion in the third embodiment.
Fig. 17 is a schematic diagram of an electric power tool as an application example.
Fig. 18 is a schematic diagram of a hybrid vehicle as an application example.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described below are suitable specific examples of the present invention, and various technically preferable limitations are added thereto, but the scope of the present invention is not limited to these embodiments unless specifically described in the following description to limit the meaning of the present invention. In the present specification, "a to B" indicating a numerical range includes a lower limit value a and an upper limit value B. The present invention is explained in the following order.
< 1. first embodiment >
< 2. second embodiment >
< 3. third embodiment >
< 4. modification
< 5. application example >
< 1. first embodiment >
[ constitution of Battery pack ]
Fig. 1 is a perspective view showing an example of a configuration of a battery pack to which the present invention can be applied. The battery pack 1 shown in fig. 1 includes an outer case 2 forming the outer shape of the battery pack 1, and is configured in a substantially rectangular parallelepiped shape. The outer case 2 is formed of a material suitable for the use as a battery case. For example, the outer case 2 is molded using a resin material such as a resin monomer of Polycarbonate (PC), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), or acrylonitrile-butadiene-styrene copolymer resin (ABS), or an alloy resin or a blend resin of two or more of these. In the following description, the positional relationship between the upper, lower, left, right, and front and rear of the outer case 2 is basically expressed with reference to the case of fig. 1.
Fig. 2 is a perspective view showing an example of the structure inside the outer case 2. As shown in the drawing, the outer case 2 is configured by a rectangular parallelepiped box-shaped bottom case 2A having an opening in a top face (upper face) portion, and a lid-shaped top case 2B attached to the bottom case 2A by case fixing screws 3 so as to cover the opening. As shown, the bottom case 2A has 5 outer surfaces forming an outline. Specifically, bottom case 2A has front surface portion 20A as a front (specifically, right-near side) outer surface, bottom surface portion 20B as a lower side outer surface, left surface portion 20C as a left side outer surface, right surface portion 20D as a right side outer surface, and back surface portion 20E as a rear side outer surface.
Further, the bottom case 2A has top portions 21 at four corners of the lower portion side, respectively. The bottom case 2A has a rectangular parallelepiped shape, and therefore, the top 21 is formed by 3 surfaces. For example, top portion 21 (a portion encircled by a one-dot chain line) located in front of the left in fig. 2 is formed by front surface portion 20A, bottom surface portion 20B, and left surface portion 20C.
The outer case 2 has a thickness that can withstand normal impact and allows for weight reduction. Fig. 3 is a graph showing an example of the relationship between the plate thickness and the bending strength of the outer case 2. As shown in fig. 3, the thicker the thickness of the outer case 2, the higher the bending strength of the plate material. In particular, the effect is large at 2.0mm or more, and when it exceeds 4.0mm, there is no large increase in bending strength, and the moldability is rather deteriorated. Therefore, for example, the thickness of the outer case 2 is preferably in the range of 2.0mm to 4.0 mm.
As shown in fig. 2, a plurality of batteries 4, for example, rechargeable secondary batteries such as lithium ion batteries, an upper battery holder 5A and a lower battery holder 5B that fix the batteries 4 so as to sandwich the batteries 4 from above and below, battery connection tabs 6 that electrically connect the plurality of batteries 4 fixed thereby, and a circuit board (not shown), and the like are housed in the outer case 2. The battery 4 may be a disposable primary battery. By having such a configuration, the battery pack 1 is configured to be able to supply electric power of the plurality of batteries 4 to electric/electronic devices and the like for use via connection means such as connection terminals exposed from the outer case 2.
The battery pack 1 is not limited to use in a specific application. For example, the present invention can be applied to a battery pack for electric/electronic devices such as electric tools, electric vehicles, vacuum cleaners, telephones, notebook computers, smartphones, and toys. That is, the type, number, storage structure, and the like of the battery stored therein can be appropriately selected according to the application, the specification, and the like.
[ impact-resistant Structure ]
An impact-resistant structure for preventing breakage due to an impact such as dropping is formed at each of the top portions 21 described above, for example, by surface processing based on molding. Specifically, the impact-resistant structure is formed by recessing a portion of the outer surface forming the top 21.
(first embodiment of impact-resistant Structure)
Fig. 4 and 5 are views showing a first configuration example of the top portion 21 (a portion encircled by a one-dot chain line) positioned on the left front side in fig. 2. Fig. 4 is a perspective view of the top portion 21, and fig. 5 is a plan view of the top portion 21 as viewed from the front surface portion 20A side. Here, an impact-resistant structure formed on the front surface portion 20A will be described, in which the front surface portion 20A is one of outer surfaces (top surface components) constituting the top portion 21 shown in fig. 5, and the other top surface components, that is, the bottom surface portion 20B and the left surface portion 20C, have the same structure.
As shown in fig. 4, the bottom case 2A has an impact resistant structure including an impact resistant portion 22 and a groove portion 23, and when an impact is applied to the top portion 22, the impact resistant portion 25 mainly functions to resist the impact, and the groove portion 23 forms the impact resistant portion 22. The impact-resistant structure formed by the impact-resistant portion 22 and the groove portion 23 is formed not on the entire outer surface (for example, the front surface portion 20A) forming the top portion 21 but in a range of a part (for example, 10% to 30% of the outer surface) capable of absorbing an impact. This is to consider the reduction in impact resistance when an impact is applied from another direction. The impact-resistant structure is not limited to the square shape as shown in the drawing, and may be formed in a fan shape or the like with the projecting end of the top portion 21 as the center.
As shown in fig. 5, top 21 is a portion where 2 outline lines L1, L2 that form the outline of bottom case 2A in plan view and have mutually different extending directions intersect. In the rectangular parallelepiped bottom case 2A, the outline lines L1 and L2 may be formed by ridge lines formed at the boundaries between the front surface portion 20A and the bottom surface portion 20B and between the front surface portion 20A and the left surface portion 20C, respectively. The top portion 21 is not limited to the shape of the protruding tip, and the tip may be cut off by an R-chamfer, a C-chamfer, or the like as shown in the drawing. The same applies to the boundary between the top-portion constituting surfaces.
In the present embodiment, the angle formed by the 2 outline lines L1 and L2, that is, the angle of the top 21 when viewed from above is 90 °. Further, as shown in fig. 4 and 5, on the front surface portion 20A constituting the ceiling portion 21, there are formed: a plurality of impact resistant portions 22 extending obliquely at an angle between profile line L1 and profile line L2 and below flush with front surface portion 20A; and a plurality of grooves 23 forming the plurality of impact resistant portions 22.
That is, the impact resistant portion 22 is formed by forming a plurality of groove portions 23 in the front surface portion 20A. The plurality of grooves 23 are formed obliquely at an angle between the outline L1 and the outline L2. By forming the plurality of grooves 23 in this manner, the plurality of impact resistant portions 22 can be easily formed. Specifically, the plurality of groove portions 23 are each provided extending obliquely with respect to the outline L1 in the direction along the load direction D of collision with the apex portion 21. Since the range of the load direction D with respect to the outline L1 when the impact is made from the apex 21 is within the range of the angle formed by the outlines L1 and L2, the angle θ of the groove 23 with respect to the outline L1 is in the range of 0 ° < θ < 90 °. In other words, the plurality of groove portions 23 extend obliquely to the outline L1 in a direction along the reference line BL bisecting the angle in the plan view. In other words, the plurality of groove portions 23 are formed to extend from one end portion on the side close to the intersection of the 2 outer lines L1, L2 to the other end portion in the direction away from both the outer lines L1, L2.
Specifically, at least one groove portion 23 of the plurality of groove portions 23 is formed in the front surface portion 20A at an angle (an angle that approximately bisects an angle formed by the outline line L1 and the outline line L2) that approximately bisects an angle formed by the outline line L1 and the outline line L2 (an angle of 90 ° in plan view in the present embodiment). Here, the substantially bisected angle means an angle within a predetermined range (for example, plus or minus 5 °) with respect to the bisected angle (for an angle of 90 °, in the case of plus or minus 5 °, the substantially bisected angle means an angle within a range of 40 ° to 50 °). This makes it possible to form a structure having a high impact resistance in a well-balanced manner.
More specifically, as shown in the drawing, the plurality of grooves 23 are each configured to extend straight, i.e., linearly, and are formed parallel to the load direction D (or the reference line BL) at uniform intervals of 45 °. That is, the plurality of groove portions 23 are formed so that the angle θ with the outline L1 is 45 °. Thereby, a plurality of impact resistant portions 22 that extend obliquely at an angle between the outline line L1 and the outline line L2 (specifically, extend obliquely with respect to the outline line L1 in a direction along the load direction D of the collision with the ceiling 21 (or the reference line BL)) and are flush with the front surface portion 20A are formed between the groove portions 23. The cross-sectional shape of the groove 23 is not particularly limited, and is appropriately selected from groove shapes such as a V shape, an コ shape, and a U shape.
(second embodiment of impact-resistant Structure)
The impact-resistant structure may be the structure described below. Fig. 6 and 7 are views showing a second configuration example of the top portion 21 (a portion encircled by a one-dot chain line) located on the left front side in fig. 2. Fig. 6 is a perspective view of the ceiling portion 21, and fig. 7 is a schematic plan view of the ceiling portion 21 as viewed from the front surface portion 20A side. The same elements as those in the first specific example are denoted by the same reference numerals. Here, an impact-resistant structure formed on the front surface portion 20A will be described, in which the front surface portion 20A is one of outer surfaces (top surface components) constituting the top portion 21 shown in fig. 7, and the other top surface components, that is, the bottom surface portion 20B and the left surface portion 20C, have the same structure.
As shown in fig. 6, in this example, bottom case 2A has impact-resistant structure including impact-resistant portion 22, groove portion 23, and coupling portion 24, and when an impact is applied to top portion 22, impact-resistant portion 25 mainly functions to resist the impact, groove portion 23 forms impact-resistant portion 22, and coupling portion 24 functions to absorb the impact. The point of having the coupling portion 24 is different from the first specific example, and the other configurations are the same as the first specific example. That is, the impact-resistant structure formed by the impact-resistant portion 22, the groove portion 23, and the coupling portion 24 is formed not on the entire outer surface (for example, the front surface portion 20A) forming the ceiling portion 21 but in a range of a part (for example, 10% to 30% of the outer surface) capable of absorbing an impact. The impact-resistant structure is not limited to the square shape as shown in the drawing, and may be formed in a fan shape or the like along the coupling portion 24.
As shown in fig. 7, top 21 is a portion where 2 outline lines L1, L2 that form the outline of bottom case 2A in plan view and have mutually different extending directions intersect. In the rectangular parallelepiped bottom case 2A, the outline lines L1 and L2 may be formed by ridge lines formed at the boundaries between the front surface portion 20A and the bottom surface portion 20B and between the front surface portion 20A and the left surface portion 20C, respectively. The top portion 21 is not limited to the shape of the protruding tip, and the tip may be cut off by an R-chamfer, a C-chamfer, or the like as shown in the drawing. The same applies to the boundary between the top-portion constituting surfaces.
As described above, in the present embodiment, the angle formed by the 2 outside lines L1 and L2, that is, the angle of the top 21 in plan view is 90 °. Further, as shown in fig. 6 and 7, on the front surface portion 20A constituting the ceiling portion 21, there are formed: a plurality of impact resistant portions 22 extending obliquely at an angle between profile line L1 and profile line L2 and being below flush with front surface portion 20A; and a plurality of grooves 23 forming the plurality of impact resistant portions 22.
That is, the impact resistant portion 22 is formed by forming a plurality of groove portions 23 in the front surface portion 20A. The plurality of grooves 23 are formed obliquely at an angle between the outline L1 and the outline L2. By forming the plurality of grooves 23 in this manner, the plurality of impact resistant portions 22 can be easily formed. Specifically, the plurality of groove portions 23 are each provided extending obliquely with respect to the outline L1 in the direction along the load direction D of collision with the apex portion 21. Since the range of the load direction D with respect to the outline L1 when the impact is made from the apex 21 is within the range of the angle formed by the outlines L1 and L2, the angle θ of the groove 23 with respect to the outline L1 is in the range of 0 ° < θ < 90 °. In other words, the plurality of groove portions 23 extend obliquely to the outline L1 in a direction along the reference line BL bisecting the angle in the plan view. In other words, the plurality of groove portions 23 are formed to extend from one end portion on the side close to the intersection of the 2 outer lines L1, L2 to the other end portion in the direction away from both the outer lines L1, L2.
Specifically, at least one groove portion 23 of the plurality of groove portions 23 is formed in the front surface portion 20A at an angle (an angle that approximately bisects an angle formed by the outline line L1 and the outline line L2) that approximately bisects an angle formed by the outline line L1 and the outline line L2 (an angle of 90 ° in plan view in the present embodiment). Here, the substantially bisected angle means an angle within a predetermined range (for example, plus or minus 5 °) with respect to the bisected angle (for an angle of 90 °, in the case of plus or minus 5 °, the substantially bisected angle means an angle within a range of 40 ° to 50 °). This makes it possible to form a structure having a high impact resistance in a well-balanced manner.
More specifically, as shown in the drawing, the plurality of grooves 23 are each configured to extend straight, i.e., linearly, and are formed parallel to the load direction D (or the reference line BL) at uniform intervals of 45 °. That is, the plurality of groove portions 23 are formed so that the angle θ with the outline L1 is 45 °. Thereby, a plurality of impact resistant portions 22 that extend obliquely at an angle between the outline line L1 and the outline line L2 (specifically, extend obliquely with respect to the outline line L1 in a direction along the load direction D of the collision with the ceiling 21 (or the reference line BL)) and are flush with the front surface portion 20A are formed between the groove portions 23. The cross-sectional shape of the groove 23 is not particularly limited, and is appropriately selected from groove shapes such as a V shape, an コ shape, and a U shape.
In the groove portion 23, a plurality of coupling portions 24 are formed, and the plurality of coupling portions 24 linearly couple the plurality of impact resistant portions 22 from a portion on the outer shape line L1 to a portion on the outer shape line L2 (specifically, coupled at intervals to each other in a line that bulges in the load direction D of the collision), and are flush with the front surface portion 20A. For example, as shown in fig. 7, the plurality of coupling portions 24 couple the plurality of impact resistant portions 22 to each other so as to be arranged at uniform intervals in a concentric circle shape with the intersection of the outline lines L1 and L2 as the center.
[ details of the respective structures ]
Fig. 8 is a graph showing an example of the relationship between the angle of the groove portion 23 and the strain energy decrease rate (the decrease rate of the strain energy density). Here, the strain energy density is a value calculated by the sum of the stress × strain energy calculated in the elastic/plastic region per unit volume. The graph shown in fig. 8 is a graph in which the falling direction is inclined at 45 ° with respect to the bottom side of the outer case 2, that is, the bottom surface portion 20B (see fig. 2). As shown in fig. 8, when the groove portion 23, that is, the straight running angle of the impact resistant portion 22 is dropped at an angle of 45 ° with respect to the bottom side of the outer case 2 in the dropping direction, the strain energy reduction rate becomes highest when the inclination of 45 ° with respect to the outline line L1 which is the same vector as the direction of the dropping collision load is present. Therefore, for example, the straight running angle θ between the groove portion 23 and the impact resistant portion 22 is preferably well balanced when it is 45 ° as described above.
Fig. 9 is a graph showing an example of the relationship between the depth of the groove portion 23 and the strain energy reduction rate. For example, when the thickness is 4mm, if the depth of the groove portion 23 is less than 0.5mm as shown in the figure, the effect is not great and the shape is difficult to mold. That is, stable processing of the mold processing becomes difficult. When the thickness is larger than 3mm, the residual thickness becomes too thin, and the effect is not obtained. Therefore, for example, the depth of the groove 23 is preferably in the range of 0.5mm to 3 mm.
Fig. 10 is a graph showing an example of the relationship between the respective pitches of the impact resistant portion 22, the groove portion 23, and the coupling portion 24 and the strain energy reduction rate. When the pitch between the impact resistant portion 22 and the coupling portion 24 is less than 1.0mm, it is difficult to mold the shape. That is, stable processing of the mold processing is difficult. In addition, when the pitch is set to be larger than 3mm, the strain energy reducing effect is reduced. Therefore, the respective pitches are preferably in the range of 1.0mm to 3.0mm, for example.
The thickness (width) of each of the impact resistant portion 22 and the coupling portion 24 is preferably set to be, for example, in a range of 0.5mm to 2.5mm in view of moldability. Further, as the number of impact resistant portions 22 increases, the impact resistance can be improved, and therefore, it is preferable to form the impact resistant structure in the formation region as many as possible.
[ State upon impact ]
Fig. 11 a to 11E are explanatory views for explaining a state in which the battery pack 1 is dropped. As shown in the drawing, when the battery pack 1 falls from the top portion 21 to the falling surface as shown in fig. 11 a to 11E, first, the protruding portion of the top portion 21, that is, the corner of the tip end collides (fig. 11 a). Then, due to the collision, the protrusions formed at the corners of the tip (the protrusions at the end portions of the impact resistant portion 22 and the coupling portion 24) are deformed, and the energy due to the collision is absorbed (B in fig. 11). At this time, the deformation of the top portion 21 is suppressed due to the rigidity of the impact resistant portion 22 (C in fig. 11). When a strong impact is applied, the coupling portion 24 receives an impact load and disperses energy due to the collision (D in fig. 11). When a larger load is applied, the coupling portion 24 deforms in order from the side of the projecting portion close to the apex portion 21, and absorbs energy due to the collision (E in fig. 11). This can prevent the outer case 2 of the base material from being broken.
[ test examples ]
The inventors of the present application specifically calculated the reduction rate of the strain energy density achieved by providing the impact resistant structure of the impact resistant portion 22 and the coupling portion 24 through simulation. As the simulation, a finite element method is used. The conditions of the simulation are shown below.
< simulated Condition >
Weight of the battery pack 1: 3kg of
Drop height: 1m
Drop direction: rotated by 45 ° in the horizontal direction and inclined by 45 ° in the vertical direction with respect to the bottom surface
(refer to FIG. 12 in detail)
Shell thickness: 3.0mm
Groove angle θ: 45 degree
Groove spacing: 2.0mm
Width of the groove: 1.0mm
Groove depth: 1.5mm
Under these conditions, it was confirmed that the strain energy density generated when the container was dropped was four times lower than that of an exterior case of the same material and the same shape which was not processed.
As described above, according to the battery pack 1 of the first embodiment of the present invention, since the outer case 2 has the impact resistant portion 22, even when an impact is applied to the top portion 21 of the outer case 2 by dropping from the top portion 21 or the like, the impact can be resisted by the rigidity of the impact resistant portion 22. That is, by providing the impact resistant portion 22 extending obliquely at an angle between the outline L1 and the outline L2, the rigidity can be improved against the impact force, and the deformation can be suppressed. In the case of the second specific example, the outer case 2 has the coupling portion 24, and therefore, the shock can be absorbed. That is, when an impact is applied, the coupling portion 24 is sequentially deformed, and collision energy can be absorbed. This can prevent breakage such as cracking of the outer case 2. That is, the impact resistance including the outer case 2 can be improved.
In the battery pack 1, the impact-resistant portion 22 and the coupling portion 24 are formed flush with the top-surface-constituting surface, such as the front surface portion 20A, only by forming the groove portion 23 on the top-surface-constituting surface, and therefore, the impact resistance due to dropping or the like can be improved without changing the outer dimensions of the outer case 2, that is, the battery pack 1, or adding a cushioning member. Thus, the impact resistance can be improved without increasing the cost and weight of the additional member.
Further, since the impact resistance against an impact on the top portion 21 caused by dropping from the top portion 21 can be improved by forming the impact resistant portion 22 and the coupling portion 24 on the top portion formation surface such as the front surface portion 20A, even a resin material having a low material impact strength can be used as the material of the outer case 2.
< 2. second embodiment >
Next, a second embodiment of the present invention will be explained. This embodiment is different from the impact-resistant structure of the first embodiment. The other configurations are the same as those of the first embodiment. Therefore, the impact-resistant structure, which is a different point, will be mainly described with reference to fig. 2 used in the first embodiment.
[ impact-resistant Structure ]
The outer case 2 (see fig. 2) in the present embodiment is formed of a material suitable for use as a battery case, as in the first embodiment. For example, the outer case 2 is molded using a resin material such as a resin monomer of Polycarbonate (PC), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), or acrylonitrile-butadiene-styrene copolymer resin (ABS), or an alloy resin or a blend resin of two or more of these. The outer case 2 has a thickness that can withstand normal impact and allows for weight reduction. For example, the thickness of the outer case 2 is preferably in the range of 2.0mm to 4.0 mm.
In the present embodiment, an impact-resistant structure for preventing breakage due to an impact such as dropping is formed at each of the top portions 21 shown in fig. 2 by, for example, surface processing by molding. Fig. 13 is an enlarged perspective view showing an example of the configuration of the top portion 21 (a portion encircled by a one-dot chain line) positioned on the left near side in fig. 2 in the present embodiment. Fig. 14 is a schematic plan view showing a part thereof. Although the impact-resistant structure formed on front surface portion 20A is also described here, the other top-portion constituting surfaces, that is, bottom surface portion 20B and left surface portion 20C, have the same structure.
As shown in fig. 13 and 14, bottom case 2A in the present embodiment has impact-resistant portions 25 and groove portions 26 as an impact-resistant structure, and when an impact is applied to top portion 21, impact-resistant portions 25 mainly function to resist the impact, and groove portions 26 mainly function to absorb the impact.
The impact resistant portion 25 is constituted by a plane of hexagonal shape (specifically, regular hexagonal shape) flush with the front surface portion 20A. The groove 26 forms the contour of the hexagonal impact resistant portion 25. In the front surface portion 20A, the plurality of impact resistant portions 25 are formed in a closest-packed structure so as to be regularly arranged in a honeycomb structure. That is, as shown in fig. 14, 1 side of the adjacent blocks (the impact resistant portions 25 adjacent to each other) is provided in common with each other. As described above, bottom case 2A of the present embodiment has, on a top-constituting surface (for example, front surface portion 20A) constituting top 21: a plurality of impact resistant portions 25 of hexagonal shape arranged in a honeycomb structure and flush with respect to the front surface portion 20A; and a groove portion 26 forming the plurality of impact resistant portions 25.
Here, the length L3 of one side of the hexagonal shape constituting the groove portion 26 is preferably in the range of, for example, 1.0mm to 3.0 mm. In order to prevent the occurrence of cracks due to insufficient strength, the depth of the groove constituting the groove portion 26 is preferably less than half the thickness of the plate, specifically, in the range of 0.2mm to 1.0mm, and the width of the groove is preferably in the range of 0.1mm to 0.5 mm.
In the battery pack 1 having the outer case 2 configured as described above, when the top portion 21 collides with a falling surface or the like due to the falling from the top portion 21 or the like, the deformation of the top portion 21 is suppressed by the rigidity of the impact resistant portion 25 formed of a hexagonal flat surface. Further, the groove 26 forming the contour of the impact resistant portion 25 is subjected to necking deformation, thereby absorbing energy due to collision. This can prevent the outer case 2 of the base material from being broken.
From the same conditions as in the first embodiment, it is understood that the reduction rate of the strain energy density is calculated by simulation, and under each of the above conditions, the strain energy density generated when the case is dropped can be reduced as compared with the case made of the same material and the same shape without processing.
As described above, according to the assembled battery 1 of the second embodiment of the present invention, as in the first embodiment, the impact resistance can be improved including the outer case 2 without providing an additional member. The impact resistant portions 25, which are formed of hexagonal flat surfaces having a shape that is not directional but strong in all directions, are connected to each other so as to share one side of the groove portions 26 forming the contour thereof, and therefore, when subjected to stress by impact, they repel each other in both directions, and the rigidity of the plate material can be improved regardless of the direction in which the impact is applied. Further, since the groove portions 26 are provided, energy can be absorbed by neck deformation of the groove portions 26 when a stress is applied, for example, when an impact is applied when the vehicle is dropped. In addition, when the impact-resistant structure is formed by die molding, the mold shape for molding can be configured to be a simple convex shape for forming the groove portion 26, and thus the mold structure and maintenance can be simplified.
< 3. third embodiment >
Next, a third embodiment of the present invention will be explained. This embodiment is different from the impact-resistant structure of the first and second embodiments described above. The other configurations are the same as those of the first and second embodiments described above. Therefore, the impact-resistant structure will be mainly described herein as a different point with reference to fig. 2 used in the first embodiment.
[ impact-resistant Structure ]
The outer case 2 (see fig. 2) in the present embodiment is formed of a material suitable for use as a battery case, as in the first and second embodiments. For example, the outer case 2 is molded using a resin material such as a resin monomer of Polycarbonate (PC), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), or acrylonitrile-butadiene-styrene copolymer resin (ABS), or an alloy resin or a blend resin of two or more of these. The outer case 2 has a thickness that can withstand normal impact and allows for weight reduction. For example, the thickness of the outer case 2 is preferably in the range of 2.0mm to 4.0 mm.
In the present embodiment, an impact-resistant structure for preventing breakage due to an impact such as dropping is formed at each of the top portions 21 shown in fig. 2 by, for example, surface processing by molding. Fig. 15 is an enlarged perspective view showing an example of the configuration of the top portion 21 (a portion encircled by a one-dot chain line) positioned on the left near side in fig. 2 in the present embodiment. Fig. 16 is a schematic plan view showing a part thereof. Although the impact-resistant structure formed on front surface portion 20A is also described here, the other top-portion constituting surfaces, that is, bottom surface portion 20B and left surface portion 20C, have the same structure.
As shown in fig. 15 and 16, bottom case 2A in the present embodiment has impact resistant portion 27 and coupling portion 28 as an impact resistant structure, and when an impact is applied to top portion 21, impact resistant portion 27 mainly functions to resist the impact, and coupling portion 28 mainly functions to mitigate the impact.
Impact resistant portion 27 and coupling portion 28 have a shape that recesses front surface portion 20A. The impact resistant portion 27 is configured as a hexagonal cone shape (specifically, a regular hexagonal cone shape) in which the height of the protruding portion is flush with respect to the front surface portion 20A. Specifically, the impact resistant portion 27 is constituted by a protruding regular hexagonal cone having a planar protruding end portion 27A at the protruding end flush with the front surface portion 20A. The protruding end portion 27A is not limited to such a configuration. For example, the projecting end 27A is not limited to a flat shape, and may be a curved shape or a projecting shape. The coupling portion 28 forms a hexagonal contour of the bottom surface of the impact resistant portion 27, and couples the plurality of impact resistant portions 27.
A plurality of impact resistant portions 27 are formed on the front surface portion 20A so as to be regularly arranged in a honeycomb structure. That is, as shown in fig. 16, the coupling portion 28 is formed so that 1 side of the contour of the bottom surfaces of adjacent blocks (the impact resistant portions 27 adjacent to each other) is shared with each other. In this way, the bottom case 2A of the present embodiment has a plurality of impact resistant portions 27 arranged in a honeycomb structure and arranged in a hexagonal cone shape flush with the top constituting surface (for example, the front surface portion 20A) constituting the top 21. In fig. 15, frame-shaped frame portions are formed between front surface portion 20A and bottom surface portion 20B and between front surface portion 20A and left surface portion 20C, but this is not necessarily required, and impact resistant portions 27 may be disposed continuously and adjacently between the top surface forming surfaces.
Here, the length L4 of one side constituting the bottom surface of the impact resistant section 27 is preferably in the range of, for example, 1.0mm to 3.0 mm. For example, the height of impact-resistant portion 27 (the depth of the recess from front surface portion 20A to coupling portion 28) is preferably in the range of 0.2mm to 1.0mm, and the width of coupling portion 28 is preferably in the range of 0.1mm to 0.5 mm.
In the battery pack 1 having the outer case 2 configured as described above, when the top portion 21 collides with a falling surface or the like due to the falling from the top portion 21 or the like, the deformation of the top portion 21 is suppressed by the rigidity of the impact resistant portion 27 having the hexagonal bottom surface. At this time, by providing thin coupling portion 28 forming the outline of impact resistant portion 27, top portion 21 is flexed, and energy due to collision is mitigated. This can prevent the outer case 2 of the base material from being broken.
From the same conditions as in the first embodiment, it is understood that the reduction rate of the strain energy density is calculated by simulation, and under each of the above conditions, the strain energy density generated when the case is dropped can be reduced as compared with the case made of the same material and the same shape without processing.
As described above, according to the assembled battery 1 of the third embodiment of the present invention, as in the first embodiment, the impact resistance can be improved including the exterior case 2 without causing an increase in cost and weight due to additional members. By forming the shock resistant sections 27 in a mountain shape (a convex shape) having a hexagonal bottom surface having no directivity and being strong in all directions and connecting them so as to share one side of the connecting sections 28 forming the contour of the bottom surface of each shock resistant section 27, the shock resistant sections are repelled from each other in both directions when receiving stress caused by shock, and the rigidity as a plate material can be improved regardless of the direction in which the shock is applied. Further, by forming the height of the apex of the impact resistant portion 27 so as not to protrude from the peripheral wall surface, that is, the top-portion constituting surface (for example, the front surface portion 20A), when a surface drop occurs, that is, when a drop occurs in a direction in which the top-portion constituting surface (for example, the front surface portion 20A) is parallel to the drop surface, it is possible to avoid collision between the apex of the impact resistant portion 27 and the drop surface, and it is possible to form the exterior case 2 which is resistant to the drop from the top portion 21 and the drop of the surface. Further, since the thin groove portion is not provided, local necking deformation (for example, bending at the groove portion when the groove portion is present) due to the thin portion is less likely to occur, and a structure having a stronger directivity can be formed.
< 4. 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 embodiments, and various modifications are possible. For example, the number and positions of the apexes 21 having the impact-resistant structure described above are not limited to those described above. That is, the shape of the outer case 2 is not limited to the above. The exterior case to which the present invention can be applied may have 1 or more top portions formed of top portion formation surfaces. The number of the top constituting faces forming the top is not limited to 3.
For example, in each of the above embodiments, the impact-resistant structure is provided on all the outer surfaces forming the top portion 21, but the present invention is not limited thereto, and the impact-resistant structure may be formed on any 1 or more surfaces forming the top portion 21. The impact-resistant structure in each embodiment may be formed on the inner surface of the outer case 2 instead of the outer surface, or may be formed on both the outer surface and the inner surface.
For example, the impact resistant portion 22 and the coupling portion 24 in the first embodiment, the impact resistant portion 25 in the second embodiment, and the protruding end portion 27A in the third embodiment have a configuration flush with the ceiling structure surface (for example, the front surface portion 20A), but the present invention is not limited thereto, and may be formed flush with or below the ceiling structure surface. That is, the top portion constituting surface may be formed so as not to protrude from the top portion constituting surface and be located closer to the inner surface than the flush surface of the top portion constituting surface.
For example, in the first embodiment, the configuration in which the angle θ formed with the outline L1 is 45 ° is shown as an example of the configuration of the groove portion 23 and the impact resistant portion 22, but the present invention is not limited thereto. For example, a drop angle corresponding to the center of gravity of the battery pack 1 may be assumed and set to an angle corresponding thereto. The groove portions 23 and the impact resistant portions 22 are not limited to being provided at a uniform pitch, and for example, the groove portions 23 and the impact resistant portions 22 may be provided so as to radially spread from the intersection side of the outer contour lines L1 and L2. Further, the groove portion 23 and the impact resistant portion 22 are configured to extend linearly, but the present invention is not limited thereto, and may be configured to extend in a curved shape or an elliptical arc shape to the extent that rigidity is maintained, or may be configured to extend in combination of these structures.
For example, in the first embodiment, the configuration of the coupling portion 24 is illustrated as a configuration in which the plurality of impact resistant portions 22 are coupled at regular intervals in a regular circular arc shape centered on the intersection of the outer lines L1 and L2, but the present invention is not limited thereto, and may be a configuration in which the impact resistant portions are coupled in an elliptical arc shape or a curved shape other than the regular circular arc shape, and the center position is not limited to the intersection. Further, the plurality of impact resistant portions 22 may be connected linearly or connected in a wavy manner, or the intervals between the plurality of connecting portions 24 may be changed.
< 5. application example >
[ electric Power tool as an application example ]
Hereinafter, an electric power tool 500 including any one of the battery packs 1 according to the first to third embodiments and the modifications thereof will be described with reference to fig. 17.
The electric power tool 500 is, for example, an electric drill, and includes a control unit 502 and a power source 503 inside a tool body 501 made of a plastic material or the like. A drill 504 as a movable portion is mounted to the tool body 501 so as to be operable (rotatable), for example.
The control unit 502 controls the operation of the entire electric power tool (including the use state of the power source 503), and includes, for example, a CPU. The power source 503 includes 1 or 2 or more of the battery packs 1 according to the first to third embodiments and the modifications thereof. The control unit 502 supplies electric power from the power source 503 to the drill 504 in response to an operation of an operation switch, not shown.
[ hybrid vehicle as an application example ]
A vehicle power storage system including any one of the battery packs 1 according to the first to third embodiments and the modifications thereof will be described below.
Fig. 18 schematically shows the configuration of a hybrid vehicle that employs a series hybrid system as a vehicle power storage system. The series hybrid system is a system that runs by an electric power drive force conversion device using electric power generated by a generator started by an engine or electric power obtained by temporarily storing the electric power in a battery.
This hybrid vehicle 600 is equipped with an engine 601, a generator 602, an electric power/driving force conversion device 603, driving wheels 604a, driving wheels 604b, wheels 605a, wheels 605b, a power storage device 608, a vehicle control device 609, various sensors 610, and a charging port 611. The power storage device 608 includes 1 or 2 or more of the battery packs 1 according to the first to third embodiments and the modifications thereof.
The rotational force of the engine 601 is transmitted to the generator 602, and the electric power generated by the generator 602 using the rotational force can be stored in the power storage device 608.
When the hybrid vehicle is decelerated by a brake mechanism not shown in the figure, resistance at the time of deceleration is applied to the electric power-driving force conversion device 603 as a rotational force, and regenerative electric power generated by the electric power-driving force conversion device 603 using the rotational force is stored in the power storage device 608.
The power storage device 608 is connected to an external power supply via the charging port 611, and can receive electric power supply from the external power supply using the charging port 611 as an input port and store the received electric power.
Although not shown in the drawings, an information processing device that performs information processing related to vehicle control based on information related to the secondary battery may be provided. As such an information processing device, for example, there is an information processing device that displays the remaining battery level based on information relating to the remaining battery level.
In the above application example, a series hybrid vehicle that runs by a motor using electric power generated by a generator that is started by an engine or electric power obtained by temporarily storing the electric power in a battery has been described as an example, but a vehicle that can use a battery according to the present invention is not limited to this. For example, a parallel hybrid vehicle may be used in which an engine and a motor are used as drive sources and three modes of running only by the engine, running only by the motor, and running by the engine and the motor are appropriately switched, or an electric vehicle may be used in which running is performed by driving only the motor without using the engine.
Description of the reference numerals
1 … battery pack, 2 … outer case, 2A … bottom case, 20A … front surface, 20B … bottom surface, 20C … left surface, 21 … top, 22, 25, 27 … impact endurance part, 23, 26 … groove part, 24, 28 … connection part, load direction of D … collision, L1, L2 … outline line, 500 … electric tool, 600 … hybrid vehicle.
Claims (13)
1. A battery pack includes at least one battery and an outer case,
the exterior case has a top portion where a first outline line forming an outline intersects with a second outline line, and,
the top forming surface forming the top part is provided with: a plurality of impact resistant portions extending obliquely at an angle between the first profile line and the second profile line and below flush with respect to the top formation surface; and a plurality of groove portions forming the plurality of impact resistant portions.
2. The battery pack according to claim 1,
the plurality of groove portions are formed obliquely at an angle between the first outline and the second outline.
3. The battery pack according to claim 1,
at least one of the plurality of slots is formed at an angle that approximately bisects the angle formed by the first profile line and the second profile line.
4. The battery pack according to any one of claims 1 to 3,
the battery pack has a plurality of coupling portions that linearly couple between the plurality of impact resistant portions from a portion on the first outer shape line to a portion on the second outer shape line and are below flush with respect to the top formation surface.
5. The battery pack according to claim 4,
the plurality of coupling portions are formed at intervals from each other.
6. The battery pack according to claim 4 or 5,
the plurality of coupling portions are formed concentrically around an intersection of the first outline and the second outline.
7. A battery pack includes at least one battery and an outer case,
the exterior case has a top portion where a first outline line forming an outline intersects with a second outline line, and,
the top forming surface forming the top part is provided with: a hexagonal-shaped plurality of impact-resistant sections arranged in a honeycomb structure and below flush with the top-constituting surface; and a groove portion forming the plurality of impact resistant portions.
8. A battery pack includes at least one battery and an outer case,
the exterior case has a top portion where a first outline line forming an outline intersects with a second outline line, and,
the top forming surface forming the top has a plurality of impact resistant portions arranged in a honeycomb structure and arranged in a hexagonal cone shape below the level of the top forming surface.
9. An electric power tool having the battery pack according to any one of claims 1 to 8.
10. An electric vehicle having the battery pack according to any one of claims 1 to 8.
11. An outer case for accommodating a battery includes an outer case,
the exterior case has a top portion where a first outline line forming an outline intersects with a second outline line, and,
the top forming surface forming the top part is provided with: a plurality of impact resistant portions extending obliquely at an angle between the first profile line and the second profile line and below flush with respect to the top formation surface; and a plurality of groove portions forming the plurality of impact resistant portions.
12. An outer case for accommodating a battery includes an outer case,
the exterior case has a top portion where a first outline line forming an outline intersects with a second outline line, and,
the top forming surface forming the top part is provided with: a hexagonal-shaped plurality of impact-resistant sections arranged in a honeycomb structure and below flush with the top-constituting surface; and a groove portion forming the plurality of impact resistant portions.
13. An outer case for accommodating a battery includes an outer case,
the exterior case has a top portion where a first outline line forming an outline intersects with a second outline line, and,
the top forming surface forming the top has a plurality of impact resistant portions arranged in a honeycomb structure and arranged in a hexagonal cone shape below the level of the top forming surface.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-107015 | 2019-06-07 | ||
| JP2019107015 | 2019-06-07 | ||
| PCT/JP2020/022350 WO2020246595A1 (en) | 2019-06-07 | 2020-06-05 | Battery pack, electric tool, electric vehicle, and exterior case for storing battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113950770A true CN113950770A (en) | 2022-01-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080041848.2A Withdrawn CN113950770A (en) | 2019-06-07 | 2020-06-05 | Battery pack, electric tool, electric vehicle, and battery housing outer case |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113950770A (en) |
| WO (1) | WO2020246595A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115498346A (en) * | 2022-10-24 | 2022-12-20 | 厦门海辰储能科技股份有限公司 | Battery box hangers, battery box and battery cluster frame |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000021371A (en) * | 1998-07-03 | 2000-01-21 | Tookado:Kk | Battery pack |
| US20160118635A1 (en) * | 2014-10-27 | 2016-04-28 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Battery housing part |
| CN206271769U (en) * | 2016-11-23 | 2017-06-20 | 加百裕工业股份有限公司 | Battery container |
| CN207818665U (en) * | 2017-12-15 | 2018-09-04 | 广东特视能智能科技有限公司 | A kind of lithium ion battery charging and feeding device shell |
| CN208939028U (en) * | 2018-09-06 | 2019-06-04 | 东莞市月宇电子有限公司 | A kind of li battery shell of shatter-resistant |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1125939A (en) * | 1997-07-07 | 1999-01-29 | Fuji Elelctrochem Co Ltd | Battery pack |
| KR101201742B1 (en) * | 2010-11-05 | 2012-11-15 | 에스비리모티브 주식회사 | Battery module |
| JP2014067591A (en) * | 2012-09-26 | 2014-04-17 | Sanyo Electric Co Ltd | Battery pack |
| WO2015184647A1 (en) * | 2014-06-06 | 2015-12-10 | Techtronic Industries Company Limited | Blow molded container |
-
2020
- 2020-06-05 CN CN202080041848.2A patent/CN113950770A/en not_active Withdrawn
- 2020-06-05 WO PCT/JP2020/022350 patent/WO2020246595A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000021371A (en) * | 1998-07-03 | 2000-01-21 | Tookado:Kk | Battery pack |
| US20160118635A1 (en) * | 2014-10-27 | 2016-04-28 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Battery housing part |
| CN206271769U (en) * | 2016-11-23 | 2017-06-20 | 加百裕工业股份有限公司 | Battery container |
| CN207818665U (en) * | 2017-12-15 | 2018-09-04 | 广东特视能智能科技有限公司 | A kind of lithium ion battery charging and feeding device shell |
| CN208939028U (en) * | 2018-09-06 | 2019-06-04 | 东莞市月宇电子有限公司 | A kind of li battery shell of shatter-resistant |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115498346A (en) * | 2022-10-24 | 2022-12-20 | 厦门海辰储能科技股份有限公司 | Battery box hangers, battery box and battery cluster frame |
| CN115498346B (en) * | 2022-10-24 | 2023-09-15 | 厦门海辰储能科技股份有限公司 | Battery box hangers, battery box and battery cluster frame |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020246595A1 (en) | 2020-12-10 |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220118 |
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| WW01 | Invention patent application withdrawn after publication |