Power storage device, power storage system, electronic device, electric vehicle, and power system

1. A power storage device, comprising:

a plurality of battery block groups, wherein each of the plurality of battery block groups comprising a plurality of battery blocks, wherein each of the plurality of battery blocks comprising a plurality of battery cells, wherein the plurality of battery cells in each of the plurality of battery blocks are arranged in a first direction, wherein the plurality of battery blocks in each of the plurality of battery block groups are arranged in a second direction orthogonal to the first direction,

wherein the plurality of battery cells in each of the plurality of battery blocks is in a corresponding straight line, and

wherein the plurality of battery cells in each of the plurality of battery blocks are interconnected in parallel; and

a connection terminal electrically connected to terminal faces of the plurality of battery cells of a first battery block of the plurality of battery blocks,

wherein adjacent battery blocks of the plurality of battery blocks are in a straw bag arrangement,

wherein a first cut out is formed from an edge of the connection terminal in a third direction perpendicular to a longitudinal direction of the connection terminal,

wherein at least one second cut out is connected to the first cut out and is extended along the longitudinal direction of the connection terminal,

wherein the longitudinal direction of the connection terminal is substantially same as the first direction, and

wherein a position of the first cut out corresponds to a boundary between adjacent battery cells of the plurality of battery cells connected in parallel.

2. The power storage device according to claim 1 , wherein the connection terminal comprises a notch in a position that overlaps a space corresponding to at least one battery cell of the plurality of battery cells.

3. The power storage device according to claim 1 , wherein the connection terminal is electrically connected to the terminal faces of battery cells included in two adjacent battery blocks of the plurality of battery blocks.

4. The power storage device according to claim 1 , wherein the connection terminal is a plate-like body.

5. The power storage device according to claim 1 , wherein the connection terminal comprises a plurality of holes.

6. The power storage device according to claim 1 , wherein a shape of the first cut out is at least one selected from the group consisting of a rectangular shape, a curved shape, and a wavy shape.

7. The power storage device according to claim 1 , wherein the connection terminal further includes a plurality of the second cut outs formed at intervals along the longitudinal direction of the connection terminal.

8. The power storage device according to claim 7 , wherein an electrical resistance R t of a fusing unit which is a region between the plurality of second cut outs satisfies Mathematical Formula 1 below:

[

Mathematical

⁢

⁢

Formula

⁢

⁢

1

]

T

1

-

T

C

R

θ

⁢

I

1

2

(

1

-

e

-

t

1

CR

θ

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≦

R

t

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Δ

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T

0

R

θ

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I

0

2

,

(

1

)

wherein T 1 is a melting point in degrees Kelvin of the fusing unit,

wherein T C is a temperature in degrees Kelvin of an environment in which the power storage device is used,

wherein I 1 is a short-circuit current in Amperes flowing at a time of short-circuit of battery cells of at least one battery block of the plurality of battery blocks,

wherein C is a thermal capacity in Joules per degree Kelvin of the fusing unit,

wherein t 1 is a fusing time in seconds of the fusing unit in a case where the short-circuit current has flown, wherein t 1 =1 second,

wherein R θ is a thermal resistance in degrees Kelvin per Watts of the fusing unit and R θ =(1/λ)×(L/S),

wherein λ is a thermal conductivity in Watts per meter of a heat transfer unit in the connection terminal,

wherein L is a length in meters of the heat transfer unit,

wherein S is a cross-sectional area in square meters of the heat transfer unit,

wherein the electrical resistance R t of the fusing unit is in ohms and the electrical resistance R t =(1/σ)×(L′/S′),

wherein σ is an electric conductivity [1/Ω·m] of the fusing unit,

wherein L′ is a length of the fusing unit in meters,

wherein S′ is a cross-sectional area of the fusing unit in square meters,

wherein I 0 is a maximum current, in Amperes, of the power storage device, and

wherein Δ T0 is an upper limit of temperature rise of the connection terminal in degrees Kelvin.

9. A power storage device, comprising:

a plurality of battery blocks each including a plurality of battery cells arranged in a first direction, wherein the first direction is a longitudinal direction of the plurality of battery blocks;

a battery block group obtained by arranging the plurality of battery blocks in parallel in a second direction substantially perpendicular to the first direction,

wherein the plurality of battery cells in each of the plurality of battery blocks is in a corresponding straight line, and

wherein the plurality of battery cells in each of the plurality of battery blocks are interconnected in parallel; and

a connection terminal joined to terminal faces of the plurality of battery cells included in at least one of the plurality of battery blocks, the connection terminal disposed to be parallel to the first direction of the plurality of battery blocks,

wherein the connection terminal includes a fusing unit to be fused in a fusing time t 1 to intercept a maximum current I 0 , and

wherein an electrical resistance R t of the fusing unit satisfies Mathematical Formula 1:

[

mathematical

⁢

⁢

formula

⁢

⁢

1

]

T

1

-

T

C

R

θ

⁢

I

1

2

(

1

-

e

-

t

1

CR

θ

)

≦

R

t

≦

Δ

⁢

⁢

T

0

R

θ

⁢

I

0

2

,

(

1

)

wherein T 1 is a melting point in degrees Kelvin of the fusing unit,

wherein T C is a temperature in degrees Kelvin of an environment in which the power storage device is used,

wherein I 1 is a short-circuit current in Amperes flowing at a time of short-circuit of at least one battery block of the plurality of battery blocks,

wherein C is a thermal capacity in Joules per degree Kelvin of the fusing unit,

wherein t 1 is the fusing time in seconds of the fusing unit in case where the short-circuit current has flown,

wherein t 1 =1 second,

wherein R θ is a thermal resistance in degrees Kelvin per Watts of the fusing unit and R θ =(1/λ)×(L/S),

wherein A is a thermal conductivity in Watts per meters of a heat transfer unit in the connection terminal,

wherein L is a length in meters of the heat transfer unit,

wherein S is a cross-sectional area in square meters of the heat transfer unit,

wherein the electrical resistance R t of the fusing unit is in ohms and the electrical resistance R t =(1/σ)×(L′/S′),

wherein σ is an electric conductivity [1/Ω·m] of the fusing unit,

wherein L′ is a length in meters of the fusing unit,

wherein S′ is a cross-sectional area in square meters of the fusing unit,

wherein I 0 is the maximum current, in Amperes, of the power storage device, and

wherein Δ T0 is an upper limit of temperature rise of the connection terminal in degrees Kelvin.

10. A power storage system, comprising:

a power generation device configured to generate power from renewable energy; and

a power storage device, comprising:

a plurality of battery block groups, wherein each of the plurality of battery block groups comprising a plurality of battery blocks, wherein each of the plurality of battery blocks comprising a plurality of battery cells, wherein the plurality of battery cells in each of the plurality of battery blocks are arranged in a first direction, wherein the plurality of battery blocks in each of the plurality of battery block groups are arranged in a second direction orthogonal to the first direction,

wherein the plurality of battery cells in each of the plurality of battery blocks is in a corresponding straight line, and

wherein the plurality of battery cells in each of the plurality of battery blocks are interconnected in parallel; and

a connection terminal electrically connected to terminal faces of the plurality of battery cells of a first battery block of the plurality of battery blocks,

wherein adjacent battery blocks of the plurality of battery blocks are in a straw bag arrangement,

wherein a first cut out is formed from an edge of the connection terminal in a third direction perpendicular to a longitudinal direction of the connection terminal,

wherein at least one second cut out is connected to the first cut out and is extended along the longitudinal direction of the connection terminal,

wherein the longitudinal direction of the connection terminal is substantially same as the first direction,

wherein a position of the first cut out corresponds to a boundary between adjacent battery cells of the plurality of battery cells connected in parallel, and

wherein the power storage device is charged by the power generation device.

11. A power storage system, comprising:

a power storage device, comprising:

a plurality of battery block groups, wherein each of the plurality of battery block groups comprising a plurality of battery blocks, wherein each of the plurality of battery blocks comprising a plurality of battery cells, wherein the plurality of battery cells in each of the plurality of battery blocks are arranged in a first direction, wherein the plurality of battery blocks in each of the plurality of battery block groups are arranged in a second direction orthogonal to the first direction,

wherein the plurality of battery cells in each of the plurality of battery blocks is in a corresponding straight line, and

wherein the plurality of battery cells in each of the plurality of battery blocks are interconnected in parallel; and

a connection terminal electrically connected to terminal faces of the plurality of battery cells of a first battery block of the plurality of battery blocks,

wherein adjacent battery blocks of the plurality of battery blocks are in a straw bag arrangement,

wherein a first cut out is formed from an edge of the connection terminal in a third direction perpendicular to a longitudinal direction of the connection terminal,

wherein at least one second cut out is connected to the first cut out and is extended along the longitudinal direction of the connection terminal,

wherein the longitudinal direction of the connection terminal is substantially same as the first direction, and

wherein a position of the first cut out corresponds to a boundary between adjacent battery cells of the plurality of battery cells connected in parallel; and

at least one electronic device connected to the power storage device,

wherein the power storage device is configured to supply power to the at least one electronic device.

12. A power storage system, comprising:

an electric power system;

a power generation device;

a control device; and

a power storage device, comprising:

a plurality of battery block groups, wherein each of the plurality of battery block groups comprising a plurality of battery blocks, wherein each of the plurality of battery blocks comprising a plurality of battery cells, wherein the plurality of battery cells in each of the plurality of battery blocks are arranged in a first direction, wherein the plurality of battery blocks in each of the plurality of battery block groups are arranged in a second direction orthogonal to the first direction,

wherein the plurality of battery cells in each of the plurality of battery blocks is in a corresponding straight line, and

wherein the plurality of battery cells in each of the plurality of battery blocks are interconnected in parallel; and

a connection terminal electrically connected to terminal faces of the plurality of battery cells of a first battery block of the plurality of battery blocks,

wherein adjacent battery blocks of the plurality of battery blocks are in a straw bag arrangement,

wherein a first cut out is formed from an edge of the connection terminal in a third direction perpendicular to a longitudinal direction of the connection terminal,

wherein at least one second cut out is connected to the first cut out and is extended along the longitudinal direction of the connection terminal,

wherein the longitudinal direction of the connection terminal is substantially same as the first direction, and

wherein a position of the first cut out corresponds to a boundary between adjacent battery cells of the plurality of battery cells connected in parallel,

wherein a power network system is configured to supply power to the power storage device from the electric power system,

wherein the power generation device is configured to supply power to the power storage device and a power consumption device, and

wherein the control device is configured to control an amount of power supplied to the power storage device from the electric power system and the power generation device.

13. A power storage system, comprising:

an engine;

an electric generator;

a power driving force conversion device;

a driving wheel; and

a power storage device, comprising:

a plurality of battery block groups, wherein each of the plurality of battery block groups comprising a plurality of battery blocks, wherein each of the plurality of battery blocks comprising a plurality of battery cells, wherein the plurality of battery cells in each of the plurality of battery blocks are arranged in a first direction, wherein the plurality of battery blocks in each of the plurality of battery block groups are arranged in a second direction orthogonal to the first direction,

wherein the plurality of battery cells in each of the plurality of battery blocks is in a corresponding straight line, and

wherein the plurality of battery cells in each of the plurality of battery blocks are interconnected in parallel; and

a connection terminal electrically connected to terminal faces of the plurality of battery cells of a first battery block of the plurality of battery blocks,

wherein adjacent battery blocks of the plurality of battery blocks are in a straw bag arrangement,

wherein a first cut out is formed from an edge of the connection terminal in a third direction perpendicular to a longitudinal direction of the connection terminal,

wherein at least one second cut out is connected to the first cut out and is extended along the longitudinal direction of the connection terminal,

wherein the longitudinal direction of the connection terminal is substantially same as the first direction, and

wherein a position of the first cut out corresponds to a boundary between adjacent battery cells of the plurality of battery cells connected in parallel,

wherein the power driving force conversion device is activated by power from the power storage device,

wherein a rotating force of the power driving force conversion device is transmitted to the driving wheel, and

wherein a rotating force of the engine is transmitted to the electric generator.

14. An electronic device supplied with power from a power storage device, the power storage device comprising:

a plurality of battery block groups, wherein each of the plurality of battery block groups comprising a plurality of battery blocks, wherein each of the plurality of battery blocks comprising a plurality of battery cells, wherein the plurality of battery cells in each of the plurality of battery blocks are arranged in a first direction, wherein the plurality of battery blocks in each of the plurality of battery block groups are arranged in a second direction orthogonal to the first direction,

wherein the plurality of battery cells in each of the plurality of battery blocks is in a corresponding straight line, and

wherein the plurality of battery cells in each of the plurality of battery blocks are interconnected in parallel; and

a connection terminal electrically connected to terminal faces of the plurality of battery cells of a first battery block of the plurality of battery blocks,

wherein adjacent battery blocks of the plurality of battery blocks are in a straw bag arrangement,

wherein a first cut out is formed from an edge of the connection terminal in a third direction perpendicular to a longitudinal direction of the connection terminal;

wherein at least one second cut out is connected to the first cut out and is extended along the longitudinal direction of the connection terminal,

wherein the longitudinal direction of the connection terminal is substantially same as the first direction, and

wherein a position of the first cut out corresponds to a boundary between adjacent battery cells of the plurality of battery cells connected in parallel.

15. An electric vehicle, comprising:

a conversion device which is supplied with power from a power storage device, wherein the power storage device comprising:

a plurality of battery block groups, wherein each of the plurality of battery block groups comprising a plurality of battery blocks, wherein each of the plurality of battery blocks comprising a plurality of battery cells, wherein the plurality of battery cells in each of the plurality of battery blocks are arranged in a first direction, wherein the plurality of battery blocks in each of the plurality of battery block groups are arranged in a second direction orthogonal to the first direction,

wherein the plurality of battery cells in each of the plurality of battery blocks is in a corresponding straight line, and

wherein the plurality of battery cells in each of the plurality of battery blocks are interconnected in parallel; and

a connection terminal electrically connected to terminal faces of the plurality of battery cells of a first battery block of the plurality of battery blocks,

wherein adjacent battery blocks of the plurality of battery blocks are in a straw bag arrangement,

wherein a first cut out is formed from an edge of the connection terminal in a third direction perpendicular to a longitudinal direction of the connection terminal;

wherein at least one second cut out is connected to the first cut out and is extended along the longitudinal direction of the connection terminal,

wherein the longitudinal direction of the connection terminal is substantially same as the first direction,

wherein a position of the first cut out corresponds to a boundary between adjacent battery cells of the plurality of battery cells connected in parallel, and

wherein the conversion device is configured to convert the power to a driving force of the electric vehicle; and

a control device configured to process information associated with vehicle control on a basis of information associated with the power storage device.

16. An apparatus, comprising:

a connection terminal configured to:

electrically connect a plurality of battery cells of a first battery block of a plurality of battery blocks,

wherein each battery block of the plurality of battery blocks includes the corresponding plurality of battery cells connected in parallel,

wherein adjacent battery blocks of the plurality of battery blocks are in a straw bag arrangement,

wherein the connection terminal comprises a first cut out and at least one second cut out,

wherein the first cut out is formed from an edge of the connection terminal,

wherein the first cut out is in a direction perpendicular to a longitudinal direction of the connection terminal,

wherein the at least one second cut out is connected to the first cut out and is extended along the longitudinal direction of the connection terminal, and

wherein a position of the first cut out corresponds to a boundary between adjacent battery cells of the plurality of battery cells connected in parallel.