Battery, battery can, battery pack, electronic device, electric vehicle, electricity storage device, and electric power system

• US 10,790,490 B2
• Filed: 08/15/2016
• Issued: 09/29/2020
• Est. Priority Date: 09/09/2015
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Sodeyama, Kunio, Umekawa, Masafumi, Noguchi, Kazunori, Mori, Takao, Suzuki, Kazuhiko
• Primary Examiner(s): Haske, Wojciech
• Application Number:
  US15/754,935
• Publication Number:
  US 20200243822A1
• Time in Patent Office: 1,506 Days
• Field of Search: None
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 50/64 Constructional details of batteries specially adapted for electric vehicles
• CPC Class Codes: B60L 58/10 for monitoring or controlling batteries
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 4/525 of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
• CPC Class Codes: H01M 50/107 having curved cross-section, e.g. round or elliptic H01M50/103, H01M50/109, H01M50/11 take precedence
• CPC Class Codes: H01M 50/213 adapted for cells having curved cross-section, e.g. round or elliptic H01M50/209, H01M50/216 take precedence
• CPC Class Codes: H01M 50/249 specially adapted for aircraft or vehicles, e.g. cars or trains constructional details of batteries specially adapted for electric vehicles B60L50/64
• CPC Class Codes: H01M 50/3425 in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
• CPC Class Codes: H02J 13/00002 characterised by monitoring
• CPC Class Codes: H02J 3/32 using batteries with converting means
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02J 7/00712 the cycle being controlled or terminated in response to electric parameters
• CPC Class Codes: H02J 7/35 with light sensitive cells
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y04S 10/126 the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]
• CPC Class Codes: Y04S 10/14 Energy storage units

Abstract

A battery includes: an electrode body; and a battery can housing the electrode body and having a bottom portion. The bottom portion has an arc-shaped groove. An opening angle of the groove with respect to a center of the bottom portion is 0.5 degrees or more and 56 degrees or less. A ratio of an inner diameter of the groove with respect to an outer diameter of the bottom portion is 44% or more and 77% or less.

Claims

1. A battery comprising:

an electrode body; and

a battery can housing the electrode body and having a bottom portion, wherein

the bottom portion has an arc-shaped groove,

an opening angle of the groove with respect to a center of the arc is 0.5 degrees or more and 56 degrees or less, and

a ratio of an inner diameter of the groove with respect to an outer diameter of the bottom portion is 44% or more and 77% or less.

2. The battery according to claim 1, wherein the groove is disposed inside the battery can.

3. The battery according to claim 1, wherein a volume energy density of the battery is 430 Wh/L or more.

4. The battery according to claim 1, wherein the bottom portion at a bottom of the groove has a thickness of 0.020 mm or more and 0.150 mm or less.

5. The battery according to claim 1, wherein the groove has a width of 0.10 mm or more and 1.00 mm or less.

6. The battery according to claim 1, further comprising a safety valve for releasing gas when the gas is generated in the battery can.

7. The battery according to claim 6, wherein a gas release pressure of the groove is higher than a gas release pressure of the safety valve.

8. The battery according to claim 1, wherein a center of the arc coincides with a center of the bottom portion.

9. The battery according to claim 1, wherein a cross-sectional shape of the groove is a substantially trapezoidal shape, a substantially rectangular shape, a substantially triangular shape, a substantially partially circular shape, a substantially partially elliptical shape, or an indefinite shape.

10. The battery according to claim 1, wherein

the electrode body includes a positive electrode and a negative electrode, and

an open circuit voltage in a fully charged state per pair of the positive electrode and the negative electrode is 4.4 V or more and 6.00 V or less.

11. The battery according to claim 1, wherein the electrode body includes a positive electrode containing a positive electrode active material having an average composition represented by the following formula (1),

Li_vNi_wM′

_xM″

_yO_z 

 

(1)

(where, 0<

v<

2, w+x+y≤

1, 0.8≤

w≤

1, 0≤

x≤

0.2, 0≤

y≤

0.2, and 0<

z<

3 are satisfied, and each of M′ and

M″

represents at least one selected from cobalt (Co), iron (Fe), manganese (Mn), copper (Cu), zinc (Zn), aluminum (Al), chromium (Cr), vanadium (V), titanium (Ti), magnesium (Mg), and zirconium (Zr)).

12. A battery pack comprising:

the battery according to claim 1; and

a control unit for controlling the battery.

13. An electronic device comprising the battery according to claim 1, wherein

the electronic device receives electric power from the battery.

14. An electric vehicle comprising:

the battery according to claim 1;

a converter for converting electric power supplied from the battery into a driving force of the vehicle; and

a control device for performing information processing regarding vehicle control on the basis of information regarding the battery.

15. An electricity storage device comprising the battery according to claim 1, wherein

the electricity storage device supplies electric power to an electronic device connected to the battery.

16. The electricity storage device according to claim 15, further comprising an electric power information control device for transmitting a signal to or receiving a signal from another device via a network, wherein

the electricity storage device performs charge-discharge control of the battery on the basis of information received by the electric power information control device.

17. An electric power system comprising the battery according to claim 1, wherein

the electric power system receives electric power from the battery.

18. The electric power system according to claim 17, wherein electric power is supplied to the battery from a power generating device or an electric power network.

19. A battery can comprising a bottom portion with an arc-shaped groove, wherein

an opening angle of the groove with respect to a center of the arc is 0.5 degrees or more and 56 degrees or less, and

a ratio of an inner diameter of the groove with respect to an outer diameter of the bottom portion is 44% or more and 77% or less.