# US 12,113,227 B2 · Cell, power battery pack, and electric vehicle

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- Number: US 12,113,227 B2
- Document ID: US12113227B2
- Status: Granted
- Kind: B2
- Application number: 17/422,084
- Filed: 2019-06-21
- Published: 2022-03-31
- Granted: 2024-10-08
- Earliest claimed: 2019-01-09
- Assignees: BYD Company Limited
- Applicants: BYD Company Limited
- Inventors: Long He; Huajun Sun; Wenfeng Jiang; Zhipei Lu; Weixin Zheng; Jianglong Tang; Yan Zhu; Xinyue Wang; Kefeng He
- Web page: https://patentgrep.com/patent/US12113227B2

## CPC

- H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence)
- B60K 1/04: of the electric storage means for propulsion
- B60L 50/64: Constructional details of batteries specially adapted for electric vehicles
- B60L 50/66: {Arrangements of batteries}
- H01M 10/052: Li-accumulators
- H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)}
- H01M 10/613: Cooling or keeping cold
- H01M 10/625: Vehicles
- H01M 10/647: Prismatic or flat cells, e.g. pouch cells
- H01M 10/6551: Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
- H01M 10/6554: Rods or plates
- H01M 10/6556: Solid parts with flow channel passages or pipes for heat exchange (closed pipes H01M10/6552)
- H01M 10/6567: Liquids
- H01M 10/6568: characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
- H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence)
- H01M 50/119: Metals
- H01M 50/131: characterised by physical properties, e.g. gas permeability, size or heat resistance
- H01M 50/244: Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
- 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)
- H01M 50/271: Lids or covers for the racks or secondary casings
- H01M 50/317: Re-sealable arrangements
- H01M 50/342: Non-re-sealable arrangements
- H01M 50/3425: {in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member}
- H01M 50/35: Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
- H01M 50/367: Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems
- H01M 50/383: Flame arresting or ignition-preventing means
- H01M 50/531: Electrode connections inside a battery casing
- H01M 50/543: Terminals
- B60K 2001/0405: {characterised by their position}
- B60K 2001/0438: {Arrangement under the floor}
- B60L 58/26: by cooling
- H01M 10/6569: Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation (heat pipes H01M10/6552)
- H01M 2010/4271: {Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing}
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A cell, a power battery pack, and an electric vehicle are provided. The cell includes a cell body, and the cell body has a length L, a width H and a thickness D. The length L of the cell body is greater than the width H, the width H of the cell body is greater than the thickness D, the length L of the cell body is greater than 600 mm, and the length L and the width H of the cell body satisfy L/H=4-21.

## Claims

### Claim 1

A power battery pack, comprising:
a housing; and
a plurality of cells provided in the housing, wherein each of the cells comprises:
a cell body, having a length L, a width H and a thickness D, the length L of the cell body being greater than the width H, and the width H of the cell body being greater than the thickness D, wherein the length L of the cell body is greater than 600 mm; the cell body has a volume V of greater than or equal to 953,750 mm3; and the length L and the width H of the cell body satisfy L/H=4-21, and the cell is a prismatic cell with an aluminum casing,
wherein the cells have a total volume V1, the power battery pack has a volume V2, and V1/V2 is equal to or greater than 55%.

### Claim 2 (depends on 1)

The power battery pack according to claim 1, wherein the length L and the width H of the cell body satisfy L/H=9-13.

### Claim 3 (depends on 1)

The power battery pack according to claim 1, wherein the length L and the thickness D of the cell body satisfy L/D=23-208.

### Claim 4 (depends on 1)

The power battery pack according to claim 1, wherein the length L of the cell body and the volume V of the cell body satisfy L/V=0.0005 mm−2-0.002 mm−2.

### Claim 5 (depends on 1)

The power battery pack according to claim 1, wherein the width H of the cell body and the volume V of the cell body satisfy H/V=0.0001 mm−2-0.00015 mm−2.

### Claim 6 (depends on 1)

The power battery pack according to claim 1, wherein the thickness D of the cell body and the volume V of the cell body satisfy D/V=0.0000065 mm−2-0.00002 mm−2.

### Claim 7 (depends on 1)

The power battery pack according to claim 1, wherein the length L of the cell body and a surface area S of the cell body satisfy L/S=0.002 mm−1-0.005 mm−1.

### Claim 8 (depends on 1)

The power battery pack according to claim 1, wherein a surface area S of the cell body and the volume V of the cell body satisfy S/V=0.1 mm−1-0.35 mm−1.

### Claim 9 (depends on 1)

The power battery pack according to claim 1, wherein a surface area S of the cell body and an energy E of the cell body satisfy S/E≤1000 mm2·Wh−1.

### Claim 10 (depends on 1)

The power battery pack according to claim 1, wherein the length L of the cell body and an energy E of the cell body satisfy L/E=0.8 mm·Wh−1-2.45 mm·Wh−1.

### Claim 11 (depends on 1)

The power battery pack according to claim 1, wherein the length L of the cell body and an energy E of the cell body satisfy L/E=1.65 mm·Wh−1-2.45 mm·Wh−1.

### Claim 12 (depends on 1)

The power battery pack according to claim 1, wherein the length L of the cell body is 600-2500 mm.

### Claim 13 (depends on 12)

The power battery pack according to claim 12, wherein the length L of the cell body is 600-1500 mm.

### Claim 14 (depends on 1)

The power battery pack according to claim 1, wherein each of the cells is oriented within a housing such that a length direction and a thickness direction of the cell body extend along horizontal directions, and a width direction of the cell body extends along a vertical direction.

### Claim 15 (depends on 1)

The power battery pack according to claim 1, wherein each of the cells further comprises:
a first electrode tab, provided at one end of the cell body along a length direction of the cell body; and
a second electrode tab, provided at the other end of the cell body along the length direction.

### Claim 16 (depends on 1)

The power battery pack according to claim 1, wherein each of the cells further comprises: at least one anti-explosion valve, provided on at least one end of the cell body in a length direction of the cell body.

### Claim 17 (depends on 1)

The power battery pack according to claim 1, wherein two ends of the cell body in a length direction of the cell body are respectively provided with an anti-explosion valve.