# US 11,077,744 B2 · Battery pack

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- Number: US 11,077,744 B2
- Document ID: US11077744B2
- Status: Granted
- Kind: B2
- Application number: 15/841,725
- Filed: 2017-12-14
- Published: 2018-06-14
- Granted: 2021-08-03
- Earliest claimed: 2016-12-14
- Assignees: Denso Corporation
- Applicants: Denso Corporation
- Inventors: Yoshimitsu Inoue
- Web page: https://patentgrep.com/patent/US11077744B2

## CPC

- B60K 1/04: of the electric storage means for propulsion
- B60L 50/64: Constructional details of batteries specially adapted for electric vehicles
- B60L 58/26: by cooling
- H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)}
- H01M 10/44: Methods for charging or discharging (circuits for charging H02J7/00)
- H01M 10/613: Cooling or keeping cold
- H01M 10/625: Vehicles
- H01M 10/6551: Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
- H01M 10/6554: Rods or plates
- H01M 50/262: with fastening means, e.g. locks
- H02J 7/00: Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- B60K 1/00: Arrangement or mounting of electrical propulsion units (B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00)
- B60K 11/06: with air cooling
- B60K 2001/003: {with means for cooling the electrical propulsion units}
- B60K 2001/0416: {Arrangement in the rear part of the vehicle}
- B60K 2001/0422: {Arrangement under the front seats}
- B60K 2001/0427: {Arrangement between the seats}
- B60K 2001/0433: {Arrangement under the rear seats}
- B60L 2240/545: Temperature
- B60Y 2400/61: Arrangements of controllers for electric machines, e.g. inverters
- G01R 31/396: Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
- Y02E 60/10: Energy storage using batteries
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- 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
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A battery pack has a plurality of unit cells, a casing for accommodating the plurality of unit cells, and a base which is a part of the casing and has a heat dissipation wall and a first side wall disposed so as to be capable of transferring heat to the heat dissipation wall. The battery pack includes a stay disposed on the first side wall in the base and fixed to a vehicle-side member, and a switching device disposed so that released heat can be transferred to the heat dissipation wall or the first side wall. The switching device includes a first switching device and a third switching device having a smaller heating value than the first switching device has. The first switching device is disposed at a position closer to the stay than the third switching device is in planar view.

## Claims

### Claim 1

A battery pack comprising:
a secondary battery;
a casing that accommodates the secondary battery;
a base which is a part of the casing and has a heat dissipation wall and a side wall disposed so as to transfer heat to the heat dissipation wall;
two fixing portions disposed on the side wall in the base and configured to be fixed to a vehicle-side member, the fixing portions being configured to mount the battery pack to a vehicle having the vehicle-side member;
two first electrical components disposed so that released heat can be transferred to the heat dissipation wall or the side wall;
two second electrical components disposed so that released heat can be transferred to the heat dissipation wall or the side wall, the second electrical components each having a smaller heat generation density than both of the first electrical components, each of the first electrical components being disposed closer than both of the second electrical components to one of the fixing portions in planar view; and
two dissipation paths through which the heat transferred from each first electrical component to the heat dissipating wall dissipates to the vehicle-side member through a respective nearest fixing portion,
wherein neither second electrical component is disposed in one of the heat dissipation paths.

### Claim 2 (depends on 1)

The battery pack according to claim 1, wherein the first electrical components and the second electrical components are switching devices that control current.

### Claim 3 (depends on 2)

The battery pack according to claim 2, wherein
the first electrical components each include:
a first switching device for controlling current between a rotating machine, which performs a power generating function and a power output function of the vehicle, and an external battery; and
a second switching device for controlling current between the rotating machine and the secondary battery, and
the second electrical components each include:
a third switching device for controlling current between electric load of the vehicle and the external battery; and
a fourth switching device for controlling current between the electric load and the secondary battery.

### Claim 4 (depends on 1)

The battery pack according to claim 1, wherein the first and second electrical components are disposed between the two fixing portions in a direction.

### Claim 5 (depends on 4)

The battery pack according to claim 4, wherein the second electrical components are disposed between the first electrical components in the direction.