# US 2020/0403285 A1 · Power storage unit and solar power generation unit

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2020/0403285 A1
- Document ID: US20200403285A1
- Status: Published application
- Kind: A1
- Application number: 17/008,699
- Filed: 2020-09-01
- Published: 2020-12-24
- Earliest claimed: 2012-06-27
- Assignees: Semiconductor Energy Laboratory Co., Ltd.
- Applicants: Semiconductor Energy Laboratory Co., Ltd.
- Inventors: Minoru TAKAHASHI; Shunpei YAMAZAKI; Masaaki HIROKI; Kei TAKAHASHI; Junpei MOMO
- Web page: https://patentgrep.com/patent/US20200403285A1

## CPC

- H01M 10/443: {in response to temperature}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/465: {with solar battery as charging system}
- H01M 10/486: {for measuring temperature}
- H01M 10/615: Heating or keeping warm
- H01M 10/63: Control systems (charging or discharging in response to temperature H01M10/44 {, H01M10/443}; measurement of temperature H01M10/48 {, H01M10/486})
- H01M 10/637: characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching (means for preventing undesired use or discharge H01M50/572)
- H01M 10/6571: Resistive heaters (arrangements for heating the battery by its resistance to the internal current H01M10/637)
- H02J 7/35: with light sensitive cells
- H02S 10/20: Systems characterised by their energy storage means (H02S40/38 takes precedence)
- H01M 10/052: Li-accumulators
- Y02E 10/56: Power conversion systems, e.g. maximum power point trackers
- Y02E 60/10: Energy storage using batteries
- Y02E 70/30: Systems combining energy storage with energy generation of non-fossil origin
- 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
- H02S: GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES (obtaining electrical energy from radioactive sources G21H1/12; light sensitive inorganic semiconductor devices H10F; light sensitive organic semiconductor devices H10K30/00; thermoelectric devices H10N10/00; pyroelectric devices H10N15/00)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Disclosed is a power storage unit which can safely operate over a wide temperature range. The power storage unit includes: a power storage device; a heater for heating the power storage device; a temperature sensor for sensing the temperature of the power storage device; and a control circuit configured to inhibit charge of the power storage device when its temperature is lower than a first temperature or higher than a second temperature. The first temperature is exemplified by a temperature which allows the formation of a dendrite over a negative electrode of the power storage device, whereas the second temperature is exemplified by a temperature which causes decomposition of a passivating film formed over a surface of a negative electrode active material.

## Claims

### Claim 1

(canceled)

### Claim 2

A power storage unit comprising:
a power storage device;
a heater;
a diode;
a first transistor, the first transistor being p-channel transistor; and
a second transistor, the second transistor being n-channel transistor,
wherein a positive electrode of the power storage device is electrically connected to an anode of the diode,
wherein the positive electrode of the power storage device is electrically connected to one of a source and a drain of the first transistor,
wherein a negative electrode of the power storage device is electrically connected to one of a source and a drain of the second transistor,
wherein one terminal of the heater is electrically connected to the one of the source and the drain of the second transistor,
wherein the other terminal of the heater is electrically connected to the other of the source and the drain of the first transistor,
wherein a gate of the first transistor is electrically connected to a gate of the second transistor,
wherein the first transistor is off and the second transistor is on when a temperature of the power storage device is lower than a first temperature, and
wherein the first transistor is on and the second transistor is off when the temperature of the power storage device is higher than or equal to the first temperature.

### Claim 3

A power storage unit comprising:
a power storage device;
a heater;
a diode;
a first transistor, the first transistor being p-channel transistor; and
a second transistor, the second transistor being n-channel transistor,
wherein a positive electrode of the power storage device is electrically connected to an anode of the diode,
wherein the positive electrode of the power storage device is electrically connected to one of a source and a drain of the first transistor,
wherein a negative electrode of the power storage device is electrically connected to one of a source and a drain of the second transistor,
wherein one terminal of the heater is electrically connected to the one of the source and the drain of the second transistor,
wherein the other terminal of the heater is electrically connected to the other of the source and the drain of the first transistor,
wherein a gate of the first transistor is electrically connected to a first terminal,
wherein a gate of the second transistor is electrically connected to a second terminal,
wherein the first transistor is off and the second transistor is on when a temperature of the power storage device is lower than a first temperature, and
wherein the first transistor is on and the second transistor is off when the temperature of the power storage device is higher than or equal to the first temperature.

### Claim 4

A power storage unit comprising:
a power storage device;
a heater;
a diode;
a first transistor, the first transistor being p-channel transistor;
a second transistor, the second transistor being n-channel transistor; and
a control circuit,
wherein a positive electrode of the power storage device is electrically connected to an anode of the diode,
wherein the positive electrode of the power storage device is electrically connected to one of a source and a drain of the first transistor,
wherein a negative electrode of the power storage device is electrically connected to one of a source and a drain of the second transistor,
wherein one terminal of the heater is electrically connected to the one of the source and the drain of the second transistor,
wherein the other terminal of the heater is electrically connected to the other of the source and the drain of the first transistor,
wherein a gate of the first transistor is electrically connected to a gate of the second transistor,
wherein the gate of the first transistor is electrically connected to the control circuit,
wherein the control circuit is configured to turn off the first transistor and to turn on the second transistor when a temperature of the power storage device is lower than a first temperature,
wherein the control circuit is configured to turn on the first transistor and to turn off the second transistor.

### Claim 5

A power storage unit comprising:
a power storage device;
a heater;
a diode;
a first transistor, the first transistor being p-channel transistor;
a second transistor, the second transistor being n-channel transistor; and
a control circuit,
wherein a positive electrode of the power storage device is electrically connected to an anode of the diode,
wherein the positive electrode of the power storage device is electrically connected to one of a source and a drain of the first transistor,
wherein a negative electrode of the power storage device is electrically connected to one of a source and a drain of the second transistor,
wherein one terminal of the heater is electrically connected to the one of the source and the drain of the second transistor,
wherein the other terminal of the heater is electrically connected to the other of the source and the drain of the first transistor,
wherein a gate of the first transistor is electrically connected to a first terminal of the control circuit,
wherein a gate of the second transistor is electrically connected to a second terminal of the control circuit,
wherein the control circuit is configured to turn off the first transistor and to turn on the second transistor when a temperature of the power storage device is lower than a first temperature,
wherein the control circuit is configured to turn on the first transistor and to turn off the second transistor.