US 12,654,592 B2Granted

Battery self-heating system and vehicle

AssigneeBYD Company Limited

InventorsLei Yan, Wen Gao, Junwei Zhang, Gan Song

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Abstract

A battery self-heating system includes: a power battery pack, a first heating device, a second heating device and a controller. The power battery pack includes a first battery group and a second battery group connected in series; the first heating device includes a first heating sub-device and a second heating sub-device; the second heating device includes a third heating sub-device and a fourth heating sub-device; and the controller is configured to: control the first heating device and the first battery group to be alternately charged and discharged, control the second heating device and the second battery group to be alternately charged and discharged, and control, when a first one of the first battery group and the second battery group is in a discharged state, a second one of the first battery group and the second battery group to be in a charged state.

Claims18

Dependent claims

A battery self-heating system, applicable to a vehicle, the system comprising:

a power battery pack comprising a first battery pack and a second battery pack connected to each other;
a first heating device comprising a first heating sub-device and a second heating sub-device, a first connection end and a second connection end of the first heating sub-device respectively connected to a positive electrode and a negative electrode of the first battery pack, a first connection end and a second connection end of the second heating sub-device respectively connected to the positive electrode and the negative electrode of the first battery pack, and a third connection end of the first heating sub-device connected to a third connection end of the second heating sub-device;
a second heating device comprising a third heating sub-device and a fourth heating sub-device, a first connection end and a second connection end of the third heating sub-device respectively connected to a positive electrode and a negative electrode of the second battery pack, a first connection end and a second connection end of the fourth heating sub-device respectively connected to the positive electrode and the negative electrode of the second battery pack, and a third connection end of the third heating sub-device connected to a third connection end of the fourth heating sub-device;
and
a controller, connected to the first heating device and the second heating device, and configured to:
control the first heating device and the first battery pack to be alternately charged and discharged, control the second heating device and the second battery pack to be alternately charged and discharged, and control a first one of the first battery pack and the second battery pack to be in a charging state when a second one of the first battery pack and the second battery pack is in a discharging state.

3 more elements

A vehicle, comprising a battery self-heating system, the system comprising:

a power battery pack comprising a first battery pack and a second battery pack connected to each other;
a first heating device comprising a first heating sub-device and a second heating sub-device, a first connection end and a second connection end of the first heating sub-device respectively connected to a positive electrode and a negative electrode of the first battery pack, a first connection end and a second connection end of the second heating sub-device respectively connected to the positive electrode and the negative electrode of the first battery pack, and a third connection end of the first heating sub-device connected to a third connection end of the second heating sub-device;
a second heating device comprising a third heating sub-device and a fourth heating sub-device, a first connection end and a second connection end of the third heating sub-device respectively connected to a positive electrode and a negative electrode of the second battery pack, a first connection end and a second connection end of the fourth heating sub-device respectively connected to the positive electrode and the negative electrode of the second battery pack, and a third connection end of the third heating sub-device connected to a third connection end of the fourth heating sub-device;
and
a controller, connected to the first heating device and the second heating device, and configured to:
control the first heating device and the first battery pack to be alternately charged and discharged, control the second heating device and the second battery pack to be alternately charged and discharged, and control a first one of the first battery pack and the second battery pack to be in a charging state when a second one of the first battery pack and the second battery pack is in a discharging state.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/062,972Filed 25 Feb 2025 · continuation
Priority: CN 202211071491.X31 Aug 2022
Published: US 2025/0196719 A119 Jun 2025
Granted: 16 Jun 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification40 codes

B60L 58/27
For controlling the temperature of batteries: by heating
B60L 1/02
Supplying electric power to auxiliary equipment of vehicles: to electric heating circuits
B60L 15/007
Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles: physical arrangements or structures of…
B60L 50/60
Using propulsion power supplied by batteries or fuel cells: using power supplied by batteries