公开(公告)号：EP2413467A1

公开(公告)日：2012-02-01

申请号：EP11166969.3

申请日：2011-05-20

Applicant: BYD Company Circuit

Inventor： Feng, Wei ,  Xia, Wenjin ,  Xu, Wenhui ,  Han, Yaochuan ,  Yang, Qinyao ,  Ma, Shibin

IPC: H02J7/00 ,  H01H9/54 ,  H01M10/50 ,  H02M5/00

CPC classification number: H01L23/345 ,  H01L2924/0002 ,  H01M10/615 ,  H01M10/625 ,  H01M10/651 ,  H01M10/657 ,  H01M10/6571 ,  H01M10/6572 ,  H02J7/0014 ,  H02J7/0054 ,  H02J7/0075 ,  H02J7/0091 ,  H02J7/0093 ,  H02M3/158 ,  Y02E60/12 ,  Y02T10/7055 ,  H01L2924/00

Abstract: The present invention provides a battery heating circuit, comprising a switch unit (1), a switching control module (100), a damping element R1, an energy storage circuit, and a freewheeling circuit (20), wherein, the energy storage circuit is connected with the battery, and comprises a current storage element L1 and a charge storage element C1; the damping element R1, switch unit (1), current storage element L1, and charge storage element C1 are connected in series; the switching control module (100) is connected with the switch unit (1), and is configured to control ON/OFF of the switch unit (1), so that the energy can flow to and fro between the battery and the energy storage circuit when the switch unit (1) switches on, and amplitude of the current flowing from the energy storage circuit to the battery can be controlled; the freewheeling circuit (20) is configured to sustain the current flowing to the battery when there is current flowing from the energy storage circuit to the battery and after the switch unit (1) switches off. The battery heating circuit provided in the present invention can avoid the safety problem caused by overcurrent in the heating circuit, so as to protect the battery efficiently.

Abstract translation: 本发明提供一种电池加热电路，包括开关单元（1），开关控制模块（100），阻尼元件R1，储能电路和续流电路（20），其中，储能电路为 与电池连接，并包括电流存储元件L1和电荷存储元件C1; 阻尼元件R1，开关单元（1），电流存储元件L1和电荷存储元件C1串联连接; 所述开关控制模块（100）与所述开关单元（1）连接，用于控制所述开关单元（1）的导通/关断，使得所述能量可以在所述电池与所述储能电路 当开关单元（1）接通时，并且可以控制从储能电路流向电池的电流的幅度; 续流电路（20）被配置为在电流从电能存储电路流向电池时并且在开关单元（1）关断之后维持流向电池的电流。 本发明提供的电池加热电路可以避免加热电路中过电流引起的安全问题，从而有效保护电池。