Battery pack and power supply system

Patent metadata

Field	Value
Publication number	US-11437835-B2
Application number	US-201916419129-A
Country	US
Kind code	B2
Filing date	May 22, 2019
Priority date	Dec 14, 2016
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

A battery pack includes a power supply conduction member to be electrically connected to a power supply, a power supply terminal connected to the power supply conduction member, a load conduction member to be connected to an electrical load, a load terminal connected to the load conduction member, a wiring pattern connecting the power supply terminal and the load terminal, and a switch provided in the wiring pattern. The power supply conduction member includes a plurality of power supply connection terminals that are mechanically and electrically connected to a plurality of power supply terminals, respectively, and the load conduction member includes a plurality of load connection terminals that are mechanically and electrically connected to a plurality of load terminals, respectively.

First claim

What is claimed is:

1. A battery pack comprising:
a circuit board;
a power supply conduction member that (1) is separate from the circuit board and (2) includes a power supply conduction member end that is configured to be electrically connected to a power supply, a first power supply connection terminal extending from the power supply conduction member end and a second power supply connection terminal extending from the power supply conduction member end separately from the first power supply connection terminal;
a first power supply terminal and a second power supply terminal that are formed on the circuit board, the first power supply terminal being mechanically and electrically connected to the first power supply connection terminal of the power supply conduction member, the second power supply terminal being mechanically and electrically connected to the second power supply connection terminal of the power supply conduction member;
a load conduction member that (1) is separate from the circuit board and (2) includes a load conduction member end that is configured to be electrically connected to an electrical load, a first load connection terminal extending from the load conduction member end and a second load connection terminal extending from the load conduction member end separately from the first load connection terminal;
a first load terminal and a second load terminal that are formed on the circuit board, the first load terminal being mechanically and electrically connected to the first load connection terminal of the load conduction member, the second load terminal being mechanically and electrically connected to the second load connection terminal of the load conduction member;
a first wiring pattern that is formed on the circuit board and connects the first power supply terminal and the first load terminal;
a second wiring pattern that is formed on the circuit board and connects the second power supply terminal and the second load terminal;
a first switch in the first wiring pattern;
a second switch in the second wiring pattern, wherein
the first power supply terminal, the first load terminal, the first wiring pattern and the first switch comprise a first current conduction path on the circuit board that is separate from and electrically parallel to a second current conduction path on the circuit board comprised of the second power supply terminal, the second load terminal, the second wiring pattern and the second switch.

2. The battery pack according to claim 1 , wherein:
the first power supply terminal and the first power supply connection terminal are soldered together and the second power supply terminal and the second power supply connection terminal are soldered together, and
the first load terminal and the first load connection terminal are soldered together and the second load terminal and the second load connection terminal are soldered together.

3. The battery pack according to claim 2 , wherein
the power supply conduction member is configured to be electrically connected to the power supply through a power supply wiring line,
the load conduction member is configured to be electrically connected to the electrical load through a load wiring line,
the power supply conduction member and the power supply wiring line are mechanically and electrically connected by at least one of screwing and fusion welding, such that a mechanical strength between the power supply conduction member and the power supply wiring line is higher than a mechanical strength of soldering between the first and second power supply terminals and the first and second power supply connection terminals, and
the load conduction member and the load wiring line are mechanically and electrically connected by at least one of screwing and fusion welding, such that a mechanical strength between the load conduction member and the load wiring line is higher than a mechanical strength of soldering between the first and second load terminals and the first and second load connection terminals.

4. The battery pack according to claim 1 , further comprising:
an opening/closing control unit that is configured to perform opening/closing control of the first and second switches, and
a failure detection unit that is configured to detect a failure in the first current conduction path between the first power supply terminal and the first load terminal and in the second current conduction path between the second power supply terminal and the second load terminal, wherein when at least one of the first and second switches is controlled to a closed state by the opening/closing control unit, the failure detection unit detects a current flowing through a current conduction path of the first and second current conduction paths that includes the at least one of the first and second switches in the closed state, and thereby detects a failure in the current conduction path of the first and second current conduction paths that includes the at least one of the first and second switches in the closed state.

5. The battery pack according to claim 1 , comprising:
an opening/closing control unit that is configured to perform opening/closing control of the first and second switches, and
a failure detection unit that is configured to detect a failure in the first current conduction path between the first power supply terminal and the first load terminal and in the second current conduction path between the second power supply terminal and the second load terminal, wherein when at least one of the first and second switches is controlled to a closed state and the other of the first and second switches is controlled to an opened state by the opening/closing control unit, the failure detection unit detects voltages of the first and second switches, and thereby detects a failure in one of the first and second current conduction paths.

6. The battery pack according to claim 1 , wherein
the first current conduction path including the first wiring pattern and the first switch is higher in withstand current than the second current conduction path including the second wiring pattern and the second switch.

7. A power supply system comprising:
a power supply;
a circuit board;
a power supply conduction member that (1) is separate from the circuit board and (2) includes a power supply conduction member end that is electrically connected to the power supply, a first power supply connection terminal extending from the power supply conduction member end and a second power supply connection terminal extending from the power supply conduction member end separately from the first power supply connection terminal;
a first power supply terminal and a second power supply terminal that are formed on the circuit board and are mechanically and electrically connected to the first and second power supply connection terminals of the power supply conduction member;
an electrical load;
a load conduction member that (1) is separate from the circuit board and (2) includes a load conduction member end that is electrically connected to the electrical load, a first load connection terminal extending from the load conduction member end and a second load connection terminal extending from the load conduction member end separately from the first load connection terminal;
a first load terminal and a second load terminal that are formed on the circuit board, and are mechanically and electrically connected to the first and second load connection terminals of the load conduction member;
a first wiring pattern that is formed on the circuit board and connects the first power supply terminal and the first load terminal;
a second wiring pattern that is formed on the circuit board and connects the second power supply terminal and the second load

Assignees

• Denso Corp

Inventors

• Takahashi Shin

Classifications

• H02J7/70

  characterised by the mechanical construction · CPC title

• H02J7/50

  acting upon multiple batteries simultaneously or sequentially · CPC title

• H02J7/865

  Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence) · CPC title

• H02J7/855

  with circuits adapted for supplying loads from the battery · CPC title

• H02J7/575

  Parallel/serial switching of connection of batteries to charge or load circuit · CPC title