Battery pack

Patent metadata

Field	Value
Publication number	US-11038211-B2
Application number	US-201916674327-A
Country	US
Kind code	B2
Filing date	Nov 5, 2019
Priority date	Nov 9, 2018
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

The disclosure relates to a battery pack, comprising a casing; a built-in circuit disposed inside the casing; a consumable component disposed inside the casing and connected in series to the built-in circuit, wherein an opening corresponding to the consumable component is provided on the casing; a safety switch disposed inside the casing, wherein an on/off of the safety switch controls a connection/disconnection of the built-in circuit; and a cover body disposed corresponding to the opening, wherein the cover body has a first state in which the cover body is capped at the opening, so that the safety switch is switched on and the built-in circuit is connected, and a second state in which the cover body is detached from the opening, so that the safety switch is switched off and the built-in circuit is disconnected.

First claim

What is claimed is:

1. A battery pack, comprising:
a casing;
a circuit disposed inside the casing;
a fuse disposed inside the casing and connected in series to the circuit, wherein an opening corresponding to the fuse is provided on the casing;
a switch disposed inside the casing, wherein the switch is connected in series with the circuit to control a connection/disconnection of the circuit; and
a cover body disposed corresponding to the opening, wherein the cover body is configured to have a first state in which the switch is switched on to connect the circuit when the cover body is capped at the opening and a second state in which the switch is switched off to disconnect the circuit when the cover body is detached from the opening, wherein,
the switch comprises a stationary contact, a movable contact capable of contacting the stationary contact under a driving action from the cover body, and a reset member coupled to the movable contact such that the movable contact is moved by a reset deformation of the reset member between a first position in which the movable contact is connected to the stationary contact to switch on the switch and a second position in which the movable contact is separated from the stationary contact to switch off the switch,
a number of the reset member is two, the two reset members are respectively disposed on two sides of the movable contact, and the two reset members are a first reset member and a second reset member, respectively;
the movable contact has a first surface and a second surface which are disposed opposite to each other, one end of the first reset member in a reset deformation direction thereof is disposed corresponding to the opening, and the other end is coupled to the first surface, and one end of the second reset member in the reset deformation direction thereof is coupled to the second surface;
the switch further comprises a control column, which is coupled to one end of the first reset member and disposed corresponding to the opening, and a contact surface of the control column adjacent to the cover body is a smooth surface; and
the switch further comprises a housing including a bottom plate and an upper housing, the stationary contact and the second reset member are fixed to the bottom plate, the movable contact, the first reset member and the control column are sequentially arranged within the upper housing, and a through hole is provided on a side of the upper housing opposite to the bottom plate to enable the control column to be protruded out of the through hole.

2. The battery pack according to claim 1 , wherein
the movable contact is disposed corresponding to the opening, so that the movable contact is driven to move from the second position to the first position when the cover body is moved from the second state to the first state.

3. The battery pack according to claim 2 , wherein the movable contact is elastic such that the movable contact is moved between the first position and the second position by its own elastic force.

4. The battery pack according to claim 1 , wherein
one end of the reset member in a reset deformation direction thereof is coupled to the movable contact, and the other end is disposed corresponding to the opening, so that the cover body drives the movable contact to move by the reset member; or
one end of the reset member in the reset deformation direction thereof is coupled to a side of the movable contact facing away from the cover body, so that the cover body directly drives the movable contact to move.

5. The battery pack according to claim 1 , wherein
a number of the stationary contact is two, and the two stationary contacts are spaced apart in a first direction; and
the movable contact is extended in the first direction to be simultaneously connectable to the two stationary contacts.

6. The battery pack according to claim 1 , wherein the battery pack further comprises an accommodation space for accommodating the switch, and the accommodation space is in communication with the opening to enable the control column to be protruded out of the opening.

Assignees

• Contemporary Amperex Technology Co Ltd

Inventors

• Zeng Min
• Jiang Yadong
• Qian Mu
• He Zesheng

Classifications

• H01M50/271

  Lids or covers for the racks or secondary casings · CPC title

• H01M2010/4271

  Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing · CPC title

• H01M2200/00

  Safety devices for primary or secondary batteries · CPC title

• H01M10/4257 Primary

  Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries · CPC title

• H01H13/183 Primary

  for actuation by moving a closing member, e.g. door, cover (H01H13/186, H01H27/002 take precedence; the switch controlling enclosed equipment H01H9/226) · CPC title