Battery pack

Patent metadata

Field	Value
Publication number	US-10103365-B2
Application number	US-201414583320-A
Country	US
Kind code	B2
Filing date	Dec 26, 2014
Priority date	Dec 31, 2013
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

A battery pack provides a high voltage output. The battery pack includes a battery housing, and a battery cell assembly arranged inside the battery housing. The battery cell assembly comprises a trapezoid portion having a plurality of battery cells arranged in parallel, wherein the trapezoid portions defines a trapezoid formed by the connection of the reference points of the cross sections of the battery cells successively.

First claim

What is claimed is:

1. A battery pack comprising:
a battery housing;
a battery cell assembly arranged inside the battery housing, the battery cell assembly comprising:
a trapezoid portion comprising a plurality of battery cells arranged in parallel, the trapezoid portions defines a trapezoid formed by the connection of the reference points of the cross sections of the battery cells successively, the trapezoid comprising:
a long baseline;
a short baseline parallel to the long baseline; and
two sidelines connecting the long baseline and the short baseline from both sides respectively;
wherein the long baseline is formed only by the connection of the reference points of the cross sections of two battery cells separated by a space;
the short baseline at least connecting the reference points of the cross sections of at least two or more battery cells; and
the sidelines at least connecting the reference points of the cross sections of at least two or more battery cells,
wherein the long baseline of the trapezoid portion is located on an edge of the battery cell assembly; and

a connection terminal operably coupled to the battery housing and the battery cell assembly to enable the battery cell assembly to output electric energy,
the battery housing comprising:
installation guide rails capable of guiding the battery pack to connect to a charger or an electrical appliance at least along a first direction perpendicular to the cross section of the battery cell;
the battery housing having a housing groove at least formed between two battery cells which form the long baseline by the connection of the reference points of the cross sections thereof;
wherein one of the installation guide rails is at least formed by a guiding groove 211 extending along the first direction, the guiding groove 211 being opened in the front along the first direction, and
wherein the battery housing defines a first maximum projection plane (A), and the projected area of the battery housing in the first maximum projection plane (A) is larger than that in other planes, the cross section of the battery cell being perpendicular to the first maximum projection plane (A) of the battery housing, the battery cell assembly defining a second maximum projection plane (B), and the projected area of the battery cell assembly in the second maximum projection plane (B) being larger than that in other plane; the cross section of the battery cell being perpendicular to the second maximum projection plane (B) of the battery cell assembly; the first maximum projection plane (A) of the battery housing being parallel to the second maximum projection plane (B) of the battery cell assembly,
wherein said battery cell assembly comprises a left unit body ( 122 ) and a right unit body ( 123 ) which are mirror-symmetrical, and a connecting unit body ( 124 ) provided there between, wherein said left unit body ( 122 ) and said right unit body ( 123 ) form mirror symmetry, and a symmetrical mirror surface is perpendicular to a maximum projection surface (A) of said battery cell assembly ( 12 ),
wherein, if said maximum projection surface of said parallel battery cell assembly is regarded as being in the horizontal direction, said left unit body and right unit body go beyond the connecting unit body on both upper and lower sides and form two grooves ( 124 a ) and ( 124 b ) having different sizes on both sides of said connecting unit body, and
wherein a distance of each of the connection terminals from an outer surface of the insert housing wall is greater than or equal to 7 mm.

2. The battery pack according to claim 1 , wherein the trapezoid portion defines only one trapezoid.

3. The battery pack according to claim 2 , wherein the battery cell assembly comprises two trapezoid portions, and the longest long baseline in one of the trapezoid portions is longer than the longest long baseline in the other trapezoid portion.

4. The battery pack according to claim 3 , wherein the short baselines of the two trapezoid portions coincide in the same line.

5. The battery pack according to claim 4 , wherein the battery cell is a cylindrical lithium battery.

6. The battery pack according to claim 5 , wherein the trapezoids are all isosceles trapezoids.

7. The battery pack according to claim 6 , wherein the battery cells in the battery cell assembly are arranged mirror-symmetrically with respect to the symmetry axis of the trapezoid.

8. The battery pack according to claim 1 , wherein the battery housing comprises:
installation guide rails to guide the battery pack to connect to at least one of a charger or an electrical appliance at least along a first direction perpendicular to the cross section of the battery cell.

9. The battery pack according to claim 8 , wherein the battery pack further comprises a connection terminal to enable the battery cell to output electric energy and two installation guide rails, wherein the connection terminal is at least partially arranged between the two installation guide rails.

10. The battery pack according to claim 1 , wherein the battery housing comprises installation guide rails to guide the battery pack to connect to at least one of a charger or an electrical appliance at least along a first direction perpendicular to the cross section of the battery cell, and wherein the battery defines a housing groove at least formed between two battery cells which form the long baseline by the connection of the reference points of the cross sections thereof.

11. The battery pack according to claim 10 , wherein the installation guide rails include two installation guide rails, and at least one housing groove is arranged between the two installation guide rails.

12. The battery pack according to claim 10 , wherein the battery pack further comprises a connection terminal to enable the battery cell to output electric energy, the connection terminal being at least partially arranged inside the housing groove, in a plane parallel to the cross section of the battery cell.

13. The battery pack according to claim 10 , wherein the housing groove is provided with a heat dissipation hole, the housing groove comprising a groove bottom surface parallel to the first direction on which the ventilation hole is arranged.

14. The battery pack according to claim 1 , wherein the connection terminal is located proximate to the rear of the guiding groove along the first direction.

15. The battery pack according to claim 14 , wherein the battery housing defines two guiding grooves, at least one of the housing grooves being arranged between the two guiding grooves, and the notches of the guiding grooves all face to the side of the housing groove.

16. The battery pack according to claim 1 , wherein the battery pack further comprises a connection terminal to enable the battery cell to output electric energy, the battery housing comprising:
two installation guide rails configured to guide the battery pack to connect to at least one of a charger or an electrical appliance at least along the first direction perpendicular to the cross section of the battery cell;
a stopping housing wall with at least part of the wall surface thereof perpendicular to the first direction;
the battery housing having a housing groove at least formed between two battery cells which form the long baseline by the connection of the reference points of the cross sections thereof;
wherein the front of the housing groove having the largest width is opened, and the stopping housing wall is arranged in the rear of the housing groove, the connection terminal being arranged inside the st

Assignees

• Chervon Ip Ltd
• Chervon Hk Ltd

Inventors

• Zhang Yuexiang
• Lin Xiaohong
• Yuan Tianshi

Classifications

• H01M50/107

  having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence) · CPC title

• H01M50/296 Primary

  characterised by terminals of battery packs (terminals of batteries H01M50/543) · CPC title

• H01M2/1055

  Electricity · mapped topic

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M2/30

  Electricity · mapped topic