CN212625721U

CN212625721U - Soft package lithium ion battery pressurization mechanism and battery pack

Info

Publication number: CN212625721U
Application number: CN202021419106.2U
Authority: CN
Inventors: 张献海; 顾霞; 刘晨
Original assignee: Nantong Hardcore Lithium Battery Co ltd
Current assignee: Nantong Hardcore Lithium Battery Co ltd
Priority date: 2020-07-18
Filing date: 2020-07-18
Publication date: 2021-02-26
Anticipated expiration: 2030-07-18

Abstract

The utility model relates to a lithium cell technical field specifically relates to a soft packet of lithium ion battery loading system and group battery. The utility model provides a group battery is including protective housing, soft packet of lithium ion battery core subassembly, clamp plate and elastomer, and this casing is including the shell body and the upper cover of roughly U-shaped, and the clamp plate is located soft packet of lithium ion battery core subassembly upper end, and the elastomer is located between clamp plate and the upper cover, is equipped with the first arch of fixed elastomer on the clamp plate, and the corresponding position of upper cover internal surface is equipped with the second arch of fixed elastomer, and clamp plate, elastomer and upper cover constitute a soft packet of lithium ion battery loading system. This loading system simple structure, the equipment is convenient, light in weight, with low costs, effectual, compare in traditional art, soft packet of lithium ion battery group has great promotion on charge-discharge cycle life.

Description

Soft package lithium ion battery pressurization mechanism and battery pack

Technical Field

The utility model relates to a lithium cell technical field specifically relates to a soft packet of lithium ion battery loading system and group battery.

Background

Lithium power batteries are generally formed by connecting a plurality of single battery cells in series or in series and parallel. The single battery cell is divided into an aluminum shell/steel shell battery and a soft package battery according to different shells. The aluminum shell/steel shell battery has the advantages of good strength and simple and convenient external assembly, but the plasticity of the aluminum shell/steel shell battery is inferior to that of a soft package battery, and when a large amount of gas is generated inside the aluminum shell/steel shell battery, the internal gas cannot be discharged due to strong rigidity of the shell, so that explosion accidents are easily caused. The single soft package battery has the advantages of flexible design, good safety performance, good heat and electricity conducting performance, wide adaptive temperature, large-current charge and discharge and the like, and becomes the first choice of the current high-power supply.

In the continuous charging and discharging process of the lithium ion battery pack, lattices of the anode material and the cathode material are easy to deform, such as the collapse of a cathode graphite structure, the gas expansion phenomenon of the battery is further aggravated, the capacity of the battery is damaged, and the cycle life of the battery is seriously influenced. On the other hand soft packet of lithium ion battery process dimension is difficult to be completely unanimous, is difficult to the accuracy fixed when the shell encapsulation, although EVA is pasted to the shell inlayer bottom of group battery, has temporarily fixed the group battery and can not remove in the shell the inside, nevertheless because the viscose is ageing with rock for a long time, the group battery drops easily, has reduced the security, becomes the important problem of encapsulation design.

SUMMERY OF THE UTILITY MODEL

The utility model aims at foretell not enough, and the soft packet of lithium ion battery loading system and group battery that provide to improve current soft packet of lithium ion battery group in the use of manifold cycles, the technical problem of the interface deformation and the flatulence of positive and negative pole piece.

The technical scheme of the utility model is that: a battery pack, characterized in that: including protective housing, soft packet of lithium ion battery core subassembly, clamp plate and elastomer, the casing is including the shell body and the upper cover of roughly U-shaped, the shell body holds the soft packet of lithium ion battery core subassembly of keeping flat, the clamp plate is located soft packet of lithium ion battery core subassembly upper end, the elastomer is located between clamp plate and the upper cover, be equipped with the first arch that is used for fixed elastomer on the clamp plate, the corresponding position of upper cover internal surface is equipped with the second arch that is used for fixed elastomer.

A soft package lithium ion battery pressurizing mechanism comprises the pressing plate, an elastic body and an upper cover.

The utility model provides a certain pressure is applyed to soft packet of lithium ion battery through loading mechanism to the group battery, carries out charge-discharge under the good condition in the inside pole piece interface of assurance electric core, has eliminated the inhomogeneous problem of charge-discharge that the polarization that the group battery produced when charging and discharging for a long time leads to, has stabilized the SEI membrane on negative pole surface, compares the conventional art, and soft packet of lithium ion battery group has great promotion on charge-discharge cycle life. The utility model provides a loading system simple structure, the equipment is convenient, light in weight, and is with low costs, effectual.

Drawings

FIG. 1 is a schematic view of a housing according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a soft package lithium ion core assembly according to an embodiment of the present invention;

fig. 3 is a schematic view of a pressurizing mechanism according to an embodiment of the present invention;

FIG. 4 is a top view of a platen according to an embodiment of the present invention;

fig. 5 is a left side view of a platen according to an embodiment of the present invention;

fig. 6 is a top view of the housing according to an embodiment of the present invention;

fig. 7 is a bottom view of the upper cover according to the embodiment of the present invention.

In the figure, 1-shell, 2-soft package lithium ion core assembly, 3-pressing plate, 4-spring, 5-reinforcing rib, 6-first protrusion, 7-second protrusion, 101-shell body and 102-upper cover

Detailed Description

Referring to fig. 1 to 7, the present invention provides a battery pack, which comprises a protective casing 1, a soft package lithium ion core assembly 2, a pressing plate 3 and a plurality of springs 4. The housing 1 includes a housing body 101 and an upper cover 102. The pressing plate 3 can be made of engineering plastics or a metal plate coated with high-temperature insulating paint, and can also be of a local hollow structure beneficial to heat dissipation. The spring 4 is positioned between the pressure plate 3 and the upper cover 102, the pressure plate 3 is provided with a first protrusion 6 for fixing the spring 4, and the corresponding part of the inner surface of the upper cover 102 is provided with a second protrusion 7 for fixing the spring 4. In one embodiment, the upper portion of the pressure plate 3 is further provided with a reinforcing rib 5, and the first protrusion 6 is provided at the intersection of the reinforcing rib 5. The pressing plate 3, the spring 4 and the upper cover 102 constitute a pressing mechanism by the first protrusion 6 and the second protrusion 7. During the use with soft packet of lithium ion core subassembly 2 place into in shell body 101, after having connected the circuit, arrange this loading system in soft packet of lithium ion core subassembly 2 on, exert certain pressure, close upper cover 102 and shell body 101 and cover the back and carry out ultrasonic bonding.

The above description is only the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the concept of the present invention within the technical scope disclosed in the present invention.

Claims

1. A battery pack, characterized in that: including protective housing, soft packet of lithium ion battery core subassembly, clamp plate and elastomer, the casing is including the shell body and the upper cover of roughly U-shaped, the shell body holds the soft packet of lithium ion battery core subassembly of keeping flat, the clamp plate is located soft packet of lithium ion battery core subassembly upper end, the elastomer is located between clamp plate and the upper cover, be equipped with the first arch of fixed elastomer on the clamp plate, the corresponding position of upper cover internal surface is equipped with the second arch of fixed elastomer, clamp plate, elastomer and upper cover constitute a soft packet of lithium ion battery loading system.

2. A battery pack as claimed in claim 1, wherein: the elastic body is a plurality of springs.

3. A battery pack as claimed in claim 1, wherein: the pressing plate is made of engineering plastics.

4. A battery pack as claimed in claim 1, wherein: the pressing plate is a metal plate coated with high-temperature insulating paint.

5. A battery pack as claimed in claim 3 or 4, wherein: the pressing plate is partially hollow.

6. A battery pack as claimed in claim 3 or 4, wherein: the upper part of the pressure plate is provided with a reinforcing rib, and the first protrusion is arranged at the intersection of the reinforcing rib.

7. A battery pack as claimed in claim 5, wherein: the upper part of the pressure plate is provided with a reinforcing rib, and the first protrusion is arranged at the intersection of the reinforcing rib.

8. A battery pack as claimed in claim 1, wherein: the shell is made of thermoplastic engineering plastics, and the shell body and the upper cover are subjected to ultrasonic welding after being covered.