CN209592214U

CN209592214U - A kind of energy storage lithium ion battery

Info

Publication number: CN209592214U
Application number: CN201920446734.0U
Authority: CN
Inventors: 陈迪; 董亚锋; 张红刚
Original assignee: Shenzhen Jinneng Battery Technology Co Ltd
Current assignee: Shenzhen Jinneng Battery Technology Co Ltd
Priority date: 2019-04-03
Filing date: 2019-04-03
Publication date: 2019-11-05
Anticipated expiration: 2029-04-03

Abstract

The utility model relates to technical field of lithium ion, especially a kind of energy storage lithium ion battery, including battery case, battery core and electrolyte, battery core is arranged in the battery case full of electrolyte, battery case bottom is provided with the linear piston driver for perceiving expansion, diaphragm is horizontally arranged in the middle part of battery case, linear piston driver includes piston, piston rod and spring, piston is contacted with diaphragm bottom surface, upper cover of piston rod is equipped with spring, piston rod top end is connect with piston, piston rod bottom is plugged in the through-hole of battery case bottom, the upper surface of diaphragm is provided with pressing plate, pressing plate, piston and piston rod are fixedly connected by centre bolt, prevent battery from excessively expanding the case where causing explosion by the way that the linear piston driver of cell expansion can be perceived in the setting of battery case bottom；And the air pressure that linear piston driver can generate battery cavities compensates, and prevents the generation of cell expansion in the short time.

Description

A kind of energy storage lithium ion battery

Technical field

The utility model relates to technical field of lithium ion, especially a kind of energy storage lithium ion battery.

Background technique

Lithium ion battery is a kind of secondary cell (rechargeable battery), it relies primarily on lithium ion and moves between a positive electrode and a negative electrode Move and carry out work, in charge and discharge process, Li+ insertion and deintercalation back and forth between two electrodes, when charging, Li+ from positive deintercalation, It is embedded in cathode by electrolyte, cathode is in lithium-rich state, then on the contrary, the electrolyte according to used in lithium ion battery when electric discharge Difference, lithium ion battery is divided into liquid lithium ionic cell (referred to as LIB) and polymer Li-ion battery (referred to as PLB), Lithium ion battery energy density is big, and average output voltage is high.

Current lithium ion battery be by positive plate and negative electrode tab after roll-in, film-making process, using diaphragm be isolated into Row lamination or winding are prepared into battery core, and then battery core is put into battery case, removes moisture removal using baking, finally will electrolysis Liquid injects in shell, then lithium ion battery is prepared through processes such as sealing, chemical conversion, detections, but lithium ion battery is using In the process, repeatedly resetting electric rear portion electrolyte can decompose, to generate gas, make cell expansion, existing battery is expanding It can not be found in advance before to a certain extent, when being found until excessively expanding, battery cannot be used, and cause wave Take, is badly in need of a kind of battery of energy sensed in advance expansion.

Utility model content

In order to overcome the shortcomings of that existing battery lacks perception expansion, the utility model provides a kind of energy storage lithium-ion electric Pond is solved the problems, such as by the way that linear piston driver is arranged in battery bottom.

The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of energy storage lithium ion battery, including electricity Pond shell, battery core and electrolyte, battery core are formed by positive plate, negative electrode tab and membrane winding, and battery core is arranged in full of electrolyte In battery case, battery case bottom is provided with the linear piston driver for perceiving expansion, laterally sets in the middle part of battery case It is equipped with diaphragm, diaphragm will be separated into battery cavities of the top with battery core and lower bands linear piston driver inside battery case Perception chamber, battery case is divide into upper part and lower part by diaphragm, by linear piston driver to cell expansion carry out Perception.

Further, including linear piston driver includes piston, piston rod and spring, and piston connects with diaphragm bottom surface Touching, upper cover of piston rod are equipped with spring, and piston rod top end is connect with piston, and piston rod bottom is plugged in the through-hole of battery case bottom It is interior.

Further, the upper surface including diaphragm is provided with pressing plate, pressing plate, piston and piston rod by centre bolt into Row is fixedly connected, and is fixed by the pressing plate and piston of upper and lower side to diaphragm.

Further, it is fixedly connected, is convenient for by the positioning bolt of two sides with lower case by upper housing including battery case Disassembly.

Further, it is arranged on upper housing and the Mosaic face of lower case including diaphragm, good positioning effect.

The utility model has the beneficial effects that passing through the linear work that can perceive cell expansion in the setting of battery case bottom Plug driver causes the case where exploding to prevent battery from excessively expanding；And the air pressure that linear piston driver can generate battery cavities It compensates, prevents the generation of cell expansion in the short time；Battery cavities and perception chamber can be carried out closed separation by diaphragm, be prevented The case where battery cavities leak；The split type structure of battery case not only makes easy for assemble or unload quick, moreover it is possible to middle part Diaphragm carries out effective position.

Detailed description of the invention

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 is the structural schematic diagram of the utility model.

1. battery case in figure, 11. upper housings, 12. lower cases, 2. battery cores, 3. electrolyte, 4. linear piston drivers, 41. piston, 42. piston rods, 43. springs, 5. diaphragms, 6. battery cavities, 7. perception chambers, 8. through-holes, 9. pressing plates, 10. center spiral shells Bolt.

Specific embodiment

If Fig. 1 is the structural schematic diagram of the utility model, a kind of energy storage lithium ion battery, including battery case 1, battery core 2 With electrolyte 3, battery core 2 is formed by positive plate, negative electrode tab and membrane winding, and the battery case full of electrolyte 3 is arranged in battery core 2 In 1,1 bottom of battery case is provided with the linear piston driver 4 for perceiving expansion, is horizontally arranged in the middle part of battery case 1 Diaphragm 5, diaphragm 5 will be separated into battery cavities 6 of the top with battery core 2 and the driving of lower bands linear piston inside battery case 1 The perception chamber 7 of device 4, linear piston driver 4 include piston 41, piston rod 42 and spring 43, and piston 41 connects with 5 bottom surface of diaphragm It touches, is arranged with spring 43 on piston rod 42,42 top of piston rod is connect with piston 41, and 42 bottom of piston rod is plugged in battery case In the through-hole 8 of 1 bottom, the upper surface of diaphragm 5 is provided with pressing plate 9, and pressing plate 9, piston 41 and piston rod 42 pass through centre bolt 10 are fixedly connected, and battery case 1 is fixedly connected with lower case 12 by the positioning bolt of two sides by upper housing 11, diaphragm 5 are arranged between upper housing 11 and the Mosaic face of lower case 12.

When installing and using, linear piston driver 4 is mounted on 1 bottom of battery case first, so that 42 bottom of piston rod It is just plugged in the through-hole 8 of 1 bottom of battery case, spring 43 is set on piston rod 42, and spring 43 is in the shape discharged completely Under state, can make just piston rod 42 completely contracting in battery case 1, and the bottom of piston rod 42 with 1 bottom edge of battery case same In one plane, diaphragm 5 is then placed on 41 top of piston, and set pressing plate 9 in 5 upper cover of diaphragm and limit diaphragm 5 Position is fixed, and the edges at two ends of diaphragm 5 is folded between upper housing 11 and lower case 12, and compress admittedly by positioning bolt Fixed, diaphragm 5 is waterproof ventilated membrane, is a kind of novel high polymer waterproof material, and liquid barrier can only pass the gas through, When in battery cavities 6 electrolyte 3 dispersion generate gas after, can forces piston 41 move downward, piston 41 drive piston rod 42 from It stretches out in through-hole 8, linear piston driver 4, which is converted to gas or fluid pressure, not to be revealed or the linear row of frictional influence Journey while compensating to air pressure in battery cavities 6, drives piston rod 42 to stretch out shell, can intuitively be found by staff Cell expansion problem, in order to handle and repair in time.

It is described above to be merely exemplary for the utility model, and not restrictive, those of ordinary skill in the art Understand, in the case where not departing from spirit and scope as defined in the appended claims, many modifications can be made, change or wait Effect, but all will fall within the protection scope of the utility model.

Claims

1. a kind of energy storage lithium ion battery, including battery case (1), battery core (2) and electrolyte (3), battery core (2) by positive plate, Negative electrode tab and membrane winding form, and battery core (2) setting is in the battery case (1) full of electrolyte (3), characterized in that described Battery case (1) bottom is provided with the linear piston driver (4) for perceiving expansion, laterally setting in the middle part of battery case (1) Have diaphragm (5), diaphragm (5) will be separated into battery cavities (6) and lower bands of the top with battery core (2) inside battery case (1) The perception chamber (7) of linear piston driver (4).

2. a kind of energy storage lithium ion battery according to claim 1, characterized in that linear piston driver (4) packet Piston (41), piston rod (42) and spring (43) are included, piston (41) is contacted with diaphragm (5) bottom surface, and piston rod is arranged on (42) Have spring (43), piston rod (42) top is connect with piston (41), and piston rod (42) bottom is plugged in battery case (1) bottom In through-hole (8).

3. a kind of energy storage lithium ion battery according to claim 2, characterized in that the upper surface of the diaphragm (5) is set It is equipped with pressing plate (9), pressing plate (9), piston (41) and piston rod (42) are fixedly connected by centre bolt (10).

4. a kind of energy storage lithium ion battery according to claim 1, characterized in that the battery case (1) is by upper housing (11) it is fixedly connected with lower case (12) by the positioning bolt of two sides.

5. a kind of energy storage lithium ion battery according to claim 4, characterized in that the diaphragm (5) is arranged in upper casing Between body (11) and the Mosaic face of lower case (12).