CN210092285U

CN210092285U - Sealed liquid leakage prevention soft package battery

Info

Publication number: CN210092285U
Application number: CN201920973320.3U
Authority: CN
Inventors: 沈彩云
Original assignee: Shenzhen Liyawang Battery Co Ltd
Current assignee: Shenzhen Liyawang Battery Co Ltd
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2020-02-18
Anticipated expiration: 2029-06-26

Abstract

The utility model relates to a sealed leak protection liquid laminate polymer battery, including laminate polymer battery body, frame, protection shield and sealing strip, the protection shield sets up the frame both sides, the sealing strip is installed the open end of frame, laminate polymer battery body installs the frame the protection shield with in the sealed space that the sealing strip is constituteed, the frame with the limit portion of protection shield is provided with the fixed ear that corresponds respectively, be provided with the liquid cooling pipeline in the frame, be provided with the liquid inlet joint on the sealing strip and go out the liquid joint, the liquid inlet joint with go out the liquid joint respectively with liquid cooling pipeline both ends intercommunication. The utility model discloses with the liquid cooling pipeline pre-buried to the frame, the frame can further protect the liquid cooling pipeline, avoids directly exposing the liquid cooling pipe outside, has reduced the risk that the liquid cooling pipeline receives the damaged weeping of outside extrusion.

Description

Sealed liquid leakage prevention soft package battery

Technical Field

The utility model relates to a laminate polymer battery technical field especially relates to a sealed leak protection liquid laminate polymer battery.

Background

The soft package lithium ion battery has the advantages of high energy density, good output performance, long service life and the like, and is widely applied to the new energy automobile industry. Because the automobile power output requirement is higher, a large number of single soft package batteries need to be connected in series and in parallel and integrated into a whole, the output current and the voltage are improved, and enough power can be brought to an automobile motor. However, since the surface temperature of the battery is easily over a preset threshold after a large number of soft package batteries are connected in series and in parallel, the soft package batteries need to be cooled, and the conventional cooling methods are generally divided into active cooling and passive cooling. The passive cooling method is simple, natural cooling is achieved, and the cooling effect is poor. The active cooling is divided into air cooling and liquid cooling, the air cooling easily causes the sealing performance of the soft package battery to be reduced, and the cooling effect is different from the liquid cooling by several times. Application number 201720539740.1 discloses a liquid cooling high magnification lithium battery module that wraps, the mode that adopts the liquid cooling cools off laminate polymer battery, but this scheme has the coolant liquid to leak the liquid risk, because set up the liquid cooling pipe in its scheme between laminate polymer battery and directly cool off laminate polymer battery, in case laminate polymer battery receives outside extrusion stress, leads to the liquid cooling pipe damaged easily, leads to the coolant liquid to leak.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a sealed liquid leakage prevention laminate polymer battery to the condition that laminate polymer battery liquid cooling system received the outside extrusion and leads to the weeping easily, can prevent the liquid cooling system weeping among the laminate polymer battery to reduce laminate polymer battery when receiving the outside extrusion, the casing damage leads to the risk of electrolyte leakage.

The utility model provides a sealed leak protection liquid laminate polymer battery, includes laminate polymer battery body, frame, protection shield and sealing strip, the protection shield sets up the frame both sides, the sealing strip is installed the open end of frame, laminate polymer battery body installs the frame the protection shield with in the sealed space that the sealing strip is constituteed, the frame with the limit portion of protection shield is provided with the fixed ear that corresponds respectively, be provided with the liquid cooling pipeline in the frame, be provided with the liquid inlet joint on the sealing strip and go out the liquid joint, the liquid inlet joint with go out the liquid joint respectively with liquid cooling pipeline both ends intercommunication.

Preferably, the laminate polymer battery body includes utmost point ear and casing, the casing is by outer PTFE layer, nylon layer, aluminium foil layer and polyethylene layer to interior in proper order.

Preferably, the protection plate is a hollow plate, and a V-shaped support piece is arranged in the protection plate.

Preferably, the sealing strip is provided with a through hole corresponding to the tab.

Preferably, the liquid cooling pipeline is an aluminum pipe, and the aluminum pipe is installed in the frame through an injection molding pre-embedding process.

Preferably, the liquid inlet joint and the liquid outlet joint are aluminum joints, and the liquid inlet joint and the liquid outlet joint are communicated with the two ends of the aluminum pipe through laser welding.

Preferably, the protective plate and one side adjacent to the frame are pasted with insulating heat-conducting silica gel.

The utility model discloses an useful part lies in: 1. the utility model discloses a mode of liquid cooling cools off laminate polymer battery body, and the cooling effect is good, with liquid cooling pipeline pre-buried to the frame in, the liquid cooling pipeline can further be protected to the frame, avoids directly exposing the liquid cooling pipe outside, has reduced the risk that the liquid cooling pipeline receives the damaged weeping of outside extrusion; 2. the utility model discloses a soft-package battery body's casing includes PTFE layer and nylon layer, and the PTFE layer wearability is good to the surface is smooth, cooperates the nylon layer, can effectively protect soft-package battery body, prevents that soft-package battery body from being punctured and leading to electrolyte to leak; 3. the protection shield adopts hollow slab, further protects laminate polymer battery body, prevents that laminate polymer battery body from receiving outside extrusion to lead to the damage, and the integration has support piece in the hollow slab, and hollow slab light in weight, and when a large amount of laminate polymer batteries are integrated as an organic whole, can effectively reduce laminate polymer battery group's weight, and then improve laminate polymer battery group's energy density.

Drawings

Fig. 1 is an exploded view of a sealed liquid-tight flexible package battery according to an embodiment;

fig. 2 is a schematic structural diagram of a housing of the pouch battery body in fig. 1;

FIG. 3 is a schematic top view of the bezel of FIG. 1;

FIG. 4 is a sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic front view of the protective plate of FIG. 1;

fig. 6 is a sectional view taken along line B-B in fig. 5.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1-6, a sealed leak protection liquid laminate polymer battery, including laminate polymer battery body 1, frame 2, protection shield 3 and sealing strip 4, protection shield 3 sets up 2 both sides of frame, the sealing strip 4 is installed the open end of frame 2, laminate polymer battery body 1 is installed frame 2 protection shield 3 with in the confined space that sealing strip 4 is constituteed, frame 2 with the limit portion of protection shield 3 is provided with corresponding fixed ear 7 respectively, be provided with liquid cooling pipeline 21 in the frame 2, be provided with liquid inlet joint 5 and play liquid joint 6 on the sealing strip 4, liquid inlet joint 5 with play liquid joint 6 respectively with liquid cooling pipeline 21 both ends intercommunication. Specifically, the utility model discloses a liquid cooling mode cools off laminate polymer battery body 1, and in order to prevent liquid cooling pipeline 21 weeping, the technical staff is integrated as an organic whole with liquid cooling pipeline 21 and frame 2, can prevent liquid cooling pipeline 21 weeping. And, frame 2 still can be as liquid cooling pipeline 21's protective sheath, prevents that liquid cooling pipeline from receiving outside extrusion damage, leads to the coolant liquid to leave over in encapsulated space, reduces the cooling effect to, hide liquid cooling pipeline 21 in frame 2, can reduce laminate polymer battery volume, and then improve laminate polymer battery's energy density. Meanwhile, the frame 2 and the protection plate 3 are correspondingly provided with four fixing lugs 7, and in other embodiments, other numbers of fixing lugs 7 may be provided. During the equipment, the staff can be through bolt (not shown in the figure) with two protection shield 3 and frame 2 fuse, constitute a laminate polymer battery monomer, when needs a plurality of laminate polymer battery monomer are in groups, can use stay bolt (not shown in the figure) to run through the hole site that corresponds on fixed ear 7 in proper order, with laminate polymer battery monomer in groups, the equipment is simple and convenient.

As shown in fig. 1-2, the pouch cell body 1 includes a tab 11 and a case 12, and the case 12 is sequentially composed of a PTFE layer 121, a nylon layer 122, an aluminum foil layer 123 and a polyethylene layer 124 from outside to inside. Specifically, the PTFE layer 121, the nylon layer 122, the aluminum foil layer 123 and the polyethylene layer 124 are connected through an adhesive, and the inner layer is the polyethylene layer 124 and is used for sealing, so that electrolyte leakage at the position of the tab 11 can be prevented. The aluminum foil layer 123 further improves the liquid leakage prevention effect and prevents external moisture from entering the case 12. The PTFE layer 121 and the nylon layer 122 have high strength, and the PTFE layer has a smooth surface and good wear resistance, and can prevent the case 12 from being punctured, which may result in leakage of the electrolyte.

As shown in fig. 5 to 6, the protection plate 3 is a hollow plate, and a V-shaped support 31 is disposed in the protection plate 3. Specifically, 3 light in weight of hollow platelike protection shield can alleviate laminate polymer battery group weight when a large amount of laminate polymer battery are in groups to, be provided with V-arrangement support piece 31 in hollow protection shield 3, can improve the anti extrusion ability of protection shield 3, protect laminate polymer battery body 1 not receive the damage.

As shown in fig. 1, the sealing strip 4 is provided with a through hole 41 corresponding to the tab 11, the liquid cooling pipeline 21 is an aluminum pipe, and the aluminum pipe 21 is installed in the frame 2 through an injection molding pre-embedding process. Specifically, the liquid cooling pipe 21 made of an aluminum pipe is light in weight and good in heat dissipation performance, and the heat dissipation effect of the soft package battery body 1 is guaranteed to be good.

As shown in fig. 1, the liquid inlet joint 5 and the liquid outlet joint 6 are aluminum joints, and the liquid inlet joint 5 and the liquid outlet joint 6 are communicated with two ends of the aluminum pipe 21 through laser welding. The liquid inlet joint 5 and the liquid outlet joint 6 are respectively connected with the aluminum pipe 21 through laser welding, so that liquid leakage at the connection part is prevented.

As shown in fig. 1 to 6, an insulating and heat conducting silica gel 32 is adhered to one side of the protection plate 3 adjacent to the frame 2.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a sealed leak protection liquid laminate polymer battery, includes laminate polymer battery body, frame, protection shield and sealing strip, its characterized in that: the utility model discloses a flexible package battery, including frame, protection shield, sealing strip, laminate polymer battery body, frame, liquid cooling pipeline, liquid inlet joint and liquid outlet joint, the protection shield sets up the frame both sides, the sealing strip is installed the open end of frame, laminate polymer battery body installs the frame, the protection shield with in the sealed space that the sealing strip is constituteed, the frame with the limit portion of protection shield is provided with corresponding fixed ear respectively, be provided with the liquid cooling pipeline in the frame, be provided with the liquid inlet joint on the sealing strip and go out the liquid joint, the liquid inlet joint.

2. The sealed liquid-leakage-proof soft package battery as claimed in claim 1, wherein: the soft package battery body comprises a tab and a shell, wherein the shell is sequentially provided with a PTFE layer, a nylon layer, an aluminum foil layer and a polyethylene layer from outside to inside.

3. The sealed liquid-leakage-proof soft package battery as claimed in claim 2, wherein: the protection shield is hollow plate, be provided with V-arrangement support piece in the protection shield.

4. The sealed liquid-leakage-proof soft package battery as claimed in claim 3, wherein: and the sealing strip is provided with through holes corresponding to the lugs.

5. The sealed liquid-leakage-proof soft package battery as claimed in claim 4, wherein: the liquid cooling pipeline is an aluminum pipe, and the aluminum pipe is installed in the frame through an injection molding pre-embedding process.

6. The sealed liquid-leakage-proof soft package battery of claim 5, wherein: the liquid inlet joint and the liquid outlet joint are aluminum joints, and the liquid inlet joint and the liquid outlet joint are communicated with the two ends of the aluminum pipe through laser welding.

7. The sealed liquid-leakage-proof soft package battery as claimed in claim 3, wherein: and the protective plate and one side adjacent to the frame are adhered with insulating heat-conducting silica gel.