CN211265613U

CN211265613U - Battery electrolyte drainage structure

Info

Publication number: CN211265613U
Application number: CN202020128789.XU
Authority: CN
Inventors: 罗冰洋; 朱悦悦; 王菁; 康健强; 朱国荣; 熊松; 邓翔天; 庞牧野
Original assignee: Wuhan University of Technology WUT
Current assignee: Wuhan University of Technology WUT
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-08-14
Anticipated expiration: 2030-01-19

Abstract

The utility model discloses a battery electrolyte drainage structure, it presss from both sides and locates between two adjacent battery cells, battery electrolyte drainage structure include drainage layer, imbibition strip, drainage layer includes first cambered surface portion, second cambered surface portion, first cambered surface portion, second cambered surface portion are a plurality of, the axis of first cambered surface portion and second cambered surface portion is all vertical to be arranged, and two adjacent first cambered surface portion adjacent sides respectively smooth connection in the both sides of same second cambered surface portion, the protruding cambered surface butt of first cambered surface portion in the outer wall of a battery cell, the protruding cambered surface butt of second cambered surface portion in the outer wall of another battery cell, when the battery cell lateral wall takes place the breakage, the electrolyte that leaks can follow the concave cambered surface of first cambered surface portion or the concave cambered surface of second cambered surface portion and flow down on the imbibition strip, and is absorbed by the liquid absorbing strip, so that the serious corrosion caused by the accumulation of electrolyte above the single battery shell is avoided.

Description

Battery electrolyte drainage structure

Technical Field

The utility model relates to a battery technology field, concretely relates to battery electrolyte drainage structure.

Background

At present, in order to ensure the operation safety of the battery, a battery safety valve is usually arranged on each single battery in the battery module, the battery safety valve is a general safety part of the battery module, when the internal pressure of the single battery is too large and exceeds a threshold value set by the battery safety valve, the battery safety valve is opened, and electrolyte can be splashed all around.

If the electrolyte is splashed to the battery shell to form accumulated liquid, the battery shell is corroded to cause perforation leakage; electrolyte still probably forms the electrolysis between battery utmost point post and battery case, battery lead electrically arrange and battery case, two voltages have the joint battery metal casing of difference and lead to the possible short circuit of metal film or electric arc, constitutes the potential safety hazard to urgent need set up an occupation space less in compact structure's battery module, and can realize the electrolyte drainage structure of drainage.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned technique not enough, provide a battery electrolyte drainage structure, the drainage of the electrolyte of leaking between the adjacent battery cell in the battery module that has realized to occupation space is less.

In order to achieve the above technical purpose, the technical solution of the present invention provides a battery electrolyte drainage structure, which is clamped between two adjacent single batteries, wherein the battery electrolyte drainage structure comprises a drainage layer and a liquid absorption strip, the drainage layer comprises a first cambered surface portion and a second cambered surface portion, the first cambered surface portion and the second cambered surface portion are respectively a plurality of parts, the axes of the first cambered surface portion and the second cambered surface portion are both vertically arranged, and the adjacent sides of the two adjacent first cambered surface portions are respectively and smoothly connected to the two sides of the same second cambered surface portion, the convex cambered surface of the first cambered surface portion is abutted against the outer wall of one single battery, and the convex cambered surface of the second cambered surface portion is abutted against the outer wall of the other single battery; the liquid absorbing strip is arranged at the lower end of the drainage layer.

Compared with the prior art, the beneficial effects of the utility model include: this battery electrolyte drainage structure presss from both sides and locates between two adjacent battery cells, when the battery cell lateral wall takes place the breakage, the electrolyte that leaks can flow downwards on the imbibition strip from the concave cambered surface of first cambered surface portion or the concave cambered surface of second cambered surface portion, and by the imbibition strip is absorbed, and also can flow downwards on the imbibition strip from the battery safety valve spun electrolyte under the effect of gravity from the concave cambered surface of first cambered surface portion or the concave cambered surface of second cambered surface portion, and by the imbibition strip is absorbed, avoided the accumulation of electrolyte above the battery cell shell to cause serious corrosion to above-mentioned drainage structure occupation space is less, compact structure.

Drawings

Fig. 1 is a schematic structural view of an installation position of an embodiment of a battery electrolyte drainage structure provided by the present invention;

FIG. 2 is a schematic top view of the structure of FIG. 1;

fig. 3 is an explosion structure diagram of the battery electrolyte drainage structure provided by the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, 2 and 3, the present embodiment provides a battery electrolyte drainage structure, which is clamped between two adjacent single batteries 1, and a positive post 1b, a battery safety valve 1a and a negative post 1c are sequentially arranged on the upper end surface of each single battery 1 along the length direction at intervals.

Battery electrolyte drainage structure include drainage layer 2, imbibition strip 3, drainage layer 2 includes first cambered surface portion 21, second cambered surface portion 22, first cambered surface portion 21, second cambered surface portion 22 are a plurality of, first cambered surface portion 21 with the equal vertical arrangement of axis of second cambered surface portion 22, and adjacent two the adjacent side of first cambered surface portion 21 is smooth connection respectively in same the both sides of second cambered surface portion 22, the protruding cambered surface butt of first cambered surface portion 21 in one the outer wall of cell 1, the protruding cambered surface butt of second cambered surface portion 22 in another the outer wall of cell 1 can understand that the cross-section of the horizontal direction of drainage layer 2 is the wave.

The liquid absorbing strip 3 is arranged at the lower end of the drainage layer 2, and in the embodiment, the liquid absorbing strip 3 can be made of sponge or wool felt containing fire retardant.

When the side wall of the single battery 1 is damaged, the leaked electrolyte can flow downwards onto the liquid absorbing strip 3 from the concave arc surface of the first arc surface part 21 or the concave arc surface of the second arc surface part 22 and is absorbed by the liquid absorbing strip 3, and the electrolyte sprayed from the battery safety valve 1a can also flow downwards onto the liquid absorbing strip 3 from the concave arc surface of the first arc surface part 21 or the concave arc surface of the second arc surface part 22 under the action of gravity and is absorbed by the liquid absorbing strip 3, so that the serious corrosion caused by accumulation of the electrolyte above the shell of the single battery 1 is avoided, and the drainage structure has small occupied space and compact structure.

The embodiment further provides an implementation manner, the battery electrolyte drainage structure further includes a first heat conduction layer 4 and a second heat conduction layer 5, one side of the first heat conduction layer 4 abuts against the convex arc surface of the first arc surface portion 21, and the other side of the first heat conduction layer 4 abuts against the outer wall of one single battery; one side of the second heat conduction layer 4 abuts against the convex arc surface of the second arc surface part 22, and the other side of the second heat conduction layer 22 abuts against the outer wall of the other single battery 1.

The first heat conduction layer 4 or/and the second heat conduction layer 5 is a copper plate with the thickness of 0.3 mm-0.8 mm.

Or, the first heat conduction layer 4 or/and the second heat conduction layer 5 is 0.5mm ~ 1.0 mm's aluminum plate for thickness, promptly the first heat conduction layer 4 the second heat conduction layer 5 can adopt the copper also can adopt aluminum plate, because a plurality of battery cells 1 encapsulation in a seal structure, at least one side edge of first heat conduction layer 4, second heat conduction layer 5 need extend to the seal structure outside to be convenient for lead out the outside of packaging structure in the packaging structure.

Drainage layer 2 is the elastic material, concrete aerogel that can adopt, organosilicon or macromolecular material de nai long, drainage layer 2 also can play thermal-insulated effect this moment, thereby reduce the heat conduction rate between adjacent battery cell 1, and have elastic drainage layer 2 and can compensate the volume that increases after battery cell 1 inflation, avoid adjacent battery cell 1 to be broken by the crowded, and simultaneously, the drainage layer 2 of wave structure can avoid battery cell 1 inflation back, the space between adjacent battery cell 1 is totally blocked up and dies, thereby guaranteed that battery cell 1 after the inflation also can have better water conservancy diversion gap.

This embodiment also provides an implementation mode, the battery electrolyte drainage structure further comprises a first thermal insulation layer 6, the first heat-insulating layer 6 is arranged between the opposite surfaces of the first heat-conducting layer 4 and the current-guiding layer 2, the battery electrolyte drainage structure further comprises a second heat insulation layer 7, wherein the second heat insulation layer 7 is arranged between the second heat conduction layer 4 and the opposite surface of the drainage layer 2, the first heat-insulating layer 6 and the first heat-conducting layer 4 are tightly bonded by adopting a high-temperature-resistant and corrosion-resistant adhesive, the second heat-insulating layer 7 and the second heat-conducting layer 5 are also tightly bonded by adopting a high-temperature-resistant and corrosion-resistant adhesive, the structure separates the current-guiding layer 2 from the first heat-conducting layer 4 and the second heat-conducting layer 5, and further reduces the heat conduction rate between the adjacent single batteries 1.

The working principle is as follows: the battery electrolyte drainage structure is clamped between two adjacent single batteries, when the side wall of the single battery 1 is damaged, leaked electrolyte can downwards flow onto the liquid absorbing strip 3 from the concave arc surface of the first arc surface part 21 or the concave arc surface of the second arc surface part 22 and is absorbed by the liquid absorbing strip 3, and the electrolyte sprayed from the battery safety valve 1a can also downwards flow onto the liquid absorbing strip 3 from the concave arc surface of the first arc surface part 21 or the concave arc surface of the second arc surface part 22 under the action of gravity and is absorbed by the liquid absorbing strip 3, so that the serious corrosion condition caused by accumulation of the electrolyte above the shell of the single battery 1 is avoided, the drainage structure occupies a small space and is compact, and the drainage layer 2 with the wave-shaped structure can avoid that the space between the adjacent single batteries 1 is completely blocked after the single batteries 1 expand, thereby ensuring that the expanded single battery 1 can have better flow guide gaps.

The above description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A battery electrolyte drainage structure is clamped between two adjacent single batteries and is characterized by comprising a drainage layer and a liquid absorption strip, wherein the drainage layer comprises a first arc surface part and a second arc surface part, the first arc surface part and the second arc surface part are respectively provided with a plurality of parts, the axes of the first arc surface part and the second arc surface part are vertically arranged, the adjacent sides of the two adjacent first arc surface parts are respectively and smoothly connected with the two sides of the same second arc surface part, the convex arc surface of the first arc surface part is abutted against the outer wall of one single battery, and the convex arc surface of the second arc surface part is abutted against the outer wall of the other single battery; the liquid absorbing strip is arranged at the lower end of the drainage layer.

2. The battery electrolyte drainage structure of claim 1, further comprising a first heat conduction layer and a second heat conduction layer, wherein one side of the first heat conduction layer abuts against the convex cambered surface of the first cambered surface portion, and the other side of the first heat conduction layer abuts against the outer wall of the single battery; one side of the second heat conduction layer is abutted against the convex cambered surface of the second cambered surface part, and the other side of the second heat conduction layer is abutted against the outer wall of the other single battery.

3. The battery electrolyte drainage structure of claim 2, wherein the first thermally conductive layer or/and the second thermally conductive layer is a copper plate having a thickness of 0.3mm to 0.8 mm.

4. The battery electrolyte drainage structure of claim 2, wherein the first thermally conductive layer or/and the second thermally conductive layer is an aluminum plate having a thickness of 0.5mm to 1.0 mm.

5. The battery electrolyte drainage structure of claim 1, wherein the drainage layer is an elastic material.

6. The battery electrolyte drainage structure of claim 2 further comprising a first thermally insulating layer disposed between opposing faces of the first thermally conductive layer and the drainage layer.

7. The battery electrolyte drainage structure of claim 2 further comprising a second thermally insulating layer disposed between opposing faces of the second thermally conductive layer and the drainage layer.