CN209232834U

CN209232834U - Battery case and battery

Info

Publication number: CN209232834U
Application number: CN201821880747.0U
Authority: CN
Inventors: 林梓泉
Original assignee: Dongguan Chuangming Battery Technology Co Ltd
Current assignee: Dongguan Chuangming Battery Technology Co Ltd
Priority date: 2018-11-14
Filing date: 2018-11-14
Publication date: 2019-08-09
Anticipated expiration: 2028-11-14

Abstract

The utility model relates to battery technology fields, a kind of battery case and battery are provided, battery case, including bottom cover, body and top cover, body includes the shell being installed on the bottom cover and the inner casing in the shell, there is gap between inner casing and shell, flame retardant is filled between shell and inner casing, ruptures and discharge the explosion portion of the flame retardant when having on inner casing 22 for the inner casing medial expansion.When battery such as is collided, impacts at the larger external force, drastic mechanical deformation occurs for body inner casing stress, and the explosion portion of inner casing splits, and the release of body interlayer flame retardant is effectively prevented battery catches fire explosion.

Description

Battery case and battery

Technical field

The utility model belongs to cell manufacturing techniques field, is to be related to a kind of battery case and battery more specifically.

Background technique

With the rapid development of electronic product, battery mobile communication apparatus, portable electronic device, electric tool, The Large Electrics apparatus field such as electric bicycle, electric car is widely used.However, the safety problem of battery is always It is restrict further to develop.Because existing battery case can only guarantee the knot of battery case as single layer solid slab structure Structure intensity, once battery collides, impacts etc., external force cause body to rupture, and it is on fire to have positive and negative anodes short circuit heat production for battery at this time Risk of explosion.

Utility model content

The purpose of this utility model is to provide a kind of battery cases, it is intended to solve battery in the prior art and touch because of external force The problem of of causing body to rupture and then cause battery explosion such as hit, impact.

A kind of in order to achieve the above purposes, the technical solution adopted by the utility model is: battery case, including bottom cover and institute It states bottom cover and is encircled into a top end opening and the body of inner hollow and the top cover being placed on the body, which is characterized in that is described Body includes the shell being installed on the bottom cover and the inner casing in the shell, the inner casing and the shell it Between there is gap, the flame retardant with flame-retarding characteristic is loaded between the shell and the inner casing, is had on the inner casing interior in this The explosion portion of the flame retardant is ruptured and discharged when shell medial expansion.

Further, the explosion portion is the explosion indentation on the inner housing surface.

Further, the cross section of the explosion indentation is arc-shaped.

Further, two surfaces of the inner casing are equipped with the explosion indentation.

Further, the explosion indentation is multiple, and multiple explosion indentations are set along inner casing short transverse distribution It sets.

Further, the whole surface of the inner casing is equipped with multiple explosion indentations, multiple explosion indentation structures At grid or textured.

Further, the explosion portion is several thinner wall sections on the inner casing.

Further, the position on the top cover corresponding to the gap offers the through-hole imported for the flame retardant.

The utility model additionally provides a kind of battery, including battery case as described above.

The beneficial effect of battery provided by the utility model is: compared with prior art, the utility model passes through setting Battery case is filled with flame retardant as double-layer structure between shell and inner casing, and inner casing has for releasing when battery generation short circuit The explosion portion for putting flame retardant, when battery such as is collided, impacts at the larger external force, drastic mechanical deformation occurs for body inner casing stress, interior The explosion portion of shell splits, and the release of body interlayer flame retardant is effectively prevented battery catches fire explosion.

Detailed description of the invention

It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new Some embodiments of type for those of ordinary skill in the art without any creative labor, can be with As these attached drawings obtain other attached drawings.

Fig. 1 is the configuration schematic diagram of battery case provided by the embodiment of the utility model；

Fig. 2 is the vertical section figure of battery body provided by the embodiment of the utility model；

Fig. 3 is battery body deployed configuration schematic diagram provided by the embodiment of the utility model；

Fig. 4 is battery inner casing deployed configuration schematic diagram provided by the embodiment of the utility model；

Wherein, each appended drawing reference in figure:

1- bottom cover；

2- body；21- shell；22- inner casing；23- flame retardant；221- explosion portion；

3- top cover；31- through-hole

Specific embodiment

In order to which technical problem to be solved in the utility model, technical solution and beneficial effect is more clearly understood, with Lower combination accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that specific reality described herein It applies example to be only used to explain the utility model, is not used to limit the utility model.

It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element On one element or indirectly on another element.When an element is known as " being connected to " another element, it can To be directly to another element or be indirectly connected on another element.

In the description of the present invention, it should be understood that term " center ", " length ", " width ", " thickness ", The orientation of the instructions such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" or Positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing the present invention and simplifying the description, Rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, because This should not be understood as limiting the present invention.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention, More than, unless otherwise specifically defined.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements or the interaction relationship of two elements.For those of ordinary skill in the art and Speech, can understand the concrete meaning of above-mentioned term in the present invention as the case may be.

Also referring to Fig. 1 and Fig. 2, now battery provided by the utility model can be illustrated.The battery case Body, including bottom cover 1, body 2 and top cover 3；Bottom cover 1 and body 2 are encircled into the cylinder of a top end opening and inner hollow, top cover 3 It is covered in the opening, forms it into the confined space that can accommodate battery and battery component.

Battery case provided by the utility model, compared with prior art, body 2 include the shell being installed on bottom cover 1 21 and the inner casing 22 in shell 21, wherein there is between shell 21 and inner casing 22 gap, loaded in the gap of inside and outside shell There is the flame retardant 23 with fire retardant characteristics, has on inner casing 22 and discharge flame retardant 23 with rupturing when 22 medial expansion of inner casing Explosion portion 221.When inner casing 22 stress of the battery when the larger external force collision such as falling or being collided, impact, on body Drastic mechanical deformation can occur, the explosion portion 221 of inner casing 22, which can expand, splits, and discharges in the flame retardant 23 of body interlayer, thus effectively Ground prevents battery catches fire from exploding.

Specifically, body 2 is the main guard block of the battery, while also determining the shape of battery, which uses Metal material with certain degree of hardness is made, such as aluminium, steel perhaps aluminum alloy materials or plastics etc..Wherein shell 21 Can be the plate of consistency of thickness with inner casing 22, or shell 21 be the biggish plate of thickness, inner casing 22 be thickness compared with Small plate.The steel of inside and outside shell consistency of thickness are selected in the present embodiment, and certainly, in another embodiment, inner casing 22 can be adopted With the plate of the thin two sides thickness in middle part.Preferably, one layer of thermal insulation layer can also be added between shell 21 and inner casing 22.

Explosion portion 221 is the explosion indentation that 22 surface of inner casing is arranged in, the cross section for the indentation that bursts be it is arc-shaped, wherein preventing The shape of explosion trace is also possible to rectangle, circle or irregular shape, and the shape for the indentation that bursts herein can be unrestricted.

Further, referring to Fig. 3, two surfaces of inner casing 22 are equipped with explosion indentation, and the indentation that bursts is surrounded on inner casing On 22.Preferably, the explosion indentation on two surfaces is located in same horizontal line, so that the wall thickness with explosion-proof slight crack can be much smaller than There is no the wall thickness of explosion-proof slight crack, when deformation occurs for battery case stress, the position equipped with explosion-proof slight crack can expand first and split The flame retardant 23 of release jacket coating effectively prevent battery to occur burning or explosion accident.

Further, burst indentation quantity it is unlimited.Fig. 2 and Fig. 3 are please referred to, in one embodiment, burst indentation Quantity be it is multiple, multiple explosion indentations along 22 short transverse of inner casing distribution setting.

In another embodiment, the quantity of indentation of bursting is multiple, the latticed or textured of multiple explosion indentations composition, and The preferably grid or decorative pattern of explosion indentation even density, or explosion indentation density are larger at 22 middle part of inner casing, and edge is smaller Grid or decorative pattern.

Further, Fig. 3 and Fig. 4 are please referred to, explosion portion 221 is the thinner wall section on inner casing 22, then when battery is because hitting It hits, fall or when the larger external force collisions such as other factors, drastic change can occur for battery case stress, and thinner wall section takes the lead in shrinking It causes to rupture, and then discharges flame retardant 23.

Further, please refer to figs. 2 and 3, flame retardant 23 can be solid powder fire retardant or for include it is fire-retardant The microencapsulation of agent.Wherein fire retardant includes organic fire-retardant, inorganic fire retardants or inorganic fire retardants and organic fire-retardant mixing The mixing fire retardant of formation, in this example using liquid flame retardant.When battery is by larger external force collision, battery case Drastic change can occur for stress, and explosion portion 221, which takes the lead in shrinking, to cause to rupture, and then discharge liquid flame retardant, and liquid flame retardant exists It is directly and quickly permeated under the action of gravity on battery body, so that battery be effectively prevent to occur burning or explosion accident.

Further, referring to Fig. 1, the interstitial site corresponded between shell 21 and inner casing 22 on top cover 3 is additionally provided with for resistance The through-hole 31 that combustion things 23 import.Preferably, the stream that inside and outside shell gap is flowed into for liquid flame retardant is additionally provided under the through-hole 31 of bottom cover 3 Road (unmarked in figure).

The utility model additionally provides a kind of battery, and the battery includes battery as described above referring to FIG. 1 to FIG. 4, Shell.The battery of the utility model has used above-mentioned battery case, when battery is because by larger external force collision or impact, electricity The explosion-proof portion 221 of pond inner casing 22 deformation retract can split first since wall thickness is relatively thin, discharge the flame retardant 23 of battery case interlayer, Avoid the explosion caused due to battery short circuit.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model Protection scope within.

Claims

1. a kind of battery case is encircled into the body of a top end opening and inner hollow including bottom cover, with the bottom cover and is placed on Top cover on the body, which is characterized in that the body includes the shell being installed on the bottom cover and is set to described outer Inner casing in shell has gap between the inner casing and the shell, loading between the shell and the inner casing has fire-retardant spy Property flame retardant, rupture when having for the inner casing medial expansion on the inner casing and the explosion portion for discharging the flame retardant.

2. battery case as described in claim 1, which is characterized in that the explosion portion is quick-fried on the inner housing surface Split indentation.

3. battery case as claimed in claim 2, which is characterized in that the cross section of the explosion indentation is arc-shaped.

4. battery case as claimed in claim 2, which is characterized in that two surfaces of the inner casing are equipped with the explosion and carve Trace.

5. such as the described in any item battery cases of claim 2-4, which is characterized in that the explosion indentation is around the inner casing.

6. battery case as claimed in claim 5, which is characterized in that the explosion indentation is multiple, multiple explosions quarters Trace is distributed along the inner casing short transverse to be arranged.

7. such as the described in any item battery cases of claim 2-4, which is characterized in that the whole surface of the inner casing is equipped with more A explosion indentation, multiple explosion indentations constitute grid or textured.

8. battery case as described in claim 1, which is characterized in that the explosion portion is several thin on the inner casing Wall portion.

9. battery case as described in claim 1, which is characterized in that the position on the top cover corresponding to the gap opens up There is the through-hole imported for the flame retardant.

10. a kind of battery, which is characterized in that including such as described in any item battery cases of claim 1-9.