CN203950860U

CN203950860U - Flexible-packed battery

Info

Publication number: CN203950860U
Application number: CN201420375565.3U
Authority: CN
Inventors: 曾志亮; 杨帆; 姜玲燕; 陈杰
Original assignee: Dongguan Amperex Technology Ltd
Current assignee: Dongguan Amperex Technology Ltd
Priority date: 2014-07-08
Filing date: 2014-07-08
Publication date: 2014-11-19
Anticipated expiration: 2024-07-08

Abstract

The utility model provides a kind of flexible-packed battery, and it comprises: battery core; Electrolyte; Packaging bag, packaging electric core also holds electrolyte so that electrolyte infiltrates battery core.Packaging bag comprises: bottom; Top and two sidepieces, each sidepiece is between bottom and top and connect bottom and top, and to surround together the space that holds battery core, and two sidepieces and top and bottom are packaged together at rear and front end place; Wherein, folding being folded in when battery core flatulence expands of forming and form of at least one in bottom, top, two sidepieces launched.When flexible-packed battery is in the time that high temperature is abused, battery core is inner can produce gas, cause thus flexible-packed battery flatulence to expand, and the folded part of the packaging bag of flexible-packed battery of the present utility model in the time that battery core flatulence expands due to inside increase gas launch rapidly, increase the area of dissipation of battery core, prevent that battery core from causing blast on fire because accumulation of heat too much occurs that temperature rise is too high, thereby improve the fail safe of flexible-packed battery.

Description

Flexible-packed battery

Technical field

The utility model relates to energy storage device field, relates in particular to a kind of flexible-packed battery.

Background technology

Along with the development of consumer electronics product, people are more and more higher to the capacity requirement of battery, and this series products has high power capacity and high-tension feature, and along with the increase of battery core capacity, battery core also will be increasing in the hidden danger of secure context.

Battery is overcharging under condition, reach after certain voltage, inside battery electrolyte can occur to decompose and oxidation reaction, produce a large amount of heat, if heat does not obtain loss timely, heat can be accumulated, temperature can sharply raise, after heat is accumulated to a certain degree, just there will be the safety problems such as on fire from explosion, in being overcharged to test process, battery finds, when battery charging capacity exceedes after 160%SOC, inside battery will produce gas, battery starts to expand, temperature starts sharply to rise, final generation blast on fire, there is equally such problem in high-temperature baking, battery is in the time of high-temperature baking, cell active materials can react with electrolyte, produce gas and heat, in the time that the heat producing cannot be discharged in time, heat will add up, temperature will raise, in the time reaching certain critical point, battery just there will be the safety problems such as explosive combustion, the battery of producing at present also exists greater probability can not pass through these tests.Find with experiment by analysis, battery is about 110 DEG C of left and right (battery surface temperature) overcharging safe temperature in process, battery temperature is comparatively safe in 110 DEG C, but in the time that temperature exceedes 110 DEG C, can there is vigorous reaction in inside battery electrolyte and negative electrode, there is thermal runaway phenomenon, thereby set off an explosion the peril that waits on fire, in over-charging of battery process, its caloric value and heat production speed are by battery core capacity, overcharging size of current determines, in high-temperature baking process, caloric value is determined by battery capacity size equally, heat dissipation capacity is by battery core surface area, battery core and the outside temperature difference, and the heat emissivity coefficient of battery core material is relevant.

Utility model content

In view of the problem existing in background technology, the purpose of this utility model is to provide a kind of flexible-packed battery, and it can improve the fail safe of flexible-packed battery.

To achieve these goals, the utility model provides a kind of flexible-packed battery, and it comprises: battery core; Electrolyte; And packaging bag, packaging electric core also holds electrolyte so that electrolyte infiltrates battery core.Packaging bag comprises: bottom; Top; And two sidepieces, each sidepiece is between bottom and top and connect bottom and top, and to surround together the space that holds battery core, and two sidepieces and top and bottom are packaged together at rear and front end place; Wherein, folding being folded in when battery core flatulence expands of forming and form of at least one in bottom, top, two sidepieces launched.The beneficial effects of the utility model are as follows:

For example, when flexible-packed battery is when high temperature abuse (overcharge with high-temperature baking process etc.), battery core is inner can produce gas, cause thus flexible-packed battery flatulence to expand, and the folded part of the packaging bag of flexible-packed battery of the present utility model in the time that battery core flatulence expands due to inside increase gas launch rapidly, increase the area of dissipation of battery core, prevent that battery core from causing blast on fire because accumulation of heat too much occurs that temperature rise is too high, thereby improve the fail safe of flexible-packed battery.

Brief description of the drawings

Fig. 1 is the stereogram that forms previous packaging film according to the packaging bag of flexible-packed battery of the present utility model;

Fig. 2 is according to the stereogram of the bottom of the packaging bag of flexible-packed battery of the present utility model and sidepiece;

Fig. 3 is according to the stereogram after an embodiment side seal of the packaging bag of flexible-packed battery of the present utility model, wherein, and not shown battery core;

Fig. 4 is according to the stereogram after an embodiment side seal of the packaging bag of flexible-packed battery of the present utility model, wherein, and not shown battery core;

Fig. 5 is according to the stereogram after an embodiment side seal of the packaging bag of flexible-packed battery of the present utility model, wherein, and not shown battery core;

Fig. 6 is the stereogram after the packaging bag side seal of Fig. 3, wherein, battery core is shown;

Fig. 7 is that the packaging bag of Fig. 3 seals battery core stereogram afterwards completely;

Fig. 8 is an alternate embodiment of Fig. 3;

Fig. 9 is another alternate embodiment of Fig. 3;

Figure 10 is an alternate embodiment again of Fig. 3;

Figure 11 is an alternate embodiment of Figure 10.

Wherein, description of reference numerals is as follows:

F packaging film 221 tops

1 battery core 222 bottoms

2 packaging bag 23 tops

21 S side seal place, bottoms

22 sidepiece R sealings place

Embodiment

Describe in detail with reference to the accompanying drawings according to flexible-packed battery of the present utility model.

First explanation be the packaging bag 2 of flexible-packed battery of the present utility model by packaging film F (with reference to Fig. 1) through being processed to form.

With reference to Fig. 2 to Figure 11, comprise according to flexible-packed battery of the present utility model: battery core 1; Electrolyte (not shown); And packaging bag 2, packaging electric core 1 also holds electrolyte so that electrolyte infiltrates battery core 1.Packaging bag 2 comprises: bottom 21; Top 23; And two sidepieces 22, each sidepiece 22 is between bottom 21 and top 23 and connect bottom 21 and top 23, to surround together the space that holds battery core 1, and (fore-and-aft direction of Fig. 1 to Figure 11) is packaged together at rear and front end place two sidepieces 22 and top 23 and bottom 21; Wherein, folding being folded in when battery core 1 flatulence expands of forming and form of at least one in bottom 21, top 23, two sidepieces 22 (being to be to be to be bottom 21, two sidepieces 22 and tops 23 in two sidepieces 22 and top 23, Fig. 9 in two sidepieces 22, Fig. 8 in a sidepiece 22, Fig. 3 to Fig. 7 in Figure 10 and Figure 11) launched.

In the example shown in Fig. 7, (on packaging bag 2 side seals (S carries out at side seal place) of Fig. 7 in Fig. 3 basis afterwards, carry out remaining sealing), show and be positioned at the top 23 of front end and the sealing place R of bottom 21 and two sidepieces 22, what can imagine is, also there is corresponding but unshowned sealing place R in the rear end relative with front end, the space sealing that top 23 surrounds together with two sidepieces 22 with bottom 21 thus.Wherein, encapsulation can adopt hot pressing mode to carry out.

For example, when flexible-packed battery is when high temperature abuse (overcharge with high-temperature baking process etc.), battery core 1 is inner can produce gas, cause thus flexible-packed battery flatulence to expand, and the gas that the folded part of the packaging bag 2 of flexible-packed battery of the present utility model increases due to inside in the time that battery core 1 flatulence expands launches rapidly, increase the area of dissipation of battery core 1, prevent that battery core 1 from causing blast on fire because accumulation of heat too much occurs that temperature rise is too high, thereby improve the fail safe of flexible-packed battery.

According in an embodiment of flexible-packed battery of the present utility model, referring to figs. 1 through Fig. 3, Fig. 6, Fig. 7, Figure 10 and Figure 11, top 23 is from the 22 along continuous straight runs extensions of a sidepiece and be sealed connected together (being sealed connected together at the S of side seal place) with the top 221 of another sidepiece 22.

According in an embodiment of flexible-packed battery of the present utility model, with reference to Figure 10, a sidepiece 22 vertically extends folding forming in a side from bottom 21.

According in an embodiment of flexible-packed battery of the present utility model, with reference to Fig. 2 to Fig. 9, two sidepieces 22 are vertically extending folding forming on both sides relatively from bottom 21.

According in an embodiment of flexible-packed battery of the present utility model, with reference to Fig. 4, the outside of another sidepiece 22 is extended and bent and be folded in top 23 from a sidepiece 22 along continuous straight runs, and be sealed connected together (being sealed connected together at the S of side seal place) with 222 compartment of terrains, bottom of described another sidepiece 22.It should be noted that at this, while being sealed connected together in compartment of terrain, the distance at interval need to ensure that the folded part of sidepiece 22 makes the area of dissipation of battery core 1 according to required increase upon deployment, specifically determines according to actual conditions.

According in an embodiment of flexible-packed battery of the present utility model, with reference to Fig. 5, top 23 forms (being formed by a slice packaging film F respectively) with sidepiece 22 splits, and top 23 is sealed connected together (being sealed connected together at the S of side seal place) in 222 compartment of terrains, bottom of outside and two sidepieces 22 respectively.It should be noted that at this, while being sealed connected together in compartment of terrain, the distance at interval need to ensure that the folded part of sidepiece 22 makes the area of dissipation of battery core 1 according to required increase upon deployment, specifically determines according to actual conditions.

According in an embodiment of flexible-packed battery of the present utility model, with reference to Fig. 8 and Fig. 9, folding forming extended from a sidepiece 22 along continuous straight runs in the top 23 of packaging bag 2.

According in an embodiment of flexible-packed battery of the present utility model, with reference to Fig. 9, folding forming extended from a sidepiece 22 along continuous straight runs in the bottom 21 of packaging bag 2.

According in an embodiment of flexible-packed battery of the present utility model, with reference to Fig. 2 to Figure 10, folding can be all of described formation folds.

According in an embodiment of flexible-packed battery of the present utility model, with reference to Figure 11, it is partially folded that described formation folding can be.

According in an embodiment of flexible-packed battery of the present utility model, described in be sealed connected together into hot pressing together.

Claims

1. a flexible-packed battery, comprising:

Battery core (1);

Electrolyte; And

Packaging bag (2), packaging electric core (1) also holds electrolyte so that electrolyte infiltrates battery core (1);

It is characterized in that, packaging bag (2) comprising:

Bottom (21); Top (23); And two sidepieces (22), each sidepiece (22) is positioned between bottom (21) and top (23) and connects bottom (21) and top (23), to surround together the space that holds battery core (1), and two sidepieces (22) are packaged together at rear and front end place with top (23) and bottom (21);

Wherein, folding being folded in when battery core (1) flatulence expands of forming and form of at least one in bottom (21), top (23), two sidepieces (22) launched.

2. flexible-packed battery according to claim 1, is characterized in that, a sidepiece (22) vertically extends folding forming in a side from bottom (21).

3. flexible-packed battery according to claim 1, is characterized in that, two sidepieces (22) are vertically extending folding forming on both sides relatively from bottom (21).

4. according to the flexible-packed battery described in claim 2 or 3, it is characterized in that, top (23) extend and are sealed connected together with the top (221) of another sidepiece (22) from a sidepiece (22) along continuous straight runs.

5. according to the flexible-packed battery described in claim 2 or 3, it is characterized in that, the outside of another sidepiece (22) is extended and is bent and be folded at top (23) from a sidepiece (22) along continuous straight runs, and is sealed connected together with the compartment of terrain, bottom (222) of described another sidepiece (22).

6. according to the flexible-packed battery described in claim 2 or 3, it is characterized in that, top (23) forms with sidepiece (22) split, and top (23) are sealed connected together in the compartment of terrain, bottom (222) of outside and two sidepieces (22) respectively.

7. flexible-packed battery according to claim 1, is characterized in that, folding forming extended from a sidepiece (22) along continuous straight runs in the top (23) of packaging bag (2).

8. flexible-packed battery according to claim 1, is characterized in that, folding forming extended from a sidepiece (22) along continuous straight runs in the bottom (21) of packaging bag (2).

9. flexible-packed battery according to claim 1, is characterized in that, being folded into of described formation is all folding.

10. flexible-packed battery according to claim 1, is characterized in that, being folded into of described formation is partially folded.