CN218548732U - Electrodeless ear soft-package battery with internal string structure and isolation assembly - Google Patents

Abstract

The application discloses a battery, which comprises n electric cores and n-1 isolating components, wherein the electric cores and the n-1 isolating components are arranged in a laminated mode, n is more than or equal to 2, every two electric cores are arranged at intervals through one isolating component, each isolating component comprises a conducting layer and a non-conducting layer, and a groove is formed in the non-conducting layer; and the hollow foil areas extending from the positive electrode end and the negative electrode end are respectively and electrically connected with the conductive layer on the isolation assembly through the grooves. The battery provided by the application uses the isolation assembly to electrically connect the positive electrode and the negative electrode of the two battery cells, and each battery cell is in a relatively independent environment, so that the series connection inside the battery is realized, the output voltage of the battery is improved, the problem of electrolyte decomposition caused by high voltage due to direct series connection of the battery is prevented, and the safety and reliability of the battery are ensured. The improvement of the output voltage can reduce the grouping number of the batteries, and improve the grouping reliability.

Description

Electrodeless ear soft-package battery with internal string structure and isolation assembly

Technical Field

The application relates to the field of lithium ion batteries, in particular to an electrodeless ear soft-package battery with an inner series structure and an isolation assembly.

Background

The rapid development of lithium ion batteries is promoted by the current reasons of global ecological environment destruction, energy shortage, new energy policy development of all countries in the world and the like. The lithium ion battery has excellent electrochemical properties such as high power density, high working voltage, long service life and the like, so that the lithium ion battery is widely applied to the fields of information technology, electric automobiles, hybrid electric automobiles, aerospace and the like.

With the rapid development of the electric automobile industry, the demand of lithium ion batteries continues to increase substantially as a power source. And the power density and the energy density are improved, and simultaneously, higher requirements are put forward on the safety of the power lithium ion battery. The electrode lug structure does not need to be led out from the electrode core with the electrode lug structure, and two large faces of the battery are used as the positive and negative levels of the battery, so that the space utilization rate of the battery is improved, and the grouping convenience, the grouping efficiency, the grouping reliability and the energy density of the battery are improved.

The patent CN206758546U discloses an ultra-thin soft-packaged cell without electrode tab, which adopts a form of providing a notch on a conventional aluminum-plastic film to achieve the purpose of electric conduction between the cell and the outer layer aluminum-plastic film, and requires welding an external electrode tab to extend to the outside of the battery. However, because the three-layer structure of the aluminum-plastic film structure is compact and has small thickness, the thickness is generally about 100 μm, and the removal of the upper layer and the lower layer on the structure of the existing aluminum-plastic film is difficult to realize; the thickness of the aluminum-plastic film for removing the protective layer and the heat sealing layer is only about 35 mu m, and the welding is difficult; the anode and the cathode are made of aluminum, so that electrochemical corrosion is caused, and the safety problem is easy to occur. Therefore, it is necessary to provide a high-safety electrodeless ear soft-package battery which has a simple structure and is easy to produce in mass.

SUMMERY OF THE UTILITY MODEL

In view of this, the present application provides a high-safety electrodeless ear soft-pack battery, which can improve the convenience of battery grouping, the efficiency of battery grouping, and the reliability of battery grouping while reducing the risk of thermal runaway caused by short circuit in the battery.

The application provides a battery, which comprises n battery cores and n-1 isolating components which are arranged in a laminated manner, wherein n is more than or equal to 2, every two battery cores are arranged at intervals through one isolating component,

the isolation component includes a conductive layer that is,

a non-conductive layer laminated on the upper surface of the conductive layer, wherein the non-conductive layer is provided with a first groove capable of exposing the conductive layer;

the non-conductive layer is laminated on the lower surface of the conductive layer, and a second groove capable of exposing the conductive layer is formed in the non-conductive layer;

the conductive layer and the non-conductive layer are heat-sealed by a glue layer to be bonded,

the battery cells are respectively provided with a positive end and a negative end, the positive end of one battery cell is opposite to the negative end of the other battery cell in the two battery cells which are arranged at intervals through the isolation assembly, and the hollow foil regions extending from the positive end and the negative end are bent and then are respectively electrically connected with the conducting layers on the isolation assembly through the grooves;

and the positive electrode packaging film and the negative electrode packaging film wrap the battery cell, and the edges of the positive electrode packaging film, the negative electrode packaging film and the isolation assembly are sealed.

In a specific embodiment, the positive electrode sealing film and the negative electrode sealing film comprise a conductive layer and a non-conductive layer, the conductive layer and the non-conductive layer are bonded by heat sealing through a glue layer, the non-conductive layer is laminated on the conductive layer of the positive electrode sealing film and the negative electrode sealing film, the non-conductive layer is provided with a groove capable of exposing the conductive layer,

bending a hollow foil area extending from the positive end of the cell closest to the positive electrode packaging film in the n cells, and electrically connecting the hollow foil area with the conductive layer of the positive electrode packaging film through a groove in the battery;

and the hollow foil region extending from the negative end of the cell closest to the negative encapsulation film in the n cells is bent and then is electrically connected with the conductive layer of the negative encapsulation film in the battery through the groove.

In a specific embodiment, the electrical connection is a direct contact or a soldering, or by bonding to a conductive glue or a conductive tape.

In a specific embodiment, the conductive layer of the positive electrode packaging film or the negative electrode packaging film is located on a side far away from the battery cell, and the non-conductive layer is located on a side close to the battery cell.

In a specific embodiment, the glue layer is MPP.

In a specific embodiment, the length of the groove is 20% to 40% of the length of the battery cell.

In a specific embodiment, the width of the positive terminal or the negative terminal is 35% to 63% of the width of the battery cell.

In a specific embodiment, the thickness of the non-conductive layer is 0.03mm to 0.10mm; or,

the thickness of the glue layer between the conducting layer and the non-conducting layer is 0.003mm-0.015mm; or,

the thickness of the conducting layer of the anode packaging film and the conducting layer of the cathode packaging film is 0.01mm-0.07 mm.

A particular embodiment is characterized in that the electrically conductive layer of the insulation assembly is a steel foil or an aluminium-plated copper layer, preferably a steel foil; or

The non-conductive layer of the isolation assembly is a PP or PET layer; or

The glue layer of the isolation assembly is MPP.

A particular embodiment is characterized in that the thickness of the non-conductive layer of the insulation assembly is between 0.03mm and 0.10mm; or,

the thickness of the glue layer of the isolation assembly is 0.003mm-0.015mm; or,

the thickness of the conducting layer of the isolation component is 0.01mm-0.07mm; or,

the length of the groove of the isolation component is 20% -40% of the length of the conducting layer.

Drawings

The drawings are included to provide a further understanding of the application and are not to be construed as limiting the application. Wherein:

FIG. 1 is a schematic cross-sectional view of an isolation assembly.

Fig. 2 is a schematic view of a cross-sectional structure of a tab-free soft package battery with a serial structure in two battery cells.

Fig. 3 is a schematic structural diagram of the positive plate.

Fig. 4 is a schematic view of the structure of the negative plate.

Fig. 5 is a schematic structural diagram of a cross section of a cell structure.

Fig. 6 is a schematic cross-sectional structure diagram of the positive electrode encapsulation film.

Fig. 7 is a schematic cross-sectional structure view of the negative electrode encapsulation film.

Fig. 8 is a schematic view of a cross-sectional structure of a tab-free soft package battery with a serial structure in three battery cells.

List of reference numerals

1. A first cell; 2. a second cell; 3. a positive electrode encapsulation film; 4. a negative electrode encapsulating film; 5. an isolation component; 11. a positive plate; 12. a negative plate; 13. a diaphragm; 21. a positive plate; 22. a negative plate; 23. a diaphragm; 31. a first conductive layer; 32. a first glue layer; 33. a first non-conductive layer; 34. a first groove; 41. a second conductive layer; 42. a second glue layer; 43. a second non-conductive layer; 44. a second groove; 51. a third non-conductive layer; 52. a third glue layer; 53. a third conductive layer; 54. a fourth glue layer; 55. a fourth non-conductive layer; 56. a third groove; 57. a fourth groove; 111. an anode uncoated region; 112. a positive electrode coating region; 121. a negative uncoated region; 122. a negative electrode coating region; 6. and a third battery cell.

Detailed Description

The following description of the exemplary embodiments of the present application, taken in conjunction with the accompanying drawings, includes various details of the embodiments of the application to assist in understanding, which are to be considered exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present application. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

The application provides a battery isolation assembly, it can be used to carry out the isolation between the pole piece in the battery, be particularly useful for the isolation between the pole piece in the anodeless ear soft package battery, as shown in figure 1, including the third nonconducting layer 51, the fourth nonconducting layer 55, third conducting layer 53, third glue layer 52, the fourth glue layer 54 that laminate in proper order, third glue layer 52 is located between third nonconducting layer 51 and the third conducting layer 53, fourth glue layer 54 is located between fourth nonconducting layer 55 and the third conducting layer 53, the glue layer is used for conducting layer and nonconducting layer heat-seal in order to bond, is equipped with recess 56 on the third nonconducting layer, and the fourth nonconducting layer is equipped with recess 57.

The material of the conductive layer can be any conductive material used in the battery in the art, and in a preferred embodiment, the material of the conductive layer is a steel foil or an aluminum-plated copper layer, and the aluminum-plated copper layer is aluminum plated with a copper layer. In a further preferred embodiment, the conductive layer is a steel foil; in a further preferred embodiment, the conductive layer is aluminum plated copper.

The material of the non-conductive layer can be any non-conductive material used in the battery in the art, and in a preferred embodiment, the material of the non-conductive layer is PP (polypropylene) or PET (polyethylene terephthalate).

The glue layer may be any material known in the art that is capable of bonding the conductive and non-conductive layers together, and in a preferred embodiment, the glue layer is MPP (metallized polypropylene).

The thickness of the non-conductive layer is not affected so long as it can be used in a battery, and in a preferred embodiment, the thickness of the non-conductive layer is 0.03mm to 0.10mm, and may be, for example, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm.

The thickness of the non-conductive layer is not affected so long as it can be used in a battery, and in a preferred embodiment, the thickness of the non-conductive layer 53 is 0.01mm to 0.07mm, and may be, for example, 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm. The thickness of the glue layer is not affected so long as it can be used in a battery and can bond the above conductive and non-conductive layers together, and in a preferred embodiment the glue layer has a thickness of 0.003mm to 0.015mm, and may be, for example, 0.004mm, 0.005mm, 0.006mm, 0.007mm, 0.008mm, 0.009mm, 0.01mm, 0.011mm, 0.012mm, 0.013mm, 0.014mm.

The length of the groove is not affected as long as the positive electrode end or the negative electrode end of the battery cell can be electrically connected with the conductive layer of the isolation assembly through the groove, in a preferred embodiment, the length of the groove is 20% to 40% of the length of the battery cell, and may be, for example, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, and under the preferred length of the groove, the connection area between the positive electrode end or the negative electrode end of the battery cell and the conductive layer of the encapsulation film is sufficiently large, the electrical transmission efficiency is ensured, and meanwhile, the tab is prevented from being too long to interfere with lamination, so that production and manufacturing are affected.

The application further provides an electrodeless ear soft-package battery, which is an electrodeless ear soft-package battery with a series structure inside and comprises n electric cores and n-1 isolating components, wherein the n is more than or equal to 2, every two electric cores are arranged at intervals through one isolating component, each isolating component comprises a conducting layer, a non-conducting layer is laminated on the upper surface of the conducting layer, and a first groove capable of exposing the conducting layer is formed in the non-conducting layer; the non-conductive layer is laminated on the lower surface of the conductive layer, and a second groove capable of exposing the conductive layer is formed in the non-conductive layer; the conducting layer and the non-conducting layer are bonded by hot sealing through a glue layer, the battery cells are respectively provided with a positive end and a negative end, the positive end of one battery cell in the two battery cells which are arranged at intervals through the isolation assembly is opposite to the negative end of the other battery cell, and the hollow foil regions extending from the positive end and the negative end are respectively and electrically connected with the conducting layer on the isolation assembly through the grooves after being bent; and the positive electrode packaging film and the negative electrode packaging film wrap the battery cell, and the edges of the positive electrode packaging film, the negative electrode packaging film and the isolation assembly are sealed.

In a specific embodiment, the electrodeless ear soft package battery is shown in fig. 2, and includes 2 electric cores, a first electric core 1 and a second electric core 2, and 1 isolating component 5, a positive encapsulating film 3 and a negative encapsulating film 4, which are stacked, wherein the edges of the positive encapsulating film 3, the negative encapsulating film 4 and the isolating component 5 are sealed and wrap the first electric core 1 and the second electric core 2, and the two electric cores are isolated by the isolating component 5. The isolation component 5 is as described in any of the above. The negative terminal of the first cell 1 and the positive terminal of the second cell are opposite and electrically connected through a third groove 56 and a fourth groove 57 on the isolation assembly 5. During packaging, the first battery cell 1 and the second battery cell 2 are separated by the isolation assembly 5 and located in two independent environments, the third conductive layer 53 of the isolation assembly 5 is electrically connected with the empty foil region extending from the positive end of the first battery cell 1, and the third conductive layer 53 of the isolation assembly 5 is electrically connected with the empty foil region extending from the negative end of the second battery cell 2.

The electrical connection may be any one of the methods in the art that can achieve electrical conduction after connection, and in a preferred embodiment, the electrical connection means that the bent portion of the extended hollow foil region is directly contacted or welded with the conductive layer, or the bent portion is adhered to the conductive layer by applying a conductive adhesive or a conductive tape.

The isolation assembly has the function of isolating the two battery cells in two independent environments respectively, allows electronic exchange in the two independent environments, and does not allow ion exchange, so that the problem of electrolyte decomposition caused by high voltage generated by electrolyte is solved.

In a preferred embodiment, the cell comprises at least one positive electrode tab 11. As shown in fig. 3, the positive electrode sheet 11 includes a positive electrode uncoated region 111, a positive electrode coated region 112.

In a preferred embodiment, the cell includes at least one negative electrode tab 12. As shown in fig. 4, the negative electrode sheet 12 includes a negative uncoated region 121, a negative coated region 122, and a foil layer.

In a preferred embodiment, the battery cell comprises a plurality of positive electrode tabs 11 and a plurality of negative electrode tabs 12, and a separator 13 between the positive electrode tabs 11 and the negative electrode tabs 12, as shown in fig. 5.

When the positive plate and the negative plate form a cell, the positive uncoated region 111 forms a positive end of the cell, and the positive end can be an uncoated region of one positive plate or a plurality of uncoated regions of a plurality of positive plates according to the number of the plates; the negative uncoated region 111 forms a negative end of the battery cell, and the negative end may be an uncoated region of one negative plate or may be an integration of a plurality of uncoated regions of a plurality of negative plates according to the number of the pole pieces, where the integration means that the plurality of uncoated regions of the plurality of negative plates are welded together by ultrasonic welding.

The width of the positive terminal or the negative terminal is not affected, and in a further preferred embodiment, the width of the positive terminal or the negative terminal is 35% to 63% of the width of the battery cell, and may be, for example, 40%, 45%, 50%, 55%, 60%.

In a specific embodiment, the positive encapsulating film 3 is shown in fig. 6, and includes three layers of materials, namely a first conductive layer 31, a first non-conductive layer 33, and a first glue layer 32 located between the first non-conductive layer 33 and the first conductive layer 31, and a groove 34 is formed on the first non-conductive layer 33; when the battery core is wrapped, the first conductive layer 31 is located on the outer layer, that is, on the surface of the positive electrode encapsulation film 3 away from the first battery core 1, and the first non-conductive layer 33 is located on the inner layer, that is, on the surface of the positive electrode encapsulation film 3 close to the first battery core; the empty foil area extending from the positive electrode end of the cell closest to the positive electrode packaging film, namely the positive electrode end 111 of the first cell 1, is bent and then is electrically connected with the conductive layer of the positive electrode packaging film, namely the first conductive layer 31, through the groove 34 in the battery, wherein the empty foil area refers to a tab of which the positive electrode end 111 represents one positive electrode sheet and a tab of which the tabs of a plurality of positive electrode sheets are integrated.

In a preferred embodiment, the positive electrode packaging film is formed by heat-sealing the conductive layer and the non-conductive layer of the positive electrode packaging film through a glue layer to form a packaging structure in a bonding manner, and the glue layer can be any glue capable of heat-sealing and bonding the conductive layer and the non-conductive layer together in the field, and is preferably MPP (metallized polypropylene).

In a specific embodiment, the negative electrode encapsulating film 4 is as shown in fig. 7, and includes three layers of materials, namely a second conductive layer 41, a second PP layer 43, and a second glue layer 32 located between the second PP layer 43 and the second conductive layer 41, and a groove 44 is formed on the second PP layer 43; during packaging, the second conductive layer 41 is located at the outer layer, that is, at the surface of the negative electrode packaging film 4 away from the second electric core 2, and the second PP layer 43 is located at the inner layer, that is, at the surface of the negative electrode packaging film 4 close to the second electric core 2; the second conductive layer 41 of the negative end 121 of the cell closest to the negative encapsulation film, i.e. the second cell 2, is electrically connected with the conductive layer of the negative encapsulation film, i.e. the second conductive layer 41, through the groove 44 in the battery, and the negative end 111 represents a tab of one negative plate and also represents a tab of a plurality of negative plates after tab integration.

In a preferred embodiment, the negative electrode packaging film is formed by heat-sealing the conductive layer and the non-conductive layer of the negative electrode packaging film through a glue layer to form a packaging structure in a bonding manner, wherein the glue layer can be any glue in the field capable of heat-sealing and bonding the conductive layer and the non-conductive layer together, and is preferably MPP (metallized polypropylene).

The material of the conductive layer of the positive electrode encapsulating film can be any conductive material used in the battery in the art, and in a preferred embodiment, the conductive layer of the positive electrode encapsulating film is an aluminum foil layer.

The material of the conductive layer of the negative electrode encapsulating film can be any material capable of conducting electricity used in batteries in the field, and in a preferred embodiment, the conductive layer of the negative electrode encapsulating film is a copper foil layer, a nickel foil layer or a steel foil layer.

The material of the non-conductive layer can be any non-conductive material used in the battery in the art, and in a preferred embodiment, the material of the non-conductive layer is PP (polypropylene) or PET (polyethylene terephthalate).

The glue layer may be any material known in the art that is capable of bonding the conductive and non-conductive layers together, and in a preferred embodiment, the glue layer is MPP (metallized polypropylene).

The thickness of the non-conductive layer is not affected as long as it can be used in a battery, and in a preferred embodiment, the thickness of the non-conductive layer is 0.03mm to 0.10mm, and may be, for example, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm.

The thickness of the conductive layer is not affected as long as it can be used in a battery, and in a preferred embodiment, the thickness of the conductive layer is 0.01mm to 0.07mm, and may be, for example, 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm.

The thickness of the glue layer is not affected so long as it can be used in a battery and can bond the above conductive and non-conductive layers together, and in a preferred embodiment, the glue layer has a thickness of 0.003mm to 0.015mm, and may be, for example, 0.004mm, 0.005mm, 0.006mm, 0.007mm, 0.008mm, 0.009mm, 0.01mm, 0.011mm, 0.012mm, 0.013mm, 0.014mm.

In a preferred embodiment, the edge sealing pressure of the positive electrode sealing film and the negative electrode sealing film is 0.2 to 1.0MPa, for example, 0.2MPa, 0.3MPa, 0.4MPa, 0.5MPa, 0.6MPa, 0.7MPa, 0.8MPa, 0.9MPa, for 2 to 6s, for example, 3s, 4s, 5s, and the temperature is 170 to 210 ℃. For example, 175 ℃, 180 ℃, 185 ℃, 190 ℃, 195 ℃, 200 ℃, 205 ℃.

Examples

Embodiment 1 electrodeless ear soft-pack battery with two-cell internal string structure

The inner-string-structure electrodeless ear soft-package battery in the embodiment comprises a battery cell 1, a battery cell 2, a positive electrode packaging film, a negative electrode packaging film and an isolation assembly.

The structure of the battery core 1 and the battery core 2 is the same as that of the used anode material and cathode material, the anode plate coating material is NCM ternary material, the cathode plate coating material is graphite, the anode plate lug and the cathode plate lug are oppositely arranged and are sequentially and alternately stacked together, and the middle of the anode plate coating material and the cathode plate coating material are separated by a diaphragm.

The positive electrode packaging film comprises three layers of materials, namely a conductive layer aluminum foil and a first PP layer of the positive electrode packaging film, and a first glue layer positioned between the conductive layer and the first PP layer of the positive electrode packaging film, wherein the conductive layer of the positive electrode packaging film is 0.4mm, the thickness of the first PP layer is 0.06mm, and the thickness of the first glue layer is 0.009mm.

The negative electrode packaging film comprises three layers of materials, namely a conductive layer copper foil and a second PP layer of the negative electrode packaging film, and a second glue layer positioned between the conductive layer and the second PP layer of the negative electrode packaging film, wherein the conductive layer of the negative electrode packaging film is 0.4mm, the thickness of the second PP layer is 0.06mm, and the thickness of the second glue layer is 0.009mm.

The third conducting layer of this embodiment isolation component is the steel foil, and thickness is 0.03mm, and the thickness of third PP layer and fourth PP layer is 0.06mm, and the thickness of third glue layer and fourth glue layer is 0.009mm.

The battery cell 1 and the battery cell 2 are isolated by the isolation assembly, the positive terminal of the battery cell 1 is electrically connected with the exposed steel foil on one side of the isolation assembly through conductive adhesive, and the negative terminal of the battery cell 2 is electrically connected with the exposed steel foil on the other side of the isolation assembly through conductive adhesive.

When the battery cell is packaged, the conductive layer of the positive electrode packaging film is positioned at the outer side, the first PP layer is positioned at the inner side, the conductive layer of the positive electrode packaging film is electrically connected with the positive electrode end of the battery cell 2 through conductive adhesive, and the positive electrode packaging film is sealed with the edge of the side of the isolation assembly where the battery cell 2 is positioned; the conducting layer of the negative electrode packaging film is located on the outer side, the second PP layer is located on the inner side, the conducting layer of the negative electrode packaging film is electrically connected with the negative electrode end of the battery cell 1 through conducting adhesive, the edges of the sides, where the battery cell 1 of the negative electrode packaging film and the battery cell of the isolation assembly are located, of the battery cell 1 and the battery cell 2 are located in two relatively independent spaces, the edge sealing pressure of the positive electrode packaging film, the edge sealing pressure of the negative electrode packaging film and the edge sealing pressure of the isolation assembly are 0.6MPa, the time is 4s, and the temperature is 190 ℃.

Embodiment 2 electrodeless ear soft-package battery with three-cell internal string structure

The inner-string-structure electrodeless ear soft-package battery in the embodiment comprises three battery cells, namely a battery cell 1, a battery cell 2 and a battery cell 6, as well as a positive electrode packaging film, a negative electrode packaging film and an isolation assembly. As shown in fig. 8.

The battery of this application uses the isolation subassembly to connect the positive negative pole electricity of two electric cores, but makes every electric core all be in relatively independent environment again, realizes establishing ties in the battery is inside, has improved the output voltage of battery, has prevented again that the electrolyte that leads to with the high voltage that the direct series connection of battery arouses from decomposing the problem, has guaranteed the fail safe nature of battery. The improvement of the output voltage can reduce the grouping number of the batteries, and improve the grouping reliability.

The utility model provides an electrodeless ear soft-packet battery further makes the positive terminal of electric core series group be connected with anodal encapsulated film conducting layer electricity inside the battery, and the negative pole end is connected with the conducting layer electricity of negative pole seal form membrane inside the battery, does not draw utmost point ear after the encapsulation, and the battery is whole electrified, saves the shared space of utmost point ear, can further improve the space utilization when in groups.

Although the embodiments of the present application have been described above with reference to the accompanying drawings, the present application is not limited to the above-described embodiments and application fields, and the above-described embodiments are illustrative, instructive, and not restrictive. Those skilled in the art, having the benefit of this disclosure, may effect numerous modifications thereto and changes may be made without departing from the scope of the invention as defined by the appended claims.

Claims (11)

1. A battery is characterized by comprising n battery cores and n-1 isolating components which are arranged in a laminated manner, wherein n is more than or equal to 2, every two battery cores are arranged at intervals through one isolating component,

the isolation component includes a conductive layer that is,

the non-conductive layer is laminated on the upper surface of the conductive layer, and a first groove capable of exposing the conductive layer is formed in the non-conductive layer;

the non-conductive layer is laminated on the lower surface of the conductive layer, and a second groove capable of exposing the conductive layer is formed in the non-conductive layer;

the conductive layer and the non-conductive layer are heat-sealed by a glue layer to be bonded,

the battery cells are respectively provided with a positive end and a negative end, the positive end of one battery cell in the two battery cells arranged at intervals through the isolation assembly is opposite to the negative end of the other battery cell, and the hollow foil areas extending from the positive end and the negative end are bent and then are respectively and electrically connected with the conducting layer on the isolation assembly through the grooves;

and the positive electrode packaging film and the negative electrode packaging film wrap the battery cell, and the edges of the positive electrode packaging film, the negative electrode packaging film and the isolation assembly are sealed.

2. The battery according to claim 1, wherein the positive electrode sealing film and the negative electrode sealing film comprise a conductive layer and a non-conductive layer, the conductive layer and the non-conductive layer are heat-sealed by a glue layer to be bonded, a non-conductive layer is laminated on the conductive layer of the positive electrode sealing film and the negative electrode sealing film, the non-conductive layer has a groove capable of exposing the conductive layer,

bending a hollow foil area extending from the positive end of the cell closest to the positive electrode packaging film in the n cells, and electrically connecting the hollow foil area with the conductive layer of the positive electrode packaging film through a groove in the battery;

and the hollow foil region extending from the negative end of the cell closest to the negative encapsulation film in the n cells is bent and then is electrically connected with the conductive layer of the negative encapsulation film in the battery through the groove.

3. The cell defined in claim 1 or 2, wherein the electrical connection is direct contact or soldering, or bonding by means of an electrically conductive glue or tape.

4. The battery of claim 1 or 2, wherein the conductive layer of the positive electrode packaging film or the negative electrode packaging film is positioned on a side far away from the battery cell, and the non-conductive layer is positioned on a side close to the battery cell.

5. The cell defined in claim 1 or claim 2, wherein the glue layer is MPP.

6. The battery of claim 1 or 2, wherein the length of the groove is 20% to 40% of the length of the cell.

7. The battery of claim 1 or 2, wherein the width of the positive or negative terminal is 35% to 63% of the width of the cell.

8. The battery according to claim 1 or 2, wherein the thickness of the non-conductive layer is 0.03mm to 0.10mm; or,

the thickness of the glue layer between the conducting layer and the non-conducting layer is 0.003mm-0.015mm; or,

the thickness of the conducting layer of the anode packaging film and the conducting layer of the cathode packaging film is 0.01mm-0.07 mm.

9. The battery of claim 1 or 2, wherein the electrically conductive layer of the separator assembly is a steel foil or an aluminum-plated copper layer; or

The non-conductive layer of the isolation assembly is a PP or PET layer; or

The glue layer of the isolation assembly is MPP.

10. The battery of claim 1 or 2, wherein the electrically conductive layer of the separator assembly is a steel foil.

11. The battery of claim 1 or 2, wherein the thickness of the non-conductive layer of the separator assembly is 0.03mm to 0.10mm; or,

the thickness of the glue layer of the isolation assembly is 0.003mm-0.015mm; or,

the thickness of the conducting layer of the isolation component is 0.01mm-0.07mm; or,

the length of the groove of the isolation component is 20% -40% of the length of the conducting layer.

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