CN111987369A - Composite power energy storage battery cell - Google Patents

Abstract

The invention discloses a composite power energy storage battery, which comprises a polymer soft pack, at least one battery unit and at least one capacitor unit which are arranged in the polymer soft pack and are combined into one. The composite power energy storage cell of the present invention can not only reduce the volume and weight and improve the energy density by combining the battery unit and the capacitor unit, but also can reduce the volume and weight between the battery units, between the capacitor units and between the battery unit and the capacitor unit. The output power can be combined arbitrarily between the two batteries. Under the condition that the energy storage capacity and high-power discharge requirements are met, the output power ratio of the battery unit and the capacitor unit can be controlled according to different application scenarios, so as to realize that the battery unit is always at the best rate. operation to achieve the purpose of long-distance and long-life recycling.

Description

Composite power storage battery

technical field

The present invention is in the technical field of energy storage devices, in particular to a composite power energy storage cell.

Background technique

The Chinese patent with publication number CN203503746U discloses a lithium-ion battery and capacitor integrated battery, comprising a cylindrical steel case with an opening at the top and a cylindrical capacitor provided at the top opening of the cylindrical steel case, wherein the inner part of the cylindrical steel case is A cylindrical battery cell is provided. The cylindrical battery core is composed of a positive electrode sheet with a positive electrode lug, a negative electrode sheet with a negative electrode lug and a diaphragm, which are stacked and wound in sequence. The negative electrode lug at the bottom of the cylindrical battery core and the cylindrical steel shell The bottom is connected, the top of the cylindrical steel shell is connected with the shell of the cylindrical capacitor and constitutes the negative electrode of the battery; the positive ear on the top of the cylindrical cell is connected with the positive electrode on the top of the cylindrical capacitor through the bottom of the cylindrical capacitor, so The inside of the cylindrical steel shell is provided with a lithium-ion battery electrolyte.

The lithium-ion battery and the capacitor integrated battery essentially integrate the independent capacitor and the independent lithium-ion battery by mechanical means, that is, the integrated battery does not reduce the volume of the capacitor and the lithium-ion battery. small volume purpose. In addition, the integrated battery directly connects the capacitor and the lithium-ion battery in parallel through the structure, which cannot achieve the technical purpose of charging and discharging the capacitor and the lithium-ion battery separately, and cannot adjust the power output mode of the battery and the capacitor according to the application scenario.

With the development of the field of energy storage technology, those skilled in the art find that capacitors and batteries have their own characteristics, advantages and disadvantages. Capacitors have the advantages of fast charging and discharging and long service life, and can be used to output high power, but the energy storage capacity is smaller than that of batteries. The battery has the advantage of large energy storage capacity, but has the disadvantage of slow charging and discharging. If it is used to output high power, its service life will be greatly affected.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a composite power energy storage battery, which can not only reduce the volume and weight, improve the energy density, but also can realize the battery cell under the condition that the energy storage capacity and high-power discharge requirements are met. Always run at the best magnification to achieve the purpose of long-distance and long-life cycle use.

To achieve the above object, the present invention provides the following technical solutions:

A composite power energy storage battery comprises a soft polymer package body, and at least one battery unit and at least one capacitor unit which are arranged in the polymer soft package body and are combined into one.

Further, each of the battery units is provided with a positive electrode lug and a negative electrode lug; or,

When the battery cells include at least two, all the battery cells can be further combined into at least one battery cell group, and among all the battery cell groups, at least one of the battery cell groups includes at least two battery cells in parallel with each other. or battery units connected in series; all the battery units in the battery unit group are connected according to a preset connection mode and are provided with a positive electrode lug and a negative electrode lug.

Further, each of the capacitor units is provided with a first tab and a second tab; or,

When the capacitor units include at least two, all the capacitor units may be further combined into at least one capacitor unit group, and in all the capacitor unit groups, at least one of the capacitor unit groups includes at least two capacitor units in parallel with each other or capacitor units connected in series; all the capacitor units in the capacitor unit group are connected according to a preset connection mode and are provided with a first tab and a second tab.

Further, the battery unit includes a battery diaphragm, a positive electrode and a negative electrode are respectively provided on both sides of the battery diaphragm, and a battery electrolyte is provided between the positive electrode and the negative electrode;

The capacitor unit includes a capacitor diaphragm, two sides of the capacitor diaphragm are respectively provided with a first electrode and a second electrode, and a capacitor electrolyte is provided between the first electrode and the second electrode.

Further, the battery unit and the capacitor unit are stacked together;

When the adjacent battery units and the capacitor units are connected in series or in parallel, an ion insulator that is electrically conductive but ion-isolated is provided between the adjacent battery units and the capacitor unit;

When the adjacent battery units and the capacitor units are independent of each other, an insulator/current collector plate that is electrically insulating and ionically insulating is provided between the adjacent battery units and the capacitor unit.

Further, the battery cells are stacked together;

When two adjacent battery cells are connected in series or in parallel, a battery conductive layer with electron conduction but ion isolation is provided between the two adjacent battery cells;

When two adjacent battery cells are independent of each other, a battery insulating layer with electronic insulation and ion isolation is provided between the two adjacent battery cells.

Further, the capacitor units are stacked together;

When two adjacent capacitor units are connected in series or in parallel, a capacitor conductive layer that is electrically conductive but ionically isolated is provided between the two adjacent capacitor units;

When two adjacent capacitor units are independent of each other, a capacitor insulating layer with electronic insulation and ion isolation is provided between the two adjacent capacitor units.

The beneficial effects of the present invention are:

The composite power energy storage cell of the present invention can not only reduce the volume and weight and improve the energy density by combining the battery unit and the capacitor unit, but also can reduce the volume and weight between the battery units, between the capacitor units and between the battery unit and the capacitor unit. The power output can be combined arbitrarily between the two batteries. Under the condition that the energy storage capacity and high power discharge requirements are met, the output power ratio of the battery unit and the capacitor unit can be controlled according to different application scenarios, so as to realize that the battery unit is always at the best rate. operation to achieve the purpose of long-distance and long-life recycling.

Description of drawings

In order to make the purpose, technical solutions and beneficial effects of the present invention clearer, the present invention provides the following drawings for description:

1 is a schematic structural diagram of an embodiment of a composite power energy storage cell of the present invention, specifically a structural schematic diagram when a battery unit and a capacitor unit are combined into one;

FIG. 2 is a schematic structural diagram when a battery unit is combined with a plurality of capacitor units;

FIG. 3 is a schematic structural diagram when a plurality of battery cells and a capacitor unit are combined into one;

4 is a schematic structural diagram when a plurality of battery units and a plurality of capacitor units are combined into one;

5 is a schematic diagram of a stacked structure between two adjacent battery cells;

6 is a schematic diagram of a stacked structure between two adjacent capacitor units;

7 is a schematic structural diagram of a battery unit;

8 is a schematic structural diagram of a capacitor unit;

9 is a schematic structural diagram when a positive electrode lug and a negative electrode lug are provided on each battery unit;

10 is a schematic structural diagram when a positive electrode lug and a negative electrode lug are provided on each battery unit group;

11 is a schematic structural diagram when a first tab and a second tab are provided on each capacitor unit;

FIG. 12 is a schematic structural diagram when each capacitor unit group is provided with a first tab and a second tab.

Description of reference numbers:

11-polymer soft package; 12-battery unit; 13-capacitor unit; 14-ion insulator; 15-insulator/current collector; 16-battery conductive layer; 17-battery insulating layer; 18-capacitor conductive layer; 19-capacitor insulating layer;

120-battery unit group; 121-battery separator; 122-positive electrode; 123-negative electrode; 124-positive ear; 125-negative ear;

130-capacitive unit group; 131-capacitive diaphragm; 132-first electrode; 133-second electrode; 134-first tab; 135-second tab.

Detailed ways

The present invention is further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

As shown in FIG. 1 , it is a schematic structural diagram of an embodiment of a composite power energy storage cell of the present invention. The composite power energy storage cell of this embodiment includes a soft polymer body 11 and at least one battery unit 12 and at least one capacitor unit 13 which are disposed in the polymer soft body 11 and are integrated into one.

The battery unit 12 of the present embodiment includes a battery separator 121 . The positive electrode 122 and the negative electrode 123 are respectively provided on both sides of the battery separator 121 , and a battery electrolyte is provided between the positive electrode 122 and the negative electrode 123 , as shown in FIG. 7 .

The capacitor unit 13 in this embodiment includes a capacitor diaphragm 131 , a first electrode 132 and a second electrode 133 are respectively provided on both sides of the capacitor diaphragm 131 , and a capacitor electrolyte is provided between the first electrode 132 and the second electrode 133 , as shown in the figure 8 shown.

Specifically, the battery unit 12 and the capacitor unit 13 in this embodiment are stacked together. And when adjacent battery cells 12 and capacitor units 13 are connected in series or in parallel, ion insulators 14 that are electrically conductive but ion-isolated are provided between the adjacent battery cells 12 and capacitor units 13 . When adjacent battery units 12 and capacitor units 13 are independent of each other, an insulator/current collector 15 that is electrically insulating and ionically insulating is provided between the adjacent battery units 12 and capacitor units 13 . By arranging the ion isolator 14 or the insulator/current collector 15 between the battery unit 12 and the capacitor unit 13, the battery unit 12 and the capacitor unit 13 can be connected in series, parallel and independent of each other at the physical structure level inside the battery cell. Insulation, and external power output.

As shown in FIG. 1, it is a schematic structural diagram of a battery unit 12 and a capacitor unit 13 when they are combined together. According to the difference in the connection relationship between the battery unit 12 and the capacitor unit 13, the connection between the battery unit 12 and the capacitor unit 13 can be changed. An ion isolator 14 or an insulator/current collector plate 15 is interposed therebetween.

As shown in FIG. 2 , it is a schematic structural diagram when a battery unit 12 and a plurality of capacitor units 13 are combined together. According to the difference in the connection relationship between the battery unit 12 and the capacitor unit 13 , the battery unit 12 and the capacitor unit 13 An ionic isolator 14 or an insulator/current collector plate 15 is provided in between. The number of capacitor units 13 can be set according to actual requirements, that is, the number of capacitor units 13 can be 2, 3, 4, or more than 4, etc., which will not be repeated.

As shown in FIG. 3 , it is a schematic structural diagram when a plurality of battery units 12 and one capacitor unit 13 are combined together. According to the difference in the connection relationship between the battery unit 12 and the capacitor unit 13 , between the battery unit 12 and the capacitor unit 13 An ionic isolator 14 or an insulator/current collector plate 15 is provided in between. The number of battery units 12 can be set according to actual requirements, that is, the number of battery units 12 can be 2, 3, 4, or more than 4, etc., which will not be repeated.

As shown in FIG. 4 , it is a schematic structural diagram when a plurality of battery units 12 and a plurality of capacitor units 13 are combined together. According to the difference in the connection relationship between the battery unit 12 and the capacitor unit 13 , between the battery unit 12 and the capacitor unit 13 An ion isolator 14 or an insulator/current collector plate 15 is provided between 13 . The number of battery units 12 can be set according to actual needs, that is, the number of battery units 12 can be 2, 3, 4, or more than 4, etc., and will not be repeated; similarly, the number of capacitor units 13 can be based on actual needs. The setting, that is, the number of the capacitor units 13 may be 2, 3, 4, or more than 4, etc., which will not be described repeatedly. In addition, the number of battery units 12 and the number of capacitor units 13 can be arbitrarily set according to actual needs, that is, the number of battery units 12 and the number of capacitor units 13 may be equal or unequal, and will not be described again.

Specifically, the battery cells 12 in this embodiment are stacked together. And when two adjacent battery cells 12 are connected in series or in parallel, a battery conductive layer 16 that is electrically conductive but ionically isolated is provided between the two adjacent battery cells 12; When they are independent of each other, a battery insulating layer 17 that is electrically insulating and ionically insulating is provided between the two adjacent battery cells 12 . As shown in FIG. 5 , which is a schematic diagram of the structure between two adjacent battery cells 12 , a battery conductive layer 16 or a battery can be arranged between two adjacent battery cells 12 according to the difference in the connection relationship between the battery cells 12 . Insulating layer 17 . By arranging the battery conductive layer 16 or the battery insulating layer 17 between two adjacent battery cells 12, the battery cells 12 can be connected in series, in parallel, and isolated from each other at the physical structure level inside the cell, and output to the outside. electrical energy.

Specifically, the capacitor units 13 in this embodiment are stacked together. And when two adjacent capacitor units 13 are connected in series or in parallel, a capacitor conductive layer 18 that is electrically conductive but ionically isolated is provided between the two adjacent capacitor units 13; when two adjacent capacitor units 13 When they are independent of each other, a capacitor insulating layer 19 that is electrically insulating and ionically isolated is provided between the two adjacent capacitor units 13 . As shown in FIG. 6 , which is a schematic diagram of the structure between two adjacent capacitor units 13 , a capacitor conductive layer 18 or a capacitor can be arranged between two adjacent capacitor units 13 according to the difference in the connection relationship between the capacitor units 13 . insulating layer 19 . By arranging a capacitive conductive layer 18 or a capacitive insulating layer 19 between two adjacent capacitor units 13, the capacitor units 13 can be connected in series, in parallel, and isolated from each other at the physical structure level inside the cell, and output to the outside. electrical energy.

Specifically, each battery unit 12 may be provided with a positive electrode lug 124 and a negative electrode lug 125, so that it can be electrically connected to the positive electrode lug 124 and the negative electrode lug 125 of each battery unit 12 through an external circuit. An external circuit is used to realize the series connection, parallel connection, and series-parallel hybrid connection between the battery cells 12 and to output electric energy independently of each other, as shown in FIG. 9 .

When there are at least two battery cells 12, all the battery cells 12 can be further combined into at least one battery cell group 120, and among all the battery cell groups 120, at least one battery cell group 120 includes at least two battery cells connected in series or battery cells 12 in parallel. When the number of battery cell groups 120 is greater than or equal to 2, the number of battery cells 12 included in each battery cell group 120 may be equal or may not be equal. After all the battery cells 12 in the battery cell group 120 are connected in a preset connection manner, a positive electrode tab 124 and a negative electrode tab 125 are provided. In this way, the positive terminal 124 and the negative terminal 125 of each battery cell group 120 can be electrically connected to each other through an external circuit, and the series, parallel, series-parallel mixed connection and mutual connection between the battery cell groups 120 can be realized through the external circuit. Independent external power output, as shown in Figure 10. Specifically, when the number of battery cells 12 in the battery cell group 120 is greater than or equal to 2, the battery conductive layer 16 can be provided between two adjacent battery cells belonging to the same battery cell group 120, and the battery cell can be placed inside the battery cell. At the physical structure level, the series, parallel and series-parallel hybrid connections between all the battery cells 12 belonging to the same battery cell group 120 are realized, which will not be repeated.

Specifically, a first tab 134 and a second tab 135 may also be provided on each capacitor unit 13 , so that the first tab 134 and the second tab 135 of each capacitor unit 13 can be respectively connected with the external circuit through an external circuit. The diode tabs 135 are electrically connected, and the capacitor units 13 can be connected in series, in parallel, or in a series-parallel combination through an external circuit, and can output electrical energy independently of each other, as shown in FIG. 11 .

When there are at least two capacitor units 13, all the capacitor units 13 may be further combined into at least two capacitor unit groups 130, and among all the capacitor unit groups 130, at least one capacitor unit group 130 includes at least two Capacitive units 13 connected in series or in parallel. When the number of capacitor unit groups 130 is greater than or equal to two, the number of capacitor units 13 included in each capacitor unit group 130 may or may not be equal. A first tab 134 and a second tab 135 are provided after all the capacitor units 13 in the capacitor unit group 130 are connected in a preset connection manner. In this way, the first tab 134 and the second tab 135 of each capacitor unit group 130 can be electrically connected to each other through an external circuit, and the series, parallel, and series-parallel connection between the capacitor unit groups 130 can be realized through the external circuit. Mixed connection and independent external power output, as shown in Figure 12. Specifically, when the number of capacitor units 13 in the capacitor unit group 130 is greater than or equal to 2, the battery conductive layer 16 can be provided between two adjacent battery cells belonging to the same capacitor unit group 130 , and a battery conductive layer 16 can be arranged inside the battery cell. At the physical structure level, the series, parallel and series-parallel hybrid connections between all the capacitor units 13 belonging to the same capacitor unit group 130 are realized, which will not be repeated.

The composite power energy storage battery of this embodiment, by combining the battery unit 12 and the capacitor unit 13 together, can not only reduce the volume and weight, and improve the energy density, but also can be used at the level of the internal physical structure of the battery and through external The circuit realizes that the battery units 12, the capacitor units 13, and the battery unit 12 and the capacitor unit 13 can be arbitrarily combined to output electrical energy to the outside world. Under the condition that the energy storage capacity and high-power discharge requirements are met, it can be used according to different applications. The scene controls the output power ratio of the battery unit 12 and the capacitor unit 13, so as to realize that the battery unit 12 always runs at the optimal rate, and achieves the purpose of long-distance and long-life cycle use.

The above-mentioned embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention is subject to the claims.

Claims (7)

1. A composite power energy storage battery cell is characterized in that: the battery comprises a polymer soft package body, and at least one battery unit and at least one capacitor unit which are arranged in the polymer soft package body and are compounded into a whole.

2. The composite power energy storage cell of claim 1, wherein:

each battery unit is provided with a positive electrode lug and a negative electrode lug; or the like, or, alternatively,

when the battery cells include at least 2 battery cells, all the battery cells may be further combined into at least one battery cell group, and at least one of the battery cell groups includes at least two battery cells connected in parallel or in series; the battery unit group is provided with a positive electrode lug and a negative electrode lug.

3. The composite power energy storage cell of claim 1, wherein:

each capacitor unit is provided with a first tab and a second tab; or the like, or, alternatively,

when the capacitor units include at least 2 capacitor units, all the capacitor units may be further combined into at least one capacitor unit group, and at least one of the capacitor unit groups includes at least two capacitor units connected in parallel or in series; the capacitor unit group is provided with a first tab and a second tab.

4. The composite power energy storage cell of any of claims 1 to 3, wherein:

The battery unit comprises a battery diaphragm, a positive electrode and a negative electrode are respectively arranged on two sides of the battery diaphragm, and battery electrolyte is arranged between the positive electrode and the negative electrode;

the capacitor unit comprises a capacitor diaphragm, a first electrode and a second electrode are arranged on two sides of the capacitor diaphragm respectively, and capacitor electrolyte is arranged between the first electrode and the second electrode.

5. The composite power energy storage cell of claim 4, wherein:

the battery unit and the capacitor unit are laminated together;

when the adjacent battery units are connected in series or in parallel with the capacitor units, an ion insulator which is electrically conductive and ion-insulated is arranged between the adjacent battery units and the capacitor units;

when the adjacent battery units and the capacitor units are independent from each other, an insulator/collector plate which is electronically insulated and is isolated from ions is arranged between the adjacent battery units and the capacitor units.

6. The composite power energy storage cell of claim 4, wherein:

the battery cells are stacked together;

when two adjacent battery units are connected in series or in parallel, an electronically conductive and ion-isolated battery conductive layer is arranged between the two adjacent battery units;

When two adjacent battery units are independent from each other, an electronically-insulated and ion-isolated battery insulating layer is arranged between the two adjacent battery units.

7. The composite power energy storage cell of claim 4, wherein:

the capacitor units are stacked together;

when two adjacent capacitor units are connected in series or in parallel, a capacitor conducting layer which is electronically conducting and ion isolating is arranged between the two adjacent capacitor units;

when two adjacent capacitor units are independent from each other, a capacitor insulating layer which is electronically insulated and is isolated by ions is arranged between the two adjacent capacitor units.

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