Battery cell, battery and electric device

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a battery cell, a battery and a power utilization device, the battery cell comprises a positive plate, a negative plate and a diaphragm, the positive plate, the diaphragm and the negative plate are sequentially stacked and wound to form the battery cell, the positive plate comprises a positive active material layer, the negative plate comprises a negative active material layer, and the diaphragm is arranged on the positive active material layer. The positive electrode active material layer and the negative electrode active material layer are oppositely arranged, each of the positive electrode active material layer and the negative electrode active material layer is provided with a starting end and a terminating end, and the starting end of the positive electrode active material layer and the starting end of the negative electrode active material layer are correspondingly arranged; the termination end of the positive electrode active material layer and the termination end of the negative electrode active material layer are correspondingly arranged; and lithium precipitation caused by insufficient unit area capacity of the corresponding part of the negative electrode active material layer and the positive electrode active material layer is effectively avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a battery cell, a battery and an electrical device. Background Art

[0002] As a new type of secondary battery, lithium-ion batteries have the advantages of high energy density and power density, high operating voltage, light weight, small size, long cycle life, good safety, and green environmental protection. They have broad application prospects in portable appliances, power tools, large-scale energy storage, electric transportation power supply, etc.

[0003] Electrode coating generally involves evenly applying a well-stirred slurry to the current collector and drying the organic solvent in the slurry. During the electrode coating process, defects often occur due to the flow characteristics of the slurry. Specifically, the coating at the beginning of the electrode often appears too thick due to excessive slurry application, while the coating at the end of the electrode often appears thin due to insufficient slurry application.

[0004] When a wound battery cell is made using the existing conventional winding process, the starting end of the coating on the positive electrode sheet will correspond to the ending end of the coating on the negative electrode sheet, which makes the negative electrode unit area capacity at the ending end of the coating on the negative electrode sheet smaller than the unit area capacity at the starting end of the coating on the positive electrode sheet, resulting in lithium deposition at the ending end of the coating on the negative electrode sheet during the battery charging and discharging process. Utility Model Content

[0005] The purpose of the present utility model is to provide a battery cell, a battery and an electrical device to address the deficiencies of the prior art, thereby solving the technical problem in the prior art that the capacity of the terminating end of the coating of the negative electrode sheet does not match the capacity of the starting end of the coating of its corresponding positive electrode sheet, resulting in lithium deposition at the terminating end of the coating of the negative electrode sheet during the battery charging and discharging process.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] In the first aspect, the utility model provides a battery cell, comprising a positive electrode sheet, a negative electrode sheet and a separator, wherein the positive electrode sheet, the separator and the negative electrode sheet are stacked and wound in sequence to form a battery cell, the positive electrode sheet comprises a positive electrode active material layer, the negative electrode sheet comprises a negative electrode active material layer, the positive electrode active material layer and the negative electrode active material layer are arranged opposite to each other, the positive electrode active material layer and the negative electrode active material layer both have a starting end and an ending end, the starting end of the positive electrode active material layer is arranged corresponding to the starting end of the negative electrode active material layer, and the ending end of the positive electrode active material layer is arranged corresponding to the ending end of the negative electrode active material layer.

[0008] Preferably, the positive electrode active material layer includes a first coating segment and a second coating segment, the length of the second coating segment is greater than the length of the first coating segment, the first coating segment is arranged on one side of the positive electrode sheet, and the second coating segment is arranged on the other side of the positive electrode sheet; the negative electrode active material layer includes a third coating segment and a fourth coating segment, the length of the fourth coating segment is greater than the length of the third coating segment, the third coating segment is arranged on one side of the negative electrode sheet, and the fourth coating segment is arranged on the other side of the negative electrode sheet;

[0009] Wherein, when the first coating section and the third coating section are arranged opposite to each other, the starting end of the first coating section is arranged corresponding to the starting end of the third coating section, and the ending end of the first coating section is arranged corresponding to the ending end of the third coating section;

[0010] And / or, when the second coating segment is arranged opposite to the fourth coating segment, the starting end of the second coating segment is arranged corresponding to the starting end of the fourth coating segment, and the ending end of the second coating segment is arranged corresponding to the ending end of the fourth coating segment.

[0011] Preferably, in the inner ring of the battery cell, the starting end of the first coating segment and the ending end of the second coating segment are aligned, and the starting end of the third coating segment and the ending end of the fourth coating segment are staggered;

[0012] On the outer ring of the battery cell, the terminating end of the first coating segment and the starting end of the second coating segment are staggered, and the terminating end of the third coating segment and the starting end of the fourth coating segment are aligned.

[0013] Preferably, when the terminating end of the third coating segment and the starting end of the fourth coating segment are aligned on the outer ring of the battery cell, the terminating end of the third coating segment is adjacent to a misaligned segment.

[0014] Preferably, the length of the dislocation section is 1 to 5 mm.

[0015] Preferably, along the winding direction of the battery core, the offset section extends to the outside of the edge of the starting end of the second coating section.

[0016] Preferably, at the winding starting end of the battery cell, the terminating end of the second coating section is aligned with the terminating end of the fourth coating section.

[0017] Preferably, the coating direction of the first coating section is opposite to that of the second coating section, and the coating direction of the third coating section is opposite to that of the fourth coating section.

[0018] In a second aspect, the utility model provides a battery, comprising a shell, a top cover, and the battery cell of the above embodiment, wherein the top cover is arranged on the opening of the shell, the shell has a receiving cavity, and the battery cell is arranged in the receiving cavity.

[0019] In a third aspect, the present invention provides an electrical device comprising the battery of the above embodiment.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0021] The battery cell of the embodiment of the present invention is formed by the coordinated use of a positive electrode sheet, a negative electrode sheet and a separator. The positive electrode sheet, the separator and the negative electrode sheet are stacked and wound in sequence to form a battery cell. The positive electrode active material layer of the positive electrode sheet and the negative electrode active material layer of the negative electrode sheet are arranged opposite to each other. The starting end of the positive electrode active material layer and the starting end of the negative electrode active material layer are arranged correspondingly, and the ending end of the positive electrode active material layer and the ending end of the negative electrode active material layer are arranged correspondingly, which effectively avoids lithium deposition due to insufficient capacity per unit area in the corresponding parts of the negative electrode active material layer and the positive electrode active material layer.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Figure 1 This is a schematic structural diagram of the pole piece stacking structure of the present invention.

[0025] Figure 2 This is a schematic structural diagram of the positive electrode sheet of the present utility model.

[0026] Figure 3 It is a structural schematic diagram of the negative electrode sheet of the utility model.

[0027] The description of the accompanying drawings is as follows:

[0028] 100, battery cell;

[0029] 10. Positive electrode sheet; 11. Positive electrode active material layer; 111. First coating section; 1111. Starting end of first coating section; 1112. End of first coating section; 112. Second coating section; 1121. Starting end of second coating section; 1122. End of second coating section; 12. Positive electrode current collector;

[0030] 20. Negative electrode sheet; 21. Negative electrode active material layer; 211. Third coating segment; 2111. Starting end of third coating segment; 2112. End of third coating segment; 212. Fourth coating segment; 2121. Starting end of fourth coating segment; 2122. End of fourth coating segment; 213. Dislocation segment; 22. Negative electrode current collector;

[0031] 30. Diaphragm;

[0032] L, the length of the dislocation segment; H, the winding direction of the battery cell. DETAILED DESCRIPTION

[0033] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of the components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0034] Furthermore, the terms “first,” “second,” etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

[0035] In this utility model, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0036] The following will be combined with the Figures 1 to 3The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] The electrical device of the embodiment of the present utility model includes a battery. The electrical device can be a car, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The car can be a fuel car, a gas car or a new energy car, and the new energy car can be a pure electric car, a hybrid car or an extended-range car, etc.; the spacecraft includes airplanes, rockets, space shuttles and spacecraft, etc.; the electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.; the electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc. The embodiment of the present application does not impose any special restrictions on the above-mentioned electrical devices.

[0038] The battery of the embodiment of the present invention includes a shell, a top cover and a battery cell 100. The top cover is arranged to cover the opening of the shell. The shell has a receiving cavity. The battery cell 100 is arranged in the receiving cavity.

[0039] See also Figures 1 to 3 The battery cell 100 of an embodiment of the present invention includes a positive electrode sheet 10, a negative electrode sheet 20 and a separator 30. The positive electrode sheet 10, the separator 30 and the negative electrode sheet 20 are stacked and wound in sequence to form the battery cell 100. The positive electrode sheet 10 includes a positive electrode active material layer 11, and the negative electrode sheet 20 includes a negative electrode active material layer 21. The positive electrode active material layer 11 and the negative electrode active material layer 21 are arranged opposite to each other. The positive electrode active material layer 11 and the negative electrode active material layer 21 both have a starting end and an ending end. The starting end of the positive electrode active material layer 11 is arranged corresponding to the starting end of the negative electrode active material layer 21, and the ending end of the positive electrode active material layer 11 is arranged corresponding to the ending end of the negative electrode active material layer 21.

[0040] Compared with the prior art, the battery cell 100 of the embodiment of the present invention is formed by the coordinated use of a positive electrode sheet 10, a negative electrode sheet 20 and a separator 30. The positive electrode sheet 10, the separator 30 and the negative electrode sheet 20 are stacked and wound in sequence to form the battery cell 100. The positive electrode active material layer 11 of the positive electrode sheet 10 and the negative electrode active material layer 21 of the negative electrode sheet 20 are arranged opposite to each other. The starting end of the positive electrode active material layer 11 is arranged corresponding to the starting end of the negative electrode active material layer 21, and the ending end of the positive electrode active material layer 11 is arranged corresponding to the ending end of the negative electrode active material layer 21, which effectively avoids lithium deposition due to insufficient capacity per unit area in the corresponding parts of the negative electrode active material layer 21 and the positive electrode active material layer 11.

[0041] See also Figures 1 to 3 In some embodiments, the positive electrode active material layer 11 includes a first coating segment 111 and a second coating segment 112. The length of the second coating segment 112 is greater than that of the first coating segment 111. The first coating segment 111 is disposed on one side of the positive electrode sheet 10, and the second coating segment 112 is disposed on the other side of the positive electrode sheet 10. By cooperating with the first coating segment 111 and the second coating segment 112, the length of the second coating segment 112 is greater than that of the first coating segment 111, effectively increasing the amount of active material coated in the second coating segment 112, thereby improving the overall energy density of the battery.

[0042] Similarly, the negative electrode active material layer 21 includes a third coating segment 211 and a fourth coating segment 212. The fourth coating segment 212 is longer than the third coating segment 211. The third coating segment 211 is disposed on one side of the negative electrode sheet 20, and the fourth coating segment 212 is disposed on the other side of the negative electrode sheet 20. The coordinated use of the third coating segment 211 and the fourth coating segment 212 increases the length of the fourth coating segment 212 to be longer than the third coating segment 211, effectively increasing the amount of active material coated in the fourth coating segment 212 and thereby improving the overall energy density of the battery.

[0043] Furthermore, when the first coating section 111 and the third coating section 211 are arranged opposite to each other, the starting end 1111 of the first coating section is arranged corresponding to the starting end 2111 of the third coating section, and the ending end 1112 of the first coating section is arranged corresponding to the ending end 2112 of the third coating section;

[0044] And / or, when the second coating segment 112 is arranged opposite to the fourth coating segment 212, the starting end 1121 of the second coating segment is arranged corresponding to the starting end 2121 of the fourth coating segment, and the terminating end 1122 of the second coating segment is arranged corresponding to the terminating end 2122 of the fourth coating segment.

[0045] By arranging the first coating section 111 and the third coating section 211 in correspondence with the above structure, and arranging the second coating section 112 and the fourth coating section 212 in correspondence with the above structure, lithium deposition due to insufficient capacity per unit area in the corresponding parts of the negative electrode active material layer 21 and the positive electrode active material layer 11 can be effectively avoided.

[0046] It is understood that the positive electrode sheet 10 further includes a positive electrode current collector 12, the first coating section 111 is disposed on one side of the positive electrode current collector 12, and the second coating section 112 is disposed on the other side of the positive electrode current collector 12. The negative electrode sheet 20 further includes a negative electrode current collector 22, the third coating section 211 is disposed on one side of the negative electrode current collector 22, and the fourth coating section 212 is disposed on the other side of the negative electrode current collector 22.

[0047] It is understood that the starting end of the positive electrode active material layer 11, the starting end of the negative electrode active material layer 21, the starting end 1111 of the first coating segment, the starting end 1121 of the second coating segment, the starting end 2111 of the third coating segment, and the starting end 2121 of the fourth coating segment all refer to the position where the active material slurry used to form the active material layer first falls onto the current collector. The ending end of the positive electrode active material layer 11, the ending end of the negative electrode active material layer 21, the ending end 1112 of the first coating segment, the ending end 1122 of the second coating segment, the ending end 2112 of the third coating segment, and the ending end 2122 of the fourth coating segment all refer to the position where the active material slurry used to form the active material layer last falls onto the current collector.

[0048] Of course, since the coating of the active material slurry is achieved through the coating head, the starting end of the positive active material layer 11, the starting end of the negative active material layer 21, the starting end 1111 of the first coating section, the starting end 1121 of the second coating section, the starting end 2111 of the third coating section and the starting end 2121 of the fourth coating section can also be understood as: the position where the active material layer first passes through the coating head; similarly, the ending end of the positive active material layer 11, the ending end of the negative active material layer 21, the ending end 1112 of the first coating section, the ending end 1122 of the second coating section, the ending end 2112 of the third coating section and the ending end 2122 of the fourth coating section can also be understood as: the position where the active material layer last passes through the coating head.

[0049] See also Figures 1 to 3 In some embodiments, the coating direction of the first coating section 111 is opposite to that of the second coating section 112, and the coating direction of the third coating section 211 is opposite to that of the fourth coating section 212. Setting opposite coating directions helps form a more uniform coating on the electrode surface, reduces the increase in internal resistance caused by uneven coating, and thus improves the charge and discharge efficiency of the battery.

[0050] See also Figures 1 to 3 In some embodiments, in the inner ring of the battery cell 100, the starting end 1111 of the first coating segment and the ending end 1122 of the second coating segment are aligned, and the starting end 2111 of the third coating segment and the ending end 2122 of the fourth coating segment are staggered;

[0051] On the outer ring of the battery cell 100 , the terminating end 1112 of the first coating segment and the starting end 1121 of the second coating segment are staggered, and the terminating end 2112 of the third coating segment and the starting end 2121 of the fourth coating segment are aligned.

[0052] See also Figure 1 and Figure 3 In some embodiments, when the terminating end 2112 of the third coating segment and the starting end 2121 of the fourth coating segment are aligned on the outer ring of the battery cell 100, the terminating end 2112 of the third coating segment is adjacent to the offset segment 213. The provision of the offset segment 213, which is adjacent to the third coating segment 211, effectively extends the coating length of the third coating segment 211, thereby extending the coating length of the negative electrode active material layer 21. This allows the positive electrode active material layer 11 to be coated longer while ensuring overhang, thereby increasing the coating amount of the negative and positive electrode active materials, and thereby improving the overall energy density of the battery.

[0053] Furthermore, the length L of the dislocation segment 213 is 1 to 5 mm. The length L of the dislocation segment 213 cannot be too long or too short. When the length L of the dislocation segment 213 is too short, that is, the length L of the dislocation segment 213 is less than 1 mm, the amount of coating of the negative electrode active material is small, so that the amount of coating of the positive electrode active material can be increased is small, or the positive electrode active material layer 11 cannot be extended while ensuring the overhang, resulting in a small effect on improving the overall energy density of the battery. When the length L of the dislocation segment 213 is too long, that is, the length L of the dislocation segment 213 is greater than 5 mm, the amount of coating of the negative electrode active material is large, so that the amount of coating of the positive electrode active material can be increased. Although the overall energy density of the battery can be improved to a certain extent, as the amount of coating of the negative electrode active material and the amount of coating of the positive electrode active material increase, the material cost increases.

[0054] Therefore, setting the length L of the offset section 213 to 1-5 mm can effectively improve the overall energy density of the battery while controlling the material cost of the battery.

[0055] Furthermore, when the designed charge and discharge rate of the battery cell 100 is less than or equal to 3C, the length L of the dislocation segment 213 is 1 to 3 mm; when the designed charge and discharge rate of the battery cell 100 is greater than 3C, the length L of the dislocation segment 213 is 3 to 5 mm.

[0056] Specifically, the length L of the offset segment 213 is 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, 2.4 mm, 2.7 mm, 3 mm, 3.1 mm, 3.5 mm, 3.9 mm, 4 mm, 4.3 mm, 4.6 mm, 4.9 mm or 5 mm, but is not limited to the listed values, and other values ​​within the numerical range are also applicable.

[0057] It can be understood that “overhang” means that the negative electrode active material layer 21 exceeds the distance of the positive electrode active material layer 11 that it faces.

[0058] See also Figures 1 to 3 In some embodiments, along the winding direction H of the battery cell 100, the dislocated segment 213 extends to the outside of the edge of the starting end 1121 of the second coating segment. By extending the dislocated segment 213 to the outside of the edge of the starting end 1121 of the second coating segment, it is effectively ensured that the negative electrode active material layer 21 can extend beyond the positive electrode active material layer 11 in the area corresponding to the negative electrode active material layer 21 and the positive electrode active material layer 11. This avoids the problem of lithium deposition caused by insufficient capacity per unit area in the area corresponding to the negative electrode active material layer 21 and the positive electrode active material layer 11 during the battery charging and discharging process.

[0059] See also Figures 1 to 3 In some embodiments, at the starting end of the winding of the battery cell 100, the terminal end 1122 of the second coating segment is aligned with the terminal end 2122 of the fourth coating segment. Since the terminal end 1122 of the second coating segment is arranged corresponding to the terminal end of the fourth coating segment 212, lithium deposition due to insufficient capacity per unit area in the portion corresponding to the negative electrode active material layer 21 and the positive electrode active material layer 11 is effectively avoided. Therefore, when the battery cell 100 is wound, the starting end of the negative electrode sheet 20 does not need to be folded back to avoid lithium deposition in the area prone to lithium deposition. Instead, the terminal end 1112 of the first coating segment and the terminal end 1122 of the second coating segment are aligned, thereby saving space occupied by the folded portion of the negative electrode sheet 20 and improving the overall energy density of the battery.

[0060] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

Claims

1. A battery cell, characterized in that: The invention comprises a positive electrode sheet (10), a negative electrode sheet (20) and a separator (30), wherein the positive electrode sheet (10), the separator (30) and the negative electrode sheet (20) are stacked and wound in sequence to form a battery core (100), wherein the positive electrode sheet (10) comprises a positive electrode active material layer (11), and the negative electrode sheet (20) comprises a negative electrode active material layer (21), wherein the positive electrode active material layer (11) and the negative electrode active material layer (21) are arranged opposite to each other, and the positive electrode active material layer (11) and the negative electrode active material layer (21) both have a starting end and an ending end, wherein the starting end of the positive electrode active material layer (11) is arranged corresponding to the starting end of the negative electrode active material layer (21), and the ending end of the positive electrode active material layer (11) is arranged corresponding to the ending end of the negative electrode active material layer (21).

2. The battery cell according to claim 1, wherein: The positive electrode active material layer (11) comprises a first coating section (111) and a second coating section (112), the length of the second coating section (112) is greater than the length of the first coating section (111), the first coating section (111) is arranged on one side of the positive electrode sheet (10), and the second coating section (112) is arranged on the other side of the positive electrode sheet (10); the negative electrode active material layer (21) comprises a third coating section (211) and a fourth coating section (212), the length of the fourth coating section (212) is greater than the length of the third coating section (211), the third coating section (211) is arranged on one side of the negative electrode sheet (20), and the fourth coating section (212) is arranged on the other side of the negative electrode sheet (20); Wherein, when the first coating section (111) and the third coating section (211) are arranged relative to each other, the starting end (1111) of the first coating section and the starting end (2111) of the third coating section are arranged correspondingly, and the terminating end (1112) of the first coating section and the terminating end (2112) of the third coating section are arranged correspondingly; And / or, when the second coating section (112) is arranged relative to the fourth coating section (212), the starting end (1121) of the second coating section is arranged correspondingly to the starting end (2121) of the fourth coating section, and the ending end (1122) of the second coating section is arranged correspondingly to the ending end (2122) of the fourth coating section.

3. The battery cell according to claim 2, wherein: The coating direction of the first coating section (111) is opposite to the coating direction of the second coating section (112), and the coating direction of the third coating section (211) is opposite to the coating direction of the fourth coating section (212).

4. The battery cell according to claim 3, wherein: In the inner circle of the battery cell (100), the starting end (1111) of the first coating section and the ending end (1122) of the second coating section are aligned, and the starting end (2111) of the third coating section and the ending end (2122) of the fourth coating section are staggered; On the outer ring of the battery cell (100), the terminating end (1112) of the first coating segment and the starting end (1121) of the second coating segment are staggered, and the terminating end (2112) of the third coating segment and the starting end (2121) of the fourth coating segment are aligned.

5. The battery cell according to claim 4, wherein: When the terminating end (2112) of the third coating segment and the starting end (2121) of the fourth coating segment are aligned on the outer ring of the battery cell (100), the terminating end (2112) of the third coating segment is adjacent to the misaligned segment (213).

6. The battery cell according to claim 5, wherein: The length (L) of the dislocation section (213) is 1 to 5 mm.

7. The battery cell according to claim 5, wherein: Along the winding direction (H) of the battery core (100), the offset section (213) extends to the outside of the edge of the starting end (1121) of the second coating section.

8. The battery cell according to claim 4, wherein: At the winding starting end of the battery cell (100), the terminating end (1122) of the second coating section is aligned with the terminating end (2122) of the fourth coating section.

9. A battery, characterized in that: The invention comprises a shell, a top cover and the battery cell according to any one of claims 1 to 8, wherein the top cover is arranged on the opening of the shell, the shell has a receiving cavity, and the battery cell (100) is arranged in the receiving cavity.

10. An electrical device, characterized in that: A battery comprising the battery of claim 9.

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