Blade battery and battery pack

Abstract

The embodiment of the utility model provides a blade battery and a battery pack, the blade battery comprises a positive pole lug and a negative pole lug, and the positive pole lug and the negative pole lug are positioned on the same side of the blade battery and are distributed at intervals. Therefore, the positive pole lug and the negative pole lug are positioned on the same side of the blade battery, so that wiring of the blade battery is facilitated, and the wiring efficiency of the blade battery is improved. In addition, the positive tabs and the negative tabs are distributed at intervals, so that the risk that the positive tabs and the negative tabs interfere with each other is reduced, and normal work of the blade battery is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of blade batteries, and in particular to a blade battery and a battery pack. Background Art

[0002] Blade batteries have the advantages of small size, light weight and long service life. Blade batteries help to improve the space utilization of battery packs, expand the energy density of battery packs, and enhance the battery life of battery packs, thus gaining wide application.

[0003] However, the arrangement of the positive electrode tabs and the negative electrode tabs of the blade battery in the related art is unreasonable, which makes it inconvenient to wire the blade battery. Utility Model Content

[0004] The embodiment of the utility model proposes a blade battery or a battery pack to improve at least one of the above-mentioned technical problems.

[0005] The implementation method of the utility model achieves the above-mentioned purpose through the following technical solutions.

[0006] In a first aspect, an embodiment of the utility model provides a blade battery, which includes a positive electrode tab and a negative electrode tab, wherein the positive electrode tab and the negative electrode tab are located on the same side of the blade battery and are spaced apart.

[0007] In some embodiments, the blade battery has a first end and a second end, and the first end and the second end are respectively located at two ends of the blade battery opposite to each other along the length direction of the blade battery, and the first end, the positive electrode tab, the negative electrode tab and the second end are distributed in sequence along the length direction.

[0008] In some embodiments, the number of the positive electrode tabs and the number of the negative electrode tabs are both plural, and the plurality of positive electrode tabs are spaced apart along the length direction, and the plurality of negative electrode tabs are spaced apart along the length direction.

[0009] In some embodiments, the positive electrode tabs are distributed at equal intervals along the length direction, and the plurality of negative electrode tabs are distributed at equal intervals along the length direction.

[0010] In some embodiments, the length of the blade battery is L, the height of the blade battery is H, and H<150mm≤L<3500mm.

[0011] In some embodiments, the blade battery includes multiple positive electrode sheets and multiple negative electrode sheets, a negative electrode sheet is arranged between any two adjacent positive electrode sheets, and a positive electrode sheet is arranged between any two adjacent negative electrode sheets. The tabs of multiple positive electrode sheets are connected to form positive electrode tabs, and the tabs of multiple negative electrode sheets are connected to form negative electrode tabs. The number of positive electrode sheets is less than or equal to 150, and the number of negative electrode sheets is less than or equal to 150.

[0012] In some embodiments, the blade battery further includes a shell and a cover plate, the cover plate is disposed on the shell, the positive electrode sheet and the negative electrode sheet are installed in the shell, and the wall thickness of the shell is 0.05 mm to 4 mm.

[0013] In some embodiments, the cover plate is provided with a positive electrode column and a negative electrode column, the positive electrode tab is connected to the positive electrode column, the negative electrode tab is connected to the negative electrode column, and the shell is provided with an explosion-proof valve.

[0014] In a second aspect, an embodiment of the utility model provides a battery pack, which includes a bus and a plurality of blade batteries provided by any of the above embodiments, wherein the bus is electrically connected to the plurality of blade batteries.

[0015] In some embodiments, the number of positive electrode tabs or negative electrode tabs is N, 1≤N≤(Lh) / 2H, where h is the width of the bus, L is the length of the blade battery, and H is the height of the blade battery.

[0016] The blade battery and battery pack provided by the embodiment of the utility model include a positive pole ear and a negative pole ear, and the positive pole ear and the negative pole ear are located on the same side of the blade battery and are spaced apart. In this way, the positive pole ear and the negative pole ear are located on the same side of the blade battery, which helps to facilitate the wiring of the blade battery and helps to improve the wiring efficiency of the blade battery. In addition, the spaced distribution of the positive pole ear and the negative pole ear also helps to reduce the risk of mutual interference between the positive pole ear and the negative pole ear, which helps to ensure the normal operation of the blade battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the implementation modes of the present invention, the drawings required for use in the description of the implementation modes will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A partial structural schematic diagram of a blade battery provided in an embodiment of the utility model is shown.

[0019] Figure 2 A schematic structural diagram of a blade battery provided in an embodiment of the utility model is shown.

[0020] Figure 3 A schematic structural diagram of a blade battery provided in another embodiment of the utility model is shown.

[0021] Figure 4 A schematic structural diagram of a battery pack provided in an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] The positive electrode tab and the negative electrode tab of the blade battery in the related art are located on opposite sides of the blade battery, so that the wiring of the blade battery needs to be carried out from the opposite sides, which makes the wiring complicated and the wiring efficiency is low.

[0025] Please also read Figure 1 and Figure 2 The embodiment of the utility model provides a blade battery 10, which includes a positive pole tab 11 and a negative pole tab 12. The positive pole tab 11 and the negative pole tab 12 are located on the same side of the blade battery 10 and are spaced apart.

[0026] In this way, the positive electrode tab 11 and the negative electrode tab 12 are located on the same side of the blade battery 10, which helps to facilitate the wiring of the blade battery 10 and improve the wiring efficiency of the blade battery 10. In addition, the spacing between the positive electrode tab 11 and the negative electrode tab 12 also helps to reduce the risk of mutual interference between the positive electrode tab 11 and the negative electrode tab 12, which helps to ensure the normal operation of the blade battery 10.

[0027] For example, the positive electrode tab 11 and the negative electrode tab 12 can be located on one side of the length direction of the blade battery 10; for another example, the positive electrode tab 11 and the negative electrode tab 12 can be located on one side of the width direction of the blade battery 10, which helps to wire the blade battery 10 from the same side and helps to improve the wiring efficiency of the blade battery 10.

[0028] In some embodiments, the positive electrode tab 11 and the negative electrode tab 12 are spaced apart along the length direction of the blade battery 10. For example, the blade battery 10 may have a first end 17 and a second end 18, the first end 17 and the second end 18 are respectively located at two opposite ends of the blade battery 10 along the length direction of the blade battery 10, and the first end 17, the positive electrode tab 11, the negative electrode tab 12 and the second end 18 are sequentially distributed along the length direction of the blade battery 10.

[0029] In this way, the conduction of electrons in the blade battery 10 does not need to span the entire length of the blade battery 10 , which helps to reduce the ohmic internal resistance of the blade battery 10 , allowing the blade battery 10 to transmit current more efficiently, helping to reduce the energy loss of the blade battery 10 , thereby helping to increase the service life of the blade battery 10 .

[0030] In addition, the ohmic internal resistance of the blade battery 10 is reduced, which helps to enhance the energy storage and release capabilities of the blade battery 10 , thereby helping to improve the efficiency of the blade battery 10 .

[0031] In some embodiments, the number of the positive electrode tab 11 and the negative electrode tab 12 can be one or more, and the number of the positive electrode tab 11 and the negative electrode tab 12 are adapted to each other. For example, the number of the positive electrode tab 11 and the negative electrode tab 12 can both be one. For another example, the number of the positive electrode tab 11 and the negative electrode tab 12 can both be two, three, four, five or other numbers, which can be specifically set according to actual conditions.

[0032] Exemplarily, the length of the blade battery 10 is L. When the number of the positive electrode tab 11 and the negative electrode tab 12 is one, the distance between the positive electrode tab 11 and the first end 17 is L / 4, and the distance between the negative electrode tab 12 and the second end 18 is L / 4.

[0033] This helps reduce the distance between the positive electrode tab 11 and the negative electrode tab 12 , helps to better reduce the ohmic internal resistance of the blade battery 10 , and enables the blade battery 10 to transmit current more efficiently, thereby helping to better reduce the energy loss of the blade battery 10 .

[0034] The distance between the positive electrode tab 11 and the first end 17 and the distance between the negative electrode tab 12 and the second end 18 are allowed to be adaptively set within the allowable error range, and can be adaptively adjusted according to actual conditions.

[0035] In some embodiments, when the number of positive electrode tabs 11 and negative electrode tabs 12 is multiple, the multiple positive electrode tabs 11 can be distributed at intervals along the length direction of the blade battery 10, and the multiple negative electrode tabs 12 can be distributed at intervals along the length direction of the blade battery 10.

[0036] In this way, multiple positive pole tabs 11 can shunt the positive side of the blade battery 10, thereby helping to reduce the current of a single positive pole tab 11 and helping to reduce the heat generated at the positive pole tab 11. Multiple negative pole tabs 12 can shunt the negative side of the blade battery 10, thereby helping to reduce the current of a single negative pole tab 12 and helping to reduce the heat generated at the negative pole tab 12. Multiple positive pole tabs 11 and multiple negative pole tabs 12 help reduce the risk of overcurrent in the blade battery 10 and help to improve the reliability and safety of the blade battery 10.

[0037] In addition, multiple positive pole tabs 11 can dissipate heat for the positive side of the blade battery 10, so that the heat dissipation of a single positive pole tab 11 is accelerated, and multiple negative pole tabs 12 can dissipate heat for the negative side of the blade battery 10, so that the heat dissipation of a single negative pole tab 12 is accelerated. In this way, multiple positive pole tabs 11 and multiple negative pole tabs 12 help reduce the internal temperature difference of the blade battery 10, thereby helping to improve the rate performance of the blade battery 10, helping to shorten the charging time of the blade battery 10, and thus improving the cycle performance of the blade battery 10.

[0038] In some embodiments, multiple positive electrode tabs 11 are evenly spaced along the length direction, and multiple negative electrode tabs 12 are evenly spaced along the length direction. This helps to ensure that there is an appropriate spacing between the multiple positive electrode tabs 11 and the multiple negative electrode tabs 12, and also helps to facilitate the arrangement of the positive electrode tabs 11 and the negative electrode tabs 12.

[0039] In addition, the multiple positive electrode tabs 11 are evenly spaced along the length direction, and the multiple negative electrode tabs 12 are evenly spaced along the length direction, which helps to better balance the temperatures of the multiple positive electrode tabs 11 and the multiple negative electrode tabs 12, and helps to better reduce the internal temperature difference of the blade battery 10, thereby helping to better improve the rate performance of the blade battery 10.

[0040] Exemplarily, the length of the blade battery 10 is L. When the number of the positive pole tabs 11 and the negative pole tabs 12 are both two, the distance between one of the positive pole tabs 11 and the first end 17 is L / 6, and the distance between the other positive pole tab 11 and the first end 17 is L / 3, the distance between one of the negative pole tabs 12 and the second end 18 is L / 6, and the distance between the other negative pole tab 12 and the second end 18 is L / 3.

[0041] This helps to rationally arrange the positions of multiple positive pole tabs 11 and negative pole tabs 12 in the blade battery 10, and helps to better reduce the distance between the positive pole tabs 11 and the negative pole tabs 12, thereby better reducing the ohmic internal resistance of the blade battery 10 to more efficiently transmit current.

[0042] The spacing between the plurality of positive electrode tabs 11 and the first end 17 and the spacing between the plurality of negative electrode tabs 12 and the second end 18 are allowed to be adaptively set within the allowable error range, and can be adaptively adjusted according to actual conditions.

[0043] In some embodiments, the length of the blade battery 10 is L, the height of the blade battery 10 is H, H<150mm≤L<3500mm, which helps to ensure that the blade battery 10 has a suitable length L and height H. When the blade battery 10 is applied to a battery pack, it helps to improve the space utilization of the battery pack, help to expand the energy density of the battery pack, and enhance the endurance of the power battery pack.

[0044] Exemplarily, the length L of the blade battery 10 can be 150mm, 180mm, 200mm, 500mm, 800mm, 1000mm, 1300mm, 1800mm, 2500mm, 2800mm, 3400mm or any value greater than or equal to 150 and less than 3500, and the height H of the blade battery 10 can be 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm or any value greater than 0 and less than 150, and can be set according to actual conditions.

[0045] Doing so helps ensure that the blade battery 10 has a suitable length L and height H, helps ensure the efficient operation of the blade battery 10, helps reduce the risk of insufficient capacity of the blade battery 10 due to the length L and height H of the blade battery 10 being too small, and also helps reduce the risk of excessive size of the blade battery 10 due to the length L and height H of the blade battery 10 being too large.

[0046] In some embodiments, the blade battery 10 may include multiple positive electrode sheets 13 and multiple negative electrode sheets 14, a negative electrode sheet 14 is disposed between any two adjacent positive electrode sheets 13, and a positive electrode sheet 13 is disposed between any two adjacent negative electrode sheets 14. The tabs of the multiple positive electrode sheets 13 are connected to form a positive electrode tab 11, and the tabs of the multiple negative electrode sheets 14 are connected to form a negative electrode tab 12.

[0047] For example, the blade battery 10 may adopt a laminated structure, which helps to improve the energy density of the blade battery 10 and the stability of the internal structure of the blade battery 10. For another example, the blade battery 10 may adopt a winding structure, which helps to simplify the processing technology of the blade battery 10 and save manufacturing costs.

[0048] Among them, the positive electrode plate 13 is separated from the corresponding negative electrode plate 14 by a diaphragm to reduce the risk of short circuit between the positive electrode tab 11 and the negative electrode tab 12, thereby helping to ensure the normal operation of the blade battery 10.

[0049] In some embodiments, each positive electrode sheet 13 is laser-cut to form at least one tab along the length direction of the blade battery 10, and the tabs of multiple positive electrode sheets 13 are laser-welded or ultrasonically welded together to form a positive electrode tab 11 to ensure the normal operation of the positive side of the blade battery 10. Each negative electrode sheet 14 is laser-cut to form at least one tab along the length direction of the blade battery 10, and the tabs of multiple negative electrode sheets 14 are laser-welded or ultrasonically welded together to form a negative electrode tab 12 to ensure the normal operation of the negative side of the blade battery 10.

[0050] In some embodiments, the number of positive electrode plates 13 is less than or equal to 150, and the number of negative electrode plates 14 is less than or equal to 150. For example, the number of positive electrode plates 13 can be 60, 80, 90, 100, 120, 130, 150 or any value greater than 0 and less than or equal to 150, and the number of negative electrode plates 14 can be 60, 80, 90, 100, 120, 130, 150 or any value greater than 0 and less than or equal to 150. This helps to ensure that the blade battery 10 has sufficient width and helps to ensure that the blade battery 10 has sufficient capacity and volume.

[0051] Please join us Figure 1 and Figure 2 In some embodiments, the blade battery 10 may further include a housing 15 and a cover plate 16, wherein the cover plate 16 is covered on the housing 15, and the positive electrode sheet 13 and the negative electrode sheet 14 are installed in the housing 15. In this way, the housing 15 and the cover plate 16 can provide certain protection for the positive electrode sheet 13 and the negative electrode sheet 14, which helps to reduce the risk of the positive electrode sheet 13 and the negative electrode sheet 14 being exposed to the housing 15 and being damaged.

[0052] In some embodiments, the wall thickness of the shell 15 can be 0.05 mm to 4 mm, which helps to ensure that the shell 15 has an appropriate wall thickness and helps to ensure that the shell 15 has sufficient rigidity, thereby helping to ensure that the shell 15 can provide protection for the positive electrode plate 13 and the negative electrode plate 14.

[0053] Exemplarily, the wall thickness of the shell 15 can be 0.05mm, 0.5mm, 0.8mm, 1mm, 1.5mm, 1.8mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm or any value between two adjacent values ​​mentioned above, and can be set according to actual conditions.

[0054] This helps ensure that the shell 15 has an appropriate wall thickness, helps ensure that the shell 15 has sufficient rigidity, helps reduce the risk of insufficient rigidity of the shell 15 due to the shell 15 being too small, and also helps reduce the risk of increasing the manufacturing cost of the shell 15 due to the shell 15 being too large.

[0055] The appropriate wall thickness of the shell 15 can be selected according to the length, load-bearing capacity, etc. of the blade battery 10, and can be set specifically according to actual conditions.

[0056] In some embodiments, the cover plate 16 may be provided with a positive pole 161 and a negative pole 162 , the positive pole tab 11 is connected to the positive pole 161 , the negative pole tab 12 is connected to the negative pole 162 , and the shell 15 is provided with an explosion-proof valve 151 .

[0057] In this way, the explosion-proof valve 151 is arranged on the shell 15, so that the explosion-proof valve 151 and the positive electrode tab 11 and the negative electrode tab 12 can be respectively located on different sides of the blade battery 10, which helps to achieve thermal and electrical separation of the blade battery 10. Then, when the blade battery 10 thermally runs away, the high-temperature gas and the ejecta can be discharged from the side away from the positive electrode tab 11 and the negative electrode tab 12, which helps to reduce the risk of high-temperature gas and ejecta damaging the positive electrode tab 11, the negative electrode tab 12 and the components in the shell 15, thereby helping to reduce the risk of failure of the blade battery 10.

[0058] In addition, the explosion-proof valve 151 and the positive electrode tab 11 and the negative electrode tab 12 are located on opposite sides of the blade battery 10, which also helps to reduce the risk of damage to the positive electrode tab 11 and the negative electrode tab 12 by high-temperature gases and jets, and facilitates the subsequent recycling of the positive electrode tab 11 and the negative electrode tab 12.

[0059] In some embodiments, the shell 15 may include a connected side wall 152 and a bottom wall 153, and at least one of the side wall 152 and the bottom wall 153 is provided with an explosion-proof valve 151. For example, the side wall 152 may be provided with one, two, three, or other number of explosion-proof valves 151, and for another example, the bottom wall 153 may be provided with one, two, three, or other number of explosion-proof valves 151. For another example, both the side wall 152 and the bottom wall 153 may be provided with one, two, three, or other number of explosion-proof valves 151. The specific settings can be made according to actual conditions.

[0060] In this way, when the shell 15 is provided with a plurality of explosion-proof valves 151 , the plurality of explosion-proof valves 151 help to improve the exhaust efficiency of the blade battery 10 when thermal runaway occurs, thereby helping to reduce the risk of the blade battery 10 exploding due to thermal runaway.

[0061] See also Figure 3 In some embodiments, the shell 15 may also be provided with a handle 154, and the handle 154 may be located at both ends of the length direction of the shell 15. For example, the handle 154 may be provided on the side wall 152. Then, when the blade battery 10 needs to be installed and fixed to the battery pack, the handle 154 may meet the requirements of disassembly and assembly of the blade battery 10, thereby helping to improve the disassembly and assembly efficiency of the blade battery 10.

[0062] In this way, when the blade battery 10 needs to be installed and fixed in the battery pack, the blade battery 10 can be installed and fixed by the handle 154, and the blade battery 10 does not need to be completely glued, which helps to improve the efficiency of disassembly and assembly of the blade battery 10. In addition, when a blade battery 10 in the battery pack fails, the handle 154 can be used to replace the problematic blade battery 10, which helps to reduce the cost of maintenance.

[0063] When the side wall 152 is provided with a handle 154 , a plurality of explosion-proof valves 151 can be adaptively disposed on the bottom wall 153 to reduce the risk of mutual interference between the explosion-proof valves 151 and the handle 154 during operation.

[0064] See also Figure 4 The present utility model embodiment provides a battery pack 100, and the battery pack 100 may be a power battery pack, for example, the battery pack 100 may be a lithium-ion battery pack, a nickel-metal hydride battery pack, etc. In other embodiments, the type of the battery pack 100 may also be other.

[0065] In some embodiments, the battery pack 100 includes a bus bar 20 and a plurality of blade batteries 10 provided in any of the above embodiments, and the bus bar 20 is electrically connected to the plurality of blade batteries 10. In this way, the bus bar 20 can connect the plurality of blade batteries 10, and the bus bar 20 helps the battery pack 100 to better transmit current, and helps to improve the stability and safety of the circuit of the battery pack 100.

[0066] In some embodiments, the number of positive electrode tabs 11 or the number of negative electrode tabs 12 is N, 1≤N≤(Lh) / 2H, where h is the width of the bus 20, L is the length of the blade battery 10, and H is the height of the blade battery 10.

[0067] In this way, the number of positive pole tabs 11 or the number of negative pole tabs 12 can be adaptively set according to the width of the bus 20, the length of the blade battery 10, and the height of the blade battery 10, which helps to rationally arrange the positions of multiple blade batteries 10 and the bus 20, and helps to better arrange the structure of the battery pack 10 to more efficiently transfer current.

[0068] In summary, the blade battery 10 and the battery pack 100 provided by the embodiment of the utility model, the blade battery 10 includes a positive pole tab 11 and a negative pole tab 12, and the positive pole tab 11 and the negative pole tab 12 are located on the same side of the blade battery 10 and are spaced apart. In this way, the positive pole tab 11 and the negative pole tab 12 are located on the same side of the blade battery 10, which helps to facilitate the wiring of the blade battery 10 and helps to improve the wiring efficiency of the blade battery 10. In addition, the spaced distribution of the positive pole tab 11 and the negative pole tab 12 also helps to reduce the risk of mutual interference between the positive pole tab 11 and the negative pole tab 12, which helps to ensure the normal operation of the blade battery 10.

[0069] In the present invention, unless otherwise clearly specified or limited, the terms "assembly" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements, it can be only surface contact, or it can be connected through the surface contact of an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as specific or special structures. The description of the term "some embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present utility model, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present utility model and the features of different embodiments or examples without contradiction.

[0071] The above implementation modes are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned implementation modes, a person skilled in the art should understand that the technical solutions described in the aforementioned implementation modes can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various implementation modes of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A blade battery, characterized in that: The blade battery has a first end and a second end, the first end and the second end are respectively located at two ends of the blade battery opposite to each other along the length direction of the blade battery, the blade battery includes a positive pole ear and a negative pole ear, the positive pole ear and the negative pole ear are located on the same side of the blade battery and are distributed at intervals, the first end, the positive pole ear, the negative pole ear and the second end are distributed in sequence along the length direction; the number of the positive pole ear and the number of the negative pole ears are both multiple, the multiple positive pole ears are distributed at intervals along the length direction, and the multiple negative pole ears are distributed at intervals along the length direction.

2. The blade battery according to claim 1, characterized in that: The plurality of positive electrode tabs are distributed at equal intervals along the length direction, and the plurality of negative electrode tabs are distributed at equal intervals along the length direction.

3. The blade battery according to claim 1, characterized in that: The length of the blade battery is L, the height of the blade battery is H, and H<150mm≤L<3500mm.

4. The blade battery according to claim 1, characterized in that: The blade battery includes multiple positive electrode sheets and multiple negative electrode sheets. One negative electrode sheet is arranged between any two adjacent positive electrode sheets, and one positive electrode sheet is arranged between any two adjacent negative electrode sheets. The tabs of multiple positive electrode sheets are connected to form the positive electrode tabs, and the tabs of multiple negative electrode sheets are connected to form the negative electrode tabs. The number of positive electrode sheets is less than or equal to 150, and the number of negative electrode sheets is less than or equal to 150.

5. The blade battery according to claim 4, characterized in that: The blade battery also includes a shell and a cover plate, the cover plate is covered on the shell, the positive electrode sheet and the negative electrode sheet are installed in the shell, and the wall thickness of the shell is 0.05 mm to 4 mm.

6. The blade battery according to claim 5, characterized in that: The cover plate is provided with a positive pole column and a negative pole column, the positive pole tab is connected to the positive pole column, the negative pole tab is connected to the negative pole column, and the shell is provided with an explosion-proof valve.

7. A battery pack, characterized in that: include: Busbar; as well as According to any one of claims 1 to 6, the bus is electrically connected to the plurality of blade batteries.

8. The battery pack according to claim 7, characterized in that: The number of the positive electrode tabs or the negative electrode tabs is N, 1≤N≤(Lh) / 2H, wherein h is the width of the bus, L is the length of the blade battery, and H is the height of the blade battery.

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