Blade battery

Abstract

The utility model provides a blade battery which comprises a battery shell and a pole roll, the pole roll is arranged in the battery shell, and the battery shell is provided with a first side and a second side which are oppositely arranged; the at least two pole column pairs are connected with the pole roll, and each pole column pair in the at least two pole column pairs comprises a positive pole column and a negative pole column which are arranged at an interval; wherein one of the at least two pole pairs is arranged on the first side, and the other one of the at least two pole pairs is arranged on the second side. By adopting the technical scheme provided by the utility model, the technical problem that the internal resistance of a blade battery in the prior art is relatively large can be solved.

Description

Technical Field

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

[0002] At present, blade batteries are a type of square battery cells that innovate the battery packaging structure. Because of their slender shape and blade-like shape, they are called blade batteries. At the same time, blade batteries have high volume density and energy density, good safety, and can pass the needle puncture test without catching fire or exploding. The installed capacity has increased significantly in recent years.

[0003] However, the positive and negative poles of the blade battery are usually located on both sides of the opening of the battery shell. When the battery cells are connected in series and parallel, a bus needs to be designed from both ends of the blade battery. When multiple batteries are connected in series and parallel, the internal resistance of the battery system is large, which will correspondingly increase the internal resistance of voltage collection. Utility Model Content

[0004] The main purpose of the utility model is to provide a blade battery to solve the technical problem of large internal resistance of blade batteries in the prior art.

[0005] In order to achieve the above object, the utility model provides a blade battery, comprising:

[0006] A battery housing and a pole coil, wherein the pole coil is disposed in the battery housing, and the battery housing has a first side and a second side disposed opposite to each other;

[0007] At least two pole pairs, both of which are connected to the pole coil, and each of the at least two pole pairs includes a positive pole and a negative pole arranged at intervals;

[0008] Among them, one of at least two pole pairs is arranged on the first side, and the other of at least two pole pairs is arranged on the second side.

[0009] Further, the battery housing is a strip structure, the strip structure extends along a preset direction, and the first side and the second side are respectively arranged on both sides of the battery housing along the preset direction; or,

[0010] The battery housing is a rectangular parallelepiped structure, and the first side and the second side are respectively arranged on two sides of the battery housing along the length direction of the rectangular parallelepiped structure.

[0011] Furthermore, the number of pole pairs located on the first side is equal to the number of pole pairs located on the second side, the pole pairs located on the first side are arranged in one-to-one correspondence with the pole pairs located on the second side, and each pole pair located on the first side is arranged opposite to the corresponding pole pair located on the second side.

[0012] Further, the positive pole of one of the at least two pole pairs is arranged opposite to the positive pole of the other of the at least two pole pairs, and the negative pole of one of the at least two pole pairs is arranged opposite to the negative pole of the other of the at least two pole pairs; or,

[0013] The positive pole of one of the at least two pole pairs is arranged opposite to the negative pole of the other of the at least two pole pairs, and the negative pole of one of the at least two pole pairs is arranged opposite to the positive pole of one of the at least two pole pairs.

[0014] Further, the polar volume includes:

[0015] A positive electrode plate, on which at least two positive electrode tabs are arranged, the at least two positive electrode tabs are arranged in one-to-one correspondence with at least two positive electrode posts, and each positive electrode tab is connected to a corresponding positive electrode post;

[0016] The negative electrode plate is provided with at least two negative electrode tabs, the at least two negative electrode tabs are provided in one-to-one correspondence with at least two negative electrode posts, and each negative electrode tab is connected to the corresponding negative electrode post.

[0017] Further, the positive electrode tab has a first end and a second end that are arranged opposite to each other, the first end is flush with the edge of the positive electrode sheet, and the second end is provided with a chamfer structure; and / or,

[0018] The negative electrode tab has a third end and a fourth end that are arranged opposite to each other, the third end is flush with the edge of the negative electrode plate, and the fourth end is provided with a chamfered structure.

[0019] Further, the first side has a first mounting opening, the blade battery also includes a first cover plate, the first cover plate is installed at the first mounting opening and blocks the first mounting opening, and at least one of the two pole pairs is installed on the first cover plate and is located on a side of the first cover plate away from the inner cavity of the battery housing; and / or,

[0020] The second side has a second mounting opening, and the blade battery also includes a second cover plate, which is installed at the second mounting opening and blocks the second mounting opening. The other of at least two pole pairs is installed on the second cover plate and is located on the side of the second cover plate away from the inner cavity of the battery casing.

[0021] Furthermore, the positive electrode column and / or the negative electrode column include interconnected connecting plates and bus bars, the connecting plates are arranged on the first cover plate and / or the second cover plate, the connecting plates are located on the side of the first cover plate and / or the second cover plate away from the inner cavity of the battery casing, and the bus bars are arranged on the side of the connecting plates away from the first cover plate and / or the side of the second cover plate.

[0022] Further, the battery housing has a first mounting side surface and a second mounting side surface that are arranged opposite to each other, the first mounting side surface is provided with a plurality of first mounting protrusions arranged in sequence, and a first mounting groove is formed between two adjacent first mounting protrusions; the second mounting side surface is provided with a plurality of second mounting protrusions arranged in sequence, and a second mounting groove is formed between two adjacent second mounting protrusions, and the plurality of second mounting protrusions are staggered with the plurality of first mounting protrusions;

[0023] Wherein, each second mounting protrusion is arranged correspondingly to the corresponding first mounting groove, so that the second mounting protrusion on one battery housing is arranged in the first mounting groove on the adjacent battery housing; and / or,

[0024] Each first mounting protrusion is arranged correspondingly to the corresponding second mounting groove, so that the first mounting protrusion on one battery housing is clamped in the second mounting groove of the adjacent battery housing.

[0025] Furthermore, the battery housing is a rectangular parallelepiped structure, the width of the battery housing is B, B ≥ 80 mm; and / or,

[0026] The battery shell has a thickness of S, S ≥ 8 mm; and / or,

[0027] The height of the first mounting protrusion is t1, t1 ≥ 0.5 mm; and / or,

[0028] The height of the second mounting protrusion is t2, and t2≥0.5 mm.

[0029] The technical solution of the utility model is applied, by setting at least two pole pairs, at least two pole pairs are connected to the pole coil, each pole pair in the at least two pole pairs includes a positive pole and a negative pole arranged at intervals; and one of the at least two pole pairs is arranged on the first side, and the other of the at least two pole pairs is arranged on the second side. In this way, the circuit between a pole pair located on the first side and the circuit between another pole pair located on the second side can be similar to a U shape, and the lengths of the two long sides of the U shape are approximately half the length from the first side to the second side, thereby reducing the internal resistance of the blade battery. In addition, when collecting the voltage and temperature of the blade battery, it is only necessary to collect on the same side, which reduces the span of the voltage collection point, reduces the internal resistance of the voltage collection, and improves the collection accuracy and collection reliability. At the same time, the blade battery has a simple structure, low cost, and good processability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0031] Figure 1 A front view of a blade battery provided according to an embodiment of the utility model is shown;

[0032] Figure 2 A left side view of a blade battery provided according to an embodiment of the utility model is shown;

[0033] Figure 3 A right side view of a blade battery provided according to an embodiment of the utility model is shown;

[0034] Figure 4 A top view of a blade battery provided according to an embodiment of the utility model is shown;

[0035] Figure 5 A side view of a battery housing provided according to an embodiment of the utility model is shown;

[0036] Figure 6 A partial structural schematic diagram of a battery housing provided according to an embodiment of the utility model is shown;

[0037] Figure 7 A schematic structural diagram of a first cover plate provided according to an embodiment of the utility model is shown;

[0038] Figure 8 A schematic structural diagram of a pole coil provided according to an embodiment of the utility model is shown;

[0039] Fig. 9 Another schematic structural diagram of a pole coil provided according to an embodiment of the utility model is shown;

[0040] Fig.10 A side view of a pole roll provided according to an embodiment of the present invention is shown;

[0041] Fig.11 A schematic structural diagram of a positive electrode sheet provided according to an embodiment of the utility model is shown;

[0042] Fig.12 A schematic structural diagram of a negative electrode plate provided according to an embodiment of the utility model is shown.

[0043] The above drawings include the following reference numerals:

[0044] 10. battery housing; 11. first side; 12. second side; 13. first mounting side; 14. second mounting side; 15. first mounting protrusion; 16. second mounting protrusion;

[0045] 20, pole coil; 21, positive pole piece; 22, positive pole ear; 221, first end; 222, second end; 23, negative pole piece; 24, negative pole ear; 241, third end; 242, fourth end;

[0046] 30. Pole pair; 31. Positive pole; 32. Negative pole; 33. Connecting plate; 34. Busbar;

[0047] 41. a first cover plate; 42. a second cover plate;

[0048] 50. Explosion-proof valve. DETAILED DESCRIPTION

[0049] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0050] like Figures 1 to 12 As shown, an embodiment of the utility model provides a blade battery, which includes a battery housing 10, a pole coil 20 and at least two pole pairs 30, the pole coil 20 is arranged in the battery housing 10, and the battery housing 10 has a first side 11 and a second side 12 arranged opposite to each other. At least two pole pairs 30, at least two pole pairs 30 are connected to the pole coil 20, and each pole pair 30 of the at least two pole pairs 30 includes a positive pole 31 and a negative pole 32 arranged at intervals, wherein one of the at least two pole pairs 30 is arranged on the first side 11, and the other of the at least two pole pairs 30 is arranged on the second side 12.

[0051] By using the blade battery provided in this embodiment, the circuit between a pole pair 30 (positive pole 31 to negative pole 32) located on the first side 11 and the circuit between another pole pair 30 (positive pole 31 to negative pole 32) located on the second side 12 can be similar to a U shape, and the lengths of the two long sides of the U shape are approximately half the length from the first side 11 to the second side 12, thereby reducing the travel of the charge and effectively reducing the internal resistance of the blade battery. In addition, when collecting the voltage and temperature of the blade battery, it is only necessary to collect on the same side, which reduces the span of the voltage collection points, reduces the internal resistance of the voltage collection, and improves the collection accuracy and collection reliability. At the same time, the blade battery has a simple structure, low cost, and good processability. Therefore, the blade battery provided in this embodiment can solve the technical problem of large internal resistance of blade batteries in the prior art.

[0052] In one embodiment, the battery housing 10 is a strip structure, the strip structure extends in a preset direction, and the first side 11 and the second side 12 are respectively arranged on both sides of the battery housing 10 in the preset direction. With such a structural arrangement, it is possible to better reduce the situation where the internal resistance of the blade battery is too large due to the excessive extension direction of the strip structure.

[0053] In another embodiment, the battery housing 10 is a rectangular parallelepiped structure, and the first side 11 and the second side 12 are respectively arranged on both sides of the battery housing 10 along the length direction of the rectangular parallelepiped structure. With such a structural arrangement, it is convenient to better reduce the situation where the internal resistance of the blade battery is too large due to the excessive length direction of the rectangular parallelepiped structure.

[0054] In this embodiment, the number of pole pairs 30 located on the first side 11 is equal to the number of pole pairs 30 located on the second side 12, the pole pairs 30 located on the first side 11 are arranged one-to-one with the pole pairs 30 located on the second side 12, and each pole pair 30 located on the first side 11 is arranged opposite to the corresponding pole pair 30 located on the second side 12. In this way, it is convenient to better optimize the layout of the pole pairs 30 on both sides, and it is also convenient to better connect the positive pole 31 and the negative pole 32 of the pole pair 30 with the outside, and it can also effectively reduce the situation where the internal resistance inside the blade battery is too large.

[0055] Specifically, the positive pole 31 of one of the at least two pole pairs 30 is arranged opposite to the positive pole 31 of the other of the at least two pole pairs 30, and the negative pole 32 of one of the at least two pole pairs 30 is arranged opposite to the negative pole 32 of the other of the at least two pole pairs 30. With such a structural layout, it is convenient to optimize the positions of the positive poles 31 and the negative poles 32 of the pole pairs 30 on both sides, so as to better reduce the internal resistance inside the blade battery, and effectively ensure the electrical connection relationship between the positive poles 31 and the negative poles 32 on both sides. Specifically, the above arrangement can adopt a symmetrical arrangement of the positive pole 31 on the first side 11 and the positive pole pair 30 on the second side 12, and a symmetrical arrangement of the negative pole 32 on the first side 11 and the negative pole pair 30 on the second side 12.

[0056] Alternatively, the positive pole 31 of one of the at least two pole pairs 30 is arranged opposite to the negative pole 32 of the other of the at least two pole pairs 30, and the negative pole 32 of one of the at least two pole pairs 30 is arranged opposite to the positive pole 31 of one of the at least two pole pairs 30. With such a structural layout, it is convenient to optimize the positions of the positive poles 31 and the negative poles 32 of the pole pairs 30 on both sides, so as to better reduce the internal resistance inside the blade battery, and effectively ensure the electrical connection relationship between the positive poles 31 and the negative poles 32 on both sides. Specifically, the above arrangement can adopt a symmetrical arrangement of the positive pole 31 on the first side 11 and the negative pole pair 30 on the second side 12, and a symmetrical arrangement of the negative pole 32 on the first side 11 and the positive pole pair 30 on the second side 12.

[0057] In this embodiment, the pole roll 20 includes a positive pole sheet 21 and a negative pole sheet 23. The positive pole sheet 21 is provided with at least two positive pole tabs 22, and the at least two positive pole tabs 22 are provided in one-to-one correspondence with at least two positive pole posts 31, and each positive pole tab 22 is connected to the corresponding positive pole post 31. The negative pole sheet 23 is provided with at least two negative pole tabs 24, and the at least two negative pole tabs 24 are provided in one-to-one correspondence with at least two negative pole posts 32, and each negative pole tab 24 is connected to the corresponding negative pole post 32. With such a structural arrangement, it is convenient to optimize the connection mode between the pole roll 20 and the two pole posts 30, and optimize the structural layout of the pole roll 20.

[0058] Specifically, the positive electrode tab 22 and the negative electrode tab 24 respectively use the same current collector as the corresponding electrode sheet, and the current collector material can be copper foil or aluminum foil. Specifically, a separator is provided between the positive electrode sheet 21 and the negative electrode sheet 23, and the positive electrode sheet 21 and the negative electrode sheet 23 are stacked. Generally, the number of positive electrode sheets 21 in the electrode roll 20 is N, the number of negative electrode sheets 23 is M, and the relationship between the number of positive electrode sheets 21 and the number of negative electrode sheets 23 is N-1=M.

[0059] Specifically, the positive electrode tab 22 has a first end 221 and a second end 222 that are arranged opposite to each other, the first end 221 is flush with the edge of the positive electrode sheet 21, and the second end 222 is provided with a chamfered structure. With such a structural setting, it is convenient to weaken the sharp corner setting at the second end 222, facilitate smooth transition, and facilitate stacking.

[0060] Specifically, the chamfered structure may be a rounded structure, and the radius of the rounded structure is greater than or equal to 2 mm.

[0061] Specifically, the negative electrode tab 24 has a third end 241 and a fourth end 242 that are arranged opposite to each other, the third end 241 is flush with the edge of the negative electrode plate 23, and the fourth end 242 is provided with a chamfer structure. In this way, the sharp corner setting at the fourth end 242 can be weakened, which facilitates smooth transition and stacking.

[0062] In this embodiment, the first side 11 has a first mounting opening, and the blade battery further includes a first cover plate 41, which is mounted at the first mounting opening and blocks the first mounting opening, and at least one of the two pole pairs 30 is mounted on the first cover plate 41 and is located on a side of the first cover plate 41 away from the inner cavity of the battery housing 10. In this way, it is easy to install the pole pair 30 on the first side 11, improve the installation stability of the pole pair 30 on the first side 11, facilitate installation, simple structure, and easy operation.

[0063] Specifically, the second side 12 has a second mounting opening, and the blade battery further includes a second cover plate 42, which is mounted at the second mounting opening and blocks the second mounting opening, and the other of the at least two pole pairs 30 is mounted on the second cover plate 42 and is located on a side of the second cover plate 42 away from the inner cavity of the battery housing 10. In this way, it is easy to install the pole pair 30 on the second side 12, improve the installation stability of the pole pair 30 on the second side 12, facilitate installation, simple structure, and easy operation.

[0064] In this embodiment, the positive electrode column 31 and / or the negative electrode column 32 include a connecting plate 33 and a bus bar 34 connected to each other, the connecting plate 33 is arranged on the first cover plate 41 and / or the second cover plate 42, the connecting plate 33 is located on the side of the first cover plate 41 and / or the second cover plate 42 away from the inner cavity of the battery housing 10, and the bus bar 34 is arranged on the side of the connecting plate 33 away from the first cover plate 41 and / or the side of the second cover plate 42. With such a structural arrangement, the structure is simple, easy to connect and install, easy to perform stable busing, and easy to be electrically connected to an external structure.

[0065] Specifically, the battery housing 10 has a first mounting side 13 and a second mounting side 14 that are relatively arranged. The first mounting side 13 is provided with a plurality of first mounting protrusions 15 arranged in sequence, and a first mounting groove is formed between two adjacent first mounting protrusions 15; the second mounting side 14 is provided with a plurality of second mounting protrusions 16 arranged in sequence, and a second mounting groove is formed between two adjacent second mounting protrusions 16. The plurality of second mounting protrusions 16 are staggered with the plurality of first mounting protrusions 15.

[0066] Among them, each second mounting protrusion 16 is arranged correspondingly to the corresponding first mounting groove, so that the second mounting protrusion 16 on one battery housing 10 is arranged in the first mounting groove on the adjacent battery housing 10. In this way, multiple blade batteries can be stacked and assembled, and the position between two adjacent blade batteries can be limited, thereby improving the installation stability between multiple blade batteries.

[0067] Specifically, each first mounting protrusion 15 is arranged correspondingly to the corresponding second mounting groove, so that the first mounting protrusion 15 on one battery housing 10 is arranged in the second mounting groove of the adjacent battery housing 10. Such a structural arrangement is adopted to facilitate stacking and assembling of multiple blade batteries, and to limit the position between two adjacent blade batteries, thereby improving the installation stability between multiple blade batteries.

[0068] In this embodiment, the width L1 of the first mounting protrusion 15 can be smaller than or equal to the width of the second mounting groove, and the width L2 of the second mounting protrusion 16 can be smaller than or equal to the width of the first mounting groove.

[0069] Specifically, the battery housing 10 is a rectangular parallelepiped structure, the width of the battery housing 10 is B, B≥80 mm, and the thickness of the battery housing 10 is S, S≥8 mm.

[0070] Specifically, the height of the first mounting protrusion 15 is t1, t1≥0.5mm; the height of the second mounting protrusion 16 is t2, t2≥0.5mm. In this way, the arrangement stability of multiple blade batteries when stacked can be effectively ensured, thereby improving the overall structural stability of the battery pack composed of multiple blade batteries.

[0071] In this embodiment, an explosion-proof valve 50 is further provided on the battery housing 10 , and the explosion-proof valve 50 may be provided on one side of the battery housing 10 in the width direction.

[0072] From the above description, it can be seen that the above-mentioned embodiments of the utility model achieve the following technical effects: a pair of poles are respectively arranged on both sides of the battery shell, so that when the voltage and temperature of the pole coil in the battery shell are collected, it is only necessary to collect through the positive pole and the negative pole located on the same side of the battery shell, so that the span of the voltage collection point is small, the internal resistance of the voltage collection is reduced, the voltage collection accuracy is greatly increased, and the collection harness is simplified, which has a positive effect on improving the battery collection reliability, reducing the battery pack cost, and increasing the energy density, thereby solving the problem of large internal resistance and large span of voltage collection points of the blade battery in the prior art, resulting in low battery collection reliability; at the same time, the blade battery has a simple structure, low cost and good processability.

[0073] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0074] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0075] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0076] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0077] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A blade battery, characterized in that: include: A battery housing (10) and a pole coil (20), wherein the pole coil (20) is arranged in the battery housing (10), and the battery housing (10) has a first side (11) and a second side (12) arranged opposite to each other; At least two pole pairs (30), each of the at least two pole pairs (30) being connected to the pole coil (20), each pole pair (30) in the at least two pole pairs (30) comprising a positive pole (31) and a negative pole (32) arranged at intervals; One of the at least two pole pairs (30) is arranged on the first side (11), and the other of the at least two pole pairs (30) is arranged on the second side (12).

2. The blade battery according to claim 1, characterized in that: The battery housing (10) is a strip-shaped structure, the strip-shaped structure extends along a preset direction, and the first side (11) and the second side (12) are respectively arranged on two sides of the battery housing (10) along the preset direction; or, The battery housing (10) is a rectangular parallelepiped structure, and the first side (11) and the second side (12) are respectively arranged on two sides of the battery housing (10) along the length direction of the rectangular parallelepiped structure.

3. The blade battery according to claim 1, characterized in that: The number of the pole pairs (30) located on the first side (11) is equal to the number of the pole pairs (30) located on the second side (12); the pole pairs (30) located on the first side (11) and the pole pairs (30) located on the second side (12) are arranged in a one-to-one correspondence; and each pole pair (30) located on the first side (11) is arranged opposite to a corresponding pole pair (30) located on the second side (12).

4. The blade battery according to claim 3, characterized in that: The positive pole (31) of one of the at least two pole pairs (30) is arranged opposite to the positive pole (31) of the other of the at least two pole pairs (30), and the negative pole (32) of one of the at least two pole pairs (30) is arranged opposite to the negative pole (32) of the other of the at least two pole pairs (30); or, The positive pole (31) of one of the at least two pole pairs (30) is arranged opposite to the negative pole (32) of the other of the at least two pole pairs (30), and the negative pole (32) of one of the at least two pole pairs (30) is arranged opposite to the positive pole (31) of one of the at least two pole pairs (30).

5. The blade battery according to any one of claims 1 to 4, characterized in that: The pole coil (20) comprises: A positive electrode sheet (21), wherein at least two positive electrode tabs (22) are arranged on the positive electrode sheet (21), the at least two positive electrode tabs (22) are arranged in one-to-one correspondence with at least two positive electrode posts (31), and each positive electrode tab (22) is connected to a corresponding positive electrode post (31); A negative electrode plate (23), wherein at least two negative electrode tabs (24) are arranged on the negative electrode plate (23), and the at least two negative electrode tabs (24) are arranged in a one-to-one correspondence with at least two negative electrode posts (32), and each negative electrode tab (24) is connected to the corresponding negative electrode post (32).

6. The blade battery according to claim 5, characterized in that: The positive electrode tab (22) has a first end (221) and a second end (222) that are arranged opposite to each other, the first end (221) is flush with the edge of the positive electrode plate (21), and the second end (222) is provided with a chamfer structure; and / or, The negative electrode tab (24) has a third end (241) and a fourth end (242) which are arranged opposite to each other, the third end (241) is flush with the edge of the negative electrode plate (23), and the fourth end (242) is provided with a chamfered structure.

7. The blade battery according to any one of claims 1 to 4, characterized in that: The first side (11) has a first mounting opening, the blade battery further comprises a first cover plate (41), the first cover plate (41) is mounted at the first mounting opening and blocks the first mounting opening, one of the at least two pole pairs (30) is mounted on the first cover plate (41) and is located on a side of the first cover plate (41) away from the inner cavity of the battery housing (10); and / or, The second side (12) has a second mounting opening, and the blade battery also includes a second cover plate (42), which is installed at the second mounting opening and blocks the second mounting opening, and the other of the at least two pole pairs (30) is installed on the second cover plate (42) and is located on a side of the second cover plate (42) away from the inner cavity of the battery housing (10).

8. The blade battery according to claim 7, characterized in that: The positive electrode column (31) and / or the negative electrode column (32) comprises a connecting plate (33) and a busbar (34) connected to each other, the connecting plate (33) being arranged on the first cover plate (41) and / or the second cover plate (42), the connecting plate (33) being located on a side of the first cover plate (41) and / or the second cover plate (42) away from the inner cavity of the battery housing (10), and the busbar (34) being arranged on a side of the connecting plate (33) away from the first cover plate (41) and / or the second cover plate (42).

9. The blade battery according to any one of claims 1 to 4, characterized in that: The battery housing (10) has a first mounting side surface (13) and a second mounting side surface (14) which are arranged opposite to each other; the first mounting side surface (13) is provided with a plurality of first mounting protrusions (15) which are arranged in sequence, and a first mounting groove is formed between two adjacent first mounting protrusions (15); the second mounting side surface (14) is provided with a plurality of second mounting protrusions (16) which are arranged in sequence, and a second mounting groove is formed between two adjacent second mounting protrusions (16); the plurality of second mounting protrusions (16) and the plurality of first mounting protrusions (15) are arranged in a staggered manner; wherein each of the second mounting protrusions (16) is arranged correspondingly to the corresponding first mounting groove, so that the second mounting protrusion (16) on one battery housing (10) is arranged in the first mounting groove on the adjacent battery housing (10); and / or, Each of the first mounting protrusions (15) is arranged correspondingly to the corresponding second mounting groove, so that the first mounting protrusion (15) on one battery housing (10) is arranged in the second mounting groove of an adjacent battery housing (10).

10. The blade battery according to claim 9, characterized in that: The battery housing (10) is a rectangular parallelepiped structure, and the width of the battery housing (10) is B, where B is ≥ 80 mm; and / or, The battery housing (10) has a thickness S, S ≥ 8 mm; and / or, The height of the first mounting protrusion (15) is t1, t1≥0.5mm; and / or, The height of the second mounting protrusion (16) is t2, and t2≥0.5 mm.

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