Single battery and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a single battery and a battery pack, the single battery comprises an electrode assembly, the electrode assembly comprises a main body part, a positive pole lug, a negative pole lug and an isolation belt, and the main body part is provided with a first end face in a third direction; the positive pole lug and the negative pole lug are arranged on the first end surface and are electrically connected with the main body part; the positive pole lug is provided with a first bending part, the projection of the first bending part on the first end surface along the third direction is a first isolation region, the negative pole lug is provided with a second bending part, the projection of the second bending part on the first end surface along the third direction is a second isolation region, and the second isolation region and the first isolation region are arranged at an interval; the isolation belt is arranged on the main body part; the isolation strip is insulated from the positive pole lug, the negative pole lug and the main body part; and the isolation strip covers at least one part of the first isolation region and at least one part of the second isolation region. The isolation strip provides insulation and isolation effects and is also used as a buffer part to prevent the tab from being inversely inserted into the main body part to cause short circuit.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a single cell battery and a battery pack. Background Technology

[0002] In existing battery structures, the electrode assembly includes a main body and tabs on the main body. The electrode assembly is welded to the terminals on the top cover via the tabs. During assembly, the tabs of the electrode assembly are first welded to the terminals on the top cover, and then the top cover is placed on the housing and sealed. However, when the top cover is connected to the housing and sealed, the top cover presses down on the tabs via the terminals. This may cause the tabs to bend during the pressing process and eventually insert upside down into the main body. This not only easily results in defective products but also poses safety hazards for subsequent testing and use. Utility Model Content

[0003] The purpose of this utility model is to provide a single battery and battery pack to solve the problem in the prior art where the tabs are inserted upside down after the top cover is pressed down, which can easily lead to safety hazards.

[0004] To achieve the above objectives, this utility model provides a technical solution for a single-cell battery:

[0005] A single cell, having intersecting first, second, and third directions, includes an electrode assembly comprising:

[0006] The main body has a first end face in the direction of the third party;

[0007] Both a positive electrode tab and a negative electrode tab are disposed on the first end face and electrically connected to the main body; the positive electrode tab has a first bending portion, and the projection of the first bending portion along the third direction on the first end face forms a first isolation area; the negative electrode tab has a second bending portion, and the projection of the second bending portion along the third direction on the first end face forms a second isolation area; the second isolation area is spaced apart from the first isolation area.

[0008] An isolation strip is disposed on the main body; the isolation strip is insulated from the positive electrode tab, the negative electrode tab and the main body, and the isolation strip covers at least a portion of the first isolation area and at least a portion of the second isolation area.

[0009] Furthermore, there are two positive electrode tabs, which are spaced apart and aligned in the second direction, and the first bending portion bends along the second direction in a direction away from each other.

[0010] The negative electrode tabs are provided in two ways, and the two negative electrode tabs are spaced apart and aligned in the second direction. The second bending portion bends along the second direction in a direction away from the two negative electrode tabs. The negative electrode tabs and the positive electrode tabs are spaced apart in the first direction.

[0011] The isolation zone is provided in multiple ways, and each of the first isolation zone and each of the second isolation zones is covered by the isolation zone.

[0012] Furthermore, the first end face has a central region located between the first isolation zone and the second isolation zone in the first direction; each isolation strip covers one first isolation zone and one second isolation zone, and at least two isolation strips intersect in the central region.

[0013] Furthermore, the first end face also has a side region, which is located on the side of the first isolation area away from the second isolation area in the first direction. The side region is provided with the isolation strip, and the isolation strip located in the side region covers the first isolation area; or / and

[0014] The first end face also has a side area, which is located on the side of the second isolation area away from the first isolation area in the first direction. The side area is provided with the isolation strip, and the isolation strip located in the side area covers the second isolation area.

[0015] Furthermore, the side area is provided with at least two isolation strips, and the at least two isolation strips intersect in the side area.

[0016] Furthermore, the main body has a first side and a second side disposed opposite to each other in the second direction;

[0017] The isolation strip includes an adhesive portion, which is adhered to the first side and / or the second side, and at least a portion of the isolation strip is not adhered to the first end face; or, the isolation strip is adhered to the first end face.

[0018] Furthermore, the positive electrode tab and the negative electrode tab are spaced apart and aligned in the first direction, the first bending portion and the second bending portion are both bent toward the same side in the second direction, and the isolation strip extends along the first direction and covers the first isolation area and the second isolation area.

[0019] Furthermore, the positive electrode tab and the negative electrode tab are spaced apart and staggered in the first direction, the isolation strip is provided on the first end face, and the isolation strip covers a part of the first isolation area and a part of the second isolation area.

[0020] Furthermore, the single-cell battery also includes:

[0021] A housing having a receiving cavity, wherein the electrode assembly is disposed in the receiving cavity;

[0022] A top cover assembly includes a top cover, a positive terminal, and a negative terminal. The top cover is connected to the housing and seals the receiving cavity. The positive terminal and the negative terminal are both disposed on the top cover, and at least one of the positive terminal and the negative terminal is insulated from the top cover. The positive terminal is electrically connected to the positive electrode tab, and the negative terminal is electrically connected to the negative electrode tab.

[0023] To achieve the above objectives, this utility model also provides a technical solution for a battery pack:

[0024] The battery pack includes the individual battery cells described in any of the above technical solutions.

[0025] Compared with the prior art, the single cell and battery pack provided by this utility model have the following advantages: the single cell includes an electrode assembly, which includes a main body, a positive electrode tab, a negative electrode tab, and a separator. The main body has a first end face in a third direction. The positive electrode tab and the negative electrode tab are both disposed on the first end face and electrically connected to the main body. The electrode assembly conducts current through the positive electrode tab and the negative electrode tab.

[0026] The positive electrode tab has a first bend, and the negative electrode tab has a second bend. The first and second bends are projected onto the first end face along a third direction, forming a first isolation area and a second isolation area, respectively. Both the positive and negative electrode tabs are bent structures, forming a buffer space to withstand the downward pressure from the top cover. When pressure is applied by the top cover, the deformation direction of the bends is well controllable, preventing the tabs from bending freely under pressure and inserting upside down into the main body. The second isolation area is spaced apart from the first isolation area, spatially reducing the possibility of contact between the positive and negative electrode tabs due to deformation under pressure, ensuring a safe distance.

[0027] In addition, an insulating strip is provided on the main body. The insulating strip is insulated from the positive electrode tab, the negative electrode tab, and the main body, and covers at least a portion of the first isolation area and at least a portion of the second isolation area. Because the insulating strip provides insulation, when the electrode tab is bent and deformed under pressure, the insulating strip blocks the direct contact between the main body and the positive and negative electrode tabs, preventing the electrode tabs from being inserted backwards and causing a short circuit. At the same time, the insulating strip can also reduce the possibility of the bent and deformed electrode tabs causing further compression damage to the main body. Attached Figure Description

[0028] Figure 1This is a schematic diagram of the electrode assembly of a single battery cell in an embodiment of this utility model;

[0029] Figure 2 This is a structural schematic diagram showing the correspondence between the bent portion and the isolation area in an embodiment of this utility model;

[0030] Figure 3 This is a top view schematic diagram of the electrode assembly of a single battery in an embodiment of this utility model;

[0031] Figure 4 This is a schematic diagram of the left side of the electrode assembly of a single battery in an embodiment of this utility model;

[0032] Figure 5 This is a front view schematic diagram of the electrode assembly of a single battery in an embodiment of this utility model;

[0033] Figure 6 This is an exploded view of the casing and top cover assembly of a single battery cell in an embodiment of this utility model.

[0034] Figure 7 This is an assembly diagram of the electrode assembly, housing, and top cover assembly of a single battery cell in an embodiment of this utility model.

[0035] Figure 8 This is a schematic diagram of the electrode assembly of a single cell in another embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram of the electrode assembly of a single cell in another embodiment of the present invention.

[0037] In the figure: 1-Main body, 11-First isolation area, 12-Second isolation area, 13-First end face, 131-Middle area, 132-Side area, 14-First side side, 15-Second side side, 2-Positive electrode tab, 21-First bending part, 3-Negative electrode tab, 31-Second bending part, 4-Insulation strip, 40-Adhesive part, 5-Electrode assembly, 6-Housing shell, 60-Receiving cavity, 7-Top cover assembly, 70-Top cover, 71-Positive electrode post, 72-Negative electrode post, 73-First connecting piece, X-First direction, Y-Second direction, Z-Third direction. Detailed Implementation

[0038] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0039] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. It should also be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information.

[0040] like Figures 1 to 7 As shown, this utility model embodiment proposes a single-cell battery with intersecting first directions X, second directions Y, and a third direction Z. The single-cell battery includes an electrode assembly 5. The electrode assembly 5 includes: a main body 1, a positive electrode tab 2, a negative electrode tab 3, and a separator 4. The main body 1 has a first end face 13 in the third direction Z; the positive electrode tab 2 and the negative electrode tab 3 are both disposed on the first end face 13 and electrically connected to the main body 1. Wherein:

[0041] The positive electrode tab 2 has a first bending portion 21, and the projection of the first bending portion 21 along the third direction Z on the first end face 13 forms a first isolation area 11; the negative electrode tab 3 has a second bending portion 31, and the projection of the second bending portion 31 along the third direction Z on the first end face 13 forms a second isolation area 12, and the second isolation area 12 is spaced apart from the first isolation area 11; the isolation strip 4 is provided on the main body 1, and the isolation strip 4 is insulated from the positive electrode tab 2, the negative electrode tab 3 and the main body 1, and the isolation strip 4 covers at least a portion of the first isolation area 11 and at least a portion of the second isolation area 12.

[0042] The single battery includes an electrode assembly 5, which includes a main body 1, a positive electrode tab 2, a negative electrode tab 3, and a separator 4. The main body 1 has a first end face 13 in the third direction Z. The positive electrode tab 2 and the negative electrode tab 3 are both disposed on the first end face 13 and electrically connected to the main body 1. The electrode assembly 5 leads out the current through the positive electrode tab 2 and the negative electrode tab 3 so as to connect with the terminal post of the top cover 70.

[0043] The positive electrode tab 2 has a first bending portion 21, and the negative electrode tab 3 has a second bending portion 31. The projection areas of the first bending portion 21 and the second bending portion 31 on the first end face 13 along the third direction Z are the first isolation area 11 and the second isolation area 12, respectively. Both the positive electrode tab 2 and the negative electrode tab 3 are designed with a bending structure. The first bending portion 21 and the second bending portion 31 form a buffer space for the tabs to cope with the downward pressure of the top cover 70. When the top cover 70 applies pressure, the deformation direction of the bending portion is well controllable, avoiding the situation where the tabs are compressed and freely bend and insert upside down into the main body 1. The second isolation area 12 is spaced apart from the first isolation area 11, which spatially reduces the possibility of the positive electrode tab 2 and the negative electrode tab 3 coming into contact due to compression deformation, ensuring a safe distance.

[0044] In addition, an insulating strip 4 is provided on the main body 1. The insulating strip 4 is insulated from the positive electrode tab 2, the negative electrode tab 3, and the main body 1, and the insulating strip 4 covers at least a portion of the first isolation area 11 and at least a portion of the second isolation area 12. Since the insulating strip 4 provides insulation, when the tab is bent and deformed under pressure, the insulating strip 4 blocks the direct contact between the main body 1 and the positive electrode tab 2 and the negative electrode tab 3 and the main body 1, preventing the tab from being inserted backwards and causing a short circuit. At the same time, the insulating strip 4 can also reduce the possibility of the bent and deformed tab causing further compression damage to the main body 1.

[0045] In one embodiment, such as Figure 1 and Figure 2 As shown, there are two positive electrode tabs 2, which are spaced apart and aligned in the second direction Y. The first bending portion 21 bends along the second direction Y in a direction away from the two positive electrode tabs 2. There are two negative electrode tabs 3, which are spaced apart and aligned in the second direction Y. The second bending portion 31 bends along the second direction Y in a direction away from the two negative electrode tabs 3, and the negative electrode tabs 3 and the positive electrode tabs 2 are spaced apart in the first direction X. There are multiple isolation strips 4, and each of the first isolation areas 11 and each of the second isolation areas 12 is covered by an isolation strip 4.

[0046] Both the positive electrode tab 2 and the negative electrode tab 3 are bipolar tabs, which disperse the flow and reduce the risk of local overheating. The two first bends 21 and the two second bends 31 are bent in opposite directions to each other, ensuring that the pressure generated by the top cover 71 is evenly distributed and that the spatial layout of the top area is more balanced. Multiple isolation strips 4 provide comprehensive isolation protection for the tabs, preventing short circuits that may be caused by bending or deforming any tab.

[0047] It is understandable that:

[0048] Two positive electrode tabs 2 are spaced apart and aligned in the second direction Y; two negative electrode tabs 3 are spaced apart and aligned in the second direction Y. Here, alignment means that the projections of the tabs in the second direction Y should at least partially or completely overlap. For example, if the two positive electrode tabs 2 are exactly the same in size and shape, only differing in bending direction, this alignment is roughly the optimal solution, making the corresponding edges of the two positive electrode tabs 2 roughly aligned in the first direction X, and completely overlapping when projected in the second direction Y.

[0049] The first bending portion 21 bends along the second direction Y in a direction away from each other for the two positive electrode tabs 2; the second bending portion 31 bends along the second direction Y in a direction away from each other for the two negative electrode tabs 3. Here, "away from each other" means that the two tabs are spaced apart in the second direction Y, and the bending direction of the bending portion on one tab is in a direction away from the other tab, while the bending direction of the bending portion on the other tab is opposite to the bending direction of the aforementioned bending portion.

[0050] In one embodiment, such as Figure 2 and Figure 3 As shown, the first end face 13 has a central region 131, which is located between the first isolation zone 11 and the second isolation zone 12 in the first direction X; each isolation zone 4 covers one first isolation zone 11 and one second isolation zone 12, and at least two isolation zones 4 intersect in the central region 131.

[0051] An isolation strip 4 is intersected in the central region 131, and the central region 131 is located between the first isolation region 11 and the second isolation region 12 in the first direction X. It plays a cooperative insulating role between the positive electrode tab 2 and the negative electrode tab 3, effectively blocking the possible contact path between the positive electrode tab 2 and the negative electrode tab 3, and also preventing the tab from being inserted into the main body 1 in the central region 131 when pressed down. At the same time, it prevents the top cover 70 from directly pressing and contacting the central region 131, thereby improving battery safety.

[0052] In one embodiment, such as Figure 2 and Figure 3 As shown, the first end face 13 also has a side area 132, which is located on the side of the first isolation area 11 away from the second isolation area 12 in the first direction X. The side area 132 is provided with an isolation strip 4, which covers the first isolation area 11.

[0053] In another embodiment, such as Figure 2 and Figure 3 As shown, the first end face 13 also has a side area 132, which is located on the side of the second isolation area 12 away from the first isolation area 11 in the first direction X. The side area 132 is also provided with an isolation strip 4, which covers the second isolation area 12.

[0054] like Figure 2 and Figure 3 In the illustrated embodiment, side areas 132 are provided on opposite sides of the positive electrode tab 2 and the negative electrode tab 3. Each side area 132 is provided with an insulating strip 4, and each insulating strip 4 covers a first insulating area 11 or a second insulating area 12. Furthermore, the side area 132 is provided with at least two insulating strips 4, and the at least two insulating strips 4 intersect in the side area 132. The intersecting insulating strips 4 in the side area 132 increase the area covered by the insulating strips 4 in the first insulating area 11 and the second insulating area 12, and provide more reliable insulation protection for the positive electrode tab 2 and the negative electrode tab 3, while preventing the top cover 70 from directly pressing against the side area 132.

[0055] There can be only one side region 132, which can be provided only on the side of the positive electrode tab 2 that is opposite to the negative electrode tab 3, or only on the side of the negative electrode tab 3 that is opposite to the positive electrode tab 2; it can also be as follows: Figure 2 and Figure 3 As shown, there are two side regions 132.

[0056] An isolation strip 4 is also provided in the side area 132, which can reduce or avoid the possibility that the positive electrode tab 2 and the negative electrode tab 3 will be inserted into the main body 1 in the side area 132 after being pressed down, so as to reduce safety hazards.

[0057] As a further preferred embodiment, the main body 1 has a first side surface 14 and a second side surface 15 disposed opposite to each other in the second direction Y; the isolation strip 4 includes an adhesive portion 40, which is adhered to the first side surface 14 and / or the second side surface 15, and at least a portion of the isolation strip 4 is not adhered to the first end face 13.

[0058] like Figure 1 , Figure 5 As shown, each isolation strip 4 is bonded to the first side 14 and the second side 15 of the main body 1 through the adhesive portions 40 at both ends, thereby achieving the purpose of effectively fixing the isolation strip 4.

[0059] In other embodiments, to simplify the design, the isolation strip 4 can be bonded to the first side surface 14 or the second side surface 15 via an adhesive portion at only one end. Alternatively, the adhesive portion 40 at the end of the isolation strip 4 can be omitted, and the isolation strip 4 can be directly bonded to the first end face 13, achieving the same purpose of fixed connection.

[0060] Optionally, the isolation strip 4 is an adhesive tape. The adhesive tape includes a base and an adhesive, and at least one of the base and the adhesive also has a certain buffering effect, which can buffer the downward pressure on the first end face 13 after the electrode tab is bent, and protect the main body 1.

[0061] In one embodiment, such as Figure 6 and Figure 7As shown, the single battery cell also includes: a housing 6 and a top cover assembly 7. Wherein:

[0062] The housing 6 has a receiving cavity 60, and the electrode assembly 5 is disposed in the receiving cavity 60.

[0063] The top cover assembly 7 includes a top cover 70, a positive terminal 71, and a negative terminal 72. The top cover 70 is connected to the housing 6 and seals the receiving cavity 60. The positive terminal 71 and the negative terminal 72 are both located on the top cover 70, and at least one of the positive terminal 71 and the negative terminal 72 is insulated from the top cover 70. The positive terminal 71 is electrically connected to the positive terminal tab 2, and the negative terminal 72 is electrically connected to the negative terminal tab 3.

[0064] Positive terminal 71 and negative terminal 72 are the positive and negative terminals of the single cell output to output the battery current.

[0065] In one embodiment, such as Figure 6 and Figure 7 As shown, the single cell also includes a first connecting piece 73 and a second connecting piece. The first connecting piece 73 electrically connects the positive terminal 71 to all the positive electrode tabs 2, and the second connecting piece electrically connects the negative terminal 72 to all the negative electrode tabs 3.

[0066] The housing 6 provides a cavity 60 for the electrode assembly 5 and provides mechanical protection for the internal electrode assembly 5. The top cover 70 is connected to the housing 6 and seals the cavity 60, ensuring effective isolation between the electrode assembly 5, the electrolyte, and the external environment, thereby ensuring the operational stability of the internal components and the electrode solution. Current conduction paths are provided through the positive terminal 71 and the negative terminal 72, ensuring normal charging and discharging operation. At least one of the positive and negative terminals is insulated from the top cover 70 to prevent short circuits that the top cover 70 may cause.

[0067] In other embodiments, the design of the positive electrode tab 2, the negative electrode tab 3, and the insulating strip 4 can be adapted to meet different insulation requirements.

[0068] like Figure 8 As shown, the positive electrode tab 2 and the negative electrode tab 3 are spaced apart and aligned in the first direction X. The first bending portion 21 and the second bending portion 31 are both bent towards the same side in the second direction Y. The insulating strip 4 extends along the first direction X and covers the first insulating area 11 and the second insulating area 12. The structure of one positive electrode tab 2, one negative electrode tab 3 and one insulating strip 4 is simple. The insulating strip 4 can effectively cover the first insulating area 11 and the second insulating area 12, thereby playing the role of reliably insulating and protecting the main body 1.

[0069] like Figure 9As shown, the positive electrode tab 2 and the negative electrode tab 3 are spaced apart and staggered in the first direction X. An isolation strip 4 is provided on the first end face 13, and the isolation strip 4 covers a part of the first isolation area 11 and a part of the second isolation area 12. Similarly, by means of an obliquely extending isolation strip 4, a part of the first isolation area 11 and a part of the second isolation area 12 can be covered to prevent short circuit problems caused by the electrode tabs being inserted backward into the main body 1.

[0070] This utility model provides a battery pack, which includes individual batteries. The individual batteries are the same as the specific embodiments of the individual batteries in the embodiments of this utility model, and will not be described again here.

[0071] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A unit cell having a first direction (X), a second direction (Y), and a third direction (Z) that intersect two by two, characterized in that, The electrode assembly (5) comprises: a body portion (1) having a first end surface (13) in the third direction (Z); a positive electrode tab (2) and a negative electrode tab (3) both arranged on the first end surface (13) and electrically connected with the body portion (1); the positive electrode tab (2) has a first bending portion (21), a projection of the first bending portion (21) on the first end surface (13) in the third direction (Z) forms a first isolation area (11), the negative electrode tab (3) has a second bending portion (31), a projection of the second bending portion (31) on the first end surface (13) in the third direction (Z) forms a second isolation area (12), and the second isolation area (12) is arranged in a spaced manner with the first isolation area (11); an isolation belt (4) arranged on the body portion (1); the isolation belt (4) is arranged in an insulating manner with the positive electrode tab (2), the negative electrode tab (3) and the body portion (1), and covers at least part of the first isolation area (11) and at least part of the second isolation area (12).

2. The cell according to claim 1, wherein The positive electrode tab (2) is provided with two, and the two positive electrode tabs (2) are arranged in a spaced manner and aligned in the second direction (Y), and the first bending portion (21) is bent in the second direction (Y) away from each other direction of the two positive electrode tabs (2); The negative electrode tab (3) is provided with two, and the two negative electrode tabs (3) are arranged in a spaced manner and aligned in the second direction (Y), and the second bending portion (31) is bent in the second direction (Y) away from each other direction of the two negative electrode tabs (3), and the negative electrode tab (3) and the positive electrode tab (2) are arranged in a spaced manner in the first direction (X); The isolation belt (4) is provided with a plurality of, and any first isolation area (11) and any second isolation area (12) are covered with the isolation belt (4).

3. The cell according to claim 2, wherein The first end surface (13) has a middle area (131) between the first isolation area (11) and the second isolation area (12) in the first direction (X); each isolation belt (4) covers one first isolation area (11) and one second isolation area (12), and at least two isolation belts (4) cross in the middle area (131).

4. The cell according to claim 3, wherein The first end surface (13) further has a side area (132) on one side of the first isolation area (11) away from the second isolation area (12) in the first direction (X), and the side area (132) is provided with the isolation belt (4), and the isolation belt (4) located in the side area (132) covers the first isolation area (11); or / and, The first end face (13) further has a side area (132) located on a side of the second isolation area (12) away from the first isolation area (11) in the first direction (X), and the side area (132) is provided with the isolation band (4), and the isolation band (4) located in the side area (132) covers the second isolation area (12).

5. The cell according to claim 4, wherein The side area (132) is provided with at least two isolation bands (4), and the at least two isolation bands (4) intersect in the side area (132).

6. The cell according to claim 4, wherein The main body (1) has a first side face (14) and a second side face (15) oppositely arranged in the second direction (Y); The isolation band (4) comprises a bonding portion (40) bonded to the first side face (14) and / or the second side face (15), and at least part of the non-bonding portion of the isolation band (4) is arranged on the first end face (13); or the isolation band (4) is bonded to the first end face (13).

7. The cell according to claim 1, wherein The positive electrode tab (2) and the negative electrode tab (3) are arranged in the first direction (X) and are aligned, the first bending portion (21) and the second bending portion (31) are bent to the same side along the second direction (Y), and the isolation band (4) extends along the first direction (X) and covers the first isolation area (11) and the second isolation area (12).

8. The cell according to claim 1, wherein The positive electrode tab (2) and the negative electrode tab (3) are arranged in the first direction (X) and are staggered, the isolation band (4) is arranged on the first end face (13), and the isolation band (4) covers part of the first isolation area (11) and part of the second isolation area (12).

9. The monobloc cell according to any one of claims 1 to 8, characterized in that, The single battery further comprises: A shell (6) having a receiving cavity (60), and the electrode assembly (5) is arranged in the receiving cavity (60); A top cover assembly (7) comprising a top cover (70), a positive electrode post (71) and a negative electrode post (72), the top cover (70) is connected with the shell (6) and covers the receiving cavity (60), the positive electrode post (71) and the negative electrode post (72) are arranged on the top cover (70), at least one of the positive electrode post (71) and the negative electrode post (72) is insulated from the top cover (70), the positive electrode post (71) is electrically connected with the positive electrode tab (2), and the negative electrode post (72) is electrically connected with the negative electrode tab (3).

10. A battery pack, characterized by, The single battery comprises the single battery according to any one of claims 1-9.

Images