Battery pack, battery pack and electric device

Abstract

The embodiment of the utility model provides a battery pack, battery pack and power utilization device, including: at least one battery monomer and buffer member, the battery monomer is provided with two protruding parts on its first side, the protruding parts protrude out of the first side of the battery monomer along the first direction, the two protruding parts are respectively arranged at the two ends of the battery monomer in the second direction, and the buffer member is arranged on the first side of the battery monomer. The second direction is perpendicular to the first direction; the buffer part is connected to the first side of the battery monomer, at least part of the buffer part is arranged in a gap between the two convex parts, and the thickness of the buffer part in the first direction is greater than the height of the convex parts in the first direction. According to the battery pack provided by the invention, the buffer piece can buffer the stress of the first side of the single battery body and can perform clearance protection on the lug boss, so that the single battery body can be effectively prevented from being collided or rubbed, the stability of the battery pack can be improved, and the probability of liquid leakage and failure of the battery pack is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to a battery pack, a battery package and an electric device. Background Art

[0002] At present, the battery shell of the battery pack is usually prepared by a double-pit punching process using an aluminum-plastic film. After the aluminum-plastic film is punched, a double pit is formed. The aluminum-plastic film is folded in half, and the double pits can be enclosed to form a cavity for assembling the pole core. The pole core is assembled in the cavity, and the preparation of the battery pack can be realized.

[0003] Among them, after the aluminum-plastic film is folded in half, due to the existence of the double pits, triangular protrusions are formed at the bottom corners on both sides of the battery pack. In the existing technology, a "bottom corner pressing" process, also called "corner sealing", is usually added at the position of the triangular protrusions to eliminate the folding stress of the aluminum-plastic film and enhance the bottom support strength.

[0004] However, "corner sealing" cannot solve the damage caused by the external environment to the bottom corners on both sides of the battery pack. For example, during transportation, the bottom corners of the battery pack collide with the material frame, causing wear and even deformation of the bottom corners; during the assembly of the battery pack, improper operation by personnel causes collision, wear and even deformation of the bottom corners; during the use of the battery pack, there are bumps, vibrations and shaking, and the battery pack collides or rubs with the inner shell, causing wear and even deformation of the bottom corners, which can easily cause the battery pack to leak and fail. Utility Model Content

[0005] In view of the above problems, embodiments of the present utility model are proposed to provide a battery pack, a battery package and an electric device that overcome the above problems or at least partially solve the above problems.

[0006] In order to solve the above problems, the embodiment of the utility model discloses a battery pack, including: at least one battery cell and a buffer, wherein:

[0007] The battery cell has two protrusions on its first side, the protrusions protrude from the first side of the battery cell along a first direction, and the two protrusions are respectively arranged at two ends of the battery cell in a second direction, and the second direction is perpendicular to the first direction;

[0008] The buffer is connected to the first side of the battery cell, at least a portion of the buffer is disposed in a gap between two protrusions, and a thickness of the buffer in the first direction is greater than a height of the protrusion in the first direction.

[0009] Optionally, the compression amount of the buffer member is the ratio of the thickness of the buffer member after compression to the thickness of the buffer member before compression, the minimum compression amount of the buffer member is A, and the height of the protrusion in the first direction is H;

[0010] A thickness δ1 of the buffer member in the first direction is ≥H / A, wherein 0<A<1.

[0011] Optionally, the number of the buffer members includes at least one, and the buffer members are arranged in a one-to-one correspondence with the battery cells;

[0012] An orthographic projection of the buffer member along the first direction falls within an orthographic projection of the corresponding battery cell along the first direction.

[0013] Optionally, the width of the battery cell in the second direction is W2;

[0014] The length of the buffer in the second direction is L1=W2-4mm.

[0015] Optionally, the thickness of the battery cell in the third direction is δ2, the width of the buffer in the third direction is W1, the third direction intersects with the second direction, and a plane formed by the third direction and the second direction is perpendicular to the first direction;

[0016] δ2-0.3mm≤W1≤δ2.

[0017] Optionally, the number of the buffer member includes one, the number of the battery cells is N, and N≥2;

[0018] The N battery cells are stacked along a third direction, the third direction intersects the second direction, and a plane formed by the third direction and the second direction is perpendicular to the first direction;

[0019] The buffer members are respectively connected to the first sides of the N battery cells.

[0020] Optionally, the thickness of the battery cell in the third direction is δ2, and the length of the buffer in the third direction is L2;

[0021] N*δ2-0.3mm≤L2≤N*δ2.

[0022] Optionally, the width of the battery cell in the second direction is W2;

[0023] The width of the buffer in the second direction is W3 = W2 - 4 mm.

[0024] Optionally, the buffer component includes one of foam, sponge, and rubber pad.

[0025] Optionally, the buffer member is adhesively connected to the first side of the battery cell.

[0026] In a second aspect, the utility model also discloses a battery pack, comprising the above-mentioned battery pack.

[0027] In a third aspect, the utility model further discloses an electrical device, comprising the above-mentioned battery group or the above-mentioned battery pack.

[0028] The utility model embodiment includes the following advantages:

[0029] In an embodiment of the utility model, the battery cell has two protrusions on its first side, and the buffer is connected to the first side of the battery cell, so that the buffer and the protrusion are arranged on the same side of the battery cell. Since the buffer is connected to the first side of the battery cell, at least a portion of the buffer is arranged in the gap between the two protrusions, and the thickness of the buffer in the first direction is greater than the height of the protrusion in the first direction. In this way, during the transportation, assembly or use of the battery pack, the buffer can buffer the force on the first side of the battery cell, and can protect the protrusion from air, which can effectively prevent the battery cell from being bumped or rubbed, improve the stability of the battery pack, and reduce the probability of leakage failure of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of a battery cell of the utility model;

[0031] Figure 2 It is a partial structural schematic diagram of a battery cell of the utility model;

[0032] Figure 3 This is a structural schematic diagram of a battery pack of the utility model;

[0033] Figure 4 This is a partial structural schematic diagram of a battery pack of the utility model;

[0034] Figure 5 It is a structural schematic diagram of another battery pack of the utility model;

[0035] Figure 6 The utility model is a schematic diagram of the bottom structure of a battery pack.

[0036] Description of reference numerals:

[0037] 1-battery cell, 11-protrusion, 12-ear, 2-buffer. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0039] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this utility model, unless otherwise specified, "multiple" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] One of the core concepts of an embodiment of the utility model is to disclose a battery pack, which may include at least one battery cell 1 and a buffer 2, wherein the battery cell 1 has two protrusions 11 on its first side, the protrusions 11 may protrude from the first side of the battery cell 1 along a first direction, the two protrusions 11 are respectively arranged at both ends of the battery cell 1 in a second direction, and the second direction is perpendicular to the first direction; the buffer 2 is connected to the first side of the battery cell 1, at least part of the buffer 2 is arranged in the gap between the two protrusions 11, and the thickness of the buffer 2 in the first direction is greater than the height of the protrusions 11 in the first direction.

[0043] In an embodiment of the utility model, the battery cell 1 has two protrusions 11 on its first side, and the buffer 2 is connected to the first side of the battery cell 1, so that the buffer 2 and the protrusion 11 are arranged on the same side of the battery cell 1. Since the buffer 2 is connected to the first side of the battery cell 1, at least a portion of the buffer 2 is arranged in the gap between the two protrusions 11, and the thickness of the buffer 2 in the first direction is greater than the height of the protrusion 11 in the first direction. In this way, during the transportation, assembly or use of the battery pack, the buffer 2 can buffer the force on the first side of the battery cell 1, and can protect the protrusion 11 from air, which can effectively prevent the battery cell 1 from being bumped or rubbed, improve the stability of the battery pack, and reduce the probability of leakage failure of the battery pack.

[0044] The battery pack in the embodiment of the present invention may include one battery cell 1, or may also include at least two battery cells 1, for example, two, ten or twenty battery cells 1.

[0045] Specifically, the length, width and thickness of the battery cell 1 can be arranged along the first direction, the second direction and the third direction respectively, that is, the length direction of the battery cell 1 is the first direction, the width direction of the battery cell 1 is the second direction, and the thickness direction of the battery cell 1 is the third direction, wherein the first direction, the second direction and the third direction can be perpendicular to each other, and the first direction can be Figure 1 In the direction of the arrow in, the second direction can be Figure 2 In the direction of the arrow in, the third direction can be Figure 5 The direction of the arrow.

[0046] Specifically, the battery cell 1 may include a first side and a second side opposite to each other along the first direction. The battery cell 1 has two protrusions 11 on the first side thereof. The protrusions 11 may protrude from the first side of the battery cell 1 .

[0047] Specifically, the two protrusions 11 may be respectively disposed at two ends of the battery cell 1 along the second direction, so that the two protrusions 11 are disposed at intervals and there is a gap between the two protrusions 11 .

[0048] Specifically, the battery cell 1 is provided with a pole lug 12 on the second side thereof to facilitate electrical connection.

[0049] Specifically, the battery pack further includes a buffer 2, which can be connected to the first side of the battery cell 1, so that the buffer 2 and the protrusion 11 are arranged on the same side of the battery cell 1. At least part of the buffer 2 is arranged in the gap between the two protrusions 11, and the thickness of the buffer 2 in the first direction is greater than the height of the protrusion 11 in the first direction. In this way, during the transportation, packaging or use of the battery pack, the buffer 2 can bear the force, and the buffer 2 can play a buffering role, which can prevent the first side of the battery cell 1 from being collided and squeezed. Moreover, since the thickness of the buffer 2 in the first direction is greater than the height of the protrusion 11 in the first direction, the buffer 2 can also play a role of air protection for the protrusion 11, which can prevent the protrusion 11 from being collided or rubbed and subjected to force, thereby improving the stability of the battery pack and reducing the probability of leakage failure of the battery cell 1.

[0050] Specifically, the first side of the battery cell 1 may be the bottom of the battery cell 1 , so that the buffer 2 may also play a role in supporting the battery cell 1 .

[0051] Specifically, since the buffer 2 is arranged in the gap between the two protrusions 11, the length of the buffer 2 in the second direction can be smaller than the width of the battery cell 1 in the second direction, which can effectively ensure that the buffer 2 can reduce the material of the buffer 2 while protecting the protrusions 11 from air. In the embodiment of the utility model, the length of the buffer 2 in the second direction can be selected to a suitable size according to the size of the battery cell 1, which is more reasonable.

[0052] Specifically, taking the battery cell 1 as a soft pack battery as an example, the battery cell 1 may include a pole core and an aluminum-plastic film wrapped around the pole core. The aluminum-plastic film may first be punched by the convex and concave dies of the punching die set to form a double pit on the aluminum-plastic film, wherein there is usually a certain punching gap between the convex and concave dies; then the aluminum-plastic film is folded in the middle to install the pole core in the double pit. After folding, the originally reserved punching gap will form a triangular protrusion at the bottom corners on both sides, that is, two protrusions 11 are formed on the first side of the battery cell 1. The punching gap between the convex and concave dies is 2H, and the height of the protrusion 11 in the first direction is H.

[0053] Optionally, the compression amount of the buffer 2 is the ratio of the thickness of the buffer 2 after compression to the thickness before compression, the minimum compression amount of the buffer 2 can be A, the height of the protrusion 11 in the first direction is H; the thickness of the buffer 2 in the first direction δ1≥H / A, where 0<A<1.

[0054] In an embodiment of the utility model, the thickness of the buffer 2 in the first direction is calculated by combining the minimum compression amount of the buffer 2 and the height of the protrusion 11 in the first direction, which can improve the reliability and accuracy of the buffer 2 in protecting the protrusion 11 from air, so as to further reduce the probability of the protrusion 11 being subjected to force, thereby improving the stability of the battery pack.

[0055] Specifically, the compression amount of the buffer 2 can be determined according to the material of the buffer 2. The compression amount of the buffer 2 is the ratio of the thickness of the buffer 2 after compression to the thickness before compression. For example, the thickness of the buffer 2 when not compressed is λ1, and the thickness of the buffer 2 after compression is λ2, then the compression amount of the buffer 2 is λ2 / λ1. Among them, the minimum compression amount of the buffer 2 is A, 0<A<1. The size of the buffer 2 can be selected in combination with its own characteristics and the size of the battery cell 1, which has general reference significance. For example, the compression amount of the buffer 2 is 20%-60%, then the minimum compression amount of the buffer 2 is A=20%.

[0056] Specifically, the thickness δ1 of the buffer 2 in the first direction is ≥ H / A, so that when the thickness δ1 of the buffer 2 along the first direction is compressed to the thinnest, the thickness δ1 of the buffer 2 in the first direction can still be equal to or greater than the height H of the protrusion 11 in the first direction, effectively ensuring that the buffer 2 plays a role in protecting the protrusion 11 from air. When the thickness δ1 of the buffer 2 in the first direction is greater than H / A, the buffer 2 plays a better role in protecting the protrusion 11 from air.

[0057] For example, the height of the protrusion 11 in the first direction is 1.0 mm, the minimum compression of the buffer 2 is 0.6, the thickness of the buffer 2 in the first direction should be greater than 1.67 mm, and the thickness of the buffer 2 in the first direction can be selected from 1.67 mm, 1.7 mm, 2 mm, 2.2 mm, etc.

[0058] In some optional embodiments of the present invention, the number of buffer members 2 includes at least one, and the buffer members 2 are arranged in a one-to-one correspondence with the battery cells 1; the orthographic projection of the buffer member 2 along the first direction falls within the orthographic projection of the corresponding battery cell 1 along the first direction.

[0059] In an embodiment of the utility model, the orthographic projection of the buffer 2 along the first direction falls within the orthographic projection of the corresponding battery cell 1 along the first direction, so that the size of the buffer 2 is adapted to the size of the corresponding battery cell 1. In this way, while effectively ensuring that the buffer 2 plays a protective role on the battery cell 1, the material used for the buffer 2 can also be reduced, saving costs.

[0060] Specifically, the number of buffer components 2 may be consistent with the number of battery cells 1 , and the number of buffer components 2 may be configured according to the number of battery cells 1 , and one buffer component 2 may correspondingly protect one battery cell 1 .

[0061] Specifically, the orthographic projection of the buffer 2 along the first direction falls within the orthographic projection of the corresponding battery cell 1 along the first direction, so that the length of the buffer 2 in the second direction can be smaller than the width of the corresponding battery cell 1 in the second direction, and the width of the buffer 2 in the third direction can be smaller than or equal to the thickness of the corresponding battery cell 1 in the third direction.

[0062] Optionally, the width of the battery cell 1 in the second direction may be W2; and the length of the buffer 2 in the second direction may be L1 = W2 - 4 mm.

[0063] In the embodiment of the utility model, the length L1 of the buffer 2 in the second direction is 2 mm shorter than the width W2 of the battery cell 1 in the second direction, which can effectively ensure that the buffer 2 is accommodated in the gap between the two protrusions 11 and ensure that the buffer 2 has a sufficient length in the second direction, thereby improving the reliability of the buffer 2 in protecting the protrusions 11 from air.

[0064] Specifically, the length L1 of the buffer member 2 in the second direction can be selected to a suitable size according to the size of the battery cell 1 .

[0065] Optionally, the thickness of the battery cell 1 in the third direction is δ2, the width of the buffer 2 in the third direction is W1, the third direction intersects with the second direction, and the plane formed by the third direction and the second direction is perpendicular to the first direction; wherein, δ2-0.3mm≤W1≤δ2.

[0066] In an embodiment of the utility model, δ2-0.3mm≤W1≤δ2, so that the width W1 of the buffer 2 in the third direction can be equal to or slightly smaller than the thickness δ2 of the battery cell 1 in the third direction, which can effectively ensure that the orthographic projection of the buffer 2 along the first direction falls within the orthographic projection of the corresponding battery cell 1 along the first direction.

[0067] Specifically, the width W1 of the buffer member 2 in the third direction can be selected to a suitable size according to the size of the battery cell 1 .

[0068] Taking the one-to-one correspondence between the buffer 2 and the battery cell 1 as an example, the width of the battery cell 1 in the second direction is W2, and the thickness of the battery cell 1 in the third direction is δ2. The corresponding size selection principle of the buffer 2 should be as follows: the length L1 of the buffer 2 in the second direction is W2-4mm, the width of the buffer 2 in the third direction is W1≤δ2, and W1≥δ2-0.3mm, and the thickness of the buffer 2 in the first direction is δ1≥H / A.

[0069] In some other optional embodiments of the utility model, the number of buffer members 2 may include one, the number of battery cells 1 may be N, N ≥ 2; the N battery cells 1 are stacked along the third direction, the third direction intersects with the second direction, and the plane formed by the third direction and the second direction is perpendicular to the first direction; the buffer members 2 are respectively connected to the first sides of the N battery cells 1.

[0070] In an embodiment of the utility model, the buffer member 2 is respectively connected to the first sides of N battery cells 1, so that the buffer member 2 can simultaneously provide air protection for the N battery cells 1, and can increase the contact surface between the buffer member 2 and the battery cell 1, thereby increasing the supporting strength of the buffer member 2 for the battery cell 1.

[0071] Specifically, N battery cells 1 can be stacked along a third direction, and the buffer components 2 can be respectively connected to the first sides of the N battery cells 1, so that one buffer component 2 can be arranged corresponding to the N battery cells 1, and the length of the buffer component 2 in the third direction can be selected according to the sum of the thicknesses of the N battery cells 1 in the third direction.

[0072] Specifically, the width of the buffer 2 in the second direction can be selected according to the width of the battery cell 1 in the second direction.

[0073] Optionally, the thickness of the battery cell 1 in the third direction may be δ2; the length of the buffer 2 in the third direction is L2; ​​N*δ2-0.3mm≤L2≤N*δ2.

[0074] In an embodiment of the utility model, the length L2 of the buffer 2 in the third direction may be equal to the sum of the thicknesses of the N battery cells 1 in the third direction, or may be slightly smaller than the sum of the thicknesses of the N battery cells 1 in the third direction, so that the size of the buffer 2 can be adapted to the N battery cells 1, and can effectively ensure that the buffer 2 provides air protection for the N battery cells 1; moreover, the material used for the buffer 2 can be saved to save costs.

[0075] Optionally, the width of the battery cell 1 in the second direction is W2; the width of the buffer 2 in the second direction is W3=W2-4 mm.

[0076] In an embodiment of the utility model, the width W3 of the buffer 2 in the second direction can be 2 mm less than the width W2 of the battery cell 1 in the second direction, which can effectively ensure that the buffer 2 is accommodated in the gap between the two protrusions 11 on the battery cell 1 and ensure that the buffer 2 has a sufficient length in the second direction, thereby improving the reliability of the buffer 2 in protecting the protrusions 11 from air.

[0077] Taking the corresponding setting of the buffer 2 and N battery cells 1 as an example, the width of the battery cell 1 in the second direction is W2, and the thickness of the battery cell 1 in the third direction is δ2. The corresponding size selection principle of the buffer 2 should be followed: the length of the buffer 2 in the third direction is L2≤N*δ2, and L2≥N*δ2-0.3mm, the width of the buffer 2 in the second direction is W3=W2-4mm, and the thickness of the buffer 2 in the first direction is δ1≥H / A.

[0078] In some further optional embodiments of the present invention, the buffer 2 may include one of foam, sponge, and rubber pad to effectively ensure that the buffer 2 can buffer the force and prevent the battery cell 1 from being impacted. It can also provide air protection for the raised portion 11 on the battery cell 1, and the structural diversity of the buffer 2 can also be improved.

[0079] Specifically, the buffer member 2 may be foam, sponge, or a rubber pad.

[0080] Optionally, the buffer member 2 may be adhesively connected to the first side of the battery cell 1 .

[0081] In the embodiment of the utility model, the buffer member 2 can be fixed to the first side of the battery cell 1 by bonding, which can improve the convenience and reliability of fixing the buffer member 2 to the battery cell 1.

[0082] Specifically, the buffer member 2 can be bonded to the first side of the battery cell 1 by means of double-sided tape or glue, wherein the glue can be soft glue.

[0083] Specifically, the buffer member 2 may be centrally bonded to the first side of the battery cell 1 .

[0084] The battery pack described in the embodiment of the utility model has at least the following advantages:

[0085] In the embodiment of the utility model, the battery cell has two protrusions on its first side, and the buffer is connected to the first side of the battery cell, so that the buffer and the protrusion are arranged on the same side of the battery cell. Since the buffer is connected to the first side of the battery cell, at least part of the buffer is arranged in the gap between the two protrusions, and the thickness of the buffer in the first direction is greater than the height of the protrusion in the first direction. In this way, during the transportation, assembly or use of the battery pack, the buffer can buffer the force on the first side of the battery cell, and can protect the protrusion from air, which can effectively prevent the battery cell from being bumped or rubbed, improve the stability of the battery pack, and reduce the probability of leakage failure of the battery pack. In the embodiment of the utility model, the buffer can be used to protect the battery cell, and can protect the protrusion on the battery cell from air, which can effectively prevent the first side of the battery cell and the protrusion from being bumped and rubbed during transportation, assembly and use, which can improve the process stability of the battery pack and reduce the probability of leakage failure of the battery cell. Moreover, the size of the buffer can be selected in combination with its own characteristics and the size of the battery cell, which has general reference significance.

[0086] In a second aspect, the utility model further discloses a battery pack, which may specifically include the above-mentioned battery pack.

[0087] In the embodiment of the present invention, the battery pack may include one or at least two battery packs.

[0088] The battery pack described in the embodiment of the utility model has at least the following advantages:

[0089] In an embodiment of the utility model, the battery cell has two protrusions on its first side, and the buffer is connected to the first side of the battery cell, so that the buffer and the protrusion are arranged on the same side of the battery cell. Since the buffer is connected to the first side of the battery cell, at least a portion of the buffer is arranged in the gap between the two protrusions, and the thickness of the buffer in the first direction is greater than the height of the protrusion in the first direction. In this way, during the transportation, assembly or use of the battery pack, the buffer can buffer the force on the first side of the battery cell, and can protect the protrusion from air, which can effectively prevent the battery cell from being bumped or rubbed, improve the stability of the battery pack, and reduce the probability of leakage failure of the battery pack.

[0090] In a third aspect, the utility model further discloses an electrical device, which may specifically include the above-mentioned battery pack or the above-mentioned battery package.

[0091] In the embodiment of the utility model, the power-consuming device includes but is not limited to a car, a bus or a tricycle.

[0092] The electrical device described in the embodiment of the utility model has at least the following advantages:

[0093] In an embodiment of the utility model, the battery cell has two protrusions on its first side, and the buffer is connected to the first side of the battery cell, so that the buffer and the protrusion are arranged on the same side of the battery cell. Since the buffer is connected to the first side of the battery cell, at least a portion of the buffer is arranged in the gap between the two protrusions, and the thickness of the buffer in the first direction is greater than the height of the protrusion in the first direction. In this way, during the transportation, assembly or use of the battery pack, the buffer can buffer the force on the first side of the battery cell, and can protect the protrusion from air, which can effectively prevent the battery cell from being bumped or rubbed, improve the stability of the battery pack, and reduce the probability of leakage failure of the battery pack.

[0094] Although the preferred embodiments of the utility model embodiments have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the utility model embodiments.

[0095] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0096] The battery pack, battery package and electrical device provided by the present invention are introduced in detail above. The principle and implementation mode of the present invention are explained by using specific examples in this article. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A battery pack, characterized in that: include: At least one battery cell and a buffer, wherein The battery cell has two protrusions on its first side, the protrusions protrude from the first side of the battery cell along a first direction, and the two protrusions are respectively arranged at two ends of the battery cell in a second direction, and the second direction is perpendicular to the first direction; The buffer is connected to the first side of the battery cell, at least a portion of the buffer is disposed in a gap between two protrusions, and a thickness of the buffer in the first direction is greater than a height of the protrusion in the first direction.

2. The battery pack according to claim 1, characterized in that: The compression amount of the buffer member is the ratio of the thickness of the buffer member after compression to the thickness of the buffer member before compression, the minimum compression amount of the buffer member is A, and the height of the protrusion in the first direction is H; A thickness δ1 of the buffer member in the first direction is ≥H / A, wherein 0<A<1.

3. The battery pack according to any one of claims 1 to 2, characterized in that: The number of the buffer members includes at least one, and the buffer members are arranged in a one-to-one correspondence with the battery cells; An orthographic projection of the buffer member along the first direction falls within an orthographic projection of the corresponding battery cell along the first direction.

4. The battery pack according to claim 3, characterized in that: The width of the battery cell in the second direction is W2; The length of the buffer in the second direction is L1=W2-4mm.

5. The battery pack according to claim 3, characterized in that: The thickness of the battery cell in the third direction is δ2, the width of the buffer in the third direction is W1, the third direction intersects with the second direction, and a plane formed by the third direction and the second direction is perpendicular to the first direction; δ2-0.3mm≤W1≤δ2.

6. The battery pack according to any one of claims 1 to 2, characterized in that: The number of the buffer member includes one, the number of the battery cells is N, and N ≥ 2; The N battery cells are stacked along a third direction, the third direction intersects with the second direction, and a plane formed by the third direction and the second direction is perpendicular to the first direction; The buffer members are respectively connected to the first sides of the N battery cells.

7. The battery pack according to claim 6, characterized in that: The thickness of the battery cell in the third direction is δ2, and the length of the buffer in the third direction is L2; N*δ2-0.3mm≤L2≤N*δ2.

8. The battery pack according to claim 6, characterized in that: The width of the battery cell in the second direction is W2; The width of the buffer in the second direction is W3 = W2 - 4 mm.

9. The battery pack according to claim 1, characterized in that: The buffer component includes one of foam, sponge and rubber pad.

10. The battery pack according to claim 1, characterized in that: The buffer is adhesively connected to the first side of the battery cell.

11. A battery pack, characterized in that: A battery pack comprising any one of claims 1 to 10.

12. An electrical device, characterized in that: Comprising the battery pack according to any one of claims 1 to 10 or the battery pack according to claim 11.

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