Battery assembly and electric equipment

Abstract

The utility model provides a battery assembly and electric equipment. The battery assembly comprises a battery cell, a packaging piece and a sensing protection device. The battery cell comprises a battery cell body. And the packaging piece is packaged outside the battery cell body. The package includes a top sealing edge. The top sealing edge comprises a main body part. The main body part is flatly laid on the surface, facing outwards in the first direction, of the battery cell body. The sensing protection device is arranged on one side, far away from the battery cell body, of the main body part along the first direction; the size of the sensing protection device in the first direction is smaller than the size of the sensing protection device in the second direction. And the size of the sensing protection device in the first direction is smaller than that of the sensing protection device in the third direction. Any two of the first direction, the second direction and the third direction intersect. According to the utility model, the size ratio of the battery cell body can be increased, so that the energy density of the battery assembly is improved.

Description

Technical Field

[0001] The utility model generally relates to the technical field of batteries, and more specifically to a battery assembly and an electrical device. Background Art

[0002] The battery assembly in the related art includes a battery cell and a sensor protection device. The sensor protection device is usually used to detect the temperature, pressure and other parameters inside the battery cell. The sensor protection device is generally arranged on the side of the packaging edge of the battery cell where the tab protrudes. Among them, the packaging edge of the battery cell where the tab protrudes can usually be called the top sealing edge.

[0003] However, the top sealing edge and sensor protection device in the related art will occupy the space of the battery cell, thereby reducing the size proportion of the battery cell body and reducing the unit volume capacity of the battery cell body, thereby reducing the energy density of the battery assembly. Utility Model Content

[0004] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0005] In order to at least partially solve the above problems, the first aspect of the present invention provides a battery assembly, the battery assembly comprising:

[0006] A packaging component, wherein the packaging component is packaged outside the battery cell body, the packaging component comprises a top sealing edge, the top sealing edge comprises a main body, and the main body is flatly arranged on a surface of the battery cell body facing outward in a first direction; and

[0007] A sensor protection device, wherein the sensor protection device is arranged on a side of the main body along the first direction away from the battery body, the size of the sensor protection device in the first direction is smaller than the size of the sensor protection device in the second direction, and the size of the sensor protection device in the first direction is smaller than the size of the sensor protection device in the third direction, and any two of the first direction, the second direction and the third direction intersect.

[0008] According to the battery assembly of the first aspect of the utility model, by laying the main body of the top seal of the packaging component on the surface of the battery body, the sensor protection device is arranged on the side of the main body along the first direction away from the battery body, and the size of the sensor protection device in the first direction is smaller than the size of the sensor protection device in the second direction and smaller than the size of the sensor protection device in the third direction, so that the space occupied by the sensor protection device and the top seal in the first direction of the battery cell can be reduced, thereby reducing the size of the combination of the battery cell and the sensor protection device in the first direction. By adopting the above technical means, the battery assembly of the utility model can increase the size proportion of the battery body, thereby increasing the unit volume capacity of the battery body, and thus helping to increase the energy density of the battery assembly.

[0009] Optionally, the battery cell further includes a first pole ear, a root end of the first pole ear being connected to the battery cell body, a free end of the first pole ear being connected to a surface of the main body along the first direction away from the battery cell body, and a free end of the first pole ear being connected to the sensor protection device.

[0010] Optionally, the sensor protection device is a temperature switch, and the temperature switch comprises a switch body, a first pin and a second pin, and the first pin is connected to the free end of the first pole ear;

[0011] The battery assembly also includes:

[0012] A protection plate is located at one side of the battery cell body along the first direction, and the protection plate includes a first connecting portion connected to the second pin.

[0013] Optionally, the protection plate includes a second connecting portion;

[0014] The battery cell further includes a second pole tab, the polarity of the second pole tab is opposite to the polarity of the first pole tab, and a free end of the second pole tab is connected to the second connecting portion.

[0015] Optionally, the battery assembly includes a first connecting plate and a second connecting plate, the first connecting plate is connected to the first pin, the second connecting plate includes a first sheet body and a second sheet body connected to each other, the first sheet body and the second sheet body are connected at an angle, the first sheet body is connected to the second pin, and the second sheet body is connected to the first connecting portion.

[0016] Optionally, the battery assembly further includes:

[0017] A bottom shell is formed with a receiving groove, and the battery cell body and the sensor protection device are received in the receiving groove.

[0018] Optionally, the battery assembly further includes:

[0019] A bottom shell is formed with a receiving groove, and the battery cell body, the temperature switch and the first sheet of the second connecting sheet are received in the receiving groove.

[0020] Optionally, the battery cell further includes:

[0021] a first insulating layer, the first insulating layer being disposed between the main body and the battery cell body; and / or

[0022] A second insulating layer is disposed on a surface of the main body along the first direction away from the battery cell body.

[0023] Optionally, the first electrode tab includes a bent portion, and the bent portion is located on a side of the main body along the first direction away from the battery cell body.

[0024] Optionally, the first insulating layer is constructed as an insulating tape with adhesive on both sides; and / or

[0025] The second insulating layer is configured as an insulating tape with adhesive on one side.

[0026] A second aspect of the utility model provides an electrical device, wherein the electrical device comprises the above-mentioned battery assembly.

[0027] According to the electrical equipment of the second aspect of the utility model, by applying the above-mentioned battery assembly, better battery life performance can be obtained, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0029] Figure 1 It is a structural schematic diagram of a battery assembly according to a preferred embodiment of the utility model;

[0030] Figure 2 for Figure 1 An enlarged view of part I in FIG.

[0031] Figure 3 for Figure 1 An enlarged view of part II in FIG.

[0032] Figure 4 for Figure 1 An exploded perspective view of a battery assembly is shown;

[0033] Figure 5 for Figure 4 an enlarged view of section III in FIG. 1 ; and

[0034] Figure 6 It is a schematic diagram of a sensor protection device according to a preferred embodiment of the utility model.

[0035] Description of reference numerals:

[0036] 100: Battery components

[0037] 110: Battery cell 111: Battery cell body

[0038] 112: first electrode tab 112b: bent portion

[0039] 113: Second pole ear 114: Package

[0040] 115: Top sealing edge 115a: Main body

[0041] 115b: end 116: side sealing

[0042] 117: first insulating layer 118: second insulating layer

[0043] 120: Sensor protection device, temperature switch 121: Switch body

[0044] 122: First pin 123: Second pin

[0045] 124: first connecting piece 125: second connecting piece

[0046] 125a: first sheet 125b: second sheet

[0047] 130: protection plate 131: first connection portion

[0048] 132: Second connection portion 140: Bottom shell

[0049] 141: Accommodating groove D1: First direction

[0050] D2: Second direction D3: Third direction DETAILED DESCRIPTION

[0051] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0052] In order to fully understand the implementation of the present invention, a detailed structure will be presented in the following description. Obviously, the implementation of the implementation of the present invention is not limited to the specific details familiar to those skilled in the art.

[0053] It should be understood that the purpose of the terms used herein is only to describe specific embodiments and is not intended to limit the present invention, and the singular forms "a", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. When the terms "comprise" and / or "include" are used in this specification, it indicates the presence of the features, integral bodies, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integral bodies, steps, operations, elements, components and / or combinations thereof.

[0054] Ordinal numbers such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meaning, such as a specific order. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component". It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inner", "outer" and similar expressions used in the present invention are for illustrative purposes only and are not limiting.

[0055] The "parallel" / "vertical" and similar expressions used in the present invention include an absolute parallel / vertical relationship and a roughly parallel / vertical relationship (for example, a relationship that differs from absolute parallel / vertical by -5° to +5°), which can have the same effect.

[0056] Hereinafter, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings. These drawings show representative embodiments of the present invention and are not intended to limit the present invention.

[0057] Batteries are widely used in people's lives and work. For example, lithium-ion batteries are often used in various electronic devices such as mobile phones, cameras, notebooks and tablets to provide power for electronic devices. Lithium-ion batteries include steel-shell lithium batteries and soft-pack lithium batteries. Taking soft-pack lithium batteries as an example, soft-pack lithium batteries include a battery body. The battery body has a pole ear extending outward. A packaging component is packaged on the battery body to package the battery body, and only the pole ear on the battery is led out to connect with other circuit structures of the electronic device. Usually, the packaging component includes a containing area for sealing the battery body and a packaging edge located around the containing area. Among them, the packaging edge with the pole ear extending is usually called a top seal. Two side seals are perpendicular to the top seal and located on both sides of the containing area. Among them, the extension direction of the top seal is consistent with the extension direction of the pole ear. The top seal is perpendicular to the top surface of the battery. In the battery assembly suitable for the soft-pack lithium battery, a temperature switch is also provided. The temperature switch is installed in a posture where the thickness direction of the temperature switch is parallel to or nearly parallel to the third direction of the battery assembly.

[0058] However, the top seal and the temperature switch occupy a large space in the length direction of the battery assembly, which will reduce the size ratio of the battery cell body and reduce the unit volume capacity of the battery cell body, thereby reducing the energy density of the battery.

[0059] In order to solve the above problems, the utility model provides a battery assembly.

[0060] The following will refer to Figures 1 to 6 The example shown is used to explain the battery assembly according to the present invention in detail.

[0061] The battery assembly according to the utility model may include a battery cell 110, a package 114 and a sensor protection device 120. The battery cell 110 may include a battery cell body 111 and a first pole ear 112. The root end of the first pole ear 112 is connected to the battery cell body 111. The package 114 is packaged outside the battery cell body 111. The package 114 includes a top seal 115 and side seals 116 located on opposite sides of the top seal 115. The side seals 116 here are located on the side of the top seal 115 along the second direction D2 of the battery cell 110. The top seal 115 may include a main body 115a and end portions 115b located on both sides of the main body 115a. The main body 115a is flatly arranged on the top surface of the battery cell body 111. The end portion 115b is connected to the side seal 116. The free end of the first pole ear 112 is connected to the surface of the main body 115a away from the battery cell body 111 along the first direction D1 of the battery cell 110. The sensing protection device 120 is, for example, a temperature switch 120. The temperature switch 120 is connected to a side of the main body 115a away from the battery cell body 111 along the first direction D1 of the battery cell 110. One end of the temperature switch 120 is connected to the free end of the first pole ear 112. The size of the sensing protection device 120 in the first direction D1 is smaller than the size of the sensing protection device 120 in the second direction D2. And the size of the sensing protection device 120 in the first direction D1 is smaller than the size of the sensing protection device 120 in the third direction D3. Any two of the first direction D1, the second direction D2, and the third direction D3 intersect.

[0062] The size of the sensor protection device 120 in the first direction D1 can be understood as the maximum size of the sensor protection device 120 in the first direction D1. The size of the sensor protection device 120 in the second direction D2 can be understood as the maximum size of the sensor protection device 120 in the second direction D2. The size of the sensor protection device 120 in the third direction D3 can be understood as the maximum size of the sensor protection device 120 in the third direction D3.

[0063] According to the battery assembly 100 of the utility model, by laying the main body 115a of the top sealing edge 115 of the packaging member 114 on the surface facing outward in the first direction D1 of the battery cell body 111, the temperature switch 120 is arranged on the outside of the top sealing edge 115 in a posture of "the size of the sensor protection device 120 in the first direction D1 is smaller than the size of the sensor protection device 120 in the second direction D2, and the size of the sensor protection device 120 in the first direction D1 is smaller than the size of the sensor protection device 120 in the third direction D3", so that the space occupied by the temperature switch 120 and the top sealing edge 115 in the first direction D1 of the battery cell 110 can be reduced, thereby reducing the size of the combination of the battery cell 110 and the temperature switch 120 in the first direction D1 of the battery cell. By adopting the above technical means, the battery assembly 100 of the utility model can increase the size proportion of the battery cell body 111, thereby increasing the unit volume capacity of the battery cell body 111, and thus helping to increase the energy density of the battery assembly 100.

[0064] In one example, the thickness direction of the temperature switch 120 is parallel to the first direction D1 , the length direction of the temperature switch is parallel to the second direction D2 , and the width direction of the temperature switch is parallel to the third direction D3 .

[0065] See also Figure 1 , Figure 2 as well as Figures 4 to 6 For example, the temperature switch 120 may include a switch body 121, a first pin 122, and a second pin 123. The first pin 122 is conductively connected to the free end of the first pole ear 112. The battery assembly 100 may also include a protection plate 130. The protection plate 130 is located on one side of the battery body 111 along the first direction D1 of the battery cell 110. A first connecting portion 131 is provided on the top of the protection plate 130. The first connecting portion 131 is conductively connected to the second pin 123. Here, the first pole ear 112 is connected through the first pin 122 of the temperature switch 120, and the second pin 123 of the temperature switch 120 is connected to the first connecting portion 131 on the protection plate 130, so as to realize the electrical connection between the first pole ear 112 of the battery cell 110 and the protection plate 130 through the temperature switch 120. Some circuit structures are usually arranged in the protection plate 130, which are conductively connected to the first connecting portion 131 and are suitable for realizing the series connection and / or parallel connection of each battery cell 110.

[0066] exist Figure 6 In the example shown, the first pin 122 and the second pin 123 are located at both ends of the length direction of the temperature switch 120. In other words, the first pin 122 and the second pin 123 are located at both ends of the temperature switch 120 along the second direction D2.

[0067] See also Figures 1 to 5, further, a second connection portion 132 is provided on the top of the protection plate 130. The battery cell 110 may include a second pole ear 113. The free end of the second pole ear 113 is extended along the first direction D1 of the battery cell. The free end of the second pole ear 113 is connected to the second connection portion 132 of the protection plate 130. The battery assembly 100 may include a first connecting sheet 124 and a second connecting sheet 125. The first connecting sheet 124 is connected to the first pin 122. The second connecting sheet 125 may include a first sheet 125a and a second sheet 125b connected to each other. The first sheet 125a and the second sheet 125b are arranged to intersect. The first sheet 125a is connected to the second pin 123. The second sheet 125b is connected to the first connection portion 131. The thickness direction of the first sheet 125a and the thickness direction of the first connecting sheet 124 are parallel to the first direction D1 of the battery cell. Here, the connection between the first pin 122 and the first tab 112 is realized by the first connecting piece 124, which can better meet the assembly requirements of the temperature switch 120 and the first tab 112 when the temperature switch 120 is installed in different positions. For example, when the distance between the temperature switch 120 and the first tab 112 is large. The second connecting piece 125 is connected to the second pin 123 through the first sheet 125a, and is connected to the second connecting portion 132 through the second sheet 125b, so that the temperature switch 120 can meet the assembly requirements in different installation spaces.

[0068] See also Figures 1 to 6 , further, the second sheet 125b is connected to the upper part of the first sheet 125a. And the first sheet 125a and the first connecting sheet 124 are coplanar. By arranging the second sheet 125b on the upper part of the first sheet 125a and arranging the first sheet 125a and the first connecting sheet 124 coplanarly, it is helpful to reduce the excessive occupation of space when there is a height difference between the first sheet 125a and the first connecting sheet 124 in the third direction D3 of the battery cell, thereby facilitating the compactness of the structure of the battery assembly 100 in the third direction D3 of the battery cell.

[0069] exist Figure 6 In the example shown, the temperature switch 120 may include the first connection piece 124 and the second connection piece 125 . That is, the first connection piece 124 and the second connection piece 125 are integrated into the temperature switch 120 .

[0070] See also Figures 1 to 5 Optionally, the first connection portion 131 and the second connection portion 132 may be welding pads for welding the second connection piece 125 to the first connection portion 131 and for welding the second electrode tab 113 to the second connection portion 132 .

[0071] Continue reading Figures 1 to 5In addition, the battery assembly 100 may further include a bottom shell 140. A receiving groove 141 is formed at the upper portion of the bottom shell 140. The opening of the receiving groove 141 is arranged upward in the third direction D3 of the battery cell. The battery cell body 111 and the temperature switch 120 are accommodated in the receiving groove 141. On the basis of adopting the above-mentioned technical means, compared with the related art, the size of the receiving groove 141 in the first direction D1 of the battery cell can be smaller, which is conducive to the miniaturization of the size of the battery assembly 100 in the first direction D1 of the battery cell.

[0072] See also Figures 1 to 5 For example, the battery cell body 111 , the temperature switch 120 and the first sheet 125 a of the second connecting sheet 125 are accommodated in the receiving groove 141 to accommodate, position and protect the battery cell body 111 , the temperature switch 120 and the first sheet 125 a of the second connecting sheet 125 .

[0073] See also Figures 1 to 5 In addition, the battery cell 110 may further include a first insulating layer 117 and a second insulating layer 118. The first insulating layer 117 is attached between the main body 115a and the top surface of the battery cell body 111. The thickness direction of the first insulating layer 117 is parallel to the first direction D1 of the battery cell. The second insulating layer 118 is attached to the surface of the main body 115a away from the first insulating layer 117 along the first direction D1 of the battery cell. The thickness direction of the second insulating layer 118 is parallel to the length direction. By providing the first insulating layer 117, the main body 115a and the top surface of the battery cell body 111 can be isolated. When the top sealing edge 115 of the package 114 is bent during the production process, the first insulating layer 117 is also helpful to prevent the top sealing edge 115 from directly and rigidly contacting the top surface of the battery cell body 111 and damaging the battery cell body 111. By providing the second insulating layer 118, the main body 115a and other structures can be isolated. Here, the first insulating layer 117 and the second insulating layer 118 can be made of insulating materials.

[0074] See also Figures 1 to 5For example, the first pole lug 112 may include a bending portion 112b. The bending portion 112b is located on a side of the main body 115a away from the battery cell body 111 along the first direction D1. It can be understood that the bending portion 112b is configured as a bent portion of the first pole lug 112. The bending portion 112b and the main body 115a are arranged in a stacked manner in the first direction D1. For example, the bending portion 112b constitutes the free end of the first pole lug 112. By providing the bending portion 112b stacked with the main body 115a along the first direction D1 of the battery cell on the first pole lug 112, the size of the first pole lug 112 in the first direction D1 of the battery cell 110 can be reduced, thereby reducing the occupation of the first pole lug 112 by the external space of the battery cell body 111, which is ultimately conducive to reserving more space for accommodating the temperature switch 120. When the thickness direction of the temperature switch 120 is arranged to be parallel to the first direction D1 of the battery cell, the space required for the portion of the battery cell 110 suitable for being accommodated in the accommodating groove 141 in the first direction D1 of the battery cell can be effectively reduced, thereby further reducing the size of the accommodating groove 141 in the first direction D1 of the battery cell 110, and further reducing the size of the battery assembly 100 in the first direction D1 of the battery cell.

[0075] See also Figures 1 to 5 Furthermore, a second insulating layer 118 is provided between the bent portion 112b and the main body portion 115a to achieve isolation between the surfaces of the bent portion 112b and the main body portion 115a facing each other.

[0076] Optionally, the first insulating layer 117 is configured as an insulating tape with adhesive on both sides, and the second insulating layer 118 is configured as an insulating tape with adhesive on one side.

[0077] See also Figures 1 to 6 The manufacturing method of the battery assembly 100 of the utility model may include:

[0078] Step one, attaching a double-sided insulating tape with adhesive on the top surface of the battery cell body 111 as the first insulating layer 117, so as to avoid the risk of damage to the battery cell body 111 during the process of bending the top sealing edge 115 of the package 114 toward the top surface of the battery cell body 111, and on the other hand, the folded top sealing edge 115 can be firmly bonded to prevent rebound, so as to play the role of fixing the top sealing edge 115 and insulating protection.

[0079] Step 2: Fold the top sealing edge 115 back and fit it with the insulating tape, and ensure that the folded top sealing edge 115 fits flat.

[0080] Step three, affix an insulating tape with adhesive on one side to the surface of the folded top sealing edge 115 facing away from the battery cell body 111 to insulate and protect the battery cell body 111 and the top sealing edge 115, thereby avoiding damage to the battery cell 110 and the risk of short circuit when the battery cell 110 and the protective plate 130, the outer shell including the bottom shell 140 and other structures are assembled.

[0081] Step 4: Shape the first pole tab 112 and the second pole tab 113 of the battery cell 110 so that the shape of the first pole tab 112 can match the welding with the first connecting portion 131 through the temperature switch 120 , and the shape of the second pole tab 113 can match the welding with the second connecting portion 132 .

[0082] Step 5: laser spot weld the temperature switch 120 to the first connection portion 131 of the protection plate 130 through the second connection sheet 125, and laser weld the second electrode tab 113 to the second connection portion 132 of the protection plate 130. The same protection plate 130 can connect multiple cells 110 side by side along the second cell direction D2.

[0083] Step six: Assemble the combination of the protection plate 130 and the plurality of battery cells 110 with other structures including the bottom case 140 to form a final battery assembly 100 .

[0084] In the above content, the first electrode tab 112 may be a positive electrode tab, and the second electrode tab 113 may be a negative electrode tab.

[0085] The utility model also provides an electric device, which may be a vehicle, a vehicle-mounted electronic device or other device that requires electricity, and may include the battery assembly 100 described above.

[0086] According to the electric device of the present invention, by applying the above-mentioned battery assembly, better battery life performance can be obtained, thereby improving the user experience.

[0087] According to the battery assembly 100 of the present invention, by adopting the above technical means, the volume of the battery assembly 100 can be effectively reduced, thereby improving the energy density of the battery assembly 100.

[0088] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "setting" appearing in this article may indicate that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0089] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of the protection claimed by the utility model.

Claims

1. A battery assembly, characterized in that: The battery assembly comprises: A battery cell, wherein the battery cell comprises a battery cell body; A packaging component, wherein the packaging component is packaged outside the battery cell body, the packaging component comprises a top sealing edge, the top sealing edge comprises a main body, and the main body is flatly arranged on a surface of the battery cell body facing outward in a first direction; and A sensor protection device, wherein the sensor protection device is arranged on a side of the main body along the first direction away from the battery body, the size of the sensor protection device in the first direction is smaller than the size of the sensor protection device in the second direction, and the size of the sensor protection device in the first direction is smaller than the size of the sensor protection device in the third direction, and any two of the first direction, the second direction and the third direction intersect.

2. The battery assembly according to claim 1, characterized in that: The battery cell further includes a first pole lug, a root end of which is connected to the battery cell body, a free end of which is connected to a surface of the main body away from the battery cell body along the first direction, and a free end of which is connected to the sensor protection device.

3. The battery assembly according to claim 2, characterized in that: The sensor protection device is a temperature switch, and the temperature switch comprises a switch body, a first pin and a second pin, wherein the first pin is connected to the free end of the first pole ear; The battery assembly also includes: A protection plate is located at one side of the battery cell body along the first direction, and the protection plate includes a first connecting portion connected to the second pin.

4. The battery assembly according to claim 3, characterized in that: The protection plate includes a second connecting portion; The battery cell further includes a second pole tab, the polarity of the second pole tab is opposite to the polarity of the first pole tab, and a free end of the second pole tab is connected to the second connecting portion.

5. The battery assembly according to claim 4, characterized in that: The battery assembly includes a first connecting piece and a second connecting piece, the first connecting piece is connected to the first pin, the second connecting piece includes a first sheet body and a second sheet body connected to each other, the first sheet body and the second sheet body are connected at an angle, the first sheet body is connected to the second pin, and the second sheet body is connected to the first connecting portion.

6. The battery assembly according to any one of claims 1 to 5, characterized in that: The battery assembly also includes: A bottom shell is formed with a receiving groove, and the battery cell body and the sensor protection device are received in the receiving groove.

7. The battery assembly according to claim 5, characterized in that: The battery assembly also includes: A bottom shell is formed with a receiving groove, and the battery cell body, the temperature switch and the first sheet of the second connecting sheet are received in the receiving groove.

8. The battery assembly according to any one of claims 2 to 5, characterized in that: The battery cell also includes: a first insulating layer, the first insulating layer being disposed between the main body and the battery cell body; and / or A second insulating layer is disposed on a surface of the main body along the first direction away from the battery cell body.

9. The battery assembly according to claim 8, characterized in that: The first electrode tab includes a bent portion, and the bent portion is located on a side of the main body along the first direction away from the battery cell body.

10. The battery assembly according to claim 8, characterized in that: The first insulating layer is configured as an insulating tape with adhesive on both sides; and / or The second insulating layer is configured as an insulating tape with adhesive on one side.

11. An electrical device, characterized in that: The electrical equipment comprises the battery assembly according to any one of claims 1 to 10.

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