A battery module, a battery pack and an electric device

Abstract

The utility model provides a kind of battery module, battery pack and electric equipment, battery module includes multiple batteries and busbar, multiple batteries, battery includes shell, battery cell, top cover and connecting piece, connecting piece is arranged in top cover to and battery cell electric connection, and at least part connecting piece extends to the side of top cover deviating from battery cell;And, busbar is connected with the connecting piece of at least two batteries, to make top cover be clamped between busbar and connecting piece.Using the electric equipment, since at least part connecting piece extends to the side of top cover deviating from battery cell, therefore, when two adjacent battery cells are connected, busbar can be directly connected with connecting piece, so as to clamp top cover between busbar and connecting piece, so that connecting piece is fixed on top cover, compared with conventional technology, the setting of riveting block is cancelled, busbar and connecting piece can be directly connected without riveting block, the number of parts in battery module can be reduced, so as to reduce assembly difficulty, improve assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery module, a battery pack, and an electrical device. Background Technology

[0002] In related technologies, battery modules are composed of multiple individual cells. The top cover assembly of an individual cell includes a top cover, connecting pieces, and terminals. Adjacent cells are connected through the connecting pieces and terminals. In the top cover assembly, rivet blocks are used to ensure the connection between the connecting pieces and terminals. Finally, the busbar is connected to the rivet blocks in the two individual cells to realize the series or parallel connection of the two cells. However, this connection method requires many parts to be installed, is cumbersome to assemble, and has low installation efficiency. Utility Model Content

[0003] The embodiments of this utility model provide a battery module, a battery pack, and an electrical device, which can improve the technical problems of the connection method requiring many parts to be installed, complicated assembly, and low installation efficiency.

[0004] In a first aspect, embodiments of the present invention provide a battery module comprising:

[0005] A plurality of batteries, each battery comprising a housing, a cell, a top cover, and a connector, wherein the housing has a mounting cavity and an opening, the cell is disposed within the mounting cavity, the top cover is connected to the housing to close the opening, and the connector passes through the top cover to be electrically connected to the cell, and at least a portion of the connector extends to the side of the top cover opposite to the cell; and,

[0006] A busbar, which is connected to the connectors of at least two of the batteries, such that the top cover is sandwiched between the busbar and the connectors.

[0007] In one embodiment, the busbar includes a welded portion, which is welded and fixed to the connector.

[0008] In one embodiment, the busbar has a groove with the groove opening facing away from the connector, and the bottom wall of the groove forms at least a portion of the welded portion.

[0009] In one embodiment, the bottom wall surface of the groove is configured as a rough surface.

[0010] In one embodiment, the battery further includes a first insulating member, at least a portion of the connector passing through the first insulating member, the first insulating member being sandwiched between the busbar and the top cover for insulation between the side of the top cover away from the cell and the connector.

[0011] In one embodiment, the connector includes a first connecting portion, a terminal portion, and a second connecting portion. The top cover has a connecting hole, the terminal portion passes through the connecting hole, and the terminal portion is connected between the first connecting portion and the second connecting portion, such that the first connecting portion and the second connecting portion are located on both sides of the connecting hole. The first connecting portion is used to connect another single battery cell, and the second connecting portion extends along the surface of the top cover and is used to connect a tab.

[0012] In one embodiment, the connector includes a main body and a protrusion connected in sequence. The main body and the protrusion are integrally formed. The main body is located on one side of the inner surface of the top cover for connecting a tab. The protrusion passes through the top cover. One end of the protrusion away from the main body is flush with the outer surface of the top cover. Alternatively, one end of the protrusion away from the main body protrudes from the outer surface of the top cover for connecting another single battery cell.

[0013] In one embodiment, the battery further includes a second insulating member, at least a portion of the connector passing through the second insulating member, the second insulating member being sandwiched between the connector and the top cover for insulation between the side of the top cover near the cell and the connector.

[0014] In one embodiment, the battery module further includes a sealing ring disposed between the first insulating member and the second insulating member, and the sealing ring is disposed between the top cover and the connector for sealing and fixing the top cover and the connector.

[0015] In one embodiment, the busbar has a recess that is recessed along the thickness direction of the busbar.

[0016] Secondly, embodiments of the present invention provide a battery pack, which includes the battery module as described above.

[0017] Thirdly, embodiments of this utility model provide an electrical device that includes the battery pack described above.

[0018] The beneficial effects of the embodiments of this utility model are as follows:

[0019] Since at least part of the connector extends to the side of the top cover away from the battery cell, the busbar can be directly connected to the connector when two adjacent battery cells are connected. This clamps the top cover between the busbar and the connector, thus fixing the connector to the top cover. Compared to traditional technology, this eliminates the need for rivet blocks, allowing the busbar to be directly connected to the connector without rivet blocks. This reduces the number of components in the battery module, thereby reducing assembly difficulty and improving assembly efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the battery module provided in an embodiment of this utility model;

[0022] Figure 2 It is at Figure 1 The diagram shows the structure of the busbar in the battery module.

[0023] Figure 3 This is a first structural schematic diagram of the connecting piece provided in an embodiment of the present utility model;

[0024] Figure 4 This is a partial structural schematic diagram of the battery module provided in an embodiment of this utility model;

[0025] Figure 5 This is a cross-sectional view of the battery module provided in an embodiment of this utility model;

[0026] Figure 6 It is at Figure 5 A magnified view of a section at point A;

[0027] Figure 7 This is a partial cross-sectional view of the battery module provided in an embodiment of this utility model;

[0028] Figure 8 This is a schematic diagram of the second structure of the connecting piece provided in an embodiment of this utility model;

[0029] Figure 9 This is a partial structural schematic diagram of another battery module provided in an embodiment of this utility model;

[0030] Figure 10 A cross-sectional view of another battery module provided in an embodiment of this utility model;

[0031] Figure 11 It is at Figure 10 A magnified view of section B;

[0032] Figure 12 This is a partial cross-sectional view of another battery module provided in an embodiment of this utility model.

[0033] Marked in the image:

[0034] 1. Battery module;

[0035] 11. Shell;

[0036] 12. Top cover; 121. Connecting hole;

[0037] 13. Connector; 131. First connecting part; 132. Pole post part; 133. Second connecting part; 134. Main body part; 135. Protrusion part; 1351. Side wall; 1352. Top wall;

[0038] 14. Busbar; 141. Welded section; 142. Groove; 143. Recess;

[0039] 15. First insulating element; 151. First insulating part; 152. First sealing part;

[0040] 16. Second insulating element; 161. Second insulating part; 162. Second sealing part;

[0041] 17. Sealing ring. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0043] Reference Figure 1 As shown, this utility model embodiment provides a battery module 1, which includes multiple batteries and a busbar 14. The multiple batteries include a housing 11, a cell, a top cover 12, and a connector 13. The housing 11 has a mounting cavity and an opening. The cell is disposed in the mounting cavity. The top cover 12 is connected to the housing 11 to close the opening. The connector 13 passes through the top cover 12 to be electrically connected to the cell, and at least a portion of the connector 13 extends to the side of the top cover 12 away from the cell. The busbar 14 is connected to the connector 13 of at least two batteries, such that the top cover 12 is sandwiched between the busbar 14 and the connector 13.

[0044] Since at least part of the connector 13 extends to the side of the top cover 12 away from the battery cell, when two adjacent battery cells are connected, the busbar 14 can be directly connected to the connector 13, thereby clamping the top cover 12 between the busbar 14 and the connector 13, so that the connector 13 is fixed on the top cover 12. Compared with the traditional technology, the setting of the rivet block is eliminated, and the busbar 14 and the connector 13 can be directly connected without the need for the rivet block. This can reduce the number of parts in the battery module 1, thereby reducing the assembly difficulty and improving the assembly efficiency.

[0045] In some embodiments, refer to Figure 2 As shown, the busbar 14 includes a welding part 141, which is welded and fixed to the connector 13.

[0046] Thus, by setting the welding part 141, the welding position between the busbar 14 and the connecting piece can be quickly located, thereby achieving a more precise connection.

[0047] In some embodiments, refer to Figure 2 As shown, the busbar 14 is provided with a groove 142, the groove opening of the groove 142 faces away from the connector 13, and the bottom wall of the groove 142 forms at least a partial welded part 141.

[0048] In this way, the thickness of the weld portion 141 on the busbar 14 can be reduced, that is, a "thin" area can be formed on the busbar 14. Therefore, the groove 142 makes it easier for the welding laser to pass through the busbar 14, so that a lower power welding equipment can be used when welding the busbar 14 to the battery cell.

[0049] In addition, the groove 142 provides a clear path for the welding laser, ensuring that the laser can accurately irradiate the welding part 141, avoiding laser deflection or scattering, thereby improving the accuracy and quality of welding.

[0050] In addition, the groove 142 provides physical guidance for the welding operation, reduces the skill requirements for operators, makes the welding process easier to control, and improves production efficiency.

[0051] In some embodiments, refer to Figure 2 As shown, the bottom wall surface of the groove 142 is configured as a rough surface.

[0052] By configuring the bottom wall surface of the groove 142 as a rough surface, the reflection of the groove 142 during laser welding can be reduced, thereby achieving better welding.

[0053] In some embodiments, the battery further includes a first insulating member 15, at least a portion of the connector 13 passing through the first insulating member 15, the first insulating member 15 being sandwiched between the busbar 14 and the top cover 12 for insulation between the side of the top cover 12 away from the battery cell and the connector 13.

[0054] This reduces the occurrence of short circuits between busbar 14 and top cover 12, ensuring battery safety.

[0055] In some embodiments, refer to Figure 3 and Figure 4 As shown, the connector 13 includes a first connecting portion 131, a terminal portion 132, and a second connecting portion 133. The top cover 12 is provided with a connecting hole 121. The terminal portion 132 passes through the connecting hole 121 and is connected between the first connecting portion 131 and the second connecting portion 133, so that the first connecting portion 131 and the second connecting portion 133 are located on both sides of the connecting hole 121, respectively. The first connecting portion 131 is used to connect another single battery cell, and the second connecting portion 133 extends along the surface of the top cover 12 and is used to connect a tab.

[0056] In this embodiment, since the connecting piece includes a terminal post 132, a first connecting part 131, and a second connecting part 133, the same connecting piece can serve as both a terminal post connecting to a tab and a connecting part to another single battery cell, thereby reducing the number of parts in the top cover 12 assembly and facilitating assembly. Furthermore, the terminal post 132 passes through the connecting hole 121, so that the first connecting part 131 and the second connecting part 133 are located on both sides of the connecting hole 121, thereby enabling quick connection between the connecting piece and the top cover 12. In addition, the second connecting part 133 extends along the surface of the top cover 12 and is used to connect to the tab, which increases the connection area between the second connecting part 133 and the tab, and reduces the space occupied inside the battery, thereby increasing the battery capacity.

[0057] In one embodiment, reference is made to Figures 5 to 7 As shown, at least a portion of the pole post 132 passes through the first insulating member 15. The first insulating member 15 includes a first insulating portion 151 and a first sealing portion 152. The first insulating portion 151 is disposed between the first connecting portion 131 and the top cover 12, and the first sealing portion 152 is disposed between the inner circumferential surface of the connecting hole 121 and the pole post 132.

[0058] In some embodiments, the first insulating portion 151 and the first sealing portion 152 are integrally formed.

[0059] In this way, the integral molding of the first insulating part 151 and the first sealing part 152 reduces complex process steps such as welding, bonding or assembly, thereby reducing manufacturing difficulty and cost. At the same time, it reduces quality problems caused by process defects (such as poor bonding or welding).

[0060] In addition, the one-piece molded first insulating component 15 can be produced directly, reducing subsequent assembly processes, improving production efficiency, and shortening the production cycle.

[0061] In one example, the material of the first insulating member 15 may be, but is not limited to, plastic. In one example, the materials of the first insulating portion 151 and the first sealing portion 152 may be the same or different.

[0062] In some embodiments, the first insulating member 15 is an adhesive member used to bond and fix the top cover 12 to the connecting piece.

[0063] Accordingly, the first insulating component 15 not only serves as an insulator, but also achieves the effect of bonding and fixing the top cover 12 and the connecting piece, thereby ensuring the insulating connection and fixing effect between the top cover 12 and the connecting piece.

[0064] It should also be noted that in this embodiment, the connecting piece passes through the top cover 12 by bending, thereby achieving a quick connection with the top cover 12.

[0065] It is understood that in this embodiment, there are two connecting pieces, and the two connecting pieces are spaced apart along the length of the top cover 12 to connect the positive and negative tabs of the battery cell. Correspondingly, there are also two connecting holes 121 to connect to the two connecting pieces one by one.

[0066] In this embodiment, refer to Figure 4 As shown, the connecting hole 121 is configured as a strip-shaped hole. Accordingly, the strip-shaped hole can better match the shape of the pole post 132 to ensure a better connection between the connecting hole 121 and the pole post 132; it is understood that in other embodiments, the connecting hole 121 may also be configured with other shapes, such as square, circular, etc.

[0067] In some embodiments, refer to Figure 4 As shown, the first connecting part 131 extends along the length direction of the top cover 12.

[0068] The first connecting part 131 extends along the length of the top cover 12. On the one hand, it can increase the connection area between the first connecting part 131 and the single battery, thereby ensuring the connection between the first connecting part 131 and the other single battery. On the other hand, it can increase the external space of the battery, thereby increasing the battery capacity.

[0069] In some embodiments, refer to Figure 4 As shown, the second connecting part 133 extends along the length direction of the top cover 12.

[0070] The second connecting part 133 extends along the length of the top cover 12. On the one hand, it can increase the connection area between the second connecting part 133 and the electrode tab, thereby ensuring the connection between the second connecting part 133 and the electrode tab. On the other hand, it can increase the internal space of the battery, thereby increasing the battery capacity.

[0071] Since the first connecting part 131 and the second connecting part 133 both extend in the same direction, when the connecting piece passes through the top cover 12 pieces in the form of bending, the first connecting piece and the second connecting piece can be quickly connected to the top cover 12 pieces, achieving the effect of rapid assembly.

[0072] In some embodiments, the ratio of the length of the first connecting portion 131 to the length of the top cover 12 is greater than or equal to 0.1 and less than or equal to 0.2.

[0073] In this embodiment, the lengths of the first connector 13 and the top cover 12 are limited to the above-mentioned range. This ensures that the length of the first connector is sufficient to increase the connection area between the first connector and the individual battery, thus ensuring the connection between the first connector and the individual battery. It also avoids the first connector 131 from being too long, thereby avoiding the waste of external space of the battery, ensuring battery capacity, and reducing the overall weight of the top cover 12 assembly.

[0074] In some embodiments, refer to Figure 8 As shown, the connector 13 includes a main body 134 and a protrusion 135 connected in sequence. The main body 134 and the protrusion 135 are integrally formed. The main body 134 is located on the side of the inner surface of the top cover 12 for connecting the electrode tab. The protrusion 135 passes through the top cover 12. The end of the protrusion 135 away from the main body 134 is flush with the outer surface of the top cover 12. Alternatively, the end of the protrusion 135 away from the main body 134 protrudes from the side of the outer surface of the top cover 12 for connecting another single battery cell.

[0075] In this embodiment, since the connecting piece includes a body and a protrusion 135, it can serve as both a terminal post connecting the electrode tab and a connection to another single battery cell, thereby reducing the number of parts in the top cover 12 assembly and facilitating assembly. Furthermore, the body 134 and the protrusion 135 are integrally formed, and the protrusion 135 protrudes from the surface of the body 134, which increases the contact area between the protrusion 135 and the single battery cell, thereby increasing the battery's overcurrent capacity and achieving high overcurrent.

[0076] In some embodiments, refer to Figures 9 to 12 As shown, at least a portion of the protrusion 135 passes through the first insulating member 15. The first insulating member 15 includes a first insulating portion 151 and a first sealing portion 152. The first insulating portion 151 is disposed between the protrusion 135 and the side of the top cover 12 away from the battery cell, and the first sealing portion 152 is disposed between the protrusion 135 and the inner peripheral surface of the connection hole 121.

[0077] Accordingly, the first insulating part 151 can ensure the insulation between the protrusion 135 and the top cover 12, and the first sealing part 152 can ensure the insulation between the connecting hole 121 and the protrusion 135. The first insulating part 151 and the first sealing part 152 complement each other and together achieve the insulation between the side of the top cover 12 away from the battery cell and the connecting piece to prevent short circuit.

[0078] It is understood that, in this embodiment, reference is made to... Figure 8 As shown, an annular groove 142 can also be provided around the outer periphery of the protrusion 135, and the first sealing part 152 is connected to the annular groove 142. Accordingly, the connection and fixation between the first insulating member 15 and the protrusion 135 can be better achieved.

[0079] In some embodiments, the first insulating portion 151 and the first sealing portion 152 are integrally formed.

[0080] In this way, the integral molding of the first insulating part 151 and the first sealing part 152 reduces complex process steps such as welding, bonding or assembly, thereby reducing manufacturing difficulty and cost. At the same time, it reduces quality problems caused by process defects (such as poor bonding or welding).

[0081] In addition, the one-piece molded first insulating component 15 can be produced directly, reducing subsequent assembly processes, improving production efficiency, and shortening the production cycle.

[0082] In one example, the material of the first insulating element 15 may be configured as, but is not limited to, plastic.

[0083] In one example, the first insulating part 151 and the first sealing part 152 may be made of the same or different materials.

[0084] In some embodiments, the first insulating member 15 is an adhesive member used to bond and fix the top cover 12 to the connecting piece.

[0085] Accordingly, the first insulating component 15 not only serves as an insulator, but also achieves the effect of bonding and fixing the top cover 12 and the connecting piece, thereby ensuring the insulating connection and fixing effect between the top cover 12 and the connecting piece.

[0086] It should also be further noted that, in this embodiment, reference is made to... Figure 9 As shown, there are two connecting pieces, and the two connecting pieces are spaced apart along the length of the top cover 12 to connect the positive and negative tabs of the battery cell.

[0087] In some embodiments, refer to Figure 8 As shown, at least a portion of the main body 134 is provided around the protrusion 135.

[0088] The main body 134 is arranged around the protrusion 135, so that the entire outer peripheral surface of the protrusion 135 can serve as a flow surface, thereby increasing the battery's flow capacity and achieving high flow.

[0089] In some embodiments, the protrusion 135 protrudes from one side of the thickness direction of the main body 134, and the height of the protrusion 135 protruding from the main body 134 is greater than or equal to 3 mm and less than or equal to 5 mm.

[0090] By limiting the parameters mentioned above, the height of the protrusion 135 is sufficient to ensure the connection between the protrusion 135 and another single battery cell, while also preventing the protrusion 135 from being too high, so as not to affect the external space of the battery.

[0091] It should also be noted that, in this embodiment, the protrusion 135 protrudes 4.5mm from the main body 134. Of course, in other embodiments, the protrusion 135 protrudes 3mm, 3.5mm, 4mm, 4.5mm, or 5mm from the main body 134.

[0092] In some embodiments, refer to Figure 8 As shown, the protrusion 135 includes a bulge formed on the main body 134. Of course, in its embodiments, the protrusion 135 may also be configured in other forms, such as circular.

[0093] In some embodiments, refer to Figure 8 As shown, the protrusion 135 includes: a sidewall 1351, which is connected to the main body 134 and surrounds the inner peripheral surface of the connecting hole 121, and is fixedly connected to the inner peripheral surface of the connecting hole 121; and a top wall 1352, which is connected to the side of the sidewall 1351 away from the main body 134.

[0094] Accordingly, in this embodiment, the entire outer peripheral surface of the sidewall 1351 can be used as a flow surface, thereby increasing the current carrying capacity of the battery and achieving high current carrying capacity; while the top wall 1352 can facilitate the connection between the protrusion 135 and another single battery cell.

[0095] In some embodiments, refer to Figure 8 As shown, the sidewall 1351 and the main body 134 have a smooth transition.

[0096] This ensures that the connection between the sidewall 1351 and the main body 134 is not an edge, thereby increasing the connection area between the sidewall 1351 and the main body 134 and guaranteeing the flow capacity of the connecting piece.

[0097] In some embodiments, refer to Figure 8 As shown, there is a smooth transition between the top wall 1352 and the side wall 1351.

[0098] This ensures that the connection between the top wall 1352 and the side wall 1351 is not an edge, thereby increasing the connection area between the top wall 1352 and the side wall 1351 and guaranteeing the flow capacity of the connecting piece.

[0099] In this embodiment, refer to Figure 9 As shown, the top cover 12 is provided with a connecting hole 121 through which the protrusion 135 passes, and the connecting hole 121 is configured as a rectangular hole. It can be understood that, in this embodiment, since there are two connecting pieces, there are also two connecting holes 121. The two connecting holes 121 are spaced apart along the length of the top cover 12 to be used for connecting to the two connecting pieces one by one.

[0100] Accordingly, the rectangular hole can better match the shape of the protrusion 135 to ensure a better connection between the connecting hole 121 and the protrusion 135. It is understood that in other embodiments, the connecting hole 121 can also be set in other shapes, such as square, circle, etc., and correspondingly, the protrusion 135 can also be set in square or circle.

[0101] In some embodiments, the battery further includes a second insulating member 16, with at least a portion of the connector 13 passing through the second insulating member 16. The second insulating member 16 is sandwiched between the connector 13 and the top cover 12 to provide insulation between the side of the top cover 12 near the cell and the connector 13.

[0102] Therefore, the occurrence of short circuits between the connecting piece and the top cover 12 can be reduced, ensuring the safety of battery use.

[0103] When the connecting piece includes a pole portion 132, a first connecting portion 131, and a second connecting portion 133, refer to Figure 6 and Figure 7 As shown, at least a portion of the pole post 132 passes through the second insulating member 16. The second insulating member 16 includes a second insulating portion 161 and a second sealing portion 162. The second insulating portion 161 is disposed between the second connecting portion 133 and the top cover 12, and the second sealing portion 162 is disposed between the inner circumferential surface of the connecting hole 121 and the pole post 132.

[0104] Accordingly, the second insulating part 161 can ensure the insulation between the second connecting part 133 and the top cover 12, and the second sealing part 162 can ensure the insulation between the connecting hole 121 and the pole part 132. The second insulating part 161 and the second sealing part 162 complement each other to jointly achieve the insulation between the side of the top cover 12 near the battery cell and the connecting piece, preventing short circuit.

[0105] When the connecting piece includes a main body portion 134 and a protrusion portion 135, refer to Figure 11 and Figure 12As shown, at least a portion of the protrusion 135 passes through the second insulating member 16. The second insulating member 16 includes a second insulating portion 161 and a second sealing portion 162. The second insulating portion 161 is disposed between the main body portion 134 and the side of the top cover 12 away from the battery cell, and the second sealing portion 162 is disposed between the main body portion 134 and the inner peripheral surface of the connection hole 121.

[0106] Accordingly, the second insulating part 161 can ensure the insulation between the main body part 134 and the top cover 12, and the second sealing part 162 can ensure the insulation between the connecting hole 121 and the main body part 134. The second insulating part 161 and the second sealing part 162 complement each other and together achieve the insulation between the side of the top cover 12 near the battery cell and the connecting piece to prevent short circuit.

[0107] In some embodiments, the second insulating portion 161 and the second sealing portion 162 are integrally formed.

[0108] Thus, the integral molding of the second insulating part 161 and the second sealing part 162 reduces complex process steps such as welding, bonding, or assembly, thereby lowering manufacturing difficulty and cost. At the same time, it reduces quality problems caused by process defects (such as weak bonding or poor welding).

[0109] In addition, the one-piece molded second insulating component 16 can be produced directly, reducing subsequent assembly processes, improving production efficiency, and shortening the production cycle.

[0110] In one example, the material of the second insulating element 16 may be configured as, but is not limited to, plastic.

[0111] In one example, the second insulating part 161 and the second sealing part 162 may be made of the same or different materials.

[0112] In some embodiments, the second insulating member 16 is an adhesive member used to bond and fix the top cover 12 to the connecting piece.

[0113] Accordingly, the second insulating component 16 not only serves as an insulating element, but also achieves the effect of bonding and fixing the top cover 12 and the connecting piece, thereby ensuring the insulating connection and fixing effect between the top cover 12 and the connecting piece.

[0114] In some embodiments, the battery module 1 further includes a sealing ring 17, which is disposed between the first insulating member 15 and the second insulating member 16, and is also disposed between the top cover 12 and the connector 13 for sealing and fixing the top cover 12 and the connector 13.

[0115] In this way, impurities are reduced from entering the inner surface of the top cover 12 through the connection hole 121 from the outer surface of the top cover 12.

[0116] In one embodiment, a first sealing ring 17 is disposed between a first insulating member 15 and a second insulating member 16 in the height direction of the top cover 12. This helps to improve the sealing performance of the connection hole 121.

[0117] In some embodiments, refer to Figure 2 As shown, the busbar 14 is provided with a recess 143, which is recessed along the thickness direction of the busbar 14.

[0118] The bent busbar 14 can better withstand mechanical stress and vibration. The bent portion of the busbar 14 can release stress by gradually becoming straighter. Through the reasonable bending design, the busbar 14 is more stable inside the battery module 1, reducing the risk of deformation or damage caused by external forces.

[0119] Secondly, this utility model provides a battery pack, which includes the aforementioned battery module 1.

[0120] This battery pack has all the beneficial effects of the aforementioned battery module 1:

[0121] Since at least part of the connector 13 extends to the side of the top cover 12 away from the battery cell, when two adjacent battery cells are connected, the busbar 14 can be directly connected to the connector 13, thereby clamping the top cover 12 between the busbar 14 and the connector 13, so that the connector 13 is fixed on the top cover 12. Compared with the traditional technology, the setting of the rivet block is eliminated, and the busbar 14 and the connector 13 can be directly connected without the need for the rivet block. This can reduce the number of parts in the battery module 1, thereby reducing the assembly difficulty and improving the assembly efficiency.

[0122] Thirdly, this utility model provides an electrical device that includes the aforementioned battery pack.

[0123] This electrical device has all the beneficial effects of the aforementioned battery pack:

[0124] Since at least part of the connector 13 extends to the side of the top cover 12 away from the battery cell, when two adjacent battery cells are connected, the busbar 14 can be directly connected to the connector 13, thereby clamping the top cover 12 between the busbar 14 and the connector 13, so that the connector 13 is fixed on the top cover 12. Compared with the traditional technology, the setting of the rivet block is eliminated, and the busbar 14 and the connector 13 can be directly connected without the need for the rivet block. This can reduce the number of parts in the battery module 1, thereby reducing the assembly difficulty and improving the assembly efficiency.

[0125] Electrical equipment can include, but is not limited to, vehicles, smart wearable devices, mobile terminals, home appliances, and medical devices; this application does not limit the scope of these categories. Vehicles include, but are not limited to, cars, buses, trains, ships, and aircraft. Smart wearable devices include, but are not limited to, smartwatches, smart bracelets, and neck massagers. Mobile terminals include, but are not limited to, smartphones, laptops, tablets, and POS (point-of-sales) machines. Home appliances include, but are not limited to, televisions, washing machines, air conditioners, rice cookers, smart robot vacuums, and smart lights. Medical devices include, but are not limited to, infrared electronic thermometers, pulse oximeters, and body composition analyzers.

[0126] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery module, characterized by, include: A plurality of batteries, each battery comprising a housing (11), a cell, a top cover (12), and a connector (13), wherein the housing (11) has a mounting cavity and an opening, the cell is disposed in the mounting cavity, the top cover (12) is connected to the housing (11) to close the opening, the connector (13) passes through the top cover (12) to be electrically connected to the cell, and at least a portion of the connector (13) extends to the side of the top cover (12) opposite to the cell; and, Busbar (14) connected to the connectors (13) of at least two of the batteries such that the top cover (12) is sandwiched between the busbar (14) and the connectors (13).

2. The battery module of claim 1, wherein, The busbar (14) includes a welded part (141), which is welded and fixed to the connector (13).

3. The battery module of claim 2, wherein, The busbar (14) is provided with a groove (142), the opening of the groove (142) facing away from the connector (13), and the bottom wall of the groove (142) forms at least part of the welded part (141).

4. The battery module of claim 3, wherein, The bottom wall surface of the groove (142) is configured as a rough surface.

5. The battery module of any one of claims 1-4, wherein, The battery also includes a first insulating member (15), at least a portion of the connector (13) passes through the first insulating member (15), the first insulating member (15) is sandwiched between the busbar (14) and the top cover (12) for insulation between the side of the top cover (12) away from the cell and the connector (13).

6. The battery module of claim 5, wherein, The connector (13) includes a first connecting part (131), a terminal part (132), and a second connecting part (133). The top cover (12) is provided with a connecting hole (121). The terminal part (132) passes through the connecting hole (121) and is connected between the first connecting part (131) and the second connecting part (133), such that the first connecting part (131) and the second connecting part (133) are respectively located on both sides of the connecting hole (121). The first connecting part (131) is used to connect another single battery cell, and the second connecting part (133) extends along the surface of the top cover (12) and is used to connect a tab.

7. The battery module of claim 5, wherein, The connector (13) includes a main body (134) and a protrusion (135) connected in sequence. The main body (134) and the protrusion (135) are integrally formed. The main body (134) is located on the side of the inner surface of the top cover (12) for connecting the tab. The protrusion (135) passes through the top cover (12). One end of the protrusion (135) away from the main body (134) is flush with the outer surface of the top cover (12). Alternatively, one end of the protrusion (135) away from the main body (134) protrudes from the side of the outer surface of the top cover (12) for connecting another single battery cell.

8. The battery module according to claim 6 or 7, characterized in that The battery also includes a second insulating member (16), at least a portion of the connector (13) passes through the second insulating member (16), the second insulating member (16) is sandwiched between the connector (13) and the top cover (12) for insulation between the side of the top cover (12) near the cell and the connector (13).

9. The battery module of claim 8, wherein, The battery module (1) further includes a sealing ring (17), which is disposed between the first insulating member (15) and the second insulating member (16), and is disposed between the top cover (12) and the connector (13) for sealing and fixing the top cover (12) and the connector (13).

10. The battery module of any one of claims 1-4, wherein, The busbar (14) is provided with a recess (143), which is recessed along the thickness direction of the busbar (14).

11. A battery pack, characterized by Includes the battery module (1) as described in any one of claims 1-10.

12. An electrical device, characterized by Includes the battery pack as described in claim 11.

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