Battery monomer and battery pack

Abstract

The invention relates to the technical field of new energy batteries, and discloses a single battery and a battery pack, the single battery has a first direction and a second direction which are perpendicular to each other, the single battery comprises a cover plate, the cover plate comprises a top cover sheet and an insulating part, the top cover sheet is provided with a first assembly hole and a pole hole, and the insulating part is provided with an assembly cavity; the pole component is fixedly connected with the top cover plate; the wireless controller is arranged in the assembling cavity, and the wireless controller is electrically connected with the pole assembly; the sealing assembly comprises a connecting piece and an insulation sealing part, the connecting piece is fixedly connected with the top cover piece and blocks the first assembly hole, the connecting piece is provided with a second assembly hole, and the insulation sealing part blocks the second assembly hole. The wireless controller is arranged in the assembling cavity of the insulating part, and monitored information is transmitted to the outside through wireless communication, so that the sealing performance of the battery monomers is improved; the connecting piece and the insulating sealing part can be prefabricated into a whole and then connected with the top cover plate, so that the influence on the connection between the top cover plate and the pole assembly is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy batteries, and in particular to a battery cell and a battery pack. Background Art

[0002] During the use of lithium-ion batteries, their internal voltage, resistance, temperature, etc. will change with the use time and the use environment. When the values ​​of the lithium-ion battery change and exceed the normal range, it will cause the lithium-ion battery to have the risk of thermal runaway. Therefore, it is necessary to effectively monitor the battery status to ensure the safe use of lithium-ion batteries.

[0003] When monitoring the status of existing lithium-ion batteries, the controller is typically placed outside the cover, with some data acquisition cables and sensor probes placed inside the housing. The controller and sensors are connected by wires. This reduces the internal space occupied by the lithium-ion battery. However, there is a risk of sealing the cover where the wires pass through. Summary of the Invention

[0004] The purpose of the present invention is to provide a battery cell to solve the problem of sealing risk of the cover plate of the lithium ion battery in the prior art; the present invention also provides a battery pack using the battery cell.

[0005] In order to achieve the above object, the present invention provides a battery cell, wherein the battery cell has a first direction and a second direction perpendicular to each other, and the battery cell comprises:

[0006] The cover plate includes a top cover sheet and an insulating member fixedly connected to the top cover sheet, wherein the top cover sheet is provided with a first assembly hole and a pole hole penetrating the top cover sheet along the first direction, the first assembly hole and the pole hole being spaced apart along the second direction, and the insulating member is provided with an assembly cavity;

[0007] A pole assembly is provided in the pole hole, and the pole assembly is fixedly connected to the top cover sheet;

[0008] A wireless controller is provided in the assembly cavity, and the wireless controller is electrically connected to the pole assembly;

[0009] The sealing assembly includes a connector and an insulating sealing portion. The connector is fixedly connected to the top cover and blocks the first assembly hole. The connector is provided with a second assembly hole passing through the connector along the first direction. The insulating sealing portion blocks the second assembly hole.

[0010] In some embodiments, the surface roughness of the connecting member is Ra1, and the surface roughness of the top cover sheet is Ra2, satisfying: Ra1>Ra2.

[0011] In some embodiments, the second assembly hole includes a first hole segment, a second hole segment and a third hole segment, the second hole segment is connected between the first hole segment and the third hole segment along the first direction, the insulating sealing portion is filled in the first hole segment, the second hole segment and the third hole segment, the minimum hole diameter of the first hole segment is R1 mm, the maximum hole diameter of the second hole segment is R2 mm, and the minimum hole diameter of the third hole segment is R3 mm, satisfying: R1>R2, R3>R2.

[0012] In some embodiments, the insulating member includes a first lower plastic and a second lower plastic that are clamped together, the first lower plastic is fixedly connected to the top cover sheet, and the second lower plastic is spaced apart on the side of the first lower plastic away from the top cover sheet along the first direction, and the first lower plastic and the second lower plastic enclose to form the assembly cavity.

[0013] In some embodiments, the first lower plastic includes a main body and ribs and buckles fixedly connected to the main body respectively; the second lower plastic is provided with matching holes penetrating the second lower plastic along the first direction at both ends along the third direction; the buckles are passed through the matching holes along the first direction and are engaged with the second lower plastic; the second lower plastic is provided with the ribs at both ends along the second direction; the main body, the buckles, the ribs and the second lower plastic are enclosed to form the assembly cavity; the first direction, the second direction and the third direction are perpendicular to each other.

[0014] In some embodiments, the second lower plastic includes a main body and a fixed part connected to each other, the matching hole is provided in the main body, the fixing parts are respectively provided at both ends of the main body along the third direction, the fixing parts are fixedly connected to the main body, and the fixing parts and the buckle are spaced apart along the third direction.

[0015] In some embodiments, the battery cell also includes an explosion-proof valve, the top cover sheet is also provided with an explosion-proof hole passing through the top cover sheet along the first direction, the explosion-proof valve is fixedly connected to the top cover sheet and blocks the explosion-proof hole, and the explosion-proof hole and the first assembly hole are spaced apart along the second direction; the main body is provided with a first pressure relief hole passing through the main body along the first direction, the main body is provided with a second pressure relief hole passing through the main body along the first direction, the explosion-proof valve is arranged opposite to the first pressure relief hole, and the second pressure relief hole is arranged opposite to the wireless controller along the first direction.

[0016] In some embodiments, the main body is further provided with a third pressure relief hole penetrating the main body along the first direction. Along the first direction, the orthographic projection of the rib on the main body is located between the first pressure relief hole and the third pressure relief hole.

[0017] In some embodiments, the main body is further provided with a weight-reducing hole, and the weight-reducing hole and the second pressure relief hole are spaced apart along the third direction.

[0018] The present invention also provides a battery pack comprising the battery cell described in any of the above technical solutions.

[0019] Compared with the prior art, a battery cell and a battery pack according to an embodiment of the present invention have the following advantages: a wireless controller is provided in the assembly cavity of the insulating member and connected to the pole assembly, thereby supplying power to the wireless controller; the wireless controller is arranged in the assembly cavity of the insulating member, which is located inside the battery cell, and transmits the monitored information to the outside through wireless communication, without the need to set a wire passing through the cover plate, thereby improving the sealing of the battery cell; in addition, the connector of the sealing assembly seals the first assembly hole on the top cover sheet, and the insulating sealing part seals the second assembly hole on the connector, while the insulating sealing part seals the second assembly hole on the connector, and the insulating sealing part can prevent the wireless controller located in the assembly cavity from being electromagnetically shielded, thereby ensuring the wireless transmission signal output of the wireless controller; the connector of the sealing assembly is fixedly connected to the top cover sheet, and the connector and the insulating sealing part can be prefabricated as a whole and then connected to the top cover sheet, thereby avoiding the processing of the connector affecting the connection between the top cover sheet and the pole assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a battery cell of the present invention;

[0021] Figure 2 yes Figure 1 A top view of a cover plate of a battery cell;

[0022] Figure 3 yes Figure 2 a bottom view of the cover plate;

[0023] Figure 4 yes Figure 2 Schematic diagram of the explosion structure of the cover;

[0024] Figure 5 yes Figure 4 A schematic structural diagram of the first lower plastic portion of the cover;

[0025] Figure 6 yes Figure 5 A partial enlarged schematic diagram of the first lower plastic portion A;

[0026] Figure 7 yes Figure 4 A schematic structural diagram of the second lower plastic portion of the cover;

[0027] Figure 8 yes Figure 7 A schematic structural diagram of another embodiment of the second lower plastic;

[0028] Figure 9 is with Figure 8 A partially enlarged schematic diagram of the second lower plastic fitting into the first lower plastic;

[0029] Figure 10 yes Figure 4 A cross-sectional view of the sealing assembly.

[0030] In the figure, 1, shell, 2, cover plate, 21, top cover plate, 211, first assembly hole, 212, pole hole, 213, explosion-proof hole, 22, insulating member, 221, assembly cavity, 23, first lower plastic, 231, main body, 232, rib plate, 233, buckle, 234, first pressure relief hole, 235, third pressure relief hole, 236, fixing plate, 24, second lower plastic, 241, matching hole, 242, main body, 243. Fixing part, 244. Second pressure relief hole, 245. Weight reduction hole, 3. Electrode assembly, 4. Insulating film, 5. Pole assembly, 6. Wireless controller, 7. Sealing assembly, 71. Connector, 72. Insulating sealing part, 73. Second assembly hole, 731. First hole section, 732. Second hole section, 733. Third hole section, 8. Explosion-proof valve, 9. Pin, Z, first direction, Y, second direction, X, third direction. DETAILED DESCRIPTION

[0031] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0032] A preferred embodiment of a battery cell of the present invention is as follows Figures 1 to 10 As shown, the battery cell includes a housing 1, a cover plate 2, an electrode assembly 3, an insulating film 4, a pole assembly 5, a wireless controller 6, and a sealing assembly 7. The housing 1 and the cover plate 2 enclose a receiving cavity, and the electrode assembly 3, the insulating film 4, and the wireless controller 6 are all disposed within the receiving cavity. The housing 1 protects the internal components, the insulating film 4 covers the electrode assembly 3 to insulate and isolate the housing 1 and the electrode assembly 3, and the pole assembly 5 is electrically connected to the electrode assembly 3.

[0033] The battery cell has a first direction Z, a second direction Y and a third direction X, and the first direction Z, the second direction Y and the third direction X are perpendicular to each other. In this embodiment, the first direction Z is the height direction of the battery cell, the second direction Y is the width direction of the battery cell, and the third direction X is the thickness direction of the battery cell. The shell 1 is a rectangular parallelepiped with an open top, the cover plate 2 is a rectangle, and the accommodating cavity formed by the shell 1 and the cover plate 2 is a rectangular space.

[0034] like Figure 4As shown, the cover plate 2 includes a top cover sheet 21 and an insulating member 22. The top cover sheet 21 is fixedly connected to the housing 1 to seal the opening at the top of the housing 1. The insulating member 22 is fixedly connected to the top cover sheet 21 and is located on the side of the top cover sheet 21 facing the housing 1 along the first direction Z. In this embodiment, the top cover sheet 21 and the housing 1 are both made of aluminum and are welded together. The insulating member 22 is hot-melt-connected to the top cover sheet 21.

[0035] The top cover sheet 21 is provided with a first assembly hole 211 and a pole hole 212 that penetrate the top cover sheet 21 along a first direction Z. The first assembly hole 211 and the pole hole 212 are spaced apart along a second direction Y. The first assembly hole 211 is used to mount a sealing assembly 7, which seals the top cover sheet 21 while ensuring signal transmission from the wireless controller 6. The pole assembly 5 is disposed in the pole hole 212 and is fixedly connected to the top cover sheet 21. The specific structure of the pole assembly 5 is conventional and will not be described in detail here.

[0036] The insulating member 22 is provided with an assembly cavity 221, and the wireless controller 6 is installed in the assembly cavity 221. Since the insulating member 22 is located on the side of the top cover piece 21 close to the shell 1, after the top cover piece 21 is fixedly connected to the shell 1, the insulating member 22 is located in the accommodating cavity formed by the top cover piece 21 and the shell 1, so that the wireless controller 6 is located inside the battery cell and will not be exposed to the outside of the cover plate 2.

[0037] The wireless controller 6 is electrically connected to the pole assembly 5. The wireless controller 6 can obtain power from the battery cell through the pole assembly 5. The wireless controller 6 also has a built-in wireless module that can transmit collected information to the outside via wireless transmission signals, eliminating the need for additional wires running through the cover 2 to achieve power supply and signal transmission, thereby improving the sealing of the cover 2. In this embodiment, there are two pole assemblies 5, which are respectively the positive and negative poles of the battery cell. Two pins 9 are connected to the wireless controller 6, which are electrically connected to the positive and negative poles, respectively, to power the wireless controller 6.

[0038] The sealing assembly 7 includes a connector 71 and an insulating sealing portion 72. The connector 71 is fixedly connected to the top cover sheet 21 and blocks the first assembly hole 211. The connector 71 is provided with a second assembly hole 73 passing through the connector 71 along the first direction Z. The insulating sealing portion 72 blocks the second assembly hole 73. The second assembly hole 73 on the connector 71 provides an assembly position for the insulating sealing portion 72, and the insulating sealing portion 72 can seal the second assembly hole 73.

[0039] In this embodiment, the first assembly hole 211 is a rectangular hole, and the connector 71 is a rectangular aluminum material adapted to the first assembly hole 211. The connector 71 is made of the same material as the top cover sheet 21 and is welded to ensure that the connector 71 seals the first assembly hole 211. The insulating sealing portion 72 is an injection molded part and is filled into the second assembly hole 73 through an injection molding process.

[0040] Because both the housing 1 and the cover 2 are made of aluminum, electromagnetic shielding is easily formed, resulting in a weak transmission signal from the wireless controller 6. Therefore, a first assembly hole 211 is provided in the top cover to accommodate the sealing assembly 7. The insulating sealing portion 72 of the sealing assembly 7 can simultaneously seal the second assembly hole 73 of the connector 71 while ensuring wireless transmission signal output from the controller. In some embodiments, the sealing assembly 7 and the controller can be positioned relative to each other along a first direction Z to further enhance wireless signal transmission.

[0041] The battery cell is provided with a wireless controller 6 in the assembly cavity 221 of the insulating member 22, which is connected to the pole assembly 5, so as to supply power to the wireless controller 6. The wireless controller 6 is arranged in the assembly cavity 221 of the insulating member 22, which is located inside the battery cell and transmits the monitored information to the outside through wireless communication. There is no need to set a wire through the cover plate 2, thereby improving the sealing of the battery cell; in addition, the connector 71 of the sealing assembly 7 seals the first assembly hole 211 on the top cover sheet 21, and the insulating sealing portion 72 seals the second assembly hole 73 on the connector 71. The insulating sealing portion can prevent the wireless controller 6 located in the assembly cavity 221 from being electromagnetically shielded, thereby ensuring the wireless transmission signal output of the wireless controller 6; the connector 71 of the sealing assembly 7 is fixedly connected to the top cover sheet 21, and the connector 71 and the insulating sealing portion 72 can be prefabricated as a whole and then connected to the top cover sheet 21, so as to avoid the processing of the connector 71 affecting the connection between the top cover sheet 21 and the pole assembly 5.

[0042] In some embodiments, the surface roughness of the connecting member 71 is Ra1, and the surface roughness of the top cover sheet 21 is Ra2, satisfying: Ra1>Ra2.

[0043] The surface roughness of the connector 71 is greater than that of the top cover sheet 21, which can increase the bonding strength between the insulating seal 72 and the connector 71. The pole assembly 5 is to be installed on the top cover sheet 21, and a sealing ring needs to be compressed between the pole assembly 5 and the top cover sheet 21. The top cover sheet 21 needs to maintain a smooth surface. Therefore, a first assembly hole 211 is opened on the top cover sheet 21 to install the top cover sheet 21 of the sealing assembly 7. The top cover sheet 21 can be processed to make it rougher before being welded to the top cover sheet 21. There is no need to process the top cover sheet 21 to increase its roughness, while meeting the assembly requirements of the insulating seal and the pole assembly 5.

[0044] In this embodiment, the connector 71 is corroded with a chemical solution so that rough holes are corroded on the surface of the connector 71, and then the insulating sealing portion 72 is injection molded in the second assembly hole 73 of the connector 71. The insulating sealing portion 72 and the connector 71 are pre-assembled into a whole and then fixedly connected to the top cover piece 21.

[0045] In some embodiments, the second assembly hole 73 includes a first hole segment 731, a second hole segment 732 and a third hole segment 733, the second hole segment 732 is connected between the first hole segment 731 and the third hole segment 733 along the first direction Z, the insulating sealing portion 72 is filled in the first hole segment 731, the second hole segment 732 and the third hole segment 733, the minimum aperture of the first hole segment 731 is R1 mm, the maximum aperture of the second hole segment 732 is R2 mm, and the minimum aperture of the third hole segment 733 is R3 mm, satisfying: R1>R2, R3>R2.

[0046] like Figure 10 As shown, in this embodiment, the first hole segment 731, the second hole segment 732, and the third hole segment 733 are all cylindrical holes. Therefore, the minimum diameter R1 of the first hole segment 731, the maximum diameter R2 of the second hole segment 732, and the minimum diameter R3 of the third hole segment 733 are all the diameters of the respective hole segments. The maximum diameter R2 of the second hole segment 732, located in the middle of the second assembly hole 73 along the first direction Z, is smaller than both the minimum diameter R1 of the first hole segment 731 and the minimum diameter R3 of the third hole segment 733. Therefore, when the insulating sealing portion 72 is injection molded into the second assembly hole 73, it forms an "I"-shaped structure with a smaller center portion and larger ends along the first direction Z. The enlarged ends of the insulating sealing portion 72 enhance the sealing performance of the second hole segment 732. When the top cover sheet 21 deforms during use of the battery cell, the insulating sealing portion 72 will not deform or leak. In other embodiments, the first hole segment 731 , the second hole segment 732 and the third hole segment 733 may also be arc-shaped holes extending along the first direction Z or tapered holes.

[0047] In some embodiments, the insulating member 22 includes a first lower plastic 23 and a second lower plastic 24 that are clamped together. The first lower plastic 23 is fixedly connected to the top cover sheet 21. The second lower plastic 24 is spaced apart on the side of the first lower plastic 23 away from the top cover sheet 21 along the first direction Z. The first lower plastic 23 and the second lower plastic 24 enclose an assembly cavity 221.

[0048] like Figures 4 to 7 As shown, the first lower plastic 23 and the second lower plastic 24 are snap-fitted. The first lower plastic 23 and the second lower plastic 24 can provide insulation protection for the wireless controller 6 to avoid short circuit between the controller and the electrode assembly 3. In addition, the snap-fitting is a detachable connection structure, which is convenient for assembling the second lower plastic 24 after inserting the wireless controller 6 into the assembly cavity 221 during assembly.

[0049] In some embodiments, the first lower plastic 23 includes a main body 231 and ribs 232 and a buckle 233 respectively fixedly connected to the main body 231. The second lower plastic 24 is provided with matching holes 241 at both ends along the third direction X, which penetrate the second lower plastic 24 along the first direction Z. The buckle 233 is passed through the matching holes 241 along the first direction Z and is engaged with the second lower plastic 24. The second lower plastic 24 is provided with ribs 232 at both ends along the second direction Y. The main body 231, the buckle 233, the ribs 232 and the second lower plastic 24 enclose an assembly cavity 221.

[0050] like Figure 5 、 Figure 6 and Figure 7 As shown, the two ribs 232 of the first lower plastic 23 can clamp and fix the wireless controller 6 along the second direction Y, positioning the wireless controller 6 and preventing the wireless controller 6 from moving within the assembly cavity 221. The two buckles 233 can penetrate the matching holes 241 of the second lower plastic 24 along the first direction Z and then engage with the second lower plastic 24, simplifying the engagement between the second lower plastic 24 and the first lower plastic 23.

[0051] In some embodiments, the second lower plastic 24 includes a main body portion 242 and a fixing portion 243 connected to each other, a mating hole 241 is provided on the main body portion 242, and a fixing portion 243 is provided at both ends of the main body portion 242 along the third direction X. The fixing portion 243 is fixedly connected to the main body portion 231, and the fixing portion 243 and the buckle 233 are spaced apart along the third direction X.

[0052] like Figure 8 and Figure 9 As shown, the mating holes 241 of the second lower plastic 24 are provided on the main body 242, which is used to insulate and protect the wireless controller 6. Fixing portions 243 are provided at both ends of the main body 242 along the third direction X. The two fixing portions 243 extend along the first direction Z. The fixing portions 243 can be thermally melted to the insulating film 4, thereby securing the insulating film 4 corresponding to the locations where the clips 233 are provided on the first lower plastic 23, thereby improving the insulation performance of the battery cell.

[0053] In other embodiments, Figure 5 、 Figure 6 and Figure 7As shown, the fixing portion 243 can be omitted from the second lower plastic portion 24. Instead, a fixing plate 236 is provided on the main body 231 of the first lower plastic portion 23. The fixing plate 236 and the buckle 233 are spaced apart along the third direction X, and the fixing plate 236 is heat-fused to the insulating film 4. Both the first and second lower plastic portions 23 and 24 are injection-molded. Compared to providing the fixing plate 236 on the first lower plastic portion 23, providing the fixing portion 243 on the main body 231 of the second lower plastic portion 24 helps ensure mold strength. This is because the gap between the fixing plate 236 and the buckle 233 results in a slender mold shape, which weakens the structure.

[0054] In some embodiments, the battery cell also includes an explosion-proof valve 8, and the top cover sheet 21 is further provided with an explosion-proof hole 213 that penetrates the top cover sheet 21 along the first direction Z. The explosion-proof valve 8 is fixedly connected to the top cover sheet 21 and blocks the explosion-proof hole 213. The explosion-proof hole 213 and the first assembly hole 211 are spaced apart along the second direction Y; the main body 231 is provided with a first pressure relief hole 234 that penetrates the main body 231 along the first direction Z, and the main body 242 is provided with a second pressure relief hole 244 that penetrates the main body 242 along the first direction Z. The explosion-proof valve 8 is arranged opposite to the first pressure relief hole 234, and the second pressure relief hole 244 is arranged opposite to the wireless controller 6 along the first direction Z.

[0055] like Figure 5 and Figure 7 As shown, explosion-proof holes 213 are provided on the top cover sheet 21 to accommodate explosion-proof valves 8. This allows for rapid discharge of high-pressure gas within the battery cell to reduce pressure in the event of thermal runaway. Spacing the explosion-proof holes 213 and the first assembly holes 211 along the second direction Y allows for efficient utilization of the space between the battery cells in the second direction Y and avoids the reduction in strength of the top cover sheet 21 due to excessive local openings.

[0056] A first pressure relief hole 234 is provided in the main body 231 of the first lower plastic member 23, and a second pressure relief hole 244 is provided in the main body 242 of the second lower plastic member 24. This interconnects the first pressure relief hole 234, the second pressure relief hole 244, the assembly cavity 221, the explosion-proof valve 8, and the accommodating cavity within the housing 1, forming an exhaust passage. After a battery cell experiences thermal runaway, high-pressure gas can be rapidly discharged through the second pressure relief hole 244, the assembly cavity 221, the first pressure relief hole 234, and the explosion-proof valve 8. In this embodiment, multiple first and second pressure relief holes 234, 244 are provided and arranged in an array to improve gas discharge efficiency.

[0057] In this embodiment, the second lower plastic 24, the buckle 233, and the rib 232 are respectively arranged opposite to the explosion-proof valve 8 along the first direction Z. The conventional boss structure is eliminated at the position on the first lower plastic 23 opposite to the explosion-proof valve 8 along the first direction Z. The second lower plastic 24 can contact and abut the electrode assembly 3, thereby rationally utilizing the internal space of the battery cell.

[0058] In some embodiments, the main body 231 further defines a third pressure relief hole 235 extending through the main body 231 along the first direction Z. Along the first direction Z, the orthographic projection of the rib 232 on the main body 231 is located between the first pressure relief hole 234 and the third pressure relief hole 235 .

[0059] like Figure 5 As shown, the orthographic projection of the rib 232 on the main body 231 is located between the first pressure relief hole 234 and the third pressure relief hole 235. Therefore, the third pressure relief hole 235 is located outside the assembly cavity 221, increasing the exhaust volume of the exhaust channel and allowing for rapid exhaust in the event of thermal runaway of the battery cell. In this embodiment, there are multiple third pressure relief holes 235, spaced apart along the third direction X.

[0060] In some embodiments, the main body 242 is further provided with a weight-reducing hole 245 , and the weight-reducing hole 245 and the second pressure relief hole 244 are spaced apart along the third direction X.

[0061] like Figure 7 and Figure 8 As shown, a weight-reducing hole 245 is provided on the main body 242 of the second lower plastic 24. The weight-reducing hole 245 can reduce the weight of the second lower plastic 24 and also accelerate the gas discharge. In this embodiment, the weight-reducing hole 245 is a rectangular hole.

[0062] The present invention further provides a preferred embodiment of a battery pack, comprising a battery cell. The specific structure of the battery cell is the same as the specific structure of the battery cell described in any of the above embodiments, and will not be repeated here.

[0063] In summary, an embodiment of the present invention provides a battery cell and a battery pack, wherein a wireless controller is provided in the assembly cavity of the insulating member and connected to the pole assembly, thereby supplying power to the wireless controller. The wireless controller is arranged in the assembly cavity of the insulating member, which is located inside the battery cell, and transmits the monitored information to the outside through wireless communication. There is no need to set a wire passing through the cover plate, thereby improving the sealing of the battery cell; in addition, the connector of the sealing assembly seals the first assembly hole on the top cover sheet, and the insulating sealing part seals the second assembly hole on the connector. The insulating sealing part can prevent the wireless controller located in the assembly cavity from being electromagnetically shielded, thereby ensuring the wireless transmission signal output of the wireless controller; the connector of the sealing assembly is fixedly connected to the top cover sheet, and the connector and the insulating sealing part can be prefabricated as a whole and then connected to the top cover sheet, thereby avoiding that the processing of the connector affects the connection between the top cover sheet and the pole assembly.

[0064] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A battery cell, characterized in that: The battery cell has a first direction and a second direction perpendicular to each other, and the battery cell includes: The cover plate includes a top cover sheet and an insulating member fixedly connected to the top cover sheet, wherein the top cover sheet is provided with a first assembly hole and a pole hole penetrating the top cover sheet along the first direction, the first assembly hole and the pole hole being spaced apart along the second direction, and the insulating member is provided with an assembly cavity; A pole assembly is provided in the pole hole, and the pole assembly is fixedly connected to the top cover sheet; A wireless controller is provided in the assembly cavity, and the wireless controller is electrically connected to the pole assembly; The sealing assembly includes a connector and an insulating sealing portion. The connector is fixedly connected to the top cover and blocks the first assembly hole. The connector is provided with a second assembly hole passing through the connector along the first direction. The insulating sealing portion blocks the second assembly hole.

2. The battery cell according to claim 1, wherein: The surface roughness of the connecting member is Ra1, and the surface roughness of the top cover sheet is Ra2, satisfying: Ra1>Ra2.

3. The battery cell according to claim 1, wherein: The second assembly hole includes a first hole segment, a second hole segment and a third hole segment, the second hole segment is connected between the first hole segment and the third hole segment along the first direction, the insulating sealing portion is filled in the first hole segment, the second hole segment and the third hole segment, the minimum hole diameter of the first hole segment is R1 mm, the maximum hole diameter of the second hole segment is R2 mm, and the minimum hole diameter of the third hole segment is R3 mm, satisfying: R1>R2, R3>R2.

4. The battery cell according to any one of claims 1 to 3, characterized in that: The insulating member includes a first lower plastic and a second lower plastic that are clamped together. The first lower plastic is fixedly connected to the top cover sheet. The second lower plastic is spaced apart on a side of the first lower plastic away from the top cover sheet along the first direction. The first lower plastic and the second lower plastic enclose the assembly cavity.

5. The battery cell according to claim 4, characterized in that The first lower plastic includes a main body and ribs and buckles fixedly connected to the main body respectively. The second lower plastic is provided with matching holes penetrating the second lower plastic along the first direction at both ends along the third direction. The buckles are passed through the matching holes along the first direction and are engaged with the second lower plastic. The second lower plastic is provided with the ribs at both ends along the second direction. The main body, the buckles, the ribs and the second lower plastic are enclosed to form the assembly cavity. The first direction, the second direction and the third direction are perpendicular to each other.

6. The battery cell according to claim 5, characterized in that The second lower plastic includes a main body and a fixed part connected to each other, the matching hole is provided in the main body, the fixing parts are respectively provided at both ends of the main body along the third direction, the fixing parts are fixedly connected to the main body, and the fixing parts and the buckle are spaced apart along the third direction.

7. The battery cell according to claim 6, characterized in that The battery cell further includes an explosion-proof valve, the top cover sheet further includes an explosion-proof hole penetrating the top cover sheet along the first direction, the explosion-proof valve is fixedly connected to the top cover sheet and blocks the explosion-proof hole, and the explosion-proof hole and the first assembly hole are spaced apart along the second direction; The main body is provided with a first pressure relief hole that passes through the main body along the first direction, the main body is provided with a second pressure relief hole that passes through the main body along the first direction, the explosion-proof valve is arranged opposite to the first pressure relief hole, and the second pressure relief hole is arranged opposite to the wireless controller along the first direction.

8. The battery cell according to claim 7, characterized in that The main body is further provided with a third pressure relief hole penetrating the main body along the first direction. Along the first direction, the orthographic projection of the rib on the main body is located between the first pressure relief hole and the third pressure relief hole.

9. The battery cell according to claim 7, characterized in that: The main body is further provided with a weight-reducing hole, and the weight-reducing hole and the second pressure relief hole are spaced apart along the third direction.

10. A battery pack, characterized in that: The battery cell comprises the battery cell according to any one of claims 1 to 9.

Images