CN119812685A - Battery packs and electrical devices - Google Patents
Battery packs and electrical devices Download PDFInfo
- Publication number
- CN119812685A CN119812685A CN202411996494.3A CN202411996494A CN119812685A CN 119812685 A CN119812685 A CN 119812685A CN 202411996494 A CN202411996494 A CN 202411996494A CN 119812685 A CN119812685 A CN 119812685A
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- Prior art keywords
- circuit board
- battery pack
- projection
- along
- welding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The embodiment of the application provides a battery pack and an electric device. The battery pack comprises a first circuit board, a second circuit board, a connector, a flexible circuit board and a battery cell assembly. The second circuit board and the first circuit board are arranged at intervals along a first direction, the projection of the second circuit board is overlapped with the projection of the first circuit board along the first direction, the connector is connected to the second circuit board and located on one side of the second circuit board facing the first circuit board, the flexible circuit board comprises a first welding part welded to the first circuit board and a second welding part welded to the second circuit board, the flexible circuit board is provided with a first bending part, the first bending part is abutted to the connector, the battery cell assembly comprises a plurality of battery cells, and the battery cells are connected to the first circuit board.
Description
Technical Field
The application belongs to the technical field of batteries, and particularly relates to a battery pack and an electric device.
Background
The circuit module of the battery pack generally comprises a plurality of circuit boards, and connection structures are required to be arranged between the circuit boards to realize circuit connection and electric signal connection.
The layout of each circuit board and the connecting structure occupies more space, which is unfavorable for improving the integration level of the battery pack.
Disclosure of Invention
The embodiment of the invention provides a battery pack and an electric device, which can improve the integration level of the battery pack.
In a first aspect, an embodiment of the present invention provides a battery pack, including a first circuit board, a second circuit board, a connector, a flexible circuit board, and a battery cell assembly. The second circuit board and the first circuit board are arranged at intervals along a first direction, the projection of the second circuit board is overlapped with the projection of the first circuit board along the first direction, the connector is connected to the second circuit board and located on one side of the second circuit board facing the first circuit board, the flexible circuit board comprises a first welding part welded to the first circuit board and a second welding part welded to the second circuit board, the flexible circuit board is provided with a first bending part, the first bending part is abutted to the connector, the battery cell assembly comprises a plurality of battery cells, and the battery cells are connected to the first circuit board.
In the above embodiment, the projection of the connector is separated from the projection of the first circuit board in the first direction.
In one or more of the above alternative embodiments, the connector includes an inclined surface, and the first circuit board extends beyond the inclined surface in the first direction, and a portion of the first bending portion is located above the inclined surface.
In one or more of the above optional embodiments, the connector includes a limiting portion and a connecting portion, the connecting portion and the limiting portion form a receiving groove, a portion of the first bending portion is located in the receiving groove, and the first bending portion abuts against the limiting portion.
In one or more of the above optional embodiments, the connecting portion is closer to the first circuit board than the limiting portion, and the inclined surface is disposed on the connecting portion.
In one or more alternative embodiments, the battery pack includes a housing provided with an opening, the connection portion is fixed to the housing, and a portion of the connector is exposed outside the housing.
In one or more alternative embodiments, the second circuit board includes a first side and a second side spaced apart along the second direction, a projection of the first solder portion being located between a projection of the first side and a projection of the second side along the first direction, the flexible circuit board includes a second bend portion, a portion of the second bend portion being located between the first circuit board and the second circuit board, the second bend portion bypassing the second side.
In one or more of the above optional embodiments, the second bending portion abuts against the first circuit board.
In one or more alternative embodiments, the first circuit board has a first soldering region, the second circuit board has a second soldering region, the first soldering portion is soldered to the first soldering region, the second soldering portion is soldered to the second soldering region, and along the first direction, a projection of the first soldering region is located within a projection of the second circuit board, and a projection of the second soldering region is located within a projection of the first circuit board.
In one or more of the above alternative embodiments, the first solder region is provided on a surface of the first circuit board facing the second circuit board. The first bonding region is copper foil. The first welding part welds the first welding area through an SMT mode.
In one or more of the above alternative embodiments, the second solder region is disposed on a surface of the second circuit board remote from the first circuit board. The second bonding region is copper foil. The second welding part welds the second welding area by means of SMT.
In one or more alternative embodiments, the projection of the first welding region and the projection of the second welding region overlap in the first direction. The space between the first circuit board and the second circuit board is better utilized.
In one or more of the above alternative embodiments, at least a portion of the projection of the first bend is separated from the projection of the first circuit board along the first direction.
In one or more alternative embodiments, the first circuit board includes a third soldering region, the second circuit board includes a fourth soldering region, a projection of the third soldering region is separated from a projection of the second circuit board along the first direction, and the battery pack includes a first wire harness soldered to the third soldering region and the fourth soldering region, the first wire harness configured to transmit power.
In one or more of the above alternative embodiments, the first wire harness is soldered to a side of the second circuit board remote from the first circuit board, facilitating the placement of the first wire harness.
In one or more alternative embodiments, the first circuit board includes a fifth soldering region, the second circuit board includes a sixth soldering region, a projection of the fifth soldering region is separated from a projection of the second circuit board along the first direction, the battery pack includes a second wire harness soldered to the fifth soldering region and the sixth soldering region, and the second wire harness is configured to transmit power.
In one or more of the above alternative embodiments, the second wire harness is soldered to a side of the second circuit board remote from the first circuit board, facilitating the placement of the second wire harness.
In one or more of the above alternative embodiments, the first wire harness and the second wire harness are located on both sides of the flexible circuit board, as viewed in a direction opposite to the first direction.
In one or more of the above alternative embodiments, the flexible circuit board is configured to transmit parameters of the cells.
In one or more alternative embodiments, the battery pack includes a plurality of conductive tabs soldered to the first circuit board, the plurality of conductive tabs electrically connected to the flexible circuit board, the battery cells including electrode terminals, the electrode terminals being connected to the conductive tabs, the conductive tabs configured to collect parameters of the battery cells.
In a second aspect, an embodiment of the present invention provides an electrical device, the device comprising a battery pack as described in the first aspect, the battery pack being configured to provide electrical energy.
According to the battery pack and the power utilization device, the first circuit board and the second circuit board are arranged in a stacked mode along the first direction, so that the occupied space of the first electric connection part and the second circuit board along the second direction and the third direction is reduced, meanwhile, the flexible circuit board is bent and then arranged between the first circuit board and the second circuit board, electric connection between the first circuit board and the second circuit board can be achieved, gaps between the first circuit board and the second circuit board are fully utilized, the occupied space of the flexible circuit board along the second direction and/or the third direction of the battery pack is reduced, the size of the battery pack along the second direction and the third direction is reduced, and the integration level of the battery pack is improved.
Drawings
In order to more clearly describe the technical solution of the embodiments of the present invention, the following will briefly describe the drawings that are required to be used in the embodiments of the present invention.
Fig. 1 is a schematic view illustrating a partial structure of a battery pack according to some embodiments of the present application;
Fig. 2 is an exploded view of a partial structure of a battery pack according to some embodiments of the present application;
fig. 3 is a schematic plan view of a battery pack according to some embodiments of the present application;
FIG. 4 is an enlarged schematic view of the structure shown in FIG. 3A;
fig. 5 is an exploded view of a battery pack according to some embodiments of the present application;
FIG. 6 is an enlarged schematic view of the structure shown at B in FIG. 5;
fig. 7 is a schematic structural diagram of a second circuit board and a connector of a battery pack according to some embodiments of the present application;
FIG. 8 is a partial cross-sectional view of a battery pack provided in some embodiments of the application;
Fig. 9 is a schematic structural view of a battery pack according to some embodiments of the present application;
fig. 10 is another schematic structural view of a battery pack according to some embodiments of the present application;
Fig. 11 is a schematic view showing a partial structure of a battery pack according to other embodiments of the present application.
Reference numerals illustrate:
1. the device comprises a first circuit board, a first welding area, a third welding area, a fifth welding area and a third welding area, wherein the first circuit board is provided with a first welding area and a third welding area;
2. The second circuit board, 21, a first side surface, 22, a second side surface, 23, a second welding area, 24, a fourth welding area, 25, a sixth welding area;
3. 31, a limit part, 32, a connecting part, 321, an inclined plane, 33 and a containing groove;
4. 41, a first bending part, 42, a second bending part, 43, a first welding part, 44, a second welding part;
5. The battery cell assembly, 51, battery cell, 52 electrode terminals;
6. a housing 61, a first housing 611, an opening 62, a second housing;
71. a first wire harness 72, a second wire harness;
8. A conductive sheet;
m, a radiator;
x, a first direction, Y, a second direction, Z and a third direction.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the particular embodiments described herein are meant to be illustrative of the invention only and not limiting. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising" does not exclude the presence of additional identical elements in a process, method, article, or apparatus that comprises the element.
The battery pack and the power consumption device of the present application are described below with reference to the accompanying drawings.
As shown in fig. 1 to 6, an embodiment of the present application provides a battery pack, wherein the battery pack includes a battery cell assembly 5, the battery cell assembly 5 includes a plurality of battery cells 51, the battery cells 51 are used to supply electric power, and each battery cell 51 includes an electrode terminal 52.
In some embodiments, the battery pack includes a first circuit board 1, a second circuit board 2, and a flexible circuit board 4. The flexible circuit board 4 includes a first soldering portion 43 and a second soldering portion 44, the first soldering portion 43 being soldered to the first circuit board 1, the second soldering portion 44 being soldered to the second circuit board 2. The flexible circuit board 4 is configured to transmit core parameters and/or power.
In some embodiments, the second circuit board 2 is spaced apart from the first circuit board 1 along the first direction X. Along the first direction X, the projection of the second circuit board 2 coincides with the projection portion of the first circuit board 1. The space of the battery pack along the first direction X is utilized, the space of the first circuit board 1 and the second circuit board 2 along the second direction Y and/or the third direction Z of the battery pack is reduced, and the size of the battery pack along the second direction Y and the third direction Z is reduced. The first direction X, the second direction Y and the third direction Z are mutually perpendicular.
In some embodiments, the first circuit board 1 and the second circuit board 2 are substantially perpendicular to the first direction X, and the first circuit board 1 and the second circuit board 2 are substantially parallel.
In some embodiments the battery pack comprises a connector 3, the connector 3 being connected to the second circuit board 2, the connector 3 being located on the side of the second circuit board 2 facing the first circuit board 1, it being understood that the connector 3 is located in the space between the first circuit board 1 and the second circuit board 2. Optionally, the connector 3 is soldered to the second circuit board 2.
In some embodiments, the connector 3 is an aviation plug connector, the connector 3 being configured for electrical power connection and signal transmission between the battery pack and the powered device.
In some embodiments, the flexible circuit board 4 has a first bending portion 41, the first bending portion 41 is formed by bending the flexible circuit board 4, the first bending portion 41 abuts against the connector 3, and a limit is provided for the first bending portion 41 by the connector 3, so as to maintain the position of the flexible circuit board 4 between the first circuit board 1 and the second circuit board 2.
Through setting up flexible circuit board 4 after crooked between first circuit board 1 and second circuit board 2, can utilize the space between first circuit board 1 and the second circuit board 2 when being connected first circuit board 1 and second circuit board 2 electricity, reduce flexible circuit board 4 along group battery second direction Y and/or third direction Z's space, be favorable to reducing the group battery along the size of second direction Y and third direction Z, promote the integrated level of group battery.
In some embodiments, the first circuit board 1 is provided with electronics, including but not limited to resistors, chips, etc.
In some embodiments, the second circuit board 2 is provided with a BMS assembly (Battery MANAGEMENT SYSTEM) which can control the charging and discharging of the Battery cell assembly 5, prevent the overcharge and overdischarge, extend the life of the Battery cell assembly 5, and ensure the safety and stability of the Battery pack.
As shown in fig. 3 and 4, in some embodiments, the projection of the connector 3 is separated from the projection of the first circuit board 1 along the first direction X. The connector 3 and the first circuit board 1 have a space along the second direction Y, so that a space is provided for the flexible circuit board 4, so that the flexible circuit board 4 extends along the second direction Y after being bent and is connected with the first circuit board 1.
As shown in fig. 8, in some embodiments, the connector 3 includes an inclined surface 321, and the first circuit board 1 extends beyond the inclined surface 321 along the first direction X, and a portion of the first bending portion 41 is located above the inclined surface 321 along the first direction X. The inclined surface 321 can guide and avoid the first bending portion 41 of the flexible circuit board 4, and provides an installation space for the first bending portion 41.
As shown in fig. 7 and 8, in some embodiments, the connector 3 includes a limiting portion 31 and a connecting portion 32, the connecting portion 32 and the limiting portion 31 form a receiving groove 33, a portion of the first bending portion 41 is located in the receiving groove 33, and the first bending portion 41 abuts against the limiting portion 31. The limiting part 31 provides support for the first bending part 41, the position of the first bending part 41 is maintained, the elastic restoring force generated by bending of the first bending part 41 is reduced, and the conditions that stress concentration occurs at the junction between the first bending part 41 and the first circuit board 1 and the junction between the second bending part 42 and the second circuit board 2 to damage the junction are reduced.
In some embodiments, the connecting portion 32 is connected to a side of the limiting portion 31 away from the second circuit board 2 along the first direction X, and the limiting portion 31 and the connecting portion 32 are integrally connected, so that the connecting portion has good structural strength. The stopper 31 and the connecting portion 32 have an L-shaped structure.
As shown in fig. 7 and 8, in some embodiments, the connection portion 32 is closer to the first circuit board 1 than the limit portion 31, and the inclined surface 321 is provided at the connection portion 32, and the inclined surface 321 gradually inclines in a direction approaching the first circuit board 1 along the first direction X. The flexible circuit board 4 is guided to extend in a direction approaching the first circuit board 1 by the inclined surface 321 in cooperation with the limiting portion 31.
In some embodiments, the first bending portion 41 abuts against the inclined surface 321.
As shown in fig. 8 to 11, in some embodiments, the battery pack includes a housing 6, a portion of the connector 3, the first circuit board 1, the second circuit board 2, the flexible circuit board 4, and the battery cell assembly 5 are all disposed inside the housing 6, and protection is provided for the portion of the connector 3 located inside the housing 6, the first circuit board 1, the second circuit board 2, the flexible circuit board 4, and the battery cell assembly 5 by the housing 6.
In some embodiments, as shown in fig. 10, the housing 6 is provided with an opening 611, the connection portion 32 is fixed to the housing 6, and a portion of the connector 3 is exposed to the outside of the housing 6 for electrical connection with other components of the electrical device.
In some embodiments, the housing 6 includes a first shell 61 and a second shell 62, the first shell 61 and the second shell 62 being removably sealingly connected and enclosing to form the complete housing 6.
In some embodiments, a heat sink M is provided on the first and/or second housings 61, 62 to dissipate heat from the cell assembly 5.
As shown in fig. 3 to 7, in some embodiments, the second circuit board 2 includes a first side 21 and a second side 22 that are spaced apart along the second direction Y, and a projection of the first solder portion 43 is located between a projection of the first side 21 and a projection of the second side 22 along the first direction X.
The flexible circuit board 4 includes a second bending portion 42, and a portion of the second bending portion 42 is located between the first circuit board 1 and the second circuit board 2, and the second bending portion 42 bypasses the second side surface 22.
As shown in fig. 3 to 7, in some embodiments, the second bending portion 42 bypasses the second side surface 22 from the side of the second circuit board 2 facing the first circuit board 1, extends to the side of the second circuit board 2 facing away from the first circuit board 1, and is soldered to the second circuit board 2.
The flexible circuit board 4 is electrically connected with the second circuit board 2, the size of the flexible circuit board 4 in the first direction X is increased, the bending pressure born by the flexible circuit board 4 is reduced, the service life of the flexible circuit board 4 is prolonged, a part of the flexible circuit board 4 is bent to form a second bending part 42 and then extends along a state approximately perpendicular to the first direction X, the second bending part is connected with the second circuit board 2 in a state approximately parallel to the second circuit board 2, the connection reliability between the flexible circuit board 4 and the second circuit board 2 is improved, and the damage condition caused by stress concentration between the flexible circuit board 4 and the second circuit board 2 is reduced.
In some embodiments, referring to fig. 11, the second bending portion 42 abuts against the first circuit board 1, and the first circuit board 1 provides support and retention for the second bending portion 42, so as to reduce elastic restoring force generated by bending the flexible circuit board 4, and reduce damage caused by stress concentration at the connection between the first bending portion 41 and the first circuit board 1 and the connection between the second bending portion 42 and the second circuit board 2.
In some embodiments, the first circuit board 1 has a first soldering region 13, the second circuit board 2 has a second soldering region 23, the first soldering portion 43 is soldered to the first soldering region 13, and the second soldering portion 44 is soldered to the second soldering region 23. For example by means of SMT.
In some embodiments, the first soldering region 13 is provided on the surface of the first circuit board 1 facing the second circuit board 2. The first bonding region 13 is copper foil. The first welding portion welds the first welding region 13 by means of SMT.
In some embodiments, the second soldering region 23 is provided on a surface of the second circuit board 2 remote from the first circuit board 2. The second bonding region 23 is copper foil. The second welding portion welds the second welding region 23 by means of SMT.
In some embodiments, along the first direction X, the projection of the first welding region 13 and the projection of the second welding region 23 overlap. The space between the first circuit board 1 and the second circuit board 2 is advantageously better utilized.
In some embodiments, along the first direction X, the projection of the first soldering region 13 is located in the projection of the second circuit board 2, and the projection of the second soldering region 23 is located in the projection of the first circuit board 1, so that the first circuit board 1 and the second circuit board 2 are partially staggered along the second direction Y, so that the sizes of the first soldering region 13 and the second soldering region 23 along the second direction Y can be reduced, the bending radians of the first bending portion 41 and the second bending portion 42 can be reduced, and the sizes of the whole flexible circuit board 4 along the first direction X and the second direction Y can be reduced.
As shown in fig. 4, in some embodiments, at least a portion of the projection of the first bending portion 41 and the projection of the first circuit board 1 are separated along the first direction X, so that a portion of the flexible circuit board 4 is bent to form the first bending portion 41 and then extends along a state substantially perpendicular to the first direction X, and is connected to the first circuit board 1 in a state substantially parallel to the first circuit board 1, so as to improve connection reliability between the flexible circuit board 4 and the first circuit board 1 and reduce damage caused by stress concentration between the flexible circuit board 4 and the first circuit board 1.
As shown in fig. 6, in some embodiments, the first circuit board 1 includes a third solder area 14 and the second circuit board 2 includes a fourth solder area 24. The battery pack includes a first wire harness 71, the first wire harness 71 being welded to the third welding region 14 and the fourth welding region 24, the first wire harness 71 being configured to transmit power, for example, the first wire harness 71 may be a positive electrode, and in other embodiments, the first wire harness 71 may be a negative electrode.
As shown in fig. 6, in some embodiments, the third soldering region 14 is disposed on a side of the first circuit board 1 facing the second circuit board 2, the fourth soldering region 24 is disposed on a side of the second circuit board 2 facing away from the first circuit board 1, and the first wire harness 71 is soldered to a side of the second circuit board 2 facing away from the first circuit board 1, so as to facilitate soldering the first wire harness 71.
In some embodiments, along the first direction X, the projection of the third soldering region 14 and the projection of the second circuit board 2 are separated, the first wire harness 71 extends along the second direction Y when connecting the third soldering region 14 and the fourth soldering region 24, the bending of the first wire harness 71 is reduced, the difficulty in connection layout of the first wire harness 71 is reduced, and the reliability of connection between the first wire harness 71 and the third soldering region 14 and between the first wire harness 71 and the fourth soldering region 24 is improved.
As shown in fig. 6, in some embodiments, the first circuit board 1 includes a fifth solder area 15 and the second circuit board 2 includes a sixth solder area 25. The battery pack includes a second wire harness 72, the second wire harness 72 being welded to the fifth welding area 15 and the sixth welding area 25, the second wire harness 72 being configured to transmit power, for example, the second wire harness 72 may be a positive electrode, and in other embodiments, the second wire harness 72 may be a negative electrode. One of the first wire harness 71 and the second wire harness 72 is positive and negative, and the other is negative.
As shown in fig. 6, in some embodiments, the fifth soldering region 15 is disposed on a side of the first circuit board 1 facing the second circuit board 2, the sixth soldering region 25 is disposed on a side of the second circuit board 2 facing away from the first circuit board 1, and the second wire harness 72 is soldered to a side of the second circuit board 2 facing away from the first circuit board 1, so as to facilitate soldering the second wire harness 72.
In some embodiments, along the first direction X, the projection of the fifth welding area 15 is separated from the projection of the second circuit board 2, the second wire harness 72 extends along the second direction Y, bending of the second wire harness 72 is reduced, difficulty in connection layout of the second wire harness 72 is reduced, and reliability of connection between the second wire harness 72 and the fifth welding area 15 and between the second wire harness 72 and the sixth welding area 25 is improved.
In some embodiments, the flexible circuit board 4 is configured to transmit parameters of the cells 51, including but not limited to voltage, current, temperature, resistance.
As shown in fig. 6, in some embodiments, the battery pack includes a conductive sheet 8 soldered to the first circuit board 1, the conductive sheet 8 being electrically connected to the flexible circuit board 4 via a conductive line of the first circuit board 1.
In some embodiments, electrode terminals 52 are connected to conductive sheet 8, and conductive sheet 8 is configured to collect parameters of cell 51, such as voltage signals from conductive sheet 8 to collector terminals 52, to monitor the charge and discharge safety of cell assembly 5.
The embodiment of the application also provides an electric device, wherein the electric device comprises the battery pack, and the battery pack is used for providing electric energy.
In the power consumption device provided by the embodiment of the application, in the battery pack, the flexible circuit board 4 is respectively connected with the first circuit board 1 and the second circuit board 2, the flexible circuit board 4 is provided with the first bending part 41, the first bending part 41 is formed by bending the flexible circuit board 4, the first bending part 41 is abutted against the connector 3, and the connector 3 provides support for the first bending part 41 and the whole flexible circuit board 4, so that the position of the flexible circuit board 4 between the first circuit board 1 and the second circuit board 2 is maintained.
In the foregoing, only the specific embodiments of the present invention are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present invention is not limited thereto, and any equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present invention, and they should be included in the scope of the present invention.
Claims (14)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411996494.3A CN119812685A (en) | 2024-12-31 | 2024-12-31 | Battery packs and electrical devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411996494.3A CN119812685A (en) | 2024-12-31 | 2024-12-31 | Battery packs and electrical devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119812685A true CN119812685A (en) | 2025-04-11 |
Family
ID=95266063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411996494.3A Pending CN119812685A (en) | 2024-12-31 | 2024-12-31 | Battery packs and electrical devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN119812685A (en) |
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2024
- 2024-12-31 CN CN202411996494.3A patent/CN119812685A/en active Pending
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