A battery and electronic device

Abstract

This utility model relates to the field of battery technology and discloses a battery and electronic device. By setting magnetic field cancelling plates on the top and sides of the battery cell, the magnetic field generated by the cancelling plates after the battery cell is energized is opposite in direction to the magnetic field generated by the extra length of the negative electrode, thereby achieving mutual cancellation of magnetic fields and significantly reducing magnetic field leakage. This improvement not only enhances battery performance but also reduces the interference of magnetic field leakage on sensitive circuits and components inside the electronic device, improving the performance stability and reliability of the electronic device. Furthermore, by rationally designing the connection method and layout of the magnetic field cancelling plates, this utility model further enhances the magnetic field cancellation effect, ensuring the stability and safety of the battery under various operating conditions. Overall, this utility model significantly reduces the impact of magnetic field leakage on electronic devices while improving battery performance, possessing significant technical advantages and market application prospects.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery and electronic device. Background Technology

[0002] Currently, based on safety regulations, in battery cell structures manufactured using the winding process, the negative electrode is longer than the positive electrode, specifically by 1 / 4 or 1 / 2 of a turn. Figure 1 As shown. In Figure 1 In the diagram, red represents the positive electrode, black represents the negative electrode, yellow arrows indicate the direction of electron flow inside the positive electrode, and blue arrows indicate the direction of electron flow inside the negative electrode. When the battery cell is energized, according to the basic principle of electromagnetism that "opposite currents produce opposite magnetic fields, and opposite magnetic fields cancel each other out," the extended section of the negative electrode lacks a corresponding positive electrode. This results in the magnetic field generated by this extended section of the negative electrode not being effectively canceled out, leading to magnetic field leakage. When the battery is used in various electronic devices, this leakage magnetic field can interfere with sensitive circuits and components inside the electronic devices, affecting their performance stability and reliability.

[0003] Therefore, in order to improve battery performance and ensure the stable operation of electronic devices, it is necessary to improve and optimize existing battery technologies.

[0004] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0005] This invention provides a battery and electronic device. By setting magnetic field cancelling plates on the top and side surfaces of the battery cell, the magnetic field generated by the extra length of the negative electrode plate is effectively canceled, the magnetic field leakage is eliminated or reduced, the battery performance is improved, and the stable operation of the electronic device is ensured.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] In a first aspect, this utility model provides a battery, comprising a battery cell and a magnetic field cancelling sheet; wherein...

[0008] The battery cell has a wound structure, including a positive electrode and a negative electrode, wherein the length of the negative electrode is greater than the length of the positive electrode;

[0009] The magnetic field cancelling plate is disposed on the top and side surfaces of the battery cell and is connected to the negative electrode or the positive electrode.

[0010] When the battery cell is powered on, the magnetic field generated by the magnetic field cancelling plate is opposite in direction to the magnetic field generated by the extra length of the negative electrode plate, so as to achieve magnetic field cancellation.

[0011] Furthermore, in the battery, when the magnetic field cancelling plate is connected to the positive electrode plate, the magnetic field cancelling plate extends from the connection point along the winding direction of the negative electrode plate, so that when the cell is energized, the magnetic field generated by the magnetic field cancelling plate is opposite in direction to the magnetic field generated by the extra length portion of the negative electrode plate.

[0012] Alternatively, when the magnetic field cancelling plate is connected to the negative electrode plate, the magnetic field cancelling plate extends from the connection point in the opposite direction to the winding direction of the negative electrode plate, so that when the battery cell is energized, the magnetic field generated by the magnetic field cancelling plate is opposite in direction to the magnetic field generated by the extra length portion of the negative electrode plate.

[0013] Furthermore, in the battery, the magnetic field cancelling sheet includes a first cancelling section and a second cancelling section;

[0014] The first offset section is disposed on the top surface of the battery cell and is connected to the negative electrode or the positive electrode.

[0015] The second offset section is disposed on the side of the battery cell and is connected to the first offset section.

[0016] Furthermore, in the battery, when the magnetic field cancelling plate is connected to the positive electrode plate, the magnetic field cancelling plate is provided with a positive electrode pad;

[0017] Alternatively, when the magnetic field cancelling sheet is connected to the negative electrode sheet, the magnetic field cancelling sheet is provided with a negative electrode pad.

[0018] Furthermore, in the battery, when the first offset section is connected to the positive electrode plate, the end of the second offset section is bent to serve as the positive electrode pad;

[0019] When the first offset section is connected to the negative electrode sheet, the end of the second offset section is bent to serve as the negative electrode pad.

[0020] Furthermore, the battery also includes a casing;

[0021] The battery cell is disposed inside the housing;

[0022] The magnetic field cancelling plate is disposed on the outside of the housing.

[0023] Furthermore, in the battery, the cell also includes a separator;

[0024] The negative electrode, separator, positive electrode, and separator are stacked in sequence and then wound to form a wound structure.

[0025] Furthermore, in the battery, the magnetic field cancelling sheet is made of a conductive material, and the resistivity of the conductive material is less than the resistivity of the positive electrode and the negative electrode.

[0026] Furthermore, in the battery, the surface of the magnetic field cancelling sheet is coated with an insulating layer.

[0027] Secondly, the present invention provides an electronic device, including the battery provided in the first aspect above.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] This invention provides a battery and electronic device that effectively solves the problem in existing battery technology where the magnetic field generated by the excess length of the negative electrode cannot be canceled by incorporating magnetic field cancelling plates on the top and sides of the battery cell. Specifically, the magnetic field generated by the magnetic field cancelling plates after the battery cell is energized is opposite in direction to the magnetic field generated by the excess length of the negative electrode, thus achieving mutual cancellation of magnetic fields and significantly reducing magnetic field leakage. This improvement not only enhances battery performance but also reduces the interference of magnetic field leakage on sensitive circuits and components inside electronic devices, improving the performance stability and reliability of the electronic devices. Furthermore, by rationally designing the connection method and layout of the magnetic field cancelling plates, this invention further enhances the magnetic field cancellation effect, ensuring the stability and safety of the battery under various operating conditions. Overall, this invention significantly reduces the impact of magnetic field leakage on electronic devices while improving battery performance, demonstrating significant technical advantages and promising market application prospects.

[0030] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0032] Figure 1 This is a schematic diagram of the winding of the positive and negative electrode plates in the existing technology;

[0033] Figure 2This is one of the structural schematic diagrams of a battery provided in Embodiment 1 of this utility model;

[0034] Figure 3 This is a second schematic diagram of the structure of a battery provided in Embodiment 1 of this utility model;

[0035] Figure 4 This is the third schematic diagram of the structure of a battery provided in Embodiment 1 of this utility model;

[0036] Figure 5 This is the fourth structural schematic diagram of a battery provided in Embodiment 1 of this utility model.

[0037] Figure label:

[0038] 1. Battery cell; 2. Magnetic field cancelling sheet; 3. Positive electrode pad; 4. Negative electrode pad; 5. Housing.

[0039] Positive electrode 11, negative electrode 12;

[0040] First offset segment 21, second offset segment 22. Detailed Implementation

[0041] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0042] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0043] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0044] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0045] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0046] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0047] In this application, expressions such as "greater than", "less than", and "exceeding" are understood to exclude the stated number; expressions such as "above", "below", and "within" are understood to include the stated number. Furthermore, in the description of the embodiments of this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times", unless otherwise explicitly specified.

[0048] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0049] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0050] Example 1

[0051] Please refer to Figure 2-3 This utility model provides a battery, including a battery cell 1 and a magnetic field cancelling sheet 2;

[0052] Cell 1 employs a wound structure, a common and advantageous structure in battery manufacturing. Cell 1 includes a positive electrode 11 and a negative electrode 12. Notably, due to safety regulations, the length of the negative electrode 12 is set to be greater than the length of the positive electrode 11.

[0053] The magnetic field cancelling plate 2 is cleverly positioned on the top and side surfaces of the cell 1 and is connected to the negative electrode plate 12 or the positive electrode plate 11. This connection method ensures that the magnetic field cancelling effect can be achieved during battery operation.

[0054] Specifically, when cell 1 is energized, it generates a corresponding magnetic field. At this time, the magnetic field cancelling plate 2 also generates a magnetic field due to the current. However, it is worth noting that the direction of the magnetic field generated by the magnetic field cancelling plate 2 is exactly opposite to the direction of the magnetic field generated by the extra length of the negative electrode plate 12. Based on the principle of magnetic field interaction, magnetic fields with opposite directions will cancel each other out, thereby achieving the effect of canceling the magnetic field inside the battery.

[0055] This innovative design of the present invention effectively solves a long-standing key problem in existing battery technology—the inability to effectively cancel the magnetic field generated by the excess length of the negative electrode 12—by rationally setting magnetic field cancelling plates 2 on the top and side surfaces of the battery cell 1. In existing battery technology, the magnetic field generated by the excess length of the negative electrode 12 often leaks out, adversely affecting the battery's performance and surrounding electronic devices. This improvement ensures that the magnetic field generated by the magnetic field cancelling plate 2 after the battery cell 1 is energized is opposite in direction to the magnetic field generated by the excess length of the negative electrode 12, thus achieving mutual cancellation of the magnetic fields. This process significantly reduces magnetic field leakage and is crucial for improving battery performance.

[0056] From the perspective of improving battery performance, reducing magnetic field leakage helps to reduce internal energy loss and improve energy conversion efficiency, thereby extending battery life and enhancing battery endurance. Simultaneously, the reduction in magnetic field leakage significantly reduces the impact on sensitive circuits and components within electronic devices. In modern electronic devices, many precision circuits and components are extremely sensitive to magnetic field interference; even minute changes in the magnetic field can lead to performance degradation or even malfunction. The battery of this invention effectively reduces magnetic field leakage, providing a more stable electromagnetic environment for electronic devices and greatly improving their performance stability and reliability.

[0057] Furthermore, this invention further enhances the magnetic field cancellation effect through a rationally designed connection method and layout of the magnetic field cancelling sheet. Regarding the connection method, the current conduction path and magnetic field distribution pattern are fully considered. By connecting the magnetic field cancelling sheet 2 to the positive electrode 11 or the negative electrode 12, it is ensured that the magnetic field cancelling sheet 2 can form efficient electromagnetic coupling with the negative electrode of the cell 1. In terms of layout, based on the shape of the cell 1 and the characteristics of the magnetic field distribution, the magnetic field cancelling sheet 2 is precisely positioned on the top and side surfaces, enabling it to cancel the magnetic field of the extended portion of the negative electrode 12 on multiple surfaces of the battery, namely the side and top surfaces. This further enhances the magnetic field cancellation effect and ensures the stability and safety of the battery under various operating conditions.

[0058] Overall, the battery of this invention significantly reduces the impact of magnetic field leakage on electronic devices while improving its own performance, bringing positive and far-reaching influence to the development of battery technology and electronic devices. Whether from a technical or market application perspective, this invention has significant advantages and broad prospects, and is expected to promote technological progress and industrial upgrading in the battery industry and related electronic device fields.

[0059] Please refer to this again. Figure 2-3 In one embodiment of this invention, the extension direction of the magnetic field cancelling plate 2 varies depending on the object to which it is connected. However, regardless of the change in its extension direction, it can still play the key role of magnetic field cancellation.

[0060] Specifically, there are two different connection scenarios and their corresponding extension methods:

[0061] On the one hand, when the magnetic field cancelling plate 2 is connected to the positive electrode plate 11, the magnetic field cancelling plate 2 will extend from its connection point with the positive electrode plate 11 along the winding direction of the negative electrode plate 12. (See reference for details.) Figure 2 This design of the extended direction is not arbitrary, but based on in-depth research into the distribution of the magnetic field inside the battery. After the cell 1 is energized, the current flows through the positive and negative electrodes, generating corresponding magnetic fields. Because the magnetic field cancelling plate 2 extends in the aforementioned specific direction, the magnetic field it generates is opposite in direction to the magnetic field generated by the extra length of the negative electrode 12. According to the basic principle of magnetic field interaction, magnetic fields in opposite directions cancel each other out, thereby effectively weakening the excess magnetic field generated inside the battery by the extra length of the negative electrode 12, reducing the possibility of magnetic field leakage, and thus improving the overall performance and stability of the battery.

[0062] On the other hand, when the magnetic field cancelling plate 2 is connected to the negative electrode plate 12, the magnetic field cancelling plate 2 will extend from the connection point in the opposite direction to the winding direction of the negative electrode plate 12. (See reference for details.) Figure 3This reverse extension design is also for the purpose of magnetic field cancellation. During the operation of cell 1, the magnetic field cancelling plate 2 generates a magnetic field due to the current. This reverse extension arrangement ensures that the direction of its generated magnetic field is opposite to the direction of the magnetic field generated by the extended portion of the negative electrode plate 12. In this way, the two magnetic fields cancel each other out, further reducing the strength of the internal magnetic field of the battery, reducing interference from the magnetic field to the battery itself and surrounding electronic devices, ensuring stable operation of the battery under various working environments, and improving the reliability and safety of electronic devices using the battery.

[0063] In summary, this utility model cleverly designs the extension direction of the magnetic field cancelling plate 2 according to the different objects to which it is connected. Whether the magnetic field cancelling plate 2 is connected to the positive electrode plate 11 or the negative electrode plate 12, it can accurately achieve the function of magnetic field cancellation. This provides an innovative solution for the optimization and development of battery technology and has significant technical value and application prospects.

[0064] Please refer to Figure 4-5 In one embodiment of this invention, the magnetic field cancelling plate 2 adopts a segmented structural design, specifically including two key parts: a first cancelling section 21 and a second cancelling section 22. This segmented design aims to achieve the magnetic field cancelling function more efficiently and accurately, thereby improving the overall performance of the battery.

[0065] The first cancellation section 21 is carefully positioned on the top surface of the battery cell 1, an area that is prone to affecting the surrounding environment. The first cancellation section 21 is connected to either the negative electrode 12 or the positive electrode 11. Through this connection, the first cancellation section 21 generates a magnetic field in a specific direction when the battery cell 1 is energized, due to the flow of current, and cancels the magnetic field on the excess length of the negative electrode 12 at the top of the battery cell 1.

[0066] The second cancellation section 22 is disposed on the side of the battery cell 1. The side of the battery cell 1 is also an area that is prone to affecting the surrounding environment, and the placement of the second cancellation section 22 can effectively cancel the magnetic field in this area. Furthermore, the second cancellation section 22 is connected to the first cancellation section 21 to form an organic whole. This connection method ensures that the magnetic field cancellation sheet 2 can work together on the top and side surfaces of the battery cell 1 to play a joint role.

[0067] When cell 1 is energized, current flows through the positive and negative electrodes, generating a magnetic field. At this time, the first cancelling section 21 and the second cancelling section 22, due to their connection with either the negative electrode 12 or the positive electrode 11, also generate corresponding magnetic fields. By rationally designing the shape, size, and connection method of the first cancelling section 21 and the second cancelling section 22, the magnetic fields they generate are opposite in direction to the magnetic field generated by the extra length of the negative electrode 12. According to the principle of magnetic field interaction, magnetic fields in opposite directions cancel each other out, effectively reducing the excess magnetic field generated inside the battery due to the extra length of the negative electrode 12 and lowering the degree of magnetic field leakage.

[0068] This segmented magnetic field cancelling plate 2 offers several advantages. Firstly, it can more precisely cancel magnetic fields at different locations within the battery cell 1, improving the efficiency and effectiveness of magnetic field cancellation. Secondly, by rationally arranging the first cancellation segment 21 and the second cancellation segment 22, effective control of the magnetic field can be achieved without significantly increasing the battery's size and weight, which is beneficial for battery miniaturization and weight reduction. Furthermore, this design enhances the structural stability and reliability of the magnetic field cancelling plate 2, ensuring its continuous and stable magnetic field cancellation function during long-term battery use, providing strong protection for battery performance stability and safety.

[0069] In summary, the magnetic field cancelling sheet 2 in this embodiment of the present invention adopts a segmented design including a first cancelling section 21 and a second cancelling section 22, which are respectively disposed on the top surface and the side surface of the battery cell 1 and connected to each other. This innovative design achieves a highly efficient magnetic field cancelling function, and has significant technical advantages and application value in improving battery performance and reducing magnetic field interference.

[0070] Understandably, the specific dimensions of the first offsetting section 21 and the second offsetting section 22, as well as their respective proportions within the overall magnetic field offsetting sheet 2, are optimized based on actual application requirements. Specifically, the length and width of each of the first offsetting section 21 and the second offsetting section 22 can be precisely adjusted according to different battery specifications, cell structures, and magnetic field distributions. This flexibility ensures that the magnetic field offsetting sheet can effectively adapt to various battery designs, thereby achieving the best magnetic field offsetting effect.

[0071] Please refer to this again. Figure 4-5 In one embodiment of this invention, corresponding pad structures are provided on the magnetic field cancelling plate 2 to achieve a stable connection with external devices such as circuit boards, so as to ensure the reliable operation of the battery in the overall circuit system, depending on the different connection situations between the magnetic field cancelling plate 2 and the positive and negative electrode plates.

[0072] Specifically, when the magnetic field cancelling plate 2 is connected to the positive electrode plate 11, a positive electrode pad 3 is provided on the magnetic field cancelling plate 2. The positive electrode pad 3 plays a crucial role, effectively drawing the positive electrode plate 11 out of the battery and establishing a stable electrical connection bridge between the positive electrode plate 11 and external components such as the circuit board. During battery operation, current needs to flow out from the positive electrode plate 11, complete the corresponding functions through the external circuit, and then flow back to the battery. With its reasonable structural design and high-strength connection performance, the positive electrode pad 3 ensures stable and reliable current transmission, avoiding problems such as current interruption and voltage fluctuation caused by poor connection, thereby ensuring the normal operation of the entire circuit system.

[0073] Conversely, when the magnetic field cancelling plate 2 is connected to the negative electrode plate 12, a negative electrode pad 4 is provided on the magnetic field cancelling plate 2. The function of the negative electrode pad 4 is similar to that of the positive electrode pad 3; it leads the negative electrode plate 12 out from inside the battery, enabling it to achieve a stable connection with external components such as circuit boards. During the charging and discharging process of the battery, the negative electrode plate 12 also plays a crucial role. The presence of the negative electrode pad 4 ensures the quality of the electrical connection between the negative electrode plate 12 and the external circuit, allowing current to flow smoothly between the battery and the external circuit, providing the necessary conditions for the normal operation of the battery.

[0074] Furthermore, regarding the segmented structure of the magnetic field cancelling plate 2, when the first cancelling segment 21 is connected to the positive electrode plate 11, the end of the second cancelling segment 22 is bent, and this bent part cleverly serves as the positive electrode pad 3. This design has several advantages. On the one hand, it makes full use of the structure of the magnetic field cancelling plate 2 itself, without the need to add additional complex pad components, simplifying the overall structure of the battery and reducing manufacturing costs. On the other hand, through a reasonable bending process, it can ensure that the end of the second cancelling segment 22 forms good electrical contact with the positive electrode plate 11 and the external circuit, improving the reliability and stability of the connection.

[0075] Similarly, when the first cancellation section 21 is connected to the negative electrode 12, the end of the second cancellation section 22 is also bent to serve as the negative electrode pad 4. This unified design approach allows the magnetic field cancellation plate 2 to be connected to external devices in a simple and effective manner under different connection conditions, ensuring both the functional integrity of the battery and the rationality and economy of the structural design.

[0076] In summary, this utility model embodiment cleverly sets up the positive electrode pad 3 or the negative electrode pad 4 according to the different connection situations between the magnetic field canceling sheet 2 and the positive and negative electrode sheets, and realizes the pad function by bending the end of the second canceling section 22. This innovative design ensures a stable connection between the battery and external devices such as the circuit board, and provides a solid guarantee for the reliable operation of the battery in various application scenarios.

[0077] Please refer to this again. Figure 4-5 In one embodiment of this invention, the battery also includes a housing 5 as an important component in its structural design.

[0078] Specifically, the battery cell 1 is housed inside the casing 5. The casing 5 provides a relatively enclosed and safe working environment for the battery cell 1. On the one hand, the casing 5 can effectively prevent direct damage to the battery cell 1 from external physical collisions, compression, etc., avoiding deformation, short circuits, and other malfunctions caused by external forces, thereby extending the service life of the battery cell 1. On the other hand, the casing 5 also plays a certain role in isolation, preventing external dust, moisture, and other impurities from entering the battery cell 1, reducing the problem of battery performance degradation or even damage caused by impurities, and ensuring that the battery cell 1 can work normally in a stable and reliable environment.

[0079] The magnetic field cancelling plate 2 is cleverly placed on the outside of the housing 5. By placing the magnetic field cancelling plate 2 on the outside of the housing 5, it will not interfere with the layout and assembly of the battery cell 1 inside the housing 5, ensuring that the battery cell 1 can be installed compactly and reasonably in a limited space, which is conducive to improving the energy density of the battery.

[0080] From the perspective of achieving magnetic field cancellation, the magnetic field cancelling plate 2, even when placed outside the casing 5, can still fulfill its intended function. When the battery cell 1 is powered on, it generates a magnetic field around it. The magnetic field generated by the extra length of the negative electrode 12 may spill out of the battery, interfering with surrounding electronic devices. However, regardless of whether the magnetic field cancelling plate 2 is connected to the positive electrode 11 or the negative electrode 12, it can generate a magnetic field in the opposite direction to the magnetic field of the extra length of the negative electrode 12 after being powered on. Because the magnetic field cancelling plate 2 is located outside the casing 5, the cancelling magnetic field it generates can act more directly and effectively on the potentially spilling magnetic field area, thereby more accurately weakening and canceling these spilling magnetic fields, greatly reducing the magnetic field interference of the battery to the surrounding environment.

[0081] Furthermore, placing the magnetic field cancelling plate 2 on the outside of the casing 5 offers certain technological advantages. During battery manufacturing, this arrangement allows for relatively independent installation and connection of the magnetic field cancelling plate 2, avoiding complex overlaps and interference with processes such as the encapsulation of the battery cell 1 inside the casing 5. This simplifies the production process, improves efficiency, and reduces costs. Simultaneously, it facilitates subsequent inspection, maintenance, and replacement of the magnetic field cancelling plate 2. If damage or performance degradation is detected, it can be addressed more easily without requiring large-scale disassembly of the entire battery, reducing maintenance and time costs.

[0082] In summary, the battery in this embodiment of the present invention, through its ingenious layout design of placing the battery cell 1 inside the housing 5 and the magnetic field cancelling plate 2 outside the housing 5, demonstrates significant technical advantages in terms of protecting the battery cell 1, achieving efficient magnetic field cancellation, simplifying the production process, and facilitating maintenance.

[0083] In one embodiment of this invention, the battery cell 1 further includes a separator;

[0084] Specifically, the construction process of cell 1 involves stacking the negative electrode 12, separator, positive electrode 11, and another separator layer in sequence. The negative electrode 12, as the electrode from which electrons flow out of the battery, participates in electrochemical reactions during charging and discharging, releasing or storing electrons. The positive electrode 11, as the electrode from which electrons flow in, also plays a crucial role in the electrochemical reaction. The separator acts as a safety barrier between the two.

[0085] The separator possesses unique physical and chemical properties. It is typically made of polymer materials and has a porous structure. This porous structure allows lithium ions to pass freely during battery charging and discharging, facilitating ion conduction between the positive and negative electrodes and ensuring normal battery operation. Simultaneously, the separator effectively prevents the direct passage of electrons, preventing short circuits between the positive and negative electrode plates 11 and 12. If the positive and negative electrodes directly contact and short-circuit, a large current will surge through the battery, generating significant heat and potentially leading to overheating, fire, or even explosion—serious safety accidents. Therefore, the separator plays an indispensable role in ensuring safe battery operation.

[0086] After the negative electrode 12, separator, positive electrode 11, and separator are stacked sequentially, this stacked structure is wound to form a wound structure. The wound structure design offers several advantages. From a space utilization perspective, the wound structure maximizes the area of ​​the electrode sheets within a limited space, thereby increasing the battery capacity. This is because a larger electrode sheet area allows for the participation of more substances in the electrochemical reaction, resulting in the storage and release of more electricity. From a manufacturing process perspective, the wound structure is relatively simple, facilitating large-scale automated production, which helps improve production efficiency and reduce production costs. Furthermore, the wound structure better adapts to various complex environmental conditions during battery use, exhibiting flexibility and impact resistance, reducing damage to the internal structure caused by external vibrations or collisions, and improving battery reliability and lifespan.

[0087] In one specific embodiment of this example, the magnetic field cancelling sheet 2 is made of a conductive material with carefully selected resistivity that is less than that of the positive electrode 11 and the negative electrode 12. This characteristic plays a key role in enhancing the magnetic field cancelling effect.

[0088] From the perspective of the principle of magnetic field generation, when an electric current passes through a conductor, a magnetic field is generated around the conductor. The strength of the magnetic field is closely related to the magnitude of the current and the characteristics of the conductor. According to Ampere's circuital law and other related electromagnetic theories, under the same current conditions, the lower the resistivity of the conductor, the less resistance is encountered to the directional movement of electrons inside it, allowing electrons to flow more smoothly and thus making the current distribution more uniform.

[0089] As for the magnetic field cancelling plate 2, because it is made of a conductive material with a resistivity lower than that of the positive electrode 11 and the negative electrode 12, when the battery cell 1 is energized, a more stable and stronger current can be formed in the magnetic field cancelling plate 2 under the same applied voltage and circuit environment. This is because the low resistivity material reduces the energy loss during current transmission, allowing more electrical energy to be converted into current, thereby generating a stronger magnetic field around the magnetic field cancelling plate 2.

[0090] Inside the battery, the extra length of the negative electrode 12 generates a magnetic field in a certain direction due to the current flowing through it. If this magnetic field is not effectively canceled out, it may interfere with the battery's performance and surrounding electronic devices. The magnetic field generated by the magnetic field cancelling plate 2 is in the opposite direction to the magnetic field generated by the extra length of the negative electrode 12. By using a low-resistivity conductive material, the magnetic field cancelling plate 2 can generate a sufficiently strong magnetic field, thereby more effectively canceling out the magnetic field generated by the extra length of the negative electrode 12.

[0091] Furthermore, the low resistivity of the conductive material also provides excellent conductivity stability and durability. During long-term battery use, it ensures that the magnetic field cancelling plate 2 maintains a stable current flow and magnetic field generation, without any decrease in the magnetic field cancelling effect due to material aging, resistance changes, or other factors. This provides a reliable guarantee for the stable operation of the battery in various complex working environments, extends battery life, and improves the overall performance and reliability of the battery.

[0092] In summary, in this embodiment, the magnetic field cancelling plate 2 is made of a conductive material with a resistivity lower than that of the positive electrode plate 11 and the negative electrode plate 12. By enhancing the magnetic field strength it generates, it achieves a more effective magnetic field cancellation effect, while also possessing good conductivity stability and durability.

[0093] In one specific embodiment of this example, the surface of the magnetic field cancelling sheet 2 is coated with an insulating layer. This design detail plays a crucial role in ensuring the safe operation of the battery and preventing short circuits.

[0094] From the perspective of preventing short circuits, the inside of a battery is a complex electrochemical environment in which the positive electrode 11, negative electrode 12, and magnetic field cancelling plate 2 are all located, and are relatively close to each other. During the charging and discharging process, current flows between the electrode plates, accompanied by changes in the electric and magnetic fields. If the surface of the magnetic field cancelling plate 2 is not protected by an insulating layer, because it is made of conductive material, it may come into direct contact with the positive electrode 11 or negative electrode 12 when the battery is subjected to vibration, pressure, or minor deviations in the manufacturing process. Once this direct contact occurs, it is equivalent to forming a low-resistance conductive path between the positive and negative electrodes, thereby causing a short circuit. The insulating layer coated on the surface of the magnetic field cancelling plate 2 acts like a strong barrier, effectively preventing direct electrical contact between the magnetic field cancelling plate 2 and the positive and negative electrodes, fundamentally avoiding short circuits and providing reliable protection for the safe operation of the battery.

[0095] From another perspective of improving safety, the insulating layer also possesses chemical corrosion resistance. The electrolyte inside the battery typically has a certain degree of chemical activity, which may corrode metallic materials. As a conductive metal material, the magnetic field cancelling sheet 2 is easily corroded by the electrolyte environment when exposed for a long time, leading to surface oxidation and deterioration, which in turn affects its conductivity and magnetic field cancelling effect. The insulating layer can isolate the magnetic field cancelling sheet 2 from direct contact with the electrolyte, slowing down the rate of chemical corrosion, extending the service life of the magnetic field cancelling sheet 2, and ensuring that it can stably perform its magnetic field cancelling function throughout the entire battery life. Furthermore, the insulating layer can prevent changes in surface resistance caused by oxidation, dust adsorption, and other impurities on the surface of the magnetic field cancelling sheet 2. If the surface resistance of the magnetic field cancelling sheet 2 changes, it may affect its internal current distribution and magnetic field generation, thereby reducing the magnetic field cancelling effect. The presence of the insulating layer keeps the surface of the magnetic field cancelling sheet 2 clean and stable, ensuring that its performance is not affected by external environmental factors.

[0096] In summary, the design of coating the surface of the magnetic field cancelling sheet 2 with an insulating layer in this embodiment significantly improves the safety and reliability of the battery by preventing short circuits, resisting chemical corrosion, and maintaining stable surface performance.

[0097] Although this application uses terms such as battery cell and magnetic field cancelling sheet frequently, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

[0098] Example 2

[0099] This utility model provides an electronic device, including the battery provided in Embodiment 1 above.

[0100] It should be noted that this battery has broad compatibility and can be adapted to different types of electronic devices, including but not limited to smartphones, tablets, laptops, and smart wearable devices.

[0101] The electronic device provided in this embodiment of the present invention, by using the battery in Embodiment 1, can ensure the stable operation of the electronic device, bringing users a better user experience, and also providing electronic device manufacturers with a more competitive product solution.

[0102] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A battery, characterized by, Includes a battery cell (1) and a magnetic field cancelling sheet (2); wherein, The battery cell (1) has a wound structure, including a positive electrode (11) and a negative electrode (12), wherein the length of the negative electrode (12) is greater than the length of the positive electrode (11); The magnetic field cancelling plate (2) is disposed on the top and side surfaces of the battery cell (1) and is connected to the negative electrode plate (12) or the positive electrode plate (11); When the battery cell (1) is powered on, the magnetic field generated by the magnetic field cancelling plate (2) is opposite in direction to the magnetic field generated by the extra length of the negative electrode plate (12), so as to achieve magnetic field cancellation.

2. The battery of claim 1, wherein, When the magnetic field cancelling plate (2) is connected to the positive electrode plate (11), the magnetic field cancelling plate (2) extends from the connection point along the winding direction of the negative electrode plate (12) so that after the battery cell (1) is energized, the magnetic field generated by the magnetic field cancelling plate (2) is opposite to the magnetic field generated by the extra length of the negative electrode plate (12). Alternatively, when the magnetic field cancelling plate (2) is connected to the negative electrode plate (12), the magnetic field cancelling plate (2) extends from the connection point in the opposite direction to the winding direction of the negative electrode plate (12), so that after the battery cell (1) is energized, the magnetic field generated by the magnetic field cancelling plate (2) is opposite to the magnetic field generated by the extra length portion of the negative electrode plate (12).

3. The battery according to claim 1 or 2, characterized in that, The magnetic field cancelling plate (2) includes a first cancelling section (21) and a second cancelling section (22); The first offset section (21) is disposed on the top surface of the cell (1) and is connected to the negative electrode (12) or the positive electrode (11); The second offset section (22) is disposed on the side of the cell (1) and is connected to the first offset section (21).

4. The battery of claim 3, wherein, When the magnetic field cancelling plate (2) is connected to the positive electrode plate (11), the magnetic field cancelling plate (2) is provided with a positive electrode pad (3). Alternatively, when the magnetic field cancelling plate (2) is connected to the negative electrode plate (12), the magnetic field cancelling plate (2) is provided with a negative electrode pad (4).

5. The battery of claim 4, wherein, When the first offset segment (21) is connected to the positive electrode plate (11), the end of the second offset segment (22) is bent to serve as the positive electrode pad (3). When the first offset segment (21) is connected to the negative electrode plate (12), the end of the second offset segment (22) is bent to serve as the negative electrode pad (4).

6. The battery of claim 1, wherein, It also includes the housing (5); The battery cell (1) is disposed inside the housing (5); The magnetic field cancelling plate (2) is disposed on the outside of the housing (5).

7. The battery of claim 1, wherein, The battery cell (1) also includes a separator; The negative electrode (12), the separator, the positive electrode (11), and the separator are stacked in sequence and then wound to form a wound structure.

8. The battery according to claim 1 or 2, characterized by The magnetic field cancelling plate (2) is made of a conductive material, and the resistivity of the conductive material is less than that of the positive electrode plate (11) and the negative electrode plate (12).

9. The battery of claim 1, wherein, The surface of the magnetic field cancelling sheet (2) is coated with an insulating layer.

10. An electronic device, comprising: Includes the battery as described in any one of claims 1-9.

Images