Circuit board and battery assembly

Abstract

The utility model discloses a circuit board and a battery assembly, the circuit board comprises a substrate used for electrically connecting a battery cell and a connecting plate connected to the end part of the substrate along the length direction, the substrate is provided with an electric connecting part, and the electric connecting part is used for electrically connecting a tab. The connecting plate is provided with a bending part which can be bent towards the substrate, the bending part is provided with a magnetic piece, and when the connecting plate is bent towards the substrate, the magnetic piece can be adsorbed by the magnetic piece to fix the bending part and the substrate, so that the connecting plate can be separably fixed on the battery cell, the circuit board is effectively prevented from rebounding and shifting after being bent, and the service life of the circuit board is prolonged. Therefore, the cell can be conveniently assembled on the mobile phone. According to the invention, the operation step of removing the fixed gummed paper after the battery cell is installed on the mobile phone is omitted, the production efficiency of the product is effectively improved, the risk that the connection between the circuit board and the battery cell is damaged in the process of removing the fixed gummed paper in the related technology is also avoided, and the yield of the product is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a circuit board and a battery assembly. Background Art

[0002] Currently, mobile phone battery circuit boards utilize a flexible, flexing design. After soldering the circuit board to the battery cell, the flexible board is bent to the battery head, securing it to the phone's mainboard. This bending can cause springback and deformation, potentially preventing the battery from properly securing to the mainboard during assembly. Currently, additional adhesive tape is used to secure the flexible board to prevent springback and displacement after bending. However, this adhesive tape is not required after the phone is assembled and must be removed. However, once the battery is assembled in the phone, the adhesive tape is difficult to remove due to the phone's structural limitations, severely impacting phone production efficiency. Utility Model Content

[0003] The main purpose of the utility model is to provide a circuit board and a battery assembly, aiming to solve the technical problem of how to prevent the flexible board from rebounding and shifting after bending, thereby improving production efficiency.

[0004] To achieve the above-mentioned object, the present invention provides a circuit board suitable for a battery cell, wherein the battery cell includes a tab, and the circuit board includes:

[0005] A substrate is provided with an electrical connection portion, the electrical connection portion is used to electrically connect the tab, and a connecting plate is provided at an end portion of the substrate along the length direction;

[0006] The connecting plate has a bending portion that can be bent toward the substrate. A magnetic component is provided on the bending portion. When the connecting plate is bent toward the substrate, the magnetic component can be adsorbed by the magnetic attraction component to fix the bending portion and the substrate.

[0007] In some embodiments, the magnetic member is a steel sheet or a permanent magnet.

[0008] In some embodiments, the magnetic member is connected to an end of the connecting plate away from the base plate.

[0009] In some embodiments, a connecting plate is provided at each of the two ends of the substrate along the length direction, and a magnetic member is provided at a bent portion of each connecting plate.

[0010] In some embodiments, the connecting plate has an extension portion extending in the width direction, and a connector is provided on one side of the extension portion in the thickness direction, and a reinforcing sheet is provided on the other side.

[0011] A second aspect of the present invention further provides a battery assembly, comprising:

[0012] The circuit board according to any one of the above embodiments;

[0013] A battery cell, one end of which extends a tab, the tab being electrically connected to the circuit board; and

[0014] A magnetic attraction component is connected to the battery core, and the magnetic attraction component is configured to be able to absorb the magnetic component.

[0015] In some embodiments, the magnetic attraction member is a magnetic tape, and the magnetic tape is configured to be attached to the battery core and / or the circuit board.

[0016] In some embodiments, a magnetic attraction region is provided on one side of the substrate of the circuit board along the thickness direction, and at least a portion of the magnetic attraction member is attached to the magnetic attraction region.

[0017] In some embodiments, the magnetic attraction region and the electrical connection portion are located on one side of the substrate along the thickness direction, and the magnetic attraction region and the electrical connection portion are staggered;

[0018] Alternatively, the magnetic attraction region and the electrical connection portion are respectively located on two sides of the substrate along the thickness direction.

[0019] In some embodiments, there are multiple electrical connection parts, and the multiple electrical connection parts are arranged at intervals, and at least one electrical connection part is respectively arranged on both sides of the magnetic attraction area along the length direction.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] In the technical solution of the present invention, the circuit board includes a substrate for electrically connecting the battery cell and a connecting plate connected to the end of the substrate along the length direction. The substrate is provided with an electrical connection portion, which is used to electrically connect the electrode lug. The connecting plate has a bending portion that can be bent toward the substrate, and a magnetic member is provided on the bending portion. When the connecting plate is bent toward the substrate, the magnetic member can be adsorbed by the magnetic member to fix the bending portion and the substrate, so that the connecting plate can be detachably fixed to the battery cell, effectively preventing the circuit board from rebounding or shifting after bending, thereby facilitating the assembly of the battery cell into the mobile phone. In addition, compared with the related art that uses fixing tape to stick the connecting plate to the battery cell, the present application uses the combination of magnetic members and magnetic members to enable the connecting plate to be detachably fixed to the battery cell, eliminating the step of removing the fixing tape after the battery cell is installed in the mobile phone, effectively improving the production efficiency of the product. In addition, it also avoids the risk of the connection between the circuit board and the battery cell being damaged during the removal of the fixing tape in the related art, thereby improving the product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 Schematic diagram of the structure of a battery assembly in one embodiment of the present invention; wherein the magnetic attraction member adopts a magnetic tape, and the magnetic tape is configured to fix the substrate to the battery cell;

[0024] Figure 2 This is a schematic structural diagram of a battery assembly in another embodiment of the present invention;

[0025] Figure 3 This is a schematic structural diagram of a circuit board in a first perspective in one embodiment of the present invention;

[0026] Figure 4 This is a schematic structural diagram of a circuit board in a second perspective in one embodiment of the present invention;

[0027] Figure 5 The figure is a schematic diagram of a structure in which a circuit board is fixed to a battery cell by fixing tape in the related art.

[0028] Description of Figure Numbers:

[0029] Battery assembly 10;

[0030] Circuit board 100;

[0031] Substrate 110; Electrical connection portion 111;

[0032] Connecting plate 120; Connector 121;

[0033] Magnetic member 130;

[0034] Reinforcement sheet 140;

[0035] Battery cell 200; Tab 210;

[0036] Magnetic element 300;

[0037] Fixing tape 20.

[0038] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] See also Figures 1 to 4The utility model provides a circuit board 100, which is suitable for connecting a battery cell 200 and an external device. The battery cell 200 includes a tab 210, and the external device includes but is not limited to a mobile phone. The circuit board 100 includes a substrate 110 and a connecting plate 120, wherein the substrate 110 is provided with an electrical connection portion 111, and the electrical connection portion 111 is used to electrically connect the tab 210, that is, the substrate 110 is suitable for connecting the battery cell 200 and electrically connecting the electrical connection portion 111 to the tab 210, and the connection method of the electrical connection portion 111 to the tab 210 includes but is not limited to welding. Specifically, the tab 210 includes a positive electrode and a negative electrode arranged at intervals, and the electrical connection portion 111 includes a positive electrode connection portion and a negative electrode connection portion arranged at intervals. The positive electrode of the tab 210 can be connected to the positive electrode connection portion, and the negative electrode can be connected to the negative electrode connection portion. A connecting plate 120 is provided at the end of the substrate 110 along the length direction. The connecting plate 120 is integrally connected to the substrate 110, and the connecting plate 120 is configured to be able to bend relative to the substrate 110 in a direction close to the substrate 110. Specifically, the connecting plate 120 has a bending portion that can be bent toward the substrate 110, and a magnetic member 130 is provided on the bending portion. When the connecting plate 120 is bent toward the substrate 110, the magnetic member 130 can be adsorbed by the magnetic member 300 to fix the bending portion and the substrate 110. In some embodiments, the connecting plate 120 includes a connector 121 electrically connected to the electrical connection portion 111, and the connector 121 is configured to be able to electrically connect to the mobile phone. The magnetic member 130 is connected to the connecting plate 120, and the magnetic member 130 is configured to be able to be adsorbed on the magnetic member 300 so that the position of the connecting plate 120 is fixed relative to the position of the substrate 110. The magnetic member 300 includes but is not limited to a permanent magnet. When the circuit board 100 is connected to the battery cell 200 through the substrate 110, the connecting plate 120 is bent relative to the substrate 110 so that the magnetic part 130 is adsorbed on the magnetic part 300 (the magnetic part 300 can be set on the circuit board 100 or the battery cell 200). The connecting plate 120 can then be compactly attached to the magnetic part 300, so that the circuit board 100 and the battery cell 200 form a whole and are easy to assemble in a mobile phone, thereby avoiding the connection plate 120 that is not directly connected to the battery cell 200 from shaking, bending or even folding during the assembly of the battery cell 200 in the mobile phone, thereby affecting the smoothness of the assembly of the battery cell 200 in the mobile phone. In addition, the connecting plate 120 is adsorbed on the magnetic part 300 through the magnetic part 130, which can also prevent the connecting plate 120 from rebounding after bending relative to the substrate 110, thereby causing the connector 121 to shift relative to its connection position in the mobile phone.

[0041] It should be noted that the connector 121 is located on the connecting plate 120, and the design that the connecting plate 120 can be flexibly bent relative to the substrate 110 effectively reduces the difficulty of designing and manufacturing the circuit board 100. Specifically, the mobile phone includes a control motherboard, and the motherboard is provided with a snap-on portion that can be electrically connected to the connector 121. The substrate 110 is electrically connected to the pole ear 210, and after the connecting plate 120 is adsorbed on the magnetic component 300 under the action of the magnetic component 130, the battery cell 200 is assembled to the mobile phone. In order to improve the connection stability between the connector 121 and the snap-on portion, the magnetic component 130 is separated from the magnetic component 300, and the bending position of the extension portion relative to the substrate is adjusted, so that the connector 121 can be accurately aligned with the snap-on portion as the connecting plate 120 moves. After the connector 121 is connected to the snap-fit ​​part, the magnetic part 130 can be adsorbed on the magnetic part 300 again (at this time, the adsorption position of the magnetic part 130 on the magnetic part 300 can be different from the adsorption position of the magnetic part 130 on the magnetic part 300 before the battery cell 200 is assembled in the mobile phone), thereby avoiding the situation where the connection reliability of the connector 121 with the snap-fit ​​part is reduced due to the action of the rebound force or even the connector 121 is separated from the snap-fit ​​part.

[0042] In some embodiments, the magnetic part 130 can be made of a metal material that can be adsorbed by the magnetic part 300, including but not limited to steel sheets (including but not limited to SUS304), iron sheets, structures with nickel (or cobalt) materials, etc. In other embodiments, the magnetic part 130 can also be made of a permanent magnet. For ease of description, the following description will take the example of the magnetic part 130 being made of a steel sheet. The steel sheet can be arranged on the side of the extension portion facing away from the magnetic part 300. The arrangement of the steel sheet can fix the connecting plate 120 as the steel sheet is adsorbed on the magnetic part 300. At the same time, the steel sheet can also increase the structural strength of the extension portion and improve the service life of the circuit board 100.

[0043] The magnetic member 130 can be disposed at any position of the extension portion. Figure 3 and Figure 4 The magnetic member 130 is connected to the end of the connecting plate 120 away from the substrate 110. Therefore, when the connecting plate 120 is adsorbed on the magnetic member 300 along with the magnetic member 130, during the process of transporting or assembling the battery cell 200 in the mobile phone, the end of the connecting plate 120 away from the substrate 110 can always be in contact with the magnetic member 300, thereby avoiding the end of the connecting plate 120 away from the substrate 110 from warping and affecting the transportation or assembly of the battery cell 200.

[0044] See also Figure 1 、 Figure 3 and Figure 4A connecting plate 120 is provided at each end of the substrate 110 along the length direction, and a magnetic member 130 is provided at the bent portion of each connecting plate 120. Each connecting plate 120 is provided with a connector 121, and each connector 121 can be located on the same side of the substrate 110 or on different sides of the substrate 110. The connecting plate 120 has an extension extending in the width direction, and the connector 121 is provided on one side of the extension in the thickness direction, and a reinforcing sheet 140 is provided on the other side. In some embodiments, the connecting plate 120 is provided with an extension on both sides of the width direction, and each extension is provided with a connector 121 on one side in the thickness direction and a reinforcing sheet 140 on the other side.

[0045] To enhance the structural strength of connector 121 and the bent portion, in some embodiments, a reinforcing sheet 140 is provided on connector 121 and the bent portion. Specifically, reinforcing sheet 140 is located on the side of connector 121 facing away from the snap-fit ​​portion. The provision of reinforcing sheet 140 enhances the structural strength of connector 121 and the bent portion, thereby improving the ease of connection between connector 121 and the snap-fit ​​portion, and between the bent portion and substrate 110. Materials used for reinforcing sheet 140 include, but are not limited to, steel sheets (including, but not limited to, SUS304).

[0046] In some embodiments, the substrate 110 includes a magnetic component configured to attract a magnetic member 130. The material used for the magnetic component includes, but is not limited to, a permanent magnet. The magnetic component is disposed on the circuit board 100, which reduces the difficulty of designing and manufacturing the battery cell 200. Furthermore, the magnetic member 130 adsorbed on the magnetic component can secure the connecting plate 120 of the circuit board 100 to the substrate 110, thereby enabling the circuit board 100 to be compactly stored. This makes the assembly of the battery cell 200 into the mobile phone smoother, reduces the scrap rate of the battery cell 200 during transportation, and reduces the scrap rate during the production of the mobile phone. In some embodiments, the two magnetic members 130 can be adsorbed on the same side of the magnetic component. In other embodiments, the two magnetic members 130 are adsorbed on opposite sides of the magnetic component. Thus, the projections formed by each magnetic member 130 on the magnetic component can overlap, thereby reducing the size of the magnetic component on the circuit board 100.

[0047] See also Figure 3 and Figure 4 , the two connectors 121 are located on the same side of the substrate 110, and the electrical connection portion 111 and the connector 121 can be located on different sides of the substrate 110. In some embodiments, for ease of description, the substrate 110 is defined as having a first side and a second side that are adjacently disposed, the electrical connection portion 111 is located on the first side of the substrate 110, and the connector 121 is located on the second side.

[0048] The second aspect of the present invention further provides a battery assembly 10, see Figure 1 and Figure 2 The battery assembly 10 includes a battery cell 200, a magnetic component 300, and the circuit board 100 described in any of the above embodiments, wherein the battery cell 200 includes a tab 210, and the tab 210 can be electrically connected to the circuit board 100. Specifically, the tab 210 can be welded to the electrical connection portion 111. In some embodiments, the magnetic component 300 is disposed at one end of the battery cell 200 close to the tab 210. Specifically, the magnetic component 300 is disposed on a side adjacent to the tab 210. The magnetic component 130 can be adsorbed on the magnetic component 300, so that the connecting plate 120 of the circuit board 100 can be fixed to the battery cell 200. During the assembly of the battery cell 200 into the mobile phone, compared to the related art solution that does not employ other methods to fix the circuit board except at the connection point with the tab 210, in this solution, by fixing the circuit board's connecting plate 120 to the battery cell 200, the smooth operation of the assembly of the battery cell 200 into the mobile phone is facilitated, and the probability of the circuit board 100 being damaged during the assembly of the battery cell 200 into the mobile phone is reduced. In addition, in this application, fixing the connecting plate 120 of the circuit board 100 to the battery cell 200 also reduces the probability of the circuit board 100 being torn or separated from the tab 210 during the transportation of the battery cell 200, thereby reducing the scrap rate and further reducing production costs. In addition, in the related art, the circuit board is fixed to the battery cell 200 by using a fixing tape 20. Although this can facilitate the assembly of the battery cell 200 to the mobile phone, the circuit board needs to be electrically connected to the control motherboard of the mobile phone after the battery cell 200 is assembled to the mobile phone. That is, the circuit board needs to be electrically connected to the buckle part set on the control motherboard, and the setting position of the buckle part on the mobile phone is relatively fixed and cannot be changed. In order to accurately connect the circuit board to the buckle part, it is usually necessary to make the part of the circuit cloth connected to the buckle part move relative to the buckle part (battery cell 200) to facilitate the alignment of the circuit board and the buckle part. Therefore, it is necessary to remove the fixing tape 20 attached to the circuit board and the battery cell 200.

[0049] However, the applicant has found that in the process of removing the fixing tape 20, after the fixing tape 20 is separated from the battery cell 200, sticky substances are likely to remain on the surface of the battery cell 200, affecting the subsequent production process of the mobile phone. In addition, since the circuit board is relatively thin, the circuit board is likely to be torn during the process of removing the fixing tape 20 from the circuit board, and may even cause the connection between the circuit board and the tab 210 to be unreliable or even cause the electrical connection between the circuit board and the tab 210 to fail, which is very detrimental to improving product quality and production efficiency. In the present application, by providing a magnetic part 130 on the circuit board 100 and a magnetic attraction part 300 on the battery cell 200, the connecting plate 120 of the circuit board 100 can be adsorbed on the magnetic attraction part 300 through the magnetic part 130, thereby facilitating the transportation of the battery cell 200 and the operation of assembling the battery cell 200 in the mobile phone. Furthermore, after the battery cell 200 is assembled in the mobile phone, compared to the related art method of using fixing tape 20 to fix the circuit board, the present application omits the step of removing the fixing tape 20. Instead, the magnetic member 130 only needs to be separated from the magnetic member 300 to facilitate alignment and electrical connection between the connector 121 and the buckle portion, effectively improving production efficiency while reducing the scrap rate of the product. After the connector 121 is electrically connected to the buckle portion, the magnetic member 130 can be reattached to the magnetic member 300 to ensure the stability of the electrical connection between the connector 121 and the buckle portion, thereby reducing the probability of failure of the electrical connection between the connector 121 and the buckle portion due to shaking or vibration of the connector 121 (or the buckle portion) under external influences, thereby improving the reliability of the product.

[0050] See also Figure 1 , the magnetic attraction member 300 can adopt magnetic tape. Specifically, after the electrical connection portion 111 of the circuit board 100 is electrically connected to the tab 210, the substrate 110 can be fixed to the battery cell 200 by means of magnetic tape, thereby further reducing the probability of failure of the electrical connection between the circuit board 100 and the tab 210. The connecting plate 120 of the circuit board 100 is bent relative to the substrate 110 and adsorbed on the magnetic tape through the magnetic member 130. It can be understood that the magnetic attraction member 300 adopts the form of magnetic tape, which not only provides a magnetic attraction function but also plays a certain insulating and protective role, thereby preventing the risk of short circuit caused by direct contact between the circuit board 100 and the battery cell 200. The use of magnetic tape simplifies the assembly process of the battery component, reduces costs, and improves production efficiency.

[0051] In some embodiments, a magnetic area is provided on one side of the substrate 110 of the circuit board 100 in the thickness direction, and at least a portion of the magnetic component 300 is attached to the magnetic area, thereby ensuring that the magnetic component 300 can be firmly adsorbed on the circuit board 100. Even when the battery assembly is subjected to impact or vibration, the circuit board 100 can be kept stable, thereby avoiding electrical connection failures caused by displacement of the circuit board 100.

[0052] In some embodiments, the magnetic region and electrical connection portion 111 are located on one side of the substrate 110 along the thickness direction, and the magnetic region and electrical connection portion 111 are staggered. This prevents direct pressure from the magnetic element 300 on the electrical connection portion 111, preventing deformation or damage to the electrical connection portion 111 due to the weight of the magnetic element 300, and ensuring the stability of the electrical performance of the circuit board 100. In another embodiment, the magnetic region and electrical connection portion 111 are located on opposite sides of the substrate 110 along the thickness direction, further isolating the potential impact of the magnetic element 300 on the electrical connection portion 111 and improving the structural rationality of the battery assembly.

[0053] It is understood that in some embodiments, the staggered or separated arrangement of the magnetic area and the electrical connection portion 111 can optimize the spatial layout of the circuit board 100 and improve the anti-interference capability of the circuit board 100. In addition, it also facilitates heat dissipation of the circuit board 100, because the magnetic element 300 generally does not generate excessive heat, while the electrical connection portion 111 may generate heat during operation. The separated arrangement helps to disperse the heat source and improve the thermal management performance of the battery assembly.

[0054] In some embodiments, there are multiple electrical connection parts 111, and the multiple electrical connection parts 111 are arranged at intervals. At least one electrical connection part 111 is arranged on both sides of the magnetic attraction area along the length direction, which fully utilizes the space of the circuit board 100 and improves the integration of the circuit board 100. At the same time, it ensures that the adsorption force of the magnetic attraction part 300 is evenly distributed, increases the structural stability of the circuit board 100, and avoids failures that may be caused by local stress concentration.

[0055] It is understood that in some embodiments, the provision of multiple electrical connections 111 enables the circuit board 100 to adapt to different types or specifications of battery cells 200, thereby improving the versatility and compatibility of the battery assembly. At the same time, the electrical connections 111 arranged at intervals can effectively disperse the current, reduce the current density of a single electrical connection 111, extend the service life of the circuit board 100, and reduce the failure rate. The electrical connections 111 are provided on both sides of the magnetic attraction area along the length direction. This layout is beneficial to the thermal balance of the circuit board 100 because the current is distributed among the multiple electrical connections 111, reducing the risk of local overheating.

[0056] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0057] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or", "and / or" or "and / or" appear in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0058] The above are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A circuit board, suitable for a battery cell, wherein the battery cell includes a tab, characterized in that: The circuit board comprises: A substrate is provided with an electrical connection portion, the electrical connection portion is used to electrically connect the tab, and a connecting plate is provided at an end portion of the substrate along the length direction; The connecting plate has a bending portion that can be bent toward the substrate. A magnetic component is provided on the bending portion. When the connecting plate is bent toward the substrate, the magnetic component can be adsorbed by the magnetic attraction component to fix the bending portion and the substrate.

2. The circuit board according to claim 1, wherein: The magnetic part is a steel sheet or a permanent magnet.

3. The circuit board according to claim 1, wherein: The magnetic component is connected to an end of the connecting plate away from the base plate.

4. The circuit board according to claim 1, wherein: A connecting plate is respectively provided at both ends of the base plate along the length direction, and a magnetic component is provided at a bent portion of each connecting plate.

5. The circuit board according to claim 1, wherein: The connecting plate has an extending portion extending in a width direction. A connector is provided on one side of the extending portion in a thickness direction, and a reinforcing sheet is provided on the other side of the extending portion.

6. A battery assembly, characterized in that: include: The circuit board according to any one of claims 1 to 5; A battery cell, one end of which extends a tab, the tab being electrically connected to the circuit board; as well as A magnetic attraction component is connected to the battery core, and the magnetic attraction component is configured to be able to absorb the magnetic component.

7. The battery assembly according to claim 6, wherein: The magnetic attraction member is a magnetic tape, and the magnetic tape is configured to be attached to the battery core and / or the circuit board.

8. The battery assembly according to claim 7, wherein: A magnetic attraction area is provided on one side of the substrate of the circuit board along the thickness direction, and at least a portion of the magnetic attraction member is attached to the magnetic attraction area.

9. The battery assembly according to claim 8, wherein: The magnetic attraction region and the electrical connection portion are located on one side of the substrate in the thickness direction, and the magnetic attraction region and the electrical connection portion are staggered; Alternatively, the magnetic attraction region and the electrical connection portion are respectively located on two sides of the substrate along the thickness direction.

10. The battery assembly according to claim 8, wherein There are a plurality of electrical connection parts, which are arranged at intervals, and at least one electrical connection part is respectively arranged on both sides of the magnetic attraction area along the length direction.

Images