Battery protection structure, battery and electronic equipment

Abstract

The utility model provides a battery protection structure, a battery and electronic equipment. The battery protection structure comprises a protection plate, the protection plate comprises a switching part, the switching part is provided with a first electrode point, a second electrode point and a charging and discharging circuit, the first electrode point is used for being electrically connected with a positive electrode of a battery cell of the battery, and the second electrode point is used for being electrically connected with a negative electrode of the battery cell; the first electrode point and the second electrode point are electrically connected through the charging and discharging circuit. The charging and discharging circuit comprises a protection element, and the protection element is fixed to the switching part and used for limiting the maximum current threshold value of the charging and discharging circuit. Wherein the width of the switching part is matched with the width of the protection element. And under the condition that the length of the battery is not changed, the width of the protection plate is reduced, so that more space can be reserved for the battery cell, and the electric energy reserve in the battery cell under the same occupied space is increased.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery protection structure, a battery and an electronic device. Background Art

[0002] There are more and more types of mobile phone entertainment, and users have higher and higher demands for battery life. However, the space of mobile phones is limited. How to increase the power reserve in the battery cell within the effective space and improve the battery life is an urgent challenge that needs to be overcome at this stage. Therefore, a packaging design scheme is proposed here to maximize the power reserve in the battery cell under the same space, so as to improve the battery life of mobile phones. Utility Model Content

[0003] In order to overcome the problems existing in the related art, this specification provides a battery protection structure, a battery and an electronic device.

[0004] According to the first aspect of the embodiments of this specification, a battery protection structure is provided, which is used to connect to the battery cell of the battery, and the battery protection structure includes: a protection plate, the protection plate includes a transition part, and a first electrode point, a second electrode point and a charge and discharge circuit are arranged on the transition part, the first electrode point is used to electrically connect to the positive pole of the battery cell, the second electrode point is used to electrically connect to the negative pole of the battery cell, and the first electrode point and the second electrode point are electrically connected through the charge and discharge circuit; the charge and discharge circuit includes a protection element, the protection element is fixed to the transition part, and is used to limit the maximum current threshold of the charge and discharge circuit; wherein the width of the transition part is adapted to the width of the protection element. By reducing the width of the transition part to match the width of the protection element, the width of the protection plate can be shortened when the length of the battery remains unchanged, so that the length of the battery cell can be increased, and the energy storage in the battery cell under the same occupied space can be increased.

[0005] Further, the protection board includes a carrier, the carrier is mounted on the adapter of the protection board, the protection element is mounted on the carrier, and the protection element is electrically connected to the charge and discharge circuit through the carrier. The protection element is mounted on the carrier, and the carrier is electrically connected to the charge and discharge circuit, so that when the adapter is laid out, it is no longer necessary to leave enough space in the width direction for the protection element to dissipate heat, and to prevent the protection element from being damaged by impact. Through the above arrangement, only electrical contacts that are electrically connected to the carrier need to be reserved on the adapter, which reduces the originally vacant redundant space, shortens the battery length occupied by the protection board, saves the battery space used by the protection board, increases the proportion of the battery cell, and thus increases the electric energy reserve in the battery cell. In addition, the protection element can be first installed on the carrier, and then directly connected in series with the charge and discharge circuit through the carrier. Specifically, the protection element can be welded on the carrier, and there is a wiring circuit on the carrier, and the protection element is electrically connected to the wiring circuit. The wiring circuit is provided with contacts on the back of the carrier, and the electrical connection between the contacts and the discharge circuit is achieved by fixing the carrier on the adapter of the carrier. The process difficulty is reduced, the maintenance difficulty is simplified, and the manufacturing and maintenance costs are reduced.

[0006] Furthermore, the battery protection structure also includes a protective layer, which is located above the carrier, and the protective layer covers the end of the protection element away from the carrier, and covers the surrounding side of the protection element; the toughness of the protective layer is greater than the toughness of the protection element. The protective layer covers the protection element, which can effectively protect the protection element on the carrier and the side of the carrier on which the protection element is installed, avoiding damage to the carrier due to collision outside the protective layer, protecting the protection element on the carrier from being exposed to the air, avoiding or reducing the damage to the protection element caused by collision of other components with the protection element due to vibration and other reasons, improving the stability of the protection element, ensuring that the function of the protection element is not affected, and improving the safety of the battery.

[0007] Furthermore, the peripheral edge of the protective layer is flush with the peripheral edge of the carrier. The peripheral edge of the protective layer does not exceed the peripheral edge of the carrier, which can ensure that the width of the used space is compatible with the adapter, and no additional space is occupied, thereby ensuring the technical effect of shortening the width of the protective plate; and the peripheral edge of the protective layer is not inside the peripheral edge of the carrier, which can ensure that all the protective elements on the carrier are protected, thereby improving the protection effect of the protective elements.

[0008] Furthermore, the battery protection structure also includes a transfer sheet, one end of which is used to be electrically connected to the negative electrode of the battery cell, and the other end is electrically connected to the first electrode point of the transfer part; the transfer sheet includes a substrate and a laminate, and the substrate is connected to the first electrode point; the laminate and the substrate are stacked in the thickness direction. After stacking, the thickness of the transfer sheet increases, and the substrate and the laminate are stacked to form a parallel circuit to reduce the total impedance of the transfer sheet, which has the effect of reducing heat generation, and the double-layer design increases the surface area to enhance the heat dissipation capacity.

[0009] Furthermore, the ratio of the thickness of the laminate to the thickness of the substrate is greater than or equal to 0.5 and less than or equal to 1.5. If the thickness of the laminate is too small, the effect of reducing impedance will be too weak, and if the thickness of the laminate is too large, it will not be able to be installed in the accommodation space.

[0010] Further, the battery protection plate includes a first surface, and the first electrode point is located on the first surface; the substrate includes a main body, a bending part and a connecting part; the bending part extends along the thickness direction of the battery protection plate and connects the main body and the connecting part; the connecting part abuts against the first surface and is electrically connected to the first electrode point; the main body is away from the first surface relative to the connecting part, and is spaced from the connecting part to form a receiving space; at least part of the stack is located in the receiving space. Since the adapter includes two connecting parts, the current flowing into the adapter from the battery cell will flow through the main body to the two bending parts corresponding to the two connecting parts in the adapter, and then flow into the two first electrode points of the protection plate through the two connecting parts, so as to realize the shunting of large current, which not only reduces the heating power by reducing the branch current, but also effectively improves the battery use threshold, protects the battery circuit, prolongs the battery life, and ensures the safety performance of the electronic device. By setting the stack position in this way, by setting the stack 22 in the space formed by the substrate 21, it is avoided to be set outside the receiving space 4, which can improve the space utilization rate and better reduce the total thickness of the adapter and the protection plate.

[0011] Furthermore, along the thickness direction of the adapter, the orthographic projection area of ​​the stack is less than or equal to the orthographic projection area of ​​the substrate; the ratio of the orthographic projection area of ​​the stack to the orthographic projection area of ​​the substrate is greater than or equal to 0.7 and less than 1. The stack area is designed to be smaller than the substrate area to meet the installation process requirements of the stack, so that the stack can be correctly installed on the substrate. The ratio of the orthographic projection area of ​​the stack to the orthographic projection area of ​​the substrate is less than 1, so that the stack can be normally installed on the substrate, and the ratio of the orthographic projection area of ​​the stack to the orthographic projection area of ​​the substrate is greater than or equal to 0.7, which can effectively improve heat dissipation while reducing total impedance.

[0012] Furthermore, the difference between the width of the adapter and the width of the carrier is less than 5 mm. The best solution is that the width of the adapter is nearly the same as the width of the carrier, so that the width occupied by the protection board can be compressed to the greatest extent, so as to allocate more space to the battery cell to increase the power reserve in the battery cell.

[0013] According to a second aspect of the embodiments of this specification, there is provided an electronic device, comprising the battery protection structure as described above.

[0014] The technical solutions provided by the embodiments of this specification may have the following beneficial effects:

[0015] When the length of the battery remains unchanged, shortening the width of the protection plate can reserve more space for the battery cell, thereby increasing the length of the battery cell and increasing the energy reserve in the battery cell under the same occupied space. This improves the heat dissipation performance and anti-collision ability of the battery and protects the battery.

[0016] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and, together with the description, serve to explain the principles of the specification.

[0018] Figure 1 It is a structural diagram of a battery protection structure shown in this specification according to an exemplary embodiment.

[0019] Figure 2 It is a structural diagram of a protection plate according to an exemplary embodiment of the present specification.

[0020] Figure 3 It is a structural diagram of a carrier board according to an exemplary embodiment of the present specification.

[0021] Figure 4 It is a structural diagram of a transfer sheet according to an exemplary embodiment of the present specification.

[0022] Figure 5 1 is a side cross-sectional view of a transfer sheet according to an exemplary embodiment of the present specification.

[0023] In the figure: 1. Protection plate, 11. Adapter, 111. First electrode point, 112. Second electrode point, 113. Protection element, 114. Carrier, 115. Protection layer, 116. First surface, 2. Adapter, 21. Base sheet, 211. Main body, 212, Bending portion, 213. Connecting portion, 22. Lamination, 3. Battery cell, 4. Accommodating space. DETAILED DESCRIPTION

[0024] Next, the embodiments of this specification are described in detail.

[0025] On the one hand, this specification provides a battery protection structure, such as Figure 1-Figure 2 As shown, Figure 1 is a structural diagram of a battery protection structure shown in this specification according to an exemplary embodiment, Figure 2 It is a structural diagram of a protection board shown in this specification according to an exemplary embodiment. The battery protection structure of this scheme is used to connect with the battery cell, including a protection board 1 and a adapter plate 2, and the battery cell 3 is electrically connected to the protection board 1 and the adapter plate 2 respectively.

[0026] The protection board 1 includes a transition part 11, on which a first electrode point 111, a second electrode point 112 and a charge and discharge circuit are arranged, wherein the first electrode point 111 is used to be electrically connected to the positive pole of the battery cell 3, and the second electrode point 112 is used to be electrically connected to the negative pole of the battery cell 3, and the first electrode point 111 and the second electrode point 112 are electrically connected through the charge and discharge circuit; the charge and discharge circuit includes a protection element 113, which is fixed to the transition part 11 and is used to limit the maximum current threshold of the charge and discharge circuit; wherein the width of the transition part 11 is adapted to the width of the protection element 113.

[0027] Among them, the second electrode point 112 is directly electrically connected to the negative electrode of the battery cell. Electrodes are provided at both ends of the protection board 1. The current of the battery cell 3 is controlled by the charge and discharge circuit located on the protection board 1 and then output to the outside through the electrode to complete the discharge. It can also be input from the electrode, enter the battery cell 3 through the charge and discharge circuit, and store the electric energy in the battery cell. The protection element 113 used can be a fuse or a MOS (i.e., metal-oxide semiconductor field effect transistor, the abbreviation of MOSFET). In this embodiment, MOS is selected as the protection element 113, which has the advantages of low power consumption, high performance, high reliability, and low cost, and can realize integration and miniaturization, reduce the occupied space, and can increase the relative energy reserve in the battery cell.

[0028] like Figure 3 As shown, Figure 3 The protective board 1 includes a carrier board 114, the carrier board 114 is mounted on the adapter 11, the protective element 113 is mounted on the carrier board 114, and the protective element 113 is electrically connected to the charging and discharging circuit through the carrier board 114.

[0029] Among them, the carrier 114 is fixedly mounted on the protection board 1 in the form of welding, and the carrier 114 is located between the first electrode point 111 and the second electrode point 112, playing the role of protecting the circuit. Specifically, when the battery is charged to the set maximum voltage, the protection element 113 can be used as an overcharge protection switch. When the charging current flows through the protection element 113, once the set voltage threshold is reached, the protection element 113 disconnects the charge and discharge circuit to prevent further charging, thereby avoiding damage to the battery due to overcharging. When the battery voltage drops to the set minimum voltage level, the protection element 113 can be used as an over-discharge protection switch. When the battery is discharged, if the voltage drops to a dangerous level, the protection element 113 will be closed to prevent further discharge to prevent the battery from being over-discharged and damaged. The protection element 113 can also be used to detect short circuits in the circuit. When a short circuit occurs in the circuit, the current will increase sharply, and the protection element 113 can respond quickly and shut down to prevent excessive current, thereby protecting the battery and other circuit components from damage.

[0030] The battery protection structure also includes a protection layer 115, which is located above the carrier 114, and covers the end of the protection element 113 away from the carrier 114, and covers the surrounding side of the protection element 113; the toughness of the protection layer 115 is greater than the toughness of the protection element 113.

[0031] The protective layer 115 covers the protective element 113, which can effectively protect the protective element 113 on the carrier and the side of the carrier 114 on which the protective element 113 is installed, avoiding damage to the carrier 114 due to the collision position occurring outside the protective layer 115, and protecting the protective element 113 on the carrier so that it is no longer exposed to the air, reducing or avoiding the collision of other components with the protective element 113 due to vibration and other reasons, thereby causing damage to the protective element 113, improving the stability of the protective element 113, ensuring that the function of the protective element 113 is not affected, and improving the safety of the battery.

[0032] The peripheral edge of the protection layer 115 is flush with the peripheral edge of the carrier board 114 .

[0033] The protective layer 115 does not extend beyond the carrier 114 to ensure that the width of the used space is compatible with the adapter 11 and does not occupy additional space, thereby ensuring the technical effect of shortening the width of the protective plate 1; and the protective layer 115 is not inside the carrier 114 to ensure that the protective elements 113 on the carrier 114 are all protected, thereby improving the protection effect on the protective elements 113.

[0034] The difference between the width of the transfer portion 11 and the width of the carrier plate 114 is less than 5 mm.

[0035] When the width of the adapter 11 is close to or even the same as the width of the carrier 114, the width occupied by the protection board 1 can be compressed to the maximum extent, so that more space can be allocated to the battery cell 3 to increase the power reserve in the battery cell 3. In this embodiment, the width of the adapter 11 is the same as the width of the carrier 114, and the redundant space is cut off, thereby maximizing the space utilization.

[0036] Through the above arrangement, the protective layer 115 is designed to be flush with the peripheral edge of the carrier 114, so that the protective element 113 on the carrier and the side of the carrier 114 on which the protective element 113 is installed can be effectively protected, and the carrier 114 can be prevented from being damaged due to the collision position occurring outside the protective layer 115; at the same time, the edge of the protective layer 115 does not exceed the peripheral edge of the carrier 114, which can also improve the service life of the protective layer 115, and prevent the collision from occurring outside the carrier 114 during use, causing the protective layer 115 to be damaged too quickly, which will bring about the problem of reduced service life of the protective layer 115, and then cause the protection time of the protective element 113 to be shortened, threatening the safety of the battery. Further, the protective layer 115 has good heat dissipation performance, which is achieved by selecting heat dissipation gel as the injection molding material and adding a material that is conducive to heat dissipation therein, which is distributed in the gel in the form of particles, and the mixing ratio is between 0% and 10%, with 5% being the optimal ratio. The design of the protective layer 115 to be flush with the peripheral edge of the carrier 114 can be achieved through an injection molding process. The injection molding process of this solution uses the SIP (System in Package) process, which is an integrated circuit (IC) packaging technology. In the SIP process, components such as chips, passive components (such as resistors, capacitors), connectors, etc. of different functional modules are integrated into a package to form a complete functional module or system. These components can be chips from different suppliers or homemade chips. Through the SIP process, the space that needs to be reserved at the edge of the adapter 11 is eliminated, thereby reducing the occupied width of the protection plate 1, so that when the total length of the battery remains unchanged, more space can be provided to the battery cell, increasing the proportion of the battery cell to the battery and the energy reserve in the battery cell. Finally, the reason why the difference between the width of the adapter 11 and the width of the carrier 114 is less than 5 mm is that if the difference between the width of the adapter 11 and the width of the carrier 114 is greater than 5 mm, it will not be able to reduce the width of the protection plate 1 and thus increase the length ratio of the battery cell 3 and the energy reserve in the battery cell.

[0037] In addition, in this embodiment, the protection element 113 is mounted on the carrier 114 in the form of a patch. Of course, in other embodiments, the protection element 113 can also be mounted on the carrier 114 in other forms such as welding.

[0038] like Figure 4-Figure 5 As shown, Figure 4is a structural diagram of a transfer sheet according to an exemplary embodiment of the present specification, Figure 5 It is a side cross-sectional view of the adapter sheet shown in this specification according to an exemplary embodiment. The battery protection structure also includes an adapter sheet 2, one end of the adapter sheet 2 is electrically connected to the negative electrode of the battery cell 3, and the other end is electrically connected to the first electrode point 111 of the adapter portion 11; the adapter sheet 2 includes a substrate 21 and a laminate 22, and the substrate 21 is connected to the first electrode point 111. The battery protection plate 1 includes a first surface 116, and the first electrode point 111 is located on the first surface 116; the substrate 21 includes a main body 211, a bending portion 212 and a connecting portion 213; the bending portion 212 extends along the thickness direction of the battery protection plate 1, and connects the main body 211 and the connecting portion 213; the connecting portion 213 abuts against the first surface 116 and is electrically connected to the first electrode point 111.

[0039] The stacking sheet 22 and the substrate 21 are stacked in the thickness direction. The ratio of the thickness of the stacking sheet 22 to the thickness of the substrate 21 is greater than or equal to 0.5, and less than or equal to 1.5. The inventors have found through a large number of tests that when the ratio of the thickness of the stacking sheet 22 to the thickness of the substrate 21 is greater than or equal to 0.5, adding stacking sheets begins to have a better effect of reducing impedance and a more obvious effect of accelerating heat dissipation; when the ratio of the thickness of the stacking sheet 22 to the thickness of the substrate 21 is less than 1.5, the stacking sheet 22 can be installed in the accommodating space 4; when the ratio of the thickness of the stacking sheet 22 to the thickness of the substrate 21 is 1.5, the stacking sheet 22 can be just between the main body 211 and the connecting portion 213, at which time the stacking sheet 22 is in contact with both the main body 211 and the connecting portion 213, reaching the maximum value of the stacking sheet 22.

[0040] Among them, the adapter 2 includes a number of guides and insulating sheets. The function of the insulating sheets is to avoid unnecessary connection between the positive and negative electrodes, and to ensure that the connection point between the adapter 2 and the protective plate 1 is determined; the function of the guide sheets is to adjust the connection method between the adapter and the protective plate, and to provide a transfer sheet for easy maintenance. Furthermore, in this solution, the thickness of the substrate 21 is equal to the thickness of the laminate 22, that is, the ratio of the thickness of the laminate 22 to the thickness of the substrate 21 is 1.0, and a balance is taken between providing a better impedance reduction effect and reducing the space occupation effect, so that the smallest parallel impedance can be provided with the largest thickness while occupying a small space, thereby better reducing the total impedance of the adapter 2 after parallel connection, and the heat dissipation area can be increased by increasing the surface area, so as to achieve the purpose of improving the heat dissipation effect.

[0041] In addition, the battery protection board 1 includes a first surface 116, and the first electrode point 111 is located on the first surface 116; the substrate 21 includes a main body 211, a bent portion 212 and a connecting portion 213; the bent portion 212 extends along the thickness direction of the battery protection board 1, and connects the main body 211 and the connecting portion 213; the connecting portion 213 abuts against the first surface 116 and is electrically connected to the first electrode point 111; the main body 211 is away from the first surface 116 relative to the connecting portion 213, and is spaced apart from the connecting portion 213 to form a receiving space 4; at least part of the laminate 22 is located in the receiving space 4. Along the thickness direction of the adapter 2, the orthographic projection area of ​​the laminate 22 is less than or equal to the orthographic projection area of ​​the substrate 21; the ratio of the orthographic projection area of ​​the laminate 22 to the orthographic projection area of ​​the substrate 21 is greater than or equal to 0.7 and less than 1. The ratio of the orthographic projection area of ​​the stack to the orthographic projection area of ​​the substrate is less than 1, so that the stack can be normally installed on the substrate. The ratio of the orthographic projection area of ​​the stack to the orthographic projection area of ​​the substrate is greater than or equal to 0.7, which can effectively improve heat dissipation while reducing total impedance.

[0042] Among them, the first surface 116 is the side close to the adapter 2, and the first electrode point 111, the second electrode point 112 and the mounting position of the carrier 114 are all located on the first surface 116. In this embodiment, the number of the connecting parts 213 of the adapter 2 is 2, distributed at both ends of the connecting part 213, and the number of the first electrode points 111 is also 2, and the two connecting parts 213 are electrically connected to the two first electrode points 111 respectively. Furthermore, since the adapter 2 includes two connecting parts 213, the current flowing from the battery cell 3 into the adapter 2 will be diverted to the two bending parts 212 corresponding to the two connecting parts 213 through the main body 211 in the adapter 2, and then flow into the two first electrode points 111 of the protection board 1 through the two connecting parts 213, so as to realize the diversion of large current. This not only reduces the heating power by reducing the branch current, but also effectively improves the battery use threshold, protects the battery circuit, prolongs the battery life, and ensures the safety performance of the electronic equipment.

[0043] In addition, by setting up the accommodation space 4, the installation position required for the stack 22 is reserved, and more space for accommodating the thickness of the stack 22 is provided, thereby improving the heat dissipation capacity of the battery, reducing the heat generated by the circuit, and being able to better protect the circuit. In addition, in order to avoid the occurrence of phenomena such as cross-current, insulating sheets are provided on both sides of each position of the adapter to achieve insulation between the positive and negative electrodes while saving space, thereby improving the safety of the battery, and by providing a guide sheet between the first electrode point 111 and the connecting portion 213, the fixed connection between the guide sheet and the first electrode point 111 and the connecting portion 213 is welding, which is convenient for maintenance and improves the convenience of maintenance. In addition, by setting the stack position in this way, by setting the stack 22 in the space formed by the substrate 21, it is avoided to be set outside the accommodation space 4, which can improve the space utilization rate and better reduce the total thickness of the adapter 2 and the protective plate 1.

[0044] Furthermore, in this solution, the material of the adapter is copper-plated nickel material, which has good electrical conductivity. Copper is an excellent conductive material, and nickel has a higher electrical conductivity. Copper-plated nickel material can provide good electrical conductivity, reduce the internal resistance of the battery, and thus improve the charging and discharging efficiency and performance of the battery. Moreover, it has strong corrosion resistance. Nickel has high corrosion resistance, and the copper plating can further enhance the corrosion resistance of the material. In the battery, copper-plated nickel material can effectively resist the corrosion of the internal materials of the battery by chemicals in the electrolyte and the environment, and extend the service life of the battery. Finally, copper-plated nickel material has good weldability, high hardness and good mechanical strength, and can be welded and connected with other battery components (such as electrodes, connectors, etc.), thereby achieving reliable connection and stability of the internal circuit of the battery, and can also enhance the structural stability and durability of the battery, and reduce damage and deformation caused by external shock or vibration.

[0045] On the other hand, the present specification provides a battery, which includes the battery protection structure as described above.

[0046] Another aspect of the present specification provides an electronic device, wherein the electronic device includes the battery as described above.

[0047] A power storage device is set in the battery cell, so that under the control of the charging and discharging circuit in the protection board, charging and discharging can be carried out according to demand to meet various usage scenarios of the battery.

Claims

1. A battery protection structure, used to connect to a battery cell, characterized in that: include: A protection plate (1), the protection plate (1) comprising a transition portion (11), the transition portion (11) being provided with a first electrode point (111) and a second electrode point (112), the first electrode point (111) being used for electrically connecting to a positive electrode of the battery cell (3), and the second electrode point (112) being used for electrically connecting to a negative electrode of the battery cell (3); and A charge and discharge circuit, the charge and discharge circuit comprising a protection element (113), the protection element (113) being fixed to the adapter (11) and used to limit a maximum current threshold of the charge and discharge circuit, the first electrode point (111) and the second electrode point (112) being electrically connected via the charge and discharge circuit; The width of the adapter portion (11) is adapted to the width of the protection element (113).

2. The battery protection structure according to claim 1, characterized in that: The protection plate (1) further comprises a carrier plate (114), The carrier board (114) is mounted on the adapter part (11), the protection element (113) is mounted on the carrier board (114), and the protection element (113) is electrically connected to the charging and discharging circuit via the carrier board (114).

3. The battery protection structure according to claim 2, characterized in that: The battery protection structure further comprises a protection layer (115), The protective layer (115) is located above the carrier board (114), and the protective layer (115) covers an end of the protective element (113) away from the carrier board (114), and covers the peripheral side of the protective element (113); The toughness of the protective layer (115) is greater than the toughness of the protective element (113).

4. The battery protection structure according to claim 3, characterized in that: The peripheral edge of the protective layer (115) is flush with the peripheral edge of the carrier board (114).

5. The battery protection structure according to claim 1, characterized in that: The battery protection structure also includes a switching sheet (2), One end of the adapter sheet (2) is used to be electrically connected to the negative electrode of the battery cell (3), and the other end is electrically connected to the first electrode point (111) of the adapter portion (11); The adapter sheet (2) comprises a substrate (21) and a laminate (22); the substrate (21) is connected to the first electrode point (111); and the laminate (22) and the substrate (21) are stacked in a thickness direction.

6. The battery protection structure according to claim 5, characterized in that: The ratio of the thickness of the laminate (22) to the thickness of the substrate (21) is greater than or equal to 0.5 and less than or equal to 1.

5.

7. The battery protection structure according to claim 5, characterized in that: The protection plate (1) comprises a first surface (116), and the first electrode point (111) is located on the first surface (116); The base sheet (21) comprises a main body portion (211), a bent portion (212) and a connecting portion (213); the bent portion (212) extends along the thickness direction of the protection plate (1) and connects the main body portion (211) and the connecting portion (213); The connecting portion (213) abuts against the first surface (116) and is electrically connected to the first electrode point (111); The main body portion (211) is located away from the first surface (116) relative to the connecting portion (213), and is spaced apart from the connecting portion (213) to form a receiving space (4); At least a portion of the laminate (22) is located in the accommodating space (4).

8. The battery protection structure according to claim 5, characterized in that: Along the thickness direction of the adapter sheet (2), the orthographic projection area of ​​the laminate (22) is less than or equal to the orthographic projection area of ​​the substrate (21); The ratio of the orthographic projection area of ​​the laminate (22) to the orthographic projection area of ​​the substrate (21) is greater than or equal to 0.7 and less than 1.

9. A battery protection structure according to claim 1, characterized in that: The difference between the width of the transition portion (11) and the width of the protection element (113) is less than 5 mm.

10. A battery, characterized in that: The invention comprises a battery cell and a battery protection structure as claimed in any one of claims 1 to 9, wherein the battery cell and the battery protection structure are electrically connected.

11. An electronic device, characterized in that: Comprising the battery as claimed in claim 10.

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