Fusing structure, battery cell adapter sheet, connecting bar sheet and battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a fusing structure, a battery cell adapter piece, a connecting bar piece and a battery pack, the fusing structure comprises a conductive piece and a fusing piece, the conductive piece comprises a first sub-piece and a second sub-piece, the fusing piece is provided with a first end and a second end, the first end of the fusing piece is connected with the first sub-piece, and the second end of the fusing piece is connected with the second sub-piece. The second end of the fusing piece is connected with the second sub-piece, the fusing piece is made of materials with the melting point smaller than that of the conducting piece, and the fusing piece is made of any one of tin, lead-tin alloy, cadmium-indium-tin alloy or bismuth-tin alloy. According to the invention, the original conducting strip is disconnected, and then the disconnected conducting strip is connected by using the fusing piece with the melting point lower than that of the conducting strip, so that when the conducting strip has high temperature in an abnormal condition, the fusing piece can be fused more quickly, and an abnormal circuit is cut off; a narrow flow part does not need to be arranged on the body of the conducting strip, so that the condition that the body of the connecting strip is heated in normal use is reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a fuse structure, a battery cell adapter, a connecting bar and a battery pack. Background Art

[0002] With the rapid development of new energy, the proportion of fuel vehicles is gradually decreasing while the proportion of electric vehicles is gradually increasing, and the energy storage market is also growing rapidly. However, batteries still face safety risks. Batteries still have the phenomenon of thermal runaway and explosion, which poses a great safety risk. Most of the thermal runaway is caused by battery short circuit, which causes the temperature to rise rapidly, resulting in rapid reaction of battery materials and explosion.

[0003] In current technology, in order to reduce the possibility of explosion when the battery is short-circuited, a narrow flow part is set at the battery cell adapter, that is, a hole or groove of a specific size is punched out on the adapter or the width of a specific area is reduced to form a narrow flow part, thereby accelerating the temperature rise of this part, so that when a short circuit occurs, high temperature will appear and the connecting piece will melt, achieving the effect of breaking the circuit.

[0004] However, in normal use of this solution, the narrow (power-limited) current region generates relatively large heat, which causes the battery temperature to be relatively high, affecting the battery life and other performances. Summary of the invention

[0005] The present disclosure provides a fuse structure, a battery cell adapter, a connecting bar and a battery pack to solve the problem in the above-mentioned prior art that the narrow flow area of ​​the battery cell adapter generates relatively large heat, resulting in a relatively high temperature of the battery during normal use, affecting the battery life and other performances.

[0006] In a first aspect, the present disclosure provides a fuse structure, comprising:

[0007] A conductive sheet and a fuse, wherein the conductive sheet comprises a first sub-sheet and a second sub-sheet, the fuse comprises a first end and a second end, the first end of the fuse is connected to the first sub-sheet, and the second end of the fuse is connected to the second sub-sheet, the material of the fuse is a material having a melting point lower than that of the conductive sheet, and the material of the fuse comprises any one of tin, lead-tin alloy, cadmium-indium-tin alloy or bismuth-tin alloy.

[0008] In some embodiments, the first end of the fuse is clamped to the first sub-piece, and the second end of the fuse is clamped to the second sub-piece.

[0009] In some embodiments, the connection structure between the fuse and the conductive sheet is configured as follows:

[0010] A first receiving groove is formed at the first end of the fuse, a first clamping column is provided on the side wall of the first receiving groove, a first clamping hole is formed at the first sub-piece, and the first clamping column is inserted into the first clamping hole;

[0011] and / or

[0012] A second receiving groove is formed at the second end of the fuse, a second clamping column is disposed on the side wall of the second receiving groove, a second clamping hole is formed at the second sub-piece, and the second clamping column is inserted into the second clamping hole.

[0013] In some embodiments, the fuse is arranged in an I-shape, the first end of the fuse is provided with the first receiving groove, and the second end of the fuse is provided with the second receiving groove.

[0014] In some embodiments, the connection structure between the fuse and the conductive sheet is configured as follows:

[0015] A third clamping hole is formed at the first end of the fuse, a third accommodating groove is formed at the first sub-piece, a third clamping column is provided on the side wall of the third accommodating groove, and the third clamping column is inserted into the third clamping hole;

[0016] and / or

[0017] The second end of the fuse is provided with a fourth clamping hole, the second sub-piece is provided with a fourth accommodating groove, the side wall of the fourth accommodating groove is provided with a fourth clamping column, and the fourth clamping column is inserted into the fourth clamping hole.

[0018] In some embodiments, the conductive sheet is made of any one of copper, aluminum, nickel alloy, phosphor bronze, or nickel-plated steel.

[0019] In some embodiments, the width of the fuse is less than or equal to the width of the conductive sheet.

[0020] In a second aspect, the present disclosure provides a battery cell adapter, comprising the fuse structure described in any one of the above embodiments.

[0021] In a third aspect, the present disclosure provides a connecting bar for electrical connection between two battery cells, including the fuse structure described in any one of the above embodiments.

[0022] In a fourth aspect, the present disclosure provides a battery pack, characterized in that it includes the fuse structure described in any one of the above embodiments.

[0023] The present disclosure provides a fuse structure, a cell adapter sheet, a connecting bar sheet and a battery pack, which disconnect the original conductive sheet into a first sub-sheet and a second sub-sheet, and then connect the first sub-sheet and the second sub-sheet by using a fuse having a lower melting point than the conductive sheet, so that the melting point of the connecting portion of the conductive sheet is greatly reduced. When the conductive sheet reaches a high temperature under abnormal circumstances, the fuse can be blown more quickly to cut off the abnormal circuit. At the same time, after using the fuse, there is no need to groove or narrow the structure on the connecting sheet body, that is, there is no need to set a narrow flow area, thereby reducing the heating of the connecting sheet body during normal use. Furthermore, the area of ​​the connecting piece body does not change, and after being connected to the fuse, the current conduction area becomes larger, thereby further reducing the heating of the connecting sheet during normal use, and improving the performance stability of products using the fuse structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present disclosure will be described in more detail below based on embodiments and with reference to the accompanying drawings:

[0025] Figure 1 An overall schematic diagram of a fuse structure provided in an embodiment of the present disclosure;

[0026] Figure 2 A schematic diagram of the connection relationship between a first sub-piece and a fuse of a fuse structure provided in an embodiment of the present disclosure;

[0027] Figure 3 A schematic diagram of the overall structure of a battery cell adapter provided in an embodiment of the present disclosure;

[0028] Figure 4 A schematic diagram of the overall structure of a connecting bar provided in an embodiment of the present disclosure;

[0029] Figure 5 A schematic diagram of the overall structure of a battery pack provided in an embodiment of the present disclosure.

[0030] Explanation of the reference numerals: 100, conductive sheet; 110, first sub-sheet; 111, first snap-in hole; 120, second sub-sheet; 121, second snap-in hole; 200, fuse; 210, first accommodating groove; 211, first snap-in column; 220, second accommodating groove; 221, second snap-in column.

[0031] In the drawings, the same reference numerals are used for the same components, and the drawings are not drawn to scale. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, and to fully understand and implement how the present disclosure applies technical means to solve technical problems and achieve the corresponding technical effects, the technical solution in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only embodiments of a part of the present disclosure, not all of the embodiments. The embodiments of the present disclosure and the various features in the embodiments can be combined with each other without conflict, and the technical solutions formed are all within the scope of protection of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present disclosure.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0034] In current battery designs, in order to cope with internal or external short circuits in the battery, a narrow (current-limited) current section is usually set on the connector (such as an aluminum connector), mainly by changing the physical structure of the connector to achieve the concentration of current in a specific area, changing the local resistance of the connector, thereby accelerating the temperature rise in the area and achieving the effect of melting. The core principle of this design is to use the thermal effect of current in a conductor, namely the Joule-Lenz Law, so that when a short circuit occurs, the current is concentrated in these narrow areas, causing the temperature of these areas to rise rapidly. When the temperature reaches the melting point of the connector material (about 660°C for aluminum), the connector will melt, thereby disconnecting the circuit and preventing the short-circuit current from further damaging the battery or other electronic devices.

[0035] However, the above-mentioned narrow (current-limited) current section has application limitations. During normal use, although the current will not reach the level of short circuit, the resistance of the narrow (current-limited) current area is still higher than that of other parts. Therefore, even if the current is within the normal range, these areas will generate more heat. The accumulated heat over a long period of time will affect the temperature of the battery. Excessive temperature will accelerate the rate of chemical reactions inside the battery, resulting in the attenuation of battery capacity and shortened life. In addition, high temperature may also cause changes in the performance of other materials inside the battery (such as electrolyte, diaphragm, etc.), further affecting the overall performance and safety of the battery.

[0036] In addition, due to the existence of the narrow (current-limited) current region, the energy conversion efficiency of the battery during normal operation will also be affected, because part of the energy is converted into heat instead of electrical energy, thereby reducing the energy utilization rate of the battery.

[0037] To solve the above problems, in this embodiment, Figure 1 and Figure 2 As shown, a fuse structure is provided, including: a conductive sheet 100 and a fuse 200, the conductive sheet 100 includes a first sub-sheet 110 and a second sub-sheet 120, the fuse 200 has a first end and a second end, the first end of the fuse 200 is connected to the first sub-sheet 110, and the second end of the fuse 200 is connected to the second sub-sheet 120, the material of the fuse 200 is a material with a melting point lower than the melting point of the conductive sheet 100, and the material of the fuse 200 includes any one of tin, lead-tin alloy, cadmium-indium-tin alloy or bismuth-tin alloy.

[0038] In this embodiment, the conductive sheet 100 is composed of two main parts, namely, a first sub-sheet 110 and a second sub-sheet 120. The first sub-sheet 110 and the second sub-sheet 120 are the main channels for current transmission, and their materials can be selected from metals with good conductive properties, such as copper, aluminum, etc., so that under normal use conditions, the current can pass smoothly while maintaining low resistance and heat generation.

[0039] The two ends of the fuse 200 are connected to the first sub-piece 110 and the second sub-piece 120 respectively. Under normal working conditions, the fuse 200 serves to connect the two sub-pieces to ensure smooth transmission of current. In order to achieve the fusing function, the material of the fuse 200 needs to have a low melting point, such as any one of tin, lead-tin alloy, cadmium-indium-tin alloy or bismuth-tin alloy. Generally, the melting point of tin is relatively low, at about 230°C, the melting point of lead-tin alloy depends on its component ratio, roughly between 200 and 320°C, the melting point of bismuth-tin alloy is usually lower than pure tin, at about 138°C, and the melting point of cadmium-indium-tin alloy is usually between 156.6°C (melting point of indium) and 321°C (melting point of cadmium).

[0040] In actual use, the fuse 200 can be selected according to the safe temperature range that the product components can withstand. For example, the fuse structure of this embodiment is used on a battery. The safe temperature that the battery can withstand is 100°. Correspondingly, a material with a melting point of about 80° is selected, such as tin-bismuth alloy or gallium alloy. When the battery heats up abnormally, the fuse 200 can be blown first to cut off the abnormal circuit, thereby improving the safety of the battery.

[0041] To further ensure that the conductive performance of the connecting piece is not affected, in one embodiment, the material of the fuse 200 can also be selected to have a conductive performance comparable to that of the connecting piece and a lower melting point than that of the conductive piece 100. For example, when the conductive piece 100 is an aluminum sheet, the material of the fuse 200 can be selected to be a lead-tin alloy, which not only makes the melting point of the fuse 200 lower than that of the conductive piece 100, but also ensures that the overall conductive performance of the fuse structure is good.

[0042] In summary, the present disclosure provides a fuse structure, which disconnects the original conductive sheet 100 into a first sub-sheet 110 and a second sub-sheet 120, and then connects the first sub-sheet 110 and the second sub-sheet 120 using a fuse 200 having a melting point lower than that of the conductive sheet 100, so that the melting point of the connecting part of the conductive sheet 100 is greatly reduced. When the conductive sheet 100 reaches a high temperature in an abnormal situation, the fuse 200 can be blown more quickly to cut off the abnormal circuit.

[0043] At the same time, after using the fuse 200, there is no need to make grooves or narrowing structures on the connecting piece body, that is, there is no need to set a narrow current area, thereby reducing the heating of the connecting piece body during normal use. Furthermore, the area of ​​the connecting piece body does not change, and after being connected to the fuse 200, the current conduction area becomes larger, thereby further reducing the heating of the connecting piece during normal use, and improving the performance stability of the product using the fuse structure.

[0044] In one embodiment, the first end of the fuse is clamped to the first sub-piece, and the second end of the fuse is clamped to the second sub-piece.

[0045] In this embodiment, the first sub-piece and the second sub-piece may be provided with a slot or buckle for clamping with the two ends of the fuse. The shape and size of the slot or buckle may be set according to the specifications of the fuse to ensure the stability and reliability of the connection. Both ends of the fuse may be provided with a protrusion or groove matching the slot or buckle so as to be clamped with the conductive sheet.

[0046] By making the fuse element clamped with the first sub-piece and the second sub-piece, there are at least the following benefits:

[0047] 1. Reduce contact resistance: The clamping structure can make the fuse 2 fit tightly with the conductive sheet. The tight fit can reduce the obstruction of current transmission, reduce the heat generated when current passes through, and improve the current transmission efficiency.

[0048] 2. It can improve the stability of the electrical connection between the fuse and the conductive sheet and reduce the risk of poor contact or looseness.

[0049] 3. The clamping structure makes the connection between the fuse and the conductive sheet simple and quick, without the need for complicated tools or steps, thereby improving the efficiency of installation and replacement.

[0050] In one embodiment, if Figure 2 As shown, the connection structure between the fuse 200 and the conductive sheet 100 is configured as follows:

[0051] The first end of the fuse 200 defines a first receiving groove 210 , a side wall of the first receiving groove 210 is provided with a first clamping column 211 , the first sub-piece 110 defines a first clamping hole 111 , and the first clamping column 211 is inserted into the first clamping hole 111 .

[0052] In this embodiment, a first receiving groove 210 is provided at the first end of the fuse 200, and the first sub-piece 110 is partially received in the first receiving groove 210, and the first sub-piece 110 is fixed to the fuse 200 by the snap fit between the first snap post 211 and the first snap hole 111.

[0053] In one embodiment, the connection structure between the fuse 200 and the conductive sheet 100 is configured as follows:

[0054] The second end of the fuse 200 is provided with a second receiving groove 220 , the side wall of the second receiving groove 220 is provided with a second clamping column 221 , the second sub-piece 120 is provided with a second clamping hole 121 , and the second clamping column 221 is inserted into the second clamping hole 121 .

[0055] In this embodiment, a second accommodating groove 220 is provided at the second end of the fuse 200, and the second sub-piece 120 is partially accommodated in the second accommodating groove 220. The second sub-piece 120 is fixed to the fuse 200 by the snap-fitting cooperation between the second snap-fitting column 221 and the second snap-fitting hole 121.

[0056] In one embodiment, a first receiving groove 210 is provided at the first end of the fuse 200, a first clamping column 211 is provided on the side wall of the first receiving groove 210, a first clamping hole 111 is provided at the first sub-piece 110, and the first clamping column 211 is inserted into the first clamping hole 111; meanwhile, a second receiving groove 220 is provided at the second end of the fuse 200, a second clamping column 221 is provided on the side wall of the second receiving groove 220, a second clamping hole 121 is provided at the second sub-piece 120, and the second clamping column 221 is inserted into the second clamping hole 121. By providing receiving grooves at both ends of the fuse 200, the structure can be made simpler and convenient for mass production.

[0057] In one embodiment, the fuse is arranged in an I-shape, the first end of the fuse is provided with the first accommodating groove, and the second end of the fuse is provided with the second accommodating groove.

[0058] In this embodiment, the first receiving groove is formed on the end surface of the first end of the fuse, and the second receiving groove is formed on the end surface of the first end of the fuse. When the first sub-piece is connected to the fuse, the two opposite sides of the first sub-piece are respectively abutted against the two opposite side walls of the first receiving groove, and when the second sub-piece is connected to the fuse, the two opposite sides of the second sub-piece are respectively abutted against the two opposite side walls of the first receiving groove. The connection method of this embodiment further increases the connection area between the fuse and the conductive sheet, reduces the obstruction of the current during the transmission process, reduces the heat generated when the current passes, and improves the transmission efficiency of the current.

[0059] In one embodiment, a first accommodating groove can be opened on the surface of the first end of the fuse and penetrate through a side wall of the fuse. The clamping column is arranged on two opposite side walls of the first accommodating groove. A first clamping hole is opened on two opposite side walls of the first sub-piece. The first clamping column is inserted into the first clamping hole, thereby fixing the first sub-piece on the surface of the fuse.

[0060] In one embodiment, it is characterized in that the connection structure between the fuse and the conductive sheet is configured as follows:

[0061] A third clamping hole is formed at the first end of the fuse, a third accommodating groove is formed at the first sub-piece, a third clamping column is provided on the side wall of the third accommodating groove, and the third clamping column is inserted into the third clamping hole;

[0062] and / or

[0063] The second end of the fuse is provided with a fourth clamping hole, the second sub-piece is provided with a fourth accommodating groove, the side wall of the fourth accommodating groove is provided with a fourth clamping column, and the fourth clamping column is inserted into the fourth clamping hole.

[0064] In this embodiment, in contrast to the aforementioned connection structure, grooves may be formed on the first and second sub-pieces, clamping posts may be provided on the side walls of the grooves, and clamping holes may be provided at both ends of the fuse to achieve connection between the fuse and the conductive sheet. The specific structure is similar to that in the aforementioned embodiment, and will not be described again here to avoid repetition.

[0065] In one embodiment, the material of the conductive sheet includes any one of copper, aluminum, nickel alloy, phosphor copper or nickel-plated steel.

[0066] In this embodiment, the material of the conductive sheet can be any one of copper, aluminum, nickel alloy, phosphor bronze or nickel-plated steel, or other materials, which are selected according to the specific application scenario and are not specifically limited here.

[0067] In one embodiment, the width of the fuse is less than or equal to the width of the conductive sheet.

[0068] It is understandable that when the contact area between the fuse and the conductive sheet increases, the same amount of current will be dispersed over a larger area, thereby reducing the current density. Lower current density means less heat generated per unit area, which helps reduce the risk of local overheating of the fuse. However, when the contact area (fuse area) is too large, it is not conducive to the rapid melting of the fuse and will affect the efficiency of circuit cutting. Therefore, in order to improve the melting stability, the width of the fuse is made less than or equal to the width of the conductive sheet, which ensures the stability of conductivity and improves the stability of the melting process.

[0069] In one embodiment, a battery cell adapter is provided, such as Figure 2 and Figure 3 As shown, it includes the fuse structure in any of the above embodiments. Specifically, the battery cell adapter includes an adapter body and a fuse 200, and the adapter body is divided into a first sub-piece 110 and a second sub-piece 120. The first end of the fuse 200 is provided with a first accommodating groove 210, and the side wall of the first accommodating groove 210 is provided with a first clamping column 211. The first sub-piece 110 is provided with a first clamping hole 111, and the first clamping column 211 is inserted into the first clamping hole 111. The second end of the fuse 200 is provided with a second accommodating groove 220, and the side wall of the second accommodating groove 220 is provided with a second clamping column 221. The second sub-piece 120 is provided with a second clamping hole 121, and the second clamping column 221 is inserted into the second clamping hole 121. When a short circuit or thermal runaway occurs inside the battery, the battery cell adapter can be melted in a shorter time, cutting off the abnormal circuit and reducing the occurrence of danger.

[0070] In one embodiment, Figure 2 and Figure 4 As shown, a connecting bar is provided for electrical connection between two battery cells, including the fuse structure in any of the above embodiments. Specifically, the connecting bar includes a bar body and a fuse 200, and an arc-shaped connecting portion is provided in the middle of the bar body. The arc-shaped connecting portion can provide better structural support, so that the bar is more stable when subjected to external force and is not easily deformed or damaged. The bar body is divided from the middle into a first sub-piece 110 and a second sub-piece 120, and a first accommodating groove 210 is provided at the first end of the fuse 200, and a first clamping column 211 is provided on the side wall of the first accommodating groove 210, and a first clamping hole 111 is provided in the first sub-piece 110, and the first clamping column 211 is inserted into the first clamping hole 111. The second end of the fuse 200 is provided with a second receiving groove 220 , the side wall of the second receiving groove 220 is provided with a second clamping column 221 , the second sub-piece 120 is provided with a second clamping hole 121 , and the second clamping column 221 is inserted into the second clamping hole 121 .

[0071] In actual use, if the abnormally high temperature comes from external current or high temperature of the external environment, the fuse 200 connecting the bar can be melted faster, cutting off the connection between the battery cells and better protecting the battery.

[0072] In one embodiment, a battery pack is provided, such as Figure 5 As shown, it includes the fuse structure in any of the above embodiments. The battery pack in this embodiment uses the cell adapter and the connecting bar in the above embodiments at the same time. When the internal current of the battery is abnormal, the cell adapter can be quickly blown to cut off the spread of the abnormal current; if the abnormal high temperature comes from the external current or the high temperature of the external environment, the fuse 200 of the connecting bar can be blown faster, cutting off the connection between the battery cells and better protecting the battery. The battery pack of this embodiment is safer, and after using the fuse 200, the heating of the battery in normal use is also improved, and the energy utilization rate is correspondingly improved.

[0073] It should be noted that in the present disclosure, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element limited by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0074] Although the embodiments disclosed in the present disclosure are as above, the above contents are only embodiments adopted for facilitating the understanding of the present disclosure and are not intended to limit the present disclosure. Any technician in the technical field to which the present disclosure belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in the present disclosure, but the scope of patent protection of the present disclosure shall still be subject to the scope defined in the attached claims.

Claims

1. A fuse structure, characterized in that: include: A conductive sheet and a fuse, wherein the conductive sheet comprises a first sub-sheet and a second sub-sheet, the fuse comprises a first end and a second end, the first end of the fuse is connected to the first sub-sheet, and the second end of the fuse is connected to the second sub-sheet, the material of the fuse is a material having a melting point lower than that of the conductive sheet, and the material of the fuse comprises any one of tin, lead-tin alloy, cadmium-indium-tin alloy or bismuth-tin alloy.

2. The fuse structure according to claim 1, characterized in that: The first end of the fuse is clamped to the first sub-piece, and the second end of the fuse is clamped to the second sub-piece.

3. The fuse structure according to claim 2, characterized in that: The connection structure between the fuse and the conductive sheet is configured as follows: A first receiving groove is formed at the first end of the fuse, a first clamping column is formed on the side wall of the first receiving groove, a first clamping hole is formed at the first sub-piece, and the first clamping column is inserted into the first clamping hole; and / or A second accommodating groove is formed at the second end of the fuse, a second clamping column is disposed on the side wall of the second accommodating groove, a second clamping hole is formed at the second sub-piece, and the second clamping column is inserted into the second clamping hole.

4. The fuse structure according to claim 3, characterized in that: The fuse is arranged in an I-shape, the first end of the fuse is provided with the first accommodating groove, and the second end of the fuse is provided with the second accommodating groove.

5. The fuse structure according to claim 2, characterized in that: The connection structure between the fuse and the conductive sheet is configured as follows: A third clamping hole is formed at the first end of the fuse, a third accommodating groove is formed at the first sub-piece, a third clamping column is provided on the side wall of the third accommodating groove, and the third clamping column is inserted into the third clamping hole; and / or The second end of the fuse is provided with a fourth clamping hole, the second sub-piece is provided with a fourth accommodating groove, the side wall of the fourth accommodating groove is provided with a fourth clamping column, and the fourth clamping column is inserted into the fourth clamping hole.

6. The fuse structure according to claim 1, characterized in that: The material of the conductive sheet includes any one of copper, aluminum, nickel alloy, phosphor bronze or nickel-plated steel.

7. The fuse structure according to claim 1, characterized in that: The width of the fuse is less than or equal to the width of the conductive sheet.

8. A battery cell adapter, characterized in that: The invention comprises the fuse structure as described in any one of claims 1 to 7.

9. A connecting bar, used for electrical connection between two battery cells, characterized in that: It comprises the fuse structure described in any one of claims 1-7.

10. A battery pack, characterized in that: It comprises the fuse structure described in any one of claims 1-7.

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