Fuse structure, temperature acquisition circuit board and new energy battery pack

Abstract

The utility model relates to a kind of fuse structure, temperature acquisition circuit board and new energy battery pack.The fuse structure includes the fuse body for being set on temperature acquisition circuit board, and the branch fuse used in cooperation with fuse body;Wherein, the fuse body includes at least two sections of fuse segments connected in turn sequentially;Each section of fuse segment includes main chip body, and each one spare pad of being arranged at the both ends of main chip body;The branch fuse includes main solder body, and each one connecting pad of being arranged at the both ends of main solder body;When the section of fuse segment of fuse body is fused, branch fuse is used to be fused on the two spare pads of the fused fuse segment by the connecting pad of both ends of it corresponding welding.The utility model can solve the technical problem that the fuse structure on temperature acquisition circuit board in traditional technology is burnt out, and the maintenance is complex, and the cost is higher.

Description

Technical Field

[0001] This utility model relates to the field of new energy battery pack technology, and in particular to a fuse structure, a temperature acquisition circuit board, and a new energy battery pack. Background Technology

[0002] With the rapid development of new energy vehicles, the demand for new energy battery packs is constantly increasing. As a crucial component of new energy battery packs, the demand for FPCA (Flexible Printed Circuit Assembly) temperature acquisition circuit boards is also increasing significantly. Furthermore, as a temperature acquisition and protection device for new energy battery packs, the excellent protective performance of FPCA determines the safety of new energy vehicles.

[0003] Furthermore, ensuring the safety of the new energy battery pack via the temperature acquisition circuit board (FPCA) is closely related to the fuse structure on the FPCA. Through the fuse structure on the FPCA, the circuit within the new energy battery pack can be quickly and safely disconnected when a large current suddenly encounters it, thus ensuring the safety of the new energy battery pack and the entire vehicle. Moreover, the ability of the circuit within the new energy battery pack to quickly and safely disconnect is strongly correlated with the design of the fuse structure.

[0004] When a fuse blows, the entire new energy battery pack becomes inoperable. Since the value of the entire new energy battery pack represents a significant portion of the vehicle's cost, replacing the fuse is necessary to ensure its continued operation. However, in traditional technology, the integrated design of the fuse structure on the temperature acquisition circuit board (FPCA) makes fuse replacement complex, potentially requiring the replacement of the entire FPCA or even the entire new energy battery pack, resulting in high maintenance costs. Utility Model Content

[0005] This utility model provides a fuse structure, a temperature acquisition circuit board, and a new energy battery pack, which can solve the technical problem that the replacement and maintenance of the fuse structure on the temperature acquisition circuit board is complicated and costly after it burns out in traditional technology.

[0006] To solve the above-mentioned technical problems, this utility model provides a fuse structure, including a fuse body for mounting on a temperature acquisition circuit board, and a branch fuse used in conjunction with the fuse body; The fuse body includes at least two fuse segments connected in sequence; each fuse segment includes a main body and a spare pad at each end of the main body. The branch fuse includes a main welded body and a connecting pad at each end of the main welded body; When a segment of the fuse body melts, the branch fuse is used to weld to the two spare pads of the melted fuse segment via the connecting pads at both ends.

[0007] Optionally, the main body includes a first substrate layer, a first copper layer disposed on the first substrate layer, and a first cover layer disposed on the first copper layer. The first cover layer has a first opening, and the spare pad is disposed at the first opening.

[0008] Optionally, the first copper layer includes a first copper sheet, and both the first substrate layer and the first cover layer include a first polyimide layer disposed on one side of the first copper sheet via a first adhesive layer.

[0009] Optionally, the main solder body includes a second bottom cover layer, a second copper layer disposed on the second bottom cover layer, and a second top cover layer disposed on the second copper layer. The second bottom cover layer is provided with a second bottom opening, and the second top cover layer is provided with a second top opening corresponding to the second bottom opening. The connecting pads are disposed at the second bottom opening and the second top opening. The second copper layer is provided with a through hole between the second bottom opening and the second top opening.

[0010] Optionally, both the main body and the main welded body include a fuse breaking portion and a fuse connecting portion at each end of the fuse breaking portion. The spare pad or the connecting pad is located in the fuse connecting portion, and the width of the fuse connecting portion is greater than the width of the fuse breaking portion.

[0011] Optionally, the length and width values ​​of the fuse-breaking portion of the main body correspond one-to-one with the length and width values ​​of the fuse-breaking portion of the main welded body; The length and width values ​​of the fuse connection portion of the main body correspond one-to-one with the length and width values ​​of the fuse connection portion of the main welded body.

[0012] Optionally, the length of the spare pad is greater than the length of the connecting pad, and the width of the spare pad is greater than the width of the connecting pad. Each end of the connecting pad is provided with a solder via, and the diameter of the solder via is half the width of the connecting pad.

[0013] Optionally, on two adjacent fuse segments, two adjacent fuse connection portions are connected as one unit, and the spare solder pads on two adjacent fuse connection portions are spaced apart.

[0014] Optionally, when the fuse connection portion extends laterally in a horizontal direction, the fuse breaking portion is bent relative to the fuse connection portion.

[0015] Optionally, if the width of the fuse fusing portion is W, the length of the fuse fusing portion in the horizontal direction is Z, and the length of the fuse connecting portion is 0.5X and the width is Y, then the following relationship exists: 1.5Z ≥ X ≥ 0.5Z, Y ≥ 5 W; The bending angle of the fuse fuse section relative to the fuse connection section is α, and the range of α is 15°~165°.

[0016] Optionally, the fuse structure includes a connecting wire at each end of the fuse body; The connecting wire includes a main wire and a spare pad located at the wire connection end of the main wire. The wire connection end of the main wire is integrally formed with the end of the main body of a section of the fuse segment on the fuse body.

[0017] In addition, this utility model also proposes a temperature acquisition circuit board, comprising: Main circuit board; and, The fuse structure described above is provided on the main circuit board.

[0018] In addition, this utility model also proposes a new energy battery pack, comprising: Battery pack body; and, The temperature acquisition circuit board described above is located on the battery pack body.

[0019] The beneficial effects of the technical solution provided by this utility model include: By designing the fuse structure into a separate fuse body mounted on the temperature acquisition circuit board and a branch fuse used in conjunction with the fuse body, when a part of the fuse body blows due to a large current, the blown part on the fuse body can be replaced by soldering the matching branch fuse. This eliminates the need to replace the entire fuse structure, or even the entire temperature acquisition circuit board, or even the entire new energy battery pack when the fuse blows, greatly reducing the difficulty of fuse replacement and lowering the maintenance costs of the fuse structure, temperature acquisition circuit board, and new energy battery pack.

[0020] Specifically, by configuring the fuse body into multiple fuse segments, with each segment including a main body and a spare pad at each end of the main body, and by configuring the branch fuses to include a main welding body and a connecting pad at each end of the main welding body, when a fuse segment in the fuse body blows, the connecting pads at both ends of the branch fuses can be soldered to the two spare pads of the blown fuse segment, thereby reconnecting the blown fuse segment to other fuse segments. In this way, the blown fuse structure can be easily repaired simply by soldering and replacing the blown portion (fuse segment) of the fuse body using the branch fuses, simplifying the replacement and maintenance process and reducing replacement and maintenance costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a simplified structural diagram of the fuse structure described in an embodiment of the present invention; Figure 2 This is a simplified schematic diagram of the fuse body of the fuse structure described in the embodiment of this utility model; Figure 3 This is a simplified schematic diagram of the branch fuse structure described in the embodiment of this utility model; Figure 4 This is a simplified schematic diagram of the fuse body of the fuse structure described in this embodiment of the present invention when a section of the fuse fuse fuse body melts. Figure 5 This is a simplified schematic diagram of the fuse structure described in this embodiment, showing the branch fuse welded to the fuse body at the fused fuse segment. Figure 6 This is a simplified schematic diagram of the circuit board cross-section of the fuse body of the fuse structure described in this embodiment of the utility model; Figure 7 This is a simplified schematic diagram of the circuit board cross-section of the branch fuse of the fuse structure described in this embodiment of the present invention.

[0023] In the diagram: 10, Fuse structure; 100, Fuse body; 102, Fuse segment; 104, Connecting wire; 1042, Main wire; 110, Main body; 1102, Fuse fusing part; 1104, Fuse connecting part; 112, First substrate layer; 1122, First adhesive layer; 1124, First polyimide layer; 114, First copper layer; 116, First cover layer; 118, First opening; 120, Spare pad; 200, Branch fuse; 210, Main solder body; 212, Second bottom cover layer; 2122, Second adhesive layer; 2124, Second polyimide layer; 213, Second bottom opening; 214, Second copper layer; 2142, Through hole; 216, Second top cover layer; 218, Second top opening; 220, Connecting pad. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] like Figure 1 As shown, this utility model proposes a fuse structure 10, including a fuse body 100 for mounting on a temperature acquisition circuit board, and a branch fuse 200 used in conjunction with the fuse body 100. By designing the fuse structure 10 as a separate fuse body 100 mounted on the temperature acquisition circuit board and a branch fuse 200 used in conjunction with the fuse body 100, when a part of the fuse body 100 melts due to a large current, the melted part on the fuse body 100 can be replaced by soldering the matching branch fuse 200. This eliminates the need to replace the entire fuse structure 10, or even the entire temperature acquisition circuit board, or even the entire new energy battery pack when the fuse melts, greatly reducing the difficulty of fuse replacement and lowering the maintenance costs of the fuse structure 10, the temperature acquisition circuit board, and the new energy battery pack.

[0026] Furthermore, such as Figures 1 to 3 As shown, the fuse body 100 may include at least two fuse segments 102 connected in sequence. Each fuse segment 102 may include a main body 110 and a spare solder pad 120 at each end of the main body 110. Furthermore, the branch fuse 200 may include a main solder body 210 and a connecting solder pad 220 at each end of the main solder body 210. Figures 4 to 5As shown, when a fuse segment 102 of the fuse body 100 melts, the branch fuse 200 is used to be soldered to the two spare pads 120 of the melted fuse segment 102 via the connecting pads 220 at both ends of its ends.

[0027] By configuring the fuse body 100 into multiple fuse segments 102, with each segment including a main body 110 and a spare pad 120 at each end of the main body 110, and the branch fuse 200 including a main welding body 210 and a connecting pad 220 at each end of the main welding body 210, when a fuse segment 102 in the fuse body 100 blows, the connecting pads 220 at both ends of the branch fuse 200 can be soldered to the two spare pads 120 of the blown fuse segment 102, thereby reconnecting the blown fuse segment 102 to other fuse segments 102. In this way, only the blown portion (fuse segment 102) of the fuse body 100 needs to be soldered and replaced using the branch fuse 200, easily repairing the blown fuse structure 10, simplifying the replacement and maintenance process, and reducing replacement and maintenance costs.

[0028] Specifically, such as Figures 1 to 3 As shown, both the main body 110 of the fuse segment 102 and the main solder body 210 of the branch fuse 200 can include a fuse fusing portion 1102 and a fuse connecting portion 1104 at each end of the fuse fusing portion 1102. A spare solder pad 120 or a connecting solder pad 220 is provided in the fuse connecting portion 1104, and the width of the fuse connecting portion 1104 is greater than the width of the fuse fusing portion 1102. Two adjacent fuse segments 102 are connected into one unit through two fuse connecting portions 1104, so that multiple fuse segments 102 form a single fuse body 100. Furthermore, by setting the width of the fuse connection portion 1104 to be greater than the width of the fuse fusing portion 1102, when a large current flows through the fuse segment 102, the fuse connection portion 1104 will be melted first, without burning the fuse connection portion 1104 and its spare pad 120 or connecting pad 220. This will not affect the subsequent soldering of the branch fuse 200 to the melted fuse segment 102 through the spare pad 120 and connecting pad 220 to replace the melted fuse segment 102.

[0029] Furthermore, by making the main body 110 of the fuse segment 102 and the main welding body 210 of the branch fuse 200 both include a fuse fusing portion 1102 and a fuse connecting portion 1104, their structures are similar, facilitating welding replacement. Further, the length and width values ​​of the fuse fusing portion 1102 of the main body 110 of the fuse segment 102 correspond one-to-one with the length and width values ​​of the fuse fusing portion 1102 of the main welding body 210 of the branch fuse 200; moreover, the length and width values ​​of the fuse connecting portion 1104 of the main body 110 also correspond one-to-one with the length and width values ​​of the fuse connecting portion 1104 of the main welding body 210. In this way, the shape and size of the fuse segment 102 are consistent with the shape and size of the branch fuse 200, which not only facilitates welding replacement of the fuse segment 102 with the branch fuse 200 but also does not affect the overall performance of the fuse body 100.

[0030] Furthermore, the length E of the spare pads 120 provided at both ends of the main body 110 of the fuse segment 102 can be greater than the length I of the connecting pads 220 provided at both ends of the main welding body 210 of the branch fuse 200, and the width F of the spare pads 120 can be greater than the width J of the connecting pads 220. This allows the connecting pads 220 of the branch fuse 200 to be smaller than the size of the spare pads 120 of the fuse segment 102, ensuring that the connecting pads 220 and spare pads 120 are fully soldered together reliably. Moreover, since both the width of the spare pads 120 and the width of the connecting pads 220 can be greater than the width of the fuse fusing portion 1102, they will not melt when a large current flows. Additionally, each end of the connecting pad 220 can have a solder via 2142, which penetrates the connecting pad 220, and the diameter H of the solder via 2142 is half the width I of the connecting pad 220. When soldering the connecting pad 220 and the spare pad 120, the connecting pad 220 is positioned above the spare pad 120, and solder is applied from the upper surface of the connecting pad 220. After being heated, the solder flows from the upper surface of the connecting pad 220 to the lower surface of the connecting pad 220 through the solder via 2142, and connects with the spare pad 120 corresponding to the lower surface of the connecting pad 220, thereby reliably soldering the branch fuse 200 between the spare pads 120 at both ends of the fuse segment 102.

[0031] Furthermore, when the fuse connection portion 1104 of the fuse segment 102 of the fuse body 100 extends horizontally, the fuse breaking portion 1102 is bent relative to the fuse connection portion 1104. This allows the fuse segment 102 to be bent at an angle, rather than being a straight structure, increasing the length of the fuse breaking portion 1102 and enhancing its protective performance (making it easier to melt the fuse breaking portion 1102 rather than the fuse connection portion 1104 when a large current passes through). Moreover, the bending angle of the fuse breaking portion 1102 relative to the fuse connection portion 1104 is α, and α ranges from 15° to 165°. Additionally, two adjacent fuse segments 102 can be arranged in a V-shape, making the overall shape of the fuse body 100 wavy or serrated, reducing its space occupation in the length direction.

[0032] Furthermore, on two adjacent fuse segments 102, two adjacent fuse connection portions 1104 are connected as a single unit, and the spare solder pads 120 on the two adjacent fuse connection portions 1104 are spaced apart. By connecting the fuse connection portions 1104 of two adjacent fuse segments 102 as a single unit, the fuse body 100 formed by multiple fuse segments 102 is thus formed as a single unit. Moreover, by spaced apart the spare solder pads 120 on the two adjacent fuse connection portions 1104 of the two adjacent fuse bodies 100, subsequent soldering of branch fuses 200 is facilitated. Furthermore, the spacing between the spare solder pads 120 on the two adjacent fuse connection portions 1104 is G, and G > 1 mm.

[0033] Furthermore, given that the width of the fuse-breaking portion 1102 of the main body 110 of the fuse segment 102 is W, the length of the fuse-breaking portion 1102 in the horizontal direction is Z, and the length of the fuse connection portion 1104 of the main body 110 is 0.5X and the width is Y, the following relationship exists: 1.5Z ≥ X ≥ 0.5Z, Y ≥ 5 W; This allows the width Y of the fuse connection portion 1104 of the main body 110 of the fuse segment 102 to be greater than or equal to five times the width W of the fuse fusing portion 1102; and allows the length X of two adjacent fuse connection portions 1104 of two adjacent fuse segments 102 to be between 0.5 and 1.5 times the horizontal length Z of the fuse fusing portion 1102. By reasonably setting the dimensions of the fuse fusing portion 1102 and the fuse connection portion 1104 of the main body 110 of the fuse segment 102, it achieves good fusing protection performance.

[0034] In addition, such as Figure 6As shown, the main body 110 of the fuse segment 102 may include a first substrate layer 112, a first copper layer 114 disposed on the first substrate layer 112, and a first cover layer 116 disposed on the first copper layer 114. The first cover layer 116 has a first opening 118, and a spare solder pad 120 is disposed at the first opening 118. This allows the fuse segment 102 to be configured in a circuit board structure, making it less prone to catching fire or producing smoke when it melts. Furthermore, the width of the first copper layer 114 of the fuse connection portion 1104 of the fuse segment 102 is correspondingly greater than the width of the first copper layer 114 of the fuse breaking portion 1102.

[0035] Furthermore, the first copper layer 114 may include a first copper sheet, and both the first substrate layer 112 and the first cover layer 116 may include a first polyimide layer 1124 disposed on one side of the first copper sheet via a first adhesive layer 1122. This means that a first adhesive layer 1122 formed with adhesive and a first polyimide layer 1124 disposed on the first adhesive layer 1122 are provided on both the upper and lower sides of the first copper sheet, providing insulation and protection for the first copper sheet. Moreover, the first opening 118 penetrates the first adhesive layer 1122 and the first polyimide layer 1124 of the first cover layer 116, exposing a portion of the upper side of the first copper sheet for easier soldering.

[0036] like Figure 7 As shown, the main solder body 210 of the branch fuse 200 includes a second bottom cover layer 212, a second copper layer 214 disposed on the second bottom cover layer 212, and a second top cover layer 216 disposed on the second copper layer 214. Similarly, the branch fuse 200 can also be configured in the structure of a circuit board to prevent it from catching fire or producing smoke when it blows. Similarly, the width of the second copper layer 214 of the fuse connection portion 1104 of the branch fuse 200 is greater than the width of the second copper layer 214 of the fuse breaking portion 1102.

[0037] Furthermore, the second bottom cover layer 212 is provided with a second bottom opening 213, and the second top cover layer 216 is provided with a second top opening 218 corresponding to the second bottom opening 213. The connecting pad 220 is located at the second top opening 218 on the upper side of the second copper layer 214 and the second bottom opening 213 on the lower side of the second copper layer 214. The second bottom opening 213 of the main solder body 210 can correspond vertically to the first opening 118 of the main body 110, so that the lower side of the connecting pad 220 corresponds to the upper side of the spare pad 120. Furthermore, the second copper layer 214 has a through hole 2142 between the second bottom opening 213 and the second top opening 218, so that the solder at the second top opening 218 can flow through the through hole 2142 to the second bottom opening 213 after heating, and then flow through the second bottom opening 213 to the first opening 118 of the corresponding main body 110, which facilitates the soldering of the connecting pad 220 and the spare pad 120.

[0038] Furthermore, the second copper layer 214 may include a second copper sheet, and both the second bottom cover layer 212 and the second top cover layer 216 may include a second polyimide layer 2124 disposed on one side of the second copper sheet via a second adhesive layer 2122. This means that a second adhesive layer 2122 formed with adhesive and a second polyimide layer 2124 disposed on the second adhesive layer 2122 are provided on both the upper and lower sides of the second copper sheet to provide insulation and protection for the second copper sheet. Furthermore, the second bottom opening 213 penetrates the second adhesive layer 2122 and the second polyimide layer 2124 of the second bottom cover layer 212 to expose the lower side portion of the second copper sheet, and the second top opening 218 penetrates the second adhesive layer 2122 and the second polyimide layer 2124 of the second top cover layer 216 to expose the upper side portion of the second copper sheet. One end of the through hole 2142 penetrates the exposed portion of the upper side of the second copper sheet, and the other end penetrates the exposed portion of the lower side of the second copper sheet, so that solder can flow from the upper side of the second copper sheet to its lower side for connection and soldering with the spare solder pad 120.

[0039] In addition, such as Figures 1 to 2 As shown, the fuse structure 10 may include a connecting wire 104 at each end of the fuse body 100, which can electrically connect the fuse structure 10 to the circuit on the temperature acquisition circuit board. Further, the connecting wire 104 may include a main wire 1042 and a spare pad 120 at the wire connection end of the main wire 1042. The wire connection end of the main wire 1042 is integrally formed with the end of the main body 110 of a fuse segment 102 on the fuse body 100 (i.e., the fuse connection portion 1104). This allows the structure of the connecting wire 104 to be similar to the structure of the fuse segment 102, and it can also be replaced when the fuse segment burns out.

[0040] Fuse products can be manufactured using standard circuit board production processes. Each of the spare pads 120 (or connecting pads 220) on the fuse product needs to be cut open, and a spare pad 120 (or connecting pad 220) should be placed at each open position. Then, tin can be pre-applied to each spare pad 120 (or connecting pad 220) before reflow oven operation. Next, adhesive should be applied to each pre-tinned spare pad 120 (or connecting pad 220), using UV adhesive (i.e., shadowless adhesive, photosensitive adhesive, ultraviolet light curing adhesive, a type of adhesive that must be cured by ultraviolet light) to seal and isolate the pre-tinned area. Figures 4 to 5As shown, when a fuse segment 102 of the fuse structure 10 burns out, the adhesive on the pre-tinned portion of the spare pad 120 (or connecting pad 220) can be peeled off by heating (at 80°C) with UV adhesive. After peeling, the connecting pad 220 of the branch fuse 200 is aligned with the spare pad 120 of the burned fuse segment 102. The branch fuse 200 is then welded to the fuse body 100 using a hot air gun or laser welding. After welding, UV adhesive is applied for curing and sealing. The welded branch fuse 200 is reconnected to the original burned fuse body 100, thus enabling the fuse structure 10 to be used multiple times. In this way, the fuse structure 10 can be burned out within the required time, and no open flame or smoke will occur during the burning process, allowing the fuse structure 10 to be reused.

[0041] Furthermore, this utility model also proposes a temperature acquisition circuit board, including a main circuit board and a fuse structure 10 as described above disposed on the main circuit board. With the aforementioned fuse structure 10, if a segment 102 of the fuse structure 10 blows, the temperature acquisition circuit board does not need to replace the entire fuse structure 10 or even the entire temperature acquisition circuit board. Simply soldering a branch fuse 200 to the blown fuse segment 102 restores the function of the temperature acquisition circuit board, simplifying maintenance and reducing costs.

[0042] Furthermore, this utility model also proposes a new energy battery pack, including a battery pack body and a temperature acquisition circuit board as described above disposed on the battery pack body. With the aforementioned fuse structure 10, after a section 102 of the fuse structure 10 blows, the new energy battery pack can be disassembled and a branch fuse 200 simply soldered to the blown location to restore its function. This simplifies the maintenance of the new energy battery pack and significantly reduces usage and maintenance costs.

[0043] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A fuse structure (10), characterized in that, It includes a fuse body (100) for mounting on a temperature acquisition circuit board, and a branch fuse (200) for use in conjunction with the fuse body (100). The fuse body (100) includes at least two fuse segments (102) connected in sequence; each fuse segment (102) includes a main body (110) and a spare pad (120) at each end of the main body (110). The branch fuse (200) includes a main welded body (210) and a connecting pad (220) at each end of the main welded body (210). When a section of the fuse segment (102) of the fuse body (100) melts, the branch fuse (200) is used to be soldered to the two spare pads (120) of the melted fuse segment (102) via the connecting pads (220) at both ends of the branch fuse.

2. The fuse structure (10) according to claim 1, characterized in that, The main body (110) includes a first substrate layer (112), a first copper layer (114) disposed on the first substrate layer (112), and a first cover layer (116) disposed on the first copper layer (114). The first cover layer (116) is provided with a first opening (118), and the spare pad (120) is disposed at the first opening (118).

3. The fuse structure (10) according to claim 2, characterized in that, The first copper layer (114) includes a first copper sheet, and the first substrate layer (112) and the first cover layer (116) both include a first polyimide layer (1124) disposed on one side of the first copper sheet through a first adhesive layer (1122).

4. The fuse structure (10) according to claim 1, characterized in that, The main solder body (210) includes a second bottom cover layer (212), a second copper layer (214) disposed on the second bottom cover layer (212), and a second top cover layer (216) disposed on the second copper layer (214). The second bottom cover layer (212) is provided with a second bottom opening (213), and the second top cover layer (216) is provided with a second top opening (218) corresponding to the second bottom opening (213) above and below. The connecting pad (220) is disposed at the second bottom opening (213) and the second top opening (218). The second copper layer (214) is provided with a through hole (2142) between the second bottom opening (213) and the second top opening (218).

5. The fuse structure (10) according to any one of claims 1-4, characterized in that, Both the main body (110) and the main welding body (210) include a fuse breaking part (1102) and a fuse connecting part (1104) at each end of the fuse breaking part (1102). The spare pad (120) or the connecting pad (220) is provided on the fuse connecting part (1104), and the width of the fuse connecting part (1104) is greater than the width of the fuse breaking part (1102).

6. The fuse structure (10) according to claim 5, characterized in that, The length and width values ​​of the fuse-breaking portion (1102) of the main body (110) correspond one-to-one with the length and width values ​​of the fuse-breaking portion (1102) of the main welded body (210). The length and width values ​​of the fuse connection part (1104) of the main body (110) correspond one-to-one with the length and width values ​​of the fuse connection part (1104) of the main welded body (210).

7. The fuse structure (10) according to claim 5, characterized in that, The length of the spare pad (120) is greater than the length of the connecting pad (220), and the width of the spare pad (120) is greater than the width of the connecting pad (220). Each end of the connecting pad (220) is provided with a solder via (2142), and the diameter of the solder via (2142) is half the width of the connecting pad (220).

8. The fuse structure (10) according to claim 5, characterized in that, On two adjacent fuse segments (102), two adjacent fuse connection portions (1104) are connected as one unit, and the spare pads (120) on the two adjacent fuse connection portions (1104) are spaced apart.

9. The fuse structure (10) according to claim 5, characterized in that, When the fuse connection part (1104) is arranged to extend horizontally, the fuse breaking part (1102) is bent relative to the fuse connection part (1104).

10. The fuse structure (10) according to claim 9, characterized in that, The fuse fusing portion (1102) has a width of W, a horizontal length of Z, and a length of 0.5X and a width of Y for the fuse connecting portion (1104). The following relationship exists: 1.5Z ≥ X ≥ 0.5Z, Y ≥ 5 W; The bending angle of the fuse fuse section (1102) relative to the fuse connection section (1104) is α, and the range of α is 15°~165°.

11. The fuse structure (10) according to claim 1, characterized in that, The fuse structure (10) includes a connecting wire (104) at each end of the fuse body (100). The connecting wire (104) includes a main wire (1042) and a spare pad (120) provided at the wire connection end of the main wire (1042). The wire connection end of the main wire (1042) is integrally disposed with the end of the main body (110) of a section of the fuse segment (102) on the fuse body (100).

12. A temperature acquisition circuit board, characterized in that, include: Main circuit board; as well as, The fuse structure (10) as described in any one of claims 1-11 is disposed on the main circuit board.

13. A new energy battery pack, characterized in that, include: Battery pack body; as well as, The temperature acquisition circuit board as described in claim 12 is disposed on the battery pack body.

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