Battery connecting bar

Abstract

The invention provides a battery connecting bar, which comprises a conductive substrate, a fusible body and a hot cutter, and is characterized in that the conductive substrate is provided with a connecting end connected with a battery monomer; the fusible body has a working state of being connected with the conductive substrate, and has a molten state of being at least partially molten when the temperature exceeds a first temperature threshold value, so that the fusible body is separated from the conductive substrate; the hot cutter is connected with the conductive substrate, a blade part of the hot cutter is arranged towards the fusible body, the hot cutter has an initial position at which the blade part and the fusible body are spaced by a preset distance, and the hot cutter has a deformation state that the blade part moves towards the fusible body when the temperature exceeds a second temperature threshold value, so that the blade part cuts the fusible body and the conductive substrate apart. The battery connection bar structure can be quickly and reliably disconnected when the temperature changes, thermal runaway diffusion is effectively prevented, the thermal runaway condition is avoided, and the stability and the safety of a battery system are guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of battery safety technology, and in particular to a battery connection bar. Background Art

[0002] In recent years, safety accidents caused by thermal runaway of lithium-ion batteries have occurred frequently in energy storage applications in various fields, and some have even caused significant loss of life and property. When a cell in a battery pack or battery system experiences thermal runaway, it often transfers high temperature to adjacent cells, causing thermal runaway, which continues to spread and eventually causes the entire battery pack or system to catch fire and explode. At present, in order to slow down the spread of possible thermal runaway, preventive measures are taken to fill flame-retardant insulation media between adjacent cells during the assembly of battery modules or battery packs, and even fire-fighting facilities are deployed in some large battery systems. However, the cells in the battery pack are connected by excellent conductors, which also provide good heat transfer channels between cells. This means that once a cell experiences thermal runaway, the thermal runaway diffusion channel is still unobstructed. Placing thermal insulation materials between cells alone cannot effectively block the spread of thermal runaway. Therefore, it is also necessary to quickly cut off the connection row of the accident cell when thermal runaway occurs in order to cut off its extended thermal diffusion channel, which requires anti-thermal runaway diffusion connection rows to achieve this. Summary of the invention

[0003] The main purpose of the present invention is to provide a battery connection bar to solve the problem that the traditional connection bar in the prior art has large connection loss in the event of thermal runaway and cannot effectively prevent the spread of thermal runaway.

[0004] In order to achieve the above-mentioned object, according to one aspect of the present invention, a battery connection row is provided, which comprises: a conductive substrate, the conductive substrate having a connection end connected to a battery cell; a fusible body, the fusible body having a working state connected to the conductive substrate, and the fusible body having a molten state of at least partially melting when the temperature exceeds a first temperature threshold, so that the fusible body is disconnected from the conductive substrate; a hot cutter, the hot cutter is connected to the conductive substrate, the blade of the hot cutter is arranged toward the fusible body, the hot cutter has an initial position where the blade is spaced a preset distance from the fusible body, and the hot cutter has a deformation state in which the blade moves toward the fusible body when the temperature exceeds a second temperature threshold, so that the blade cuts the fusible body and the conductive substrate.

[0005] Furthermore, there are two conductive substrates, both of which have connecting ends, and the two conductive substrates are connected to different battery cells through the corresponding connecting ends. The fusible element is arranged between the two conductive substrates, and the fusible element is connected to both conductive substrates.

[0006] Furthermore, a receiving portion is provided on one side of the two conductive substrates facing the fusible body, a first end of the fusible body is connected to the receiving portion formed by one conductive substrate, and a second end of the fusible body is connected to the receiving portion formed by the other conductive substrate.

[0007] Furthermore, the fusible body and the accommodation portion are connected by a hot pressing process.

[0008] Furthermore, at least one conductive substrate comprises: a plurality of conductive metal layers, the conductive substrate is obtained by laminating the plurality of conductive metal layers along the thickness direction of the conductive substrate, and the conductive metal layers are conductive metal foils.

[0009] Furthermore, openings are formed on one side of the plurality of conductive metal layers facing the fusible body, and the openings form a receiving portion.

[0010] Furthermore, there are two hot cutting knives, which are respectively connected to the two conductive substrates, and the blade of one hot cutting knife is arranged toward the first end of the fusible body, and the blade of the other hot cutting knife is arranged toward the second end of the fusible body.

[0011] Furthermore, the hot cutter includes: a first metal layer, the first metal layer is connected to the conductive substrate; a second metal layer, the second metal layer is arranged on a side of the first metal layer away from the conductive substrate, the second metal layer is connected to the first metal layer, and a blade is arranged at the end of the second metal layer facing the fusible body; wherein the thermal expansion coefficient of the second metal layer is greater than the thermal expansion coefficient of the first metal layer, so that when the hot cutter is heated, the end of the second metal layer is deformed toward the first metal layer, thereby driving the blade to move toward the fusible body.

[0012] Furthermore, the battery connecting row also includes a shell having a receiving cavity therein, and the fusible body and at least a part of the conductive matrix are located in the receiving cavity.

[0013] Furthermore, quartz sand is arranged in the accommodating cavity, and the quartz sand is used to be mixed into the fusible body when the fusible body is in a molten state to accelerate the splitting of the fusible body.

[0014] Further, the shell comprises a first shell and a second shell arranged opposite to the first shell, the first shell and the second shell form a containing cavity, and a sand injection hole is arranged on the first shell and one of the first shells.

[0015] According to another aspect of the present invention, a battery is provided, comprising a battery connection bar, wherein the battery connection bar is the battery connection bar mentioned above.

[0016] According to another aspect of the present invention, a vehicle is provided, comprising a battery, wherein the battery is the battery described above.

[0017] Applying the technical solution of the present invention, the battery connection row structure includes: a conductive substrate, a fusible body and a hot cutter. The conductive substrate is used to connect battery cells. The fusible body is connected to the conductive substrate. When the temperature exceeds the set first temperature threshold, the fusible body will partially melt, thereby disconnecting from the conductive substrate to avoid thermal runaway. The hot cutter is connected to the conductive substrate, and its blade is facing the fusible body. When the hot cutter is in the initial position, a preset distance is set between the blade and the fusible body. When the temperature exceeds the set second temperature threshold, the hot cutter is deformed, so that the blade moves toward the fusible body, and the fusible body is cut off from the conductive substrate. The above-mentioned battery connection row structure can quickly and reliably disconnect when the temperature changes, effectively preventing the spread of thermal runaway, avoiding the occurrence of thermal runaway, and ensuring the stability and safety of the battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 A schematic structural diagram of an embodiment of a composite connection row composed of a matrix and a melt according to the present invention is shown;

[0020] Figure 2 A schematic structural diagram of an embodiment of a connecting row complex according to the present invention is shown;

[0021] Figure 3 A schematic structural diagram of an embodiment of a hot cutting knife according to the present invention is shown;

[0022] Figure 4 A schematic structural diagram of an embodiment of a hot cutting knife according to the present invention is shown;

[0023] Figure 5 A schematic structural diagram of an embodiment of a hot cutting knife according to the present invention is shown;

[0024] Figure 6 A schematic structural diagram of an embodiment of a hot cutting knife according to the present invention is shown;

[0025] Figure 7 A schematic structural diagram of an embodiment of a connecting row complex and a hot cutting knife according to the present invention is shown;

[0026] Figure 8 A schematic structural diagram of an embodiment of a connecting row complex according to the present invention is shown;

[0027] Fig. 9 A schematic diagram of the structure of the connection row complex and the shell according to the present invention is shown.

[0028] The above drawings include the following reference numerals:

[0029] 10. conductive substrate; 11. receiving portion; 12. conductive metal layer;

[0030] 20. Fusible;

[0031] 30. hot cutter; 31. blade; 32. first metal layer; 33. second metal layer;

[0032] 40. Shell; 41. Sand injection hole. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application 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 terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0036] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0037] Combination Figures 1 to 9As shown, according to a specific embodiment of the present application, a battery connection row is provided.

[0038] Specifically, in order to achieve the above-mentioned purpose, according to one aspect of the present invention, a battery connection row is provided. It includes: a conductive substrate 10, a fusible body 20 and a hot cutter 30, wherein the conductive substrate 10 has a connection end connected to a battery cell. The fusible body 20 has a working state connected to the conductive substrate 10, and the fusible body 20 has a molten state in which it is at least partially melted when the temperature exceeds a first temperature threshold, so that the fusible body 20 is disconnected from the conductive substrate 10. The hot cutter 30 is connected to the conductive substrate 10, and the blade 31 of the hot cutter 30 is arranged toward the fusible body 20, and the hot cutter 30 has an initial position in which the blade 31 is spaced a preset distance from the fusible body 20, and the hot cutter 30 has a deformation state in which the blade 31 moves toward the fusible body 20 when the temperature exceeds a second temperature threshold, so that the blade 31 cuts the fusible body 20 from the conductive substrate 10.

[0039] In an embodiment of the present application, the battery connection row structure includes: a conductive substrate 10, a fusible body 20 and a hot cutter 30. The conductive substrate 10 is used to connect battery cells. The fusible body 20 is connected to the conductive substrate. When the temperature exceeds the set first temperature threshold, the fusible body 20 will partially melt, thereby disconnecting from the conductive substrate 10 to avoid thermal runaway. The hot cutter 30 is connected to the conductive substrate 10, and its blade 31 faces the fusible body 20. When the hot cutter 30 is in the initial position, a preset distance is set between the blade 31 and the fusible body 20. When the temperature exceeds the set second temperature threshold, the hot cutter 30 is deformed, so that the blade 31 moves toward the fusible body 20, and the fusible body 20 is cut off from the conductive substrate 10. The above-mentioned battery connection row structure can quickly and reliably disconnect when the temperature changes, effectively prevent the spread of thermal runaway, avoid the occurrence of thermal runaway, and ensure the stability and safety of the battery system.

[0040] In another embodiment of the present application, there are two conductive substrates 10, both of which have connecting ends. The two conductive substrates 10 are connected to different battery cells through corresponding connecting ends. The fusible element 20 is arranged between the two conductive substrates 10, and the fusible element 20 is connected to both conductive substrates 10.

[0041] Specifically, Figure 1 As shown, there are two conductive substrates 10, each conductive substrate 10 has a connection end, and is connected to different battery cells through the connection end. The fusible body 20 is arranged between the two conductive substrates 10 and connected to the two conductive substrates 10. Such a design can ensure that the connection between the fusible body 20 and the conductive substrate 10 is stable, providing a reliable connection for the battery cells.

[0042] Furthermore, a receiving portion 11 is provided on one side of the two conductive substrates 10 facing the fusible body 20 , a first end of the fusible body 20 is connected to the receiving portion 11 formed by one conductive substrate 10 , and a second end of the fusible body 20 is connected to the receiving portion 11 formed by the other conductive substrate 10 .

[0043] Specifically, Figure 1 As shown, a receiving portion 11 is provided on one side of the two conductive substrates 10, and the head end of the fusible element 20 is connected to the receiving portion 11 of one conductive substrate 10, and the tail end thereof is connected to the receiving portion 11 of the other conductive substrate 10. This design structure can ensure that the fusible element 20 is firmly connected between the two conductive substrates 10, thereby effectively conducting current and realizing a safe cut-off function when necessary, thereby improving the safety and reliability of the battery system.

[0044] Furthermore, the fusible body 20 and the receiving portion 11 are connected by a hot pressing process.

[0045] Specifically, at the connection point, the conductive substrate 10 sandwiches the fusible body 20 in the middle, and then the two are fused by a hot pressing process to obtain a lower connection resistance. The connection row provides a reliable connection with extremely low internal resistance between battery cells. This connection method can ensure a stable connection between the fusible body 20 and the receiving portion 11, and improve the reliability and stability of the connection.

[0046] It should be noted that the fusible body 20 is made of a fusible alloy and has a relatively low melting point, and the fusing temperature can be set by adjusting the metal composition.

[0047] Furthermore, at least one conductive substrate 10 includes: a plurality of conductive metal layers 12 , and the conductive substrate 10 is obtained by laminating the plurality of conductive metal layers 12 along the thickness direction of the conductive substrate 10 , and the conductive metal layers 12 are conductive metal foils.

[0048] Specifically, Figure 2 As shown, a conductive substrate 10 includes a plurality of conductive metal layers 12, which are pressed together along the thickness direction of the conductive substrate 10. These conductive metal layers are usually conductive metal foils. This structural design can increase the conductivity of the conductive substrate 10, making it more durable. By stacking multiple layers of metal foil, the conductive substrate 10 can conduct current more effectively and improve the reliability and stability of the connection. This structural design also helps to reduce internal resistance and improve current transmission efficiency, thereby improving the performance and safety of the battery system.

[0049] Furthermore, the plurality of conductive metal layers 12 are formed with openings on one side facing the fusible body 20, and the openings form the accommodating portion 11. This design enables the conductive metal layer 12 to be connected and fixed to the fusible body 20, provides a stable electrical connection, and ensures the current conduction efficiency and connection reliability. The design of the accommodating portion 11 helps to smoothly install the fusible body 20 on the conductive metal layer 12, thereby achieving effective current transmission and connection functions.

[0050] In another embodiment of the present application, Figure 6 , Figure 7 As shown, there are two heat cutters 30, and the two heat cutters 30 are respectively connected to the two conductive substrates 10, and the blade 31 of one heat cutter 30 is arranged toward the first end of the fusible body 20, and the blade 31 of the other heat cutter 30 is arranged toward the second end of the fusible body 20. This design structure can ensure that the heat cutter 30 can quickly cut the fusible body 20 when necessary, thereby realizing the safety cut-off function in the case of thermal runaway of the battery system, effectively preventing the spread and diffusion of thermal runaway, and improving the safety and stability of the battery system.

[0051] Furthermore, the hot cutter 30 includes: a first metal layer 32, the first metal layer 32 is connected to the conductive substrate 10; a second metal layer 33, the second metal layer 33 is arranged on the side of the first metal layer 32 away from the conductive substrate 10, the second metal layer 33 is connected to the first metal layer 32, and a blade 31 is arranged at the end of the second metal layer 33 facing the fusible body 20; wherein the thermal expansion coefficient of the second metal layer 33 is greater than the thermal expansion coefficient of the first metal layer 32, so that when the hot cutter 30 is heated, the end of the second metal layer 33 is deformed toward the first metal layer 32, thereby driving the blade 31 to move toward the fusible body 20.

[0052] Specifically, Figure 3 , Figure 4 As shown, the hot cutter 30 includes a first metal layer 32 and a second metal layer 33. The first metal layer 32 is connected to the conductive substrate 10, and the second metal layer 33 is located on one side of the first metal layer 32 and connected to the first metal layer 32. A blade 31 is provided at the end of the second metal layer 33, facing the fusible body 20. The thermal expansion coefficient of the second metal layer 33 is greater than the thermal expansion coefficient of the first metal layer 32, so that when heated, the end of the second metal layer 33 will deform, driving the blade 31 to move toward the fusible body 20. This design structure allows the hot cutter 30 to quickly perform cutting action when heated, improving efficiency and accuracy. At the same time, the connection method of the first metal layer 32 ensures that the blade 31 is stably aligned with the fusible body 20, avoiding cutting deviation.

[0053] It needs to be further explained that if Figure 5As shown, the hot cutter 30 is formed by riveting two metal sheets together to form a bimetallic sheet and stamping it, and then the bimetallic sheet is connected to the conductive substrate 10 of the row composite body. The bimetallic sheet can bend toward the fusible body 20 when heated and cut the fusible body 20. The hot cutter 30 is a bimetallic sheet with a T-shaped structure, which is installed at a position close to the fusible body 20. The working principle of the hot cutter 30 is: when the temperature of the connecting row composite body increases, the temperature of the hot cutter 30 increases accordingly, and the bimetallic sheet bends and drives the blade close to the fusible body 20. As the temperature of the connecting row composite body further increases, the fusible body 20 softens, and the hot cutter 30 cuts into the fusible body 20, accelerating the melting and breaking of the fusible body 20. At the same time, the molten liquid of the fusible body 20 is absorbed by the hot cutter 30, so that the breaking distance of the fusible body 20 is enlarged to enhance the heat insulation effect, thereby playing the role of cutting off the arc.

[0054] Furthermore, the battery connection row also includes a shell 40, and the shell 40 has a receiving cavity, and the fusible body 20 and at least a part of the conductive substrate 10 are located in the receiving cavity.

[0055] Specifically, the shell 40 is made of high temperature resistant and flame retardant material, and is located in the middle of the connecting row to cover the fusible body 20, thereby strengthening the structural strength of the connecting row and preventing the contents from leaking out.

[0056] Furthermore, quartz sand is arranged in the accommodation cavity, and the quartz sand is used to be mixed into the fusible body 20 when the fusible body 20 is in a molten state to accelerate the splitting of the fusible body 20 .

[0057] Specifically, by arranging quartz sand in the accommodation cavity, when the fusible body 20 is in a molten state, the quartz sand can be mixed into the fusible body 20, thereby accelerating the splitting process of the fusible body 20. This improves the efficiency of the battery connection row and ensures that the battery connection row can be more stable and reliable when working normally. At the same time, this design can also reduce the splitting time of the fusible body 20, and the mixing process of the quartz sand in the fusible body 20 can be completed more quickly, thereby reducing the time of the entire splitting process and improving production efficiency.

[0058] Further, the housing 40 includes a first housing and a second housing arranged opposite to the first housing, the first housing and the second housing form a containing cavity, and a sand injection hole 41 is arranged on the first housing and one of the first housings.

[0059] Specifically, Fig. 9As shown, a sand injection hole 41 is also provided on the upper shell 40, through which quartz sand can be injected into the gap between the shell 40 and the connecting row complex. When the fusible body 20 melts, the quartz sand is mixed into the fusible body 20 to accelerate the splitting of the fusible body 20, thereby achieving the effect of quickly cutting off the circuit; after the connecting row is filled with quartz sand, the sand injection hole 41 is sealed with a potting glue. By providing the sand injection hole 41 on the shell, quartz sand can be easily injected into the shell 40, and then the quartz sand is injected into the shell 40 to accelerate the splitting of the fusible body 20, thereby achieving the effect of quickly cutting off the circuit and avoiding thermal runaway of the battery. After filling with quartz sand, sealing the sand injection hole 41 with a potting glue can effectively prevent the spread of thermal runaway and improve the safety performance of the battery.

[0060] According to another aspect of the present invention, a battery is provided, comprising a battery connection bar, wherein the battery connection bar is the battery connection bar mentioned above.

[0061] According to another aspect of the present invention, a vehicle includes a battery, wherein the battery connecting bar is the above-mentioned battery.

[0062] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0063] 1. Rivet two metal sheets together to form a bimetallic sheet and stamp it, then fix the bimetallic sheet on the conductive substrate 10 of the composite row. The bimetallic sheet can bend toward the fusible body 20 when heated and cut off the fusible body 20. Install a hot cutter 30 on the connecting row composite body to obtain a connecting row composite body that prevents thermal runaway diffusion. The connecting row composite body is equipped with a shell 40, and quartz sand is filled into the shell 40, and finally the sand injection hole 41 is closed. The preparation of the thermal runaway diffusion-proof battery connecting row can be completed.

[0064] 2. The battery connection row structure includes: a conductive substrate 10, a fusible body 20 and a hot cutter 30. The conductive substrate 10 is used to connect battery cells. The fusible body 20 is connected to the conductive substrate. When the temperature exceeds the set first temperature threshold, the fusible body 20 will partially melt, thereby disconnecting from the conductive substrate 10 to avoid thermal runaway. The hot cutter 30 is connected to the conductive substrate 10, and its blade 31 faces the fusible body 20. When the hot cutter 30 is in the initial position, a preset distance is set between the blade 31 and the fusible body 20. When the temperature exceeds the set second temperature threshold, the hot cutter 30 is deformed, so that the blade 31 moves toward the fusible body 20, and the fusible body 20 is cut off from the conductive substrate 10. The above-mentioned battery connection row structure can quickly and reliably disconnect when the temperature changes, effectively prevent the spread of thermal runaway, avoid the occurrence of thermal runaway, and ensure the stability and safety of the battery system.

[0065] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0066] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention.

[0067] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery connection bar, characterized in that: include: A conductive substrate (10), the conductive substrate (10) having a connection terminal connected to a battery cell; A fusible element (20), wherein the fusible element (20) has a working state connected to the conductive substrate (10), and the fusible element (20) has a molten state in which it is at least partially melted when the temperature exceeds a first temperature threshold, so that the fusible element (20) is disconnected from the conductive substrate (10); A hot cutter (30), the hot cutter (30) being connected to the conductive substrate (10), the blade (31) of the hot cutter (30) being arranged toward the fusible body (20), the hot cutter (30) having an initial position in which the blade (31) and the fusible body (20) are spaced apart by a preset distance, and the hot cutter (30) having a deformation state in which the blade (31) moves toward the fusible body (20) when the temperature exceeds a second temperature threshold, so that the blade (31) cuts the fusible body (20) and the conductive substrate (10) apart.

2. The battery connection bar according to claim 1, characterized in that: There are two conductive substrates (10), each of which has the connection end, and the two conductive substrates (10) are connected to different battery cells via the corresponding connection ends; the fusible element (20) is arranged between the two conductive substrates (10), and the fusible element (20) is connected to both conductive substrates (10).

3. The battery connection bar according to claim 2, characterized in that: A receiving portion (11) is provided on one side of the two conductive substrates (10) facing the fusible body (20); a first end of the fusible body (20) is connected to the receiving portion (11) formed by one of the conductive substrates (10); and a second end of the fusible body (20) is connected to the receiving portion (11) formed by the other of the conductive substrates (10).

4. The battery connection bar according to claim 3, characterized in that: The fusible body (20) and the accommodating portion (11) are connected via a hot pressing process.

5. The battery connection bar according to claim 3, characterized in that: At least one of the conductive substrates (10) comprises: a plurality of conductive metal layers (12); the conductive substrate (10) is obtained by laminating the plurality of conductive metal layers (12) along the thickness direction of the conductive substrate (10); and the conductive metal layers (12) are conductive metal foils.

6. The battery connection bar according to claim 5, characterized in that: The plurality of conductive metal layers (12) are formed with openings on one side facing the fusible body (20), and the openings form the receiving portion (11).

7. The battery connection bar according to claim 2, characterized in that: There are two hot cutting knives (30), and the two hot cutting knives (30) are respectively connected to the two conductive substrates (10), the blade (31) of one hot cutting knife (30) is arranged toward the first end of the fusible body (20), and the blade (31) of the other hot cutting knife (30) is arranged toward the second end of the fusible body (20).

8. The battery connection bar according to claim 1 or 7, characterized in that: The hot cutting knife (30) comprises: A first metal layer (32), the first metal layer (32) being connected to the conductive substrate (10); a second metal layer (33), the second metal layer (33) being arranged on a side of the first metal layer (32) away from the conductive substrate (10), the second metal layer (33) being connected to the first metal layer (32), and the blade portion (31) being arranged at an end of the second metal layer (33) facing the fusible element (20); The thermal expansion coefficient of the second metal layer (33) is greater than the thermal expansion coefficient of the first metal layer (32), so that when the hot cutting knife (30) is heated, the end of the second metal layer (33) is deformed toward the first metal layer (32), thereby driving the blade (31) to move toward the fusible body (20).

9. The battery connection bar according to claim 1, characterized in that: The battery connection row also includes a shell (40), wherein the shell (40) has a receiving cavity, and the fusible body (20) and at least a portion of the conductive substrate (10) are located in the receiving cavity.

10. The battery connection bar according to claim 9, characterized in that: Quartz sand is arranged in the accommodation cavity, and the quartz sand is used to be mixed into the fusible body (20) when the fusible body (20) is in the molten state to accelerate the splitting of the fusible body (20).

11. The battery connection bar according to claim 9, characterized in that: The housing (40) comprises a first housing and a second housing arranged opposite to the first housing, the first housing and the second housing forming the accommodating cavity, and a sand injection hole (41) is arranged on the first housing and one of the first housings.

12. A battery, comprising a battery connection bar, characterized in that: The battery connection bar is the battery connection bar according to any one of claims 1 to 11.

13. A vehicle comprising a battery, characterized in that: The battery is the battery described in claim 12.

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