Battery pack and electric device

Abstract

This utility model discloses a battery pack and an electrical device. The battery pack includes: a battery cell, with an explosion-proof valve disposed at at least one end of the battery cell in a first horizontal direction; a tray on which the battery cell is disposed, and the tray is provided with the battery pack explosion-proof valve; and a busbar assembly disposed on the tray. The busbar assembly includes: a first busbar and a second busbar. The first busbar and the explosion-proof valve are located at the same end of the battery cell in the first horizontal direction and are connected to each other. The second busbar is located at at least one end of the battery cell in a second horizontal direction and is connected to the battery pack explosion-proof valve. The first busbar and the second busbar are connected, and the first horizontal direction and the second horizontal direction are perpendicular to each other. By setting up the busbar assembly, the spray direction of the electrolyte can be changed during the heat diffusion process, realizing thermoelectric separation within the battery pack, thereby protecting the electrical components within the battery pack and greatly improving the safety performance of the battery pack.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a battery pack and electrical equipment. Background Technology

[0002] In related technologies, a battery cell includes a battery cell housing, on which a battery cell explosion-proof valve is provided for releasing the internal air pressure of the battery cell. The side plate of the battery pack is provided with an exhaust channel, and the inlet of the exhaust channel corresponds to the battery cell explosion-proof valve. The outlet of the exhaust channel is connected to a collection space, which is located inside the battery pack cavity. The collection space is provided with a battery pack explosion-proof valve, which can be used to relieve the pressure inside the battery pack.

[0003] However, existing battery packs also have significant drawbacks: they do not have a busbar assembly for the cell explosion-proof valves, leaving the cell explosion-proof valves exposed inside the battery pack. Once the cell explosion-proof valves open, the high-temperature electrolyte will rapidly spread throughout the battery pack, causing irreversible damage to other components inside the battery pack, and may even damage other cells, exacerbating heat diffusion within the battery pack and causing uncontrollable phenomena. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery pack that can achieve thermoelectric separation, which can greatly improve safety performance.

[0005] This utility model further proposes an electrical device.

[0006] The battery pack according to this utility model includes: a battery cell, wherein at least one end of the battery cell in a horizontal first direction is provided with a battery cell explosion-proof valve; a tray, wherein the battery cell is disposed on the tray, and the tray is provided with a battery pack explosion-proof valve; and a busbar assembly, wherein the busbar assembly is disposed on the tray, and the busbar assembly includes: a first busbar and a second busbar, wherein the first busbar and the battery cell explosion-proof valve are located at the same end of the battery cell in the horizontal first direction and are connected to the battery cell explosion-proof valve, the second busbar is located at at least one end of the battery cell in a horizontal second direction and is connected to the battery pack explosion-proof valve, the first busbar and the second busbar are connected, and the horizontal first direction and the horizontal second direction are perpendicular to each other.

[0007] According to the present invention, the battery pack is equipped with a busbar assembly, which can change the spray direction of the electrolyte during the heat diffusion process, thereby achieving thermoelectric separation within the battery pack, protecting the electrical components within the battery pack, and greatly improving the safety performance of the battery pack.

[0008] In some examples of this utility model, a first channel is formed in the first busbar and a second channel is formed in the second busbar, and the first channel and the second channel are connected.

[0009] In some examples of this utility model, the battery pack explosion-proof valve and the second busbar are located at the same end of the battery cell in the second horizontal direction.

[0010] In some examples of this utility model, the battery pack further includes: a fixing member, which is fixed to the tray and located at at least one end of the battery cell in a horizontal second direction; at least one end of the first busbar is fixed to the fixing member; and the second busbar is fixed to the fixing member located at the same end as the battery pack explosion-proof valve.

[0011] In some examples of this utility model, the first busbar is fixed to the fixing member by an adhesive or fastener, and the second busbar is fixed to the fixing member by an adhesive or fastener.

[0012] In some examples of this utility model, the fixing member is provided with a slot, and the second busbar is engaged in the slot.

[0013] In some examples of this utility model, the fixing member is further provided with a snap-fit ​​part corresponding to the slot, and the snap-fit ​​part is snap-fitted into the second busbar.

[0014] In some examples of this utility model, the second busbar is a metal part and the fixing part is a plastic part.

[0015] In some examples of this utility model, along the second horizontal direction, the shape of the projection of the first busbar is C-shaped, circular, rectangular, U-shaped, or L-shaped.

[0016] In some examples of this utility model, there are multiple battery cells, and the first busbar is open on one side facing the battery cell, with the open side covering the battery cell explosion-proof valves of the multiple battery cells; or the first busbar is provided with multiple second through holes on one side facing the battery cell, and the multiple second through holes are provided in a one-to-one correspondence with the battery cell explosion-proof valves of the multiple battery cells.

[0017] In some examples of this utility model, the battery pack further includes: a cover plate, the upper end of the first busbar being open, the cover plate covering the tray, and the cover plate sealingly covering the upper end of the first busbar; and / or the lower end of the first busbar being open, and the bottom plate of the tray sealingly covering the lower end of the first busbar.

[0018] In some examples of this utility model, the first busbar includes an upper plate, a lower plate, and a side plate. The upper plate is connected to the upper end of the side plate and extends toward one side of the battery cell. The lower plate is connected to the lower end of the side plate and extends toward one side of the battery cell.

[0019] In some examples of this utility model, the first busbar further includes: a first latching protrusion and a second latching protrusion, wherein the first latching protrusion is connected to the end of the upper plate away from the side plate and extends downward, and the second latching protrusion is connected to the end of the lower plate away from the side plate and extends upward.

[0020] In some examples of this utility model, a downwardly recessed groove is provided at the connection between the lower plate and the side plate.

[0021] In some examples of this utility model, the first busbar further includes: a first extension plate and a second extension plate, wherein the first extension plate is connected to the lower end of the upper plate away from the side plate and extends toward one side of the battery cell, and the second extension plate is connected to the upper end of the lower plate away from the side plate and extends toward one side of the battery cell.

[0022] In some examples of this utility model, the battery cell is a blade battery cell, which extends along a first horizontal direction.

[0023] In some examples of this utility model, the length direction of the blade cell is consistent with the length direction of the battery pack.

[0024] In some examples of this utility model, the positive and negative terminals of the battery cell are located at opposite ends in a horizontal first direction. In two adjacent battery cells, the positive terminal of one battery cell and the negative terminal of the other battery cell are connected in series at the same end in the horizontal first direction.

[0025] In some examples of this invention, the positive and negative terminals of the battery cell are located at the same end in a first horizontal direction.

[0026] In some examples of this utility model, the cell explosion-proof valve is located above both ends of the cell in a horizontal first direction.

[0027] In some examples of this utility model, the battery pack further includes: a cell group, the cell group comprising: a plurality of cells arranged along a second horizontal direction.

[0028] In some examples of this utility model, the battery pack further includes an explosion-proof beam disposed between two adjacent battery cell groups.

[0029] The electrical equipment according to this utility model includes: the battery pack described above.

[0030] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0031] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0032] Figure 1 This is a schematic diagram of the battery pack structure according to an embodiment of the present utility model;

[0033] Figure 2 This is a schematic diagram of the first part of the battery pack according to an embodiment of the present utility model;

[0034] Figure 3 This is a schematic diagram of the busbar assembly;

[0035] Figure 4 This is a schematic diagram of the second part of the battery pack according to an embodiment of the present utility model;

[0036] Figure 5 This is a schematic diagram of the third part of the battery pack according to an embodiment of the present utility model;

[0037] Figure 6 This is a schematic diagram of the fourth part of the battery pack according to an embodiment of the present utility model;

[0038] Figure 7 This is a schematic diagram of the fifth part of the battery pack according to an embodiment of the present utility model.

[0039] Figure label:

[0040] 1. Battery pack;

[0041] 10. Battery cell; 100. Battery cell explosion-proof valve; 20. Tray; 200. Battery pack explosion-proof valve; 30. Busbar assembly; 300. First busbar; 301. Second busbar; 302. First channel; 303. Second channel; 304. Upper plate; 305. Lower plate; 306. Side plate; 307. First latching protrusion; 308. Second latching protrusion; 309. Groove; 40. Fixing component; 400. Slot; 401. Snap-fit ​​part; 50. Explosion-proof beam; 60. Battery cell assembly. Detailed Implementation

[0042] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0043] The following is for reference. Figures 1-7 The battery pack 1 according to an embodiment of the present utility model is described.

[0044] like Figure 1 and Figure 2 As shown, the battery pack 1 according to an embodiment of the present invention includes: a battery cell 10, a tray 20, and a busbar assembly 30. The battery cell 10 is the core component inside the battery pack 1 and can store electrical energy. The tray 20 can be used to install the battery cell 10 and the busbar assembly 30. The busbar assembly 30 can function as a current collector and is mainly used to release the high-temperature electrolyte released by the battery cell 10.

[0045] like Figures 1-3 , Figure 5 As shown, at least one end of the battery cell 10 in the first horizontal direction is provided with a battery cell explosion-proof valve 100. The battery cell 10 is placed on a tray 20, and the tray 20 is provided with a battery pack explosion-proof valve 200. A busbar assembly 30 is placed on the tray 20, and the busbar assembly 30 includes a first busbar 300 and a second busbar 301. In the first horizontal direction, one end of the battery cell 10 is provided with a battery cell explosion-proof valve 100. Based on the arrangement of the battery cells 10, battery cell explosion-proof valves 100 are provided on both sides of the battery cell group 60. The battery cell explosion-proof valves 100 can be used to ensure the safety of the battery cells 10. The battery cell 10 is placed on the tray 20, and the tray 20 can support the battery cells 10. At this time, the upper space of the tray 20 can be used reasonably to reduce the space occupation, thereby solving the space arrangement problem of the battery pack 1. The tray 20 is provided with a battery pack explosion-proof valve 200, and the battery pack explosion-proof valve 201 can be the main explosion-proof valve of the battery pack 1. To ensure the safety of battery pack 1, the busbar assembly 30 is mounted on tray 20, which supports the busbar assembly 30. This allows for efficient use of the upper space of tray 20, reducing space occupancy and thus solving the space arrangement problem of battery pack 1. The first busbar 300 and the second busbar 301 are components of the busbar assembly 30. When the interior of the tray side beam is unsuitable for setting up a channel, the second busbar 301 can be installed. Both the first and second busbars 300 and 301 can serve as confluencers, used to release the high-temperature electrolyte released by the battery cell 10. The second busbar 301 can be designed as a square tube to ensure smooth venting and electrolyte drainage within battery pack 1 during thermal diffusion.

[0046] The first busbar 300 and the cell explosion-proof valve 100 are located at the same end of the cell 10 in the first horizontal direction, and the first busbar 300 is connected to the cell explosion-proof valve 100. The second busbar 301 is located at at least one end of the cell 10 in the second horizontal direction, and the second busbar 301 is connected to the battery pack explosion-proof valve 200. The first busbar 300 and the second busbar 301 are connected, and the first horizontal direction and the second horizontal direction are perpendicular to each other. It should be noted that the first busbar 300 and the cell explosion-proof valve 100 are located at the same end of the cell 10 in the first horizontal direction. That is, the first busbar 300 is connected to the cell explosion-proof valve 100. At this time, the first busbar 300 can be used to release the high-temperature electrolyte released by the cell 10. The second busbar 301 is located at at least one end of the cell 10 in the second horizontal direction. In the second horizontal direction, one or both ends of the cell 10 can be provided with the second busbar 301, and the second busbar 301 is connected to the battery pack explosion-proof valve 200. The first busbar 300 and the second busbar 301 are connected. That is to say, the cell explosion-proof valve 100, the first busbar 300, and the second busbar 301 are connected. The second busbar 301 and the battery pack explosion-proof valve 200 are connected. This allows the high-temperature electrolyte gas and liquid ejected from the battery pack 1 to be blocked by the busbar 30 when the cell explosion-proof valve 100 is opened due to puncture, collision, compression, or short circuit. This changes the disordered diffusion of the electrolyte within the battery pack 1, ensuring the electrolyte spray follows a preset path. The high-temperature electrolyte released from the cell 10 flows through the first busbar 300, then the second busbar 301, and finally exits through the battery pack explosion-proof valve 200. This achieves thermoelectric separation within the battery pack 1, protecting the electrical components and significantly improving its safety performance. The first horizontal direction and the second horizontal direction are perpendicular to each other. It should be noted that the battery pack 1 contains many components and has limited internal space; designing the first busbar 300 near each cell explosion-proof valve 200 effectively utilizes the remaining space.

[0047] Therefore, by setting up the busbar assembly 30, the direction of electrolyte spraying can be changed during the heat diffusion process, thereby achieving thermoelectric separation within the battery pack 1, which can protect the electrical components within the battery pack 1 and greatly improve the safety performance of the battery pack 1.

[0048] Optionally, such as Figure 2As shown, a first channel 302 is formed in the first busbar 300, and a second channel 303 is formed in the second busbar 301. The first channel 302 and the second channel 303 are connected. The first channel 302 and the second channel 303 can be used to flow electrolyte. The first channel 302 and the second channel 303 are connected, so that when the cell explosion-proof valve 100 in the battery pack 1 is opened due to puncture, collision, squeezing, short circuit, etc., the ejected high-temperature electrolyte gas and liquid can be blocked by the busbar 30. This can change the disordered diffusion state of the electrolyte in the battery pack 1 and realize that the electrolyte spray path is carried out according to the preset path. The high-temperature electrolyte released by the cell 10 flows through the first channel 302, passes through the second channel 303, and is finally discharged through the battery pack explosion-proof valve 200. This can realize the thermoelectric separation in the battery pack 1, thereby protecting the electrical components in the battery pack 1 and greatly improving the safety performance of the battery pack 1.

[0049] It should be noted that, as Figure 2 As shown, the battery pack explosion-proof valve 200 and the second busbar 301 are located at the same end of the battery cell 10 in the second horizontal direction. This allows the battery pack explosion-proof valve 200 to connect with the second busbar 301, and the battery pack explosion-proof valve 200 can discharge electrolyte gas and liquid flowing through the second busbar 301, thereby protecting the electrical components inside the battery pack 1 and greatly improving the safety performance of the battery pack 1.

[0050] Specifically, such as Figure 1 and Figure 4As shown, the battery pack 1 also includes: a fixing member 40, which is fixed on the tray 20 and located at at least one end of the cell 10 in the second horizontal direction; at least one end of the first busbar 300 is fixed on the fixing member 40; and the second busbar 301 is fixed on the fixing member 40 at the same end as the battery pack explosion-proof valve 200. The fixing member 40 serves as a connection and is fixed to the tray 20. The tray 20 provides support for the fixing member 40, thus making efficient use of the upper space of the tray 20 and reducing space occupation, thereby solving the space arrangement problem of the battery pack 1. The fixing member 40 is located at least one end of the battery cell 10 in the second horizontal direction. In the second horizontal direction, the fixing member 40 can be located at one or both ends of the battery cell 10. At least one end of the first busbar 300 is fixed to the fixing member 40. One or both ends of the first busbar 300 can be fixed to the fixing member 40. When the fixing member 40 is located at one end of the battery cell 10, one end of the first busbar 300 is fixed to the fixing member 40. When the battery cell 10 is at both ends, both ends of the first busbar 300 can be fixed to the fixing member 40. The fixing member 40 can fix the first busbar 300, which is convenient for the installation and setting of the first busbar 300. The second busbar 301 is fixed to the fixing member 40 at the same end as the battery pack explosion-proof valve 200. At this time, the second busbar 301 can be connected to the battery pack explosion-proof valve 200. In this way, the battery pack explosion-proof valve 200 can discharge the electrolyte gas and liquid flowing through the second busbar 301, thereby protecting the electrical components in the battery pack 1 and greatly improving the safety performance of the battery pack 1. The fixing member 40 can fix the second busbar 301, which is convenient for the installation and setting of the second busbar 301.

[0051] Among them, such as Figure 1 , Figure 4 and Figure 6As shown, the first busbar 300 and the second busbar 301 are both fixed to the fixing member 40 using adhesives or fasteners. Both the first busbar 300 and the second busbar 301 can be fixed to the fixing member 40 using either adhesives or fasteners. When the first busbar 300 and the second busbar 301 are fixed to the fixing member 40 using adhesives, stress can be evenly distributed, and excellent sealing and corrosion resistance are provided. The process is simple. When the first busbar 300 and the second busbar 301 are fixed to the fixing member 40 using fasteners, installation is convenient, disassembly is easy, practicality is high, and the structure is reliable. The first busbar 300 and the second busbar 301 can be disassembled and replaced easily, thus saving maintenance costs. Therefore, the most suitable connection method can be selected according to the specific application scenario and requirements. The adhesive can be glue, the fixing member can be screws, and the first busbar 300 can be fixed to other components. It should be noted that the first busbar 300 can also be fixed to the fastener 40 by means of a snap fastener.

[0052] Specifically, such as Figure 6 As shown, the fixing member 40 is provided with a slot 400, and the second busbar 301 is snapped into the slot 400. The slot 400 can be used to fix other components. When the second busbar 301 is snapped into the slot 400, the space of the fixing member 40 can be used reasonably, reducing space occupation. The second busbar 301 can be fixed to the fixing member 40, thereby solving the space arrangement problem of the battery pack 1. Secondly, the second busbar 301 being snapped into the slot 400 can increase the structural stability of the entire assembly and prevent the second busbar 301 from shifting due to vibration or other external forces, thereby ensuring that it maintains the correct positioning throughout the use. In addition, the slot design makes the installation of the second busbar 301 simpler and faster, reducing complex assembly steps, thereby improving production efficiency and reducing quality problems caused by human error.

[0053] In addition, such as Figure 6 and Figure 7 As shown, the fixing member 40 is also provided with a snap-fit ​​part 401 at the corresponding slot 400, and the snap-fit ​​part 401 engages with the second busbar 301. The snap-fit ​​part 401 can play a snap-fit ​​role. The addition of the snap-fit ​​part 401 at the corresponding slot 400 of the fixing member 40 can improve the snap-fit ​​support stability of the fixing member 40. The snap-fit ​​part 401 engages with the second busbar 301, making the snap-fit ​​connection simpler and more convenient, and ensuring a firm and reliable connection between the fixing member 40 and the second busbar 301, thus fixing the second busbar 301 to the fixing member 40. The snap-fit ​​part 401 can be configured as a buckle.

[0054] Of course, such as Figure 1 As shown, the second busbar 301 is a metal part, and the fixing part 40 is a plastic part. Metal parts have advantages such as high strength, good durability, and strong machinability, while plastic parts have advantages such as light weight, good corrosion resistance, and low cost. Setting the second busbar 301 as a metal part and the fixing part 40 as a plastic part is more in line with actual working conditions. Setting the second busbar 301 as a metal part can prevent the battery cell 10 from being crushed after expansion during thermal diffusion. It should be noted that the second busbar 301 is preferably located at one end of the battery cell 10 in the second horizontal direction. This way, when a high-voltage connector such as a long aluminum busbar is set on the other side of the battery cell 10, sufficient safety distance can be ensured both above and below, and sufficient distance can also be ensured between the second busbar 301 and the long aluminum busbar.

[0055] Furthermore, such as Figures 1-5 As shown, along the second horizontal direction, the projected shape of the first busbar 300 can be C-shaped, circular, rectangular, U-shaped, or L-shaped. Setting the projected shape of the first busbar 300 to C-shaped allows it to intercept the electrolyte during thermal diffusion. A circular design provides a more uniform distribution, facilitating effective contact and guidance of the high-temperature electrolyte flow in all directions. A rectangular design provides a larger surface area, allowing for wider contact and guidance of the high-temperature electrolyte. A U-shaped design can surround one or more sides of the battery cell 10 to a certain extent, providing a guiding path for the high-temperature electrolyte, making it easier to be guided to a safe area for release or absorption. An L-shaped design is suitable for space saving in a specific direction, effectively avoiding other components in a compact space while ensuring the correct guidance and release of the high-temperature electrolyte. Therefore, the shape of the first busbar 300 can be designed according to actual needs.

[0056] In addition, such as Figures 1-5As shown, there are multiple battery cells 10. A first busbar 300 is open on one side facing the battery cell 10, and the open side covers the multiple battery cell explosion-proof valves 100 of the battery cells 10. Alternatively, the first busbar 300 has multiple second through holes on the side facing the battery cell 10, with each of the multiple second through holes corresponding to one of the multiple battery cell explosion-proof valves 100 of the battery cells 10. The number of battery cells 10 is set to multiple, and the first busbar 300 is open on one side facing the battery cell 10, covering the multiple battery cell explosion-proof valves 100 of the battery cells 10. The first busbar 300 is open on one side; for example, its shape can be C-shaped, U-shaped, or L-shaped. The first busbar 300 can completely cover the battery cell explosion-proof valves 100, allowing the release of high-temperature electrolyte from the battery cells 10. The first busbar 300 has multiple second through holes on the side facing the battery cell 10. Multiple second through holes are provided one-to-one with the cell explosion-proof valves 100 of multiple cells 10. For example, the shape of the first busbar 300 can be set as circular or rectangular. Multiple second through holes are provided on the side of the first busbar 300 facing the cell 10. In this way, during thermal runaway, the cell explosion-proof valves 100 open, and the high-temperature electrolyte released by the cell 10 can be released through the second through holes of the first busbar 300, thereby ensuring the safety of the cell 10 and realizing the thermal and electrical separation of the battery pack 1.

[0057] It should be noted that the battery pack 1 also includes: a cover plate, with the upper end of the first busbar 300 open, the cover plate covering the tray 20 and sealing the upper end of the first busbar 300, and / or the lower end of the first busbar 300 open, with the bottom plate of the tray 20 sealing the lower end of the first busbar 300. The cover plate serves to cover and seal. The upper end of the first busbar 300 is open, the cover plate covers the tray 20, and the cover plate seals the upper end of the first busbar 300. The upper end of the first busbar 300 can be open; by providing the cover plate, the cover plate can cover and seal the first busbar 300, and / or the lower end of the first busbar 300 is open, with the bottom plate of the tray 20 sealing the lower end of the first busbar 300. The lower end can also be left open. For example, if the first busbar 300 is set to L-shape, the bottom plate of the tray 20 can cover and seal the first busbar 300. When the lower end of the first busbar 300 is left open, the structure of the first busbar 300 is simpler, which facilitates the installation and setting of the first busbar 300. The upper end and the lower end of the first busbar 300 can be left open at the same time, or one of the upper or lower ends can be left open.

[0058] In addition, such as Figures 3-5As shown, the first busbar 300 includes an upper plate 304, a lower plate 305 and a side plate 306. The upper plate 304 is connected to the upper end of the side plate 306 and extends toward one side of the battery cell 10. The lower plate 305 is connected to the lower end of the side plate 306 and extends toward one side of the battery cell 10. The upper plate 304, lower plate 305, and side plate 306 are components of the first busbar 300. The upper plate 304 is connected to the upper end of the side plate 306 and extends towards one side of the battery cell 10. The lower plate 305 is connected to the lower end of the side plate 306 and extends towards one side of the battery cell 10. The upper plate 304 and lower plate 305 are respectively connected to the upper and lower ends of the side plate 306. At this time, the upper plate 304, lower plate 305, and side plate 306 form a whole, which facilitates the installation and setting of the first busbar 300. At the same time, the upper plate 304 and lower plate 305 extend towards one side of the battery cell 10, so that the first busbar 300 can better release the high-temperature electrolyte released by the battery cell 10 and ensure the safety of the battery cell 10.

[0059] In addition, such as Figure 5 As shown, the first busbar 300 further includes a first latching protrusion 307 and a second latching protrusion 308. The first latching protrusion 307 is connected to the end of the upper plate 304 away from the side plate 306 and extends downward. The second latching protrusion 308 is connected to the end of the lower plate 305 away from the side plate 306 and extends upward. The first latching protrusion 307 and the second latching protrusion 308 are components of the first busbar 300, both of which can be used for latching and fixing the first busbar 300, so that the first busbar 300 covers the cell explosion-proof valve 100 of multiple battery cells 10. The first latching protrusion 307 is connected to the end of the upper plate 304 away from the side plate 306, and the first latching protrusion 307 extends downward. The second latching protrusion 308 is connected to the end of the lower plate 305 away from the side plate 306, and the second latching protrusion 308 extends upward. The first latching protrusion 307 and the second latching protrusion 308 are respectively connected to the side of the upper plate 304 and the lower plate 305 away from the side plate 306. The first latching protrusion 307 and the second latching protrusion 308 extend downward and upward respectively, so that the first busbar 300 can cover the cell explosion-proof valve 100 of multiple battery cells 10, and can release the high-temperature electrolyte released by the battery cells 10.

[0060] It should be noted that, as Figure 5As shown, a downwardly recessed groove 309 is provided at the connection between the lower plate 305 and the side plate 306. The groove 309 at the connection between the lower plate 305 and the side plate 306 can act as a snap-fit, which helps to simplify the assembly process, ensures accurate positioning between components, improves the stability of the overall structure, and prevents electrolyte backflow and leakage through gaps. This can prevent it from affecting other components in the battery pack 1 or causing more serious leakage accidents, thereby protecting the safety of the battery pack.

[0061] Optionally, the first busbar 300 further includes: a first extension plate and a second extension plate, the first extension plate being connected to the lower end of the upper plate 304 away from the side plate 306 and extending toward one side of the battery cell 10, and the second extension plate being connected to the upper end of the lower plate 305 away from the side plate 306 and extending toward one side of the battery cell 10. The first extension plate and the second extension plate are components of the first busbar 300, which can cover the cell explosion-proof valve 100 of multiple battery cells 10. The first extension plate is connected to the lower end of the upper plate 304 away from the side plate 306 and extends towards the side of the battery cell 10. The second extension plate is connected to the upper end of the lower plate 305 away from the side plate 306 and extends towards the side of the battery cell 10. The first extension plate and the second extension plate are respectively connected to the lower end of the upper plate 304 and the upper end of the lower plate 305, and the connecting ends are away from the side plate 306. Both the first extension plate and the second extension plate extend towards the side of the battery cell 10. In this way, the first busbar 300 can cover the cell explosion-proof valve 100 of multiple battery cells 10 and release the high-temperature electrolyte released by the battery cells 10.

[0062] In addition, such as Figure 1 As shown, cell 10 is a blade cell, extending along a first horizontal direction. Blade cells possess high energy density and excellent heat dissipation performance, resulting in higher safety. They can improve the energy density and safety of battery pack 1. Therefore, designating cell 10 as a blade cell better suits actual operating conditions, enhancing the energy density and safety of battery pack 1. The blade cell's extension along the first horizontal direction optimizes space utilization and enhances heat dissipation, thereby improving the overall performance of battery pack 1 and better meeting the requirements of modern electrical equipment for range, charging speed, and safety. It should be noted that the first busbar 300 can be applied to various cell 100s equipped with cell explosion-proof valves 100, and can be applied to cell explosion-proof valves 100 in various locations.

[0063] Optionally, the length direction of the blade cell is aligned with the length direction of the battery pack 1. This optimizes the space utilization of the battery pack 1, improves structural strength, facilitates thermal management and assembly, and enhances the safety of the battery pack 1. When the battery pack 1 is used in a vehicle, the length direction of the blade cell is aligned with the driving direction, which further improves the safety of the battery pack 1.

[0064] Specifically, the positive and negative terminals of the battery cell 10 are located at opposite ends in the first horizontal direction. In two adjacent battery cells 10, the positive terminal of one battery cell 10 and the negative terminal of the other battery cell 10 are connected in series at the same end in the first horizontal direction. The positive and negative terminals of each battery cell 10 are located at opposite ends in the first horizontal direction, that is, the length direction of the battery cell 10. In two adjacent battery cells 10, the positive terminal of one battery cell 10 and the negative terminal of the other battery cell 10 are connected in series at the same end in the first horizontal direction. For two adjacent battery cells 10, the positive terminal of one battery cell 10 and the negative terminal of the other battery cell 10 are connected at the same end in the first horizontal direction. This means that, sequentially, the positive terminal of the first battery cell 10 is connected to the negative terminal of the second battery cell 10. In this way, multiple battery cells 10 can be connected together, thereby increasing the total capacity of the battery pack 1 and extending the usage time of the electrical equipment.

[0065] It should be noted that, as Figure 5 As shown, the cell explosion-proof valve 100 is located above both ends of the cell 10 in the first horizontal direction. Positioning the cell explosion-proof valve 100 at the top facilitates rapid pressure release, prevents electrolyte leakage and diffusion, facilitates monitoring and maintenance, and ensures the safety of the cell 10, thereby improving the safety and performance of the battery pack 1.

[0066] In addition, such as Figure 1 As shown, the battery pack 1 also includes a cell assembly 60, which comprises multiple cells 10 arranged along a second horizontal direction. The multiple cells 10 can be combined to form the cell assembly 60, which can meet the battery performance requirements of different application scenarios and improve the stability and safety of the entire battery system. The arrangement of multiple cells 10 along the second horizontal direction in a cell assembly 60 allows for more even heat distribution, avoiding localized overheating, thereby extending the battery pack 1's lifespan and improving safety. Furthermore, arranging multiple cells 10 along the second horizontal direction simplifies the electrical connection design for series or parallel connections, reducing resistance and energy loss. Additionally, a reasonable layout enhances the mechanical strength of the entire battery pack 1, reducing damage caused by vibration or impact. It should be noted that there is a gap between the cell assembly 60 and the tray 20. To reduce electrolyte overflow into the inner cavity of the tray 20, a baffle can be installed at the gap between the cell assembly 60 and the tray 20.

[0067] Furthermore, such as Figure 2 As shown, the battery pack 1 also includes an explosion-proof beam 50, which is disposed between two adjacent cell groups 60. The explosion-proof beam 50 mainly enhances the safety and performance of the battery pack 1. With the explosion-proof beam 50 positioned between two adjacent cell groups 60, it ensures the safety of the entire battery pack 1. If a cell experiences thermal runaway, the explosion-proof beam 50 can prevent the rapid spread of flames and heat to adjacent cell groups 60, thereby slowing the spread of the accident and buying time for emergency measures. Secondly, the explosion-proof beam 50 also enhances the mechanical strength of the entire battery pack 1, ensuring that the battery pack 1 maintains its structural integrity when subjected to external impacts. Furthermore, the explosion-proof beam 50 can help guide the directional discharge of high-pressure gas generated during thermal runaway, reducing damage to surrounding components.

[0068] The electrical equipment according to the present utility model includes: the battery pack 1 described in the above embodiments.

[0069] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0070] In the description of this utility model, "first feature" and "second feature" may include one or more of the features. In the description of this utility model, "multiple" means two or more. In the description of this utility model, "above" or "below" the second feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. In the description of this utility model, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0072] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack (1), characterized in that, include: The battery cell (10) is provided with a battery cell explosion-proof valve (100) at least one end of the battery cell (10) in the horizontal first direction. The tray (20) is provided with the battery cell (10) and the tray (20) is provided with a battery pack explosion-proof valve (200). A busbar assembly (30) is disposed on the tray (20). The busbar assembly (30) includes a first busbar (300) and a second busbar (301). The first busbar (300) and the cell explosion-proof valve (100) are located at the same end of the cell (10) in a horizontal first direction, and the first busbar (300) is connected to the cell explosion-proof valve (100). The second busbar (301) is located at at least one end of the cell (10) in a horizontal second direction, and the second busbar (301) is connected to the battery pack explosion-proof valve (200). The first busbar (300) and the second busbar (301) are connected, and the horizontal first direction and the horizontal second direction are perpendicular to each other.

2. The battery pack (1) according to claim 1, characterized in that, The first busbar (300) has a first channel (302) formed therein, and the second busbar (301) has a second channel (303) formed therein. The first channel (302) and the second channel (303) are connected.

3. The battery pack (1) according to claim 1, characterized in that, The battery pack explosion-proof valve (200) and the second busbar (301) are located at the same end of the battery cell (10) in the second horizontal direction.

4. The battery pack (1) according to claim 1, characterized in that, Also includes: A fixing member (40) is fixed to the tray (20), and the fixing member (40) is located at at least one end of the cell (10) in a horizontal second direction. At least one end of the first busbar (300) is fixed to the fixing member (40), and the second busbar (301) is fixed to the fixing member (40) at the same end as the battery pack explosion-proof valve (200).

5. The battery pack (1) according to claim 4, characterized in that, The first busbar (300) is fixed to the fixing member (40) by an adhesive or fastener, and the second busbar (301) is fixed to the fixing member (40) by an adhesive or fastener.

6. The battery pack (1) according to claim 4, characterized in that, The fastener (40) is provided with a slot (400), and the second busbar (301) is engaged in the slot (400).

7. The battery pack (1) according to claim 6, characterized in that, The fixing member (40) is also provided with a snap-fit ​​part (401) at the slot (400), and the snap-fit ​​part (401) engages with the second busbar (301).

8. The battery pack (1) according to claim 4, characterized in that, The second busbar (301) is a metal part, and the fixing part (40) is a plastic part.

9. The battery pack (1) according to claim 1, characterized in that, Along the second horizontal direction, the shape of the projection of the first busbar (300) is C-shaped, circular, rectangular, U-shaped or L-shaped.

10. The battery pack (1) according to claim 9, characterized in that, There are multiple battery cells (10), and the first busbar (300) is open on one side facing the battery cell (10), with the open side covering the battery cell explosion-proof valves (100) of the multiple battery cells (10); or The first busbar (300) has a plurality of second through holes on the side facing the battery cell (10), and the plurality of second through holes are provided in a one-to-one correspondence with the battery cell explosion-proof valve (100) of the plurality of battery cells (10).

11. The battery pack (1) according to claim 9, characterized in that, Also includes: A cover plate, with the upper end of the first manifold (300) open, the cover plate covering the tray (20), and the cover plate sealingly covering the upper end of the first manifold (300); and / or The lower end of the first busbar (300) is open, and the bottom plate of the tray (20) is sealed and covered at the lower end of the first busbar (300).

12. The battery pack (1) according to claim 1, characterized in that, The first busbar (300) includes an upper plate (304), a lower plate (305) and a side plate (306). The upper plate (304) is connected to the upper end of the side plate (306) and extends toward one side of the battery cell (10). The lower plate (305) is connected to the lower end of the side plate (306) and extends toward one side of the battery cell (10).

13. The battery pack (1) according to claim 12, characterized in that, The first busbar (300) further includes a first latching protrusion (307) and a second latching protrusion (308). The first latching protrusion (307) is connected to the end of the upper plate (304) away from the side plate (306) and extends downward. The second latching protrusion (308) is connected to the end of the lower plate (305) away from the side plate (306) and extends upward.

14. The battery pack (1) according to claim 13, characterized in that, A downwardly recessed groove (309) is provided at the connection between the lower plate (305) and the side plate (306).

15. The battery pack (1) according to claim 12, characterized in that, The first busbar (300) further includes: a first extension plate and a second extension plate, the first extension plate being connected to the lower end of the upper plate (304) away from the side plate (306) and extending toward the side of the battery cell (10), and the second extension plate being connected to the upper end of the lower plate (305) away from the side plate (306) and extending toward the side of the battery cell (10).

16. The battery pack (1) according to claim 1, characterized in that, The battery cell (10) is a blade battery cell, which extends along a first horizontal direction.

17. The battery pack (1) according to claim 16, characterized in that, The length direction of the blade cell is consistent with the length direction of the battery pack (1).

18. The battery pack (1) according to claim 1, characterized in that, The positive and negative terminals of the battery cell (10) are located at the two ends of the horizontal first direction, respectively. In two adjacent battery cells (10), the positive terminal of one battery cell (10) and the negative terminal of the other battery cell (10) are connected in series at the same end of the horizontal first direction.

19. The battery pack (1) according to claim 1, characterized in that, The cell explosion-proof valve (100) is located above both ends of the cell (10) in the first horizontal direction.

20. The battery pack (1) according to claim 1, characterized in that, Also includes: A battery cell assembly (60) comprising a plurality of battery cells (10) arranged along a second horizontal direction.

21. The battery pack (1) according to claim 20, characterized in that, Also includes: An explosion-proof beam (50) is provided between two adjacent battery cell groups (60).

22. An electrical appliance, characterized in that, include: The battery pack (1) according to any one of claims 1-21.

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