Battery pack structure

Abstract

The embodiment of the utility model discloses a battery pack structure, and relates to the technical field of new energy batteries. Comprising a shell, a battery cell assembly, a confluence channel, a sealing piece and a plurality of first one-way valves, the shell is provided with a containing space, the battery cell assembly and the confluence channel are both installed in the containing space, the battery cell assembly comprises a plurality of battery cells arranged in sequence, each battery cell is provided with an anti-explosion valve, and the confluence channel is provided with through holes corresponding to the battery cells one to one; each through hole is provided with a first one-way valve, the first one-way valves can be opened towards the side of the confluence channel, each through hole is communicated with an anti-explosion valve through a sealing piece, and the confluence channel is communicated with the outside, so that after a single battery cell is subjected to thermal runaway, eruption substances in the single battery cell can flow into the confluence channel through the single through hole and the single first one-way valve; therefore, thermal runaway of other battery cells is avoided, and risks such as battery pack explosion or rapid fire catching are avoided.

Description

Technical Field

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

[0002] Current new energy battery packs consist of multiple battery cell units arranged and combined. Due to the requirements of the battery's operating environment, the battery pack needs to seal the internal cells. For an individual cell, the cell casing also needs to seal and protect the bare cell inside. When the battery is working, various unforeseen operating conditions or quality defects can lead to thermal runaway of the cell, causing internal materials and reactants to be ejected outwards. Because the battery pack is sealed, the ejected materials spread within the internal space of the battery pack, and conductive materials can fall onto the electrodes of other cells, causing short circuits and triggering thermal runaway in other cells. This can lead to risks such as the entire battery pack exploding or rapidly igniting. Utility Model Content

[0003] Therefore, it is necessary to provide a battery pack structure that addresses the technical problem that when the battery is in operation, various unforeseen operating conditions or quality defects can lead to thermal runaway of the battery cells, causing internal materials and reactive substances to be ejected outwards. Since the battery pack is in a sealed state, the ejected materials spread within the internal space of the battery pack, and conductive materials fall onto the electrodes of other battery cells, causing short circuits and triggering thermal runaway in other battery cells, which in turn can lead to the entire battery pack exploding or rapidly catching fire.

[0004] This utility model provides a battery pack structure, including: a shell, a cell assembly, a busbar channel, a seal, and multiple first one-way valves. The shell has an accommodating space, and the cell assembly and the busbar channel are both installed in the accommodating space. The cell assembly includes multiple cells arranged in sequence, and each cell is provided with an explosion-proof valve. The busbar channel has through holes corresponding to each cell, and each through hole is provided with a first one-way valve. The first one-way valve can be opened towards the busbar channel side. Each through hole is connected to the explosion-proof valve through the seal, and the busbar channel is connected to the outside.

[0005] In one embodiment, a plurality of the battery cells are arranged sequentially on one side of the busbar to form a battery cell array. The sealing member has a first side and a second side disposed opposite to the first side. The first side is connected to the battery cell array, and the second side is connected to the busbar. The sealing member has vent holes that correspond one-to-one with each of the explosion-proof valves.

[0006] In one embodiment, each of the sealing elements is provided in a one-to-one correspondence with each of the explosion-proof valves, each of the sealing elements is provided with a vent hole that is provided in a one-to-one correspondence with each of the explosion-proof valves, each of the sealing elements is provided with a first side and a second side provided opposite to the first side, the first side is connected to the battery cell, and the second side is connected to the busbar channel.

[0007] In one embodiment, the first one-way valve includes a valve body, an abutment portion connected to the valve body, and an elastic connecting piece. One end of the elastic connecting piece is connected to the valve body, and the other end is connected to the inner wall of the manifold. The abutment portion can abut against the manifold so that the valve body blocks the through hole.

[0008] In one embodiment, the battery pack structure further includes a tailpipe assembly, the manifold is connected to the tailpipe assembly, and the tailpipe assembly is installed outside the housing so that the ejected material in the manifold is discharged to the outside through the tailpipe assembly.

[0009] In one embodiment, the battery pack structure further includes an air blowing assembly connected to the manifold channel. The air blowing assembly is capable of blowing external gas into the manifold channel so that the ejected material in the manifold channel is discharged to the outside through the tailpipe assembly.

[0010] In one embodiment, the air blowing assembly includes a connecting pipe, a second one-way valve, a third one-way valve, and an air blower. The connecting pipe is connected to the manifold and to the outside. The second and third one-way valves are both installed inside the connecting pipe and can both open to the manifold. The air blower is installed inside the connecting pipe and is located between the second and third one-way valves.

[0011] In one embodiment, the blowing assembly further includes a power source connected to the blowing device and used to supply power to the blowing device.

[0012] In one embodiment, the battery pack structure further includes an air intake assembly connected to the tailpipe assembly and used to generate negative pressure by drawing air into the tailpipe assembly, so that the ejected material in the confluence channel is discharged to the outside through the tailpipe assembly.

[0013] Implementing the embodiments of this utility model will have the following beneficial effects:

[0014] The battery pack structure of this utility model has an outer shell with a housing space. The battery cell assembly and the busbar channel are installed in the housing space. The battery cell assembly includes multiple battery cells arranged in sequence. Each battery cell is equipped with an explosion-proof valve. The busbar channel has through holes that correspond one-to-one with each battery cell. Each through hole is equipped with a first one-way valve. The first one-way valve can be opened to the side of the busbar channel. Each through hole is connected to the explosion-proof valve through a sealing element. The busbar channel is connected to the outside. This allows the ejected material inside a single battery cell to flow into the busbar channel through a single through hole and a single first one-way valve, and then be discharged to the outside through the busbar channel, preventing other battery cells from experiencing thermal runaway and avoiding the risk of battery pack explosion or rapid fire. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0016] in:

[0017] Figure 1 This is an isometric schematic diagram of the battery pack structure in one embodiment.

[0018] Figure 2 for Figure 1 A schematic diagram of the battery cells in the battery pack structure shown.

[0019] Figure 3 for Figure 1 A schematic diagram of the busbar and seals in the battery pack structure shown.

[0020] Figure 4 for Figure 1 The diagram shows the busbar and the first one-way valve in the battery pack structure.

[0021] Figure label:

[0022] 1. Outer shell; 11. Compartmental space;

[0023] 2. Battery cell assembly; 21. Explosion-proof valve;

[0024] 3. Combination channel; 31. Through hole;

[0025] 4. Sealing element; 41. Vent hole;

[0026] 5. First check valve;

[0027] 6. Tailpipe assembly; 7. Air blowing assembly. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not 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.

[0031] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0032] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0033] Please combine them together Figures 1 to 4 The battery pack structure provided by this utility model will now be described.

[0034] The battery pack structure includes: a shell 1, a cell assembly 2, a busbar channel 3, a seal 4, and multiple first one-way valves 5. The shell 1 has an accommodating space 11. The cell assembly 2 and the busbar channel 3 are both installed in the accommodating space 11. The cell assembly 2 includes multiple cells arranged in sequence. Each cell is equipped with an explosion-proof valve 21. The busbar channel 3 is equipped with through holes 31 that correspond one-to-one with each cell. Each through hole 31 is equipped with a first one-way valve 5. The first one-way valve 5 can be opened to the side of the busbar channel 3. Each through hole 31 is connected to the explosion-proof valve 21 through the seal 4. The busbar channel 3 is connected to the outside.

[0035] It is understood that the outer shell 1 of the battery pack structure has a housing space 11, and the cell assembly 2 and the busbar channel 3 are both installed in the housing space 11. The cell assembly 2 includes multiple cells arranged in sequence, and each cell is equipped with an explosion-proof valve 21. The busbar channel 3 is equipped with through holes 31 that correspond one-to-one with each cell. Each through hole 31 is equipped with a first one-way valve 5. The first one-way valve 5 can be opened to the side of the busbar channel 3. Each through hole 31 is connected to the explosion-proof valve 21 through a sealing element 4. The busbar channel 3 is connected to the outside, so that when a single cell experiences thermal runaway, the ejected material inside the single cell will flow into the busbar channel 3 through a single through hole 31 and a single first one-way valve 5, and then be discharged to the outside through the busbar channel 3, thus preventing other cells from experiencing thermal runaway and avoiding the risk of battery pack explosion or rapid fire.

[0036] It should be noted that the battery pack has longitudinal beams, and the longitudinal beams are equipped with a busbar channel 3.

[0037] In one embodiment, such as Figures 1 to 3 As shown, multiple battery cells are arranged sequentially on one side of the manifold 3 to form a battery cell array. The sealing element 4 has a first side and a second side opposite to the first side. The first side is connected to the battery cell array, and the second side is connected to the manifold 3. The sealing element 4 has vent holes 41 corresponding to each explosion-proof valve 21. Specifically, the sealing element 4 is a high-temperature resistant sealing ring. The sealing element 4 seals the connection between the battery cell array and the wall of the through hole 31, preventing the ejected material from flowing out from the seal between the battery cell array and the wall of the through hole 31 after the explosion-proof valve 21 ruptures. By providing a sealing element 4 with multiple vent holes 41 corresponding to each explosion-proof valve 21, the ejected material from the explosion-proof valve 21 can flow into the manifold 3 through the vent holes 41 and the through hole 31.

[0038] Of course, in other embodiments, each sealing element 4 is provided in a one-to-one correspondence with each explosion-proof valve 21. Each sealing element 4 has a vent hole 41 corresponding to each explosion-proof valve 21. Each sealing element 4 has a first side and a second side opposite to the first side. The first side is connected to the battery cell, and the second side is connected to the manifold 3. Specifically, each sealing ring is a high-temperature resistant sealing ring. Each sealing element 4 can seal the connection between each battery cell and the hole wall of each through hole 31, so that the ejected material after the explosion-proof valve 21 ruptures will not flow out from the seal between the battery cell and the hole wall of the through hole 31.

[0039] Of course, in another embodiment, the battery cell also includes a raised structure and a protective patch. The raised structure is connected to the battery cell housing and communicates with the through hole 31. The raised structure is connected to the explosion-proof valve 21 and is used to fix the explosion-proof valve 21. The protective patch is attached to the explosion-proof valve 21. By setting the raised structure connected to the housing and the explosion-proof valve 21 connected to the raised structure, the explosion-proof valve 21 and the battery cell housing are sealed through the raised structure. Furthermore, after the explosion-proof valve 21 explodes, it can rupture inside the raised structure, giving the explosion-proof valve 21 an explosion space. The protective patch can protect the explosion-proof valve 21 and prevent damage to the explosion-proof valve 21 during installation.

[0040] In one embodiment, such as Figure 4 As shown, the first one-way valve 5 includes a valve body, an abutment portion connected to the valve body, and an elastic connecting piece. One end of the elastic connecting piece is connected to the valve body, and the other end is connected to the inner wall of the manifold 3. The abutment portion can abut against the manifold 3 to block the through hole 31. Specifically, when a single battery cell experiences thermal runaway, the pressure inside the through hole 31 of the single battery cell increases. The air pressure can push open the valve body, causing the abutment portion to move and the elastic connecting piece to undergo elastic deformation, allowing the valve body to open the through hole 31. When the pressure inside the through hole 31 of the single battery cell decreases, meaning no more material is ejected into the through hole 31, the deformation of the elastic connecting piece can drive the valve body and the abutment portion to reset, allowing the valve body to block the through hole 31 and prevent the ejected material from the manifold 3 from re-entering the through hole 31. After the valve body blocks the through hole 31, the abutment portion can abut against the wall of the return channel to block the through hole 31, thereby ensuring a tight seal.

[0041] In one embodiment, such as Figure 1 As shown, the battery pack structure also includes a tailpipe assembly 6. The manifold channel 3 is connected to the tailpipe assembly 6, and the tailpipe assembly 6 is installed on the outside of the housing 1 so that the ejected material in the manifold channel 3 can be discharged to the outside through the tailpipe assembly 6. By setting the tailpipe assembly 6, the ejected material in the manifold channel 3 can be discharged to the outside.

[0042] In this embodiment, the battery pack structure further includes an air blowing assembly 7, which is connected to the manifold 3. The air blowing assembly 7 can blow external gas into the manifold 3, so that the ejected material in the manifold 3 can be discharged to the outside through the tailpipe assembly 6. By setting the air blowing assembly 7, the air blowing assembly 7 can discharge the ejected material in the manifold 3 to the outside through the tailpipe assembly 6.

[0043] Furthermore, the air blowing assembly 7 includes a connecting pipe, a second one-way valve, a third one-way valve, and an air blower. The connecting pipe is connected to the manifold 3 and to the outside. Both the second and third one-way valves are installed inside the connecting pipe and can open into the manifold 3. The air blower is installed inside the connecting pipe and is located between the second and third one-way valves. Specifically, the air blower can be a fan. When a single battery cell experiences thermal runaway, the cell's explosion-proof valve 21 opens, and the ejected material enters the manifold 3 through the through-hole 31 and the first one-way valve 5. At this time, the air blower opens, and external air enters the manifold 3 through the connecting pipe, the second one-way valve, the air blower, and the third one-way valve. The ejected material in the manifold 3 is discharged to the outside through the tailpipe assembly 6.

[0044] Furthermore, the blowing assembly 7 also includes a power supply, which is electrically connected to the blowing device and is used to supply power to the blowing device.

[0045] Of course, in other embodiments, the battery pack structure also includes an air intake assembly, which is connected to the tailpipe assembly 6 and is used to intake air from the tailpipe assembly 6 so that the ejected material in the manifold 3 is discharged to the outside through the tailpipe assembly 6. Specifically, the air intake assembly can be a negative pressure pump. After the ejected material in the manifold 3 is subjected to negative pressure by the air intake, it will be discharged to the outside through the tailpipe assembly 6.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A battery pack structure, characterized by, The battery pack structure comprises a housing, an electric cell assembly, a current collection channel, a sealing member and a plurality of first one-way valves, the housing has a containing space, the electric cell assembly and the current collection channel are both installed in the containing space, the electric cell assembly comprises a plurality of electric cells arranged in sequence, each of the electric cells is provided with a burst valve, the current collection channel is provided with a through hole corresponding to each of the electric cells, each of the through holes is provided with the first one-way valve, the first one-way valve can be opened to the side of the current collection channel, each of the through holes is communicated with the burst valve through the sealing member, and the current collection channel is communicated with the outside. A plurality of the electric cells are arranged in sequence on one side of the current collection channel to form an electric cell row, the sealing member is provided with a first side and a second side opposite to the first side, the first side is connected with the electric cell row, and the second side is connected with the current collection channel, the sealing member is provided with a vent hole corresponding to each of the burst valves.

2. The battery pack structure of claim 1, wherein, Each of the sealing members is provided with a vent hole corresponding to each of the burst valves, each of the sealing members is provided with a first side and a second side opposite to the first side, the first side is connected with the electric cell, and the second side is connected with the current collection channel.

3. The battery pack structure of claim 1, wherein, The first one-way valve comprises a valve body, an abutting portion connected with the valve body and an elastic connecting piece, one end of the elastic connecting piece is connected with the valve body, the other end is connected with the inner wall of the current collection channel, and the abutting portion can abut against the current collection channel to block the through hole by the valve body.

4. The battery pack structure of claim 1, wherein, The battery pack structure further comprises a tail pipe assembly, the current collection channel is communicated with the tail pipe assembly, and the tail pipe assembly is installed outside the housing so that the eruption material in the current collection channel is discharged to the outside through the tail pipe assembly.

5. The battery pack structure of claim 1, wherein, The battery pack structure further comprises a blowing assembly, the blowing assembly is communicated with the current collection channel, and the blowing assembly can blow external gas into the current collection channel so that the eruption material in the current collection channel is discharged to the outside through the tail pipe assembly.

6. The battery pack structure of claim 5, wherein, The blowing assembly comprises a connecting pipe, a second one-way valve, a third one-way valve and a blower, the connecting pipe is communicated with the current collection channel and the outside, the second one-way valve and the third one-way valve are both installed inside the connecting pipe, the second one-way valve and the third one-way valve can be opened to the current collection channel, and the blower is installed inside the connecting pipe and located between the second one-way valve and the third one-way valve.

7. The battery pack structure of claim 6, wherein, The blowing assembly further comprises a power supply, the power supply is connected with the blower and used for supplying power to the blower.

8. The battery pack structure of claim 7, wherein, The battery pack structure further comprises a suction assembly, the suction assembly is communicated with the tail pipe assembly and used for generating negative pressure by suction to the tail pipe assembly so that the eruption material in the current collection channel is discharged to the outside through the tail pipe assembly.

9. The battery pack structure of claim 5, wherein, ​

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