Battery device and electric device

Abstract

A battery device (100) and an electric device (1000). The battery device (100) comprises: a case (10), at least one battery cell assembly (20), and a gas storage structure (50). The battery cell assembly (20) and the gas storage structure (50) are both accommodated in the case (10), the battery cell assembly (20) comprises a plurality of battery cells (30), each battery cell (30) is provided with a pressure relief structure (31), the gas storage structure (50) is located outside the battery cells (30), and at least part of the gas storage structure (50) is of hydrogen storage metal.

Description

Battery devices and electrical appliances

[0001] Cross-references to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 202510134004.7, filed on February 6, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Technology

[0004] In related technologies, batteries are widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. During use, individual battery cells generate a certain amount of gas, which increases the internal pressure of the cell. When the internal pressure increases to a certain level, there is a risk of thermal runaway. To reduce the internal pressure of the battery cell, a pressure relief structure is usually installed to discharge the gas inside the cell to the outside.

[0005] The gases produced by individual battery cells typically contain hydrogen; for example, alkali metal batteries produce a relatively large amount of hydrogen during operation. The battery cells are housed within the battery pack's casing. Gases produced within the cells are usually released into the casing through a pressure relief structure. This released gas accumulates within the casing, increasing internal pressure and potentially causing casing deformation. Furthermore, hydrogen, being a flammable and explosive gas, poses a risk of fire and flash explosion to the wiring harnesses inside the battery pack. Therefore, reducing the internal pressure of the battery pack and improving its reliability are pressing technical challenges. Summary of the Invention

[0006] In view of the above problems, this application provides a battery device and an electrical device, wherein the battery device can reduce its internal pressure, improve reliability, and extend the service life of the battery device.

[0007] In a first aspect, this application provides a battery device, comprising: a housing; at least one set of battery cell assemblies housed within the housing, the battery cell assemblies comprising a plurality of battery cells, each battery cell having a pressure relief structure; and a gas storage structure housed within the housing and located outside the battery cells, at least a portion of the gas storage structure being a hydrogen storage metal.

[0008] In the above technical solution, by setting a gas storage structure inside the battery device's housing, and placing the gas storage structure outside the individual battery cells, the gas discharged into the housing during the operation of the individual battery cells—for example, the gas generated inside the individual battery cells is discharged into the housing through a pressure relief structure—can be absorbed and stored by the gas discharged into the housing by the individual battery cells, such as hydrogen. This reduces the internal pressure of the housing, reduces housing deformation, reduces the risk of fire, flash explosion, and ignition of the wire harness inside the battery device's housing, improves the reliability of the battery device, and extends the battery device's lifespan.

[0009] In some embodiments, at least a portion of the gas storage structure is located on the side of the battery cell where the pressure relief structure is located.

[0010] In the above technical solution, by placing at least a portion of the gas storage structure on the side of the battery cell with the pressure relief structure, the gas storage structure can be arranged adjacent to the pressure relief structure of the battery cell. In this way, when the gas generated in the battery cell is discharged outward into the box through the pressure relief structure, it can be absorbed by the gas storage structure more quickly and timely, reducing the diffusion of the gas generated in the battery cell after it is discharged into the box. This can better reduce the risk of fire, flash explosion and ignition of the wire harness inside the battery device box, and can better improve the reliability of the battery device.

[0011] In some embodiments, at least a portion of the gas storage structure is disposed opposite to the pressure relief structure.

[0012] In the above technical solution, with at least a portion of the gas storage structure located on the side of the battery cell with the pressure relief structure, and at least a portion of the gas storage structure being positioned opposite the pressure relief structure, the gas generated inside the battery cell can be discharged directly toward the gas storage structure when it is discharged outward through the pressure relief structure into the housing. This allows the gas discharged from the battery cell to be concentrated near the gas storage structure, enabling it to be quickly and promptly absorbed by the gas storage structure. This better reduces the diffusion of the gas generated by the battery cell after it is discharged into the housing, thus better reducing the risk of fire, flash explosion, and ignition of the wire harness inside the battery device housing, and better improving the reliability of the battery device.

[0013] In some embodiments, the pressure relief structure is located on top of the battery cell, and at least a portion of the gas storage structure is located on the upper side of the battery cell.

[0014] In the above technical solution, by placing the pressure relief structure on top of the battery cell and at least part of the gas storage structure on the upper side of the battery cell, the hydrogen gas discharged from the pressure relief structure on top of the battery cell generally floats upwards, taking advantage of the fact that hydrogen gas is less dense than air. By placing the gas storage structure on the upper side of the battery cell, the gas storage structure can be located in a position where hydrogen gas is more concentrated. This allows the gas storage structure to quickly and fully absorb the hydrogen gas discharged from the battery cell, better reduce the internal pressure of the housing, reduce housing deformation, and improve the reliability of the battery device.

[0015] In some embodiments, at least some of the battery cells in the battery cell assembly share a single gas storage structure.

[0016] In the above technical solution, by having at least some of the battery cells in the battery cell assembly share a gas storage structure, the number of gas storage structures can be reduced, and the assembly of the gas storage structures can be facilitated.

[0017] In some embodiments, all the battery cells in the battery cell assembly share a single gas storage structure, and the number of gas storage structures is the same as the number of battery cell assemblies and they correspond one-to-one.

[0018] In the above technical solution, by sharing a single gas storage structure among all the battery cells in the battery cell assembly, the number of gas storage structures can be reduced more effectively, and the assembly of the gas storage structures can be made more convenient.

[0019] In some embodiments, at least a portion of the gas storage structure is sheet-like.

[0020] In the above technical solution, by setting at least a portion of the gas storage structure to a layered shape, the surface area of ​​the gas storage structure can be increased, thereby increasing the contact area between the gas storage structure and the gas discharged from the battery cell. This is beneficial to improving the efficiency of the gas storage structure in absorbing gases such as hydrogen, giving the gas storage structure a larger gas storage capacity, and further extending the service life of the battery device.

[0021] In some embodiments, the pressure relief structure is disposed toward the gas storage structure in the thickness direction of the gas storage structure.

[0022] In the above technical solution, by setting the gas storage structure as a layered structure and aligning the pressure relief structure with the gas storage structure in the thickness direction of the gas storage structure, the pressure relief structure of the battery cell faces the large surface side of the gas storage structure. In this way, the gas discharged from the battery cell to the outside of the battery cell and into the box through the pressure relief structure can be directly discharged towards the large surface side of the gas storage structure. This allows the gas discharged from the battery cell through the pressure relief structure to directly contact the large surface side of the gas storage structure, which helps to improve the efficiency of the gas discharged from the battery cell being absorbed by the gas storage structure and can better reduce the diffusion of the gas discharged from the battery cell in the box.

[0023] In some embodiments, a first insulating layer is provided between the gas storage structure and the battery cell.

[0024] In the above technical solution, by setting a first insulating layer between the gas storage structure and the battery cell, insulation between the gas storage structure and the battery cell can be achieved, which can prevent electrical connection between the gas storage structure and the battery cell and prevent the gas storage structure from short-circuiting multiple battery cells, thereby improving the reliability of the battery device.

[0025] In some embodiments, the first insulating layer is fixed to the gas storage structure.

[0026] In the above technical solution, by fixing the first insulating layer to the gas storage structure, the gas storage structure and the first insulating layer can be integrated into one piece, which is convenient for installation and fixation.

[0027] In some embodiments, the first insulating layer is a permeable layer that allows hydrogen gas to pass through.

[0028] In the above technical solution, by setting the first insulating layer as a permeable layer that can pass through hydrogen, the gas discharged from the battery cell can be absorbed by the gas storage structure through the first insulating layer while the first insulating layer insulates and separates the gas storage structure from the battery cell, thereby reducing the impact of the first insulating layer on the gas absorption efficiency of the gas storage structure.

[0029] In some embodiments, the first insulating layer is a polyimide layer, a polyurethane layer, a polypropylene layer, a chlorinated polyethylene layer, or a polytetrafluoroethylene layer.

[0030] In the above technical solution, by setting the first insulating layer as a polyimide layer, a polyurethane layer, a polypropylene layer, a chlorinated polyethylene layer, or a polytetrafluoroethylene layer, the first insulating layer can have good air permeability, so that the gas discharged from the battery cell can quickly pass through the first insulating layer and come into contact with the gas storage structure for absorption by the gas storage structure, and also makes the first insulating layer have good insulation and heat resistance.

[0031] In some embodiments, a containment space is defined between the housing and the battery cell assembly, and at least a portion of the gas storage structure is located within the containment space.

[0032] In the above technical solution, by setting at least part of the gas storage structure in the accommodating space defined by the box and the battery cell assembly, the gap space between the box and the battery cell assembly can be fully utilized, making the overall structure of the battery device compact. At the same time, by setting the gas storage structure in the box to absorb the gas such as hydrogen emitted by the battery cell, the overall energy density of the battery device can be high.

[0033] In some embodiments, the battery device includes an integrated busbar located within the housing and the accommodating space. The electrode leads of each battery cell are located on the side of the battery cell facing the integrated busbar. The integrated busbar includes a wiring harness board, a conductive connector, and a sampling circuit board. The wiring harness board is an insulating component. The conductive connector and the sampling circuit board are both disposed on the wiring harness board. The conductive connector connects to the electrode leads of adjacent battery cells. The sampling circuit board is used to collect information from the battery cells. At least a portion of the gas storage structure is integrated into the integrated busbar.

[0034] In the above technical solution, by integrating the gas storage structure onto the integrated busbar of the battery device, the gas storage structure and the integrated busbar are integrated into a whole structure. While setting the gas storage structure in the battery device box, it is beneficial to simplify the overall structure of the battery device and also to facilitate the rapid installation of the gas storage structure and the integrated busbar. It is convenient to assemble the gas storage structure and the integrated busbar into the box as a whole structure, which helps to improve the assembly efficiency of the battery device.

[0035] In some embodiments, the gas storage structure integrated into the integrated busbar is formed in a sheet-like shape, and the thickness direction of the gas storage structure integrated into the integrated busbar is consistent with the thickness direction of the integrated busbar.

[0036] In the above technical solution, by setting the gas storage structure integrated into the integrated busbar as a layered structure, the surface area of ​​the gas storage structure can be increased, thereby increasing the contact area between the gas storage structure and the gas discharged from the battery cells. This is beneficial to improving the efficiency of the gas storage structure in absorbing gases such as hydrogen, giving the gas storage structure a larger gas storage capacity, and further extending the service life of the battery device. Furthermore, by setting the gas storage structure integrated into the integrated busbar as a layered structure and aligning the thickness direction of the gas storage structure with the thickness direction of the integrated busbar, the flat structural characteristics of the integrated busbar can be fully utilized. This allows the gas storage structure to be set to a larger size and have a larger surface area, thereby improving the gas absorption efficiency and gas storage capacity of the gas storage structure. Moreover, the overall thickness of the gas storage structure after integration into the integrated busbar does not increase significantly, resulting in a more compact overall structure after at least part of the gas storage structure is integrated with the integrated busbar. This reduces the use of space within the casing and is beneficial for the arrangement of other components such as battery cells within the casing.

[0037] In some embodiments, the pressure relief structure is located on the side of the battery cell facing the integrated busbar.

[0038] In the above technical solution, by setting the pressure relief structure on the side of the battery cell facing the integrated busbar, the gas discharged from the battery cell through the pressure relief structure can be directly discharged to the integrated busbar. Since the gas storage structure is integrated on the integrated busbar, the gas discharged from the battery cell can be concentrated near the gas storage structure, so that it can be quickly and timely absorbed by the gas storage structure. This better reduces the diffusion of the gas generated by the battery cell after it is discharged into the box, which can better reduce the risk of fire, flash explosion and ignition of the wire harness inside the battery device box, and can better improve the reliability of the battery device.

[0039] In some embodiments, at least a portion of the gas storage structure is located on the side of the integrated busbar facing the battery cell.

[0040] In the above technical solution, by placing at least a portion of the gas storage structure on the side of the integrated busbar facing the battery cell, the distance between the gas storage structure and the pressure relief structure can be made closer. In this way, when the gas generated in the battery cell is discharged outward into the box through the pressure relief structure, it can be discharged directly toward the gas storage structure. This allows the gas discharged from the battery cell to be more concentrated near the gas storage structure, so that it can be quickly and timely absorbed by the gas storage structure. This better reduces the diffusion of the gas generated by the battery cell after it is discharged into the box, and can better reduce the risk of fire, flash explosion and ignition of the wire harness inside the battery device box, and can better improve the reliability of the battery device.

[0041] In some embodiments, a receiving gap is defined between the wiring harness and the battery cell assembly, the pressure relief structure faces the receiving gap, and at least a portion of the gas storage structure is located within the receiving gap.

[0042] In the above technical solution, by positioning at least a portion of the gas storage structure between the wiring harness and the battery cell assembly to define a receiving gap, and by positioning the pressure relief structure towards the receiving gap, the gas discharged from the battery cell through the pressure relief structure can be directly discharged into the receiving gap. Furthermore, the integrated busbar can prevent the gas discharged from the battery cell through the pressure relief structure into the receiving gap from diffusing within the housing, thus concentrating the gas discharged from the battery cell within the receiving gap. This allows the gas storage structure located within the receiving gap to quickly and effectively absorb the gas discharged from the battery cell, thereby better reducing the risk caused by the diffusion of hydrogen discharged from the battery cell within the housing.

[0043] In some embodiments, at least a portion of the gas storage structure is disposed on at least one of the wire harness board, the sampling circuit board, and the conductive connector.

[0044] In the above technical solution, by placing at least a portion of the gas storage structure on at least one of the wire harness board, the sampling circuit board, and the conductive connector, at least one of the wire harness board, the sampling circuit board, and the conductive connector in the integrated busbar can be used as the carrier of the gas storage structure, which facilitates the installation of the gas storage structure.

[0045] In some embodiments, at least a portion of the gas storage structure is integrated into the sampling circuit board.

[0046] In the above technical solution, by integrating at least a portion of the gas storage structure onto the sampling circuit board, the larger surface area of ​​the sampling circuit board can be utilized, facilitating the installation of the gas storage structure. This also allows for the gas storage structure to be configured as a layered structure with a large surface area. Furthermore, integrating at least a portion of the gas storage structure onto the sampling circuit board has minimal impact on the sampling circuit board. Additionally, integrating at least a portion of the gas storage structure with the sampling circuit board as a single unit facilitates the assembly of the gas storage structure and the sampling circuit board onto the wiring harness board.

[0047] In some embodiments, at least a portion of the gas storage structure is disposed on the side of the sampling circuit board facing the battery cell.

[0048] In the above technical solution, by placing at least a portion of the gas storage structure on the side of the sampling circuit board facing the battery cell, the distance between the gas storage structure and the battery cell can be reduced. This allows the gas emitted by the battery cell to be located near the gas storage structure, facilitating its rapid absorption and storage. For example, when the pressure relief structure of the battery cell is located on the side facing the integrated busbar, the gas emitted by the battery cell through the pressure relief structure can be directly discharged towards the gas storage structure, which is beneficial for the gas storage structure to quickly absorb the gas emitted by the battery cell and reduce the diffusion of the gas emitted by the battery cell within the casing.

[0049] In some embodiments, the sampling circuit board includes a sampling conductive layer, a second insulating layer, and a third insulating layer, wherein the second insulating layer and the third insulating layer are disposed on opposite sides of the sampling conductive layer in the thickness direction, the second insulating layer is located on the side of the sampling conductive layer closer to the battery cell, and at least a portion of the gas storage structure is disposed between the sampling conductive layer and the second insulating layer.

[0050] In the above technical solution, by integrating at least part of the gas storage structure onto the sampling circuit board and placing at least part of the gas storage structure between the sampling conductive layer and the second insulating layer of the sampling circuit board, the gas storage structure and the sampling circuit board can be integrated into a whole structure without significantly increasing the thickness of the sampling circuit board. The first insulating layer can also be omitted, and the second insulating layer can play the role of the first insulating layer.

[0051] In some embodiments, the second insulating layer is a permeable layer that allows hydrogen gas to pass through.

[0052] In the above technical solution, by setting the second insulating layer as a gas-permeable layer that can pass through hydrogen, the second insulating layer can insulate the gas storage structure and the sampling conductive layer from the battery cell. At the same time, the gas emitted by the battery cell can come into contact with the gas storage structure through the second insulating layer and be absorbed by the gas storage structure, thereby reducing the impact of the second insulating layer on the gas absorption efficiency of the gas storage structure.

[0053] In some embodiments, the sampling circuit board includes a sampling conductive layer, a second insulating layer, and a third insulating layer, wherein the second insulating layer and the third insulating layer are disposed on opposite sides of the sampling conductive layer in the thickness direction, the second insulating layer is located on the side of the sampling conductive layer closer to the battery cell, and at least a portion of the gas storage structure is constituted by the sampling conductive layer.

[0054] In the above technical solution, by making the sampling conductive layer of the sampling circuit board constitute at least part of the gas storage structure, the sampling conductive layer can not only play the role of collecting information of individual battery cells, but also have the function of gas absorption and storage. This eliminates the need for an additional gas storage structure and enables the sampling circuit board to have both sampling information and gas absorption and storage functions.

[0055] In some embodiments, at least one of the second insulating layer and the third insulating layer is a gas-permeable layer that allows hydrogen to pass through.

[0056] In the above technical solution, by setting at least one of the second insulating layer and the third insulating layer as a gas-permeable layer that can pass through hydrogen, the second insulating layer can insulate the gas storage structure and the sampling conductive layer from the battery cell. At the same time, the gas emitted by the battery cell can come into contact with the gas storage structure through the second insulating layer and / or the third insulating layer, and thus be absorbed by the gas storage structure, thereby reducing the impact of the second insulating layer and / or the third insulating layer on the gas absorption efficiency of the gas storage structure.

[0057] In some embodiments, the electrode leads and the pressure relief structure are both located on top of the battery cell, and the integrated busbar is located on the upper side of the battery cell assembly.

[0058] In the above technical solution, by placing the electrode lead-out end on the top of the battery cell and the integrated busbar on the upper side of the battery cell assembly, it is convenient to connect the integrated busbar to the electrode lead-out end. Furthermore, by placing the pressure relief structure on the top of the battery cell and integrating the gas storage structure on the integrated busbar on the upper side of the battery cell assembly, taking advantage of the fact that hydrogen has a lower density than air, the hydrogen gas discharged from the pressure relief structure on the top of the battery cell generally floats upward. By placing the gas storage structure on the integrated busbar on the upper side of the battery cell, the gas storage structure can be positioned on the upper side of the battery cell, thus placing the gas storage structure in a position where hydrogen is more concentrated. This allows the gas storage structure to quickly and fully absorb the hydrogen gas discharged from the battery cell, better reduce the internal pressure of the housing, reduce housing deformation, and improve the reliability of the battery device.

[0059] In some embodiments, the battery device includes a sampling circuit board located within the housing and the containment space, the sampling circuit board being used to collect information from the individual battery cells, and at least a portion of the gas storage structure being integrated into the sampling circuit board.

[0060] In the above technical solution, by integrating the gas storage structure onto the sampling circuit board, the larger surface area of ​​the sampling circuit board can be utilized to facilitate the setting of the gas storage structure. It also allows for the gas storage structure to be configured as a layered structure with a large surface area. Furthermore, integrating the gas storage structure onto the sampling circuit board has minimal impact on the circuit board itself. Additionally, integrating the gas storage structure and the sampling circuit board into a single unit facilitates their integration into the enclosure before final assembly.

[0061] In some embodiments, the battery device includes a conductive connector located within the housing and the receiving space, the conductive connector connecting to the electrode leads of adjacent battery cells, and at least a portion of the gas storage structure being integrated into the conductive connector.

[0062] In the above technical solution, by integrating the gas storage structure onto the conductive connector, and utilizing a large number of conductive connectors, the gas storage structure can have more carriers, thereby allowing for more locations and a greater number of gas storage structures to be arranged, resulting in a larger overall gas intake efficiency and gas storage capacity for the gas storage structure.

[0063] In some embodiments, the pressure relief structure includes a waterproof and breathable membrane that can be permeated with hydrogen gas.

[0064] In the above technical solution, by setting the pressure relief structure as a waterproof and breathable membrane, the waterproof and breathable membrane can both allow air to pass through and prevent liquids such as water from entering the battery cell. When the battery cell is working normally, the gas generated inside the battery cell, such as hydrogen, can be discharged to the outside of the battery cell and into the box in a timely manner through the waterproof and breathable membrane, so that it can be absorbed and stored by the gas storage structure located inside the box.

[0065] In some embodiments, the battery cell is configured as an alkali metal battery.

[0066] In the above technical solution, by setting the battery cell as an alkali metal battery, the battery cell can have a high energy density. Furthermore, by setting a gas storage structure inside the casing, gases such as hydrogen discharged into the casing during the operation of the battery cell can be absorbed and stored, reducing the internal pressure of the casing, reducing the deformation of the casing, improving the reliability of the battery device, and extending the service life of the battery device.

[0067] In some embodiments, the electrode assembly includes a negative electrode sheet, the negative electrode sheet including a negative current collector and an active material layer disposed on at least one side of the negative current collector, the active material layer including an elemental active metal.

[0068] In the above technical solution, by making the active material layer of the negative electrode sheet include active metal elements, the battery cell can have a high energy density. Since the active metal elements will react with the electrolyte in the battery cell to produce gas, such as a large amount of hydrogen, by setting a gas storage structure in the box, the gas such as hydrogen discharged into the box during the operation of the battery cell can be absorbed and stored, reducing the internal pressure of the box, reducing the deformation of the box, improving the reliability of the battery device, and extending the service life of the battery device.

[0069] In some embodiments, the active metal element includes at least one of lithium, sodium, potassium, zinc, or aluminum.

[0070] In the above technical solution, by using an elemental active metal including at least one of lithium, sodium, potassium, zinc, or aluminum, which is relatively reactive and will undergo side reactions with the electrolyte, producing a large amount of gas with hydrogen accounting for >90% of the gas, a gas storage structure can be set in the battery cell to absorb and store the gas, such as hydrogen, discharged into the battery cell during operation. This reduces the internal pressure of the battery cell, reduces deformation of the battery cell, improves the reliability of the battery device, and extends the service life of the battery device.

[0071] In some embodiments, the electrolyte of the battery cell includes a solvent, which is configured as at least one of an ether solvent or an ester solvent.

[0072] In the above technical solution, by setting the solvent in the electrolyte of the battery cell as at least one of ether solvent or ester solvent, the ether solvent and ester solvent have good compatibility with the hydrogen storage metal in the gas storage structure, and hydrogen gas is generated during the battery cell cycle. The hydrogen gas discharged from the battery cell into the box can be better absorbed and stored by the hydrogen storage metal, reducing the internal pressure of the box, reducing the deformation of the box, improving the reliability of the battery device, and extending the service life of the battery device.

[0073] In some embodiments, the solvent includes an ether solvent, which includes at least one of 1,2-dimethoxypropane, dimethoxymethane, ethylene glycol dimethyl ether, tetrahydrofuran, 2-methyltetrahydrofuran, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, pentaethylene glycol dimethyl ether, polyethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol diethyl ether, triethylene glycol diethyl ether, tetraethylene glycol diethyl ether, pentaethylene glycol diethyl ether, ethylene glycol dibutyl ether, diethylene glycol dibutyl ether, or 1,3-dioxane.

[0074] In the above technical solution, by including the above-mentioned solvent in the ether solvent, the ether solvent has good compatibility with the hydrogen storage metal in the gas storage structure, and hydrogen is generated during the cycle of the battery cell. The generated hydrogen can be better absorbed and stored by the hydrogen storage metal. The hydrogen discharged from the battery cell into the box can be better absorbed and stored by the hydrogen storage metal, reducing the internal pressure of the box, reducing the deformation of the box, improving the reliability of the battery device, and extending the service life of the battery device.

[0075] In some embodiments, the hydrogen storage metal includes zirconium alloys, magnesium alloys, titanium alloys, vanadium alloys, or La. x Ni y M z At least one of the following, wherein M includes at least one of Zr, Mn, Mg, Zn, Al, Ti, Fe, Cu, Co, Y, Ca or Bi, 0 < x ≤ 2, 0 ≤ y ≤ 7, 0 ≤ z ≤ 3.

[0076] In the above technical solutions, hydrogen storage metals include zirconium alloys, magnesium alloys, titanium alloys, vanadium alloys, or La. x Ni y M z At least one of these can enable hydrogen storage metals to have good hydrogen absorption capacity and effect.

[0077] In some embodiments, M includes at least one of Al, Mn, Mg, Fe, Y, or Bi, and 0.3 ≤ x ≤ 1, 1 ≤ y ≤ 5, 0 ≤ z ≤ 1; or the titanium alloy includes at least one of TiNi, Ti2Ni, TiFe, or TiMn2; or the magnesium alloy includes at least one of Mg2Ni, Mg2Cu, Mg2Co, Mg2Al, Mg2Cr, or Mg2Te; or the zirconium alloy includes at least one of ZrV2, ZrCr2, or ZrMn2; or the vanadium alloy includes V3TiNi. 0.56 M1m, m = 0.046-0.24, M1 includes at least one of Al, Si, Fe, Cu or Zr.

[0078] In the above technical solution, by including at least one of Al, Mn, Mg, Fe, Y or Bi, the hydrogen storage metal can have better hydrogen absorption capacity and hydrogen absorption effect.

[0079] In some embodiments, the hydrogen storage metal includes LaNi 3.5 M2 x1 M3 y1 M4 z1Where x1 is 0.2-0.6, y1 is 0-1, z1 is 0.3-0.9, x1+y1+z1=1.5, M2 includes at least one of Mn or Fe, M3 includes at least one of Zr, Ti or Y, and M4 includes at least one of Al, Mg, Ca or Bi.

[0080] In the above technical solution, by including LaNi as a hydrogen storage metal... 3.5 M2 x1 M3 y1 M4 z1 This can give hydrogen storage metals better hydrogen absorption capacity and effect.

[0081] In some embodiments, the hydrogen storage metal includes La 0.5 Ni 4.5 Y 0.5 LaNi 3.5 Mn 0.2 YBi 0.3 LaNi 3.5 Mn 0.6 Y 0.4 Bi 0.5 LaNi 3.5 Mn 0.2 Y 0.4 Bi 0.9 LaTi 3.5 Fe 0.4 Zr 0.5 Bi 0.6 LaTi 3.5 Fe 0.4 Zr 0.5 Mg 0.6 LaNi 4.26 Al 0.08 Mg 0.16 Or La 0.43 Y 0.57 Ni 4.5 Al 0.08 Mn 0.3 At least one of them.

[0082] In the above technical solution, by including the aforementioned metal types in the hydrogen storage metal, the hydrogen storage metal can have better hydrogen absorption capacity and hydrogen absorption effect.

[0083] Secondly, this application provides an electrical device, including: the battery device of the first aspect embodiment described above.

[0084] In the above technical solution, by setting the battery device, the battery device has high reliability and long service life, which is conducive to improving the overall performance of the power-consuming device.

[0085] Additional aspects and advantages of this application 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 this application. Attached Figure Description

[0086] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0087] Figure 1 is a schematic diagram of a battery device according to some embodiments of this application;

[0088] Figure 2 is a top view of the battery device in Figure 1;

[0089] Figure 3 is a cross-sectional view along line CC in Figure 2;

[0090] Figure 4 is an enlarged view of point D in Figure 3;

[0091] Figure 5 is an explosion diagram of the battery device in Figure 1;

[0092] Figure 6 is a schematic diagram of a single battery cell in the battery device shown in Figure 1;

[0093] Figure 7 is a schematic diagram of the integrated busbar of the battery device in Figure 1;

[0094] Figure 8 is a schematic diagram of the integration of the integrated busbar and the gas storage structure of a battery device according to some embodiments of this application;

[0095] Figure 9 is a schematic diagram of the integration of the integrated busbar and gas storage structure of a battery device according to some other embodiments of this application;

[0096] Figure 10 is a schematic diagram of the integration of the integrated busbar and the gas storage structure of a battery device according to some embodiments of the present application;

[0097] Figure 11 is a schematic diagram of an electrical device according to some embodiments of this application.

[0098] Reference numerals: 100, Battery assembly; 10, Housing; 11, First housing; 12, Second housing; 13, Receiving space; 20, Battery cell assembly; 30, Battery cell; 31, Pressure relief structure; 311, Waterproof and breathable membrane; 32, Outer shell; 33, Electrode assembly; 34, Electrode lead-out end; 40, Integrated busbar; 41, Wiring harness board; 42, Conductive connector; 43, Sampling circuit board; 431, Sampling conductive layer; 432, Second insulating layer; 433, Third insulating layer; 44, Receiving gap; 50, Gas storage structure; 51, First insulating layer; 1000, Electrical device; 200, Vehicle body. Detailed Implementation

[0099] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0100] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0101] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0102] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0103] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0104] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0105] In this application, "multiple" means two or more (including two).

[0106] In the embodiments of this application, unless otherwise specified, all implementation methods and optional implementation methods of this application can be combined with each other to form new technical solutions.

[0107] In the embodiments of this application, unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form new technical solutions.

[0108] In embodiments of this application, a battery apparatus may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or a combination of these cells via a busbar. For example, a battery cell assembly is typically formed by arranging multiple battery cells; a battery cell assembly may also be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module may be formed by bundling multiple battery cells together with cable ties.

[0109] The battery device can be a battery pack, which includes a housing and one or more individual battery cells housed within the housing. The individual battery cells can be battery modules, which can be housed within the housing by securing the battery modules to the housing; alternatively, multiple individual battery cells can be housed within the housing by directly securing them to the housing.

[0110] In embodiments of this application, the housing may include a first housing and a second housing. The first housing and the second housing are fastened together to form a closed space inside the housing for housing individual battery cells. Here, "closed" refers to covering or shutting down; it can be sealed or unsealed. The first housing may be a top cover or a bottom plate. For example, the housing may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, forming a closed space inside the housing for housing individual battery cells.

[0111] In embodiments of this application, the housing can be part of the vehicle's chassis structure. For example, a portion of the housing can be at least a part of the vehicle's floor, or a portion of the housing can be at least a part of the vehicle's crossbeams and longitudinal beams.

[0112] In this embodiment, the battery cell can be a rechargeable battery, which refers to a battery cell that can be recharged after discharge to activate the active materials and continue to be used. The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc. The battery cell can be flat.

[0113] In related technologies, batteries are widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. During use, individual battery cells generate a certain amount of gas, which increases the internal pressure of the cell. When the internal pressure increases to a certain level, there is a risk of thermal runaway. To reduce the internal pressure of the battery cell, a pressure relief structure is usually installed to discharge the gas inside the cell to the outside.

[0114] The gases produced by individual battery cells typically contain hydrogen; for example, alkali metal batteries produce a relatively large amount of hydrogen during operation. The battery cells are housed within the battery pack's casing. Gases produced within the cells are usually released into the casing through a pressure relief structure. This released gas accumulates within the casing, increasing internal pressure and potentially causing casing deformation. Furthermore, hydrogen, being a flammable and explosive gas, poses a risk of fire and flash explosion to the wiring harnesses inside the battery pack. Therefore, reducing the internal pressure of the battery pack and improving its reliability are pressing technical challenges.

[0115] Based on this, this application proposes a battery device, including a housing, at least one set of battery cell assemblies and a gas storage structure. The battery cell assemblies and the gas storage structure are both housed in the housing. The battery cell assembly includes multiple battery cells, each battery cell is provided with a pressure relief structure, and the gas storage structure is located outside the battery cells. At least a portion of the gas storage structure is a hydrogen storage metal.

[0116] In the above technical solution, by setting a gas storage structure inside the battery device's housing, and placing the gas storage structure outside the individual battery cells, the gas discharged into the housing during the operation of the individual battery cells—for example, the gas generated inside the individual battery cells is discharged into the housing through a pressure relief structure—can be absorbed and stored by the gas discharged into the housing by the individual battery cells, such as hydrogen. This reduces the internal pressure of the housing, reduces housing deformation, reduces the risk of fire, flash explosion, and ignition of the wire harness inside the battery device's housing, improves the reliability of the battery device, and extends the battery device's lifespan.

[0117] The battery device disclosed in this application can be used in electrical devices that use the battery device as a power source or in various energy storage systems that use the battery device as an energy storage element. Besides vehicles, the battery device can also be used in, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0118] The electrical devices disclosed in this application can be gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device is installed inside the vehicle, and the battery device can be located at the bottom, front, or rear of the vehicle. The battery device can be used to power the vehicle; for example, the battery device can serve as the vehicle's operating power source. The vehicle may also include a controller and a motor. The controller is used to control the battery device to supply power to the motor, for example, for the vehicle's starting, navigation, and operating power needs. In some embodiments of this application, the battery device can not only serve as the vehicle's operating power source but also as the vehicle's drive power source, replacing or partially replacing gasoline or natural gas to provide driving power for the vehicle.

[0119] The battery device 100 according to an embodiment of the present application is described below with reference to Figures 1-10.

[0120] Referring to Figures 1-5, in a first aspect, this application provides a battery device 100, including: a housing 10, at least one set of battery cell assembly 20 and a gas storage structure 50, wherein the battery cell assembly 20 and the gas storage structure 50 are both housed within the housing 10, the battery cell assembly 20 includes a plurality of battery cells 30, the battery cells 30 are provided with a pressure relief structure 31, the gas storage structure 50 is located outside the battery cells 30, and at least a portion of the gas storage structure 50 is a hydrogen storage metal.

[0121] The battery device 100 may include one group of battery cells 20 or multiple groups of battery cells 20. When the battery device 100 includes multiple groups of battery cells 20, the multiple groups of battery cells 20 may be arranged in a single row or in multiple rows and columns. The multiple battery cells 30 in each group of battery cells 20 may be arranged in a single row or in multiple rows and columns.

[0122] For example, the shape of the battery cell 30 can be constructed as a cuboid.

[0123] For example, the pressure relief structure 31 may include a one-way valve. When the pressure inside the battery cell 30 is high, the one-way valve can open under the action of the pressure difference inside and outside the battery cell 30, so that the gas inside the battery cell 30, such as hydrogen, is discharged to the outside of the battery cell 30 and into the housing 10 through the pressure relief structure 31.

[0124] For example, the pressure relief structure 31 may include a waterproof and breathable membrane 311. When the pressure inside the battery cell 30 is high, the gas inside the battery cell 30, such as hydrogen, is discharged to the outside of the battery cell 30 and into the housing 10 through the waterproof and breathable membrane 311.

[0125] The battery cell 30 includes a housing 32, an electrode assembly 33, and an electrode lead 34, with the electrode assembly 33 housed within the housing 32. At least a portion of the electrode lead 34 is located outside the housing 32 of the battery cell 30, and the electrode lead 34 is connected to the tabs of the electrode assembly 33. For example, the electrode lead 34 can be welded to the tabs of the electrode assembly 33. The electrode lead 34 is a conductive element, used to facilitate electrical connection between the battery cell 30 and other battery cells 30 or other components. For example, the electrode lead 34 can be in the form of a block or columnar structure.

[0126] The battery cell 30 can be placed upright inside the housing 10, for example, the electrode lead 34 of the battery cell 30 is located at the top of the battery cell 30.

[0127] The electrode assembly 33 includes a positive electrode, a negative electrode, and a separator located between the positive and negative electrode. The electrode assembly 33 can be a wound electrode assembly 33 or a stacked electrode assembly 33.

[0128] Correspondingly, the electrode lead-out terminal 34 also includes a positive electrode lead-out terminal 34 and a negative electrode lead-out terminal 34. The positive electrode lead-out terminal 34 is connected to the tab of the positive electrode plate, and the negative electrode lead-out terminal 34 is connected to the tab of the negative electrode plate.

[0129] The positive electrode lead 34 and the negative electrode lead 34 of the battery cell 30 can be located on the same side of the battery cell 30, and the pressure relief structure 31 can also be located on the same side of the battery cell 30 as the electrode lead 34. For example, when the pressure relief structure 31 can also be located on the same side of the battery cell 30 as the electrode lead 34, the pressure relief structure 31 can be located between the positive electrode lead 34 and the negative electrode lead 34.

[0130] The gas storage structure 50 is located outside the battery cell 30 and inside the housing 10. At least a portion of the gas storage structure 50 can be fixed to the battery cell 30, at least a portion of the gas storage structure 50 can be fixed to the housing 10, or at least a portion of the gas storage structure 50 can be fixed to other components inside the housing 10, such as the integrated busbar 40, the sampling circuit board 43, or the conductive connector 42 that electrically connects to adjacent battery cells 30 inside the housing 10.

[0131] At least a portion of the gas storage structure 50 may be a separately manufactured structure. The gas storage structure 50 may be fixed inside the housing 10 by fastening methods such as bonding or riveting. At least a portion of the gas storage structure 50 may be a coated structure. The outer surface of the battery cell 30, the inner wall of the housing 10, and other components inside the housing 10 may serve as carriers for the gas storage structure 50. The gas storage structure 50 may be coated onto the aforementioned at least a portion of the structure in the form of a coating.

[0132] At least a portion of the gas storage structure 50 is a hydrogen storage metal; it can be a partial or complete hydrogen storage metal. The hydrogen storage metal can adsorb and store hydrogen. For example, when a portion of the gas storage structure 50 is a hydrogen storage metal, that portion can adsorb and store hydrogen, while the remaining portions of the gas storage structure 50, excluding the hydrogen storage metal, can adsorb and store other gases.

[0133] Hydrogen storage metals are metals that can react with hydrogen and absorb it. The reaction process between hydrogen storage metals and hydrogen is as follows: First, hydrogen is catalyzed and decomposed into hydrogen atoms on the surface of the hydrogen storage metal. Then, the hydrogen atoms enter the interior of the hydrogen storage metal lattice to form metal hydrides, thus achieving the purpose of hydrogen storage.

[0134] The hydrogen storage metal can absorb hydrogen gas discharged from the battery cell 30. For example, the hydrogen absorption platform pressure of the hydrogen storage metal can be adapted to the battery cell 30 and the battery device 100, making it easier for the hydrogen storage metal to reach the hydrogen absorption platform pressure. This allows hydrogen gas to be absorbed at low pressure levels, i.e., when there is very little hydrogen, which can reduce the internal pressure of the battery device 100, reduce the deformation of the housing 10, reduce the risk of fire, flash explosion and ignition of the wiring harness inside the housing 10 of the battery device 100, and extend the life of the battery device 100.

[0135] For example, by selecting the material of the hydrogen storage metal, when the internal pressure near the gas storage structure 50 in the housing 10 is relatively low, the hydrogen absorption plateau pressure of the hydrogen storage metal can be achieved. By controlling the hydrogen absorption plateau pressure of the hydrogen storage metal to be low, the energy barrier for the combination of metal elements in the hydrogen storage metal and hydrogen atoms in the hydrogen gas is low. After the combination of each alloy element in the hydrogen storage metal and hydrogen atoms in the hydrogen gas, the structure tends to be stable, and the structure of the hydrogen storage metal is stable after combining with hydrogen in the hydrogen gas.

[0136] Understandably, the material composition of the aforementioned hydrogen storage metal can be determined using an X-ray diffractometer.

[0137] In the above technical solution, by setting a gas storage structure 50 inside the housing 10 of the battery device 100, and making the gas storage structure 50 located outside the battery cell 30, the gas discharged into the housing 10 during the operation of the battery cell 30, for example, the gas generated inside the battery cell 30 is discharged into the housing 10 through the pressure relief structure 31, can absorb and store the gas discharged into the housing 10 by the battery cell 30, such as hydrogen. This can reduce the internal pressure of the housing 10, reduce the deformation of the housing 10, reduce the risk of fire, flash explosion and ignition of the wire harness inside the housing 10 of the battery device 100, improve the reliability of the battery device 100, and extend the life of the battery device 100.

[0138] In some embodiments of this application, under standard conditions, each gram of the hydrogen storage metal can absorb 50 mL to 250 mL of hydrogen gas. For example, under standard conditions, the volume of hydrogen gas absorbed by each gram of the hydrogen storage metal can be 50 mL to 240 mL, 100 mL to 200 mL, 150 mL to 179 mL, 155 mL to 175 mL, 160 mL to 170 mL, 165 mL to 170 mL, etc. This allows the hydrogen storage metal to absorb a relatively large amount of hydrogen, thus enabling sufficient absorption of hydrogen gas generated by the battery cell 30 even with a low amount of added hydrogen storage metal. This reduces the internal pressure of the housing 10, decreases deformation of the housing 10, reduces the risk of fire, flash explosion, and ignition of the wiring harness inside the housing 10 of the battery device 100, improves the reliability of the battery device 100, and extends its lifespan. In other embodiments, under standard conditions, each gram of the hydrogen storage metal can absorb 50 mL to 180 mL of hydrogen gas.

[0139] As you can understand, standard temperature and pressure (STP), or simply "standard conditions" or "STP", refers to the conditions at 0°C and 101.325 kPa.

[0140] It is understood that "the volume of hydrogen that can be absorbed per gram of the hydrogen storage metal under standard conditions" is a well-known definition in the art and can be determined using methods known in the art, such as the following methods:

[0141] Add 1g of hydrogen storage metal to the stainless steel sample chamber. Purge the metal with hydrogen at a constant 5MPa hydrogen pressure for 2 hours. Then evacuate the sample for 30 minutes. Repeat the hydrogen purging-evacuation process at least three times to fully activate the hydrogen storage metal.

[0142] The amount of hydrogen absorbed by the alloy was determined using the H2PCT-1153 three-channel fully automated hydrogen storage material performance testing system (Yangzhou Yinghui Zhiyue).

[0143] In some embodiments, referring to Figures 3-5, at least a portion of the gas storage structure 50 is located on the side of the battery cell 30 where the pressure relief structure 31 is provided.

[0144] At least a portion of the gas storage structure 50 is located on the side of the battery cell 30 where the pressure relief structure 31 is provided. For example, a portion of the gas storage structure 50 may be located on the side of the battery cell 30 where the pressure relief structure 31 is provided, or the entire gas storage structure 50 may be located on the side of the battery cell 30 where the pressure relief structure 31 is provided.

[0145] In the above technical solution, by placing at least a portion of the gas storage structure 50 on the side of the battery cell 30 where the pressure relief structure 31 is provided, the gas storage structure 50 can be arranged adjacent to the pressure relief structure 31 of the battery cell 30. In this way, when the gas generated in the battery cell 30 is discharged outward into the housing 10 through the pressure relief structure 31, it can be absorbed by the gas storage structure 50 more quickly and timely, reducing the diffusion of the gas generated in the battery cell 30 after being discharged into the housing 10. This can better reduce the risk of fire, flash explosion and ignition of the wire harness inside the housing 10 of the battery device 100, and can better improve the reliability of the battery device 100.

[0146] In some embodiments, referring to Figures 3-5, at least a portion of the gas storage structure 50 is disposed opposite to the pressure relief structure 31.

[0147] In the above technical solution, with at least a portion of the gas storage structure 50 located on the side of the battery cell 30 where the pressure relief structure 31 is provided, and with at least a portion of the gas storage structure 50 positioned opposite to the pressure relief structure 31, the gas generated inside the battery cell 30 can be directly discharged toward the gas storage structure 50 when it is discharged outward through the pressure relief structure 31 into the housing 10. This allows the gas discharged from the battery cell 30 to be concentrated near the gas storage structure 50, enabling it to be quickly and promptly absorbed by the gas storage structure 50. This better reduces the diffusion of the gas generated by the battery cell 30 after it is discharged into the housing 10, thus better reducing the risk of fire, flash explosion, and ignition of the wire harness inside the housing 10 of the battery device 100, and better improving the reliability of the battery device 100.

[0148] In some embodiments, referring to Figures 3-6, the pressure relief structure 31 is located on top of the battery cell 30, and at least a portion of the gas storage structure 50 is located on the upper side of the battery cell 30.

[0149] The pressure relief structure 31 is located on the top of the battery cell 30, and the gas generated inside the battery cell 30, such as hydrogen, is discharged upward to the outside of the battery cell 30 through the pressure relief structure 31.

[0150] At least a portion of the gas storage structure 50 is located on the upper side of the battery cell 30. For example, a portion of the gas storage structure 50 may be located on the upper side of the battery cell 30, or the entire gas storage structure 50 may be located on the upper side of the battery cell 30.

[0151] In the above technical solution, by setting the pressure relief structure 31 on the top of the battery cell 30 and at least part of the gas storage structure 50 located on the upper side of the battery cell 30, the hydrogen gas discharged from the pressure relief structure 31 on the top of the battery cell 30 generally floats upwards due to the characteristic that the density of hydrogen gas is lower than that of air. By setting the gas storage structure 50 on the upper side of the battery cell 30, the gas storage structure 50 can be located in a position where hydrogen gas is more concentrated. This allows the gas storage structure 50 to quickly and fully absorb the hydrogen gas discharged from the battery cell 30, better reduce the internal pressure of the housing 10, reduce the deformation of the housing 10, and improve the reliability of the battery device 100.

[0152] In some embodiments, referring to Figures 3-5, at least some of the battery cells 30 in the battery cell assembly 20 share a gas storage structure 50.

[0153] At least some of the battery cells 30 in the battery cell assembly 20 share a gas storage structure 50. This can be either a partial sharing of the gas storage structure 50 among the battery cells 30 in the battery cell assembly 20 or a sharing of the gas storage structure 50 among all the battery cells 30 in the battery cell assembly 20.

[0154] For example, when the battery cell assembly 20 includes multiple battery cells 30 arranged in multiple rows, each row of battery cells 30 may share a gas storage structure 50, or multiple rows of battery cells 30 may all share a gas storage structure 50.

[0155] In the above technical solution, by having at least some of the battery cells 30 in the battery cell assembly 20 share a gas storage structure 50, the number of gas storage structures 50 can be reduced, and the assembly of the gas storage structures 50 can be facilitated.

[0156] In some embodiments, all battery cells 30 in the battery cell assembly 20 share a gas storage structure 50, and the number of gas storage structures 50 is the same as the number of battery cell assemblies 20 and they correspond one-to-one.

[0157] For example, there is one battery cell assembly 20 and one gas storage structure 50. The gas storage structure 50 can be set on the side of the battery cell 30 that has the pressure relief structure 31.

[0158] For example, there are multiple battery cell modules 20 and multiple gas storage structures 50. Each gas storage structure 50 corresponds to one of the multiple battery cell modules 20. Each gas storage structure 50 is located on the side of the corresponding battery cell module 20 that has a pressure relief structure 31.

[0159] In the above technical solution, by sharing a gas storage structure 50 with all the battery cells 30 in the battery cell assembly 20, the number of gas storage structures 50 can be reduced and the assembly of the gas storage structures 50 can be facilitated.

[0160] In other embodiments, all battery cell assemblies 20 within the housing 10 may share a single gas storage structure 50.

[0161] In some embodiments, referring to Figures 3-5, at least a portion of the gas storage structure 50 is sheet-like.

[0162] At least a portion of the gas storage structure 50 is sheet-like; for example, a portion of the gas storage structure 50 may be sheet-like, or the entire gas storage structure 50 may be sheet-like. The sheet-like nature of the gas storage structure 50 can include the following: the gas storage structure 50 may be provided with separately manufactured gas storage sheets or plates, or the gas storage structure 50 may be a coated structure.

[0163] In this configuration, the thickness direction of the gas storage structure 50 is aligned with the orientation of the pressure relief structure 31. For example, if the pressure relief structure 31 is located on top of the battery cell 30, the thickness direction of the gas storage structure 50 can be aligned with the vertical direction. For example, the vertical direction can be referred to as the Z direction in the attached figure.

[0164] In the above technical solution, by setting at least a portion of the gas storage structure 50 as a sheet, the surface area of ​​the gas storage structure 50 can be increased, thereby increasing the contact area between the gas storage structure 50 and the gas discharged from the battery cell 30. This is beneficial to improving the efficiency of the gas storage structure 50 in absorbing gases such as hydrogen, giving the gas storage structure 50 a larger gas storage capacity, and further extending the service life of the battery device 100.

[0165] In some embodiments, referring to Figures 3-5, the pressure relief structure 31 is disposed toward the gas storage structure 50 in the thickness direction of the gas storage structure 50.

[0166] For example, the pressure relief structure 31 is disposed on the top of the battery cell 30, the gas storage structure 50 is disposed on the upper side of the battery cell 30, the thickness direction of the gas storage structure 50 is consistent with the vertical direction, and the pressure relief structure 31 is disposed upward and facing the gas storage structure 50.

[0167] In the above technical solution, based on the gas storage structure 50 being set as a layered structure, the pressure relief structure 31 is arranged facing the gas storage structure 50 in the thickness direction of the gas storage structure 50. This allows the pressure relief structure 31 of the battery cell 30 to face the large surface side of the gas storage structure 50. In this way, the gas discharged from the battery cell 30 to the outside of the battery cell 30 and into the housing 10 through the pressure relief structure 31 can be directly discharged towards the large surface side of the gas storage structure 50. This allows the gas discharged from the battery cell 30 through the pressure relief structure 31 to directly contact the large surface side of the gas storage structure 50, which is beneficial to improving the efficiency of the gas discharged from the battery cell 30 being absorbed by the gas storage structure 50 and can better reduce the diffusion of the gas discharged from the battery cell 30 within the housing 10.

[0168] In some embodiments, referring to Figures 3 and 4, a first insulating layer 51 is provided between the gas storage structure 50 and the battery cell 30.

[0169] In the above technical solution, by providing a first insulating layer 51 between the gas storage structure 50 and the battery cell 30, insulation between the gas storage structure 50 and the battery cell 30 can be achieved, which can prevent electrical connection between the gas storage structure 50 and the battery cell 30 and prevent the gas storage structure 50 from short-circuiting multiple battery cells 30, thereby improving the reliability of the battery device 100.

[0170] In some embodiments, referring to Figures 3 and 4, the first insulating layer 51 is fixed to the gas storage structure 50.

[0171] For example, the first insulating layer 51 can be insulating adhesive, or it can be an insulating sheet, insulating film, or insulating paper.

[0172] In the above technical solution, by fixing the first insulating layer 51 to the gas storage structure 50, the gas storage structure 50 and the first insulating layer 51 can be integrated into one unit, which is convenient for installation and fixing.

[0173] In some embodiments, the first insulating layer 51 is a permeable layer that allows hydrogen gas to pass through.

[0174] In the above technical solution, by setting the first insulating layer 51 as a gas-permeable layer that can pass through hydrogen, while the first insulating layer 51 insulates and separates the gas storage structure 50 from the battery cell 30, the gas discharged by the battery cell 30 can come into contact with the gas storage structure 50 through the first insulating layer 51 and be absorbed by the gas storage structure 50, thereby reducing the impact of the first insulating layer 51 on the gas absorption efficiency of the gas storage structure 50.

[0175] In some embodiments, the first insulating layer 51 is a polyimide layer, a polyurethane layer, a polypropylene layer, a chlorinated polyethylene layer, or a polytetrafluoroethylene layer.

[0176] In the above technical solution, by setting the first insulating layer 51 as a polyimide layer, a polyurethane layer, a polypropylene layer, a chlorinated polyethylene layer, or a polytetrafluoroethylene layer, the first insulating layer 51 can have good air permeability, so that the gas discharged from the battery cell 30 can quickly pass through the first insulating layer 51 and come into contact with the gas storage structure 50 for absorption by the gas storage structure 50, and also makes the first insulating layer 51 have good insulation and heat resistance.

[0177] In some embodiments, referring to Figures 3 and 4, a receiving space 13 is defined between the housing 10 and the battery cell assembly 20, and at least a portion of the gas storage structure 50 is located within the receiving space 13.

[0178] For example, the housing 10 includes a first housing 11 and a second housing 12. The first housing 11 covers the upper side of the second housing 12, and the first housing 11 and the upper side of the battery cell assembly 20 define an accommodating space 13.

[0179] At least a portion of the gas storage structure 50 is located within the receiving space 13. This can be either a portion of the gas storage structure 50 being located within the receiving space 13 or the entire gas storage structure 50 being located within the receiving space 13.

[0180] In the above technical solution, by setting at least a portion of the gas storage structure 50 within the accommodating space 13 jointly defined by the housing 10 and the battery cell assembly 20, the gap space between the housing 10 and the battery cell assembly 20 can be fully utilized, making the overall structure of the battery device 100 compact. By setting the gas storage structure 50 within the housing 10 to absorb the gas, such as hydrogen, emitted by the battery cell 30, the overall energy density of the battery device 100 can be made higher.

[0181] In some embodiments, referring to Figures 3-7, the battery device 100 includes an integrated busbar 40, which is located within the housing 10 and within the accommodating space 13. The electrode leads 34 of the battery cells 30 are located on the side of the battery cells 30 facing the integrated busbar 40. The integrated busbar 40 includes a wiring harness 41, a conductive connector 42, and a sampling circuit board 43. The wiring harness 41 is an insulating component. The conductive connector 42 and the sampling circuit board 43 are both disposed on the wiring harness 41. The conductive connector 42 connects to the electrode leads 34 of adjacent battery cells 30. The sampling circuit board 43 is used to collect information from the battery cells 30. At least a portion of the gas storage structure 50 is integrated into the integrated busbar 40.

[0182] The integrated busbar (Cells Contact System), abbreviated as CCS, is an integral structure formed by integrating the sampling circuit board 43 and conductive connectors 42 onto the wire harness board 41. By setting up the integrated busbar 40, the assembly of the battery device 100 can be simplified. The integrated busbar 40 is assembled as an integral structure into the housing 10 and connected to the battery cells 30.

[0183] The sampling circuit board 43 and the conductive connector 42 can be fixed to the wire harness board 41 by riveting, or the sampling circuit board 43 and the conductive connector 42 can be fixed to the wire harness board 41 by heat pressing.

[0184] The wire harness board 41 can be a plastic board, for example, the wire harness board 41 can have good insulation, heat resistance and good structural strength.

[0185] The sampling circuit board 43 can be disposed on the side of the wire harness plate 41 facing the battery cell assembly 20. The sampling circuit board 43 is electrically connected to the battery cell 30 and is used to collect at least one of the following information: temperature, voltage and current of the battery cell 30.

[0186] The sampling circuit board 43 can be a flexible circuit board.

[0187] For example, the sampling circuit board 43 includes a sampling conductive layer 431, a second insulating layer 432, and a third insulating layer 433, with the second insulating layer 432 and the third insulating layer 433 disposed on opposite sides of the sampling conductive layer 431 in the thickness direction. The sampling conductive layer 431 is electrically connected to the battery cell 30 and is used to collect at least one of the following information: temperature, voltage, and current of the battery cell 30. For example, the sampling conductive layer 431 can be a copper layer or an aluminum layer.

[0188] The conductive connector 42 can be disposed on the side of the wire harness plate 41 facing the battery cell assembly 20. The conductive connector 42 connects to the electrode lead-out end 34 of the adjacent battery cell 30 to realize the series or parallel connection of the adjacent battery cells 30. The conductive connector 42 and the electrode lead-out end 34 can be welded together. The conductive connector 42 can be a conductive sheet, which can be a copper sheet or an aluminum sheet.

[0189] The sampling circuit board 43 and the conductive connector 42 can both be disposed on the side of the wire harness plate 41 facing the battery cell 30. For example, the electrode lead-out end 34 of the battery cell 30 is disposed on the top of the battery cell 30, the integrated busbar 40 is disposed on the upper side of the battery cell assembly 20, and the sampling circuit board 43 and the conductive connector 42 can both be disposed on the lower side of the wire harness plate 41.

[0190] For example, when the battery cell assembly 20 includes multiple battery cells 30 arranged in multiple rows, there can be multiple conductive connectors 42, which can be arranged in multiple rows. Each row of conductive connectors 42 corresponds to one of the multiple battery cells 30 in that row, and each row of conductive connectors 42 connects to the electrode leads 34 of two adjacent battery cells 30 in the corresponding row. A single integrated busbar 40 may include one or more sampling circuit boards 43, which can be disposed between two adjacent rows of conductive connectors 42.

[0191] In the above technical solution, by integrating the gas storage structure 50 onto the integrated busbar 40 of the battery device 100, the gas storage structure 50 and the integrated busbar 40 are integrated into a whole structure. While setting the gas storage structure 50 inside the housing 10 of the battery device 100, it is beneficial to simplify the overall structure of the battery device 100, and also to facilitate the rapid installation of the gas storage structure 50 and the integrated busbar 40. It is convenient to assemble the gas storage structure 50 and the integrated busbar 40 into the housing 10 as a whole structure, which is beneficial to improve the assembly efficiency of the battery device 100.

[0192] In some embodiments, referring to Figures 3-7, the gas storage structure 50 integrated into the integrated busbar 40 is formed in a sheet-like shape, and the thickness direction of the gas storage structure 50 integrated into the integrated busbar 40 is consistent with the thickness direction of the integrated busbar 40.

[0193] The gas storage structure 50 is formed in a sheet-like shape. The gas storage structure 50 can be a gas storage sheet or a gas storage plate. The gas storage structure 50 is fixed to the integrated busbar 40 by adhesive or riveting. The gas storage structure 50 can also be a coating structure. The gas storage structure 50 can be applied to the integrated busbar 40 by coating.

[0194] For example, the integrated busbar 40 is located on the upper side of the battery cell assembly 20, and the thickness direction of the integrated busbar 40 is consistent with the vertical direction. The thickness direction of the gas storage structure 50 is also consistent with the vertical direction.

[0195] In the above technical solution, by setting the gas storage structure 50 integrated into the integrated busbar 40 as a layered structure, the surface area of ​​the gas storage structure 50 can be increased, thereby increasing the contact area between the gas storage structure 50 and the gas discharged from the battery cell 30. This is beneficial to improving the efficiency of the gas storage structure 50 in absorbing gases such as hydrogen, giving the gas storage structure 50 a larger gas storage capacity, and further extending the service life of the battery device 100. Furthermore, by setting the gas storage structure 50 integrated into the integrated busbar 40 as a layered structure, the gas storage structure 50 integrated into the integrated busbar 40... The thickness direction of 0 is consistent with the thickness direction of the integrated busbar 40. This can make full use of the flat structural feature of the integrated busbar 40, allowing the gas storage structure 50 to be set with a larger size and a larger surface area, thereby improving the gas absorption efficiency and gas storage capacity of the gas storage structure 50. Furthermore, the overall thickness of the gas storage structure 50 after integration with the integrated busbar 40 will not increase significantly. This makes at least part of the gas storage structure 50 more compact with the overall structure after integration with the integrated busbar 40, reducing the utilization of space inside the housing 10 and facilitating the arrangement of other components such as the battery cell 30 inside the housing 10.

[0196] In some embodiments, referring to Figures 3-5, the pressure relief structure 31 is provided on the side of the battery cell 30 facing the integrated busbar 40.

[0197] For example, the electrode lead-out end 34 of the battery cell 30 is located on the top of the battery cell 30, the integrated busbar 40 is located on the upper side of the battery cell assembly 20, and the pressure relief structure 31 is located on the upper side of the battery cell 30.

[0198] In the above technical solution, by setting the pressure relief structure 31 on the side of the battery cell 30 facing the integrated busbar 40, the gas discharged from the battery cell 30 through the pressure relief structure 31 can be directly discharged to the integrated busbar 40. Since the gas storage structure 50 is integrated on the integrated busbar 40, the gas discharged from the battery cell 30 can be concentrated near the gas storage structure 50, so that it can be quickly and timely absorbed by the gas storage structure 50. This better reduces the diffusion of the gas generated by the battery cell 30 after it is discharged into the housing 10, and can better reduce the risk of fire, flash explosion and ignition of the wire harness inside the housing 10 of the battery device 100, and can better improve the reliability of the battery device 100.

[0199] In some embodiments, referring to Figures 3 and 4, at least a portion of the gas storage structure 50 is located on the side of the integrated busbar 40 facing the battery cell 30.

[0200] At least a portion of the gas storage structure 50 is located on the side of the integrated busbar 40 facing the battery cell 30. This can be either a portion of the gas storage structure 50 being located on the side of the integrated busbar 40 facing the battery cell 30, or the entire gas storage structure 50 being located on the side of the integrated busbar 40 facing the battery cell 30.

[0201] For example, the electrode lead-out end 34 of the battery cell 30 is disposed on the top of the battery cell 30, the integrated busbar 40 is disposed on the upper side of the battery cell assembly 20, and at least a portion of the gas storage structure 50 is disposed on the lower side of the integrated busbar 40.

[0202] In the above technical solution, by placing at least a portion of the gas storage structure 50 on the side of the integrated busbar 40 facing the battery cell 30, the distance between the gas storage structure 50 and the pressure relief structure 31 can be made closer. In this way, when the gas generated in the battery cell 30 is discharged outward through the pressure relief structure 31 into the housing 10, it can be discharged directly toward the gas storage structure 50. This allows the gas discharged from the battery cell 30 to be concentrated near the gas storage structure 50, so that it can be quickly and timely absorbed by the gas storage structure 50. This better reduces the diffusion of the gas generated by the battery cell 30 after it is discharged into the housing 10, and can better reduce the risk of fire, flash explosion and ignition of the wire harness inside the housing 10 of the battery device 100, and can better improve the reliability of the battery device 100.

[0203] In some embodiments, referring to Figures 3 and 4, a receiving gap 44 is defined between the wiring harness 41 and the battery cell assembly 20, the pressure relief structure 31 faces the receiving gap 44, and at least a portion of the gas storage structure 50 is located within the receiving gap 44.

[0204] At least a portion of the gas storage structure 50 is located within the receiving gap 44. For example, a portion of the gas storage structure 50 may be located within the receiving gap 44, or the entire gas storage structure 50 may be located within the receiving gap 44.

[0205] For example, the integrated busbar 40 is disposed on the upper side of the battery cell assembly 20, and the wiring harness plate 41 of the integrated busbar 40 and the top of the battery cell assembly 20 define the aforementioned accommodating gap 44.

[0206] In the above technical solution, by positioning at least a portion of the gas storage structure 50 between the wiring harness plate 41 and the battery cell assembly 20 to define a receiving gap 44, and by positioning the pressure relief structure 31 toward the receiving gap 44, the gas discharged from the battery cell 30 through the pressure relief structure 31 can be directly discharged into the receiving gap 44. Furthermore, the integrated busbar 40 can prevent the gas discharged from the battery cell 30 through the pressure relief structure 31 into the receiving gap 44 from diffusing within the housing 10. This concentrates the gas discharged from the battery cell 30 within the receiving gap 44, allowing the gas storage structure 50 located within the receiving gap 44 to quickly and effectively absorb the gas discharged from the battery cell 30, thereby better reducing the risk caused by the diffusion of hydrogen discharged from the battery cell 30 within the housing 10.

[0207] In some embodiments, referring to Figures 3 and 4, at least a portion of the gas storage structure 50 is disposed on at least one of the wire harness plate 41, the sampling circuit board 43, and the conductive connector 42.

[0208] At least a portion of the gas storage structure 50 is disposed on at least one of the wire harness plate 41, the sampling circuit board 43, and the conductive connector 42, including the following cases:

[0209] For example, a portion of the gas storage structure 50 is disposed on the wire harness plate 41, and a portion of the gas storage structure 50 is disposed on other components excluding the integrated busbar 40; for example, the entire gas storage structure 50 is disposed on the wire harness plate 41.

[0210] For example, a portion of the gas storage structure 50 is disposed on the sampling circuit board 43, and a portion of the gas storage structure 50 is disposed on other components excluding the integrated busbar 40; for example, the entire gas storage structure 50 is disposed on the sampling circuit board 43.

[0211] For example, a portion of the gas storage structure 50 is disposed on the conductive connector 42, and a portion of the gas storage structure 50 is disposed on other components excluding the integrated busbar 40; for example, the entire gas storage structure 50 is disposed on the conductive connector 42.

[0212] For example, a portion of the gas storage structure 50 is disposed on the wire harness plate 41 and the sampling circuit board 43, and a portion of the gas storage structure 50 is disposed on other components excluding the integrated busbar 40; for example, the entire gas storage structure 50 is disposed on the wire harness plate 41 and the sampling circuit board 43.

[0213] For example, a portion of the gas storage structure 50 is disposed on the wire harness plate 41 and the conductive connector 42, and a portion of the gas storage structure 50 is disposed on other components excluding the integrated busbar 40; for example, the entire gas storage structure 50 is disposed on the wire harness plate 41 and the conductive connector 42.

[0214] For example, a portion of the gas storage structure 50 is disposed on the conductive connector 42 and the sampling circuit board 43, and a portion of the gas storage structure 50 is disposed on other components excluding the integrated busbar 40; for example, the entire gas storage structure 50 is disposed on the conductive connector 42 and the sampling circuit board 43.

[0215] For example, a portion of the gas storage structure 50 is disposed on the wire harness plate 41, the sampling circuit board 43, and the conductive connector 42, while a portion of the gas storage structure 50 is disposed on other components excluding the integrated busbar 40; for example, the entire gas storage structure 50 is disposed on the wire harness plate 41, the sampling circuit board 43, and the conductive connector 42.

[0216] In the above technical solution, by placing at least a portion of the gas storage structure 50 on at least one of the wire harness board 41, the sampling circuit board 43, and the conductive connector 42, at least one of the wire harness board 41, the sampling circuit board 43, and the conductive connector 42 in the integrated busbar 40 can be used as a carrier for the gas storage structure 50, which facilitates the installation of the gas storage structure 50.

[0217] In some embodiments, referring to Figures 3-8, at least a portion of the gas storage structure 50 is integrated into the sampling circuit board 43.

[0218] In the above technical solution, by integrating at least a portion of the gas storage structure 50 onto the sampling circuit board 43, the larger surface area of ​​the sampling circuit board 43 can be utilized to facilitate the placement of the gas storage structure 50. This also allows the gas storage structure 50 to be configured as a layered structure with a large surface area. Furthermore, integrating at least a portion of the gas storage structure 50 onto the sampling circuit board has minimal impact on the sampling circuit board 43. Additionally, integrating at least a portion of the gas storage structure 50 with the sampling circuit board 43 into a single structure facilitates the assembly of the gas storage structure 50 and the sampling circuit board 43 onto the wiring harness board 41.

[0219] In some embodiments, referring to Figures 3-8, at least a portion of the gas storage structure 50 is disposed on the side of the sampling circuit board 43 facing the battery cell 30.

[0220] The sampling circuit board 43 is disposed on the side of the wire harness plate 41 facing the battery cell assembly 20, and the gas storage structure 50 is disposed on the side of the sampling circuit board facing the battery cell 30. The gas storage structure 50 may be in the form of a sheet, and the thickness direction of the gas storage structure 50 is consistent with the thickness direction of the sampling circuit board 43.

[0221] For example, the integrated busbar 40 is positioned above the battery cell assembly 20, the sampling circuit board 43 is positioned below the wire harness plate 41, and the gas storage structure 50 is positioned below the sampling circuit board 43. The gas storage structure 50 can be in a layered shape, and the thickness direction of the gas storage structure 50 and the thickness direction of the sampling circuit board 43 are both aligned with the vertical direction.

[0222] In the above technical solution, by arranging at least a portion of the gas storage structure 50 on the side of the sampling circuit board 43 facing the battery cell 30, the distance between the gas storage structure 50 and the battery cell 30 can be reduced. This allows the gas discharged from the battery cell 30 to be located near the gas storage structure 50, facilitating its rapid absorption and storage. For example, when the pressure relief structure 31 of the battery cell 30 is located on the side of the battery cell 30 facing the integrated busbar 40, the gas discharged from the battery cell 30 through the pressure relief structure 31 can be directly discharged towards the gas storage structure 50. This facilitates the rapid absorption of the gas discharged from the battery cell 30 by the gas storage structure 50, reducing the diffusion of the gas discharged from the battery cell 30 within the housing 10.

[0223] In some embodiments, referring to FIG9, the sampling circuit board 43 includes a sampling conductive layer 431, a second insulating layer 432 and a third insulating layer 433. The second insulating layer 432 and the third insulating layer 433 are disposed on opposite sides of the sampling conductive layer 431 in the thickness direction. The second insulating layer 432 is located on the side of the sampling conductive layer 431 closer to the battery cell 30. At least a portion of the gas storage structure 50 is disposed between the sampling conductive layer 431 and the second insulating layer 432.

[0224] For example, the integrated busbar 40 is disposed on the upper side of the battery cell assembly 20, and the sampling conductive layer 431, the second insulating layer 432 and the third insulating layer 433 of the sampling circuit board 43 are stacked in the vertical direction, with the second insulating layer 432 disposed on the lower side of the sampling conductive layer 431 and the third insulating layer 433 disposed on the upper side of the sampling conductive layer 431.

[0225] For example, the second insulating layer 432 is a polyimide layer, and the third insulating layer 433 is a polyimide layer.

[0226] For example, the sampling conductive layer 431 can be a copper layer or an aluminum layer.

[0227] At least a portion of the gas storage structure 50 is disposed between the sampling conductive layer 431 and the second insulating layer 432. This can be either a portion of the gas storage structure 50 being disposed between the sampling conductive layer 431 and the second insulating layer 432, or the entire gas storage structure 50 being disposed between the sampling conductive layer 431 and the second insulating layer 432.

[0228] For example, the gas storage structure 50 located between the sampling conductive layer 431 and the second insulating layer 432 can be in the form of a sheet.

[0229] In the above technical solution, by integrating at least a portion of the gas storage structure 50 onto the sampling circuit board 43 and placing at least a portion of the gas storage structure 50 between the sampling conductive layer 431 and the second insulating layer 432 of the sampling circuit board 43, the gas storage structure 50 and the sampling circuit board 43 can be integrated into a whole structure without significantly increasing the thickness of the sampling circuit board 43. The first insulating layer 51 can also be omitted, and the second insulating layer 432 can play the role of the first insulating layer 51.

[0230] In some embodiments, the second insulating layer 432 is a permeable layer that allows hydrogen to pass through.

[0231] In the above technical solution, by setting the second insulating layer 432 as a gas-permeable layer that can pass through hydrogen, the second insulating layer 432 can insulate and separate the gas storage structure 50 and the sampling conductive layer 431 from the battery cell 30. At the same time, the gas discharged from the battery cell 30 can come into contact with the gas storage structure 50 through the second insulating layer 432 and be absorbed by the gas storage structure 50, thereby reducing the impact of the second insulating layer 432 on the gas absorption efficiency of the gas storage structure 50.

[0232] In some embodiments, referring to FIG10, the sampling circuit board 43 includes a sampling conductive layer 431, a second insulating layer 432 and a third insulating layer 433. The second insulating layer 432 and the third insulating layer 433 are disposed on opposite sides of the sampling conductive layer 431 in the thickness direction. The second insulating layer 432 is located on the side of the sampling conductive layer 431 closer to the battery cell 30. At least a portion of the gas storage structure 50 is composed of the sampling conductive layer 431.

[0233] For example, the integrated busbar 40 is disposed on the upper side of the battery cell assembly 20, and the sampling conductive layer 431, the second insulating layer 432 and the third insulating layer 433 of the sampling circuit board 43 are stacked in the vertical direction, with the second insulating layer 432 disposed on the lower side of the sampling conductive layer 431 and the third insulating layer 433 disposed on the upper side of the sampling conductive layer 431.

[0234] At least a portion of the gas storage structure 50 is composed of the sampling conductive layer 431. This means that either a portion of the gas storage structure 50 is composed of the sampling conductive layer 431, or the entire gas storage structure 50 is composed of the sampling conductive layer 431.

[0235] The sampling conductive layer 431 may be partially or entirely made of a hydrogen storage metal. For example, the hydrogen storage metal used to make the sampling conductive layer 431 may have good electrical and thermal conductivity. For example, the hydrogen storage metal used to make the sampling conductive layer 431 may include at least one of titanium-based alloys and palladium-based alloys.

[0236] In the above technical solution, by making the sampling conductive layer 431 of the sampling circuit board 43 constitute at least part of the gas storage structure 50, the sampling conductive layer 431 can not only play the role of collecting information of the battery cell 30, but also make the sampling conductive layer 431 have the function of gas absorption and gas storage. This eliminates the need for an additional separately set gas storage structure 50, and the sampling circuit board 43 can simultaneously have the functions of sampling information and gas absorption and storage.

[0237] In some embodiments, at least one of the second insulating layer 432 and the third insulating layer 433 is a gas-permeable layer that allows hydrogen to pass through.

[0238] For example, the second insulating layer 432 is a permeable layer that allows hydrogen to pass through; or, the third insulating layer 433 is a permeable layer that allows hydrogen to pass through; or, both the second insulating layer 432 and the third insulating layer 433 are permeable layers that allow hydrogen to pass through.

[0239] In the above technical solution, by setting at least one of the second insulating layer 432 and the third insulating layer 433 as a gas-permeable layer that can pass through hydrogen, while the second insulating layer 432 insulates and separates the gas storage structure 50 and the sampling conductive layer 431 from the battery cell 30, the gas emitted by the battery cell 30 can contact the gas storage structure 50 through the second insulating layer 432 and / or the third insulating layer 433, and thus be absorbed by the gas storage structure 50, reducing the impact of the second insulating layer 432 and / or the third insulating layer 433 on the gas absorption efficiency of the gas storage structure 50.

[0240] In some embodiments, referring to Figures 3-7, the electrode lead-out end 34 and the pressure relief structure 31 of the battery cell 30 are both located on the top of the battery cell 30, and the integrated busbar 40 is located on the upper side of the battery cell assembly 20.

[0241] In the above technical solution, by setting the electrode lead-out end 34 on the top of the battery cell 30 and setting the integrated busbar 40 on the upper side of the battery cell assembly 20, it is convenient to connect the integrated busbar 40 and the electrode lead-out end 34. Furthermore, by setting the pressure relief structure 31 on the top of the battery cell 30 and integrating the gas storage structure 50 on the integrated busbar 40 on the upper side of the battery cell assembly 20, taking advantage of the fact that the density of hydrogen is less than that of air, the hydrogen gas discharged from the pressure relief structure 31 on the top of the battery cell 30 generally floats upward. By setting the gas storage structure 50 on the integrated busbar 40 located on the upper side of the battery cell 30, the gas storage structure 50 can be located on the upper side of the battery cell 30, thereby placing the gas storage structure 50 in a position where hydrogen is more concentrated. This allows the gas storage structure 50 to quickly and fully absorb the hydrogen gas discharged from the battery cell 30, better reduce the internal pressure of the housing 10, reduce the deformation of the housing 10, and improve the reliability of the battery device 100.

[0242] In some embodiments, the battery device 100 includes a sampling circuit board 43 located within the housing 10 and within the accommodating space 13. The sampling circuit board 43 is used to collect information from the battery cells 30, and at least a portion of the gas storage structure 50 is integrated into the sampling circuit board 43.

[0243] The sampling circuit board 43 is electrically connected to the battery cell 30. The sampling circuit board 43 is used to collect at least one of the following information from the battery cell 30: temperature, voltage, and current.

[0244] The sampling circuit board 43 can be a flexible circuit board.

[0245] For example, the sampling circuit board 43 includes a sampling conductive layer 431, a second insulating layer 432, and a third insulating layer 433, with the second insulating layer 432 and the third insulating layer 433 disposed on opposite sides of the sampling conductive layer 431 in the thickness direction. The sampling conductive layer 431 is electrically connected to the battery cell 30 and is used to collect at least one of the following information: temperature, voltage, and current of the battery cell 30. For example, the sampling conductive layer 431 can be a copper layer or an aluminum layer.

[0246] At least a portion of the gas storage structure 50 is integrated into the sampling circuit board 43. This means that either a portion of the gas storage structure 50 is integrated into the sampling circuit board 43, or the entire gas storage structure 50 is integrated into the sampling circuit board 43.

[0247] For example, the pressure relief structure 31 and the electrode lead-out end 34 are disposed on the top of the battery cell 30, the sampling circuit board 43 is disposed on the upper side of the battery cell 30, and at least a portion of the gas storage structure 50 is integrated on the sampling circuit board 43 and located on the upper side of the battery cell 30, such that at least a portion of the gas storage structure 50 is located on the upper side of the battery cell 30 and at least a portion of the gas storage structure 50 is disposed adjacent to the pressure relief structure 31, thereby facilitating the rapid and sufficient absorption of hydrogen gas discharged from the pressure relief structure 31 by the gas storage structure 50, and reducing the risk of hydrogen gas gas discharged from the battery cell 30 spreading within the housing 10.

[0248] The gas storage structure 50 integrated into the sampling circuit board 43 can be in the form of a sheet.

[0249] For example, at least a portion of the gas storage structure 50 may be disposed on the side of the sampling circuit board 43 facing the battery cell assembly 20.

[0250] For example, at least a portion of the gas storage structure 50 is disposed between the sampling conductive layer 431 and the second insulating layer 432.

[0251] For example, at least a portion of the gas storage structure 50 is composed of a sampling conductive layer 431.

[0252] In the above technical solution, by integrating the gas storage structure 50 onto the sampling circuit board 43, the larger surface area of ​​the sampling circuit board 43 can be utilized to facilitate the setting of the gas storage structure 50. This also allows the gas storage structure 50 to be configured as a layered structure with a large surface area. Furthermore, integrating the gas storage structure 50 onto the sampling circuit board has virtually no impact on the sampling circuit board 43. In addition, integrating the gas storage structure 50 and the sampling circuit board 43 into a single structure facilitates their integration into the housing 10 before assembly.

[0253] In some embodiments, the battery device 100 includes a conductive connector 42 located within the housing 10 and within the accommodating space 13. The conductive connector 42 is connected to the electrode lead-out end 34 of an adjacent battery cell 30, and at least a portion of the gas storage structure 50 is integrated into the conductive connector 42.

[0254] The conductive connector 42 connects to the electrode leads 34 of adjacent battery cells 30 to achieve series or parallel connection of adjacent battery cells 30. The conductive connector 42 and the electrode leads 34 can be welded together. The conductive connector 42 can be a conductive sheet, which can be a copper sheet or an aluminum sheet.

[0255] For example, the pressure relief structure 31 and the electrode lead-out end 34 are disposed on the top of the battery cell 30, the conductive connector 42 is disposed on the upper side of the battery cell 30, and at least a portion of the gas storage structure 50 is integrated on the conductive connector 42 and located on the upper side of the battery cell 30, such that at least a portion of the gas storage structure 50 is located on the upper side of the battery cell 30 and at least a portion of the gas storage structure 50 is disposed adjacent to the pressure relief structure 31, thereby facilitating the rapid and sufficient absorption of hydrogen gas discharged from the pressure relief structure 31 by the gas storage structure 50, and reducing the risk of hydrogen gas gas discharged from the battery cell 30 spreading within the housing 10.

[0256] The gas storage structure 50 integrated into the conductive connector 42 can be in the form of a sheet, for example, the gas storage structure 50 integrated into the conductive connector 42 can be coated.

[0257] For example, at least a portion of the gas storage structure 50 is composed of a conductive connector 42. For example, the hydrogen storage metal used to make the conductive connector 42 may possess good electrical and thermal conductivity. For example, the hydrogen storage metal used to make the conductive connector 42 may include at least one of a titanium-based alloy and a palladium-based alloy.

[0258] In the above technical solution, by integrating the gas storage structure 50 onto the conductive connector 42, and by using a large number of conductive connectors 42, the gas storage structure 50 can have more carriers, thereby allowing the gas storage structure 50 to be arranged in more positions and in greater numbers, and enabling the gas storage structure 50 to have a larger overall gas intake efficiency and gas storage capacity.

[0259] In some embodiments, the pressure relief structure 31 includes a waterproof and breathable membrane 311, which can be permeated with hydrogen gas.

[0260] In the above technical solution, by setting the pressure relief structure 31 as a waterproof and breathable membrane 311, the waterproof and breathable membrane 311 can both allow air to pass through and prevent liquids such as water outside the battery cell 30 from entering the interior of the battery cell 30. Under normal working conditions, the gas generated inside the battery cell 30, such as hydrogen, can be discharged to the outside of the battery cell 30 and into the housing 10 in a timely manner through the waterproof and breathable membrane 311, so that it can be absorbed and stored by the gas storage structure 50 located inside the housing 10.

[0261] In some embodiments, the battery cell 30 is configured as an alkali metal battery.

[0262] Alkali metal batteries are batteries that achieve cycling by depositing and consuming alkali metals at the negative electrode. When preparing the negative electrode, an alkali metal layer may or may not be formed (a battery without a negative electrode). In addition, the active metals in alkali metal batteries are not limited to lithium, sodium, and potassium, but may also include other active metals such as zinc and aluminum.

[0263] In the above technical solution, by setting the battery cell 30 as an alkali metal battery, the battery cell 30 can have a high energy density. Furthermore, by setting a gas storage structure 50 inside the housing 10, the gas such as hydrogen discharged into the housing 10 during the operation of the battery cell 30 can be absorbed and stored, thereby reducing the internal pressure of the housing 10, reducing the deformation of the housing 10, improving the reliability of the battery device 100, and extending the service life of the battery device 100.

[0264] In some embodiments, the electrode assembly 33 includes a negative electrode sheet, which includes a negative current collector and an active material layer disposed on at least one side of the negative current collector, the active material layer including an elemental active metal.

[0265] Active metals refer to metals that can provide active metal ions. For example, the active metal in lithium-alkali metal batteries is elemental lithium, and the active metal in sodium-alkali metal batteries is elemental sodium. Specifically, alkali metal batteries are batteries that use active metals as negative electrodes, such as lithium metal and sodium metal. In these types of alkali metal batteries, the active metal ions on the negative electrode, such as lithium and sodium, are relatively active and will undergo side reactions with water, solvents in the electrolyte, and residual alkali in the positive electrode active material, resulting in a large amount of gas production, with hydrogen accounting for >90% of the gas. For batteries that mainly produce hydrogen gas, a gas storage structure 50 is provided in the housing 10 of the battery device 100 to absorb the hydrogen gas discharged from the battery cells 30 into the housing 10.

[0266] In the above technical solution, by making the active material layer of the negative electrode sheet include active metal elements, the battery cell 30 can have a high energy density. Since the active metal elements will react with the electrolyte in the battery cell 30 to produce gas, such as a large amount of hydrogen, by setting a gas storage structure 50 in the housing 10, the gas, such as hydrogen, discharged into the housing 10 during the operation of the battery cell 30 can be absorbed and stored, thereby reducing the internal pressure of the housing 10, reducing the deformation of the housing 10, improving the reliability of the battery device 100, and extending the service life of the battery device 100.

[0267] In some embodiments of this application, the active material layer comprises an alloy formed of an active metal, and the lithium metal battery comprises a lithium metal alloy with the chemical formula LiR, wherein R comprises at least one of tin, zinc, aluminum, magnesium, silver, gold, gallium, indium, platinum, boron, carbon, or silicon.

[0268] In some embodiments of this application, when a lithium metal negative electrode sheet is used, the preparation method is as follows: lithium foil or lithium metal alloy is coated onto the current collector by single-sided rolling, and then cut into negative electrode sheets.

[0269] In some other embodiments of this application, the sodium metal battery includes a sodium metal alloy with the chemical formula NaR1, wherein R1 includes at least one of tin, zinc, aluminum, magnesium, silver, gold, gallium, indium, platinum, boron, carbon, or silicon.

[0270] In some other embodiments of this application, when a sodium metal negative electrode sheet is used, the preparation method is as follows: sodium foil or sodium metal alloy is coated onto the current collector by single-sided rolling, and then cut into negative electrode sheets.

[0271] In some embodiments of this application, the negative electrode sheet includes a negative current collector and an interface modification layer disposed on at least one side of the negative current collector. The interface modification layer includes a first binder and a conductive agent. That is, the negative electrode sheet does not contain alkali metal, and the prepared battery is called a negative electrode-free battery. The setting of the interface modification layer can make the active metal (alkali metal) uniformly deposited on the surface of the interface modification layer, thereby improving the cycle performance of the battery.

[0272] It's understandable that a "negative electrode-free battery" refers to a battery where no negative electrode active material is added during the battery manufacturing stage. However, a negative electrode current collector is still present. A negative electrode-free battery is simply a special type of alkali metal battery (such as lithium metal batteries or sodium metal batteries), not one that truly lacks a negative electrode. In actual operation, the negative electrode still contains an active metal (such as lithium metal or sodium metal). The negative electrode in a negative electrode-free battery includes a bare negative electrode current collector (such as copper). Taking a lithium battery as an example, during charging, active metal ions such as Li+ are released from the positive electrode and deposited on the negative electrode current collector, forming a lithium negative electrode. During subsequent battery discharge, the deposited lithium metal dissolves and is re-intercalated into the positive electrode.

[0273] In some embodiments, the active metal element includes at least one of lithium, sodium, potassium, zinc, or aluminum.

[0274] For example, alkali metal batteries include at least one of lithium metal batteries, sodium metal batteries, potassium metal batteries, zinc metal batteries, or aluminum metal batteries.

[0275] In the above technical solution, by using an elemental active metal including at least one of lithium, sodium, potassium, zinc, or aluminum, which is relatively reactive and will undergo side reactions with the electrolyte, producing a large amount of gas with a hydrogen content greater than 90%, a gas storage structure 50 is provided inside the housing 10 for the battery cell 30, which mainly produces hydrogen gas. This structure can absorb and store the gas, such as hydrogen, discharged into the housing 10 during the operation of the battery cell 30, thereby reducing the internal pressure of the housing 10, reducing the deformation of the housing 10, improving the reliability of the battery device 100, and extending the service life of the battery device 100.

[0276] In some embodiments, the electrolyte of the battery cell 30 includes a solvent, which is configured as at least one of an ether solvent or an ester solvent.

[0277] Ether solvents are organic solvents containing ether groups, while ester solvents are organic solvents containing ester groups.

[0278] In the above technical solution, by setting the solvent in the electrolyte of the battery cell 30 to at least one of ether solvent or ester solvent, the ether solvent and ester solvent have good compatibility with the hydrogen storage metal in the gas storage structure 50, and hydrogen gas is generated during the cycle of the battery cell 30. The hydrogen gas discharged from the battery cell 30 into the housing 10 can be better absorbed and stored by the hydrogen storage metal, reducing the internal pressure of the housing 10, reducing the deformation of the housing 10, improving the reliability of the battery device 100, and extending the service life of the battery device 100.

[0279] In some embodiments, the solvent includes ether solvents, which include at least one of 1,2-dimethoxypropane, dimethoxymethane, ethylene glycol dimethyl ether, tetrahydrofuran, 2-methyltetrahydrofuran, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, pentaethylene glycol dimethyl ether, polyethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol diethyl ether, triethylene glycol diethyl ether, tetraethylene glycol diethyl ether, pentaethylene glycol diethyl ether, ethylene glycol dibutyl ether, diethylene glycol dibutyl ether, or 1,3-dioxane.

[0280] In the above technical solution, hydrogen gas is generated during the cycle of the battery cell 30. The generated hydrogen gas can be better absorbed and stored by the hydrogen storage metal. The hydrogen gas discharged from the battery cell 30 into the housing 10 can be better absorbed and stored by the hydrogen storage metal, reducing the internal pressure of the housing 10, reducing the deformation of the housing 10, improving the reliability of the battery device 100, and extending the service life of the battery device 100.

[0281] In some embodiments of this application, the density of the hydrogen storage metal is 3 g / cm³. 2 ~8.5g / cm 2 For example, the density of hydrogen storage metals can be 3 g / cm³. 2 ~8.4g / cm 2 4g / cm 2 ~8.3g / cm 2 5g / cm 2 ~8.2g / cm2, 6g / cm 2 ~8.1g / cm 2 7g / cm 2 ~8g / cm 2 By controlling the density of the hydrogen storage metal within the above range, the hydrogen absorption capacity of the metal can be improved, allowing it to fully absorb the hydrogen gas produced by the alkali metal battery, reducing the internal pressure of the battery cell 30, and extending its lifespan. Furthermore, it can reduce the impact of excessively high density on the energy density of the battery cell 30.

[0282] It is understood that the "density of hydrogen storage metals" is a well-known definition in the art and can be determined using methods known in the art, such as the following methods:

[0283] The density was measured using an INSTRUQUEST IQIPYC true density meter (USA).

[0284] In some embodiments of this application, the operating temperature of the hydrogen storage metal is -40℃ to 60℃. For example, the operating temperature of the hydrogen storage metal can be -40℃ to 59℃, -30℃ to 50℃, -20℃ to 40℃, -10℃ to 30℃, 0℃ to 20℃, 10℃ to 15℃, etc. Specifically, the operating temperature of the hydrogen storage metal refers to the temperature at which the hydrogen storage metal can absorb hydrogen gas. Controlling the operating temperature of the hydrogen storage metal within the above range allows the battery to adapt to low-temperature and high-temperature operating environments. In other embodiments of this application, the operating temperature of the hydrogen storage metal is 0℃ to 45℃.

[0285] In some embodiments, the hydrogen storage metal includes at least one of zirconium alloys, magnesium alloys, titanium alloys, vanadium alloys, or LaxNiyMz, wherein M includes at least one of Zr, Mn, Mg, Zn, Al, Ti, Fe, Cu, Co, Y, Ca, or Bi, and 0 < x ≤ 2, 0 ≤ y ≤ 7, and 0 ≤ z ≤ 3.

[0286] Zirconium alloys are alloys containing zirconium, magnesium alloys are alloys containing magnesium, titanium alloys are alloys containing titanium, and vanadium alloys are alloys containing vanadium.

[0287] Among the aforementioned elements, Ti and Co can improve the lifespan and kinetics of hydrogen storage metals, Mg can enhance the hydrogen absorption capacity of hydrogen storage metals, Mn and Al can construct the framework of hydrogen storage metals and reduce costs, Y can reduce the hydrogen absorption plateau pressure of hydrogen storage metals, Fe, Ca and Bi can increase the hydrogen desorption plateau pressure of hydrogen storage metals, and Fe can increase the hydrogen absorption plateau pressure of hydrogen storage metals, while Cu can increase the hydrogen absorption rate of hydrogen storage metals.

[0288] In the above technical solution, by including at least one of zirconium alloys, magnesium alloys, titanium alloys, vanadium alloys, or LaxNiyMz as the hydrogen storage metal, the hydrogen storage metal can have better hydrogen absorption capacity and hydrogen absorption effect.

[0289] In some embodiments, M includes at least one of Al, Mn, Mg, Fe, Y, or Bi, and 0.3 ≤ x ≤ 1, 1 ≤ y ≤ 5, 0 ≤ z ≤ 1; or titanium alloys include at least one of TiNi, Ti2Ni, TiFe, or TiMn2; or magnesium alloys include at least one of Mg2Ni, Mg2Cu, Mg2Co, Mg2Al, Mg2Cr, or Mg2Te; or zirconium alloys include at least one of ZrV2, ZrCr2, or ZrMn2; or vanadium alloys include V3TiNi. 0.56 M1m, m = 0.046-0.24, M1 includes at least one of Al, Si, Fe, Cu or Zr.

[0290] In the above technical solution, by including at least one of Al, Mn, Mg, Fe, Y or Bi, the above hydrogen storage metal has the characteristics of fast hydrogen absorption, large hydrogen absorption capacity, wide hydrogen absorption boundary and small volume expansion, and has excellent hydrogen absorption capacity. This allows the hydrogen storage metal to have good hydrogen absorption capacity and effect, and can absorb the hydrogen gas discharged from the battery cell 30 into the housing 10, reduce the internal pressure of the housing 10, and extend the life of the battery device 100.

[0291] In some embodiments of this application, the titanium alloy includes at least one of TiNi, Ti2Ni, TiFe, or TiMn2. The above-mentioned titanium alloy has excellent hydrogen absorption capacity and can absorb hydrogen gas discharged from the battery cell 30 into the housing 10, reduce the internal pressure of the housing 10, and extend the life of the battery device 100.

[0292] In some embodiments of this application, the magnesium alloy includes at least one of Mg2Ni, Mg2Cu, Mg2Co, Mg2Al, Mg2Cr or Mg2Te. The above-mentioned magnesium alloy has excellent hydrogen absorption capacity and can absorb hydrogen gas discharged from the battery cell 30 into the housing 10, reduce the internal pressure of the housing 10, and extend the life of the battery device 100.

[0293] In some embodiments of this application, the zirconium alloy includes at least one of ZrV2, ZrCr2, or ZrMn2. The zirconium alloy has excellent hydrogen absorption capacity and can absorb hydrogen gas discharged from the battery cell 30 into the housing 10, reduce the internal pressure of the housing 10, and extend the life of the battery device 100.

[0294] In some embodiments of this application, the vanadium alloy includes V3TiNi. 0.56 M1 m M = 0.046-0.24, and M1 includes at least one of Al, Si, Fe, Cu, or Zr. As an example, m can be 0.046-0.23, 0.05-0.2, 0.1-0.15, etc. The vanadium alloy with the above chemical formula has excellent hydrogen absorption capacity and can absorb hydrogen gas discharged from the battery cell 30 into the housing 10, reduce the internal pressure of the housing 10, and extend the life of the battery device 100.

[0295] In some embodiments, hydrogen storage metals include LaNi 3.5 M2 x1 M3 y1 M4 z1 Where x1 is 0.2-0.6, y1 is 0-1, z1 is 0.3-0.9, x1+y1+z1=1.5, M2 includes at least one of Mn or Fe, M3 includes at least one of Zr, Ti or Y, and M4 includes at least one of Al, Mg, Ca or Bi.

[0296] Lanthanide alloys have stable crystal structures and do not undergo other side reactions when reacting with hydrogen. Furthermore, the differences in atomic radius and electronegativity of different elements in the aforementioned hydrogen storage metals affect the unit cell volume of the hydrogen storage metal and the interaction force between hydrogen and metal atoms. Based on the differences in atomic radius and electronegativity of different elements, and through the combined action with transition metal atoms, the embodiments of this application can increase the hydrogen absorption capacity of the hydrogen storage metal, reduce the initial hydrogen absorption pressure, and improve the hydrogen release kinetics performance.

[0297] As an example, doping with transition metal M2 can reduce the hysteresis of hydrogen storage metal, while M3 and M4 can reduce the hydrogen absorption pressure of hydrogen storage metal, making it easier for the hydrogen storage metal to absorb hydrogen. For example, the doping element Ti has a particularly significant effect on improving the activation performance of hydrogen storage metal, because Ti reacts with hydrogen before other phases during the activation process to generate the TiH2 phase, which causes cracks in the hydrogen storage metal, making it easier for hydrogen to enter the interior of the hydrogen storage metal and effectively reducing the activation energy of the hydrogen storage metal. Through the combined effect of the above elements, the hydrogen storage capacity of the hydrogen storage metal can be increased, the initial hydrogen absorption pressure can be reduced, and the hydrogen release kinetics can be improved, making it easier for the hydrogen storage metal to absorb hydrogen and less likely to release hydrogen, thereby reducing the internal pressure of the housing 10 and extending the life of the battery device 100.

[0298] In the above technical solution, by including LaNi as a hydrogen storage metal... 3.5 M2 x1 M3 y1 M4 z1 This can give hydrogen storage metals better hydrogen absorption capacity and effect.

[0299] In some embodiments, hydrogen storage metals include La 0.5 Ni 4.5 Y 0.5 LaNi 3.5 Mn 0.2 YBi 0.3 LaNi 3.5 Mn 0.6 Y 0.4 Bi 0.5 LaNi 3.5 Mn 0.2 Y 0.4 Bi 0.9 LaTi 3.5 Fe 0.4 Zr 0.5 Bi 0.6 LaTi 3.5 Fe 0.4 Zr 0.5 Mg 0.6 LaNi 4.26 Al 0.08 Mg0.16 Or La 0.43 Y 0.57 Ni 4.5 Al 0.08 Mn 0.3 At least one of them.

[0300] Among the aforementioned hydrogen storage metals, at least one of Y or Fe elements is used, which can reduce the hydrogen absorption plateau pressure of the hydrogen storage metal. The molar ratio of La-site elements to other elements is less than 1:5. The high content of La-site elements results in a large amount of hydrogen absorption and a lower hydrogen absorption plateau pressure of the hydrogen storage metal.

[0301] In the above technical solution, by including the above-mentioned metal types in the hydrogen storage metal, the hydrogen storage metal has excellent hydrogen storage capacity, low hydrogen absorption plateau pressure and high hydrogen release plateau pressure, which can effectively absorb the hydrogen generated during the alkali metal battery cycle, so that the hydrogen storage metal has good hydrogen absorption capacity and hydrogen absorption effect, reduce the internal pressure of the housing 10 and extend the life of the battery device 100.

[0302] As an example, the preparation method of the above-mentioned hydrogen storage metal can be as follows: the metal elements corresponding to each element of the hydrogen storage metal are mixed in the molar ratio shown in the chemical formula, heated and melted under air-isolated conditions, and then cooled to obtain the hydrogen storage metal.

[0303] Secondly, referring to FIG11, this application provides an electrical device 1000, including: the battery device 100 of the first aspect embodiment described above.

[0304] The electrical device 1000 can be a vehicle, and the battery device 100 can be installed at the bottom of the vehicle body 200.

[0305] In the above technical solution, by setting the battery device 100, the battery device 100 has high reliability and long service life, which is conducive to improving the overall performance of the power-consuming device 1000.

[0306] The battery device 100 according to several embodiments of the present application is described below with reference to Figures 1-10.

[0307] Referring to Figures 1-8, in some embodiments of this application, the battery device 100 includes a housing 10, a battery cell assembly 20, an integrated busbar 40, and a gas storage structure 50. Both the battery cell assembly 20 and the gas storage structure 50 are disposed within the housing 10. The battery cell assembly 20 includes multiple battery cells 30, and the pressure relief structure 31 and electrode lead-out terminals 34 of each battery cell 30 are disposed on the upper side of the battery cell 30.

[0308] The housing 10 includes a first housing 11 and a second housing 12. The first housing 11 is disposed above the second housing 12. A receiving space 13 is defined between the first housing 11 and the top of the battery cell assembly 20. The integrated busbar 40 is located within the receiving space 13. The integrated busbar 40 includes a wiring harness board 41, a sampling circuit board 43, and a conductive connector 42. The sampling circuit board 43 and the conductive connector 42 are both disposed on the wiring harness board 41, and the sampling circuit board 43 and the conductive connector 42 are disposed on the lower side of the wiring harness board 41.

[0309] The wiring harness plate 41 and the top of the battery cell assembly 20 define a receiving gap 44. A gas storage structure 50 is disposed on the side of the sampling circuit board 43 facing the battery cell assembly 20, i.e., the gas storage structure 50 is disposed below the sampling circuit board 43 and located within the receiving gap 44. A first insulating layer 51 is provided on the side of the gas storage structure 50 facing the battery cell 30, i.e., a first insulating layer 51 is provided below the gas storage structure 50. The first insulating layer 51 is a permeable layer that allows hydrogen to pass through. The pressure relief structure 31 of the battery cell 30 faces upwards and towards the receiving gap 44. Hydrogen gas discharged from the battery cell 30 through the pressure relief structure 31 enters the receiving gap 44 and is absorbed by the gas storage structure 50, reducing the risk of hydrogen gas from the battery cell 30 diffusing outside the receiving gap 44.

[0310] Referring to FIG9, in some other embodiments of this application, the battery device 100 includes a housing 10, a battery cell assembly 20, an integrated busbar 40, and a gas storage structure 50. The battery cell assembly 20 and the gas storage structure 50 are both disposed within the housing 10. The battery cell assembly 20 includes a plurality of battery cells 30, and the pressure relief structure 31 and the electrode lead-out terminal 34 of each battery cell 30 are disposed on the upper side of the battery cell 30.

[0311] The housing 10 includes a first housing 11 and a second housing 12. The first housing 11 is disposed above the second housing 12, and a receiving space 13 is defined between the first housing 11 and the top of the battery cell assembly 20. The integrated busbar 40 is located within the receiving space 13. The integrated busbar 40 includes a wiring harness board 41, a sampling circuit board 43, and a conductive connector 42. The sampling circuit board 43 and the conductive connector 42 are both disposed on the wiring harness board 41, and the sampling circuit board 43 and the conductive connector 42 are disposed on the lower side of the wiring harness board 41. The sampling circuit board 43 includes a sampling conductive layer 431, a second insulating layer 432, and a third insulating layer 433. The second insulating layer 432 and the third insulating layer 433 are disposed on opposite sides of the sampling conductive layer 431 in the thickness direction. The second insulating layer 432 is located on the side of the sampling conductive layer 431 facing the battery cell 30, that is, the second insulating layer 432 is located on the lower side of the sampling conductive layer 431. The second insulating layer 432 is a gas-permeable layer that can be permeated by hydrogen.

[0312] The wiring harness plate 41 and the top of the battery cell assembly 20 define a receiving gap 44. A gas storage structure 50 is disposed between the sampling conductive layer 431 and the second insulating layer 432, and is located within the receiving gap 44. The pressure relief structure 31 of the battery cell 30 faces upward and towards the receiving gap 44. Hydrogen gas discharged from the battery cell 30 through the pressure relief structure 31 enters the receiving gap 44 and is absorbed by the gas storage structure 50, reducing the risk of hydrogen gas discharged from the battery cell 30 diffusing outside the receiving gap 44.

[0313] Referring to FIG10, in some other embodiments of this application, the battery device 100 includes a housing 10, a battery cell assembly 20, an integrated busbar 40, and a gas storage structure 50. The battery cell assembly 20 and the gas storage structure 50 are both disposed within the housing 10. The battery cell assembly 20 includes a plurality of battery cells 30, and the pressure relief structure 31 and the electrode lead-out terminal 34 of each battery cell 30 are disposed on the upper side of the battery cell 30.

[0314] The housing 10 includes a first housing 11 and a second housing 12. The first housing 11 is disposed above the second housing 12, and a receiving space 13 is defined between the first housing 11 and the top of the battery cell assembly 20. The integrated busbar 40 is located within the receiving space 13. The integrated busbar 40 includes a wiring harness board 41, a sampling circuit board 43, and a conductive connector 42. The sampling circuit board 43 and the conductive connector 42 are both disposed on the wiring harness board 41, and the sampling circuit board 43 and the conductive connector 42 are disposed on the lower side of the wiring harness board 41. The sampling circuit board 43 includes a sampling conductive layer 431, a second insulating layer 432, and a third insulating layer 433. The second insulating layer 432 and the third insulating layer 433 are disposed on opposite sides of the sampling conductive layer 431 in the thickness direction. The second insulating layer 432 is located on the side of the sampling conductive layer 431 facing the battery cell 30, that is, the second insulating layer 432 is located on the lower side of the sampling conductive layer 431. The second insulating layer 432 is a gas-permeable layer that can be permeated by hydrogen.

[0315] The wiring harness plate 41 and the top of the battery cell assembly 20 define a receiving gap 44. The sampling conductive layer 431 constitutes at least a portion of the gas storage structure 50, and the gas storage structure 50 is located within the receiving gap 44. The pressure relief structure 31 of the battery cell 30 faces upward and toward the receiving gap 44. Hydrogen gas discharged from the battery cell 30 through the pressure relief structure 31 enters the receiving gap 44 and is absorbed by the gas storage structure 50, reducing the risk of hydrogen gas discharged from the battery cell 30 diffusing outside the receiving gap 44.

[0316] 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., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0317] Although embodiments of this application 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 this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery device, wherein, include: Box; At least one set of battery cell assembly is housed in the housing, the battery cell assembly includes multiple battery cells, and the battery cells are provided with a pressure relief structure; A gas storage structure is housed within the casing and located outside the battery cell, wherein at least a portion of the gas storage structure is a hydrogen storage metal.

2. The battery device according to claim 1, wherein, At least a portion of the gas storage structure is located on the side of the battery cell where the pressure relief structure is located.

3. The battery device according to claim 2, wherein, At least a portion of the gas storage structure is disposed opposite to the pressure relief structure.

4. The battery device according to claim 2, wherein, The pressure relief structure is located on top of the battery cell, and at least a portion of the gas storage structure is located on the upper side of the battery cell.

5. The battery device according to any one of claims 1-4, wherein, At least some of the battery cells in the battery cell assembly share one of the gas storage structures.

6. The battery device according to claim 5, wherein, All the battery cells in the battery cell assembly share a single gas storage structure, and the number of gas storage structures is the same as the number of battery cell assemblies, with each structure corresponding to the other.

7. The battery device according to any one of claims 1-6, wherein, At least a portion of the gas storage structure is layered.

8. The battery device according to claim 7, wherein, The pressure relief structure is positioned toward the gas storage structure along its thickness direction.

9. The battery device according to any one of claims 1-8, wherein, A first insulating layer is provided between the gas storage structure and the battery cell.

10. The battery device according to claim 9, wherein, The first insulating layer is fixed to the gas storage structure.

11. The battery device according to claim 9 or 10, wherein, The first insulating layer is a gas-permeable layer that allows hydrogen gas to pass through.

12. The battery device according to claim 11, wherein, The first insulating layer is a polyimide layer, a polyurethane layer, a polypropylene layer, a chlorinated polyethylene layer, or a polytetrafluoroethylene layer.

13. The battery device according to any one of claims 1-12, wherein, A receiving space is defined between the housing and the battery cell assembly, and at least a portion of the gas storage structure is located within the receiving space.

14. The battery device according to claim 13, wherein, The system includes an integrated busbar located within the housing and the accommodating space. The electrode leads of each battery cell are located on the side of the battery cell facing the integrated busbar. The integrated busbar includes a wiring harness board, conductive connectors, and a sampling circuit board. The wiring harness board is an insulating component. The conductive connectors and the sampling circuit board are both located on the wiring harness board. The conductive connectors connect to the electrode leads of adjacent battery cells. The sampling circuit board is used to collect information from the battery cells. At least a portion of the gas storage structure is integrated into the integrated busbar.

15. The battery device according to claim 14, wherein, The gas storage structure integrated into the integrated busbar is formed in a sheet-like shape, and the thickness direction of the gas storage structure integrated into the integrated busbar is consistent with the thickness direction of the integrated busbar.

16. The battery device according to claim 14 or 15, wherein, The pressure relief structure is located on the side of the battery cell facing the integrated busbar.

17. The battery device according to any one of claims 14-16, wherein, At least a portion of the gas storage structure is located on the side of the integrated busbar facing the battery cell.

18. The battery device according to claim 17, wherein, A receiving gap is defined between the wiring harness plate and the battery cell assembly, the pressure relief structure faces the receiving gap, and at least a portion of the gas storage structure is located within the receiving gap.

19. The battery device according to any one of claims 14-18, wherein, At least a portion of the gas storage structure is disposed on at least one of the wire harness board, the sampling circuit board, and the conductive connector.

20. The battery device according to claim 19, wherein, At least a portion of the gas storage structure is integrated into the sampling circuit board.

21. The battery device according to claim 20, wherein, At least a portion of the gas storage structure is located on the side of the sampling circuit board facing the battery cell.

22. The battery device according to claim 20, wherein, The sampling circuit board includes a sampling conductive layer, a second insulating layer, and a third insulating layer. The second insulating layer and the third insulating layer are disposed on opposite sides of the sampling conductive layer in the thickness direction. The second insulating layer is located on the side of the sampling conductive layer closer to the battery cell. At least a portion of the gas storage structure is disposed between the sampling conductive layer and the second insulating layer.

23. The battery device according to claim 22, wherein, The second insulating layer is a permeable layer that allows hydrogen gas to pass through.

24. The battery device according to claim 20, wherein, The sampling circuit board includes a sampling conductive layer, a second insulating layer, and a third insulating layer. The second insulating layer and the third insulating layer are disposed on opposite sides of the sampling conductive layer in the thickness direction. The second insulating layer is located on the side of the sampling conductive layer closer to the battery cell. At least a portion of the gas storage structure is composed of the sampling conductive layer.

25. The battery device according to claim 24, wherein, At least one of the second insulating layer and the third insulating layer is a gas-permeable layer that allows hydrogen to pass through.

26. The battery device according to any one of claims 14-25, wherein, The electrode lead-out end and the pressure relief structure are both located on the top of the battery cell, and the integrated busbar is located on the upper side of the battery cell assembly.

27. The battery device according to claim 13, wherein, The device includes a sampling circuit board located inside the housing and within the accommodating space. The sampling circuit board is used to collect information from the individual battery cells, and at least a portion of the gas storage structure is integrated into the sampling circuit board.

28. The battery device according to claim 13, wherein, The device includes a conductive connector located within the housing and the accommodating space. The conductive connector connects to the electrode leads of adjacent battery cells, and at least a portion of the gas storage structure is integrated into the conductive connector.

29. The battery device according to any one of claims 1-28, wherein, The pressure relief structure includes a waterproof and breathable membrane that can be permeated with hydrogen gas.

30. The battery device according to any one of claims 1-29, wherein, The battery cell is configured as an alkali metal battery.

31. The battery device according to claim 30, wherein, The battery cell includes a housing and an electrode assembly disposed within the housing. The electrode assembly includes a negative electrode sheet, the negative electrode sheet includes a negative current collector and an active material layer disposed on at least one side of the negative current collector, the active material layer including an elemental active metal.

32. The battery device according to claim 31, wherein, The active metal element includes at least one of lithium, sodium, potassium, zinc, or aluminum.

33. The battery device according to any one of claims 30-32, wherein, The electrolyte of the battery cell includes a solvent, which is configured as at least one of an ether solvent or an ester solvent.

34. The battery device according to claim 33, wherein, The solvent includes ether solvents, which include at least one of 1,2-dimethoxypropane, dimethoxymethane, ethylene glycol dimethyl ether, tetrahydrofuran, 2-methyltetrahydrofuran, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, pentaethylene glycol dimethyl ether, polyethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol diethyl ether, triethylene glycol diethyl ether, tetraethylene glycol diethyl ether, pentaethylene glycol diethyl ether, ethylene glycol dibutyl ether, diethylene glycol dibutyl ether, or 1,3-dioxopentane.

35. The battery device according to any one of claims 1-29, wherein, The hydrogen storage metal includes zirconium alloys, magnesium alloys, titanium alloys, vanadium alloys, or La. x Ni y M z At least one of them, Wherein, M includes at least one of Zr, Mn, Mg, Zn, Al, Ti, Fe, Cu, Co, Y, Ca or Bi, 0 < x ≤ 2, 0 ≤ y ≤ 7, 0 ≤ z ≤ 3.

36. The battery device according to claim 35, wherein, M includes at least one of Al, Mn, Mg, Fe, Y or Bi, and 0.3≤x≤1, 1≤y≤5, 0≤z≤1; Or the titanium alloy may include at least one of TiNi, Ti2Ni, TiFe or TiMn2; Or the magnesium alloy may include at least one of Mg2Ni, Mg2Cu, Mg2Co, Mg2Al, Mg2Cr or Mg2Te; Or the zirconium alloy may include at least one of ZrV2, ZrCr2, or ZrMn2; Or the vanadium alloy may include V3TiNi 0.56 M1m, m = 0.046-0.24, M1 includes at least one of Al, Si, Fe, Cu or Zr.

37. The battery device according to claim 35, wherein, The hydrogen storage metal includes LaNi. 3.5 M2 x1 M3 y1 M4 z1 Where x1 is 0.2-0.6, y1 is 0-1, z1 is 0.3-0.9, x1+y1+z1=1.5, M2 includes at least one of Mn or Fe, M3 includes at least one of Zr, Ti or Y, and M4 includes at least one of Al, Mg, Ca or Bi.

38. The battery device according to claim 35, wherein, The hydrogen storage metal includes La. 0.5 Ni 4.5 Y 0.5 LaNi 3.5 Mn 0.2 YBi 0.3 LaNi 3.5 Mn 0.6 Y 0.4 Bi 0.5 LaNi 3.5 Mn 0.2 Y 0.4 Bi 0.9 LaTi 3.5 Fe 0.4 Zr 0.5 Bi 0.6 LaTi 3.5 Fe 0.4 Zr 0.5 Mg 0.6 LaNi 4.26 Al 0.08 Mg 0.16 Or La 0.43 Y 0.57 Ni 4.5 Al 0.08 Mn 0.3 At least one of them.

39. An electrical appliance, wherein, include: The battery device according to any one of claims 1-38.

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