Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment. The battery device comprises: a case (201) in which an accommodating space (230) is formed; the battery module (100) is arranged in the accommodating space (230); wherein the battery module (100) comprises: battery cells (140) arranged to be of a square structure, at least two battery cells (140) are stacked in a first direction, the first direction is consistent with the thickness direction of the battery cells (140) and the height direction of the box shell (201), the thickness of the battery cells (140) is smaller than the length and width of the battery cells (140), and each battery cell (140) comprises a pole structure (144); and the structural member is fixed on at least one surface of the battery module (100), and the structural member avoids the pole structure (144). According to the technical scheme, the problems that the space utilization rate is low and the energy density of the battery device is not improved due to the fact that the single batteries in the battery device applied to the commercial vehicle are assembled in a vertical installation mode are solved.

Description

Technical Field

[0001] This application relates to the field of battery design and manufacturing technology, specifically to a battery device and electrical equipment. Background Technology

[0002] A battery device typically consists of multiple battery cells, which are vertically assembled in a housing and electrically connected in series, parallel, or mixed configurations.

[0003] In commercial vehicles, battery cells are typically mounted vertically (also known as "upright"), resulting in a relatively high overall height for the battery pack. If the individual cells are mounted upright, the space utilization of the battery pack's casing becomes inefficient. Summary of the Invention

[0004] The purpose of this application is to provide a battery device and electrical equipment, including but not limited to solving the problem that the battery cells in a battery device used in commercial vehicles are assembled in a vertical manner, resulting in low utilization of the casing space and hindering the improvement of the energy density of the battery device.

[0005] The technical solution adopted in the embodiments of this application is:

[0006] According to a first aspect of this application, a battery device is provided, comprising:

[0007] The outer shell forms a storage space;

[0008] The battery module is housed within the storage space; among which...

[0009] The battery module includes:

[0010] The battery cell is configured as a square structure, with at least two battery cells stacked in a first direction. The first direction is consistent with the thickness direction of the battery cell and the height direction of the casing. The thickness of the battery cell is less than the length and width of the battery cell. The battery cell includes an electrode structure.

[0011] The structural component is fixed to at least one surface of the battery module, and the structural component avoids the terminal post structure.

[0012] In the battery device provided in this application, the battery cells are installed in a horizontal mounting manner. Compared with the vertical assembly of battery cells in related technologies, the horizontal mounting method can make more reasonable use of the limited assembly space of the casing, improve space utilization, and help improve the energy density of the battery device.

[0013] In some embodiments of this application, the structural component includes a first plate and a second plate, which are respectively disposed on the uppermost and lowermost surfaces of the battery module. The first plate and the second plate clamp and fix the battery cells, wherein the surfaces of both the first plate and the second plate are perpendicular to a first direction. During the use of the battery device, compared to vertical assembly of battery cells, the number of battery cells along the first direction is reduced, resulting in a decrease in expansion force along the first direction. Therefore, the battery device is less prone to damage, thus improving its service life.

[0014] In some embodiments of this application, the structural component further includes at least one intermediate layer plate, which is disposed between the first and second layers plate, and battery cells are disposed on both the upper and lower sides of the intermediate layer plate. The intermediate layer plate can reduce the stress caused by direct contact between battery cells, which is beneficial for protecting the battery cells.

[0015] In some embodiments of this application, the structural component further includes a partition, with its two ends connected to a first layer plate and a second layer plate, respectively. The surface of the partition is parallel to a first direction. The first layer plate, the second layer plate, and the partition form a first mounting space and a second mounting space. Battery cells are stacked in both the first and second mounting spaces, and the battery cells abut against the partition. Compared to the vertical assembly of battery cells in related technologies, the horizontal installation of battery cells can make more rational use of the limited assembly space of the casing, improve space utilization, and help improve the energy density of the battery device.

[0016] In some embodiments of this application, the battery cells located in the first mounting space and the battery cells located in the second mounting space are symmetrically arranged with respect to the separator, and the terminal post structure is disposed on the surface of the battery cell away from the separator. This allows for more rational use of the limited assembly space of the casing, improves space utilization, and is beneficial to increasing the energy density of the battery device.

[0017] In some embodiments of this application, multiple battery cells are sequentially laid out along a second direction to form a single layer within a first mounting space and a second mounting space, and multiple layers are stacked along the first direction, wherein the second direction is perpendicular to the first direction and parallel to the surface of the separator. This allows for more efficient use of the limited assembly space of the casing, improving space utilization and contributing to increased energy density of the battery device.

[0018] In some embodiments of this application, the structural component further includes a tie rod, with its two ends connected to the edges of the first and second layers, respectively. The tie rod pulls the first and second layers together to further clamp the battery cell, ensuring that the battery cell is stably positioned within the first and second mounting spaces.

[0019] In some embodiments of this application, the shoulders of two adjacent battery cells along the second direction are simultaneously pressed against by a pull bar. This not only minimizes the number of pull bars used but also makes the restraint of the pull bars on the battery cells more secure.

[0020] In some embodiments of this application, structural adhesive is provided between the pull strip and the battery cell. The structural adhesive can prevent short circuits between the battery cell and the pull strip, protecting the safety of the battery cell in use. Furthermore, it prevents direct rigid contact between the pull strip and the battery cell, reducing the squeezing damage to the battery cell caused by the pull strip and protecting the integrity of the battery cell.

[0021] In some embodiments of this application, one end of the pull bar is connected to the edge of the first layer plate and the other end of the pull bar is connected to the edge of the second layer plate by bolts or welding, which reduces the difficulty of assembling the pull bar and makes the assembly of the pull bar more efficient.

[0022] In some embodiments of this application, the intermediate layer includes a liquid cooling plate; at least one liquid cooling plate is provided between any two adjacent battery cells; or, multiple layers of battery cells are provided on both the upper and lower sides of the liquid cooling plate. This ensures that each battery cell can be maintained within a stable operating temperature range, that is, that the overall operating temperature of the battery module is always kept within a suitable temperature range, so that the battery module can always charge and discharge normally.

[0023] In some embodiments of this application, the first layer plate is provided with a first liquid cooling channel for the flow of coolant; and / or, the second layer plate is provided with a second liquid cooling channel for the flow of coolant. This ensures that the overall operating temperature of the battery module remains within a suitable range, further enabling the battery module to charge and discharge normally at all times.

[0024] In some embodiments of this application, the partition is provided with a third liquid cooling channel for the flow of coolant. This ensures that the overall operating temperature of the battery module remains within a suitable range, further enabling the battery module to charge and discharge normally at all times.

[0025] In some embodiments of this application, structural adhesive is provided between the surface of the battery cell facing the separator and the separator. The structural adhesive not only prevents short circuits between the battery cell and the separator, protecting the safety of the battery cell, but also provides a flexible buffering effect, preventing the separator from directly and rigidly contacting the end wall of the battery cell.

[0026] In some embodiments of this application, structural adhesive is provided between the surface of the battery cell facing the first layer plate and the first layer plate, and between the surface of the battery cell facing the second layer plate and the second layer plate. The structural adhesive not only prevents short circuits between the battery cell and the first layer plate, and between the battery cell and the second layer plate, protecting the safety of the battery cell, but also provides a flexible buffering effect, ensuring that the first and second layer plates do not directly and rigidly contact the battery cell.

[0027] In some embodiments of this application, the first layer plate and the partition are connected by bolts or welding; and / or, the second layer plate and the partition are connected by bolts or welding, which reduces the assembly difficulty, makes assembly easier and results in high assembly efficiency.

[0028] In some embodiments of this application, the casing includes a housing and a cover. The cover fits onto the housing to form an accommodating space. A load-bearing beam is provided at the bottom of the housing. Any opposing edge areas formed by structural components in the battery module are correspondingly positioned with the load-bearing beam. This ensures that the bottom of the housing will not deform under the pressure of the battery module's weight, maintaining the integrity of the housing.

[0029] In some embodiments of this application, the load-bearing beam extends along the length of the box shell.

[0030] In some embodiments of this application, a reinforcing beam is provided at the bottom of the casing, with each end of the reinforcing beam connected to two opposing load-bearing beams, and the reinforcing beam resting against the bottom of the casing. In this way, the reinforcing beam and the load-bearing beams together support the battery module, greatly improving the structural strength of the bottom of the casing.

[0031] In some embodiments of this application, structural adhesive is provided between the surface of the battery module formed by structural components facing the bottom of the housing and the bottom of the housing, thereby improving the overall integrity of the battery device.

[0032] In some embodiments of this application, multiple battery modules are configured, and the multiple battery modules are arranged sequentially in a direction perpendicular to the first direction.

[0033] According to a second aspect of this application, an electrical device is provided, including a battery device as described above. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1This is an exploded view of the battery device provided in the embodiments of this application;

[0036] Figure 2 This is an exploded view of the battery module and the bottom of the housing in the battery device provided in the embodiments of this application;

[0037] Figure 3 yes Figure 2 Enlarged view of point B in the middle;

[0038] Figure 4 This is a schematic diagram of the structure of the battery cell used in the battery module of the battery device provided in this application embodiment;

[0039] Figure 5 This is a schematic diagram of the assembly structure of the battery module in the battery device provided in the embodiments of this application;

[0040] Figure 6 yes Figure 5 Enlarged view of point A in the middle;

[0041] Figure 7 This is an exploded view of the battery module in the battery device provided in the embodiments of this application;

[0042] Figure 8 This is a schematic diagram of the structure of a battery module in which only one layer of battery cells is laid in the first and second installation spaces provided in the embodiments of this application;

[0043] Figure 9 This is a schematic diagram of the structure of the electrical equipment provided in the embodiments of this application.

[0044] The figures in the diagram are labeled as follows:

[0045] 100. Battery module;

[0046] 110. First layer plate; 111. First liquid cooling channel; 120. Second layer plate; 121. Second liquid cooling channel; 130. Separator; 131. First mounting space; 132. Second mounting space; 133. Third liquid cooling channel; 140. Battery cell; 141. Circumferential sidewall; 142. End wall; 143. Pressure relief structure; 144. Terminal structure; 150. Tie bar; 160. Intermediate layer plate; 161. First liquid cooling plate; 162. Second liquid cooling plate;

[0047] 200. Battery device;

[0048] 201. Shell; 210. Body; 211. Bottom; 220. Cover; 230. Storage space; 240. Load-bearing beam; 250. Reinforcing beam;

[0049] 300. Electrical equipment; 301. Chassis; 302. Drive motor; 303. Wheels;

[0050] X, the first direction; Y, the second direction. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the scope of this application.

[0052] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are for ease of description only, not to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0053] To illustrate the technical solutions provided in this application, the following detailed description is provided in conjunction with specific drawings and embodiments.

[0054] Currently, new energy, or renewable energy, plays an increasingly important role in social development, and its application and popularization are developing rapidly. New energy includes, but is not limited to, solar, wind, geothermal, and tidal energy. These renewable energy sources are converted into easily stored and utilized electrical energy, which is then applied to various industries through power output. Storing the electrical energy converted from renewable energy requires new energy batteries, including, but not limited to, lithium batteries, nickel-metal hydride batteries, and lead-acid batteries. Among these, lithium batteries have significant advantages over other types of batteries; therefore, enterprises, universities, and research institutes are vigorously developing lithium batteries. Hereinafter, new energy batteries will be collectively referred to as battery devices.

[0055] Generally, a battery device includes at least one battery cell, but most battery devices are equipped with multiple battery cells to meet the demand for high power. The following descriptions of battery devices using multiple battery cells will focus on examples. Multiple battery cells are electrically connected in parallel, series, or a combination of series and parallel connections to output the required output voltage and current.

[0056] In commercial vehicles, battery cells installed vertically (also known as "upright") are relatively tall, resulting in a high overall height for the battery pack. If the battery cells are placed upright, space utilization is inefficient.

[0057] The phrase "vertical installation of individual battery cells" refers to the following: Taking a square battery cell as an example, a square battery cell includes four side walls and two end walls. The four side walls consist of two relatively larger side walls (i.e., larger side walls) and two relatively smaller side walls (i.e., smaller side walls). When assembled into a battery device, the two end walls of each battery cell face the bottom and top of the housing, respectively. The bottom and top of the housing are arranged along the height direction of the housing, while the length and width directions of the housing are perpendicular to the height direction. Adjacent battery cells are assembled by attaching their two larger side walls together. Multiple battery cells are arranged along the length or width direction of the housing, and the expansion caused by the larger side walls of the multiple battery cells accumulates along that length or width direction.

[0058] Based on the above considerations, this application provides a battery device in which the battery cells are installed horizontally. Compared to vertical assembly of battery cells, this method makes more efficient use of the limited assembly space of the casing, improves space utilization, and is beneficial to increasing the energy density of the battery device. Furthermore, this application provides an electrical device that uses the battery device provided in this application to supply power to the electrical load of the device, enabling the device to operate normally.

[0059] To illustrate the technical solutions provided in this application, the following detailed description is provided in conjunction with specific drawings and embodiments.

[0060] According to a first aspect of this application, a battery device 200 is provided, such as... Figure 1 , Figure 2 , Figures 5 to 7 As shown, the battery device 200 includes a housing 201 and a battery module 100. The housing 201 forms a receiving space 230, and the battery module 100 is disposed within the receiving space 230. The battery module 100 includes battery cells 140 and structural components. The battery cells 140 are configured with a square structure, and at least two battery cells 140 are stacked in a first direction X. The first direction X is aligned with the thickness direction of the battery cells 140 and the height direction of the housing 201, and the thickness of the battery cells 140 is less than its length and width. The battery cells 140 include terminal post structures 144. The structural components are fixed to at least one surface of the battery module 100, and the structural components avoid the terminal post structures 144.

[0061] The phrase "battery cells are installed horizontally" is relative to "battery cells are installed vertically." When battery cells are installed horizontally, the larger sidewall of the battery cell is in the first direction X, which is the height direction of the battery module. The battery module has a flat structure, meaning that the height of the battery module is less than the length of the battery module, and the width of the battery module is slightly greater than the sum of the heights of the two battery cells. When the battery module is placed in a housing to form a battery device, the larger sidewall of the battery cell is in the arrangement direction of the bottom and top of the housing. Furthermore, in the battery module, one end wall of the battery cell is fitted against the separator.

[0062] In the battery device 200 provided in this application, the battery cells 140 are installed in a horizontal mounting manner. That is, at least two square-structured battery cells 140 are stacked in a first direction X, which is consistent with the thickness direction of the battery cells 140 and the height direction of the casing 201. The thickness of the battery cells 140 is less than its length and width. Compared to the vertical assembly of battery cells in related technologies, the horizontal mounting method for the battery cells 140 makes more efficient use of the limited assembly space of the casing 201, improving space utilization and thus increasing the energy density of the battery device 200.

[0063] like Figure 4 As shown, the battery cell 140 has a circumferential sidewall 141 and two end walls 142 connected to both ends of the circumferential sidewall 141, forming a housing. The battery cell 140 has a pressure relief structure 143 and an electrode structure 144. The pressure relief structure 143 is used to release the internal air pressure of the battery cell 140, and the electrode structure 144 serves as an external electrode terminal for the battery cell 140. The pressure relief structure 143 can be installed on one of the end walls 142, and the electrode structure 144 can be installed on one of the end walls 142. Furthermore, the pressure relief structure 143 and the electrode structure 144 can be installed on the same end wall 142, or they can be installed on two separate end walls 142.

[0064] The pressure relief structure 143 refers to an element or component that is activated to release internal pressure when the internal pressure or temperature of the battery cell 140 reaches a predetermined threshold. "Activation" means that the pressure relief structure 143 performs an action, allowing the internal pressure and temperature of the battery cell 140 to be released through the exhaust channel. The action of the pressure relief structure 143 may include, but is not limited to, at least a portion of the pressure relief structure 143 rupturing, tearing, or melting. After activation, the high-temperature flue gas inside the battery cell 140 will be discharged outward through the exhaust channel of the pressure relief structure 143. The predetermined threshold can be adjusted according to different design requirements. The predetermined threshold may depend on one or more of the materials of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 140. The pressure relief structure 143 may employ elements or components that are sensitive to pressure or temperature; that is, when the internal pressure or temperature of the battery cell 140 reaches the predetermined threshold, the pressure relief structure 143 is activated, thereby forming a channel for releasing internal pressure.

[0065] like Figure 1 As shown, in some embodiments of this application, the housing 201 includes a housing body 210 and a cover 220. The cover 220 closes onto the housing body 210 to form a receiving space 230, and the battery module 100 is installed within the receiving space 230. In this battery device 200, the battery module 100 is an assembled whole module, meaning that the battery module 100 has been assembled into an independent whole module before being assembled into the receiving space 230 of the housing 201. Then, the battery module 100 is placed as a whole into the housing body 210, and then the cover 220 is closed. In other words, the housing body 210, the battery module 100, and the cover 220 are assembled in a modular manner, which greatly improves the assembly production efficiency of the assembled battery device 200.

[0066] In some embodiments of this application, such as Figures 5 to 7 As shown, the structural components include a first layer plate 110 and a second layer plate 120. The first layer plate 110 and the second layer plate 120 are respectively disposed on the uppermost and lowermost surfaces of the battery module 100, that is, the first layer plate 110 and the second layer plate 120 are arranged opposite to each other, and the first layer plate 110 and the second layer plate 120 clamp and fix the battery cell 140. The surfaces of both the first layer plate 110 and the second layer plate 120 are perpendicular to the first direction X. In the battery module 100, the first layer plate 110 and the second layer plate 120 are assembled towards the bottom and top of the housing 210 of the battery device 200, respectively. During the use of the battery device 200, compared to a vertical assembly of battery cells, the number of battery cells 140 along the first direction X is reduced, resulting in a decrease in the expansion force along the first direction X. Therefore, the battery device 200 is less prone to damage, thus improving its service life.

[0067] In some embodiments of this application, such as Figures 6 to 8 As shown, the structural component also includes a partition 130. The two ends of the partition 130 are respectively connected to the first layer plate 110 and the second layer plate 120. The surface of the partition 130 is parallel to the first direction X, and the plane on which the surface of the partition 130 is located is perpendicular to the plane on which the surface of the first layer plate 110 and the plane on which the surface of the second layer plate 120 are located. The first layer plate 110, the second layer plate 120, and the separator 130 form a first installation space 131 and a second installation space 132. Battery cells 140 are stacked in the first installation space 131, and battery cells 140 are also stacked in the second installation space 132. The arrangement direction of the two end walls 142 of each battery cell 140 (i.e., the length direction of the battery cell 140) is perpendicular to the surface of the separator 130. One end wall 142 of the battery cell 140 is attached to the separator 130 (i.e., the battery cell 140 abuts against the separator 130). A terminal structure 144 is provided on the other end wall 142 of the battery cell 140. The terminal structure 144 is exposed in the battery module 100 to facilitate subsequent wiring and assembly. The first layer plate 110 and the second layer plate 120 clamp and fix the stacked battery cells 140. The first layer plate 110, the second layer plate 120, and the separator 130 of this application are assembled into an "I"-shaped load-bearing structure, forming a first mounting space 131 and a second mounting space 132. Multiple battery cells 140 are installed horizontally within the first mounting space 131 and the second mounting space 132. Compared to the vertical assembly of battery cells in related technologies, the horizontal installation of battery cells 140 makes more efficient use of the limited assembly space of the housing 201, improving space utilization and thus increasing the energy density of the battery device 200. Furthermore, the battery cells 140 are clamped and fixed by the first layer plate 110 and the second layer plate 120, meaning that the larger sidewall of the circumferential sidewall 141 of the battery cell 140 is positioned in the first direction X. Compared to vertical assembly of individual battery cells, if the height of the battery module 100 remains unchanged (i.e., the height of the battery module 100 is approximately the height of the vertically assembled individual battery cells), the number of individual battery cells 140 along the first direction X is reduced, which reduces the expansion force along the first direction X. Therefore, the battery module 100 is less prone to damage and its service life is improved.

[0068] In some embodiments of this application, such as Figure 5 and Figure 7As shown, the battery cells 140 located in the first mounting space 131 and the battery cells 140 located in the second mounting space 132 are symmetrically arranged with respect to the separator 130. This allows for the effective utilization of both the first and second mounting spaces 131 and 132, enabling a compact arrangement of the battery cells 140 within a limited space, thus assembling a greater number of battery cells 140. For a space of a fixed size and shape, the number of items placed in that space will vary depending on the position and state of the objects, resulting in different space utilization rates. Therefore, without increasing the volume of the battery module 100, the energy density of the battery module 100 can be significantly improved.

[0069] like Figures 5 to 7 As shown, in some embodiments of this application, within the first mounting space 131, multiple battery cells 140 are sequentially arranged along the second direction Y to form a single layer, and multiple layers are stacked along the first direction X. Within the second mounting space 132, multiple battery cells 140 are sequentially arranged along the second direction Y to form a single layer, and multiple layers are stacked along the first direction X. The second direction Y is perpendicular to the first direction X and parallel to the surface of the separator 130. The second direction Y is parallel to the surface of the separator 130, parallel to the surface of the first layer plate 110, and parallel to the surface of the second layer plate 120. Thus, the formed battery module 100 is generally flat. During charging and discharging, the main expansion forces of the battery module 100 are: the expansion force at the larger sidewall of the single battery cell 140 in the first mounting space 131, and the expansion force at the larger sidewall of the single battery cell 140 in the second mounting space 132. Furthermore, since the two larger sidewalls of each battery cell 140 are respectively abutted by the first layer plate 110 and the second layer plate 120, the expansion force of the battery cell 140 on the larger sidewalls can be offset, thereby keeping the battery cell 140 stable and undeformed. Compared with vertical assembly of battery cells, the number of battery cells 140 stacked along the first direction X is significantly less than the number of battery cells in a row in a vertical assembly structure, which reduces the cumulative expansion force of the battery module 100 along the first direction X. Therefore, the battery module 100 is less prone to damage, thereby improving its service life.

[0070] In some embodiments of this application, such as Figure 8 As shown, only one layer of battery cell 140 can be formed in the first installation space 131, and only one layer of battery cell 140 can be formed in the second installation space 132.

[0071] In some embodiments of this application, in order to more securely clamp and fix the battery cells 140 stacked in the first mounting space 131 and the battery cells 140 stacked in the second mounting space 132, therefore, as Figures 5 to 7 As shown, the structural component also includes a pull rod 150, with its two ends connected to the edges of the first layer plate 110 and the second layer plate 120, respectively. When the pull rod 150 is installed, it creates a pull between the first layer plate 110 and the second layer plate 120, thereby pulling the first layer plate 110 and the second layer plate 120 together to further clamp the battery cell 140, so that the battery cell 140 can be stably positioned within the first mounting space 131 and the second mounting space 132.

[0072] In some other embodiments of this application, along the second direction Y, a pull bar 150 is provided for each two adjacent battery cells 140, that is, the shoulders of two adjacent battery cells 140 are simultaneously pressed by a pull bar 150. Furthermore, multiple pull bars 150 are arranged at intervals along the second direction Y. This not only minimizes the number of pull bars 150 used, helping to reduce the overall weight of the battery module 100 and achieve a lightweight design effect, but also makes the restraint of the battery cells 140 by the pull bars 150 more stable. The pull bars 150 confine the battery cells 140 within the first mounting space 131 and the second mounting space 132, preventing the battery cells 140 from detaching from the first mounting space 131 and the second mounting space 132 under external force in a direction perpendicular to the surface of the separator 130. The battery cells 140 are less likely to detach from the first mounting space 131 and the second mounting space 132, which helps to reinforce and stabilize the assembly of the battery cells 140.

[0073] Optionally, the tie rod 150 is made of steel, which makes the tie rod 150 lighter and gives it strong structural strength and toughness.

[0074] In some embodiments of this application, structural adhesive is provided between the pull strip 150 and the corresponding battery cell 140. After the structural adhesive between the pull strip 150 and the battery cell 140 cures, an insulating layer is formed between the pull strip 150 and the battery cell 140, preventing short circuits between the battery cell 140 and the pull strip 150 and protecting the safety of the battery cell 140. Furthermore, the structural adhesive between the pull strip 150 and the battery cell 140 also has a flexible cushioning effect, preventing direct rigid contact between the pull strip 150 and the battery cell 140, reducing the squeezing damage caused by the pull strip 150 to the battery cell 140, and protecting the integrity of the battery cell 140.

[0075] In some embodiments of this application, one end of the pull strip 150 is bolted to the edge of the first layer plate 110, and the other end of the pull strip 150 is also bolted to the edge of the second layer plate 120. This reduces the difficulty of assembling the pull strip 150, making assembly easier and more efficient, while also meeting the structural strength requirements for the assembly of the pull strip 150, the first layer plate 110, and the second layer plate 120, thus protecting the safety of the battery module 100.

[0076] In some other embodiments of this application, one end of the pull bar 150 is welded and fixed to the edge of the first layer plate 110, and the other end of the pull bar 150 is also welded and fixed to the edge of the second layer plate 120. In this way, the pull bar 150 and the first layer plate 110 and the pull bar 150 and the second layer plate 120 are formed into an integral structure, which makes the integral structure formed by the pull bar 150, the first layer plate 110 and the second layer plate 120 have strong structural strength. It can protect the battery cells 140 located in the first mounting space 131 and the second mounting space 132 from damage as much as possible when the battery module 100 is impacted, thus protecting the safety of the battery module 100.

[0077] like Figure 3 , Figures 5 to 7 As shown, in some embodiments of this application, the structural component further includes at least one intermediate layer plate 160, which is disposed between the first layer plate 110 and the second layer plate 120. Battery cells 140 are disposed on both the upper and lower sides of the intermediate layer plate 160. By providing the intermediate layer plate 160, the battery cells 140 are indirectly stacked together through the intermediate layer plate 160, which reduces the stress caused by direct contact between the battery cells 140 and the battery cells 140, thus protecting the battery cells 140, improving the overall strength of the battery module 100, and enhancing the overall safety performance of the battery module 100.

[0078] In some embodiments of this application, the intermediate layer 160 may be a solid plate. The intermediate layer 160 serves to separate the stacked battery cells 140, thereby reducing the stress caused by direct contact between the battery cells 140 and protecting the battery cells 140.

[0079] During the charging and discharging process of the battery device 200, i.e., each battery cell 140 is charged and discharged simultaneously, each battery cell 140 will generate heat. In order to prevent the heat generated by the battery cells 140 located in the first mounting space 131 from accumulating and causing the overall temperature of the battery module 100 to rise, therefore, as Figures 5 to 7As shown, in some embodiments of this application, within the first mounting space 131, based on the use of the intermediate layer plate 160 to improve the overall strength of the battery module 100 to protect the battery cells 140, the intermediate layer plate 160 is configured as a first liquid cooling plate 161, and a first liquid cooling plate 161 is provided between two adjacent rows of battery cells 140. In the battery module 100 of this embodiment, within the first mounting space 131, no first liquid cooling plate 161 is provided between the first layer plate 110 and the adjacent layer of battery cells 140, or between the second layer plate 120 and the adjacent layer of battery cells 140. In this embodiment, within the first mounting space 131, each first liquid cooling plate 161 simultaneously dissipates heat from two rows of battery cells 140. Thus, during the charging and discharging process of the battery module 100, coolant is introduced into the first liquid cooling plate 161, and the heat generated by the battery cells 140 is transferred to the first liquid cooling plate 161. Then, the flowing coolant carries away the heat, thereby achieving heat dissipation from the battery cells 140. This ensures that each battery cell 140 located in the first installation space 131 can maintain a stable operating temperature range, that is, to keep the overall operating temperature of the battery module 100 always within a suitable temperature range, so that the battery module 100 can always charge and discharge normally.

[0080] In some other embodiments of this application, a layer of battery cells 140 is provided between two adjacent first liquid cooling plates 161. In the battery module 100 of this application, within the first mounting space 131, a first liquid cooling plate 161 is provided on both larger sidewalls of the circumferential sidewall 141 of any battery cell 140. In this embodiment, within the first mounting space 131, two first liquid cooling plates 161 simultaneously dissipate heat from a layer of battery cells 140, resulting in better heat dissipation efficiency. During the charging and discharging process of the battery module 100, coolant is introduced into the first liquid cooling plates 161. The heat generated by the battery cells 140 is transferred to the first liquid cooling plates 161, and then the flowing coolant carries away the heat, thereby achieving heat dissipation for the battery cells 140.

[0081] Alternatively, in some embodiments of this application, provided that the basic requirements for heat dissipation of the battery cell 140 are met, the first liquid cooling plate 161 can be assembled by arranging multiple rows of battery cells 140 on both sides. For example, each first liquid cooling plate 161 may have two rows of battery cells 140 on each side; or, each first liquid cooling plate 161 may have three rows of battery cells 140 on each side, etc. In this way, the basic requirements for heat dissipation of the battery cell 140 can be met, while reducing the number of first liquid cooling plates 161 assembled, which helps to reduce the overall weight of the battery module 100 and achieve a lightweight design effect.

[0082] To prevent heat accumulation from the battery cells 140 located in the second mounting space 132 from causing an overall temperature rise in the battery module 100, therefore, in some embodiments of this application, such as Figures 5 to 7 As shown, within the second mounting space 132, in addition to utilizing the intermediate layer plate 160 to enhance the overall strength of the battery module 100 and protect the individual battery cells 140, the intermediate layer plate 160 is configured as a second liquid cooling plate 162, and a second liquid cooling plate 162 is provided between two adjacent rows of battery cells 140. In this embodiment of the battery module 100, within the second mounting space 132, no second liquid cooling plate 162 is provided between the first layer plate 110 and its adjacent layer of battery cells 140, or between the second layer plate 120 and its adjacent layer of battery cells 140. In this embodiment, within the second mounting space 132, each second liquid cooling plate 162 simultaneously dissipates heat from two rows of battery cells 140. Thus, during the charging and discharging process of the battery module 100, coolant is introduced into the second liquid cooling plate 162, and the heat generated by the battery cells 140 is transferred to the second liquid cooling plate 162. Then, the flowing coolant carries away the heat, thereby achieving heat dissipation from the battery cells 140. This ensures that each battery cell 140 within the second mounting space 132 maintains a stable operating temperature range, thus keeping the overall operating temperature of the battery module 100 within a suitable range, enabling the battery module 100 to charge and discharge normally at all times. Similarly, this ensures that each battery cell 140 within the first mounting space 131 maintains a stable operating temperature range, thus keeping the overall operating temperature of the battery module 100 within a suitable range, enabling the battery module 100 to charge and discharge normally at all times.

[0083] In some other embodiments of this application, a layer of battery cells 140 is provided between two adjacent second liquid cooling plates 162. In the battery module 100 of this application, within the second mounting space 132, a second liquid cooling plate 162 is provided on both larger sidewalls of the circumferential sidewall 141 of any battery cell 140. In this embodiment, within the second mounting space 132, two second liquid cooling plates 162 simultaneously dissipate heat from a layer of battery cells 140, resulting in better heat dissipation efficiency. During the charging and discharging process of the battery module 100, coolant is introduced into the second liquid cooling plates 162. The heat generated by the battery cells 140 is transferred to the second liquid cooling plates 162, and then the flowing coolant carries away the heat, thereby achieving heat dissipation for the battery cells 140.

[0084] Alternatively, in some embodiments of this application, provided that the basic requirements for heat dissipation of the battery cell 140 are met, the second liquid cooling plate 162 can be assembled by arranging multiple rows of battery cells 140 on both sides. For example, each second liquid cooling plate 162 may have two rows of battery cells 140 on each side; or, each second liquid cooling plate 162 may have three rows of battery cells 140 on each side; etc. In this way, the basic requirements for heat dissipation of the battery cell 140 can be met, while reducing the number of second liquid cooling plates 162 assembled, which helps to reduce the overall weight of the battery module 100 and achieve a lightweight design effect.

[0085] In some embodiments of this application, such as Figure 6 As shown, the first layer plate 110 is provided with a first liquid cooling channel 111. Thus, during the charging and discharging process of the battery module 100, coolant flows into the first liquid cooling channel 111, at which point the first layer plate 110 functions as a liquid cooling plate for heat dissipation and cooling. That is, the first layer plate 110 acts as a liquid cooling plate to dissipate heat and cool the individual battery cells 140. This ensures that the overall operating temperature of the battery module 100 remains within a suitable temperature range, further enabling the battery module 100 to charge and discharge normally at all times.

[0086] like Figure 6 As shown, in some embodiments of this application, the second layer plate 120 is provided with a second liquid cooling channel 121. Thus, during the charging and discharging process of the battery module 100, coolant flows into the second liquid cooling channel 121, at which point the second layer plate 120 functions as a liquid cooling plate for heat dissipation and cooling. That is, the second layer plate 120 acts as a liquid cooling plate to dissipate heat and cool the battery cells 140. This ensures that the overall operating temperature of the battery module 100 remains within a suitable temperature range, further enabling the battery module 100 to charge and discharge normally at all times.

[0087] like Figure 6 As shown, in some embodiments of this application, the separator 130 is provided with a third liquid cooling channel 133. Thus, during the charging and discharging process of the battery module 100, coolant flows into the third liquid cooling channel 133, at which point the separator 130 functions as a liquid cooling plate for heat dissipation and cooling. That is, the separator 130 acts as a liquid cooling plate to dissipate heat and cool the battery cells 140. This ensures that the overall operating temperature of the battery module 100 remains within a suitable temperature range, further enabling the battery module 100 to charge and discharge normally at all times.

[0088] In the embodiments of this application: the first layer plate 110 is provided with a first liquid cooling channel 111 as a liquid cooling plate, the second layer plate 120 is provided with a second liquid cooling channel 121 as a liquid cooling plate, and the partition plate 130 is provided with a third liquid cooling channel 133 as a liquid cooling plate. Furthermore, a first liquid cooling plate 161 is disposed in the first mounting space 131, and a second liquid cooling plate 162 is disposed in the second mounting space 132. Thus, the first layer plate 110, the second layer plate 120, the partition plate 130, the first liquid cooling plate 161, and the second liquid cooling plate 162 work together to dissipate heat and cool the battery cells 140, ensuring that each battery cell 140 can maintain a stable operating temperature range. In other words, the overall operating temperature of the battery module 100 is kept within a suitable temperature range, allowing the battery module 100 to charge and discharge normally at all times.

[0089] Optionally, the first layer plate 110, the second layer plate 120 and the partition plate 130 are all made of metal materials with good thermal conductivity, including but not limited to aluminum, copper and steel.

[0090] In some embodiments of this application, structural adhesive is provided between one end wall 142 of the battery cell 140 facing the separator 130 and the corresponding surface of the separator 130. After the structural adhesive between the end wall 142 of the battery cell 140 and the separator 130 cures, an insulating adhesive layer is formed between the end wall 142 of the battery cell 140 and the separator 130, preventing short circuits between the battery cell 140 and the separator 130 and protecting the safety of the battery cell 140 in use. Furthermore, the structural adhesive between the end wall 142 of the battery cell 140 and the separator 130 also has a flexible buffering effect, preventing the separator 130 from directly and rigidly contacting the end wall 142 of the battery cell 140. Thus, when the pull bar 150 presses the battery cell 140 against the separator 130, the squeezing damage caused by the separator 130 to the end wall 142 of the battery cell 140 can be reduced, protecting the integrity of the battery cell 140.

[0091] In some embodiments of this application, structural adhesive is provided between the first layer plate 110 and the larger sidewall of the circumferential sidewall 141 of the corresponding battery cell 140, and structural adhesive is also provided between the second layer plate 120 and the larger sidewall of the circumferential sidewall 141 of the corresponding battery cell 140. After the structural adhesive between the first layer plate 110 and the larger sidewall of the battery cell 140 and the structural adhesive between the second layer plate 120 and the larger sidewall of the battery cell 140 are cured, an insulating adhesive layer is formed between the first layer plate 110 and the larger sidewall of the battery cell 140, and between the second layer plate 120 and the larger sidewall of the battery cell 140, to prevent short circuits between the battery cell 140 and the first layer plate 110 and between the battery cell 140 and the second layer plate 120, thus protecting the safety of the battery cell 140 in use. Furthermore, the structural adhesives between the larger sidewall of the battery cell 140 and the first layer plate 110, and between the larger sidewall of the battery cell 140 and the second layer plate 120, provide flexible cushioning, ensuring that neither the first layer plate 110 nor the second layer plate 120 directly and rigidly contacts the larger sidewall of the battery cell 140. Thus, when the first layer plate 110 and the second layer plate 120 are pulled by the tension bar 150 to clamp and fix the battery cell 140, the pressure damage caused by the first layer plate 110 and the second layer plate 120 to the larger sidewall of the battery cell 140 is reduced, protecting the integrity of the battery cell 140.

[0092] In some embodiments of this application, the first layer plate 110 and the separator 130 are connected by bolts. This reduces the difficulty of assembling the first layer plate 110 and the separator 130, increases assembly efficiency, and also meets the structural strength requirements for the assembly between the first layer plate 110 and the separator 130, protecting the safety of the battery module 100.

[0093] In some other embodiments of this application, the first layer plate 110 and the partition plate 130 are welded and fixed together, so that the first layer plate 110 and the partition plate 130 are formed into an integral structure, which has better structural strength.

[0094] In some embodiments of this application, the second layer plate 120 and the separator 130 are connected by bolts. This reduces the difficulty of assembling the second layer plate 120 and the separator 130, increases assembly efficiency, and also meets the structural strength requirements for the assembly between the second layer plate 120 and the separator 130, protecting the safety of the battery module 100.

[0095] In some other embodiments of this application, the second layer plate 120 and the partition plate 130 are welded and fixed together, so that the second layer plate 120 and the partition plate 130 are formed into an integral structure, which has better structural strength.

[0096] In the embodiments of this application, the first layer plate 110 and the partition plate 130 are connected by bolts, and the second layer plate 120 and the partition plate 130 are connected by bolts.

[0097] like Figure 2 and Figure 3 As shown, in some embodiments of this application, the bottom 211 of the housing 210 is provided with a load-bearing beam 240. The load-bearing beam 240 can be located on the side of the bottom 211 of the housing 210 away from the battery module 100, or it can be located on the inner side of the bottom 211 of the housing 210. In this application, the example of the load-bearing beam 240 being located on the side of the bottom 211 of the housing 210 away from the battery module 100 is described. Any two opposite edges of the first layer plate 110 or the second layer plate 120 are correspondingly arranged with the load-bearing beam 240. In this way, when the battery module 100 is placed into the housing 210, the load-bearing beam 240 bears most of the weight of the battery module 100, so that the bottom 211 of the housing 210 will not deform under the pressure of the weight of the battery module 100, thus maintaining the integrity of the housing 210. Since the load-bearing beam 240 bears most of the weight of the battery module 100, the bottom 211 of the housing 210 can be made of thin plate, and the circumferential walls of the housing 210 are also made of thin plate. Furthermore, the cover 220 is also made of thin plate. This allows the overall casing of the battery device 200 to achieve a lightweight design while meeting the requirements for protecting the battery module 100, greatly reducing the overall weight of the battery device 200.

[0098] The battery device 200 provided in this application may have only one battery module 100 or multiple battery modules 100.

[0099] In some embodiments of this application, when the battery device 200 has only one battery module 100, such as Figure 1 and Figure 2 As shown, the two side edges of the first layer plate 110 of the battery module 100 correspond to the two opposite sides of the bottom 211 of the housing 210, respectively. Therefore, load-bearing beams 240 are provided on the two opposite sides of the bottom 211 of the housing 210. When the battery module 100 is placed on the bottom 211 of the housing 210, the two load-bearing beams 240 bear most of the weight of the battery module 100, and the bottom 211 of the housing 210 will not deform. Furthermore, the bottom 211 of the housing 210 is made of a thin plate, which helps to achieve a lightweight design effect for the battery device 200.

[0100] In some embodiments of this application, when the battery device 200 has multiple battery modules 100, not only are load-bearing beams 240 provided on both opposite sides of the bottom 211 of the housing 210, but also between the opposite sides of the bottom 211 of the housing 210. When the battery module 100 is placed into the housing 210, the opposite two edges of the first layer plate 110 correspond one-to-one with the two load-bearing beams 240. In this way, each battery module 100 is supported by the corresponding two load-bearing beams 240, preventing the battery module 100 from squeezing the bottom 211 of the housing 210 and causing deformation of the bottom 211, thus maintaining the integrity of the housing 210. Furthermore, the bottom 211 of the housing 210 is made of a thin plate, which helps the battery device 200 achieve a lightweight design effect. Moreover, when the bottom of the battery device 200 is impacted by an external object, that is, when the bottom 211 of the housing 210 is impacted by an external object, the load-bearing beam 240 can first offset the impact force of the external object, reduce the damage of the external object impact force to the battery cell 140, and thus protect the battery cell 140.

[0101] like Figure 2 and Figure 3 As shown, based on the load-bearing beams 240 supporting the battery module 100, the bottom 211 of the housing 210 is provided with multiple spaced reinforcing beams 250. The reinforcing beams 250 can be located on the side of the bottom 211 of the housing 210 away from the battery module 100, or they can be located on the inner side of the bottom 211 of the housing 210. In this application, we will illustrate with an example where the reinforcing beams 250 are located on the side of the bottom 211 of the housing 210 away from the battery module 100. Each reinforcing beam 250 is connected at both ends to two adjacent load-bearing beams 240, and the reinforcing beams 250 are attached to the bottom 211 of the housing 210. In this way, the reinforcing beams 250 and the load-bearing beams 240 together support the battery module 100, greatly improving the structural strength of the bottom 211 of the housing 210. Furthermore, it facilitates the use of thin plates for assembling the bottom 211 of the housing 210. Moreover, when the bottom of the battery device 200 is hit by an external object, that is, when the bottom 211 of the housing 210 is hit by an external object, the load-bearing beam 240 and the reinforcing beam 250 together resist the external object, which can first offset the impact force of the external object and reduce the damage of the impact force of the external object to the battery cell 140, thereby protecting the battery cell 140.

[0102] In some embodiments of this application, structural adhesive is provided between the first layer 110 or the second layer 120 and the bottom 211 of the housing 210. In embodiments of this application, such as... Figure 3As shown, structural adhesive is provided between the first layer plate 110 and the bottom 211 of the housing 210. Furthermore, the battery device 200 is equipped with only one battery module 100, and the bottom 211 of the housing 210 is assembled from thin plates. In this way, the first layer plate 110 and the bottom 211 of the housing 210 are bonded together with structural adhesive, which strengthens the structural strength of the thin-plate bottom 211 of the housing 210 and improves the overall integrity of the battery device 200.

[0103] In some embodiments of the battery device 200 of this application, multiple battery modules 100 are provided, and the multiple battery modules 100 are sequentially arranged within a housing 201 in a direction perpendicular to the first direction X. Specifically, the direction perpendicular to the first direction X includes the second direction Y and a direction perpendicular to both the first direction X and the second direction Y (i.e., the width direction of the housing 201 perpendicular to the second direction Y). When the overall length of the battery module 100 along the second direction Y is relatively short, and the width of the housing 201 perpendicular to the second direction Y is relatively narrow but the length is sufficient, the multiple battery modules 100 can be sequentially arranged within the housing 201 along the second direction Y, thereby forming a linear arrangement of the multiple battery modules 100 along the second direction Y; when the overall length of the battery module 100 along the second direction Y is relatively short, and the width of the housing 201 perpendicular to the second direction Y is relatively wide and the length is sufficient, the multiple battery modules 100 are arranged in a rectangular array within the housing 201, and along the... The housing 201 is perpendicular to the width direction of the second direction Y, and adjacent battery modules 100 are spaced apart to reserve gaps for electrical connection wiring of the terminal structure 144. When the length of the battery module 100 along the second direction Y is relatively long, and the width of the housing 201 perpendicular to the second direction Y is relatively wide but the length is relatively short, multiple battery modules 100 are sequentially spaced apart along the width direction of the housing 201 perpendicular to the second direction Y, so that gaps are reserved between adjacent battery modules 100 for electrical connection wiring of the terminal structure 144.

[0104] According to a second aspect of this application, an electrical device 300 is provided. The electrical device 300 includes a battery device 200 as described above, which is used for charging and storing energy, and for discharging energy to provide power to the electrical load of the electrical device 300.

[0105] Electrical equipment 300 includes, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, and spacecraft. Electric toys may include, but are not limited to, stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Spacecraft may include, but are not limited to, airplanes, rockets, space shuttles, and spacecraft.

[0106] In the embodiments of this application, the electrical device 300 is an electric vehicle, such as... Figure 9 As shown, the battery device 200 is mounted on the frame 301 of the electric vehicle. The battery device 200 provided by the embodiment of this application supplies power to the drive motor 302 of the electric vehicle (i.e., the electrical load of the electrical equipment 300), and the drive motor 302 drives the wheels 303 to rotate, so that the electric vehicle can drive normally.

[0107] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, include: The outer shell forms a storage space; The battery module is disposed within the accommodating space; wherein... The battery module includes: The battery cell is configured as a square structure, with at least two battery cells stacked in a first direction, which is consistent with the thickness direction of the battery cell and the height direction of the casing. The thickness of the battery cell is less than the length and width of the battery cell, and the battery cell includes an electrode structure. A structural component is fixed to at least one surface of the battery module, and the structural component avoids the terminal post structure; the structural component includes a first layer plate, a second layer plate, and a pull bar, the first layer plate and the second layer plate are respectively disposed on the uppermost side surface and the lowermost side surface of the battery module, the two ends of the pull bar are respectively connected to the edge of the first layer plate and the edge of the second layer plate, the first layer plate and the second layer plate clamp and fix the battery cell, wherein the plate surfaces of the first layer plate and the second layer plate are both perpendicular to the first direction.

2. The battery device according to claim 1, characterized in that, The structural component further includes at least one intermediate layer plate, which is disposed between the first layer plate and the second layer plate, and the battery cells are disposed on both the upper and lower sides of the intermediate layer plate.

3. The battery device according to claim 1 or 2, characterized in that, The structural component also includes a partition, the two ends of which are respectively connected to the first layer plate and the second layer plate. The surface of the partition is parallel to the first direction. The first layer plate, the second layer plate, and the partition form a first installation space and a second installation space. The battery cells are stacked in both the first installation space and the second installation space, and the battery cells abut against the partition.

4. The battery device according to claim 3, characterized in that, The battery cell located in the first mounting space and the battery cell located in the second mounting space are symmetrically arranged with respect to the separator, and the electrode structure is disposed on the surface of the battery cell away from the separator.

5. The battery device according to claim 4, characterized in that, Within the first installation space and the second installation space, a plurality of battery cells are sequentially laid out along the second direction to form a layer, and multiple layers are stacked along the first direction, wherein the second direction is perpendicular to the first direction and parallel to the surface of the separator.

6. The battery device according to claim 5, characterized in that, Along the second direction, the shoulders of two adjacent battery cells are simultaneously pressed against by one of the pull strips.

7. The battery device according to claim 6, characterized in that, Structural adhesive is provided between the pull strip and the battery cell.

8. The battery device according to claim 1 or 2, characterized in that, One end of the pull rod is connected to the edge of the first layer plate, and the other end of the pull rod is connected to the edge of the second layer plate by bolts or welding.

9. The battery device according to claim 2, characterized in that, The intermediate layer includes a liquid cooling plate; At least one liquid cooling plate is provided between any two adjacent battery cells; Alternatively, the liquid cooling plate may have multiple layers of battery cells on both its upper and lower sides.

10. The battery device according to claim 1 or 2, characterized in that, The first layer plate is provided with a first liquid cooling channel, which is used for the flow of coolant; And / or, the second layer plate is provided with a second liquid cooling channel for supplying coolant.

11. The battery device according to claim 3, characterized in that, The partition is provided with a third liquid cooling channel, which is used for the flow of coolant.

12. The battery device according to claim 3, characterized in that, Structural adhesive is provided between the surface of the battery cell facing the separator and the separator.

13. The battery device according to claim 1 or 2, characterized in that, Structural adhesive is provided between the surface of the battery cell facing the first layer and the first layer, and between the surface of the battery cell facing the second layer and the second layer.

14. The battery device according to claim 3, characterized in that, The first layer plate and the partition plate are connected by bolts or welding; And / or, the second layer plate is connected to the partition plate by bolts or welding.

15. The battery device according to claim 1 or 2, characterized in that, The casing includes a casing and a cover. The cover fits onto the casing to form the receiving space. The bottom of the casing is provided with a load-bearing beam. Any opposite edge regions formed by the structural components in the battery module are corresponding to the load-bearing beam.

16. The battery device according to claim 15, characterized in that, The load-bearing beam extends along the length of the box shell.

17. The battery device according to claim 15, characterized in that, The bottom of the box is provided with a reinforcing beam, and the two ends of the reinforcing beam are respectively connected to two opposite load-bearing beams. The reinforcing beam is attached to the bottom of the box.

18. The battery device according to claim 15, characterized in that, Structural adhesive is provided between the surface of the battery module formed by the structural component facing the bottom of the housing and the bottom of the housing.

19. The battery device according to claim 1 or 2, characterized in that, The battery module is configured as a plurality of modules, which are arranged sequentially in a direction perpendicular to the first direction.

20. An electrical appliance, characterized in that, include: The battery device as described in any one of claims 1-19.

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